X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=src%2FTizen.Multimedia.MediaPlayer%2FPlayer%2FPlayer.cs;h=ac1b78f64a1aa2ad67a94eb0becc0bbd52a861a3;hb=2b5864e3b7d3aac4d4d6f768bfdff518a16d388d;hp=10f939ace453ef6aac878ac262e8fbe1d08bea63;hpb=d38463ecb8859124318ce7539f0cc3d6f18317d9;p=platform%2Fcore%2Fcsapi%2Ftizenfx.git

diff --git a/src/Tizen.Multimedia.MediaPlayer/Player/Player.cs b/src/Tizen.Multimedia.MediaPlayer/Player/Player.cs
index 10f939a..ac1b78f 100644
--- a/src/Tizen.Multimedia.MediaPlayer/Player/Player.cs
+++ b/src/Tizen.Multimedia.MediaPlayer/Player/Player.cs
@@ -346,6 +346,75 @@ namespace Tizen.Multimedia
         }
 
         /// <summary>
+        /// Prepares the cancellable media player for playback, asynchronously.
+        /// </summary>
+        /// <param name="cancellationToken">The cancellation token to cancel preparing.</param>
+        /// <seealso cref="CancellationToken"/>
+        /// <returns>A task that represents the asynchronous prepare operation.</returns>
+        /// <remarks>To prepare the player, the player must be in the <see cref="PlayerState.Idle"/> state,
+        /// and a source must be set.
+        /// The state must be <see cref="PlayerState.Preparing"/> to cancel preparing.
+        /// When preparing is cancelled, a state will be changed to <see cref="PlayerState.Idle"/> from <see cref="PlayerState.Preparing"/>.</remarks>
+        /// <exception cref="ObjectDisposedException">The player has already been disposed of.</exception>
+        /// <exception cref="InvalidOperationException">
+        ///     Operation failed; internal error.
+        ///     -or-<br/>
+        ///     The player is not in the valid state.
+        ///     </exception>
+        /// <seealso cref="PrepareAsync()"/>
+        /// <seealso cref="Unprepare()"/>
+        /// <since_tizen> 6 </since_tizen>
+        public virtual async Task PrepareAsync(CancellationToken cancellationToken)
+        {
+            ValidateNotDisposed();
+
+            var taskCompletionSource = new TaskCompletionSource<bool>();
+
+            if (_source == null)
+            {
+                throw new InvalidOperationException("No source is set.");
+            }
+
+            ValidatePlayerState(PlayerState.Idle);
+
+            OnPreparing();
+
+            SetPreparing();
+
+            // register a callback to handle cancellation token anytime it occurs
+            cancellationToken.Register(() =>
+            {
+                ValidatePlayerState(PlayerState.Preparing);
+
+                // a user can get the state before finally block is called.
+                ClearPreparing();
+
+                Log.Warn(PlayerLog.Tag, $"preparing will be cancelled.");
+                NativePlayer.Unprepare(Handle).ThrowIfFailed(this, "Failed to unprepare the player");
+
+                taskCompletionSource.TrySetCanceled();
+            });
+
+            _prepareCallback = _ =>
+            {
+                Log.Warn(PlayerLog.Tag, $"prepared callback is called.");
+                taskCompletionSource.TrySetResult(true);
+            };
+
+            try
+            {
+                NativePlayer.PrepareAsync(Handle, _prepareCallback, IntPtr.Zero).
+                    ThrowIfFailed(this, "Failed to prepare the player");
+
+                await taskCompletionSource.Task.ConfigureAwait(false);
+            }
+            finally
+            {
+                ClearPreparing();
+            }
+        }
+
+        /// <summary>
         /// Unprepares the player.
         /// </summary>
         /// <remarks>
@@ -889,7 +958,7 @@ namespace Tizen.Multimedia
         /// <summary>
         /// Enable to decode an audio data for exporting PCM from a data.
         /// </summary>
-        /// <param name="format">The media format handle about required audio PCM specification.
+        /// <param name="format">The media format handle required to audio PCM specification.
         /// The format has to include <see cref="AudioMediaFormat.MimeType"/>,
         /// <see cref="AudioMediaFormat.Channel"/> and <see cref="AudioMediaFormat.SampleRate"/>.
         /// If the format is NULL, the original PCM format or platform default PCM format will be applied.</param>
@@ -915,8 +984,6 @@ namespace Tizen.Multimedia
             ValidatePlayerState(PlayerState.Idle);
             ValidationUtil.ValidateEnum(typeof(PlayerAudioExtractOption), option, nameof(option));
 
-            IntPtr formatHandle = IntPtr.Zero;
-
             _audioFrameDecodedCallback = (IntPtr packetHandle, IntPtr userData) =>
             {
                 var handler = AudioDataDecoded;
@@ -932,10 +999,8 @@ namespace Tizen.Multimedia
                 }
             };
 
-            formatHandle = format.AsNativeHandle();
-
-            NativePlayer.SetAudioFrameDecodedCb(Handle, formatHandle, option, _audioFrameDecodedCallback, IntPtr.Zero).
-                ThrowIfFailed(this, "Failed to register the _audioFrameDecoded");
+            NativePlayer.SetAudioFrameDecodedCb(Handle, format == null ? IntPtr.Zero : format.AsNativeHandle(), option,
+                _audioFrameDecodedCallback, IntPtr.Zero).ThrowIfFailed(this, "Failed to register the _audioFrameDecoded");
         }
 
         /// <summary>