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266 lines
12 KiB
266 lines
12 KiB
// Copyright 2011 Google Inc. All Rights Reserved. |
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// |
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// Use of this source code is governed by a BSD-style license |
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// that can be found in the COPYING file in the root of the source |
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// tree. An additional intellectual property rights grant can be found |
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// in the file PATENTS. All contributing project authors may |
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// be found in the AUTHORS file in the root of the source tree. |
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// ----------------------------------------------------------------------------- |
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// |
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// YUV to RGB upsampling functions. |
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// |
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// Author: somnath@google.com (Somnath Banerjee) |
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#include "./dsp.h" |
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#include "./yuv.h" |
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#include <assert.h> |
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//------------------------------------------------------------------------------ |
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// Fancy upsampler |
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#ifdef FANCY_UPSAMPLING |
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// Fancy upsampling functions to convert YUV to RGB |
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WebPUpsampleLinePairFunc WebPUpsamplers[MODE_LAST]; |
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// Given samples laid out in a square as: |
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// [a b] |
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// [c d] |
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// we interpolate u/v as: |
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// ([9*a + 3*b + 3*c + d 3*a + 9*b + 3*c + d] + [8 8]) / 16 |
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// ([3*a + b + 9*c + 3*d a + 3*b + 3*c + 9*d] [8 8]) / 16 |
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// We process u and v together stashed into 32bit (16bit each). |
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#define LOAD_UV(u, v) ((u) | ((v) << 16)) |
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#define UPSAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ |
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static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ |
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const uint8_t* top_u, const uint8_t* top_v, \ |
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const uint8_t* cur_u, const uint8_t* cur_v, \ |
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uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ |
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int x; \ |
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const int last_pixel_pair = (len - 1) >> 1; \ |
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uint32_t tl_uv = LOAD_UV(top_u[0], top_v[0]); /* top-left sample */ \ |
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uint32_t l_uv = LOAD_UV(cur_u[0], cur_v[0]); /* left-sample */ \ |
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assert(top_y != NULL); \ |
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{ \ |
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const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ |
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FUNC(top_y[0], uv0 & 0xff, (uv0 >> 16), top_dst); \ |
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} \ |
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if (bottom_y != NULL) { \ |
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const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ |
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FUNC(bottom_y[0], uv0 & 0xff, (uv0 >> 16), bottom_dst); \ |
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} \ |
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for (x = 1; x <= last_pixel_pair; ++x) { \ |
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const uint32_t t_uv = LOAD_UV(top_u[x], top_v[x]); /* top sample */ \ |
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const uint32_t uv = LOAD_UV(cur_u[x], cur_v[x]); /* sample */ \ |
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/* precompute invariant values associated with first and second diagonals*/\ |
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const uint32_t avg = tl_uv + t_uv + l_uv + uv + 0x00080008u; \ |
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const uint32_t diag_12 = (avg + 2 * (t_uv + l_uv)) >> 3; \ |
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const uint32_t diag_03 = (avg + 2 * (tl_uv + uv)) >> 3; \ |
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{ \ |
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const uint32_t uv0 = (diag_12 + tl_uv) >> 1; \ |
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const uint32_t uv1 = (diag_03 + t_uv) >> 1; \ |
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FUNC(top_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ |
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top_dst + (2 * x - 1) * XSTEP); \ |
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FUNC(top_y[2 * x - 0], uv1 & 0xff, (uv1 >> 16), \ |
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top_dst + (2 * x - 0) * XSTEP); \ |
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} \ |
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if (bottom_y != NULL) { \ |
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const uint32_t uv0 = (diag_03 + l_uv) >> 1; \ |
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const uint32_t uv1 = (diag_12 + uv) >> 1; \ |
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FUNC(bottom_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ |
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bottom_dst + (2 * x - 1) * XSTEP); \ |
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FUNC(bottom_y[2 * x + 0], uv1 & 0xff, (uv1 >> 16), \ |
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bottom_dst + (2 * x + 0) * XSTEP); \ |
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} \ |
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tl_uv = t_uv; \ |
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l_uv = uv; \ |
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} \ |
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if (!(len & 1)) { \ |
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{ \ |
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const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ |
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FUNC(top_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ |
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top_dst + (len - 1) * XSTEP); \ |
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} \ |
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if (bottom_y != NULL) { \ |
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const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ |
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FUNC(bottom_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ |
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bottom_dst + (len - 1) * XSTEP); \ |
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} \ |
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} \ |
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} |
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// All variants implemented. |
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UPSAMPLE_FUNC(UpsampleRgbLinePair, VP8YuvToRgb, 3) |
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UPSAMPLE_FUNC(UpsampleBgrLinePair, VP8YuvToBgr, 3) |
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UPSAMPLE_FUNC(UpsampleRgbaLinePair, VP8YuvToRgba, 4) |
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UPSAMPLE_FUNC(UpsampleBgraLinePair, VP8YuvToBgra, 4) |
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UPSAMPLE_FUNC(UpsampleArgbLinePair, VP8YuvToArgb, 4) |
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UPSAMPLE_FUNC(UpsampleRgba4444LinePair, VP8YuvToRgba4444, 2) |
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UPSAMPLE_FUNC(UpsampleRgb565LinePair, VP8YuvToRgb565, 2) |
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#undef LOAD_UV |
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#undef UPSAMPLE_FUNC |
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#endif // FANCY_UPSAMPLING |
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//------------------------------------------------------------------------------ |
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#if !defined(FANCY_UPSAMPLING) |
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#define DUAL_SAMPLE_FUNC(FUNC_NAME, FUNC) \ |
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static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bot_y, \ |
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const uint8_t* top_u, const uint8_t* top_v, \ |
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const uint8_t* bot_u, const uint8_t* bot_v, \ |
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uint8_t* top_dst, uint8_t* bot_dst, int len) { \ |
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const int half_len = len >> 1; \ |
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int x; \ |
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assert(top_dst != NULL); \ |
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{ \ |
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for (x = 0; x < half_len; ++x) { \ |
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FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x + 0); \ |
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FUNC(top_y[2 * x + 1], top_u[x], top_v[x], top_dst + 8 * x + 4); \ |
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} \ |
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if (len & 1) FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x); \ |
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} \ |
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if (bot_dst != NULL) { \ |
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for (x = 0; x < half_len; ++x) { \ |
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FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x + 0); \ |
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FUNC(bot_y[2 * x + 1], bot_u[x], bot_v[x], bot_dst + 8 * x + 4); \ |
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} \ |
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if (len & 1) FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x); \ |
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} \ |
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} |
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DUAL_SAMPLE_FUNC(DualLineSamplerBGRA, VP8YuvToBgra) |
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DUAL_SAMPLE_FUNC(DualLineSamplerARGB, VP8YuvToArgb) |
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#undef DUAL_SAMPLE_FUNC |
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#endif // !FANCY_UPSAMPLING |
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WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last) { |
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WebPInitUpsamplers(); |
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VP8YUVInit(); |
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#ifdef FANCY_UPSAMPLING |
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return WebPUpsamplers[alpha_is_last ? MODE_BGRA : MODE_ARGB]; |
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#else |
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return (alpha_is_last ? DualLineSamplerBGRA : DualLineSamplerARGB); |
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#endif |
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} |
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//------------------------------------------------------------------------------ |
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// YUV444 converter |
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#define YUV444_FUNC(FUNC_NAME, FUNC, XSTEP) \ |
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extern void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ |
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uint8_t* dst, int len); \ |
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void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ |
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uint8_t* dst, int len) { \ |
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int i; \ |
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for (i = 0; i < len; ++i) FUNC(y[i], u[i], v[i], &dst[i * XSTEP]); \ |
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} |
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YUV444_FUNC(WebPYuv444ToRgbC, VP8YuvToRgb, 3) |
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YUV444_FUNC(WebPYuv444ToBgrC, VP8YuvToBgr, 3) |
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YUV444_FUNC(WebPYuv444ToRgbaC, VP8YuvToRgba, 4) |
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YUV444_FUNC(WebPYuv444ToBgraC, VP8YuvToBgra, 4) |
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YUV444_FUNC(WebPYuv444ToArgbC, VP8YuvToArgb, 4) |
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YUV444_FUNC(WebPYuv444ToRgba4444C, VP8YuvToRgba4444, 2) |
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YUV444_FUNC(WebPYuv444ToRgb565C, VP8YuvToRgb565, 2) |
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#undef YUV444_FUNC |
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WebPYUV444Converter WebPYUV444Converters[MODE_LAST]; |
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extern void WebPInitYUV444ConvertersMIPSdspR2(void); |
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extern void WebPInitYUV444ConvertersSSE2(void); |
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static volatile VP8CPUInfo upsampling_last_cpuinfo_used1 = |
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(VP8CPUInfo)&upsampling_last_cpuinfo_used1; |
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WEBP_TSAN_IGNORE_FUNCTION void WebPInitYUV444Converters(void) { |
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if (upsampling_last_cpuinfo_used1 == VP8GetCPUInfo) return; |
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WebPYUV444Converters[MODE_RGB] = WebPYuv444ToRgbC; |
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WebPYUV444Converters[MODE_RGBA] = WebPYuv444ToRgbaC; |
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WebPYUV444Converters[MODE_BGR] = WebPYuv444ToBgrC; |
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WebPYUV444Converters[MODE_BGRA] = WebPYuv444ToBgraC; |
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WebPYUV444Converters[MODE_ARGB] = WebPYuv444ToArgbC; |
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WebPYUV444Converters[MODE_RGBA_4444] = WebPYuv444ToRgba4444C; |
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WebPYUV444Converters[MODE_RGB_565] = WebPYuv444ToRgb565C; |
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WebPYUV444Converters[MODE_rgbA] = WebPYuv444ToRgbaC; |
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WebPYUV444Converters[MODE_bgrA] = WebPYuv444ToBgraC; |
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WebPYUV444Converters[MODE_Argb] = WebPYuv444ToArgbC; |
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WebPYUV444Converters[MODE_rgbA_4444] = WebPYuv444ToRgba4444C; |
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if (VP8GetCPUInfo != NULL) { |
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#if defined(WEBP_USE_SSE2) |
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if (VP8GetCPUInfo(kSSE2)) { |
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WebPInitYUV444ConvertersSSE2(); |
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} |
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#endif |
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#if defined(WEBP_USE_MIPS_DSP_R2) |
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if (VP8GetCPUInfo(kMIPSdspR2)) { |
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WebPInitYUV444ConvertersMIPSdspR2(); |
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} |
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#endif |
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} |
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upsampling_last_cpuinfo_used1 = VP8GetCPUInfo; |
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} |
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//------------------------------------------------------------------------------ |
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// Main calls |
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extern void WebPInitUpsamplersSSE2(void); |
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extern void WebPInitUpsamplersNEON(void); |
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extern void WebPInitUpsamplersMIPSdspR2(void); |
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extern void WebPInitUpsamplersMSA(void); |
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static volatile VP8CPUInfo upsampling_last_cpuinfo_used2 = |
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(VP8CPUInfo)&upsampling_last_cpuinfo_used2; |
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WEBP_TSAN_IGNORE_FUNCTION void WebPInitUpsamplers(void) { |
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if (upsampling_last_cpuinfo_used2 == VP8GetCPUInfo) return; |
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#ifdef FANCY_UPSAMPLING |
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WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair; |
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WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair; |
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WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePair; |
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WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePair; |
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WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair; |
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WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair; |
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WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair; |
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WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair; |
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WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair; |
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WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair; |
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WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair; |
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// If defined, use CPUInfo() to overwrite some pointers with faster versions. |
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if (VP8GetCPUInfo != NULL) { |
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#if defined(WEBP_USE_SSE2) |
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if (VP8GetCPUInfo(kSSE2)) { |
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WebPInitUpsamplersSSE2(); |
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} |
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#endif |
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#if defined(WEBP_USE_NEON) |
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if (VP8GetCPUInfo(kNEON)) { |
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WebPInitUpsamplersNEON(); |
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} |
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#endif |
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#if defined(WEBP_USE_MIPS_DSP_R2) |
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if (VP8GetCPUInfo(kMIPSdspR2)) { |
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WebPInitUpsamplersMIPSdspR2(); |
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} |
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#endif |
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#if defined(WEBP_USE_MSA) |
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if (VP8GetCPUInfo(kMSA)) { |
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WebPInitUpsamplersMSA(); |
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} |
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#endif |
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} |
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#endif // FANCY_UPSAMPLING |
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upsampling_last_cpuinfo_used2 = VP8GetCPUInfo; |
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} |
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//------------------------------------------------------------------------------
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