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lavf: add a convenience function for adding side data to a stream

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This commit is contained in:
Anton Khirnov 2014-11-14 12:45:08 +01:00
parent 728685f37a
commit 4227e4fe74
3 changed files with 47 additions and 22 deletions
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7
libavformat/internal.h
View File

@ -366,4 +366,11 @@ static inline int ff_rename(const char *oldpath, const char *newpath)
return 0;
}
/**
* Add new side data to a stream. If a side data of this type already exists, it
* is replaced.
*/
uint8_t *ff_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
int size);
#endif /* AVFORMAT_INTERNAL_H */

25
libavformat/replaygain.c
View File

@ -33,6 +33,7 @@
#include "libavutil/replaygain.h"
#include "avformat.h"
#include "internal.h"
#include "replaygain.h"
static int32_t parse_value(const char *value, int32_t min)
@ -69,36 +70,16 @@ static int32_t parse_value(const char *value, int32_t min)
int ff_replaygain_export_raw(AVStream *st, int32_t tg, uint32_t tp,
int32_t ag, uint32_t ap)
{
AVPacketSideData *sd, *tmp;
AVReplayGain *replaygain;
if (tg == INT32_MIN && ag == INT32_MIN)
return 0;
for (int i = 0; i < st->nb_side_data; i++) {
AVPacketSideData *src_sd = &st->side_data[i];
if (src_sd->type == AV_PKT_DATA_REPLAYGAIN)
return 0;
}
replaygain = av_mallocz(sizeof(*replaygain));
replaygain = (AVReplayGain*)ff_stream_new_side_data(st, AV_PKT_DATA_REPLAYGAIN,
sizeof(*replaygain));
if (!replaygain)
return AVERROR(ENOMEM);
tmp = av_realloc_array(st->side_data, st->nb_side_data + 1, sizeof(*tmp));
if (!tmp) {
av_freep(&replaygain);
return AVERROR(ENOMEM);
}
st->side_data = tmp;
st->nb_side_data++;
sd = &st->side_data[st->nb_side_data - 1];
sd->type = AV_PKT_DATA_REPLAYGAIN;
sd->data = (uint8_t*)replaygain;
sd->size = sizeof(*replaygain);
replaygain->track_gain = tg;
replaygain->track_peak = tp;
replaygain->album_gain = ag;

37
libavformat/utils.c
View File

@ -3113,3 +3113,40 @@ uint8_t *av_stream_get_side_data(AVStream *st, enum AVPacketSideDataType type,
}
return NULL;
}
uint8_t *ff_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
int size)
{
AVPacketSideData *sd, *tmp;
int i;
uint8_t *data = av_malloc(size);
if (!data)
return NULL;
for (i = 0; i < st->nb_side_data; i++) {
sd = &st->side_data[i];
if (sd->type == type) {
av_freep(&sd->data);
sd->data = data;
sd->size = size;
return sd->data;
}
}
tmp = av_realloc_array(st->side_data, st->nb_side_data + 1, sizeof(*tmp));
if (!tmp) {
av_freep(&data);
return NULL;
}
st->side_data = tmp;
st->nb_side_data++;
sd = &st->side_data[st->nb_side_data - 1];
sd->type = type;
sd->data = data;
sd->size = size;
return data;
}