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1 | #ifndef __SOUND_PCM_H |
2 | #define __SOUND_PCM_H |
3 | |
4 | /* |
5 | * Digital Audio (PCM) abstract layer |
6 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
7 | * Abramo Bagnara <abramo@alsa-project.org> |
8 | * |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify |
11 | * it under the terms of the GNU General Public License as published by |
12 | * the Free Software Foundation; either version 2 of the License, or |
13 | * (at your option) any later version. |
14 | * |
15 | * This program is distributed in the hope that it will be useful, |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
18 | * GNU General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU General Public License |
21 | * along with this program; if not, write to the Free Software |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
23 | * |
24 | */ |
25 | |
26 | #include <sound/asound.h> |
27 | #include <sound/memalloc.h> |
28 | #include <sound/minors.h> |
29 | #include <linux/poll.h> |
30 | #include <linux/mm.h> |
31 | #include <linux/bitops.h> |
32 | #include <linux/pm_qos_params.h> |
33 | |
34 | #define snd_pcm_substream_chip(substream) ((substream)->private_data) |
35 | #define snd_pcm_chip(pcm) ((pcm)->private_data) |
36 | |
37 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
38 | #include "pcm_oss.h" |
39 | #endif |
40 | |
41 | /* |
42 | * Hardware (lowlevel) section |
43 | */ |
44 | |
45 | struct snd_pcm_hardware { |
46 | unsigned int info; /* SNDRV_PCM_INFO_* */ |
47 | u64 formats; /* SNDRV_PCM_FMTBIT_* */ |
48 | unsigned int rates; /* SNDRV_PCM_RATE_* */ |
49 | unsigned int rate_min; /* min rate */ |
50 | unsigned int rate_max; /* max rate */ |
51 | unsigned int channels_min; /* min channels */ |
52 | unsigned int channels_max; /* max channels */ |
53 | size_t buffer_bytes_max; /* max buffer size */ |
54 | size_t period_bytes_min; /* min period size */ |
55 | size_t period_bytes_max; /* max period size */ |
56 | unsigned int periods_min; /* min # of periods */ |
57 | unsigned int periods_max; /* max # of periods */ |
58 | size_t fifo_size; /* fifo size in bytes */ |
59 | }; |
60 | |
61 | struct snd_pcm_substream; |
62 | |
63 | struct snd_pcm_ops { |
64 | int (*open)(struct snd_pcm_substream *substream); |
65 | int (*close)(struct snd_pcm_substream *substream); |
66 | int (*ioctl)(struct snd_pcm_substream * substream, |
67 | unsigned int cmd, void *arg); |
68 | int (*hw_params)(struct snd_pcm_substream *substream, |
69 | struct snd_pcm_hw_params *params); |
70 | int (*hw_free)(struct snd_pcm_substream *substream); |
71 | int (*prepare)(struct snd_pcm_substream *substream); |
72 | int (*trigger)(struct snd_pcm_substream *substream, int cmd); |
73 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); |
74 | int (*copy)(struct snd_pcm_substream *substream, int channel, |
75 | snd_pcm_uframes_t pos, |
76 | void __user *buf, snd_pcm_uframes_t count); |
77 | int (*silence)(struct snd_pcm_substream *substream, int channel, |
78 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); |
79 | struct page *(*page)(struct snd_pcm_substream *substream, |
80 | unsigned long offset); |
81 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); |
82 | int (*ack)(struct snd_pcm_substream *substream); |
83 | }; |
84 | |
85 | /* |
86 | * |
87 | */ |
88 | |
89 | #if defined(CONFIG_SND_DYNAMIC_MINORS) |
90 | #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) |
91 | #else |
92 | #define SNDRV_PCM_DEVICES 8 |
93 | #endif |
94 | |
95 | #define SNDRV_PCM_IOCTL1_FALSE ((void *)0) |
96 | #define SNDRV_PCM_IOCTL1_TRUE ((void *)1) |
97 | |
98 | #define SNDRV_PCM_IOCTL1_RESET 0 |
99 | #define SNDRV_PCM_IOCTL1_INFO 1 |
100 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 |
101 | #define SNDRV_PCM_IOCTL1_GSTATE 3 |
102 | #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 |
103 | |
104 | #define SNDRV_PCM_TRIGGER_STOP 0 |
105 | #define SNDRV_PCM_TRIGGER_START 1 |
106 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 |
107 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 |
108 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 |
109 | #define SNDRV_PCM_TRIGGER_RESUME 6 |
110 | |
111 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) |
112 | |
113 | /* If you change this don't forget to change rates[] table in pcm_native.c */ |
114 | #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ |
115 | #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ |
116 | #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ |
117 | #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ |
118 | #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ |
119 | #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ |
120 | #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ |
121 | #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ |
122 | #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ |
123 | #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ |
124 | #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ |
125 | #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ |
126 | #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ |
127 | |
128 | #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ |
129 | #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ |
130 | |
131 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ |
132 | SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ |
133 | SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) |
134 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) |
135 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ |
136 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) |
137 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ |
138 | SNDRV_PCM_RATE_192000) |
139 | #define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8) |
140 | #define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8) |
141 | #define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE) |
142 | #define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE) |
143 | #define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE) |
144 | #define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE) |
145 | #define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE) |
146 | #define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE) |
147 | #define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE) |
148 | #define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE) |
149 | #define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE) |
150 | #define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE) |
151 | #define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE) |
152 | #define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE) |
153 | #define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE) |
154 | #define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE) |
155 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE) |
156 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE) |
157 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) |
158 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) |
159 | #define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW) |
160 | #define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW) |
161 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM) |
162 | #define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG) |
163 | #define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM) |
164 | #define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL) |
165 | #define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE) |
166 | #define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE) |
167 | #define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE) |
168 | #define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE) |
169 | #define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE) |
170 | #define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE) |
171 | #define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE) |
172 | #define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE) |
173 | #define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE) |
174 | #define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE) |
175 | #define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE) |
176 | #define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE) |
177 | #define SNDRV_PCM_FMTBIT_G723_24 (1ULL << SNDRV_PCM_FORMAT_G723_24) |
178 | #define SNDRV_PCM_FMTBIT_G723_24_1B (1ULL << SNDRV_PCM_FORMAT_G723_24_1B) |
179 | #define SNDRV_PCM_FMTBIT_G723_40 (1ULL << SNDRV_PCM_FORMAT_G723_40) |
180 | #define SNDRV_PCM_FMTBIT_G723_40_1B (1ULL << SNDRV_PCM_FORMAT_G723_40_1B) |
181 | |
182 | #ifdef SNDRV_LITTLE_ENDIAN |
183 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE |
184 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE |
185 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE |
186 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE |
187 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE |
188 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE |
189 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE |
190 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE |
191 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE |
192 | #endif |
193 | #ifdef SNDRV_BIG_ENDIAN |
194 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE |
195 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE |
196 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE |
197 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE |
198 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE |
199 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE |
200 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE |
201 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE |
202 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE |
203 | #endif |
204 | |
205 | struct snd_pcm_file { |
206 | struct snd_pcm_substream *substream; |
207 | int no_compat_mmap; |
208 | }; |
209 | |
210 | struct snd_pcm_hw_rule; |
211 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, |
212 | struct snd_pcm_hw_rule *rule); |
213 | |
214 | struct snd_pcm_hw_rule { |
215 | unsigned int cond; |
216 | snd_pcm_hw_rule_func_t func; |
217 | int var; |
218 | int deps[4]; |
219 | void *private; |
220 | }; |
221 | |
222 | struct snd_pcm_hw_constraints { |
223 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - |
224 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
225 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
226 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
227 | unsigned int rules_num; |
228 | unsigned int rules_all; |
229 | struct snd_pcm_hw_rule *rules; |
230 | }; |
231 | |
232 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
233 | snd_pcm_hw_param_t var) |
234 | { |
235 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
236 | } |
237 | |
238 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
239 | snd_pcm_hw_param_t var) |
240 | { |
241 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
242 | } |
243 | |
244 | struct snd_ratnum { |
245 | unsigned int num; |
246 | unsigned int den_min, den_max, den_step; |
247 | }; |
248 | |
249 | struct snd_ratden { |
250 | unsigned int num_min, num_max, num_step; |
251 | unsigned int den; |
252 | }; |
253 | |
254 | struct snd_pcm_hw_constraint_ratnums { |
255 | int nrats; |
256 | struct snd_ratnum *rats; |
257 | }; |
258 | |
259 | struct snd_pcm_hw_constraint_ratdens { |
260 | int nrats; |
261 | struct snd_ratden *rats; |
262 | }; |
263 | |
264 | struct snd_pcm_hw_constraint_list { |
265 | unsigned int count; |
266 | unsigned int *list; |
267 | unsigned int mask; |
268 | }; |
269 | |
270 | struct snd_pcm_hwptr_log; |
271 | |
272 | struct snd_pcm_runtime { |
273 | /* -- Status -- */ |
274 | struct snd_pcm_substream *trigger_master; |
275 | struct timespec trigger_tstamp; /* trigger timestamp */ |
276 | int overrange; |
277 | snd_pcm_uframes_t avail_max; |
278 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ |
279 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ |
280 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ |
281 | unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ |
282 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ |
283 | |
284 | /* -- HW params -- */ |
285 | snd_pcm_access_t access; /* access mode */ |
286 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ |
287 | snd_pcm_subformat_t subformat; /* subformat */ |
288 | unsigned int rate; /* rate in Hz */ |
289 | unsigned int channels; /* channels */ |
290 | snd_pcm_uframes_t period_size; /* period size */ |
291 | unsigned int periods; /* periods */ |
292 | snd_pcm_uframes_t buffer_size; /* buffer size */ |
293 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
294 | size_t byte_align; |
295 | unsigned int frame_bits; |
296 | unsigned int sample_bits; |
297 | unsigned int info; |
298 | unsigned int rate_num; |
299 | unsigned int rate_den; |
300 | |
301 | /* -- SW params -- */ |
302 | int tstamp_mode; /* mmap timestamp is updated */ |
303 | unsigned int period_step; |
304 | snd_pcm_uframes_t start_threshold; |
305 | snd_pcm_uframes_t stop_threshold; |
306 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when |
307 | noise is nearest than this */ |
308 | snd_pcm_uframes_t silence_size; /* Silence filling size */ |
309 | snd_pcm_uframes_t boundary; /* pointers wrap point */ |
310 | |
311 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ |
312 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ |
313 | |
314 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
315 | |
316 | /* -- mmap -- */ |
317 | struct snd_pcm_mmap_status *status; |
318 | struct snd_pcm_mmap_control *control; |
319 | |
320 | /* -- locking / scheduling -- */ |
321 | snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ |
322 | wait_queue_head_t sleep; /* poll sleep */ |
323 | wait_queue_head_t tsleep; /* transfer sleep */ |
324 | struct fasync_struct *fasync; |
325 | |
326 | /* -- private section -- */ |
327 | void *private_data; |
328 | void (*private_free)(struct snd_pcm_runtime *runtime); |
329 | |
330 | /* -- hardware description -- */ |
331 | struct snd_pcm_hardware hw; |
332 | struct snd_pcm_hw_constraints hw_constraints; |
333 | |
334 | /* -- interrupt callbacks -- */ |
335 | void (*transfer_ack_begin)(struct snd_pcm_substream *substream); |
336 | void (*transfer_ack_end)(struct snd_pcm_substream *substream); |
337 | |
338 | /* -- timer -- */ |
339 | unsigned int timer_resolution; /* timer resolution */ |
340 | int tstamp_type; /* timestamp type */ |
341 | |
342 | /* -- DMA -- */ |
343 | unsigned char *dma_area; /* DMA area */ |
344 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ |
345 | size_t dma_bytes; /* size of DMA area */ |
346 | |
347 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ |
348 | |
349 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
350 | /* -- OSS things -- */ |
351 | struct snd_pcm_oss_runtime oss; |
352 | #endif |
353 | |
354 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
355 | struct snd_pcm_hwptr_log *hwptr_log; |
356 | #endif |
357 | }; |
358 | |
359 | struct snd_pcm_group { /* keep linked substreams */ |
360 | spinlock_t lock; |
361 | struct list_head substreams; |
362 | int count; |
363 | }; |
364 | |
365 | struct pid; |
366 | |
367 | struct snd_pcm_substream { |
368 | struct snd_pcm *pcm; |
369 | struct snd_pcm_str *pstr; |
370 | void *private_data; /* copied from pcm->private_data */ |
371 | int number; |
372 | char name[32]; /* substream name */ |
373 | int stream; /* stream (direction) */ |
374 | struct pm_qos_request_list latency_pm_qos_req; /* pm_qos request */ |
375 | size_t buffer_bytes_max; /* limit ring buffer size */ |
376 | struct snd_dma_buffer dma_buffer; |
377 | unsigned int dma_buf_id; |
378 | size_t dma_max; |
379 | /* -- hardware operations -- */ |
380 | struct snd_pcm_ops *ops; |
381 | /* -- runtime information -- */ |
382 | struct snd_pcm_runtime *runtime; |
383 | /* -- timer section -- */ |
384 | struct snd_timer *timer; /* timer */ |
385 | unsigned timer_running: 1; /* time is running */ |
386 | /* -- next substream -- */ |
387 | struct snd_pcm_substream *next; |
388 | /* -- linked substreams -- */ |
389 | struct list_head link_list; /* linked list member */ |
390 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
391 | struct snd_pcm_group *group; /* pointer to current group */ |
392 | /* -- assigned files -- */ |
393 | void *file; |
394 | int ref_count; |
395 | atomic_t mmap_count; |
396 | unsigned int f_flags; |
397 | void (*pcm_release)(struct snd_pcm_substream *); |
398 | struct pid *pid; |
399 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
400 | /* -- OSS things -- */ |
401 | struct snd_pcm_oss_substream oss; |
402 | #endif |
403 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
404 | struct snd_info_entry *proc_root; |
405 | struct snd_info_entry *proc_info_entry; |
406 | struct snd_info_entry *proc_hw_params_entry; |
407 | struct snd_info_entry *proc_sw_params_entry; |
408 | struct snd_info_entry *proc_status_entry; |
409 | struct snd_info_entry *proc_prealloc_entry; |
410 | struct snd_info_entry *proc_prealloc_max_entry; |
411 | #endif |
412 | /* misc flags */ |
413 | unsigned int hw_opened: 1; |
414 | }; |
415 | |
416 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
417 | |
418 | |
419 | struct snd_pcm_str { |
420 | int stream; /* stream (direction) */ |
421 | struct snd_pcm *pcm; |
422 | /* -- substreams -- */ |
423 | unsigned int substream_count; |
424 | unsigned int substream_opened; |
425 | struct snd_pcm_substream *substream; |
426 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
427 | /* -- OSS things -- */ |
428 | struct snd_pcm_oss_stream oss; |
429 | #endif |
430 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
431 | struct snd_info_entry *proc_root; |
432 | struct snd_info_entry *proc_info_entry; |
433 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
434 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
435 | struct snd_info_entry *proc_xrun_debug_entry; |
436 | #endif |
437 | #endif |
438 | }; |
439 | |
440 | struct snd_pcm { |
441 | struct snd_card *card; |
442 | struct list_head list; |
443 | int device; /* device number */ |
444 | unsigned int info_flags; |
445 | unsigned short dev_class; |
446 | unsigned short dev_subclass; |
447 | char id[64]; |
448 | char name[80]; |
449 | struct snd_pcm_str streams[2]; |
450 | struct mutex open_mutex; |
451 | wait_queue_head_t open_wait; |
452 | void *private_data; |
453 | void (*private_free) (struct snd_pcm *pcm); |
454 | struct device *dev; /* actual hw device this belongs to */ |
455 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
456 | struct snd_pcm_oss oss; |
457 | #endif |
458 | }; |
459 | |
460 | struct snd_pcm_notify { |
461 | int (*n_register) (struct snd_pcm * pcm); |
462 | int (*n_disconnect) (struct snd_pcm * pcm); |
463 | int (*n_unregister) (struct snd_pcm * pcm); |
464 | struct list_head list; |
465 | }; |
466 | |
467 | /* |
468 | * Registering |
469 | */ |
470 | |
471 | extern const struct file_operations snd_pcm_f_ops[2]; |
472 | |
473 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
474 | int playback_count, int capture_count, |
475 | struct snd_pcm **rpcm); |
476 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); |
477 | |
478 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
479 | |
480 | /* |
481 | * Native I/O |
482 | */ |
483 | |
484 | extern rwlock_t snd_pcm_link_rwlock; |
485 | |
486 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
487 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
488 | struct snd_pcm_info __user *info); |
489 | int snd_pcm_status(struct snd_pcm_substream *substream, |
490 | struct snd_pcm_status *status); |
491 | int snd_pcm_start(struct snd_pcm_substream *substream); |
492 | int snd_pcm_stop(struct snd_pcm_substream *substream, int status); |
493 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); |
494 | #ifdef CONFIG_PM |
495 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
496 | int snd_pcm_suspend_all(struct snd_pcm *pcm); |
497 | #endif |
498 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
499 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
500 | struct snd_pcm_substream **rsubstream); |
501 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
502 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
503 | struct snd_pcm_substream **rsubstream); |
504 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); |
505 | void snd_pcm_vma_notify_data(void *client, void *data); |
506 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
507 | |
508 | /* |
509 | * PCM library |
510 | */ |
511 | |
512 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
513 | { |
514 | return substream->group != &substream->self_group; |
515 | } |
516 | |
517 | static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
518 | { |
519 | read_lock(&snd_pcm_link_rwlock); |
520 | spin_lock(&substream->self_group.lock); |
521 | } |
522 | |
523 | static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
524 | { |
525 | spin_unlock(&substream->self_group.lock); |
526 | read_unlock(&snd_pcm_link_rwlock); |
527 | } |
528 | |
529 | static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
530 | { |
531 | read_lock_irq(&snd_pcm_link_rwlock); |
532 | spin_lock(&substream->self_group.lock); |
533 | } |
534 | |
535 | static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
536 | { |
537 | spin_unlock(&substream->self_group.lock); |
538 | read_unlock_irq(&snd_pcm_link_rwlock); |
539 | } |
540 | |
541 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ |
542 | do { \ |
543 | read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ |
544 | spin_lock(&substream->self_group.lock); \ |
545 | } while (0) |
546 | |
547 | #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ |
548 | do { \ |
549 | spin_unlock(&substream->self_group.lock); \ |
550 | read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ |
551 | } while (0) |
552 | |
553 | #define snd_pcm_group_for_each_entry(s, substream) \ |
554 | list_for_each_entry(s, &substream->group->substreams, link_list) |
555 | |
556 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
557 | { |
558 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || |
559 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && |
560 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); |
561 | } |
562 | |
563 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
564 | { |
565 | return size * 8 / runtime->sample_bits; |
566 | } |
567 | |
568 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
569 | { |
570 | return size * 8 / runtime->frame_bits; |
571 | } |
572 | |
573 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
574 | { |
575 | return size * runtime->sample_bits / 8; |
576 | } |
577 | |
578 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
579 | { |
580 | return size * runtime->frame_bits / 8; |
581 | } |
582 | |
583 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
584 | { |
585 | return bytes % runtime->byte_align == 0; |
586 | } |
587 | |
588 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
589 | { |
590 | struct snd_pcm_runtime *runtime = substream->runtime; |
591 | return frames_to_bytes(runtime, runtime->buffer_size); |
592 | } |
593 | |
594 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
595 | { |
596 | struct snd_pcm_runtime *runtime = substream->runtime; |
597 | return frames_to_bytes(runtime, runtime->period_size); |
598 | } |
599 | |
600 | /* |
601 | * result is: 0 ... (boundary - 1) |
602 | */ |
603 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
604 | { |
605 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; |
606 | if (avail < 0) |
607 | avail += runtime->boundary; |
608 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) |
609 | avail -= runtime->boundary; |
610 | return avail; |
611 | } |
612 | |
613 | /* |
614 | * result is: 0 ... (boundary - 1) |
615 | */ |
616 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
617 | { |
618 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; |
619 | if (avail < 0) |
620 | avail += runtime->boundary; |
621 | return avail; |
622 | } |
623 | |
624 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
625 | { |
626 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); |
627 | } |
628 | |
629 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
630 | { |
631 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); |
632 | } |
633 | |
634 | /** |
635 | * snd_pcm_playback_ready - check whether the playback buffer is available |
636 | * @substream: the pcm substream instance |
637 | * |
638 | * Checks whether enough free space is available on the playback buffer. |
639 | * |
640 | * Returns non-zero if available, or zero if not. |
641 | */ |
642 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
643 | { |
644 | struct snd_pcm_runtime *runtime = substream->runtime; |
645 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
646 | } |
647 | |
648 | /** |
649 | * snd_pcm_capture_ready - check whether the capture buffer is available |
650 | * @substream: the pcm substream instance |
651 | * |
652 | * Checks whether enough capture data is available on the capture buffer. |
653 | * |
654 | * Returns non-zero if available, or zero if not. |
655 | */ |
656 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
657 | { |
658 | struct snd_pcm_runtime *runtime = substream->runtime; |
659 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
660 | } |
661 | |
662 | /** |
663 | * snd_pcm_playback_data - check whether any data exists on the playback buffer |
664 | * @substream: the pcm substream instance |
665 | * |
666 | * Checks whether any data exists on the playback buffer. If stop_threshold |
667 | * is bigger or equal to boundary, then this function returns always non-zero. |
668 | * |
669 | * Returns non-zero if exists, or zero if not. |
670 | */ |
671 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
672 | { |
673 | struct snd_pcm_runtime *runtime = substream->runtime; |
674 | |
675 | if (runtime->stop_threshold >= runtime->boundary) |
676 | return 1; |
677 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; |
678 | } |
679 | |
680 | /** |
681 | * snd_pcm_playback_empty - check whether the playback buffer is empty |
682 | * @substream: the pcm substream instance |
683 | * |
684 | * Checks whether the playback buffer is empty. |
685 | * |
686 | * Returns non-zero if empty, or zero if not. |
687 | */ |
688 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
689 | { |
690 | struct snd_pcm_runtime *runtime = substream->runtime; |
691 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
692 | } |
693 | |
694 | /** |
695 | * snd_pcm_capture_empty - check whether the capture buffer is empty |
696 | * @substream: the pcm substream instance |
697 | * |
698 | * Checks whether the capture buffer is empty. |
699 | * |
700 | * Returns non-zero if empty, or zero if not. |
701 | */ |
702 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
703 | { |
704 | struct snd_pcm_runtime *runtime = substream->runtime; |
705 | return snd_pcm_capture_avail(runtime) == 0; |
706 | } |
707 | |
708 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
709 | struct snd_pcm_substream *master) |
710 | { |
711 | substream->runtime->trigger_master = master; |
712 | } |
713 | |
714 | static inline int hw_is_mask(int var) |
715 | { |
716 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && |
717 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; |
718 | } |
719 | |
720 | static inline int hw_is_interval(int var) |
721 | { |
722 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && |
723 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; |
724 | } |
725 | |
726 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
727 | snd_pcm_hw_param_t var) |
728 | { |
729 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
730 | } |
731 | |
732 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
733 | snd_pcm_hw_param_t var) |
734 | { |
735 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
736 | } |
737 | |
738 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
739 | snd_pcm_hw_param_t var) |
740 | { |
741 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
742 | } |
743 | |
744 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
745 | snd_pcm_hw_param_t var) |
746 | { |
747 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
748 | } |
749 | |
750 | #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) |
751 | #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) |
752 | #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) |
753 | #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min |
754 | #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min |
755 | #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min |
756 | #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) |
757 | #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min |
758 | #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min |
759 | #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min |
760 | |
761 | |
762 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
763 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); |
764 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); |
765 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
766 | unsigned int k, struct snd_interval *c); |
767 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
768 | const struct snd_interval *b, struct snd_interval *c); |
769 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); |
770 | int snd_interval_ratnum(struct snd_interval *i, |
771 | unsigned int rats_count, struct snd_ratnum *rats, |
772 | unsigned int *nump, unsigned int *denp); |
773 | |
774 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
775 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); |
776 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
777 | |
778 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
779 | |
780 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
781 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); |
782 | |
783 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
784 | u_int32_t mask); |
785 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
786 | u_int64_t mask); |
787 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
788 | unsigned int min, unsigned int max); |
789 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
790 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
791 | unsigned int cond, |
792 | snd_pcm_hw_param_t var, |
793 | struct snd_pcm_hw_constraint_list *l); |
794 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
795 | unsigned int cond, |
796 | snd_pcm_hw_param_t var, |
797 | struct snd_pcm_hw_constraint_ratnums *r); |
798 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
799 | unsigned int cond, |
800 | snd_pcm_hw_param_t var, |
801 | struct snd_pcm_hw_constraint_ratdens *r); |
802 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
803 | unsigned int cond, |
804 | unsigned int width, |
805 | unsigned int msbits); |
806 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
807 | unsigned int cond, |
808 | snd_pcm_hw_param_t var, |
809 | unsigned long step); |
810 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
811 | unsigned int cond, |
812 | snd_pcm_hw_param_t var); |
813 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
814 | unsigned int cond, |
815 | int var, |
816 | snd_pcm_hw_rule_func_t func, void *private, |
817 | int dep, ...); |
818 | |
819 | int snd_pcm_format_signed(snd_pcm_format_t format); |
820 | int snd_pcm_format_unsigned(snd_pcm_format_t format); |
821 | int snd_pcm_format_linear(snd_pcm_format_t format); |
822 | int snd_pcm_format_little_endian(snd_pcm_format_t format); |
823 | int snd_pcm_format_big_endian(snd_pcm_format_t format); |
824 | #if 0 /* just for DocBook */ |
825 | /** |
826 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
827 | * @format: the format to check |
828 | * |
829 | * Returns 1 if the given PCM format is CPU-endian, 0 if |
830 | * opposite, or a negative error code if endian not specified. |
831 | */ |
832 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
833 | #endif /* DocBook */ |
834 | #ifdef SNDRV_LITTLE_ENDIAN |
835 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
836 | #else |
837 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
838 | #endif |
839 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
840 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ |
841 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
842 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
843 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); |
844 | snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); |
845 | |
846 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); |
847 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); |
848 | int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); |
849 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
850 | unsigned int cmd, void *arg); |
851 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
852 | struct snd_pcm_runtime *runtime); |
853 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
854 | int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); |
855 | int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); |
856 | int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); |
857 | int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); |
858 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); |
859 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
860 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, |
861 | const void __user *buf, |
862 | snd_pcm_uframes_t frames); |
863 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
864 | void __user *buf, snd_pcm_uframes_t frames); |
865 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
866 | void __user **bufs, snd_pcm_uframes_t frames); |
867 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
868 | void __user **bufs, snd_pcm_uframes_t frames); |
869 | |
870 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
871 | |
872 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
873 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
874 | |
875 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
876 | struct snd_dma_buffer *bufp) |
877 | { |
878 | struct snd_pcm_runtime *runtime = substream->runtime; |
879 | if (bufp) { |
880 | runtime->dma_buffer_p = bufp; |
881 | runtime->dma_area = bufp->area; |
882 | runtime->dma_addr = bufp->addr; |
883 | runtime->dma_bytes = bufp->bytes; |
884 | } else { |
885 | runtime->dma_buffer_p = NULL; |
886 | runtime->dma_area = NULL; |
887 | runtime->dma_addr = 0; |
888 | runtime->dma_bytes = 0; |
889 | } |
890 | } |
891 | |
892 | /* |
893 | * Timer interface |
894 | */ |
895 | |
896 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
897 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); |
898 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); |
899 | |
900 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
901 | struct timespec *tv) |
902 | { |
903 | if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) |
904 | do_posix_clock_monotonic_gettime(tv); |
905 | else |
906 | getnstimeofday(tv); |
907 | } |
908 | |
909 | /* |
910 | * Memory |
911 | */ |
912 | |
913 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
914 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); |
915 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, |
916 | int type, struct device *data, |
917 | size_t size, size_t max); |
918 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
919 | int type, void *data, |
920 | size_t size, size_t max); |
921 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
922 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); |
923 | |
924 | int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, |
925 | size_t size, gfp_t gfp_flags); |
926 | int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); |
927 | struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, |
928 | unsigned long offset); |
929 | #if 0 /* for kernel-doc */ |
930 | /** |
931 | * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer |
932 | * @substream: the substream to allocate the buffer to |
933 | * @size: the requested buffer size, in bytes |
934 | * |
935 | * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is |
936 | * contiguous in kernel virtual space, but not in physical memory. Use this |
937 | * if the buffer is accessed by kernel code but not by device DMA. |
938 | * |
939 | * Returns 1 if the buffer was changed, 0 if not changed, or a negative error |
940 | * code. |
941 | */ |
942 | static int snd_pcm_lib_alloc_vmalloc_buffer |
943 | (struct snd_pcm_substream *substream, size_t size); |
944 | /** |
945 | * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer |
946 | * @substream: the substream to allocate the buffer to |
947 | * @size: the requested buffer size, in bytes |
948 | * |
949 | * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses |
950 | * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. |
951 | */ |
952 | static int snd_pcm_lib_alloc_vmalloc_32_buffer |
953 | (struct snd_pcm_substream *substream, size_t size); |
954 | #endif |
955 | #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ |
956 | _snd_pcm_lib_alloc_vmalloc_buffer \ |
957 | (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) |
958 | #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ |
959 | _snd_pcm_lib_alloc_vmalloc_buffer \ |
960 | (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) |
961 | |
962 | #ifdef CONFIG_SND_DMA_SGBUF |
963 | /* |
964 | * SG-buffer handling |
965 | */ |
966 | #define snd_pcm_substream_sgbuf(substream) \ |
967 | ((substream)->runtime->dma_buffer_p->private_data) |
968 | |
969 | static inline dma_addr_t |
970 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) |
971 | { |
972 | struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); |
973 | return snd_sgbuf_get_addr(sg, ofs); |
974 | } |
975 | |
976 | static inline void * |
977 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) |
978 | { |
979 | struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); |
980 | return snd_sgbuf_get_ptr(sg, ofs); |
981 | } |
982 | |
983 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, |
984 | unsigned long offset); |
985 | unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, |
986 | unsigned int ofs, unsigned int size); |
987 | |
988 | #else /* !SND_DMA_SGBUF */ |
989 | /* |
990 | * fake using a continuous buffer |
991 | */ |
992 | static inline dma_addr_t |
993 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) |
994 | { |
995 | return substream->runtime->dma_addr + ofs; |
996 | } |
997 | |
998 | static inline void * |
999 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) |
1000 | { |
1001 | return substream->runtime->dma_area + ofs; |
1002 | } |
1003 | |
1004 | #define snd_pcm_sgbuf_ops_page NULL |
1005 | |
1006 | #define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size) |
1007 | |
1008 | #endif /* SND_DMA_SGBUF */ |
1009 | |
1010 | /* handle mmap counter - PCM mmap callback should handle this counter properly */ |
1011 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) |
1012 | { |
1013 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
1014 | atomic_inc(&substream->mmap_count); |
1015 | } |
1016 | |
1017 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) |
1018 | { |
1019 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
1020 | atomic_dec(&substream->mmap_count); |
1021 | } |
1022 | |
1023 | /* mmap for io-memory area */ |
1024 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) |
1025 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP |
1026 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
1027 | #else |
1028 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 |
1029 | #define snd_pcm_lib_mmap_iomem NULL |
1030 | #endif |
1031 | |
1032 | int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, |
1033 | struct vm_area_struct *area); |
1034 | #define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached |
1035 | |
1036 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) |
1037 | { |
1038 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; |
1039 | } |
1040 | |
1041 | /* |
1042 | * Misc |
1043 | */ |
1044 | |
1045 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ |
1046 | (IEC958_AES1_CON_ORIGINAL<<8)|\ |
1047 | (IEC958_AES1_CON_PCM_CODER<<8)|\ |
1048 | (IEC958_AES3_CON_FS_48000<<24)) |
1049 | |
1050 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) |
1051 | |
1052 | const char *snd_pcm_format_name(snd_pcm_format_t format); |
1053 | |
1054 | #endif /* __SOUND_PCM_H */ |
1055 |
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