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avcodec/gif_parser: split correctly also bitstreams that do not have extension blocks

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Paul B Mahol 2023-11-12 02:16:17 +01:00
parent 553b31da68
commit 10440a489a
1 changed files with 11 additions and 0 deletions
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11
libavcodec/gif_parser.c
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@ -67,6 +67,17 @@ static int gif_find_frame_end(GIFParseContext *g, const uint8_t *buf,
g->state = GIF_EXTENSION;
g->found_start = pc->frame_start_found = 1;
} else if (buf[index] == GIF_IMAGE_SEPARATOR) {
if (g->state != GIF_EXTENSION_BLOCK && g->found_start &&
g->found_end && g->found_sig) {
next = index;
g->found_start = pc->frame_start_found = 1;
g->found_end = 0;
g->index = 0;
g->gct_flag = 0;
g->gct_size = 0;
g->state = GIF_IMAGE;
break;
}
g->state = GIF_IMAGE;
} else if (buf[index] == GIF_TRAILER) {
g->state = 0;