mirror of
https://github.com/webmproject/libwebp.git
synced 2024-12-27 06:08:21 +01:00
Merge "revamp the point-sampling functions by processing a full plane"
This commit is contained in:
Pascal Massimino
Gerrit Code Review
commit
ab9f2f8685
28
src/dec/io.c
28
src/dec/io.c
@ -45,27 +45,12 @@ static int EmitYUV(const VP8Io* const io, WebPDecParams* const p) {
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// Point-sampling U/V sampler.
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static int EmitSampledRGB(const VP8Io* const io, WebPDecParams* const p) {
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WebPDecBuffer* output = p->output;
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const WebPRGBABuffer* const buf = &output->u.RGBA;
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uint8_t* dst = buf->rgba + io->mb_y * buf->stride;
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const uint8_t* y_src = io->y;
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const uint8_t* u_src = io->u;
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const uint8_t* v_src = io->v;
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const WebPSampleLinePairFunc sample = WebPSamplers[output->colorspace];
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const int mb_w = io->mb_w;
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const int last = io->mb_h - 1;
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int j;
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for (j = 0; j < last; j += 2) {
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sample(y_src, y_src + io->y_stride, u_src, v_src,
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dst, dst + buf->stride, mb_w);
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y_src += 2 * io->y_stride;
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u_src += io->uv_stride;
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v_src += io->uv_stride;
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dst += 2 * buf->stride;
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}
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if (j == last) { // Just do the last line twice
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sample(y_src, y_src, u_src, v_src, dst, dst, mb_w);
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}
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WebPDecBuffer* const output = p->output;
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WebPRGBABuffer* const buf = &output->u.RGBA;
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uint8_t* const dst = buf->rgba + io->mb_y * buf->stride;
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WebPSamplers[output->colorspace](io->y, io->y_stride,
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io->u, io->v, io->uv_stride,
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dst, buf->stride, io->mb_w, io->mb_h);
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return io->mb_h;
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}
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@ -637,4 +622,3 @@ void WebPInitCustomIo(WebPDecParams* const params, VP8Io* const io) {
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}
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//------------------------------------------------------------------------------
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@ -195,13 +195,23 @@ void WebPInitUpsamplersNEON(void);
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#endif // FANCY_UPSAMPLING
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// Point-sampling methods.
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typedef void (*WebPSampleLinePairFunc)(
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const uint8_t* top_y, const uint8_t* bottom_y,
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const uint8_t* u, const uint8_t* v,
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uint8_t* top_dst, uint8_t* bottom_dst, int len);
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typedef void (*WebPSamplePlaneFunc)(const uint8_t* y, int y_stride,
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const uint8_t* u, const uint8_t* v,
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int uv_stride,
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uint8_t* dst, int dst_stride,
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int width, int height);
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typedef void (*WebPSamplerRowFunc)(const uint8_t* y,
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const uint8_t* u, const uint8_t* v,
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uint8_t* dst, int len);
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// Generic function to apply 'WebPSamplerRowFunc' to the whole plane:
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void WebPSamplerProcessPlane(const uint8_t* y, int y_stride,
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const uint8_t* u, const uint8_t* v, int uv_stride,
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uint8_t* dst, int dst_stride,
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int width, int height, WebPSamplerRowFunc func);
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// Sampling functions to convert YUV to RGB(A) modes
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extern WebPSampleLinePairFunc WebPSamplers[/* MODE_LAST */];
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extern WebPSamplePlaneFunc WebPSamplers[/* MODE_LAST */];
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// Initializes MIPS version of the samplers.
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void WebPInitSamplersMIPS32(void);
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@ -109,40 +109,59 @@ UPSAMPLE_FUNC(UpsampleRgb565LinePair, VP8YuvToRgb565, 2)
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//------------------------------------------------------------------------------
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// simple point-sampling
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WebPSamplePlaneFunc WebPSamplers[MODE_LAST];
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WebPSampleLinePairFunc WebPSamplers[MODE_LAST];
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void WebPSamplerProcessPlane(const uint8_t* y, int y_stride,
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const uint8_t* u, const uint8_t* v, int uv_stride,
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uint8_t* dst, int dst_stride,
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int width, int height, WebPSamplerRowFunc func) {
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int j;
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for (j = 0; j < height; ++j) {
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func(y, u, v, dst, width);
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y += y_stride;
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if (j & 1) {
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u += uv_stride;
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v += uv_stride;
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}
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dst += dst_stride;
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}
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}
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// TODO(skal): maybe some of these per-row functions should be in yuv.h?
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#define SAMPLE_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* u, const uint8_t* v, \
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uint8_t* top_dst, uint8_t* bottom_dst, int len) { \
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int i; \
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for (i = 0; i < len - 1; i += 2) { \
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FUNC(top_y[0], u[0], v[0], top_dst); \
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FUNC(top_y[1], u[0], v[0], top_dst + XSTEP); \
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FUNC(bottom_y[0], u[0], v[0], bottom_dst); \
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FUNC(bottom_y[1], u[0], v[0], bottom_dst + XSTEP); \
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top_y += 2; \
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bottom_y += 2; \
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u++; \
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v++; \
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top_dst += 2 * XSTEP; \
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bottom_dst += 2 * XSTEP; \
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static void FUNC_NAME##Row(const uint8_t* y, \
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const uint8_t* u, const uint8_t* v, \
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uint8_t* dst, int len) { \
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const uint8_t* const end = dst + (len & ~1) * XSTEP; \
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while (dst != end) { \
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FUNC(y[0], u[0], v[0], dst); \
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FUNC(y[1], u[0], v[0], dst + XSTEP); \
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y += 2; \
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++u; \
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++v; \
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dst += 2 * XSTEP; \
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} \
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if (i == len - 1) { /* last one */ \
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FUNC(top_y[0], u[0], v[0], top_dst); \
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FUNC(bottom_y[0], u[0], v[0], bottom_dst); \
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if (len & 1) { \
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FUNC(y[0], u[0], v[0], dst); \
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} \
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} \
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static void FUNC_NAME(const uint8_t* y, int y_stride, \
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const uint8_t* u, const uint8_t* v, int uv_stride, \
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uint8_t* dst, int dst_stride, \
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int width, int height) { \
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WebPSamplerProcessPlane(y, y_stride, u, v, uv_stride, \
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dst, dst_stride, width, height, \
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FUNC_NAME##Row); \
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}
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// All variants implemented.
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SAMPLE_FUNC(SampleRgbLinePair, VP8YuvToRgb, 3)
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SAMPLE_FUNC(SampleBgrLinePair, VP8YuvToBgr, 3)
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SAMPLE_FUNC(SampleRgbaLinePair, VP8YuvToRgba, 4)
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SAMPLE_FUNC(SampleBgraLinePair, VP8YuvToBgra, 4)
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SAMPLE_FUNC(SampleArgbLinePair, VP8YuvToArgb, 4)
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SAMPLE_FUNC(SampleRgba4444LinePair, VP8YuvToRgba4444, 2)
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SAMPLE_FUNC(SampleRgb565LinePair, VP8YuvToRgb565, 2)
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SAMPLE_FUNC(SampleRgbPlane, VP8YuvToRgb, 3)
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SAMPLE_FUNC(SampleBgrPlane, VP8YuvToBgr, 3)
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SAMPLE_FUNC(SampleRgbaPlane, VP8YuvToRgba, 4)
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SAMPLE_FUNC(SampleBgraPlane, VP8YuvToBgra, 4)
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SAMPLE_FUNC(SampleArgbPlane, VP8YuvToArgb, 4)
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SAMPLE_FUNC(SampleRgba4444Plane, VP8YuvToRgba4444, 2)
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SAMPLE_FUNC(SampleRgb565Plane, VP8YuvToRgb565, 2)
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#undef SAMPLE_FUNC
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@ -341,17 +360,17 @@ void WebPInitUpsamplers(void) {
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}
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void WebPInitSamplers(void) {
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WebPSamplers[MODE_RGB] = SampleRgbLinePair;
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WebPSamplers[MODE_RGBA] = SampleRgbaLinePair;
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WebPSamplers[MODE_BGR] = SampleBgrLinePair;
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WebPSamplers[MODE_BGRA] = SampleBgraLinePair;
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WebPSamplers[MODE_ARGB] = SampleArgbLinePair;
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WebPSamplers[MODE_RGBA_4444] = SampleRgba4444LinePair;
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WebPSamplers[MODE_RGB_565] = SampleRgb565LinePair;
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WebPSamplers[MODE_rgbA] = SampleRgbaLinePair;
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WebPSamplers[MODE_bgrA] = SampleBgraLinePair;
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WebPSamplers[MODE_Argb] = SampleArgbLinePair;
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WebPSamplers[MODE_rgbA_4444] = SampleRgba4444LinePair;
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WebPSamplers[MODE_RGB] = SampleRgbPlane;
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WebPSamplers[MODE_RGBA] = SampleRgbaPlane;
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WebPSamplers[MODE_BGR] = SampleBgrPlane;
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WebPSamplers[MODE_BGRA] = SampleBgraPlane;
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WebPSamplers[MODE_ARGB] = SampleArgbPlane;
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WebPSamplers[MODE_RGBA_4444] = SampleRgba4444Plane;
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WebPSamplers[MODE_RGB_565] = SampleRgb565Plane;
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WebPSamplers[MODE_rgbA] = SampleRgbaPlane;
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WebPSamplers[MODE_bgrA] = SampleBgraPlane;
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WebPSamplers[MODE_Argb] = SampleArgbPlane;
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WebPSamplers[MODE_rgbA_4444] = SampleRgba4444Plane;
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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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@ -387,4 +406,3 @@ void WebPInitPremultiply(void) {
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}
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#endif // FANCY_UPSAMPLING
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}
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@ -22,9 +22,9 @@
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// simple point-sampling
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#define SAMPLE_FUNC_MIPS(FUNC_NAME, XSTEP, R, G, B, A) \
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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* u, const uint8_t* v, \
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uint8_t* top_dst, uint8_t* bottom_dst, int len) { \
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static void FUNC_NAME##Row(const uint8_t* y, \
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const uint8_t* u, const uint8_t* v, \
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uint8_t* dst, int len) { \
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int i, r, g, b; \
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int temp0, temp1, temp2, temp3, temp4; \
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for (i = 0; i < (len >> 1); i++) { \
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@ -32,7 +32,7 @@ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \
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temp3 = kVToG * v[0]; \
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temp2 = kUToG * u[0]; \
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temp4 = kUToB * u[0]; \
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temp0 = kYScale * top_y[0]; \
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temp0 = kYScale * y[0]; \
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temp1 += kRCst; \
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temp3 -= kGCst; \
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temp2 += temp3; \
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@ -40,47 +40,29 @@ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \
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r = VP8Clip8(temp0 + temp1); \
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g = VP8Clip8(temp0 - temp2); \
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b = VP8Clip8(temp0 + temp4); \
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temp0 = kYScale * top_y[1]; \
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top_dst[R] = r; \
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top_dst[G] = g; \
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top_dst[B] = b; \
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if (A) top_dst[A] = 0xff; \
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temp0 = kYScale * y[1]; \
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dst[R] = r; \
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dst[G] = g; \
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dst[B] = b; \
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if (A) dst[A] = 0xff; \
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r = VP8Clip8(temp0 + temp1); \
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g = VP8Clip8(temp0 - temp2); \
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b = VP8Clip8(temp0 + temp4); \
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temp0 = kYScale * bottom_y[0]; \
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top_dst[R + XSTEP] = r; \
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top_dst[G + XSTEP] = g; \
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top_dst[B + XSTEP] = b; \
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if (A) top_dst[A + XSTEP] = 0xff; \
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r = VP8Clip8(temp0 + temp1); \
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g = VP8Clip8(temp0 - temp2); \
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b = VP8Clip8(temp0 + temp4); \
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temp0 = kYScale * bottom_y[1]; \
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bottom_dst[R] = r; \
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bottom_dst[G] = g; \
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bottom_dst[B] = b; \
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if (A) bottom_dst[A] = 0xff; \
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r = VP8Clip8(temp0 + temp1); \
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g = VP8Clip8(temp0 - temp2); \
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b = VP8Clip8(temp0 + temp4); \
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bottom_dst[R + XSTEP] = r; \
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bottom_dst[G + XSTEP] = g; \
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bottom_dst[B + XSTEP] = b; \
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if (A) bottom_dst[A + XSTEP] = 0xff; \
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top_y += 2; \
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bottom_y += 2; \
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u++; \
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v++; \
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top_dst += 2 * XSTEP; \
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bottom_dst += 2 * XSTEP; \
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dst[R + XSTEP] = r; \
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dst[G + XSTEP] = g; \
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dst[B + XSTEP] = b; \
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if (A) dst[A + XSTEP] = 0xff; \
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y += 2; \
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++u; \
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++v; \
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dst += 2 * XSTEP; \
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} \
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if (len & 1) { \
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temp1 = kVToR * v[0]; \
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temp3 = kVToG * v[0]; \
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temp2 = kUToG * u[0]; \
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temp4 = kUToB * u[0]; \
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temp0 = kYScale * top_y[0]; \
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temp0 = kYScale * y[0]; \
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temp1 += kRCst; \
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temp3 -= kGCst; \
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temp2 += temp3; \
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@ -88,25 +70,25 @@ static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \
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r = VP8Clip8(temp0 + temp1); \
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g = VP8Clip8(temp0 - temp2); \
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b = VP8Clip8(temp0 + temp4); \
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temp0 = kYScale * bottom_y[0]; \
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top_dst[R] = r; \
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top_dst[G] = g; \
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top_dst[B] = b; \
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if (A) top_dst[A] = 0xff; \
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r = VP8Clip8(temp0 + temp1); \
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g = VP8Clip8(temp0 - temp2); \
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b = VP8Clip8(temp0 + temp4); \
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bottom_dst[R] = r; \
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bottom_dst[G] = g; \
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bottom_dst[B] = b; \
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if (A) bottom_dst[A] = 0xff; \
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dst[R] = r; \
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dst[G] = g; \
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dst[B] = b; \
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if (A) dst[A] = 0xff; \
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} \
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} \
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static void FUNC_NAME(const uint8_t* y, int y_stride, \
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const uint8_t* u, const uint8_t* v, int uv_stride, \
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uint8_t* dst, int dst_stride, \
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int width, int height) { \
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WebPSamplerProcessPlane(y, y_stride, u, v, uv_stride, \
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dst, dst_stride, width, height, \
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FUNC_NAME##Row); \
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}
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SAMPLE_FUNC_MIPS(SampleRgbLinePair, 3, 0, 1, 2, 0)
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SAMPLE_FUNC_MIPS(SampleRgbaLinePair, 4, 0, 1, 2, 3)
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SAMPLE_FUNC_MIPS(SampleBgrLinePair, 3, 2, 1, 0, 0)
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SAMPLE_FUNC_MIPS(SampleBgraLinePair, 4, 2, 1, 0, 3)
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SAMPLE_FUNC_MIPS(SampleRgbPlane, 3, 0, 1, 2, 0)
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SAMPLE_FUNC_MIPS(SampleRgbaPlane, 4, 0, 1, 2, 3)
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SAMPLE_FUNC_MIPS(SampleBgrPlane, 3, 2, 1, 0, 0)
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SAMPLE_FUNC_MIPS(SampleBgraPlane, 4, 2, 1, 0, 3)
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#endif // WEBP_USE_MIPS32
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@ -114,9 +96,9 @@ SAMPLE_FUNC_MIPS(SampleBgraLinePair, 4, 2, 1, 0, 3)
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void WebPInitSamplersMIPS32(void) {
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#if defined(WEBP_USE_MIPS32)
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WebPSamplers[MODE_RGB] = SampleRgbLinePair;
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WebPSamplers[MODE_RGBA] = SampleRgbaLinePair;
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WebPSamplers[MODE_BGR] = SampleBgrLinePair;
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WebPSamplers[MODE_BGRA] = SampleBgraLinePair;
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WebPSamplers[MODE_RGB] = SampleRgbPlane;
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WebPSamplers[MODE_RGBA] = SampleRgbaPlane;
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WebPSamplers[MODE_BGR] = SampleBgrPlane;
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WebPSamplers[MODE_BGRA] = SampleBgraPlane;
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#endif // WEBP_USE_MIPS32
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}
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