static void check_and_compress_jpeg(int quality, unsigned char *outbuf, const unsigned char *inbuf,
int width, int height, int bufsize)
{
/* JPEG's are always multiples of 16, extra is ignored in AVI's */
if ((width & 0xF) || (height & 0xF)) {
int i, rrowstride, jrowstride;
int jwidth = PADUP(width, 16);
int jheight = PADUP(height, 16);
unsigned char *tmpbuf = MEM_mallocN(jwidth * jheight * 3, "avi.check_and_compress_jpeg");
/* resize the realbuf into the tmpbuf */
rrowstride = width * 3;
jrowstride = jwidth * 3;
for (i = 0; i < jheight; i++) {
if (i < height)
memcpy(&tmpbuf[i * jrowstride], &inbuf[i * rrowstride], rrowstride);
else
memset(&tmpbuf[i * jrowstride], 0, rrowstride);
memset(&tmpbuf[i * jrowstride + rrowstride], 0, jrowstride - rrowstride);
}
Compress_JPEG(quality, outbuf, tmpbuf, jwidth, jheight, bufsize);
MEM_freeN(tmpbuf);
}
else {
Compress_JPEG(quality, outbuf, inbuf, width, height, bufsize);
}
}
void *avi_converter_to_mjpeg(AviMovie *movie, int stream, unsigned char *buffer, size_t *size)
{
unsigned char *buf;
size_t bufsize = *size;
numbytes = 0;
*size = 0;
buf = imb_alloc_pixels(movie->header->Height, movie->header->Width, 3, sizeof(unsigned char), "avi.avi_converter_to_mjpeg 1");
if (!buf) {
return NULL;
}
if (!movie->interlace) {
Compress_JPEG(movie->streams[stream].sh.Quality / 100,
buf, buffer,
movie->header->Width,
movie->header->Height,
bufsize);
*size += numbytes;
}
else {
deinterlace(movie->odd_fields, buf, buffer, movie->header->Width, movie->header->Height);
MEM_freeN(buffer);
buffer = buf;
buf = imb_alloc_pixels(movie->header->Height, movie->header->Width, 3, sizeof(unsigned char), "avi.avi_converter_to_mjpeg 1");
if (buf) {
Compress_JPEG(movie->streams[stream].sh.Quality / 100,
buf, buffer,
movie->header->Width,
movie->header->Height / 2,
bufsize / 2);
*size += numbytes;
numbytes = 0;
Compress_JPEG(movie->streams[stream].sh.Quality / 100,
buf + *size, buffer + (size_t)(movie->header->Height / 2) * (size_t)movie->header->Width * 3,
movie->header->Width,
movie->header->Height / 2,
bufsize / 2);
*size += numbytes;
}
}
MEM_freeN(buffer);
return buf;
}
void *avi_converter_to_mjpeg(AviMovie *movie, int stream, unsigned char *buffer, int *size)
{
unsigned char *buf;
int bufsize = *size;
numbytes = 0;
*size = 0;
buf = MEM_mallocN(movie->header->Height * movie->header->Width * 3, "avi.avi_converter_to_mjpeg 1");
if (!movie->interlace) {
Compress_JPEG(movie->streams[stream].sh.Quality / 100,
buf, buffer,
movie->header->Width,
movie->header->Height,
bufsize);
}
else {
deinterlace(movie->odd_fields, buf, buffer, movie->header->Width, movie->header->Height);
MEM_freeN(buffer);
buffer = buf;
buf = MEM_mallocN(movie->header->Height * movie->header->Width * 3, "avi.avi_converter_to_mjpeg 2");
Compress_JPEG(movie->streams[stream].sh.Quality / 100,
buf, buffer,
movie->header->Width,
movie->header->Height / 2,
bufsize / 2);
*size += numbytes;
numbytes = 0;
Compress_JPEG(movie->streams[stream].sh.Quality / 100,
buf + *size, buffer + (movie->header->Height / 2) * movie->header->Width * 3,
movie->header->Width,
movie->header->Height / 2,
bufsize / 2);
}
*size += numbytes;
MEM_freeN(buffer);
return buf;
}
