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avcodec/texturedsp : add rgtc1u gray decoding
decode rgtc1 block in gray8 picture
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f6d49a0dc8
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07e427aa56
@ -413,7 +413,7 @@ static int dxt5ys_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
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static inline void rgtc_block_internal(uint8_t *dst, ptrdiff_t stride,
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const uint8_t *block,
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const int *color_tab, int alpha)
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const int *color_tab, int mono, int offset, int pix_size)
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{
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uint8_t indices[16];
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int x, y;
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@ -430,19 +430,19 @@ static inline void rgtc_block_internal(uint8_t *dst, ptrdiff_t stride,
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/* Interval expansion from [-1 1] or [0 1] to [0 255]. */
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int c = color_tab[i];
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if (alpha){
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dst [x * 4 + y * stride + 3] = (uint8_t)c;
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if (mono){
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dst [x * pix_size + y * stride + offset] = (uint8_t)c;
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}
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else{
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uint32_t pixel = RGBA(c, c, c, 255U);
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AV_WL32(dst + x * 4 + y * stride, pixel);
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AV_WL32(dst + x * pix_size + y * stride, pixel);
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}
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}
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}
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}
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static inline void rgtc1_block_internal(uint8_t *dst, ptrdiff_t stride,
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const uint8_t *block, int sign, int alpha)
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const uint8_t *block, int sign, int mono, int offset, int pix_size)
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{
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int color_table[8];
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int r0, r1;
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@ -478,7 +478,7 @@ static inline void rgtc1_block_internal(uint8_t *dst, ptrdiff_t stride,
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color_table[7] = 255; /* max range */ // bit code 111
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}
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rgtc_block_internal(dst, stride, block, color_table, alpha);
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rgtc_block_internal(dst, stride, block, color_table, mono, offset, pix_size);
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}
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/**
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@ -492,7 +492,7 @@ static inline void rgtc1_block_internal(uint8_t *dst, ptrdiff_t stride,
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*/
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static int rgtc1s_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
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{
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rgtc1_block_internal(dst, stride, block, 1, 0);
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rgtc1_block_internal(dst, stride, block, 1, 0, 0, 4);
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return 8;
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}
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@ -508,13 +508,13 @@ static int rgtc1s_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
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*/
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static int rgtc1u_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
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{
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rgtc1_block_internal(dst, stride, block, 0, 0);
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rgtc1_block_internal(dst, stride, block, 0, 0, 0, 4);
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return 8;
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}
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/**
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* Decompress one block of a RGRC1 texture with unsigned components
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* Decompress one block of a RGTC1 texture with unsigned components
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* and overwrite the alpha component in 'dst' (RGBA data).
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*
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* @param dst output buffer.
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@ -524,7 +524,23 @@ static int rgtc1u_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
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*/
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static int rgtc1u_alpha_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
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{
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rgtc1_block_internal(dst, stride, block, 0, 1);
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rgtc1_block_internal(dst, stride, block, 0, 1, 3, 4);
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return 8;
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}
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/**
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* Decompress one block of a RGTC1 texture with unsigned components
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* to Gray 8.
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*
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* @param dst output buffer.
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* @param stride scanline in bytes.
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* @param block block to decompress.
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* @return how much texture data has been consumed.
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*/
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static int rgtc1u_gray_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
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{
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rgtc1_block_internal(dst, stride, block, 0, 1, 0, 1);
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return 8;
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}
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@ -538,8 +554,8 @@ static inline void rgtc2_block_internal(uint8_t *dst, ptrdiff_t stride,
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int x, y;
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/* Decompress the two channels separately and interleave them afterwards. */
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rgtc1_block_internal(c0, 16, block, sign, 0);
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rgtc1_block_internal(c1, 16, block + 8, sign, 0);
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rgtc1_block_internal(c0, 16, block, sign, 0, 0, 4);
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rgtc1_block_internal(c1, 16, block + 8, sign, 0, 0, 4);
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/* B is rebuilt exactly like a normal map. */
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for (y = 0; y < 4; y++) {
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@ -630,6 +646,7 @@ av_cold void ff_texturedsp_init(TextureDSPContext *c)
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c->dxt5ys_block = dxt5ys_block;
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c->rgtc1s_block = rgtc1s_block;
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c->rgtc1u_block = rgtc1u_block;
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c->rgtc1u_gray_block = rgtc1u_gray_block;
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c->rgtc1u_alpha_block = rgtc1u_alpha_block;
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c->rgtc2s_block = rgtc2s_block;
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c->rgtc2u_block = rgtc2u_block;
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@ -53,6 +53,7 @@ typedef struct TextureDSPContext {
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int (*dxt5ys_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc1s_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc1u_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc1u_gray_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc1u_alpha_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc2s_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc2u_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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