int JPEGDecoder::decode_mcu(void){
status = pjpeg_decode_mcu();
if (status)
{
is_available = 0 ;
mcu_y = 0; // <<<<<< Added to correct 2nd image bug
delete pImage; // <<<<<< Added to correct memory leak bug
#ifdef USE_SD_CARD
g_pInFile.close();
#endif
if (status != PJPG_NO_MORE_BLOCKS)
{
#ifdef DEBUG
Serial.print("pjpeg_decode_mcu() failed with status ");
Serial.println(status);
#endif
delete pImage;
return -1;
}
}
return 1;
}
int JPEGDecoder::decode_mcu(void){
status = pjpeg_decode_mcu();
if (status)
{
is_available = 0 ;
g_pInFile.close();
if (status != PJPG_NO_MORE_BLOCKS)
{
#ifdef DEBUG
Serial.print("pjpeg_decode_mcu() failed with status ");
Serial.println(status);
#endif
delete pImage;
return -1;
}
}
return 1;
}
int main ( void )
{
//FILE *fp;
//FILE *fpout;
unsigned char status;
pjpeg_image_info_t pInfo;
unsigned int sum;
//unsigned int ra;
unsigned int rb;
//unsigned int x,rx;
//unsigned int y,ry;
//fp=fopen("base.bmp","rb");
//if(fp==NULL) return(1);
//dlen=fread(odat,1,122,fp);
//fclose(fp);
//if(dlen!=122) return(1);
//fpout=fopen("out.bmp","wb");
//if(fpout==NULL) return(1);
//fwrite(odat,1,122,fpout);
doff=0;
status = pjpeg_decode_init(&pInfo, pjpeg_need_bytes_callback, NULL,0);
if (status)
{
printf("pjpeg_decode_init() failed with status %u\n", status);
return(1);
}
//x=0;
//y=128-1;
sum=0;
while(status==0)
{
status=pjpeg_decode_mcu();
//printf("decode %u\n",ra);
if(status==0)
{
switch(pInfo.m_scanType)
{
case PJPG_GRAYSCALE: break;
case PJPG_YH1V1:
{
//rx=0;
//ry=0;
for(rb=0;rb<64;rb++)
{
sum+=pInfo.m_pMCUBufB[rb];
sum+=pInfo.m_pMCUBufG[rb];
sum+=pInfo.m_pMCUBufR[rb];
//odat[y-ry][x+rx][0]=pInfo.m_pMCUBufB[rb];
//odat[y-ry][x+rx][1]=pInfo.m_pMCUBufG[rb];
//odat[y-ry][x+rx][2]=pInfo.m_pMCUBufR[rb];
//rx++;
//if(rx>=8)
//{
//rx=0;
//ry++;
//}
}
//x+=8;
//if(x>=256)
//{
//y-=8;
//x=0;
//}
//// PJPG_H1V1: Each MCU contains is decoded to a single block of 8x8 RGB pixels.
//// unsigned char *m_pMCUBufR;
//for(rb=0;rb<64;rb++) sum+=pInfo.m_pMCUBufR[rb];
//fwrite(pInfo.m_pMCUBufR,1,64,fpout);
//fwrite(pInfo.m_pMCUBufR,1,64,fp);
////unsigned char *m_pMCUBufG;
//for(rb=0;rb<64;rb++) sum+=pInfo.m_pMCUBufG[rb];
//fwrite(pInfo.m_pMCUBufG,1,64,fpout);
//fwrite(pInfo.m_pMCUBufG,1,64,fp);
////unsigned char *m_pMCUBufB;
//for(rb=0;rb<64;rb++) sum+=pInfo.m_pMCUBufB[rb];
//fwrite(pInfo.m_pMCUBufB,1,64,fpout);
//fwrite(pInfo.m_pMCUBufB,1,64,fp);
break;
}
case PJPG_YH2V1: break;
case PJPG_YH1V2: break;
case PJPG_YH2V2: break;
}
}
}
if(status!=PJPG_NO_MORE_BLOCKS)
{
printf("status %u\n",status);
return(1);
}
printf("----\n");
printf("%d\n",pInfo.m_width);
printf("%d\n",pInfo.m_height);
printf("%d\n",pInfo.m_comps);
printf("%d\n",pInfo.m_MCUSPerRow);
printf("%d\n",pInfo.m_MCUSPerCol);
printf("%d\n",pInfo.m_scanType);
printf("%d\n",pInfo.m_MCUWidth);
printf("%d\n",pInfo.m_MCUHeight);
printf("---- sum 0x%08X %u\n",sum,sum);
//fwrite(odat,1,sizeof(odat),fpout);
//fclose(fpout);
return(0);
}
int main ( void )
{
unsigned char status;
pjpeg_image_info_t pInfo;
unsigned int sum;
unsigned int rb;
doff=0;
status = pjpeg_decode_init(&pInfo, pjpeg_need_bytes_callback,(void *)0,0);
if (status)
{
return(1);
}
sum=0;
while(status==0)
{
status=pjpeg_decode_mcu();
//printf("decode %u\n",ra);
if(status==0)
{
switch(pInfo.m_scanType)
{
case PJPG_GRAYSCALE: break;
case PJPG_YH1V1:
{
for(rb=0;rb<64;rb++)
{
sum+=pInfo.m_pMCUBufB[rb];
sum+=pInfo.m_pMCUBufG[rb];
sum+=pInfo.m_pMCUBufR[rb];
}
//// PJPG_H1V1: Each MCU contains is decoded to a single block of 8x8 RGB pixels.
//// unsigned char *m_pMCUBufR;
//for(rb=0;rb<64;rb++) sum+=pInfo.m_pMCUBufR[rb];
//fwrite(pInfo.m_pMCUBufR,1,64,fpout);
//fwrite(pInfo.m_pMCUBufR,1,64,fp);
////unsigned char *m_pMCUBufG;
//for(rb=0;rb<64;rb++) sum+=pInfo.m_pMCUBufG[rb];
//fwrite(pInfo.m_pMCUBufG,1,64,fpout);
//fwrite(pInfo.m_pMCUBufG,1,64,fp);
////unsigned char *m_pMCUBufB;
//for(rb=0;rb<64;rb++) sum+=pInfo.m_pMCUBufB[rb];
//fwrite(pInfo.m_pMCUBufB,1,64,fpout);
//fwrite(pInfo.m_pMCUBufB,1,64,fp);
break;
}
case PJPG_YH2V1: break;
case PJPG_YH1V2: break;
case PJPG_YH2V2: break;
}
}
}
if(status!=PJPG_NO_MORE_BLOCKS)
{
return(1);
}
printf("---- sum 0x%08X %u\n",sum,sum);
return(0);
}
uint8_t *pjpeg_load_from_file(const char *pFilename, unsigned *x, unsigned *y, int *comps, pjpeg_scan_type_t *pScan_type, int reduce)
{
pjpeg_image_info_t image_info;
int mcu_x = 0;
int mcu_y = 0;
uint row_pitch;
uint8_t *pImage;
uint8_t status;
uint decoded_width, decoded_height;
uint row_blocks_per_mcu, col_blocks_per_mcu;
*x = 0;
*y = 0;
*comps = 0;
if (pScan_type) *pScan_type = PJPG_GRAYSCALE;
g_pInFile = fopen(pFilename, "rb");
if (!g_pInFile)
return NULL;
g_nInFileOfs = 0;
fseek(g_pInFile, 0, SEEK_END);
g_nInFileSize = ftell(g_pInFile);
fseek(g_pInFile, 0, SEEK_SET);
status = pjpeg_decode_init(&image_info, pjpeg_need_bytes_callback, NULL, (unsigned char)reduce);
if (status)
{
printf("pjpeg_decode_init() failed with status %u\n", status);
if (status == PJPG_UNSUPPORTED_MODE)
{
printf("Progressive JPEG files are not supported.\n");
}
fclose(g_pInFile);
return NULL;
}
if (pScan_type)
*pScan_type = image_info.m_scanType;
// In reduce mode output 1 pixel per 8x8 block.
decoded_width = reduce ? (image_info.m_MCUSPerRow * image_info.m_MCUWidth) / 8 : image_info.m_width;
decoded_height = reduce ? (image_info.m_MCUSPerCol * image_info.m_MCUHeight) / 8 : image_info.m_height;
row_pitch = decoded_width * 4;
pImage = (uint8_t *)malloc(row_pitch * decoded_height);
if (!pImage)
{
fclose(g_pInFile);
return NULL;
}
row_blocks_per_mcu = image_info.m_MCUWidth >> 3;
col_blocks_per_mcu = image_info.m_MCUHeight >> 3;
for ( ; ; )
{
int y, x;
uint8_t *pDst_row;
status = pjpeg_decode_mcu();
if (status)
{
if (status != PJPG_NO_MORE_BLOCKS)
{
printf("pjpeg_decode_mcu() failed with status %u\n", status);
free(pImage);
fclose(g_pInFile);
return NULL;
}
break;
}
if (mcu_y >= image_info.m_MCUSPerCol)
{
free(pImage);
fclose(g_pInFile);
return NULL;
}
if (reduce)
{
// In reduce mode, only the first pixel of each 8x8 block is valid.
pDst_row = pImage + mcu_y * col_blocks_per_mcu * row_pitch + mcu_x * row_blocks_per_mcu * image_info.m_comps;
if (image_info.m_scanType == PJPG_GRAYSCALE)
{
*pDst_row = image_info.m_pMCUBufR[0];
}
else
{
uint y, x;
for (y = 0; y < col_blocks_per_mcu; y++)
{
uint src_ofs = (y * 128U);
for (x = 0; x < row_blocks_per_mcu; x++)
{
pDst_row[0] = image_info.m_pMCUBufR[src_ofs];
pDst_row[1] = image_info.m_pMCUBufG[src_ofs];
pDst_row[2] = image_info.m_pMCUBufB[src_ofs];
pDst_row += 3;
src_ofs += 64;
}
pDst_row += row_pitch - 3 * row_blocks_per_mcu;
}
}
}
else
{
// Copy MCU's pixel blocks into the destination bitmap.
pDst_row = pImage + (mcu_y * image_info.m_MCUHeight) * row_pitch + (mcu_x * image_info.m_MCUWidth * 4);
for (y = 0; y < image_info.m_MCUHeight; y += 8)
{
const int by_limit = min(8, image_info.m_height - (mcu_y * image_info.m_MCUHeight + y));
for (x = 0; x < image_info.m_MCUWidth; x += 8)
{
uint8_t *pDst_block = pDst_row + x * 4;
// Compute source byte offset of the block in the decoder's MCU buffer.
uint src_ofs = (x * 8U) + (y * 16U);
const uint8_t *pSrcR = image_info.m_pMCUBufR + src_ofs;
const uint8_t *pSrcG = image_info.m_pMCUBufG + src_ofs;
const uint8_t *pSrcB = image_info.m_pMCUBufB + src_ofs;
const int bx_limit = min(8, image_info.m_width - (mcu_x * image_info.m_MCUWidth + x));
if (image_info.m_scanType == PJPG_GRAYSCALE)
{
int bx, by;
for (by = 0; by < by_limit; by++)
{
uint8_t *pDst = pDst_block;
for (bx = 0; bx < bx_limit; bx++)
{
*pDst++ = *pSrcR;
*pDst++ = *pSrcR;
*pDst++ = *pSrcR++;
*pDst++ = 0xFF;
}
pSrcR += (8 - bx_limit);
pDst_block += row_pitch;
}
}
else
{
int bx, by;
for (by = 0; by < by_limit; by++)
{
uint8_t *pDst = pDst_block;
for (bx = 0; bx < bx_limit; bx++)
{
pDst[0] = *pSrcR++;
pDst[1] = *pSrcG++;
pDst[2] = *pSrcB++;
pDst[3] = 0xFF;
pDst += 4;
}
pSrcR += (8 - bx_limit);
pSrcG += (8 - bx_limit);
pSrcB += (8 - bx_limit);
pDst_block += row_pitch;
}
}
}
pDst_row += (row_pitch * 8);
}
}
mcu_x++;
if (mcu_x == image_info.m_MCUSPerRow)
{
mcu_x = 0;
mcu_y++;
}
}
fclose(g_pInFile);
*x = decoded_width;
*y = decoded_height;
*comps = image_info.m_comps;
return pImage;
}
