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Update screenshot code.

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This commit is contained in:
sorgelig
2019-05-09 21:41:33 +08:00
parent 92dcdba832
commit 798c996c6e
9 changed files with 118 additions and 109 deletions
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48
scaler.cpp
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@@ -17,21 +17,18 @@ with help from the MiSTer contributors including Grabulosaure
#include <sys/mman.h>
#include <err.h>
#include "scaler.h"
mister_scaler * mister_scaler_init()
{
mister_scaler *ms =(mister_scaler *) calloc(sizeof(mister_scaler),1);
int pagesize = sysconf(_SC_PAGE_SIZE);
if (pagesize==0) pagesize=4096;
int offset = MISTER_SCALAR_BASEADDR;
int offset = MISTER_SCALER_BASEADDR;
int map_start = offset & ~(pagesize - 1);
ms->map_off = offset - map_start;
ms->num_bytes=MISTER_SCALAR_BUFFERSIZE;
ms->num_bytes=MISTER_SCALER_BUFFERSIZE;
//printf("map_start = %d map_off=%d offset=%d\n",map_start,ms->map_off,offset);
unsigned char *buffer;
@@ -68,6 +65,7 @@ mister_scaler * mister_scaler_init()
return ms;
}
void mister_scaler_free(mister_scaler *ms)
{
munmap(ms->map,ms->num_bytes+ms->map_off);
@@ -75,7 +73,8 @@ void mister_scaler_free(mister_scaler *ms)
free(ms);
}
int mister_scaler_read_yuv(mister_scaler *ms,int lineY,unsigned char *bufY, int lineU, unsigned char *bufU, int lineV, unsigned char *bufV) {
int mister_scaler_read_yuv(mister_scaler *ms,int lineY,unsigned char *bufY, int lineU, unsigned char *bufU, int lineV, unsigned char *bufV)
{
unsigned char *buffer;
buffer = (unsigned char *)(ms->map+ms->map_off);
@@ -84,28 +83,29 @@ int mister_scaler_read_yuv(mister_scaler *ms,int lineY,unsigned char *bufY, int
unsigned char *outbufy;
unsigned char *outbufU;
unsigned char *outbufV;
for (int y=0; y< ms->height ; y++) {
pixbuf=&buffer[ms->header + y*ms->line];
outbufy=&bufY[y*(lineY)];
outbufU=&bufU[y*(lineU)];
outbufV=&bufV[y*(lineV)];
for (int x = 0; x < ms->width ; x++) {
int R,G,B;
R = *pixbuf++;
G = *pixbuf++;
B = *pixbuf++;
int Y = (0.257 * R) + (0.504 * G) + (0.098 * B) + 16;
int U = -(0.148 * R) - (0.291 * G) + (0.439 * B) + 128;
int V = (0.439 * R) - (0.368 * G) - (0.071 * B) + 128;
for (int y=0; y< ms->height ; y++)
{
pixbuf=&buffer[ms->header + y*ms->line];
outbufy=&bufY[y*(lineY)];
outbufU=&bufU[y*(lineU)];
outbufV=&bufV[y*(lineV)];
for (int x = 0; x < ms->width ; x++)
{
int R,G,B;
R = *pixbuf++;
G = *pixbuf++;
B = *pixbuf++;
int Y = (0.257 * R) + (0.504 * G) + (0.098 * B) + 16;
int U = -(0.148 * R) - (0.291 * G) + (0.439 * B) + 128;
int V = (0.439 * R) - (0.368 * G) - (0.071 * B) + 128;
*outbufy++ = Y;
*outbufU++ = U;
*outbufV++ = V;
}
*outbufy++ = Y;
*outbufU++ = U;
*outbufV++ = V;
}
}
return 0;
}
int mister_scaler_read(mister_scaler *ms,unsigned char *gbuf)