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Use ASF supports "markers" which are a name and a time stamp to create

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lavf chapters.
Patch by Vladimir Pantelic pan (arobase) nt tu (dash) darmstadt de

Originally committed as revision 22326 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vladimir Pantelic 2010-03-08 13:13:18 +00:00 committed by Benoit Fouet
parent 9b066ecbf0
commit 88b51ea948
3 changed files with 32 additions and 0 deletions
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4
libavformat/asf.c
View File

@ -106,6 +106,10 @@ const ff_asf_guid ff_asf_metadata_header = {
0xea, 0xcb, 0xf8, 0xc5, 0xaf, 0x5b, 0x77, 0x48, 0x84, 0x67, 0xaa, 0x8c, 0x44, 0xfa, 0x4c, 0xca
};
const ff_asf_guid ff_asf_marker_header = {
0x01, 0xCD, 0x87, 0xF4, 0x51, 0xA9, 0xCF, 0x11, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65
};
/* I am not a number !!! This GUID is the one found on the PC used to
generate the stream */
const ff_asf_guid ff_asf_my_guid = {

1
libavformat/asf.h
View File

@ -158,6 +158,7 @@ extern const ff_asf_guid ff_asf_simple_index_header;
extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;
extern const ff_asf_guid ff_asf_ext_stream_audio_stream;
extern const ff_asf_guid ff_asf_metadata_header;
extern const ff_asf_guid ff_asf_marker_header;
extern const ff_asf_guid ff_asf_my_guid;
extern const ff_asf_guid ff_asf_language_guid;
extern const ff_asf_guid ff_asf_content_encryption;

27
libavformat/asfdec.c
View File

@ -82,6 +82,7 @@ static void print_guid(const ff_asf_guid *g)
else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
else PRINT_IF_GUID(g, ff_asf_metadata_header);
else PRINT_IF_GUID(g, ff_asf_marker_header);
else PRINT_IF_GUID(g, stream_bitrate_guid);
else PRINT_IF_GUID(g, ff_asf_language_guid);
else
@ -520,6 +521,32 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
get_guid(pb, &g);
v1 = get_le32(pb);
v2 = get_le16(pb);
} else if (!guidcmp(&g, &ff_asf_marker_header)) {
int i, count, name_len;
char name[1024];
get_le64(pb); // reserved 16 bytes
get_le64(pb); // ...
count = get_le32(pb); // markers count
get_le16(pb); // reserved 2 bytes
name_len = get_le16(pb); // name length
for(i=0;i<name_len;i++){
get_byte(pb); // skip the name
}
for(i=0;i<count;i++){
int64_t pres_time;
int name_len;
get_le64(pb); // offset, 8 bytes
pres_time = get_le64(pb); // presentation time
get_le16(pb); // entry length
get_le32(pb); // send time
get_le32(pb); // flags
name_len = get_le32(pb); // name length
get_str16_nolen(pb, name_len * 2, name, sizeof(name));
ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
}
#if 0
} else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
int len, v1, n, num;