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lavf: export id3v2 attached pictures as streams.

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This commit is contained in:
Anton Khirnov 2012-02-25 09:53:35 +01:00
parent dd2a4bcfd7
commit 079ea6ca5f
3 changed files with 48 additions and 1 deletions
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34
libavformat/id3v2.c
View File

@ -702,3 +702,37 @@ void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
current = next; current = next;
} }
} }
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
{
ID3v2ExtraMeta *cur;
for (cur = *extra_meta; cur; cur = cur->next) {
ID3v2ExtraMetaAPIC *apic;
AVStream *st;
if (strcmp(cur->tag, "APIC"))
continue;
apic = cur->data;
if (!(st = avformat_new_stream(s, NULL)))
return AVERROR(ENOMEM);
st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = apic->id;
av_dict_set(&st->metadata, "title", apic->description, 0);
av_dict_set(&st->metadata, "comment", apic->type, 0);
av_init_packet(&st->attached_pic);
st->attached_pic.data = apic->data;
st->attached_pic.size = apic->len;
st->attached_pic.destruct = av_destruct_packet;
st->attached_pic.stream_index = st->index;
apic->data = NULL;
apic->len = 0;
}
return 0;
}

6
libavformat/id3v2.h
View File

@ -109,6 +109,12 @@ int ff_id3v2_write(struct AVFormatContext *s, int id3v2_version, const char *mag
*/ */
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta); void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta);
/**
* Create a stream for each APIC (attached picture) extracted from the
* ID3v2 header.
*/
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta);
extern const AVMetadataConv ff_id3v2_34_metadata_conv[]; extern const AVMetadataConv ff_id3v2_34_metadata_conv[];
extern const AVMetadataConv ff_id3v2_4_metadata_conv[]; extern const AVMetadataConv ff_id3v2_4_metadata_conv[];

9
libavformat/utils.c
View File

@ -520,6 +520,7 @@ int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputForma
AVFormatContext *s = *ps; AVFormatContext *s = *ps;
int i, ret = 0; int i, ret = 0;
AVDictionary *tmp = NULL; AVDictionary *tmp = NULL;
ID3v2ExtraMeta *id3v2_extra_meta = NULL;
if (!s && !(s = avformat_alloc_context())) if (!s && !(s = avformat_alloc_context()))
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
@ -562,12 +563,17 @@ int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputForma
/* e.g. AVFMT_NOFILE formats will not have a AVIOContext */ /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
if (s->pb) if (s->pb)
ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC); ff_id3v2_read_all(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
if (s->iformat->read_header) if (s->iformat->read_header)
if ((ret = s->iformat->read_header(s)) < 0) if ((ret = s->iformat->read_header(s)) < 0)
goto fail; goto fail;
if (id3v2_extra_meta &&
(ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
goto fail;
ff_id3v2_free_extra_meta(&id3v2_extra_meta);
/* queue attached pictures */ /* queue attached pictures */
for (i = 0; i < s->nb_streams; i++) for (i = 0; i < s->nb_streams; i++)
if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC) { if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC) {
@ -589,6 +595,7 @@ int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputForma
return 0; return 0;
fail: fail:
ff_id3v2_free_extra_meta(&id3v2_extra_meta);
av_dict_free(&tmp); av_dict_free(&tmp);
if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO)) if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
avio_close(s->pb); avio_close(s->pb);