diff options
author | Benjamin Larsson <banan@ludd.ltu.se> | 2008-11-01 20:27:05 +0000 |
---|---|---|
committer | Benjamin Larsson <banan@ludd.ltu.se> | 2008-11-01 20:27:05 +0000 |
commit | 87c3b9bce34e1480a3d208df8b3fc13d6c3ed185 (patch) | |
tree | c399d6379ea9fe55dca0611ba356370ed6b10edc /libavcodec/dca.c | |
parent | b2153658171f16dbac19c09ad4198692400093e8 (diff) | |
download | ffmpeg-streaming-87c3b9bce34e1480a3d208df8b3fc13d6c3ed185.zip ffmpeg-streaming-87c3b9bce34e1480a3d208df8b3fc13d6c3ed185.tar.gz |
Add channel layouts for dca.
Originally committed as revision 15765 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/dca.c')
-rw-r--r-- | libavcodec/dca.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/libavcodec/dca.c b/libavcodec/dca.c index e878527..3e465c4 100644 --- a/libavcodec/dca.c +++ b/libavcodec/dca.c @@ -59,6 +59,52 @@ enum DCAMode { DCA_4F2R }; +/* Tables for mapping dts channel configurations to libavcodec multichannel api. + * Some compromises have been made for special configurations. Most configurations + * are never used so complete accuracy is not needed. + * + * L = left, R = right, C = center, S = surround, F = front, R = rear, T = total, OV = overhead. + * S -> back, when both rear and back are configured move one of them to the side channel + * OV -> center back + * All 2 channel configurations -> CHANNEL_LAYOUT_STEREO + */ + +static const int64_t dca_core_channel_layout[] = { + CHANNEL_FRONT_CENTER, ///< 1, A + CHANNEL_LAYOUT_STEREO, ///< 2, A + B (dual mono) + CHANNEL_LAYOUT_STEREO, ///< 2, L + R (stereo) + CHANNEL_LAYOUT_STEREO, ///< 2, (L+R) + (L-R) (sum-difference) + CHANNEL_LAYOUT_STEREO, ///< 2, LT +RT (left and right total) + CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER, ///< 3, C+L+R + CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_CENTER, ///< 3, L+R+S + CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER|CHANNEL_BACK_CENTER, ///< 4, C + L + R+ S + CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT, ///< 4, L + R+ SL+SR + CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT, ///< 5, C + L + R+ SL+SR + CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER, ///< 6, CL + CR + L + R + SL + SR + CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_FRONT_CENTER|CHANNEL_BACK_CENTER, ///< 6, C + L + R+ LR + RR + OV + CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_BACK_CENTER|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT, ///< 6, CF+ CR+LF+ RF+LR + RR + CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT, ///< 7, CL + C + CR + L + R + SL + SR + CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_SIDE_LEFT|CHANNEL_SIDE_RIGHT|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT, ///< 8, CL + CR + L + R + SL1 + SL2+ SR1 + SR2 + CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_CENTER|CHANNEL_BACK_RIGHT, ///< 8, CL + C+ CR + L + R + SL + S+ SR + + /* The following entries adds the LFE layouts, this way we can reuse the table for the AVCodec channel_layouts member*/ + CHANNEL_FRONT_CENTER|CHANNEL_LOW_FREQUENCY, + CHANNEL_LAYOUT_STEREO|CHANNEL_LOW_FREQUENCY, + CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER|CHANNEL_LOW_FREQUENCY, + CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_CENTER|CHANNEL_LOW_FREQUENCY, + CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER|CHANNEL_BACK_CENTER|CHANNEL_LOW_FREQUENCY, + CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY, + CHANNEL_LAYOUT_STEREO|CHANNEL_FRONT_CENTER|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY, + CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LOW_FREQUENCY, + CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_FRONT_CENTER|CHANNEL_BACK_CENTER|CHANNEL_LOW_FREQUENCY, + CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_BACK_CENTER|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY, + CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY, + CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_SIDE_LEFT|CHANNEL_SIDE_RIGHT|CHANNEL_BACK_LEFT|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY, + CHANNEL_FRONT_LEFT_OF_CENTER|CHANNEL_FRONT_CENTER|CHANNEL_FRONT_RIGHT_OF_CENTER|CHANNEL_LAYOUT_STEREO|CHANNEL_BACK_LEFT|CHANNEL_BACK_CENTER|CHANNEL_BACK_RIGHT|CHANNEL_LOW_FREQUENCY, + 0, +}; + + #define DCA_DOLBY 101 /* FIXME */ #define DCA_CHANNEL_BITS 6 @@ -1165,7 +1211,17 @@ static int dca_decode_frame(AVCodecContext * avctx, if(avctx->request_channels == 2 && s->prim_channels > 2) { channels = 2; s->output = DCA_STEREO; + avctx->channel_layout = CHANNEL_LAYOUT_STEREO; } + if (s->amode<16) + avctx->channel_layout = dca_core_channel_layout[s->amode]; + else { + av_log(avctx, AV_LOG_ERROR, "Custom channel layouts not supported\n"); + //Maybe just guess layout depending on the channel count + return -1; + } + + if (s->lfe) avctx->channel_layout |= CHANNEL_LOW_FREQUENCY; /* There is nothing that prevents a dts frame to change channel configuration but FFmpeg doesn't support that so only set the channels if it is previously @@ -1244,4 +1300,5 @@ AVCodec dca_decoder = { .decode = dca_decode_frame, .close = dca_decode_end, .long_name = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"), + .channel_layouts = dca_core_channel_layout, }; |