+
+static int decdcaBSInfo( hb_work_object_t *w, const hb_buffer_t *b,
+ hb_work_info_t *info )
+{
+ int i, flags, rate, bitrate, frame_length;
+ dca_state_t * state = dca_init( 0 );
+
+ memset( info, 0, sizeof(*info) );
+
+ /* since DCA frames don't line up with MPEG ES frames scan the
+ * entire frame for an DCA sync pattern. */
+ for ( i = 0; i < b->size - 7; ++i )
+ {
+ if( dca_syncinfo( state, &b->data[i], &flags, &rate, &bitrate,
+ &frame_length ) )
+ {
+ break;
+ }
+ }
+ if ( i >= b->size - 7 )
+ {
+ /* didn't find DCA sync */
+ return 0;
+ }
+
+ info->name = "DCA";
+ info->rate = rate;
+ info->rate_base = 1;
+ info->bitrate = bitrate;
+ info->flags = flags;
+
+ if ( ( flags & DCA_CHANNEL_MASK) == DCA_DOLBY )
+ {
+ info->flags |= AUDIO_F_DOLBY;
+ }
+
+ switch( flags & DCA_CHANNEL_MASK )
+ {
+ /* mono sources */
+ case DCA_MONO:
+ info->channel_layout = HB_INPUT_CH_LAYOUT_MONO;
+ break;
+ /* stereo input */
+ case DCA_CHANNEL:
+ case DCA_STEREO:
+ case DCA_STEREO_SUMDIFF:
+ case DCA_STEREO_TOTAL:
+ info->channel_layout = HB_INPUT_CH_LAYOUT_STEREO;
+ break;
+ /* 3F/2R input */
+ case DCA_3F2R:
+ info->channel_layout = HB_INPUT_CH_LAYOUT_3F2R;
+ break;
+ /* 3F/1R input */
+ case DCA_3F1R:
+ info->channel_layout = HB_INPUT_CH_LAYOUT_3F1R;
+ break;
+ /* other inputs */
+ case DCA_3F:
+ info->channel_layout = HB_INPUT_CH_LAYOUT_3F;
+ break;
+ case DCA_2F1R:
+ info->channel_layout = HB_INPUT_CH_LAYOUT_2F1R;
+ break;
+ case DCA_2F2R:
+ info->channel_layout = HB_INPUT_CH_LAYOUT_2F2R;
+ break;
+ case DCA_4F2R:
+ info->channel_layout = HB_INPUT_CH_LAYOUT_4F2R;
+ break;
+ /* unknown */
+ default:
+ info->channel_layout = HB_INPUT_CH_LAYOUT_STEREO;
+ }
+
+ if (flags & DCA_LFE)
+ {
+ info->channel_layout |= HB_INPUT_CH_LAYOUT_HAS_LFE;
+ }
+
+ return 1;
+}