sse and 3dnow implementations of float->int conversion and mdct windowing.

15% faster vorbis.

Originally committed as revision 5975 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 37 insertions, 0 deletions

diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 937dceb2c4..bba233b1c6 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -3753,6 +3753,39 @@ WARPER8_16_SQ(quant_psnr8x8_c, quant_psnr16_c)
 WARPER8_16_SQ(rd8x8_c, rd16_c)
 WARPER8_16_SQ(bit8x8_c, bit16_c)
 
+static void vector_fmul_c(float *dst, const float *src, int len){
+    int i;
+    for(i=0; i<len; i++)
+        dst[i] *= src[i];
+}
+
+static void vector_fmul_reverse_c(float *dst, const float *src0, const float *src1, int len){
+    int i;
+    src1 += len-1;
+    for(i=0; i<len; i++)
+        dst[i] = src0[i] * src1[-i];
+}
+
+void ff_vector_fmul_add_add_c(float *dst, const float *src0, const float *src1, const float *src2, int src3, int len, int step){
+    int i;
+    for(i=0; i<len; i++)
+        dst[i*step] = src0[i] * src1[i] + src2[i] + src3;
+}
+
+void ff_float_to_int16_c(int16_t *dst, const float *src, int len){
+    int i;
+    for(i=0; i<len; i++) {
+        int_fast32_t tmp = ((int32_t*)src)[i];
+        if(tmp & 0xf0000){
+            tmp = (0x43c0ffff - tmp)>>31;
+            // is this faster on some gcc/cpu combinations?
+//          if(tmp > 0x43c0ffff) tmp = 0xFFFF;
+//          else                 tmp = 0;
+        }
+        dst[i] = tmp - 0x8000;
+    }
+}
+
 /* XXX: those functions should be suppressed ASAP when all IDCTs are
  converted */
 static void ff_jref_idct_put(uint8_t *dest, int line_size, DCTELEM *block)
@@ -4096,6 +4129,10 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
 #ifdef CONFIG_VORBIS_DECODER
     c->vorbis_inverse_coupling = vorbis_inverse_coupling;
 #endif
+    c->vector_fmul = vector_fmul_c;
+    c->vector_fmul_reverse = vector_fmul_reverse_c;
+    c->vector_fmul_add_add = ff_vector_fmul_add_add_c;
+    c->float_to_int16 = ff_float_to_int16_c;
 
     c->shrink[0]= ff_img_copy_plane;
     c->shrink[1]= ff_shrink22;