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avcodec/bsf: add a flushing mechanism to AVBSFContext

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Meant to reset the internal bsf state without the need to reinitialize it.

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2018-07-26 20:32:13 -03:00
parent fe06ed22e6
commit b33f5299a5
4 changed files with 21 additions and 2 deletions
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3
doc/APIchanges
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@ -15,6 +15,9 @@ libavutil: 2017-10-21
API changes, most recent first:
2018-08-16 - xxxxxxxxxx - lavc 58.23.100 - avcodec.h
Add av_bsf_flush().
2018-05-xx - xxxxxxxxxx - lavf 58.15.100 - avformat.h
Add pmt_version field to AVProgram

6
libavcodec/avcodec.h
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@ -5769,6 +5769,7 @@ typedef struct AVBitStreamFilter {
int (*init)(AVBSFContext *ctx);
int (*filter)(AVBSFContext *ctx, AVPacket *pkt);
void (*close)(AVBSFContext *ctx);
void (*flush)(AVBSFContext *ctx);
} AVBitStreamFilter;
#if FF_API_OLD_BSF
@ -5895,6 +5896,11 @@ int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt);
*/
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt);
/**
* Reset the internal bitstream filter state / flush internal buffers.
*/
void av_bsf_flush(AVBSFContext *ctx);
/**
* Free a bitstream filter context and everything associated with it; write NULL
* into the supplied pointer.

10
libavcodec/bsf.c
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@ -172,6 +172,16 @@ int av_bsf_init(AVBSFContext *ctx)
return 0;
}
void av_bsf_flush(AVBSFContext *ctx)
{
ctx->internal->eof = 0;
av_packet_unref(ctx->internal->buffer_pkt);
if (ctx->filter->flush)
ctx->filter->flush(ctx);
}
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
{
int ret;

4
libavcodec/version.h
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@ -28,8 +28,8 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 58
#define LIBAVCODEC_VERSION_MINOR 22
#define LIBAVCODEC_VERSION_MICRO 101
#define LIBAVCODEC_VERSION_MINOR 23
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \