Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/audaspace/plugins/sdl/SDLDevice.cpp

@@ -0,0 +1,169 @@
+/*******************************************************************************
+ * Copyright 2009-2016 Jörg Müller
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ******************************************************************************/
+
+#include "SDLDevice.h"
+#include "devices/DeviceManager.h"
+#include "devices/IDeviceFactory.h"
+#include "Exception.h"
+#include "IReader.h"
+
+AUD_NAMESPACE_BEGIN
+
+void SDLDevice::SDL_mix(void* userdata, SDL_AudioStream* stream, int additional_amount, int /*total_amount*/)
+{
+	SDLDevice* device = (SDLDevice*)userdata;
+
+	if(!device->m_playback)
+		return;
+
+	const int sample_size = AUD_DEVICE_SAMPLE_SIZE(device->m_specs);
+	const int num_samples = additional_amount / sample_size;
+	data_t* buffer = (data_t*)SDL_stack_alloc(Uint8, additional_amount);
+	device->mix(buffer, num_samples);
+	SDL_PutAudioStreamData(stream, buffer, additional_amount);
+	SDL_stack_free(buffer);
+}
+
+void SDLDevice::playing(bool playing)
+{
+	if(playing)
+		SDL_ResumeAudioStreamDevice(m_stream);
+	else
+		SDL_PauseAudioStreamDevice(m_stream);
+
+	m_playback = playing;
+}
+
+SDL_AudioSpec SDLDevice::sdl_audiospec_from_device_specs(const DeviceSpecs &specs)
+{
+	SDL_AudioSpec audiospec;
+
+	switch(specs.format)
+	{
+	case FORMAT_U8:
+		audiospec.format = SDL_AUDIO_U8;
+		break;
+	case FORMAT_S16:
+		audiospec.format = SDL_AUDIO_S16;
+		break;
+	case FORMAT_S32:
+		audiospec.format = SDL_AUDIO_S32;
+		break;
+	case FORMAT_FLOAT32:
+		audiospec.format = SDL_AUDIO_F32;
+		break;
+	default:
+		audiospec.format = SDL_AUDIO_F32;
+		break;
+	}
+
+	audiospec.channels = specs.channels;
+	audiospec.freq = specs.rate;
+
+	return audiospec;
+}
+
+SDLDevice::SDLDevice(DeviceSpecs specs, int buffersize) :
+	m_playback(false),
+	m_stream(nullptr)
+{
+	if(specs.channels == CHANNELS_INVALID)
+		specs.channels = CHANNELS_STEREO;
+	if(specs.format == FORMAT_INVALID)
+		specs.format = FORMAT_FLOAT32;
+	if(specs.rate == static_cast<SampleRate>(RATE_INVALID))
+		specs.rate = RATE_48000;
+
+	m_specs = specs;
+
+	if(!SDL_InitSubSystem(SDL_INIT_AUDIO))
+		AUD_THROW(DeviceException, "Failed to initialize SDL Audio subsystem.");
+
+	const SDL_AudioSpec audiospec = sdl_audiospec_from_device_specs(specs);
+	m_stream = SDL_OpenAudioDeviceStream(SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, &audiospec, SDLDevice::SDL_mix, this);
+
+	if(!m_stream)
+		AUD_THROW(DeviceException, "The audio device couldn't be opened with SDL.");
+
+	create();
+}
+
+SDLDevice::~SDLDevice()
+{
+	destroy();
+
+	SDL_DestroyAudioStream(m_stream);
+	SDL_QuitSubSystem(SDL_INIT_AUDIO);
+}
+
+class SDLDeviceFactory : public IDeviceFactory
+{
+private:
+	DeviceSpecs m_specs;
+	int m_buffersize;
+
+public:
+	SDLDeviceFactory() :
+		m_buffersize(AUD_DEFAULT_BUFFER_SIZE)
+	{
+		m_specs.format = FORMAT_S16;
+		m_specs.channels = CHANNELS_STEREO;
+		m_specs.rate = RATE_48000;
+	}
+
+	virtual std::shared_ptr<IDevice> openDevice()
+	{
+		return std::shared_ptr<IDevice>(new SDLDevice(m_specs, m_buffersize));
+	}
+
+	virtual int getPriority()
+	{
+		return 1 << 5;
+	}
+
+	virtual void setSpecs(DeviceSpecs specs)
+	{
+		m_specs = specs;
+	}
+
+	virtual void setBufferSize(int buffersize)
+	{
+		m_buffersize = buffersize;
+	}
+
+	virtual void setName(const std::string &name)
+	{
+	}
+};
+
+void SDLDevice::registerPlugin()
+{
+	DeviceManager::registerDevice("SDL", std::shared_ptr<IDeviceFactory>(new SDLDeviceFactory));
+}
+
+#ifdef SDL_PLUGIN
+extern "C" AUD_PLUGIN_API void registerPlugin()
+{
+	SDLDevice::registerPlugin();
+}
+
+extern "C" AUD_PLUGIN_API const char* getName()
+{
+	return "SDL";
+}
+#endif
+
+AUD_NAMESPACE_END