@@ -110,6 +110,7 @@ void swr_free(SwrContext **ss){

         free_temp(&s->in_buffer);

         swr_audio_convert_free(&s-> in_convert);

         swr_audio_convert_free(&s->out_convert);

+        swr_audio_convert_free(&s->full_convert);

         swr_resample_free(&s->resample);

     }

@@ -138,6 +139,7 @@ int swr_init(SwrContext *s){

     free_temp(&s->in_buffer);

     swr_audio_convert_free(&s-> in_convert);

     swr_audio_convert_free(&s->out_convert);

+    swr_audio_convert_free(&s->full_convert);

     s-> in.planar= s-> in_sample_fmt >= 0x100;

     s->out.planar= s->out_sample_fmt >= 0x100;

@@ -196,6 +198,12 @@ av_assert0(s->out.ch_count);

     s->int_bps= av_get_bits_per_sample_fmt(s->int_sample_fmt)/8;

     s->out.bps= av_get_bits_per_sample_fmt(s->out_sample_fmt)/8;

+    if(!s->resample && !s->rematrix){

+        s->full_convert = swr_audio_convert_alloc(s->out_sample_fmt,

+                                                  s-> in_sample_fmt, s-> in.ch_count, 0);

+        return 0;

+    }

+

     s->in_convert = swr_audio_convert_alloc(s->int_sample_fmt,

                                             s-> in_sample_fmt, s-> in.ch_count, 0);

     s->out_convert= swr_audio_convert_alloc(s->out_sample_fmt,

@@ -291,6 +299,12 @@ int swr_convert(struct SwrContext *s, uint8_t *out_arg[SWR_CH_MAX], int out_coun

     fill_audiodata(in ,  in_arg);

     fill_audiodata(out, out_arg);

+    if(s->full_convert){

+        av_assert0(!s->resample);

+        swr_audio_convert(s->full_convert, out, in, in_count);

+        return out_count;

+    }

+

 //     in_max= out_count*(int64_t)s->in_sample_rate / s->out_sample_rate + resample_filter_taps;

 //     in_count= FFMIN(in_count, in_in + 2 - s->hist_buffer_count);

@@ -58,6 +58,7 @@ typedef struct SwrContext {          //FIXME find unused fields

     struct AVAudioConvert *in_convert;

     struct AVAudioConvert *out_convert;

+    struct AVAudioConvert *full_convert;

     struct AVResampleContext *resample;

     float matrix[SWR_CH_MAX][SWR_CH_MAX];