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bmv: return meaningful error codes.

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This commit is contained in:
Anton Khirnov 2012-11-15 10:10:13 +01:00
parent abcc235481
commit 2b011a43e9
1 changed files with 8 additions and 8 deletions
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16
libavcodec/bmv.c
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@ -67,7 +67,7 @@ static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame,
int i;
if (src_len <= 0)
return -1;
return AVERROR_INVALIDDATA;
if (forward) {
src = source;
@ -91,7 +91,7 @@ static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame,
*/
if (!mode || (tmplen == 4)) {
if (src < source || src >= source_end)
return -1;
return AVERROR_INVALIDDATA;
val = *src;
read_two_nibbles = 1;
} else {
@ -102,7 +102,7 @@ static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame,
for (;;) {
if (!read_two_nibbles) {
if (src < source || src >= source_end)
return -1;
return AVERROR_INVALIDDATA;
shift += 2;
val |= *src << shift;
if (*src & 0xC)
@ -137,7 +137,7 @@ static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame,
if (mode >= 4)
mode -= 3;
if (FFABS(dst_end - dst) < len)
return -1;
return AVERROR_INVALIDDATA;
switch (mode) {
case 1:
if (forward) {
@ -145,7 +145,7 @@ static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame,
dst - frame + SCREEN_WIDE + frame_off < 0 ||
frame_end - dst < frame_off + len ||
frame_end - dst < len)
return -1;
return AVERROR_INVALIDDATA;
for (i = 0; i < len; i++)
dst[i] = dst[frame_off + i];
dst += len;
@ -155,7 +155,7 @@ static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame,
dst - frame + SCREEN_WIDE + frame_off < 0 ||
frame_end - dst < frame_off + len ||
frame_end - dst < len)
return -1;
return AVERROR_INVALIDDATA;
for (i = len - 1; i >= 0; i--)
dst[i] = dst[frame_off + i];
}
@ -163,13 +163,13 @@ static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame,
case 2:
if (forward) {
if (source + src_len - src < len)
return -1;
return AVERROR_INVALIDDATA;
memcpy(dst, src, len);
dst += len;
src += len;
} else {
if (src - source < len)
return -1;
return AVERROR_INVALIDDATA;
dst -= len;
src -= len;
memcpy(dst, src, len);