/// <summary>
/// Captures a video frame, asynchronously.
/// </summary>
/// <returns>A task that represents the asynchronous capture operation.</returns>
/// <feature>http://tizen.org/feature/multimedia.raw_video</feature>
/// <remarks>The player must be in the <see cref="PlayerState.Playing"/> or <see cref="PlayerState.Paused"/> state.</remarks>
/// <exception cref="ObjectDisposedException">The player has already been disposed of.</exception>
/// <exception cref="InvalidOperationException">The player is not in the valid state.</exception>
/// <exception cref="NotSupportedException">The required feature is not supported.</exception>
/// <since_tizen> 3 </since_tizen>
public async Task <CapturedFrame> CaptureVideoAsync()
{
ValidationUtil.ValidateFeatureSupported(PlayerFeatures.RawVideo);
ValidatePlayerState(PlayerState.Playing, PlayerState.Paused);
TaskCompletionSource <CapturedFrame> t = new TaskCompletionSource <CapturedFrame>();
NativePlayer.VideoCaptureCallback cb = (data, width, height, size, _) =>
{
Debug.Assert(size <= int.MaxValue);
byte[] buf = new byte[size];
Marshal.Copy(data, buf, 0, (int)size);
t.TrySetResult(new CapturedFrame(buf, width, height));
};
using (var cbKeeper = ObjectKeeper.Get(cb))
{
NativePlayer.CaptureVideo(Handle, cb)
.ThrowIfFailed(this, "Failed to capture the video");
return(await t.Task);
}
}
private async Task <int> SeekAsync(
Func <RadioHandle, Native.SeekCompletedCallback, IntPtr, RadioError> func)
{
ValidateRadioState(RadioState.Playing);
var tcs = new TaskCompletionSource <int>();
Native.SeekCompletedCallback callback =
(currentFrequency, _) => tcs.TrySetResult(currentFrequency);
using (ObjectKeeper.Get(callback))
{
func(Handle, callback, IntPtr.Zero).ThrowIfFailed("Failed to seek");
return(await tcs.Task);
}
}
private static async Task StartAsyncCore(string path, AudioStreamPolicy streamPolicy,
CancellationToken cancellationToken)
{
var tcs = new TaskCompletionSource <bool>();
Native.WavPlayerCompletedCallback cb = (id_, _) => tcs.TrySetResult(true);
using (ObjectKeeper.Get(cb))
{
Native.Start(path, streamPolicy.Handle, cb, IntPtr.Zero, out var id).
Validate("Failed to play.");
using (RegisterCancellationAction(tcs, cancellationToken, id))
{
await tcs.Task;
}
}
}
private async Task SetPlayPosition(long position, bool accurate, bool nanoseconds)
{
var taskCompletionSource = new TaskCompletionSource <bool>(TaskCreationOptions.RunContinuationsAsynchronously);
bool immediateResult = _source is MediaStreamSource;
NativePlayer.SeekCompletedCallback cb = _ => taskCompletionSource.TrySetResult(true);
using (var cbKeeper = ObjectKeeper.Get(cb))
{
NativeSetPlayPosition(position, accurate, nanoseconds, immediateResult ? null : cb);
if (immediateResult)
{
taskCompletionSource.TrySetResult(true);
}
await taskCompletionSource.Task;
}
}
/// <summary>
/// Sets the seek position for playback, asynchronously.
/// </summary>
/// <param name="position">The value indicating a desired position in milliseconds.</param>
/// <param name="accurate">The value indicating whether the operation performs with accuracy.</param>
/// <remarks>
/// <para>The player must be in the <see cref="PlayerState.Ready"/>, <see cref="PlayerState.Playing"/>,
/// or <see cref="PlayerState.Paused"/> state.</para>
/// <para>If the <paramref name="accurate"/> is true, the play position will be adjusted as the specified <paramref name="position"/> value,
/// but this might be considerably slow. If false, the play position will be a nearest keyframe position.</para>
/// </remarks>
/// <exception cref="ObjectDisposedException">The player has already been disposed of.</exception>
/// <exception cref="InvalidOperationException">The player is not in the valid state.</exception>
/// <exception cref="ArgumentOutOfRangeException">The specified position is not valid.</exception>
/// <seealso cref="GetPlayPosition"/>
/// <since_tizen> 3 </since_tizen>
public async Task SetPlayPositionAsync(int position, bool accurate)
{
ValidatePlayerState(PlayerState.Ready, PlayerState.Playing, PlayerState.Paused);
var taskCompletionSource = new TaskCompletionSource <bool>(TaskCreationOptions.RunContinuationsAsynchronously);
bool immediateResult = _source is MediaStreamSource;
NativePlayer.SeekCompletedCallback cb = _ => taskCompletionSource.TrySetResult(true);
using (var cbKeeper = ObjectKeeper.Get(cb))
{
SetPlayPosition(position, accurate, cb);
if (immediateResult)
{
taskCompletionSource.TrySetResult(true);
}
await taskCompletionSource.Task;
}
}
