[media] Add a switch to enable resetting audio decoder (#3020)

1. Make resetting audio decoder configurable from web app. 2. This can be enabled by using MIME attribute "enableresetaudiodecoder=true". b/327229953 (cherry picked from commit 3ef72cd)
youtube · Apr 22, 2024 · af0eded · af0eded
1 parent 7664e9a
commit af0eded
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Showing 3 changed files with 50 additions and 4 deletions.
diff --git a/starboard/android/shared/player_components_factory.h b/starboard/android/shared/player_components_factory.h
@@ -75,6 +75,11 @@ constexpr bool kForceResetSurfaceUnderTunnelMode = true;
 // during Seek().
 constexpr bool kForceFlushDecoderDuringReset = false;
 
+// By default, Cobalt teardowns AudioDecoder during Reset().
+// Set the following variable to true to force it reset audio decoder
+// during Reset(). This should be enabled with kForceFlushDecoderDuringReset.
+constexpr bool kForceResetAudioDecoder = false;
+
 // This class allows us to force int16 sample type when tunnel mode is enabled.
 class AudioRendererSinkAndroid : public ::starboard::shared::starboard::player::
                                      filter::AudioRendererSinkImpl {
@@ -382,6 +387,22 @@ class PlayerComponentsFactory : public starboard::shared::starboard::player::
                    << tunnel_mode_audio_session_id << '.';
     }
 
+    bool enable_reset_audio_decoder =
+        video_mime_type.GetParamBoolValue("enableresetaudiodecoder", false);
+    SB_LOG(INFO) << "Reset AudioDecoder during Reset(): "
+                 << (enable_reset_audio_decoder ? "enabled. " : "disabled. ")
+                 << "Video mime parameter \"enableresetaudiodecoder\" value: "
+                 << video_mime_type.GetParamStringValue(
+                        "enableresetaudiodecoder", "<not provided>")
+                 << ".";
+
+    if (kForceResetAudioDecoder && !enable_reset_audio_decoder) {
+      SB_LOG(INFO)
+          << "`kForceResetAudioDecoder` is set to true, force resetting"
+          << " audio decoder during Reset().";
+      enable_reset_audio_decoder = true;
+    }
+
     bool enable_flush_during_seek =
         video_mime_type.GetParamBoolValue("enableflushduringseek", false);
     SB_LOG(INFO) << "Flush MediaCodec during Reset(): "
@@ -431,7 +452,8 @@ class PlayerComponentsFactory : public starboard::shared::starboard::player::
 
       audio_decoder->reset(new AdaptiveAudioDecoder(
           creation_parameters.audio_stream_info(),
-          creation_parameters.drm_system(), decoder_creator));
+          creation_parameters.drm_system(), decoder_creator,
+          enable_reset_audio_decoder));
 
       if (tunnel_mode_audio_session_id != -1) {
         *audio_renderer_sink = TryToCreateTunnelModeAudioRendererSink(

diff --git a/starboard/shared/starboard/player/filter/adaptive_audio_decoder_internal.cc b/starboard/shared/starboard/player/filter/adaptive_audio_decoder_internal.cc
@@ -43,6 +43,19 @@ AdaptiveAudioDecoder::AdaptiveAudioDecoder(
   SB_DCHECK(audio_stream_info.codec != kSbMediaAudioCodecNone);
 }
 
+AdaptiveAudioDecoder::AdaptiveAudioDecoder(
+    const media::AudioStreamInfo& audio_stream_info,
+    SbDrmSystem drm_system,
+    const AudioDecoderCreator& audio_decoder_creator,
+    bool enable_reset_audio_decoder,
+    const OutputFormatAdjustmentCallback& output_adjustment_callback)
+    : AdaptiveAudioDecoder(audio_stream_info,
+                           drm_system,
+                           audio_decoder_creator,
+                           output_adjustment_callback) {
+  enable_reset_audio_decoder_ = enable_reset_audio_decoder;
+}
+
 AdaptiveAudioDecoder::~AdaptiveAudioDecoder() {
   SB_DCHECK(BelongsToCurrentThread());
 
@@ -154,9 +167,13 @@ void AdaptiveAudioDecoder::Reset() {
   SB_DCHECK(BelongsToCurrentThread());
 
   if (audio_decoder_) {
-    audio_decoder_->Reset();
-    resampler_.reset();
-    channel_mixer_.reset();
+    if (enable_reset_audio_decoder_) {
+      audio_decoder_->Reset();
+      resampler_.reset();
+      channel_mixer_.reset();
+    } else {
+      TeardownAudioDecoder();
+    }
   }
   ResetInternal();
 }

diff --git a/starboard/shared/starboard/player/filter/adaptive_audio_decoder_internal.h b/starboard/shared/starboard/player/filter/adaptive_audio_decoder_internal.h
@@ -52,6 +52,12 @@ class AdaptiveAudioDecoder : public AudioDecoder, private JobQueue::JobOwner {
                        const AudioDecoderCreator& audio_decoder_creator,
                        const OutputFormatAdjustmentCallback&
                            output_adjustment_callback = nullptr);
+  AdaptiveAudioDecoder(const media::AudioStreamInfo& audio_stream_info,
+                       SbDrmSystem drm_system,
+                       const AudioDecoderCreator& audio_decoder_creator,
+                       bool enable_reset_audio_decoder,
+                       const OutputFormatAdjustmentCallback&
+                           output_adjustment_callback = nullptr);
   ~AdaptiveAudioDecoder() override;
 
   void Initialize(const OutputCB& output_cb, const ErrorCB& error_cb) override;
@@ -91,6 +97,7 @@ class AdaptiveAudioDecoder : public AudioDecoder, private JobQueue::JobOwner {
   bool first_output_received_ = false;
   bool output_format_checked_ = false;
   bool first_input_written_ = false;
+  bool enable_reset_audio_decoder_ = false;
 };
 
 }  // namespace filter