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make TSCC endian-safe, PPC testing courtesy of Diego B.

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Originally committed as revision 5007 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson 2006-02-12 16:56:06 +00:00
parent 75b5b63179
commit 1927cd41e0
1 changed files with 34 additions and 18 deletions
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52
libavcodec/tscc.c
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@ -77,6 +77,8 @@ static int decode_rle(CamtasiaContext *c, unsigned int srcsize)
unsigned char *src = c->decomp_buf;
unsigned char *output, *output_end;
int p1, p2, line=c->height, pos=0, i;
uint16_t pix16;
uint32_t pix32;
output = c->pic.data[0] + (c->height - 1) * c->pic.linesize[0];
output_end = c->pic.data[0] + (c->height) * c->pic.linesize[0];
@ -107,12 +109,28 @@ static int decode_rle(CamtasiaContext *c, unsigned int srcsize)
src += p2 * (c->bpp / 8);
continue;
}
for(i = 0; i < p2 * (c->bpp / 8); i++) {
*output++ = *src++;
}
// RLE8 copy is actually padded - and runs are not!
if(c->bpp == 8 && (p2 & 1)) {
src++;
if ((c->bpp == 8) || (c->bpp == 24)) {
for(i = 0; i < p2 * (c->bpp / 8); i++) {
*output++ = *src++;
}
// RLE8 copy is actually padded - and runs are not!
if(c->bpp == 8 && (p2 & 1)) {
src++;
}
} else if (c->bpp == 16) {
for(i = 0; i < p2; i++) {
pix16 = LE_16(src);
src += 2;
*(uint16_t*)output = pix16;
output += 2;
}
} else if (c->bpp == 32) {
for(i = 0; i < p2; i++) {
pix32 = LE_32(src);
src += 4;
*(uint32_t*)output = pix32;
output += 4;
}
}
pos += p2;
} else { //Run of pixels
@ -120,17 +138,17 @@ static int decode_rle(CamtasiaContext *c, unsigned int srcsize)
switch(c->bpp){
case 8: pix[0] = *src++;
break;
case 16: pix[0] = *src++;
pix[1] = *src++;
case 16: pix16 = LE_16(src);
src += 2;
*(uint16_t*)pix = pix16;
break;
case 24: pix[0] = *src++;
pix[1] = *src++;
pix[2] = *src++;
break;
case 32: pix[0] = *src++;
pix[1] = *src++;
pix[2] = *src++;
pix[3] = *src++;
case 32: pix32 = LE_32(src);
src += 4;
*(uint32_t*)pix = pix32;
break;
}
if (output + p1 * (c->bpp / 8) > output_end)
@ -139,17 +157,15 @@ static int decode_rle(CamtasiaContext *c, unsigned int srcsize)
switch(c->bpp){
case 8: *output++ = pix[0];
break;
case 16: *output++ = pix[0];
*output++ = pix[1];
case 16: *(uint16_t*)output = pix16;
output += 2;
break;
case 24: *output++ = pix[0];
*output++ = pix[1];
*output++ = pix[2];
break;
case 32: *output++ = pix[0];
*output++ = pix[1];
*output++ = pix[2];
*output++ = pix[3];
case 32: *(uint32_t*)output = pix32;
output += 4;
break;
}
}