nick/DS5Dongle-OLED-Edition-steam-machine
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speaker work

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This commit is contained in:
awalol
2026-04-26 11:34:34 +08:00
parent 50d7f29365
commit 2fb3c2f90b
5 changed files with 106 additions and 18 deletions
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src/audio.cpp
+83 -10
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@@ -8,41 +8,73 @@
#include "tusb.h"
#include "usb.h"
#include <algorithm>
#include <cstdio>
#include "opus.h"
#include "utils.h"
#include "pico/multicore.h"
#include "pico/util/queue.h"
#define INPUT_CHANNELS 4
#define OUTPUT_CHANNELS 2
#define SAMPLE_SIZE 64
#define REPORT_SIZE 142
#define REPORT_ID 0x32
#define REPORT_SIZE 398
#define REPORT_ID 0x36
// #define VOLUME_GAIN 2
#define BUFFER_LENGTH 48
static WDL_Resampler resampler;
static uint8_t reportSeqCounter = 0;
static uint8_t packetCounter = 0;
alignas(8) static uint32_t audio_core1_stack[8192];
queue_t audio_fifo;
queue_t opus_fifo;
struct audio_raw_element {
int16_t data[480 * 2];
};
struct opus_element {
uint8_t data[200];
};
void audio_loop() {
// 1. 读取 USB 音频数据
if (!tud_audio_available()) return;
int16_t raw[192]; // 48000 / 3000 = 16, 64 * 16 = 1024
uint32_t bytes_read = tud_audio_read(raw, sizeof(raw));
int16_t raw[192];
uint32_t bytes_read = tud_audio_read(raw, sizeof(raw)); // 每次读入 384 bytes
int frames = bytes_read / (INPUT_CHANNELS * sizeof(int16_t));
if (frames == 0){
if (frames == 0) {
return;
}
static int16_t audio_buf[480 * 2];
static uint audio_buf_pos = 0;
// 2. 从4ch中提取ch3/ch4，转换为float输入重采样器
WDL_ResampleSample *in_buf;
int nframes = resampler.ResamplePrepare(frames, OUTPUT_CHANNELS, &in_buf);
for (int i = 0; i < nframes; i++) {
audio_buf[audio_buf_pos++] = raw[i * INPUT_CHANNELS];
audio_buf[audio_buf_pos++] = raw[i * INPUT_CHANNELS + 1];
if (audio_buf_pos == 480 * 2) {
audio_raw_element element{};
memcpy(element.data,audio_buf,480 * 2 * 2);
if (queue_is_full(&audio_fifo)){
queue_try_remove(&audio_fifo,NULL);
}
if (!queue_try_add(&audio_fifo,&element)) {
printf("[Audio] Warning: audio_fifo add failed\n");
}
audio_buf_pos = 0;
}
in_buf[i * 2] = (WDL_ResampleSample) raw[i * INPUT_CHANNELS + 2] / 32768.0f;
in_buf[i * 2 + 1] = (WDL_ResampleSample) raw[i * INPUT_CHANNELS + 3] / 32768.0f;
}
// 3. 48kHz -> 3kHz 重采样
WDL_ResampleSample out_buf[SAMPLE_SIZE]; // 64 floats = 32帧 × 2ch
WDL_ResampleSample out_buf[SAMPLE_SIZE]; // 64 floats = 32帧 × 2ch
int out_frames = resampler.ResampleOut(out_buf, nframes, SAMPLE_SIZE / OUTPUT_CHANNELS, OUTPUT_CHANNELS);
static int8_t haptic_buf[SAMPLE_SIZE];
@@ -50,15 +82,15 @@ void audio_loop() {
// 4. 转换为int8并缓冲，满64字节即组包发送
for (int i = 0; i < out_frames; i++) {
int val_l = (int) (out_buf[i * 2] * 127.0f * (volume[0] ?: 1));
int val_r = (int) (out_buf[i * 2 + 1] * 127.0f * (volume[0] ?: 1));
int val_l = (int) (out_buf[i * 2] * 127.0f * (volume[0] ? : 1));
int val_r = (int) (out_buf[i * 2 + 1] * 127.0f * (volume[0] ? : 1));
haptic_buf[haptic_buf_pos++] = (int8_t) std::clamp(val_l, -128, 127); // 似乎clamp有点多余？还是以防万一吧
haptic_buf[haptic_buf_pos++] = (int8_t) std::clamp(val_r, -128, 127);
if (haptic_buf_pos != SAMPLE_SIZE) {
continue;
}
uint8_t pkt[REPORT_SIZE] = {};
uint8_t pkt[REPORT_SIZE]{};
pkt[0] = REPORT_ID;
pkt[1] = reportSeqCounter << 4;
reportSeqCounter = (reportSeqCounter + 1) & 0x0F;
@@ -74,6 +106,16 @@ void audio_loop() {
pkt[11] = 0x12 | (1 << 7);
pkt[12] = SAMPLE_SIZE;
memcpy(pkt + 13, haptic_buf, SAMPLE_SIZE);
if (!queue_is_empty(&opus_fifo)) {
pkt[77] = 0x16 | 0 << 6 | 1 << 7;
pkt[78] = 200;
opus_element opus_element{};
if (!queue_try_remove(&opus_fifo,&opus_element)) {
printf("[Audio] Warning: opus_fifo try remove failed");
}else {
memcpy(pkt + 79,opus_element.data,200);
}
}
bt_write(pkt, sizeof(pkt));
haptic_buf_pos = 0;
@@ -84,5 +126,36 @@ void audio_init() {
resampler.SetMode(true, 0, false);
resampler.SetRates(48000, 3000);
resampler.SetFeedMode(true);
resampler.Prealloc(2, 480, 32);
// resampler.Prealloc(2, 480, 32);
queue_init(&audio_fifo,sizeof(audio_raw_element),2);
queue_init(&opus_fifo,sizeof(opus_element),2);
multicore_launch_core1_with_stack(core1_entry,audio_core1_stack,sizeof(audio_core1_stack));
}
static OpusEncoder *encoder;
void core1_entry() {
int error = 0;
encoder = opus_encoder_create(48000,2,OPUS_APPLICATION_AUDIO,&error);
if (error != 0) {
printf("[Audio] OpusEncoder create failed\n");
return;
}
opus_encoder_ctl(encoder,OPUS_SET_EXPERT_FRAME_DURATION(OPUS_FRAMESIZE_10_MS));
opus_encoder_ctl(encoder,OPUS_SET_BITRATE(200 * 8 * 100));
opus_encoder_ctl(encoder,OPUS_SET_VBR(false));
opus_encoder_ctl(encoder,OPUS_SET_COMPLEXITY(0));
while (true) {
audio_raw_element audio_element{};
queue_remove_blocking(&audio_fifo,&audio_element);
opus_element opus_element{};
(void)opus_encode(encoder,audio_element.data,480,opus_element.data,200);
if (queue_is_full(&opus_fifo)) {
queue_try_remove(&opus_fifo,NULL);
}
if (!queue_try_add(&opus_fifo,&opus_element)) {
printf("[Audio] Warning: opus_fifo add failed\n");
}
}
}