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swr: use memcpy when input and output match

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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1 parent 106789d commit 9f98a8e9bc9b669f348834908dce927a2a5d9b90 @michaelni michaelni committed Apr 29, 2012
Showing with 7 additions and 0 deletions.
  1. +7 −0 libswresample/audioconvert.c
@@ -107,6 +107,10 @@ static conv_func_type * const fmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB*AV_SAM
FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL),
};
+static void cpy(uint8_t **dst, const uint8_t **src, int len){
+ memcpy(*dst, *src, len);
+}
+
AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt,
enum AVSampleFormat in_fmt,
int channels, const int *ch_map,
@@ -126,6 +130,9 @@ AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt,
if (in_fmt == AV_SAMPLE_FMT_U8)
memset(ctx->silence, 0x80, sizeof(ctx->silence));
+ if(out_fmt == in_fmt && !ch_map)
+ ctx->simd_f = cpy;
+
if(HAVE_YASM && HAVE_MMX) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);
return ctx;

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