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| author | Paul B Mahol <onemda@gmail.com> | 2012-12-01 14:52:22 +0000 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2013-07-05 18:10:27 +0000 |
| commit | 6516a25f04edc90b8dbc8b7f48120b08b7517ae2 (patch) | |
| tree | f64a179d4e4cd919bfa0c1867f1ead31b3da194b /libavcodec/adpcm_data.c | |
| parent | 48f2750de8a47671aa4e09e91d7ab811558d2c2f (diff) | |
| download | ffmpeg-6516a25f04edc90b8dbc8b7f48120b08b7517ae2.tar.gz | |
ADPCM IMA WAV 2, 3 and 5 bits decoder
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Diffstat (limited to 'libavcodec/adpcm_data.c')
| -rw-r--r-- | libavcodec/adpcm_data.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/libavcodec/adpcm_data.c b/libavcodec/adpcm_data.c index 0625fc9464..1d3e579a89 100644 --- a/libavcodec/adpcm_data.c +++ b/libavcodec/adpcm_data.c @@ -27,12 +27,33 @@ /* ff_adpcm_step_table[] and ff_adpcm_index_table[] are from the ADPCM reference source */ -/* This is the index table: */ +static const int8_t adpcm_index_table2[4] = { + -1, 2, + -1, 2, +}; + +static const int8_t adpcm_index_table3[8] = { + -1, -1, 1, 2, + -1, -1, 1, 2, +}; + const int8_t ff_adpcm_index_table[16] = { -1, -1, -1, -1, 2, 4, 6, 8, -1, -1, -1, -1, 2, 4, 6, 8, }; +static const int8_t adpcm_index_table5[32] = { + -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16, + -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16, +}; + +const int8_t const *ff_adpcm_index_tables[4] = { + &adpcm_index_table2[0], + &adpcm_index_table3[0], + &ff_adpcm_index_table[0], + &adpcm_index_table5[0], +}; + /** * This is the step table. Note that many programs use slight deviations from * this table, but such deviations are negligible: |