mirror of https://github.com/mpv-player/mpv
now supports float based operation aswell
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14625 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -25,22 +25,35 @@ typedef struct af_extrastereo_s
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float mul;
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}af_extrastereo_t;
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static af_data_t* play_s16(struct af_instance_s* af, af_data_t* data);
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static af_data_t* play_float(struct af_instance_s* af, af_data_t* data);
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// Initialization and runtime control
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static int control(struct af_instance_s* af, int cmd, void* arg)
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{
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af_extrastereo_t* s = (af_extrastereo_t*)af->setup;
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switch(cmd){
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case AF_CONTROL_REINIT:
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case AF_CONTROL_REINIT:{
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// Sanity check
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if(!arg) return AF_ERROR;
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af->data->rate = ((af_data_t*)arg)->rate;
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af->data->nch = 2;
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if (((af_data_t*)arg)->format == AF_FORMAT_FLOAT_NE)
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{
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af->data->format = AF_FORMAT_FLOAT_NE;
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af->data->bps = 4;
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af->play = play_float;
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}// else
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{
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af->data->format = AF_FORMAT_S16_NE;
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af->data->bps = 2;
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af->play = play_s16;
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}
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return af_test_output(af,(af_data_t*)arg);
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}
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case AF_CONTROL_COMMAND_LINE:{
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float f;
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sscanf((char*)arg,"%f", &f);
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@ -67,7 +80,7 @@ static void uninit(struct af_instance_s* af)
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}
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// Filter data through filter
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static af_data_t* play(struct af_instance_s* af, af_data_t* data)
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static af_data_t* play_s16(struct af_instance_s* af, af_data_t* data)
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{
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af_extrastereo_t *s = af->setup;
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register int i = 0;
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@ -89,11 +102,33 @@ static af_data_t* play(struct af_instance_s* af, af_data_t* data)
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return data;
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}
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static af_data_t* play_float(struct af_instance_s* af, af_data_t* data)
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{
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af_extrastereo_t *s = af->setup;
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register int i = 0;
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float *a = (float*)data->audio; // Audio data
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int len = data->len/4; // Number of samples
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float avg, l, r;
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for (i = 0; i < len; i+=2)
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{
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avg = (a[i] + a[i + 1]) / 2;
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l = avg + (s->mul * (a[i] - avg));
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r = avg + (s->mul * (a[i + 1] - avg));
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a[i] = af_softclip(l);
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a[i + 1] = af_softclip(r);
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}
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return data;
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}
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// Allocate memory and set function pointers
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static int open(af_instance_t* af){
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af->control=control;
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af->uninit=uninit;
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af->play=play;
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af->play=play_s16;
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af->mul.n=1;
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af->mul.d=1;
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af->data=calloc(1,sizeof(af_data_t));
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