diff options
| author | Tim Walker <tdskywalker@gmail.com> | 2012-12-31 15:33:24 +0100 |
|---|---|---|
| committer | Justin Ruggles <justin.ruggles@gmail.com> | 2013-01-22 16:10:02 -0500 |
| commit | 3ffcccb4fbaae4d5ad775506f1f2761f2029affa (patch) | |
| tree | 9fbbc0ce85e4e92c65b2d4700d9bdf2dc9c8fa17 /libavcodec/mlpdec.c | |
| parent | 99ccd2ba10eac2b282c272ad9e75f082123c765a (diff) | |
mlpdec: TrueHD: use Libav channel order.
Fixes bug 208.
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
CC:libav-stable@libav.org
Diffstat (limited to 'libavcodec/mlpdec.c')
| -rw-r--r-- | libavcodec/mlpdec.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c index cd9426d5fe..f8c647a389 100644 --- a/libavcodec/mlpdec.c +++ b/libavcodec/mlpdec.c @@ -149,6 +149,36 @@ typedef struct MLPDecodeContext { MLPDSPContext dsp; } MLPDecodeContext; +static const uint64_t thd_channel_order[] = { + AV_CH_FRONT_LEFT, AV_CH_FRONT_RIGHT, // LR + AV_CH_FRONT_CENTER, // C + AV_CH_LOW_FREQUENCY, // LFE + AV_CH_SIDE_LEFT, AV_CH_SIDE_RIGHT, // LRs + AV_CH_TOP_FRONT_LEFT, AV_CH_TOP_FRONT_RIGHT, // LRvh + AV_CH_FRONT_LEFT_OF_CENTER, AV_CH_FRONT_RIGHT_OF_CENTER, // LRc + AV_CH_BACK_LEFT, AV_CH_BACK_RIGHT, // LRrs + AV_CH_BACK_CENTER, // Cs + AV_CH_TOP_CENTER, // Ts + AV_CH_SURROUND_DIRECT_LEFT, AV_CH_SURROUND_DIRECT_RIGHT, // LRsd + AV_CH_WIDE_LEFT, AV_CH_WIDE_RIGHT, // LRw + AV_CH_TOP_FRONT_CENTER, // Cvh + AV_CH_LOW_FREQUENCY_2, // LFE2 +}; + +static uint64_t thd_channel_layout_extract_channel(uint64_t channel_layout, + int index) +{ + int i; + + if (av_get_channel_layout_nb_channels(channel_layout) <= index) + return 0; + + for (i = 0; i < FF_ARRAY_ELEMS(thd_channel_order); i++) + if (channel_layout & thd_channel_order[i] && !index--) + return thd_channel_order[i]; + return 0; +} + static VLC huff_vlc[3]; /** Initialize static data, constant between all invocations of the codec. */ @@ -447,6 +477,12 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp, for (ch = 0; ch <= s->max_matrix_channel; ch++) { int ch_assign = get_bits(gbp, 6); + if (m->avctx->codec_id == AV_CODEC_ID_TRUEHD) { + uint64_t channel = thd_channel_layout_extract_channel(s->ch_layout, + ch_assign); + ch_assign = av_get_channel_layout_channel_index(s->ch_layout, + channel); + } if (ch_assign > s->max_matrix_channel) { av_log_ask_for_sample(m->avctx, "Assignment of matrix channel %d to invalid output channel %d.\n", |