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sound/core/pcm_lib.c
71.2 KB
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/* * Digital Audio (PCM) abstract layer |
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
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* Abramo Bagnara <abramo@alsa-project.org> * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ |
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#include <linux/slab.h> #include <linux/time.h> |
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#include <linux/math64.h> |
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#include <linux/export.h> |
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#include <sound/core.h> #include <sound/control.h> |
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#include <sound/tlv.h> |
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#include <sound/info.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/timer.h> |
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#ifdef CONFIG_SND_PCM_XRUN_DEBUG #define CREATE_TRACE_POINTS #include "pcm_trace.h" #else #define trace_hwptr(substream, pos, in_interrupt) #define trace_xrun(substream) #define trace_hw_ptr_error(substream, reason) #endif |
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/* * fill ring buffer with silence * runtime->silence_start: starting pointer to silence area * runtime->silence_filled: size filled with silence * runtime->silence_threshold: threshold from application * runtime->silence_size: maximal size from application * * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately */ |
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void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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snd_pcm_uframes_t frames, ofs, transfer; if (runtime->silence_size < runtime->boundary) { snd_pcm_sframes_t noise_dist, n; if (runtime->silence_start != runtime->control->appl_ptr) { n = runtime->control->appl_ptr - runtime->silence_start; if (n < 0) n += runtime->boundary; if ((snd_pcm_uframes_t)n < runtime->silence_filled) runtime->silence_filled -= n; else runtime->silence_filled = 0; runtime->silence_start = runtime->control->appl_ptr; } |
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if (runtime->silence_filled >= runtime->buffer_size) |
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return; |
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noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) return; frames = runtime->silence_threshold - noise_dist; if (frames > runtime->silence_size) frames = runtime->silence_size; } else { if (new_hw_ptr == ULONG_MAX) { /* initialization */ snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); |
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if (avail > runtime->buffer_size) avail = runtime->buffer_size; |
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runtime->silence_filled = avail > 0 ? avail : 0; runtime->silence_start = (runtime->status->hw_ptr + runtime->silence_filled) % runtime->boundary; } else { ofs = runtime->status->hw_ptr; frames = new_hw_ptr - ofs; if ((snd_pcm_sframes_t)frames < 0) frames += runtime->boundary; runtime->silence_filled -= frames; if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { runtime->silence_filled = 0; |
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runtime->silence_start = new_hw_ptr; |
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} else { |
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runtime->silence_start = ofs; |
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} |
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} frames = runtime->buffer_size - runtime->silence_filled; } |
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if (snd_BUG_ON(frames > runtime->buffer_size)) return; |
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if (frames == 0) return; |
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ofs = runtime->silence_start % runtime->buffer_size; |
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while (frames > 0) { transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { if (substream->ops->silence) { int err; err = substream->ops->silence(substream, -1, ofs, transfer); |
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snd_BUG_ON(err < 0); |
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} else { char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); } } else { unsigned int c; unsigned int channels = runtime->channels; if (substream->ops->silence) { for (c = 0; c < channels; ++c) { int err; err = substream->ops->silence(substream, c, ofs, transfer); |
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snd_BUG_ON(err < 0); |
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} } else { size_t dma_csize = runtime->dma_bytes / channels; for (c = 0; c < channels; ++c) { char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); } } } runtime->silence_filled += transfer; frames -= transfer; ofs = 0; } } |
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#ifdef CONFIG_SND_DEBUG void snd_pcm_debug_name(struct snd_pcm_substream *substream, |
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char *name, size_t len) { snprintf(name, len, "pcmC%dD%d%c:%d", substream->pcm->card->number, substream->pcm->device, substream->stream ? 'c' : 'p', substream->number); } |
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EXPORT_SYMBOL(snd_pcm_debug_name); #endif |
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|
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#define XRUN_DEBUG_BASIC (1<<0) #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ |
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#ifdef CONFIG_SND_PCM_XRUN_DEBUG |
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|
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#define xrun_debug(substream, mask) \ ((substream)->pstr->xrun_debug & (mask)) |
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#else #define xrun_debug(substream, mask) 0 #endif |
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#define dump_stack_on_xrun(substream) do { \ if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ dump_stack(); \ |
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} while (0) |
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static void xrun(struct snd_pcm_substream *substream) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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trace_xrun(substream); |
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if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); |
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snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
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if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
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char name[16]; |
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snd_pcm_debug_name(substream, name, sizeof(name)); |
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pcm_warn(substream->pcm, "XRUN: %s ", name); |
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dump_stack_on_xrun(substream); |
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} |
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} |
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#ifdef CONFIG_SND_PCM_XRUN_DEBUG |
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#define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
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do { \ |
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trace_hw_ptr_error(substream, reason); \ |
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if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
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pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ (in_interrupt) ? 'Q' : 'P', ##args); \ |
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dump_stack_on_xrun(substream); \ } \ } while (0) |
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#else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
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#define hw_ptr_error(substream, fmt, args...) do { } while (0) |
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#endif |
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int snd_pcm_update_state(struct snd_pcm_substream *substream, struct snd_pcm_runtime *runtime) |
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{ snd_pcm_uframes_t avail; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) avail = snd_pcm_playback_avail(runtime); else avail = snd_pcm_capture_avail(runtime); if (avail > runtime->avail_max) runtime->avail_max = avail; |
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if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { if (avail >= runtime->buffer_size) { |
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snd_pcm_drain_done(substream); |
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return -EPIPE; } } else { if (avail >= runtime->stop_threshold) { |
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xrun(substream); |
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return -EPIPE; } |
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} |
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if (runtime->twake) { if (avail >= runtime->twake) wake_up(&runtime->tsleep); } else if (avail >= runtime->control->avail_min) wake_up(&runtime->sleep); |
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return 0; } |
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static void update_audio_tstamp(struct snd_pcm_substream *substream, struct timespec *curr_tstamp, struct timespec *audio_tstamp) { struct snd_pcm_runtime *runtime = substream->runtime; u64 audio_frames, audio_nsecs; struct timespec driver_tstamp; if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) return; if (!(substream->ops->get_time_info) || (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { /* * provide audio timestamp derived from pointer position * add delay only if requested */ audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; if (runtime->audio_tstamp_config.report_delay) { if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) audio_frames -= runtime->delay; else audio_frames += runtime->delay; } audio_nsecs = div_u64(audio_frames * 1000000000LL, runtime->rate); *audio_tstamp = ns_to_timespec(audio_nsecs); } runtime->status->audio_tstamp = *audio_tstamp; runtime->status->tstamp = *curr_tstamp; /* * re-take a driver timestamp to let apps detect if the reference tstamp * read by low-level hardware was provided with a delay */ snd_pcm_gettime(substream->runtime, (struct timespec *)&driver_tstamp); runtime->driver_tstamp = driver_tstamp; } |
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static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, unsigned int in_interrupt) |
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{ |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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snd_pcm_uframes_t pos; |
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snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
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snd_pcm_sframes_t hdelta, delta; unsigned long jdelta; |
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unsigned long curr_jiffies; struct timespec curr_tstamp; |
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struct timespec audio_tstamp; |
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int crossed_boundary = 0; |
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|
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old_hw_ptr = runtime->status->hw_ptr; |
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/* * group pointer, time and jiffies reads to allow for more * accurate correlations/corrections. * The values are stored at the end of this routine after * corrections for hw_ptr position */ |
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pos = substream->ops->pointer(substream); |
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curr_jiffies = jiffies; |
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if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
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if ((substream->ops->get_time_info) && (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { substream->ops->get_time_info(substream, &curr_tstamp, &audio_tstamp, &runtime->audio_tstamp_config, &runtime->audio_tstamp_report); /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); } else snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); |
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} |
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if (pos == SNDRV_PCM_POS_XRUN) { xrun(substream); return -EPIPE; } |
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if (pos >= runtime->buffer_size) { |
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if (printk_ratelimit()) { |
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char name[16]; |
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snd_pcm_debug_name(substream, name, sizeof(name)); |
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pcm_err(substream->pcm, |
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"BUG: %s, pos = %ld, buffer size = %ld, period size = %ld ", |
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name, pos, runtime->buffer_size, runtime->period_size); |
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} pos = 0; |
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} |
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pos -= pos % runtime->min_align; |
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trace_hwptr(substream, pos, in_interrupt); |
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hw_base = runtime->hw_ptr_base; new_hw_ptr = hw_base + pos; |
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if (in_interrupt) { /* we know that one period was processed */ /* delta = "expected next hw_ptr" for in_interrupt != 0 */ |
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delta = runtime->hw_ptr_interrupt + runtime->period_size; |
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if (delta > new_hw_ptr) { |
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/* check for double acknowledged interrupts */ |
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hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
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if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
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hw_base += runtime->buffer_size; |
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if (hw_base >= runtime->boundary) { |
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hw_base = 0; |
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crossed_boundary++; } |
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new_hw_ptr = hw_base + pos; goto __delta; } |
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} |
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} |
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/* new_hw_ptr might be lower than old_hw_ptr in case when */ /* pointer crosses the end of the ring buffer */ if (new_hw_ptr < old_hw_ptr) { hw_base += runtime->buffer_size; |
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if (hw_base >= runtime->boundary) { |
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hw_base = 0; |
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crossed_boundary++; } |
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new_hw_ptr = hw_base + pos; } __delta: |
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delta = new_hw_ptr - old_hw_ptr; if (delta < 0) delta += runtime->boundary; |
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|
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if (runtime->no_period_wakeup) { |
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snd_pcm_sframes_t xrun_threshold; |
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/* * Without regular period interrupts, we have to check * the elapsed time to detect xruns. */ |
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jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
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if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) goto no_delta_check; |
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hdelta = jdelta - delta * HZ / runtime->rate; |
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xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; while (hdelta > xrun_threshold) { |
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delta += runtime->buffer_size; hw_base += runtime->buffer_size; |
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if (hw_base >= runtime->boundary) { |
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hw_base = 0; |
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crossed_boundary++; } |
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new_hw_ptr = hw_base + pos; hdelta -= runtime->hw_ptr_buffer_jiffies; } |
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goto no_delta_check; |
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} |
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|
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/* something must be really wrong */ |
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if (delta >= runtime->buffer_size + runtime->period_size) { |
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hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld) ", substream->stream, (long)pos, (long)new_hw_ptr, (long)old_hw_ptr); |
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return 0; } |
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/* Do jiffies check only in xrun_debug mode */ |
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if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
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goto no_jiffies_check; |
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/* Skip the jiffies check for hardwares with BATCH flag. * Such hardware usually just increases the position at each IRQ, * thus it can't give any strange position. */ if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) goto no_jiffies_check; |
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hdelta = delta; |
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if (hdelta < runtime->delay) goto no_jiffies_check; hdelta -= runtime->delay; |
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jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
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if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { delta = jdelta / (((runtime->period_size * HZ) / runtime->rate) + HZ/100); |
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409 410 |
/* move new_hw_ptr according jiffies not pos variable */ new_hw_ptr = old_hw_ptr; |
ed69c6a8e ALSA: pcm_lib - f... |
411 |
hw_base = delta; |
f240406ba ALSA: pcm_lib - c... |
412 413 414 415 |
/* use loop to avoid checks for delta overflows */ /* the delta value is small or zero in most cases */ while (delta > 0) { new_hw_ptr += runtime->period_size; |
0e8014d77 ALSA: core: keep ... |
416 |
if (new_hw_ptr >= runtime->boundary) { |
f240406ba ALSA: pcm_lib - c... |
417 |
new_hw_ptr -= runtime->boundary; |
0e8014d77 ALSA: core: keep ... |
418 419 |
crossed_boundary--; } |
f240406ba ALSA: pcm_lib - c... |
420 421 422 |
delta--; } /* align hw_base to buffer_size */ |
f5914908a ALSA: pcm: Replac... |
423 424 425 |
hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld) ", |
bbf6ad139 [ALSA] pcm-midlev... |
426 427 |
(long)pos, (long)hdelta, (long)runtime->period_size, jdelta, |
ed69c6a8e ALSA: pcm_lib - f... |
428 |
((hdelta * HZ) / runtime->rate), hw_base, |
f240406ba ALSA: pcm_lib - c... |
429 430 |
(unsigned long)old_hw_ptr, (unsigned long)new_hw_ptr); |
ed69c6a8e ALSA: pcm_lib - f... |
431 432 433 |
/* reset values to proper state */ delta = 0; hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); |
bbf6ad139 [ALSA] pcm-midlev... |
434 |
} |
3e5b50165 ALSA: pcm core - ... |
435 |
no_jiffies_check: |
bbf6ad139 [ALSA] pcm-midlev... |
436 |
if (delta > runtime->period_size + runtime->period_size / 2) { |
f5914908a ALSA: pcm: Replac... |
437 438 439 440 |
hw_ptr_error(substream, in_interrupt, "Lost interrupts?", "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld) ", |
ed3da3d9a ALSA: Rewrite hw_... |
441 |
substream->stream, (long)delta, |
f240406ba ALSA: pcm_lib - c... |
442 443 |
(long)new_hw_ptr, (long)old_hw_ptr); |
ed3da3d9a ALSA: Rewrite hw_... |
444 |
} |
f240406ba ALSA: pcm_lib - c... |
445 |
|
ab69a4904 ALSA: pcm: suppor... |
446 |
no_delta_check: |
3179f6200 ALSA: core: add .... |
447 448 |
if (runtime->status->hw_ptr == new_hw_ptr) { update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
f240406ba ALSA: pcm_lib - c... |
449 |
return 0; |
3179f6200 ALSA: core: add .... |
450 |
} |
ab1863fc9 ALSA: pcm - Fix u... |
451 |
|
1da177e4c Linux-2.6.12-rc2 |
452 453 454 |
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && runtime->silence_size > 0) snd_pcm_playback_silence(substream, new_hw_ptr); |
e76369257 ALSA: pcm_lib - r... |
455 |
if (in_interrupt) { |
ead4046b2 ALSA: pcm: fix th... |
456 457 458 459 460 461 462 |
delta = new_hw_ptr - runtime->hw_ptr_interrupt; if (delta < 0) delta += runtime->boundary; delta -= (snd_pcm_uframes_t)delta % runtime->period_size; runtime->hw_ptr_interrupt += delta; if (runtime->hw_ptr_interrupt >= runtime->boundary) runtime->hw_ptr_interrupt -= runtime->boundary; |
e76369257 ALSA: pcm_lib - r... |
463 |
} |
ed3da3d9a ALSA: Rewrite hw_... |
464 |
runtime->hw_ptr_base = hw_base; |
1da177e4c Linux-2.6.12-rc2 |
465 |
runtime->status->hw_ptr = new_hw_ptr; |
3509a03f4 ALSA: core: group... |
466 |
runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d77 ALSA: core: keep ... |
467 468 469 470 |
if (crossed_boundary) { snd_BUG_ON(crossed_boundary != 1); runtime->hw_ptr_wrap += runtime->boundary; } |
4eeaaeaea ALSA: core: add h... |
471 |
|
3179f6200 ALSA: core: add .... |
472 |
update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
4eeaaeaea ALSA: core: add h... |
473 |
|
1250932e4 ALSA: pcm_lib - o... |
474 |
return snd_pcm_update_state(substream, runtime); |
1da177e4c Linux-2.6.12-rc2 |
475 476 477 |
} /* CAUTION: call it with irq disabled */ |
877211f5e [ALSA] Remove xxx... |
478 |
int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
479 |
{ |
f240406ba ALSA: pcm_lib - c... |
480 |
return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4c Linux-2.6.12-rc2 |
481 482 483 484 485 486 487 488 489 490 |
} /** * snd_pcm_set_ops - set the PCM operators * @pcm: the pcm instance * @direction: stream direction, SNDRV_PCM_STREAM_XXX * @ops: the operator table * * Sets the given PCM operators to the pcm instance. */ |
e6c2e7eb2 ALSA: Constify th... |
491 492 |
void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, const struct snd_pcm_ops *ops) |
1da177e4c Linux-2.6.12-rc2 |
493 |
{ |
877211f5e [ALSA] Remove xxx... |
494 495 |
struct snd_pcm_str *stream = &pcm->streams[direction]; struct snd_pcm_substream *substream; |
1da177e4c Linux-2.6.12-rc2 |
496 497 498 499 |
for (substream = stream->substream; substream != NULL; substream = substream->next) substream->ops = ops; } |
e88e8ae63 [ALSA] Move OSS-s... |
500 |
EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4c Linux-2.6.12-rc2 |
501 502 503 504 505 506 507 |
/** * snd_pcm_sync - set the PCM sync id * @substream: the pcm substream * * Sets the PCM sync identifier for the card. */ |
877211f5e [ALSA] Remove xxx... |
508 |
void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
509 |
{ |
877211f5e [ALSA] Remove xxx... |
510 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
511 512 513 514 515 516 |
runtime->sync.id32[0] = substream->pcm->card->number; runtime->sync.id32[1] = -1; runtime->sync.id32[2] = -1; runtime->sync.id32[3] = -1; } |
e88e8ae63 [ALSA] Move OSS-s... |
517 |
EXPORT_SYMBOL(snd_pcm_set_sync); |
1da177e4c Linux-2.6.12-rc2 |
518 519 520 |
/* * Standard ioctl routine */ |
1da177e4c Linux-2.6.12-rc2 |
521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 |
static inline unsigned int div32(unsigned int a, unsigned int b, unsigned int *r) { if (b == 0) { *r = 0; return UINT_MAX; } *r = a % b; return a / b; } static inline unsigned int div_down(unsigned int a, unsigned int b) { if (b == 0) return UINT_MAX; return a / b; } static inline unsigned int div_up(unsigned int a, unsigned int b) { unsigned int r; unsigned int q; if (b == 0) return UINT_MAX; q = div32(a, b, &r); if (r) ++q; return q; } static inline unsigned int mul(unsigned int a, unsigned int b) { if (a == 0) return 0; if (div_down(UINT_MAX, a) < b) return UINT_MAX; return a * b; } static inline unsigned int muldiv32(unsigned int a, unsigned int b, unsigned int c, unsigned int *r) { u_int64_t n = (u_int64_t) a * b; if (c == 0) { |
7eaa943c8 ALSA: Kill snd_as... |
565 |
snd_BUG_ON(!n); |
1da177e4c Linux-2.6.12-rc2 |
566 567 568 |
*r = 0; return UINT_MAX; } |
3f7440a6b ALSA: Clean up 64... |
569 |
n = div_u64_rem(n, c, r); |
1da177e4c Linux-2.6.12-rc2 |
570 571 572 573 574 575 |
if (n >= UINT_MAX) { *r = 0; return UINT_MAX; } return n; } |
1da177e4c Linux-2.6.12-rc2 |
576 577 578 579 580 581 582 583 584 |
/** * snd_interval_refine - refine the interval value of configurator * @i: the interval value to refine * @v: the interval value to refer to * * Refines the interval value with the reference value. * The interval is changed to the range satisfying both intervals. * The interval status (min, max, integer, etc.) are evaluated. * |
eb7c06e8e ALSA: add/change ... |
585 586 |
* Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
587 |
*/ |
877211f5e [ALSA] Remove xxx... |
588 |
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4c Linux-2.6.12-rc2 |
589 590 |
{ int changed = 0; |
7eaa943c8 ALSA: Kill snd_as... |
591 592 |
if (snd_BUG_ON(snd_interval_empty(i))) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 |
if (i->min < v->min) { i->min = v->min; i->openmin = v->openmin; changed = 1; } else if (i->min == v->min && !i->openmin && v->openmin) { i->openmin = 1; changed = 1; } if (i->max > v->max) { i->max = v->max; i->openmax = v->openmax; changed = 1; } else if (i->max == v->max && !i->openmax && v->openmax) { i->openmax = 1; changed = 1; } if (!i->integer && v->integer) { i->integer = 1; changed = 1; } if (i->integer) { if (i->openmin) { i->min++; i->openmin = 0; } if (i->openmax) { i->max--; i->openmax = 0; } } else if (!i->openmin && !i->openmax && i->min == i->max) i->integer = 1; if (snd_interval_checkempty(i)) { snd_interval_none(i); return -EINVAL; } return changed; } |
e88e8ae63 [ALSA] Move OSS-s... |
630 |
EXPORT_SYMBOL(snd_interval_refine); |
877211f5e [ALSA] Remove xxx... |
631 |
static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4c Linux-2.6.12-rc2 |
632 |
{ |
7eaa943c8 ALSA: Kill snd_as... |
633 634 |
if (snd_BUG_ON(snd_interval_empty(i))) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
635 636 637 638 639 640 641 642 |
if (snd_interval_single(i)) return 0; i->max = i->min; i->openmax = i->openmin; if (i->openmax) i->max++; return 1; } |
877211f5e [ALSA] Remove xxx... |
643 |
static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4c Linux-2.6.12-rc2 |
644 |
{ |
7eaa943c8 ALSA: Kill snd_as... |
645 646 |
if (snd_BUG_ON(snd_interval_empty(i))) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
647 648 649 650 651 652 653 654 |
if (snd_interval_single(i)) return 0; i->min = i->max; i->openmin = i->openmax; if (i->openmin) i->min--; return 1; } |
877211f5e [ALSA] Remove xxx... |
655 |
void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4c Linux-2.6.12-rc2 |
656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 |
{ if (a->empty || b->empty) { snd_interval_none(c); return; } c->empty = 0; c->min = mul(a->min, b->min); c->openmin = (a->openmin || b->openmin); c->max = mul(a->max, b->max); c->openmax = (a->openmax || b->openmax); c->integer = (a->integer && b->integer); } /** * snd_interval_div - refine the interval value with division |
df8db936e [ALSA] Fix DocBoo... |
671 672 673 |
* @a: dividend * @b: divisor * @c: quotient |
1da177e4c Linux-2.6.12-rc2 |
674 675 676 677 678 |
* * c = a / b * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
679 |
void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4c Linux-2.6.12-rc2 |
680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 |
{ unsigned int r; if (a->empty || b->empty) { snd_interval_none(c); return; } c->empty = 0; c->min = div32(a->min, b->max, &r); c->openmin = (r || a->openmin || b->openmax); if (b->min > 0) { c->max = div32(a->max, b->min, &r); if (r) { c->max++; c->openmax = 1; } else c->openmax = (a->openmax || b->openmin); } else { c->max = UINT_MAX; c->openmax = 0; } c->integer = 0; } /** * snd_interval_muldivk - refine the interval value |
df8db936e [ALSA] Fix DocBoo... |
705 706 707 708 709 |
* @a: dividend 1 * @b: dividend 2 * @k: divisor (as integer) * @c: result * |
1da177e4c Linux-2.6.12-rc2 |
710 711 712 713 |
* c = a * b / k * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
714 715 |
void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, unsigned int k, struct snd_interval *c) |
1da177e4c Linux-2.6.12-rc2 |
716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 |
{ unsigned int r; if (a->empty || b->empty) { snd_interval_none(c); return; } c->empty = 0; c->min = muldiv32(a->min, b->min, k, &r); c->openmin = (r || a->openmin || b->openmin); c->max = muldiv32(a->max, b->max, k, &r); if (r) { c->max++; c->openmax = 1; } else c->openmax = (a->openmax || b->openmax); c->integer = 0; } /** * snd_interval_mulkdiv - refine the interval value |
df8db936e [ALSA] Fix DocBoo... |
736 737 738 739 |
* @a: dividend 1 * @k: dividend 2 (as integer) * @b: divisor * @c: result |
1da177e4c Linux-2.6.12-rc2 |
740 741 742 743 744 |
* * c = a * k / b * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
745 746 |
void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, const struct snd_interval *b, struct snd_interval *c) |
1da177e4c Linux-2.6.12-rc2 |
747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 |
{ unsigned int r; if (a->empty || b->empty) { snd_interval_none(c); return; } c->empty = 0; c->min = muldiv32(a->min, k, b->max, &r); c->openmin = (r || a->openmin || b->openmax); if (b->min > 0) { c->max = muldiv32(a->max, k, b->min, &r); if (r) { c->max++; c->openmax = 1; } else c->openmax = (a->openmax || b->openmin); } else { c->max = UINT_MAX; c->openmax = 0; } c->integer = 0; } |
1da177e4c Linux-2.6.12-rc2 |
769 770 771 772 773 |
/* ---- */ /** * snd_interval_ratnum - refine the interval value |
df8db936e [ALSA] Fix DocBoo... |
774 775 776 777 778 |
* @i: interval to refine * @rats_count: number of ratnum_t * @rats: ratnum_t array * @nump: pointer to store the resultant numerator * @denp: pointer to store the resultant denominator |
1da177e4c Linux-2.6.12-rc2 |
779 |
* |
eb7c06e8e ALSA: add/change ... |
780 781 |
* Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
782 |
*/ |
877211f5e [ALSA] Remove xxx... |
783 784 785 |
int snd_interval_ratnum(struct snd_interval *i, unsigned int rats_count, struct snd_ratnum *rats, unsigned int *nump, unsigned int *denp) |
1da177e4c Linux-2.6.12-rc2 |
786 |
{ |
8374e24c2 ALSA: refine rate... |
787 788 |
unsigned int best_num, best_den; int best_diff; |
1da177e4c Linux-2.6.12-rc2 |
789 |
unsigned int k; |
877211f5e [ALSA] Remove xxx... |
790 |
struct snd_interval t; |
1da177e4c Linux-2.6.12-rc2 |
791 |
int err; |
8374e24c2 ALSA: refine rate... |
792 793 |
unsigned int result_num, result_den; int result_diff; |
1da177e4c Linux-2.6.12-rc2 |
794 795 796 797 798 799 800 801 802 |
best_num = best_den = best_diff = 0; for (k = 0; k < rats_count; ++k) { unsigned int num = rats[k].num; unsigned int den; unsigned int q = i->min; int diff; if (q == 0) q = 1; |
40962d7c7 ALSA: fix incorre... |
803 |
den = div_up(num, q); |
1da177e4c Linux-2.6.12-rc2 |
804 805 806 807 808 809 810 811 812 813 814 |
if (den < rats[k].den_min) continue; if (den > rats[k].den_max) den = rats[k].den_max; else { unsigned int r; r = (den - rats[k].den_min) % rats[k].den_step; if (r != 0) den -= r; } diff = num - q * den; |
8374e24c2 ALSA: refine rate... |
815 816 |
if (diff < 0) diff = -diff; |
1da177e4c Linux-2.6.12-rc2 |
817 818 819 820 821 822 823 824 825 826 827 828 829 830 |
if (best_num == 0 || diff * best_den < best_diff * den) { best_diff = diff; best_den = den; best_num = num; } } if (best_den == 0) { i->empty = 1; return -EINVAL; } t.min = div_down(best_num, best_den); t.openmin = !!(best_num % best_den); |
8374e24c2 ALSA: refine rate... |
831 832 833 |
result_num = best_num; result_diff = best_diff; result_den = best_den; |
1da177e4c Linux-2.6.12-rc2 |
834 835 836 837 838 839 840 841 842 843 |
best_num = best_den = best_diff = 0; for (k = 0; k < rats_count; ++k) { unsigned int num = rats[k].num; unsigned int den; unsigned int q = i->max; int diff; if (q == 0) { i->empty = 1; return -EINVAL; } |
40962d7c7 ALSA: fix incorre... |
844 |
den = div_down(num, q); |
1da177e4c Linux-2.6.12-rc2 |
845 846 847 848 849 850 851 852 853 854 855 |
if (den > rats[k].den_max) continue; if (den < rats[k].den_min) den = rats[k].den_min; else { unsigned int r; r = (den - rats[k].den_min) % rats[k].den_step; if (r != 0) den += rats[k].den_step - r; } diff = q * den - num; |
8374e24c2 ALSA: refine rate... |
856 857 |
if (diff < 0) diff = -diff; |
1da177e4c Linux-2.6.12-rc2 |
858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 |
if (best_num == 0 || diff * best_den < best_diff * den) { best_diff = diff; best_den = den; best_num = num; } } if (best_den == 0) { i->empty = 1; return -EINVAL; } t.max = div_up(best_num, best_den); t.openmax = !!(best_num % best_den); t.integer = 0; err = snd_interval_refine(i, &t); if (err < 0) return err; if (snd_interval_single(i)) { |
8374e24c2 ALSA: refine rate... |
877 878 879 880 |
if (best_diff * result_den < result_diff * best_den) { result_num = best_num; result_den = best_den; } |
1da177e4c Linux-2.6.12-rc2 |
881 |
if (nump) |
8374e24c2 ALSA: refine rate... |
882 |
*nump = result_num; |
1da177e4c Linux-2.6.12-rc2 |
883 |
if (denp) |
8374e24c2 ALSA: refine rate... |
884 |
*denp = result_den; |
1da177e4c Linux-2.6.12-rc2 |
885 886 887 |
} return err; } |
e88e8ae63 [ALSA] Move OSS-s... |
888 |
EXPORT_SYMBOL(snd_interval_ratnum); |
1da177e4c Linux-2.6.12-rc2 |
889 890 |
/** * snd_interval_ratden - refine the interval value |
df8db936e [ALSA] Fix DocBoo... |
891 |
* @i: interval to refine |
877211f5e [ALSA] Remove xxx... |
892 893 |
* @rats_count: number of struct ratden * @rats: struct ratden array |
df8db936e [ALSA] Fix DocBoo... |
894 895 |
* @nump: pointer to store the resultant numerator * @denp: pointer to store the resultant denominator |
1da177e4c Linux-2.6.12-rc2 |
896 |
* |
eb7c06e8e ALSA: add/change ... |
897 898 |
* Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
899 |
*/ |
877211f5e [ALSA] Remove xxx... |
900 901 |
static int snd_interval_ratden(struct snd_interval *i, unsigned int rats_count, struct snd_ratden *rats, |
1da177e4c Linux-2.6.12-rc2 |
902 903 904 905 |
unsigned int *nump, unsigned int *denp) { unsigned int best_num, best_diff, best_den; unsigned int k; |
877211f5e [ALSA] Remove xxx... |
906 |
struct snd_interval t; |
1da177e4c Linux-2.6.12-rc2 |
907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 |
int err; best_num = best_den = best_diff = 0; for (k = 0; k < rats_count; ++k) { unsigned int num; unsigned int den = rats[k].den; unsigned int q = i->min; int diff; num = mul(q, den); if (num > rats[k].num_max) continue; if (num < rats[k].num_min) num = rats[k].num_max; else { unsigned int r; r = (num - rats[k].num_min) % rats[k].num_step; if (r != 0) num += rats[k].num_step - r; } diff = num - q * den; if (best_num == 0 || diff * best_den < best_diff * den) { best_diff = diff; best_den = den; best_num = num; } } if (best_den == 0) { i->empty = 1; return -EINVAL; } t.min = div_down(best_num, best_den); t.openmin = !!(best_num % best_den); best_num = best_den = best_diff = 0; for (k = 0; k < rats_count; ++k) { unsigned int num; unsigned int den = rats[k].den; unsigned int q = i->max; int diff; num = mul(q, den); if (num < rats[k].num_min) continue; if (num > rats[k].num_max) num = rats[k].num_max; else { unsigned int r; r = (num - rats[k].num_min) % rats[k].num_step; if (r != 0) num -= r; } diff = q * den - num; if (best_num == 0 || diff * best_den < best_diff * den) { best_diff = diff; best_den = den; best_num = num; } } if (best_den == 0) { i->empty = 1; return -EINVAL; } t.max = div_up(best_num, best_den); t.openmax = !!(best_num % best_den); t.integer = 0; err = snd_interval_refine(i, &t); if (err < 0) return err; if (snd_interval_single(i)) { if (nump) *nump = best_num; if (denp) *denp = best_den; } return err; } /** * snd_interval_list - refine the interval value from the list * @i: the interval value to refine * @count: the number of elements in the list * @list: the value list * @mask: the bit-mask to evaluate * * Refines the interval value from the list. * When mask is non-zero, only the elements corresponding to bit 1 are * evaluated. * |
eb7c06e8e ALSA: add/change ... |
997 998 |
* Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
999 |
*/ |
4af87a939 ALSA: pcm: Consti... |
1000 1001 |
int snd_interval_list(struct snd_interval *i, unsigned int count, const unsigned int *list, unsigned int mask) |
1da177e4c Linux-2.6.12-rc2 |
1002 1003 |
{ unsigned int k; |
b1ddaf681 sound: pcm_lib: f... |
1004 |
struct snd_interval list_range; |
0981a260a [ALSA] Fix possib... |
1005 1006 1007 1008 1009 |
if (!count) { i->empty = 1; return -EINVAL; } |
b1ddaf681 sound: pcm_lib: f... |
1010 1011 1012 |
snd_interval_any(&list_range); list_range.min = UINT_MAX; list_range.max = 0; |
1da177e4c Linux-2.6.12-rc2 |
1013 1014 1015 |
for (k = 0; k < count; k++) { if (mask && !(mask & (1 << k))) continue; |
b1ddaf681 sound: pcm_lib: f... |
1016 |
if (!snd_interval_test(i, list[k])) |
1da177e4c Linux-2.6.12-rc2 |
1017 |
continue; |
b1ddaf681 sound: pcm_lib: f... |
1018 1019 |
list_range.min = min(list_range.min, list[k]); list_range.max = max(list_range.max, list[k]); |
1da177e4c Linux-2.6.12-rc2 |
1020 |
} |
b1ddaf681 sound: pcm_lib: f... |
1021 |
return snd_interval_refine(i, &list_range); |
1da177e4c Linux-2.6.12-rc2 |
1022 |
} |
e88e8ae63 [ALSA] Move OSS-s... |
1023 |
EXPORT_SYMBOL(snd_interval_list); |
f66f898e9 ALSA: pcm: Add sn... |
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 |
/** * snd_interval_ranges - refine the interval value from the list of ranges * @i: the interval value to refine * @count: the number of elements in the list of ranges * @ranges: the ranges list * @mask: the bit-mask to evaluate * * Refines the interval value from the list of ranges. * When mask is non-zero, only the elements corresponding to bit 1 are * evaluated. * * Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. */ int snd_interval_ranges(struct snd_interval *i, unsigned int count, const struct snd_interval *ranges, unsigned int mask) { unsigned int k; struct snd_interval range_union; struct snd_interval range; if (!count) { snd_interval_none(i); return -EINVAL; } snd_interval_any(&range_union); range_union.min = UINT_MAX; range_union.max = 0; for (k = 0; k < count; k++) { if (mask && !(mask & (1 << k))) continue; snd_interval_copy(&range, &ranges[k]); if (snd_interval_refine(&range, i) < 0) continue; if (snd_interval_empty(&range)) continue; if (range.min < range_union.min) { range_union.min = range.min; range_union.openmin = 1; } if (range.min == range_union.min && !range.openmin) range_union.openmin = 0; if (range.max > range_union.max) { range_union.max = range.max; range_union.openmax = 1; } if (range.max == range_union.max && !range.openmax) range_union.openmax = 0; } return snd_interval_refine(i, &range_union); } EXPORT_SYMBOL(snd_interval_ranges); |
0f519b622 ALSA: pcm: snd_in... |
1077 |
static int snd_interval_step(struct snd_interval *i, unsigned int step) |
1da177e4c Linux-2.6.12-rc2 |
1078 1079 1080 |
{ unsigned int n; int changed = 0; |
0f519b622 ALSA: pcm: snd_in... |
1081 |
n = i->min % step; |
1da177e4c Linux-2.6.12-rc2 |
1082 1083 |
if (n != 0 || i->openmin) { i->min += step - n; |
df1e47196 ALSA: pcm: snd_in... |
1084 |
i->openmin = 0; |
1da177e4c Linux-2.6.12-rc2 |
1085 1086 |
changed = 1; } |
0f519b622 ALSA: pcm: snd_in... |
1087 |
n = i->max % step; |
1da177e4c Linux-2.6.12-rc2 |
1088 1089 |
if (n != 0 || i->openmax) { i->max -= n; |
df1e47196 ALSA: pcm: snd_in... |
1090 |
i->openmax = 0; |
1da177e4c Linux-2.6.12-rc2 |
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 |
changed = 1; } if (snd_interval_checkempty(i)) { i->empty = 1; return -EINVAL; } return changed; } /* Info constraints helpers */ /** * snd_pcm_hw_rule_add - add the hw-constraint rule * @runtime: the pcm runtime instance * @cond: condition bits * @var: the variable to evaluate * @func: the evaluation function * @private: the private data pointer passed to function * @dep: the dependent variables * |
eb7c06e8e ALSA: add/change ... |
1111 |
* Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1112 |
*/ |
877211f5e [ALSA] Remove xxx... |
1113 |
int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4c Linux-2.6.12-rc2 |
1114 1115 1116 1117 |
int var, snd_pcm_hw_rule_func_t func, void *private, int dep, ...) { |
877211f5e [ALSA] Remove xxx... |
1118 1119 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_pcm_hw_rule *c; |
1da177e4c Linux-2.6.12-rc2 |
1120 1121 1122 1123 |
unsigned int k; va_list args; va_start(args, dep); if (constrs->rules_num >= constrs->rules_all) { |
877211f5e [ALSA] Remove xxx... |
1124 |
struct snd_pcm_hw_rule *new; |
1da177e4c Linux-2.6.12-rc2 |
1125 1126 |
unsigned int new_rules = constrs->rules_all + 16; new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); |
87a1c8aaa ALSA: pcm: rememb... |
1127 1128 |
if (!new) { va_end(args); |
1da177e4c Linux-2.6.12-rc2 |
1129 |
return -ENOMEM; |
87a1c8aaa ALSA: pcm: rememb... |
1130 |
} |
1da177e4c Linux-2.6.12-rc2 |
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 |
if (constrs->rules) { memcpy(new, constrs->rules, constrs->rules_num * sizeof(*c)); kfree(constrs->rules); } constrs->rules = new; constrs->rules_all = new_rules; } c = &constrs->rules[constrs->rules_num]; c->cond = cond; c->func = func; c->var = var; c->private = private; k = 0; while (1) { |
87a1c8aaa ALSA: pcm: rememb... |
1146 1147 |
if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { va_end(args); |
7eaa943c8 ALSA: Kill snd_as... |
1148 |
return -EINVAL; |
87a1c8aaa ALSA: pcm: rememb... |
1149 |
} |
1da177e4c Linux-2.6.12-rc2 |
1150 1151 1152 1153 1154 1155 1156 1157 |
c->deps[k++] = dep; if (dep < 0) break; dep = va_arg(args, int); } constrs->rules_num++; va_end(args); return 0; |
87a1c8aaa ALSA: pcm: rememb... |
1158 |
} |
1da177e4c Linux-2.6.12-rc2 |
1159 |
|
e88e8ae63 [ALSA] Move OSS-s... |
1160 |
EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1da177e4c Linux-2.6.12-rc2 |
1161 |
/** |
1c85cc644 ALSA: kernel docs... |
1162 |
* snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936e [ALSA] Fix DocBoo... |
1163 1164 1165 1166 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the mask * @mask: the bitmap mask * |
1c85cc644 ALSA: kernel docs... |
1167 |
* Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8e ALSA: add/change ... |
1168 1169 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1170 |
*/ |
877211f5e [ALSA] Remove xxx... |
1171 |
int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4c Linux-2.6.12-rc2 |
1172 1173 |
u_int32_t mask) { |
877211f5e [ALSA] Remove xxx... |
1174 1175 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_mask *maskp = constrs_mask(constrs, var); |
1da177e4c Linux-2.6.12-rc2 |
1176 1177 1178 1179 1180 1181 1182 1183 |
*maskp->bits &= mask; memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ if (*maskp->bits == 0) return -EINVAL; return 0; } /** |
1c85cc644 ALSA: kernel docs... |
1184 |
* snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936e [ALSA] Fix DocBoo... |
1185 1186 1187 1188 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the mask * @mask: the 64bit bitmap mask * |
1c85cc644 ALSA: kernel docs... |
1189 |
* Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8e ALSA: add/change ... |
1190 1191 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1192 |
*/ |
877211f5e [ALSA] Remove xxx... |
1193 |
int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4c Linux-2.6.12-rc2 |
1194 1195 |
u_int64_t mask) { |
877211f5e [ALSA] Remove xxx... |
1196 1197 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_mask *maskp = constrs_mask(constrs, var); |
1da177e4c Linux-2.6.12-rc2 |
1198 1199 1200 1201 1202 1203 1204 |
maskp->bits[0] &= (u_int32_t)mask; maskp->bits[1] &= (u_int32_t)(mask >> 32); memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ if (! maskp->bits[0] && ! maskp->bits[1]) return -EINVAL; return 0; } |
63a5d4c6a ALSA: Export snd_... |
1205 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4c Linux-2.6.12-rc2 |
1206 1207 |
/** |
1c85cc644 ALSA: kernel docs... |
1208 |
* snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936e [ALSA] Fix DocBoo... |
1209 1210 1211 1212 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the integer constraint * * Apply the constraint of integer to an interval parameter. |
eb7c06e8e ALSA: add/change ... |
1213 1214 1215 |
* * Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
1216 |
*/ |
877211f5e [ALSA] Remove xxx... |
1217 |
int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1218 |
{ |
877211f5e [ALSA] Remove xxx... |
1219 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4c Linux-2.6.12-rc2 |
1220 1221 |
return snd_interval_setinteger(constrs_interval(constrs, var)); } |
e88e8ae63 [ALSA] Move OSS-s... |
1222 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1da177e4c Linux-2.6.12-rc2 |
1223 |
/** |
1c85cc644 ALSA: kernel docs... |
1224 |
* snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936e [ALSA] Fix DocBoo... |
1225 1226 1227 1228 1229 1230 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the range * @min: the minimal value * @max: the maximal value * * Apply the min/max range constraint to an interval parameter. |
eb7c06e8e ALSA: add/change ... |
1231 1232 1233 |
* * Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
1234 |
*/ |
877211f5e [ALSA] Remove xxx... |
1235 |
int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4c Linux-2.6.12-rc2 |
1236 1237 |
unsigned int min, unsigned int max) { |
877211f5e [ALSA] Remove xxx... |
1238 1239 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_interval t; |
1da177e4c Linux-2.6.12-rc2 |
1240 1241 1242 1243 1244 1245 |
t.min = min; t.max = max; t.openmin = t.openmax = 0; t.integer = 0; return snd_interval_refine(constrs_interval(constrs, var), &t); } |
e88e8ae63 [ALSA] Move OSS-s... |
1246 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
877211f5e [ALSA] Remove xxx... |
1247 1248 |
static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4c Linux-2.6.12-rc2 |
1249 |
{ |
877211f5e [ALSA] Remove xxx... |
1250 |
struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4c Linux-2.6.12-rc2 |
1251 1252 1253 1254 1255 |
return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); } /** |
1c85cc644 ALSA: kernel docs... |
1256 |
* snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936e [ALSA] Fix DocBoo... |
1257 1258 1259 1260 1261 1262 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the list constraint * @l: list * * Apply the list of constraints to an interval parameter. |
eb7c06e8e ALSA: add/change ... |
1263 1264 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1265 |
*/ |
877211f5e [ALSA] Remove xxx... |
1266 |
int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1267 1268 |
unsigned int cond, snd_pcm_hw_param_t var, |
1464189f8 ALSA: pcm: Make c... |
1269 |
const struct snd_pcm_hw_constraint_list *l) |
1da177e4c Linux-2.6.12-rc2 |
1270 1271 |
{ return snd_pcm_hw_rule_add(runtime, cond, var, |
1464189f8 ALSA: pcm: Make c... |
1272 |
snd_pcm_hw_rule_list, (void *)l, |
1da177e4c Linux-2.6.12-rc2 |
1273 1274 |
var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1275 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
f66f898e9 ALSA: pcm: Add sn... |
1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 |
static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_pcm_hw_constraint_ranges *r = rule->private; return snd_interval_ranges(hw_param_interval(params, rule->var), r->count, r->ranges, r->mask); } /** * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter * @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the list of range constraints * @r: ranges * * Apply the list of range constraints to an interval parameter. * * Return: Zero if successful, or a negative error code on failure. */ int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, unsigned int cond, snd_pcm_hw_param_t var, const struct snd_pcm_hw_constraint_ranges *r) { return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_ranges, (void *)r, var, -1); } EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); |
877211f5e [ALSA] Remove xxx... |
1306 1307 |
static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4c Linux-2.6.12-rc2 |
1308 |
{ |
877211f5e [ALSA] Remove xxx... |
1309 |
struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4c Linux-2.6.12-rc2 |
1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 |
unsigned int num = 0, den = 0; int err; err = snd_interval_ratnum(hw_param_interval(params, rule->var), r->nrats, r->rats, &num, &den); if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { params->rate_num = num; params->rate_den = den; } return err; } /** |
1c85cc644 ALSA: kernel docs... |
1322 |
* snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936e [ALSA] Fix DocBoo... |
1323 1324 1325 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the ratnums constraint |
877211f5e [ALSA] Remove xxx... |
1326 |
* @r: struct snd_ratnums constriants |
eb7c06e8e ALSA: add/change ... |
1327 1328 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1329 |
*/ |
877211f5e [ALSA] Remove xxx... |
1330 |
int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1331 1332 |
unsigned int cond, snd_pcm_hw_param_t var, |
877211f5e [ALSA] Remove xxx... |
1333 |
struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4c Linux-2.6.12-rc2 |
1334 1335 1336 1337 1338 |
{ return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_ratnums, r, var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1339 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
877211f5e [ALSA] Remove xxx... |
1340 1341 |
static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4c Linux-2.6.12-rc2 |
1342 |
{ |
877211f5e [ALSA] Remove xxx... |
1343 |
struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4c Linux-2.6.12-rc2 |
1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 |
unsigned int num = 0, den = 0; int err = snd_interval_ratden(hw_param_interval(params, rule->var), r->nrats, r->rats, &num, &den); if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { params->rate_num = num; params->rate_den = den; } return err; } /** |
1c85cc644 ALSA: kernel docs... |
1355 |
* snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936e [ALSA] Fix DocBoo... |
1356 1357 1358 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the ratdens constraint |
877211f5e [ALSA] Remove xxx... |
1359 |
* @r: struct snd_ratdens constriants |
eb7c06e8e ALSA: add/change ... |
1360 1361 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1362 |
*/ |
877211f5e [ALSA] Remove xxx... |
1363 |
int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1364 1365 |
unsigned int cond, snd_pcm_hw_param_t var, |
877211f5e [ALSA] Remove xxx... |
1366 |
struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4c Linux-2.6.12-rc2 |
1367 1368 1369 1370 1371 |
{ return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_ratdens, r, var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1372 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
877211f5e [ALSA] Remove xxx... |
1373 1374 |
static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4c Linux-2.6.12-rc2 |
1375 1376 1377 1378 |
{ unsigned int l = (unsigned long) rule->private; int width = l & 0xffff; unsigned int msbits = l >> 16; |
877211f5e [ALSA] Remove xxx... |
1379 |
struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
8ef9df55a ALSA: Add support... |
1380 1381 1382 1383 1384 1385 |
if (!snd_interval_single(i)) return 0; if ((snd_interval_value(i) == width) || (width == 0 && snd_interval_value(i) > msbits)) |
19f52fae5 ALSA: Fix handlin... |
1386 |
params->msbits = min_not_zero(params->msbits, msbits); |
8ef9df55a ALSA: Add support... |
1387 |
|
1da177e4c Linux-2.6.12-rc2 |
1388 1389 1390 1391 |
return 0; } /** |
1c85cc644 ALSA: kernel docs... |
1392 |
* snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936e [ALSA] Fix DocBoo... |
1393 1394 1395 1396 |
* @runtime: PCM runtime instance * @cond: condition bits * @width: sample bits width * @msbits: msbits width |
eb7c06e8e ALSA: add/change ... |
1397 |
* |
8ef9df55a ALSA: Add support... |
1398 1399 1400 1401 1402 |
* This constraint will set the number of most significant bits (msbits) if a * sample format with the specified width has been select. If width is set to 0 * the msbits will be set for any sample format with a width larger than the * specified msbits. * |
eb7c06e8e ALSA: add/change ... |
1403 |
* Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1404 |
*/ |
877211f5e [ALSA] Remove xxx... |
1405 |
int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 |
unsigned int cond, unsigned int width, unsigned int msbits) { unsigned long l = (msbits << 16) | width; return snd_pcm_hw_rule_add(runtime, cond, -1, snd_pcm_hw_rule_msbits, (void*) l, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1416 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
877211f5e [ALSA] Remove xxx... |
1417 1418 |
static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4c Linux-2.6.12-rc2 |
1419 1420 |
{ unsigned long step = (unsigned long) rule->private; |
0f519b622 ALSA: pcm: snd_in... |
1421 |
return snd_interval_step(hw_param_interval(params, rule->var), step); |
1da177e4c Linux-2.6.12-rc2 |
1422 1423 1424 |
} /** |
1c85cc644 ALSA: kernel docs... |
1425 |
* snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936e [ALSA] Fix DocBoo... |
1426 1427 1428 1429 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the step constraint * @step: step size |
eb7c06e8e ALSA: add/change ... |
1430 1431 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1432 |
*/ |
877211f5e [ALSA] Remove xxx... |
1433 |
int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1434 1435 1436 1437 1438 1439 1440 1441 |
unsigned int cond, snd_pcm_hw_param_t var, unsigned long step) { return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_step, (void *) step, var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1442 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
877211f5e [ALSA] Remove xxx... |
1443 |
static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4c Linux-2.6.12-rc2 |
1444 |
{ |
67c393172 [ALSA] pcm_lib: f... |
1445 |
static unsigned int pow2_sizes[] = { |
1da177e4c Linux-2.6.12-rc2 |
1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 |
1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 }; return snd_interval_list(hw_param_interval(params, rule->var), ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); } /** |
1c85cc644 ALSA: kernel docs... |
1456 |
* snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936e [ALSA] Fix DocBoo... |
1457 1458 1459 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the power-of-2 constraint |
eb7c06e8e ALSA: add/change ... |
1460 1461 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1462 |
*/ |
877211f5e [ALSA] Remove xxx... |
1463 |
int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1464 1465 1466 1467 1468 1469 1470 |
unsigned int cond, snd_pcm_hw_param_t var) { return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_pow2, NULL, var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1471 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
d5b702a64 ALSA: pcm: add sn... |
1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 |
static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; struct snd_interval *rate; rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); return snd_interval_list(rate, 1, &base_rate, 0); } /** * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling * @runtime: PCM runtime instance * @base_rate: the rate at which the hardware does not resample |
eb7c06e8e ALSA: add/change ... |
1486 1487 |
* * Return: Zero if successful, or a negative error code on failure. |
d5b702a64 ALSA: pcm: add sn... |
1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 |
*/ int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, unsigned int base_rate) { return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, SNDRV_PCM_HW_PARAM_RATE, snd_pcm_hw_rule_noresample_func, (void *)(uintptr_t)base_rate, SNDRV_PCM_HW_PARAM_RATE, -1); } EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); |
877211f5e [ALSA] Remove xxx... |
1499 |
static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f72 [ALSA] sound/core... |
1500 |
snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 |
{ if (hw_is_mask(var)) { snd_mask_any(hw_param_mask(params, var)); params->cmask |= 1 << var; params->rmask |= 1 << var; return; } if (hw_is_interval(var)) { snd_interval_any(hw_param_interval(params, var)); params->cmask |= 1 << var; params->rmask |= 1 << var; return; } snd_BUG(); } |
877211f5e [ALSA] Remove xxx... |
1516 |
void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4c Linux-2.6.12-rc2 |
1517 1518 1519 1520 1521 1522 1523 1524 1525 |
{ unsigned int k; memset(params, 0, sizeof(*params)); for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) _snd_pcm_hw_param_any(params, k); for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) _snd_pcm_hw_param_any(params, k); params->info = ~0U; } |
e88e8ae63 [ALSA] Move OSS-s... |
1526 |
EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4c Linux-2.6.12-rc2 |
1527 1528 |
/** |
1c85cc644 ALSA: kernel docs... |
1529 |
* snd_pcm_hw_param_value - return @params field @var value |
df8db936e [ALSA] Fix DocBoo... |
1530 1531 |
* @params: the hw_params instance * @var: parameter to retrieve |
1c85cc644 ALSA: kernel docs... |
1532 |
* @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4c Linux-2.6.12-rc2 |
1533 |
* |
eb7c06e8e ALSA: add/change ... |
1534 1535 |
* Return: The value for field @var if it's fixed in configuration space * defined by @params. -%EINVAL otherwise. |
1da177e4c Linux-2.6.12-rc2 |
1536 |
*/ |
e88e8ae63 [ALSA] Move OSS-s... |
1537 1538 |
int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, int *dir) |
1da177e4c Linux-2.6.12-rc2 |
1539 1540 |
{ if (hw_is_mask(var)) { |
877211f5e [ALSA] Remove xxx... |
1541 |
const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4c Linux-2.6.12-rc2 |
1542 1543 1544 1545 1546 1547 1548 |
if (!snd_mask_single(mask)) return -EINVAL; if (dir) *dir = 0; return snd_mask_value(mask); } if (hw_is_interval(var)) { |
877211f5e [ALSA] Remove xxx... |
1549 |
const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4c Linux-2.6.12-rc2 |
1550 1551 1552 1553 1554 1555 |
if (!snd_interval_single(i)) return -EINVAL; if (dir) *dir = i->openmin; return snd_interval_value(i); } |
1da177e4c Linux-2.6.12-rc2 |
1556 1557 |
return -EINVAL; } |
e88e8ae63 [ALSA] Move OSS-s... |
1558 |
EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4c Linux-2.6.12-rc2 |
1559 |
|
877211f5e [ALSA] Remove xxx... |
1560 |
void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4c Linux-2.6.12-rc2 |
1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 |
snd_pcm_hw_param_t var) { if (hw_is_mask(var)) { snd_mask_none(hw_param_mask(params, var)); params->cmask |= 1 << var; params->rmask |= 1 << var; } else if (hw_is_interval(var)) { snd_interval_none(hw_param_interval(params, var)); params->cmask |= 1 << var; params->rmask |= 1 << var; } else { snd_BUG(); } } |
e88e8ae63 [ALSA] Move OSS-s... |
1575 |
EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4c Linux-2.6.12-rc2 |
1576 |
|
877211f5e [ALSA] Remove xxx... |
1577 |
static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f72 [ALSA] sound/core... |
1578 |
snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1579 1580 1581 1582 1583 1584 |
{ int changed; if (hw_is_mask(var)) changed = snd_mask_refine_first(hw_param_mask(params, var)); else if (hw_is_interval(var)) changed = snd_interval_refine_first(hw_param_interval(params, var)); |
2f4ca8e5c [ALSA] Clean up u... |
1585 |
else |
1da177e4c Linux-2.6.12-rc2 |
1586 |
return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1587 1588 1589 1590 1591 1592 1593 1594 1595 |
if (changed) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } /** |
1c85cc644 ALSA: kernel docs... |
1596 |
* snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936e [ALSA] Fix DocBoo... |
1597 1598 1599 |
* @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve |
1c85cc644 ALSA: kernel docs... |
1600 |
* @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4c Linux-2.6.12-rc2 |
1601 |
* |
1c85cc644 ALSA: kernel docs... |
1602 |
* Inside configuration space defined by @params remove from @var all |
1da177e4c Linux-2.6.12-rc2 |
1603 |
* values > minimum. Reduce configuration space accordingly. |
eb7c06e8e ALSA: add/change ... |
1604 1605 |
* * Return: The minimum, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1606 |
*/ |
e88e8ae63 [ALSA] Move OSS-s... |
1607 1608 1609 |
int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, int *dir) |
1da177e4c Linux-2.6.12-rc2 |
1610 1611 1612 1613 1614 1615 |
{ int changed = _snd_pcm_hw_param_first(params, var); if (changed < 0) return changed; if (params->rmask) { int err = snd_pcm_hw_refine(pcm, params); |
7eaa943c8 ALSA: Kill snd_as... |
1616 1617 |
if (snd_BUG_ON(err < 0)) return err; |
1da177e4c Linux-2.6.12-rc2 |
1618 1619 1620 |
} return snd_pcm_hw_param_value(params, var, dir); } |
e88e8ae63 [ALSA] Move OSS-s... |
1621 |
EXPORT_SYMBOL(snd_pcm_hw_param_first); |
877211f5e [ALSA] Remove xxx... |
1622 |
static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f72 [ALSA] sound/core... |
1623 |
snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1624 1625 1626 1627 1628 1629 |
{ int changed; if (hw_is_mask(var)) changed = snd_mask_refine_last(hw_param_mask(params, var)); else if (hw_is_interval(var)) changed = snd_interval_refine_last(hw_param_interval(params, var)); |
2f4ca8e5c [ALSA] Clean up u... |
1630 |
else |
1da177e4c Linux-2.6.12-rc2 |
1631 |
return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1632 1633 1634 1635 1636 1637 1638 1639 1640 |
if (changed) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } /** |
1c85cc644 ALSA: kernel docs... |
1641 |
* snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936e [ALSA] Fix DocBoo... |
1642 1643 1644 |
* @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve |
1c85cc644 ALSA: kernel docs... |
1645 |
* @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4c Linux-2.6.12-rc2 |
1646 |
* |
1c85cc644 ALSA: kernel docs... |
1647 |
* Inside configuration space defined by @params remove from @var all |
1da177e4c Linux-2.6.12-rc2 |
1648 |
* values < maximum. Reduce configuration space accordingly. |
eb7c06e8e ALSA: add/change ... |
1649 1650 |
* * Return: The maximum, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1651 |
*/ |
e88e8ae63 [ALSA] Move OSS-s... |
1652 1653 1654 |
int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var, int *dir) |
1da177e4c Linux-2.6.12-rc2 |
1655 1656 1657 1658 1659 1660 |
{ int changed = _snd_pcm_hw_param_last(params, var); if (changed < 0) return changed; if (params->rmask) { int err = snd_pcm_hw_refine(pcm, params); |
7eaa943c8 ALSA: Kill snd_as... |
1661 1662 |
if (snd_BUG_ON(err < 0)) return err; |
1da177e4c Linux-2.6.12-rc2 |
1663 1664 1665 |
} return snd_pcm_hw_param_value(params, var, dir); } |
e88e8ae63 [ALSA] Move OSS-s... |
1666 |
EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4c Linux-2.6.12-rc2 |
1667 1668 |
/** |
1c85cc644 ALSA: kernel docs... |
1669 |
* snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936e [ALSA] Fix DocBoo... |
1670 1671 |
* @pcm: PCM instance * @params: the hw_params instance |
1da177e4c Linux-2.6.12-rc2 |
1672 |
* |
1c85cc644 ALSA: kernel docs... |
1673 |
* Choose one configuration from configuration space defined by @params. |
1da177e4c Linux-2.6.12-rc2 |
1674 1675 1676 |
* The configuration chosen is that obtained fixing in this order: * first access, first format, first subformat, min channels, * min rate, min period time, max buffer size, min tick time |
eb7c06e8e ALSA: add/change ... |
1677 1678 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1679 |
*/ |
2f4ca8e5c [ALSA] Clean up u... |
1680 1681 |
int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params) |
1da177e4c Linux-2.6.12-rc2 |
1682 |
{ |
2f4ca8e5c [ALSA] Clean up u... |
1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 |
static int vars[] = { SNDRV_PCM_HW_PARAM_ACCESS, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT, SNDRV_PCM_HW_PARAM_CHANNELS, SNDRV_PCM_HW_PARAM_RATE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_TICK_TIME, -1 }; int err, *v; |
1da177e4c Linux-2.6.12-rc2 |
1695 |
|
2f4ca8e5c [ALSA] Clean up u... |
1696 1697 1698 1699 1700 |
for (v = vars; *v != -1; v++) { if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) err = snd_pcm_hw_param_first(pcm, params, *v, NULL); else err = snd_pcm_hw_param_last(pcm, params, *v, NULL); |
7eaa943c8 ALSA: Kill snd_as... |
1701 1702 |
if (snd_BUG_ON(err < 0)) return err; |
2f4ca8e5c [ALSA] Clean up u... |
1703 |
} |
1da177e4c Linux-2.6.12-rc2 |
1704 1705 |
return 0; } |
877211f5e [ALSA] Remove xxx... |
1706 |
static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1707 1708 |
void *arg) { |
877211f5e [ALSA] Remove xxx... |
1709 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1710 1711 1712 1713 1714 |
unsigned long flags; snd_pcm_stream_lock_irqsave(substream, flags); if (snd_pcm_running(substream) && snd_pcm_update_hw_ptr(substream) >= 0) runtime->status->hw_ptr %= runtime->buffer_size; |
0e8014d77 ALSA: core: keep ... |
1715 |
else { |
1da177e4c Linux-2.6.12-rc2 |
1716 |
runtime->status->hw_ptr = 0; |
0e8014d77 ALSA: core: keep ... |
1717 1718 |
runtime->hw_ptr_wrap = 0; } |
1da177e4c Linux-2.6.12-rc2 |
1719 1720 1721 |
snd_pcm_stream_unlock_irqrestore(substream, flags); return 0; } |
877211f5e [ALSA] Remove xxx... |
1722 |
static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1723 1724 |
void *arg) { |
877211f5e [ALSA] Remove xxx... |
1725 1726 |
struct snd_pcm_channel_info *info = arg; struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 |
int width; if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { info->offset = -1; return 0; } width = snd_pcm_format_physical_width(runtime->format); if (width < 0) return width; info->offset = 0; switch (runtime->access) { case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: case SNDRV_PCM_ACCESS_RW_INTERLEAVED: info->first = info->channel * width; info->step = runtime->channels * width; break; case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: { size_t size = runtime->dma_bytes / runtime->channels; info->first = info->channel * size * 8; info->step = width; break; } default: snd_BUG(); break; } return 0; } |
8bea869c5 ALSA: PCM midleve... |
1756 1757 1758 1759 1760 |
static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, void *arg) { struct snd_pcm_hw_params *params = arg; snd_pcm_format_t format; |
a9960e6a2 ALSA: pcm: fix fi... |
1761 1762 |
int channels; ssize_t frame_size; |
8bea869c5 ALSA: PCM midleve... |
1763 1764 1765 1766 1767 |
params->fifo_size = substream->runtime->hw.fifo_size; if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { format = params_format(params); channels = params_channels(params); |
a9960e6a2 ALSA: pcm: fix fi... |
1768 1769 1770 |
frame_size = snd_pcm_format_size(format, channels); if (frame_size > 0) params->fifo_size /= (unsigned)frame_size; |
8bea869c5 ALSA: PCM midleve... |
1771 1772 1773 |
} return 0; } |
1da177e4c Linux-2.6.12-rc2 |
1774 1775 1776 1777 1778 1779 1780 1781 1782 |
/** * snd_pcm_lib_ioctl - a generic PCM ioctl callback * @substream: the pcm substream instance * @cmd: ioctl command * @arg: ioctl argument * * Processes the generic ioctl commands for PCM. * Can be passed as the ioctl callback for PCM ops. * |
eb7c06e8e ALSA: add/change ... |
1783 |
* Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1784 |
*/ |
877211f5e [ALSA] Remove xxx... |
1785 |
int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1786 1787 1788 1789 1790 1791 1792 1793 1794 |
unsigned int cmd, void *arg) { switch (cmd) { case SNDRV_PCM_IOCTL1_INFO: return 0; case SNDRV_PCM_IOCTL1_RESET: return snd_pcm_lib_ioctl_reset(substream, arg); case SNDRV_PCM_IOCTL1_CHANNEL_INFO: return snd_pcm_lib_ioctl_channel_info(substream, arg); |
8bea869c5 ALSA: PCM midleve... |
1795 1796 |
case SNDRV_PCM_IOCTL1_FIFO_SIZE: return snd_pcm_lib_ioctl_fifo_size(substream, arg); |
1da177e4c Linux-2.6.12-rc2 |
1797 1798 1799 |
} return -ENXIO; } |
e88e8ae63 [ALSA] Move OSS-s... |
1800 |
EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1da177e4c Linux-2.6.12-rc2 |
1801 1802 1803 1804 1805 1806 |
/** * snd_pcm_period_elapsed - update the pcm status for the next period * @substream: the pcm substream instance * * This function is called from the interrupt handler when the * PCM has processed the period size. It will update the current |
31e8960b3 [ALSA] Remove PCM... |
1807 |
* pointer, wake up sleepers, etc. |
1da177e4c Linux-2.6.12-rc2 |
1808 1809 1810 1811 |
* * Even if more than one periods have elapsed since the last call, you * have to call this only once. */ |
877211f5e [ALSA] Remove xxx... |
1812 |
void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
1813 |
{ |
877211f5e [ALSA] Remove xxx... |
1814 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
1815 |
unsigned long flags; |
7eaa943c8 ALSA: Kill snd_as... |
1816 1817 |
if (PCM_RUNTIME_CHECK(substream)) return; |
1da177e4c Linux-2.6.12-rc2 |
1818 |
runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1819 1820 1821 1822 1823 1824 |
if (runtime->transfer_ack_begin) runtime->transfer_ack_begin(substream); snd_pcm_stream_lock_irqsave(substream, flags); if (!snd_pcm_running(substream) || |
f240406ba ALSA: pcm_lib - c... |
1825 |
snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4c Linux-2.6.12-rc2 |
1826 1827 1828 1829 |
goto _end; if (substream->timer_running) snd_timer_interrupt(substream->timer, 1); |
1da177e4c Linux-2.6.12-rc2 |
1830 1831 1832 1833 1834 1835 |
_end: snd_pcm_stream_unlock_irqrestore(substream, flags); if (runtime->transfer_ack_end) runtime->transfer_ack_end(substream); kill_fasync(&runtime->fasync, SIGIO, POLL_IN); } |
e88e8ae63 [ALSA] Move OSS-s... |
1836 |
EXPORT_SYMBOL(snd_pcm_period_elapsed); |
130755108 [ALSA] PCM - clea... |
1837 1838 1839 1840 1841 1842 |
/* * Wait until avail_min data becomes available * Returns a negative error code if any error occurs during operation. * The available space is stored on availp. When err = 0 and avail = 0 * on the capture stream, it indicates the stream is in DRAINING state. */ |
5daeba34d ALSA: pcm_lib: av... |
1843 |
static int wait_for_avail(struct snd_pcm_substream *substream, |
130755108 [ALSA] PCM - clea... |
1844 1845 1846 1847 1848 1849 1850 |
snd_pcm_uframes_t *availp) { struct snd_pcm_runtime *runtime = substream->runtime; int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; wait_queue_t wait; int err = 0; snd_pcm_uframes_t avail = 0; |
f2b3614ce ALSA: PCM - Don't... |
1851 |
long wait_time, tout; |
763437a9e ALSA: pcm - fix r... |
1852 1853 1854 |
init_waitqueue_entry(&wait, current); set_current_state(TASK_INTERRUPTIBLE); add_wait_queue(&runtime->tsleep, &wait); |
f2b3614ce ALSA: PCM - Don't... |
1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 |
if (runtime->no_period_wakeup) wait_time = MAX_SCHEDULE_TIMEOUT; else { wait_time = 10; if (runtime->rate) { long t = runtime->period_size * 2 / runtime->rate; wait_time = max(t, wait_time); } wait_time = msecs_to_jiffies(wait_time * 1000); } |
763437a9e ALSA: pcm - fix r... |
1865 |
|
130755108 [ALSA] PCM - clea... |
1866 1867 1868 1869 1870 |
for (;;) { if (signal_pending(current)) { err = -ERESTARTSYS; break; } |
763437a9e ALSA: pcm - fix r... |
1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 |
/* * We need to check if space became available already * (and thus the wakeup happened already) first to close * the race of space already having become available. * This check must happen after been added to the waitqueue * and having current state be INTERRUPTIBLE. */ if (is_playback) avail = snd_pcm_playback_avail(runtime); else avail = snd_pcm_capture_avail(runtime); if (avail >= runtime->twake) break; |
130755108 [ALSA] PCM - clea... |
1885 |
snd_pcm_stream_unlock_irq(substream); |
763437a9e ALSA: pcm - fix r... |
1886 1887 |
tout = schedule_timeout(wait_time); |
130755108 [ALSA] PCM - clea... |
1888 |
snd_pcm_stream_lock_irq(substream); |
763437a9e ALSA: pcm - fix r... |
1889 |
set_current_state(TASK_INTERRUPTIBLE); |
130755108 [ALSA] PCM - clea... |
1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 |
switch (runtime->status->state) { case SNDRV_PCM_STATE_SUSPENDED: err = -ESTRPIPE; goto _endloop; case SNDRV_PCM_STATE_XRUN: err = -EPIPE; goto _endloop; case SNDRV_PCM_STATE_DRAINING: if (is_playback) err = -EPIPE; else avail = 0; /* indicate draining */ goto _endloop; case SNDRV_PCM_STATE_OPEN: case SNDRV_PCM_STATE_SETUP: case SNDRV_PCM_STATE_DISCONNECTED: err = -EBADFD; goto _endloop; |
ed697e1aa ALSA: Add SNDRV_P... |
1908 1909 |
case SNDRV_PCM_STATE_PAUSED: continue; |
130755108 [ALSA] PCM - clea... |
1910 1911 |
} if (!tout) { |
09e56df8b ALSA: pcm: Use st... |
1912 1913 1914 1915 |
pcm_dbg(substream->pcm, "%s write error (DMA or IRQ trouble?) ", is_playback ? "playback" : "capture"); |
130755108 [ALSA] PCM - clea... |
1916 1917 1918 |
err = -EIO; break; } |
130755108 [ALSA] PCM - clea... |
1919 1920 |
} _endloop: |
763437a9e ALSA: pcm - fix r... |
1921 |
set_current_state(TASK_RUNNING); |
c91a988dc ALSA: pcm_core: F... |
1922 |
remove_wait_queue(&runtime->tsleep, &wait); |
130755108 [ALSA] PCM - clea... |
1923 1924 1925 1926 |
*availp = avail; return err; } |
877211f5e [ALSA] Remove xxx... |
1927 |
static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1928 1929 1930 1931 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
1932 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1933 1934 1935 1936 1937 1938 1939 |
int err; char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); if (substream->ops->copy) { if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) return err; } else { char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); |
1da177e4c Linux-2.6.12-rc2 |
1940 1941 1942 1943 1944 1945 |
if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) return -EFAULT; } return 0; } |
877211f5e [ALSA] Remove xxx... |
1946 |
typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4c Linux-2.6.12-rc2 |
1947 1948 |
unsigned long data, unsigned int off, snd_pcm_uframes_t size); |
877211f5e [ALSA] Remove xxx... |
1949 |
static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1950 1951 1952 1953 1954 |
unsigned long data, snd_pcm_uframes_t size, int nonblock, transfer_f transfer) { |
877211f5e [ALSA] Remove xxx... |
1955 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1956 1957 |
snd_pcm_uframes_t xfer = 0; snd_pcm_uframes_t offset = 0; |
0910c216f ALSA: pcm - Optim... |
1958 |
snd_pcm_uframes_t avail; |
1da177e4c Linux-2.6.12-rc2 |
1959 1960 1961 1962 |
int err = 0; if (size == 0) return 0; |
1da177e4c Linux-2.6.12-rc2 |
1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 |
snd_pcm_stream_lock_irq(substream); switch (runtime->status->state) { case SNDRV_PCM_STATE_PREPARED: case SNDRV_PCM_STATE_RUNNING: case SNDRV_PCM_STATE_PAUSED: break; case SNDRV_PCM_STATE_XRUN: err = -EPIPE; goto _end_unlock; case SNDRV_PCM_STATE_SUSPENDED: err = -ESTRPIPE; goto _end_unlock; default: err = -EBADFD; goto _end_unlock; } |
5daeba34d ALSA: pcm_lib: av... |
1980 |
runtime->twake = runtime->control->avail_min ? : 1; |
0910c216f ALSA: pcm - Optim... |
1981 1982 1983 |
if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) snd_pcm_update_hw_ptr(substream); avail = snd_pcm_playback_avail(runtime); |
1da177e4c Linux-2.6.12-rc2 |
1984 1985 |
while (size > 0) { snd_pcm_uframes_t frames, appl_ptr, appl_ofs; |
1da177e4c Linux-2.6.12-rc2 |
1986 |
snd_pcm_uframes_t cont; |
130755108 [ALSA] PCM - clea... |
1987 |
if (!avail) { |
1da177e4c Linux-2.6.12-rc2 |
1988 1989 1990 1991 |
if (nonblock) { err = -EAGAIN; goto _end_unlock; } |
5daeba34d ALSA: pcm_lib: av... |
1992 1993 1994 |
runtime->twake = min_t(snd_pcm_uframes_t, size, runtime->control->avail_min ? : 1); err = wait_for_avail(substream, &avail); |
130755108 [ALSA] PCM - clea... |
1995 |
if (err < 0) |
443feb882 [ALSA] ALSA's str... |
1996 |
goto _end_unlock; |
1da177e4c Linux-2.6.12-rc2 |
1997 |
} |
1da177e4c Linux-2.6.12-rc2 |
1998 1999 2000 2001 |
frames = size > avail ? avail : size; cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; if (frames > cont) frames = cont; |
7eaa943c8 ALSA: Kill snd_as... |
2002 |
if (snd_BUG_ON(!frames)) { |
c91a988dc ALSA: pcm_core: F... |
2003 |
runtime->twake = 0; |
7eaa943c8 ALSA: Kill snd_as... |
2004 2005 2006 |
snd_pcm_stream_unlock_irq(substream); return -EINVAL; } |
1da177e4c Linux-2.6.12-rc2 |
2007 2008 2009 |
appl_ptr = runtime->control->appl_ptr; appl_ofs = appl_ptr % runtime->buffer_size; snd_pcm_stream_unlock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
2010 |
err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4c Linux-2.6.12-rc2 |
2011 |
snd_pcm_stream_lock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
2012 2013 |
if (err < 0) goto _end_unlock; |
1da177e4c Linux-2.6.12-rc2 |
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 |
switch (runtime->status->state) { case SNDRV_PCM_STATE_XRUN: err = -EPIPE; goto _end_unlock; case SNDRV_PCM_STATE_SUSPENDED: err = -ESTRPIPE; goto _end_unlock; default: break; } appl_ptr += frames; if (appl_ptr >= runtime->boundary) appl_ptr -= runtime->boundary; runtime->control->appl_ptr = appl_ptr; if (substream->ops->ack) substream->ops->ack(substream); offset += frames; size -= frames; xfer += frames; |
0910c216f ALSA: pcm - Optim... |
2034 |
avail -= frames; |
1da177e4c Linux-2.6.12-rc2 |
2035 2036 2037 2038 2039 2040 |
if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { err = snd_pcm_start(substream); if (err < 0) goto _end_unlock; } |
1da177e4c Linux-2.6.12-rc2 |
2041 2042 |
} _end_unlock: |
c91a988dc ALSA: pcm_core: F... |
2043 |
runtime->twake = 0; |
1250932e4 ALSA: pcm_lib - o... |
2044 2045 |
if (xfer > 0 && err >= 0) snd_pcm_update_state(substream, runtime); |
1da177e4c Linux-2.6.12-rc2 |
2046 |
snd_pcm_stream_unlock_irq(substream); |
1da177e4c Linux-2.6.12-rc2 |
2047 2048 |
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; } |
7eaa943c8 ALSA: Kill snd_as... |
2049 2050 |
/* sanity-check for read/write methods */ static int pcm_sanity_check(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
2051 |
{ |
877211f5e [ALSA] Remove xxx... |
2052 |
struct snd_pcm_runtime *runtime; |
7eaa943c8 ALSA: Kill snd_as... |
2053 2054 |
if (PCM_RUNTIME_CHECK(substream)) return -ENXIO; |
1da177e4c Linux-2.6.12-rc2 |
2055 |
runtime = substream->runtime; |
7eaa943c8 ALSA: Kill snd_as... |
2056 2057 |
if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
2058 2059 |
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) return -EBADFD; |
7eaa943c8 ALSA: Kill snd_as... |
2060 2061 2062 2063 2064 2065 2066 2067 |
return 0; } snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) { struct snd_pcm_runtime *runtime; int nonblock; int err; |
1da177e4c Linux-2.6.12-rc2 |
2068 |
|
7eaa943c8 ALSA: Kill snd_as... |
2069 2070 2071 2072 |
err = pcm_sanity_check(substream); if (err < 0) return err; runtime = substream->runtime; |
0df63e44c [ALSA] Add O_APPE... |
2073 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2074 2075 2076 2077 2078 2079 2080 |
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && runtime->channels > 1) return -EINVAL; return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_write_transfer); } |
e88e8ae63 [ALSA] Move OSS-s... |
2081 |
EXPORT_SYMBOL(snd_pcm_lib_write); |
877211f5e [ALSA] Remove xxx... |
2082 |
static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2083 2084 2085 2086 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2087 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2088 2089 2090 2091 2092 |
int err; void __user **bufs = (void __user **)data; int channels = runtime->channels; int c; if (substream->ops->copy) { |
7eaa943c8 ALSA: Kill snd_as... |
2093 2094 |
if (snd_BUG_ON(!substream->ops->silence)) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 |
for (c = 0; c < channels; ++c, ++bufs) { if (*bufs == NULL) { if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) return err; } else { char __user *buf = *bufs + samples_to_bytes(runtime, off); if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) return err; } } } else { /* default transfer behaviour */ size_t dma_csize = runtime->dma_bytes / channels; |
1da177e4c Linux-2.6.12-rc2 |
2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 |
for (c = 0; c < channels; ++c, ++bufs) { char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); if (*bufs == NULL) { snd_pcm_format_set_silence(runtime->format, hwbuf, frames); } else { char __user *buf = *bufs + samples_to_bytes(runtime, off); if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) return -EFAULT; } } } return 0; } |
877211f5e [ALSA] Remove xxx... |
2122 |
snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2123 2124 2125 |
void __user **bufs, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2126 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
2127 |
int nonblock; |
7eaa943c8 ALSA: Kill snd_as... |
2128 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
2129 |
|
7eaa943c8 ALSA: Kill snd_as... |
2130 2131 2132 |
err = pcm_sanity_check(substream); if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
2133 |
runtime = substream->runtime; |
0df63e44c [ALSA] Add O_APPE... |
2134 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2135 2136 2137 2138 2139 2140 |
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) return -EINVAL; return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_writev_transfer); } |
e88e8ae63 [ALSA] Move OSS-s... |
2141 |
EXPORT_SYMBOL(snd_pcm_lib_writev); |
877211f5e [ALSA] Remove xxx... |
2142 |
static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2143 2144 2145 2146 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2147 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2148 2149 2150 2151 2152 2153 2154 |
int err; char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); if (substream->ops->copy) { if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) return err; } else { char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); |
1da177e4c Linux-2.6.12-rc2 |
2155 2156 2157 2158 2159 |
if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) return -EFAULT; } return 0; } |
877211f5e [ALSA] Remove xxx... |
2160 |
static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2161 2162 2163 2164 2165 |
unsigned long data, snd_pcm_uframes_t size, int nonblock, transfer_f transfer) { |
877211f5e [ALSA] Remove xxx... |
2166 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2167 2168 |
snd_pcm_uframes_t xfer = 0; snd_pcm_uframes_t offset = 0; |
0910c216f ALSA: pcm - Optim... |
2169 |
snd_pcm_uframes_t avail; |
1da177e4c Linux-2.6.12-rc2 |
2170 2171 2172 2173 |
int err = 0; if (size == 0) return 0; |
1da177e4c Linux-2.6.12-rc2 |
2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 |
snd_pcm_stream_lock_irq(substream); switch (runtime->status->state) { case SNDRV_PCM_STATE_PREPARED: if (size >= runtime->start_threshold) { err = snd_pcm_start(substream); if (err < 0) goto _end_unlock; } break; case SNDRV_PCM_STATE_DRAINING: case SNDRV_PCM_STATE_RUNNING: case SNDRV_PCM_STATE_PAUSED: break; case SNDRV_PCM_STATE_XRUN: err = -EPIPE; goto _end_unlock; case SNDRV_PCM_STATE_SUSPENDED: err = -ESTRPIPE; goto _end_unlock; default: err = -EBADFD; goto _end_unlock; } |
5daeba34d ALSA: pcm_lib: av... |
2198 |
runtime->twake = runtime->control->avail_min ? : 1; |
0910c216f ALSA: pcm - Optim... |
2199 2200 2201 |
if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) snd_pcm_update_hw_ptr(substream); avail = snd_pcm_capture_avail(runtime); |
1da177e4c Linux-2.6.12-rc2 |
2202 2203 |
while (size > 0) { snd_pcm_uframes_t frames, appl_ptr, appl_ofs; |
1da177e4c Linux-2.6.12-rc2 |
2204 |
snd_pcm_uframes_t cont; |
130755108 [ALSA] PCM - clea... |
2205 2206 2207 2208 |
if (!avail) { if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1da177e4c Linux-2.6.12-rc2 |
2209 2210 |
goto _end_unlock; } |
1da177e4c Linux-2.6.12-rc2 |
2211 2212 2213 2214 |
if (nonblock) { err = -EAGAIN; goto _end_unlock; } |
5daeba34d ALSA: pcm_lib: av... |
2215 2216 2217 |
runtime->twake = min_t(snd_pcm_uframes_t, size, runtime->control->avail_min ? : 1); err = wait_for_avail(substream, &avail); |
130755108 [ALSA] PCM - clea... |
2218 |
if (err < 0) |
443feb882 [ALSA] ALSA's str... |
2219 |
goto _end_unlock; |
130755108 [ALSA] PCM - clea... |
2220 2221 |
if (!avail) continue; /* draining */ |
1da177e4c Linux-2.6.12-rc2 |
2222 |
} |
1da177e4c Linux-2.6.12-rc2 |
2223 2224 2225 2226 |
frames = size > avail ? avail : size; cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; if (frames > cont) frames = cont; |
7eaa943c8 ALSA: Kill snd_as... |
2227 |
if (snd_BUG_ON(!frames)) { |
c91a988dc ALSA: pcm_core: F... |
2228 |
runtime->twake = 0; |
7eaa943c8 ALSA: Kill snd_as... |
2229 2230 2231 |
snd_pcm_stream_unlock_irq(substream); return -EINVAL; } |
1da177e4c Linux-2.6.12-rc2 |
2232 2233 2234 |
appl_ptr = runtime->control->appl_ptr; appl_ofs = appl_ptr % runtime->buffer_size; snd_pcm_stream_unlock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
2235 |
err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4c Linux-2.6.12-rc2 |
2236 |
snd_pcm_stream_lock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
2237 2238 |
if (err < 0) goto _end_unlock; |
1da177e4c Linux-2.6.12-rc2 |
2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 |
switch (runtime->status->state) { case SNDRV_PCM_STATE_XRUN: err = -EPIPE; goto _end_unlock; case SNDRV_PCM_STATE_SUSPENDED: err = -ESTRPIPE; goto _end_unlock; default: break; } appl_ptr += frames; if (appl_ptr >= runtime->boundary) appl_ptr -= runtime->boundary; runtime->control->appl_ptr = appl_ptr; if (substream->ops->ack) substream->ops->ack(substream); offset += frames; size -= frames; xfer += frames; |
0910c216f ALSA: pcm - Optim... |
2259 |
avail -= frames; |
1da177e4c Linux-2.6.12-rc2 |
2260 2261 |
} _end_unlock: |
c91a988dc ALSA: pcm_core: F... |
2262 |
runtime->twake = 0; |
1250932e4 ALSA: pcm_lib - o... |
2263 2264 |
if (xfer > 0 && err >= 0) snd_pcm_update_state(substream, runtime); |
1da177e4c Linux-2.6.12-rc2 |
2265 |
snd_pcm_stream_unlock_irq(substream); |
1da177e4c Linux-2.6.12-rc2 |
2266 2267 |
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; } |
877211f5e [ALSA] Remove xxx... |
2268 |
snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4c Linux-2.6.12-rc2 |
2269 |
{ |
877211f5e [ALSA] Remove xxx... |
2270 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
2271 |
int nonblock; |
7eaa943c8 ALSA: Kill snd_as... |
2272 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
2273 |
|
7eaa943c8 ALSA: Kill snd_as... |
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err = pcm_sanity_check(substream); if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
2277 |
runtime = substream->runtime; |
0df63e44c [ALSA] Add O_APPE... |
2278 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2279 2280 2281 2282 |
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) return -EINVAL; return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); } |
e88e8ae63 [ALSA] Move OSS-s... |
2283 |
EXPORT_SYMBOL(snd_pcm_lib_read); |
877211f5e [ALSA] Remove xxx... |
2284 |
static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2285 2286 2287 2288 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
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struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
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int err; void __user **bufs = (void __user **)data; int channels = runtime->channels; int c; if (substream->ops->copy) { for (c = 0; c < channels; ++c, ++bufs) { char __user *buf; if (*bufs == NULL) continue; buf = *bufs + samples_to_bytes(runtime, off); if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) return err; } } else { snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; |
1da177e4c Linux-2.6.12-rc2 |
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for (c = 0; c < channels; ++c, ++bufs) { char *hwbuf; char __user *buf; if (*bufs == NULL) continue; hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); buf = *bufs + samples_to_bytes(runtime, off); if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) return -EFAULT; } } return 0; } |
877211f5e [ALSA] Remove xxx... |
2320 |
snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2321 2322 2323 |
void __user **bufs, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2324 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
2325 |
int nonblock; |
7eaa943c8 ALSA: Kill snd_as... |
2326 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
2327 |
|
7eaa943c8 ALSA: Kill snd_as... |
2328 2329 2330 |
err = pcm_sanity_check(substream); if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
2331 |
runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2332 2333 |
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) return -EBADFD; |
0df63e44c [ALSA] Add O_APPE... |
2334 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2335 2336 2337 2338 |
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) return -EINVAL; return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); } |
1da177e4c Linux-2.6.12-rc2 |
2339 |
EXPORT_SYMBOL(snd_pcm_lib_readv); |
2d3391ec0 ALSA: PCM: channe... |
2340 2341 2342 2343 2344 2345 2346 2347 |
/* * standard channel mapping helpers */ /* default channel maps for multi-channel playbacks, up to 8 channels */ const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { { .channels = 1, |
5efbc2610 ALSA: Fix leftove... |
2348 |
.map = { SNDRV_CHMAP_MONO } }, |
2d3391ec0 ALSA: PCM: channe... |
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{ .channels = 2, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, { .channels = 4, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, { .channels = 6, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, { .channels = 8, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, { } }; EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { { .channels = 1, |
5efbc2610 ALSA: Fix leftove... |
2370 |
.map = { SNDRV_CHMAP_MONO } }, |
2d3391ec0 ALSA: PCM: channe... |
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{ .channels = 2, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, { .channels = 4, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, { .channels = 6, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, { .channels = 8, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, { } }; EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) { if (ch > info->max_channels) return false; return !info->channel_mask || (info->channel_mask & (1U << ch)); } static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; uinfo->count = 0; uinfo->count = info->max_channels; uinfo->value.integer.min = 0; uinfo->value.integer.max = SNDRV_CHMAP_LAST; return 0; } /* get callback for channel map ctl element * stores the channel position firstly matching with the current channels */ static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); struct snd_pcm_substream *substream; const struct snd_pcm_chmap_elem *map; if (snd_BUG_ON(!info->chmap)) return -EINVAL; substream = snd_pcm_chmap_substream(info, idx); if (!substream) return -ENODEV; memset(ucontrol->value.integer.value, 0, sizeof(ucontrol->value.integer.value)); if (!substream->runtime) return 0; /* no channels set */ for (map = info->chmap; map->channels; map++) { int i; if (map->channels == substream->runtime->channels && valid_chmap_channels(info, map->channels)) { for (i = 0; i < map->channels; i++) ucontrol->value.integer.value[i] = map->map[i]; return 0; } } return -EINVAL; } /* tlv callback for channel map ctl element * expands the pre-defined channel maps in a form of TLV */ static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, unsigned int size, unsigned int __user *tlv) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); const struct snd_pcm_chmap_elem *map; unsigned int __user *dst; int c, count = 0; if (snd_BUG_ON(!info->chmap)) return -EINVAL; if (size < 8) return -ENOMEM; if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) return -EFAULT; size -= 8; dst = tlv + 2; for (map = info->chmap; map->channels; map++) { int chs_bytes = map->channels * 4; if (!valid_chmap_channels(info, map->channels)) continue; if (size < 8) return -ENOMEM; if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || put_user(chs_bytes, dst + 1)) return -EFAULT; dst += 2; size -= 8; count += 8; if (size < chs_bytes) return -ENOMEM; size -= chs_bytes; count += chs_bytes; for (c = 0; c < map->channels; c++) { if (put_user(map->map[c], dst)) return -EFAULT; dst++; } } if (put_user(count, tlv + 1)) return -EFAULT; return 0; } static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); info->pcm->streams[info->stream].chmap_kctl = NULL; kfree(info); } /** * snd_pcm_add_chmap_ctls - create channel-mapping control elements * @pcm: the assigned PCM instance * @stream: stream direction * @chmap: channel map elements (for query) * @max_channels: the max number of channels for the stream * @private_value: the value passed to each kcontrol's private_value field * @info_ret: store struct snd_pcm_chmap instance if non-NULL * * Create channel-mapping control elements assigned to the given PCM stream(s). |
eb7c06e8e ALSA: add/change ... |
2504 |
* Return: Zero if successful, or a negative error value. |
2d3391ec0 ALSA: PCM: channe... |
2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 |
*/ int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, const struct snd_pcm_chmap_elem *chmap, int max_channels, unsigned long private_value, struct snd_pcm_chmap **info_ret) { struct snd_pcm_chmap *info; struct snd_kcontrol_new knew = { .iface = SNDRV_CTL_ELEM_IFACE_PCM, .access = SNDRV_CTL_ELEM_ACCESS_READ | |
2d3391ec0 ALSA: PCM: channe... |
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SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, .info = pcm_chmap_ctl_info, .get = pcm_chmap_ctl_get, .tlv.c = pcm_chmap_ctl_tlv, }; int err; info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; info->pcm = pcm; info->stream = stream; info->chmap = chmap; info->max_channels = max_channels; if (stream == SNDRV_PCM_STREAM_PLAYBACK) knew.name = "Playback Channel Map"; else knew.name = "Capture Channel Map"; knew.device = pcm->device; knew.count = pcm->streams[stream].substream_count; knew.private_value = private_value; info->kctl = snd_ctl_new1(&knew, info); if (!info->kctl) { kfree(info); return -ENOMEM; } info->kctl->private_free = pcm_chmap_ctl_private_free; err = snd_ctl_add(pcm->card, info->kctl); if (err < 0) return err; pcm->streams[stream].chmap_kctl = info->kctl; if (info_ret) *info_ret = info; return 0; } EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |