virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

avcodec/vp3: Make tables used to initialize VLCs smaller

Browse Source 
This is possible by switching to ff_init_vlc_from_lengths() because it
allows to replace codes of type uint16_t by symbols of type uint8_t; in
some cases (like here) it also allows to replace explicitly coded
codes by implicitly coded symbols.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-11-06 10:35:12 +01:00
parent 22241d12c7
commit 4cb4345f78
3 changed files with 987 additions and 3244 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
libavcodec/vp3.c
View File

@ -2434,17 +2434,21 @@ static av_cold int vp3_decode_init(AVCodecContext *avctx)
/* init VLC tables */
if (s->version < 2) {
for (i = 0; i < FF_ARRAY_ELEMS(s->coeff_vlc); i++) {
if ((ret = init_vlc(&s->coeff_vlc[i], 11, 32,
&vp3_bias[i][0][1], 4, 2,
&vp3_bias[i][0][0], 4, 2, 0)) < 0)
ret = ff_init_vlc_from_lengths(&s->coeff_vlc[i], 11, 32,
&vp3_bias[i][0][1], 2,
&vp3_bias[i][0][0], 2, 1,
0, 0, avctx);
if (ret < 0)
return ret;
}
#if CONFIG_VP4_DECODER
} else { /* version >= 2 */
for (i = 0; i < FF_ARRAY_ELEMS(s->coeff_vlc); i++) {
if ((ret = init_vlc(&s->coeff_vlc[i], 11, 32,
&vp4_bias[i][0][1], 4, 2,
&vp4_bias[i][0][0], 4, 2, 0)) < 0)
ret = ff_init_vlc_from_lengths(&s->coeff_vlc[i], 11, 32,
&vp4_bias[i][0][1], 2,
&vp4_bias[i][0][0], 2, 1,
0, 0, avctx);
if (ret < 0)
return ret;
}
#endif
@ -2463,14 +2467,16 @@ static av_cold int vp3_decode_init(AVCodecContext *avctx)
if (ret < 0)
return ret;
if ((ret = init_vlc(&s->fragment_run_length_vlc, 5, 30,
&fragment_run_length_vlc_table[0][1], 4, 2,
&fragment_run_length_vlc_table[0][0], 4, 2, 0)) < 0)
ret = ff_init_vlc_from_lengths(&s->fragment_run_length_vlc, 5, 30,
fragment_run_length_vlc_len, 1,
NULL, 0, 0, 0, 0, avctx);
if (ret < 0)
return ret;
if ((ret = init_vlc(&s->mode_code_vlc, 3, 8,
&mode_code_vlc_table[0][1], 2, 1,
&mode_code_vlc_table[0][0], 2, 1, 0)) < 0)
ret = ff_init_vlc_from_lengths(&s->mode_code_vlc, 3, 8,
mode_code_vlc_len, 1,
NULL, 0, 0, 0, 0, avctx);
if (ret < 0)
return ret;
if ((ret = init_vlc(&s->motion_vector_vlc, 6, 63,

3077
libavcodec/vp3data.h
View File

File diff suppressed because it is too large Load Diff

1124
libavcodec/vp4data.h
View File

File diff suppressed because it is too large Load Diff