Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

avcodec/cfhdenc: optimize writting of small runcodes

Browse Source
pull/345/head^2
Paul B Mahol 5 years ago
parent 16b79f3d3a
commit ba0825626a
1 changed files with 8 additions and 5 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Unified View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 13
      libavcodec/cfhdenc.c

13
libavcodec/cfhdenc.c
Unescape View File

@ -94,8 +94,11 @@ static const unsigned codebook[256][2] = {
}; };
/* Derived by extracting runcodes from existing tables from decoder */ /* Derived by extracting runcodes from existing tables from decoder */
static const uint16_t runbook[8][3] = { static const uint16_t runbook[18][3] = {
{1, 0x0000, 1}, {7, 0x0069, 12}, {8, 0x00D1, 20}, {9, 0x018A, 32}, {1, 0x0000, 1}, {2, 0x0000, 2}, {3, 0x0000, 3}, {4, 0x0000, 4},
{5, 0x0000, 5}, {6, 0x0000, 6}, {7, 0x0000, 7}, {8, 0x0000, 8},
{9, 0x0000, 9}, {10, 0x0000, 10}, {11, 0x0000, 11},
{7, 0x0069, 12}, {8, 0x00D1, 20}, {9, 0x018A, 32},
{10, 0x0343, 60}, {11, 0x0685, 100}, {13, 0x18BF, 180}, {13, 0x1BA5, 320}, {10, 0x0343, 60}, {11, 0x0685, 100}, {13, 0x18BF, 180}, {13, 0x1BA5, 320},
}; };
@ -329,7 +332,7 @@ static av_cold int cfhd_encode_init(AVCodecContext *avctx)
s->rb[0].run = 0; s->rb[0].run = 0;
for (int i = 1, j = 0; i < 320 && j < 7; j++) { for (int i = 1, j = 0; i < 320 && j < 17; j++) {
int run = runbook[j][2]; int run = runbook[j][2];
int end = runbook[j+1][2]; int end = runbook[j+1][2];
@ -340,8 +343,8 @@ static av_cold int cfhd_encode_init(AVCodecContext *avctx)
} }
} }
s->rb[320].bits = runbook[7][1]; s->rb[320].bits = runbook[17][1];
s->rb[320].size = runbook[7][0]; s->rb[320].size = runbook[17][0];
s->rb[320].run = 320; s->rb[320].run = 320;
for (int i = 0; i < 256; i++) { for (int i = 0; i < 256; i++) {

Write Preview
Loading…
Cancel
Save