moonlight-qt/app/streaming/audio/renderers/slaud.cpp

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2019-03-23 06:08:10 +00:00
#include "slaud.h"
#include <SDL.h>
SLAudioRenderer::SLAudioRenderer()
: m_AudioContext(nullptr),
m_AudioStream(nullptr)
{
SLAudio_SetLogFunction(SLAudioRenderer::slLogCallback, nullptr);
2019-03-23 06:08:10 +00:00
}
bool SLAudioRenderer::prepareForPlayback(const OPUS_MULTISTREAM_CONFIGURATION* opusConfig)
{
m_AudioContext = SLAudio_CreateContext();
if (m_AudioContext == nullptr) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SLAudio_CreateContext() failed");
return false;
}
m_AudioStream = SLAudio_CreateStream(m_AudioContext,
opusConfig->sampleRate,
opusConfig->channelCount,
SAMPLES_PER_FRAME * sizeof(short) * opusConfig->channelCount,
1);
if (m_AudioStream == nullptr) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SLAudio_CreateStream() failed");
return false;
}
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Using SLAudio renderer");
return true;
}
SLAudioRenderer::~SLAudioRenderer()
{
if (m_AudioStream != nullptr) {
SLAudio_FreeStream(m_AudioStream);
}
if (m_AudioContext != nullptr) {
SLAudio_FreeContext(m_AudioContext);
}
}
bool SLAudioRenderer::submitAudio(short* audioBuffer, int audioSize)
{
void* outputBuffer = SLAudio_BeginFrame(m_AudioStream);
if (outputBuffer != nullptr) {
memcpy(outputBuffer, audioBuffer, audioSize);
SLAudio_SubmitFrame(m_AudioStream);
}
return true;
}
void SLAudioRenderer::slLogCallback(void *context, ESLAudioLog logLevel, const char *message)
{
SDL_LogPriority priority;
switch (logLevel)
{
case k_ESLAudioLogError:
priority = SDL_LOG_PRIORITY_ERROR;
break;
case k_ESLAudioLogWarning:
priority = SDL_LOG_PRIORITY_WARN;
break;
case k_ESLAudioLogInfo:
priority = SDL_LOG_PRIORITY_INFO;
break;
default:
case k_ESLAudioLogDebug:
priority = SDL_LOG_PRIORITY_DEBUG;
break;
}
SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION,
priority,
"SLAudio: %s",
message);
}