swr: mix_1_1 int16 MMX

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

1 files changed, 15 insertions, 0 deletions

diff --git a/libswresample/x86/swresample_x86.c b/libswresample/x86/swresample_x86.c
index 18c601f72e..ba0f1f131a 100644
--- a/libswresample/x86/swresample_x86.c
+++ b/libswresample/x86/swresample_x86.c
@@ -163,6 +163,21 @@ void swri_rematrix_init_x86(struct SwrContext *s){
     s->mix_2_1_simd = NULL;
 
     if (s->midbuf.fmt == AV_SAMPLE_FMT_S16P){
+        if(mm_flags & AV_CPU_FLAG_MMX) {
+            s->mix_1_1_simd = ff_mix_1_1_a_int16_mmx;
+        }
+        s->native_simd_matrix = av_mallocz(2 * num * sizeof(int16_t));
+        for(i=0; i<nb_out; i++){
+            int sh = 0;
+            for(j=0; j<nb_in; j++)
+                sh = FFMAX(sh, FFABS(((int*)s->native_matrix)[i * nb_in + j]));
+            sh = FFMAX(av_log2(sh) - 14, 0);
+            for(j=0; j<nb_in; j++) {
+                ((int16_t*)s->native_simd_matrix)[2*(i * nb_in + j)+1] = 15 - sh;
+                ((int16_t*)s->native_simd_matrix)[2*(i * nb_in + j)] =
+                    ((((int*)s->native_matrix)[i * nb_in + j]) + (1<<sh>>1)) >> sh;
+            }
+        }
     } else if(s->midbuf.fmt == AV_SAMPLE_FMT_FLTP){
         if(mm_flags & AV_CPU_FLAG_SSE) {
             s->mix_1_1_simd = ff_mix_1_1_a_float_sse;