/*
* param dst : destination buffer
* param dst_size : maximum size of the dst buffer
* param src : source buffer
* param src_size : size of the image in the src buffer
* returns : the total size of the image
*
*/
size_t copy_frame(unsigned char *dst, const size_t dst_size, unsigned char *src, const size_t src_size) {
unsigned char *ptcur;
size_t sizein, pos = 0;
if (!is_huffman(src)) {
// Look for where Start of Frame (Baseline DCT) goes
for (ptcur = src; (ptcur - src) < dst_size; ptcur++) {
if (((ptcur[0] << 8) | ptcur[1]) == 0xffc0) {
break;
}
}
// If the supplied destination buffer is too small to fit this image, fail.
if (ptcur - src >= dst_size)
return 0;
sizein = ptcur - src;
memcpy(dst, src, sizein);
pos += sizein;
memcpy(dst + pos, dht_data, sizeof(dht_data));
pos += sizeof(dht_data);
memcpy(dst + pos, ptcur, src_size - sizein);
pos += src_size - sizein;
} else {
memcpy(dst, src, src_size);
pos += src_size;
}
return pos;
}
/******************************************************************************
Description.:
Input Value.:
Return Value:
******************************************************************************/
int memcpy_picture(unsigned char *out, unsigned char *buf, int size)
{
unsigned char *ptdeb, *ptlimit, *ptcur = buf;
int sizein, pos=0;
if (!is_huffman(buf)) {
ptdeb = ptcur = buf;
ptlimit = buf + size;
while ((((ptcur[0] << 8) | ptcur[1]) != 0xffc0) && (ptcur < ptlimit))
ptcur++;
if (ptcur >= ptlimit)
return pos;
sizein = ptcur - ptdeb;
memcpy(out+pos, buf, sizein); pos += sizein;
memcpy(out+pos, dht_data, sizeof(dht_data)); pos += sizeof(dht_data);
memcpy(out+pos, ptcur, size - sizein); pos += size-sizein;
} else {
memcpy(out+pos, ptcur, size); pos += size;
}
return pos;
}
int memcpy_picture(unsigned char *out, unsigned char *buf, int size)
{
// video 장치 공유 문제(opecv + mjpg)와 해상도에 따른 성능 문제로 인해
// opencv 해상도(800*600)와 stream(160*120) 해상도 변경
{
if(!g_fp)
{
g_fp = fopen("/dev/shm/picam.jpg", "wb");
if(!g_fp) exit(1);
}
int fd = fileno(g_fp);
while(1)
{
if(flock(fd, LOCK_EX) < 0)
{
if(errno == EINTR)
continue;
}
break;
}
fseek(g_fp, 0, SEEK_SET);
fwrite(buf, sizeof(unsigned char), size, g_fp);
fflush(g_fp);
while(1)
{
if(flock(fd, LOCK_UN) < 0)
{
if(errno == EINTR)
continue;
}
break;
}
/*
// 캡쳐된 원본은 object detection에 사용
FILE* fp = fopen("/dev/shm/picam.jpg", "wb");
if(fp)
{
fwrite(buf, sizeof(unsigned char), size, fp);
fclose(fp);
}
*/
// 스케일된 이미지는 스트리밍에 사용
// 이미지 스케일링은 output_http에서 하도록 변경
#if 0
CvMat cm = cvMat(1, size, CV_8UC1, buf);
IplImage* src = cvDecodeImage(&cm, CV_LOAD_IMAGE_COLOR);
if(!src) return 0;
IplImage* dst = cvCreateImage(cvSize(320, 240), src->depth, src->nChannels);
if(!dst) return 0;
cvResize(src, dst, CV_INTER_LINEAR);
//cvSaveImage("/dev/shm/small.jpg", dst, 0);
CvMat* enc = cvEncodeImage(".jpg", dst, 0);
if(!enc) return 0;
printf("#1 buf=%p, size=%d\n", buf, size);
printf("enc->data.ptr=%p, enc->rows=%d, enc->cols=%d\n", enc->data.ptr, enc->rows, enc->cols);
memcpy(buf, enc->data.ptr, enc->rows * enc->cols);
size = enc->rows * enc->cols;
printf("#2 buf=%p, size_%d\n", buf, size);
cvReleaseMat(&enc);
cvReleaseImage(&dst);
cvReleaseImage(&src);
#endif
}
unsigned char *ptdeb, *ptlimit, *ptcur = buf;
int sizein, pos = 0;
if(!is_huffman(buf)) {
ptdeb = ptcur = buf;
ptlimit = buf + size;
while((((ptcur[0] << 8) | ptcur[1]) != 0xffc0) && (ptcur < ptlimit))
ptcur++;
if(ptcur >= ptlimit)
return pos;
sizein = ptcur - ptdeb;
memcpy(out + pos, buf, sizein); pos += sizein;
memcpy(out + pos, dht_data, sizeof(dht_data)); pos += sizeof(dht_data);
memcpy(out + pos, ptcur, size - sizein); pos += size - sizein;
} else {
memcpy(out + pos, ptcur, size); pos += size;
}
return pos;
}