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ffmpeg: only copy bits_per_sample from decoder when it remains valid

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I.e. when the only filters that are applied do not modify the frame
data.
This commit is contained in:
Anton Khirnov
2021-11-23 11:22:57 +01:00
parent 4258893961
commit ab3ef54c8c
3 changed files with 34 additions and 9 deletions
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26
fftools/ffmpeg_filter.c
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@@ -960,6 +960,30 @@ static void cleanup_filtergraph(FilterGraph *fg)
avfilter_graph_free(&fg->graph);
}
static int filter_is_buffersrc(const AVFilterContext *f)
{
return f->nb_inputs == 0 &&
(!strcmp(f->filter->name, "buffersrc") ||
!strcmp(f->filter->name, "abuffersrc"));
}
static int graph_is_meta(AVFilterGraph *graph)
{
for (unsigned i = 0; i < graph->nb_filters; i++) {
const AVFilterContext *f = graph->filters[i];
/* in addition to filters flagged as meta, also
* disregard sinks and buffersources (but not other sources,
* since they introduce data we are not aware of)
*/
if (!((f->filter->flags & AVFILTER_FLAG_METADATA_ONLY) ||
f->nb_outputs == 0 ||
filter_is_buffersrc(f)))
return 0;
}
return 1;
}
int configure_filtergraph(FilterGraph *fg)
{
AVFilterInOut *inputs, *outputs, *cur;
@@ -1060,6 +1084,8 @@ int configure_filtergraph(FilterGraph *fg)
if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
goto fail;
fg->is_meta = graph_is_meta(fg->graph);
/* limit the lists of allowed formats to the ones selected, to
* make sure they stay the same if the filtergraph is reconfigured later */
for (i = 0; i < fg->nb_outputs; i++) {