| // Copyright 2014 Google Inc. All Rights Reserved. |
| // |
| // Use of this source code is governed by a BSD-style license |
| // that can be found in the COPYING file in the root of the source |
| // tree. An additional intellectual property rights grant can be found |
| // in the file PATENTS. All contributing project authors may |
| // be found in the AUTHORS file in the root of the source tree. |
| // ----------------------------------------------------------------------------- |
| // |
| // YUV to RGB upsampling functions. |
| // |
| // Author(s): Branimir Vasic (branimir.vasic@imgtec.com) |
| // Djordje Pesut (djordje.pesut@imgtec.com) |
| |
| #include "src/dsp/dsp.h" |
| |
| #if defined(WEBP_USE_MIPS_DSP_R2) |
| |
| #include <assert.h> |
| #include "src/dsp/yuv.h" |
| |
| #define YUV_TO_RGB(Y, U, V, R, G, B) do { \ |
| const int t1 = MultHi(Y, 19077); \ |
| const int t2 = MultHi(V, 13320); \ |
| R = MultHi(V, 26149); \ |
| G = MultHi(U, 6419); \ |
| B = MultHi(U, 33050); \ |
| R = t1 + R; \ |
| G = t1 - G; \ |
| B = t1 + B; \ |
| R = R - 14234; \ |
| G = G - t2 + 8708; \ |
| B = B - 17685; \ |
| __asm__ volatile ( \ |
| "shll_s.w %[" #R "], %[" #R "], 17 \n\t" \ |
| "shll_s.w %[" #G "], %[" #G "], 17 \n\t" \ |
| "shll_s.w %[" #B "], %[" #B "], 17 \n\t" \ |
| "precrqu_s.qb.ph %[" #R "], %[" #R "], $zero \n\t" \ |
| "precrqu_s.qb.ph %[" #G "], %[" #G "], $zero \n\t" \ |
| "precrqu_s.qb.ph %[" #B "], %[" #B "], $zero \n\t" \ |
| "srl %[" #R "], %[" #R "], 24 \n\t" \ |
| "srl %[" #G "], %[" #G "], 24 \n\t" \ |
| "srl %[" #B "], %[" #B "], 24 \n\t" \ |
| : [R]"+r"(R), [G]"+r"(G), [B]"+r"(B) \ |
| : \ |
| ); \ |
| } while (0) |
| |
| #if !defined(WEBP_REDUCE_CSP) |
| static WEBP_INLINE void YuvToRgb(int y, int u, int v, uint8_t* const rgb) { |
| int r, g, b; |
| YUV_TO_RGB(y, u, v, r, g, b); |
| rgb[0] = r; |
| rgb[1] = g; |
| rgb[2] = b; |
| } |
| static WEBP_INLINE void YuvToBgr(int y, int u, int v, uint8_t* const bgr) { |
| int r, g, b; |
| YUV_TO_RGB(y, u, v, r, g, b); |
| bgr[0] = b; |
| bgr[1] = g; |
| bgr[2] = r; |
| } |
| static WEBP_INLINE void YuvToRgb565(int y, int u, int v, uint8_t* const rgb) { |
| int r, g, b; |
| YUV_TO_RGB(y, u, v, r, g, b); |
| { |
| const int rg = (r & 0xf8) | (g >> 5); |
| const int gb = ((g << 3) & 0xe0) | (b >> 3); |
| #if (WEBP_SWAP_16BIT_CSP == 1) |
| rgb[0] = gb; |
| rgb[1] = rg; |
| #else |
| rgb[0] = rg; |
| rgb[1] = gb; |
| #endif |
| } |
| } |
| static WEBP_INLINE void YuvToRgba4444(int y, int u, int v, |
| uint8_t* const argb) { |
| int r, g, b; |
| YUV_TO_RGB(y, u, v, r, g, b); |
| { |
| const int rg = (r & 0xf0) | (g >> 4); |
| const int ba = (b & 0xf0) | 0x0f; // overwrite the lower 4 bits |
| #if (WEBP_SWAP_16BIT_CSP == 1) |
| argb[0] = ba; |
| argb[1] = rg; |
| #else |
| argb[0] = rg; |
| argb[1] = ba; |
| #endif |
| } |
| } |
| #endif // WEBP_REDUCE_CSP |
| |
| //----------------------------------------------------------------------------- |
| // Alpha handling variants |
| |
| #if !defined(WEBP_REDUCE_CSP) |
| static WEBP_INLINE void YuvToArgb(uint8_t y, uint8_t u, uint8_t v, |
| uint8_t* const argb) { |
| int r, g, b; |
| YUV_TO_RGB(y, u, v, r, g, b); |
| argb[0] = 0xff; |
| argb[1] = r; |
| argb[2] = g; |
| argb[3] = b; |
| } |
| #endif // WEBP_REDUCE_CSP |
| static WEBP_INLINE void YuvToBgra(uint8_t y, uint8_t u, uint8_t v, |
| uint8_t* const bgra) { |
| int r, g, b; |
| YUV_TO_RGB(y, u, v, r, g, b); |
| bgra[0] = b; |
| bgra[1] = g; |
| bgra[2] = r; |
| bgra[3] = 0xff; |
| } |
| static WEBP_INLINE void YuvToRgba(uint8_t y, uint8_t u, uint8_t v, |
| uint8_t* const rgba) { |
| int r, g, b; |
| YUV_TO_RGB(y, u, v, r, g, b); |
| rgba[0] = r; |
| rgba[1] = g; |
| rgba[2] = b; |
| rgba[3] = 0xff; |
| } |
| |
| //------------------------------------------------------------------------------ |
| // Fancy upsampler |
| |
| #ifdef FANCY_UPSAMPLING |
| |
| // Given samples laid out in a square as: |
| // [a b] |
| // [c d] |
| // we interpolate u/v as: |
| // ([9*a + 3*b + 3*c + d 3*a + 9*b + 3*c + d] + [8 8]) / 16 |
| // ([3*a + b + 9*c + 3*d a + 3*b + 3*c + 9*d] [8 8]) / 16 |
| |
| // We process u and v together stashed into 32bit (16bit each). |
| #define LOAD_UV(u, v) ((u) | ((v) << 16)) |
| |
| #define UPSAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ |
| static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ |
| const uint8_t* top_u, const uint8_t* top_v, \ |
| const uint8_t* cur_u, const uint8_t* cur_v, \ |
| uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ |
| int x; \ |
| const int last_pixel_pair = (len - 1) >> 1; \ |
| uint32_t tl_uv = LOAD_UV(top_u[0], top_v[0]); /* top-left sample */ \ |
| uint32_t l_uv = LOAD_UV(cur_u[0], cur_v[0]); /* left-sample */ \ |
| assert(top_y != NULL); \ |
| { \ |
| const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ |
| FUNC(top_y[0], uv0 & 0xff, (uv0 >> 16), top_dst); \ |
| } \ |
| if (bottom_y != NULL) { \ |
| const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ |
| FUNC(bottom_y[0], uv0 & 0xff, (uv0 >> 16), bottom_dst); \ |
| } \ |
| for (x = 1; x <= last_pixel_pair; ++x) { \ |
| const uint32_t t_uv = LOAD_UV(top_u[x], top_v[x]); /* top sample */ \ |
| const uint32_t uv = LOAD_UV(cur_u[x], cur_v[x]); /* sample */ \ |
| /* precompute invariant values associated with first and second diagonals*/\ |
| const uint32_t avg = tl_uv + t_uv + l_uv + uv + 0x00080008u; \ |
| const uint32_t diag_12 = (avg + 2 * (t_uv + l_uv)) >> 3; \ |
| const uint32_t diag_03 = (avg + 2 * (tl_uv + uv)) >> 3; \ |
| { \ |
| const uint32_t uv0 = (diag_12 + tl_uv) >> 1; \ |
| const uint32_t uv1 = (diag_03 + t_uv) >> 1; \ |
| FUNC(top_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ |
| top_dst + (2 * x - 1) * XSTEP); \ |
| FUNC(top_y[2 * x - 0], uv1 & 0xff, (uv1 >> 16), \ |
| top_dst + (2 * x - 0) * XSTEP); \ |
| } \ |
| if (bottom_y != NULL) { \ |
| const uint32_t uv0 = (diag_03 + l_uv) >> 1; \ |
| const uint32_t uv1 = (diag_12 + uv) >> 1; \ |
| FUNC(bottom_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ |
| bottom_dst + (2 * x - 1) * XSTEP); \ |
| FUNC(bottom_y[2 * x + 0], uv1 & 0xff, (uv1 >> 16), \ |
| bottom_dst + (2 * x + 0) * XSTEP); \ |
| } \ |
| tl_uv = t_uv; \ |
| l_uv = uv; \ |
| } \ |
| if (!(len & 1)) { \ |
| { \ |
| const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ |
| FUNC(top_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ |
| top_dst + (len - 1) * XSTEP); \ |
| } \ |
| if (bottom_y != NULL) { \ |
| const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ |
| FUNC(bottom_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ |
| bottom_dst + (len - 1) * XSTEP); \ |
| } \ |
| } \ |
| } |
| |
| // All variants implemented. |
| UPSAMPLE_FUNC(UpsampleRgbaLinePair, YuvToRgba, 4) |
| UPSAMPLE_FUNC(UpsampleBgraLinePair, YuvToBgra, 4) |
| #if !defined(WEBP_REDUCE_CSP) |
| UPSAMPLE_FUNC(UpsampleRgbLinePair, YuvToRgb, 3) |
| UPSAMPLE_FUNC(UpsampleBgrLinePair, YuvToBgr, 3) |
| UPSAMPLE_FUNC(UpsampleArgbLinePair, YuvToArgb, 4) |
| UPSAMPLE_FUNC(UpsampleRgba4444LinePair, YuvToRgba4444, 2) |
| UPSAMPLE_FUNC(UpsampleRgb565LinePair, YuvToRgb565, 2) |
| #endif // WEBP_REDUCE_CSP |
| |
| #undef LOAD_UV |
| #undef UPSAMPLE_FUNC |
| |
| //------------------------------------------------------------------------------ |
| // Entry point |
| |
| extern void WebPInitUpsamplersMIPSdspR2(void); |
| |
| WEBP_TSAN_IGNORE_FUNCTION void WebPInitUpsamplersMIPSdspR2(void) { |
| WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair; |
| WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePair; |
| WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair; |
| WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair; |
| #if !defined(WEBP_REDUCE_CSP) |
| WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair; |
| WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePair; |
| WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair; |
| WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair; |
| WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair; |
| WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair; |
| WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair; |
| #endif // WEBP_REDUCE_CSP |
| } |
| |
| #endif // FANCY_UPSAMPLING |
| |
| //------------------------------------------------------------------------------ |
| // YUV444 converter |
| |
| #define YUV444_FUNC(FUNC_NAME, FUNC, XSTEP) \ |
| static void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ |
| uint8_t* dst, int len) { \ |
| int i; \ |
| for (i = 0; i < len; ++i) FUNC(y[i], u[i], v[i], &dst[i * XSTEP]); \ |
| } |
| |
| YUV444_FUNC(Yuv444ToRgba, YuvToRgba, 4) |
| YUV444_FUNC(Yuv444ToBgra, YuvToBgra, 4) |
| #if !defined(WEBP_REDUCE_CSP) |
| YUV444_FUNC(Yuv444ToRgb, YuvToRgb, 3) |
| YUV444_FUNC(Yuv444ToBgr, YuvToBgr, 3) |
| YUV444_FUNC(Yuv444ToArgb, YuvToArgb, 4) |
| YUV444_FUNC(Yuv444ToRgba4444, YuvToRgba4444, 2) |
| YUV444_FUNC(Yuv444ToRgb565, YuvToRgb565, 2) |
| #endif // WEBP_REDUCE_CSP |
| |
| #undef YUV444_FUNC |
| |
| //------------------------------------------------------------------------------ |
| // Entry point |
| |
| extern void WebPInitYUV444ConvertersMIPSdspR2(void); |
| |
| WEBP_TSAN_IGNORE_FUNCTION void WebPInitYUV444ConvertersMIPSdspR2(void) { |
| WebPYUV444Converters[MODE_RGBA] = Yuv444ToRgba; |
| WebPYUV444Converters[MODE_BGRA] = Yuv444ToBgra; |
| WebPYUV444Converters[MODE_rgbA] = Yuv444ToRgba; |
| WebPYUV444Converters[MODE_bgrA] = Yuv444ToBgra; |
| #if !defined(WEBP_REDUCE_CSP) |
| WebPYUV444Converters[MODE_RGB] = Yuv444ToRgb; |
| WebPYUV444Converters[MODE_BGR] = Yuv444ToBgr; |
| WebPYUV444Converters[MODE_ARGB] = Yuv444ToArgb; |
| WebPYUV444Converters[MODE_RGBA_4444] = Yuv444ToRgba4444; |
| WebPYUV444Converters[MODE_RGB_565] = Yuv444ToRgb565; |
| WebPYUV444Converters[MODE_Argb] = Yuv444ToArgb; |
| WebPYUV444Converters[MODE_rgbA_4444] = Yuv444ToRgba4444; |
| #endif // WEBP_REDUCE_CSP |
| } |
| |
| #else // !WEBP_USE_MIPS_DSP_R2 |
| |
| WEBP_DSP_INIT_STUB(WebPInitYUV444ConvertersMIPSdspR2) |
| |
| #endif // WEBP_USE_MIPS_DSP_R2 |
| |
| #if !(defined(FANCY_UPSAMPLING) && defined(WEBP_USE_MIPS_DSP_R2)) |
| WEBP_DSP_INIT_STUB(WebPInitUpsamplersMIPSdspR2) |
| #endif |
