nick/DS5Dongle-OLED-Edition-steam-machine
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set buffer length

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This commit is contained in:
awalol
2026-03-21 11:01:52 +08:00
parent 3600499a4a
commit 8c8af7b97c
6 changed files with 24 additions and 39 deletions
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src/audio.cpp
+10 -9
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@@ -14,6 +14,7 @@
#define REPORT_SIZE 142
#define REPORT_ID 0x32
#define VOLUME_GAIN 2
#define BUFFER_LENGTH 55
static WDL_Resampler resampler;
static uint8_t reportSeqCounter = 0;
@@ -23,7 +24,7 @@ void audio_loop() {
// 1. 读取 USB 音频数据
if (!tud_audio_available()) return;
int16_t raw[1024]; // 48000 / 3000 = 16, 64 * 16 = 1024
int16_t raw[192]; // 48000 / 3000 = 16, 64 * 16 = 1024
uint32_t bytes_read = tud_audio_read(raw, sizeof(raw));
int frames = bytes_read / (INPUT_CHANNELS * sizeof(int16_t));
if (frames == 0){
@@ -32,16 +33,16 @@ void audio_loop() {
// 2. 从4ch中提取ch3/ch4，转换为float输入重采样器
WDL_ResampleSample *in_buf;
int nsamples = resampler.ResamplePrepare(frames, OUTPUT_CHANNELS, &in_buf);
int nframes = resampler.ResamplePrepare(frames, OUTPUT_CHANNELS, &in_buf);
for (int i = 0; i < nsamples; i++) {
for (int i = 0; i < nframes; i++) {
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
int out_frames = resampler.ResampleOut(out_buf, nsamples, SAMPLE_SIZE / OUTPUT_CHANNELS, OUTPUT_CHANNELS);
int out_frames = resampler.ResampleOut(out_buf, nframes, SAMPLE_SIZE / OUTPUT_CHANNELS, OUTPUT_CHANNELS);
static int8_t haptic_buf[SAMPLE_SIZE];
static int haptic_buf_pos = 0;
@@ -63,11 +64,11 @@ void audio_loop() {
pkt[2] = 0x11 | (1 << 7);
pkt[3] = 7;
pkt[4] = 0b11111110;
pkt[5] = 0;
pkt[6] = 0;
pkt[7] = 0;
pkt[8] = 0;
pkt[9] = 0xFF;
pkt[5] = BUFFER_LENGTH;
pkt[6] = BUFFER_LENGTH;
pkt[7] = BUFFER_LENGTH;
pkt[8] = BUFFER_LENGTH;
pkt[9] = BUFFER_LENGTH; // buffer length
pkt[10] = packetCounter++;
pkt[11] = 0x12 | (1 << 7);
pkt[12] = SAMPLE_SIZE;