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lavc: add an option to enable side data-only packets during encoding 

Some encoders (e.g. flac) need to send side data when there is no more
data to be output. This enables them to output a packet with no data in
it, only side data.
This commit is contained in:
Anton Khirnov 2014-04-29 15:06:45 +02:00
parent eb800f120d
commit 0957b274e3
4 changed files with 22 additions and 1 deletions
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5
doc/APIchanges
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@ -13,6 +13,11 @@ libavutil: 2013-12-xx
API changes, most recent first:
2014-04-xx - xxxxxxx - lavc 55.54.0 - avcodec.h
Add AVCodecContext.side_data_only_packets to allow encoders to output packets
with only side data. This option may become mandatory in the future, so all
users are recommended to update their code and enable this option.
2014-xx-xx - xxxxxxx - lavu 53.16.0 - frame.h, pixfmt.h
Move all color-related enums (AVColorPrimaries, AVColorSpace, AVColorRange,
AVColorTransferCharacteristic, and AVChromaLocation) inside lavu.

15
libavcodec/avcodec.h
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@ -2730,6 +2730,21 @@ typedef struct AVCodecContext {
* - decoding: unused.
*/
uint64_t vbv_delay;
/**
* Encoding only. Allow encoders to output packets that do not contain any
* encoded data, only side data.
*
* Some encoders need to output such packets, e.g. to update some stream
* parameters at the end of encoding.
*
* All callers are strongly recommended to set this option to 1 and update
* their code to deal with such packets, since this behaviour may become
* always enabled in the future (then this option will be deprecated and
* later removed). To avoid ABI issues when this happens, the callers should
* use AVOptions to set this field.
*/
int side_data_only_packets;
} AVCodecContext;
/**

1
libavcodec/options_table.h
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@ -399,6 +399,7 @@ static const AVOption avcodec_options[] = {
{"fltp", "32-bit float planar", 0, AV_OPT_TYPE_CONST, {.i64 = AV_SAMPLE_FMT_FLTP }, INT_MIN, INT_MAX, A|D, "request_sample_fmt"},
{"dblp", "64-bit double planar", 0, AV_OPT_TYPE_CONST, {.i64 = AV_SAMPLE_FMT_DBLP }, INT_MIN, INT_MAX, A|D, "request_sample_fmt"},
{"refcounted_frames", NULL, OFFSET(refcounted_frames), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, A|V|D },
{"side_data_only_packets", NULL, OFFSET(side_data_only_packets), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, A|V|E },
{NULL},
};

2
libavcodec/version.h
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@ -29,7 +29,7 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 55
#define LIBAVCODEC_VERSION_MINOR 53
#define LIBAVCODEC_VERSION_MINOR 54
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \