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snapclient/components/dsp_processor/dsp_processor.c
Carlos 0ea47690fa - clean up code 
- add pre commit using GNU style
- remove some minor issues regarding the use of global variables and such
2021-08-27 10:31:30 +02:00

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#include <stdint.h>
#include <string.h>
#include <sys/time.h>
#include "freertos/FreeRTOS.h"
#if CONFIG_USE_DSP_PROCESSOR
#include "freertos/ringbuf.h"
#include "freertos/task.h"
#include "driver/i2s.h"
#include "dsps_biquad.h"
#include "dsps_biquad_gen.h"
#include "esp_log.h"
#include "board_pins_config.h"
#include "driver/dac.h"
#include "driver/i2s.h"
#include "dsp_processor.h"
#include "hal/i2s_hal.h"
#ifdef CONFIG_USE_BIQUAD_ASM
#define BIQUAD dsps_biquad_f32_ae32
#else
#define BIQUAD dsps_biquad_f32
#endif
static const char *TAG = "dspProc";
static float *sbuffer0 = NULL;
static float *sbufout0 = NULL;
static float *sbuftmp0 = NULL;
static uint32_t currentSamplerate = 0;
static uint32_t currentChunkDurationMs = 0;
static ptype_t bq[8];
int
dsp_processor (char *audio, size_t chunk_size, dspFlows_t dspFlow)
{
double dynamic_vol = 1.0;
int16_t len = chunk_size / 4;
int16_t valint;
uint16_t i;
if ((sbuffer0 == NULL) || (sbufout0 == NULL) || (sbuftmp0 == NULL))
{
ESP_LOGE (TAG, "No Memory allocated for dsp_processor %p %p %p",
sbuffer0, sbufout0, sbuftmp0);
return -1;
}
switch (dspFlow)
{
case dspfStereo:
{
}
break;
case dspfBassBoost:
{ // CH0 low shelf 6dB @ 400Hz
// channel 0
for (i = 0; i < len; i++)
{
sbuffer0[i] = dynamic_vol * 0.5
* ((float)((int16_t) (audio[i * 4 + 1] << 8)
+ audio[i * 4 + 0]))
/ 32768;
}
BIQUAD (sbuffer0, sbufout0, len, bq[6].coeffs, bq[6].w);
for (i = 0; i < len; i++)
{
valint = (int16_t) (sbufout0[i] * 32768);
audio[i * 4 + 0] = (valint & 0x00ff);
audio[i * 4 + 1] = ((valint & 0xff00) >> 8);
}
// channel 1
for (i = 0; i < len; i++)
{
sbuffer0[i] = dynamic_vol * 0.5
* ((float)((int16_t) (audio[i * 4 + 3] << 8)
+ audio[i * 4 + 2]))
/ 32768;
}
BIQUAD (sbuffer0, sbufout0, len, bq[7].coeffs, bq[7].w);
for (i = 0; i < len; i++)
{
valint = (int16_t) (sbufout0[i] * 32768);
audio[i * 4 + 2] = (valint & 0x00ff);
audio[i * 4 + 3] = ((valint & 0xff00) >> 8);
}
}
break;
case dspfBiamp:
{
// Process audio ch0 LOW PASS FILTER
for (i = 0; i < len; i++)
{
sbuffer0[i] = dynamic_vol * 0.5
* ((float)((int16_t) (audio[i * 4 + 1] << 8)
+ audio[i * 4 + 0]))
/ 32768;
}
BIQUAD (sbuffer0, sbuftmp0, len, bq[0].coeffs, bq[0].w);
BIQUAD (sbuftmp0, sbufout0, len, bq[1].coeffs, bq[1].w);
for (i = 0; i < len; i++)
{
valint = (int16_t) (sbufout0[i] * 32768);
audio[i * 4 + 0] = (valint & 0x00ff);
audio[i * 4 + 1] = ((valint & 0xff00) >> 8);
}
// Process audio ch1 HIGH PASS FILTER
for (i = 0; i < len; i++)
{
sbuffer0[i] = dynamic_vol * 0.5
* ((float)((int16_t) (audio[i * 4 + 3] << 8)
+ audio[i * 4 + 2]))
/ 32768;
}
BIQUAD (sbuffer0, sbuftmp0, len, bq[2].coeffs, bq[2].w);
BIQUAD (sbuftmp0, sbufout0, len, bq[3].coeffs, bq[3].w);
for (i = 0; i < len; i++)
{
valint = (int16_t) (sbufout0[i] * 32768);
audio[i * 4 + 2] = (valint & 0x00ff);
audio[i * 4 + 3] = ((valint & 0xff00) >> 8);
}
}
break;
case dspf2DOT1:
{ // Process audio L + R LOW PASS FILTER
/*
BIQUAD(sbuffer2, sbuftmp0, len, bq[0].coeffs, bq[0].w);
BIQUAD(sbuftmp0, sbufout2, len, bq[1].coeffs, bq[1].w);
// Process audio L HIGH PASS FILTER
BIQUAD(sbuffer0, sbuftmp0, len, bq[2].coeffs, bq[2].w);
BIQUAD(sbuftmp0, sbufout0, len, bq[3].coeffs, bq[3].w);
// Process audio R HIGH PASS FILTER
BIQUAD(sbuffer1, sbuftmp0, len, bq[4].coeffs, bq[4].w);
BIQUAD(sbuftmp0, sbufout1, len, bq[5].coeffs, bq[5].w);
int16_t valint[5];
for (uint16_t i = 0; i < len; i++) {
valint[0] =
(muteCH[0] == 1) ? (int16_t)0 : (int16_t)(sbufout0[i] *
32768); valint[1] = (muteCH[1] == 1) ? (int16_t)0 :
(int16_t)(sbufout1[i] * 32768); valint[2] = (muteCH[2] == 1) ?
(int16_t)0 : (int16_t)(sbufout2[i] * 32768); dsp_audio[i * 4 + 0] =
(valint[2] & 0xff); dsp_audio[i * 4 + 1] = ((valint[2] & 0xff00) >>
8); dsp_audio[i * 4 + 2] = 0; dsp_audio[i * 4 + 3] = 0;
dsp_audio1[i * 4 + 0] = (valint[0] & 0xff);
dsp_audio1[i * 4 + 1] = ((valint[0] & 0xff00) >> 8);
dsp_audio1[i * 4 + 2] = (valint[1] & 0xff);
dsp_audio1[i * 4 + 3] = ((valint[1] & 0xff00) >> 8);
}
// TODO: this copy could be avoided if dsp_audio buffers are
// allocated dynamically and pointers are exchanged after
// audio was freed
memcpy(audio, dsp_audio, chunk_size);
ESP_LOGW(TAG, "Don't know what to do with dsp_audio1");
*/
ESP_LOGW (TAG, "dspf2DOT1, not implemented yet, using stereo instead");
}
break;
case dspfFunkyHonda:
{ // Process audio L + R LOW PASS FILTER
/*
BIQUAD(sbuffer2, sbuftmp0, len, bq[0].coeffs, bq[0].w);
BIQUAD(sbuftmp0, sbufout2, len, bq[1].coeffs, bq[1].w);
// Process audio L HIGH PASS FILTER
BIQUAD(sbuffer0, sbuftmp0, len, bq[2].coeffs, bq[2].w);
BIQUAD(sbuftmp0, sbufout0, len, bq[3].coeffs, bq[3].w);
// Process audio R HIGH PASS FILTER
BIQUAD(sbuffer1, sbuftmp0, len, bq[4].coeffs, bq[4].w);
BIQUAD(sbuftmp0, sbufout1, len, bq[5].coeffs, bq[5].w);
uint16_t scale = 16384; // 32768
int16_t valint[5];
for (uint16_t i = 0; i < len; i++) {
valint[0] =
(muteCH[0] == 1) ? (int16_t)0 : (int16_t)(sbufout0[i] * scale);
valint[1] =
(muteCH[1] == 1) ? (int16_t)0 : (int16_t)(sbufout1[i] * scale);
valint[2] =
(muteCH[2] == 1) ? (int16_t)0 : (int16_t)(sbufout2[i] * scale);
valint[3] = valint[0] + valint[2];
valint[4] = -valint[2];
valint[5] = -valint[1] - valint[2];
dsp_audio[i * 4 + 0] = (valint[3] & 0xff);
dsp_audio[i * 4 + 1] = ((valint[3] & 0xff00) >> 8);
dsp_audio[i * 4 + 2] = (valint[2] & 0xff);
dsp_audio[i * 4 + 3] = ((valint[2] & 0xff00) >> 8);
dsp_audio1[i * 4 + 0] = (valint[4] & 0xff);
dsp_audio1[i * 4 + 1] = ((valint[4] & 0xff00) >> 8);
dsp_audio1[i * 4 + 2] = (valint[5] & 0xff);
dsp_audio1[i * 4 + 3] = ((valint[5] & 0xff00) >> 8);
}
// TODO: this copy could be avoided if dsp_audio buffers are
// allocated dynamically and pointers are exchanged after
// audio was freed
memcpy(audio, dsp_audio, chunk_size);
ESP_LOGW(TAG, "Don't know what to do with dsp_audio1");
*/
ESP_LOGW (TAG,
"dspfFunkyHonda, not implemented yet, using stereo instead");
}
break;
default:
{
}
break;
}
return 0;
}
// ESP32 DSP processor
//======================================================
// Each time a buffer of audio is passed to the DSP - samples are
// processed according to a dynamic list of audio processing nodes.
// Each audio processor node consist of a data struct holding the
// required weights and states for processing an automomous processing
// function. The high level parameters is maintained in the structure
// as well
// Release - Prove off concept
// ----------------------------------------
// Fixed 2x2 biquad flow Xover for biAmp systems
// Interface for cross over frequency and level
void
dsp_setup_flow (double freq, uint32_t samplerate, uint32_t chunkDurationMs)
{
float f = freq / samplerate / 2.0;
uint16_t len = (samplerate * chunkDurationMs / 1000);
if (((currentSamplerate == samplerate)
&& (currentChunkDurationMs == chunkDurationMs))
|| (samplerate == 0) || (chunkDurationMs == 0))
{
return;
}
currentSamplerate = samplerate;
currentChunkDurationMs = chunkDurationMs;
bq[0]
= (ptype_t){ LPF, f, 0, 0.707, NULL, NULL, { 0, 0, 0, 0, 0 }, { 0, 0 } };
bq[1]
= (ptype_t){ LPF, f, 0, 0.707, NULL, NULL, { 0, 0, 0, 0, 0 }, { 0, 0 } };
bq[2]
= (ptype_t){ HPF, f, 0, 0.707, NULL, NULL, { 0, 0, 0, 0, 0 }, { 0, 0 } };
bq[3]
= (ptype_t){ HPF, f, 0, 0.707, NULL, NULL, { 0, 0, 0, 0, 0 }, { 0, 0 } };
bq[4]
= (ptype_t){ HPF, f, 0, 0.707, NULL, NULL, { 0, 0, 0, 0, 0 }, { 0, 0 } };
bq[5]
= (ptype_t){ HPF, f, 0, 0.707, NULL, NULL, { 0, 0, 0, 0, 0 }, { 0, 0 } };
bq[6] = (ptype_t){ LOWSHELF, f, 6, 0.707, NULL, NULL,
{ 0, 0, 0, 0, 0 }, { 0, 0 } };
bq[7] = (ptype_t){ LOWSHELF, f, 6, 0.707, NULL, NULL,
{ 0, 0, 0, 0, 0 }, { 0, 0 } };
for (uint8_t n = 0; n <= 7; n++)
{
switch (bq[n].filtertype)
{
case LOWSHELF:
dsps_biquad_gen_lowShelf_f32 (bq[n].coeffs, bq[n].freq, bq[n].gain,
bq[n].q);
break;
case LPF:
dsps_biquad_gen_lpf_f32 (bq[n].coeffs, bq[n].freq, bq[n].q);
break;
case HPF:
dsps_biquad_gen_hpf_f32 (bq[n].coeffs, bq[n].freq, bq[n].q);
break;
default:
break;
}
// for (uint8_t i = 0; i <= 4; i++) {
// printf("%.6f ", bq[n].coeffs[i]);
// }
// printf("\n");
}
if (sbuffer0 != NULL)
{
free (sbuffer0);
sbuffer0 = NULL;
}
if (sbufout0 != NULL)
{
free (sbufout0);
sbufout0 = NULL;
}
if (sbuftmp0 != NULL)
{
free (sbuftmp0);
sbuftmp0 = NULL;
}
sbuffer0 = (float *)heap_caps_malloc (sizeof (float) * len, MALLOC_CAP_8BIT);
sbufout0 = (float *)heap_caps_malloc (sizeof (float) * len, MALLOC_CAP_8BIT);
sbuftmp0 = (float *)heap_caps_malloc (sizeof (float) * len, MALLOC_CAP_8BIT);
if ((sbuffer0 == NULL) || (sbufout0 == NULL) || (sbuftmp0 == NULL))
{
ESP_LOGE (TAG,
"Failed to allocate initial memory for dsp_processor %p %p %p",
sbuffer0, sbufout0, sbuftmp0);
if (sbuffer0)
{
free (sbuffer0);
}
if (sbufout0)
{
free (sbufout0);
}
if (sbuftmp0)
{
free (sbuftmp0);
}
}
else
{
ESP_LOGI (TAG, "GOT memory for dsp_processor %p %p", sbuffer0, sbufout0);
}
}
void
dsp_set_xoverfreq (uint8_t freqh, uint8_t freql, uint32_t samplerate)
{
float freq = freqh * 256 + freql;
// printf("%f\n", freq);
float f = freq / samplerate / 2.;
for (int8_t n = 0; n <= 5; n++)
{
bq[n].freq = f;
switch (bq[n].filtertype)
{
case LPF:
// for (uint8_t i = 0; i <= 4; i++) {
// printf("%.6f ", bq[n].coeffs[i]);
// }
// printf("\n");
dsps_biquad_gen_lpf_f32 (bq[n].coeffs, bq[n].freq, bq[n].q);
// for (uint8_t i = 0; i <= 4; i++) {
// printf("%.6f ", bq[n].coeffs[i]);
// }
// printf("%f \n", bq[n].freq);
break;
case HPF:
dsps_biquad_gen_hpf_f32 (bq[n].coeffs, bq[n].freq, bq[n].q);
break;
default:
break;
}
}
}
#endif
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