Blame view
sound/core/pcm_lib.c
70.1 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 |
/* * Digital Audio (PCM) abstract layer |
c1017a4cd [ALSA] Changed Ja... |
3 |
* Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4c Linux-2.6.12-rc2 |
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 |
* 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 * */ |
1da177e4c Linux-2.6.12-rc2 |
22 23 |
#include <linux/slab.h> #include <linux/time.h> |
3f7440a6b ALSA: Clean up 64... |
24 |
#include <linux/math64.h> |
d81a6d717 sound: Add export... |
25 |
#include <linux/export.h> |
1da177e4c Linux-2.6.12-rc2 |
26 27 |
#include <sound/core.h> #include <sound/control.h> |
2d3391ec0 ALSA: PCM: channe... |
28 |
#include <sound/tlv.h> |
1da177e4c Linux-2.6.12-rc2 |
29 30 31 32 33 34 35 36 37 38 39 40 41 42 |
#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 */ |
877211f5e [ALSA] Remove xxx... |
43 |
void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4c Linux-2.6.12-rc2 |
44 |
{ |
877211f5e [ALSA] Remove xxx... |
45 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
46 47 48 49 50 51 52 53 54 55 56 57 58 59 |
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; } |
235475cb7 [ALSA] pcm - Fix ... |
60 |
if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4c Linux-2.6.12-rc2 |
61 |
return; |
1da177e4c Linux-2.6.12-rc2 |
62 63 64 65 66 67 68 69 70 |
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); |
9e216e8a4 ALSA: pcm core - ... |
71 72 |
if (avail > runtime->buffer_size) avail = runtime->buffer_size; |
1da177e4c Linux-2.6.12-rc2 |
73 74 75 76 77 78 79 80 81 82 83 84 |
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; |
9a826ddba [ALSA] pcm core: ... |
85 |
runtime->silence_start = new_hw_ptr; |
1da177e4c Linux-2.6.12-rc2 |
86 |
} else { |
9a826ddba [ALSA] pcm core: ... |
87 |
runtime->silence_start = ofs; |
1da177e4c Linux-2.6.12-rc2 |
88 |
} |
1da177e4c Linux-2.6.12-rc2 |
89 90 91 |
} frames = runtime->buffer_size - runtime->silence_filled; } |
7eaa943c8 ALSA: Kill snd_as... |
92 93 |
if (snd_BUG_ON(frames > runtime->buffer_size)) return; |
1da177e4c Linux-2.6.12-rc2 |
94 95 |
if (frames == 0) return; |
9a826ddba [ALSA] pcm core: ... |
96 |
ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4c Linux-2.6.12-rc2 |
97 98 99 100 101 102 103 |
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); |
7eaa943c8 ALSA: Kill snd_as... |
104 |
snd_BUG_ON(err < 0); |
1da177e4c Linux-2.6.12-rc2 |
105 106 107 108 109 110 111 112 113 114 115 |
} 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); |
7eaa943c8 ALSA: Kill snd_as... |
116 |
snd_BUG_ON(err < 0); |
1da177e4c Linux-2.6.12-rc2 |
117 118 119 120 121 122 123 124 125 126 127 128 129 130 |
} } 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; } } |
acb03d440 ALSA: Make snd_pc... |
131 132 |
#ifdef CONFIG_SND_DEBUG void snd_pcm_debug_name(struct snd_pcm_substream *substream, |
c00701101 ALSA: pcm - A hel... |
133 134 135 136 137 138 139 140 |
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); } |
acb03d440 ALSA: Make snd_pc... |
141 142 |
EXPORT_SYMBOL(snd_pcm_debug_name); #endif |
c00701101 ALSA: pcm - A hel... |
143 |
|
741b20cfb ALSA: pcm_lib.c -... |
144 145 146 147 148 |
#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 */ |
4d96eb255 ALSA: pcm_lib - a... |
149 150 |
#define XRUN_DEBUG_LOG (1<<5) /* show last 10 positions on err */ #define XRUN_DEBUG_LOGONCE (1<<6) /* do above only once */ |
741b20cfb ALSA: pcm_lib.c -... |
151 |
|
ed3da3d9a ALSA: Rewrite hw_... |
152 |
#ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb255 ALSA: pcm_lib - a... |
153 |
|
741b20cfb ALSA: pcm_lib.c -... |
154 155 |
#define xrun_debug(substream, mask) \ ((substream)->pstr->xrun_debug & (mask)) |
0f17014b3 ALSA: pcm_lib - f... |
156 157 158 |
#else #define xrun_debug(substream, mask) 0 #endif |
ed3da3d9a ALSA: Rewrite hw_... |
159 |
|
741b20cfb ALSA: pcm_lib.c -... |
160 161 162 |
#define dump_stack_on_xrun(substream) do { \ if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ dump_stack(); \ |
ed3da3d9a ALSA: Rewrite hw_... |
163 |
} while (0) |
877211f5e [ALSA] Remove xxx... |
164 |
static void xrun(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
165 |
{ |
13f040f9e ALSA: PCM midleve... |
166 167 168 169 |
struct snd_pcm_runtime *runtime = substream->runtime; if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); |
1da177e4c Linux-2.6.12-rc2 |
170 |
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cfb ALSA: pcm_lib.c -... |
171 |
if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c00701101 ALSA: pcm - A hel... |
172 |
char name[16]; |
acb03d440 ALSA: Make snd_pc... |
173 |
snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8b ALSA: pcm: Use st... |
174 175 |
pcm_warn(substream->pcm, "XRUN: %s ", name); |
ed3da3d9a ALSA: Rewrite hw_... |
176 |
dump_stack_on_xrun(substream); |
1da177e4c Linux-2.6.12-rc2 |
177 |
} |
1da177e4c Linux-2.6.12-rc2 |
178 |
} |
0f17014b3 ALSA: pcm_lib - f... |
179 |
#ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb255 ALSA: pcm_lib - a... |
180 181 182 |
#define hw_ptr_error(substream, fmt, args...) \ do { \ if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
f240406ba ALSA: pcm_lib - c... |
183 |
xrun_log_show(substream); \ |
09e56df8b ALSA: pcm: Use st... |
184 |
pr_err_ratelimited("ALSA: PCM: " fmt, ##args); \ |
4d96eb255 ALSA: pcm_lib - a... |
185 186 187 188 189 190 191 |
dump_stack_on_xrun(substream); \ } \ } while (0) #define XRUN_LOG_CNT 10 struct hwptr_log_entry { |
ec08b1448 ALSA: sound, core... |
192 |
unsigned int in_interrupt; |
4d96eb255 ALSA: pcm_lib - a... |
193 |
unsigned long jiffies; |
1da177e4c Linux-2.6.12-rc2 |
194 |
snd_pcm_uframes_t pos; |
4d96eb255 ALSA: pcm_lib - a... |
195 196 197 198 |
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; |
4d96eb255 ALSA: pcm_lib - a... |
199 |
}; |
1da177e4c Linux-2.6.12-rc2 |
200 |
|
4d96eb255 ALSA: pcm_lib - a... |
201 202 203 204 205 206 207 |
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, |
ec08b1448 ALSA: sound, core... |
208 |
snd_pcm_uframes_t pos, int in_interrupt) |
4d96eb255 ALSA: pcm_lib - a... |
209 210 211 212 213 214 215 216 217 218 219 220 221 |
{ 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; |
7c22f1aaa [ALSA] Remove snd... |
222 |
} |
4d96eb255 ALSA: pcm_lib - a... |
223 |
entry = &log->entries[log->idx]; |
ec08b1448 ALSA: sound, core... |
224 |
entry->in_interrupt = in_interrupt; |
4d96eb255 ALSA: pcm_lib - a... |
225 226 227 |
entry->jiffies = jiffies; entry->pos = pos; entry->period_size = runtime->period_size; |
c80c1d542 ALSA: sound/core/... |
228 |
entry->buffer_size = runtime->buffer_size; |
4d96eb255 ALSA: pcm_lib - a... |
229 230 |
entry->old_hw_ptr = runtime->status->hw_ptr; entry->hw_ptr_base = runtime->hw_ptr_base; |
4d96eb255 ALSA: pcm_lib - a... |
231 |
log->idx = (log->idx + 1) % XRUN_LOG_CNT; |
1da177e4c Linux-2.6.12-rc2 |
232 |
} |
4d96eb255 ALSA: pcm_lib - a... |
233 234 235 236 237 238 239 240 241 242 243 244 |
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; |
acb03d440 ALSA: Make snd_pc... |
245 |
snd_pcm_debug_name(substream, name, sizeof(name)); |
4d96eb255 ALSA: pcm_lib - a... |
246 247 248 249 |
for (cnt = 0, idx = log->idx; cnt < XRUN_LOG_CNT; cnt++) { entry = &log->entries[idx]; if (entry->period_size == 0) break; |
09e56df8b ALSA: pcm: Use st... |
250 |
pr_info("hwptr log: %s: %sj=%lu, pos=%ld/%ld/%ld, " |
f240406ba ALSA: pcm_lib - c... |
251 252 |
"hwptr=%ld/%ld ", |
ec08b1448 ALSA: sound, core... |
253 254 255 |
name, entry->in_interrupt ? "[Q] " : "", entry->jiffies, (unsigned long)entry->pos, |
4d96eb255 ALSA: pcm_lib - a... |
256 257 258 |
(unsigned long)entry->period_size, (unsigned long)entry->buffer_size, (unsigned long)entry->old_hw_ptr, |
f240406ba ALSA: pcm_lib - c... |
259 |
(unsigned long)entry->hw_ptr_base); |
4d96eb255 ALSA: pcm_lib - a... |
260 261 262 263 264 265 266 |
idx++; idx %= XRUN_LOG_CNT; } log->hit = 1; } #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
4d96eb255 ALSA: pcm_lib - a... |
267 |
#define hw_ptr_error(substream, fmt, args...) do { } while (0) |
217658f46 ALSA: sound, core... |
268 |
#define xrun_log(substream, pos, in_interrupt) do { } while (0) |
4d96eb255 ALSA: pcm_lib - a... |
269 270 271 |
#define xrun_log_show(substream) do { } while (0) #endif |
1250932e4 ALSA: pcm_lib - o... |
272 273 |
int snd_pcm_update_state(struct snd_pcm_substream *substream, struct snd_pcm_runtime *runtime) |
1da177e4c Linux-2.6.12-rc2 |
274 275 276 277 278 279 280 281 282 |
{ 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; |
4cdc115fd ALSA: pcm - Fix d... |
283 284 |
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { if (avail >= runtime->buffer_size) { |
1da177e4c Linux-2.6.12-rc2 |
285 |
snd_pcm_drain_done(substream); |
4cdc115fd ALSA: pcm - Fix d... |
286 287 288 289 |
return -EPIPE; } } else { if (avail >= runtime->stop_threshold) { |
1da177e4c Linux-2.6.12-rc2 |
290 |
xrun(substream); |
4cdc115fd ALSA: pcm - Fix d... |
291 292 |
return -EPIPE; } |
1da177e4c Linux-2.6.12-rc2 |
293 |
} |
5daeba34d ALSA: pcm_lib: av... |
294 295 296 297 298 |
if (runtime->twake) { if (avail >= runtime->twake) wake_up(&runtime->tsleep); } else if (avail >= runtime->control->avail_min) wake_up(&runtime->sleep); |
1da177e4c Linux-2.6.12-rc2 |
299 300 |
return 0; } |
f240406ba ALSA: pcm_lib - c... |
301 302 |
static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, unsigned int in_interrupt) |
1da177e4c Linux-2.6.12-rc2 |
303 |
{ |
877211f5e [ALSA] Remove xxx... |
304 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
305 |
snd_pcm_uframes_t pos; |
f240406ba ALSA: pcm_lib - c... |
306 |
snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad139 [ALSA] pcm-midlev... |
307 308 |
snd_pcm_sframes_t hdelta, delta; unsigned long jdelta; |
3509a03f4 ALSA: core: group... |
309 310 |
unsigned long curr_jiffies; struct timespec curr_tstamp; |
4eeaaeaea ALSA: core: add h... |
311 |
struct timespec audio_tstamp; |
0e8014d77 ALSA: core: keep ... |
312 |
int crossed_boundary = 0; |
1da177e4c Linux-2.6.12-rc2 |
313 |
|
bbf6ad139 [ALSA] pcm-midlev... |
314 |
old_hw_ptr = runtime->status->hw_ptr; |
3509a03f4 ALSA: core: group... |
315 316 317 318 319 320 321 |
/* * group pointer, time and jiffies reads to allow for more * accurate correlations/corrections. * The values are stored at the end of this routine after * corrections for hw_ptr position */ |
f240406ba ALSA: pcm_lib - c... |
322 |
pos = substream->ops->pointer(substream); |
3509a03f4 ALSA: core: group... |
323 |
curr_jiffies = jiffies; |
4eeaaeaea ALSA: core: add h... |
324 |
if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3509a03f4 ALSA: core: group... |
325 |
snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); |
4eeaaeaea ALSA: core: add h... |
326 327 328 329 |
if ((runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) && (substream->ops->wall_clock)) substream->ops->wall_clock(substream, &audio_tstamp); } |
1da177e4c Linux-2.6.12-rc2 |
330 331 332 333 |
if (pos == SNDRV_PCM_POS_XRUN) { xrun(substream); return -EPIPE; } |
f240406ba ALSA: pcm_lib - c... |
334 |
if (pos >= runtime->buffer_size) { |
09e56df8b ALSA: pcm: Use st... |
335 |
if (printk_ratelimit()) { |
f240406ba ALSA: pcm_lib - c... |
336 |
char name[16]; |
acb03d440 ALSA: Make snd_pc... |
337 |
snd_pcm_debug_name(substream, name, sizeof(name)); |
f240406ba ALSA: pcm_lib - c... |
338 |
xrun_log_show(substream); |
09e56df8b ALSA: pcm: Use st... |
339 340 341 342 343 |
pcm_err(substream->pcm, "BUG: %s, pos = %ld, buffer size = %ld, period size = %ld ", name, pos, runtime->buffer_size, runtime->period_size); |
f240406ba ALSA: pcm_lib - c... |
344 345 |
} pos = 0; |
cedb8118e ALSA: pcm - Add l... |
346 |
} |
f240406ba ALSA: pcm_lib - c... |
347 348 |
pos -= pos % runtime->min_align; if (xrun_debug(substream, XRUN_DEBUG_LOG)) |
ec08b1448 ALSA: sound, core... |
349 |
xrun_log(substream, pos, in_interrupt); |
ed3da3d9a ALSA: Rewrite hw_... |
350 351 |
hw_base = runtime->hw_ptr_base; new_hw_ptr = hw_base + pos; |
f240406ba ALSA: pcm_lib - c... |
352 353 354 |
if (in_interrupt) { /* we know that one period was processed */ /* delta = "expected next hw_ptr" for in_interrupt != 0 */ |
e76369257 ALSA: pcm_lib - r... |
355 |
delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406ba ALSA: pcm_lib - c... |
356 |
if (delta > new_hw_ptr) { |
bd76af0f8 ALSA: pcm midleve... |
357 |
/* check for double acknowledged interrupts */ |
3509a03f4 ALSA: core: group... |
358 |
hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bd76af0f8 ALSA: pcm midleve... |
359 360 |
if (hdelta > runtime->hw_ptr_buffer_jiffies/2) { hw_base += runtime->buffer_size; |
0e8014d77 ALSA: core: keep ... |
361 |
if (hw_base >= runtime->boundary) { |
bd76af0f8 ALSA: pcm midleve... |
362 |
hw_base = 0; |
0e8014d77 ALSA: core: keep ... |
363 364 |
crossed_boundary++; } |
bd76af0f8 ALSA: pcm midleve... |
365 366 367 |
new_hw_ptr = hw_base + pos; goto __delta; } |
1da177e4c Linux-2.6.12-rc2 |
368 |
} |
1da177e4c Linux-2.6.12-rc2 |
369 |
} |
f240406ba ALSA: pcm_lib - c... |
370 371 372 373 |
/* 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; |
0e8014d77 ALSA: core: keep ... |
374 |
if (hw_base >= runtime->boundary) { |
f240406ba ALSA: pcm_lib - c... |
375 |
hw_base = 0; |
0e8014d77 ALSA: core: keep ... |
376 377 |
crossed_boundary++; } |
f240406ba ALSA: pcm_lib - c... |
378 379 380 |
new_hw_ptr = hw_base + pos; } __delta: |
b406e6103 ALSA: pcm: fix de... |
381 382 383 |
delta = new_hw_ptr - old_hw_ptr; if (delta < 0) delta += runtime->boundary; |
f240406ba ALSA: pcm_lib - c... |
384 385 386 |
if (xrun_debug(substream, in_interrupt ? XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { char name[16]; |
acb03d440 ALSA: Make snd_pc... |
387 |
snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8b ALSA: pcm: Use st... |
388 389 390 |
pcm_dbg(substream->pcm, "%s_update: %s: pos=%u/%u/%u, hwptr=%ld/%ld/%ld/%ld ", |
f240406ba ALSA: pcm_lib - c... |
391 392 393 394 395 396 397 398 399 400 |
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); } |
ab69a4904 ALSA: pcm: suppor... |
401 |
|
59ff878ff ALSA: pcm: detect... |
402 |
if (runtime->no_period_wakeup) { |
12ff414e2 ALSA: pcm: fix in... |
403 |
snd_pcm_sframes_t xrun_threshold; |
59ff878ff ALSA: pcm: detect... |
404 405 406 407 |
/* * Without regular period interrupts, we have to check * the elapsed time to detect xruns. */ |
3509a03f4 ALSA: core: group... |
408 |
jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48a ALSA: pcm: optimi... |
409 410 |
if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) goto no_delta_check; |
59ff878ff ALSA: pcm: detect... |
411 |
hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e2 ALSA: pcm: fix in... |
412 413 |
xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; while (hdelta > xrun_threshold) { |
59ff878ff ALSA: pcm: detect... |
414 415 |
delta += runtime->buffer_size; hw_base += runtime->buffer_size; |
0e8014d77 ALSA: core: keep ... |
416 |
if (hw_base >= runtime->boundary) { |
59ff878ff ALSA: pcm: detect... |
417 |
hw_base = 0; |
0e8014d77 ALSA: core: keep ... |
418 419 |
crossed_boundary++; } |
59ff878ff ALSA: pcm: detect... |
420 421 422 |
new_hw_ptr = hw_base + pos; hdelta -= runtime->hw_ptr_buffer_jiffies; } |
ab69a4904 ALSA: pcm: suppor... |
423 |
goto no_delta_check; |
59ff878ff ALSA: pcm: detect... |
424 |
} |
ab69a4904 ALSA: pcm: suppor... |
425 |
|
f240406ba ALSA: pcm_lib - c... |
426 |
/* something must be really wrong */ |
7b3a177b0 ALSA: pcm_lib: fi... |
427 |
if (delta >= runtime->buffer_size + runtime->period_size) { |
f240406ba ALSA: pcm_lib - c... |
428 429 430 431 432 433 434 435 436 437 |
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; } |
c87d97320 ALSA: Enable PCM ... |
438 439 |
/* Do jiffies check only in xrun_debug mode */ |
741b20cfb ALSA: pcm_lib.c -... |
440 |
if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d97320 ALSA: Enable PCM ... |
441 |
goto no_jiffies_check; |
3e5b50165 ALSA: pcm core - ... |
442 443 444 445 446 447 |
/* 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; |
f240406ba ALSA: pcm_lib - c... |
448 |
hdelta = delta; |
a4444da31 ALSA: PCM midleve... |
449 450 451 |
if (hdelta < runtime->delay) goto no_jiffies_check; hdelta -= runtime->delay; |
3509a03f4 ALSA: core: group... |
452 |
jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad139 [ALSA] pcm-midlev... |
453 454 455 456 |
if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { delta = jdelta / (((runtime->period_size * HZ) / runtime->rate) + HZ/100); |
f240406ba ALSA: pcm_lib - c... |
457 458 |
/* move new_hw_ptr according jiffies not pos variable */ new_hw_ptr = old_hw_ptr; |
ed69c6a8e ALSA: pcm_lib - f... |
459 |
hw_base = delta; |
f240406ba ALSA: pcm_lib - c... |
460 461 462 463 |
/* use loop to avoid checks for delta overflows */ /* the delta value is small or zero in most cases */ while (delta > 0) { new_hw_ptr += runtime->period_size; |
0e8014d77 ALSA: core: keep ... |
464 |
if (new_hw_ptr >= runtime->boundary) { |
f240406ba ALSA: pcm_lib - c... |
465 |
new_hw_ptr -= runtime->boundary; |
0e8014d77 ALSA: core: keep ... |
466 467 |
crossed_boundary--; } |
f240406ba ALSA: pcm_lib - c... |
468 469 470 |
delta--; } /* align hw_base to buffer_size */ |
bbf6ad139 [ALSA] pcm-midlev... |
471 |
hw_ptr_error(substream, |
f240406ba ALSA: pcm_lib - c... |
472 |
"hw_ptr skipping! %s" |
bbf6ad139 [ALSA] pcm-midlev... |
473 |
"(pos=%ld, delta=%ld, period=%ld, " |
f240406ba ALSA: pcm_lib - c... |
474 475 476 |
"jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld) ", in_interrupt ? "[Q] " : "", |
bbf6ad139 [ALSA] pcm-midlev... |
477 478 |
(long)pos, (long)hdelta, (long)runtime->period_size, jdelta, |
ed69c6a8e ALSA: pcm_lib - f... |
479 |
((hdelta * HZ) / runtime->rate), hw_base, |
f240406ba ALSA: pcm_lib - c... |
480 481 |
(unsigned long)old_hw_ptr, (unsigned long)new_hw_ptr); |
ed69c6a8e ALSA: pcm_lib - f... |
482 483 484 |
/* reset values to proper state */ delta = 0; hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); |
bbf6ad139 [ALSA] pcm-midlev... |
485 |
} |
3e5b50165 ALSA: pcm core - ... |
486 |
no_jiffies_check: |
bbf6ad139 [ALSA] pcm-midlev... |
487 |
if (delta > runtime->period_size + runtime->period_size / 2) { |
ed3da3d9a ALSA: Rewrite hw_... |
488 |
hw_ptr_error(substream, |
f240406ba ALSA: pcm_lib - c... |
489 490 491 492 493 |
"Lost interrupts? %s" "(stream=%i, delta=%ld, new_hw_ptr=%ld, " "old_hw_ptr=%ld) ", in_interrupt ? "[Q] " : "", |
ed3da3d9a ALSA: Rewrite hw_... |
494 |
substream->stream, (long)delta, |
f240406ba ALSA: pcm_lib - c... |
495 496 |
(long)new_hw_ptr, (long)old_hw_ptr); |
ed3da3d9a ALSA: Rewrite hw_... |
497 |
} |
f240406ba ALSA: pcm_lib - c... |
498 |
|
ab69a4904 ALSA: pcm: suppor... |
499 |
no_delta_check: |
f240406ba ALSA: pcm_lib - c... |
500 501 |
if (runtime->status->hw_ptr == new_hw_ptr) return 0; |
ab1863fc9 ALSA: pcm - Fix u... |
502 |
|
1da177e4c Linux-2.6.12-rc2 |
503 504 505 |
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && runtime->silence_size > 0) snd_pcm_playback_silence(substream, new_hw_ptr); |
e76369257 ALSA: pcm_lib - r... |
506 |
if (in_interrupt) { |
ead4046b2 ALSA: pcm: fix th... |
507 508 509 510 511 512 513 |
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... |
514 |
} |
ed3da3d9a ALSA: Rewrite hw_... |
515 |
runtime->hw_ptr_base = hw_base; |
1da177e4c Linux-2.6.12-rc2 |
516 |
runtime->status->hw_ptr = new_hw_ptr; |
3509a03f4 ALSA: core: group... |
517 |
runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d77 ALSA: core: keep ... |
518 519 520 521 |
if (crossed_boundary) { snd_BUG_ON(crossed_boundary != 1); runtime->hw_ptr_wrap += runtime->boundary; } |
4eeaaeaea ALSA: core: add h... |
522 |
if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3509a03f4 ALSA: core: group... |
523 |
runtime->status->tstamp = curr_tstamp; |
1da177e4c Linux-2.6.12-rc2 |
524 |
|
4eeaaeaea ALSA: core: add h... |
525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 |
if (!(runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)) { /* * no wall clock available, provide audio timestamp * derived from pointer position+delay */ u64 audio_frames, audio_nsecs; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr - runtime->delay; else audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr + runtime->delay; audio_nsecs = div_u64(audio_frames * 1000000000LL, runtime->rate); audio_tstamp = ns_to_timespec(audio_nsecs); } runtime->status->audio_tstamp = audio_tstamp; } |
1250932e4 ALSA: pcm_lib - o... |
546 |
return snd_pcm_update_state(substream, runtime); |
1da177e4c Linux-2.6.12-rc2 |
547 548 549 |
} /* CAUTION: call it with irq disabled */ |
877211f5e [ALSA] Remove xxx... |
550 |
int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
551 |
{ |
f240406ba ALSA: pcm_lib - c... |
552 |
return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4c Linux-2.6.12-rc2 |
553 554 555 556 557 558 559 560 561 562 |
} /** * snd_pcm_set_ops - set the PCM operators * @pcm: the pcm instance * @direction: stream direction, SNDRV_PCM_STREAM_XXX * @ops: the operator table * * Sets the given PCM operators to the pcm instance. */ |
e6c2e7eb2 ALSA: Constify th... |
563 564 |
void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, const struct snd_pcm_ops *ops) |
1da177e4c Linux-2.6.12-rc2 |
565 |
{ |
877211f5e [ALSA] Remove xxx... |
566 567 |
struct snd_pcm_str *stream = &pcm->streams[direction]; struct snd_pcm_substream *substream; |
1da177e4c Linux-2.6.12-rc2 |
568 569 570 571 |
for (substream = stream->substream; substream != NULL; substream = substream->next) substream->ops = ops; } |
e88e8ae63 [ALSA] Move OSS-s... |
572 |
EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4c Linux-2.6.12-rc2 |
573 574 575 576 577 578 579 |
/** * snd_pcm_sync - set the PCM sync id * @substream: the pcm substream * * Sets the PCM sync identifier for the card. */ |
877211f5e [ALSA] Remove xxx... |
580 |
void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
581 |
{ |
877211f5e [ALSA] Remove xxx... |
582 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
583 584 585 586 587 588 |
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... |
589 |
EXPORT_SYMBOL(snd_pcm_set_sync); |
1da177e4c Linux-2.6.12-rc2 |
590 591 592 |
/* * Standard ioctl routine */ |
1da177e4c Linux-2.6.12-rc2 |
593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 |
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... |
637 |
snd_BUG_ON(!n); |
1da177e4c Linux-2.6.12-rc2 |
638 639 640 |
*r = 0; return UINT_MAX; } |
3f7440a6b ALSA: Clean up 64... |
641 |
n = div_u64_rem(n, c, r); |
1da177e4c Linux-2.6.12-rc2 |
642 643 644 645 646 647 |
if (n >= UINT_MAX) { *r = 0; return UINT_MAX; } return n; } |
1da177e4c Linux-2.6.12-rc2 |
648 649 650 651 652 653 654 655 656 |
/** * snd_interval_refine - refine the interval value of configurator * @i: the interval value to refine * @v: the interval value to refer to * * Refines the interval value with the reference value. * The interval is changed to the range satisfying both intervals. * The interval status (min, max, integer, etc.) are evaluated. * |
eb7c06e8e ALSA: add/change ... |
657 658 |
* Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
659 |
*/ |
877211f5e [ALSA] Remove xxx... |
660 |
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4c Linux-2.6.12-rc2 |
661 662 |
{ int changed = 0; |
7eaa943c8 ALSA: Kill snd_as... |
663 664 |
if (snd_BUG_ON(snd_interval_empty(i))) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 |
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... |
702 |
EXPORT_SYMBOL(snd_interval_refine); |
877211f5e [ALSA] Remove xxx... |
703 |
static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4c Linux-2.6.12-rc2 |
704 |
{ |
7eaa943c8 ALSA: Kill snd_as... |
705 706 |
if (snd_BUG_ON(snd_interval_empty(i))) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
707 708 709 710 711 712 713 714 |
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... |
715 |
static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4c Linux-2.6.12-rc2 |
716 |
{ |
7eaa943c8 ALSA: Kill snd_as... |
717 718 |
if (snd_BUG_ON(snd_interval_empty(i))) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
719 720 721 722 723 724 725 726 |
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... |
727 |
void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4c Linux-2.6.12-rc2 |
728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 |
{ 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... |
743 744 745 |
* @a: dividend * @b: divisor * @c: quotient |
1da177e4c Linux-2.6.12-rc2 |
746 747 748 749 750 |
* * c = a / b * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
751 |
void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4c Linux-2.6.12-rc2 |
752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 |
{ 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... |
777 778 779 780 781 |
* @a: dividend 1 * @b: dividend 2 * @k: divisor (as integer) * @c: result * |
1da177e4c Linux-2.6.12-rc2 |
782 783 784 785 |
* c = a * b / k * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
786 787 |
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 |
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 |
{ 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... |
808 809 810 811 |
* @a: dividend 1 * @k: dividend 2 (as integer) * @b: divisor * @c: result |
1da177e4c Linux-2.6.12-rc2 |
812 813 814 815 816 |
* * c = a * k / b * * Returns non-zero if the value is changed, zero if not changed. */ |
877211f5e [ALSA] Remove xxx... |
817 818 |
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 |
819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 |
{ 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 |
841 842 843 844 845 |
/* ---- */ /** * snd_interval_ratnum - refine the interval value |
df8db936e [ALSA] Fix DocBoo... |
846 847 848 849 850 |
* @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 |
851 |
* |
eb7c06e8e ALSA: add/change ... |
852 853 |
* Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
854 |
*/ |
877211f5e [ALSA] Remove xxx... |
855 856 857 |
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 |
858 |
{ |
8374e24c2 ALSA: refine rate... |
859 860 |
unsigned int best_num, best_den; int best_diff; |
1da177e4c Linux-2.6.12-rc2 |
861 |
unsigned int k; |
877211f5e [ALSA] Remove xxx... |
862 |
struct snd_interval t; |
1da177e4c Linux-2.6.12-rc2 |
863 |
int err; |
8374e24c2 ALSA: refine rate... |
864 865 |
unsigned int result_num, result_den; int result_diff; |
1da177e4c Linux-2.6.12-rc2 |
866 867 868 869 870 871 872 873 874 |
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... |
875 |
den = div_up(num, q); |
1da177e4c Linux-2.6.12-rc2 |
876 877 878 879 880 881 882 883 884 885 886 |
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... |
887 888 |
if (diff < 0) diff = -diff; |
1da177e4c Linux-2.6.12-rc2 |
889 890 891 892 893 894 895 896 897 898 899 900 901 902 |
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... |
903 904 905 |
result_num = best_num; result_diff = best_diff; result_den = best_den; |
1da177e4c Linux-2.6.12-rc2 |
906 907 908 909 910 911 912 913 914 915 |
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... |
916 |
den = div_down(num, q); |
1da177e4c Linux-2.6.12-rc2 |
917 918 919 920 921 922 923 924 925 926 927 |
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... |
928 929 |
if (diff < 0) diff = -diff; |
1da177e4c Linux-2.6.12-rc2 |
930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 |
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... |
949 950 951 952 |
if (best_diff * result_den < result_diff * best_den) { result_num = best_num; result_den = best_den; } |
1da177e4c Linux-2.6.12-rc2 |
953 |
if (nump) |
8374e24c2 ALSA: refine rate... |
954 |
*nump = result_num; |
1da177e4c Linux-2.6.12-rc2 |
955 |
if (denp) |
8374e24c2 ALSA: refine rate... |
956 |
*denp = result_den; |
1da177e4c Linux-2.6.12-rc2 |
957 958 959 |
} return err; } |
e88e8ae63 [ALSA] Move OSS-s... |
960 |
EXPORT_SYMBOL(snd_interval_ratnum); |
1da177e4c Linux-2.6.12-rc2 |
961 962 |
/** * snd_interval_ratden - refine the interval value |
df8db936e [ALSA] Fix DocBoo... |
963 |
* @i: interval to refine |
877211f5e [ALSA] Remove xxx... |
964 965 |
* @rats_count: number of struct ratden * @rats: struct ratden array |
df8db936e [ALSA] Fix DocBoo... |
966 967 |
* @nump: pointer to store the resultant numerator * @denp: pointer to store the resultant denominator |
1da177e4c Linux-2.6.12-rc2 |
968 |
* |
eb7c06e8e ALSA: add/change ... |
969 970 |
* Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
971 |
*/ |
877211f5e [ALSA] Remove xxx... |
972 973 |
static int snd_interval_ratden(struct snd_interval *i, unsigned int rats_count, struct snd_ratden *rats, |
1da177e4c Linux-2.6.12-rc2 |
974 975 976 977 |
unsigned int *nump, unsigned int *denp) { unsigned int best_num, best_diff, best_den; unsigned int k; |
877211f5e [ALSA] Remove xxx... |
978 |
struct snd_interval t; |
1da177e4c Linux-2.6.12-rc2 |
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 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 |
int err; best_num = best_den = best_diff = 0; for (k = 0; k < rats_count; ++k) { unsigned int num; unsigned int den = rats[k].den; unsigned int q = i->min; int diff; num = mul(q, den); if (num > rats[k].num_max) continue; if (num < rats[k].num_min) num = rats[k].num_max; else { unsigned int r; r = (num - rats[k].num_min) % rats[k].num_step; if (r != 0) num += rats[k].num_step - r; } diff = num - q * den; if (best_num == 0 || diff * best_den < best_diff * den) { best_diff = diff; best_den = den; best_num = num; } } if (best_den == 0) { i->empty = 1; return -EINVAL; } t.min = div_down(best_num, best_den); t.openmin = !!(best_num % best_den); best_num = best_den = best_diff = 0; for (k = 0; k < rats_count; ++k) { unsigned int num; unsigned int den = rats[k].den; unsigned int q = i->max; int diff; num = mul(q, den); if (num < rats[k].num_min) continue; if (num > rats[k].num_max) num = rats[k].num_max; else { unsigned int r; r = (num - rats[k].num_min) % rats[k].num_step; if (r != 0) num -= r; } diff = q * den - num; if (best_num == 0 || diff * best_den < best_diff * den) { best_diff = diff; best_den = den; best_num = num; } } if (best_den == 0) { i->empty = 1; return -EINVAL; } t.max = div_up(best_num, best_den); t.openmax = !!(best_num % best_den); t.integer = 0; err = snd_interval_refine(i, &t); if (err < 0) return err; if (snd_interval_single(i)) { if (nump) *nump = best_num; if (denp) *denp = best_den; } return err; } /** * snd_interval_list - refine the interval value from the list * @i: the interval value to refine * @count: the number of elements in the list * @list: the value list * @mask: the bit-mask to evaluate * * Refines the interval value from the list. * When mask is non-zero, only the elements corresponding to bit 1 are * evaluated. * |
eb7c06e8e ALSA: add/change ... |
1069 1070 |
* Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
1071 |
*/ |
4af87a939 ALSA: pcm: Consti... |
1072 1073 |
int snd_interval_list(struct snd_interval *i, unsigned int count, const unsigned int *list, unsigned int mask) |
1da177e4c Linux-2.6.12-rc2 |
1074 1075 |
{ unsigned int k; |
b1ddaf681 sound: pcm_lib: f... |
1076 |
struct snd_interval list_range; |
0981a260a [ALSA] Fix possib... |
1077 1078 1079 1080 1081 |
if (!count) { i->empty = 1; return -EINVAL; } |
b1ddaf681 sound: pcm_lib: f... |
1082 1083 1084 |
snd_interval_any(&list_range); list_range.min = UINT_MAX; list_range.max = 0; |
1da177e4c Linux-2.6.12-rc2 |
1085 1086 1087 |
for (k = 0; k < count; k++) { if (mask && !(mask & (1 << k))) continue; |
b1ddaf681 sound: pcm_lib: f... |
1088 |
if (!snd_interval_test(i, list[k])) |
1da177e4c Linux-2.6.12-rc2 |
1089 |
continue; |
b1ddaf681 sound: pcm_lib: f... |
1090 1091 |
list_range.min = min(list_range.min, list[k]); list_range.max = max(list_range.max, list[k]); |
1da177e4c Linux-2.6.12-rc2 |
1092 |
} |
b1ddaf681 sound: pcm_lib: f... |
1093 |
return snd_interval_refine(i, &list_range); |
1da177e4c Linux-2.6.12-rc2 |
1094 |
} |
e88e8ae63 [ALSA] Move OSS-s... |
1095 |
EXPORT_SYMBOL(snd_interval_list); |
877211f5e [ALSA] Remove xxx... |
1096 |
static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) |
1da177e4c Linux-2.6.12-rc2 |
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 |
{ 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 * |
eb7c06e8e ALSA: add/change ... |
1128 |
* Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1129 |
*/ |
877211f5e [ALSA] Remove xxx... |
1130 |
int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4c Linux-2.6.12-rc2 |
1131 1132 1133 1134 |
int var, snd_pcm_hw_rule_func_t func, void *private, int dep, ...) { |
877211f5e [ALSA] Remove xxx... |
1135 1136 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_pcm_hw_rule *c; |
1da177e4c Linux-2.6.12-rc2 |
1137 1138 1139 1140 |
unsigned int k; va_list args; va_start(args, dep); if (constrs->rules_num >= constrs->rules_all) { |
877211f5e [ALSA] Remove xxx... |
1141 |
struct snd_pcm_hw_rule *new; |
1da177e4c Linux-2.6.12-rc2 |
1142 1143 |
unsigned int new_rules = constrs->rules_all + 16; new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); |
87a1c8aaa ALSA: pcm: rememb... |
1144 1145 |
if (!new) { va_end(args); |
1da177e4c Linux-2.6.12-rc2 |
1146 |
return -ENOMEM; |
87a1c8aaa ALSA: pcm: rememb... |
1147 |
} |
1da177e4c Linux-2.6.12-rc2 |
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 |
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... |
1163 1164 |
if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { va_end(args); |
7eaa943c8 ALSA: Kill snd_as... |
1165 |
return -EINVAL; |
87a1c8aaa ALSA: pcm: rememb... |
1166 |
} |
1da177e4c Linux-2.6.12-rc2 |
1167 1168 1169 1170 1171 1172 1173 1174 |
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... |
1175 |
} |
1da177e4c Linux-2.6.12-rc2 |
1176 |
|
e88e8ae63 [ALSA] Move OSS-s... |
1177 |
EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1da177e4c Linux-2.6.12-rc2 |
1178 |
/** |
1c85cc644 ALSA: kernel docs... |
1179 |
* snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936e [ALSA] Fix DocBoo... |
1180 1181 1182 1183 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the mask * @mask: the bitmap mask * |
1c85cc644 ALSA: kernel docs... |
1184 |
* Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8e ALSA: add/change ... |
1185 1186 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1187 |
*/ |
877211f5e [ALSA] Remove xxx... |
1188 |
int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4c Linux-2.6.12-rc2 |
1189 1190 |
u_int32_t mask) { |
877211f5e [ALSA] Remove xxx... |
1191 1192 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_mask *maskp = constrs_mask(constrs, var); |
1da177e4c Linux-2.6.12-rc2 |
1193 1194 1195 1196 1197 1198 1199 1200 |
*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... |
1201 |
* snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936e [ALSA] Fix DocBoo... |
1202 1203 1204 1205 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the mask * @mask: the 64bit bitmap mask * |
1c85cc644 ALSA: kernel docs... |
1206 |
* Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8e ALSA: add/change ... |
1207 1208 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1209 |
*/ |
877211f5e [ALSA] Remove xxx... |
1210 |
int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4c Linux-2.6.12-rc2 |
1211 1212 |
u_int64_t mask) { |
877211f5e [ALSA] Remove xxx... |
1213 1214 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_mask *maskp = constrs_mask(constrs, var); |
1da177e4c Linux-2.6.12-rc2 |
1215 1216 1217 1218 1219 1220 1221 |
maskp->bits[0] &= (u_int32_t)mask; maskp->bits[1] &= (u_int32_t)(mask >> 32); memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ if (! maskp->bits[0] && ! maskp->bits[1]) return -EINVAL; return 0; } |
63a5d4c6a ALSA: Export snd_... |
1222 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4c Linux-2.6.12-rc2 |
1223 1224 |
/** |
1c85cc644 ALSA: kernel docs... |
1225 |
* snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936e [ALSA] Fix DocBoo... |
1226 1227 1228 1229 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the integer constraint * * Apply the constraint of integer to an interval parameter. |
eb7c06e8e ALSA: add/change ... |
1230 1231 1232 |
* * Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
1233 |
*/ |
877211f5e [ALSA] Remove xxx... |
1234 |
int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1235 |
{ |
877211f5e [ALSA] Remove xxx... |
1236 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4c Linux-2.6.12-rc2 |
1237 1238 |
return snd_interval_setinteger(constrs_interval(constrs, var)); } |
e88e8ae63 [ALSA] Move OSS-s... |
1239 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1da177e4c Linux-2.6.12-rc2 |
1240 |
/** |
1c85cc644 ALSA: kernel docs... |
1241 |
* snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936e [ALSA] Fix DocBoo... |
1242 1243 1244 1245 1246 1247 |
* @runtime: PCM runtime instance * @var: hw_params variable to apply the range * @min: the minimal value * @max: the maximal value * * Apply the min/max range constraint to an interval parameter. |
eb7c06e8e ALSA: add/change ... |
1248 1249 1250 |
* * Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. |
1da177e4c Linux-2.6.12-rc2 |
1251 |
*/ |
877211f5e [ALSA] Remove xxx... |
1252 |
int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4c Linux-2.6.12-rc2 |
1253 1254 |
unsigned int min, unsigned int max) { |
877211f5e [ALSA] Remove xxx... |
1255 1256 |
struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; struct snd_interval t; |
1da177e4c Linux-2.6.12-rc2 |
1257 1258 1259 1260 1261 1262 |
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... |
1263 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
877211f5e [ALSA] Remove xxx... |
1264 1265 |
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 |
1266 |
{ |
877211f5e [ALSA] Remove xxx... |
1267 |
struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4c Linux-2.6.12-rc2 |
1268 1269 1270 1271 1272 |
return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); } /** |
1c85cc644 ALSA: kernel docs... |
1273 |
* snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936e [ALSA] Fix DocBoo... |
1274 1275 1276 1277 1278 1279 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the list constraint * @l: list * * Apply the list of constraints to an interval parameter. |
eb7c06e8e ALSA: add/change ... |
1280 1281 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1282 |
*/ |
877211f5e [ALSA] Remove xxx... |
1283 |
int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1284 1285 |
unsigned int cond, snd_pcm_hw_param_t var, |
1464189f8 ALSA: pcm: Make c... |
1286 |
const struct snd_pcm_hw_constraint_list *l) |
1da177e4c Linux-2.6.12-rc2 |
1287 1288 |
{ return snd_pcm_hw_rule_add(runtime, cond, var, |
1464189f8 ALSA: pcm: Make c... |
1289 |
snd_pcm_hw_rule_list, (void *)l, |
1da177e4c Linux-2.6.12-rc2 |
1290 1291 |
var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1292 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
877211f5e [ALSA] Remove xxx... |
1293 1294 |
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 |
1295 |
{ |
877211f5e [ALSA] Remove xxx... |
1296 |
struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4c Linux-2.6.12-rc2 |
1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 |
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... |
1309 |
* snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936e [ALSA] Fix DocBoo... |
1310 1311 1312 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the ratnums constraint |
877211f5e [ALSA] Remove xxx... |
1313 |
* @r: struct snd_ratnums constriants |
eb7c06e8e ALSA: add/change ... |
1314 1315 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1316 |
*/ |
877211f5e [ALSA] Remove xxx... |
1317 |
int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1318 1319 |
unsigned int cond, snd_pcm_hw_param_t var, |
877211f5e [ALSA] Remove xxx... |
1320 |
struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4c Linux-2.6.12-rc2 |
1321 1322 1323 1324 1325 |
{ return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_ratnums, r, var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1326 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
877211f5e [ALSA] Remove xxx... |
1327 1328 |
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 |
1329 |
{ |
877211f5e [ALSA] Remove xxx... |
1330 |
struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4c Linux-2.6.12-rc2 |
1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 |
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... |
1342 |
* snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936e [ALSA] Fix DocBoo... |
1343 1344 1345 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the ratdens constraint |
877211f5e [ALSA] Remove xxx... |
1346 |
* @r: struct snd_ratdens constriants |
eb7c06e8e ALSA: add/change ... |
1347 1348 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1349 |
*/ |
877211f5e [ALSA] Remove xxx... |
1350 |
int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1351 1352 |
unsigned int cond, snd_pcm_hw_param_t var, |
877211f5e [ALSA] Remove xxx... |
1353 |
struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4c Linux-2.6.12-rc2 |
1354 1355 1356 1357 1358 |
{ return snd_pcm_hw_rule_add(runtime, cond, var, snd_pcm_hw_rule_ratdens, r, var, -1); } |
e88e8ae63 [ALSA] Move OSS-s... |
1359 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
877211f5e [ALSA] Remove xxx... |
1360 1361 |
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 |
1362 1363 1364 1365 |
{ unsigned int l = (unsigned long) rule->private; int width = l & 0xffff; unsigned int msbits = l >> 16; |
877211f5e [ALSA] Remove xxx... |
1366 |
struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4c Linux-2.6.12-rc2 |
1367 1368 1369 1370 1371 1372 |
if (snd_interval_single(i) && snd_interval_value(i) == width) params->msbits = msbits; return 0; } /** |
1c85cc644 ALSA: kernel docs... |
1373 |
* snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936e [ALSA] Fix DocBoo... |
1374 1375 1376 1377 |
* @runtime: PCM runtime instance * @cond: condition bits * @width: sample bits width * @msbits: msbits width |
eb7c06e8e ALSA: add/change ... |
1378 1379 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1380 |
*/ |
877211f5e [ALSA] Remove xxx... |
1381 |
int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 |
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... |
1392 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
877211f5e [ALSA] Remove xxx... |
1393 1394 |
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 |
1395 1396 1397 1398 1399 1400 |
{ unsigned long step = (unsigned long) rule->private; return snd_interval_step(hw_param_interval(params, rule->var), 0, step); } /** |
1c85cc644 ALSA: kernel docs... |
1401 |
* snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936e [ALSA] Fix DocBoo... |
1402 1403 1404 1405 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the step constraint * @step: step size |
eb7c06e8e ALSA: add/change ... |
1406 1407 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1408 |
*/ |
877211f5e [ALSA] Remove xxx... |
1409 |
int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1410 1411 1412 1413 1414 1415 1416 1417 |
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... |
1418 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
877211f5e [ALSA] Remove xxx... |
1419 |
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 |
1420 |
{ |
67c393172 [ALSA] pcm_lib: f... |
1421 |
static unsigned int pow2_sizes[] = { |
1da177e4c Linux-2.6.12-rc2 |
1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 |
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... |
1432 |
* snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936e [ALSA] Fix DocBoo... |
1433 1434 1435 |
* @runtime: PCM runtime instance * @cond: condition bits * @var: hw_params variable to apply the power-of-2 constraint |
eb7c06e8e ALSA: add/change ... |
1436 1437 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1438 |
*/ |
877211f5e [ALSA] Remove xxx... |
1439 |
int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4c Linux-2.6.12-rc2 |
1440 1441 1442 1443 1444 1445 1446 |
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... |
1447 |
EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
d5b702a64 ALSA: pcm: add sn... |
1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 |
static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; struct snd_interval *rate; rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); return snd_interval_list(rate, 1, &base_rate, 0); } /** * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling * @runtime: PCM runtime instance * @base_rate: the rate at which the hardware does not resample |
eb7c06e8e ALSA: add/change ... |
1462 1463 |
* * Return: Zero if successful, or a negative error code on failure. |
d5b702a64 ALSA: pcm: add sn... |
1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 |
*/ 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... |
1475 |
static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f72 [ALSA] sound/core... |
1476 |
snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 |
{ 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... |
1492 |
void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4c Linux-2.6.12-rc2 |
1493 1494 1495 1496 1497 1498 1499 1500 1501 |
{ 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... |
1502 |
EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4c Linux-2.6.12-rc2 |
1503 1504 |
/** |
1c85cc644 ALSA: kernel docs... |
1505 |
* snd_pcm_hw_param_value - return @params field @var value |
df8db936e [ALSA] Fix DocBoo... |
1506 1507 |
* @params: the hw_params instance * @var: parameter to retrieve |
1c85cc644 ALSA: kernel docs... |
1508 |
* @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4c Linux-2.6.12-rc2 |
1509 |
* |
eb7c06e8e ALSA: add/change ... |
1510 1511 |
* Return: The value for field @var if it's fixed in configuration space * defined by @params. -%EINVAL otherwise. |
1da177e4c Linux-2.6.12-rc2 |
1512 |
*/ |
e88e8ae63 [ALSA] Move OSS-s... |
1513 1514 |
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 |
1515 1516 |
{ if (hw_is_mask(var)) { |
877211f5e [ALSA] Remove xxx... |
1517 |
const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4c Linux-2.6.12-rc2 |
1518 1519 1520 1521 1522 1523 1524 |
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... |
1525 |
const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4c Linux-2.6.12-rc2 |
1526 1527 1528 1529 1530 1531 |
if (!snd_interval_single(i)) return -EINVAL; if (dir) *dir = i->openmin; return snd_interval_value(i); } |
1da177e4c Linux-2.6.12-rc2 |
1532 1533 |
return -EINVAL; } |
e88e8ae63 [ALSA] Move OSS-s... |
1534 |
EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4c Linux-2.6.12-rc2 |
1535 |
|
877211f5e [ALSA] Remove xxx... |
1536 |
void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4c Linux-2.6.12-rc2 |
1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 |
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... |
1551 |
EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4c Linux-2.6.12-rc2 |
1552 |
|
877211f5e [ALSA] Remove xxx... |
1553 |
static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f72 [ALSA] sound/core... |
1554 |
snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1555 1556 1557 1558 1559 1560 |
{ 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... |
1561 |
else |
1da177e4c Linux-2.6.12-rc2 |
1562 |
return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1563 1564 1565 1566 1567 1568 1569 1570 1571 |
if (changed) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } /** |
1c85cc644 ALSA: kernel docs... |
1572 |
* snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936e [ALSA] Fix DocBoo... |
1573 1574 1575 |
* @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve |
1c85cc644 ALSA: kernel docs... |
1576 |
* @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4c Linux-2.6.12-rc2 |
1577 |
* |
1c85cc644 ALSA: kernel docs... |
1578 |
* Inside configuration space defined by @params remove from @var all |
1da177e4c Linux-2.6.12-rc2 |
1579 |
* values > minimum. Reduce configuration space accordingly. |
eb7c06e8e ALSA: add/change ... |
1580 1581 |
* * Return: The minimum, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1582 |
*/ |
e88e8ae63 [ALSA] Move OSS-s... |
1583 1584 1585 |
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 |
1586 1587 1588 1589 1590 1591 |
{ 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... |
1592 1593 |
if (snd_BUG_ON(err < 0)) return err; |
1da177e4c Linux-2.6.12-rc2 |
1594 1595 1596 |
} return snd_pcm_hw_param_value(params, var, dir); } |
e88e8ae63 [ALSA] Move OSS-s... |
1597 |
EXPORT_SYMBOL(snd_pcm_hw_param_first); |
877211f5e [ALSA] Remove xxx... |
1598 |
static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f72 [ALSA] sound/core... |
1599 |
snd_pcm_hw_param_t var) |
1da177e4c Linux-2.6.12-rc2 |
1600 1601 1602 1603 1604 1605 |
{ 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... |
1606 |
else |
1da177e4c Linux-2.6.12-rc2 |
1607 |
return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1608 1609 1610 1611 1612 1613 1614 1615 1616 |
if (changed) { params->cmask |= 1 << var; params->rmask |= 1 << var; } return changed; } /** |
1c85cc644 ALSA: kernel docs... |
1617 |
* snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936e [ALSA] Fix DocBoo... |
1618 1619 1620 |
* @pcm: PCM instance * @params: the hw_params instance * @var: parameter to retrieve |
1c85cc644 ALSA: kernel docs... |
1621 |
* @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4c Linux-2.6.12-rc2 |
1622 |
* |
1c85cc644 ALSA: kernel docs... |
1623 |
* Inside configuration space defined by @params remove from @var all |
1da177e4c Linux-2.6.12-rc2 |
1624 |
* values < maximum. Reduce configuration space accordingly. |
eb7c06e8e ALSA: add/change ... |
1625 1626 |
* * Return: The maximum, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1627 |
*/ |
e88e8ae63 [ALSA] Move OSS-s... |
1628 1629 1630 |
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 |
1631 1632 1633 1634 1635 1636 |
{ 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... |
1637 1638 |
if (snd_BUG_ON(err < 0)) return err; |
1da177e4c Linux-2.6.12-rc2 |
1639 1640 1641 |
} return snd_pcm_hw_param_value(params, var, dir); } |
e88e8ae63 [ALSA] Move OSS-s... |
1642 |
EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4c Linux-2.6.12-rc2 |
1643 1644 |
/** |
1c85cc644 ALSA: kernel docs... |
1645 |
* snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936e [ALSA] Fix DocBoo... |
1646 1647 |
* @pcm: PCM instance * @params: the hw_params instance |
1da177e4c Linux-2.6.12-rc2 |
1648 |
* |
1c85cc644 ALSA: kernel docs... |
1649 |
* Choose one configuration from configuration space defined by @params. |
1da177e4c Linux-2.6.12-rc2 |
1650 1651 1652 |
* The configuration chosen is that obtained fixing in this order: * first access, first format, first subformat, min channels, * min rate, min period time, max buffer size, min tick time |
eb7c06e8e ALSA: add/change ... |
1653 1654 |
* * Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1655 |
*/ |
2f4ca8e5c [ALSA] Clean up u... |
1656 1657 |
int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params) |
1da177e4c Linux-2.6.12-rc2 |
1658 |
{ |
2f4ca8e5c [ALSA] Clean up u... |
1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 |
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 |
1671 |
|
2f4ca8e5c [ALSA] Clean up u... |
1672 1673 1674 1675 1676 |
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... |
1677 1678 |
if (snd_BUG_ON(err < 0)) return err; |
2f4ca8e5c [ALSA] Clean up u... |
1679 |
} |
1da177e4c Linux-2.6.12-rc2 |
1680 1681 |
return 0; } |
877211f5e [ALSA] Remove xxx... |
1682 |
static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1683 1684 |
void *arg) { |
877211f5e [ALSA] Remove xxx... |
1685 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1686 1687 1688 1689 1690 |
unsigned long flags; snd_pcm_stream_lock_irqsave(substream, flags); if (snd_pcm_running(substream) && snd_pcm_update_hw_ptr(substream) >= 0) runtime->status->hw_ptr %= runtime->buffer_size; |
0e8014d77 ALSA: core: keep ... |
1691 |
else { |
1da177e4c Linux-2.6.12-rc2 |
1692 |
runtime->status->hw_ptr = 0; |
0e8014d77 ALSA: core: keep ... |
1693 1694 |
runtime->hw_ptr_wrap = 0; } |
1da177e4c Linux-2.6.12-rc2 |
1695 1696 1697 |
snd_pcm_stream_unlock_irqrestore(substream, flags); return 0; } |
877211f5e [ALSA] Remove xxx... |
1698 |
static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1699 1700 |
void *arg) { |
877211f5e [ALSA] Remove xxx... |
1701 1702 |
struct snd_pcm_channel_info *info = arg; struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 |
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... |
1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 |
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 |
1748 1749 1750 1751 1752 1753 1754 1755 1756 |
/** * snd_pcm_lib_ioctl - a generic PCM ioctl callback * @substream: the pcm substream instance * @cmd: ioctl command * @arg: ioctl argument * * Processes the generic ioctl commands for PCM. * Can be passed as the ioctl callback for PCM ops. * |
eb7c06e8e ALSA: add/change ... |
1757 |
* Return: Zero if successful, or a negative error code on failure. |
1da177e4c Linux-2.6.12-rc2 |
1758 |
*/ |
877211f5e [ALSA] Remove xxx... |
1759 |
int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1760 1761 1762 1763 1764 1765 1766 1767 1768 |
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... |
1769 1770 |
case SNDRV_PCM_IOCTL1_FIFO_SIZE: return snd_pcm_lib_ioctl_fifo_size(substream, arg); |
1da177e4c Linux-2.6.12-rc2 |
1771 1772 1773 |
} return -ENXIO; } |
e88e8ae63 [ALSA] Move OSS-s... |
1774 |
EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1da177e4c Linux-2.6.12-rc2 |
1775 1776 1777 1778 1779 1780 |
/** * 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... |
1781 |
* pointer, wake up sleepers, etc. |
1da177e4c Linux-2.6.12-rc2 |
1782 1783 1784 1785 |
* * Even if more than one periods have elapsed since the last call, you * have to call this only once. */ |
877211f5e [ALSA] Remove xxx... |
1786 |
void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
1787 |
{ |
877211f5e [ALSA] Remove xxx... |
1788 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
1789 |
unsigned long flags; |
7eaa943c8 ALSA: Kill snd_as... |
1790 1791 |
if (PCM_RUNTIME_CHECK(substream)) return; |
1da177e4c Linux-2.6.12-rc2 |
1792 |
runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1793 1794 1795 1796 1797 1798 |
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... |
1799 |
snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4c Linux-2.6.12-rc2 |
1800 1801 1802 1803 |
goto _end; if (substream->timer_running) snd_timer_interrupt(substream->timer, 1); |
1da177e4c Linux-2.6.12-rc2 |
1804 1805 1806 1807 1808 1809 |
_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... |
1810 |
EXPORT_SYMBOL(snd_pcm_period_elapsed); |
130755108 [ALSA] PCM - clea... |
1811 1812 1813 1814 1815 1816 |
/* * 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... |
1817 |
static int wait_for_avail(struct snd_pcm_substream *substream, |
130755108 [ALSA] PCM - clea... |
1818 1819 1820 1821 1822 1823 1824 |
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... |
1825 |
long wait_time, tout; |
763437a9e ALSA: pcm - fix r... |
1826 1827 1828 |
init_waitqueue_entry(&wait, current); set_current_state(TASK_INTERRUPTIBLE); add_wait_queue(&runtime->tsleep, &wait); |
f2b3614ce ALSA: PCM - Don't... |
1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 |
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... |
1839 |
|
130755108 [ALSA] PCM - clea... |
1840 1841 1842 1843 1844 |
for (;;) { if (signal_pending(current)) { err = -ERESTARTSYS; break; } |
763437a9e ALSA: pcm - fix r... |
1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 |
/* * 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... |
1859 |
snd_pcm_stream_unlock_irq(substream); |
763437a9e ALSA: pcm - fix r... |
1860 1861 |
tout = schedule_timeout(wait_time); |
130755108 [ALSA] PCM - clea... |
1862 |
snd_pcm_stream_lock_irq(substream); |
763437a9e ALSA: pcm - fix r... |
1863 |
set_current_state(TASK_INTERRUPTIBLE); |
130755108 [ALSA] PCM - clea... |
1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 |
switch (runtime->status->state) { case SNDRV_PCM_STATE_SUSPENDED: err = -ESTRPIPE; goto _endloop; case SNDRV_PCM_STATE_XRUN: err = -EPIPE; goto _endloop; case SNDRV_PCM_STATE_DRAINING: if (is_playback) err = -EPIPE; else avail = 0; /* indicate draining */ goto _endloop; case SNDRV_PCM_STATE_OPEN: case SNDRV_PCM_STATE_SETUP: case SNDRV_PCM_STATE_DISCONNECTED: err = -EBADFD; goto _endloop; |
ed697e1aa ALSA: Add SNDRV_P... |
1882 1883 |
case SNDRV_PCM_STATE_PAUSED: continue; |
130755108 [ALSA] PCM - clea... |
1884 1885 |
} if (!tout) { |
09e56df8b ALSA: pcm: Use st... |
1886 1887 1888 1889 |
pcm_dbg(substream->pcm, "%s write error (DMA or IRQ trouble?) ", is_playback ? "playback" : "capture"); |
130755108 [ALSA] PCM - clea... |
1890 1891 1892 |
err = -EIO; break; } |
130755108 [ALSA] PCM - clea... |
1893 1894 |
} _endloop: |
763437a9e ALSA: pcm - fix r... |
1895 |
set_current_state(TASK_RUNNING); |
c91a988dc ALSA: pcm_core: F... |
1896 |
remove_wait_queue(&runtime->tsleep, &wait); |
130755108 [ALSA] PCM - clea... |
1897 1898 1899 1900 |
*availp = avail; return err; } |
877211f5e [ALSA] Remove xxx... |
1901 |
static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1902 1903 1904 1905 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
1906 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1907 1908 1909 1910 1911 1912 1913 |
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 |
1914 1915 1916 1917 1918 1919 |
if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) return -EFAULT; } return 0; } |
877211f5e [ALSA] Remove xxx... |
1920 |
typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4c Linux-2.6.12-rc2 |
1921 1922 |
unsigned long data, unsigned int off, snd_pcm_uframes_t size); |
877211f5e [ALSA] Remove xxx... |
1923 |
static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
1924 1925 1926 1927 1928 |
unsigned long data, snd_pcm_uframes_t size, int nonblock, transfer_f transfer) { |
877211f5e [ALSA] Remove xxx... |
1929 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
1930 1931 |
snd_pcm_uframes_t xfer = 0; snd_pcm_uframes_t offset = 0; |
0910c216f ALSA: pcm - Optim... |
1932 |
snd_pcm_uframes_t avail; |
1da177e4c Linux-2.6.12-rc2 |
1933 1934 1935 1936 |
int err = 0; if (size == 0) return 0; |
1da177e4c Linux-2.6.12-rc2 |
1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 |
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... |
1954 |
runtime->twake = runtime->control->avail_min ? : 1; |
0910c216f ALSA: pcm - Optim... |
1955 1956 1957 |
if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) snd_pcm_update_hw_ptr(substream); avail = snd_pcm_playback_avail(runtime); |
1da177e4c Linux-2.6.12-rc2 |
1958 1959 |
while (size > 0) { snd_pcm_uframes_t frames, appl_ptr, appl_ofs; |
1da177e4c Linux-2.6.12-rc2 |
1960 |
snd_pcm_uframes_t cont; |
130755108 [ALSA] PCM - clea... |
1961 |
if (!avail) { |
1da177e4c Linux-2.6.12-rc2 |
1962 1963 1964 1965 |
if (nonblock) { err = -EAGAIN; goto _end_unlock; } |
5daeba34d ALSA: pcm_lib: av... |
1966 1967 1968 |
runtime->twake = min_t(snd_pcm_uframes_t, size, runtime->control->avail_min ? : 1); err = wait_for_avail(substream, &avail); |
130755108 [ALSA] PCM - clea... |
1969 |
if (err < 0) |
443feb882 [ALSA] ALSA's str... |
1970 |
goto _end_unlock; |
1da177e4c Linux-2.6.12-rc2 |
1971 |
} |
1da177e4c Linux-2.6.12-rc2 |
1972 1973 1974 1975 |
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... |
1976 |
if (snd_BUG_ON(!frames)) { |
c91a988dc ALSA: pcm_core: F... |
1977 |
runtime->twake = 0; |
7eaa943c8 ALSA: Kill snd_as... |
1978 1979 1980 |
snd_pcm_stream_unlock_irq(substream); return -EINVAL; } |
1da177e4c Linux-2.6.12-rc2 |
1981 1982 1983 |
appl_ptr = runtime->control->appl_ptr; appl_ofs = appl_ptr % runtime->buffer_size; snd_pcm_stream_unlock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
1984 |
err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4c Linux-2.6.12-rc2 |
1985 |
snd_pcm_stream_lock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
1986 1987 |
if (err < 0) goto _end_unlock; |
1da177e4c Linux-2.6.12-rc2 |
1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 |
switch (runtime->status->state) { case SNDRV_PCM_STATE_XRUN: err = -EPIPE; goto _end_unlock; case SNDRV_PCM_STATE_SUSPENDED: err = -ESTRPIPE; goto _end_unlock; default: break; } appl_ptr += frames; if (appl_ptr >= runtime->boundary) appl_ptr -= runtime->boundary; runtime->control->appl_ptr = appl_ptr; if (substream->ops->ack) substream->ops->ack(substream); offset += frames; size -= frames; xfer += frames; |
0910c216f ALSA: pcm - Optim... |
2008 |
avail -= frames; |
1da177e4c Linux-2.6.12-rc2 |
2009 2010 2011 2012 2013 2014 |
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 |
2015 2016 |
} _end_unlock: |
c91a988dc ALSA: pcm_core: F... |
2017 |
runtime->twake = 0; |
1250932e4 ALSA: pcm_lib - o... |
2018 2019 |
if (xfer > 0 && err >= 0) snd_pcm_update_state(substream, runtime); |
1da177e4c Linux-2.6.12-rc2 |
2020 |
snd_pcm_stream_unlock_irq(substream); |
1da177e4c Linux-2.6.12-rc2 |
2021 2022 |
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; } |
7eaa943c8 ALSA: Kill snd_as... |
2023 2024 |
/* sanity-check for read/write methods */ static int pcm_sanity_check(struct snd_pcm_substream *substream) |
1da177e4c Linux-2.6.12-rc2 |
2025 |
{ |
877211f5e [ALSA] Remove xxx... |
2026 |
struct snd_pcm_runtime *runtime; |
7eaa943c8 ALSA: Kill snd_as... |
2027 2028 |
if (PCM_RUNTIME_CHECK(substream)) return -ENXIO; |
1da177e4c Linux-2.6.12-rc2 |
2029 |
runtime = substream->runtime; |
7eaa943c8 ALSA: Kill snd_as... |
2030 2031 |
if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
2032 2033 |
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) return -EBADFD; |
7eaa943c8 ALSA: Kill snd_as... |
2034 2035 2036 2037 2038 2039 2040 2041 |
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 |
2042 |
|
7eaa943c8 ALSA: Kill snd_as... |
2043 2044 2045 2046 |
err = pcm_sanity_check(substream); if (err < 0) return err; runtime = substream->runtime; |
0df63e44c [ALSA] Add O_APPE... |
2047 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2048 2049 2050 2051 2052 2053 2054 |
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... |
2055 |
EXPORT_SYMBOL(snd_pcm_lib_write); |
877211f5e [ALSA] Remove xxx... |
2056 |
static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2057 2058 2059 2060 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2061 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2062 2063 2064 2065 2066 |
int err; void __user **bufs = (void __user **)data; int channels = runtime->channels; int c; if (substream->ops->copy) { |
7eaa943c8 ALSA: Kill snd_as... |
2067 2068 |
if (snd_BUG_ON(!substream->ops->silence)) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 |
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 |
2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 |
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... |
2096 |
snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2097 2098 2099 |
void __user **bufs, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2100 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
2101 |
int nonblock; |
7eaa943c8 ALSA: Kill snd_as... |
2102 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
2103 |
|
7eaa943c8 ALSA: Kill snd_as... |
2104 2105 2106 |
err = pcm_sanity_check(substream); if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
2107 |
runtime = substream->runtime; |
0df63e44c [ALSA] Add O_APPE... |
2108 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2109 2110 2111 2112 2113 2114 |
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... |
2115 |
EXPORT_SYMBOL(snd_pcm_lib_writev); |
877211f5e [ALSA] Remove xxx... |
2116 |
static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2117 2118 2119 2120 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2121 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2122 2123 2124 2125 2126 2127 2128 |
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 |
2129 2130 2131 2132 2133 |
if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) return -EFAULT; } return 0; } |
877211f5e [ALSA] Remove xxx... |
2134 |
static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2135 2136 2137 2138 2139 |
unsigned long data, snd_pcm_uframes_t size, int nonblock, transfer_f transfer) { |
877211f5e [ALSA] Remove xxx... |
2140 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2141 2142 |
snd_pcm_uframes_t xfer = 0; snd_pcm_uframes_t offset = 0; |
0910c216f ALSA: pcm - Optim... |
2143 |
snd_pcm_uframes_t avail; |
1da177e4c Linux-2.6.12-rc2 |
2144 2145 2146 2147 |
int err = 0; if (size == 0) return 0; |
1da177e4c Linux-2.6.12-rc2 |
2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 |
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... |
2172 |
runtime->twake = runtime->control->avail_min ? : 1; |
0910c216f ALSA: pcm - Optim... |
2173 2174 2175 |
if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) snd_pcm_update_hw_ptr(substream); avail = snd_pcm_capture_avail(runtime); |
1da177e4c Linux-2.6.12-rc2 |
2176 2177 |
while (size > 0) { snd_pcm_uframes_t frames, appl_ptr, appl_ofs; |
1da177e4c Linux-2.6.12-rc2 |
2178 |
snd_pcm_uframes_t cont; |
130755108 [ALSA] PCM - clea... |
2179 2180 2181 2182 |
if (!avail) { if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1da177e4c Linux-2.6.12-rc2 |
2183 2184 |
goto _end_unlock; } |
1da177e4c Linux-2.6.12-rc2 |
2185 2186 2187 2188 |
if (nonblock) { err = -EAGAIN; goto _end_unlock; } |
5daeba34d ALSA: pcm_lib: av... |
2189 2190 2191 |
runtime->twake = min_t(snd_pcm_uframes_t, size, runtime->control->avail_min ? : 1); err = wait_for_avail(substream, &avail); |
130755108 [ALSA] PCM - clea... |
2192 |
if (err < 0) |
443feb882 [ALSA] ALSA's str... |
2193 |
goto _end_unlock; |
130755108 [ALSA] PCM - clea... |
2194 2195 |
if (!avail) continue; /* draining */ |
1da177e4c Linux-2.6.12-rc2 |
2196 |
} |
1da177e4c Linux-2.6.12-rc2 |
2197 2198 2199 2200 |
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... |
2201 |
if (snd_BUG_ON(!frames)) { |
c91a988dc ALSA: pcm_core: F... |
2202 |
runtime->twake = 0; |
7eaa943c8 ALSA: Kill snd_as... |
2203 2204 2205 |
snd_pcm_stream_unlock_irq(substream); return -EINVAL; } |
1da177e4c Linux-2.6.12-rc2 |
2206 2207 2208 |
appl_ptr = runtime->control->appl_ptr; appl_ofs = appl_ptr % runtime->buffer_size; snd_pcm_stream_unlock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
2209 |
err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4c Linux-2.6.12-rc2 |
2210 |
snd_pcm_stream_lock_irq(substream); |
1250932e4 ALSA: pcm_lib - o... |
2211 2212 |
if (err < 0) goto _end_unlock; |
1da177e4c Linux-2.6.12-rc2 |
2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 |
switch (runtime->status->state) { case SNDRV_PCM_STATE_XRUN: err = -EPIPE; goto _end_unlock; case SNDRV_PCM_STATE_SUSPENDED: err = -ESTRPIPE; goto _end_unlock; default: break; } appl_ptr += frames; if (appl_ptr >= runtime->boundary) appl_ptr -= runtime->boundary; runtime->control->appl_ptr = appl_ptr; if (substream->ops->ack) substream->ops->ack(substream); offset += frames; size -= frames; xfer += frames; |
0910c216f ALSA: pcm - Optim... |
2233 |
avail -= frames; |
1da177e4c Linux-2.6.12-rc2 |
2234 2235 |
} _end_unlock: |
c91a988dc ALSA: pcm_core: F... |
2236 |
runtime->twake = 0; |
1250932e4 ALSA: pcm_lib - o... |
2237 2238 |
if (xfer > 0 && err >= 0) snd_pcm_update_state(substream, runtime); |
1da177e4c Linux-2.6.12-rc2 |
2239 |
snd_pcm_stream_unlock_irq(substream); |
1da177e4c Linux-2.6.12-rc2 |
2240 2241 |
return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; } |
877211f5e [ALSA] Remove xxx... |
2242 |
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 |
2243 |
{ |
877211f5e [ALSA] Remove xxx... |
2244 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
2245 |
int nonblock; |
7eaa943c8 ALSA: Kill snd_as... |
2246 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
2247 |
|
7eaa943c8 ALSA: Kill snd_as... |
2248 2249 2250 |
err = pcm_sanity_check(substream); if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
2251 |
runtime = substream->runtime; |
0df63e44c [ALSA] Add O_APPE... |
2252 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2253 2254 2255 2256 |
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... |
2257 |
EXPORT_SYMBOL(snd_pcm_lib_read); |
877211f5e [ALSA] Remove xxx... |
2258 |
static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2259 2260 2261 2262 |
unsigned int hwoff, unsigned long data, unsigned int off, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2263 |
struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 |
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 |
2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 |
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... |
2294 |
snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4c Linux-2.6.12-rc2 |
2295 2296 2297 |
void __user **bufs, snd_pcm_uframes_t frames) { |
877211f5e [ALSA] Remove xxx... |
2298 |
struct snd_pcm_runtime *runtime; |
1da177e4c Linux-2.6.12-rc2 |
2299 |
int nonblock; |
7eaa943c8 ALSA: Kill snd_as... |
2300 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
2301 |
|
7eaa943c8 ALSA: Kill snd_as... |
2302 2303 2304 |
err = pcm_sanity_check(substream); if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
2305 |
runtime = substream->runtime; |
1da177e4c Linux-2.6.12-rc2 |
2306 2307 |
if (runtime->status->state == SNDRV_PCM_STATE_OPEN) return -EBADFD; |
0df63e44c [ALSA] Add O_APPE... |
2308 |
nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4c Linux-2.6.12-rc2 |
2309 2310 2311 2312 |
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 |
2313 |
EXPORT_SYMBOL(snd_pcm_lib_readv); |
2d3391ec0 ALSA: PCM: channe... |
2314 2315 2316 2317 2318 2319 2320 2321 |
/* * standard channel mapping helpers */ /* default channel maps for multi-channel playbacks, up to 8 channels */ const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { { .channels = 1, |
5efbc2610 ALSA: Fix leftove... |
2322 |
.map = { SNDRV_CHMAP_MONO } }, |
2d3391ec0 ALSA: PCM: channe... |
2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 |
{ .channels = 2, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, { .channels = 4, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, { .channels = 6, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, { .channels = 8, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, { } }; EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { { .channels = 1, |
5efbc2610 ALSA: Fix leftove... |
2344 |
.map = { SNDRV_CHMAP_MONO } }, |
2d3391ec0 ALSA: PCM: channe... |
2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 |
{ .channels = 2, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, { .channels = 4, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, { .channels = 6, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, { .channels = 8, .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, { } }; EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) { if (ch > info->max_channels) return false; return !info->channel_mask || (info->channel_mask & (1U << ch)); } static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; uinfo->count = 0; uinfo->count = info->max_channels; uinfo->value.integer.min = 0; uinfo->value.integer.max = SNDRV_CHMAP_LAST; return 0; } /* get callback for channel map ctl element * stores the channel position firstly matching with the current channels */ static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); struct snd_pcm_substream *substream; const struct snd_pcm_chmap_elem *map; if (snd_BUG_ON(!info->chmap)) return -EINVAL; substream = snd_pcm_chmap_substream(info, idx); if (!substream) return -ENODEV; memset(ucontrol->value.integer.value, 0, sizeof(ucontrol->value.integer.value)); if (!substream->runtime) return 0; /* no channels set */ for (map = info->chmap; map->channels; map++) { int i; if (map->channels == substream->runtime->channels && valid_chmap_channels(info, map->channels)) { for (i = 0; i < map->channels; i++) ucontrol->value.integer.value[i] = map->map[i]; return 0; } } return -EINVAL; } /* tlv callback for channel map ctl element * expands the pre-defined channel maps in a form of TLV */ static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, unsigned int size, unsigned int __user *tlv) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); const struct snd_pcm_chmap_elem *map; unsigned int __user *dst; int c, count = 0; if (snd_BUG_ON(!info->chmap)) return -EINVAL; if (size < 8) return -ENOMEM; if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) return -EFAULT; size -= 8; dst = tlv + 2; for (map = info->chmap; map->channels; map++) { int chs_bytes = map->channels * 4; if (!valid_chmap_channels(info, map->channels)) continue; if (size < 8) return -ENOMEM; if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || put_user(chs_bytes, dst + 1)) return -EFAULT; dst += 2; size -= 8; count += 8; if (size < chs_bytes) return -ENOMEM; size -= chs_bytes; count += chs_bytes; for (c = 0; c < map->channels; c++) { if (put_user(map->map[c], dst)) return -EFAULT; dst++; } } if (put_user(count, tlv + 1)) return -EFAULT; return 0; } static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) { struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); info->pcm->streams[info->stream].chmap_kctl = NULL; kfree(info); } /** * snd_pcm_add_chmap_ctls - create channel-mapping control elements * @pcm: the assigned PCM instance * @stream: stream direction * @chmap: channel map elements (for query) * @max_channels: the max number of channels for the stream * @private_value: the value passed to each kcontrol's private_value field * @info_ret: store struct snd_pcm_chmap instance if non-NULL * * Create channel-mapping control elements assigned to the given PCM stream(s). |
eb7c06e8e ALSA: add/change ... |
2478 |
* Return: Zero if successful, or a negative error value. |
2d3391ec0 ALSA: PCM: channe... |
2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 |
*/ int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, const struct snd_pcm_chmap_elem *chmap, int max_channels, unsigned long private_value, struct snd_pcm_chmap **info_ret) { struct snd_pcm_chmap *info; struct snd_kcontrol_new knew = { .iface = SNDRV_CTL_ELEM_IFACE_PCM, .access = SNDRV_CTL_ELEM_ACCESS_READ | |
2d3391ec0 ALSA: PCM: channe... |
2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 |
SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, .info = pcm_chmap_ctl_info, .get = pcm_chmap_ctl_get, .tlv.c = pcm_chmap_ctl_tlv, }; int err; info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; info->pcm = pcm; info->stream = stream; info->chmap = chmap; info->max_channels = max_channels; if (stream == SNDRV_PCM_STREAM_PLAYBACK) knew.name = "Playback Channel Map"; else knew.name = "Capture Channel Map"; knew.device = pcm->device; knew.count = pcm->streams[stream].substream_count; knew.private_value = private_value; info->kctl = snd_ctl_new1(&knew, info); if (!info->kctl) { kfree(info); return -ENOMEM; } info->kctl->private_free = pcm_chmap_ctl_private_free; err = snd_ctl_add(pcm->card, info->kctl); if (err < 0) return err; pcm->streams[stream].chmap_kctl = info->kctl; if (info_ret) *info_ret = info; return 0; } EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |