Merge commit 'e25cac50e05d29a15d7a52c01c394ba913c97aee'
[ffmpeg.git] / libswresample / resample_template.c
index 4060c66..d71efd6 100644 (file)
  * @author Michael Niedermayer <michaelni@gmx.at>
  */
 
-int RENAME(swri_resample)(ResampleContext *c, DELEM *dst, const DELEM *src, int *consumed, int src_size, int dst_size, int update_ctx){
-    int dst_index, i;
+#if defined(TEMPLATE_RESAMPLE_DBL)
+
+#    define RENAME(N) N ## _double
+#    define FILTER_SHIFT 0
+#    define DELEM  double
+#    define FELEM  double
+#    define FELEM2 double
+#    define OUT(d, v) d = v
+
+#elif    defined(TEMPLATE_RESAMPLE_FLT)
+
+#    define RENAME(N) N ## _float
+#    define FILTER_SHIFT 0
+#    define DELEM  float
+#    define FELEM  float
+#    define FELEM2 float
+#    define OUT(d, v) d = v
+
+#elif defined(TEMPLATE_RESAMPLE_S32)
+
+#    define RENAME(N) N ## _int32
+#    define FILTER_SHIFT 30
+#    define DELEM  int32_t
+#    define FELEM  int32_t
+#    define FELEM2 int64_t
+#    define FELEM_MAX INT32_MAX
+#    define FELEM_MIN INT32_MIN
+#    define OUT(d, v) (v) = ((v) + (1<<(FILTER_SHIFT-1)))>>FILTER_SHIFT;\
+                      (d) = av_clipl_int32(v)
+
+#elif    defined(TEMPLATE_RESAMPLE_S16)
+
+#    define RENAME(N) N ## _int16
+#    define FILTER_SHIFT 15
+#    define DELEM  int16_t
+#    define FELEM  int16_t
+#    define FELEM2 int32_t
+#    define FELEML int64_t
+#    define FELEM_MAX INT16_MAX
+#    define FELEM_MIN INT16_MIN
+#    define OUT(d, v) (v) = ((v) + (1<<(FILTER_SHIFT-1)))>>FILTER_SHIFT;\
+                      (d) = av_clip_int16(v)
+
+#endif
+
+static void RENAME(resample_one)(void *dest, const void *source,
+                                 int dst_size, int64_t index2, int64_t incr)
+{
+    DELEM *dst = dest;
+    const DELEM *src = source;
+    int dst_index;
+
+    for (dst_index = 0; dst_index < dst_size; dst_index++) {
+        dst[dst_index] = src[index2 >> 32];
+        index2 += incr;
+    }
+}
+
+static int RENAME(resample_common)(ResampleContext *c,
+                                   void *dest, const void *source,
+                                   int n, int update_ctx)
+{
+    DELEM *dst = dest;
+    const DELEM *src = source;
+    int dst_index;
     int index= c->index;
     int frac= c->frac;
-    int dst_incr_frac= c->dst_incr % c->src_incr;
-    int dst_incr=      c->dst_incr / c->src_incr;
-    int compensation_distance= c->compensation_distance;
+    int sample_index = index >> c->phase_shift;
 
-    av_assert1(c->filter_shift == FILTER_SHIFT);
-    av_assert1(c->felem_size == sizeof(FELEM));
+    index &= c->phase_mask;
+    for (dst_index = 0; dst_index < n; dst_index++) {
+        FELEM *filter = ((FELEM *) c->filter_bank) + c->filter_alloc * index;
 
-    if(compensation_distance == 0 && c->filter_length == 1 && c->phase_shift==0){
-        int64_t index2= ((int64_t)index)<<32;
-        int64_t incr= (1LL<<32) * c->dst_incr / c->src_incr;
-        dst_size= FFMIN(dst_size, (src_size-1-index) * (int64_t)c->src_incr / c->dst_incr);
+        FELEM2 val=0;
+        int i;
+        for (i = 0; i < c->filter_length; i++) {
+            val += src[sample_index + i] * (FELEM2)filter[i];
+        }
+        OUT(dst[dst_index], val);
 
-        for(dst_index=0; dst_index < dst_size; dst_index++){
-            dst[dst_index] = src[index2>>32];
-            index2 += incr;
+        frac  += c->dst_incr_mod;
+        index += c->dst_incr_div;
+        if (frac >= c->src_incr) {
+            frac -= c->src_incr;
+            index++;
         }
-        index += dst_index * dst_incr;
-        index += (frac + dst_index * (int64_t)dst_incr_frac) / c->src_incr;
-        frac   = (frac + dst_index * (int64_t)dst_incr_frac) % c->src_incr;
-    }else if(compensation_distance == 0 && !c->linear && index >= 0){
-        for(dst_index=0; dst_index < dst_size; dst_index++){
-            FELEM *filter= ((FELEM*)c->filter_bank) + c->filter_length*(index & c->phase_mask);
-            int sample_index= index >> c->phase_shift;
-
-            if(sample_index + c->filter_length > src_size){
-                break;
-            }else{
-                FELEM2 val=0;
-                for(i=0; i<c->filter_length; i++){
-                    val += src[sample_index + i] * (FELEM2)filter[i];
-                }
-                OUT(dst[dst_index], val);
-            }
-
-            frac += dst_incr_frac;
-            index += dst_incr;
-            if(frac >= c->src_incr){
-                frac -= c->src_incr;
-                index++;
-            }
+        sample_index += index >> c->phase_shift;
+        index &= c->phase_mask;
+    }
+
+    if(update_ctx){
+        c->frac= frac;
+        c->index= index;
+    }
+
+    return sample_index;
+}
+
+static int RENAME(resample_linear)(ResampleContext *c,
+                                   void *dest, const void *source,
+                                   int n, int update_ctx)
+{
+    DELEM *dst = dest;
+    const DELEM *src = source;
+    int dst_index;
+    int index= c->index;
+    int frac= c->frac;
+    int sample_index = index >> c->phase_shift;
+#if FILTER_SHIFT == 0
+    double inv_src_incr = 1.0 / c->src_incr;
+#endif
+
+    index &= c->phase_mask;
+    for (dst_index = 0; dst_index < n; dst_index++) {
+        FELEM *filter = ((FELEM *) c->filter_bank) + c->filter_alloc * index;
+        FELEM2 val=0, v2 = 0;
+
+        int i;
+        for (i = 0; i < c->filter_length; i++) {
+            val += src[sample_index + i] * (FELEM2)filter[i];
+            v2  += src[sample_index + i] * (FELEM2)filter[i + c->filter_alloc];
         }
-    }else{
-        for(dst_index=0; dst_index < dst_size; dst_index++){
-            FELEM *filter= ((FELEM*)c->filter_bank) + c->filter_length*(index & c->phase_mask);
-            int sample_index= index >> c->phase_shift;
-            FELEM2 val=0;
-
-            if(sample_index + c->filter_length > src_size || -sample_index >= src_size){
-                break;
-            }else if(sample_index < 0){
-                for(i=0; i<c->filter_length; i++)
-                    val += src[FFABS(sample_index + i)] * filter[i];
-            }else if(c->linear){
-                FELEM2 v2=0;
-                for(i=0; i<c->filter_length; i++){
-                    val += src[sample_index + i] * (FELEM2)filter[i];
-                    v2  += src[sample_index + i] * (FELEM2)filter[i + c->filter_length];
-                }
-                val+=(v2-val)*(FELEML)frac / c->src_incr;
-            }else{
-                for(i=0; i<c->filter_length; i++){
-                    val += src[sample_index + i] * (FELEM2)filter[i];
-                }
-            }
-
-            OUT(dst[dst_index], val);
-
-            frac += dst_incr_frac;
-            index += dst_incr;
-            if(frac >= c->src_incr){
-                frac -= c->src_incr;
-                index++;
-            }
-
-            if(dst_index + 1 == compensation_distance){
-                compensation_distance= 0;
-                dst_incr_frac= c->ideal_dst_incr % c->src_incr;
-                dst_incr=      c->ideal_dst_incr / c->src_incr;
-            }
+#ifdef FELEML
+        val += (v2 - val) * (FELEML) frac / c->src_incr;
+#else
+#    if FILTER_SHIFT == 0
+        val += (v2 - val) * inv_src_incr * frac;
+#    else
+        val += (v2 - val) / c->src_incr * frac;
+#    endif
+#endif
+        OUT(dst[dst_index], val);
+
+        frac += c->dst_incr_mod;
+        index += c->dst_incr_div;
+        if (frac >= c->src_incr) {
+            frac -= c->src_incr;
+            index++;
         }
+        sample_index += index >> c->phase_shift;
+        index &= c->phase_mask;
     }
-    *consumed= FFMAX(index, 0) >> c->phase_shift;
-    if(index>=0) index &= c->phase_mask;
 
-    if(compensation_distance){
-        compensation_distance -= dst_index;
-        av_assert1(compensation_distance > 0);
-    }
     if(update_ctx){
         c->frac= frac;
         c->index= index;
-        c->dst_incr= dst_incr_frac + c->src_incr*dst_incr;
-        c->compensation_distance= compensation_distance;
-    }
-#if 0
-    if(update_ctx && !c->compensation_distance){
-#undef rand
-        av_resample_compensate(c, rand() % (8000*2) - 8000, 8000*2);
-av_log(NULL, AV_LOG_DEBUG, "%d %d %d\n", c->dst_incr, c->ideal_dst_incr, c->compensation_distance);
     }
-#endif
 
-    return dst_index;
+    return sample_index;
 }
+
+#undef RENAME
+#undef FILTER_SHIFT
+#undef DELEM
+#undef FELEM
+#undef FELEM2
+#undef FELEML
+#undef FELEM_MAX
+#undef FELEM_MIN
+#undef OUT