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Source at commit e697a163d98ef40d618048a2f26d18f026d4a98d created 14 years 3 months ago. By xiangfu, 105-sound.patch | |
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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 | |
33 | #define snd_pcm_substream_chip(substream) ((substream)->private_data) |
34 | #define snd_pcm_chip(pcm) ((pcm)->private_data) |
35 | |
36 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
37 | #include "pcm_oss.h" |
38 | #endif |
39 | |
40 | /* |
41 | * Hardware (lowlevel) section |
42 | */ |
43 | |
44 | struct snd_pcm_hardware { |
45 | unsigned int info; /* SNDRV_PCM_INFO_* */ |
46 | u64 formats; /* SNDRV_PCM_FMTBIT_* */ |
47 | unsigned int rates; /* SNDRV_PCM_RATE_* */ |
48 | unsigned int rate_min; /* min rate */ |
49 | unsigned int rate_max; /* max rate */ |
50 | unsigned int channels_min; /* min channels */ |
51 | unsigned int channels_max; /* max channels */ |
52 | size_t buffer_bytes_max; /* max buffer size */ |
53 | size_t period_bytes_min; /* min period size */ |
54 | size_t period_bytes_max; /* max period size */ |
55 | unsigned int periods_min; /* min # of periods */ |
56 | unsigned int periods_max; /* max # of periods */ |
57 | size_t fifo_size; /* fifo size in bytes */ |
58 | }; |
59 | |
60 | struct snd_pcm_substream; |
61 | |
62 | struct snd_pcm_ops { |
63 | int (*open)(struct snd_pcm_substream *substream); |
64 | int (*close)(struct snd_pcm_substream *substream); |
65 | int (*ioctl)(struct snd_pcm_substream * substream, |
66 | unsigned int cmd, void *arg); |
67 | int (*hw_params)(struct snd_pcm_substream *substream, |
68 | struct snd_pcm_hw_params *params); |
69 | int (*hw_free)(struct snd_pcm_substream *substream); |
70 | int (*prepare)(struct snd_pcm_substream *substream); |
71 | int (*trigger)(struct snd_pcm_substream *substream, int cmd); |
72 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); |
73 | int (*copy)(struct snd_pcm_substream *substream, int channel, |
74 | snd_pcm_uframes_t pos, |
75 | void __user *buf, snd_pcm_uframes_t count); |
76 | int (*silence)(struct snd_pcm_substream *substream, int channel, |
77 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); |
78 | struct page *(*page)(struct snd_pcm_substream *substream, |
79 | unsigned long offset); |
80 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); |
81 | int (*ack)(struct snd_pcm_substream *substream); |
82 | }; |
83 | |
84 | /* |
85 | * |
86 | */ |
87 | |
88 | #if defined(CONFIG_SND_DYNAMIC_MINORS) |
89 | #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) |
90 | #else |
91 | #define SNDRV_PCM_DEVICES 8 |
92 | #endif |
93 | |
94 | #define SNDRV_PCM_IOCTL1_FALSE ((void *)0) |
95 | #define SNDRV_PCM_IOCTL1_TRUE ((void *)1) |
96 | |
97 | #define SNDRV_PCM_IOCTL1_RESET 0 |
98 | #define SNDRV_PCM_IOCTL1_INFO 1 |
99 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 |
100 | #define SNDRV_PCM_IOCTL1_GSTATE 3 |
101 | #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 |
102 | |
103 | #define SNDRV_PCM_TRIGGER_STOP 0 |
104 | #define SNDRV_PCM_TRIGGER_START 1 |
105 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 |
106 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 |
107 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 |
108 | #define SNDRV_PCM_TRIGGER_RESUME 6 |
109 | |
110 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) |
111 | |
112 | /* If you change this don't forget to change rates[] table in pcm_native.c */ |
113 | #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ |
114 | #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ |
115 | #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ |
116 | #define SNDRV_PCM_RATE_12000 (1<<3) /* 12000Hz */ |
117 | #define SNDRV_PCM_RATE_16000 (1<<4) /* 16000Hz */ |
118 | #define SNDRV_PCM_RATE_22050 (1<<5) /* 22050Hz */ |
119 | #define SNDRV_PCM_RATE_24000 (1<<6) /* 24000Hz */ |
120 | #define SNDRV_PCM_RATE_32000 (1<<7) /* 32000Hz */ |
121 | #define SNDRV_PCM_RATE_44100 (1<<8) /* 44100Hz */ |
122 | #define SNDRV_PCM_RATE_48000 (1<<9) /* 48000Hz */ |
123 | #define SNDRV_PCM_RATE_64000 (1<<10) /* 64000Hz */ |
124 | #define SNDRV_PCM_RATE_88200 (1<<11) /* 88200Hz */ |
125 | #define SNDRV_PCM_RATE_96000 (1<<12) /* 96000Hz */ |
126 | #define SNDRV_PCM_RATE_176400 (1<<13) /* 176400Hz */ |
127 | #define SNDRV_PCM_RATE_192000 (1<<14) /* 192000Hz */ |
128 | |
129 | #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ |
130 | #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ |
131 | |
132 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|SNDRV_PCM_RATE_12000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|SNDRV_PCM_RATE_24000|SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) |
133 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) |
134 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ |
135 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) |
136 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ |
137 | SNDRV_PCM_RATE_192000) |
138 | #define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8) |
139 | #define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8) |
140 | #define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE) |
141 | #define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE) |
142 | #define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE) |
143 | #define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE) |
144 | #define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE) |
145 | #define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE) |
146 | #define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE) |
147 | #define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE) |
148 | #define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE) |
149 | #define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE) |
150 | #define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE) |
151 | #define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE) |
152 | #define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE) |
153 | #define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE) |
154 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE) |
155 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE) |
156 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) |
157 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) |
158 | #define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW) |
159 | #define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW) |
160 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM) |
161 | #define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG) |
162 | #define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM) |
163 | #define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL) |
164 | #define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE) |
165 | #define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE) |
166 | #define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE) |
167 | #define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE) |
168 | #define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE) |
169 | #define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE) |
170 | #define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE) |
171 | #define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE) |
172 | #define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE) |
173 | #define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE) |
174 | #define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE) |
175 | #define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE) |
176 | |
177 | #ifdef SNDRV_LITTLE_ENDIAN |
178 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE |
179 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE |
180 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE |
181 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE |
182 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE |
183 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE |
184 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE |
185 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE |
186 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE |
187 | #endif |
188 | #ifdef SNDRV_BIG_ENDIAN |
189 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE |
190 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE |
191 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE |
192 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE |
193 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE |
194 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE |
195 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE |
196 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE |
197 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE |
198 | #endif |
199 | |
200 | struct snd_pcm_file { |
201 | struct snd_pcm_substream *substream; |
202 | int no_compat_mmap; |
203 | }; |
204 | |
205 | struct snd_pcm_hw_rule; |
206 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, |
207 | struct snd_pcm_hw_rule *rule); |
208 | |
209 | struct snd_pcm_hw_rule { |
210 | unsigned int cond; |
211 | snd_pcm_hw_rule_func_t func; |
212 | int var; |
213 | int deps[4]; |
214 | void *private; |
215 | }; |
216 | |
217 | struct snd_pcm_hw_constraints { |
218 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - |
219 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
220 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
221 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
222 | unsigned int rules_num; |
223 | unsigned int rules_all; |
224 | struct snd_pcm_hw_rule *rules; |
225 | }; |
226 | |
227 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
228 | snd_pcm_hw_param_t var) |
229 | { |
230 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
231 | } |
232 | |
233 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
234 | snd_pcm_hw_param_t var) |
235 | { |
236 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
237 | } |
238 | |
239 | struct snd_ratnum { |
240 | unsigned int num; |
241 | unsigned int den_min, den_max, den_step; |
242 | }; |
243 | |
244 | struct snd_ratden { |
245 | unsigned int num_min, num_max, num_step; |
246 | unsigned int den; |
247 | }; |
248 | |
249 | struct snd_pcm_hw_constraint_ratnums { |
250 | int nrats; |
251 | struct snd_ratnum *rats; |
252 | }; |
253 | |
254 | struct snd_pcm_hw_constraint_ratdens { |
255 | int nrats; |
256 | struct snd_ratden *rats; |
257 | }; |
258 | |
259 | struct snd_pcm_hw_constraint_list { |
260 | unsigned int count; |
261 | unsigned int *list; |
262 | unsigned int mask; |
263 | }; |
264 | |
265 | struct snd_pcm_runtime { |
266 | /* -- Status -- */ |
267 | struct snd_pcm_substream *trigger_master; |
268 | struct timespec trigger_tstamp; /* trigger timestamp */ |
269 | int overrange; |
270 | snd_pcm_uframes_t avail_max; |
271 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ |
272 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ |
273 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ |
274 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ |
275 | |
276 | /* -- HW params -- */ |
277 | snd_pcm_access_t access; /* access mode */ |
278 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ |
279 | snd_pcm_subformat_t subformat; /* subformat */ |
280 | unsigned int rate; /* rate in Hz */ |
281 | unsigned int channels; /* channels */ |
282 | snd_pcm_uframes_t period_size; /* period size */ |
283 | unsigned int periods; /* periods */ |
284 | snd_pcm_uframes_t buffer_size; /* buffer size */ |
285 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
286 | size_t byte_align; |
287 | unsigned int frame_bits; |
288 | unsigned int sample_bits; |
289 | unsigned int info; |
290 | unsigned int rate_num; |
291 | unsigned int rate_den; |
292 | |
293 | /* -- SW params -- */ |
294 | int tstamp_mode; /* mmap timestamp is updated */ |
295 | unsigned int period_step; |
296 | snd_pcm_uframes_t start_threshold; |
297 | snd_pcm_uframes_t stop_threshold; |
298 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when |
299 | noise is nearest than this */ |
300 | snd_pcm_uframes_t silence_size; /* Silence filling size */ |
301 | snd_pcm_uframes_t boundary; /* pointers wrap point */ |
302 | |
303 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ |
304 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ |
305 | |
306 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
307 | |
308 | /* -- mmap -- */ |
309 | struct snd_pcm_mmap_status *status; |
310 | struct snd_pcm_mmap_control *control; |
311 | |
312 | /* -- locking / scheduling -- */ |
313 | wait_queue_head_t sleep; |
314 | struct fasync_struct *fasync; |
315 | |
316 | /* -- private section -- */ |
317 | void *private_data; |
318 | void (*private_free)(struct snd_pcm_runtime *runtime); |
319 | |
320 | /* -- hardware description -- */ |
321 | struct snd_pcm_hardware hw; |
322 | struct snd_pcm_hw_constraints hw_constraints; |
323 | |
324 | /* -- interrupt callbacks -- */ |
325 | void (*transfer_ack_begin)(struct snd_pcm_substream *substream); |
326 | void (*transfer_ack_end)(struct snd_pcm_substream *substream); |
327 | |
328 | /* -- timer -- */ |
329 | unsigned int timer_resolution; /* timer resolution */ |
330 | int tstamp_type; /* timestamp type */ |
331 | |
332 | /* -- DMA -- */ |
333 | unsigned char *dma_area; /* DMA area */ |
334 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ |
335 | size_t dma_bytes; /* size of DMA area */ |
336 | |
337 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ |
338 | |
339 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
340 | /* -- OSS things -- */ |
341 | struct snd_pcm_oss_runtime oss; |
342 | #endif |
343 | }; |
344 | |
345 | struct snd_pcm_group { /* keep linked substreams */ |
346 | spinlock_t lock; |
347 | struct list_head substreams; |
348 | int count; |
349 | }; |
350 | |
351 | struct snd_pcm_substream { |
352 | struct snd_pcm *pcm; |
353 | struct snd_pcm_str *pstr; |
354 | void *private_data; /* copied from pcm->private_data */ |
355 | int number; |
356 | char name[32]; /* substream name */ |
357 | int stream; /* stream (direction) */ |
358 | char latency_id[20]; /* latency identifier */ |
359 | size_t buffer_bytes_max; /* limit ring buffer size */ |
360 | struct snd_dma_buffer dma_buffer; |
361 | unsigned int dma_buf_id; |
362 | size_t dma_max; |
363 | /* -- hardware operations -- */ |
364 | struct snd_pcm_ops *ops; |
365 | /* -- runtime information -- */ |
366 | struct snd_pcm_runtime *runtime; |
367 | /* -- timer section -- */ |
368 | struct snd_timer *timer; /* timer */ |
369 | unsigned timer_running: 1; /* time is running */ |
370 | /* -- next substream -- */ |
371 | struct snd_pcm_substream *next; |
372 | /* -- linked substreams -- */ |
373 | struct list_head link_list; /* linked list member */ |
374 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
375 | struct snd_pcm_group *group; /* pointer to current group */ |
376 | /* -- assigned files -- */ |
377 | void *file; |
378 | int ref_count; |
379 | atomic_t mmap_count; |
380 | unsigned int f_flags; |
381 | void (*pcm_release)(struct snd_pcm_substream *); |
382 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
383 | /* -- OSS things -- */ |
384 | struct snd_pcm_oss_substream oss; |
385 | #endif |
386 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
387 | struct snd_info_entry *proc_root; |
388 | struct snd_info_entry *proc_info_entry; |
389 | struct snd_info_entry *proc_hw_params_entry; |
390 | struct snd_info_entry *proc_sw_params_entry; |
391 | struct snd_info_entry *proc_status_entry; |
392 | struct snd_info_entry *proc_prealloc_entry; |
393 | struct snd_info_entry *proc_prealloc_max_entry; |
394 | #endif |
395 | /* misc flags */ |
396 | unsigned int hw_opened: 1; |
397 | }; |
398 | |
399 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
400 | |
401 | |
402 | struct snd_pcm_str { |
403 | int stream; /* stream (direction) */ |
404 | struct snd_pcm *pcm; |
405 | /* -- substreams -- */ |
406 | unsigned int substream_count; |
407 | unsigned int substream_opened; |
408 | struct snd_pcm_substream *substream; |
409 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
410 | /* -- OSS things -- */ |
411 | struct snd_pcm_oss_stream oss; |
412 | #endif |
413 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
414 | struct snd_info_entry *proc_root; |
415 | struct snd_info_entry *proc_info_entry; |
416 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
417 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
418 | struct snd_info_entry *proc_xrun_debug_entry; |
419 | #endif |
420 | #endif |
421 | }; |
422 | |
423 | struct snd_pcm { |
424 | struct snd_card *card; |
425 | struct list_head list; |
426 | int device; /* device number */ |
427 | unsigned int info_flags; |
428 | unsigned short dev_class; |
429 | unsigned short dev_subclass; |
430 | char id[64]; |
431 | char name[80]; |
432 | struct snd_pcm_str streams[2]; |
433 | struct mutex open_mutex; |
434 | wait_queue_head_t open_wait; |
435 | void *private_data; |
436 | void (*private_free) (struct snd_pcm *pcm); |
437 | struct device *dev; /* actual hw device this belongs to */ |
438 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
439 | struct snd_pcm_oss oss; |
440 | #endif |
441 | }; |
442 | |
443 | struct snd_pcm_notify { |
444 | int (*n_register) (struct snd_pcm * pcm); |
445 | int (*n_disconnect) (struct snd_pcm * pcm); |
446 | int (*n_unregister) (struct snd_pcm * pcm); |
447 | struct list_head list; |
448 | }; |
449 | |
450 | /* |
451 | * Registering |
452 | */ |
453 | |
454 | extern const struct file_operations snd_pcm_f_ops[2]; |
455 | |
456 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
457 | int playback_count, int capture_count, |
458 | struct snd_pcm **rpcm); |
459 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); |
460 | |
461 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
462 | |
463 | /* |
464 | * Native I/O |
465 | */ |
466 | |
467 | extern rwlock_t snd_pcm_link_rwlock; |
468 | |
469 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
470 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
471 | struct snd_pcm_info __user *info); |
472 | int snd_pcm_status(struct snd_pcm_substream *substream, |
473 | struct snd_pcm_status *status); |
474 | int snd_pcm_start(struct snd_pcm_substream *substream); |
475 | int snd_pcm_stop(struct snd_pcm_substream *substream, int status); |
476 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); |
477 | #ifdef CONFIG_PM |
478 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
479 | int snd_pcm_suspend_all(struct snd_pcm *pcm); |
480 | #endif |
481 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
482 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
483 | struct snd_pcm_substream **rsubstream); |
484 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
485 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
486 | struct snd_pcm_substream **rsubstream); |
487 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); |
488 | void snd_pcm_vma_notify_data(void *client, void *data); |
489 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
490 | |
491 | /* |
492 | * PCM library |
493 | */ |
494 | |
495 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
496 | { |
497 | return substream->group != &substream->self_group; |
498 | } |
499 | |
500 | static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) |
501 | { |
502 | read_lock(&snd_pcm_link_rwlock); |
503 | spin_lock(&substream->self_group.lock); |
504 | } |
505 | |
506 | static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) |
507 | { |
508 | spin_unlock(&substream->self_group.lock); |
509 | read_unlock(&snd_pcm_link_rwlock); |
510 | } |
511 | |
512 | static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) |
513 | { |
514 | read_lock_irq(&snd_pcm_link_rwlock); |
515 | spin_lock(&substream->self_group.lock); |
516 | } |
517 | |
518 | static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) |
519 | { |
520 | spin_unlock(&substream->self_group.lock); |
521 | read_unlock_irq(&snd_pcm_link_rwlock); |
522 | } |
523 | |
524 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ |
525 | do { \ |
526 | read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ |
527 | spin_lock(&substream->self_group.lock); \ |
528 | } while (0) |
529 | |
530 | #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ |
531 | do { \ |
532 | spin_unlock(&substream->self_group.lock); \ |
533 | read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ |
534 | } while (0) |
535 | |
536 | #define snd_pcm_group_for_each_entry(s, substream) \ |
537 | list_for_each_entry(s, &substream->group->substreams, link_list) |
538 | |
539 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
540 | { |
541 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || |
542 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && |
543 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); |
544 | } |
545 | |
546 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
547 | { |
548 | return size * 8 / runtime->sample_bits; |
549 | } |
550 | |
551 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
552 | { |
553 | return size * 8 / runtime->frame_bits; |
554 | } |
555 | |
556 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
557 | { |
558 | return size * runtime->sample_bits / 8; |
559 | } |
560 | |
561 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
562 | { |
563 | return size * runtime->frame_bits / 8; |
564 | } |
565 | |
566 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
567 | { |
568 | return bytes % runtime->byte_align == 0; |
569 | } |
570 | |
571 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
572 | { |
573 | struct snd_pcm_runtime *runtime = substream->runtime; |
574 | return frames_to_bytes(runtime, runtime->buffer_size); |
575 | } |
576 | |
577 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
578 | { |
579 | struct snd_pcm_runtime *runtime = substream->runtime; |
580 | return frames_to_bytes(runtime, runtime->period_size); |
581 | } |
582 | |
583 | /* |
584 | * result is: 0 ... (boundary - 1) |
585 | */ |
586 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
587 | { |
588 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; |
589 | if (avail < 0) |
590 | avail += runtime->boundary; |
591 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) |
592 | avail -= runtime->boundary; |
593 | return avail; |
594 | } |
595 | |
596 | /* |
597 | * result is: 0 ... (boundary - 1) |
598 | */ |
599 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
600 | { |
601 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; |
602 | if (avail < 0) |
603 | avail += runtime->boundary; |
604 | return avail; |
605 | } |
606 | |
607 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
608 | { |
609 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); |
610 | } |
611 | |
612 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
613 | { |
614 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); |
615 | } |
616 | |
617 | /** |
618 | * snd_pcm_playback_ready - check whether the playback buffer is available |
619 | * @substream: the pcm substream instance |
620 | * |
621 | * Checks whether enough free space is available on the playback buffer. |
622 | * |
623 | * Returns non-zero if available, or zero if not. |
624 | */ |
625 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
626 | { |
627 | struct snd_pcm_runtime *runtime = substream->runtime; |
628 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
629 | } |
630 | |
631 | /** |
632 | * snd_pcm_capture_ready - check whether the capture buffer is available |
633 | * @substream: the pcm substream instance |
634 | * |
635 | * Checks whether enough capture data is available on the capture buffer. |
636 | * |
637 | * Returns non-zero if available, or zero if not. |
638 | */ |
639 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
640 | { |
641 | struct snd_pcm_runtime *runtime = substream->runtime; |
642 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
643 | } |
644 | |
645 | /** |
646 | * snd_pcm_playback_data - check whether any data exists on the playback buffer |
647 | * @substream: the pcm substream instance |
648 | * |
649 | * Checks whether any data exists on the playback buffer. If stop_threshold |
650 | * is bigger or equal to boundary, then this function returns always non-zero. |
651 | * |
652 | * Returns non-zero if exists, or zero if not. |
653 | */ |
654 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
655 | { |
656 | struct snd_pcm_runtime *runtime = substream->runtime; |
657 | |
658 | if (runtime->stop_threshold >= runtime->boundary) |
659 | return 1; |
660 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; |
661 | } |
662 | |
663 | /** |
664 | * snd_pcm_playback_empty - check whether the playback buffer is empty |
665 | * @substream: the pcm substream instance |
666 | * |
667 | * Checks whether the playback buffer is empty. |
668 | * |
669 | * Returns non-zero if empty, or zero if not. |
670 | */ |
671 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
672 | { |
673 | struct snd_pcm_runtime *runtime = substream->runtime; |
674 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
675 | } |
676 | |
677 | /** |
678 | * snd_pcm_capture_empty - check whether the capture buffer is empty |
679 | * @substream: the pcm substream instance |
680 | * |
681 | * Checks whether the capture buffer is empty. |
682 | * |
683 | * Returns non-zero if empty, or zero if not. |
684 | */ |
685 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
686 | { |
687 | struct snd_pcm_runtime *runtime = substream->runtime; |
688 | return snd_pcm_capture_avail(runtime) == 0; |
689 | } |
690 | |
691 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
692 | struct snd_pcm_substream *master) |
693 | { |
694 | substream->runtime->trigger_master = master; |
695 | } |
696 | |
697 | static inline int hw_is_mask(int var) |
698 | { |
699 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && |
700 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; |
701 | } |
702 | |
703 | static inline int hw_is_interval(int var) |
704 | { |
705 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && |
706 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; |
707 | } |
708 | |
709 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
710 | snd_pcm_hw_param_t var) |
711 | { |
712 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
713 | } |
714 | |
715 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
716 | snd_pcm_hw_param_t var) |
717 | { |
718 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
719 | } |
720 | |
721 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
722 | snd_pcm_hw_param_t var) |
723 | { |
724 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
725 | } |
726 | |
727 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
728 | snd_pcm_hw_param_t var) |
729 | { |
730 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
731 | } |
732 | |
733 | #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) |
734 | #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) |
735 | #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) |
736 | #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min |
737 | #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min |
738 | #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min |
739 | #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) |
740 | #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min |
741 | #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min |
742 | #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min |
743 | |
744 | |
745 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
746 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); |
747 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); |
748 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
749 | unsigned int k, struct snd_interval *c); |
750 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
751 | const struct snd_interval *b, struct snd_interval *c); |
752 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); |
753 | int snd_interval_ratnum(struct snd_interval *i, |
754 | unsigned int rats_count, struct snd_ratnum *rats, |
755 | unsigned int *nump, unsigned int *denp); |
756 | |
757 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
758 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); |
759 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
760 | |
761 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
762 | |
763 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
764 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); |
765 | |
766 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
767 | u_int32_t mask); |
768 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
769 | u_int64_t mask); |
770 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
771 | unsigned int min, unsigned int max); |
772 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
773 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
774 | unsigned int cond, |
775 | snd_pcm_hw_param_t var, |
776 | struct snd_pcm_hw_constraint_list *l); |
777 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
778 | unsigned int cond, |
779 | snd_pcm_hw_param_t var, |
780 | struct snd_pcm_hw_constraint_ratnums *r); |
781 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
782 | unsigned int cond, |
783 | snd_pcm_hw_param_t var, |
784 | struct snd_pcm_hw_constraint_ratdens *r); |
785 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
786 | unsigned int cond, |
787 | unsigned int width, |
788 | unsigned int msbits); |
789 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
790 | unsigned int cond, |
791 | snd_pcm_hw_param_t var, |
792 | unsigned long step); |
793 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
794 | unsigned int cond, |
795 | snd_pcm_hw_param_t var); |
796 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
797 | unsigned int cond, |
798 | int var, |
799 | snd_pcm_hw_rule_func_t func, void *private, |
800 | int dep, ...); |
801 | |
802 | int snd_pcm_format_signed(snd_pcm_format_t format); |
803 | int snd_pcm_format_unsigned(snd_pcm_format_t format); |
804 | int snd_pcm_format_linear(snd_pcm_format_t format); |
805 | int snd_pcm_format_little_endian(snd_pcm_format_t format); |
806 | int snd_pcm_format_big_endian(snd_pcm_format_t format); |
807 | #if 0 /* just for DocBook */ |
808 | /** |
809 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
810 | * @format: the format to check |
811 | * |
812 | * Returns 1 if the given PCM format is CPU-endian, 0 if |
813 | * opposite, or a negative error code if endian not specified. |
814 | */ |
815 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
816 | #endif /* DocBook */ |
817 | #ifdef SNDRV_LITTLE_ENDIAN |
818 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
819 | #else |
820 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
821 | #endif |
822 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
823 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ |
824 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
825 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
826 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); |
827 | snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); |
828 | |
829 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); |
830 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); |
831 | int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); |
832 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
833 | unsigned int cmd, void *arg); |
834 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
835 | int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); |
836 | int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); |
837 | int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); |
838 | int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); |
839 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); |
840 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
841 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, |
842 | const void __user *buf, |
843 | snd_pcm_uframes_t frames); |
844 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
845 | void __user *buf, snd_pcm_uframes_t frames); |
846 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
847 | void __user **bufs, snd_pcm_uframes_t frames); |
848 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
849 | void __user **bufs, snd_pcm_uframes_t frames); |
850 | |
851 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
852 | |
853 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
854 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
855 | |
856 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
857 | struct snd_dma_buffer *bufp) |
858 | { |
859 | struct snd_pcm_runtime *runtime = substream->runtime; |
860 | if (bufp) { |
861 | runtime->dma_buffer_p = bufp; |
862 | runtime->dma_area = bufp->area; |
863 | runtime->dma_addr = bufp->addr; |
864 | runtime->dma_bytes = bufp->bytes; |
865 | } else { |
866 | runtime->dma_buffer_p = NULL; |
867 | runtime->dma_area = NULL; |
868 | runtime->dma_addr = 0; |
869 | runtime->dma_bytes = 0; |
870 | } |
871 | } |
872 | |
873 | /* |
874 | * Timer interface |
875 | */ |
876 | |
877 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
878 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); |
879 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); |
880 | |
881 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
882 | struct timespec *tv) |
883 | { |
884 | if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) |
885 | do_posix_clock_monotonic_gettime(tv); |
886 | else |
887 | getnstimeofday(tv); |
888 | } |
889 | |
890 | /* |
891 | * Memory |
892 | */ |
893 | |
894 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
895 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); |
896 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, |
897 | int type, struct device *data, |
898 | size_t size, size_t max); |
899 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
900 | int type, void *data, |
901 | size_t size, size_t max); |
902 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
903 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); |
904 | |
905 | /* |
906 | * SG-buffer handling |
907 | */ |
908 | #define snd_pcm_substream_sgbuf(substream) \ |
909 | ((substream)->runtime->dma_buffer_p->private_data) |
910 | |
911 | static inline dma_addr_t |
912 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) |
913 | { |
914 | struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); |
915 | return snd_sgbuf_get_addr(sg, ofs); |
916 | } |
917 | |
918 | static inline void * |
919 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) |
920 | { |
921 | struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); |
922 | return snd_sgbuf_get_ptr(sg, ofs); |
923 | } |
924 | |
925 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, |
926 | unsigned long offset); |
927 | unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, |
928 | unsigned int ofs, unsigned int size); |
929 | |
930 | /* handle mmap counter - PCM mmap callback should handle this counter properly */ |
931 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) |
932 | { |
933 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
934 | atomic_inc(&substream->mmap_count); |
935 | } |
936 | |
937 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) |
938 | { |
939 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
940 | atomic_dec(&substream->mmap_count); |
941 | } |
942 | |
943 | /* mmap for io-memory area */ |
944 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) |
945 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP |
946 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
947 | #else |
948 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 |
949 | #define snd_pcm_lib_mmap_iomem NULL |
950 | #endif |
951 | |
952 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) |
953 | { |
954 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; |
955 | } |
956 | |
957 | /* |
958 | * Misc |
959 | */ |
960 | |
961 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ |
962 | (IEC958_AES1_CON_ORIGINAL<<8)|\ |
963 | (IEC958_AES1_CON_PCM_CODER<<8)|\ |
964 | (IEC958_AES3_CON_FS_48000<<24)) |
965 | |
966 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) |
967 | |
968 | #endif /* __SOUND_PCM_H */ |
969 |
Branches:
ben-wpan
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javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9