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avcodec/adpcm_ima_cunning: document origin of tables 

Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
This commit is contained in:
Zane van Iperen 2020-10-24 15:47:55 +10:00
parent 7b0d179195
commit 7fc97fb7f4
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1 changed files with 12 additions and 0 deletions
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libavcodec/adpcm_data.c
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@ -178,10 +178,22 @@ const int16_t ff_adpcm_mtaf_stepsize[32][16] = {
-424, -1273, -2121, -2970, -3819, -4668, -5516, -6365, },
};
/*
* Dumped from the binaries:
* - FantasticJourney.exe - 0x794D2, DGROUP:0x47A4D2
* - BigRaceUSA.exe - 0x9B8AA, DGROUP:0x49C4AA
* - Timeshock!.exe - 0x8506A, DGROUP:0x485C6A
*/
const int8_t ff_adpcm_ima_cunning_index_table[9] = {
-1, -1, -1, -1, 1, 2, 3, 4, -1
};
/*
* Dumped from the binaries:
* - FantasticJourney.exe - 0x79458, DGROUP:0x47A458
* - BigRaceUSA.exe - 0x9B830, DGROUP:0x49C430
* - Timeshock!.exe - 0x84FF0, DGROUP:0x485BF0
*/
const int16_t ff_adpcm_ima_cunning_step_table[61] = {
1, 1, 1, 1, 2, 2, 3, 3, 4, 5,
6, 7, 8, 10, 12, 14, 16, 20, 24, 28,