diff options
| author | Jan Ekström <jeebjp@gmail.com> | 2020-06-11 00:07:15 +0300 |
|---|---|---|
| committer | Jan Ekström <jeebjp@gmail.com> | 2020-08-04 00:17:56 +0300 |
| commit | 79b057f1b7dd7ff05829089d2009c7172b13704b (patch) | |
| tree | 3a2d602e07f226cb0aa693991a6d18b5905c669e | |
| parent | f5390a9f86d68ced52a39e00eca70d15d25accc7 (diff) | |
avcodec/mpeg4audio: add newer channel_coding mappings
Additionally, add comments regarding their definitions. Based on
ARIB STD-B32, which bases on 14496-3:2009 and 14496-3:2009/AMD4.
| -rw-r--r-- | libavcodec/mpeg4audio.c | 17 | ||||
| -rw-r--r-- | libavcodec/mpeg4audio.h | 2 |
2 files changed, 16 insertions, 3 deletions
diff --git a/libavcodec/mpeg4audio.c b/libavcodec/mpeg4audio.c index 0d83fb8d25..77cf2fb61c 100644 --- a/libavcodec/mpeg4audio.c +++ b/libavcodec/mpeg4audio.c @@ -64,8 +64,21 @@ const int avpriv_mpeg4audio_sample_rates[16] = { 24000, 22050, 16000, 12000, 11025, 8000, 7350 }; -const uint8_t ff_mpeg4audio_channels[8] = { - 0, 1, 2, 3, 4, 5, 6, 8 +const uint8_t ff_mpeg4audio_channels[14] = { + 0, + 1, // mono (1/0) + 2, // stereo (2/0) + 3, // 3/0 + 4, // 3/1 + 5, // 3/2 + 6, // 3/2.1 + 8, // 5/2.1 + 0, + 0, + 0, + 7, // 3/3.1 + 8, // 3/2/2.1 + 24 // 3/3/3 - 5/2/3 - 3/0/0.2 }; static inline int get_object_type(GetBitContext *gb) diff --git a/libavcodec/mpeg4audio.h b/libavcodec/mpeg4audio.h index 4b390e0f42..c4cdc1508c 100644 --- a/libavcodec/mpeg4audio.h +++ b/libavcodec/mpeg4audio.h @@ -46,7 +46,7 @@ typedef struct MPEG4AudioConfig { } MPEG4AudioConfig; extern av_export_avcodec const int avpriv_mpeg4audio_sample_rates[16]; -extern const uint8_t ff_mpeg4audio_channels[8]; +extern const uint8_t ff_mpeg4audio_channels[14]; /** * Parse MPEG-4 systems extradata from a potentially unaligned GetBitContext to retrieve audio configuration. |