Enable audio transmission

test/audio_capture/output_audio.cpp

@@ -0,0 +1,53 @@
+#include <SDL2/SDL.h>
+
+int main(int argc, char *argv[]) {
+  int ret;
+  SDL_AudioSpec wanted_spec, obtained_spec;
+
+  // Initialize SDL
+  if (SDL_Init(SDL_INIT_AUDIO) < 0) {
+    SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to initialize SDL: %s",
+                 SDL_GetError());
+    return -1;
+  }
+
+  // Set audio format
+  wanted_spec.freq = 44100;  // Sample rate
+  wanted_spec.format =
+      AUDIO_F32SYS;          // Sample format (32-bit float, system byte order)
+  wanted_spec.channels = 2;  // Number of channels (stereo)
+  wanted_spec.samples = 1024;   // Buffer size (in samples)
+  wanted_spec.callback = NULL;  // Audio callback function (not used here)
+
+  // Open audio device
+  ret = SDL_OpenAudio(&wanted_spec, &obtained_spec);
+  if (ret < 0) {
+    SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
+                 "Failed to open audio device: %s", SDL_GetError());
+    return -1;
+  }
+
+  // Start playing audio
+  SDL_PauseAudio(0);
+
+  // Write PCM data to audio buffer
+  float *pcm_data = ...;    // PCM data buffer (float, interleaved)
+  int pcm_data_size = ...;  // Size of PCM data buffer (in bytes)
+  int bytes_written = SDL_QueueAudio(0, pcm_data, pcm_data_size);
+
+  // Wait until audio buffer is empty
+  while (SDL_GetQueuedAudioSize(0) > 0) {
+    SDL_Delay(100);
+  }
+
+  // Stop playing audio
+  SDL_PauseAudio(1);
+
+  // Close audio device
+  SDL_CloseAudio();
+
+  // Quit SDL
+  SDL_Quit();
+
+  return 0;
+}