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authorMichael Niedermayer <michaelni@gmx.at>2014-06-05 23:21:15 +0200
committerMichael Niedermayer <michaelni@gmx.at>2014-06-05 23:21:15 +0200
commit0a2004b6d11ff962361420c3150fe760cf1f7115 (patch)
tree3a8beed2568ecbe1a7fe1443d5a24988577db099
parentbd650ee318872f9712b496bdba532fed40a0108a (diff)
downloadffmpeg-0a2004b6d11ff962361420c3150fe760cf1f7115.tar.gz
avcodec/aic: fix quantization table permutation
Fixes Ticket3700 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
-rw-r--r--libavcodec/aic.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/libavcodec/aic.c b/libavcodec/aic.c
index 373cf99a26..23bfa0b3e6 100644
--- a/libavcodec/aic.c
+++ b/libavcodec/aic.c
@@ -152,6 +152,7 @@ typedef struct AICContext {
int16_t *data_ptr[NUM_BANDS];
DECLARE_ALIGNED(16, int16_t, block)[64];
+ DECLARE_ALIGNED(16, uint8_t, quant_matrix)[64];
} AICContext;
static int aic_decode_header(AICContext *ctx, const uint8_t *src, int size)
@@ -287,7 +288,7 @@ static void recombine_block_il(int16_t *dst, const uint8_t *scan,
}
}
-static void unquant_block(int16_t *block, int q)
+static void unquant_block(int16_t *block, int q, uint8_t *quant_matrix)
{
int i;
@@ -295,7 +296,7 @@ static void unquant_block(int16_t *block, int q)
int val = (uint16_t)block[i];
int sign = val & 1;
- block[i] = (((val >> 1) ^ -sign) * q * aic_quant_matrix[i] >> 4)
+ block[i] = (((val >> 1) ^ -sign) * q * quant_matrix[i] >> 4)
+ sign;
}
}
@@ -336,7 +337,7 @@ static int aic_decode_slice(AICContext *ctx, int mb_x, int mb_y,
else
recombine_block_il(ctx->block, ctx->scantable.permutated,
&base_y, &ext_y, blk);
- unquant_block(ctx->block, ctx->quant);
+ unquant_block(ctx->block, ctx->quant, ctx->quant_matrix);
ctx->dsp.idct(ctx->block);
if (!ctx->interlaced) {
@@ -354,7 +355,7 @@ static int aic_decode_slice(AICContext *ctx, int mb_x, int mb_y,
for (blk = 0; blk < 2; blk++) {
recombine_block(ctx->block, ctx->scantable.permutated,
&base_c, &ext_c);
- unquant_block(ctx->block, ctx->quant);
+ unquant_block(ctx->block, ctx->quant, ctx->quant_matrix);
ctx->dsp.idct(ctx->block);
ctx->dsp.put_signed_pixels_clamped(ctx->block, C[blk],
ctx->frame->linesize[blk + 1]);
@@ -432,6 +433,8 @@ static av_cold int aic_decode_init(AVCodecContext *avctx)
for (i = 0; i < 64; i++)
scan[i] = i;
ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, scan);
+ for (i = 0; i < 64; i++)
+ ctx->quant_matrix[ctx->dsp.idct_permutation[i]] = aic_quant_matrix[i];
ctx->mb_width = FFALIGN(avctx->width, 16) >> 4;
ctx->mb_height = FFALIGN(avctx->height, 16) >> 4;