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matroska : Add support for reading/writing creation_time metadata.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Aaron Colwell 2012-03-05 19:02:48 +01:00 committed by Michael Niedermayer
parent c7048036db
commit 2e061130f4
2 changed files with 24 additions and 1 deletions
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17
libavformat/matroskadec.c
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@ -235,6 +235,7 @@ typedef struct {
uint64_t time_scale;
double duration;
char *title;
EbmlBin date_utc;
EbmlList tracks;
EbmlList attachments;
EbmlList chapters;
@ -294,7 +295,7 @@ static EbmlSyntax matroska_info[] = {
{ MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
{ MATROSKA_ID_WRITINGAPP, EBML_NONE },
{ MATROSKA_ID_MUXINGAPP, EBML_NONE },
{ MATROSKA_ID_DATEUTC, EBML_NONE },
{ MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext,date_utc) },
{ MATROSKA_ID_SEGMENTUID, EBML_NONE },
{ 0 }
};
@ -1346,6 +1347,17 @@ static int matroska_aac_sri(int samplerate)
return sri;
}
static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
{
char buffer[32];
/* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
time_t creation_time = date_utc / 1000000000 + 978307200;
struct tm *ptm = gmtime(&creation_time);
if (!ptm) return;
strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
av_dict_set(metadata, "creation_time", buffer, 0);
}
static int matroska_read_header(AVFormatContext *s)
{
MatroskaDemuxContext *matroska = s->priv_data;
@ -1406,6 +1418,9 @@ static int matroska_read_header(AVFormatContext *s)
* 1000 / AV_TIME_BASE;
av_dict_set(&s->metadata, "title", matroska->title, 0);
if (matroska->date_utc.size == 8)
matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
tracks = matroska->tracks.elem;
for (i=0; i < matroska->tracks.nb_elem; i++) {
MatroskaTrack *track = &tracks[i];

8
libavformat/matroskaenc.c
View File

@ -940,6 +940,14 @@ static int mkv_write_header(AVFormatContext *s)
put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
}
if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
// Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
uint8_t date_utc_buf[8];
AV_WB64(date_utc_buf, date_utc);
put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
}
// reserve space for the duration
mkv->duration = 0;
mkv->duration_offset = avio_tell(pb);