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@ -1,6 +1,6 @@ |
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/*
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* ***** output_i2s_f32.h ***** |
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*
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* |
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* Audio Library for Teensy 3.X |
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* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com |
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* |
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@ -26,7 +26,7 @@ |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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*/ |
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/*
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/*
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* Extended by Chip Audette, OpenAudio, May 2019 |
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* Converted to F32 and to variable audio block length |
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* The F32 conversion is under the MIT License. Use at your own risk. |
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@ -47,14 +47,20 @@ class AudioOutputI2S_F32 : public AudioStream_F32 |
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//GUI: inputs:2, outputs:0 //this line used for automatic generation of GUI node
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public: |
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//uses default AUDIO_SAMPLE_RATE and BLOCK_SIZE_SAMPLES from AudioStream.h:
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AudioOutputI2S_F32(void) : AudioStream_F32(2, inputQueueArray) { begin();}
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AudioOutputI2S_F32(void) : AudioStream_F32(2, inputQueueArray) { begin();} |
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// Allow variable sample rate and block size:
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AudioOutputI2S_F32(const AudioSettings_F32 &settings) : AudioStream_F32(2, inputQueueArray) |
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{
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{ |
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sample_rate_Hz = settings.sample_rate_Hz; |
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audio_block_samples = settings.audio_block_samples; |
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begin();
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begin(); |
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} |
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// outputScale is a gain control for both left and right. If set exactly
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// to 1.0f it is left as a pass-through.
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void setGain(float _oscale) { |
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outputScale = _oscale; |
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} |
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virtual void update(void); |
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void begin(void); |
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void begin(bool); |
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@ -75,7 +81,7 @@ public: |
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static void scale_f32_to_i16( float32_t *p_f32, float32_t *p_i16, int len) ; |
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static void scale_f32_to_i24( float32_t *p_f32, float32_t *p_i16, int len) ; |
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static void scale_f32_to_i32( float32_t *p_f32, float32_t *p_i32, int len) ; |
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static float setI2SFreq_T3(const float); // I2S clock for T3,x
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protected: |
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AudioOutputI2S_F32(int dummy): AudioStream_F32(2, inputQueueArray) {} // to be used only inside AudioOutputI2Sslave !!
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@ -101,6 +107,7 @@ private: |
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static float sample_rate_Hz; |
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static int audio_block_samples; |
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volatile uint8_t enabled = 1; |
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float outputScale = 1.0f; // Quick volume control
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}; |
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class AudioOutputI2Sslave_F32 : public AudioOutputI2S_F32 |
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