wtv: parse MPEG2 descriptor events

Originally committed as revision 26126 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 38 insertions, 28 deletions

diff --git a/libavformat/wtv.c b/libavformat/wtv.c
index 474179df98..a29ef8e45d 100644
--- a/libavformat/wtv.c
+++ b/libavformat/wtv.c
@@ -29,6 +29,7 @@
 #include "avformat.h"
 #include "riff.h"
 #include "asf.h"
+#include "mpegts.h"
 
 /* Macros for formating GUIDs */
 #define PRI_GUID \
@@ -78,6 +79,16 @@ static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
     {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
 static const ff_asf_guid EVENTID_LanguageSpanningEvent =
     {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
+static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
+    {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E};
+static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
+    {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
+static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
+    {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
+static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
+    {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
+static const ff_asf_guid EVENTID_TeletextSpanningEvent =
+    {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3};
 
 /* Windows media GUIDs */
 
@@ -307,19 +318,6 @@ static AVStream * parse_media_type(AVFormatContext *s, int sid,
     return NULL;
 }
 
-/**
- * Read three byte language code
- */
-static void get_language(ByteIOContext *pb, AVStream *st)
-{
-    uint8_t language[4];
-    get_buffer(pb, language, 3);
-    if (language[0]) {
-        language[3] = 0;
-        av_metadata_set2(&st->metadata, "language", language, 0);
-    }
-}
-
 enum {
     SEEK_TO_DATA = 0,
     SEEK_TO_BYTE,
@@ -370,27 +368,43 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
                     consumed += 72 + size;
                 }
             }
-        } else if (!ff_guidcmp(g, EVENTID_SubtitleSpanningEvent)) {
+        } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
+                   !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
+                   !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
+                   !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
+                   !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
+                   !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
             int stream_index = ff_find_stream_index(s, sid);
             if (stream_index >= 0) {
                 AVStream *st = s->streams[stream_index];
+                uint8_t buf[258];
+                const uint8_t *pbuf = buf;
+                int buf_size;
+
+                url_fskip(pb, 8);
+                consumed += 8;
+                if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
+                    !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
+                    url_fskip(pb, 6);
+                    consumed += 6;
+                }
 
-                url_fskip(pb, 10);
-                get_language(pb, st);
-                url_fskip(pb, 1);
-
-                st->codec->extradata = av_malloc(4);
-                if (!st->codec->extradata)
-                    return AVERROR(ENOMEM);
-                st->codec->extradata_size = get_buffer(pb, st->codec->extradata, 4);
-                consumed += 18;
+                buf_size = FFMIN(len - consumed, sizeof(buf));
+                get_buffer(pb, buf, buf_size);
+                consumed += buf_size;
+                ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, 0, 0, 0, 0);
             }
         } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
             int stream_index = ff_find_stream_index(s, sid);
             if (stream_index >= 0) {
                 AVStream *st = s->streams[stream_index];
+                uint8_t language[4];
                 url_fskip(pb, 12);
-                get_language(pb, st);
+                get_buffer(pb, language, 3);
+                if (language[0]) {
+                    language[3] = 0;
+                    av_metadata_set2(&st->metadata, "language", language, 0);
+                }
                 consumed += 15;
             }
         } else if (!ff_guidcmp(g, timestamp_guid)) {
@@ -419,18 +433,14 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
             !ff_guidcmp(g, /* DSATTRIB_PicSampleSeq */ (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) ||
             !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) ||
             !ff_guidcmp(g, /* dvr_ms_vid_frame_rep_data */ (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) ||
-            !ff_guidcmp(g, /* EVENTID_AudioDescriptorSpanningEvent */ (const ff_asf_guid){0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E}) ||
             !ff_guidcmp(g, /* EVENTID_AudioTypeSpanningEvent */ (const ff_asf_guid){0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3}) ||
             !ff_guidcmp(g, /* EVENTID_ChannelChangeSpanningEvent */ (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) ||
             !ff_guidcmp(g, /* EVENTID_ChannelInfoSpanningEvent */ (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) ||
             !ff_guidcmp(g, /* EVENTID_ChannelTypeSpanningEvent */ (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) ||
-            !ff_guidcmp(g, /* EVENTID_CtxADescriptorSpanningEvent */ (const ff_asf_guid){0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}) ||
             !ff_guidcmp(g, /* EVENTID_DVBScramblingControlSpanningEvent */ (const ff_asf_guid){0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}) ||
             !ff_guidcmp(g, /* EVENTID_PIDListSpanningEvent */ (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) ||
             !ff_guidcmp(g, /* EVENTID_SignalAndServiceStatusSpanningEvent */ (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) ||
-            !ff_guidcmp(g, /* EVENTID_StreamIDSpanningEvent */ (const ff_asf_guid){0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE}) ||
             !ff_guidcmp(g, /* EVENTID_StreamTypeSpanningEvent */ (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) ||
-            !ff_guidcmp(g, /* EVENTID_TeletextSpanningEvent */ (const ff_asf_guid){0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}) ||
             !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
             !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
             !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||