[SCM] libav/experimental: Add several vector functions used by Monkey's Audio decoder to dsputil

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 88c0536a4217e3d88feddd91b74e7db6f752d301
Author: Kostya Shishkov <kostya.shishkov at gmail.com>
Date:   Sun Jul 6 06:06:55 2008 +0000

    Add several vector functions used by Monkey's Audio decoder to dsputil
    
    Originally committed as revision 14081 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c
index 4cc90f2..c4aa38f 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -161,29 +161,6 @@ typedef struct APEContext {
 } APEContext;
 
 // TODO: dsputilize
-static inline void vector_add(int16_t * v1, int16_t * v2, int order)
-{
-    while (order--)
-       *v1++ += *v2++;
-}
-
-// TODO: dsputilize
-static inline void vector_sub(int16_t * v1, int16_t * v2, int order)
-{
-    while (order--)
-        *v1++ -= *v2++;
-}
-
-// TODO: dsputilize
-static inline int32_t scalarproduct(int16_t * v1, int16_t * v2, int order)
-{
-    int res = 0;
-
-    while (order--)
-        res += *v1++ * *v2++;
-
-    return res;
-}
 
 static av_cold int ape_decode_init(AVCodecContext * avctx)
 {
@@ -672,19 +649,19 @@ static void init_filter(APEContext * ctx, APEFilter *f, int16_t * buf, int order
     do_init_filter(&f[1], buf + order * 3 + HISTORY_SIZE, order);
 }
 
-static inline void do_apply_filter(int version, APEFilter *f, int32_t *data, int count, int order, int fracbits)
+static inline void do_apply_filter(APEContext * ctx, int version, APEFilter *f, int32_t *data, int count, int order, int fracbits)
 {
     int res;
     int absres;
 
     while (count--) {
         /* round fixedpoint scalar product */
-        res = (scalarproduct(f->delay - order, f->coeffs, order) + (1 << (fracbits - 1))) >> fracbits;
+        res = (ctx->dsp.scalarproduct_int16(f->delay - order, f->coeffs, order, 0) + (1 << (fracbits - 1))) >> fracbits;
 
         if (*data < 0)
-            vector_add(f->coeffs, f->adaptcoeffs - order, order);
+            ctx->dsp.add_int16(f->coeffs, f->adaptcoeffs - order, order);
         else if (*data > 0)
-            vector_sub(f->coeffs, f->adaptcoeffs - order, order);
+            ctx->dsp.sub_int16(f->coeffs, f->adaptcoeffs - order, order);
 
         res += *data;
 
@@ -736,9 +713,9 @@ static void apply_filter(APEContext * ctx, APEFilter *f,
                          int32_t * data0, int32_t * data1,
                          int count, int order, int fracbits)
 {
-    do_apply_filter(ctx->fileversion, &f[0], data0, count, order, fracbits);
+    do_apply_filter(ctx, ctx->fileversion, &f[0], data0, count, order, fracbits);
     if (data1)
-        do_apply_filter(ctx->fileversion, &f[1], data1, count, order, fracbits);
+        do_apply_filter(ctx, ctx->fileversion, &f[1], data1, count, order, fracbits);
 }
 
 static void ape_apply_filters(APEContext * ctx, int32_t * decoded0,
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 80efd07..4c07f7e 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -3944,6 +3944,28 @@ void ff_float_to_int16_c(int16_t *dst, const float *src, int len){
     }
 }
 
+static void add_int16_c(int16_t * v1, int16_t * v2, int order)
+{
+    while (order--)
+       *v1++ += *v2++;
+}
+
+static void sub_int16_c(int16_t * v1, int16_t * v2, int order)
+{
+    while (order--)
+        *v1++ -= *v2++;
+}
+
+static int32_t scalarproduct_int16_c(int16_t * v1, int16_t * v2, int order, int shift)
+{
+    int res = 0;
+
+    while (order--)
+        res += (*v1++ * *v2++) >> shift;
+
+    return res;
+}
+
 #define W0 2048
 #define W1 2841 /* 2048*sqrt (2)*cos (1*pi/16) */
 #define W2 2676 /* 2048*sqrt (2)*cos (2*pi/16) */
@@ -4429,6 +4451,9 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx)
     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->add_int16 = add_int16_c;
+    c->sub_int16 = sub_int16_c;
+    c->scalarproduct_int16 = scalarproduct_int16_c;
 
     c->shrink[0]= ff_img_copy_plane;
     c->shrink[1]= ff_shrink22;
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index 3b7b879..bd792fe 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -451,6 +451,23 @@ typedef struct DSPContext {
     void (*x8_setup_spatial_compensation)(uint8_t *src, uint8_t *dst, int linesize,
            int * range, int * sum,  int edges);
 
+    /* ape functions */
+    /**
+     * Add contents of the second vector to the first one.
+     * @param len length of vectors, should be multiple of 8
+     */
+    void (*add_int16)(int16_t *v1/*align 16*/, int16_t *v2, int len);
+    /**
+     * Add contents of the second vector to the first one.
+     * @param len length of vectors, should be multiple of 8
+     */
+    void (*sub_int16)(int16_t *v1/*align 16*/, int16_t *v2, int len);
+    /**
+     * Calculate scalar product of two vectors.
+     * @param len length of vectors, should be multiple of 8
+     * @param shift number of bits to discard from product
+     */
+    int32_t (*scalarproduct_int16)(int16_t *v1, int16_t *v2/*align 16*/, int len, int shift);
 } DSPContext;
 
 void dsputil_static_init(void);

-- 
Libav/FFmpeg packaging