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avfilter/avfilter: add AVFilterGraph->max_buffered_frames to limit buffered frames

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Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint
2025-07-06 10:14:34 +02:00
parent 71468e85ae
commit b24155cae1
4 changed files with 17 additions and 2 deletions
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3
doc/APIchanges
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@ -2,6 +2,9 @@ The last version increases of all libraries were on 2025-03-28
API changes, most recent first:
2025-07-xx - xxxxxxxxxd - lavfi 11.2.100 - avfilter.h
Add AVFilterGraph->max_buffered_frames.
2025-07-07 - eca477da52 - lavc 62.6.100 - packet.h
Add AV_PKT_DATA_RTCP_SR.

8
libavfilter/avfilter.h
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@ -629,6 +629,14 @@ typedef struct AVFilterGraph {
avfilter_execute_func *execute;
char *aresample_swr_opts; ///< swr options to use for the auto-inserted aresample filters, Access ONLY through AVOptions
/**
* Sets the maximum number of buffered frames in the filtergraph combined.
*
* Zero means no limit. This field must be set before calling
* avfilter_graph_config().
*/
unsigned max_buffered_frames;
} AVFilterGraph;
/**

4
libavfilter/avfiltergraph.c
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@ -56,6 +56,8 @@ static const AVOption filtergraph_options[] = {
AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|V },
{"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) ,
AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|A },
{"max_buffered_frames" , "maximum number of buffered frames allowed", OFFSET(max_buffered_frames),
AV_OPT_TYPE_UINT, {.i64 = 0}, 0, UINT_MAX, F|V|A },
{ NULL },
};
@ -1296,6 +1298,8 @@ int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
{
int ret;
if (graphctx->max_buffered_frames)
fffiltergraph(graphctx)->frame_queues.max_queued = graphctx->max_buffered_frames;
if ((ret = graph_check_validity(graphctx, log_ctx)))
return ret;
if ((ret = graph_config_formats(graphctx, log_ctx)))

4
libavfilter/version.h
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@ -31,8 +31,8 @@
#include "version_major.h"
#define LIBAVFILTER_VERSION_MINOR 1
#define LIBAVFILTER_VERSION_MICRO 101
#define LIBAVFILTER_VERSION_MINOR 2
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \