ac3: move ff_ac3_bit_alloc_calc_bap to ac3dsp

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/libavcodec/ac3dsp.c b/libavcodec/ac3dsp.c
index 42b44f7db8..77250a351b 100644
--- a/libavcodec/ac3dsp.c
+++ b/libavcodec/ac3dsp.c
@@ -20,6 +20,7 @@
  */
 
 #include "avcodec.h"
+#include "ac3.h"
 #include "ac3dsp.h"
 
 static void ac3_exponent_min_c(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
@@ -101,6 +102,31 @@ static void float_to_fixed24_c(int32_t *dst, const float *src, unsigned int len)
     } while (len > 0);
 }
 
+static void ac3_bit_alloc_calc_bap_c(int16_t *mask, int16_t *psd,
+                                     int start, int end,
+                                     int snr_offset, int floor,
+                                     const uint8_t *bap_tab, uint8_t *bap)
+{
+    int bin, band;
+
+    /* special case, if snr offset is -960, set all bap's to zero */
+    if (snr_offset == -960) {
+        memset(bap, 0, AC3_MAX_COEFS);
+        return;
+    }
+
+    bin  = start;
+    band = ff_ac3_bin_to_band_tab[start];
+    do {
+        int m = (FFMAX(mask[band] - snr_offset - floor, 0) & 0x1FE0) + floor;
+        int band_end = FFMIN(ff_ac3_band_start_tab[band+1], end);
+        for (; bin < band_end; bin++) {
+            int address = av_clip((psd[bin] - m) >> 5, 0, 63);
+            bap[bin] = bap_tab[address];
+        }
+    } while (end > ff_ac3_band_start_tab[band++]);
+}
+
 av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact)
 {
     c->ac3_exponent_min = ac3_exponent_min_c;
@@ -108,6 +134,7 @@ av_cold void ff_ac3dsp_init(AC3DSPContext *c, int bit_exact)
     c->ac3_lshift_int16 = ac3_lshift_int16_c;
     c->ac3_rshift_int32 = ac3_rshift_int32_c;
     c->float_to_fixed24 = float_to_fixed24_c;
+    c->bit_alloc_calc_bap = ac3_bit_alloc_calc_bap_c;
 
     if (ARCH_ARM)
         ff_ac3dsp_init_arm(c, bit_exact);