public static trigger_adapter trigger_create(string modelDir, string dictionaryFile, bool verboseLogging)
{
//printf(" creating recognizer\n");
Pointer <ps_decoder_t> ps = PointerHelpers.NULL <ps_decoder_t>();
Pointer <cmd_ln_t> config = PointerHelpers.NULL <cmd_ln_t>();
config = cmd_ln.cmd_ln_init(config, pocketsphinx.ps_args(), 1,
"-hmm", modelDir,
"-dict", dictionaryFile,
"-verbose", "y");
ps = pocketsphinx.ps_init(config);
cmd_ln.cmd_ln_free_r(config);
trigger_adapter adapter = new trigger_adapter();
adapter.ps = ps;
adapter.user_is_speaking = false;
adapter.last_hyp = PointerHelpers.Malloc <byte>(512);
adapter.last_hyp[0] = 0;
return(adapter);
}
public static int trigger_start_processing(trigger_adapter adapter)
{
//printf(" process start\n");
Pointer <ps_decoder_t> ps = adapter.ps;
adapter.utt_started = true;
return(pocketsphinx.ps_start_utt(ps)); // todo use ps_start_stream?
}
public static int trigger_stop_processing(trigger_adapter adapter)
{
//printf(" process stop\n");
Pointer <ps_decoder_t> ps = adapter.ps;
if (adapter.utt_started)
{
pocketsphinx.ps_end_utt(ps);
adapter.utt_started = false;
if (adapter.last_hyp.IsNonNull)
{
adapter.last_hyp[0] = (byte)'\0';
}
}
return(0);
}
public static int trigger_reconfigure(trigger_adapter adapter, Pointer <byte> keyfile)
{
Pointer <ps_decoder_t> ps = adapter.ps;
//printf(" reconfiguring %s\n", keyfile);
if (pocketsphinx.ps_set_kws(ps, cstring.ToCString("keyword_search"), keyfile) != 0)
{
return(-1);
}
if (pocketsphinx.ps_set_search(ps, cstring.ToCString("keyword_search")) != 0)
{
return(-1);
}
return(0);
}
public static void Main(string[] args)
{
string rootDir = "C:\\Code\\Durandal";
string modelDir = rootDir + "\\Data\\sphinx\\en-us-semi";
string dictFile = rootDir + "\\Data\\sphinx\\cmudict_SPHINX_40.txt";
trigger_adapter trigger = psphinx_trigger.trigger_create(modelDir, dictFile, true);
Pointer <byte> configuration1 = cstring.ToCString("ACTIVATE/3.16227766016838e-13/\nEXECUTE COURSE/3.16227766016838e-13/\n");
psphinx_trigger.trigger_reconfigure(trigger, configuration1);
// Read input file 1
byte[] file_bytes = System.IO.File.ReadAllBytes(rootDir + "\\Extensions\\Pocketsphinx\\Test1.raw");
int samples = file_bytes.Length / 2;
short[] file = new short[samples];
Pointer <short> input_file_ptr = new Pointer <short>(new UpcastingMemoryBlockAccess <short>(new MemoryBlock <byte>(file_bytes)), 0);
input_file_ptr.MemCopyTo(file, 0, samples);
input_file_ptr = new Pointer <short>(file);
// Send it to the trigger in chunks
Pointer <byte> hyp = PointerHelpers.Malloc <byte>(512);
Pointer <byte> lasthyp = PointerHelpers.Malloc <byte>(512);
psphinx_trigger.trigger_start_processing(trigger);
for (int cursor = 0; cursor < (samples - 159); cursor += 160)
{
psphinx_trigger.trigger_process_samples(trigger, input_file_ptr + cursor, 160);
psphinx_trigger.trigger_get_last_hyp(trigger, hyp);
if (cstring.strlen(hyp) != 0 && cstring.strcmp(hyp, lasthyp) != 0)
{
Console.Write("Got trigger {0} at sample number {1}\n", cstring.FromCString(hyp), cursor);
cstring.strncpy(lasthyp, hyp, 512);
}
}
psphinx_trigger.trigger_stop_processing(trigger);
Console.Write("\n\nON TO TEST #2\n\n\n");
Pointer <byte> configuration2 = cstring.ToCString("COMPUTER/3.16227766016838e-13/\n");
psphinx_trigger.trigger_reconfigure(trigger, configuration2);
// Read input file 2
file_bytes = System.IO.File.ReadAllBytes(rootDir + "\\Extensions\\Pocketsphinx\\Test2.raw");
samples = file_bytes.Length / 2;
file = new short[samples];
input_file_ptr = new Pointer <short>(new UpcastingMemoryBlockAccess <short>(new MemoryBlock <byte>(file_bytes)), 0);
input_file_ptr.MemCopyTo(file, 0, samples);
input_file_ptr = new Pointer <short>(file);
// Send it to the trigger in chunks
hyp = PointerHelpers.Malloc <byte>(512);
lasthyp = PointerHelpers.Malloc <byte>(512);
psphinx_trigger.trigger_start_processing(trigger);
for (int cursor = 0; cursor < (samples - 159); cursor += 160)
{
psphinx_trigger.trigger_process_samples(trigger, input_file_ptr + cursor, 160);
psphinx_trigger.trigger_get_last_hyp(trigger, hyp);
if (cstring.strlen(hyp) != 0 && cstring.strcmp(hyp, lasthyp) != 0)
{
Console.Write("Got trigger {0} at sample number {1}\n", cstring.FromCString(hyp), cursor);
cstring.strncpy(lasthyp, hyp, 512);
}
}
psphinx_trigger.trigger_stop_processing(trigger);
psphinx_trigger.trigger_free(trigger);
}
public static bool trigger_process_samples(trigger_adapter adapter, Pointer <short> samples, int numSamples)
{
Pointer <ps_decoder_t> ps = adapter.ps;
pocketsphinx.ps_process_raw(ps, samples, (uint)numSamples, 0, 0);
byte in_speech = pocketsphinx.ps_get_in_speech(ps);
if (in_speech != 0 && !adapter.user_is_speaking)
{
adapter.user_is_speaking = true;
}
bool returnVal = false;
BoxedValueInt score = new BoxedValueInt();
Pointer <byte> hyp = pocketsphinx.ps_get_hyp(ps, score);
if (hyp.IsNonNull)
{
//printf(" tenative hyp %s\n", hyp);
if (!adapter.triggered)
{
returnVal = true;
adapter.triggered = true;
uint hypsize = cstring.strlen(hyp);
cstring.strncpy(adapter.last_hyp, hyp, hypsize);
adapter.last_hyp[hypsize] = 0;
//printf(" adapter last hyp is %s\n", hyp);
}
}
if (in_speech == 0 && adapter.user_is_speaking)
{
/* speech .Deref. silence transition, time to start new utterance */
pocketsphinx.ps_end_utt(ps);
adapter.utt_started = false;
hyp = pocketsphinx.ps_get_hyp(ps, score);
if (hyp.IsNonNull)
{
//printf(" final hyp %s\n", hyp);
if (!adapter.triggered)
{
returnVal = true;
adapter.triggered = true;
uint hypsize = cstring.strlen(hyp);
cstring.strncpy(adapter.last_hyp, hyp, hypsize);
adapter.last_hyp[hypsize] = 0;
//printf(" adapter last hyp is %s\n", hyp);
}
}
if (pocketsphinx.ps_start_utt(ps) < 0)
{
//printf(" failed to restart utterance\n");
}
adapter.utt_started = true;
adapter.user_is_speaking = false;
adapter.triggered = false;
//printf("Ready....\n");
}
return(returnVal);
}
public static int trigger_free(trigger_adapter adapter)
{
pocketsphinx.ps_free(adapter.ps);
return(0);
}
public static void trigger_get_last_hyp(trigger_adapter adapter, Pointer <byte> buffer)
{
cstring.strncpy(buffer, adapter.last_hyp, 512);
}
