adds a way to auto selects audio device

stakira · Aug 4, 2024 · 35d2c3f · 35d2c3f
1 parent 1b6e333
commit 35d2c3f
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Showing 3 changed files with 68 additions and 10 deletions.
diff --git a/cpp/worldline/audio_output.cc b/cpp/worldline/audio_output.cc
@@ -133,11 +133,46 @@ DLL_API ou_audio_context_t* ou_init_audio_device(
   return result;
 }
 
+DLL_API ou_audio_context_t* ou_init_audio_device_auto(
+    ou_audio_data_callback_t callback) {
+  ou_audio_context_t* result = new ou_audio_context_t();
+  if (result == NULL) {
+    return NULL;
+  }
+
+  ma_device_config config = ma_device_config_init(ma_device_type_playback);
+  config.playback.format = ma_format_f32;
+  config.playback.channels = 2;
+  config.sampleRate = 44100;
+  g_data_callback = callback;
+  config.dataCallback = data_callback;
+  config.pUserData = result;
+
+  if (ma_device_init(NULL, &config, &result->device) != MA_SUCCESS) {
+    delete result;
+    return NULL;
+  }
+
+  return result;
+}
+
+DLL_API const char* ou_get_audio_device_api(ou_audio_context_t* context) {
+  ma_backend backend = context->device.pContext->backend;
+  return ma_get_backend_name(backend);
+}
+
+DLL_API const char* ou_get_audio_device_name(ou_audio_context_t* context) {
+  return context->device.playback.name;
+}
+
 DLL_API int ou_free_audio_device(ou_audio_context_t* context) {
+  bool release_context = !context->device.isOwnerOfContext;
   ma_device_uninit(&context->device);
-  ma_result result = ma_context_uninit(&context->context);
-  if (result != MA_SUCCESS) {
-    return result;
+  if (release_context) {
+    ma_result result = ma_context_uninit(&context->context);
+    if (result != MA_SUCCESS) {
+      return result;
+    }
   }
   delete context;
   return 0;

diff --git a/cpp/worldline/audio_output.h b/cpp/worldline/audio_output.h
@@ -1,7 +1,7 @@
 #ifndef WORLDLINE_AUDIO_OUTPUT_H
 #define WORLDLINE_AUDIO_OUTPUT_H
 
-#include <stdint.h>
+#include <cstdint>
 
 #include "miniaudio.h"
 
@@ -15,17 +15,17 @@
 extern "C" {
 #endif
 
-typedef struct {
+struct ou_audio_device_info_t {
   char* name;
   uint64_t id;
   char* api;
   uint32_t api_id;
-} ou_audio_device_info_t;
+};
 
-typedef struct {
+struct ou_audio_context_t {
   ma_context context;
   ma_device device;
-} ou_audio_context_t;
+};
 
 typedef void (*ou_audio_data_callback_t)(float* buffer, uint32_t channels,
                                          uint32_t frame_count);
@@ -39,6 +39,15 @@ DLL_API void ou_free_audio_device_infos(ou_audio_device_info_t* device_infos,
 DLL_API ou_audio_context_t* ou_init_audio_device(
     uint32_t api_id, uint64_t id, ou_audio_data_callback_t callback);
 
+DLL_API ou_audio_context_t* ou_init_audio_device_auto(
+    ou_audio_data_callback_t callback);
+
+DLL_API const char* ou_get_audio_device_api(ou_audio_context_t* context);
+
+// On windows returns string of local code page, except for WASAPI which returns UTF-8.
+// On other platforms returns UTF-8.
+DLL_API const char* ou_get_audio_device_name(ou_audio_context_t* context);
+
 DLL_API int ou_free_audio_device(ou_audio_context_t* context);
 
 DLL_API int ou_audio_device_start(ou_audio_context_t* context);

diff --git a/cpp/worldline/audio_output_test.cc b/cpp/worldline/audio_output_test.cc
@@ -33,12 +33,26 @@ TEST(MiniAudioTest, Playback) {
               << " API: " << device_infos[i].api
               << " API Id: " << device_infos[i].api_id << " Index: " << i
               << " ID: " << absl::Hex(device_infos[i].id);
-    api_id = device_infos[i].api_id;
-    id = device_infos[i].id;
+    if (i == 0) {
+      api_id = device_infos[i].api_id;
+      id = device_infos[i].id;
+    }
   }
   ou_free_audio_device_infos(device_infos, count);
 
   ou_audio_context_t* context = ou_init_audio_device(api_id, id, &white_noise);
+  LOG(INFO) << "Device API: " << ou_get_audio_device_api(context);
+  LOG(INFO) << "Device Name: " << ou_get_audio_device_name(context);
+  ou_audio_device_start(context);
+  absl::SleepFor(absl::Seconds(1));
+  ou_audio_device_stop(context);
+  ou_free_audio_device(context);
+
+  absl::SleepFor(absl::Seconds(1));
+
+  context = ou_init_audio_device_auto(&white_noise);
+  LOG(INFO) << "Auto Device API: " << ou_get_audio_device_api(context);
+  LOG(INFO) << "Auto Device Name: " << ou_get_audio_device_name(context);
   ou_audio_device_start(context);
   absl::SleepFor(absl::Seconds(1));
   ou_audio_device_stop(context);