Merge remote-tracking branch 'qatar/master'

* qatar/master:
  vf_drawtext: Replace FFmpeg by Libav in license boilerplate.
  mpegaudiodec: remove unusued code and variables
  improved 'edts' atom writing support
  mpegaudio: clean up compute_antialias() definition
  vp8: fix segmentation race during frame-threading.

Merged-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 40 insertions, 56 deletions

diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index 4500739..6a3b6f9 100644
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -112,8 +112,6 @@ typedef struct MPADecodeContext {
 #include "mpegaudiodata.h"
 #include "mpegaudiodectab.h"
 
-static void RENAME(compute_antialias)(MPADecodeContext *s, GranuleDef *g);
-
 /* vlc structure for decoding layer 3 huffman tables */
 static VLC huff_vlc[16];
 static VLC_TYPE huff_vlc_tables[
@@ -135,8 +133,7 @@ static uint16_t band_index_long[9][23];
 /* intensity stereo coef table */
 static INTFLOAT is_table[2][16];
 static INTFLOAT is_table_lsf[2][2][16];
-static int32_t csa_table[8][4];
-static float csa_table_float[8][4];
+static INTFLOAT csa_table[8][4];
 static INTFLOAT mdct_win[8][36];
 
 static int16_t division_tab3[1<<6 ];
@@ -272,27 +269,6 @@ static inline int l3_unscale(int value, int exponent)
     return m;
 }
 
-/* all integer n^(4/3) computation code */
-#define DEV_ORDER 13
-
-#define POW_FRAC_BITS 24
-#define POW_FRAC_ONE    (1 << POW_FRAC_BITS)
-#define POW_FIX(a)   ((int)((a) * POW_FRAC_ONE))
-#define POW_MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> POW_FRAC_BITS)
-
-static int dev_4_3_coefs[DEV_ORDER];
-
-static av_cold void int_pow_init(void)
-{
-    int i, a;
-
-    a = POW_FIX(1.0);
-    for(i=0;i<DEV_ORDER;i++) {
-        a = POW_MULL(a, POW_FIX(4.0 / 3.0) - i * POW_FIX(1.0)) / (i + 1);
-        dev_4_3_coefs[i] = a;
-    }
-}
-
 static av_cold int decode_init(AVCodecContext * avctx)
 {
     MPADecodeContext *s = avctx->priv_data;
@@ -388,7 +364,6 @@ static av_cold int decode_init(AVCodecContext * avctx)
 
         /* compute n ^ (4/3) and store it in mantissa/exp format */
 
-        int_pow_init();
         mpegaudio_tableinit();
 
         for (i = 0; i < 4; i++)
@@ -441,14 +416,17 @@ static av_cold int decode_init(AVCodecContext * avctx)
             ci = ci_table[i];
             cs = 1.0 / sqrt(1.0 + ci * ci);
             ca = cs * ci;
+#if !CONFIG_FLOAT
             csa_table[i][0] = FIXHR(cs/4);
             csa_table[i][1] = FIXHR(ca/4);
             csa_table[i][2] = FIXHR(ca/4) + FIXHR(cs/4);
             csa_table[i][3] = FIXHR(ca/4) - FIXHR(cs/4);
-            csa_table_float[i][0] = cs;
-            csa_table_float[i][1] = ca;
-            csa_table_float[i][2] = ca + cs;
-            csa_table_float[i][3] = ca - cs;
+#else
+            csa_table[i][0] = cs;
+            csa_table[i][1] = ca;
+            csa_table[i][2] = ca + cs;
+            csa_table[i][3] = ca - cs;
+#endif
         }
 
         /* compute mdct windows */
@@ -1335,10 +1313,26 @@ static void compute_stereo(MPADecodeContext *s,
     }
 }
 
-#if !CONFIG_FLOAT
-static void compute_antialias_fixed(MPADecodeContext *s, GranuleDef *g)
+#if CONFIG_FLOAT
+#define AA(j) do {                                                      \
+        float tmp0 = ptr[-1-j];                                         \
+        float tmp1 = ptr[   j];                                         \
+        ptr[-1-j] = tmp0 * csa_table[j][0] - tmp1 * csa_table[j][1];    \
+        ptr[   j] = tmp0 * csa_table[j][1] + tmp1 * csa_table[j][0];    \
+    } while (0)
+#else
+#define AA(j) do {                                              \
+        int tmp0 = ptr[-1-j];                                   \
+        int tmp1 = ptr[   j];                                   \
+        int tmp2 = MULH(tmp0 + tmp1, csa_table[j][0]);          \
+        ptr[-1-j] = 4*(tmp2 - MULH(tmp1, csa_table[j][2]));     \
+        ptr[   j] = 4*(tmp2 + MULH(tmp0, csa_table[j][3]));     \
+    } while (0)
+#endif
+
+static void compute_antialias(MPADecodeContext *s, GranuleDef *g)
 {
-    int32_t *ptr, *csa;
+    INTFLOAT *ptr;
     int n, i;
 
     /* we antialias only "long" bands */
@@ -1353,28 +1347,18 @@ static void compute_antialias_fixed(MPADecodeContext *s, GranuleDef *g)
 
     ptr = g->sb_hybrid + 18;
     for(i = n;i > 0;i--) {
-        int tmp0, tmp1, tmp2;
-        csa = &csa_table[0][0];
-#define INT_AA(j) \
-            tmp0 = ptr[-1-j];\
-            tmp1 = ptr[   j];\
-            tmp2= MULH(tmp0 + tmp1, csa[0+4*j]);\
-            ptr[-1-j] = 4*(tmp2 - MULH(tmp1, csa[2+4*j]));\
-            ptr[   j] = 4*(tmp2 + MULH(tmp0, csa[3+4*j]));
-
-        INT_AA(0)
-        INT_AA(1)
-        INT_AA(2)
-        INT_AA(3)
-        INT_AA(4)
-        INT_AA(5)
-        INT_AA(6)
-        INT_AA(7)
+        AA(0);
+        AA(1);
+        AA(2);
+        AA(3);
+        AA(4);
+        AA(5);
+        AA(6);
+        AA(7);
 
         ptr += 18;
     }
 }
-#endif
 
 static void compute_imdct(MPADecodeContext *s,
                           GranuleDef *g,
@@ -1470,7 +1454,7 @@ static void compute_imdct(MPADecodeContext *s,
 /* main layer3 decoding function */
 static int mp_decode_layer3(MPADecodeContext *s)
 {
-    int nb_granules, main_data_begin, private_bits;
+    int nb_granules, main_data_begin;
     int gr, ch, blocksplit_flag, i, j, k, n, bits_pos;
     GranuleDef *g;
     int16_t exponents[576]; //FIXME try INTFLOAT
@@ -1478,14 +1462,14 @@ static int mp_decode_layer3(MPADecodeContext *s)
     /* read side info */
     if (s->lsf) {
         main_data_begin = get_bits(&s->gb, 8);
-        private_bits = get_bits(&s->gb, s->nb_channels);
+        skip_bits(&s->gb, s->nb_channels);
         nb_granules = 1;
     } else {
         main_data_begin = get_bits(&s->gb, 9);
         if (s->nb_channels == 2)
-            private_bits = get_bits(&s->gb, 3);
+            skip_bits(&s->gb, 3);
         else
-            private_bits = get_bits(&s->gb, 5);
+            skip_bits(&s->gb, 5);
         nb_granules = 2;
         for(ch=0;ch<s->nb_channels;ch++) {
             s->granules[ch][0].scfsi = 0;/* all scale factors are transmitted */
@@ -1703,7 +1687,7 @@ static int mp_decode_layer3(MPADecodeContext *s)
             g = &s->granules[ch][gr];
 
             reorder_block(s, g);
-            RENAME(compute_antialias)(s, g);
+            compute_antialias(s, g);
             compute_imdct(s, g, &s->sb_samples[ch][18 * gr][0], s->mdct_buf[ch]);
         }
     } /* gr */