From a7c6e1171b1984b949464c4d9070f10a1fd43d6d Mon Sep 17 00:00:00 2001 From: Justin Ruggles Date: Fri, 17 Apr 2009 08:39:11 +0000 Subject: ac3enc: reorder input channels to AC-3 channel order Originally committed as revision 18540 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/ac3tab.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'libavcodec/ac3tab.c') diff --git a/libavcodec/ac3tab.c b/libavcodec/ac3tab.c index 69ede84de8..36a7449a72 100644 --- a/libavcodec/ac3tab.c +++ b/libavcodec/ac3tab.c @@ -79,6 +79,21 @@ const uint8_t ff_ac3_channels_tab[8] = { 2, 1, 2, 3, 3, 4, 4, 5 }; +/** + * Table to remap channels from SMPTE order to AC-3 order. + * [channel_mode][lfe][ch] + */ +const uint8_t ff_ac3_enc_channel_map[8][2][6] = { + { { 0, 1, }, { 0, 1, 2, } }, + { { 0, }, { 0, 1, } }, + { { 0, 1, }, { 0, 1, 2, } }, + { { 0, 2, 1, }, { 0, 2, 1, 3, } }, + { { 0, 1, 2, }, { 0, 1, 3, 2, } }, + { { 0, 2, 1, 3, }, { 0, 2, 1, 4, 3, } }, + { { 0, 1, 2, 3, 4, }, { 0, 1, 3, 4, 2, } }, + { { 0, 2, 1, 3, 4, }, { 0, 2, 1, 4, 5, 3 } }, +}; + /* possible frequencies */ const uint16_t ff_ac3_sample_rate_tab[3] = { 48000, 44100, 32000 }; -- cgit v1.2.3