bool WebPEncoder::write(const Mat& img, const std::vector<int>& params)
{
int channels = img.channels(), depth = img.depth();
int width = img.cols, height = img.rows;
const Mat *image = &img;
Mat temp;
size_t size = 0;
bool comp_lossless = true;
float quality = 100.0f;
if (params.size() > 1)
{
if (params[0] == CV_IMWRITE_WEBP_QUALITY)
{
comp_lossless = false;
quality = static_cast<float>(params[1]);
if (quality < 1.0f)
{
quality = 1.0f;
}
if (quality > 100.0f)
{
comp_lossless = true;
}
}
}
uint8_t *out = NULL;
if(depth != CV_8U)
{
return false;
}
if(channels == 1)
{
cvtColor(*image, temp, CV_GRAY2BGR);
image = &temp;
channels = 3;
}
else if (channels == 2)
{
return false;
}
if (comp_lossless)
{
if(channels == 3)
{
size = WebPEncodeLosslessBGR(image->data, width, height, image->step, &out);
}
else if(channels == 4)
{
size = WebPEncodeLosslessBGRA(image->data, width, height, image->step, &out);
}
}
else
{
if(channels == 3)
{
size = WebPEncodeBGR(image->data, width, height, image->step, quality, &out);
}
else if(channels == 4)
{
size = WebPEncodeBGRA(image->data, width, height, image->step, quality, &out);
}
}
if(size > 0)
{
if(m_buf)
{
m_buf->resize(size);
memcpy(&(*m_buf)[0], out, size);
}
else
{
FILE *fd = fopen(m_filename.c_str(), "wb");
if(fd != NULL)
{
fwrite(out, size, sizeof(uint8_t), fd);
fclose(fd); fd = NULL;
}
}
}
if (out != NULL)
{
free(out);
out = NULL;
}
return size > 0;
}
bool WebPEncoder::write(const Mat& img, const std::vector<int>& params)
{
CV_CheckDepthEQ(img.depth(), CV_8U, "WebP codec supports 8U images only");
const int width = img.cols, height = img.rows;
bool comp_lossless = true;
float quality = 100.0f;
if (params.size() > 1)
{
if (params[0] == CV_IMWRITE_WEBP_QUALITY)
{
comp_lossless = false;
quality = static_cast<float>(params[1]);
if (quality < 1.0f)
{
quality = 1.0f;
}
if (quality > 100.0f)
{
comp_lossless = true;
}
}
}
int channels = img.channels();
CV_Check(channels, channels == 1 || channels == 3 || channels == 4, "");
const Mat *image = &img;
Mat temp;
if (channels == 1)
{
cvtColor(*image, temp, COLOR_GRAY2BGR);
image = &temp;
channels = 3;
}
uint8_t *out = NULL;
size_t size = 0;
if (comp_lossless)
{
if (channels == 3)
{
size = WebPEncodeLosslessBGR(image->ptr(), width, height, (int)image->step, &out);
}
else if (channels == 4)
{
size = WebPEncodeLosslessBGRA(image->ptr(), width, height, (int)image->step, &out);
}
}
else
{
if (channels == 3)
{
size = WebPEncodeBGR(image->ptr(), width, height, (int)image->step, quality, &out);
}
else if (channels == 4)
{
size = WebPEncodeBGRA(image->ptr(), width, height, (int)image->step, quality, &out);
}
}
#if WEBP_DECODER_ABI_VERSION >= 0x0206
Ptr<uint8_t> out_cleaner(out, WebPFree);
#else
Ptr<uint8_t> out_cleaner(out, free);
#endif
CV_Assert(size > 0);
if (m_buf)
{
m_buf->resize(size);
memcpy(&(*m_buf)[0], out, size);
}
else
{
FILE *fd = fopen(m_filename.c_str(), "wb");
if (fd != NULL)
{
fwrite(out, size, sizeof(uint8_t), fd);
fclose(fd); fd = NULL;
}
}
return size > 0;
}
