C++ (Cpp) DecodeInto Examples

Example #1

File: webp.c Project: ZW19911104/libwebp

static uint8_t* Decode(WEBP_CSP_MODE mode, const uint8_t* const data,
                       size_t data_size, int* const width, int* const height,
                       WebPDecBuffer* const keep_info) {
  WebPDecParams params;
  WebPDecBuffer output;

  WebPInitDecBuffer(&output);
  WebPResetDecParams(&params);
  params.output = &output;
  output.colorspace = mode;

  // Retrieve (and report back) the required dimensions from bitstream.
  if (!WebPGetInfo(data, data_size, &output.width, &output.height)) {
    return NULL;
  }
  if (width != NULL) *width = output.width;
  if (height != NULL) *height = output.height;

  // Decode
  if (DecodeInto(data, data_size, &params) != VP8_STATUS_OK) {
    return NULL;
  }
  if (keep_info != NULL) {    // keep track of the side-info
    WebPCopyDecBuffer(&output, keep_info);
  }
  // return decoded samples (don't clear 'output'!)
  return WebPIsRGBMode(mode) ? output.u.RGBA.rgba : output.u.YUVA.y;
}

Example #2

File: webp.c Project: ZW19911104/libwebp

uint8_t* WebPDecodeYUVInto(const uint8_t* data, size_t data_size,
                           uint8_t* luma, size_t luma_size, int luma_stride,
                           uint8_t* u, size_t u_size, int u_stride,
                           uint8_t* v, size_t v_size, int v_stride) {
  WebPDecParams params;
  WebPDecBuffer output;
  if (luma == NULL) return NULL;
  WebPInitDecBuffer(&output);
  WebPResetDecParams(&params);
  params.output = &output;
  output.colorspace      = MODE_YUV;
  output.u.YUVA.y        = luma;
  output.u.YUVA.y_stride = luma_stride;
  output.u.YUVA.y_size   = luma_size;
  output.u.YUVA.u        = u;
  output.u.YUVA.u_stride = u_stride;
  output.u.YUVA.u_size   = u_size;
  output.u.YUVA.v        = v;
  output.u.YUVA.v_stride = v_stride;
  output.u.YUVA.v_size   = v_size;
  output.is_external_memory = 1;
  if (DecodeInto(data, data_size, &params) != VP8_STATUS_OK) {
    return NULL;
  }
  return luma;
}

Example #3

File: webp.c Project: qtekfun/htcDesire820Kernel

static uint8_t* Decode(WEBP_CSP_MODE mode, const uint8_t* const data,
                       size_t data_size, int* const width, int* const height,
                       WebPDecBuffer* const keep_info) {
  WebPDecParams params;
  WebPDecBuffer output;

  WebPInitDecBuffer(&output);
  WebPResetDecParams(&params);
  params.output = &output;
  output.colorspace = mode;

  
  if (!WebPGetInfo(data, data_size, &output.width, &output.height)) {
    return NULL;
  }
  if (width != NULL) *width = output.width;
  if (height != NULL) *height = output.height;

  
  if (DecodeInto(data, data_size, &params) != VP8_STATUS_OK) {
    return NULL;
  }
  if (keep_info != NULL) {    
    WebPCopyDecBuffer(&output, keep_info);
  }
  
  return WebPIsRGBMode(mode) ? output.u.RGBA.rgba : output.u.YUVA.y;
}

Example #4

File: webp.c Project: ZW19911104/libwebp

VP8StatusCode WebPDecode(const uint8_t* data, size_t data_size,
                         WebPDecoderConfig* config) {
  WebPDecParams params;
  VP8StatusCode status;

  if (config == NULL) {
    return VP8_STATUS_INVALID_PARAM;
  }

  status = GetFeatures(data, data_size, &config->input);
  if (status != VP8_STATUS_OK) {
    if (status == VP8_STATUS_NOT_ENOUGH_DATA) {
      return VP8_STATUS_BITSTREAM_ERROR;  // Not-enough-data treated as error.
    }
    return status;
  }

  WebPResetDecParams(&params);
  params.options = &config->options;
  params.output = &config->output;
  if (WebPAvoidSlowMemory(params.output, &config->input)) {
    // decoding to slow memory: use a temporary in-mem buffer to decode into.
    WebPDecBuffer in_mem_buffer;
    WebPInitDecBuffer(&in_mem_buffer);
    in_mem_buffer.colorspace = config->output.colorspace;
    in_mem_buffer.width = config->input.width;
    in_mem_buffer.height = config->input.height;
    params.output = &in_mem_buffer;
    status = DecodeInto(data, data_size, &params);
    if (status == VP8_STATUS_OK) {  // do the slow-copy
      status = WebPCopyDecBufferPixels(&in_mem_buffer, &config->output);
    }
    WebPFreeDecBuffer(&in_mem_buffer);
  } else {
    status = DecodeInto(data, data_size, &params);
  }

  return status;
}

Example #5

File: webp.c Project: ZW19911104/libwebp

// Helpers
static uint8_t* DecodeIntoRGBABuffer(WEBP_CSP_MODE colorspace,
                                     const uint8_t* const data,
                                     size_t data_size,
                                     uint8_t* const rgba,
                                     int stride, size_t size) {
  WebPDecParams params;
  WebPDecBuffer buf;
  if (rgba == NULL) {
    return NULL;
  }
  WebPInitDecBuffer(&buf);
  WebPResetDecParams(&params);
  params.output = &buf;
  buf.colorspace    = colorspace;
  buf.u.RGBA.rgba   = rgba;
  buf.u.RGBA.stride = stride;
  buf.u.RGBA.size   = size;
  buf.is_external_memory = 1;
  if (DecodeInto(data, data_size, &params) != VP8_STATUS_OK) {
    return NULL;
  }
  return rgba;
}

Example #6

File: webp.c Project: JAOSP/aosp_platform_external_chromium_org

VP8StatusCode WebPDecode(const uint8_t* data, size_t data_size,
                         WebPDecoderConfig* config) {
  WebPDecParams params;
  VP8StatusCode status;

  if (config == NULL) {
    return VP8_STATUS_INVALID_PARAM;
  }

  status = GetFeatures(data, data_size, &config->input);
  if (status != VP8_STATUS_OK) {
    if (status == VP8_STATUS_NOT_ENOUGH_DATA) {
      return VP8_STATUS_BITSTREAM_ERROR;  // Not-enough-data treated as error.
    }
    return status;
  }

  WebPResetDecParams(&params);
  params.output = &config->output;
  params.options = &config->options;
  status = DecodeInto(data, data_size, &params);

  return status;
}