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| author | Lynne <dev@lynne.ee> | 2025-02-18 23:47:13 +0100 |
|---|---|---|
| committer | Lynne <dev@lynne.ee> | 2025-02-21 03:19:14 +0100 |
| commit | 5cf4f145addeca84968cb2d687e5b20494fa7db8 (patch) | |
| tree | 638344c713dd57796f71e277326f897084748a9d /libavcodec/ffv1_parse.c | |
| parent | bc1a3bfd2cbc01ffa386312662af8a014890d861 (diff) | |
| download | ffmpeg-5cf4f145addeca84968cb2d687e5b20494fa7db8.tar.gz | |
ffv1dec: set f->state_transition for default range coder table
The table is only set when f->ac is set to CUSTOM. Setting it
for default range coder tables simplifies hardware accelerator code.
Diffstat (limited to 'libavcodec/ffv1_parse.c')
| -rw-r--r-- | libavcodec/ffv1_parse.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libavcodec/ffv1_parse.c b/libavcodec/ffv1_parse.c index 81224df214..636e2c62ab 100644 --- a/libavcodec/ffv1_parse.c +++ b/libavcodec/ffv1_parse.c @@ -104,6 +104,11 @@ int ff_ffv1_read_extra_header(FFV1Context *f) if (f->ac == AC_RANGE_CUSTOM_TAB) { for (int i = 1; i < 256; i++) f->state_transition[i] = ff_ffv1_get_symbol(&c, state, 1) + c.one_state[i]; + } else { + RangeCoder rc; + ff_build_rac_states(&rc, 0.05 * (1LL << 32), 256 - 8); + for (int i = 1; i < 256; i++) + f->state_transition[i] = rc.one_state[i]; } f->colorspace = ff_ffv1_get_symbol(&c, state, 0); //YUV cs type @@ -219,6 +224,11 @@ int ff_ffv1_parse_header(FFV1Context *f, RangeCoder *c, uint8_t *state) } f->state_transition[i] = st; } + } else { + RangeCoder rc; + ff_build_rac_states(&rc, 0.05 * (1LL << 32), 256 - 8); + for (int i = 1; i < 256; i++) + f->state_transition[i] = rc.one_state[i]; } colorspace = ff_ffv1_get_symbol(c, state, 0); //YUV cs type |