aacenc: fix out of array writes

[ffmpeg] / libavcodec / celp_math.c

diff --git a/libavcodec/celp_math.c b/libavcodec/celp_math.c
index e9bb0d3892a1d5b7c1a706f3335254f9a7cb30d1..56dc86379eb6d630592073873e237924fafdb52b 100644 (file)
--- a/libavcodec/celp_math.c
+++ b/libavcodec/celp_math.c
@@ -29,97 +29,6 @@
 #include "celp_math.h"
 #include "libavutil/common.h"
 
-#ifdef G729_BITEXACT
-/**
- * Cosine table: base_cos[i] = (1<<15) * cos(i*PI/64)
- */
-static const int16_t base_cos[64] =
-{
-  32767,  32729,  32610,  32413,  32138,  31786,  31357,  30853,
-  30274,  29622,  28899,  28106,  27246,  26320,  25330,  24279,
-  23170,  22006,  20788,  19520,  18205,  16846,  15447,  14010,
-  12540,  11039,   9512,   7962,   6393,   4808,   3212,   1608,
-      0,  -1608,  -3212,  -4808,  -6393,  -7962,  -9512, -11039,
- -12540, -14010, -15447, -16846, -18205, -19520, -20788, -22006,
- -23170, -24279, -25330, -26320, -27246, -28106, -28899, -29622,
- -30274, -30853, -31357, -31786, -32138, -32413, -32610, -32729
-};
-
-/**
- * Slope used to compute cos(x)
- *
- * cos(ind*64+offset) = base_cos[ind]+offset*slope_cos[ind]
- * values multiplied by 1<<19
- */
-static const int16_t slope_cos[64] =
-{
-   -632,  -1893,  -3150,  -4399,  -5638,  -6863,  -8072,  -9261,
- -10428, -11570, -12684, -13767, -14817, -15832, -16808, -17744,
- -18637, -19486, -20287, -21039, -21741, -22390, -22986, -23526,
- -24009, -24435, -24801, -25108, -25354, -25540, -25664, -25726,
- -25726, -25664, -25540, -25354, -25108, -24801, -24435, -24009,
- -23526, -22986, -22390, -21741, -21039, -20287, -19486, -18637,
- -17744, -16808, -15832, -14817, -13767, -12684, -11570, -10428,
-  -9261,  -8072,  -6863,  -5638,  -4399,  -3150,  -1893,   -632
-};
-
-/**
- * Table used to compute exp2(x)
- *
- * tab_exp2[i] = (1<<14) * exp2(i/32) = 2^(i/32) i=0..32
- */
-static const uint16_t tab_exp2[33] =
-{
-  16384, 16743, 17109, 17484, 17867, 18258, 18658, 19066, 19484, 19911,
-  20347, 20792, 21247, 21713, 22188, 22674, 23170, 23678, 24196, 24726,
-  25268, 25821, 26386, 26964, 27554, 28158, 28774, 29405, 30048, 30706,
-  31379, 32066, 32767
-};
-
-int16_t ff_cos(uint16_t arg)
-{
-    uint8_t offset= arg;
-    uint8_t ind = arg >> 8;
-
-    av_assert2(arg < 0x4000);
-
-    return FFMAX(base_cos[ind] + ((slope_cos[ind] * offset) >> 12), -0x8000);
-}
-
-int ff_exp2(uint16_t power)
-{
-    uint16_t frac_x0;
-    uint16_t frac_dx;
-    int result;
-
-    av_assert2(power <= 0x7fff);
-
-    frac_x0 = power >> 10;
-    frac_dx = (power & 0x03ff) << 5;
-
-    result = tab_exp2[frac_x0] << 15;
-    result += frac_dx * (tab_exp2[frac_x0+1] - tab_exp2[frac_x0]);
-
-    return result >> 10;
-}
-
-#else // G729_BITEXACT
-
-/**
- * Cosine table: base_cos[i] = (1<<15) * cos(i*PI/64)
- */
-static const int16_t tab_cos[65] =
-{
-  32767,  32738,  32617,  32421,  32145,  31793,  31364,  30860,
-  30280,  29629,  28905,  28113,  27252,  26326,  25336,  24285,
-  23176,  22011,  20793,  19525,  18210,  16851,  15451,  14014,
-  12543,  11043,   9515,   7965,   6395,   4810,   3214,   1609,
-      1,  -1607,  -3211,  -4808,  -6393,  -7962,  -9513, -11040,
- -12541, -14012, -15449, -16848, -18207, -19523, -20791, -22009,
- -23174, -24283, -25334, -26324, -27250, -28111, -28904, -29627,
- -30279, -30858, -31363, -31792, -32144, -32419, -32616, -32736, -32768,
-};
-
 static const uint16_t exp2a[]=
 {
      0,  1435,  2901,  4400,  5931,  7496,  9096, 10730,
@@ -136,16 +45,6 @@ static const uint16_t exp2b[]=
  17176, 17898, 18620, 19343, 20066, 20790, 21514, 22238,
 };
 
-int16_t ff_cos(uint16_t arg)
-{
-    uint8_t offset= arg;
-    uint8_t ind = arg >> 8;
-
-    av_assert2(arg <= 0x3fff);
-
-    return tab_cos[ind] + (offset * (tab_cos[ind+1] - tab_cos[ind]) >> 8);
-}
-
 int ff_exp2(uint16_t power)
 {
     unsigned int result= exp2a[power>>10] + 0x10000;
@@ -156,8 +55,6 @@ int ff_exp2(uint16_t power)
     return result + ((result*(power&31)*89)>>22);
 }
 
-#endif // else G729_BITEXACT
-
 /**
  * Table used to compute log2(x)
  *