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avcodec/magicyuv: invert symbols when building vlc

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Instead at every decoded symbol.
This commit is contained in:
Paul B Mahol
2020-08-31 16:19:55 +02:00
parent eb9fa00bcc
commit 445e5fb67a
1 changed files with 5 additions and 5 deletions
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10
libavcodec/magicyuv.c
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@@ -113,7 +113,7 @@ static int huff_build10(VLC *vlc, uint8_t *len)
for (i = 1023; i >= 0; i--) { for (i = 1023; i >= 0; i--) {
codes[i] = code >> (32 - he[i].len); codes[i] = code >> (32 - he[i].len);
bits[i] = he[i].len; bits[i] = he[i].len;
syms[i] = he[i].sym; syms[i] = 1023 - he[i].sym;
code += 0x80000000u >> (he[i].len - 1); code += 0x80000000u >> (he[i].len - 1);
} }
@@ -145,7 +145,7 @@ static int huff_build12(VLC *vlc, uint8_t *len)
for (i = 4095; i >= 0; i--) { for (i = 4095; i >= 0; i--) {
codes[i] = code >> (32 - he[i].len); codes[i] = code >> (32 - he[i].len);
bits[i] = he[i].len; bits[i] = he[i].len;
syms[i] = he[i].sym; syms[i] = 4095 - he[i].sym;
code += 0x80000000u >> (he[i].len - 1); code += 0x80000000u >> (he[i].len - 1);
} }
@@ -177,7 +177,7 @@ static int huff_build(VLC *vlc, uint8_t *len)
for (i = 255; i >= 0; i--) { for (i = 255; i >= 0; i--) {
codes[i] = code >> (32 - he[i].len); codes[i] = code >> (32 - he[i].len);
bits[i] = he[i].len; bits[i] = he[i].len;
syms[i] = he[i].sym; syms[i] = 255 - he[i].sym;
code += 0x80000000u >> (he[i].len - 1); code += 0x80000000u >> (he[i].len - 1);
} }
@@ -259,7 +259,7 @@ static int magy_decode_slice10(AVCodecContext *avctx, void *tdata,
if (pix < 0) if (pix < 0)
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
dst[x] = max - pix; dst[x] = pix;
} }
dst += stride; dst += stride;
} }
@@ -389,7 +389,7 @@ static int magy_decode_slice(AVCodecContext *avctx, void *tdata,
if (pix < 0) if (pix < 0)
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
dst[x] = 255 - pix; dst[x] = pix;
} }
dst += stride; dst += stride;
} }