1/*
2 * Copyright (C) 2013 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "AVTrackPrivateAVFObjCImpl.h"
28
29#if ENABLE(VIDEO_TRACK)
30
31#import "SoftLinking.h"
32#import <objc/runtime.h>
33#import <AVFoundation/AVAssetTrack.h>
34#import <AVFoundation/AVPlayerItemTrack.h>
35#import <AVFoundation/AVMetadataItem.h>
36
37SOFT_LINK_FRAMEWORK_OPTIONAL(AVFoundation)
38
39SOFT_LINK_CLASS(AVFoundation, AVAssetTrack)
40SOFT_LINK_CLASS(AVFoundation, AVPlayerItemTrack)
41SOFT_LINK_CLASS(AVFoundation, AVMetadataItem)
42
43SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVMediaCharacteristicIsMainProgramContent, NSString *)
44SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVMediaCharacteristicDescribesVideoForAccessibility, NSString *)
45SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVMediaCharacteristicIsAuxiliaryContent, NSString *)
46SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVMediaCharacteristicTranscribesSpokenDialogForAccessibility, NSString *)
47SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVMetadataCommonKeyTitle, NSString *)
48SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVMetadataKeySpaceCommon, NSString *)
49
50#define AVMetadataItem getAVMetadataItemClass()
51
52#define AVMediaCharacteristicIsMainProgramContent getAVMediaCharacteristicIsMainProgramContent()
53#define AVMediaCharacteristicDescribesVideoForAccessibility getAVMediaCharacteristicDescribesVideoForAccessibility()
54#define AVMediaCharacteristicIsAuxiliaryContent getAVMediaCharacteristicIsAuxiliaryContent()
55#define AVMediaCharacteristicTranscribesSpokenDialogForAccessibility getAVMediaCharacteristicTranscribesSpokenDialogForAccessibility()
56#define AVMetadataCommonKeyTitle getAVMetadataCommonKeyTitle()
57#define AVMetadataKeySpaceCommon getAVMetadataKeySpaceCommon()
58
59namespace WebCore {
60
61AVTrackPrivateAVFObjCImpl::AVTrackPrivateAVFObjCImpl(AVPlayerItemTrack* track)
62    : m_playerItemTrack(track)
63    , m_assetTrack([track assetTrack])
64{
65}
66
67AVTrackPrivateAVFObjCImpl::AVTrackPrivateAVFObjCImpl(AVAssetTrack* track)
68    : m_assetTrack(track)
69{
70}
71
72bool AVTrackPrivateAVFObjCImpl::enabled() const
73{
74    ASSERT(m_playerItemTrack);
75    return [m_playerItemTrack isEnabled];
76}
77
78void AVTrackPrivateAVFObjCImpl::setEnabled(bool enabled)
79{
80    ASSERT(m_playerItemTrack);
81    [m_playerItemTrack setEnabled:enabled];
82}
83
84AudioTrackPrivate::Kind AVTrackPrivateAVFObjCImpl::audioKind() const
85{
86    if ([m_assetTrack hasMediaCharacteristic:AVMediaCharacteristicIsAuxiliaryContent])
87        return AudioTrackPrivate::Alternative;
88    else if ([m_assetTrack hasMediaCharacteristic:AVMediaCharacteristicIsMainProgramContent])
89        return AudioTrackPrivate::Main;
90    return AudioTrackPrivate::None;
91}
92
93VideoTrackPrivate::Kind AVTrackPrivateAVFObjCImpl::videoKind() const
94{
95    if ([m_assetTrack hasMediaCharacteristic:AVMediaCharacteristicDescribesVideoForAccessibility])
96        return VideoTrackPrivate::Sign;
97    else if ([m_assetTrack hasMediaCharacteristic:AVMediaCharacteristicTranscribesSpokenDialogForAccessibility])
98        return VideoTrackPrivate::Captions;
99    else if ([m_assetTrack hasMediaCharacteristic:AVMediaCharacteristicIsAuxiliaryContent])
100        return VideoTrackPrivate::Alternative;
101    else if ([m_assetTrack hasMediaCharacteristic:AVMediaCharacteristicIsMainProgramContent])
102        return VideoTrackPrivate::Main;
103    return VideoTrackPrivate::None;
104}
105
106AtomicString AVTrackPrivateAVFObjCImpl::id() const
107{
108    return String::format("%d", [m_assetTrack trackID]);
109}
110
111AtomicString AVTrackPrivateAVFObjCImpl::label() const
112{
113    NSArray *titles = [AVMetadataItem metadataItemsFromArray:[m_assetTrack commonMetadata] withKey:AVMetadataCommonKeyTitle keySpace:AVMetadataKeySpaceCommon];
114    if (![titles count])
115        return emptyAtom;
116
117    // If possible, return a title in one of the user's preferred languages.
118    NSArray *titlesForPreferredLanguages = [AVMetadataItem metadataItemsFromArray:titles filteredAndSortedAccordingToPreferredLanguages:[NSLocale preferredLanguages]];
119    if ([titlesForPreferredLanguages count])
120        return [[titlesForPreferredLanguages objectAtIndex:0] stringValue];
121    return [[titles objectAtIndex:0] stringValue];
122}
123
124AtomicString AVTrackPrivateAVFObjCImpl::language() const
125{
126    return languageForAVAssetTrack(m_assetTrack.get());
127}
128
129String AVTrackPrivateAVFObjCImpl::languageForAVAssetTrack(AVAssetTrack* track)
130{
131    NSString *language = [track extendedLanguageTag];
132
133    // If the language code is stored as a QuickTime 5-bit packed code there aren't enough bits for a full
134    // RFC 4646 language tag so extendedLanguageTag returns NULL. In this case languageCode will return the
135    // ISO 639-2/T language code so check it.
136    if (!language)
137        language = [track languageCode];
138
139    // Some legacy tracks have "und" as a language, treat that the same as no language at all.
140    if (!language || [language isEqualToString:@"und"])
141        return emptyString();
142
143    return language;
144}
145
146int AVTrackPrivateAVFObjCImpl::trackID() const
147{
148    return [m_assetTrack trackID];
149}
150
151}
152
153#endif // ENABLE(VIDEO_TRACK)
154