if (code & 0x80 ) { /* run */
pix = bytestream2_get_byte(gbc);
for (j = 0; j < 257 - code; j++) {
- out[pos++] = (pix & 0xC0) >> 6;
- out[pos++] = (pix & 0x30) >> 4;
- out[pos++] = (pix & 0x0C) >> 2;
- out[pos++] = (pix & 0x03);
- if (pos >= offset) {
- pos -= offset;
- pos++;
- }
- if (pos >= offset)
- return AVERROR_INVALIDDATA;
+ if (pos < offset)
+ out[pos++] = (pix & 0xC0) >> 6;
+ if (pos < offset)
+ out[pos++] = (pix & 0x30) >> 4;
+ if (pos < offset)
+ out[pos++] = (pix & 0x0C) >> 2;
+ if (pos < offset)
+ out[pos++] = (pix & 0x03);
}
left -= 2;
} else { /* copy */
for (j = 0; j < code + 1; j++) {
pix = bytestream2_get_byte(gbc);
- out[pos++] = (pix & 0xC0) >> 6;
- out[pos++] = (pix & 0x30) >> 4;
- out[pos++] = (pix & 0x0C) >> 2;
- out[pos++] = (pix & 0x03);
- if (pos >= offset) {
- pos -= offset;
- pos++;
- }
- if (pos >= offset)
- return AVERROR_INVALIDDATA;
+ if (pos < offset)
+ out[pos++] = (pix & 0xC0) >> 6;
+ if (pos < offset)
+ out[pos++] = (pix & 0x30) >> 4;
+ if (pos < offset)
+ out[pos++] = (pix & 0x0C) >> 2;
+ if (pos < offset)
+ out[pos++] = (pix & 0x03);
}
left -= 1 + (code + 1);
}
if (code & 0x80 ) { /* run */
pix = bytestream2_get_byte(gbc);
for (j = 0; j < 257 - code; j++) {
- out[pos++] = (pix & 0xF0) >> 4;
- out[pos++] = pix & 0xF;
- if (pos >= offset) {
- pos -= offset;
- pos++;
- }
- if (pos >= offset)
- return AVERROR_INVALIDDATA;
+ if (pos < offset)
+ out[pos++] = (pix & 0xF0) >> 4;
+ if (pos < offset)
+ out[pos++] = pix & 0xF;
}
left -= 2;
} else { /* copy */
for (j = 0; j < code + 1; j++) {
pix = bytestream2_get_byte(gbc);
- out[pos++] = (pix & 0xF0) >> 4;
- out[pos++] = pix & 0xF;
- if (pos >= offset) {
- pos -= offset;
- pos++;
- }
- if (pos >= offset)
- return AVERROR_INVALIDDATA;
+ if (pos < offset)
+ out[pos++] = (pix & 0xF0) >> 4;
+ if (pos < offset)
+ out[pos++] = pix & 0xF;
}
left -= 1 + (code + 1);
}