diff options
Diffstat (limited to 'src/common')
| -rw-r--r-- | src/common/src/Audio/tone.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/common/src/Audio/tone.c b/src/common/src/Audio/tone.c index c70a84f..9c2b15a 100644 --- a/src/common/src/Audio/tone.c +++ b/src/common/src/Audio/tone.c @@ -84,7 +84,7 @@ static QueueHandle_t m_squared_queue; // Values are normalised s.t. the mean corresponds to 100 static int32_t normalised_results[NUM_DETECTORS]; -static int tone_1750_detected = 0; +static int num_tone_1750_detected = 0; static int detectors_enabled = 0; static enum dtmf_code dtmf_last_seen = 0; @@ -127,6 +127,7 @@ static inline void push_dtmf_code(enum dtmf_code code) // TODO: Does that depend on TONE_N? const int thresh_dtmf = 200; const int thresh_1750 = 300; +const int num_1750_required = 5; static void analyse_dtmf() { @@ -186,7 +187,7 @@ static void analyse_dtmf() int tone_1750_status() { - return tone_1750_detected; + return num_tone_1750_detected >= num_1750_required; } int tone_fax_status() @@ -316,7 +317,14 @@ void tone_do_analysis() >> 4; // divide by 16 } - tone_1750_detected = (normalised_results[DET_1750] > thresh_1750); + if (num_tone_1750_detected < num_1750_required && + normalised_results[DET_1750] > thresh_1750) { + num_tone_1750_detected++; + } + else if (num_tone_1750_detected > 0) { + num_tone_1750_detected--; + } + analyse_dtmf(); #if PRINT_TONES_STATS |