Fix calling of AudioOutputStream::AudioSourceCallback API

Before this change calling of AudioOutputStream::AudioSourceCallback
method without stream position ended up in an empty implementation.

BUG=XWALK-6703

Author: Mikhail Pozdnyakov

media/audio/BUILD.gn

@@ -64,7 +64,6 @@ source_set("audio") {
     "audio_input_device.h",
     "audio_input_ipc.cc",
     "audio_input_ipc.h",
-    "audio_io.cc",
     "audio_io.h",
     "audio_manager.cc",
     "audio_manager.h",

media/audio/audio_io.cc

@@ -68,15 +68,12 @@ class MEDIA_EXPORT AudioOutputStream {
     // the number of frames it filled.  |total_bytes_delay| contains current
     // number of bytes of delay buffered by the AudioOutputStream.
     // |frames_skipped| contains the number of frames skipped by the consumer.
-    virtual int OnMoreData(AudioBus* dest,
-                           uint32_t total_bytes_delay,
-                           uint32_t frames_skipped);
-    // An alternate version which provides also device stream position,
-    // by default it just invokes the above method.
+    // |device_position| if provided, contains position of currently audible
+    // signal.
     virtual int OnMoreData(AudioBus* dest,
                            uint32_t total_bytes_delay,
                            uint32_t frames_skipped,
-                           const StreamPosition& device_position);
+                           const StreamPosition& device_position = {0, 0}) = 0;
 
     // There was an error while playing a buffer. Audio source cannot be
     // destroyed yet. No direct action needed by the AudioStream, but it is

media/audio/audio_io.h

@@ -164,7 +164,7 @@ void AudioOutputController::DoPlay() {
     return;
 
   // Ask for first packet.
-  sync_reader_->UpdatePendingBytes(0, 0);
+  sync_reader_->UpdatePendingBytes(0, 0, {0, 0});
 
   state_ = kPlaying;
 
@@ -217,7 +217,8 @@ void AudioOutputController::DoPause() {
   // Let the renderer know we've stopped.  Necessary to let PPAPI clients know
   // audio has been shutdown.  TODO(dalecurtis): This stinks.  PPAPI should have
   // a better way to know when it should exit PPB_Audio_Shared::Run().
-  sync_reader_->UpdatePendingBytes(std::numeric_limits<uint32_t>::max(), 0);
+  sync_reader_->UpdatePendingBytes(std::numeric_limits<uint32_t>::max(), 0,
+                                   {0, 0});
 
   handler_->OnPaused();
 }

media/audio/audio_output_controller.cc

@@ -90,10 +90,9 @@ class MEDIA_EXPORT AudioOutputController
     // frames has been skipped by the renderer (typically the OS). The renderer
     // source can handle this appropriately depending on the type of source. An
     // ordinary file playout would ignore this.
-    virtual void UpdatePendingBytes(
-        uint32_t bytes,
-        uint32_t frames_skipped,
-        const StreamPosition& position = StreamPosition()) = 0;
+    virtual void UpdatePendingBytes(uint32_t bytes,
+                                    uint32_t frames_skipped,
+                                    const StreamPosition& position) = 0;
 
     // Attempts to completely fill |dest|, zeroing |dest| if the request can not
     // be fulfilled (due to timeout).

media/audio/audio_output_controller.h

@@ -79,7 +79,8 @@ OutputDevice* AudioOutputStreamSink::GetOutputDevice() {
 
 int AudioOutputStreamSink::OnMoreData(AudioBus* dest,
                                       uint32_t total_bytes_delay,
-                                      uint32_t frames_skipped) {
+                                      uint32_t frames_skipped,
+                                      const StreamPosition& position) {
   // Note: Runs on the audio thread created by the OS.
   base::AutoLock al(callback_lock_);
   if (!active_render_callback_)

media/audio/audio_output_stream_sink.cc

@@ -44,7 +44,8 @@ class MEDIA_EXPORT AudioOutputStreamSink
   // AudioSourceCallback implementation.
   int OnMoreData(AudioBus* dest,
                  uint32_t total_bytes_delay,
-                 uint32_t frames_skipped) override;
+                 uint32_t frames_skipped,
+                 const StreamPosition& position) override;
   void OnError(AudioOutputStream* stream) override;
 
  private:

media/audio/audio_output_stream_sink.h

@@ -113,7 +113,8 @@ SineWaveAudioSource::~SineWaveAudioSource() {
 // but it is efficient enough for our simple needs.
 int SineWaveAudioSource::OnMoreData(AudioBus* audio_bus,
                                     uint32_t total_bytes_delay,
-                                    uint32_t frames_skipped) {
+                                    uint32_t frames_skipped,
+                                    const StreamPosition& position) {
   base::AutoLock auto_lock(time_lock_);
   callbacks_++;
 
@@ -198,7 +199,8 @@ void FileSource::LoadWavFile(const base::FilePath& path_to_wav_file) {
 
 int FileSource::OnMoreData(AudioBus* audio_bus,
                            uint32_t total_bytes_delay,
-                           uint32_t frames_skipped) {
+                           uint32_t frames_skipped,
+                           const StreamPosition& position) {
   // Load the file if we haven't already. This load needs to happen on the
   // audio thread, otherwise we'll run on the UI thread on Mac for instance.
   // This will massively delay the first OnMoreData, but we'll catch up.
@@ -248,7 +250,8 @@ BeepingSource::~BeepingSource() {
 
 int BeepingSource::OnMoreData(AudioBus* audio_bus,
                               uint32_t total_bytes_delay,
-                              uint32_t frames_skipped) {
+                              uint32_t frames_skipped,
+                              const StreamPosition& position) {
   // Accumulate the time from the last beep.
   interval_from_last_beep_ += base::TimeTicks::Now() - last_callback_time_;
 

media/audio/simple_sources.cc

@@ -35,7 +35,8 @@ class MEDIA_EXPORT SineWaveAudioSource
   // Implementation of AudioSourceCallback.
   int OnMoreData(AudioBus* audio_bus,
                  uint32_t total_bytes_delay,
-                 uint32_t frames_skipped) override;
+                 uint32_t frames_skipped,
+                 const StreamPosition& position) override;
   void OnError(AudioOutputStream* stream) override;
 
   // The number of OnMoreData() and OnError() calls respectively.
@@ -62,7 +63,8 @@ class MEDIA_EXPORT FileSource : public AudioOutputStream::AudioSourceCallback,
   // Implementation of AudioSourceCallback.
   int OnMoreData(AudioBus* audio_bus,
                  uint32_t total_bytes_delay,
-                 uint32_t frames_skipped) override;
+                 uint32_t frames_skipped,
+                 const StreamPosition& position) override;
   void OnError(AudioOutputStream* stream) override;
 
  private:
@@ -95,7 +97,8 @@ class BeepingSource : public AudioOutputStream::AudioSourceCallback {
   // Implementation of AudioSourceCallback.
   int OnMoreData(AudioBus* audio_bus,
                  uint32_t total_bytes_delay,
-                 uint32_t frames_skipped) override;
+                 uint32_t frames_skipped,
+                 const StreamPosition& position) override;
   void OnError(AudioOutputStream* stream) override;
 
   static void BeepOnce();

media/audio/simple_sources.h

@@ -111,7 +111,8 @@ class AudioStreamHandler::AudioStreamContainer
   // Following methods could be called from *ANY* thread.
   int OnMoreData(AudioBus* dest,
                  uint32_t /* total_bytes_delay */,
-                 uint32_t /* frames_skipped */) override {
+                 uint32_t /* frames_skipped */,
+                 const StreamPosition& /* position */) override {
     base::AutoLock al(state_lock_);
     size_t bytes_written = 0;