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authorAurelien Jacobs <aurel@gnuage.org>2008-09-04 23:26:12 +0000
committerAurelien Jacobs <aurel@gnuage.org>2008-09-04 23:26:12 +0000
commit3eb9bfbb84dca701f1f09d3b23fc55eb006869b3 (patch)
tree918cc7f36279d67b04d5d1189dc30085b9db77e3 /libavformat
parentf2abc559453d9d93d5ef56a63f81cc4726854d38 (diff)
downloadffmpeg-3eb9bfbb84dca701f1f09d3b23fc55eb006869b3.tar.gz
matroskadec: fix ASS subtitle track packets before emitting them
Matroska does some butchering when storing the ASS lines. The start and end time are removed (because they are duplicated in the container). The matroska_fix_ass_packet() function simply restore those start and end time in ASS lines to ensure our ASS packets comply with the ASS spec. Originally committed as revision 15211 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat')
-rw-r--r--libavformat/matroskadec.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 437ac3717e..7452ff0599 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -28,6 +28,7 @@
* Specs available on the Matroska project page: http://www.matroska.org/.
*/
+#include <stdio.h>
#include "avformat.h"
/* For codec_get_id(). */
#include "riff.h"
@@ -932,6 +933,37 @@ static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
return -1;
}
+static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
+ AVPacket *pkt)
+{
+ char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
+ for (; *ptr!=',' && ptr<end-1; ptr++);
+ if (*ptr == ',')
+ layer = ++ptr;
+ for (; *ptr!=',' && ptr<end-1; ptr++);
+ if (*ptr == ',') {
+ int64_t end_pts = pkt->pts + pkt->convergence_duration;
+ int sc = matroska->time_scale * pkt->pts / 10000000;
+ int ec = matroska->time_scale * end_pts / 10000000;
+ int sh, sm, ss, eh, em, es, len;
+ sh = sc/360000; sc -= 360000*sh;
+ sm = sc/ 6000; sc -= 6000*sm;
+ ss = sc/ 100; sc -= 100*ss;
+ eh = ec/360000; ec -= 360000*eh;
+ em = ec/ 6000; ec -= 6000*em;
+ es = ec/ 100; ec -= 100*es;
+ *ptr++ = '\0';
+ len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
+ if (!(line = av_malloc(len)))
+ return;
+ snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s",
+ layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
+ av_free(pkt->data);
+ pkt->data = line;
+ pkt->size = strlen(line);
+ }
+}
+
static void matroska_convert_tags(AVFormatContext *s, EbmlList *list)
{
MatroskaTag *tags = list->elem;
@@ -1588,6 +1620,9 @@ static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
else
pkt->duration = duration;
+ if (st->codec->codec_id == CODEC_ID_SSA)
+ matroska_fix_ass_packet(matroska, pkt);
+
dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
}