beosaudio.cpp 12.8 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
/*
 * BeOS audio play interface
 * Copyright (c) 2000, 2001 Fabrice Bellard.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>

#include <Application.h>
#include <SoundPlayer.h>

extern "C" {
#include "avformat.h"
}

34 35
#ifdef HAVE_BSOUNDRECORDER
#include <SoundRecorder.h>
36
using namespace BPrivate::Media::Experimental;
37 38
#endif

39 40
/* enable performance checks */
//#define PERF_CHECK
41

42 43 44
/* enable Media Kit latency checks */
//#define LATENCY_CHECK

45
#define AUDIO_BLOCK_SIZE 4096
46 47 48 49
#define AUDIO_BLOCK_COUNT 8

#define AUDIO_BUFFER_SIZE (AUDIO_BLOCK_SIZE*AUDIO_BLOCK_COUNT)

50
typedef struct {
51
    int fd; // UNUSED
52 53 54 55
    int sample_rate;
    int channels;
    int frame_size; /* in bytes ! */
    CodecID codec_id;
56
    uint8_t buffer[AUDIO_BUFFER_SIZE];
57
    int buffer_ptr;
58 59 60 61 62
    /* ring buffer */
    sem_id input_sem;
    int input_index;
    sem_id output_sem;
    int output_index;
63
    BSoundPlayer *player;
64 65 66
#ifdef HAVE_BSOUNDRECORDER
    BSoundRecorder *recorder;
#endif
67
    int has_quit; /* signal callbacks not to wait */
68
    volatile bigtime_t starve_time;
69 70
} AudioData;

71 72
static thread_id main_thid;
static thread_id bapp_thid;
73
static int own_BApp_created = 0;
74
static int refcount = 0;
75 76 77 78 79 80 81 82

/* create the BApplication and Run() it */
static int32 bapp_thread(void *arg)
{
    new BApplication("application/x-vnd.ffmpeg");
    own_BApp_created = 1;
    be_app->Run();
    /* kill the process group */
83 84
//    kill(0, SIGINT);
//    kill(main_thid, SIGHUP);
85 86 87
    return B_OK;
}

88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110
/* create the BApplication only if needed */
static void create_bapp_if_needed(void)
{
    if (refcount++ == 0) {
        /* needed by libmedia */
        if (be_app == NULL) {
            bapp_thid = spawn_thread(bapp_thread, "ffmpeg BApplication", B_NORMAL_PRIORITY, NULL);
            resume_thread(bapp_thid);
            while (!own_BApp_created)
                snooze(50000);
        }
    }
}

static void destroy_bapp_if_needed(void)
{
    if (--refcount == 0 && own_BApp_created) {
        be_app->Lock();
        be_app->Quit();
        be_app = NULL;
    }
}

111 112 113 114
/* called back by BSoundPlayer */
static void audioplay_callback(void *cookie, void *buffer, size_t bufferSize, const media_raw_audio_format &format)
{
    AudioData *s;
115
    size_t len, amount;
116 117 118 119 120 121
    unsigned char *buf = (unsigned char *)buffer;

    s = (AudioData *)cookie;
    if (s->has_quit)
        return;
    while (bufferSize > 0) {
122 123 124 125 126 127 128
#ifdef PERF_CHECK
        bigtime_t t;
        t = system_time();
#endif
        len = MIN(AUDIO_BLOCK_SIZE, bufferSize);
        if (acquire_sem_etc(s->output_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK) {
            s->has_quit = 1;
129 130 131
            s->player->SetHasData(false);
            return;
        }
132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147
        amount = MIN(len, (AUDIO_BUFFER_SIZE - s->output_index));
        memcpy(buf, &s->buffer[s->output_index], amount);
        s->output_index += amount;
        if (s->output_index >= AUDIO_BUFFER_SIZE) {
            s->output_index %= AUDIO_BUFFER_SIZE;
            memcpy(buf + amount, &s->buffer[s->output_index], len - amount);
            s->output_index += len-amount;
            s->output_index %= AUDIO_BUFFER_SIZE;
        }
        release_sem_etc(s->input_sem, len, 0);
#ifdef PERF_CHECK
        t = system_time() - t;
        s->starve_time = MAX(s->starve_time, t);
#endif
        buf += len;
        bufferSize -= len;
148 149 150
    }
}

151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185
#ifdef HAVE_BSOUNDRECORDER
/* called back by BSoundRecorder */
static void audiorecord_callback(void *cookie, bigtime_t timestamp, void *buffer, size_t bufferSize, const media_multi_audio_format &format)
{
    AudioData *s;
    size_t len, amount;
    unsigned char *buf = (unsigned char *)buffer;

    s = (AudioData *)cookie;
    if (s->has_quit)
        return;

    while (bufferSize > 0) {
        len = MIN(bufferSize, AUDIO_BLOCK_SIZE);
        //printf("acquire_sem(input, %d)\n", len);
        if (acquire_sem_etc(s->input_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK) {
            s->has_quit = 1;
            return;
        }
        amount = MIN(len, (AUDIO_BUFFER_SIZE - s->input_index));
        memcpy(&s->buffer[s->input_index], buf, amount);
        s->input_index += amount;
        if (s->input_index >= AUDIO_BUFFER_SIZE) {
            s->input_index %= AUDIO_BUFFER_SIZE;
            memcpy(&s->buffer[s->input_index], buf + amount, len - amount);
            s->input_index += len - amount;
        }
        release_sem_etc(s->output_sem, len, 0);
        //printf("release_sem(output, %d)\n", len);
        buf += len;
        bufferSize -= len;
    }
}
#endif

186
static int audio_open(AudioData *s, int is_output, const char *audio_device)
187 188 189 190
{
    int p[2];
    int ret;
    media_raw_audio_format format;
191
    media_multi_audio_format iformat;
192

193
#ifndef HAVE_BSOUNDRECORDER
194 195
    if (!is_output)
        return -EIO; /* not for now */
196
#endif
197 198 199 200 201 202 203 204 205 206 207
    s->input_sem = create_sem(AUDIO_BUFFER_SIZE, "ffmpeg_ringbuffer_input");
    if (s->input_sem < B_OK)
        return -EIO;
    s->output_sem = create_sem(0, "ffmpeg_ringbuffer_output");
    if (s->output_sem < B_OK) {
        delete_sem(s->input_sem);
        return -EIO;
    }
    s->input_index = 0;
    s->output_index = 0;
    create_bapp_if_needed();
208
    s->frame_size = AUDIO_BLOCK_SIZE;
209 210 211 212
    /* bump up the priority (avoid realtime though) */
    set_thread_priority(find_thread(NULL), B_DISPLAY_PRIORITY+1);
#ifdef HAVE_BSOUNDRECORDER
    if (!is_output) {
213 214 215 216 217 218 219
        bool wait_for_input = false;
        if (audio_device && !strcmp(audio_device, "wait:"))
            wait_for_input = true;
        s->recorder = new BSoundRecorder(&iformat, wait_for_input, "ffmpeg input", audiorecord_callback);
        if (wait_for_input && (s->recorder->InitCheck() == B_OK)) {
            s->recorder->WaitForIncomingConnection(&iformat);
        }
220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238
        if (s->recorder->InitCheck() != B_OK || iformat.format != media_raw_audio_format::B_AUDIO_SHORT) {
            delete s->recorder;
            s->recorder = NULL;
            if (s->input_sem)
                delete_sem(s->input_sem);
            if (s->output_sem)
                delete_sem(s->output_sem);
            return -EIO;
        }
        s->codec_id = (iformat.byte_order == B_MEDIA_LITTLE_ENDIAN)?CODEC_ID_PCM_S16LE:CODEC_ID_PCM_S16BE;
        s->channels = iformat.channel_count;
        s->sample_rate = (int)iformat.frame_rate;
        s->frame_size = iformat.buffer_size;
        s->recorder->SetCookie(s);
        s->recorder->SetVolume(1.0);
        s->recorder->Start();
        return 0;
    }
#endif
239 240 241 242 243 244 245 246 247 248
    format = media_raw_audio_format::wildcard;
    format.format = media_raw_audio_format::B_AUDIO_SHORT;
    format.byte_order = B_HOST_IS_LENDIAN ? B_MEDIA_LITTLE_ENDIAN : B_MEDIA_BIG_ENDIAN;
    format.channel_count = s->channels;
    format.buffer_size = s->frame_size;
    format.frame_rate = s->sample_rate;
    s->player = new BSoundPlayer(&format, "ffmpeg output", audioplay_callback);
    if (s->player->InitCheck() != B_OK) {
        delete s->player;
        s->player = NULL;
249 250 251 252
        if (s->input_sem)
            delete_sem(s->input_sem);
        if (s->output_sem)
            delete_sem(s->output_sem);
253 254 255 256 257 258 259 260 261 262 263
        return -EIO;
    }
    s->player->SetCookie(s);
    s->player->SetVolume(1.0);
    s->player->Start();
    s->player->SetHasData(true);
    return 0;
}

static int audio_close(AudioData *s)
{
264 265 266 267
    if (s->input_sem)
        delete_sem(s->input_sem);
    if (s->output_sem)
        delete_sem(s->output_sem);
268 269 270 271 272 273
    s->has_quit = 1;
    if (s->player) {
        s->player->Stop();
    }
    if (s->player)
        delete s->player;
274 275 276 277
#ifdef HAVE_BSOUNDRECORDER
    if (s->recorder)
        delete s->recorder;
#endif
278
    destroy_bapp_if_needed();
279 280 281 282 283 284 285 286 287 288 289 290 291
    return 0;
}

/* sound output support */
static int audio_write_header(AVFormatContext *s1)
{
    AudioData *s = (AudioData *)s1->priv_data;
    AVStream *st;
    int ret;

    st = s1->streams[0];
    s->sample_rate = st->codec.sample_rate;
    s->channels = st->codec.channels;
292
    ret = audio_open(s, 1, NULL);
293 294 295 296 297 298
    if (ret < 0)
        return -EIO;
    return 0;
}

static int audio_write_packet(AVFormatContext *s1, int stream_index,
299
                              const uint8_t *buf, int size, int64_t force_pts)
300 301 302
{
    AudioData *s = (AudioData *)s1->priv_data;
    int len, ret;
303 304 305 306
#ifdef LATENCY_CHECK
bigtime_t lat1, lat2;
lat1 = s->player->Latency();
#endif
307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328
#ifdef PERF_CHECK
    bigtime_t t = s->starve_time;
    s->starve_time = 0;
    printf("starve_time: %lld    \n", t);
#endif
    while (size > 0) {
        int amount;
        len = MIN(size, AUDIO_BLOCK_SIZE);
        if (acquire_sem_etc(s->input_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK)
            return -EIO;
        amount = MIN(len, (AUDIO_BUFFER_SIZE - s->input_index));
        memcpy(&s->buffer[s->input_index], buf, amount);
        s->input_index += amount;
        if (s->input_index >= AUDIO_BUFFER_SIZE) {
            s->input_index %= AUDIO_BUFFER_SIZE;
            memcpy(&s->buffer[s->input_index], buf + amount, len - amount);
            s->input_index += len - amount;
        }
        release_sem_etc(s->output_sem, len, 0);
        buf += len;
        size -= len;
    }
329 330 331 332
#ifdef LATENCY_CHECK
lat2 = s->player->Latency();
printf("#### BSoundPlayer::Latency(): before= %lld, after= %lld\n", lat1, lat2);
#endif
333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361
    return 0;
}

static int audio_write_trailer(AVFormatContext *s1)
{
    AudioData *s = (AudioData *)s1->priv_data;

    audio_close(s);
    return 0;
}

/* grab support */

static int audio_read_header(AVFormatContext *s1, AVFormatParameters *ap)
{
    AudioData *s = (AudioData *)s1->priv_data;
    AVStream *st;
    int ret;

    if (!ap || ap->sample_rate <= 0 || ap->channels <= 0)
        return -1;

    st = av_new_stream(s1, 0);
    if (!st) {
        return -ENOMEM;
    }
    s->sample_rate = ap->sample_rate;
    s->channels = ap->channels;

362
    ret = audio_open(s, 0, ap->device);
363 364 365 366
    if (ret < 0) {
        av_free(st);
        return -EIO;
    }
367 368 369 370 371 372 373
    /* take real parameters */
    st->codec.codec_type = CODEC_TYPE_AUDIO;
    st->codec.codec_id = s->codec_id;
    st->codec.sample_rate = s->sample_rate;
    st->codec.channels = s->channels;
    return 0;
    av_set_pts_info(s1, 48, 1, 1000000);  /* 48 bits pts in us */
374 375 376 377 378
}

static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt)
{
    AudioData *s = (AudioData *)s1->priv_data;
379 380 381 382
    int size;
    size_t len, amount;
    unsigned char *buf;
    status_t err;
383 384 385

    if (av_new_packet(pkt, s->frame_size) < 0)
        return -EIO;
386 387 388 389 390 391 392
    buf = (unsigned char *)pkt->data;
    size = pkt->size;
    while (size > 0) {
        len = MIN(AUDIO_BLOCK_SIZE, size);
        //printf("acquire_sem(output, %d)\n", len);
        while ((err=acquire_sem_etc(s->output_sem, len, B_CAN_INTERRUPT, 0LL)) == B_INTERRUPTED);
        if (err < B_OK) {
393 394 395
            av_free_packet(pkt);
            return -EIO;
        }
396 397 398 399 400 401 402 403 404 405 406 407 408
        amount = MIN(len, (AUDIO_BUFFER_SIZE - s->output_index));
        memcpy(buf, &s->buffer[s->output_index], amount);
        s->output_index += amount;
        if (s->output_index >= AUDIO_BUFFER_SIZE) {
            s->output_index %= AUDIO_BUFFER_SIZE;
            memcpy(buf + amount, &s->buffer[s->output_index], len - amount);
            s->output_index += len-amount;
            s->output_index %= AUDIO_BUFFER_SIZE;
        }
        release_sem_etc(s->input_sem, len, 0);
        //printf("release_sem(input, %d)\n", len);
        buf += len;
        size -= len;
409
    }
410
    //XXX: add pts info
411 412 413 414 415 416 417 418 419 420 421
    return 0;
}

static int audio_read_close(AVFormatContext *s1)
{
    AudioData *s = (AudioData *)s1->priv_data;

    audio_close(s);
    return 0;
}

422
static AVInputFormat audio_in_format = {
423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455
    "audio_device",
    "audio grab and output",
    sizeof(AudioData),
    NULL,
    audio_read_header,
    audio_read_packet,
    audio_read_close,
    NULL,
    AVFMT_NOFILE,
};

AVOutputFormat audio_out_format = {
    "audio_device",
    "audio grab and output",
    "",
    "",
    sizeof(AudioData),
#ifdef WORDS_BIGENDIAN
    CODEC_ID_PCM_S16BE,
#else
    CODEC_ID_PCM_S16LE,
#endif
    CODEC_ID_NONE,
    audio_write_header,
    audio_write_packet,
    audio_write_trailer,
    AVFMT_NOFILE,
};

extern "C" {

int audio_init(void)
{
456
    main_thid = find_thread(NULL);
457 458 459 460 461 462 463
    av_register_input_format(&audio_in_format);
    av_register_output_format(&audio_out_format);
    return 0;
}

} // "C"