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      1 /*
      2  * Copyright (C) 2009 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef WebMediaPlayer_h
     32 #define WebMediaPlayer_h
     33 
     34 #include "WebCanvas.h"
     35 #include "WebMediaSource.h"
     36 #include "WebString.h"
     37 #include "WebTimeRange.h"
     38 
     39 namespace blink {
     40 
     41 class WebAudioSourceProvider;
     42 class WebAudioSourceProviderClient;
     43 class WebMediaPlayerClient;
     44 class WebString;
     45 class WebURL;
     46 struct WebRect;
     47 struct WebSize;
     48 class WebGraphicsContext3D;
     49 
     50 class WebMediaPlayer {
     51 public:
     52     enum NetworkState {
     53         NetworkStateEmpty,
     54         NetworkStateIdle,
     55         NetworkStateLoading,
     56         NetworkStateLoaded,
     57         NetworkStateFormatError,
     58         NetworkStateNetworkError,
     59         NetworkStateDecodeError,
     60     };
     61 
     62     enum ReadyState {
     63         ReadyStateHaveNothing,
     64         ReadyStateHaveMetadata,
     65         ReadyStateHaveCurrentData,
     66         ReadyStateHaveFutureData,
     67         ReadyStateHaveEnoughData,
     68     };
     69 
     70     enum Preload {
     71         PreloadNone,
     72         PreloadMetaData,
     73         PreloadAuto,
     74     };
     75 
     76     // Represents synchronous exceptions that can be thrown from the Encrypted
     77     // Media methods. This is different from the asynchronous MediaKeyError.
     78     enum MediaKeyException {
     79         MediaKeyExceptionNoError,
     80         MediaKeyExceptionInvalidPlayerState,
     81         MediaKeyExceptionKeySystemNotSupported,
     82         MediaKeyExceptionInvalidAccess,
     83     };
     84 
     85     enum CORSMode {
     86         CORSModeUnspecified,
     87         CORSModeAnonymous,
     88         CORSModeUseCredentials,
     89     };
     90 
     91     enum LoadType {
     92         LoadTypeURL,
     93         LoadTypeMediaSource,
     94         LoadTypeMediaStream,
     95     };
     96 
     97     virtual ~WebMediaPlayer() { }
     98 
     99     virtual void load(LoadType, const WebURL&, CORSMode) = 0;
    100 
    101     // Playback controls.
    102     virtual void play() = 0;
    103     virtual void pause() = 0;
    104     virtual bool supportsFullscreen() const = 0;
    105     virtual bool supportsSave() const = 0;
    106     virtual void seek(double seconds) = 0;
    107     virtual void setRate(double) = 0;
    108     virtual void setVolume(double) = 0;
    109     virtual void setPreload(Preload) { };
    110     virtual const WebTimeRanges& buffered() = 0;
    111     virtual double maxTimeSeekable() const = 0;
    112 
    113     virtual void paint(WebCanvas*, const WebRect&, unsigned char alpha) = 0;
    114 
    115     // True if the loaded media has a playable video/audio track.
    116     virtual bool hasVideo() const = 0;
    117     virtual bool hasAudio() const = 0;
    118 
    119     // Dimension of the video.
    120     virtual WebSize naturalSize() const = 0;
    121 
    122     // Getters of playback state.
    123     virtual bool paused() const = 0;
    124     virtual bool seeking() const = 0;
    125     virtual double duration() const = 0;
    126     virtual double currentTime() const = 0;
    127 
    128     // Internal states of loading and network.
    129     virtual NetworkState networkState() const = 0;
    130     virtual ReadyState readyState() const = 0;
    131 
    132     virtual bool didLoadingProgress() const = 0;
    133 
    134     virtual bool hasSingleSecurityOrigin() const = 0;
    135     virtual bool didPassCORSAccessCheck() const = 0;
    136 
    137     virtual double mediaTimeForTimeValue(double timeValue) const = 0;
    138 
    139     virtual unsigned decodedFrameCount() const = 0;
    140     virtual unsigned droppedFrameCount() const = 0;
    141     virtual unsigned corruptedFrameCount() const { return 0; };
    142     virtual unsigned audioDecodedByteCount() const = 0;
    143     virtual unsigned videoDecodedByteCount() const = 0;
    144 
    145     // Do a GPU-GPU textures copy if possible.
    146     virtual bool copyVideoTextureToPlatformTexture(WebGraphicsContext3D*, unsigned texture, unsigned level, unsigned internalFormat, unsigned type, bool premultiplyAlpha, bool flipY) { return false; }
    147 
    148     virtual WebAudioSourceProvider* audioSourceProvider() { return 0; }
    149 
    150     // Returns whether keySystem is supported. If true, the result will be
    151     // reported by an event.
    152     virtual MediaKeyException generateKeyRequest(const WebString& keySystem, const unsigned char* initData, unsigned initDataLength) { return MediaKeyExceptionKeySystemNotSupported; }
    153     virtual MediaKeyException addKey(const WebString& keySystem, const unsigned char* key, unsigned keyLength, const unsigned char* initData, unsigned initDataLength, const WebString& sessionId) { return MediaKeyExceptionKeySystemNotSupported; }
    154     virtual MediaKeyException cancelKeyRequest(const WebString& keySystem, const WebString& sessionId) { return MediaKeyExceptionKeySystemNotSupported; }
    155 
    156     // Instruct WebMediaPlayer to enter/exit fullscreen.
    157     virtual void enterFullscreen() { }
    158     virtual void exitFullscreen() { }
    159     // Returns true if the player can enter fullscreen.
    160     virtual bool canEnterFullscreen() const { return false; }
    161 };
    162 
    163 } // namespace blink
    164 
    165 #endif
    166