static int save_rgb_buffer_as_ppm(const char *fn, unsigned char* data, int width,
int height, int stride, camera_frametype_t frameType)
{
int rc=0;
char header[256];
uint8_t *rgb_scanline=NULL;
int lenheader = snprintf(header, sizeof header, "P6\n%d %d\n255\n", width, height);
int fd = open(fn, O_RDWR|O_CREAT|O_TRUNC, 0660);
if (fd == -1) {
perror("save_vf_buffer()/open():");
rc = -1;
goto cleanup;
}
write(fd, header, lenheader);
rgb_scanline = (uint8_t*)malloc(3*width);
if (rgb_scanline == NULL) {
fprintf(stderr, "out of memory while allocating rgb_scanline\n");
rc = -1;
goto cleanup;
}
for (int i=0; i<height; i++) {
if (frameType == CAMERA_FRAMETYPE_RGB8888) {
bgra_to_rgb(rgb_scanline, data, width);
}
rc = write(fd, rgb_scanline, 3*width);
if (rc != 3*width) {
printf("%s(): write(%d) returns %d\n", __func__, width, rc);
break;
}
data += stride;
}
cleanup:
close(fd);
free(rgb_scanline);
return rc;
}
RGBator::RGBator(unsigned char *data, int width, int height, buffer_type buf_type) {
memory = (GifByteType *)malloc(sizeof(GifFileType)*width*height*3);
if (!memory) throw "malloc in RGBator::RGBator failed";
red = memory;
green = memory + width*height;
blue = memory + width*height*2;
switch (buf_type) {
case BUF_RGB:
rgb_to_rgb(data, width, height);
break;
case BUF_BGR:
bgr_to_rgb(data, width, height);
break;
case BUF_RGBA:
rgba_to_rgb(data, width, height);
break;
case BUF_BGRA:
bgra_to_rgb(data, width, height);
break;
default:
throw "Unexpected buf_type in RGBator::RGBator";
}
};
void
JpegEncoder::encode()
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
jpeg_mem_dest(&cinfo, &jpeg, &jpeg_len);
if (offset.isNull()) {
cinfo.image_width = width;
cinfo.image_height = height;
}
else {
cinfo.image_width = offset.w;
cinfo.image_height = offset.h;
}
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE);
cinfo.smoothing_factor = smoothing;
jpeg_start_compress(&cinfo, TRUE);
unsigned char *rgb_data;
switch (buf_type) {
case BUF_RGBA:
rgb_data = rgba_to_rgb(data, width*height*4);
if (!rgb_data) throw "malloc failed in JpegEncoder::encode/rgba_to_rgb.";
break;
case BUF_BGRA:
rgb_data = bgra_to_rgb(data, width*height*4);
if (!rgb_data) throw "malloc failed in JpegEncoder::encode/bgra_to_rgb.";
break;
case BUF_BGR:
rgb_data = bgr_to_rgb(data, width*height*3);
if (!rgb_data) throw "malloc failed in JpegEncoder::encode/bgr_to_rgb.";
break;
case BUF_RGB:
rgb_data = data;
break;
default:
throw "Unexpected buf_type in JpegEncoder::encode";
}
JSAMPROW row_pointer;
int start = 0;
if (!offset.isNull()) {
start = offset.y*width*3 + offset.x*3;
}
while (cinfo.next_scanline < cinfo.image_height) {
row_pointer = &rgb_data[start + cinfo.next_scanline*3*width];
jpeg_write_scanlines(&cinfo, &row_pointer, 1);
}
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
if (buf_type == BUF_BGR || buf_type == BUF_RGBA || buf_type == BUF_BGRA)
free(rgb_data);
}