// this code is based on a52dec/libao/audio_out_oss.cstatic inline int16_t convert (int32_t i){    if (i > 0x43c07fff)	return 32767;    else if (i < 0x43bf8000)	return -32768;    else	return i - 0x43c00000;}static int a52_resample_MONO_to_5_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[5*i] = s16[5*i+1] = s16[5*i+2] = s16[5*i+3] = 0;	    s16[5*i+4] = convert (f[i]);	}    return 5*256;}static int a52_resample_MONO_to_1_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[i] = convert (f[i]);	}    return 1*256;}static int a52_resample_STEREO_to_2_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[2*i] = convert (f[i]);	    s16[2*i+1] = convert (f[i+256]);	}    return 2*256;}static int a52_resample_3F_to_5_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[5*i] = convert (f[i]);	    s16[5*i+1] = convert (f[i+512]);	    s16[5*i+2] = s16[5*i+3] = 0;	    s16[5*i+4] = convert (f[i+256]);	}    return 5*256;}static int a52_resample_2F_2R_to_4_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[4*i] = convert (f[i]);	    s16[4*i+1] = convert (f[i+256]);	    s16[4*i+2] = convert (f[i+512]);	    s16[4*i+3] = convert (f[i+768]);	}    return 4*256;}static int a52_resample_3F_2R_to_5_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[5*i] = convert (f[i]);	    s16[5*i+1] = convert (f[i+512]);	    s16[5*i+2] = convert (f[i+768]);	    s16[5*i+3] = convert (f[i+1024]);	    s16[5*i+4] = convert (f[i+256]);	}    return 5*256;}static int a52_resample_MONO_LFE_to_6_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[6*i] = s16[6*i+1] = s16[6*i+2] = s16[6*i+3] = 0;	    s16[6*i+4] = convert (f[i+256]);	    s16[6*i+5] = convert (f[i]);	}    return 6*256;}static int a52_resample_STEREO_LFE_to_6_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[6*i] = convert (f[i+256]);	    s16[6*i+1] = convert (f[i+512]);	    s16[6*i+2] = s16[6*i+3] = s16[6*i+4] = 0;	    s16[6*i+5] = convert (f[i]);	}    return 6*256;}static int a52_resample_3F_LFE_to_6_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[6*i] = convert (f[i+256]);	    s16[6*i+1] = convert (f[i+768]);	    s16[6*i+2] = s16[6*i+3] = 0;	    s16[6*i+4] = convert (f[i+512]);	    s16[6*i+5] = convert (f[i]);	}    return 6*256;}static int a52_resample_2F_2R_LFE_to_6_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[6*i] = convert (f[i+256]);	    s16[6*i+1] = convert (f[i+512]);	    s16[6*i+2] = convert (f[i+768]);	    s16[6*i+3] = convert (f[i+1024]);	    s16[6*i+4] = 0;	    s16[6*i+5] = convert (f[i]);	}    return 6*256;}static int a52_resample_3F_2R_LFE_to_6_C(float * _f, int16_t * s16){    int i;    int32_t * f = (int32_t *) _f;	for (i = 0; i < 256; i++) {	    s16[6*i] = convert (f[i+256]);	    s16[6*i+1] = convert (f[i+768]);	    s16[6*i+2] = convert (f[i+1024]);	    s16[6*i+3] = convert (f[i+1280]);	    s16[6*i+4] = convert (f[i+512]);	    s16[6*i+5] = convert (f[i]);	}    return 6*256;}static void* a52_resample_C(int flags, int ch){    switch (flags) {    case A52_MONO:	if(ch==5) return a52_resample_MONO_to_5_C;	if(ch==1) return a52_resample_MONO_to_1_C;	break;    case A52_CHANNEL:    case A52_STEREO:    case A52_DOLBY:	if(ch==2) return a52_resample_STEREO_to_2_C;	break;    case A52_3F:	if(ch==5) return a52_resample_3F_to_5_C;	break;    case A52_2F2R:	if(ch==4) return a52_resample_2F_2R_to_4_C;	break;    case A52_3F2R:	if(ch==5) return a52_resample_3F_2R_to_5_C;	break;    case A52_MONO | A52_LFE:	if(ch==6) return a52_resample_MONO_LFE_to_6_C;	break;    case A52_CHANNEL | A52_LFE:    case A52_STEREO | A52_LFE:    case A52_DOLBY | A52_LFE:	if(ch==6) return a52_resample_STEREO_LFE_to_6_C;	break;    case A52_3F | A52_LFE:	if(ch==6) return a52_resample_3F_LFE_to_6_C;	break;    case A52_2F2R | A52_LFE:	if(ch==6) return a52_resample_2F_2R_LFE_to_6_C;	break;    case A52_3F2R | A52_LFE:	if(ch==6) return a52_resample_3F_2R_LFE_to_6_C;	break;    }    return NULL;}