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| author | Carl Eugen Hoyos <cehoyos@ag.or.at> | 2011-04-23 12:30:18 +0400 |
|---|---|---|
| committer | Carl Eugen Hoyos <cehoyos@ag.or.at> | 2011-04-23 12:30:18 +0400 |
| commit | 8bb5d1c39c9646022720ec93ef8a1b49bf558790 (patch) | |
| tree | fc2d01a8469914eb376394dbeb495525b4d1c34b /libavformat/caf.c | |
| parent | 2a2146aac0e1c7649d674905b6a6645b722aef2e (diff) | |
Support channel layout when demuxing caf files.
Diffstat (limited to 'libavformat/caf.c')
| -rw-r--r-- | libavformat/caf.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/libavformat/caf.c b/libavformat/caf.c index 96fb8474d2..d661406657 100644 --- a/libavformat/caf.c +++ b/libavformat/caf.c @@ -56,3 +56,61 @@ const AVCodecTag ff_codec_caf_tags[] = { /*{ MPEG4TwinVQ MKBETAG('t','w','v','q') },*/ { CODEC_ID_NONE, 0 }, }; + +typedef struct CafChannelLayout { + int64_t channel_layout; + uint32_t layout_tag; +} CafChannelLayout; + +static const CafChannelLayout caf_channel_layout[] = { + { AV_CH_LAYOUT_MONO, (100<<16) | 1}, //< kCAFChannelLayoutTag_Mono + { AV_CH_LAYOUT_STEREO, (101<<16) | 2}, //< kCAFChannelLayoutTag_Stereo + { AV_CH_LAYOUT_STEREO, (102<<16) | 2}, //< kCAFChannelLayoutTag_StereoHeadphones + { AV_CH_LAYOUT_2_1, (131<<16) | 3}, //< kCAFChannelLayoutTag_ITU_2_1 + { AV_CH_LAYOUT_2_2, (132<<16) | 4}, //< kCAFChannelLayoutTag_ITU_2_2 + { AV_CH_LAYOUT_QUAD, (108<<16) | 4}, //< kCAFChannelLayoutTag_Quadraphonic + { AV_CH_LAYOUT_SURROUND, (113<<16) | 3}, //< kCAFChannelLayoutTag_MPEG_3_0_A + { AV_CH_LAYOUT_4POINT0, (115<<16) | 4}, //< kCAFChannelLayoutTag_MPEG_4_0_A + { AV_CH_LAYOUT_5POINT0_BACK, (117<<16) | 5}, //< kCAFChannelLayoutTag_MPEG_5_0_A + { AV_CH_LAYOUT_5POINT0, (117<<16) | 5}, //< kCAFChannelLayoutTag_MPEG_5_0_A + { AV_CH_LAYOUT_5POINT1_BACK, (121<<16) | 6}, //< kCAFChannelLayoutTag_MPEG_5_1_A + { AV_CH_LAYOUT_5POINT1, (121<<16) | 6}, //< kCAFChannelLayoutTag_MPEG_5_1_A + { AV_CH_LAYOUT_7POINT1, (128<<16) | 8}, //< kCAFChannelLayoutTag_MPEG_7_1_C + { AV_CH_LAYOUT_7POINT1_WIDE, (126<<16) | 8}, //< kCAFChannelLayoutTag_MPEG_7_1_A + { AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY, (133<<16) | 3}, //< kCAFChannelLayoutTag_DVD_4 + { AV_CH_LAYOUT_2_1|AV_CH_LOW_FREQUENCY, (134<<16) | 4}, //< kCAFChannelLayoutTag_DVD_5 + { AV_CH_LAYOUT_2_2|AV_CH_LOW_FREQUENCY, (135<<16) | 4}, //< kCAFChannelLayoutTag_DVD_6 + { AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY, (136<<16) | 4}, //< kCAFChannelLayoutTag_DVD_10 + { AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY, (137<<16) | 5}, //< kCAFChannelLayoutTag_DVD_11 + { 0, 0}, +}; + +void ff_read_chan_chunk(AVFormatContext *s, int64_t size, AVCodecContext *codec) +{ + uint32_t layout_tag; + AVIOContext *pb = s->pb; + const CafChannelLayout *caf_layout = caf_channel_layout; + if (size != 12) { + // Channel descriptions not implemented + av_log_ask_for_sample(s, "Unimplemented channel layout."); + avio_skip(pb, size); + return; + } + layout_tag = avio_rb32(pb); + if (layout_tag == 0x10000) { //< kCAFChannelLayoutTag_UseChannelBitmap + codec->channel_layout = avio_rb32(pb); + avio_skip(pb, 4); + return; + } + while (caf_layout->channel_layout) { + if (layout_tag == caf_layout->layout_tag) { + codec->channel_layout = caf_layout->channel_layout; + break; + } + caf_layout++; + } + if (!codec->channel_layout) + av_log(s, AV_LOG_WARNING, "Unknown channel layout."); + avio_skip(pb, 8); +} + |