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lavf: add avformat_write_header() as a replacement for av_write_header().

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It supports more convenient setting of AVOptions.
This commit is contained in:
Anton Khirnov 2011-05-22 13:53:33 +02:00
parent 603b8bc2a1
commit 25de5958c8
3 changed files with 80 additions and 15 deletions
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30
libavformat/avformat.h
View File

@ -1322,7 +1322,12 @@ int64_t av_gen_search(AVFormatContext *s, int stream_index,
/**
* media file output
*/
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
#if FF_API_FORMAT_PARAMETERS
/**
* @deprecated pass the options to avformat_write_header directly.
*/
attribute_deprecated int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
#endif
/**
* Split a URL string into components.
@ -1350,6 +1355,24 @@ void av_url_split(char *proto, int proto_size,
char *path, int path_size,
const char *url);
/**
* Allocate the stream private data and write the stream header to
* an output media file.
*
* @param s Media file handle, must be allocated with avformat_alloc_context().
* Its oformat field must be set to the desired output format;
* Its pb field must be set to an already openened AVIOContext.
* @param options An AVDictionary filled with AVFormatContext and muxer-private options.
* On return this parameter will be destroyed and replaced with a dict containing
* options that were not found. May be NULL.
*
* @return 0 on success, negative AVERROR on failure.
*
* @see av_opt_find, av_dict_set, avio_open, av_oformat_next.
*/
int avformat_write_header(AVFormatContext *s, AVDictionary **options);
#if FF_API_FORMAT_PARAMETERS
/**
* Allocate the stream private data and write the stream header to an
* output media file.
@ -1358,8 +1381,11 @@ void av_url_split(char *proto, int proto_size,
*
* @param s media file handle
* @return 0 if OK, AVERROR_xxx on error
*
* @deprecated use avformat_write_header.
*/
int av_write_header(AVFormatContext *s);
attribute_deprecated int av_write_header(AVFormatContext *s);
#endif
/**
* Write a packet to an output media file.

2
libavformat/rtpenc_chain.c
View File

@ -66,7 +66,7 @@ AVFormatContext *ff_rtp_chain_mux_open(AVFormatContext *s, AVStream *st,
ffio_fdopen(&rtpctx->pb, handle);
} else
ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);
ret = av_write_header(rtpctx);
ret = avformat_write_header(rtpctx, NULL);
if (ret) {
if (handle) {

63
libavformat/utils.c
View File

@ -2733,6 +2733,7 @@ AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int6
/************************************************************/
/* output media file */
#if FF_API_FORMAT_PARAMETERS
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
{
int ret;
@ -2755,6 +2756,7 @@ int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
}
return 0;
}
#endif
static int validate_codec_tag(AVFormatContext *s, AVStream *st)
{
@ -2789,15 +2791,29 @@ static int validate_codec_tag(AVFormatContext *s, AVStream *st)
return 1;
}
#if FF_API_FORMAT_PARAMETERS
int av_write_header(AVFormatContext *s)
{
int ret, i;
return avformat_write_header(s, NULL);
}
#endif
int avformat_write_header(AVFormatContext *s, AVDictionary **options)
{
int ret = 0, i;
AVStream *st;
AVDictionary *tmp = NULL;
if (options)
av_dict_copy(&tmp, *options, 0);
if ((ret = av_opt_set_dict(s, &tmp)) < 0)
goto fail;
// some sanity checks
if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
av_log(s, AV_LOG_ERROR, "no streams\n");
return AVERROR(EINVAL);
ret = AVERROR(EINVAL);
goto fail;
}
for(i=0;i<s->nb_streams;i++) {
@ -2807,7 +2823,8 @@ int av_write_header(AVFormatContext *s)
case AVMEDIA_TYPE_AUDIO:
if(st->codec->sample_rate<=0){
av_log(s, AV_LOG_ERROR, "sample rate not set\n");
return AVERROR(EINVAL);
ret = AVERROR(EINVAL);
goto fail;
}
if(!st->codec->block_align)
st->codec->block_align = st->codec->channels *
@ -2816,15 +2833,18 @@ int av_write_header(AVFormatContext *s)
case AVMEDIA_TYPE_VIDEO:
if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
av_log(s, AV_LOG_ERROR, "time base not set\n");
return AVERROR(EINVAL);
ret = AVERROR(EINVAL);
goto fail;
}
if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
av_log(s, AV_LOG_ERROR, "dimensions not set\n");
return AVERROR(EINVAL);
ret = AVERROR(EINVAL);
goto fail;
}
if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
return AVERROR(EINVAL);
ret = AVERROR(EINVAL);
goto fail;
}
break;
}
@ -2841,7 +2861,8 @@ int av_write_header(AVFormatContext *s)
av_log(s, AV_LOG_ERROR,
"Tag %s/0x%08x incompatible with output codec id '%d'\n",
tagbuf, st->codec->codec_tag, st->codec->codec_id);
return AVERROR_INVALIDDATA;
ret = AVERROR_INVALIDDATA;
goto fail;
}
}else
st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
@ -2854,8 +2875,16 @@ int av_write_header(AVFormatContext *s)
if (!s->priv_data && s->oformat->priv_data_size > 0) {
s->priv_data = av_mallocz(s->oformat->priv_data_size);
if (!s->priv_data)
return AVERROR(ENOMEM);
if (!s->priv_data) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (s->oformat->priv_class) {
*(const AVClass**)s->priv_data= s->oformat->priv_class;
av_opt_set_defaults(s->priv_data);
if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
goto fail;
}
}
/* set muxer identification string */
@ -2866,7 +2895,7 @@ int av_write_header(AVFormatContext *s)
if(s->oformat->write_header){
ret = s->oformat->write_header(s);
if (ret < 0)
return ret;
goto fail;
}
/* init PTS generation */
@ -2885,12 +2914,22 @@ int av_write_header(AVFormatContext *s)
break;
}
if (den != AV_NOPTS_VALUE) {
if (den <= 0)
return AVERROR_INVALIDDATA;
if (den <= 0) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
av_frac_init(&st->pts, 0, 0, den);
}
}
if (options) {
av_dict_free(options);
*options = tmp;
}
return 0;
fail:
av_dict_free(&tmp);
return ret;
}
//FIXME merge with compute_pkt_fields