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lavc/qdrw: Read PixMap palette. 

Fixes ticket #6195.
This commit is contained in:
Carl Eugen Hoyos 2018-05-05 02:24:15 +02:00
parent 9481802539
commit 6dc79637f3
1 changed files with 7 additions and 5 deletions
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12
libavcodec/qdrw.c
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@ -45,14 +45,14 @@ enum QuickdrawOpcodes {
};
static int parse_palette(AVCodecContext *avctx, GetByteContext *gbc,
uint32_t *pal, int colors)
uint32_t *pal, int colors, int pixmap)
{
int i;
for (i = 0; i <= colors; i++) {
uint8_t r, g, b;
unsigned int idx = bytestream2_get_be16(gbc); /* color index */
if (idx > 255) {
if (idx > 255 && !pixmap) {
av_log(avctx, AV_LOG_WARNING,
"Palette index out of range: %u\n", idx);
bytestream2_skip(gbc, 6);
@ -66,7 +66,7 @@ static int parse_palette(AVCodecContext *avctx, GetByteContext *gbc,
bytestream2_skip(gbc, 1);
b = bytestream2_get_byte(gbc);
bytestream2_skip(gbc, 1);
pal[idx] = (0xFFU << 24) | (r << 16) | (g << 8) | b;
pal[pixmap ? i : idx] = (0xFFU << 24) | (r << 16) | (g << 8) | b;
}
return 0;
}
@ -335,6 +335,7 @@ static int decode_frame(AVCodecContext *avctx,
while (bytestream2_get_bytes_left(&gbc) >= 4) {
int bppcnt, bpp;
int rowbytes, pack_type;
int flags;
int opcode = bytestream2_get_be16(&gbc);
switch(opcode) {
@ -345,7 +346,8 @@ static int decode_frame(AVCodecContext *avctx,
case PACKBITSRGN:
av_log(avctx, AV_LOG_DEBUG, "Parsing Packbit opcode\n");
bytestream2_skip(&gbc, 30);
flags = bytestream2_get_be16(&gbc) & 0xC000;
bytestream2_skip(&gbc, 28);
bppcnt = bytestream2_get_be16(&gbc); /* cmpCount */
bpp = bytestream2_get_be16(&gbc); /* cmpSize */
@ -380,7 +382,7 @@ static int decode_frame(AVCodecContext *avctx,
if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
return ret;
ret = parse_palette(avctx, &gbc, (uint32_t *)p->data[1], colors);
ret = parse_palette(avctx, &gbc, (uint32_t *)p->data[1], colors, flags & 0x8000);
if (ret < 0)
return ret;
p->palette_has_changed = 1;