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matroskadec: add generic metadata support 

Originally committed as revision 17331 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2009-02-15 15:53:55 +00:00
parent 325ace3efc
commit 929e9de7a1
1 changed files with 69 additions and 36 deletions
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105
libavformat/matroskadec.c
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@ -150,6 +150,8 @@ typedef struct {
char *filename;
char *mime;
EbmlBin bin;
AVStream *stream;
} MatroskaAttachement;
typedef struct {
@ -177,6 +179,19 @@ typedef struct {
EbmlList sub;
} MatroskaTag;
typedef struct {
char *type;
uint64_t typevalue;
uint64_t trackuid;
uint64_t chapteruid;
uint64_t attachuid;
} MatroskaTagTarget;
typedef struct {
MatroskaTagTarget target;
EbmlList tag;
} MatroskaTags;
typedef struct {
uint64_t id;
uint64_t pos;
@ -409,14 +424,23 @@ static EbmlSyntax matroska_simpletag[] = {
{ 0 }
};
static EbmlSyntax matroska_tagtargets[] = {
{ MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
{ MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
{ MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
{ MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
{ MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
{ 0 }
};
static EbmlSyntax matroska_tag[] = {
{ MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), 0, {.n=matroska_simpletag} },
{ MATROSKA_ID_TAGTARGETS, EBML_NONE },
{ MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
{ MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
{ 0 }
};
static EbmlSyntax matroska_tags[] = {
{ MATROSKA_ID_TAG, EBML_NEST, 0, offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
{ MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
{ 0 }
};
@ -474,25 +498,6 @@ static EbmlSyntax matroska_clusters[] = {
{ 0 }
};
#define SIZE_OFF(x) sizeof(((AVFormatContext*)0)->x),offsetof(AVFormatContext,x)
const struct {
const char name[16];
int size;
int offset;
} metadata[] = {
{ "TITLE", SIZE_OFF(title) },
{ "ARTIST", SIZE_OFF(author) },
{ "WRITTEN_BY", SIZE_OFF(author) },
{ "LEAD_PERFORMER", SIZE_OFF(author) },
{ "COPYRIGHT", SIZE_OFF(copyright) },
{ "COMMENT", SIZE_OFF(comment) },
{ "ALBUM", SIZE_OFF(album) },
{ "DATE_WRITTEN", SIZE_OFF(year) },
{ "DATE_RELEASED", SIZE_OFF(year) },
{ "PART_NUMBER", SIZE_OFF(track) },
{ "GENRE", SIZE_OFF(genre) },
};
/*
* Return: Whether we reached the end of a level in the hierarchy or not.
*/
@ -977,24 +982,50 @@ static void matroska_merge_packets(AVPacket *out, AVPacket *in)
av_free(in);
}
static void matroska_convert_tags(AVFormatContext *s, EbmlList *list)
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
AVMetadata **metadata, char *prefix)
{
MatroskaTag *tags = list->elem;
int i, j;
char key[1024];
int i;
for (i=0; i < list->nb_elem; i++) {
for (j=0; j < FF_ARRAY_ELEMS(metadata); j++){
if (!strcmp(tags[i].name, metadata[j].name)) {
int *ptr = (int *)((char *)s + metadata[j].offset);
if (*ptr) continue;
if (metadata[j].size > sizeof(int))
av_strlcpy((char *)ptr, tags[i].string, metadata[j].size);
else
*ptr = atoi(tags[i].string);
}
}
if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
else av_strlcpy(key, tags[i].name, sizeof(key));
av_metadata_set(metadata, key, tags[i].string);
if (tags[i].sub.nb_elem)
matroska_convert_tags(s, &tags[i].sub);
matroska_convert_tag(s, &tags[i].sub, metadata, key);
}
}
static void matroska_convert_tags(AVFormatContext *s)
{
MatroskaDemuxContext *matroska = s->priv_data;
MatroskaTags *tags = matroska->tags.elem;
int i, j;
for (i=0; i < matroska->tags.nb_elem; i++) {
if (tags[i].target.attachuid) {
MatroskaAttachement *attachment = matroska->attachments.elem;
for (j=0; j<matroska->attachments.nb_elem; j++)
if (attachment[j].uid == tags[i].target.attachuid)
matroska_convert_tag(s, &tags[i].tag,
&attachment[j].stream->metadata, NULL);
} else if (tags[i].target.chapteruid) {
MatroskaChapter *chapter = matroska->chapters.elem;
for (j=0; j<matroska->chapters.nb_elem; j++)
if (chapter[j].uid == tags[i].target.chapteruid)
matroska_convert_tag(s, &tags[i].tag,
&chapter[j].chapter->metadata, NULL);
} else if (tags[i].target.trackuid) {
MatroskaTrack *track = matroska->tracks.elem;
for (j=0; j<matroska->tracks.nb_elem; j++)
if (track[j].uid == tags[i].target.trackuid)
matroska_convert_tag(s, &tags[i].tag,
&track[j].stream->metadata, NULL);
} else {
matroska_convert_tag(s, &tags[i].tag, &s->metadata, NULL);
}
}
}
@ -1109,7 +1140,6 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
matroska->ctx->duration = matroska->duration * matroska->time_scale
* 1000 / AV_TIME_BASE;
av_metadata_set(&s->metadata, "title", matroska->title);
matroska_convert_tags(s, &matroska->tags);
tracks = matroska->tracks.elem;
for (i=0; i < matroska->tracks.nb_elem; i++) {
@ -1366,6 +1396,7 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
break;
}
}
attachements[j].stream = st;
}
}
@ -1403,6 +1434,8 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
}
}
matroska_convert_tags(s);
return 0;
}