fix: usbaudio set_cur cmd set volume

src/audio.cpp

@@ -13,6 +13,7 @@
 #include "pico/multicore.h"
 #include "pico/util/queue.h"
 #include "config.h"
+#include "usb.h"
 
 #define INPUT_CHANNELS    4
 #define OUTPUT_CHANNELS   2
@@ -59,8 +60,8 @@ void audio_loop() {
     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] / 32768.0f * (get_config().speaker_volume - 1.0f);
-        audio_buf[audio_buf_pos++] = raw[i * INPUT_CHANNELS + 1] / 32768.0f * (get_config().speaker_volume - 1.0f);
+        audio_buf[audio_buf_pos++] = raw[i * INPUT_CHANNELS] / 32768.0f * (get_config().speaker_volume - 1.0f) * !mute[0];
+        audio_buf[audio_buf_pos++] = raw[i * INPUT_CHANNELS + 1] / 32768.0f * (get_config().speaker_volume - 1.0f) * !mute[0];
         if (audio_buf_pos == 512 * 2) {
             static audio_raw_element element{};
             memcpy(element.data,audio_buf,512 * 2 * 4);

src/config.cpp

@@ -122,3 +122,8 @@ void set_config(const uint8_t *new_config, const uint16_t len) {
         cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, true);
     }
 }
+
+void set_config(const Config_body &new_config) {
+    config.body = new_config;
+    config_valid();
+}

src/config.h

@@ -32,5 +32,6 @@ bool config_save();
 const Config_body& get_config();
 void set_config(const uint8_t *new_config, const uint16_t len);
 void config_valid();
+void set_config(const Config_body &new_config);
 
 #endif //DS5_BRIDGE_CONFIG_H

src/usb.cpp

@@ -4,6 +4,7 @@
 
 #include "tusb.h"
 #include "bsp/board_api.h"
+#include "config.h"
 
 uint8_t mute[2]; // 0: SPEAKER(0x02) 1: MIC(0x05)
 float volume[2] = {1.0f}; // 0: SPEAKER(0x02) 1: MIC(0x05)
@@ -66,6 +67,11 @@ static bool audio10_set_req_entity(tusb_control_request_t const *p_request, uint
                         TU_VERIFY(p_request->wLength == 2);
 
                         volume[index] = static_cast<float>(tu_unaligned_read16(pBuff)) / 256;
+                        if (entityID == UAC1_ENTITY_SPK_FEATURE_UNIT) {
+                            auto config = get_config();
+                            config.speaker_volume = volume[index];
+                            set_config(config);
+                        }
 
                         TU_LOG2("    Set Volume: %d dB of entity: %u\r\n", volume[index], entityID);
                         return true;
@@ -103,8 +109,10 @@ static bool audio10_get_req_entity(uint8_t rhport, tusb_control_request_t const
                 switch (p_request->bRequest) {
                     case AUDIO10_CS_REQ_GET_CUR:
                         TU_LOG2("    Get Volume of entity: %u\r\n", entityID); {
-                            int16_t vol = volume[index];
-                            vol = vol * 256; // convert to 1/256 dB units
+                            if (entityID == UAC1_ENTITY_SPK_FEATURE_UNIT) {
+                                volume[index] = get_config().speaker_volume;
+                            }
+                            int16_t vol = volume[index] * 256; // convert to 1/256 dB units
                             return tud_audio_buffer_and_schedule_control_xfer(rhport, p_request, &vol, sizeof(vol));
                         }