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avviddec: Calculate latency only for fixed framerate

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The framerate was checked correctly in _negotiate, but not in _set_format.

Also fix loss of precision in _negotiate when calculating the framerate.

Fixes #3093

Co-authored-by: Sebastian Dröge <sebastian@centricular.com>
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5818>
This commit is contained in:
Philippe Normand 2023-11-04 10:59:39 +00:00 committed by Tim-Philipp Müller
parent a0558cf8d4
commit c4aba75dc6
1 changed files with 13 additions and 11 deletions
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24
subprojects/gst-libav/ext/libav/gstavviddec.c
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@ -674,16 +674,18 @@ update_state:
* upstream framerate might not be set but we still want to report a latency
* if needed. */
if (ffmpegdec->context->time_base.den && ffmpegdec->context->ticks_per_frame) {
gint fps_n =
ffmpegdec->context->time_base.den / ffmpegdec->context->ticks_per_frame;
gint fps_d = ffmpegdec->context->time_base.num;
latency = gst_util_uint64_scale_ceil (
(ffmpegdec->context->has_b_frames) * GST_SECOND, fps_d, fps_n);
gint fps_n = ffmpegdec->context->time_base.den;
gint fps_d =
ffmpegdec->context->time_base.num * ffmpegdec->context->ticks_per_frame;
if (fps_n) {
latency = gst_util_uint64_scale_ceil (
(ffmpegdec->context->has_b_frames) * GST_SECOND, fps_d, fps_n);
if (ffmpegdec->context->thread_type & FF_THREAD_FRAME) {
latency +=
gst_util_uint64_scale_ceil (ffmpegdec->context->thread_count *
GST_SECOND, fps_d, fps_n);
if (ffmpegdec->context->thread_type & FF_THREAD_FRAME) {
latency +=
gst_util_uint64_scale_ceil (ffmpegdec->context->thread_count *
GST_SECOND, fps_d, fps_n);
}
}
}
@ -1466,8 +1468,8 @@ gst_ffmpegviddec_negotiate (GstFFMpegVidDec * ffmpegdec,
fps_n = in_info->fps_n;
fps_d = in_info->fps_d;
} else {
fps_n = ffmpegdec->ctx_time_d / ffmpegdec->ctx_ticks;
fps_d = ffmpegdec->ctx_time_n;
fps_n = ffmpegdec->ctx_time_d;
fps_d = ffmpegdec->ctx_time_n * ffmpegdec->ctx_ticks;
if (!fps_d) {
GST_LOG_OBJECT (ffmpegdec, "invalid framerate: %d/0, -> %d/1", fps_n,