Refactor audio rendering into a separate class

2026-02-16 02:30:52 +00:00 · 2018-09-13 06:23:06 -07:00
parent 9e2fd67487
commit 12496e4432
9 changed files with 244 additions and 131 deletions
--- a/app/streaming/audio/audio.cpp
+++ b/app/streaming/audio/audio.cpp
@@ -0,0 +1,111 @@
+#include "../session.hpp"
+#include "renderers/renderer.h"
+#include "renderers/sdl.h"
+
+#include <Limelight.h>
+
+IAudioRenderer* Session::createAudioRenderer()
+{
+    return new SdlAudioRenderer();
+}
+
+bool Session::testAudio(int audioConfiguration)
+{
+    IAudioRenderer* audioRenderer;
+
+    audioRenderer = createAudioRenderer();
+    if (audioRenderer == nullptr) {
+        return false;
+    }
+
+    bool ret = audioRenderer->testAudio(audioConfiguration);
+
+    delete audioRenderer;
+
+    return ret;
+}
+
+int Session::detectAudioConfiguration()
+{
+    IAudioRenderer* audioRenderer;
+
+    audioRenderer = createAudioRenderer();
+    if (audioRenderer == nullptr) {
+        // Hope for the best
+        return AUDIO_CONFIGURATION_STEREO;
+    }
+
+    int audioConfig = audioRenderer->detectAudioConfiguration();
+
+    delete audioRenderer;
+
+    return audioConfig;
+}
+
+int Session::arInit(int /* audioConfiguration */,
+                    const POPUS_MULTISTREAM_CONFIGURATION opusConfig,
+                    void* /* arContext */, int /* arFlags */)
+{
+    int error;
+
+    SDL_memcpy(&s_ActiveSession->m_AudioConfig, opusConfig, sizeof(*opusConfig));
+
+    s_ActiveSession->m_OpusDecoder =
+            opus_multistream_decoder_create(opusConfig->sampleRate,
+                                            opusConfig->channelCount,
+                                            opusConfig->streams,
+                                            opusConfig->coupledStreams,
+                                            opusConfig->mapping,
+                                            &error);
+    if (s_ActiveSession->m_OpusDecoder == NULL) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
+                     "Failed to create decoder: %d",
+                     error);
+        return -1;
+    }
+
+    s_ActiveSession->m_AudioRenderer = s_ActiveSession->createAudioRenderer();
+    if (s_ActiveSession->m_AudioRenderer == nullptr) {
+        opus_multistream_decoder_destroy(s_ActiveSession->m_OpusDecoder);
+        return -2;
+    }
+
+    s_ActiveSession->m_AudioRenderer->prepareForPlayback(opusConfig);
+    if (s_ActiveSession->m_AudioRenderer == nullptr) {
+        delete s_ActiveSession->m_AudioRenderer;
+        opus_multistream_decoder_destroy(s_ActiveSession->m_OpusDecoder);
+        return -3;
+    }
+
+    SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
+                "Audio stream has %d channels",
+                opusConfig->channelCount);
+
+    return 0;
+}
+
+void Session::arCleanup()
+{
+    delete s_ActiveSession->m_AudioRenderer;
+
+    opus_multistream_decoder_destroy(s_ActiveSession->m_OpusDecoder);
+    s_ActiveSession->m_OpusDecoder = nullptr;
+}
+
+void Session::arDecodeAndPlaySample(char* sampleData, int sampleLength)
+{
+    int samplesDecoded;
+
+    samplesDecoded = opus_multistream_decode(s_ActiveSession->m_OpusDecoder,
+                                             (unsigned char*)sampleData,
+                                             sampleLength,
+                                             s_ActiveSession->m_OpusDecodeBuffer,
+                                             SAMPLES_PER_FRAME,
+                                             0);
+    if (samplesDecoded > 0) {
+        s_ActiveSession->m_AudioRenderer->submitAudio(s_ActiveSession->m_OpusDecodeBuffer,
+                                                      static_cast<int>(sizeof(short) *
+                                                      samplesDecoded *
+                                                      s_ActiveSession->m_AudioConfig.channelCount));
+    }
+}