audout: Implement and fix some calls (#1725)

* audout: Implement GetAudioOutBufferCount, GetAudioOutPlayedSampleCount and FlushAudioOutBuffers

This PR implement audout service calls:
- GetAudioOutBufferCount
- GetAudioOutPlayedSampleCount
- FlushAudioOutBuffers

The RE calls just give some hints about no extra checks.
Since we use a totally different implementation because of our backend, I can't do something better for now.

SetAudioOutVolume and GetAudioOutVolume are fixed too by set/get the volume of the current opened track, previous implementation was wrong.

This fix #1133, fix #1258 and fix #1519.

Thanks to @jduncanator for this help during the implementation and all his precious advices.

* Fix some debug leftovers

* Address jD feedback

1 files changed, 76 insertions, 25 deletions

diff --git a/Ryujinx.Audio/Renderers/OpenAL/OpenALAudioOut.cs b/Ryujinx.Audio/Renderers/OpenAL/OpenALAudioOut.cs
index fe82fced..abad0f17 100644
--- a/Ryujinx.Audio/Renderers/OpenAL/OpenALAudioOut.cs
+++ b/Ryujinx.Audio/Renderers/OpenAL/OpenALAudioOut.cs
@@ -38,16 +38,6 @@ namespace Ryujinx.Audio
         private Thread _audioPollerThread;
 
         /// <summary>
-        /// The volume of audio renderer
-        /// </summary>
-        private float _volume = 1.0f;
-
-        /// <summary>
-        /// True if the volume of audio renderer have changed
-        /// </summary>
-        private bool _volumeChanged;
-
-        /// <summary>
         /// True if OpenAL is supported on the device
         /// </summary>
         public static bool IsSupported
@@ -248,6 +238,8 @@ namespace Ryujinx.Audio
                     AL.SourceQueueBuffer(track.SourceId, bufferId);
 
                     StartPlaybackIfNeeded(track);
+
+                    track.PlayedSampleCount += (ulong)buffer.Length;
                 }
             }
         }
@@ -277,13 +269,6 @@ namespace Ryujinx.Audio
 
             if (State != ALSourceState.Playing && track.State == PlaybackState.Playing)
             {
-                if (_volumeChanged)
-                {
-                    AL.Source(track.SourceId, ALSourcef.Gain, _volume);
-
-                    _volumeChanged = false;
-                }
-
                 AL.SourcePlay(track.SourceId);
             }
         }
@@ -306,21 +291,87 @@ namespace Ryujinx.Audio
         }
 
         /// <summary>
-        /// Get playback volume
+        /// Get track buffer count
         /// </summary>
-        public float GetVolume() => _volume;
+        /// <param name="trackId">The ID of the track to get buffer count</param>
+        public uint GetBufferCount(int trackId)
+        {
+            if (_tracks.TryGetValue(trackId, out OpenALAudioTrack track))
+            {
+                lock (track)
+                {
+                    return track.BufferCount;
+                }
+            }
+
+            return 0;
+        }
 
         /// <summary>
-        /// Set playback volume
+        /// Get track played sample count
         /// </summary>
-        /// <param name="volume">The volume of the playback</param>
-        public void SetVolume(float volume)
+        /// <param name="trackId">The ID of the track to get played sample count</param>
+        public ulong GetPlayedSampleCount(int trackId)
         {
-            if (!_volumeChanged)
+            if (_tracks.TryGetValue(trackId, out OpenALAudioTrack track))
             {
-                _volume        = volume;
-                _volumeChanged = true;
+                lock (track)
+                {
+                    return track.PlayedSampleCount;
+                }
             }
+
+            return 0;
+        }
+
+        /// <summary>
+        /// Flush all track buffers
+        /// </summary>
+        /// <param name="trackId">The ID of the track to flush</param>
+        public bool FlushBuffers(int trackId)
+        {
+            if (_tracks.TryGetValue(trackId, out OpenALAudioTrack track))
+            {
+                lock (track)
+                {
+                    track.FlushBuffers();
+                }
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Set track volume
+        /// </summary>
+        /// <param name="trackId">The ID of the track to set volume</param>
+        /// <param name="volume">The volume of the track</param>
+        public void SetVolume(int trackId, float volume)
+        {
+            if (_tracks.TryGetValue(trackId, out OpenALAudioTrack track))
+            {
+                lock (track)
+                {
+                    track.SetVolume(volume);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Get track volume
+        /// </summary>
+        /// <param name="trackId">The ID of the track to get volume</param>
+        public float GetVolume(int trackId)
+        {
+            if (_tracks.TryGetValue(trackId, out OpenALAudioTrack track))
+            {
+                lock (track)
+                {
+                    return track.Volume;
+                }
+            }
+
+            return 1.0f;
         }
 
         /// <summary>