On Mon, May 6, 2019, 06:42 Paul B Mahol <one...@gmail.com> wrote:
> Signed-off-by: Paul B Mahol <one...@gmail.com>
> ---
> Makes ffplay display correct timestamps when seeking.
> ---
> libavfilter/af_atempo.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/libavfilter/af_atempo.c b/libavfilter/af_atempo.c
> index bfdad7d76b..6a23d59641 100644
> --- a/libavfilter/af_atempo.c
> +++ b/libavfilter/af_atempo.c
> @@ -103,6 +103,9 @@ typedef struct ATempoContext {
> // 1: output sample position
> int64_t position[2];
>
> + // first input timestamp, all other timestamps are offset by this one
> + int64_t start_pts;
> +
> // sample format:
> enum AVSampleFormat format;
>
> @@ -1055,6 +1058,7 @@ static int config_props(AVFilterLink *inlink)
> enum AVSampleFormat format = inlink->format;
> int sample_rate = (int)inlink->sample_rate;
>
> + atempo->start_pts = AV_NOPTS_VALUE;
> return yae_reset(atempo, format, sample_rate, inlink->channels);
> }
>
> @@ -1068,7 +1072,7 @@ static int push_samples(ATempoContext *atempo,
> atempo->dst_buffer->nb_samples = n_out;
>
> // adjust the PTS:
> - atempo->dst_buffer->pts =
> + atempo->dst_buffer->pts = atempo->start_pts +
> av_rescale_q(atempo->nsamples_out,
> (AVRational){ 1, outlink->sample_rate },
> outlink->time_base);
> @@ -1097,6 +1101,8 @@ static int filter_frame(AVFilterLink *inlink,
> AVFrame *src_buffer)
> const uint8_t *src = src_buffer->data[0];
> const uint8_t *src_end = src + n_in * atempo->stride;
>
> + if (atempo->start_pts == AV_NOPTS_VALUE)
> + atempo->start_pts = src_buffer->pts;
> while (src < src_end) {
> if (!atempo->dst_buffer) {
> atempo->dst_buffer = ff_get_audio_buffer(outlink, n_out);
>
Maybe ok. I am not sure how this would interact with seeking, have you
tried that? I can check after work tomorrow, I don't think I can do it
today as I will be out all evening.
Thank you,
Pavel.
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
