You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
3.8 KiB
107 lines
3.8 KiB
/*
|
|
* AudioStream_F32
|
|
*
|
|
* Created: Chip Audette, November 2016
|
|
* Purpose; Extend the Teensy Audio Library's "AudioStream" to permit floating-point audio data.
|
|
*
|
|
* I modeled it directly on the Teensy code in "AudioStream.h" and "AudioStream.cpp", which are
|
|
* available here: https://github.com/PaulStoffregen/cores/tree/master/teensy3
|
|
*
|
|
* MIT License. use at your own risk.
|
|
*/
|
|
|
|
#ifndef _OpenAudio_ArduinoLibrary
|
|
#define _OpenAudio_ArduinoLibrary
|
|
|
|
#include <arm_math.h> //ARM DSP extensions. for speed!
|
|
#include <Audio.h> //Teensy Audio Library
|
|
|
|
class AudioStream_F32;
|
|
class AudioConnection_F32;
|
|
|
|
//create a new structure to hold audio as floating point values.
|
|
//modeled on the existing teensy audio block struct, which uses Int16
|
|
//https://github.com/PaulStoffregen/cores/blob/268848cdb0121f26b7ef6b82b4fb54abbe465427/teensy3/AudioStream.h
|
|
typedef struct audio_block_f32_struct {
|
|
unsigned char ref_count;
|
|
unsigned char memory_pool_index;
|
|
unsigned char reserved1;
|
|
unsigned char reserved2;
|
|
#if AUDIO_BLOCK_SAMPLES < 128
|
|
float32_t data[128]; //limit array size to be no smaller than 128. unstable otherwise?
|
|
#else
|
|
float32_t data[AUDIO_BLOCK_SAMPLES]; // AUDIO_BLOCK_SAMPLES is 128, from AudioStream.h
|
|
#endif
|
|
const int length = AUDIO_BLOCK_SAMPLES; // AUDIO_BLOCK_SAMPLES is 128, from AudioStream.h
|
|
const float fs_Hz = AUDIO_SAMPLE_RATE; // AUDIO_SAMPLE_RATE is 44117.64706 from AudioStream.h
|
|
} audio_block_f32_t;
|
|
|
|
class AudioConnection_F32
|
|
{
|
|
public:
|
|
AudioConnection_F32(AudioStream_F32 &source, AudioStream_F32 &destination) :
|
|
src(source), dst(destination), src_index(0), dest_index(0),
|
|
next_dest(NULL)
|
|
{ connect(); }
|
|
AudioConnection_F32(AudioStream_F32 &source, unsigned char sourceOutput,
|
|
AudioStream_F32 &destination, unsigned char destinationInput) :
|
|
src(source), dst(destination),
|
|
src_index(sourceOutput), dest_index(destinationInput),
|
|
next_dest(NULL)
|
|
{ connect(); }
|
|
friend class AudioStream_F32;
|
|
protected:
|
|
void connect(void);
|
|
AudioStream_F32 &src;
|
|
AudioStream_F32 &dst;
|
|
unsigned char src_index;
|
|
unsigned char dest_index;
|
|
AudioConnection_F32 *next_dest;
|
|
};
|
|
|
|
#define AudioMemory_F32(num) ({ \
|
|
static audio_block_f32_t data_f32[num]; \
|
|
AudioStream_F32::initialize_f32_memory(data_f32, num); \
|
|
})
|
|
|
|
|
|
#define AudioMemoryUsage_F32() (AudioStream_F32::f32_memory_used)
|
|
#define AudioMemoryUsageMax_F32() (AudioStream_F32::f32_memory_used_max)
|
|
#define AudioMemoryUsageMaxReset_F32() (AudioStream_F32::f32_memory_used_max = AudioStream_F32::f32_memory_used)
|
|
|
|
class AudioStream_F32 : public AudioStream {
|
|
public:
|
|
AudioStream_F32(unsigned char n_input_f32, audio_block_f32_t **iqueue) : AudioStream(1, inputQueueArray_i16),
|
|
num_inputs_f32(n_input_f32), inputQueue_f32(iqueue) {
|
|
//active_f32 = false;
|
|
destination_list_f32 = NULL;
|
|
for (int i=0; i < n_input_f32; i++) {
|
|
inputQueue_f32[i] = NULL;
|
|
}
|
|
};
|
|
static void initialize_f32_memory(audio_block_f32_t *data, unsigned int num);
|
|
//virtual void update(audio_block_f32_t *) = 0;
|
|
static uint8_t f32_memory_used;
|
|
static uint8_t f32_memory_used_max;
|
|
|
|
protected:
|
|
//bool active_f32;
|
|
unsigned char num_inputs_f32;
|
|
static audio_block_f32_t * allocate_f32(void);
|
|
static void release(audio_block_f32_t * block);
|
|
void transmit(audio_block_f32_t *block, unsigned char index = 0);
|
|
audio_block_f32_t * receiveReadOnly_f32(unsigned int index = 0);
|
|
audio_block_f32_t * receiveWritable_f32(unsigned int index = 0);
|
|
friend class AudioConnection_F32;
|
|
private:
|
|
AudioConnection_F32 *destination_list_f32;
|
|
audio_block_f32_t **inputQueue_f32;
|
|
virtual void update(void) = 0;
|
|
audio_block_t *inputQueueArray_i16[1]; //two for stereo
|
|
static audio_block_f32_t *f32_memory_pool;
|
|
static uint32_t f32_memory_pool_available_mask[6];
|
|
};
|
|
|
|
|
|
|
|
#endif |