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sound/core/pcm_lib.c
61.3 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> #include <sound/info.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/timer.h> /* * 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 */ #define XRUN_DEBUG_PERIODUPDATE (1<<3) /* full period update info */ #define XRUN_DEBUG_HWPTRUPDATE (1<<4) /* full hwptr update info */ |
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#define XRUN_DEBUG_LOG (1<<5) /* show last 10 positions on err */ #define XRUN_DEBUG_LOGONCE (1<<6) /* do above only once */ |
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|
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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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|
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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; 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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snd_printd(KERN_DEBUG "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, fmt, args...) \ do { \ if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
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xrun_log_show(substream); \ |
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if (printk_ratelimit()) { \ snd_printd("PCM: " fmt, ##args); \ } \ dump_stack_on_xrun(substream); \ } \ } while (0) #define XRUN_LOG_CNT 10 struct hwptr_log_entry { |
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unsigned int in_interrupt; |
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unsigned long jiffies; |
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snd_pcm_uframes_t pos; |
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snd_pcm_uframes_t period_size; snd_pcm_uframes_t buffer_size; snd_pcm_uframes_t old_hw_ptr; snd_pcm_uframes_t hw_ptr_base; |
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}; |
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|
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struct snd_pcm_hwptr_log { unsigned int idx; unsigned int hit: 1; struct hwptr_log_entry entries[XRUN_LOG_CNT]; }; static void xrun_log(struct snd_pcm_substream *substream, |
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snd_pcm_uframes_t pos, int in_interrupt) |
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{ struct snd_pcm_runtime *runtime = substream->runtime; struct snd_pcm_hwptr_log *log = runtime->hwptr_log; struct hwptr_log_entry *entry; if (log == NULL) { log = kzalloc(sizeof(*log), GFP_ATOMIC); if (log == NULL) return; runtime->hwptr_log = log; } else { if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) return; |
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} |
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entry = &log->entries[log->idx]; |
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entry->in_interrupt = in_interrupt; |
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entry->jiffies = jiffies; entry->pos = pos; entry->period_size = runtime->period_size; |
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entry->buffer_size = runtime->buffer_size; |
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entry->old_hw_ptr = runtime->status->hw_ptr; entry->hw_ptr_base = runtime->hw_ptr_base; |
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log->idx = (log->idx + 1) % XRUN_LOG_CNT; |
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} |
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static void xrun_log_show(struct snd_pcm_substream *substream) { struct snd_pcm_hwptr_log *log = substream->runtime->hwptr_log; struct hwptr_log_entry *entry; char name[16]; unsigned int idx; int cnt; if (log == NULL) return; if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) return; |
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snd_pcm_debug_name(substream, name, sizeof(name)); |
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for (cnt = 0, idx = log->idx; cnt < XRUN_LOG_CNT; cnt++) { entry = &log->entries[idx]; if (entry->period_size == 0) break; |
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snd_printd("hwptr log: %s: %sj=%lu, pos=%ld/%ld/%ld, " |
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"hwptr=%ld/%ld ", |
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name, entry->in_interrupt ? "[Q] " : "", entry->jiffies, (unsigned long)entry->pos, |
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(unsigned long)entry->period_size, (unsigned long)entry->buffer_size, (unsigned long)entry->old_hw_ptr, |
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(unsigned long)entry->hw_ptr_base); |
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idx++; idx %= XRUN_LOG_CNT; } log->hit = 1; } #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
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#define hw_ptr_error(substream, fmt, args...) do { } while (0) |
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#define xrun_log(substream, pos, in_interrupt) do { } while (0) |
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#define xrun_log_show(substream) do { } while (0) #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 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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|
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old_hw_ptr = runtime->status->hw_ptr; |
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pos = substream->ops->pointer(substream); |
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if (pos == SNDRV_PCM_POS_XRUN) { xrun(substream); return -EPIPE; } |
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if (pos >= runtime->buffer_size) { if (printk_ratelimit()) { char name[16]; |
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snd_pcm_debug_name(substream, name, sizeof(name)); |
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xrun_log_show(substream); snd_printd(KERN_ERR "BUG: %s, pos = %ld, " "buffer size = %ld, period size = %ld ", name, pos, runtime->buffer_size, runtime->period_size); } pos = 0; |
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} |
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pos -= pos % runtime->min_align; if (xrun_debug(substream, XRUN_DEBUG_LOG)) |
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xrun_log(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 */ hdelta = jiffies - runtime->hw_ptr_jiffies; if (hdelta > runtime->hw_ptr_buffer_jiffies/2) { hw_base += runtime->buffer_size; if (hw_base >= runtime->boundary) hw_base = 0; 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; if (hw_base >= runtime->boundary) hw_base = 0; 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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if (xrun_debug(substream, in_interrupt ? XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { char name[16]; |
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snd_pcm_debug_name(substream, name, sizeof(name)); |
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snd_printd("%s_update: %s: pos=%u/%u/%u, " "hwptr=%ld/%ld/%ld/%ld ", in_interrupt ? "period" : "hwptr", name, (unsigned int)pos, (unsigned int)runtime->period_size, (unsigned int)runtime->buffer_size, (unsigned long)delta, (unsigned long)old_hw_ptr, (unsigned long)new_hw_ptr, (unsigned long)runtime->hw_ptr_base); } |
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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. */ jdelta = 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; if (hw_base >= runtime->boundary) hw_base = 0; 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, "Unexpected hw_pointer value %s" "(stream=%i, pos=%ld, new_hw_ptr=%ld, " "old_hw_ptr=%ld) ", in_interrupt ? "[Q] " : "[P]", substream->stream, (long)pos, (long)new_hw_ptr, (long)old_hw_ptr); 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 = jiffies - runtime->hw_ptr_jiffies; if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { delta = jdelta / (((runtime->period_size * HZ) / runtime->rate) + HZ/100); |
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/* move new_hw_ptr according jiffies not pos variable */ new_hw_ptr = old_hw_ptr; |
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436 |
hw_base = delta; |
f240406ba ALSA: pcm_lib - c... |
437 438 439 440 441 442 443 444 445 |
/* 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; if (new_hw_ptr >= runtime->boundary) new_hw_ptr -= runtime->boundary; delta--; } /* align hw_base to buffer_size */ |
bbf6ad139 [ALSA] pcm-midlev... |
446 |
hw_ptr_error(substream, |
f240406ba ALSA: pcm_lib - c... |
447 |
"hw_ptr skipping! %s" |
bbf6ad139 [ALSA] pcm-midlev... |
448 |
"(pos=%ld, delta=%ld, period=%ld, " |
f240406ba ALSA: pcm_lib - c... |
449 450 451 |
"jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld) ", in_interrupt ? "[Q] " : "", |
bbf6ad139 [ALSA] pcm-midlev... |
452 453 |
(long)pos, (long)hdelta, (long)runtime->period_size, jdelta, |
ed69c6a8e ALSA: pcm_lib - f... |
454 |
((hdelta * HZ) / runtime->rate), hw_base, |
f240406ba ALSA: pcm_lib - c... |
455 456 |
(unsigned long)old_hw_ptr, (unsigned long)new_hw_ptr); |
ed69c6a8e ALSA: pcm_lib - f... |
457 458 459 |
/* reset values to proper state */ delta = 0; hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); |
bbf6ad139 [ALSA] pcm-midlev... |
460 |
} |
3e5b50165 ALSA: pcm core - ... |
461 |
no_jiffies_check: |
bbf6ad139 [ALSA] pcm-midlev... |
462 |
if (delta > runtime->period_size + runtime->period_size / 2) { |
ed3da3d9a ALSA: Rewrite hw_... |
463 |
hw_ptr_error(substream, |
f240406ba ALSA: pcm_lib - c... |
464 465 466 467 468 |
"Lost interrupts? %s" "(stream=%i, delta=%ld, new_hw_ptr=%ld, " "old_hw_ptr=%ld) ", in_interrupt ? "[Q] " : "", |
ed3da3d9a ALSA: Rewrite hw_... |
469 |
substream->stream, (long)delta, |
f240406ba ALSA: pcm_lib - c... |
470 471 |
(long)new_hw_ptr, (long)old_hw_ptr); |
ed3da3d9a ALSA: Rewrite hw_... |
472 |
} |
f240406ba ALSA: pcm_lib - c... |
473 |
|
ab69a4904 ALSA: pcm: suppor... |
474 |
no_delta_check: |
f240406ba ALSA: pcm_lib - c... |
475 476 |
if (runtime->status->hw_ptr == new_hw_ptr) return 0; |
ab1863fc9 ALSA: pcm - Fix u... |
477 |
|
1da177e4c Linux-2.6.12-rc2 |
478 479 480 |
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && runtime->silence_size > 0) snd_pcm_playback_silence(substream, new_hw_ptr); |
e76369257 ALSA: pcm_lib - r... |
481 |
if (in_interrupt) { |
ead4046b2 ALSA: pcm: fix th... |
482 483 484 485 486 487 488 |
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... |
489 |
} |
ed3da3d9a ALSA: Rewrite hw_... |
490 |
runtime->hw_ptr_base = hw_base; |
1da177e4c Linux-2.6.12-rc2 |
491 |
runtime->status->hw_ptr = new_hw_ptr; |
bbf6ad139 [ALSA] pcm-midlev... |
492 |
runtime->hw_ptr_jiffies = jiffies; |
13f040f9e ALSA: PCM midleve... |
493 494 |
if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); |
1da177e4c Linux-2.6.12-rc2 |
495 |
|
1250932e4 ALSA: pcm_lib - o... |
496 |
return snd_pcm_update_state(substream, runtime); |
1da177e4c Linux-2.6.12-rc2 |
497 498 499 |
} /* CAUTION: call it with irq disabled */ |
877211f5e [ALSA] Remove xxx... |
500 |
int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
501 |
{ |
f240406ba ALSA: pcm_lib - c... |
502 |
return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4c Linux-2.6.12-rc2 |
503 504 505 506 507 508 509 510 511 512 |
} /** * 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. */ |
877211f5e [ALSA] Remove xxx... |
513 |
void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops) |
1da177e4c Linux-2.6.12-rc2 |
514 |
{ |
877211f5e [ALSA] Remove xxx... |
515 516 |
struct snd_pcm_str *stream = &pcm->streams[direction]; struct snd_pcm_substream *substream; |
1da177e4c Linux-2.6.12-rc2 |
517 518 519 520 |
for (substream = stream->substream; substream != NULL; substream = substream->next) substream->ops = ops; } |
e88e8ae63 [ALSA] Move OSS-s... |
521 |
EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4c Linux-2.6.12-rc2 |
522 523 524 525 526 527 528 |
/** * snd_pcm_sync - set the PCM sync id * @substream: the pcm substream * * Sets the PCM sync identifier for the card. */ |
877211f5e [ALSA] Remove xxx... |
529 |
void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
530 |
{ |
877211f5e [ALSA] Remove xxx... |
531 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
532 533 534 535 536 537 |
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... |
538 |
EXPORT_SYMBOL(snd_pcm_set_sync); |
1da177e4c Linux-2.6.12-rc2 |
539 540 541 |
/* * Standard ioctl routine */ |
1da177e4c Linux-2.6.12-rc2 |
542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 |
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... |
586 |
snd_BUG_ON(!n); |
1da177e4c Linux-2.6.12-rc2 |
587 588 589 |
*r = 0; return UINT_MAX; } |
3f7440a6b ALSA: Clean up 64... |
590 |
n = div_u64_rem(n, c, r); |
1da177e4c Linux-2.6.12-rc2 |
591 592 593 594 595 596 |
if (n >= UINT_MAX) { *r = 0; return UINT_MAX; } return n; } |
1da177e4c Linux-2.6.12-rc2 |
597 598 599 600 601 602 603 604 605 606 607 |
/** * 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. * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
608 |
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4c Linux-2.6.12-rc2 |
609 610 |
{ int changed = 0; |
7eaa943c8 ALSA: Kill snd_as... |
611 612 |
if (snd_BUG_ON(snd_interval_empty(i))) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 |
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... |
650 |
EXPORT_SYMBOL(snd_interval_refine); |
877211f5e [ALSA] Remove xxx... |
651 |
static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4c Linux-2.6.12-rc2 |
652 |
{ |
7eaa943c8 ALSA: Kill snd_as... |
653 654 |
if (snd_BUG_ON(snd_interval_empty(i))) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
655 656 657 658 659 660 661 662 |
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... |
663 |
static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4c Linux-2.6.12-rc2 |
664 |
{ |
7eaa943c8 ALSA: Kill snd_as... |
665 666 |
if (snd_BUG_ON(snd_interval_empty(i))) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
667 668 669 670 671 672 673 674 |
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... |
675 |
void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4c Linux-2.6.12-rc2 |
676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 |
{ 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... |
691 692 693 |
* @a: dividend * @b: divisor * @c: quotient |
1da177e4c Linux-2.6.12-rc2 |
694 695 696 697 698 |
* * c = a / b * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
699 |
void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4c Linux-2.6.12-rc2 |
700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 |
{ 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... |
725 726 727 728 729 |
* @a: dividend 1 * @b: dividend 2 * @k: divisor (as integer) * @c: result * |
1da177e4c Linux-2.6.12-rc2 |
730 731 732 733 |
* c = a * b / k * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
734 735 |
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 |
736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 |
{ 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... |
756 757 758 759 |
* @a: dividend 1 * @k: dividend 2 (as integer) * @b: divisor * @c: result |
1da177e4c Linux-2.6.12-rc2 |
760 761 762 763 764 |
* * c = a * k / b * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
765 766 |
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 |
767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 |
{ 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 |
789 790 791 792 793 |
/* ---- */ /** * snd_interval_ratnum - refine the interval value |
df8db936e [ALSA] Fix DocBoo... |
794 795 796 797 798 |
* @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 |
799 800 801 |
* * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
802 803 804 |
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 |
805 |
{ |
8374e24c2 ALSA: refine rate... |
806 807 |
unsigned int best_num, best_den; int best_diff; |
1da177e4c Linux-2.6.12-rc2 |
808 |
unsigned int k; |
877211f5e [ALSA] Remove xxx... |
809 |
struct snd_interval t; |
1da177e4c Linux-2.6.12-rc2 |
810 |
int err; |
8374e24c2 ALSA: refine rate... |
811 812 |
unsigned int result_num, result_den; int result_diff; |
1da177e4c Linux-2.6.12-rc2 |
813 814 815 816 817 818 819 820 821 |
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... |
822 |
den = div_up(num, q); |
1da177e4c Linux-2.6.12-rc2 |
823 824 825 826 827 828 829 830 831 832 833 |
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... |
834 835 |
if (diff < 0) diff = -diff; |
1da177e4c Linux-2.6.12-rc2 |
836 837 838 839 840 841 842 843 844 845 846 847 848 849 |
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... |
850 851 852 |
result_num = best_num; result_diff = best_diff; result_den = best_den; |
1da177e4c Linux-2.6.12-rc2 |
853 854 855 856 857 858 859 860 861 862 |
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... |
863 |
den = div_down(num, q); |
1da177e4c Linux-2.6.12-rc2 |
864 865 866 867 868 869 870 871 872 873 874 |
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... |
875 876 |
if (diff < 0) diff = -diff; |
1da177e4c Linux-2.6.12-rc2 |
877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 |
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... |
896 897 898 899 |
if (best_diff * result_den < result_diff * best_den) { result_num = best_num; result_den = best_den; } |
1da177e4c Linux-2.6.12-rc2 |
900 |
if (nump) |
8374e24c2 ALSA: refine rate... |
901 |
*nump = result_num; |
1da177e4c Linux-2.6.12-rc2 |
902 |
if (denp) |
8374e24c2 ALSA: refine rate... |
903 |
*denp = result_den; |
1da177e4c Linux-2.6.12-rc2 |
904 905 906 |
} return err; } |
e88e8ae63 [ALSA] Move OSS-s... |
907 |
EXPORT_SYMBOL(snd_interval_ratnum); |
1da177e4c Linux-2.6.12-rc2 |
908 909 |
/** * snd_interval_ratden - refine the interval value |
df8db936e [ALSA] Fix DocBoo... |
910 |
* @i: interval to refine |
877211f5e [ALSA] Remove xxx... |
911 912 |
* @rats_count: number of struct ratden * @rats: struct ratden array |
df8db936e [ALSA] Fix DocBoo... |
913 914 |
* @nump: pointer to store the resultant numerator * @denp: pointer to store the resultant denominator |
1da177e4c Linux-2.6.12-rc2 |
915 916 917 |
* * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
918 919 |
static int snd_interval_ratden(struct snd_interval *i, unsigned int rats_count, struct snd_ratden *rats, |
1da177e4c Linux-2.6.12-rc2 |
920 921 922 923 |
unsigned int *nump, unsigned int *denp) { unsigned int best_num, best_diff, best_den; unsigned int k; |
877211f5e [ALSA] Remove xxx... |
924 |
struct snd_interval t; |
1da177e4c Linux-2.6.12-rc2 |
925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 |
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. * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
1017 |
int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask) |
1da177e4c Linux-2.6.12-rc2 |
1018 1019 |
{ unsigned int k; |
b1ddaf681 sound: pcm_lib: f... |
1020 |
struct snd_interval list_range; |
0981a260a [ALSA] Fix possib... |
1021 1022 1023 1024 1025 |
if (!count) { i->empty = 1; return -EINVAL; } |
b1ddaf681 sound: pcm_lib: f... |
1026 1027 1028 |
snd_interval_any(&list_range); list_range.min = UINT_MAX; list_range.max = 0; |
1da177e4c Linux-2.6.12-rc2 |
1029 1030 1031 |
for (k = 0; k < count; k++) { if (mask && !(mask & (1 << k))) continue; |
b1ddaf681 sound: pcm_lib: f... |
1032 |
if (!snd_interval_test(i, list[k])) |
1da177e4c Linux-2.6.12-rc2 |
1033 |
continue; |
b1ddaf681 sound: pcm_lib: f... |
1034 1035 |
list_range.min = min(list_range.min, list[k]); list_range.max = max(list_range.max, list[k]); |
1da177e4c Linux-2.6.12-rc2 |
1036 |
} |
b1ddaf681 sound: pcm_lib: f... |
1037 |
return snd_interval_refine(i, &list_range); |
1da177e4c Linux-2.6.12-rc2 |
1038 |
} |
e88e8ae63 [ALSA] Move OSS-s... |
1039 |
EXPORT_SYMBOL(snd_interval_list); |
877211f5e [ALSA] Remove xxx... |
1040 |
static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) |
1da177e4c Linux-2.6.12-rc2 |
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 |
{ unsigned int n; int changed = 0; n = (i->min - min) % step; if (n != 0 || i->openmin) { i->min += step - n; changed = 1; } n = (i->max - min) % step; if (n != 0 || i->openmax) { i->max -= n; 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 * * Returns zero if successful, or a negative error code on failure. */ |
877211f5e [ALSA] Remove xxx... |
1074 |
int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4c Linux-2.6.12-rc2 |
1075 1076 1077 1078 |
int var, snd_pcm_hw_rule_func_t func, void *private, int dep, ...) { |
877211f5e [ALSA] Remove xxx... |
1079 1080 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_pcm_hw_rule *c; |
1da177e4c Linux-2.6.12-rc2 |
1081 1082 1083 1084 |
unsigned int k; va_list args; va_start(args, dep); if (constrs->rules_num >= constrs->rules_all) { |
877211f5e [ALSA] Remove xxx... |
1085 |
struct snd_pcm_hw_rule *new; |
1da177e4c Linux-2.6.12-rc2 |
1086 1087 |
unsigned int new_rules = constrs->rules_all + 16; new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); |
87a1c8aaa ALSA: pcm: rememb... |
1088 1089 |
if (!new) { va_end(args); |
1da177e4c Linux-2.6.12-rc2 |
1090 |
return -ENOMEM; |
87a1c8aaa ALSA: pcm: rememb... |
1091 |
} |
1da177e4c Linux-2.6.12-rc2 |
1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 |
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... |
1107 1108 |
if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { va_end(args); |
7eaa943c8 ALSA: Kill snd_as... |
1109 |
return -EINVAL; |
87a1c8aaa ALSA: pcm: rememb... |
1110 |
} |
1da177e4c Linux-2.6.12-rc2 |
1111 1112 1113 1114 1115 1116 1117 1118 |
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... |
1119 |
} |
1da177e4c Linux-2.6.12-rc2 |
1120 |
|
e88e8ae63 [ALSA] Move OSS-s... |
1121 |
EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1da177e4c Linux-2.6.12-rc2 |
1122 |
/** |
1c85cc644 ALSA: kernel docs... |
1123 |
* snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936e [ALSA] Fix DocBoo... |
1124 1125 1126 1127 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the mask * @mask: the bitmap mask * |
1c85cc644 ALSA: kernel docs... |
1128 |
* Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
1da177e4c Linux-2.6.12-rc2 |
1129 |
*/ |
877211f5e [ALSA] Remove xxx... |
1130 |
int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4c Linux-2.6.12-rc2 |
1131 1132 |
u_int32_t mask) { |
877211f5e [ALSA] Remove xxx... |
1133 1134 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_mask *maskp = constrs_mask(constrs, var); |
1da177e4c Linux-2.6.12-rc2 |
1135 1136 1137 1138 1139 1140 1141 1142 |
*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... |
1143 |
* snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936e [ALSA] Fix DocBoo... |
1144 1145 1146 1147 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the mask * @mask: the 64bit bitmap mask * |
1c85cc644 ALSA: kernel docs... |
1148 |
* Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
1da177e4c Linux-2.6.12-rc2 |
1149 |
*/ |
877211f5e [ALSA] Remove xxx... |
1150 |
int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4c Linux-2.6.12-rc2 |
1151 1152 |
u_int64_t mask) { |
877211f5e [ALSA] Remove xxx... |
1153 1154 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_mask *maskp = constrs_mask(constrs, var); |
1da177e4c Linux-2.6.12-rc2 |
1155 1156 1157 1158 1159 1160 1161 1162 1163 |
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; } /** |
1c85cc644 ALSA: kernel docs... |
1164 |
* snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936e [ALSA] Fix DocBoo... |
1165 1166 1167 1168 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the integer constraint * * Apply the constraint of integer to an interval parameter. |
1da177e4c Linux-2.6.12-rc2 |
1169 |
*/ |
877211f5e [ALSA] Remove xxx... |
1170 |
int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1171 |
{ |
877211f5e [ALSA] Remove xxx... |
1172 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4c Linux-2.6.12-rc2 |
1173 1174 |
return snd_interval_setinteger(constrs_interval(constrs, var)); } |
e88e8ae63 [ALSA] Move OSS-s... |
1175 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1da177e4c Linux-2.6.12-rc2 |
1176 |
/** |
1c85cc644 ALSA: kernel docs... |
1177 |
* snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936e [ALSA] Fix DocBoo... |
1178 1179 1180 1181 1182 1183 |
* @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. |
1da177e4c Linux-2.6.12-rc2 |
1184 |
*/ |
877211f5e [ALSA] Remove xxx... |
1185 |
int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4c Linux-2.6.12-rc2 |
1186 1187 |
unsigned int min, unsigned int max) { |
877211f5e [ALSA] Remove xxx... |
1188 1189 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_interval t; |
1da177e4c Linux-2.6.12-rc2 |
1190 1191 1192 1193 1194 1195 |
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... |
1196 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
877211f5e [ALSA] Remove xxx... |
1197 1198 |
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 |
1199 |
{ |
877211f5e [ALSA] Remove xxx... |
1200 |
struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4c Linux-2.6.12-rc2 |
1201 1202 1203 1204 1205 |
return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); } /** |
1c85cc644 ALSA: kernel docs... |
1206 |
* snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936e [ALSA] Fix DocBoo... |
1207 1208 1209 1210 1211 1212 |
* @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. |
1da177e4c Linux-2.6.12-rc2 |
1213 |
*/ |
877211f5e [ALSA] Remove xxx... |
1214 |
int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1215 1216 |
unsigned int cond, snd_pcm_hw_param_t var, |
877211f5e [ALSA] Remove xxx... |
1217 |
struct snd_pcm_hw_constraint_list *l) |
1da177e4c Linux-2.6.12-rc2 |
1218 1219 1220 1221 1222 |
{ return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_list, l, var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1223 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
877211f5e [ALSA] Remove xxx... |
1224 1225 |
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 |
1226 |
{ |
877211f5e [ALSA] Remove xxx... |
1227 |
struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4c Linux-2.6.12-rc2 |
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 |
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... |
1240 |
* snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936e [ALSA] Fix DocBoo... |
1241 1242 1243 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the ratnums constraint |
877211f5e [ALSA] Remove xxx... |
1244 |
* @r: struct snd_ratnums constriants |
1da177e4c Linux-2.6.12-rc2 |
1245 |
*/ |
877211f5e [ALSA] Remove xxx... |
1246 |
int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1247 1248 |
unsigned int cond, snd_pcm_hw_param_t var, |
877211f5e [ALSA] Remove xxx... |
1249 |
struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4c Linux-2.6.12-rc2 |
1250 1251 1252 1253 1254 |
{ return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_ratnums, r, var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1255 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
877211f5e [ALSA] Remove xxx... |
1256 1257 |
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 |
1258 |
{ |
877211f5e [ALSA] Remove xxx... |
1259 |
struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4c Linux-2.6.12-rc2 |
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 |
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... |
1271 |
* snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936e [ALSA] Fix DocBoo... |
1272 1273 1274 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the ratdens constraint |
877211f5e [ALSA] Remove xxx... |
1275 |
* @r: struct snd_ratdens constriants |
1da177e4c Linux-2.6.12-rc2 |
1276 |
*/ |
877211f5e [ALSA] Remove xxx... |
1277 |
int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1278 1279 |
unsigned int cond, snd_pcm_hw_param_t var, |
877211f5e [ALSA] Remove xxx... |
1280 |
struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4c Linux-2.6.12-rc2 |
1281 1282 1283 1284 1285 |
{ return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_ratdens, r, var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1286 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
877211f5e [ALSA] Remove xxx... |
1287 1288 |
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 |
1289 1290 1291 1292 |
{ unsigned int l = (unsigned long) rule->private; int width = l & 0xffff; unsigned int msbits = l >> 16; |
877211f5e [ALSA] Remove xxx... |
1293 |
struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4c Linux-2.6.12-rc2 |
1294 1295 1296 1297 1298 1299 |
if (snd_interval_single(i) && snd_interval_value(i) == width) params->msbits = msbits; return 0; } /** |
1c85cc644 ALSA: kernel docs... |
1300 |
* snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936e [ALSA] Fix DocBoo... |
1301 1302 1303 1304 |
* @runtime: PCM runtime instance * @cond: condition bits * @width: sample bits width * @msbits: msbits width |
1da177e4c Linux-2.6.12-rc2 |
1305 |
*/ |
877211f5e [ALSA] Remove xxx... |
1306 |
int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 |
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... |
1317 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
877211f5e [ALSA] Remove xxx... |
1318 1319 |
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 |
1320 1321 1322 1323 1324 1325 |
{ unsigned long step = (unsigned long) rule->private; return snd_interval_step(hw_param_interval(params, rule->var), 0, step); } /** |
1c85cc644 ALSA: kernel docs... |
1326 |
* snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936e [ALSA] Fix DocBoo... |
1327 1328 1329 1330 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the step constraint * @step: step size |
1da177e4c Linux-2.6.12-rc2 |
1331 |
*/ |
877211f5e [ALSA] Remove xxx... |
1332 |
int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1333 1334 1335 1336 1337 1338 1339 1340 |
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... |
1341 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
877211f5e [ALSA] Remove xxx... |
1342 |
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 |
1343 |
{ |
67c393172 [ALSA] pcm_lib: f... |
1344 |
static unsigned int pow2_sizes[] = { |
1da177e4c Linux-2.6.12-rc2 |
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 |
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... |
1355 |
* snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936e [ALSA] Fix DocBoo... |
1356 1357 1358 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the power-of-2 constraint |
1da177e4c Linux-2.6.12-rc2 |
1359 |
*/ |
877211f5e [ALSA] Remove xxx... |
1360 |
int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1361 1362 1363 1364 1365 1366 1367 |
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... |
1368 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
d5b702a64 ALSA: pcm: add sn... |
1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 |
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 */ 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... |
1394 |
static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f72 [ALSA] sound/core... |
1395 |
snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 |
{ 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... |
1411 |
void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4c Linux-2.6.12-rc2 |
1412 1413 1414 1415 1416 1417 1418 1419 1420 |
{ 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... |
1421 |
EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4c Linux-2.6.12-rc2 |
1422 1423 |
/** |
1c85cc644 ALSA: kernel docs... |
1424 |
* snd_pcm_hw_param_value - return @params field @var value |
df8db936e [ALSA] Fix DocBoo... |
1425 1426 |
* @params: the hw_params instance * @var: parameter to retrieve |
1c85cc644 ALSA: kernel docs... |
1427 |
* @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4c Linux-2.6.12-rc2 |
1428 |
* |
1c85cc644 ALSA: kernel docs... |
1429 1430 |
* Return the value for field @var if it's fixed in configuration space * defined by @params. Return -%EINVAL otherwise. |
1da177e4c Linux-2.6.12-rc2 |
1431 |
*/ |
e88e8ae63 [ALSA] Move OSS-s... |
1432 1433 |
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 |
1434 1435 |
{ if (hw_is_mask(var)) { |
877211f5e [ALSA] Remove xxx... |
1436 |
const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4c Linux-2.6.12-rc2 |
1437 1438 1439 1440 1441 1442 1443 |
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... |
1444 |
const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4c Linux-2.6.12-rc2 |
1445 1446 1447 1448 1449 1450 |
if (!snd_interval_single(i)) return -EINVAL; if (dir) *dir = i->openmin; return snd_interval_value(i); } |
1da177e4c Linux-2.6.12-rc2 |
1451 1452 |
return -EINVAL; } |
e88e8ae63 [ALSA] Move OSS-s... |
1453 |
EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4c Linux-2.6.12-rc2 |
1454 |
|
877211f5e [ALSA] Remove xxx... |
1455 |
void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4c Linux-2.6.12-rc2 |
1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 |
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... |
1470 |
EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4c Linux-2.6.12-rc2 |
1471 |
|
877211f5e [ALSA] Remove xxx... |
1472 |
static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f72 [ALSA] sound/core... |
1473 |
snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1474 1475 1476 1477 1478 1479 |
{ 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... |
1480 |
else |
1da177e4c Linux-2.6.12-rc2 |
1481 |
return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1482 1483 1484 1485 1486 1487 1488 1489 1490 |
if (changed) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } /** |
1c85cc644 ALSA: kernel docs... |
1491 |
* snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936e [ALSA] Fix DocBoo... |
1492 1493 1494 |
* @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve |
1c85cc644 ALSA: kernel docs... |
1495 |
* @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4c Linux-2.6.12-rc2 |
1496 |
* |
1c85cc644 ALSA: kernel docs... |
1497 |
* Inside configuration space defined by @params remove from @var all |
1da177e4c Linux-2.6.12-rc2 |
1498 1499 1500 |
* values > minimum. Reduce configuration space accordingly. * Return the minimum. */ |
e88e8ae63 [ALSA] Move OSS-s... |
1501 1502 1503 |
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 |
1504 1505 1506 1507 1508 1509 |
{ 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... |
1510 1511 |
if (snd_BUG_ON(err < 0)) return err; |
1da177e4c Linux-2.6.12-rc2 |
1512 1513 1514 |
} return snd_pcm_hw_param_value(params, var, dir); } |
e88e8ae63 [ALSA] Move OSS-s... |
1515 |
EXPORT_SYMBOL(snd_pcm_hw_param_first); |
877211f5e [ALSA] Remove xxx... |
1516 |
static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f72 [ALSA] sound/core... |
1517 |
snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1518 1519 1520 1521 1522 1523 |
{ 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... |
1524 |
else |
1da177e4c Linux-2.6.12-rc2 |
1525 |
return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1526 1527 1528 1529 1530 1531 1532 1533 1534 |
if (changed) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } /** |
1c85cc644 ALSA: kernel docs... |
1535 |
* snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936e [ALSA] Fix DocBoo... |
1536 1537 1538 |
* @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve |
1c85cc644 ALSA: kernel docs... |
1539 |
* @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4c Linux-2.6.12-rc2 |
1540 |
* |
1c85cc644 ALSA: kernel docs... |
1541 |
* Inside configuration space defined by @params remove from @var all |
1da177e4c Linux-2.6.12-rc2 |
1542 1543 1544 |
* values < maximum. Reduce configuration space accordingly. * Return the maximum. */ |
e88e8ae63 [ALSA] Move OSS-s... |
1545 1546 1547 |
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 |
1548 1549 1550 1551 1552 1553 |
{ 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... |
1554 1555 |
if (snd_BUG_ON(err < 0)) return err; |
1da177e4c Linux-2.6.12-rc2 |
1556 1557 1558 |
} return snd_pcm_hw_param_value(params, var, dir); } |
e88e8ae63 [ALSA] Move OSS-s... |
1559 |
EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4c Linux-2.6.12-rc2 |
1560 1561 |
/** |
1c85cc644 ALSA: kernel docs... |
1562 |
* snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936e [ALSA] Fix DocBoo... |
1563 1564 |
* @pcm: PCM instance * @params: the hw_params instance |
1da177e4c Linux-2.6.12-rc2 |
1565 |
* |
1c85cc644 ALSA: kernel docs... |
1566 |
* Choose one configuration from configuration space defined by @params. |
1da177e4c Linux-2.6.12-rc2 |
1567 1568 1569 1570 |
* 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 */ |
2f4ca8e5c [ALSA] Clean up u... |
1571 1572 |
int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params) |
1da177e4c Linux-2.6.12-rc2 |
1573 |
{ |
2f4ca8e5c [ALSA] Clean up u... |
1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 |
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 |
1586 |
|
2f4ca8e5c [ALSA] Clean up u... |
1587 1588 1589 1590 1591 |
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... |
1592 1593 |
if (snd_BUG_ON(err < 0)) return err; |
2f4ca8e5c [ALSA] Clean up u... |
1594 |
} |
1da177e4c Linux-2.6.12-rc2 |
1595 1596 |
return 0; } |
877211f5e [ALSA] Remove xxx... |
1597 |
static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1598 1599 |
void *arg) { |
877211f5e [ALSA] Remove xxx... |
1600 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 |
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; else runtime->status->hw_ptr = 0; snd_pcm_stream_unlock_irqrestore(substream, flags); return 0; } |
877211f5e [ALSA] Remove xxx... |
1611 |
static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1612 1613 |
void *arg) { |
877211f5e [ALSA] Remove xxx... |
1614 1615 |
struct snd_pcm_channel_info *info = arg; struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 |
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... |
1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 |
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; int channels, width; 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); width = snd_pcm_format_physical_width(format); params->fifo_size /= width * channels; } return 0; } |
1da177e4c Linux-2.6.12-rc2 |
1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 |
/** * 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. * * Returns zero if successful, or a negative error code on failure. */ |
877211f5e [ALSA] Remove xxx... |
1672 |
int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1673 1674 1675 1676 1677 1678 1679 1680 1681 |
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... |
1682 1683 |
case SNDRV_PCM_IOCTL1_FIFO_SIZE: return snd_pcm_lib_ioctl_fifo_size(substream, arg); |
1da177e4c Linux-2.6.12-rc2 |
1684 1685 1686 |
} return -ENXIO; } |
e88e8ae63 [ALSA] Move OSS-s... |
1687 |
EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1da177e4c Linux-2.6.12-rc2 |
1688 1689 1690 1691 1692 1693 |
/** * 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... |
1694 |
* pointer, wake up sleepers, etc. |
1da177e4c Linux-2.6.12-rc2 |
1695 1696 1697 1698 |
* * Even if more than one periods have elapsed since the last call, you * have to call this only once. */ |
877211f5e [ALSA] Remove xxx... |
1699 |
void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
1700 |
{ |
877211f5e [ALSA] Remove xxx... |
1701 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
1702 |
unsigned long flags; |
7eaa943c8 ALSA: Kill snd_as... |
1703 1704 |
if (PCM_RUNTIME_CHECK(substream)) return; |
1da177e4c Linux-2.6.12-rc2 |
1705 |
runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1706 1707 1708 1709 1710 1711 |
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... |
1712 |
snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4c Linux-2.6.12-rc2 |
1713 1714 1715 1716 |
goto _end; if (substream->timer_running) snd_timer_interrupt(substream->timer, 1); |
1da177e4c Linux-2.6.12-rc2 |
1717 1718 1719 1720 1721 1722 |
_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... |
1723 |
EXPORT_SYMBOL(snd_pcm_period_elapsed); |
130755108 [ALSA] PCM - clea... |
1724 1725 1726 1727 1728 1729 |
/* * 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... |
1730 |
static int wait_for_avail(struct snd_pcm_substream *substream, |
130755108 [ALSA] PCM - clea... |
1731 1732 1733 1734 1735 1736 1737 |
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... |
1738 |
long wait_time, tout; |
763437a9e ALSA: pcm - fix r... |
1739 1740 1741 |
init_waitqueue_entry(&wait, current); set_current_state(TASK_INTERRUPTIBLE); add_wait_queue(&runtime->tsleep, &wait); |
f2b3614ce ALSA: PCM - Don't... |
1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 |
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... |
1752 |
|
130755108 [ALSA] PCM - clea... |
1753 1754 1755 1756 1757 |
for (;;) { if (signal_pending(current)) { err = -ERESTARTSYS; break; } |
763437a9e ALSA: pcm - fix r... |
1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 |
/* * 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... |
1772 |
snd_pcm_stream_unlock_irq(substream); |
763437a9e ALSA: pcm - fix r... |
1773 1774 |
tout = schedule_timeout(wait_time); |
130755108 [ALSA] PCM - clea... |
1775 |
snd_pcm_stream_lock_irq(substream); |
763437a9e ALSA: pcm - fix r... |
1776 |
set_current_state(TASK_INTERRUPTIBLE); |
130755108 [ALSA] PCM - clea... |
1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 |
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; } if (!tout) { snd_printd("%s write error (DMA or IRQ trouble?) ", is_playback ? "playback" : "capture"); err = -EIO; break; } |
130755108 [ALSA] PCM - clea... |
1803 1804 |
} _endloop: |
763437a9e ALSA: pcm - fix r... |
1805 |
set_current_state(TASK_RUNNING); |
c91a988dc ALSA: pcm_core: F... |
1806 |
remove_wait_queue(&runtime->tsleep, &wait); |
130755108 [ALSA] PCM - clea... |
1807 1808 1809 1810 |
*availp = avail; return err; } |
877211f5e [ALSA] Remove xxx... |
1811 |
static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1812 1813 1814 1815 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
1816 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1817 1818 1819 1820 1821 1822 1823 |
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 |
1824 1825 1826 1827 1828 1829 |
if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) return -EFAULT; } return 0; } |
877211f5e [ALSA] Remove xxx... |
1830 |
typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4c Linux-2.6.12-rc2 |
1831 1832 |
unsigned long data, unsigned int off, snd_pcm_uframes_t size); |
877211f5e [ALSA] Remove xxx... |
1833 |
static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1834 1835 1836 1837 1838 |
unsigned long data, snd_pcm_uframes_t size, int nonblock, transfer_f transfer) { |
877211f5e [ALSA] Remove xxx... |
1839 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1840 1841 1842 1843 1844 1845 |
snd_pcm_uframes_t xfer = 0; snd_pcm_uframes_t offset = 0; int err = 0; if (size == 0) return 0; |
1da177e4c Linux-2.6.12-rc2 |
1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 |
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... |
1863 |
runtime->twake = runtime->control->avail_min ? : 1; |
1da177e4c Linux-2.6.12-rc2 |
1864 1865 1866 1867 |
while (size > 0) { snd_pcm_uframes_t frames, appl_ptr, appl_ofs; snd_pcm_uframes_t avail; snd_pcm_uframes_t cont; |
31e8960b3 [ALSA] Remove PCM... |
1868 |
if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4c Linux-2.6.12-rc2 |
1869 1870 |
snd_pcm_update_hw_ptr(substream); avail = snd_pcm_playback_avail(runtime); |
130755108 [ALSA] PCM - clea... |
1871 |
if (!avail) { |
1da177e4c Linux-2.6.12-rc2 |
1872 1873 1874 1875 |
if (nonblock) { err = -EAGAIN; goto _end_unlock; } |
5daeba34d ALSA: pcm_lib: av... |
1876 1877 1878 |
runtime->twake = min_t(snd_pcm_uframes_t, size, runtime->control->avail_min ? : 1); err = wait_for_avail(substream, &avail); |
130755108 [ALSA] PCM - clea... |
1879 |
if (err < 0) |
443feb882 [ALSA] ALSA's str... |
1880 |
goto _end_unlock; |
1da177e4c Linux-2.6.12-rc2 |
1881 |
} |
1da177e4c Linux-2.6.12-rc2 |
1882 1883 1884 1885 |
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... |
1886 |
if (snd_BUG_ON(!frames)) { |
c91a988dc ALSA: pcm_core: F... |
1887 |
runtime->twake = 0; |
7eaa943c8 ALSA: Kill snd_as... |
1888 1889 1890 |
snd_pcm_stream_unlock_irq(substream); return -EINVAL; } |
1da177e4c Linux-2.6.12-rc2 |
1891 1892 1893 |
appl_ptr = runtime->control->appl_ptr; appl_ofs = appl_ptr % runtime->buffer_size; snd_pcm_stream_unlock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
1894 |
err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4c Linux-2.6.12-rc2 |
1895 |
snd_pcm_stream_lock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
1896 1897 |
if (err < 0) goto _end_unlock; |
1da177e4c Linux-2.6.12-rc2 |
1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 |
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; 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 |
1924 1925 |
} _end_unlock: |
c91a988dc ALSA: pcm_core: F... |
1926 |
runtime->twake = 0; |
1250932e4 ALSA: pcm_lib - o... |
1927 1928 |
if (xfer > 0 && err >= 0) snd_pcm_update_state(substream, runtime); |
1da177e4c Linux-2.6.12-rc2 |
1929 |
snd_pcm_stream_unlock_irq(substream); |
1da177e4c Linux-2.6.12-rc2 |
1930 1931 |
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; } |
7eaa943c8 ALSA: Kill snd_as... |
1932 1933 |
/* sanity-check for read/write methods */ static int pcm_sanity_check(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
1934 |
{ |
877211f5e [ALSA] Remove xxx... |
1935 |
struct snd_pcm_runtime *runtime; |
7eaa943c8 ALSA: Kill snd_as... |
1936 1937 |
if (PCM_RUNTIME_CHECK(substream)) return -ENXIO; |
1da177e4c Linux-2.6.12-rc2 |
1938 |
runtime = substream->runtime; |
7eaa943c8 ALSA: Kill snd_as... |
1939 1940 |
if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1941 1942 |
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) return -EBADFD; |
7eaa943c8 ALSA: Kill snd_as... |
1943 1944 1945 1946 1947 1948 1949 1950 |
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 |
1951 |
|
7eaa943c8 ALSA: Kill snd_as... |
1952 1953 1954 1955 |
err = pcm_sanity_check(substream); if (err < 0) return err; runtime = substream->runtime; |
0df63e44c [ALSA] Add O_APPE... |
1956 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
1957 1958 1959 1960 1961 1962 1963 |
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... |
1964 |
EXPORT_SYMBOL(snd_pcm_lib_write); |
877211f5e [ALSA] Remove xxx... |
1965 |
static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1966 1967 1968 1969 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
1970 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1971 1972 1973 1974 1975 |
int err; void __user **bufs = (void __user **)data; int channels = runtime->channels; int c; if (substream->ops->copy) { |
7eaa943c8 ALSA: Kill snd_as... |
1976 1977 |
if (snd_BUG_ON(!substream->ops->silence)) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 |
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 |
1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 |
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... |
2005 |
snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2006 2007 2008 |
void __user **bufs, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2009 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
2010 |
int nonblock; |
7eaa943c8 ALSA: Kill snd_as... |
2011 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
2012 |
|
7eaa943c8 ALSA: Kill snd_as... |
2013 2014 2015 |
err = pcm_sanity_check(substream); if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
2016 |
runtime = substream->runtime; |
0df63e44c [ALSA] Add O_APPE... |
2017 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2018 2019 2020 2021 2022 2023 |
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... |
2024 |
EXPORT_SYMBOL(snd_pcm_lib_writev); |
877211f5e [ALSA] Remove xxx... |
2025 |
static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2026 2027 2028 2029 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2030 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2031 2032 2033 2034 2035 2036 2037 |
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 |
2038 2039 2040 2041 2042 |
if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) return -EFAULT; } return 0; } |
877211f5e [ALSA] Remove xxx... |
2043 |
static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2044 2045 2046 2047 2048 |
unsigned long data, snd_pcm_uframes_t size, int nonblock, transfer_f transfer) { |
877211f5e [ALSA] Remove xxx... |
2049 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2050 2051 2052 2053 2054 2055 |
snd_pcm_uframes_t xfer = 0; snd_pcm_uframes_t offset = 0; int err = 0; if (size == 0) return 0; |
1da177e4c Linux-2.6.12-rc2 |
2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 |
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... |
2080 |
runtime->twake = runtime->control->avail_min ? : 1; |
1da177e4c Linux-2.6.12-rc2 |
2081 2082 2083 2084 |
while (size > 0) { snd_pcm_uframes_t frames, appl_ptr, appl_ofs; snd_pcm_uframes_t avail; snd_pcm_uframes_t cont; |
31e8960b3 [ALSA] Remove PCM... |
2085 |
if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4c Linux-2.6.12-rc2 |
2086 |
snd_pcm_update_hw_ptr(substream); |
1da177e4c Linux-2.6.12-rc2 |
2087 |
avail = snd_pcm_capture_avail(runtime); |
130755108 [ALSA] PCM - clea... |
2088 2089 2090 2091 |
if (!avail) { if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1da177e4c Linux-2.6.12-rc2 |
2092 2093 |
goto _end_unlock; } |
1da177e4c Linux-2.6.12-rc2 |
2094 2095 2096 2097 |
if (nonblock) { err = -EAGAIN; goto _end_unlock; } |
5daeba34d ALSA: pcm_lib: av... |
2098 2099 2100 |
runtime->twake = min_t(snd_pcm_uframes_t, size, runtime->control->avail_min ? : 1); err = wait_for_avail(substream, &avail); |
130755108 [ALSA] PCM - clea... |
2101 |
if (err < 0) |
443feb882 [ALSA] ALSA's str... |
2102 |
goto _end_unlock; |
130755108 [ALSA] PCM - clea... |
2103 2104 |
if (!avail) continue; /* draining */ |
1da177e4c Linux-2.6.12-rc2 |
2105 |
} |
1da177e4c Linux-2.6.12-rc2 |
2106 2107 2108 2109 |
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... |
2110 |
if (snd_BUG_ON(!frames)) { |
c91a988dc ALSA: pcm_core: F... |
2111 |
runtime->twake = 0; |
7eaa943c8 ALSA: Kill snd_as... |
2112 2113 2114 |
snd_pcm_stream_unlock_irq(substream); return -EINVAL; } |
1da177e4c Linux-2.6.12-rc2 |
2115 2116 2117 |
appl_ptr = runtime->control->appl_ptr; appl_ofs = appl_ptr % runtime->buffer_size; snd_pcm_stream_unlock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
2118 |
err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4c Linux-2.6.12-rc2 |
2119 |
snd_pcm_stream_lock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
2120 2121 |
if (err < 0) goto _end_unlock; |
1da177e4c Linux-2.6.12-rc2 |
2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 |
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; |
1da177e4c Linux-2.6.12-rc2 |
2142 2143 |
} _end_unlock: |
c91a988dc ALSA: pcm_core: F... |
2144 |
runtime->twake = 0; |
1250932e4 ALSA: pcm_lib - o... |
2145 2146 |
if (xfer > 0 && err >= 0) snd_pcm_update_state(substream, runtime); |
1da177e4c Linux-2.6.12-rc2 |
2147 |
snd_pcm_stream_unlock_irq(substream); |
1da177e4c Linux-2.6.12-rc2 |
2148 2149 |
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; } |
877211f5e [ALSA] Remove xxx... |
2150 |
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 |
2151 |
{ |
877211f5e [ALSA] Remove xxx... |
2152 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
2153 |
int nonblock; |
7eaa943c8 ALSA: Kill snd_as... |
2154 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
2155 |
|
7eaa943c8 ALSA: Kill snd_as... |
2156 2157 2158 |
err = pcm_sanity_check(substream); if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
2159 |
runtime = substream->runtime; |
0df63e44c [ALSA] Add O_APPE... |
2160 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2161 2162 2163 2164 |
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... |
2165 |
EXPORT_SYMBOL(snd_pcm_lib_read); |
877211f5e [ALSA] Remove xxx... |
2166 |
static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2167 2168 2169 2170 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2171 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 |
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 |
2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 |
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... |
2202 |
snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2203 2204 2205 |
void __user **bufs, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2206 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
2207 |
int nonblock; |
7eaa943c8 ALSA: Kill snd_as... |
2208 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
2209 |
|
7eaa943c8 ALSA: Kill snd_as... |
2210 2211 2212 |
err = pcm_sanity_check(substream); if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
2213 |
runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2214 2215 |
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) return -EBADFD; |
0df63e44c [ALSA] Add O_APPE... |
2216 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2217 2218 2219 2220 |
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 |
2221 |
EXPORT_SYMBOL(snd_pcm_lib_readv); |