[FFmpeg-cvslog] r14672 - in trunk/libavformat: matroska.h matroskadec.c
aurel
subversion
Sat Aug 9 01:50:39 CEST 2008
Author: aurel
Date: Sat Aug 9 01:50:38 2008
New Revision: 14672
Log:
matroskadec: add basic tags support (metadata)
Modified:
trunk/libavformat/matroska.h
trunk/libavformat/matroskadec.c
Modified: trunk/libavformat/matroska.h
==============================================================================
--- trunk/libavformat/matroska.h (original)
+++ trunk/libavformat/matroska.h Sat Aug 9 01:50:38 2008
@@ -133,7 +133,13 @@
#define MATROSKA_ID_CUECLUSTERPOSITION 0xF1
/* IDs in the tags master */
-/* TODO */
+#define MATROSKA_ID_TAG 0x7373
+#define MATROSKA_ID_SIMPLETAG 0x67C8
+#define MATROSKA_ID_TAGNAME 0x45A3
+#define MATROSKA_ID_TAGSTRING 0x4487
+#define MATROSKA_ID_TAGLANG 0x447A
+#define MATROSKA_ID_TAGDEFAULT 0x44B4
+#define MATROSKA_ID_TAGTARGETS 0x63C0
/* IDs in the seekhead master */
#define MATROSKA_ID_SEEKENTRY 0x4DBB
Modified: trunk/libavformat/matroskadec.c
==============================================================================
--- trunk/libavformat/matroskadec.c (original)
+++ trunk/libavformat/matroskadec.c Sat Aug 9 01:50:38 2008
@@ -164,6 +164,12 @@ typedef struct {
} MatroskaIndex;
typedef struct {
+ char *name;
+ char *string;
+ EbmlList sub;
+} MatroskaTag;
+
+typedef struct {
uint64_t id;
uint64_t pos;
} MatroskaSeekhead;
@@ -188,6 +194,7 @@ typedef struct {
EbmlList attachments;
EbmlList chapters;
EbmlList index;
+ EbmlList tags;
EbmlList seekhead;
/* byte position of the segment inside the stream */
@@ -390,7 +397,25 @@ static EbmlSyntax matroska_index[] = {
{ 0 }
};
+static EbmlSyntax matroska_simpletag[] = {
+ { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
+ { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
+ { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
+ { MATROSKA_ID_TAGLANG, EBML_NONE },
+ { MATROSKA_ID_TAGDEFAULT, EBML_NONE },
+ { EBML_ID_VOID, EBML_NONE },
+ { 0 }
+};
+
+static EbmlSyntax matroska_tag[] = {
+ { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), 0, {.n=matroska_simpletag} },
+ { MATROSKA_ID_TAGTARGETS, EBML_NONE },
+ { EBML_ID_VOID, EBML_NONE },
+ { 0 }
+};
+
static EbmlSyntax matroska_tags[] = {
+ { MATROSKA_ID_TAG, EBML_NEST, 0, offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
{ EBML_ID_VOID, EBML_NONE },
{ 0 }
};
@@ -448,6 +473,25 @@ 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.
*/
@@ -891,6 +935,27 @@ static int matroska_decode_buffer(uint8_
return -1;
}
+static void matroska_convert_tags(AVFormatContext *s, EbmlList *list)
+{
+ MatroskaTag *tags = list->elem;
+ int i, j;
+
+ for (i=0; i < list->nb_elem; i++) {
+ for (j=0; j < ARRAY_SIZE(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 (tags[i].sub.nb_elem)
+ matroska_convert_tags(s, &tags[i].sub);
+ }
+}
+
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
{
EbmlList *seekhead_list = &matroska->seekhead;
@@ -1002,6 +1067,7 @@ static int matroska_read_header(AVFormat
if (matroska->title)
strncpy(matroska->ctx->title, matroska->title,
sizeof(matroska->ctx->title)-1);
+ matroska_convert_tags(s, &matroska->tags);
tracks = matroska->tracks.elem;
for (i=0; i < matroska->tracks.nb_elem; i++) {
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