[Libjpeg-turbo-users] tjCompressFromYUV

[Alessio A. <ale...@gm...>]

Hello,

may I ask a question about the tjCompressFromYUV() function?

I'd like to compress a planar 4:2:0 YUV buffer to a jpeg image, but
tjCompressFromYUV() fails, and the error string returned by tjGetErrorStr()
is "Bogus input colorspace".

What am I doing wrong?

Below is my code if it can help.

Thanks in advance,
Alessio

#define PADDING     2
tjhandle tjh;unsigned long buf_size;unsigned char *jpegBuf =
NULL;unsigned long jpegSize;int width = 352;int height = 288;int
quality = 70;unsigned char *ucp_frame;int j;FILE *fp = NULL;

ucp_frame = malloc(width * height * 3 / 2);if ( NULL == ucp_frame ) {
    printf("malloc error ucp_frame\n");
    return 0;}

fp = fopen("planar_352x288.raw", "rb");if( NULL == fp ) {
    printf("fopen error\n");
    return 0;}

j = fread( ucp_frame, 1, width * height * 3 / 2, fp);if( j != width *
height * 3 / 2 ) {
    printf("fread error\n");
    return 0;}
fclose(fp);

tjh = tjInitCompress();if( NULL == tjh ) {
    printf("tjInitCompress error '%s'\n",  tjGetErrorStr() );
    return 0;}

buf_size = tjBufSizeYUV2( width, PADDING, height, TJSAMP_420);
jpegBuf = tjAlloc(buf_size);
if( tjCompressFromYUV( tjh, ucp_frame, width, PADDING, height,
                       TJSAMP_420, &jpegBuf, &jpegSize, quality,
                       TJFLAG_NOREALLOC ) ) {
    printf("tjCompressFromYUV error '%s'\n",  tjGetErrorStr() );}