configure: add decimate filter dependency on avcodec

[ffmpeg] / libswresample / rematrix_template.c

diff --git a/libswresample/rematrix_template.c b/libswresample/rematrix_template.c
index 0b5123c1cb3160fba83ef9a421c58fa8c9e92142..b3ed87e65f678e83071bbbb0f6ba93733223edf9 100644 (file)
--- a/libswresample/rematrix_template.c
+++ b/libswresample/rematrix_template.c
@@ -18,6 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+typedef void (RENAME(mix_any_func_type))(SAMPLE **out, const SAMPLE **in1, COEFF *coeffp, int len);
 
 static void RENAME(sum2)(SAMPLE *out, const SAMPLE *in1, const SAMPLE *in2, COEFF *coeffp, int index1, int index2, int len){
     int i;
@@ -35,3 +36,39 @@ static void RENAME(copy)(SAMPLE *out, const SAMPLE *in, COEFF *coeffp, int index
         out[i] = R(coeff*in[i]);
 }
 
+static void RENAME(mix6to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, int len){
+    int i;
+
+    for(i=0; i<len; i++) {
+        INTER t = in[2][i]*coeffp[0*6+2] + in[3][i]*coeffp[0*6+3];
+        out[0][i] = R(t + in[0][i]*coeffp[0*6+0] + in[4][i]*coeffp[0*6+4]);
+        out[1][i] = R(t + in[1][i]*coeffp[1*6+1] + in[5][i]*coeffp[1*6+5]);
+    }
+}
+
+static void RENAME(mix8to2)(SAMPLE **out, const SAMPLE **in, COEFF *coeffp, int len){
+    int i;
+
+    for(i=0; i<len; i++) {
+        INTER t = in[2][i]*coeffp[0*8+2] + in[3][i]*coeffp[0*8+3];
+        out[0][i] = R(t + in[0][i]*coeffp[0*8+0] + in[4][i]*coeffp[0*8+4] + in[6][i]*coeffp[0*8+6]);
+        out[1][i] = R(t + in[1][i]*coeffp[1*8+1] + in[5][i]*coeffp[1*8+5] + in[7][i]*coeffp[1*8+7]);
+    }
+}
+
+static RENAME(mix_any_func_type) *RENAME(get_mix_any_func)(SwrContext *s){
+    if(   s->out_ch_layout == AV_CH_LAYOUT_STEREO && (s->in_ch_layout == AV_CH_LAYOUT_5POINT1 || s->in_ch_layout == AV_CH_LAYOUT_5POINT1_BACK)
+       && s->matrix[0][2] == s->matrix[1][2] && s->matrix[0][3] == s->matrix[1][3]
+       && !s->matrix[0][1] && !s->matrix[0][5] && !s->matrix[1][0] && !s->matrix[1][4]
+    )
+        return RENAME(mix6to2);
+
+    if(   s->out_ch_layout == AV_CH_LAYOUT_STEREO && s->in_ch_layout == AV_CH_LAYOUT_7POINT1
+       && s->matrix[0][2] == s->matrix[1][2] && s->matrix[0][3] == s->matrix[1][3]
+       && !s->matrix[0][1] && !s->matrix[0][5] && !s->matrix[1][0] && !s->matrix[1][4]
+       && !s->matrix[0][7] && !s->matrix[1][6]
+    )
+        return RENAME(mix8to2);
+
+    return NULL;
+}