本示例涉及到单个MSP对象同时使用Signal类型、Message类型的入口;代理入口的使用。
注意:MSP对象的入口默认为代理入口,因此Signal类型、Message类型的数据都可接收;
#include "ext.h"
#include "ext_obex.h"
#include "z_dsp.h" typedef struct _butterFilterTest {t_pxobject ob; // the object itself (t_pxobject in MSP instead of t_object)long iirOrder; // 滤波器阶数 nt_atom* iirState; // 存储滤波器状态 nint fltStateParaNum; // 滤波器状态参数个数 nt_atom* a; // 滤波器参数a (n+1)t_atom* b; // 滤波器参数bint fltParaNum; // 滤波器参数个数 (n+1)int sampleframes; // 帧大小long lastVectorSize; // 用以判定signal vector size是否有变//void* outLet;/*** 用以测试 ***/t_atom* sigList; // 存储滤波后的单帧信号t_atom* tmpList; // 暂存到来的单帧信号/***************/
} t_butterFilterTest;void* butterFilterTest_new(t_symbol* s, long argc, t_atom* argv);
void butterFilterTest_free(t_butterFilterTest* x);
void butterFilterTest_assist(t_butterFilterTest* x, void* b, long m, long a, char* s);
void butterFilterTest_dsp64(t_butterFilterTest* x, t_object* dsp64, short* count, double samplerate, long maxvectorsize, long flags);
void butterFilterTest_perform64(t_butterFilterTest* x, t_object* dsp64, double** ins, long numins, double** outs, long numouts, long sampleframes, long flags, void* userparam);
void butterFilterTest_perform64_list(t_butterFilterTest* x, t_object* dsp64, double** ins, long numins, double** outs, long numouts, long sampleframes, long flags, void* userparam);
void butterFilterTest_feed(t_butterFilterTest* x, t_double* inSig, int sampleframes);void butterFilterTest_recvList(t_butterFilterTest* x, t_symbol* s, long argc, t_atom* argv);
void butterFilterTest_feed_test(t_butterFilterTest* x, long sampleframes);static t_class* butterFilterTest_class = NULL;void ext_main(void* r) {t_class* c = class_new("butterFilterTest~", (method)butterFilterTest_new, (method)butterFilterTest_free, (long)sizeof(t_butterFilterTest), 0L, A_GIMME, 0);class_addmethod(c, (method)butterFilterTest_dsp64, "dsp64", A_CANT, 0);class_addmethod(c, (method)butterFilterTest_assist, "assist", A_CANT, 0);class_addmethod(c, (method)butterFilterTest_recvList, "list", A_GIMME, 0);class_dspinit(c); // 初始化 & 加入通用处理方法class_register(CLASS_BOX, c);butterFilterTest_class = c;
}void* butterFilterTest_new(t_symbol* s, long argc, t_atom* argv) {t_butterFilterTest* x = (t_butterFilterTest*)object_alloc(butterFilterTest_class);dsp_setup((t_pxobject*)x, 3); // MSP inlets: arg is # of inlets and is REQUIRED! 信号入口数为1,3则信号入口数为3// use 0 if you don't need inletsoutlet_new(x, "signal"); // signal outlet (note "signal" rather than NULL) 信号出口//x->outLet = listout(x);x->a = NULL;x->b = NULL;x->fltParaNum = 0;x->iirState = NULL;x->fltStateParaNum = 0;x->sigList = NULL;x->tmpList = NULL;x->lastVectorSize = 0;return (x);
}void butterFilterTest_free(t_butterFilterTest* x) {dsp_free((t_pxobject*)x);sysmem_freeptr(x->a);sysmem_freeptr(x->b);sysmem_freeptr(x->iirState);sysmem_freeptr(x->sigList);sysmem_freeptr(x->tmpList);
}void butterFilterTest_assist(t_butterFilterTest* x, void* b, long m, long a, char* s) {if (m == ASSIST_INLET) { //inletsprintf(s, "I am inlet %ld", a);} else { // outletsprintf(s, "I am outlet %ld", a);}
}void butterFilterTest_recvList(t_butterFilterTest* x, t_symbol* s, long argc, t_atom* argv) {long inNum = proxy_getinlet((t_object*)x);post("inNum: %d. list recv.", inNum);x->iirOrder = argc - 1; // 滤波器阶数x->fltStateParaNum = argc - 1; // 滤波器状态参数个数if (x->a == NULL || x->fltParaNum != argc) {if (x->a != NULL) {sysmem_freeptr(x->a);sysmem_freeptr(x->iirState);}x->a = (t_atom*)sysmem_newptr(sizeof(t_atom) * argc);x->iirState = (t_atom*)sysmem_newptr(sizeof(t_atom) * x->fltStateParaNum);if (x->a == NULL || x->iirState == NULL) {return;}}if (x->b == NULL || x->fltParaNum != argc) {if (x->b != NULL) {sysmem_freeptr(x->b);}x->b = (t_atom*)sysmem_newptr(sizeof(t_atom) * argc);if (x->b == NULL) {return;}}x->fltParaNum = argc; // 更新滤波器参数个数switch (inNum) {case 0:post("List size: %d", argc);for (int i = 0; i < argc; i++) {atom_setfloat(&(x->tmpList[i]), atom_getfloat(&(argv[i])));}break;case 1:post("List size: %d", argc);for (int i = 0; i < argc; i++) {atom_setfloat(&(x->a[i]), atom_getfloat(&(argv[i])));}post("AAAA");for (int i = 0; i < argc; i++) {post("%lf", atom_getfloat(&(x->a[i])));}break;case 2:post("List size: %d", argc);for (int i = 0; i < argc; i++) {atom_setfloat(&(x->b[i]), atom_getfloat(&(argv[i])));}post("AAAA");for (int i = 0; i < argc; i++) {post("%lf", atom_getfloat(&(x->a[i])));}post("BBB");for (int i = 0; i < argc; i++) {post("%lf", atom_getfloat(&(x->b[i])));}post("recv iirState:");for (int i = 0; i < x->fltStateParaNum; i++) {post("%lf", atom_getfloat(&(x->iirState[i])));}break;}
}// registers a function for the signal chain in Max
void butterFilterTest_dsp64(t_butterFilterTest* x, t_object* dsp64, short* count, double samplerate, long maxvectorsize, long flags) {post("my sample rate is: %f,vector size is: %ld", samplerate, maxvectorsize); // 和Audio status中设置相同x->sampleframes = maxvectorsize;/* 滤波器状态初始化*/for (int i = 0; i < x->fltStateParaNum; i++) {atom_setfloat(&(x->iirState[i]), 0);}post("dsp64 iirstate:");for (int i = 0; i < x->fltStateParaNum; i++) {post("%lf", atom_getfloat(&(x->iirState[i])));}if (x->sigList == NULL || x->lastVectorSize != maxvectorsize) {if (x->sigList != NULL) {sysmem_freeptr(x->sigList);}x->sigList = (t_atom*)sysmem_newptr(sizeof(t_atom) * maxvectorsize);if (x->sigList == NULL) {return;}}if (x->tmpList == NULL || x->lastVectorSize != maxvectorsize) {if (x->tmpList != NULL) {sysmem_freeptr(x->tmpList);}x->tmpList = (t_atom*)sysmem_newptr(sizeof(t_atom) * maxvectorsize);if (x->tmpList == NULL) {return;}}x->lastVectorSize = maxvectorsize;post("%d", count[0]);post("%d", count[1]);if (count[0]) {post("Signal come.");object_method(dsp64, gensym("dsp_add64"), x, butterFilterTest_perform64, 0, NULL);} else {//post("List come.");//object_method(dsp64, gensym("dsp_add64"), x, butterFilterTest_perform64_list, 0, NULL);}if (count[1]) {}if (count[2]) {}
}/*******************************************************逐帧验证**********************************************************/
void butterFilterTest_perform64_list(t_butterFilterTest* x, t_object* dsp64, double** ins, long numins, double** outs, long numouts,long sampleframes, long flags, void* userparam) {butterFilterTest_feed_test(x, sampleframes);//outlet_anything(x->outLet, gensym("list"), x->sampleframes, x->sigList);//post("%lf, %lf", x->iirState[0], x->iirState[1]);
}void butterFilterTest_feed_test(t_butterFilterTest* x, long sampleframes) {//post("%lf, %lf", x->iirState[0], x->iirState[1]);for (int k = 0; k < x->fltParaNum; k++) { //归一化atom_setfloat(&(x->b[k]), atom_getfloat(&(x->b[k])) / atom_getfloat(&(x->a[0])));atom_setfloat(&(x->a[k]), atom_getfloat(&(x->a[k])) / atom_getfloat(&(x->a[0])));}//Sleep(2000);for (int i = 0; i < sampleframes; i++) {atom_setfloat(&(x->sigList[i]), (atom_getfloat(&(x->b[0])) * atom_getfloat(&(x->tmpList[i])) + atom_getfloat(&(x->iirState[0]))));//post("sampleframs:%d, x->sigList[%d]: %lf, x->tmpList[%d]: %lf, x->iirState[0]: %lf", sampleframes, i, atom_getfloat(&(x->sigList[i])), i, atom_getfloat(&(x->tmpList[i])), x->iirState[0]);for (int j = 1; j < x->fltParaNum - 1; j++) { // j = 1atom_setfloat(&(x->iirState[j - 1]), (atom_getfloat(&(x->iirState[j])) + atom_getfloat(&(x->b[j])) * atom_getfloat(&(x->tmpList[i])) - atom_getfloat(&(x->a[j])) * atom_getfloat(&(x->sigList[i]))));//x->iirState[j - 1] = x->iirState[j] + x->b[j] * atom_getfloat(&(x->tmpList[i])) - x->a[j] * atom_getfloat(&(x->sigList[i]));}atom_setfloat(&(x->iirState[x->fltParaNum - 2]), (atom_getfloat(&(x->b[x->fltParaNum - 1])) * atom_getfloat(&(x->tmpList[i])) - atom_getfloat(&(x->a[x->fltParaNum - 1])) * atom_getfloat(&(x->sigList[i]))));//x->iirState[x->fltParaNum - 2] = x->b[x->fltParaNum - 1] * atom_getfloat(&(x->tmpList[i])) - x->a[x->fltParaNum - 1] * atom_getfloat(&(x->sigList[i]));}
}
/*************************************************************************************************************************/void butterFilterTest_perform64(t_butterFilterTest* x, t_object* dsp64, double** ins, long numins, double** outs, long numouts,long sampleframes, long flags, void* userparam) { // this is the 64-bit perform method audio vectorst_double* inL = ins[0]; // we get audio for each inlet of the object from the **ins argumentt_double* outL = outs[0]; // we get audio for each outlet of the object from the **outs argumentint n = sampleframes; // vector sizebutterFilterTest_feed(x, inL, sampleframes);post("perform64 iirstate:");for (int i = 0; i < x->fltStateParaNum; i++) {post("%lf", atom_getfloat(&(x->iirState[i])));}while (n--) {*outL++ = *inL++;}
}void butterFilterTest_feed(t_butterFilterTest* x, t_double* inSig, int sampleframes) {for (int k = 0; k < x->fltParaNum; k++) { // 归一化atom_setfloat(&(x->b[k]), atom_getfloat(&(x->b[k])) / atom_getfloat(&(x->a[0])));atom_setfloat(&(x->a[k]), atom_getfloat(&(x->a[k])) / atom_getfloat(&(x->a[0])));}for (int i = 0; i < sampleframes; i++) {t_double tmp = inSig[i];inSig[i] = atom_getfloat(&(x->b[0])) * tmp + atom_getfloat(&(x->iirState[0]));for (int j = 1; j < x->fltParaNum - 1; j++) {atom_setfloat(&(x->iirState[j - 1]), atom_getfloat(&(x->iirState[j])) + atom_getfloat(&(x->b[j])) * tmp - atom_getfloat(&(x->a[j])) * inSig[i]);//x->iirState[j - 1] = atom_getfloat(&(x->iirState[j])) + atom_getfloat(&(x->b[j])) * tmp - atom_getfloat(&(x->a[j])) * inSig[i];}atom_setfloat(&(x->iirState[x->fltParaNum - 2]), atom_getfloat(&(x->b[x->fltParaNum - 1])) * tmp - atom_getfloat(&(x->a[x->fltParaNum - 1])) * inSig[i]);//x->iirState[x->fltParaNum - 2] = x->b[x->fltParaNum - 1] * tmp - x->a[x->fltParaNum - 1] * inSig[i];}
}