Commit functions used by both AMRNB and SIPR

Originally committed as revision 20805 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 54 insertions, 0 deletions

diff --git a/libavcodec/acelp_vectors.c b/libavcodec/acelp_vectors.c
index b193d08..b83c270 100644
--- a/libavcodec/acelp_vectors.c
+++ b/libavcodec/acelp_vectors.c
@@ -127,6 +127,26 @@ void ff_acelp_fc_pulse_per_track(
     fc_v[tab2[pulse_indexes]] += (pulse_signs & 1) ? 8191 : -8192;
 }
 
+void ff_decode_10_pulses_35bits(const int16_t *fixed_index,
+                                AMRFixed *fixed_sparse,
+                                const uint8_t *gray_decode,
+                                int half_pulse_count, int bits)
+{
+    int i;
+    int mask = (1 << bits) - 1;
+
+    fixed_sparse->n = 2 * half_pulse_count;
+    for (i = 0; i < half_pulse_count; i++) {
+        const int pos1   = gray_decode[fixed_index[2*i+1] & mask] + i;
+        const int pos2   = gray_decode[fixed_index[2*i  ] & mask] + i;
+        const float sign = (fixed_index[2*i+1] & (1 << bits)) ? -1.0 : 1.0;
+        fixed_sparse->x[2*i+1] = pos1;
+        fixed_sparse->x[2*i  ] = pos2;
+        fixed_sparse->y[2*i+1] = sign;
+        fixed_sparse->y[2*i  ] = pos2 < pos1 ? -sign : sign;
+    }
+}
+
 void ff_acelp_weighted_vector_sum(
         int16_t* out,
         const int16_t *in_a,
@@ -188,3 +208,37 @@ void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in,
     for (i = 0; i < n; i++)
         out[i] = in[i] * scalefactor;
 }
+
+void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size)
+{
+    int i;
+
+    for (i=0; i < in->n; i++) {
+        int x   = in->x[i];
+        float y = in->y[i] * scale;
+        out[x] += y;
+
+        x += in->pitch_lag;
+        while (x < size) {
+            y *= in->pitch_fac;
+            out[x] += y;
+            x += in->pitch_lag;
+        }
+    }
+}
+
+void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size)
+{
+    int i;
+
+    for (i=0; i < in->n; i++) {
+        int x  = in->x[i];
+        out[x] = 0.0;
+
+        x += in->pitch_lag;
+        while (x < size) {
+            out[x] = 0.0;
+            x += in->pitch_lag;
+        }
+    }
+}