C++ (Cpp) InitYUVRescaler Examples

Example #1

File: io_dec.c Project: 93i/godot

static int CustomSetup(VP8Io* io) {
  WebPDecParams* const p = (WebPDecParams*)io->opaque;
  const WEBP_CSP_MODE colorspace = p->output->colorspace;
  const int is_rgb = WebPIsRGBMode(colorspace);
  const int is_alpha = WebPIsAlphaMode(colorspace);

  p->memory = NULL;
  p->emit = NULL;
  p->emit_alpha = NULL;
  p->emit_alpha_row = NULL;
  if (!WebPIoInitFromOptions(p->options, io, is_alpha ? MODE_YUV : MODE_YUVA)) {
    return 0;
  }
  if (is_alpha && WebPIsPremultipliedMode(colorspace)) {
    WebPInitUpsamplers();
  }
  if (io->use_scaling) {
#if !defined(WEBP_REDUCE_SIZE)
    const int ok = is_rgb ? InitRGBRescaler(io, p) : InitYUVRescaler(io, p);
    if (!ok) {
      return 0;    // memory error
    }
#else
    return 0;   // rescaling support not compiled
#endif
  } else {
    if (is_rgb) {
      WebPInitSamplers();
      p->emit = EmitSampledRGB;   // default
      if (io->fancy_upsampling) {
#ifdef FANCY_UPSAMPLING
        const int uv_width = (io->mb_w + 1) >> 1;
        p->memory = WebPSafeMalloc(1ULL, (size_t)(io->mb_w + 2 * uv_width));
        if (p->memory == NULL) {
          return 0;   // memory error.
        }
        p->tmp_y = (uint8_t*)p->memory;
        p->tmp_u = p->tmp_y + io->mb_w;
        p->tmp_v = p->tmp_u + uv_width;
        p->emit = EmitFancyRGB;
        WebPInitUpsamplers();
#endif
      }
    } else {
      p->emit = EmitYUV;
    }
    if (is_alpha) {  // need transparency output
      p->emit_alpha =
          (colorspace == MODE_RGBA_4444 || colorspace == MODE_rgbA_4444) ?
              EmitAlphaRGBA4444
          : is_rgb ? EmitAlphaRGB
          : EmitAlphaYUV;
      if (is_rgb) {
        WebPInitAlphaProcessing();
      }
    }
  }

Example #2

File: io.c Project: qtekfun/htcDesire820Kernel

static int CustomSetup(VP8Io* io) {
  WebPDecParams* const p = (WebPDecParams*)io->opaque;
  const WEBP_CSP_MODE colorspace = p->output->colorspace;
  const int is_rgb = WebPIsRGBMode(colorspace);
  const int is_alpha = WebPIsAlphaMode(colorspace);

  p->memory = NULL;
  p->emit = NULL;
  p->emit_alpha = NULL;
  p->emit_alpha_row = NULL;
  if (!WebPIoInitFromOptions(p->options, io, is_alpha ? MODE_YUV : MODE_YUVA)) {
    return 0;
  }

  if (io->use_scaling) {
    const int ok = is_rgb ? InitRGBRescaler(io, p) : InitYUVRescaler(io, p);
    if (!ok) {
      return 0;    
    }
  } else {
    if (is_rgb) {
      p->emit = EmitSampledRGB;   
#ifdef FANCY_UPSAMPLING
      if (io->fancy_upsampling) {
        const int uv_width = (io->mb_w + 1) >> 1;
        p->memory = malloc(io->mb_w + 2 * uv_width);
        if (p->memory == NULL) {
          return 0;   
        }
        p->tmp_y = (uint8_t*)p->memory;
        p->tmp_u = p->tmp_y + io->mb_w;
        p->tmp_v = p->tmp_u + uv_width;
        p->emit = EmitFancyRGB;
        WebPInitUpsamplers();
      }
#endif
    } else {
      p->emit = EmitYUV;
    }
    if (is_alpha) {  
      if (WebPIsPremultipliedMode(colorspace)) WebPInitPremultiply();
      p->emit_alpha =
          (colorspace == MODE_RGBA_4444 || colorspace == MODE_rgbA_4444) ?
              EmitAlphaRGBA4444
          : is_rgb ? EmitAlphaRGB
          : EmitAlphaYUV;
    }
  }

Example #3

File: io.c Project: soywiz/nwebp

static int CustomSetup(VP8Io* io) {
  WebPDecParams* const p = (WebPDecParams*)io->opaque;
  const int is_rgb = (p->output->colorspace < MODE_YUV);

  p->memory = NULL;
  p->emit = NULL;
  p->emit_alpha = NULL;
  if (!InitFromOptions(p->options, io)) {
    return 0;
  }

  if (io->use_scaling) {
    const int ok = is_rgb ? InitRGBRescaler(io, p) : InitYUVRescaler(io, p);
    if (!ok) {
      return 0;    // memory error
    }
  } else {
    if (is_rgb) {
      p->emit = EmitSampledRGB;   // default
#ifdef FANCY_UPSAMPLING
      if (io->fancy_upsampling) {
        const int uv_width = (io->mb_w + 1) >> 1;
        p->memory = malloc(io->mb_w + 2 * uv_width);
        if (p->memory == NULL) {
          return 0;   // memory error.
        }
        p->tmp_y = (uint8_t*)p->memory;
        p->tmp_u = p->tmp_y + io->mb_w;
        p->tmp_v = p->tmp_u + uv_width;
        p->emit = EmitFancyRGB;
        WebPInitUpsamplers();
      }
#endif
    } else {
      p->emit = EmitYUV;
    }
    if (IsAlphaMode(p->output->colorspace)) {
      // We need transparency output
      p->emit_alpha =
          is_rgb ? (p->output->colorspace == MODE_RGBA_4444 ?
              EmitAlphaRGBA4444 : EmitAlphaRGB) : EmitAlphaYUV;
    }
  }

Example #4

File: dec.io.c Project: Antranilan/Sparky

static int CustomSetup(VP8Io* io) {
  WebPDecParams* const p = (WebPDecParams*)io->opaque;
  const WEBP_CSP_MODE colorspace = p->output->colorspace;
  const int is_rgb = WebPIsRGBMode(colorspace);
  const int is_alpha = WebPIsAlphaMode(colorspace);

  p->memory = NULL;
  p->emit = NULL;
  p->emit_alpha = NULL;
  p->emit_alpha_row = NULL;
  if (!WebPIoInitFromOptions(p->options, io, is_alpha ? MODE_YUV : MODE_YUVA)) {
    return 0;
  }
  if (is_alpha && WebPIsPremultipliedMode(colorspace)) {
    WebPInitUpsamplers();
  }
  if (io->use_scaling) {
    const int ok = is_rgb ? InitRGBRescaler(io, p) : InitYUVRescaler(io, p);
    if (!ok) {
      return 0;    // memory error
    }
  } else {
    if (is_rgb) {
      p->emit = EmitSampledRGB;   // default
      if (io->fancy_upsampling) {
#ifdef FANCY_UPSAMPLING
        const int uv_width = (io->mb_w + 1) >> 1;
        p->memory = WebPSafeMalloc(1ULL, (size_t)(io->mb_w + 2 * uv_width));
        if (p->memory == NULL) {
          return 0;   // memory error.
        }
        p->tmp_y = (uint8_t*)p->memory;
        p->tmp_u = p->tmp_y + io->mb_w;
        p->tmp_v = p->tmp_u + uv_width;
        p->emit = EmitFancyRGB;
        WebPInitUpsamplers();
#endif
      } else {
        WebPInitSamplers();
      }
    } else {