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ffplay: estimate audio frame pts from the previous frame pts values

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Previously we estimated the audio packet pts instead of the frame pts,
therefore it only worked within a single packet (containing multiple frames).

The new method works accross seperate audio packets as well and also handles
better the case if a decoder buffers several packets before outputting a
decoded frame.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2013-07-13 02:50:24 +02:00
parent 782e06e292
commit b383498ea8
1 changed files with 9 additions and 2 deletions
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11
ffplay.c
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@ -216,6 +216,7 @@ typedef struct VideoState {
int frame_drops_early;
int frame_drops_late;
AVFrame *frame;
int64_t audio_frame_next_pts;
enum ShowMode {
SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB
@ -2158,6 +2159,8 @@ static int audio_decode_frame(VideoState *is)
break;
}
pkt_temp->dts =
pkt_temp->pts = AV_NOPTS_VALUE;
pkt_temp->data += len1;
pkt_temp->size -= len1;
if (pkt_temp->data && pkt_temp->size <= 0 || !pkt_temp->data && !got_frame)
@ -2171,8 +2174,11 @@ static int audio_decode_frame(VideoState *is)
is->frame->pts = av_rescale_q(is->frame->pts, dec->time_base, tb);
else if (is->frame->pkt_pts != AV_NOPTS_VALUE)
is->frame->pts = av_rescale_q(is->frame->pkt_pts, is->audio_st->time_base, tb);
if (pkt_temp->pts != AV_NOPTS_VALUE)
pkt_temp->pts += (double) is->frame->nb_samples / is->frame->sample_rate / av_q2d(is->audio_st->time_base);
else if (is->audio_frame_next_pts != AV_NOPTS_VALUE)
is->frame->pts = av_rescale_q(is->audio_frame_next_pts, (AVRational){1, is->audio_filter_src.freq}, tb);
if (is->frame->pts != AV_NOPTS_VALUE)
is->audio_frame_next_pts = is->frame->pts + is->frame->nb_samples;
#if CONFIG_AVFILTER
dec_channel_layout = get_valid_channel_layout(is->frame->channel_layout, av_frame_get_channels(is->frame));
@ -2326,6 +2332,7 @@ static int audio_decode_frame(VideoState *is)
if (pkt->data == flush_pkt.data) {
avcodec_flush_buffers(dec);
is->audio_buf_frames_pending = 0;
is->audio_frame_next_pts = AV_NOPTS_VALUE;
}
*pkt_temp = *pkt;