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libeplayer3/ffmpeg: rearrange seeking code

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This commit is contained in:
martii
2013-11-21 19:25:20 +01:00
parent df8103d5bb
commit 71c48b5faf
1 changed files with 54 additions and 175 deletions
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229
libeplayer3/container/container_ffmpeg.c
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@@ -98,7 +98,6 @@ static const char* FILENAME = "container_ffmpeg.c";
/* Varaibles */
/* ***************************** */
static pthread_mutex_t mutex;
static pthread_t PlayThread;
static int hasPlayThreadStarted = 0;
@@ -109,11 +108,7 @@ static unsigned char isContainerRunning = 0;
static long long int latestPts = 0;
static int restart_audio_resampling = 0;
static off_t seek_target_bytes = 0;
static int do_seek_target_bytes = 0;
static int64_t seek_target_seconds = 0.0;
static int do_seek_target_seconds = 0;
float seek_sec_abs = 0.0, seek_sec_rel = 0.0;
/* ***************************** */
/* Prototypes */
@@ -124,31 +119,6 @@ static int container_ffmpeg_seek(Context_t *context, float sec, int absolute);
/* MISC Functions */
/* ***************************** */
static int mutexInitialized = 0;
static void initMutex(void)
{
pthread_mutex_init(&mutex, NULL);
mutexInitialized = 1;
}
static void getMutex(const char *filename __attribute__((unused)), const char *function __attribute__((unused)), int line) {
ffmpeg_printf(100, "::%d requesting mutex\n", line);
if (!mutexInitialized)
initMutex();
pthread_mutex_lock(&mutex);
ffmpeg_printf(100, "::%d received mutex\n", line);
}
static void releaseMutex(const char *filename __attribute__((unused)), const const char *function __attribute__((unused)), int line) {
pthread_mutex_unlock(&mutex);
ffmpeg_printf(100, "::%d released mutex\n", line);
}
static char* Codec2Encoding(AVCodecContext *codec, int* version)
{
fprintf(stderr, "Codec ID: %ld (%.8lx)\n", (long)codec->codec_id, (long)codec->codec_id);
@@ -326,6 +296,9 @@ static void FFMPEGThread(Context_t *context) {
strncpy(threadname, __func__, sizeof(threadname));
threadname[16] = 0;
prctl (PR_SET_NAME, (unsigned long)&threadname);
hasPlayThreadStarted = 1;
int64_t lastPts = -1, currentVideoPts = -1, currentAudioPts = -1, showtime = 0, bofcount = 0;
off_t lastPos = -1;
AudioVideoOut_t avOut;
@@ -335,6 +308,7 @@ static void FFMPEGThread(Context_t *context) {
int out_sample_rate = 44100;
int out_channels = 2;
uint64_t out_channel_layout = AV_CH_LAYOUT_STEREO;
int restart_audio_resampling = 0;
ffmpeg_printf(10, "\n");
@@ -355,28 +329,41 @@ static void FFMPEGThread(Context_t *context) {
continue;
}
if (context->playback->isSeeking) {
ffmpeg_printf(10, "seeking\n");
usleep(100000);
continue;
}
getMutex(FILENAME, __FUNCTION__,__LINE__);
if (!context->playback || !context->playback->isPlaying) {
releaseMutex(FILENAME, __FUNCTION__,__LINE__);
if (!context->playback || !context->playback->isPlaying)
continue;
}
if (context->playback->BackWard && av_gettime() >= showtime)
{
int seek_target_flag = 0;
int64_t seek_target = INT64_MIN;
if (seek_sec_rel != 0.0) {
if (avContext->iformat->flags & AVFMT_TS_DISCONT) {
float br = (avContext->bit_rate) ? br = avContext->bit_rate / 8.0 : 180000.0;
seek_target_flag = AVSEEK_FLAG_BYTE;
seek_target = avio_tell(avContext->pb) + seek_sec_rel * br;
} else {
lastPts = (currentVideoPts > 0) ? currentVideoPts : currentAudioPts;
if (lastPts > 0)
seek_target = ((currentVideoPts > 0) ? currentVideoPts : currentAudioPts) + seek_sec_rel * AV_TIME_BASE;
}
seek_sec_rel = 0.0;
lastPts = -1;
lastPos = -1;
} else if (seek_sec_abs != 0.0) {
if (avContext->iformat->flags & AVFMT_TS_DISCONT) {
float br = (avContext->bit_rate) ? br = avContext->bit_rate / 8.0 : 180000.0;
seek_target_flag = AVSEEK_FLAG_BYTE;
seek_target = seek_sec_abs * br;
} else {
seek_target = seek_sec_abs * AV_TIME_BASE;
}
seek_sec_abs = 0.0;
lastPts = -1;
lastPos = -1;
} else if (context->playback->BackWard && av_gettime() >= showtime) {
context->output->Command(context, OUTPUT_CLEAR, "video");
if(bofcount == 1)
{
if(bofcount == 1) {
showtime = av_gettime();
releaseMutex(FILENAME, __FUNCTION__,__LINE__);
usleep(100000);
continue;
}
@@ -391,20 +378,17 @@ static void FFMPEGThread(Context_t *context) {
br = avContext->bit_rate / 8.0;
else
br = 180000.0;
do_seek_target_seconds = 0;
do_seek_target_bytes = 1;
lastPos += context->playback->Speed * 8 * br;
seek_target_bytes = lastPos;
seek_target_flag = AVSEEK_FLAG_BYTE;
seek_target = lastPos;
}
} else {
if (lastPts < 0)
lastPts = (currentVideoPts > 0) ? currentVideoPts : currentAudioPts;
if (lastPts > 0) {
do_seek_target_seconds = 1;
do_seek_target_bytes = 0;
lastPts += context->playback->Speed * 8 * AV_TIME_BASE;
seek_target_seconds = lastPts;
seek_target = lastPts;
}
}
showtime = av_gettime() + 300000; //jump back every 300ms
@@ -414,21 +398,15 @@ static void FFMPEGThread(Context_t *context) {
lastPts = -1, lastPos = -1;
}
if (do_seek_target_seconds || do_seek_target_bytes) {
if (seek_target > INT64_MIN) {
int res;
if (do_seek_target_seconds) {
if (seek_target_seconds < 0)
seek_target_seconds = 0;
res = avformat_seek_file(avContext, -1, INT64_MIN, seek_target_seconds, INT64_MAX, 0);
} else {
if (seek_target_bytes < 0)
seek_target_bytes = 0;
res = avformat_seek_file(avContext, -1, INT64_MIN, seek_target_bytes, INT64_MAX, AVSEEK_FLAG_BYTE);
}
if (seek_target < 0)
seek_target = 0;
res = avformat_seek_file(avContext, -1, INT64_MIN, seek_target, INT64_MAX, seek_target_flag);
if (res < 0 && context->playback->BackWard)
bofcount = 1;
do_seek_target_seconds = do_seek_target_bytes = 0;
seek_target = INT64_MIN;
restart_audio_resampling = 1;
latestPts = 0;
@@ -437,7 +415,6 @@ static void FFMPEGThread(Context_t *context) {
for (i = 0; i < avContext->nb_streams; i++)
if (avContext->streams[i]->codec && avContext->streams[i]->codec->codec)
avcodec_flush_buffers(avContext->streams[i]->codec);
}
AVPacket packet;
@@ -446,13 +423,11 @@ static void FFMPEGThread(Context_t *context) {
int av_res = av_read_frame(avContext, &packet);
if (av_res == AVERROR(EAGAIN)) {
av_free_packet(&packet);
releaseMutex(FILENAME, __FUNCTION__,__LINE__);
continue;
}
if (av_res) { // av_read_frame failed
ffmpeg_err("no data ->end of file reached ?\n");
av_free_packet(&packet);
releaseMutex(FILENAME, __FUNCTION__,__LINE__);
break; // while
}
long long int pts;
@@ -844,7 +819,6 @@ static void FFMPEGThread(Context_t *context) {
}
av_free_packet(&packet);
releaseMutex(FILENAME, __FUNCTION__,__LINE__);
} /* while */
if (context && context->playback && context->output && context->playback->abortRequested)
@@ -855,7 +829,11 @@ static void FFMPEGThread(Context_t *context) {
if (decoded_frame)
avcodec_free_frame(&decoded_frame);
avformat_close_input(&avContext);
hasPlayThreadStarted = 0;
if (context->playback)
context->playback->isPlaying = 0;
ffmpeg_printf(10, "terminating\n");
}
@@ -1380,19 +1358,14 @@ static int container_ffmpeg_play(Context_t *context)
if((error = pthread_create(&PlayThread, &attr, (void *)&FFMPEGThread, context)) != 0) {
ffmpeg_printf(10, "Error creating thread, error:%d:%s\n", error,strerror(error));
hasPlayThreadStarted = 0;
ret = cERR_CONTAINER_FFMPEG_ERR;
}
else {
ffmpeg_printf(10, "Created thread\n");
hasPlayThreadStarted = 1;
}
}
else {
ffmpeg_printf(10, "A thread already exists!\n");
ret = cERR_CONTAINER_FFMPEG_ERR;
}
@@ -1403,7 +1376,6 @@ static int container_ffmpeg_play(Context_t *context)
static int container_ffmpeg_stop(Context_t *context) {
int ret = cERR_CONTAINER_FFMPEG_NO_ERROR;
int wait_time = 20;
ffmpeg_printf(10, "\n");
@@ -1412,124 +1384,31 @@ static int container_ffmpeg_stop(Context_t *context) {
ffmpeg_err("Container not running\n");
return cERR_CONTAINER_FFMPEG_ERR;
}
if (context->playback)
if (context->playback) {
context->playback->isPlaying = 0;
context->playback->abortRequested = 1;
}
while ( (hasPlayThreadStarted != 0) && (--wait_time) > 0 ) {
ffmpeg_printf(10, "Waiting for ffmpeg thread to terminate itself, will try another %d times\n", wait_time);
while (hasPlayThreadStarted != 0)
usleep(100000);
}
if (wait_time == 0) {
ffmpeg_err( "Timeout waiting for thread!\n");
ret = cERR_CONTAINER_FFMPEG_ERR;
}
hasPlayThreadStarted = 0;
terminating = 1;
getMutex(FILENAME, __FUNCTION__,__LINE__);
if (avContext)
avformat_close_input(&avContext);
isContainerRunning = 0;
avformat_network_deinit();
releaseMutex(FILENAME, __FUNCTION__,__LINE__);
ffmpeg_printf(10, "ret %d\n", ret);
return ret;
}
static int container_ffmpeg_seek(Context_t *context, float sec, int absolute) {
Track_t * videoTrack = NULL;
Track_t * audioTrack = NULL;
Track_t * current = NULL;
if (absolute) {
ffmpeg_printf(10, "goto %f sec\n", sec);
if (sec < 0.0)
sec = 0.0;
} else {
ffmpeg_printf(10, "seeking %f sec\n", sec);
if (sec == 0.0)
{
ffmpeg_err("sec = 0.0 ignoring\n");
return cERR_CONTAINER_FFMPEG_ERR;
}
}
context->manager->video->Command(context, MANAGER_GET_TRACK, &videoTrack);
context->manager->audio->Command(context, MANAGER_GET_TRACK, &audioTrack);
if (videoTrack != NULL)
current = videoTrack;
else if (audioTrack != NULL)
current = audioTrack;
if (current == NULL) {
ffmpeg_err( "no track available to seek\n");
return cERR_CONTAINER_FFMPEG_ERR;
}
getMutex(FILENAME, __FUNCTION__,__LINE__);
if (!context->playback || !context->playback->isPlaying) {
releaseMutex(FILENAME, __FUNCTION__,__LINE__);
return cERR_CONTAINER_FFMPEG_NO_ERROR;
}
ffmpeg_printf(10, "iformat->flags %d\n", avContext->iformat->flags);
if (avContext->iformat->flags & AVFMT_TS_DISCONT)
{
/* konfetti: for ts streams seeking frame per seconds does not work (why?).
* I take this algo partly from ffplay.c.
*
* seeking per HTTP does still not work very good. forward seeks everytime
* about 10 seconds, backward does not work.
*/
off_t pos = avio_tell(avContext->pb);
ffmpeg_printf(10, "pos %lld %d\n", pos, avContext->bit_rate);
if (avContext->bit_rate)
{
sec *= avContext->bit_rate / 8.0;
ffmpeg_printf(10, "bit_rate %d\n", avContext->bit_rate);
}
else
{
sec *= 180000.0;
}
static int container_ffmpeg_seek(Context_t *context __attribute__((unused)), float sec, int absolute) {
if (absolute)
pos = sec;
seek_sec_abs = sec, seek_sec_rel = 0.0;
else
pos += sec;
if (pos < 0)
pos = 0;
ffmpeg_printf(10, "1. seeking to position %lld bytes ->sec %f\n", pos, sec);
seek_target_bytes = pos;
do_seek_target_bytes = 1;
} else
{
if (!absolute)
sec += ((float) current->pts / 90000.0f);
ffmpeg_printf(10, "2. seeking to position %f sec ->time base %f %d\n", sec, av_q2d(((AVStream*) current->stream)->time_base), AV_TIME_BASE);
seek_target_seconds = sec * AV_TIME_BASE;
do_seek_target_seconds = 1;
}
releaseMutex(FILENAME, __FUNCTION__,__LINE__);
seek_sec_abs = 0.0, seek_sec_rel = sec;
return cERR_CONTAINER_FFMPEG_NO_ERROR;
}