* Copyright (c) 2011 Konstantin Shishkov
* based on work by Vladimir "VAG" Gneushev
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
const int size = width * height;
if (bytestream2_get_buffer(gb, frame, size) != size)
- return -1;
+ return AVERROR_INVALIDDATA;
return 0;
}
segments = bytestream2_get_le32(gb);
offset = bytestream2_get_le32(gb);
+ if (segments == 0 && offset == frame_end - frame)
+ return 0; // skip frame
if (frame_end - frame <= offset)
- return -1;
+ return AVERROR_INVALIDDATA;
frame += offset;
while (segments--) {
if (bytestream2_get_bytes_left(gb) < 2)
- return -1;
+ return AVERROR_INVALIDDATA;
if (mask == 0x10000) {
bitbuf = bytestream2_get_le16u(gb);
mask = 1;
}
if (frame_end - frame < 2)
- return -1;
+ return AVERROR_INVALIDDATA;
if (bitbuf & mask) {
v = bytestream2_get_le16(gb);
offset = (v & 0x1FFF) << 1;
count = ((v >> 13) + 2) << 1;
if (frame - frame_start < offset || frame_end - frame < count)
- return -1;
+ return AVERROR_INVALIDDATA;
av_memcpy_backptr(frame, offset, count);
frame += count;
} else {
segments = bytestream2_get_le16(gb);
while (segments--) {
if (bytestream2_get_bytes_left(gb) < 2)
- return -1;
+ return AVERROR_INVALIDDATA;
if (mask == 0x10000) {
bitbuf = bytestream2_get_le16u(gb);
mask = 1;
}
if (frame_end - frame < 2)
- return -1;
+ return AVERROR_INVALIDDATA;
if (bitbuf & mask) {
v = bytestream2_get_le16(gb);
offset = (v & 0x1FFF) << 1;
count = ((v >> 13) + 2) << 1;
if (frame - frame_start < offset || frame_end - frame < count)
- return -1;
+ return AVERROR_INVALIDDATA;
// can't use av_memcpy_backptr() since it can overwrite following pixels
for (v = 0; v < count; v++)
frame[v] = frame[v - offset];
segments = bytestream2_get_le16(gb);
while (segments--) {
if (bytestream2_get_bytes_left(gb) < 2)
- return -1;
+ return AVERROR_INVALIDDATA;
if (mask == 0x10000) {
bitbuf = bytestream2_get_le16u(gb);
mask = 1;
}
- if (frame_end - frame < 2)
- return -1;
+ if (frame_end - frame < width + 2)
+ return AVERROR_INVALIDDATA;
if (bitbuf & mask) {
v = bytestream2_get_le16(gb);
offset = (v & 0x1FFF) << 2;
count = ((v >> 13) + 2) << 1;
if (frame - frame_start < offset || frame_end - frame < count*2 + width)
- return -1;
+ return AVERROR_INVALIDDATA;
for (i = 0; i < count; i++) {
frame[0] = frame[1] =
frame[width] = frame[width + 1] = frame[-offset];
count = bytestream2_get_le16(gb);
if (count >= height)
- return -1;
+ return AVERROR_INVALIDDATA;
frame += width * count;
lines = bytestream2_get_le16(gb);
if (count + lines > height)
- return -1;
+ return AVERROR_INVALIDDATA;
while (lines--) {
if (bytestream2_get_bytes_left(gb) < 1)
- return -1;
+ return AVERROR_INVALIDDATA;
line_ptr = frame;
frame += width;
segments = bytestream2_get_byteu(gb);
while (segments--) {
if (frame - line_ptr <= bytestream2_peek_byte(gb))
- return -1;
+ return AVERROR_INVALIDDATA;
line_ptr += bytestream2_get_byte(gb);
count = (int8_t)bytestream2_get_byte(gb);
if (count >= 0) {
if (frame - line_ptr < count)
- return -1;
+ return AVERROR_INVALIDDATA;
if (bytestream2_get_buffer(gb, line_ptr, count) != count)
- return -1;
+ return AVERROR_INVALIDDATA;
} else {
count = -count;
if (frame - line_ptr < count)
- return -1;
+ return AVERROR_INVALIDDATA;
memset(line_ptr, bytestream2_get_byte(gb), count);
}
line_ptr += count;
lines = bytestream2_get_le16(gb);
if (lines > height)
- return -1;
+ return AVERROR_INVALIDDATA;
while (lines--) {
if (bytestream2_get_bytes_left(gb) < 2)
- return -1;
+ return AVERROR_INVALIDDATA;
segments = bytestream2_get_le16u(gb);
while ((segments & 0xC000) == 0xC000) {
unsigned skip_lines = -(int16_t)segments;
unsigned delta = -((int16_t)segments * width);
if (frame_end - frame <= delta || y + lines + skip_lines > height)
- return -1;
+ return AVERROR_INVALIDDATA;
frame += delta;
y += skip_lines;
segments = bytestream2_get_le16(gb);
}
+ if (frame_end <= frame)
+ return -1;
if (segments & 0x8000) {
frame[width - 1] = segments & 0xFF;
segments = bytestream2_get_le16(gb);
y++;
while (segments--) {
if (frame - line_ptr <= bytestream2_peek_byte(gb))
- return -1;
+ return AVERROR_INVALIDDATA;
line_ptr += bytestream2_get_byte(gb);
count = (int8_t)bytestream2_get_byte(gb);
if (count >= 0) {
if (frame - line_ptr < count * 2)
- return -1;
+ return AVERROR_INVALIDDATA;
if (bytestream2_get_buffer(gb, line_ptr, count * 2) != count * 2)
- return -1;
+ return AVERROR_INVALIDDATA;
line_ptr += count * 2;
} else {
count = -count;
if (frame - line_ptr < count * 2)
- return -1;
+ return AVERROR_INVALIDDATA;
v = bytestream2_get_le16(gb);
for (i = 0; i < count; i++)
bytestream_put_le16(&line_ptr, v);
static int decode_unk6(GetByteContext *gb, uint8_t *frame, int width, int height)
{
- return -1;
+ return AVERROR_PATCHWELCOME;
}
static int decode_blck(GetByteContext *gb, uint8_t *frame, int width, int height)
pal_elems = FFMIN(chunk_size / 3, 256);
for (i = 0; i < pal_elems; i++) {
s->pal[i] = bytestream2_get_be24(&gb) << 2;
- s->pal[i] |= (s->pal[i] >> 6) & 0x333;
+ s->pal[i] |= 0xFF << 24 | (s->pal[i] >> 6) & 0x30303;
}
s->pic.palette_has_changed = 1;
} else if (chunk_type <= 9) {
if (decoder[chunk_type - 2](&gb, s->frame_buf, avctx->width, avctx->height)) {
av_log(avctx, AV_LOG_ERROR, "Error decoding %s chunk\n",
chunk_name[chunk_type - 2]);
- return -1;
+ return AVERROR_INVALIDDATA;
}
} else {
av_log(avctx, AV_LOG_WARNING, "Ignoring unknown chunk type %d\n",
projects / ffmpeg / blobdiff