From: Andre Noll <maan@systemlinux.org>
Date: Fri, 9 Oct 2009 14:02:51 +0000 (+0200)
Subject: wma: Fix chunk_table computation.
X-Git-Tag: v0.4.1~107
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=e27dd0ba730fcb7baf249bde0161a446fa3d68e6

wma: Fix chunk_table computation.
---

diff --git a/wma_afh.c b/wma_afh.c
index 2d463900..9e5f5c60 100644
--- a/wma_afh.c
+++ b/wma_afh.c
@@ -205,6 +205,8 @@ static int wma_make_chunk_table(char *buf, size_t buf_size, int block_align,
 	frames_per_chunk = num_frames / afhi->chunks_total;
 	i = 0;
 	j = 1;
+	start += afhi->header_len;
+	buf_size -= afhi->header_len;
 	FOR_EACH_FRAME(f, start, buf_size, block_align) {
 		count += f[WMA_FRAME_SKIP] & 0x0f;
 		while (count > j * frames_per_chunk && f > start) {
@@ -216,7 +218,7 @@ static int wma_make_chunk_table(char *buf, size_t buf_size, int block_align,
 					ct_size * sizeof(uint32_t));
 			}
 			PARA_DEBUG_LOG("ct[%d]: %zu\n", j, f - start);
-			afhi->chunk_table[j] = f - start;
+			afhi->chunk_table[j] = f - start + afhi->header_len;
 		}
 	}
 	afhi->chunks_total = j;
@@ -244,8 +246,7 @@ static int wma_get_file_info(char *map, size_t numbytes, __a_unused int fd,
 	afhi->header_len = ahi.header_len;
 	afhi->header_offset = 0;
 	read_asf_tags(map, ahi.header_len, &afhi->tags);
-	wma_make_chunk_table(map + ahi.header_len, numbytes - ahi.header_len,
-		ahi.block_align, afhi);
+	wma_make_chunk_table(map, numbytes, ahi.block_align, afhi);
 	return 0;
 }
 
diff --git a/wma_common.c b/wma_common.c
index 5ea92c73..be195e66 100644
--- a/wma_common.c
+++ b/wma_common.c
@@ -25,8 +25,6 @@ const char *search_pattern(const char *pattern, int pattern_len, const char *buf
 {
 	const char *p, *end = buf + buf_size;
 
-	if (pattern_len > buf_size)
-		return NULL;
 	for (p = buf; p + pattern_len < end; p++) {
 		if (memcmp(p, pattern, pattern_len))
 			continue;
@@ -80,6 +78,7 @@ int read_asf_header(char *buf, int loaded, struct asf_header_info *ahi)
 	ret = find_audio_stream_info(buf, ahi->header_len);
 	if (ret < 0)
 		return ret;
+	/* FIXME: Check ranges */
 	ahi->audio_stream_info_start = ret + 16;
 	start = buf + ahi->audio_stream_info_start;