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Fix several bugs in h264bitstream

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This commit is contained in:
Cameron Gutman
2026-07-26 18:55:23 -05:00
parent acea86de24
commit 3e24a7a1a5
3 changed files with 51 additions and 15 deletions
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h264bitstream/h264_nal.c
+10 -6
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@@ -26,32 +26,36 @@ int find_nal_unit(uint8_t* buf, int size, int* nal_start, int* nal_end)
i = 0;
while (
(i + 2 < size) &&
(buf[i] != 0 || buf[i+1] != 0 || buf[i+2] != 0x01) &&
(buf[i] != 0 || buf[i+1] != 0 || buf[i+2] != 0 || buf[i+3] != 0x01)
(i + 3 >= size || buf[i] != 0 || buf[i+1] != 0 || buf[i+2] != 0 || buf[i+3] != 0x01)
)
{
i++;
if (i+4 >= size) { return 0; }
}
if (buf[i] != 0 || buf[i+1] != 0 || buf[i+2] != 0x01)
if (i + 2 >= size) { return 0; }
if (buf[i] != 0 || buf[i+1] != 0 || buf[i+2] != 0x01)
{
i++;
}
if (buf[i] != 0 || buf[i+1] != 0 || buf[i+2] != 0x01) { return 0; }
i+= 3;
if (i + 2 >= size || buf[i] != 0 || buf[i+1] != 0 || buf[i+2] != 0x01) { return 0; }
i += 3;
*nal_start = i;
while (
(i + 2 < size) &&
(buf[i] != 0 || buf[i+1] != 0 || buf[i+2] != 0) &&
(buf[i] != 0 || buf[i+1] != 0 || buf[i+2] != 0x01)
)
{
i++;
if (i+3 >= size) { *nal_end = size; return -1; }
}
if (i + 2 >= size) { *nal_end = size; return (*nal_end - *nal_start); }
*nal_end = i;
return (*nal_end - *nal_start);
}