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avformat/avformat: Constify AVFormatContext.*_codec pointers

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This also allows to exclusively use pointers to const AVCodec in
fftools/ffmpeg_opt.c.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2021-02-25 05:32:20 +01:00 • committed by James Almer
parent 420cedd497
commit 14fa0a4efb
3 changed files with 9 additions and 6 deletions
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3
doc/APIchanges
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@ -14,6 +14,9 @@ libavutil: 2017-10-21
API changes, most recent first:
2021-04-27 - xxxxxxxxxx - lavf yyyyyyyyy - avformat.h
Constified AVFormatContext.*_codec.
2021-04-27 - xxxxxxxxxx - lavf yyyyyyyyy - avformat.h
Constified the pointers to AVInputFormats and AVOutputFormats
in AVFormatContext, avformat_alloc_output_context2(),

4
fftools/ffmpeg_opt.c
View file

@ -737,11 +737,11 @@ static int opt_recording_timestamp(void *optctx, const char *opt, const char *ar
return 0;
}
static AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
static const AVCodec *find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
{
const AVCodecDescriptor *desc;
const char *codec_string = encoder ? "encoder" : "decoder";
AVCodec *codec;
const AVCodec *codec;
codec = encoder ?
avcodec_find_encoder_by_name(name) :

8
libavformat/avformat.h
View file

@ -1598,7 +1598,7 @@ typedef struct AVFormatContext {
* the same codec_id.
* Demuxing: Set by user
*/
AVCodec *video_codec;
const AVCodec *video_codec;
/**
* Forced audio codec.
@ -1606,7 +1606,7 @@ typedef struct AVFormatContext {
* the same codec_id.
* Demuxing: Set by user
*/
AVCodec *audio_codec;
const AVCodec *audio_codec;
/**
* Forced subtitle codec.
@ -1614,7 +1614,7 @@ typedef struct AVFormatContext {
* the same codec_id.
* Demuxing: Set by user
*/
AVCodec *subtitle_codec;
const AVCodec *subtitle_codec;
/**
* Forced data codec.
@ -1622,7 +1622,7 @@ typedef struct AVFormatContext {
* the same codec_id.
* Demuxing: Set by user
*/
AVCodec *data_codec;
const AVCodec *data_codec;
/**
* Number of bytes to be written as padding in a metadata header.