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Revise inputI2S and outputI2S for block size

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feature_setBlockSize
Chip Audette 8 years ago
parent f850f14e78
commit 20a68c6ab3
4 changed files with 181 additions and 37 deletions
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  1. 53
      input_i2s_f32.cpp
  2. 10
      input_i2s_f32.h
  3. 140
      output_i2s_f32.cpp
  4. 15
      output_i2s_f32.h

53
input_i2s_f32.cpp
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@ -36,6 +36,11 @@ bool AudioInputI2S_F32::update_responsibility = false;
DMAChannel AudioInputI2S_F32::dma(false); DMAChannel AudioInputI2S_F32::dma(false);
float AudioInputI2S_F32::sample_rate_Hz = AUDIO_SAMPLE_RATE;
int AudioInputI2S_F32::audio_block_samples = AUDIO_BLOCK_SAMPLES;
#define I2S_BUFFER_TO_USE_BYTES (AudioOutputI2S_F32::audio_block_samples*sizeof(i2s_rx_buffer[0]))
void AudioInputI2S_F32::begin(void) void AudioInputI2S_F32::begin(void)
{ {
dma.begin(true); // Allocate the DMA channel first dma.begin(true); // Allocate the DMA channel first
@ -44,6 +49,8 @@ void AudioInputI2S_F32::begin(void)
//block_right_1st = NULL; //block_right_1st = NULL;
// TODO: should we set & clear the I2S_RCSR_SR bit here? // TODO: should we set & clear the I2S_RCSR_SR bit here?
AudioOutputI2S_F32::sample_rate_Hz = sample_rate_Hz;
AudioOutputI2S_F32::audio_block_samples = audio_block_samples;
AudioOutputI2S_F32::config_i2s(); AudioOutputI2S_F32::config_i2s();
CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0 CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0
@ -55,9 +62,12 @@ void AudioInputI2S_F32::begin(void)
dma.TCD->SLAST = 0; dma.TCD->SLAST = 0;
dma.TCD->DADDR = i2s_rx_buffer; dma.TCD->DADDR = i2s_rx_buffer;
dma.TCD->DOFF = 2; dma.TCD->DOFF = 2;
dma.TCD->CITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //dma.TCD->CITER_ELINKNO = sizeof(i2s_tx_buffer) / 2; //original
dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer); dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;
dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //dma.TCD->DLASTSGA = -sizeof(i2s_rx_buffer); //original
dma.TCD->DLASTSGA = -I2S_BUFFER_TO_USE_BYTES;
//dma.TCD->BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2; //original
dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;
dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR; dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
#endif #endif
dma.triggerAtHardwareEvent(DMAMUX_SOURCE_I2S0_RX); dma.triggerAtHardwareEvent(DMAMUX_SOURCE_I2S0_RX);
@ -67,7 +77,9 @@ void AudioInputI2S_F32::begin(void)
I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR; I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
I2S0_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE; // TX clock enable, because sync'd to TX I2S0_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE; // TX clock enable, because sync'd to TX
dma.attachInterrupt(isr); dma.attachInterrupt(isr);
}
};
void AudioInputI2S_F32::isr(void) void AudioInputI2S_F32::isr(void)
{ {
@ -82,26 +94,33 @@ void AudioInputI2S_F32::isr(void)
#endif #endif
dma.clearInterrupt(); dma.clearInterrupt();
if (daddr < (uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2) { //if (daddr < (uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2) {
if (daddr < (uint32_t)i2s_rx_buffer + I2S_BUFFER_TO_USE_BYTES / 2) {
// DMA is receiving to the first half of the buffer // DMA is receiving to the first half of the buffer
// need to remove data from the second half // need to remove data from the second half
src = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //src = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original
end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES]; //end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES]; //original
src = (int16_t *)&i2s_rx_buffer[audio_block_samples/2];
end = (int16_t *)&i2s_rx_buffer[audio_block_samples];
if (AudioInputI2S_F32::update_responsibility) AudioStream_F32::update_all(); if (AudioInputI2S_F32::update_responsibility) AudioStream_F32::update_all();
} else { } else {
// DMA is receiving to the second half of the buffer // DMA is receiving to the second half of the buffer
// need to remove data from the first half // need to remove data from the first half
src = (int16_t *)&i2s_rx_buffer[0]; src = (int16_t *)&i2s_rx_buffer[0];
end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //end = (int16_t *)&i2s_rx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original
end = (int16_t *)&i2s_rx_buffer[audio_block_samples/2];
} }
left = AudioInputI2S_F32::block_left; left = AudioInputI2S_F32::block_left;
right = AudioInputI2S_F32::block_right; right = AudioInputI2S_F32::block_right;
if (left != NULL && right != NULL) { if (left != NULL && right != NULL) {
offset = AudioInputI2S_F32::block_offset; offset = AudioInputI2S_F32::block_offset;
if (offset <= AUDIO_BLOCK_SAMPLES/2) { //if (offset <= AUDIO_BLOCK_SAMPLES/2) { //original
if (offset <= ((uint32_t) audio_block_samples/2)) {
dest_left = &(left->data[offset]); dest_left = &(left->data[offset]);
dest_right = &(right->data[offset]); dest_right = &(right->data[offset]);
AudioInputI2S_F32::block_offset = offset + AUDIO_BLOCK_SAMPLES/2; //AudioInputI2S_F32::block_offset = offset + AUDIO_BLOCK_SAMPLES/2; //original
AudioInputI2S_F32::block_offset = offset + audio_block_samples/2;
do { do {
//n = *src++; //n = *src++;
//*dest_left++ = (int16_t)n; //*dest_left++ = (int16_t)n;
@ -114,7 +133,10 @@ void AudioInputI2S_F32::isr(void)
//digitalWriteFast(3, LOW); //digitalWriteFast(3, LOW);
} }
#define I16_TO_F32_NORM_FACTOR (3.051757812500000E-05) //which is 1/32768
void AudioInputI2S_F32::convert_i16_to_f32( int16_t *p_i16, float32_t *p_f32, int len) {
for (int i=0; i<len; i++) { *p_f32++ = ((float32_t)(*p_i16++)) * I16_TO_F32_NORM_FACTOR; }
}
void AudioInputI2S_F32::update(void) void AudioInputI2S_F32::update(void)
{ {
@ -130,7 +152,8 @@ void AudioInputI2S_F32::update(void)
} }
} }
__disable_irq(); __disable_irq();
if (block_offset >= AUDIO_BLOCK_SAMPLES) { //if (block_offset >= AUDIO_BLOCK_SAMPLES) { //original
if (block_offset >= audio_block_samples) {
// the DMA filled 2 blocks, so grab them and get the // the DMA filled 2 blocks, so grab them and get the
// 2 new blocks to the DMA, as quickly as possible // 2 new blocks to the DMA, as quickly as possible
out_left = block_left; out_left = block_left;
@ -153,9 +176,9 @@ void AudioInputI2S_F32::update(void)
} }
} }
if (out_left_f32 != NULL) { if (out_left_f32 != NULL) {
//convert to f32 //convert int16 to float 32
arm_q15_to_float((q15_t *)out_left->data, (float32_t *)out_left_f32->data, AUDIO_BLOCK_SAMPLES); convert_i16_to_f32(out_left->data, out_left_f32->data, audio_block_samples);
arm_q15_to_float((q15_t *)out_right->data, (float32_t *)out_right_f32->data, AUDIO_BLOCK_SAMPLES); convert_i16_to_f32(out_right->data, out_right_f32->data, audio_block_samples);
//transmit the f32 data! //transmit the f32 data!
AudioStream_F32::transmit(out_left_f32,0); AudioStream_F32::transmit(out_left_f32,0);

10
input_i2s_f32.h
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@ -36,9 +36,15 @@ class AudioInputI2S_F32 : public AudioStream_F32
{ {
//GUI: inputs:0, outputs:2 //this line used for automatic generation of GUI nodes //GUI: inputs:0, outputs:2 //this line used for automatic generation of GUI nodes
public: public:
AudioInputI2S_F32(void) : AudioStream_F32(0, NULL) { begin(); } AudioInputI2S_F32(const AudioSettings_F32 &settings) : AudioStream_F32(0, NULL) {
sample_rate_Hz = settings.sample_rate_Hz;
audio_block_samples = settings.audio_block_samples;
begin();
}
virtual void update(void); virtual void update(void);
static void convert_i16_to_f32( int16_t *p_i16, float32_t *p_f32, int len) ;
void begin(void); void begin(void);
//friend class AudioOutputI2S_F32;
protected: protected:
AudioInputI2S_F32(int dummy): AudioStream_F32(0, NULL) {} // to be used only inside AudioInputI2Sslave !! AudioInputI2S_F32(int dummy): AudioStream_F32(0, NULL) {} // to be used only inside AudioInputI2Sslave !!
static bool update_responsibility; static bool update_responsibility;
@ -47,6 +53,8 @@ protected:
private: private:
static audio_block_t *block_left; static audio_block_t *block_left;
static audio_block_t *block_right; static audio_block_t *block_right;
static float sample_rate_Hz;
static int audio_block_samples;
static uint16_t block_offset; static uint16_t block_offset;
}; };

140
output_i2s_f32.cpp
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@ -25,9 +25,54 @@
*/ */
#include "output_i2s_f32.h" #include "output_i2s_f32.h"
#include "memcpy_audio.h" //#include "input_i2s_f32.h"
//include "memcpy_audio.h"
//#include "memcpy_interleave.h"
#include <arm_math.h> #include <arm_math.h>
//Here's the function to change the sample rate of the system (via changing the clocking of the I2S bus)
//https://forum.pjrc.com/threads/38753-Discussion-about-a-simple-way-to-change-the-sample-rate?p=121365&viewfull=1#post121365
float setI2SFreq(const float freq_Hz) {
int freq = (int)freq_Hz;
typedef struct {
uint8_t mult;
uint16_t div;
} __attribute__((__packed__)) tmclk;
const int numfreqs = 16;
const int samplefreqs[numfreqs] = { 2000, 8000, 11025, 16000, 22050, 24000, 32000, 44100, 44117.64706 , 48000, 88200, 44117.64706 * 2, 96000, 176400, 44117.64706 * 4, 192000};
#if (F_PLL==16000000)
const tmclk clkArr[numfreqs] = {{4, 125}, {16, 125}, {148, 839}, {32, 125}, {145, 411}, {48, 125}, {64, 125}, {151, 214}, {12, 17}, {96, 125}, {151, 107}, {24, 17}, {192, 125}, {127, 45}, {48, 17}, {255, 83} };
#elif (F_PLL==72000000)
const tmclk clkArr[numfreqs] = {{832, 1125}, {32, 1125}, {49, 1250}, {64, 1125}, {49, 625}, {32, 375}, {128, 1125}, {98, 625}, {8, 51}, {64, 375}, {196, 625}, {16, 51}, {128, 375}, {249, 397}, {32, 51}, {185, 271} };
#elif (F_PLL==96000000)
const tmclk clkArr[numfreqs] = {{2, 375},{8, 375}, {73, 2483}, {16, 375}, {147, 2500}, {8, 125}, {32, 375}, {147, 1250}, {2, 17}, {16, 125}, {147, 625}, {4, 17}, {32, 125}, {151, 321}, {8, 17}, {64, 125} };
#elif (F_PLL==120000000)
const tmclk clkArr[numfreqs] = {{8, 1875},{32, 1875}, {89, 3784}, {64, 1875}, {147, 3125}, {32, 625}, {128, 1875}, {205, 2179}, {8, 85}, {64, 625}, {89, 473}, {16, 85}, {128, 625}, {178, 473}, {32, 85}, {145, 354} };
#elif (F_PLL==144000000)
const tmclk clkArr[numfreqs] = {{4, 1125},{16, 1125}, {49, 2500}, {32, 1125}, {49, 1250}, {16, 375}, {64, 1125}, {49, 625}, {4, 51}, {32, 375}, {98, 625}, {8, 51}, {64, 375}, {196, 625}, {16, 51}, {128, 375} };
#elif (F_PLL==180000000)
const tmclk clkArr[numfreqs] = {{23, 8086}, {46, 4043}, {49, 3125}, {73, 3208}, {98, 3125}, {37, 1084}, {183, 4021}, {196, 3125}, {16, 255}, {128, 1875}, {107, 853}, {32, 255}, {219, 1604}, {214, 853}, {64, 255}, {219, 802} };
#elif (F_PLL==192000000)
const tmclk clkArr[numfreqs] = {{1, 375}, {4, 375}, {37, 2517}, {8, 375}, {73, 2483}, {4, 125}, {16, 375}, {147, 2500}, {1, 17}, {8, 125}, {147, 1250}, {2, 17}, {16, 125}, {147, 625}, {4, 17}, {32, 125} };
#elif (F_PLL==216000000)
const tmclk clkArr[numfreqs] = {{8, 3375}, {32, 3375}, {49, 3750}, {64, 3375}, {49, 1875}, {32, 1125}, {128, 3375}, {98, 1875}, {8, 153}, {64, 1125}, {196, 1875}, {16, 153}, {128, 1125}, {226, 1081}, {32, 153}, {147, 646} };
#elif (F_PLL==240000000)
const tmclk clkArr[numfreqs] = {{4, 1875}, {16, 1875}, {29, 2466}, {32, 1875}, {89, 3784}, {16, 625}, {64, 1875}, {147, 3125}, {4, 85}, {32, 625}, {205, 2179}, {8, 85}, {64, 625}, {89, 473}, {16, 85}, {128, 625} };
#endif
for (int f = 0; f < numfreqs; f++) {
if ( freq == samplefreqs[f] ) {
while (I2S0_MCR & I2S_MCR_DUF) ;
I2S0_MDR = I2S_MDR_FRACT((clkArr[f].mult - 1)) | I2S_MDR_DIVIDE((clkArr[f].div - 1));
return (float)(F_PLL / 256 * clkArr[f].mult / clkArr[f].div);
}
}
return 0.0f;
}
audio_block_t * AudioOutputI2S_F32::block_left_1st = NULL; audio_block_t * AudioOutputI2S_F32::block_left_1st = NULL;
audio_block_t * AudioOutputI2S_F32::block_right_1st = NULL; audio_block_t * AudioOutputI2S_F32::block_right_1st = NULL;
audio_block_t * AudioOutputI2S_F32::block_left_2nd = NULL; audio_block_t * AudioOutputI2S_F32::block_left_2nd = NULL;
@ -35,9 +80,15 @@ audio_block_t * AudioOutputI2S_F32::block_right_2nd = NULL;
uint16_t AudioOutputI2S_F32::block_left_offset = 0; uint16_t AudioOutputI2S_F32::block_left_offset = 0;
uint16_t AudioOutputI2S_F32::block_right_offset = 0; uint16_t AudioOutputI2S_F32::block_right_offset = 0;
bool AudioOutputI2S_F32::update_responsibility = false; bool AudioOutputI2S_F32::update_responsibility = false;
DMAMEM static uint32_t i2s_tx_buffer[AUDIO_BLOCK_SAMPLES]; DMAMEM static uint32_t i2s_tx_buffer[AUDIO_BLOCK_SAMPLES]; //local audio_block_samples should be no larger than global AUDIO_BLOCK_SAMPLES
DMAChannel AudioOutputI2S_F32::dma(false); DMAChannel AudioOutputI2S_F32::dma(false);
float AudioOutputI2S_F32::sample_rate_Hz = AUDIO_SAMPLE_RATE;
int AudioOutputI2S_F32::audio_block_samples = AUDIO_BLOCK_SAMPLES;
#define I2S_BUFFER_TO_USE_BYTES (AudioOutputI2S_F32::audio_block_samples*sizeof(i2s_tx_buffer[0]))
void AudioOutputI2S_F32::begin(void) void AudioOutputI2S_F32::begin(void)
{ {
dma.begin(true); // Allocate the DMA channel first dma.begin(true); // Allocate the DMA channel first
@ -47,6 +98,7 @@ void AudioOutputI2S_F32::begin(void)
// TODO: should we set & clear the I2S_TCSR_SR bit here? // TODO: should we set & clear the I2S_TCSR_SR bit here?
config_i2s(); config_i2s();
CORE_PIN22_CONFIG = PORT_PCR_MUX(6); // pin 22, PTC1, I2S0_TXD0 CORE_PIN22_CONFIG = PORT_PCR_MUX(6); // pin 22, PTC1, I2S0_TXD0
#if defined(KINETISK) #if defined(KINETISK)
@ -54,12 +106,15 @@ void AudioOutputI2S_F32::begin(void)
dma.TCD->SOFF = 2; dma.TCD->SOFF = 2;
dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1); dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
dma.TCD->NBYTES_MLNO = 2; dma.TCD->NBYTES_MLNO = 2;
dma.TCD->SLAST = -sizeof(i2s_tx_buffer); //dma.TCD->SLAST = -sizeof(i2s_tx_buffer); //original
dma.TCD->SLAST = -I2S_BUFFER_TO_USE_BYTES;
dma.TCD->DADDR = &I2S0_TDR0; dma.TCD->DADDR = &I2S0_TDR0;
dma.TCD->DOFF = 0; dma.TCD->DOFF = 0;
dma.TCD->CITER_ELINKNO = sizeof(i2s_tx_buffer) / 2; //dma.TCD->CITER_ELINKNO = sizeof(i2s_tx_buffer) / 2; //original
dma.TCD->CITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;
dma.TCD->DLASTSGA = 0; dma.TCD->DLASTSGA = 0;
dma.TCD->BITER_ELINKNO = sizeof(i2s_tx_buffer) / 2; //dma.TCD->BITER_ELINKNO = sizeof(i2s_tx_buffer) / 2; //original
dma.TCD->BITER_ELINKNO = I2S_BUFFER_TO_USE_BYTES / 2;
dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR; dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
#endif #endif
dma.triggerAtHardwareEvent(DMAMUX_SOURCE_I2S0_TX); dma.triggerAtHardwareEvent(DMAMUX_SOURCE_I2S0_TX);
@ -69,6 +124,13 @@ void AudioOutputI2S_F32::begin(void)
I2S0_TCSR = I2S_TCSR_SR; I2S0_TCSR = I2S_TCSR_SR;
I2S0_TCSR = I2S_TCSR_TE | I2S_TCSR_BCE | I2S_TCSR_FRDE; I2S0_TCSR = I2S_TCSR_TE | I2S_TCSR_BCE | I2S_TCSR_FRDE;
dma.attachInterrupt(isr); dma.attachInterrupt(isr);
// change the I2S frequencies to make the requested sample rate
setI2SFreq(AudioOutputI2S_F32::sample_rate_Hz);
enabled = 1;
//AudioInputI2S_F32::begin_guts();
} }
@ -81,10 +143,12 @@ void AudioOutputI2S_F32::isr(void)
saddr = (uint32_t)(dma.TCD->SADDR); saddr = (uint32_t)(dma.TCD->SADDR);
dma.clearInterrupt(); dma.clearInterrupt();
if (saddr < (uint32_t)i2s_tx_buffer + sizeof(i2s_tx_buffer) / 2) { //if (saddr < (uint32_t)i2s_tx_buffer + sizeof(i2s_tx_buffer) / 2) { //original
if (saddr < (uint32_t)i2s_tx_buffer + I2S_BUFFER_TO_USE_BYTES / 2) {
// DMA is transmitting the first half of the buffer // DMA is transmitting the first half of the buffer
// so we must fill the second half // so we must fill the second half
dest = (int16_t *)&i2s_tx_buffer[AUDIO_BLOCK_SAMPLES/2]; //dest = (int16_t *)&i2s_tx_buffer[AUDIO_BLOCK_SAMPLES/2]; //original
dest = (int16_t *)&i2s_tx_buffer[audio_block_samples/2];
if (AudioOutputI2S_F32::update_responsibility) AudioStream_F32::update_all(); if (AudioOutputI2S_F32::update_responsibility) AudioStream_F32::update_all();
} else { } else {
// DMA is transmitting the second half of the buffer // DMA is transmitting the second half of the buffer
@ -97,6 +161,7 @@ void AudioOutputI2S_F32::isr(void)
offsetL = AudioOutputI2S_F32::block_left_offset; offsetL = AudioOutputI2S_F32::block_left_offset;
offsetR = AudioOutputI2S_F32::block_right_offset; offsetR = AudioOutputI2S_F32::block_right_offset;
/* Original
if (blockL && blockR) { if (blockL && blockR) {
memcpy_tointerleaveLR(dest, blockL->data + offsetL, blockR->data + offsetR); memcpy_tointerleaveLR(dest, blockL->data + offsetL, blockR->data + offsetR);
offsetL += AUDIO_BLOCK_SAMPLES / 2; offsetL += AUDIO_BLOCK_SAMPLES / 2;
@ -111,8 +176,34 @@ void AudioOutputI2S_F32::isr(void)
memset(dest,0,AUDIO_BLOCK_SAMPLES * 2); memset(dest,0,AUDIO_BLOCK_SAMPLES * 2);
return; return;
} }
*/
int16_t *d = dest;
if (blockL && blockR) {
//memcpy_tointerleaveLR(dest, blockL->data + offsetL, blockR->data + offsetR);
//memcpy_tointerleaveLRwLen(dest, blockL->data + offsetL, blockR->data + offsetR, audio_block_samples/2);
int16_t *pL = blockL->data + offsetL;
int16_t *pR = blockR->data + offsetR;
for (int i=0; i < audio_block_samples/2; i++) { *d++ = *pL++; *d++ = *pR++; } //interleave
offsetL += audio_block_samples / 2;
offsetR += audio_block_samples / 2;
} else if (blockL) {
//memcpy_tointerleaveLR(dest, blockL->data + offsetL, blockR->data + offsetR);
int16_t *pL = blockL->data + offsetL;
for (int i=0; i < audio_block_samples / 2 * 2; i+=2) { *(d+i) = *pL++; } //interleave
offsetL += audio_block_samples / 2;
} else if (blockR) {
int16_t *pR = blockR->data + offsetR;
for (int i=0; i < audio_block_samples /2 * 2; i+=2) { *(d+i) = *pR++; } //interleave
offsetR += audio_block_samples / 2;
} else {
//memset(dest,0,AUDIO_BLOCK_SAMPLES * 2);
memset(dest,0,audio_block_samples * 2);
return;
}
if (offsetL < AUDIO_BLOCK_SAMPLES) { //if (offsetL < AUDIO_BLOCK_SAMPLES) { //original
if (offsetL < (uint16_t)audio_block_samples) {
AudioOutputI2S_F32::block_left_offset = offsetL; AudioOutputI2S_F32::block_left_offset = offsetL;
} else { } else {
AudioOutputI2S_F32::block_left_offset = 0; AudioOutputI2S_F32::block_left_offset = 0;
@ -120,7 +211,8 @@ void AudioOutputI2S_F32::isr(void)
AudioOutputI2S_F32::block_left_1st = AudioOutputI2S_F32::block_left_2nd; AudioOutputI2S_F32::block_left_1st = AudioOutputI2S_F32::block_left_2nd;
AudioOutputI2S_F32::block_left_2nd = NULL; AudioOutputI2S_F32::block_left_2nd = NULL;
} }
if (offsetR < AUDIO_BLOCK_SAMPLES) { //if (offsetR < AUDIO_BLOCK_SAMPLES) {
if (offsetR < (uint16_t)audio_block_samples) {
AudioOutputI2S_F32::block_right_offset = offsetR; AudioOutputI2S_F32::block_right_offset = offsetR;
} else { } else {
AudioOutputI2S_F32::block_right_offset = 0; AudioOutputI2S_F32::block_right_offset = 0;
@ -199,8 +291,9 @@ void AudioOutputI2S_F32::isr(void)
#endif #endif
} }
void AudioOutputI2S_F32::convert_f32_to_i16(float32_t *p_f32, int16_t *p_i16, int len) {
for (int i=0; i<len; i++) { *p_i16++ = max(-32768,min(32768,(int16_t)((*p_f32++) * 32768.f))); }
}
void AudioOutputI2S_F32::update(void) void AudioOutputI2S_F32::update(void)
{ {
@ -213,10 +306,18 @@ void AudioOutputI2S_F32::update(void)
audio_block_f32_t *block_f32; audio_block_f32_t *block_f32;
block_f32 = receiveReadOnly_f32(0); // input 0 = left channel block_f32 = receiveReadOnly_f32(0); // input 0 = left channel
if (block_f32) { if (block_f32) {
if (block_f32->length != audio_block_samples) {
Serial.print("AudioOutputI2S_F32: *** WARNING ***: audio_block says len = ");
Serial.print(block_f32->length);
Serial.print(", but I2S settings want it to be = ");
Serial.println(audio_block_samples);
}
//Serial.print("AudioOutputI2S_F32: audio_block_samples = ");
//Serial.println(audio_block_samples);
//convert F32 to Int16 //convert F32 to Int16
block = AudioStream::allocate(); block = AudioStream::allocate();
arm_float_to_q15((float32_t *)(block_f32->data),(q15_t *)(block->data), AUDIO_BLOCK_SAMPLES); convert_f32_to_i16(block_f32->data, block->data, audio_block_samples);
AudioStream_F32::release(block_f32); AudioStream_F32::release(block_f32);
//now process the data blocks //now process the data blocks
@ -242,7 +343,7 @@ void AudioOutputI2S_F32::update(void)
if (block_f32) { if (block_f32) {
//convert F32 to Int16 //convert F32 to Int16
block = AudioStream::allocate(); block = AudioStream::allocate();
arm_float_to_q15((float32_t *)(block_f32->data),(q15_t *)(block->data), AUDIO_BLOCK_SAMPLES); convert_f32_to_i16(block_f32->data, block->data, audio_block_samples);
AudioStream_F32::release(block_f32); AudioStream_F32::release(block_f32);
__disable_irq(); __disable_irq();
@ -305,11 +406,11 @@ void AudioOutputI2S_F32::update(void)
#endif #endif
#ifndef MCLK_SRC #ifndef MCLK_SRC
#if F_CPU >= 20000000 #if (F_CPU >= 20000000)
#define MCLK_SRC 3 // the PLL #define MCLK_SRC 3 // the PLL
#else #else
#define MCLK_SRC 0 // system clock #define MCLK_SRC 0 // system clock
#endif #endif
#endif #endif
void AudioOutputI2S_F32::config_i2s(void) void AudioOutputI2S_F32::config_i2s(void)
@ -432,4 +533,5 @@ void AudioOutputI2Sslave::config_i2s(void)
CORE_PIN9_CONFIG = PORT_PCR_MUX(6); // pin 9, PTC3, I2S0_TX_BCLK CORE_PIN9_CONFIG = PORT_PCR_MUX(6); // pin 9, PTC3, I2S0_TX_BCLK
CORE_PIN11_CONFIG = PORT_PCR_MUX(6); // pin 11, PTC6, I2S0_MCLK CORE_PIN11_CONFIG = PORT_PCR_MUX(6); // pin 11, PTC6, I2S0_MCLK
} }
*/ */

15
output_i2s_f32.h
Unescape View File

@ -32,16 +32,24 @@
#include "AudioStream.h" #include "AudioStream.h"
#include "DMAChannel.h" #include "DMAChannel.h"
class AudioOutputI2S_F32 : public AudioStream_F32 class AudioOutputI2S_F32 : public AudioStream_F32
{ {
//GUI: inputs:2, outputs:0 //this line used for automatic generation of GUI node //GUI: inputs:2, outputs:0 //this line used for automatic generation of GUI node
public: public:
AudioOutputI2S_F32(void) : AudioStream_F32(2, inputQueueArray) { begin(); } AudioOutputI2S_F32(const AudioSettings_F32 &settings) : AudioStream_F32(2, inputQueueArray)
{
sample_rate_Hz = settings.sample_rate_Hz;
audio_block_samples = settings.audio_block_samples;
begin();
}
virtual void update(void); virtual void update(void);
void begin(void); void begin(void);
friend class AudioInputI2S_F32; friend class AudioInputI2S_F32;
static void convert_f32_to_i16( float32_t *p_f32, int16_t *p_i16, int len) ;
protected: protected:
AudioOutputI2S_F32(int dummy): AudioStream_F32(2, inputQueueArray) {} // to be used only inside AudioOutputI2Sslave !! //AudioOutputI2S_F32(const AudioSettings &settings): AudioStream_F32(2, inputQueueArray) {} // to be used only inside AudioOutputI2Sslave !!
static void config_i2s(void); static void config_i2s(void);
static audio_block_t *block_left_1st; static audio_block_t *block_left_1st;
static audio_block_t *block_right_1st; static audio_block_t *block_right_1st;
@ -54,6 +62,9 @@ private:
static uint16_t block_left_offset; static uint16_t block_left_offset;
static uint16_t block_right_offset; static uint16_t block_right_offset;
audio_block_f32_t *inputQueueArray[2]; audio_block_f32_t *inputQueueArray[2];
static float sample_rate_Hz;
static int audio_block_samples;
volatile uint8_t enabled = 1;
}; };

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