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| author | Michael Niedermayer <michaelni@gmx.at> | 2014-06-05 23:21:15 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-06-23 16:51:09 +0200 |
| commit | 4d1346d46acc3ed035ba028954c4dc86cbb72a9b (patch) | |
| tree | e3e33cbd239d496123377b9e98015d09d5e17125 | |
| parent | 66a9c50d42e01f23dfed12dc55112b4d27b11f8f (diff) | |
| download | ffmpeg-4d1346d46acc3ed035ba028954c4dc86cbb72a9b.tar.gz | |
avcodec/aic: fix quantization table permutation
Fixes Ticket3700
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 0a2004b6d11ff962361420c3150fe760cf1f7115)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavcodec/aic.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/libavcodec/aic.c b/libavcodec/aic.c index a7e3691aa0..3963642194 100644 --- a/libavcodec/aic.c +++ b/libavcodec/aic.c @@ -150,6 +150,7 @@ 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) @@ -285,7 +286,7 @@ 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; @@ -293,7 +294,7 @@ 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; } } @@ -334,7 +335,7 @@ 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) { @@ -352,7 +353,7 @@ 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]); @@ -430,6 +431,8 @@ 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; |