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//
// PlayerEngineService.cs
//
// Author:
// Aaron Bockover <abockover@novell.com>
//
// Copyright (C) 2006-2008 Novell, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.IO;
using System.Collections.Generic;
using System.Reflection;
using Mono.Unix;
using Mono.Addins;
using Hyena;
using Banshee.Base;
using Banshee.Streaming;
using Banshee.ServiceStack;
using Banshee.Sources;
using Banshee.Query;
using Banshee.Metadata;
using Banshee.Configuration;
using Banshee.Collection;
using Banshee.Equalizer;
using Banshee.Collection.Database;
namespace Banshee.MediaEngine
{
public delegate bool TrackInterceptHandler (TrackInfo track);
public class PlayerEngineService : IInitializeService, IDelayedInitializeService,
IRequiredService, IPlayerEngineService, IDBusExportable, IDisposable
{
private List<PlayerEngine> engines = new List<PlayerEngine> ();
private PlayerEngine active_engine;
private PlayerEngine default_engine;
private PlayerEngine pending_engine;
private object pending_playback_for_not_ready;
private bool pending_playback_for_not_ready_play;
private TrackInfo synthesized_contacting_track;
private string preferred_engine_id = null;
public event EventHandler PlayWhenIdleRequest;
public event TrackInterceptHandler TrackIntercept;
public event Action<PlayerEngine> EngineBeforeInitialize;
public event Action<PlayerEngine> EngineAfterInitialize;
private event DBusPlayerEventHandler dbus_event_changed;
event DBusPlayerEventHandler IPlayerEngineService.EventChanged {
add { dbus_event_changed += value; }
remove { dbus_event_changed -= value; }
}
private event DBusPlayerStateHandler dbus_state_changed;
event DBusPlayerStateHandler IPlayerEngineService.StateChanged {
add { dbus_state_changed += value; }
remove { dbus_state_changed -= value; }
}
public PlayerEngineService ()
{
}
void IInitializeService.Initialize ()
{
preferred_engine_id = EngineSchema.Get();
if (default_engine == null && engines.Count > 0) {
default_engine = engines[0];
}
foreach (TypeExtensionNode node in AddinManager.GetExtensionNodes ("/Banshee/MediaEngine/PlayerEngine")) {
LoadEngine (node);
}
if (default_engine != null) {
active_engine = default_engine;
Log.Debug (Catalog.GetString ("Default player engine"), active_engine.Name);
} else {
default_engine = active_engine;
}
if (default_engine == null || active_engine == null || engines == null || engines.Count == 0) {
Log.Warning (Catalog.GetString (
"No player engines were found. Please ensure Banshee has been cleanly installed."),
"Using the featureless NullPlayerEngine.");
PlayerEngine null_engine = new NullPlayerEngine ();
LoadEngine (null_engine);
active_engine = null_engine;
default_engine = null_engine;
}
MetadataService.Instance.HaveResult += OnMetadataServiceHaveResult;
TrackInfo.IsPlayingMethod = track => IsPlaying (track) &&
track.CacheModelId == CurrentTrack.CacheModelId &&
(track.CacheEntryId == null || track.CacheEntryId.Equals (CurrentTrack.CacheEntryId));
}
private void InitializeEngine (PlayerEngine engine)
{
var handler = EngineBeforeInitialize;
if (handler != null) {
handler (engine);
}
engine.Initialize ();
engine.IsInitialized = true;
handler = EngineAfterInitialize;
if (handler != null) {
handler (engine);
}
}
void IDelayedInitializeService.DelayedInitialize ()
{
foreach (var engine in Engines) {
if (engine.DelayedInitialize) {
InitializeEngine (engine);
}
}
}
private void LoadEngine (TypeExtensionNode node)
{
LoadEngine ((PlayerEngine) node.CreateInstance (typeof (PlayerEngine)));
}
private void LoadEngine (PlayerEngine engine)
{
if (!engine.DelayedInitialize) {
InitializeEngine (engine);
}
engine.EventChanged += OnEngineEventChanged;
if (engine.Id == preferred_engine_id) {
DefaultEngine = engine;
} else {
if (active_engine == null) {
active_engine = engine;
}
engines.Add (engine);
}
}
public void Dispose ()
{
MetadataService.Instance.HaveResult -= OnMetadataServiceHaveResult;
foreach (PlayerEngine engine in engines) {
engine.Dispose ();
}
active_engine = null;
default_engine = null;
pending_engine = null;
preferred_engine_id = null;
engines.Clear ();
}
private void OnMetadataServiceHaveResult (object o, MetadataLookupResultArgs args)
{
if (CurrentTrack != null && CurrentTrack.TrackEqual (args.Track as TrackInfo)) {
foreach (StreamTag tag in args.ResultTags) {
StreamTagger.TrackInfoMerge (CurrentTrack, tag);
}
OnEngineEventChanged (new PlayerEventArgs (PlayerEvent.TrackInfoUpdated));
}
}
private void HandleStateChange (PlayerEventStateChangeArgs args)
{
if (args.Current == PlayerState.Loaded && CurrentTrack != null) {
MetadataService.Instance.Lookup (CurrentTrack);
} else if (args.Current == PlayerState.Ready) {
// Enable our preferred equalizer if it exists and was enabled last time.
if (SupportsEqualizer) {
EqualizerManager.Instance.Select ();
}
if (pending_playback_for_not_ready != null) {
OpenCheck (pending_playback_for_not_ready, pending_playback_for_not_ready_play);
pending_playback_for_not_ready = null;
pending_playback_for_not_ready_play = false;
}
}
DBusPlayerStateHandler dbus_handler = dbus_state_changed;
if (dbus_handler != null) {
dbus_handler (args.Current.ToString ().ToLower ());
}
}
private void OnEngineEventChanged (PlayerEventArgs args)
{
if (CurrentTrack != null) {
if (args.Event == PlayerEvent.Error
&& CurrentTrack.PlaybackError == StreamPlaybackError.None) {
CurrentTrack.SavePlaybackError (StreamPlaybackError.Unknown);
} else if (args.Event == PlayerEvent.Iterate
&& CurrentTrack.PlaybackError != StreamPlaybackError.None) {
CurrentTrack.SavePlaybackError (StreamPlaybackError.None);
}
}
if (args.Event == PlayerEvent.StartOfStream) {
incremented_last_played = false;
} else if (args.Event == PlayerEvent.EndOfStream) {
IncrementLastPlayed ();
}
RaiseEvent (args);
// Do not raise iterate across DBus to avoid so many calls;
// DBus clients should do their own iterating and
// event/state checking locally
if (args.Event == PlayerEvent.Iterate) {
return;
}
DBusPlayerEventHandler dbus_handler = dbus_event_changed;
if (dbus_handler != null) {
dbus_handler (args.Event.ToString ().ToLower (),
args is PlayerEventErrorArgs ? ((PlayerEventErrorArgs)args).Message : String.Empty,
args is PlayerEventBufferingArgs ? ((PlayerEventBufferingArgs)args).Progress : 0
);
}
}
private void OnPlayWhenIdleRequest ()
{
EventHandler handler = PlayWhenIdleRequest;
if (handler != null) {
handler (this, EventArgs.Empty);
}
}
private bool OnTrackIntercept (TrackInfo track)
{
TrackInterceptHandler handler = TrackIntercept;
if (handler == null) {
return false;
}
bool handled = false;
foreach (TrackInterceptHandler single_handler in handler.GetInvocationList ()) {
handled |= single_handler (track);
}
return handled;
}
public void Open (TrackInfo track)
{
OpenPlay (track, false);
}
public void Open (SafeUri uri)
{
// Check if the uri exists
if (uri == null || !File.Exists (uri.AbsolutePath)) {
return;
}
bool found = false;
if (ServiceManager.DbConnection != null) {
// Try to find uri in the library
int track_id = DatabaseTrackInfo.GetTrackIdForUri (uri);
if (track_id > 0) {
DatabaseTrackInfo track_db = DatabaseTrackInfo.Provider.FetchSingle (track_id);
found = true;
Open (track_db);
}
}
if (!found) {
// Not in the library, get info from the file
TrackInfo track = new TrackInfo ();
using (var file = StreamTagger.ProcessUri (uri)) {
StreamTagger.TrackInfoMerge (track, file, false);
}
Open (track);
}
}
void IPlayerEngineService.Open (string uri)
{
Open (new SafeUri (uri));
}
public void SetNextTrack (TrackInfo track)
{
if (track != null && EnsureActiveEngineCanPlay (track.Uri)) {
active_engine.SetNextTrack (track);
} else {
active_engine.SetNextTrack ((TrackInfo) null);
}
}
public void SetNextTrack (SafeUri uri)
{
if (EnsureActiveEngineCanPlay (uri)) {
active_engine.SetNextTrack (uri);
} else {
active_engine.SetNextTrack ((SafeUri) null);
}
}
private bool EnsureActiveEngineCanPlay (SafeUri uri)
{
if (uri == null) {
// No engine can play the null URI.
return false;
}
if (active_engine != FindSupportingEngine (uri)) {
if (active_engine.CurrentState == PlayerState.Playing) {
// If we're currently playing then we can't switch engines now.
// We can't ensure the active engine can play this URI.
return false;
} else {
// If we're not playing, we can switch the active engine to
// something that will play this URI.
SwitchToEngine (FindSupportingEngine (uri));
CheckPending ();
return true;
}
}
return true;
}
public void OpenPlay (TrackInfo track)
{
OpenPlay (track, true);
}
private void OpenPlay (TrackInfo track, bool play)
{
if (track == null || !track.CanPlay || OnTrackIntercept (track)) {
return;
}
try {
OpenCheck (track, play);
} catch (Exception e) {
Log.Exception (e);
Log.Error (Catalog.GetString ("Problem with Player Engine"), e.Message, true);
Close ();
ActiveEngine = default_engine;
}
}
private void OpenCheck (object o, bool play)
{
if (CurrentState == PlayerState.NotReady) {
pending_playback_for_not_ready = o;
pending_playback_for_not_ready_play = play;
return;
}
SafeUri uri = null;
TrackInfo track = null;
if (o is SafeUri) {
uri = (SafeUri)o;
} else if (o is TrackInfo) {
track = (TrackInfo)o;
uri = track.Uri;
} else {
return;
}
if (track != null && (track.MediaAttributes & TrackMediaAttributes.ExternalResource) != 0) {
RaiseEvent (new PlayerEventArgs (PlayerEvent.EndOfStream));
return;
}
PlayerEngine supportingEngine = FindSupportingEngine (uri);
SwitchToEngine (supportingEngine);
CheckPending ();
if (track != null) {
active_engine.Open (track);
} else if (uri != null) {
active_engine.Open (uri);
}
if (play) {
active_engine.Play ();
}
}
public void IncrementLastPlayed ()
{
// If Length <= 0 assume 100% completion.
IncrementLastPlayed (active_engine.Length <= 0
? 1.0
: (double)active_engine.Position / active_engine.Length);
}
private bool incremented_last_played = true;
public void IncrementLastPlayed (double completed)
{
if (!incremented_last_played && CurrentTrack != null && CurrentTrack.PlaybackError == StreamPlaybackError.None) {
CurrentTrack.OnPlaybackFinished (completed);
incremented_last_played = true;
}
}
private PlayerEngine FindSupportingEngine (SafeUri uri)
{
foreach (PlayerEngine engine in engines) {
foreach (string extension in engine.ExplicitDecoderCapabilities) {
if (!uri.AbsoluteUri.EndsWith (extension)) {
continue;
}
return engine;
}
}
foreach (PlayerEngine engine in engines) {
foreach (string scheme in engine.SourceCapabilities) {
bool supported = scheme == uri.Scheme;
if (supported) {
return engine;
}
}
}
// If none of our engines support this URI, return the currently active one.
// There doesn't seem to be anything better to do.
return active_engine;
}
private bool SwitchToEngine (PlayerEngine switchTo)
{
if (active_engine != switchTo) {
Close ();
pending_engine = switchTo;
Log.DebugFormat ("Switching engine to: {0}", switchTo.GetType ());
return true;
}
return false;
}
public void Close ()
{
Close (false);
}
public void Close (bool fullShutdown)
{
IncrementLastPlayed ();
active_engine.Close (fullShutdown);
}
public void Play ()
{
if (CurrentState == PlayerState.Idle) {
OnPlayWhenIdleRequest ();
} else {
active_engine.Play ();
}
}
public void Pause ()
{
if (!CanPause) {
Close ();
} else {
active_engine.Pause ();
}
}
public void RestartCurrentTrack ()
{
var track = CurrentTrack;
if (track != null) {
// Don't process the track as played through IncrementLastPlayed, just play it again
active_engine.Close (false);
OpenPlay (track);
}
}
// For use by RadioTrackInfo
// TODO remove this method once RadioTrackInfo playlist downloading/parsing logic moved here?
internal void StartSynthesizeContacting (TrackInfo track)
{
//OnStateChanged (PlayerState.Contacting);
RaiseEvent (new PlayerEventStateChangeArgs (CurrentState, PlayerState.Contacting));
synthesized_contacting_track = track;
}
internal void EndSynthesizeContacting (TrackInfo track, bool idle)
{
if (track == synthesized_contacting_track) {
synthesized_contacting_track = null;
if (idle) {
RaiseEvent (new PlayerEventStateChangeArgs (PlayerState.Contacting, PlayerState.Idle));
}
}
}
public void TogglePlaying ()
{
if (IsPlaying () && CurrentState != PlayerState.Paused) {
Pause ();
} else if (CurrentState != PlayerState.NotReady) {
Play ();
}
}
public void VideoExpose (IntPtr displayContext, bool direct)
{
active_engine.VideoExpose (displayContext, direct);
}
public void VideoWindowRealize (IntPtr displayContext)
{
active_engine.VideoWindowRealize (displayContext);
}
public IntPtr VideoDisplayContext {
set { active_engine.VideoDisplayContext = value; }
get { return active_engine.VideoDisplayContext; }
}
public void TrackInfoUpdated ()
{
active_engine.TrackInfoUpdated ();
}
public bool IsPlaying (TrackInfo track)
{
return IsPlaying () && track != null && track.TrackEqual (CurrentTrack);
}
public bool IsPlaying ()
{
return CurrentState == PlayerState.Playing ||
CurrentState == PlayerState.Paused ||
CurrentState == PlayerState.Loaded ||
CurrentState == PlayerState.Loading ||
CurrentState == PlayerState.Contacting;
}
public string GetSubtitleDescription (int index)
{
return active_engine.GetSubtitleDescription (index);
}
public void NotifyMouseMove (double x, double y)
{
active_engine.NotifyMouseMove (x, y);
}
public void NotifyMouseButtonPressed (int button, double x, double y)
{
active_engine.NotifyMouseButtonPressed (button, x, y);
}
public void NotifyMouseButtonReleased (int button, double x, double y)
{
active_engine.NotifyMouseButtonReleased (button, x, y);
}
public void NavigateToLeftMenu ()
{
active_engine.NavigateToLeftMenu ();
}
public void NavigateToRightMenu ()
{
active_engine.NavigateToRightMenu ();
}
public void NavigateToUpMenu ()
{
active_engine.NavigateToUpMenu ();
}
public void NavigateToDownMenu ()
{
active_engine.NavigateToDownMenu ();
}
public void NavigateToMenu ()
{
active_engine.NavigateToMenu ();
}
public void ActivateCurrentMenu ()
{
active_engine.ActivateCurrentMenu ();
}
public void GoToNextChapter ()
{
active_engine.GoToNextChapter ();
}
public void GoToPreviousChapter ()
{
active_engine.GoToPreviousChapter ();
}
private void CheckPending ()
{
if (pending_engine != null && pending_engine != active_engine) {
if (active_engine.CurrentState == PlayerState.Idle) {
Close ();
}
active_engine = pending_engine;
pending_engine = null;
}
}
public TrackInfo CurrentTrack {
get {
return active_engine == null ? null : active_engine.CurrentTrack ?? synthesized_contacting_track;
}
}
private Dictionary<string, object> dbus_sucks;
IDictionary<string, object> IPlayerEngineService.CurrentTrack {
get {
// FIXME: Managed DBus sucks - it explodes if you transport null
// or even an empty dictionary (a{sv} in our case). Piece of shit.
if (dbus_sucks == null) {
dbus_sucks = new Dictionary<string, object> ();
dbus_sucks.Add (String.Empty, String.Empty);
}
return CurrentTrack == null ? dbus_sucks : CurrentTrack.GenerateExportable ();
}
}
public SafeUri CurrentSafeUri {
get { return active_engine.CurrentUri; }
}
string IPlayerEngineService.CurrentUri {
get { return CurrentSafeUri == null ? String.Empty : CurrentSafeUri.AbsoluteUri; }
}
public PlayerState CurrentState {
get { return synthesized_contacting_track != null ? PlayerState.Contacting : active_engine.CurrentState; }
}
string IPlayerEngineService.CurrentState {
get { return CurrentState.ToString ().ToLower (); }
}
public PlayerState LastState {
get { return active_engine.LastState; }
}
string IPlayerEngineService.LastState {
get { return LastState.ToString ().ToLower (); }
}
public ushort Volume {
get { return active_engine.Volume; }
set {
foreach (PlayerEngine engine in engines) {
engine.Volume = value;
}
}
}
public uint Position {
get { return active_engine.Position; }
set { active_engine.Position = value; }
}
public byte Rating {
get { return (byte)(CurrentTrack == null ? 0 : CurrentTrack.Rating); }
set {
if (CurrentTrack != null) {
CurrentTrack.Rating = (int)Math.Min (5u, value);
CurrentTrack.Save ();
foreach (var source in ServiceManager.SourceManager.Sources) {
var psource = source as PrimarySource;
if (psource != null) {
psource.NotifyTracksChanged (BansheeQuery.RatingField);
}
}
}
}
}
public bool CanSeek {
get { return active_engine.CanSeek; }
}
public bool CanPause {
get { return CurrentTrack != null && !CurrentTrack.IsLive; }
}
public bool SupportsEqualizer {
get { return ((active_engine is IEqualizer) && active_engine.SupportsEqualizer); }
}
public int SubtitleCount {
get { return active_engine.SubtitleCount; }
}
public int SubtitleIndex {
set { active_engine.SubtitleIndex = value; }
}
public SafeUri SubtitleUri {
set { active_engine.SubtitleUri = value; }
get { return active_engine.SubtitleUri; }
}
public bool InDvdMenu {
get { return active_engine.InDvdMenu; }
}
public VideoDisplayContextType VideoDisplayContextType {
get { return active_engine.VideoDisplayContextType; }
}
public uint Length {
get {
uint length = active_engine.Length;
if (length > 0) {
return length;
} else if (CurrentTrack == null) {
return 0;
}
return (uint) CurrentTrack.Duration.TotalSeconds;
}
}
public PlayerEngine ActiveEngine {
get { return active_engine; }
set { pending_engine = value; }
}
public PlayerEngine DefaultEngine {
get { return default_engine; }
set {
if (engines.Contains (value)) {
engines.Remove (value);
}
engines.Insert (0, value);
default_engine = value;
EngineSchema.Set (value.Id);
}
}
public IEnumerable<PlayerEngine> Engines {
get { return engines; }
}
#region Player Event System
private LinkedList<PlayerEventHandlerSlot> event_handlers = new LinkedList<PlayerEventHandlerSlot> ();
private struct PlayerEventHandlerSlot
{
public PlayerEvent EventMask;
public PlayerEventHandler Handler;
public PlayerEventHandlerSlot (PlayerEvent mask, PlayerEventHandler handler)
{
EventMask = mask;
Handler = handler;
}
}
private const PlayerEvent event_all_mask = PlayerEvent.Iterate
| PlayerEvent.StateChange
| PlayerEvent.StartOfStream
| PlayerEvent.EndOfStream
| PlayerEvent.Buffering
| PlayerEvent.Seek
| PlayerEvent.Error
| PlayerEvent.Volume
| PlayerEvent.Metadata
| PlayerEvent.TrackInfoUpdated
| PlayerEvent.RequestNextTrack
| PlayerEvent.PrepareVideoWindow;
private const PlayerEvent event_default_mask = event_all_mask & ~PlayerEvent.Iterate;
private static void VerifyEventMask (PlayerEvent eventMask)
{
if (eventMask <= PlayerEvent.None || eventMask > event_all_mask) {
throw new ArgumentOutOfRangeException ("eventMask", "A valid event mask must be provided");
}
}
public void ConnectEvent (PlayerEventHandler handler)
{
ConnectEvent (handler, event_default_mask, false);
}
public void ConnectEvent (PlayerEventHandler handler, PlayerEvent eventMask)
{
ConnectEvent (handler, eventMask, false);
}
public void ConnectEvent (PlayerEventHandler handler, bool connectAfter)
{
ConnectEvent (handler, event_default_mask, connectAfter);
}
public void ConnectEvent (PlayerEventHandler handler, PlayerEvent eventMask, bool connectAfter)
{
lock (event_handlers) {
VerifyEventMask (eventMask);
PlayerEventHandlerSlot slot = new PlayerEventHandlerSlot (eventMask, handler);
if (connectAfter) {
event_handlers.AddLast (slot);
} else {
event_handlers.AddFirst (slot);
}
}
}
private LinkedListNode<PlayerEventHandlerSlot> FindEventNode (PlayerEventHandler handler)
{
LinkedListNode<PlayerEventHandlerSlot> node = event_handlers.First;
while (node != null) {
if (node.Value.Handler == handler) {
return node;
}
node = node.Next;
}
return null;
}
public void DisconnectEvent (PlayerEventHandler handler)
{
lock (event_handlers) {
LinkedListNode<PlayerEventHandlerSlot> node = FindEventNode (handler);
if (node != null) {
event_handlers.Remove (node);
}
}
}
public void ModifyEvent (PlayerEvent eventMask, PlayerEventHandler handler)
{
lock (event_handlers) {
VerifyEventMask (eventMask);
LinkedListNode<PlayerEventHandlerSlot> node = FindEventNode (handler);
if (node != null) {
PlayerEventHandlerSlot slot = node.Value;
slot.EventMask = eventMask;
node.Value = slot;
}
}
}
private void RaiseEvent (PlayerEventArgs args)
{
lock (event_handlers) {
if (args.Event == PlayerEvent.StateChange && args is PlayerEventStateChangeArgs) {
HandleStateChange ((PlayerEventStateChangeArgs)args);
}
LinkedListNode<PlayerEventHandlerSlot> node = event_handlers.First;
while (node != null) {
if ((node.Value.EventMask & args.Event) == args.Event) {
try {
node.Value.Handler (args);
} catch (Exception e) {
Log.Exception (String.Format ("Error running PlayerEngine handler for {0}", args.Event), e);
}
}
node = node.Next;
}
}
}
#endregion
string IService.ServiceName {
get { return "PlayerEngine"; }
}
IDBusExportable IDBusExportable.Parent {
get { return null; }
}
public static readonly SchemaEntry<int> VolumeSchema = new SchemaEntry<int> (
"player_engine", "volume",
80,
"Volume",
"Volume of playback relative to mixer output"
);
public static readonly SchemaEntry<string> EngineSchema = new SchemaEntry<string> (
"player_engine", "backend",
"helix-remote",
"Backend",
"Name of media playback engine backend"
);
}
}
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