The Android Open Source Project | e16cb84 | 2009-03-03 19:32:58 -0800 | [diff] [blame] | 1 | /* Copyright (C) 2008 The Android Open Source Project |
| 2 | */ |
| 3 | |
| 4 | #include <stdio.h> |
| 5 | #include <stdlib.h> |
| 6 | #include <fcntl.h> |
| 7 | #include <stdint.h> |
| 8 | #include <sys/mman.h> |
| 9 | #include <sys/ioctl.h> |
| 10 | |
| 11 | #include <linux/ioctl.h> |
| 12 | |
| 13 | #define AUDIO_IOCTL_MAGIC 'a' |
| 14 | |
| 15 | #define AUDIO_START _IOW(AUDIO_IOCTL_MAGIC, 0, unsigned) |
| 16 | #define AUDIO_STOP _IOW(AUDIO_IOCTL_MAGIC, 1, unsigned) |
| 17 | #define AUDIO_FLUSH _IOW(AUDIO_IOCTL_MAGIC, 2, unsigned) |
| 18 | #define AUDIO_GET_CONFIG _IOR(AUDIO_IOCTL_MAGIC, 3, unsigned) |
| 19 | #define AUDIO_SET_CONFIG _IOW(AUDIO_IOCTL_MAGIC, 4, unsigned) |
| 20 | #define AUDIO_GET_STATS _IOR(AUDIO_IOCTL_MAGIC, 5, unsigned) |
| 21 | |
| 22 | struct msm_audio_config { |
| 23 | uint32_t buffer_size; |
| 24 | uint32_t buffer_count; |
| 25 | uint32_t channel_count; |
| 26 | uint32_t sample_rate; |
| 27 | uint32_t codec_type; |
| 28 | uint32_t unused[3]; |
| 29 | }; |
| 30 | |
| 31 | struct msm_audio_stats { |
| 32 | uint32_t out_bytes; |
| 33 | uint32_t unused[3]; |
| 34 | }; |
| 35 | |
| 36 | int pcm_play(unsigned rate, unsigned channels, |
| 37 | int (*fill)(void *buf, unsigned sz, void *cookie), |
| 38 | void *cookie) |
| 39 | { |
| 40 | struct msm_audio_config config; |
| 41 | struct msm_audio_stats stats; |
| 42 | unsigned sz, n; |
| 43 | char buf[8192]; |
| 44 | int afd; |
| 45 | |
| 46 | afd = open("/dev/msm_pcm_out", O_RDWR); |
| 47 | if (afd < 0) { |
| 48 | perror("pcm_play: cannot open audio device"); |
| 49 | return -1; |
| 50 | } |
| 51 | |
| 52 | if(ioctl(afd, AUDIO_GET_CONFIG, &config)) { |
| 53 | perror("could not get config"); |
| 54 | return -1; |
| 55 | } |
| 56 | |
| 57 | config.channel_count = channels; |
| 58 | config.sample_rate = rate; |
| 59 | if (ioctl(afd, AUDIO_SET_CONFIG, &config)) { |
| 60 | perror("could not set config"); |
| 61 | return -1; |
| 62 | } |
| 63 | sz = config.buffer_size; |
| 64 | if (sz > sizeof(buf)) { |
| 65 | fprintf(stderr,"too big\n"); |
| 66 | return -1; |
| 67 | } |
| 68 | |
| 69 | fprintf(stderr,"prefill\n"); |
| 70 | for (n = 0; n < config.buffer_count; n++) { |
| 71 | if (fill(buf, sz, cookie)) |
| 72 | break; |
| 73 | if (write(afd, buf, sz) != sz) |
| 74 | break; |
| 75 | } |
| 76 | |
| 77 | fprintf(stderr,"start\n"); |
| 78 | ioctl(afd, AUDIO_START, 0); |
| 79 | |
| 80 | for (;;) { |
| 81 | #if 0 |
| 82 | if (ioctl(afd, AUDIO_GET_STATS, &stats) == 0) |
| 83 | fprintf(stderr,"%10d\n", stats.out_bytes); |
| 84 | #endif |
| 85 | if (fill(buf, sz, cookie)) |
| 86 | break; |
| 87 | if (write(afd, buf, sz) != sz) |
| 88 | break; |
| 89 | } |
| 90 | |
| 91 | done: |
| 92 | close(afd); |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | /* http://ccrma.stanford.edu/courses/422/projects/WaveFormat/ */ |
| 97 | |
| 98 | #define ID_RIFF 0x46464952 |
| 99 | #define ID_WAVE 0x45564157 |
| 100 | #define ID_FMT 0x20746d66 |
| 101 | #define ID_DATA 0x61746164 |
| 102 | |
| 103 | #define FORMAT_PCM 1 |
| 104 | |
| 105 | struct wav_header { |
| 106 | uint32_t riff_id; |
| 107 | uint32_t riff_sz; |
| 108 | uint32_t riff_fmt; |
| 109 | uint32_t fmt_id; |
| 110 | uint32_t fmt_sz; |
| 111 | uint16_t audio_format; |
| 112 | uint16_t num_channels; |
| 113 | uint32_t sample_rate; |
| 114 | uint32_t byte_rate; /* sample_rate * num_channels * bps / 8 */ |
| 115 | uint16_t block_align; /* num_channels * bps / 8 */ |
| 116 | uint16_t bits_per_sample; |
| 117 | uint32_t data_id; |
| 118 | uint32_t data_sz; |
| 119 | }; |
| 120 | |
| 121 | |
| 122 | static char *next; |
| 123 | static unsigned avail; |
| 124 | |
| 125 | int fill_buffer(void *buf, unsigned sz, void *cookie) |
| 126 | { |
| 127 | if (sz > avail) |
| 128 | return -1; |
| 129 | memcpy(buf, next, sz); |
| 130 | next += sz; |
| 131 | avail -= sz; |
| 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | void play_file(unsigned rate, unsigned channels, |
| 136 | int fd, unsigned count) |
| 137 | { |
| 138 | next = malloc(count); |
| 139 | if (!next) { |
| 140 | fprintf(stderr,"could not allocate %d bytes\n", count); |
| 141 | return; |
| 142 | } |
| 143 | if (read(fd, next, count) != count) { |
| 144 | fprintf(stderr,"could not read %d bytes\n", count); |
| 145 | return; |
| 146 | } |
| 147 | avail = count; |
| 148 | pcm_play(rate, channels, fill_buffer, 0); |
| 149 | } |
| 150 | |
| 151 | int wav_play(const char *fn) |
| 152 | { |
| 153 | struct wav_header hdr; |
| 154 | unsigned rate, channels; |
| 155 | int fd; |
| 156 | fd = open(fn, O_RDONLY); |
| 157 | if (fd < 0) { |
| 158 | fprintf(stderr, "playwav: cannot open '%s'\n", fn); |
| 159 | return -1; |
| 160 | } |
| 161 | if (read(fd, &hdr, sizeof(hdr)) != sizeof(hdr)) { |
| 162 | fprintf(stderr, "playwav: cannot read header\n"); |
| 163 | return -1; |
| 164 | } |
| 165 | fprintf(stderr,"playwav: %d ch, %d hz, %d bit, %s\n", |
| 166 | hdr.num_channels, hdr.sample_rate, hdr.bits_per_sample, |
| 167 | hdr.audio_format == FORMAT_PCM ? "PCM" : "unknown"); |
| 168 | |
| 169 | if ((hdr.riff_id != ID_RIFF) || |
| 170 | (hdr.riff_fmt != ID_WAVE) || |
| 171 | (hdr.fmt_id != ID_FMT)) { |
| 172 | fprintf(stderr, "playwav: '%s' is not a riff/wave file\n", fn); |
| 173 | return -1; |
| 174 | } |
| 175 | if ((hdr.audio_format != FORMAT_PCM) || |
| 176 | (hdr.fmt_sz != 16)) { |
| 177 | fprintf(stderr, "playwav: '%s' is not pcm format\n", fn); |
| 178 | return -1; |
| 179 | } |
| 180 | if (hdr.bits_per_sample != 16) { |
| 181 | fprintf(stderr, "playwav: '%s' is not 16bit per sample\n", fn); |
| 182 | return -1; |
| 183 | } |
| 184 | |
| 185 | play_file(hdr.sample_rate, hdr.num_channels, |
| 186 | fd, hdr.data_sz); |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | int wav_rec(const char *fn, unsigned channels, unsigned rate) |
| 192 | { |
| 193 | struct wav_header hdr; |
| 194 | unsigned char buf[8192]; |
| 195 | struct msm_audio_config cfg; |
| 196 | unsigned sz, n; |
| 197 | int fd, afd; |
| 198 | unsigned total = 0; |
| 199 | unsigned char tmp; |
| 200 | |
| 201 | hdr.riff_id = ID_RIFF; |
| 202 | hdr.riff_sz = 0; |
| 203 | hdr.riff_fmt = ID_WAVE; |
| 204 | hdr.fmt_id = ID_FMT; |
| 205 | hdr.fmt_sz = 16; |
| 206 | hdr.audio_format = FORMAT_PCM; |
| 207 | hdr.num_channels = channels; |
| 208 | hdr.sample_rate = rate; |
| 209 | hdr.byte_rate = hdr.sample_rate * hdr.num_channels * 2; |
| 210 | hdr.block_align = hdr.num_channels * 2; |
| 211 | hdr.bits_per_sample = 16; |
| 212 | hdr.data_id = ID_DATA; |
| 213 | hdr.data_sz = 0; |
| 214 | |
| 215 | fd = open(fn, O_CREAT | O_RDWR, 0666); |
| 216 | if (fd < 0) { |
| 217 | perror("cannot open output file"); |
| 218 | return -1; |
| 219 | } |
| 220 | write(fd, &hdr, sizeof(hdr)); |
| 221 | |
| 222 | afd = open("/dev/msm_pcm_in", O_RDWR); |
| 223 | if (afd < 0) { |
| 224 | perror("cannot open msm_pcm_in"); |
| 225 | close(fd); |
| 226 | return -1; |
| 227 | } |
| 228 | |
| 229 | /* config change should be a read-modify-write operation */ |
| 230 | if (ioctl(afd, AUDIO_GET_CONFIG, &cfg)) { |
| 231 | perror("cannot read audio config"); |
| 232 | goto fail; |
| 233 | } |
| 234 | |
| 235 | cfg.channel_count = hdr.num_channels; |
| 236 | cfg.sample_rate = hdr.sample_rate; |
| 237 | if (ioctl(afd, AUDIO_SET_CONFIG, &cfg)) { |
| 238 | perror("cannot write audio config"); |
| 239 | goto fail; |
| 240 | } |
| 241 | |
| 242 | if (ioctl(afd, AUDIO_GET_CONFIG, &cfg)) { |
| 243 | perror("cannot read audio config"); |
| 244 | goto fail; |
| 245 | } |
| 246 | |
| 247 | sz = cfg.buffer_size; |
| 248 | fprintf(stderr,"buffer size %d x %d\n", sz, cfg.buffer_count); |
| 249 | if (sz > sizeof(buf)) { |
| 250 | fprintf(stderr,"buffer size %d too large\n", sz); |
| 251 | goto fail; |
| 252 | } |
| 253 | |
| 254 | if (ioctl(afd, AUDIO_START, 0)) { |
| 255 | perror("cannot start audio"); |
| 256 | goto fail; |
| 257 | } |
| 258 | |
| 259 | fcntl(0, F_SETFL, O_NONBLOCK); |
| 260 | fprintf(stderr,"\n*** RECORDING * HIT ENTER TO STOP ***\n"); |
| 261 | |
| 262 | for (;;) { |
| 263 | while (read(0, &tmp, 1) == 1) { |
| 264 | if ((tmp == 13) || (tmp == 10)) goto done; |
| 265 | } |
| 266 | if (read(afd, buf, sz) != sz) { |
| 267 | perror("cannot read buffer"); |
| 268 | goto fail; |
| 269 | } |
| 270 | if (write(fd, buf, sz) != sz) { |
| 271 | perror("cannot write buffer"); |
| 272 | goto fail; |
| 273 | } |
| 274 | total += sz; |
| 275 | |
| 276 | } |
| 277 | done: |
| 278 | close(afd); |
| 279 | |
| 280 | /* update lengths in header */ |
| 281 | hdr.data_sz = total; |
| 282 | hdr.riff_sz = total + 8 + 16 + 8; |
| 283 | lseek(fd, 0, SEEK_SET); |
| 284 | write(fd, &hdr, sizeof(hdr)); |
| 285 | close(fd); |
| 286 | return 0; |
| 287 | |
| 288 | fail: |
| 289 | close(afd); |
| 290 | close(fd); |
| 291 | unlink(fn); |
| 292 | return -1; |
| 293 | } |
| 294 | |
| 295 | int mp3_play(const char *fn) |
| 296 | { |
| 297 | char buf[64*1024]; |
| 298 | int r; |
| 299 | int fd, afd; |
| 300 | |
| 301 | fd = open(fn, O_RDONLY); |
| 302 | if (fd < 0) { |
| 303 | perror("cannot open mp3 file"); |
| 304 | return -1; |
| 305 | } |
| 306 | |
| 307 | afd = open("/dev/msm_mp3", O_RDWR); |
| 308 | if (afd < 0) { |
| 309 | close(fd); |
| 310 | perror("cannot open mp3 output device"); |
| 311 | return -1; |
| 312 | } |
| 313 | |
| 314 | fprintf(stderr,"MP3 PLAY\n"); |
| 315 | ioctl(afd, AUDIO_START, 0); |
| 316 | |
| 317 | for (;;) { |
| 318 | r = read(fd, buf, 64*1024); |
| 319 | if (r <= 0) break; |
| 320 | r = write(afd, buf, r); |
| 321 | if (r < 0) break; |
| 322 | } |
| 323 | |
| 324 | close(fd); |
| 325 | close(afd); |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | int main(int argc, char **argv) |
| 330 | { |
| 331 | const char *fn = 0; |
| 332 | int play = 1; |
| 333 | unsigned channels = 1; |
| 334 | unsigned rate = 44100; |
| 335 | |
| 336 | argc--; |
| 337 | argv++; |
| 338 | while (argc > 0) { |
| 339 | if (!strcmp(argv[0],"-rec")) { |
| 340 | play = 0; |
| 341 | } else if (!strcmp(argv[0],"-play")) { |
| 342 | play = 1; |
| 343 | } else if (!strcmp(argv[0],"-stereo")) { |
| 344 | channels = 2; |
| 345 | } else if (!strcmp(argv[0],"-mono")) { |
| 346 | channels = 1; |
| 347 | } else if (!strcmp(argv[0],"-rate")) { |
| 348 | argc--; |
| 349 | argv++; |
| 350 | if (argc == 0) { |
| 351 | fprintf(stderr,"playwav: -rate requires a parameter\n"); |
| 352 | return -1; |
| 353 | } |
| 354 | rate = atoi(argv[0]); |
| 355 | } else { |
| 356 | fn = argv[0]; |
| 357 | } |
| 358 | argc--; |
| 359 | argv++; |
| 360 | } |
| 361 | |
| 362 | if (fn == 0) { |
| 363 | fn = play ? "/data/out.wav" : "/data/rec.wav"; |
| 364 | } |
| 365 | |
| 366 | if (play) { |
| 367 | const char *dot = strrchr(fn, '.'); |
| 368 | if (dot && !strcmp(dot,".mp3")) { |
| 369 | return mp3_play(fn); |
| 370 | } else { |
| 371 | return wav_play(fn); |
| 372 | } |
| 373 | } else { |
| 374 | return wav_rec(fn, channels, rate); |
| 375 | } |
| 376 | return 0; |
| 377 | } |