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Code Issues Releases Activity

avformat: add av_format_inject_global_side_data(), and disable it by default

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After this commit applications needs to call av_format_inject_global_side_data()
or handle AVStream side data by some other means if they want it not to be lost.

This fixes a API incompatibility with libav.
libav API does not allow the data to be passed through AVPackets

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-04-13 19:20:17 +02:00
parent 2adcd15f2e
commit ef818d8bf0
5 changed files with 32 additions and 4 deletions
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3
doc/APIchanges
View File

@ -15,6 +15,9 @@ libavutil: 2012-10-22
API changes, most recent first:
2014-04-XX - xxxxxxx - lavf xx.xx.1xx - avformat.h
Add av_format_inject_global_side_data()
2014-04-12 - xxxxxxx - lavu 52.76.100 - log.h
Add av_log_get_flags()

2
ffplay.c
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@ -2752,6 +2752,8 @@ static int read_thread(void *arg)
if (genpts)
ic->flags |= AVFMT_FLAG_GENPTS;
av_format_inject_global_side_data(ic);
opts = setup_find_stream_info_opts(ic, codec_opts);
orig_nb_streams = ic->nb_streams;

10
libavformat/avformat.h
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@ -862,6 +862,8 @@ typedef struct AVStream {
* - muxing: May be set by the caller before avformat_write_header().
*
* Freed by libavformat in avformat_free_context().
*
* @see av_format_inject_global_side_data()
*/
AVPacketSideData *side_data;
/**
@ -1043,7 +1045,7 @@ typedef struct AVStream {
/**
* Internal data to inject global side data
*/
int global_side_data_injected;
int inject_global_side_data;
} AVStream;
@ -1612,6 +1614,12 @@ void av_format_set_opaque(AVFormatContext *s, void *opaque);
av_format_control_message av_format_get_control_message_cb(const AVFormatContext *s);
void av_format_set_control_message_cb(AVFormatContext *s, av_format_control_message callback);
/**
* This function will cause global side data to be injected in the next packet
* of each stream as well as after any subsequent seek.
*/
void av_format_inject_global_side_data(AVFormatContext *s);
/**
* Returns the method used to set ctx->duration.
*

2
libavformat/internal.h
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@ -52,6 +52,8 @@ struct AVFormatInternal {
* Muxing only.
*/
int nb_interleaved_streams;
int inject_global_side_data;
};
#ifdef __GNUC__

19
libavformat/utils.c
View File

@ -110,6 +110,16 @@ MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding)
MAKE_ACCESSORS(AVFormatContext, format, void *, opaque)
MAKE_ACCESSORS(AVFormatContext, format, av_format_control_message, control_message_cb)
void av_format_inject_global_side_data(AVFormatContext *s)
{
int i;
s->internal->inject_global_side_data = 1;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
st->inject_global_side_data = 1;
}
}
static AVCodec *find_decoder(AVFormatContext *s, AVStream *st, enum AVCodecID codec_id)
{
if (st->codec->codec)
@ -1527,7 +1537,7 @@ static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
st->skip_samples = 0;
}
if (!st->global_side_data_injected) {
if (st->inject_global_side_data) {
for (i = 0; i < st->nb_side_data; i++) {
AVPacketSideData *src_sd = &st->side_data[i];
uint8_t *dst_data;
@ -1543,7 +1553,7 @@ static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
memcpy(dst_data, src_sd->data, src_sd->size);
}
st->global_side_data_injected = 1;
st->inject_global_side_data = 0;
}
if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
@ -1717,7 +1727,8 @@ void ff_read_frame_flush(AVFormatContext *s)
for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
st->pts_buffer[j] = AV_NOPTS_VALUE;
st->global_side_data_injected = 0;
if (s->internal->inject_global_side_data)
st->inject_global_side_data = 1;
}
}
@ -3690,6 +3701,8 @@ AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
st->info->fps_first_dts = AV_NOPTS_VALUE;
st->info->fps_last_dts = AV_NOPTS_VALUE;
st->inject_global_side_data = s->internal->inject_global_side_data;
s->streams[s->nb_streams++] = st;
return st;
}