Get audio_service_type for AC-3 based on bitstream mode in the AC-3 parser
[ffmpeg.git] / libavcodec / ac3_parser.c
index 16cffe8..82eeda3 100644 (file)
@@ -69,7 +69,7 @@ int ff_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr)
 
         skip_bits(gbc, 5); // skip bsid, already got it
 
-        skip_bits(gbc, 3); // skip bitstream mode
+        hdr->bitstream_mode = get_bits(gbc, 3);
         hdr->channel_mode = get_bits(gbc, 3);
 
         if(hdr->channel_mode == AC3_CHMODE_STEREO) {
@@ -151,6 +151,9 @@ static int ac3_sync(uint64_t state, AACAC3ParseContext *hdr_info,
     hdr_info->channels = hdr.channels;
     hdr_info->channel_layout = hdr.channel_layout;
     hdr_info->samples = hdr.num_blocks * 256;
+    hdr_info->service_type = hdr.bitstream_mode;
+    if (hdr.bitstream_mode == 0x7 && hdr.channels > 1)
+        hdr_info->service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
     if(hdr.bitstream_id>10)
         hdr_info->codec_id = CODEC_ID_EAC3;
     else if (hdr_info->codec_id == CODEC_ID_NONE)