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-rw-r--r--libswresample/resample_template.c211
1 files changed, 211 insertions, 0 deletions
diff --git a/libswresample/resample_template.c b/libswresample/resample_template.c
new file mode 100644
index 0000000000..5bc12bcb71
--- /dev/null
+++ b/libswresample/resample_template.c
@@ -0,0 +1,211 @@
+/*
+ * audio resampling
+ * Copyright (c) 2004-2012 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * audio resampling
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#if defined(TEMPLATE_RESAMPLE_DBL)
+# define RENAME(N) N ## _double
+# define FILTER_SHIFT 0
+# define DELEM double
+# define FELEM double
+# define FELEM2 double
+# define FELEML 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 FELEML 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 FELEML 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 = (uint64_t)(v + 0x80000000) > 0xFFFFFFFF ? (v>>63) ^ 0x7FFFFFFF : v
+
+#elif defined(TEMPLATE_RESAMPLE_S16) \
+ || defined(TEMPLATE_RESAMPLE_S16_MMX2) \
+ || defined(TEMPLATE_RESAMPLE_S16_SSSE3)
+
+# 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 = (unsigned)(v + 32768) > 65535 ? (v>>31) ^ 32767 : v
+
+# if defined(TEMPLATE_RESAMPLE_S16)
+# define RENAME(N) N ## _int16
+# elif defined(TEMPLATE_RESAMPLE_S16_MMX2)
+# define COMMON_CORE COMMON_CORE_INT16_MMX2
+# define RENAME(N) N ## _int16_mmx2
+# elif defined(TEMPLATE_RESAMPLE_S16_SSSE3)
+# define COMMON_CORE COMMON_CORE_INT16_SSSE3
+# define RENAME(N) N ## _int16_ssse3
+# endif
+
+#endif
+
+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;
+ 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;
+
+ av_assert1(c->filter_shift == FILTER_SHIFT);
+ av_assert1(c->felem_size == sizeof(FELEM));
+
+ 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);
+
+ for(dst_index=0; dst_index < dst_size; dst_index++){
+ dst[dst_index] = src[index2>>32];
+ index2 += incr;
+ }
+ 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;
+ av_assert2(index >= 0);
+ *consumed= index >> c->phase_shift;
+ index &= c->phase_mask;
+ }else if(compensation_distance == 0 && !c->linear && index >= 0){
+ int sample_index = 0;
+ for(dst_index=0; dst_index < dst_size; dst_index++){
+ FELEM *filter;
+ sample_index += index >> c->phase_shift;
+ index &= c->phase_mask;
+ filter= ((FELEM*)c->filter_bank) + c->filter_alloc*index;
+
+ if(sample_index + c->filter_length > src_size){
+ break;
+ }else{
+#ifdef COMMON_CORE
+ COMMON_CORE
+#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);
+#endif
+ }
+
+ frac += dst_incr_frac;
+ index += dst_incr;
+ if(frac >= c->src_incr){
+ frac -= c->src_incr;
+ index++;
+ }
+ }
+ *consumed = sample_index;
+ }else{
+ int sample_index = 0;
+ for(dst_index=0; dst_index < dst_size; dst_index++){
+ FELEM *filter;
+ FELEM2 val=0;
+
+ sample_index += index >> c->phase_shift;
+ index &= c->phase_mask;
+ filter = ((FELEM*)c->filter_bank) + c->filter_alloc*index;
+
+ 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)] * (FELEM2)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_alloc];
+ }
+ 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;
+ }
+ }
+ *consumed= FFMAX(sample_index, 0);
+ index += FFMIN(sample_index, 0) << c->phase_shift;
+
+ 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;
+ }
+
+ return dst_index;
+}
+
+#undef COMMON_CORE
+#undef RENAME
+#undef FILTER_SHIFT
+#undef DELEM
+#undef FELEM
+#undef FELEM2
+#undef FELEML
+#undef FELEM_MAX
+#undef FELEM_MIN
+#undef OUT
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