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SimplifySegments: quiet -Warray-bounds warning

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the number of segments are previously validated, but an explicit check
is needed to avoid a warning under gcc-4.9
this is similar to the changes made in:
c8a87bb AssignSegments: quiet -Warray-bounds warning
3e7f34a AssignSegments: quiet array-bounds warning

Change-Id: Iec7d470be424390c66f769a19576021d0cd9a2fd
This commit is contained in:
James Zern 2016-04-29 19:02:07 -07:00
parent de47492e91
commit 9629f4bcda
1 changed files with 6 additions and 1 deletions
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7
src/enc/quant.c
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@ -360,7 +360,12 @@ static int SegmentsAreEquivalent(const VP8SegmentInfo* const S1,
static void SimplifySegments(VP8Encoder* const enc) { static void SimplifySegments(VP8Encoder* const enc) {
int map[NUM_MB_SEGMENTS] = { 0, 1, 2, 3 }; int map[NUM_MB_SEGMENTS] = { 0, 1, 2, 3 };
const int num_segments = enc->segment_hdr_.num_segments_; // 'num_segments_' is previously validated and <= NUM_MB_SEGMENTS, but an
// explicit check is needed to avoid a spurious warning about 'i' exceeding
// array bounds of 'dqm_' with some compilers (noticed with gcc-4.9).
const int num_segments = (enc->segment_hdr_.num_segments_ < NUM_MB_SEGMENTS)
? enc->segment_hdr_.num_segments_
: NUM_MB_SEGMENTS;
int num_final_segments = 1; int num_final_segments = 1;
int s1, s2; int s1, s2;
for (s1 = 1; s1 < num_segments; ++s1) { // find similar segments for (s1 = 1; s1 < num_segments; ++s1) { // find similar segments