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RGB888 JPEG decode (implemented in some cases only)

dv_stick
Mike Bell 2023-06-03 17:51:03 +01:00 zatwierdzone przez Phil Howard
rodzic 575e806cc8
commit a6bd626334
4 zmienionych plików z 48 dodań i 14 usunięć
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24
examples/dv_stick/dv_slideshow.cpp
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@ -12,14 +12,14 @@
using namespace pimoroni;
#define FRAME_WIDTH 1280
#define FRAME_WIDTH 640
#define FRAME_HEIGHT 720
FATFS fs;
FRESULT fr;
DVDisplay display(FRAME_WIDTH, FRAME_HEIGHT);
PicoGraphics_PenDV_RGB555 graphics(FRAME_WIDTH, FRAME_HEIGHT, display);
DVDisplay display(FRAME_WIDTH, FRAME_HEIGHT, DVDisplay::MODE_RGB888);
PicoGraphics_PenDV_RGB888 graphics(FRAME_WIDTH, FRAME_HEIGHT, display);
JPEGDEC jpeg;
struct {
@ -48,24 +48,26 @@ int32_t jpegdec_seek_callback(JPEGFILE *jpeg, int32_t p) {
}
int jpegdec_draw_callback(JPEGDRAW *draw) {
uint16_t *p = draw->pPixels;
uint8_t *p = (uint8_t*)draw->pPixels;
int xo = jpeg_decode_options.x;
int yo = jpeg_decode_options.y;
for(int y = 0; y < draw->iHeight; y++) {
for(int x = 0; x < draw->iWidth; x++) {
int sx = draw->x + x + xo;
for(int x = 0; x < draw->iWidth; x+=2) {
int sx = ((draw->x + x) >> 1) + xo;
int sy = draw->y + y + yo;
if(sx >= 0 && sx < graphics.bounds.w && x < draw->iWidthUsed &&
sy >= 0 && sy < graphics.bounds.h) {
const RGB565 col = *p;
graphics.set_pen((col & 0x1F) | ((col & 0xFFC0) >> 1));
RGB888 col = ((((uint32_t)p[0] + (uint32_t)p[3]) << 15) & 0xff0000) |
((((uint32_t)p[1] + (uint32_t)p[4]) << 7) & 0xff00) |
(((uint32_t)p[2] + (uint32_t)p[5]) >> 1);
graphics.set_pen(col);
graphics.pixel({sx, sy});
}
p++;
p += 6;
}
}
@ -82,10 +84,10 @@ void draw_jpeg(std::string filename) {
jpegdec_draw_callback
);
jpeg_decode_options.x = (FRAME_WIDTH - jpeg.getWidth()) >> 1;
jpeg_decode_options.x = (FRAME_WIDTH - (jpeg.getWidth() >> 1)) >> 1;
jpeg_decode_options.y = (FRAME_HEIGHT - jpeg.getHeight()) >> 1;
jpeg.setPixelType(RGB565_LITTLE_ENDIAN);
jpeg.setPixelType(RGB888_LITTLE_ENDIAN);
printf("- starting jpeg decode..");
int start = millis();

9
examples/dv_stick/dv_stick_test.cpp
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@ -46,7 +46,7 @@ int main() {
gpio_set_dir(BUTTON_A, GPIO_IN);
gpio_pull_up(BUTTON_A);
sleep_ms(5000);
//sleep_ms(5000);
DVDisplay display(FRAME_WIDTH, FRAME_HEIGHT, DVDisplay::MODE_RGB888);
display.init();
@ -120,8 +120,15 @@ int main() {
//}
uint32_t render_start_time = time_us_32();
#if 1
for (int j = 0; j < FRAME_HEIGHT; ++j) {
graphics.set_pen(j, 0xFF, 0xFF);
graphics.pixel_span({0,j}, FRAME_WIDTH);
}
#else
graphics.set_pen(0xFF, 0xFF, 0xFF);
graphics.clear();
#endif
#if 0
for (uint i = 0; i < 128; i++) {

1
libraries/jpegdec/JPEGDEC.h
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@ -68,6 +68,7 @@
enum {
RGB565_LITTLE_ENDIAN = 0,
RGB565_BIG_ENDIAN,
RGB888_LITTLE_ENDIAN,
EIGHT_BIT_GRAYSCALE,
FOUR_BIT_DITHERED,
TWO_BIT_DITHERED,

28
libraries/jpegdec/jpeg.inl
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@ -2210,7 +2210,6 @@ static void JPEGPixel2BE(uint16_t *pDest, int32_t iY1, int32_t iY2, int32_t iCb,
*(uint32_t *)&pDest[0] = __builtin_bswap16(ulPixel1) | ((uint32_t)__builtin_bswap16(ulPixel2)<<16);
} /* JPEGPixel2BE() */
#if 0
static void JPEGPixelLE888(uint8_t *pDest, int iY, int iCb, int iCr)
{
int32_t iCBB, iCBG, iCRG, iCRR;
@ -2236,7 +2235,6 @@ static void JPEGPixelLE888(uint8_t *pDest, int iY, int iCb, int iCr)
if (uVal & 0x100) uVal = 0;
*pDest++ = uVal;
}
#endif
static void JPEGPutMCU11(JPEGIMAGE *pJPEG, int x, int iPitch)
{
@ -2246,6 +2244,7 @@ static void JPEGPutMCU11(JPEGIMAGE *pJPEG, int x, int iPitch)
int iRow;
uint8_t *pY, *pCr, *pCb;
uint16_t *pOutput = &pJPEG->usPixels[x];
uint8_t *pOutput8 = ((uint8_t*)pJPEG->usPixels) + x * 3;
pY = (unsigned char *)&pJPEG->sMCUs[0*DCTSIZE];
pCb = (unsigned char *)&pJPEG->sMCUs[1*DCTSIZE];
@ -2342,6 +2341,17 @@ static void JPEGPutMCU11(JPEGIMAGE *pJPEG, int x, int iPitch)
JPEGPixelLE(pOutput+iCol, Y, iCb, iCr);
} // for col
}
else if (pJPEG->ucPixelType == RGB888_LITTLE_ENDIAN)
{
for (iCol=0; iCol<8; iCol++) // up to 4x2 cols to do
{
iCr = *pCr++;
iCb = *pCb++;
Y = (int)(*pY++) << 12;
JPEGPixelLE888(pOutput8+iCol*3, Y, iCb, iCr);
} // for col
pOutput8 += iPitch * 3;
}
else
{
for (iCol=0; iCol<8; iCol++) // up to 4x2 cols to do
@ -2697,6 +2707,7 @@ static void JPEGPutMCU12(JPEGIMAGE *pJPEG, int x, int iPitch)
int iRow, iCol, iXCount, iYCount;
uint8_t *pY, *pCr, *pCb;
uint16_t *pOutput = &pJPEG->usPixels[x];
uint8_t *pOutput8 = ((uint8_t*)pJPEG->usPixels) + x * 3;
pY = (uint8_t *)&pJPEG->sMCUs[0*DCTSIZE];
pCb = (uint8_t *)&pJPEG->sMCUs[2*DCTSIZE];
@ -2828,6 +2839,11 @@ static void JPEGPutMCU12(JPEGIMAGE *pJPEG, int x, int iPitch)
JPEGPixelLE(pOutput + iCol, Y1, Cb, Cr);
JPEGPixelLE(pOutput + iPitch + iCol, Y2, Cb, Cr);
}
else if (pJPEG->ucPixelType == RGB888_LITTLE_ENDIAN)
{
JPEGPixelLE888(pOutput8 + iCol*3, Y1, Cb, Cr);
JPEGPixelLE888(pOutput8 + (iPitch + iCol)*3, Y2, Cb, Cr);
}
else
{
JPEGPixelBE(pOutput + iCol, Y1, Cb, Cr);
@ -2840,6 +2856,7 @@ static void JPEGPutMCU12(JPEGIMAGE *pJPEG, int x, int iPitch)
pCb += 8;
pCr += 8;
pOutput += iPitch*2; // next 2 lines of dest pixels
pOutput8 += iPitch*6;
}
} /* JPEGPutMCU12() */
static void JPEGPutMCU21(JPEGIMAGE *pJPEG, int x, int iPitch)
@ -3097,6 +3114,8 @@ static int DecodeJPEG(JPEGIMAGE *pJPEG)
cDCTable2 = pJPEG->JPCI[2].dc_tbl_no;
cACTable2 = pJPEG->JPCI[2].ac_tbl_no;
iDCPred0 = iDCPred1 = iDCPred2 = mcuCX = mcuCY = 0;
printf("SubSample mode: 0x%x\n", pJPEG->ucSubSample);
switch (pJPEG->ucSubSample) // set up the parameters for the different subsampling options
{
@ -3155,6 +3174,8 @@ static int DecodeJPEG(JPEGIMAGE *pJPEG)
iMCUCount = MAX_BUFFERED_PIXELS / (mcuCX * mcuCY);
if (pJPEG->ucPixelType == EIGHT_BIT_GRAYSCALE)
iMCUCount *= 2; // each pixel is only 1 byte
else if (pJPEG->ucPixelType == RGB888_LITTLE_ENDIAN)
iMCUCount = (iMCUCount >> 1) + (iMCUCount >> 3); // each picel is 3 bytes
if (iMCUCount > cx)
iMCUCount = cx; // don't go wider than the image
if (iMCUCount > pJPEG->iMaxMCUs) // did the user set an upper bound on how many pixels per JPEGDraw callback?
@ -3164,6 +3185,9 @@ static int DecodeJPEG(JPEGIMAGE *pJPEG)
jd.iBpp = 16;
switch (pJPEG->ucPixelType)
{
case RGB888_LITTLE_ENDIAN:
jd.iBpp = 24;
break;
case EIGHT_BIT_GRAYSCALE:
jd.iBpp = 8;
break;