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Fixes to SDL audio renderer and autodetection support

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This commit is contained in:
Cameron Gutman
2018-09-13 07:46:01 -07:00
parent 12496e4432
commit 64bc189010
7 changed files with 59 additions and 88 deletions
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app/streaming/audio/renderers/sdlaud.cpp
+28 -72
View File
@@ -3,6 +3,7 @@
#include <Limelight.h>
#include <SDL.h>
#include <QAudioDeviceInfo>
#include <QtGlobal>
#define MIN_QUEUED_FRAMES 2
@@ -10,69 +11,31 @@
#define STOP_THE_WORLD_LIMIT 20
#define DROP_RATIO_DENOM 32
// Detecting this with SDL is quite problematic, so we'll use Qt's
// multimedia framework to do so. It appears to be actually
// accurate on Linux and macOS, unlike using SDL and relying
// on a channel change in the format received.
int SdlAudioRenderer::detectAudioConfiguration()
{
SDL_AudioSpec want, have;
SDL_AudioDeviceID dev;
int ret;
if (SDL_InitSubSystem(SDL_INIT_AUDIO) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_InitSubSystem(SDL_INIT_AUDIO) failed: %s",
SDL_GetError());
return AUDIO_CONFIGURATION_STEREO;
}
SDL_zero(want);
want.freq = 48000;
want.format = AUDIO_S16;
want.channels = 6;
want.samples = 1024;
// Try to open for 5.1 surround sound, but allow SDL to tell us that's
// not available.
dev = SDL_OpenAudioDevice(NULL, 0, &want, &have, SDL_AUDIO_ALLOW_CHANNELS_CHANGE);
if (dev == 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Failed to open audio device");
// We'll probably have issues during audio stream init, but we'll
// try anyway
ret = AUDIO_CONFIGURATION_STEREO;
goto Exit;
}
SDL_CloseAudioDevice(dev);
int preferredChannelCount = QAudioDeviceInfo::defaultOutputDevice().preferredFormat().channelCount();
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Audio device has %d channels", have.channels);
"Audio output device prefers %d channel configuration",
preferredChannelCount);
if (have.channels > 2) {
// We don't support quadraphonic or 7.1 surround, but SDL
// should be able to downmix or upmix better from 5.1 than
// from stereo, so use 5.1 in non-stereo cases.
ret = AUDIO_CONFIGURATION_51_SURROUND;
// We can better downmix 5.1 to quad than we can upmix stereo
if (preferredChannelCount > 2) {
return AUDIO_CONFIGURATION_51_SURROUND;
}
else {
ret = AUDIO_CONFIGURATION_STEREO;
return AUDIO_CONFIGURATION_STEREO;
}
Exit:
SDL_QuitSubSystem(SDL_INIT_AUDIO);
return ret;
}
bool SdlAudioRenderer::testAudio(int audioConfiguration)
{
SDL_AudioSpec want, have;
SDL_AudioDeviceID dev;
bool ret;
if (SDL_InitSubSystem(SDL_INIT_AUDIO) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Audio test - SDL_InitSubSystem(SDL_INIT_AUDIO) failed: %s",
SDL_GetError());
return false;
}
SDL_zero(want);
want.freq = 48000;
@@ -88,8 +51,7 @@ bool SdlAudioRenderer::testAudio(int audioConfiguration)
break;
default:
SDL_assert(false);
ret = false;
goto Exit;
return false;
}
// Test audio device for functionality
@@ -98,8 +60,7 @@ bool SdlAudioRenderer::testAudio(int audioConfiguration)
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Audio test - Failed to open audio device: %s",
SDL_GetError());
ret = false;
goto Exit;
return false;
}
SDL_CloseAudioDevice(dev);
@@ -107,12 +68,7 @@ bool SdlAudioRenderer::testAudio(int audioConfiguration)
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Audio test - Successful with %d channels",
want.channels);
ret = true;
Exit:
SDL_QuitSubSystem(SDL_INIT_AUDIO);
return ret;
return true;
}
SdlAudioRenderer::SdlAudioRenderer()
@@ -123,20 +79,18 @@ SdlAudioRenderer::SdlAudioRenderer()
m_SampleIndex(0),
m_BaselinePendingData(0)
{
}
bool SdlAudioRenderer::prepareForPlayback(const OPUS_MULTISTREAM_CONFIGURATION* opusConfig)
{
SDL_AudioSpec want, have;
SDL_assert(!SDL_WasInit(SDL_INIT_AUDIO));
if (SDL_InitSubSystem(SDL_INIT_AUDIO) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_InitSubSystem(SDL_INIT_AUDIO) failed: %s",
SDL_GetError());
return -1;
SDL_assert(SDL_WasInit(SDL_INIT_AUDIO));
}
}
bool SdlAudioRenderer::prepareForPlayback(const OPUS_MULTISTREAM_CONFIGURATION* opusConfig)
{
SDL_AudioSpec want, have;
SDL_zero(want);
want.freq = opusConfig->sampleRate;
@@ -155,7 +109,7 @@ bool SdlAudioRenderer::prepareForPlayback(const OPUS_MULTISTREAM_CONFIGURATION*
"Failed to open audio device: %s",
SDL_GetError());
SDL_QuitSubSystem(SDL_INIT_AUDIO);
return -1;
return false;
}
// SDL counts pending samples in the queued
@@ -182,14 +136,16 @@ bool SdlAudioRenderer::prepareForPlayback(const OPUS_MULTISTREAM_CONFIGURATION*
// Start playback
SDL_PauseAudioDevice(m_AudioDevice, 0);
return 0;
return true;
}
SdlAudioRenderer::~SdlAudioRenderer()
{
// Stop playback
SDL_PauseAudioDevice(m_AudioDevice, 1);
SDL_CloseAudioDevice(m_AudioDevice);
if (m_AudioDevice != 0) {
// Stop playback
SDL_PauseAudioDevice(m_AudioDevice, 1);
SDL_CloseAudioDevice(m_AudioDevice);
}
SDL_QuitSubSystem(SDL_INIT_AUDIO);
SDL_assert(!SDL_WasInit(SDL_INIT_AUDIO));