问题
I want to use espeak in my program. I'd like to know when espeak stops speaking. Are there any flags or functions to check?
Let's consider this is my program:
Line 1
espeak
Line 2
When I execute this code, espeak starts to say "hello, this is espeak" but before it ends, Line 2 of code is executed, and I don't like this. I am looking for a way to pause the program until espeak ends the speaking!
EDIT:
This is my complete code, I use pocketsphinx to recognize what the user say, then save it inside char* hyp and pass it through espeak by speech function.
static ps_decoder_t *ps;
static cmd_ln_t *config;
static FILE *rawfd;
espeak_POSITION_TYPE position_type;
espeak_AUDIO_OUTPUT output;
char *path=NULL;
int Buflength = 1000, Options=0;
void* user_data;
char Voice[] = {"English"};
char text2[30] = {"this is a english test"};
unsigned int Size,position=0, end_position=0, flags=espeakCHARS_AUTO, *unique_identifier;
t_espeak_callback *SynthCallback;
espeak_PARAMETER Parm;
//char* text;
static void initFuncs()
{
output = AUDIO_OUTPUT_PLAYBACK;
espeak_Initialize(output, Buflength, path, Options );
espeak_SetVoiceByName(Voice);
const char *langNativeString = "en";
espeak_VOICE voice;
memset(&voice, 0, sizeof(espeak_VOICE));
voice.languages = langNativeString;
voice.name = "US";
voice.variant = 2;
voice.gender = 1;
espeak_SetVoiceByProperties(&voice);
}
static void sleep_msec(int32 ms)
{
struct timeval tmo;
tmo.tv_sec = 0;
tmo.tv_usec = ms * 1000;
select(0, NULL, NULL, NULL, &tmo);
}
static void speech(char* hyp)
{
Size = strlen(hyp)+1;
espeak_Synth( hyp, Size, position, position_type, end_position, flags,unique_identifier, user_data );
espeak_Synchronize( );
}
static void recognize_from_microphone()
{
ad_rec_t *ad;
int16 adbuf[2048];
uint8 utt_started, in_speech;
int32 k;
char *hyp;
if ((ad = ad_open_dev(cmd_ln_str_r(config, "-adcdev"),(int) cmd_ln_float32_r(config,"-samprate"))) == NULL)
E_FATAL("Failed to open audio device\n");
if (ad_start_rec(ad) < 0)
E_FATAL("Failed to start recording\n");
if (ps_start_utt(ps) < 0)
E_FATAL("Failed to start utterance\n");
utt_started = FALSE;
E_INFO("Ready....\n");
for (;;) {
ad_start_rec(ad);
if ((k = ad_read(ad, adbuf, 2048)) < 0)
E_FATAL("Failed to read audio\n");
ps_process_raw(ps, adbuf, k, FALSE, FALSE);
in_speech = ps_get_in_speech(ps);
if (in_speech && !utt_started) {
utt_started = TRUE;
E_INFO("Listening...\n");
}
if (!in_speech && utt_started) {
ps_end_utt(ps);
hyp = (char*)ps_get_hyp(ps, NULL );
if (hyp != NULL) {
ad_stop_rec(ad);
speech(hyp);
printf("%s\n", hyp);
fflush(stdout);
}
if (ps_start_utt(ps) < 0)
E_FATAL("Failed to start utterance\n");
utt_started = FALSE;
E_INFO("Ready....\n");
}
}//for loop
ad_close(ad);
}
int main(int argc, char *argv[])
{
initFuncs();
config = cmd_ln_init(NULL, ps_args(), TRUE,
"-hmm", MODELDIR "/en-us/en-us",
"-lm", MODELDIR "/en-us/en-us.lm.bin",
"-dict", MODELDIR "/en-us/cmudict-en-us.dict",
NULL);
ps = ps_init(config);
recognize_from_microphone();
ps_free(ps);
cmd_ln_free_r(config);
return 0;
}
回答1:
I adapted the espeak part of your code. In this code espeak is finished before Line 2 begins. Also the callback functionality is implemented. You are setting a voice by name and a voice by property. Maybe this is a problem. You are working with c-style strings and not with std::string. Maybe you are calculating the wrong string length. I don't know where the problem in your code is but the following code has fixed it:
#include <string>
#include <iostream>
#include <espeak/speak_lib.h>
espeak_POSITION_TYPE position_type(POS_CHARACTER);
espeak_AUDIO_OUTPUT output(AUDIO_OUTPUT_PLAYBACK);
void* user_data;
std::string voice("English");
std::string text("this is a english test");
unsigned int Size(0);
unsigned int position(0);
unsigned int end_position(0);
unsigned int flags(espeakCHARS_AUTO);
unsigned int* unique_identifier;
static void initFuncs() {
espeak_Initialize(output, 0, 0, 0);
espeak_SetVoiceByName(voice.c_str());
}
int SynthCallback(short *wav, int numsamples, espeak_EVENT *events) {
std::cout << "Callback: ";
for (unsigned int i(0); events[i].type != espeakEVENT_LIST_TERMINATED; i++) {
if (i != 0) {
std::cout << ", ";
}
switch (events[i].type) {
case espeakEVENT_LIST_TERMINATED:
std::cout << "espeakEVENT_LIST_TERMINATED";
break;
case espeakEVENT_WORD:
std::cout << "espeakEVENT_WORD";
break;
case espeakEVENT_SENTENCE:
std::cout << "espeakEVENT_SENTENCE";
break;
case espeakEVENT_MARK:
std::cout << "espeakEVENT_MARK";
break;
case espeakEVENT_PLAY:
std::cout << "espeakEVENT_PLAY";
break;
case espeakEVENT_END:
std::cout << "espeakEVENT_END";
break;
case espeakEVENT_MSG_TERMINATED:
std::cout << "espeakEVENT_MSG_TERMINATED";
break;
case espeakEVENT_PHONEME:
std::cout << "espeakEVENT_PHONEME";
break;
case espeakEVENT_SAMPLERATE:
std::cout << "espeakEVENT_SAMPLERATE";
break;
default:
break;
}
}
std::cout << std::endl;
return 0;
}
static void speech(std::string hyp) {
Size = hyp.length();
espeak_SetSynthCallback(SynthCallback);
espeak_Synth(hyp.c_str(), Size, position, position_type, end_position, flags,unique_identifier, user_data );
espeak_Synchronize( );
}
int main() {
initFuncs();
std::cout << "Start" << std::endl;
speech(text.c_str());
std::cout << "End" << std::endl;
return 0;
}
The out put is
Start
Callback: espeakEVENT_SENTENCE
Callback: espeakEVENT_WORD
Callback: espeakEVENT_WORD
Callback: espeakEVENT_WORD
Callback: espeakEVENT_WORD
Callback: espeakEVENT_WORD
Callback: espeakEVENT_END
Callback: espeakEVENT_MSG_TERMINATED
End
The timing of the console outout fits to the audio output. When you are working with C++, then you should use its tools and features like strings, cout instead of printf and smart pointers to avoid problems like this.
来源：https://stackoverflow.com/questions/50062009/how-to-find-if-espeak-ended-the-speech