From 141258c366e124f731a99d219ec8f4014e4b4f07 Mon Sep 17 00:00:00 2001
From: "Unknown W. Brackets" <checkins@unknownbrackets.org>
Date: Sun, 15 Sep 2019 12:42:49 -0700
Subject: [PATCH] SDL: Use SDL2 audio API for output.

---
 Qt/QtMain.cpp   | 20 +++++++++++++-------
 SDL/SDLMain.cpp | 16 ++++++++++------
 2 files changed, 23 insertions(+), 13 deletions(-)

diff --git a/Qt/QtMain.cpp b/Qt/QtMain.cpp
index 3c9bdb102d..0e961d5ff8 100644
--- a/Qt/QtMain.cpp
+++ b/Qt/QtMain.cpp
@@ -29,7 +29,9 @@
 #ifdef SDL
 #include "SDL/SDLJoystick.h"
 #include "SDL_audio.h"
+#define MainAudioDeviceID SDL_AudioDeviceID
 #endif
+#define MainAudioDeviceID int
 #include "QtMain.h"
 #include "gfx_es2/gpu_features.h"
 #include "i18n/i18n.h"
@@ -168,7 +170,7 @@ float CalculateDPIScale()
 #endif
 }
 
-static int mainInternal(QApplication &a) {
+static int mainInternal(QApplication &a, MainAudioDeviceID &audioDev) {
 #ifdef MOBILE_DEVICE
 	emugl = new MainUI();
 	emugl->resize(pixel_xres, pixel_yres);
@@ -194,7 +196,8 @@ static int mainInternal(QApplication &a) {
 	fmt.callback = &mixaudio;
 	fmt.userdata = (void *)0;
 
-	if (SDL_OpenAudio(&fmt, &ret_fmt) < 0) {
+	audioDev = SDL_OpenAudioDevice(nullptr, 0, &fmt, &ret_fmt, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
+	if (audioDev <= 0) {
 		ELOG("Failed to open audio: %s", SDL_GetError());
 	} else {
 		if (ret_fmt.samples != fmt.samples) // Notify, but still use it
@@ -205,10 +208,10 @@ static int mainInternal(QApplication &a) {
 			ELOG("Output audio format: %d (requested: %d)", ret_fmt.format, fmt.format);
 			ELOG("Output audio channels: %d (requested: %d)", ret_fmt.channels, fmt.channels);
 			ELOG("Provided output format does not match requirement, turning audio off");
-			SDL_CloseAudio();
+			SDL_CloseAudioDevice(audioDev);
 		}
+		SDL_PauseAudioDevice(audioDev, 0);
 	}
-	SDL_PauseAudio(0);
 #else
 	QScopedPointer<MainAudio> audio(new MainAudio());
 	audio->run();
@@ -608,12 +611,15 @@ int main(int argc, char *argv[])
 	// TODO: Support other backends than GL, like Vulkan, in the Qt backend.
 	g_Config.iGPUBackend = (int)GPUBackend::OPENGL;
 
-	int ret = mainInternal(a);
+	MainAudioDeviceID audioDev = 0;
+	int ret = mainInternal(a, audioDev);
 	ILOG("Left mainInternal here.");
 
 #ifdef SDL
-	SDL_PauseAudio(1);
-	SDL_CloseAudio();
+	if (audioDev > 0) {
+		SDL_PauseAudioDevice(audioDev, 1);
+		SDL_CloseAudioDevice(audioDev);
+	}
 #endif
 	NativeShutdown();
 	glslang::FinalizeProcess();
diff --git a/SDL/SDLMain.cpp b/SDL/SDLMain.cpp
index 28c3548201..3a3246e686 100644
--- a/SDL/SDLMain.cpp
+++ b/SDL/SDLMain.cpp
@@ -582,7 +582,8 @@ int main(int argc, char *argv[]) {
 	fmt.callback = &mixaudio;
 	fmt.userdata = (void *)0;
 
-	if (SDL_OpenAudio(&fmt, &ret_fmt) < 0) {
+	SDL_AudioDeviceID audioDev = SDL_OpenAudioDevice(nullptr, 0, &fmt, &ret_fmt, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
+	if (audioDev <= 0) {
 		ELOG("Failed to open audio: %s", SDL_GetError());
 	} else {
 		if (ret_fmt.samples != fmt.samples) // Notify, but still use it
@@ -593,12 +594,13 @@ int main(int argc, char *argv[]) {
 			ELOG("Output audio format: %d (requested: %d)", ret_fmt.format, fmt.format);
 			ELOG("Output audio channels: %d (requested: %d)", ret_fmt.channels, fmt.channels);
 			ELOG("Provided output format does not match requirement, turning audio off");
-			SDL_CloseAudio();
+			SDL_CloseAudioDevice(audioDev);
 		}
+
+		// Audio must be unpaused _after_ NativeInit()
+		SDL_PauseAudioDevice(audioDev, 0);
 	}
 
-	// Audio must be unpaused _after_ NativeInit()
-	SDL_PauseAudio(0);
 	if (joystick_enabled) {
 		joystick = new SDLJoystick();
 	} else {
@@ -927,8 +929,10 @@ int main(int argc, char *argv[]) {
 	graphicsContext->ShutdownFromRenderThread();
 	delete graphicsContext;
 
-	SDL_PauseAudio(1);
-	SDL_CloseAudio();
+	if (audioDev > 0) {
+		SDL_PauseAudioDevice(audioDev, 1);
+		SDL_CloseAudioDevice(audioDev);
+	}
 	SDL_Quit();
 #if PPSSPP_PLATFORM(RPI)
 	bcm_host_deinit();