static teletone_detection_descriptor_t dtmf_detect_row_2nd[GRID_FACTOR];
static teletone_detection_descriptor_t dtmf_detect_col_2nd[GRID_FACTOR];
-static float dtmf_row[] = {697.0, 770.0, 852.0, 941.0};
-static float dtmf_col[] = {1209.0, 1336.0, 1477.0, 1633.0};
+static teletone_process_t dtmf_row[] = {697.0, 770.0, 852.0, 941.0};
+static teletone_process_t dtmf_col[] = {1209.0, 1336.0, 1477.0, 1633.0};
static char dtmf_positions[] = "123A" "456B" "789C" "*0#D";
int samples)
{
int i;
- float v1;
+ teletone_process_t v1;
for (i = 0; i < samples; i++) {
v1 = goertzel_state->v2;
}
}
-float teletone_goertzel_result (teletone_goertzel_state_t *goertzel_state)
+teletone_process_t teletone_goertzel_result (teletone_goertzel_state_t *goertzel_state)
{
return goertzel_state->v3 * goertzel_state->v3 + goertzel_state->v2 * goertzel_state->v2 - goertzel_state->v2 * goertzel_state->v3 * goertzel_state->fac;
}
void teletone_dtmf_detect_init (teletone_dtmf_detect_state_t *dtmf_detect_state, int sample_rate)
{
int i;
- float theta;
+ teletone_process_t theta;
dtmf_detect_state->hit1 = dtmf_detect_state->hit2 = 0;
for (i = 0; i < GRID_FACTOR; i++) {
- theta = M_TWO_PI*(dtmf_row[i]/(float)sample_rate);
+ theta = M_TWO_PI*(dtmf_row[i]/(teletone_process_t)sample_rate);
dtmf_detect_row[i].fac = 2.0*cos(theta);
- theta = M_TWO_PI*(dtmf_col[i]/(float)sample_rate);
+ theta = M_TWO_PI*(dtmf_col[i]/(teletone_process_t)sample_rate);
dtmf_detect_col[i].fac = 2.0*cos(theta);
- theta = M_TWO_PI*(dtmf_row[i]*2.0/(float)sample_rate);
+ theta = M_TWO_PI*(dtmf_row[i]*2.0/(teletone_process_t)sample_rate);
dtmf_detect_row_2nd[i].fac = 2.0*cos(theta);
- theta = M_TWO_PI*(dtmf_col[i]*2.0/(float)sample_rate);
+ theta = M_TWO_PI*(dtmf_col[i]*2.0/(teletone_process_t)sample_rate);
dtmf_detect_col_2nd[i].fac = 2.0*cos(theta);
goertzel_init (&dtmf_detect_state->row_out[i], &dtmf_detect_row[i]);
void teletone_multi_tone_init(teletone_multi_tone_t *mt, teletone_tone_map_t *map)
{
- float theta = 0;
+ teletone_process_t theta = 0;
int x = 0;
if(!mt->min_samples) {
break;
}
mt->tone_count++;
- theta = M_TWO_PI*(map->freqs[x]/(float)mt->sample_rate);
+ theta = M_TWO_PI*(map->freqs[x]/(teletone_process_t)mt->sample_rate);
mt->tdd[x].fac = 2.0 * cos(theta);
goertzel_init (&mt->gs[x], &mt->tdd[x]);
goertzel_init (&mt->gs2[x], &mt->tdd[x]);
int samples)
{
int sample, limit, j, x = 0;
- float v1, famp;
- float eng_sum = 0, eng_all[TELETONE_MAX_TONES];
+ teletone_process_t v1, famp;
+ teletone_process_t eng_sum = 0, eng_all[TELETONE_MAX_TONES];
int gtest = 0, see_hit = 0;
for (sample = 0; sample < samples; sample = limit) {
int16_t sample_buffer[],
int samples)
{
- float row_energy[GRID_FACTOR];
- float col_energy[GRID_FACTOR];
- float famp;
- float v1;
+ teletone_process_t row_energy[GRID_FACTOR];
+ teletone_process_t col_energy[GRID_FACTOR];
+ teletone_process_t famp;
+ teletone_process_t v1;
int i;
int j;
int sample;
/*! \brief A continer for the elements of a Goertzel Algorithm (The names are from his formula) */
typedef struct {
- float v2;
- float v3;
- float fac;
+ teletone_process_t v2;
+ teletone_process_t v3;
+ teletone_process_t fac;
} teletone_goertzel_state_t;
/*! \brief A container for a DTMF detection state.*/
teletone_goertzel_state_t col_out[GRID_FACTOR];
teletone_goertzel_state_t row_out2nd[GRID_FACTOR];
teletone_goertzel_state_t col_out2nd[GRID_FACTOR];
- float energy;
+ teletone_process_t energy;
int current_sample;
char digits[TELETONE_MAX_DTMF_DIGITS + 1];
/*! \brief An abstraction to store the coefficient of a tone frequency */
typedef struct {
- float fac;
+ teletone_process_t fac;
} teletone_detection_descriptor_t;
/*! \brief A container for a single multi-tone detection
teletone_goertzel_state_t gs2[TELETONE_MAX_TONES];
int tone_count;
- float energy;
+ teletone_process_t energy;
int current_sample;
int min_samples;
/*!
\brief Initilize a DTMF detection state object
+ \param dtmf_detect_state the DTMF detection state to initilize
\param sample_rate the desired sample rate
*/
void teletone_dtmf_detect_init (teletone_dtmf_detect_state_t *dtmf_detect_state, int sample_rate);
\param goertzel_state the goertzel state to retrieve from
\return the computed value for consideration in furthur audio tests
*/
-float teletone_goertzel_result (teletone_goertzel_state_t *goertzel_state);
+teletone_process_t teletone_goertzel_result (teletone_goertzel_state_t *goertzel_state);
*/
typedef short teletone_audio_t;
-typedef float teletone_process_t;
struct teletone_generation_session;
typedef int (*tone_handler)(struct teletone_generation_session *ts, teletone_tone_map_t *map);
\param ts the tone generation session to initilize
\param buflen the size of the buffer(in samples) to dynamically allocate
\param handler a callback function to execute when a tone generation instruction is complete
+ \param user_data optional user data to send
\return 0
*/
int teletone_init_session(teletone_generation_session_t *ts, int buflen, tone_handler handler, void *user_data);