- // stereo input or something not handled below
- default:
- case HB_INPUT_CH_LAYOUT_STEREO:
- // mono gets mixed up to stereo & more than stereo gets mixed down
- if ( audio->config.out.mixdown > HB_AMIXDOWN_STEREO )
- {
- audio->config.out.mixdown = HB_AMIXDOWN_STEREO;
- }
- break;
-
- // mono input
- case HB_INPUT_CH_LAYOUT_MONO:
- // everything else passes through
- audio->config.out.mixdown = HB_AMIXDOWN_MONO;
- break;
-
- // dolby (DPL1 aka Dolby Surround = 4.0 matrix-encoded) input
- // the A52 flags don't allow for a way to distinguish between DPL1 and
- // DPL2 on a DVD so we always assume a DPL1 source for A52_DOLBY.
- case HB_INPUT_CH_LAYOUT_DOLBY:
- if ( audio->config.out.mixdown > HB_AMIXDOWN_DOLBY )
- {
- audio->config.out.mixdown = HB_AMIXDOWN_DOLBY;
- }
- break;
-
- // 4 channel discrete
- case HB_INPUT_CH_LAYOUT_2F2R:
- case HB_INPUT_CH_LAYOUT_3F1R:
- if ( audio->config.out.mixdown > HB_AMIXDOWN_DOLBY )
- {
- audio->config.out.mixdown = HB_AMIXDOWN_DOLBY;
- }
- break;
-
- // 5 or 6 channel discrete
- case HB_INPUT_CH_LAYOUT_3F2R:
- if ( ! ( audio->config.in.channel_layout &
- HB_INPUT_CH_LAYOUT_HAS_LFE ) )
- {
- // we don't do 5 channel discrete so mixdown to DPLII
- audio->config.out.mixdown = HB_AMIXDOWN_DOLBYPLII;
- }
- break;