sekai/bin/espeak-sg.cpp

#include <espeak-ng/espeak_ng.h>
#define PLAYBACK_MODE (ENOUTPUT_MODE_SYNCHRONOUS | ENOUTPUT_MODE_SPEAK_AUDIO)

#include <vector>
#include <string>
#include <sndfile.h>
#include <math.h>
#include <string.h>

#include <boost/lexical_cast.hpp>

struct segment
{
    char type;
    int start;
    int length;
};

struct pho_event
{
    std::string code;
    int type;
    int start;
};


struct output_data
{
// for each run
	std::vector<short int> samples;
	std::vector<segment> segments;
	std::vector<pho_event> pho;
	char segment_type = 0;
	int segment_pos = 0;
	float length;
};

struct output_data* current;

std::vector<output_data*> runs;

void init()
{
	espeak_ng_InitializePath(NULL);
	
	espeak_ng_ERROR_CONTEXT context = NULL;
	espeak_ng_Initialize(&context);
	
	espeak_ng_InitializeOutput(ENOUTPUT_MODE_SYNCHRONOUS, 0, NULL); //FIX https://notabug.org/isengaara/sekai/issues/4
}

void segment_event(char type)
{
    if(current->segment_type!=type)
    {
        if(current->segment_type!=0)
        {
            segment s;
            s.type = current->segment_type;
            s.start = current->segment_pos;
            s.length = current->samples.size()-current->segment_pos;
            current->segments.push_back(s);
        }
        current->segment_type = type;
        current->segment_pos = current->samples.size();
    }
}

void outputPhoSymbol(char* pho_code,int pho_type)
{
    pho_event p;
    p.code = pho_code;
    p.type = pho_type;
    p.start = current->samples.size();
    current->pho.push_back(p);
	
}

void outputSilence(short int sample)
{
    segment_event('S');
    current->samples.push_back(sample);
}

void outputUnvoiced(short int sample)
{
   segment_event('U');
   current->samples.push_back(sample);   
}

void outputVoiced(short int sample)
{
    segment_event('V');
    current->samples.push_back(sample);
}

void flush()
{
    outputPhoSymbol((char*)"#",0);
    segment_event(0);
}

void write_zstring(FILE* f,std::string s)
{
    fwrite(s.c_str(),1,s.length()+1,f);
}

void write_int(FILE* f,int n)
{
    fwrite(&n,1,sizeof(int),f);
}

void write_short(FILE* f,short n)
{
    fwrite(&n,1,sizeof(short),f);
}

void write_char(FILE* f,char n)
{
    fwrite(&n,1,sizeof(char),f);
}

void write_float(FILE* f,float n)
{
    fwrite(&n,1,sizeof(float),f);
}


void do_synth(int rate,int f0,char* lyric)
{
	// synth with param
	espeak_SetParameter(espeakRATE, rate, 0);
    
    //synth
    espeak_ng_SetConstF0(f0);
	espeak_ng_Synthesize(lyric, 0, 0, POS_CHARACTER, 0, 0, NULL, NULL);
    flush();
}

void show_length(float fs)
{
	float count = current->samples.size();
	float length = count/fs;
	current->length = length;
}

void find_best_one(float note_length)
{
	bool found = false;
	
	for(size_t i=0; i<runs.size()-1; i++)
	{
		float delta0 = fabs(runs[i]->length - note_length);
		float delta1 = fabs(runs[i+1]->length - note_length);
		//printf("find best one %i %f %f",(int)i,delta0,delta1);
		if(!found && delta1 > delta0)
		{
			//printf(" found");
			current = runs[i];
			found = true;
		}
		//printf("\n");
	}
}
    

int main(int argc,char** argv)
{
    if(argc<6) 
    {
        printf("usage: espeak-sg voice f0 lyric rate filename [optargs..]\n");
        return 0;
    }
    
    char* voice    =      argv[1];
    int f0         = atoi(argv[2]);
    char* lyric    =      argv[3];
    int rate       = atoi(argv[4]);
    char* filename =      argv[5];
    
    bool have_note_length = false;
    float note_length = 0;
    
    for(int i=6;i<argc;i++)
    {
		char* optarg = argv[i];
		if(strlen(optarg)>4)
		{
			if(optarg[0]=='n' && optarg[1]=='l' && optarg[2]=='=')
			{
				note_length = boost::lexical_cast<float>(optarg+3);
				have_note_length = true;
			}
		}
	}
	
	
	
	
	init();
	espeak_ng_SetVoiceByName(voice);
	
	
	
	espeak_ng_OUTPUT_HOOKS hooks;
	hooks.outputPhoSymbol = outputPhoSymbol;
	hooks.outputSilence = outputSilence;
	hooks.outputUnvoiced = outputUnvoiced;
	hooks.outputVoiced = outputVoiced;
	espeak_ng_SetOutputHooks(&hooks);
	
	float samplerate = (float)espeak_ng_GetSampleRate();
	
	if(rate!=0)
	{
		current = new output_data;
		do_synth(rate,f0,lyric);
	}
	else
	{
		if(!have_note_length)
		{
			fprintf(stderr,"note length required\n");
			return 1;
		}
		#if 0
		SF_INFO info;
		info.samplerate = espeak_ng_GetSampleRate();
		info.channels = 1;
		info.format = SF_FORMAT_WAV | SF_FORMAT_PCM_16;
		info.sections = 0;
		info.frames = 0;
		info.seekable = 0;
		SNDFILE* sf = sf_open("/tmp/debug.wav",SFM_WRITE,&info);
		#endif
		
		for(int current_rate = 80; current_rate < 450; current_rate += 5)
		{
			//printf("set rate %i\n",current_rate);
			current = new output_data;
			do_synth(current_rate,f0,lyric);
			show_length(samplerate);
			runs.push_back(current);
		}
		
		find_best_one(note_length);
		
		#if 0
		sf_write_short(sf,current->samples.data(),current->samples.size());
		sf_close(sf);
		#endif
	}
	
    FILE* f = fopen(filename,"w");
    write_zstring(f,"espeak-sg");
    write_int(f,0); //version of the file format
    write_int(f,samplerate);
    write_int(f,f0);
    
    
    write_int(f,current->pho.size());
    for (auto i : current->pho)
    {
        write_zstring(f,i.code);
        write_int(f,i.type);
        write_int(f,i.start);
    }
    
    write_int(f,current->segments.size());
    for (auto i : current->segments)
    {
        write_char(f, i.type);
        write_int(f, i.start);
        write_int(f,  i.length);
    }
    
    write_int(f,current->samples.size());
    fwrite(current->samples.data(),current->samples.size(),sizeof(short),f);
    
    fclose(f); 
    
    return 0;   
}