Iliyan Malchev | 4765c43 | 2012-06-11 14:36:16 -0700 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright 2010, The Android Open-Source Project |
Duy Truong | fae1962 | 2013-11-24 02:17:54 -0800 | [diff] [blame] | 3 | ** Copyright (c) 2011-2012, The Linux Foundation. All rights reserved. |
Iliyan Malchev | 4765c43 | 2012-06-11 14:36:16 -0700 | [diff] [blame] | 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
Ajay Dudani | 9746c47 | 2012-06-18 16:01:16 -0700 | [diff] [blame] | 18 | #define LOG_TAG "alsa_pcm" |
| 19 | #define LOG_NDEBUG 1 |
Iliyan Malchev | 4765c43 | 2012-06-11 14:36:16 -0700 | [diff] [blame] | 20 | #ifdef ANDROID |
| 21 | /* definitions for Android logging */ |
| 22 | #include <utils/Log.h> |
| 23 | #include <cutils/properties.h> |
| 24 | #else /* ANDROID */ |
| 25 | #define strlcat g_strlcat |
| 26 | #define strlcpy g_strlcpy |
| 27 | #define ALOGI(...) fprintf(stdout, __VA_ARGS__) |
| 28 | #define ALOGE(...) fprintf(stderr, __VA_ARGS__) |
| 29 | #define ALOGV(...) fprintf(stderr, __VA_ARGS__) |
| 30 | #endif /* ANDROID */ |
| 31 | |
| 32 | #include <stdio.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <fcntl.h> |
| 35 | #include <stdarg.h> |
| 36 | #include <string.h> |
| 37 | #include <errno.h> |
| 38 | #include <unistd.h> |
| 39 | #include <stdint.h> |
| 40 | #include <sys/ioctl.h> |
| 41 | #include <sys/mman.h> |
| 42 | #include <sys/time.h> |
| 43 | #include <sys/poll.h> |
| 44 | #include <linux/ioctl.h> |
| 45 | #include <linux/types.h> |
| 46 | |
| 47 | #include "alsa_audio.h" |
| 48 | |
| 49 | #define __force |
| 50 | #define __bitwise |
| 51 | #define __user |
| 52 | |
| 53 | #define DEBUG 1 |
| 54 | |
| 55 | enum format_alias { |
| 56 | S8 = 0, |
| 57 | U8, |
| 58 | S16_LE, |
| 59 | S16_BE, |
| 60 | U16_LE, |
| 61 | U16_BE, |
| 62 | S24_LE, |
| 63 | S24_BE, |
| 64 | U24_LE, |
| 65 | U24_BE, |
| 66 | S32_LE, |
| 67 | S32_BE, |
| 68 | U32_LE, |
| 69 | U32_BE, |
| 70 | FLOAT_LE, |
| 71 | FLOAT_BE, |
| 72 | FLOAT64_LE, |
| 73 | FLOAT64_BE, |
| 74 | IEC958_SUBFRAME_LE, |
| 75 | IEC958_SUBFRAME_BE, |
| 76 | MU_LAW, |
| 77 | A_LAW, |
| 78 | IMA_ADPCM, |
| 79 | MPEG, |
| 80 | GSM, |
| 81 | SPECIAL = 31, |
| 82 | S24_3LE, |
| 83 | S24_3BE, |
| 84 | U24_3LE, |
| 85 | U24_3BE, |
| 86 | S20_3LE, |
| 87 | S20_3BE, |
| 88 | U20_3LE, |
| 89 | U20_3BE, |
| 90 | S18_3LE, |
| 91 | S18_3BE, |
| 92 | U18_3LE, |
| 93 | U18_3BE, |
| 94 | FORMAT_LAST, |
| 95 | }; |
| 96 | const char *formats_list[][2] = { |
| 97 | {"S8", "Signed 8 bit"}, |
| 98 | {"U8", "Unsigned 8 bit"}, |
| 99 | {"S16_LE", "Signed 16 bit Little Endian"}, |
| 100 | {"S16_BE", "Signed 16 bit Big Endian"}, |
| 101 | {"U16_LE", "Unsigned 16 bit Little Endian"}, |
| 102 | {"U16_BE", "Unsigned 16 bit Big Endian"}, |
| 103 | {"S24_LE", "Signed 24 bit Little Endian"}, |
| 104 | {"S24_BE", "Signed 24 bit Big Endian"}, |
| 105 | {"U24_LE", "Unsigned 24 bit Little Endian"}, |
| 106 | {"U24_BE", "Unsigned 24 bit Big Endian"}, |
| 107 | {"S32_LE", "Signed 32 bit Little Endian"}, |
| 108 | {"S32_BE", "Signed 32 bit Big Endian"}, |
| 109 | {"U32_LE", "Unsigned 32 bit Little Endian"}, |
| 110 | {"U32_BE", "Unsigned 32 bit Big Endian"}, |
| 111 | {"FLOAT_LE", "Float 32 bit Little Endian"}, |
| 112 | {"FLOAT_BE", "Float 32 bit Big Endian"}, |
| 113 | {"FLOAT64_LE", "Float 64 bit Little Endian"}, |
| 114 | {"FLOAT64_BE", "Float 64 bit Big Endian"}, |
| 115 | {"IEC958_SUBFRAME_LE", "IEC-958 Little Endian"}, |
| 116 | {"IEC958_SUBFRAME_BE", "IEC-958 Big Endian"}, |
| 117 | {"MU_LAW", "Mu-Law"}, |
| 118 | {"A_LAW", "A-Law"}, |
| 119 | {"IMA_ADPCM", "Ima-ADPCM"}, |
| 120 | {"MPEG", "MPEG"}, |
| 121 | {"GSM", "GSM"}, |
| 122 | [31] = {"SPECIAL", "Special"}, |
| 123 | {"S24_3LE", "Signed 24 bit Little Endian in 3bytes"}, |
| 124 | {"S24_3BE", "Signed 24 bit Big Endian in 3bytes"}, |
| 125 | {"U24_3LE", "Unsigned 24 bit Little Endian in 3bytes"}, |
| 126 | {"U24_3BE", "Unsigned 24 bit Big Endian in 3bytes"}, |
| 127 | {"S20_3LE", "Signed 20 bit Little Endian in 3bytes"}, |
| 128 | {"S20_3BE", "Signed 20 bit Big Endian in 3bytes"}, |
| 129 | {"U20_3LE", "Unsigned 20 bit Little Endian in 3bytes"}, |
| 130 | {"U20_3BE", "Unsigned 20 bit Big Endian in 3bytes"}, |
| 131 | {"S18_3LE", "Signed 18 bit Little Endian in 3bytes"}, |
| 132 | {"S18_3BE", "Signed 18 bit Big Endian in 3bytes"}, |
| 133 | {"U18_3LE", "Unsigned 18 bit Little Endian in 3bytes"}, |
| 134 | {"U18_3BE", "Unsigned 18 bit Big Endian in 3bytes"}, |
| 135 | }; |
| 136 | |
| 137 | int get_compressed_format(const char *format) |
| 138 | { |
| 139 | const char *ch = format; |
| 140 | if (strcmp(ch, "MP3") == 0) { |
| 141 | printf("MP3 is selected\n"); |
| 142 | return FORMAT_MP3; |
| 143 | } else if (strcmp(ch, "AC3_PASS_THROUGH") == 0) { |
| 144 | printf("AC3 PASS THROUGH is selected\n"); |
| 145 | return FORMAT_AC3_PASS_THROUGH; |
| 146 | } else { |
| 147 | printf("invalid format\n"); |
| 148 | return -1; |
| 149 | } |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | int get_format(const char* name) |
| 154 | { |
| 155 | int format; |
| 156 | for (format = 0; format < FORMAT_LAST; format++) { |
| 157 | if (formats_list[format][0] && |
| 158 | strcasecmp(name, formats_list[format][0]) == 0) { |
| 159 | ALOGV("format_names %s", name); |
| 160 | return format; |
| 161 | } |
| 162 | } |
| 163 | return -EINVAL; |
| 164 | } |
| 165 | |
| 166 | const char *get_format_name(int format) |
| 167 | { |
| 168 | if ((format < FORMAT_LAST) && |
| 169 | formats_list[format][0]) |
| 170 | return formats_list[format][0]; |
| 171 | return NULL; |
| 172 | } |
| 173 | |
| 174 | const char *get_format_desc(int format) |
| 175 | { |
| 176 | if ((format < FORMAT_LAST) && |
| 177 | formats_list[format][1]) |
| 178 | return formats_list[format][1]; |
| 179 | return NULL; |
| 180 | } |
| 181 | |
| 182 | /* alsa parameter manipulation cruft */ |
| 183 | |
| 184 | #define PARAM_MAX SNDRV_PCM_HW_PARAM_LAST_INTERVAL |
| 185 | static int oops(struct pcm *pcm, int e, const char *fmt, ...); |
| 186 | |
| 187 | static inline int param_is_mask(int p) |
| 188 | { |
| 189 | return (p >= SNDRV_PCM_HW_PARAM_FIRST_MASK) && |
| 190 | (p <= SNDRV_PCM_HW_PARAM_LAST_MASK); |
| 191 | } |
| 192 | |
| 193 | static inline int param_is_interval(int p) |
| 194 | { |
| 195 | return (p >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL) && |
| 196 | (p <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL); |
| 197 | } |
| 198 | |
| 199 | static inline struct snd_interval *param_to_interval(struct snd_pcm_hw_params *p, int n) |
| 200 | { |
| 201 | return &(p->intervals[n - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]); |
| 202 | } |
| 203 | |
| 204 | static inline struct snd_mask *param_to_mask(struct snd_pcm_hw_params *p, int n) |
| 205 | { |
| 206 | return &(p->masks[n - SNDRV_PCM_HW_PARAM_FIRST_MASK]); |
| 207 | } |
| 208 | |
| 209 | void param_set_mask(struct snd_pcm_hw_params *p, int n, unsigned bit) |
| 210 | { |
| 211 | if (bit >= SNDRV_MASK_MAX) |
| 212 | return; |
| 213 | if (param_is_mask(n)) { |
| 214 | struct snd_mask *m = param_to_mask(p, n); |
| 215 | m->bits[0] = 0; |
| 216 | m->bits[1] = 0; |
| 217 | m->bits[bit >> 5] |= (1 << (bit & 31)); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | void param_set_min(struct snd_pcm_hw_params *p, int n, unsigned val) |
| 222 | { |
| 223 | if (param_is_interval(n)) { |
| 224 | struct snd_interval *i = param_to_interval(p, n); |
| 225 | i->min = val; |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | void param_set_max(struct snd_pcm_hw_params *p, int n, unsigned val) |
| 230 | { |
| 231 | if (param_is_interval(n)) { |
| 232 | struct snd_interval *i = param_to_interval(p, n); |
| 233 | i->max = val; |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | void param_set_int(struct snd_pcm_hw_params *p, int n, unsigned val) |
| 238 | { |
| 239 | if (param_is_interval(n)) { |
| 240 | struct snd_interval *i = param_to_interval(p, n); |
| 241 | i->min = val; |
| 242 | i->max = val; |
| 243 | i->integer = 1; |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | void param_init(struct snd_pcm_hw_params *p) |
| 248 | { |
| 249 | int n; |
| 250 | memset(p, 0, sizeof(*p)); |
| 251 | for (n = SNDRV_PCM_HW_PARAM_FIRST_MASK; |
| 252 | n <= SNDRV_PCM_HW_PARAM_LAST_MASK; n++) { |
| 253 | struct snd_mask *m = param_to_mask(p, n); |
| 254 | m->bits[0] = ~0; |
| 255 | m->bits[1] = ~0; |
| 256 | } |
| 257 | for (n = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; |
| 258 | n <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; n++) { |
| 259 | struct snd_interval *i = param_to_interval(p, n); |
| 260 | i->min = 0; |
| 261 | i->max = ~0; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | /* debugging gunk */ |
| 266 | |
| 267 | #if DEBUG |
| 268 | static const char *param_name[PARAM_MAX+1] = { |
| 269 | [SNDRV_PCM_HW_PARAM_ACCESS] = "access", |
| 270 | [SNDRV_PCM_HW_PARAM_FORMAT] = "format", |
| 271 | [SNDRV_PCM_HW_PARAM_SUBFORMAT] = "subformat", |
| 272 | |
| 273 | [SNDRV_PCM_HW_PARAM_SAMPLE_BITS] = "sample_bits", |
| 274 | [SNDRV_PCM_HW_PARAM_FRAME_BITS] = "frame_bits", |
| 275 | [SNDRV_PCM_HW_PARAM_CHANNELS] = "channels", |
| 276 | [SNDRV_PCM_HW_PARAM_RATE] = "rate", |
| 277 | [SNDRV_PCM_HW_PARAM_PERIOD_TIME] = "period_time", |
| 278 | [SNDRV_PCM_HW_PARAM_PERIOD_SIZE] = "period_size", |
| 279 | [SNDRV_PCM_HW_PARAM_PERIOD_BYTES] = "period_bytes", |
| 280 | [SNDRV_PCM_HW_PARAM_PERIODS] = "periods", |
| 281 | [SNDRV_PCM_HW_PARAM_BUFFER_TIME] = "buffer_time", |
| 282 | [SNDRV_PCM_HW_PARAM_BUFFER_SIZE] = "buffer_size", |
| 283 | [SNDRV_PCM_HW_PARAM_BUFFER_BYTES] = "buffer_bytes", |
| 284 | [SNDRV_PCM_HW_PARAM_TICK_TIME] = "tick_time", |
| 285 | }; |
| 286 | |
| 287 | void param_dump(struct snd_pcm_hw_params *p) |
| 288 | { |
| 289 | int n; |
| 290 | |
| 291 | for (n = SNDRV_PCM_HW_PARAM_FIRST_MASK; |
| 292 | n <= SNDRV_PCM_HW_PARAM_LAST_MASK; n++) { |
| 293 | struct snd_mask *m = param_to_mask(p, n); |
| 294 | ALOGV("%s = %08x%08x\n", param_name[n], |
| 295 | m->bits[1], m->bits[0]); |
| 296 | } |
| 297 | for (n = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; |
| 298 | n <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; n++) { |
| 299 | struct snd_interval *i = param_to_interval(p, n); |
| 300 | ALOGV("%s = (%d,%d) omin=%d omax=%d int=%d empty=%d\n", |
| 301 | param_name[n], i->min, i->max, i->openmin, |
| 302 | i->openmax, i->integer, i->empty); |
| 303 | } |
| 304 | ALOGV("info = %08x\n", p->info); |
| 305 | ALOGV("msbits = %d\n", p->msbits); |
| 306 | ALOGV("rate = %d/%d\n", p->rate_num, p->rate_den); |
| 307 | ALOGV("fifo = %d\n", (int) p->fifo_size); |
| 308 | } |
| 309 | |
| 310 | static void info_dump(struct snd_pcm_info *info) |
| 311 | { |
| 312 | ALOGV("device = %d\n", info->device); |
| 313 | ALOGV("subdevice = %d\n", info->subdevice); |
| 314 | ALOGV("stream = %d\n", info->stream); |
| 315 | ALOGV("card = %d\n", info->card); |
| 316 | ALOGV("id = '%s'\n", info->id); |
| 317 | ALOGV("name = '%s'\n", info->name); |
| 318 | ALOGV("subname = '%s'\n", info->subname); |
| 319 | ALOGV("dev_class = %d\n", info->dev_class); |
| 320 | ALOGV("dev_subclass = %d\n", info->dev_subclass); |
| 321 | ALOGV("subdevices_count = %d\n", info->subdevices_count); |
| 322 | ALOGV("subdevices_avail = %d\n", info->subdevices_avail); |
| 323 | } |
| 324 | #else |
| 325 | void param_dump(struct snd_pcm_hw_params *p) {} |
| 326 | static void info_dump(struct snd_pcm_info *info) {} |
| 327 | #endif |
| 328 | |
| 329 | int param_set_hw_refine(struct pcm *pcm, struct snd_pcm_hw_params *params) |
| 330 | { |
| 331 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_HW_REFINE, params)) { |
| 332 | ALOGE("SNDRV_PCM_IOCTL_HW_REFINE failed"); |
| 333 | return -EPERM; |
| 334 | } |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | int param_set_hw_params(struct pcm *pcm, struct snd_pcm_hw_params *params) |
| 339 | { |
| 340 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_HW_PARAMS, params)) { |
| 341 | return -EPERM; |
| 342 | } |
| 343 | pcm->hw_p = params; |
| 344 | return 0; |
| 345 | } |
| 346 | |
| 347 | int param_set_sw_params(struct pcm *pcm, struct snd_pcm_sw_params *sparams) |
| 348 | { |
| 349 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_SW_PARAMS, sparams)) { |
| 350 | return -EPERM; |
| 351 | } |
| 352 | pcm->sw_p = sparams; |
| 353 | return 0; |
| 354 | } |
| 355 | |
| 356 | int pcm_buffer_size(struct snd_pcm_hw_params *params) |
| 357 | { |
| 358 | struct snd_interval *i = param_to_interval(params, SNDRV_PCM_HW_PARAM_BUFFER_BYTES); |
| 359 | ALOGV("%s = (%d,%d) omin=%d omax=%d int=%d empty=%d\n", |
| 360 | param_name[SNDRV_PCM_HW_PARAM_BUFFER_BYTES], |
| 361 | i->min, i->max, i->openmin, |
| 362 | i->openmax, i->integer, i->empty); |
| 363 | return i->min; |
| 364 | } |
| 365 | |
| 366 | int pcm_period_size(struct snd_pcm_hw_params *params) |
| 367 | { |
| 368 | struct snd_interval *i = param_to_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_BYTES); |
| 369 | ALOGV("%s = (%d,%d) omin=%d omax=%d int=%d empty=%d\n", |
| 370 | param_name[SNDRV_PCM_HW_PARAM_PERIOD_BYTES], |
| 371 | i->min, i->max, i->openmin, |
| 372 | i->openmax, i->integer, i->empty); |
| 373 | return i->min; |
| 374 | } |
| 375 | |
| 376 | const char* pcm_error(struct pcm *pcm) |
| 377 | { |
| 378 | return pcm->error; |
| 379 | } |
| 380 | |
| 381 | static int oops(struct pcm *pcm, int e, const char *fmt, ...) |
| 382 | { |
| 383 | va_list ap; |
| 384 | int sz; |
| 385 | |
| 386 | va_start(ap, fmt); |
| 387 | vsnprintf(pcm->error, PCM_ERROR_MAX, fmt, ap); |
| 388 | va_end(ap); |
| 389 | sz = strnlen(pcm->error, PCM_ERROR_MAX); |
| 390 | |
| 391 | if (errno) |
| 392 | snprintf(pcm->error + sz, PCM_ERROR_MAX - sz, |
| 393 | ": %s", strerror(e)); |
| 394 | return -1; |
| 395 | } |
| 396 | |
| 397 | long pcm_avail(struct pcm *pcm) |
| 398 | { |
| 399 | struct snd_pcm_sync_ptr *sync_ptr = pcm->sync_ptr; |
| 400 | if (pcm->flags & DEBUG_ON) { |
| 401 | ALOGV("hw_ptr = %d buf_size = %d appl_ptr = %d\n", |
| 402 | sync_ptr->s.status.hw_ptr, |
| 403 | pcm->buffer_size, |
| 404 | sync_ptr->c.control.appl_ptr); |
| 405 | } |
| 406 | if (pcm->flags & PCM_IN) { |
| 407 | long avail = sync_ptr->s.status.hw_ptr - sync_ptr->c.control.appl_ptr; |
| 408 | if (avail < 0) |
| 409 | avail += pcm->sw_p->boundary; |
| 410 | return avail; |
| 411 | } else { |
| 412 | long avail = sync_ptr->s.status.hw_ptr - sync_ptr->c.control.appl_ptr + ((pcm->flags & PCM_MONO) ? pcm->buffer_size/2 : pcm->buffer_size/4); |
| 413 | if (avail < 0) |
| 414 | avail += pcm->sw_p->boundary; |
| 415 | else if ((unsigned long) avail >= pcm->sw_p->boundary) |
| 416 | avail -= pcm->sw_p->boundary; |
| 417 | return avail; |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | int sync_ptr(struct pcm *pcm) |
| 422 | { |
| 423 | int err; |
| 424 | err = ioctl(pcm->fd, SNDRV_PCM_IOCTL_SYNC_PTR, pcm->sync_ptr); |
| 425 | if (err < 0) { |
| 426 | err = errno; |
| 427 | ALOGE("SNDRV_PCM_IOCTL_SYNC_PTR failed %d \n", err); |
| 428 | return err; |
| 429 | } |
| 430 | |
| 431 | return 0; |
| 432 | } |
| 433 | |
| 434 | int mmap_buffer(struct pcm *pcm) |
| 435 | { |
| 436 | int err, i; |
| 437 | char *ptr; |
| 438 | unsigned size; |
| 439 | struct snd_pcm_channel_info ch; |
| 440 | int channels = (pcm->flags & PCM_MONO) ? 1 : 2; |
| 441 | |
| 442 | size = pcm->buffer_size; |
| 443 | if (pcm->flags & DEBUG_ON) |
| 444 | ALOGV("size = %d\n", size); |
| 445 | pcm->addr = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, |
| 446 | pcm->fd, 0); |
| 447 | if (pcm->addr) |
| 448 | return 0; |
| 449 | else |
| 450 | return -errno; |
| 451 | } |
| 452 | |
| 453 | /* |
| 454 | * Destination offset would be mod of total data written |
| 455 | * (application pointer) and the buffer size of the driver. |
| 456 | * Hence destination address would be base address(pcm->addr) + |
| 457 | * destination offset. |
| 458 | */ |
| 459 | u_int8_t *dst_address(struct pcm *pcm) |
| 460 | { |
| 461 | unsigned long pcm_offset = 0; |
| 462 | struct snd_pcm_sync_ptr *sync_ptr = pcm->sync_ptr; |
| 463 | unsigned int appl_ptr = 0; |
| 464 | |
| 465 | appl_ptr = (pcm->flags & PCM_MONO) ? sync_ptr->c.control.appl_ptr*2 : sync_ptr->c.control.appl_ptr*4; |
| 466 | pcm_offset = (appl_ptr % (unsigned long)pcm->buffer_size); |
| 467 | return pcm->addr + pcm_offset; |
| 468 | |
| 469 | } |
| 470 | |
| 471 | int mmap_transfer(struct pcm *pcm, void *data, unsigned offset, |
| 472 | long frames) |
| 473 | { |
| 474 | struct snd_pcm_sync_ptr *sync_ptr = pcm->sync_ptr; |
| 475 | unsigned size; |
| 476 | u_int8_t *dst_addr, *mmaped_addr; |
| 477 | u_int8_t *src_addr = data; |
| 478 | int channels = (pcm->flags & PCM_MONO) ? 1 : 2; |
| 479 | |
| 480 | dst_addr = dst_address(pcm); |
| 481 | |
| 482 | frames = frames * channels *2 ; |
| 483 | |
| 484 | while (frames-- > 0) { |
| 485 | *(u_int8_t*)dst_addr = *(const u_int8_t*)src_addr; |
| 486 | src_addr++; |
| 487 | dst_addr++; |
| 488 | } |
| 489 | return 0; |
| 490 | } |
| 491 | |
| 492 | int mmap_transfer_capture(struct pcm *pcm, void *data, unsigned offset, |
| 493 | long frames) |
| 494 | { |
| 495 | struct snd_pcm_sync_ptr *sync_ptr = pcm->sync_ptr; |
| 496 | unsigned long pcm_offset = 0; |
| 497 | unsigned size; |
| 498 | u_int8_t *dst_addr, *mmaped_addr; |
| 499 | u_int8_t *src_addr; |
| 500 | int channels = (pcm->flags & PCM_MONO) ? 1 : 2; |
| 501 | unsigned int tmp = (pcm->flags & PCM_MONO) ? sync_ptr->c.control.appl_ptr*2 : sync_ptr->c.control.appl_ptr*4; |
| 502 | |
| 503 | pcm_offset = (tmp % (unsigned long)pcm->buffer_size); |
| 504 | dst_addr = data; |
| 505 | src_addr = pcm->addr + pcm_offset; |
| 506 | frames = frames * channels *2 ; |
| 507 | |
| 508 | while (frames-- > 0) { |
| 509 | *(u_int8_t*)dst_addr = *(const u_int8_t*)src_addr; |
| 510 | src_addr++; |
| 511 | dst_addr++; |
| 512 | } |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | int pcm_prepare(struct pcm *pcm) |
| 517 | { |
| 518 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_PREPARE)) { |
| 519 | ALOGE("cannot prepare channel: errno =%d\n", -errno); |
| 520 | return -errno; |
| 521 | } |
| 522 | pcm->running = 1; |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | static int pcm_write_mmap(struct pcm *pcm, void *data, unsigned count) |
| 527 | { |
| 528 | long frames; |
| 529 | int err; |
| 530 | int bytes_written; |
| 531 | |
| 532 | frames = (pcm->flags & PCM_MONO) ? (count / 2) : (count / 4); |
| 533 | |
| 534 | pcm->sync_ptr->flags = SNDRV_PCM_SYNC_PTR_APPL | SNDRV_PCM_SYNC_PTR_AVAIL_MIN; |
| 535 | err = sync_ptr(pcm); |
| 536 | if (err == EPIPE) { |
| 537 | ALOGE("Failed in sync_ptr\n"); |
| 538 | /* we failed to make our window -- try to restart */ |
| 539 | pcm->underruns++; |
| 540 | pcm->running = 0; |
| 541 | pcm_prepare(pcm); |
| 542 | } |
| 543 | pcm->sync_ptr->c.control.appl_ptr += frames; |
| 544 | pcm->sync_ptr->flags = 0; |
| 545 | |
| 546 | err = sync_ptr(pcm); |
| 547 | if (err == EPIPE) { |
| 548 | ALOGE("Failed in sync_ptr 2 \n"); |
| 549 | /* we failed to make our window -- try to restart */ |
| 550 | pcm->underruns++; |
| 551 | pcm->running = 0; |
| 552 | pcm_prepare(pcm); |
| 553 | } |
| 554 | bytes_written = pcm->sync_ptr->c.control.appl_ptr - pcm->sync_ptr->s.status.hw_ptr; |
| 555 | if ((bytes_written >= pcm->sw_p->start_threshold) && (!pcm->start)) { |
| 556 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_START)) { |
| 557 | err = -errno; |
| 558 | if (errno == EPIPE) { |
| 559 | ALOGE("Failed in SNDRV_PCM_IOCTL_START\n"); |
| 560 | /* we failed to make our window -- try to restart */ |
| 561 | pcm->underruns++; |
| 562 | pcm->running = 0; |
| 563 | pcm_prepare(pcm); |
| 564 | } else { |
| 565 | ALOGE("Error no %d \n", errno); |
| 566 | return -errno; |
| 567 | } |
| 568 | } else { |
SathishKumar Mani | 0a01991 | 2012-09-11 12:33:11 -0700 | [diff] [blame] | 569 | ALOGD(" start\n"); |
Iliyan Malchev | 4765c43 | 2012-06-11 14:36:16 -0700 | [diff] [blame] | 570 | pcm->start = 1; |
| 571 | } |
| 572 | } |
| 573 | return 0; |
| 574 | } |
| 575 | |
| 576 | static int pcm_write_nmmap(struct pcm *pcm, void *data, unsigned count) |
| 577 | { |
| 578 | struct snd_xferi x; |
| 579 | int channels = (pcm->flags & PCM_MONO) ? 1 : ((pcm->flags & PCM_5POINT1)? 6 : 2 ); |
| 580 | |
| 581 | if (pcm->flags & PCM_IN) |
| 582 | return -EINVAL; |
| 583 | x.buf = data; |
| 584 | x.frames = (count / (channels * 2)) ; |
| 585 | |
| 586 | for (;;) { |
| 587 | if (!pcm->running) { |
| 588 | if (pcm_prepare(pcm)) |
| 589 | return -errno; |
| 590 | } |
| 591 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_WRITEI_FRAMES, &x)) { |
| 592 | if (errno == EPIPE) { |
| 593 | /* we failed to make our window -- try to restart */ |
| 594 | ALOGE("Underrun Error\n"); |
| 595 | pcm->underruns++; |
| 596 | pcm->running = 0; |
| 597 | continue; |
| 598 | } |
| 599 | return -errno; |
| 600 | } |
| 601 | if (pcm->flags & DEBUG_ON) |
| 602 | ALOGV("Sent frame\n"); |
| 603 | return 0; |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | int pcm_write(struct pcm *pcm, void *data, unsigned count) |
| 608 | { |
| 609 | if (pcm->flags & PCM_MMAP) |
| 610 | return pcm_write_mmap(pcm, data, count); |
| 611 | else |
| 612 | return pcm_write_nmmap(pcm, data, count); |
| 613 | } |
| 614 | |
| 615 | int pcm_read(struct pcm *pcm, void *data, unsigned count) |
| 616 | { |
| 617 | struct snd_xferi x; |
| 618 | |
| 619 | if (!(pcm->flags & PCM_IN)) |
| 620 | return -EINVAL; |
| 621 | |
| 622 | x.buf = data; |
| 623 | if (pcm->flags & PCM_MONO) { |
| 624 | x.frames = (count / 2); |
| 625 | } else if (pcm->flags & PCM_QUAD) { |
| 626 | x.frames = (count / 8); |
| 627 | } else if (pcm->flags & PCM_5POINT1) { |
| 628 | x.frames = (count / 12); |
| 629 | } else { |
| 630 | x.frames = (count / 4); |
| 631 | } |
| 632 | |
| 633 | for (;;) { |
| 634 | if (!pcm->running) { |
| 635 | if (pcm_prepare(pcm)) |
| 636 | return -errno; |
| 637 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_START)) { |
| 638 | ALOGE("Arec:SNDRV_PCM_IOCTL_START failed\n"); |
| 639 | return -errno; |
| 640 | } |
| 641 | pcm->running = 1; |
| 642 | } |
| 643 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_READI_FRAMES, &x)) { |
| 644 | if (errno == EPIPE) { |
| 645 | /* we failed to make our window -- try to restart */ |
| 646 | ALOGE("Arec:Overrun Error\n"); |
| 647 | pcm->underruns++; |
| 648 | pcm->running = 0; |
| 649 | continue; |
| 650 | } |
| 651 | ALOGE("Arec: error%d\n", errno); |
| 652 | return -errno; |
| 653 | } |
| 654 | return 0; |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | static struct pcm bad_pcm = { |
| 659 | .fd = -1, |
| 660 | }; |
| 661 | |
| 662 | static int enable_timer(struct pcm *pcm) { |
| 663 | |
| 664 | pcm->timer_fd = open("/dev/snd/timer", O_RDWR | O_NONBLOCK); |
| 665 | if (pcm->timer_fd < 0) { |
| 666 | close(pcm->fd); |
| 667 | ALOGE("cannot open timer device 'timer'"); |
| 668 | return &bad_pcm; |
| 669 | } |
| 670 | int arg = 1; |
| 671 | struct snd_timer_params timer_param; |
| 672 | struct snd_timer_select sel; |
| 673 | if (ioctl(pcm->timer_fd, SNDRV_TIMER_IOCTL_TREAD, &arg) < 0) { |
| 674 | ALOGE("extended read is not supported (SNDRV_TIMER_IOCTL_TREAD)\n"); |
| 675 | } |
| 676 | memset(&sel, 0, sizeof(sel)); |
| 677 | sel.id.dev_class = SNDRV_TIMER_CLASS_PCM; |
| 678 | sel.id.dev_sclass = SNDRV_TIMER_SCLASS_NONE; |
| 679 | sel.id.card = pcm->card_no; |
| 680 | sel.id.device = pcm->device_no; |
| 681 | if (pcm->flags & PCM_IN) |
| 682 | sel.id.subdevice = 1; |
| 683 | else |
| 684 | sel.id.subdevice = 0; |
| 685 | |
| 686 | if (pcm->flags & DEBUG_ON) { |
SathishKumar Mani | 0a01991 | 2012-09-11 12:33:11 -0700 | [diff] [blame] | 687 | ALOGD("sel.id.dev_class= %d\n", sel.id.dev_class); |
| 688 | ALOGD("sel.id.dev_sclass = %d\n", sel.id.dev_sclass); |
| 689 | ALOGD("sel.id.card = %d\n", sel.id.card); |
| 690 | ALOGD("sel.id.device = %d\n", sel.id.device); |
| 691 | ALOGD("sel.id.subdevice = %d\n", sel.id.subdevice); |
Iliyan Malchev | 4765c43 | 2012-06-11 14:36:16 -0700 | [diff] [blame] | 692 | } |
| 693 | if (ioctl(pcm->timer_fd, SNDRV_TIMER_IOCTL_SELECT, &sel) < 0) { |
| 694 | ALOGE("SNDRV_TIMER_IOCTL_SELECT failed.\n"); |
| 695 | close(pcm->timer_fd); |
| 696 | close(pcm->fd); |
| 697 | return &bad_pcm; |
| 698 | } |
| 699 | memset(&timer_param, 0, sizeof(struct snd_timer_params)); |
| 700 | timer_param.flags |= SNDRV_TIMER_PSFLG_AUTO; |
| 701 | timer_param.ticks = 1; |
| 702 | timer_param.filter = (1<<SNDRV_TIMER_EVENT_MSUSPEND) | (1<<SNDRV_TIMER_EVENT_MRESUME) | (1<<SNDRV_TIMER_EVENT_TICK); |
| 703 | |
| 704 | if (ioctl(pcm->timer_fd, SNDRV_TIMER_IOCTL_PARAMS, &timer_param)< 0) { |
| 705 | ALOGE("SNDRV_TIMER_IOCTL_PARAMS failed\n"); |
| 706 | } |
| 707 | if (ioctl(pcm->timer_fd, SNDRV_TIMER_IOCTL_START) < 0) { |
| 708 | close(pcm->timer_fd); |
| 709 | ALOGE("SNDRV_TIMER_IOCTL_START failed\n"); |
| 710 | } |
| 711 | return 0; |
| 712 | } |
| 713 | |
| 714 | static int disable_timer(struct pcm *pcm) { |
| 715 | if (pcm == &bad_pcm) |
| 716 | return 0; |
| 717 | if (ioctl(pcm->timer_fd, SNDRV_TIMER_IOCTL_STOP) < 0) |
| 718 | ALOGE("SNDRV_TIMER_IOCTL_STOP failed\n"); |
| 719 | return close(pcm->timer_fd); |
| 720 | } |
| 721 | |
| 722 | int pcm_close(struct pcm *pcm) |
| 723 | { |
| 724 | if (pcm == &bad_pcm) |
| 725 | return 0; |
| 726 | |
| 727 | if (pcm->flags & PCM_MMAP) { |
| 728 | disable_timer(pcm); |
| 729 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_DROP) < 0) { |
| 730 | ALOGE("Reset failed"); |
| 731 | } |
| 732 | |
| 733 | if (munmap(pcm->addr, pcm->buffer_size)) |
| 734 | ALOGE("munmap failed"); |
| 735 | |
| 736 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_HW_FREE) < 0) { |
| 737 | ALOGE("HW_FREE failed"); |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | if (pcm->fd >= 0) |
| 742 | close(pcm->fd); |
| 743 | pcm->running = 0; |
| 744 | pcm->buffer_size = 0; |
| 745 | pcm->fd = -1; |
| 746 | if (pcm->sw_p) |
| 747 | free(pcm->sw_p); |
| 748 | if (pcm->hw_p) |
| 749 | free(pcm->hw_p); |
| 750 | if (pcm->sync_ptr) |
| 751 | free(pcm->sync_ptr); |
| 752 | free(pcm); |
| 753 | return 0; |
| 754 | } |
| 755 | |
| 756 | struct pcm *pcm_open(unsigned flags, char *device) |
| 757 | { |
| 758 | char dname[19]; |
| 759 | struct pcm *pcm; |
| 760 | struct snd_pcm_info info; |
| 761 | struct snd_pcm_hw_params params; |
| 762 | struct snd_pcm_sw_params sparams; |
| 763 | unsigned period_sz; |
| 764 | unsigned period_cnt; |
| 765 | char *tmp; |
| 766 | |
| 767 | if (flags & DEBUG_ON) { |
| 768 | ALOGV("pcm_open(0x%08x)",flags); |
| 769 | ALOGV("device %s\n",device); |
| 770 | } |
| 771 | |
| 772 | pcm = calloc(1, sizeof(struct pcm)); |
| 773 | if (!pcm) |
| 774 | return &bad_pcm; |
| 775 | |
| 776 | tmp = device+4; |
| 777 | if ((strncmp(device, "hw:",3) != 0) || (strncmp(tmp, ",",1) != 0)){ |
| 778 | ALOGE("Wrong device fromat\n"); |
| 779 | free(pcm); |
| 780 | return -EINVAL; |
| 781 | } |
| 782 | |
| 783 | if (flags & PCM_IN) { |
| 784 | strlcpy(dname, "/dev/snd/pcmC", sizeof(dname)); |
| 785 | tmp = device+3; |
| 786 | strlcat(dname, tmp, (2+strlen(dname))) ; |
| 787 | pcm->card_no = atoi(tmp); |
| 788 | strlcat(dname, "D", (sizeof("D")+strlen(dname))); |
| 789 | tmp = device+5; |
| 790 | pcm->device_no = atoi(tmp); |
| 791 | /* should be safe to assume pcm dev ID never exceed 99 */ |
| 792 | if (pcm->device_no > 9) |
| 793 | strlcat(dname, tmp, (3+strlen(dname))); |
| 794 | else |
| 795 | strlcat(dname, tmp, (2+strlen(dname))); |
| 796 | strlcat(dname, "c", (sizeof("c")+strlen(dname))); |
| 797 | } else { |
| 798 | strlcpy(dname, "/dev/snd/pcmC", sizeof(dname)); |
| 799 | tmp = device+3; |
| 800 | strlcat(dname, tmp, (2+strlen(dname))) ; |
| 801 | pcm->card_no = atoi(tmp); |
| 802 | strlcat(dname, "D", (sizeof("D")+strlen(dname))); |
| 803 | tmp = device+5; |
| 804 | pcm->device_no = atoi(tmp); |
| 805 | /* should be safe to assume pcm dev ID never exceed 99 */ |
| 806 | if (pcm->device_no > 9) |
| 807 | strlcat(dname, tmp, (3+strlen(dname))); |
| 808 | else |
| 809 | strlcat(dname, tmp, (2+strlen(dname))); |
| 810 | strlcat(dname, "p", (sizeof("p")+strlen(dname))); |
| 811 | } |
| 812 | if (pcm->flags & DEBUG_ON) |
| 813 | ALOGV("Device name %s\n", dname); |
| 814 | |
| 815 | pcm->sync_ptr = calloc(1, sizeof(struct snd_pcm_sync_ptr)); |
| 816 | if (!pcm->sync_ptr) { |
| 817 | free(pcm); |
| 818 | return &bad_pcm; |
| 819 | } |
| 820 | pcm->flags = flags; |
| 821 | |
| 822 | pcm->fd = open(dname, O_RDWR|O_NONBLOCK); |
| 823 | if (pcm->fd < 0) { |
| 824 | free(pcm->sync_ptr); |
| 825 | free(pcm); |
| 826 | ALOGE("cannot open device '%s', errno %d", dname, errno); |
| 827 | return &bad_pcm; |
| 828 | } |
| 829 | |
| 830 | if (fcntl(pcm->fd, F_SETFL, fcntl(pcm->fd, F_GETFL) & |
| 831 | ~O_NONBLOCK) < 0) { |
| 832 | close(pcm->fd); |
| 833 | free(pcm->sync_ptr); |
| 834 | free(pcm); |
| 835 | ALOGE("failed to change the flag, errno %d", errno); |
| 836 | return &bad_pcm; |
| 837 | } |
| 838 | |
| 839 | if (pcm->flags & PCM_MMAP) |
| 840 | enable_timer(pcm); |
| 841 | |
| 842 | if (pcm->flags & DEBUG_ON) |
| 843 | ALOGV("pcm_open() %s\n", dname); |
| 844 | if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_INFO, &info)) { |
| 845 | ALOGE("cannot get info - %s", dname); |
| 846 | } |
| 847 | if (pcm->flags & DEBUG_ON) |
| 848 | info_dump(&info); |
| 849 | |
| 850 | return pcm; |
| 851 | } |
| 852 | |
| 853 | int pcm_ready(struct pcm *pcm) |
| 854 | { |
| 855 | return pcm->fd >= 0; |
| 856 | } |