libavdevice/beosaudio.cpp

   1 /*
   2  * BeOS audio play interface
   3  * Copyright (c) 2000, 2001 Fabrice Bellard
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <signal.h>
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <sys/time.h>
  28
  29 #include <Application.h>
  30 #include <SoundPlayer.h>
  31
  32 extern "C" {
  33 #include "libavformat/avformat.h"
  34 }
  35
  36 #if HAVE_BSOUNDRECORDER
  37 #include <SoundRecorder.h>
  38 using namespace BPrivate::Media::Experimental;
  39 #endif
  40
  41 /* enable performance checks */
  42 //#define PERF_CHECK
  43
  44 /* enable Media Kit latency checks */
  45 //#define LATENCY_CHECK
  46
  47 #define AUDIO_BLOCK_SIZE 4096
  48 #define AUDIO_BLOCK_COUNT 8
  49
  50 #define AUDIO_BUFFER_SIZE (AUDIO_BLOCK_SIZE*AUDIO_BLOCK_COUNT)
  51
  52 typedef struct {
  53     int fd; // UNUSED
  54     int sample_rate;
  55     int channels;
  56     int frame_size; /* in bytes ! */
  57     CodecID codec_id;
  58     uint8_t buffer[AUDIO_BUFFER_SIZE];
  59     int buffer_ptr;
  60     /* ring buffer */
  61     sem_id input_sem;
  62     int input_index;
  63     sem_id output_sem;
  64     int output_index;
  65     BSoundPlayer *player;
  66 #if HAVE_BSOUNDRECORDER
  67     BSoundRecorder *recorder;
  68 #endif
  69     int has_quit; /* signal callbacks not to wait */
  70     volatile bigtime_t starve_time;
  71 } AudioData;
  72
  73 static thread_id main_thid;
  74 static thread_id bapp_thid;
  75 static int own_BApp_created = 0;
  76 static int refcount = 0;
  77
  78 /* create the BApplication and Run() it */
  79 static int32 bapp_thread(void *arg)
  80 {
  81     new BApplication("application/x-vnd.ffmpeg");
  82     own_BApp_created = 1;
  83     be_app->Run();
  84     /* kill the process group */
  85 //    kill(0, SIGINT);
  86 //    kill(main_thid, SIGHUP);
  87     return B_OK;
  88 }
  89
  90 /* create the BApplication only if needed */
  91 static void create_bapp_if_needed(void)
  92 {
  93     if (refcount++ == 0) {
  94         /* needed by libmedia */
  95         if (be_app == NULL) {
  96             bapp_thid = spawn_thread(bapp_thread, "ffmpeg BApplication", B_NORMAL_PRIORITY, NULL);
  97             resume_thread(bapp_thid);
  98             while (!own_BApp_created)
  99                 snooze(50000);
 100         }
 101     }
 102 }
 103
 104 static void destroy_bapp_if_needed(void)
 105 {
 106     if (--refcount == 0 && own_BApp_created) {
 107         be_app->Lock();
 108         be_app->Quit();
 109         be_app = NULL;
 110     }
 111 }
 112
 113 /* called back by BSoundPlayer */
 114 static void audioplay_callback(void *cookie, void *buffer, size_t bufferSize, const media_raw_audio_format &format)
 115 {
 116     AudioData *s;
 117     size_t len, amount;
 118     unsigned char *buf = (unsigned char *)buffer;
 119
 120     s = (AudioData *)cookie;
 121     if (s->has_quit)
 122         return;
 123     while (bufferSize > 0) {
 124 #ifdef PERF_CHECK
 125         bigtime_t t;
 126         t = system_time();
 127 #endif
 128         len = MIN(AUDIO_BLOCK_SIZE, bufferSize);
 129         if (acquire_sem_etc(s->output_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK) {
 130             s->has_quit = 1;
 131             s->player->SetHasData(false);
 132             return;
 133         }
 134         amount = MIN(len, (AUDIO_BUFFER_SIZE - s->output_index));
 135         memcpy(buf, &s->buffer[s->output_index], amount);
 136         s->output_index += amount;
 137         if (s->output_index >= AUDIO_BUFFER_SIZE) {
 138             s->output_index %= AUDIO_BUFFER_SIZE;
 139             memcpy(buf + amount, &s->buffer[s->output_index], len - amount);
 140             s->output_index += len-amount;
 141             s->output_index %= AUDIO_BUFFER_SIZE;
 142         }
 143         release_sem_etc(s->input_sem, len, 0);
 144 #ifdef PERF_CHECK
 145         t = system_time() - t;
 146         s->starve_time = MAX(s->starve_time, t);
 147 #endif
 148         buf += len;
 149         bufferSize -= len;
 150     }
 151 }
 152
 153 #if HAVE_BSOUNDRECORDER
 154 /* called back by BSoundRecorder */
 155 static void audiorecord_callback(void *cookie, bigtime_t timestamp, void *buffer, size_t bufferSize, const media_multi_audio_format &format)
 156 {
 157     AudioData *s;
 158     size_t len, amount;
 159     unsigned char *buf = (unsigned char *)buffer;
 160
 161     s = (AudioData *)cookie;
 162     if (s->has_quit)
 163         return;
 164
 165     while (bufferSize > 0) {
 166         len = MIN(bufferSize, AUDIO_BLOCK_SIZE);
 167         //printf("acquire_sem(input, %d)\n", len);
 168         if (acquire_sem_etc(s->input_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK) {
 169             s->has_quit = 1;
 170             return;
 171         }
 172         amount = MIN(len, (AUDIO_BUFFER_SIZE - s->input_index));
 173         memcpy(&s->buffer[s->input_index], buf, amount);
 174         s->input_index += amount;
 175         if (s->input_index >= AUDIO_BUFFER_SIZE) {
 176             s->input_index %= AUDIO_BUFFER_SIZE;
 177             memcpy(&s->buffer[s->input_index], buf + amount, len - amount);
 178             s->input_index += len - amount;
 179         }
 180         release_sem_etc(s->output_sem, len, 0);
 181         //printf("release_sem(output, %d)\n", len);
 182         buf += len;
 183         bufferSize -= len;
 184     }
 185 }
 186 #endif
 187
 188 static int audio_open(AudioData *s, int is_output, const char *audio_device)
 189 {
 190     int p[2];
 191     int ret;
 192     media_raw_audio_format format;
 193     media_multi_audio_format iformat;
 194
 195 #if !HAVE_BSOUNDRECORDER
 196     if (!is_output)
 197         return AVERROR(EIO); /* not for now */
 198 #endif
 199     s->input_sem = create_sem(AUDIO_BUFFER_SIZE, "ffmpeg_ringbuffer_input");
 200     if (s->input_sem < B_OK)
 201         return AVERROR(EIO);
 202     s->output_sem = create_sem(0, "ffmpeg_ringbuffer_output");
 203     if (s->output_sem < B_OK) {
 204         delete_sem(s->input_sem);
 205         return AVERROR(EIO);
 206     }
 207     s->input_index = 0;
 208     s->output_index = 0;
 209     create_bapp_if_needed();
 210     s->frame_size = AUDIO_BLOCK_SIZE;
 211     /* bump up the priority (avoid realtime though) */
 212     set_thread_priority(find_thread(NULL), B_DISPLAY_PRIORITY+1);
 213 #if HAVE_BSOUNDRECORDER
 214     if (!is_output) {
 215         bool wait_for_input = false;
 216         if (audio_device && !strcmp(audio_device, "wait:"))
 217             wait_for_input = true;
 218         s->recorder = new BSoundRecorder(&iformat, wait_for_input, "ffmpeg input", audiorecord_callback);
 219         if (wait_for_input && (s->recorder->InitCheck() == B_OK)) {
 220             s->recorder->WaitForIncomingConnection(&iformat);
 221         }
 222         if (s->recorder->InitCheck() != B_OK || iformat.format != media_raw_audio_format::B_AUDIO_SHORT) {
 223             delete s->recorder;
 224             s->recorder = NULL;
 225             if (s->input_sem)
 226                 delete_sem(s->input_sem);
 227             if (s->output_sem)
 228                 delete_sem(s->output_sem);
 229             return AVERROR(EIO);
 230         }
 231         s->codec_id = (iformat.byte_order == B_MEDIA_LITTLE_ENDIAN)?CODEC_ID_PCM_S16LE:CODEC_ID_PCM_S16BE;
 232         s->channels = iformat.channel_count;
 233         s->sample_rate = (int)iformat.frame_rate;
 234         s->frame_size = iformat.buffer_size;
 235         s->recorder->SetCookie(s);
 236         s->recorder->SetVolume(1.0);
 237         s->recorder->Start();
 238         return 0;
 239     }
 240 #endif
 241     format = media_raw_audio_format::wildcard;
 242     format.format = media_raw_audio_format::B_AUDIO_SHORT;
 243     format.byte_order = B_HOST_IS_LENDIAN ? B_MEDIA_LITTLE_ENDIAN : B_MEDIA_BIG_ENDIAN;
 244     format.channel_count = s->channels;
 245     format.buffer_size = s->frame_size;
 246     format.frame_rate = s->sample_rate;
 247     s->player = new BSoundPlayer(&format, "ffmpeg output", audioplay_callback);
 248     if (s->player->InitCheck() != B_OK) {
 249         delete s->player;
 250         s->player = NULL;
 251         if (s->input_sem)
 252             delete_sem(s->input_sem);
 253         if (s->output_sem)
 254             delete_sem(s->output_sem);
 255         return AVERROR(EIO);
 256     }
 257     s->player->SetCookie(s);
 258     s->player->SetVolume(1.0);
 259     s->player->Start();
 260     s->player->SetHasData(true);
 261     return 0;
 262 }
 263
 264 static int audio_close(AudioData *s)
 265 {
 266     if (s->input_sem)
 267         delete_sem(s->input_sem);
 268     if (s->output_sem)
 269         delete_sem(s->output_sem);
 270     s->has_quit = 1;
 271     if (s->player) {
 272         s->player->Stop();
 273     }
 274     if (s->player)
 275         delete s->player;
 276 #if HAVE_BSOUNDRECORDER
 277     if (s->recorder)
 278         delete s->recorder;
 279 #endif
 280     destroy_bapp_if_needed();
 281     return 0;
 282 }
 283
 284 /* sound output support */
 285 static int audio_write_header(AVFormatContext *s1)
 286 {
 287     AudioData *s = (AudioData *)s1->priv_data;
 288     AVStream *st;
 289     int ret;
 290
 291     st = s1->streams[0];
 292     s->sample_rate = st->codec->sample_rate;
 293     s->channels = st->codec->channels;
 294     ret = audio_open(s, 1, NULL);
 295     if (ret < 0)
 296         return AVERROR(EIO);
 297     return 0;
 298 }
 299
 300 static int audio_write_packet(AVFormatContext *s1, int stream_index,
 301                               const uint8_t *buf, int size, int64_t force_pts)
 302 {
 303     AudioData *s = (AudioData *)s1->priv_data;
 304     int len, ret;
 305 #ifdef LATENCY_CHECK
 306 bigtime_t lat1, lat2;
 307 lat1 = s->player->Latency();
 308 #endif
 309 #ifdef PERF_CHECK
 310     bigtime_t t = s->starve_time;
 311     s->starve_time = 0;
 312     printf("starve_time: %lld    \n", t);
 313 #endif
 314     while (size > 0) {
 315         int amount;
 316         len = MIN(size, AUDIO_BLOCK_SIZE);
 317         if (acquire_sem_etc(s->input_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK)
 318             return AVERROR(EIO);
 319         amount = MIN(len, (AUDIO_BUFFER_SIZE - s->input_index));
 320         memcpy(&s->buffer[s->input_index], buf, amount);
 321         s->input_index += amount;
 322         if (s->input_index >= AUDIO_BUFFER_SIZE) {
 323             s->input_index %= AUDIO_BUFFER_SIZE;
 324             memcpy(&s->buffer[s->input_index], buf + amount, len - amount);
 325             s->input_index += len - amount;
 326         }
 327         release_sem_etc(s->output_sem, len, 0);
 328         buf += len;
 329         size -= len;
 330     }
 331 #ifdef LATENCY_CHECK
 332 lat2 = s->player->Latency();
 333 printf("#### BSoundPlayer::Latency(): before= %lld, after= %lld\n", lat1, lat2);
 334 #endif
 335     return 0;
 336 }
 337
 338 static int audio_write_trailer(AVFormatContext *s1)
 339 {
 340     AudioData *s = (AudioData *)s1->priv_data;
 341
 342     audio_close(s);
 343     return 0;
 344 }
 345
 346 /* grab support */
 347
 348 static int audio_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 349 {
 350     AudioData *s = (AudioData *)s1->priv_data;
 351     AVStream *st;
 352     int ret;
 353
 354     if (!ap || ap->sample_rate <= 0 || ap->channels <= 0)
 355         return -1;
 356
 357     st = av_new_stream(s1, 0);
 358     if (!st) {
 359         return AVERROR(ENOMEM);
 360     }
 361     s->sample_rate = ap->sample_rate;
 362     s->channels = ap->channels;
 363
 364     ret = audio_open(s, 0, s1->filename);
 365     if (ret < 0) {
 366         av_free(st);
 367         return AVERROR(EIO);
 368     }
 369     /* take real parameters */
 370     st->codec->codec_type = CODEC_TYPE_AUDIO;
 371     st->codec->codec_id = s->codec_id;
 372     st->codec->sample_rate = s->sample_rate;
 373     st->codec->channels = s->channels;
 374     return 0;
 375     av_set_pts_info(s1, 48, 1, 1000000);  /* 48 bits pts in us */
 376 }
 377
 378 static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt)
 379 {
 380     AudioData *s = (AudioData *)s1->priv_data;
 381     int size;
 382     size_t len, amount;
 383     unsigned char *buf;
 384     status_t err;
 385
 386     if (av_new_packet(pkt, s->frame_size) < 0)
 387         return AVERROR(EIO);
 388     buf = (unsigned char *)pkt->data;
 389     size = pkt->size;
 390     while (size > 0) {
 391         len = MIN(AUDIO_BLOCK_SIZE, size);
 392         //printf("acquire_sem(output, %d)\n", len);
 393         while ((err=acquire_sem_etc(s->output_sem, len, B_CAN_INTERRUPT, 0LL)) == B_INTERRUPTED);
 394         if (err < B_OK) {
 395             av_free_packet(pkt);
 396             return AVERROR(EIO);
 397         }
 398         amount = MIN(len, (AUDIO_BUFFER_SIZE - s->output_index));
 399         memcpy(buf, &s->buffer[s->output_index], amount);
 400         s->output_index += amount;
 401         if (s->output_index >= AUDIO_BUFFER_SIZE) {
 402             s->output_index %= AUDIO_BUFFER_SIZE;
 403             memcpy(buf + amount, &s->buffer[s->output_index], len - amount);
 404             s->output_index += len-amount;
 405             s->output_index %= AUDIO_BUFFER_SIZE;
 406         }
 407         release_sem_etc(s->input_sem, len, 0);
 408         //printf("release_sem(input, %d)\n", len);
 409         buf += len;
 410         size -= len;
 411     }
 412     //XXX: add pts info
 413     return 0;
 414 }
 415
 416 static int audio_read_close(AVFormatContext *s1)
 417 {
 418     AudioData *s = (AudioData *)s1->priv_data;
 419
 420     audio_close(s);
 421     return 0;
 422 }
 423
 424 static AVInputFormat audio_beos_demuxer = {
 425     "audio_beos",
 426     NULL_IF_CONFIG_SMALL("audio grab and output"),
 427     sizeof(AudioData),
 428     NULL,
 429     audio_read_header,
 430     audio_read_packet,
 431     audio_read_close,
 432     NULL,
 433     AVFMT_NOFILE,
 434 };
 435
 436 AVOutputFormat audio_beos_muxer = {
 437     "audio_beos",
 438     NULL_IF_CONFIG_SMALL("audio grab and output"),
 439     "",
 440     "",
 441     sizeof(AudioData),
 442 #if HAVE_BIGENDIAN
 443     CODEC_ID_PCM_S16BE,
 444 #else
 445     CODEC_ID_PCM_S16LE,
 446 #endif
 447     CODEC_ID_NONE,
 448     audio_write_header,
 449     audio_write_packet,
 450     audio_write_trailer,
 451     AVFMT_NOFILE,
 452 };
 453
 454 extern "C" {
 455
 456 int audio_init(void)
 457 {
 458     main_thid = find_thread(NULL);
 459     av_register_input_format(&audio_beos_demuxer);
 460     av_register_output_format(&audio_beos_muxer);
 461     return 0;
 462 }
 463
 464 } // "C"
 465