int dc_video_decoder_read(VideoInputFile *video_input_file, VideoInputData *video_input_data, int source_number, int use_source_timing, int is_live_capture, const int *exit_signal_addr)
{
#ifdef DASHCAST_DEBUG_TIME_
struct timeval start, end;
long elapsed_time;
#endif
AVPacket packet;
int ret, got_frame, already_locked = 0;
AVCodecContext *codec_ctx;
VideoDataNode *video_data_node;
/* Get a pointer to the codec context for the video stream */
codec_ctx = video_input_file->av_fmt_ctx->streams[video_input_file->vstream_idx]->codec;
/* Read frames */
while (1) {
#ifdef DASHCAST_DEBUG_TIME_
gf_gettimeofday(&start, NULL);
#endif
memset(&packet, 0, sizeof(AVPacket));
ret = av_read_frame(video_input_file->av_fmt_ctx, &packet);
#ifdef DASHCAST_DEBUG_TIME_
gf_gettimeofday(&end, NULL);
elapsed_time = (end.tv_sec * 1000000 + end.tv_usec) - (start.tv_sec * 1000000 + start.tv_usec);
fprintf(stdout, "fps: %f\n", 1000000.0/elapsed_time);
#endif
/* If we demux for the audio thread, send the packet to the audio */
if (video_input_file->av_fmt_ctx_ref_cnt && ((packet.stream_index != video_input_file->vstream_idx) || (ret == AVERROR_EOF))) {
AVPacket *packet_copy = NULL;
if (ret != AVERROR_EOF) {
GF_SAFEALLOC(packet_copy, AVPacket);
memcpy(packet_copy, &packet, sizeof(AVPacket));
}
assert(video_input_file->av_pkt_list);
gf_mx_p(video_input_file->av_pkt_list_mutex);
gf_list_add(video_input_file->av_pkt_list, packet_copy);
gf_mx_v(video_input_file->av_pkt_list_mutex);
if (ret != AVERROR_EOF) {
continue;
}
}
if (ret == AVERROR_EOF) {
if (video_input_file->mode == LIVE_MEDIA && video_input_file->no_loop == 0) {
av_seek_frame(video_input_file->av_fmt_ctx, video_input_file->vstream_idx, 0, 0);
av_free_packet(&packet);
continue;
}
dc_producer_lock(&video_input_data->producer, &video_input_data->circular_buf);
dc_producer_unlock_previous(&video_input_data->producer, &video_input_data->circular_buf);
video_data_node = (VideoDataNode *) dc_producer_produce(&video_input_data->producer, &video_input_data->circular_buf);
video_data_node->source_number = source_number;
/* Flush decoder */
memset(&packet, 0, sizeof(AVPacket));
#ifndef FF_API_AVFRAME_LAVC
avcodec_get_frame_defaults(video_data_node->vframe);
#else
av_frame_unref(video_data_node->vframe);
#endif
avcodec_decode_video2(codec_ctx, video_data_node->vframe, &got_frame, &packet);
if (got_frame) {
dc_producer_advance(&video_input_data->producer, &video_input_data->circular_buf);
return 0;
}
dc_producer_end_signal(&video_input_data->producer, &video_input_data->circular_buf);
dc_producer_unlock(&video_input_data->producer, &video_input_data->circular_buf);
return -2;
}
else if (ret < 0)
{
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("Cannot read video frame.\n"));
continue;
}
/* Is this a packet from the video stream? */
if (packet.stream_index == video_input_file->vstream_idx) {
u32 nb_retry = 10;
while (!already_locked) {
if (dc_producer_lock(&video_input_data->producer, &video_input_data->circular_buf) < 0) {
if (!nb_retry) break;
gf_sleep(10);
nb_retry--;
continue;
}
dc_producer_unlock_previous(&video_input_data->producer, &video_input_data->circular_buf);
already_locked = 1;
}
if (!already_locked) {
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("[dashcast] Live system dropped a video frame\n"));
continue;
}
video_data_node = (VideoDataNode *) dc_producer_produce(&video_input_data->producer, &video_input_data->circular_buf);
video_data_node->source_number = source_number;
/* Set video frame to default */
#ifndef FF_API_AVFRAME_LAVC
avcodec_get_frame_defaults(video_data_node->vframe);
#else
av_frame_unref(video_data_node->vframe);
#endif
/* Decode video frame */
if (avcodec_decode_video2(codec_ctx, video_data_node->vframe, &got_frame, &packet) < 0) {
av_free_packet(&packet);
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("Error while decoding video.\n"));
dc_producer_end_signal(&video_input_data->producer, &video_input_data->circular_buf);
dc_producer_unlock(&video_input_data->producer, &video_input_data->circular_buf);
return -1;
}
/* Did we get a video frame? */
if (got_frame) {
if (use_source_timing && is_live_capture) {
u64 pts;
if (video_input_file->pts_init == 0) {
video_input_file->pts_init = 1;
video_input_file->utc_at_init = gf_net_get_utc();
video_input_file->first_pts = packet.pts;
video_input_file->prev_pts = 0;
video_input_data->frame_duration = 0;
}
if (video_input_file->pts_init && (video_input_file->pts_init!=3) ) {
if (packet.pts==AV_NOPTS_VALUE) {
video_input_file->pts_init=1;
} else if (video_input_file->pts_init==1) {
video_input_file->pts_init=2;
video_input_file->pts_dur_estimate = packet.pts;
} else if (video_input_file->pts_init==2) {
video_input_file->pts_init=3;
video_input_data->frame_duration = packet.pts - video_input_file->pts_dur_estimate;
video_input_file->sync_tolerance = 9*video_input_data->frame_duration/5;
//TODO - check with audio if sync is OK
}
}
//move to 0-based PTS
if (packet.pts!=AV_NOPTS_VALUE) {
pts = packet.pts - video_input_file->first_pts;
} else {
pts = video_input_file->prev_pts + video_input_data->frame_duration;
}
//check for drop frames
#ifndef GPAC_DISABLE_LOG
if (0 && gf_log_tool_level_on(GF_LOG_DASH, GF_LOG_WARNING)) {
if (pts - video_input_file->prev_pts > video_input_file->sync_tolerance) {
u32 nb_lost=0;
while (video_input_file->prev_pts + video_input_data->frame_duration + video_input_file->sync_tolerance < pts) {
video_input_file->prev_pts += video_input_data->frame_duration;
nb_lost++;
}
if (nb_lost) {
GF_LOG(GF_LOG_WARNING, GF_LOG_DASH, ("[DashCast] Capture lost %d video frames \n", nb_lost));
}
}
}
#endif
video_input_file->prev_pts = pts;
video_data_node->vframe->pts = pts;
}
if (video_data_node->vframe->pts==AV_NOPTS_VALUE) {
if (!use_source_timing) {
video_data_node->vframe->pts = video_input_file->frame_decoded;
} else {
video_data_node->vframe->pts = video_data_node->vframe->pkt_pts;
}
}
video_input_file->frame_decoded++;
GF_LOG(GF_LOG_DEBUG, GF_LOG_DASH, ("[DashCast] Video Frame TS "LLU" decoded at UTC "LLU" ms\n", video_data_node->vframe->pts, gf_net_get_utc() ));
// For a decode/encode process we must free this memory.
//But if the input is raw and there is no need to decode then
// the packet is directly passed for decoded frame. We must wait until rescale is done before freeing it
if (codec_ctx->codec->id == CODEC_ID_RAWVIDEO) {
video_data_node->nb_raw_frames_ref = video_input_file->nb_consumers;
video_data_node->raw_packet = packet;
dc_producer_advance(&video_input_data->producer, &video_input_data->circular_buf);
while (video_data_node->nb_raw_frames_ref && ! *exit_signal_addr) {
gf_sleep(0);
}
} else {
dc_producer_advance(&video_input_data->producer, &video_input_data->circular_buf);
av_free_packet(&packet);
}
return 0;
}
}
/* Free the packet that was allocated by av_read_frame */
av_free_packet(&packet);
}
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("Unknown error while reading video frame.\n"));
return -1;
}
void dc_video_scaler_end_signal(VideoScaledData *video_scaled_data)
{
dc_producer_end_signal(&video_scaled_data->producer, &video_scaled_data->circular_buf);
dc_producer_unlock_previous(&video_scaled_data->producer, &video_scaled_data->circular_buf);
}
int dc_video_scaler_scale(VideoInputData *video_input_data, VideoScaledData *video_scaled_data)
{
int ret, index, src_height;
VideoDataNode *video_data_node;
VideoScaledDataNode *video_scaled_data_node;
AVFrame *src_vframe;
//step 1: try to lock output slot. If none available, return ....
if (video_input_data->circular_buf.size > 1)
dc_consumer_unlock_previous(&video_scaled_data->consumer, &video_input_data->circular_buf);
ret = dc_producer_lock(&video_scaled_data->producer, &video_scaled_data->circular_buf);
//not ready
if (ret<0) {
return -1;
}
dc_producer_unlock_previous(&video_scaled_data->producer, &video_scaled_data->circular_buf);
//step 2: lock input
ret = dc_consumer_lock(&video_scaled_data->consumer, &video_input_data->circular_buf);
if (ret < 0) {
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("Video scaler got an end of input tbuffer!\n"));
return -2;
}
//step 3 - grab source and dest images
video_data_node = (VideoDataNode*)dc_consumer_consume(&video_scaled_data->consumer, &video_input_data->circular_buf);
video_scaled_data_node = (VideoScaledDataNode*)dc_producer_produce(&video_scaled_data->producer, &video_scaled_data->circular_buf);
index = video_data_node->source_number;
video_scaled_data->frame_duration = video_input_data->frame_duration;
//crop if necessary
if (video_input_data->vprop[index].crop_x || video_input_data->vprop[index].crop_y) {
#if 0
av_frame_copy_props(video_scaled_data_node->cropped_frame, video_data_node->vframe);
video_scaled_data_node->cropped_frame->width = video_input_data->vprop[index].width - video_input_data->vprop[index].crop_x;
video_scaled_data_node->cropped_frame->height = video_input_data->vprop[index].height - video_input_data->vprop[index].crop_y;
#endif
if (av_picture_crop((AVPicture*)video_scaled_data_node->cropped_frame, (AVPicture*)video_data_node->vframe, PIX_FMT_YUV420P, video_input_data->vprop[index].crop_y, video_input_data->vprop[index].crop_x) < 0) {
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("Video scaler: error while cropping picture.\n"));
return -1;
}
src_vframe = video_scaled_data_node->cropped_frame;
src_height = video_input_data->vprop[index].height - video_input_data->vprop[index].crop_y;
} else {
assert(!video_scaled_data_node->cropped_frame);
src_vframe = video_data_node->vframe;
src_height = video_input_data->vprop[index].height;
}
//rescale the cropped frame
ret = sws_scale(video_scaled_data->vsprop[index].sws_ctx,
(const uint8_t * const *)src_vframe->data, src_vframe->linesize, 0, src_height,
video_scaled_data_node->v_frame->data, video_scaled_data_node->v_frame->linesize);
if (!ret) {
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("Video scaler: error while resizing picture.\n"));
return -1;
}
video_scaled_data_node->v_frame->pts = video_data_node->vframe->pts;
if (video_data_node->nb_raw_frames_ref) {
if (video_data_node->nb_raw_frames_ref==1) {
#ifndef GPAC_USE_LIBAV
av_frame_unref(video_data_node->vframe);
#endif
av_free_packet(&video_data_node->raw_packet);
}
video_data_node->nb_raw_frames_ref--;
}
dc_consumer_advance(&video_scaled_data->consumer);
dc_producer_advance(&video_scaled_data->producer, &video_scaled_data->circular_buf);
if (video_input_data->circular_buf.size == 1)
dc_consumer_unlock_previous(&video_scaled_data->consumer, &video_input_data->circular_buf);
return 0;
}
int dc_audio_decoder_read(AudioInputFile *audio_input_file, AudioInputData *audio_input_data)
{
int ret;
AVPacket packet;
int got_frame = 0;
AVCodecContext *codec_ctx;
AudioDataNode *audio_data_node;
/* Get a pointer to the codec context for the audio stream */
codec_ctx = audio_input_file->av_fmt_ctx->streams[audio_input_file->astream_idx]->codec;
/* Read frames */
while (1) {
if (audio_input_file->av_pkt_list) {
if (gf_list_count(audio_input_file->av_pkt_list)) {
AVPacket *packet_copy;
assert(audio_input_file->av_pkt_list);
gf_mx_p(audio_input_file->av_pkt_list_mutex);
packet_copy = gf_list_pop_front(audio_input_file->av_pkt_list);
gf_mx_v(audio_input_file->av_pkt_list_mutex);
if (packet_copy == NULL) {
ret = AVERROR_EOF;
} else {
memcpy(&packet, packet_copy, sizeof(AVPacket));
gf_free(packet_copy);
ret = 0;
}
} else {
gf_sleep(1);
continue;
}
} else {
ret = av_read_frame(audio_input_file->av_fmt_ctx, &packet);
}
if (ret == AVERROR_EOF) {
if (audio_input_file->mode == LIVE_MEDIA && audio_input_file->no_loop == 0) {
av_seek_frame(audio_input_file->av_fmt_ctx, audio_input_file->astream_idx, 0, 0);
continue;
}
/* Flush decoder */
packet.data = NULL;
packet.size = 0;
#ifndef FF_API_AVFRAME_LAVC
avcodec_get_frame_defaults(audio_input_data->aframe);
#else
av_frame_unref(audio_input_data->aframe);
#endif
avcodec_decode_audio4(codec_ctx, audio_input_data->aframe, &got_frame, &packet);
if (got_frame) {
dc_producer_lock(&audio_input_data->producer, &audio_input_data->circular_buf);
dc_producer_unlock_previous(&audio_input_data->producer, &audio_input_data->circular_buf);
audio_data_node = (AudioDataNode*)dc_producer_produce(&audio_input_data->producer, &audio_input_data->circular_buf);
audio_data_node->abuf_size = audio_input_data->aframe->linesize[0];
memcpy(audio_data_node->abuf, audio_input_data->aframe->data[0], audio_data_node->abuf_size);
dc_producer_advance(&audio_input_data->producer, &audio_input_data->circular_buf);
return 0;
}
dc_producer_end_signal(&audio_input_data->producer, &audio_input_data->circular_buf);
dc_producer_unlock_previous(&audio_input_data->producer, &audio_input_data->circular_buf);
return -2;
}
else if (ret < 0)
{
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("Cannot read audio frame.\n"));
continue;
}
/* Is this a packet from the audio stream? */
if (packet.stream_index == audio_input_file->astream_idx) {
/* Set audio frame to default */
#ifndef FF_API_AVFRAME_LAVC
avcodec_get_frame_defaults(audio_input_data->aframe);
#else
av_frame_unref(audio_input_data->aframe);
#endif
/* Decode audio frame */
if (avcodec_decode_audio4(codec_ctx, audio_input_data->aframe, &got_frame, &packet) < 0) {
av_free_packet(&packet);
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("Error while decoding audio.\n"));
dc_producer_end_signal(&audio_input_data->producer, &audio_input_data->circular_buf);
dc_producer_unlock_previous(&audio_input_data->producer, &audio_input_data->circular_buf);
return -1;
}
if (audio_input_data->aframe->pts != AV_NOPTS_VALUE)
audio_input_data->next_pts = audio_input_data->aframe->pts;
audio_input_data->next_pts += ((int64_t)AV_TIME_BASE * audio_input_data->aframe->nb_samples) / codec_ctx->sample_rate;
/* Did we get an audio frame? */
if (got_frame) {
uint8_t **data;
int data_size;
#ifdef DC_AUDIO_RESAMPLER
int num_planes_out;
#endif
#ifdef GPAC_USE_LIBAV
int sample_rate = codec_ctx->sample_rate;
int num_channels = codec_ctx->channels;
u64 channel_layout = codec_ctx->channel_layout;
#else
int sample_rate = audio_input_data->aframe->sample_rate;
int num_channels = audio_input_data->aframe->channels;
u64 channel_layout = audio_input_data->aframe->channel_layout;
#endif
enum AVSampleFormat sample_format = (enum AVSampleFormat)audio_input_data->aframe->format;
Bool resample = (sample_rate != DC_AUDIO_SAMPLE_RATE
|| num_channels != DC_AUDIO_NUM_CHANNELS
|| channel_layout != DC_AUDIO_CHANNEL_LAYOUT
|| sample_format != DC_AUDIO_SAMPLE_FORMAT);
/* Resample if needed */
if (resample) {
#ifndef DC_AUDIO_RESAMPLER
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("Audio resampling is needed at the decoding stage, but not supported by your version of DashCast. Aborting.\n"));
exit(1);
#else
uint8_t **output;
if (ensure_resampler(audio_input_file, sample_rate, num_channels, channel_layout, sample_format)) {
return -1;
}
if (resample_audio(audio_input_file, audio_input_data, codec_ctx, &output, &num_planes_out, num_channels, sample_format)) {
return -1;
} else {
data = output;
av_samples_get_buffer_size(&data_size, num_channels, audio_input_data->aframe->nb_samples, sample_format, 0);
}
#endif
} else {
/*no resampling needed: read data from the AVFrame*/
data = audio_input_data->aframe->extended_data;
data_size = audio_input_data->aframe->linesize[0];
}
assert(!av_sample_fmt_is_planar(DC_AUDIO_SAMPLE_FORMAT));
av_fifo_generic_write(audio_input_file->fifo, data[0], data_size, NULL);
if (/*audio_input_file->circular_buf.mode == OFFLINE*/audio_input_file->mode == ON_DEMAND || audio_input_file->mode == LIVE_MEDIA) {
dc_producer_lock(&audio_input_data->producer, &audio_input_data->circular_buf);
/* Unlock the previous node in the circular buffer. */
dc_producer_unlock_previous(&audio_input_data->producer, &audio_input_data->circular_buf);
/* Get the pointer of the current node in circular buffer. */
audio_data_node = (AudioDataNode *) dc_producer_produce(&audio_input_data->producer, &audio_input_data->circular_buf);
audio_data_node->channels = DC_AUDIO_NUM_CHANNELS;
audio_data_node->channel_layout = DC_AUDIO_CHANNEL_LAYOUT;
audio_data_node->sample_rate = DC_AUDIO_SAMPLE_RATE;
audio_data_node->format = DC_AUDIO_SAMPLE_FORMAT;
audio_data_node->abuf_size = data_size;
av_fifo_generic_read(audio_input_file->fifo, audio_data_node->abuf, audio_data_node->abuf_size, NULL);
dc_producer_advance(&audio_input_data->producer, &audio_input_data->circular_buf);
} else {
while (av_fifo_size(audio_input_file->fifo) >= LIVE_FRAME_SIZE) {
/* Lock the current node in the circular buffer. */
if (dc_producer_lock(&audio_input_data->producer, &audio_input_data->circular_buf) < 0) {
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("[dashcast] Live system dropped an audio frame\n"));
continue;
}
/* Unlock the previous node in the circular buffer. */
dc_producer_unlock_previous(&audio_input_data->producer, &audio_input_data->circular_buf);
/* Get the pointer of the current node in circular buffer. */
audio_data_node = (AudioDataNode *) dc_producer_produce(&audio_input_data->producer, &audio_input_data->circular_buf);
audio_data_node->abuf_size = LIVE_FRAME_SIZE;
av_fifo_generic_read(audio_input_file->fifo, audio_data_node->abuf, audio_data_node->abuf_size, NULL);
dc_producer_advance(&audio_input_data->producer, &audio_input_data->circular_buf);
}
}
#ifdef DC_AUDIO_RESAMPLER
if (resample) {
int i;
for (i=0; i<num_planes_out; ++i) {
av_free(data[i]);
}
av_free(data);
}
#endif
return 0;
}
}
/*
* Free the packet that was allocated by av_read_frame
*/
av_free_packet(&packet);
}
GF_LOG(GF_LOG_ERROR, GF_LOG_DASH, ("Unknown error while reading audio frame.\n"));
return -1;
}
