Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.mm

   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 COMPUTER, 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 COMPUTER, 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 #import "config.h"
  27 #import "SourceBufferPrivateAVFObjC.h"
  28
  29 #if ENABLE(MEDIA_SOURCE) && USE(AVFOUNDATION)
  30
  31 #import "ExceptionCodePlaceholder.h"
  32 #import "Logging.h"
  33 #import "MediaDescription.h"
  34 #import "MediaPlayerPrivateMediaSourceAVFObjC.h"
  35 #import "MediaSample.h"
  36 #import "MediaSourcePrivateAVFObjC.h"
  37 #import "MediaTimeMac.h"
  38 #import "NotImplemented.h"
  39 #import "SoftLinking.h"
  40 #import "SourceBufferPrivateClient.h"
  41 #import "TimeRanges.h"
  42 #import "AudioTrackPrivateMediaSourceAVFObjC.h"
  43 #import "VideoTrackPrivateMediaSourceAVFObjC.h"
  44 #import "InbandTextTrackPrivateAVFObjC.h"
  45 #import <AVFoundation/AVAssetTrack.h>
  46 #import <AVFoundation/AVSampleBufferDisplayLayer.h>
  47 #import <objc/runtime.h>
  48 #import <wtf/text/AtomicString.h>
  49 #import <wtf/text/CString.h>
  50 #import <wtf/HashCountedSet.h>
  51 #import <wtf/WeakPtr.h>
  52 #import <map>
  53
  54 #pragma mark -
  55 #pragma mark Soft Linking
  56
  57 SOFT_LINK_FRAMEWORK_OPTIONAL(AVFoundation)
  58 SOFT_LINK_FRAMEWORK_OPTIONAL(CoreMedia)
  59
  60 SOFT_LINK_CLASS(AVFoundation, AVAssetTrack)
  61 SOFT_LINK_CLASS(AVFoundation, AVStreamDataParser)
  62 SOFT_LINK_CLASS(AVFoundation, AVSampleBufferDisplayLayer)
  63
  64 SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVMediaTypeVideo, NSString *)
  65 SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVMediaTypeAudio, NSString *)
  66 SOFT_LINK_POINTER_OPTIONAL(AVFoundation, AVMediaTypeText, NSString *)
  67
  68 SOFT_LINK_CONSTANT(CoreMedia, kCMTimeZero, CMTime);
  69 SOFT_LINK_CONSTANT(CoreMedia, kCMTimeInvalid, CMTime);
  70 SOFT_LINK_CONSTANT(CoreMedia, kCMSampleAttachmentKey_DoNotDisplay, CFStringRef)
  71 SOFT_LINK_CONSTANT(CoreMedia, kCMSampleAttachmentKey_NotSync, CFStringRef)
  72 SOFT_LINK_CONSTANT(CoreMedia, kCMSampleBufferAttachmentKey_DrainAfterDecoding, CFStringRef)
  73 SOFT_LINK_CONSTANT(CoreMedia, kCMSampleBufferAttachmentKey_ResetDecoderBeforeDecoding, CFStringRef)
  74 SOFT_LINK_CONSTANT(CoreMedia, kCMSampleBufferAttachmentKey_EmptyMedia, CFStringRef)
  75 SOFT_LINK_CONSTANT(CoreMedia, kCMSampleBufferAttachmentKey_DisplayEmptyMediaImmediately, CFStringRef)
  76
  77 SOFT_LINK_CONSTANT(AVFoundation, AVMediaCharacteristicVisual, NSString*)
  78 SOFT_LINK_CONSTANT(AVFoundation, AVMediaCharacteristicAudible, NSString*)
  79 SOFT_LINK_CONSTANT(AVFoundation, AVMediaCharacteristicLegible, NSString*)
  80
  81 SOFT_LINK(CoreMedia, CMFormatDescriptionGetMediaType, CMMediaType, (CMFormatDescriptionRef desc), (desc))
  82 SOFT_LINK(CoreMedia, CMSampleBufferCreate, OSStatus, (CFAllocatorRef allocator, CMBlockBufferRef dataBuffer, Boolean dataReady, CMSampleBufferMakeDataReadyCallback makeDataReadyCallback, void *makeDataReadyRefcon, CMFormatDescriptionRef formatDescription, CMItemCount numSamples, CMItemCount numSampleTimingEntries, const CMSampleTimingInfo *sampleTimingArray, CMItemCount numSampleSizeEntries, const size_t *sampleSizeArray, CMSampleBufferRef *sBufOut), (allocator, dataBuffer, dataReady, makeDataReadyCallback, makeDataReadyRefcon, formatDescription, numSamples, numSampleTimingEntries, sampleTimingArray, numSampleSizeEntries, sampleSizeArray, sBufOut))
  83 SOFT_LINK(CoreMedia, CMSampleBufferCreateCopy, OSStatus, (CFAllocatorRef allocator, CMSampleBufferRef sbuf, CMSampleBufferRef *sbufCopyOut), (allocator, sbuf, sbufCopyOut))
  84 SOFT_LINK(CoreMedia, CMSampleBufferCallForEachSample, OSStatus, (CMSampleBufferRef sbuf, OSStatus (*callback)( CMSampleBufferRef sampleBuffer, CMItemCount index, void *refcon), void *refcon), (sbuf, callback, refcon))
  85 SOFT_LINK(CoreMedia, CMSampleBufferGetDecodeTimeStamp, CMTime, (CMSampleBufferRef sbuf), (sbuf))
  86 SOFT_LINK(CoreMedia, CMSampleBufferGetDuration, CMTime, (CMSampleBufferRef sbuf), (sbuf))
  87 SOFT_LINK(CoreMedia, CMSampleBufferGetPresentationTimeStamp, CMTime, (CMSampleBufferRef sbuf), (sbuf))
  88 SOFT_LINK(CoreMedia, CMSampleBufferGetSampleAttachmentsArray, CFArrayRef, (CMSampleBufferRef sbuf, Boolean createIfNecessary), (sbuf, createIfNecessary))
  89 SOFT_LINK(CoreMedia, CMFormatDescriptionGetMediaSubType, FourCharCode, (CMFormatDescriptionRef desc), (desc))
  90 SOFT_LINK(CoreMedia, CMSetAttachment, void, (CMAttachmentBearerRef target, CFStringRef key, CFTypeRef value, CMAttachmentMode attachmentMode), (target, key, value, attachmentMode))
  91
  92 #define AVMediaTypeVideo getAVMediaTypeVideo()
  93 #define AVMediaTypeAudio getAVMediaTypeAudio()
  94 #define AVMediaTypeText getAVMediaTypeText()
  95 #define kCMTimeZero getkCMTimeZero()
  96 #define kCMTimeInvalid getkCMTimeInvalid()
  97 #define kCMSampleAttachmentKey_NotSync getkCMSampleAttachmentKey_NotSync()
  98 #define kCMSampleAttachmentKey_DoNotDisplay getkCMSampleAttachmentKey_DoNotDisplay()
  99 #define kCMSampleBufferAttachmentKey_ResetDecoderBeforeDecoding getkCMSampleBufferAttachmentKey_ResetDecoderBeforeDecoding()
 100 #define kCMSampleBufferAttachmentKey_DrainAfterDecoding getkCMSampleBufferAttachmentKey_DrainAfterDecoding()
 101 #define kCMSampleBufferAttachmentKey_EmptyMedia getkCMSampleBufferAttachmentKey_EmptyMedia()
 102 #define kCMSampleBufferAttachmentKey_DisplayEmptyMediaImmediately getkCMSampleBufferAttachmentKey_DisplayEmptyMediaImmediately()
 103
 104 #define AVMediaCharacteristicVisual getAVMediaCharacteristicVisual()
 105 #define AVMediaCharacteristicAudible getAVMediaCharacteristicAudible()
 106 #define AVMediaCharacteristicLegible getAVMediaCharacteristicLegible()
 107
 108 #pragma mark -
 109 #pragma mark AVStreamDataParser
 110 @class AVStreamDataParserInternal;
 111
 112 NS_CLASS_AVAILABLE(TBD, TBD)
 113 @interface AVStreamDataParser : NSObject
 114 - (void)setDelegate:(id)delegate;
 115 - (void)appendStreamData:(NSData *)data;
 116 - (void)setShouldProvideMediaData:(BOOL)shouldProvideMediaData forTrackID:(CMPersistentTrackID)trackID;
 117 - (BOOL)shouldProvideMediaDataForTrackID:(CMPersistentTrackID)trackID;
 118 @end
 119
 120 #pragma mark -
 121 #pragma mark WebAVStreamDataParserListener
 122
 123 @interface WebAVStreamDataParserListener : NSObject {
 124     WebCore::SourceBufferPrivateAVFObjC* _parent;
 125     AVStreamDataParser* _parser;
 126 }
 127 - (id)initWithParser:(AVStreamDataParser*)parser parent:(WebCore::SourceBufferPrivateAVFObjC*)parent;
 128 @end
 129
 130 @implementation WebAVStreamDataParserListener
 131 - (id)initWithParser:(AVStreamDataParser*)parser parent:(WebCore::SourceBufferPrivateAVFObjC*)parent
 132 {
 133     self = [super init];
 134     if (!self)
 135         return nil;
 136
 137     ASSERT(parent);
 138     _parent = parent;
 139     _parser = parser;
 140     [_parser setDelegate:self];
 141     return self;
 142 }
 143
 144 - (void)dealloc
 145 {
 146     [_parser setDelegate:nil];
 147     [super dealloc];
 148 }
 149
 150 - (void)streamDataParser:(AVStreamDataParser *)streamDataParser didParseStreamDataAsAsset:(AVAsset *)asset
 151 {
 152 #if ASSERT_DISABLED
 153     UNUSED_PARAM(streamDataParser);
 154 #endif
 155     ASSERT(streamDataParser == _parser);
 156     _parent->didParseStreamDataAsAsset(asset);
 157 }
 158
 159 - (void)streamDataParser:(AVStreamDataParser *)streamDataParser didFailToParseStreamDataWithError:(NSError *)error
 160 {
 161 #if ASSERT_DISABLED
 162     UNUSED_PARAM(streamDataParser);
 163 #endif
 164     ASSERT(streamDataParser == _parser);
 165     _parent->didFailToParseStreamDataWithError(error);
 166 }
 167
 168 - (void)streamDataParser:(AVStreamDataParser *)streamDataParser didProvideMediaData:(CMSampleBufferRef)mediaData forTrackID:(CMPersistentTrackID)trackID mediaType:(NSString *)mediaType flags:(NSUInteger)flags
 169 {
 170 #if ASSERT_DISABLED
 171     UNUSED_PARAM(streamDataParser);
 172 #endif
 173     ASSERT(streamDataParser == _parser);
 174     _parent->didProvideMediaDataForTrackID(trackID, mediaData, mediaType, flags);
 175 }
 176
 177 - (void)streamDataParser:(AVStreamDataParser *)streamDataParser didReachEndOfTrackWithTrackID:(CMPersistentTrackID)trackID mediaType:(NSString *)mediaType
 178 {
 179 #if ASSERT_DISABLED
 180     UNUSED_PARAM(streamDataParser);
 181 #endif
 182     ASSERT(streamDataParser == _parser);
 183     _parent->didReachEndOfTrackWithTrackID(trackID, mediaType);
 184 }
 185 @end
 186
 187 namespace WebCore {
 188
 189 #pragma mark -
 190 #pragma mark MediaSampleAVFObjC
 191
 192 class MediaSampleAVFObjC FINAL : public MediaSample {
 193 public:
 194     static RefPtr<MediaSampleAVFObjC> create(CMSampleBufferRef sample, int trackID) { return adoptRef(new MediaSampleAVFObjC(sample, trackID)); }
 195     virtual ~MediaSampleAVFObjC() { }
 196
 197     virtual MediaTime presentationTime() const OVERRIDE { return toMediaTime(CMSampleBufferGetPresentationTimeStamp(m_sample.get())); }
 198     virtual MediaTime decodeTime() const OVERRIDE { return toMediaTime(CMSampleBufferGetDecodeTimeStamp(m_sample.get())); }
 199     virtual MediaTime duration() const OVERRIDE { return toMediaTime(CMSampleBufferGetDuration(m_sample.get())); }
 200     virtual AtomicString trackID() const OVERRIDE { return m_id; }
 201
 202     virtual SampleFlags flags() const OVERRIDE;
 203     virtual PlatformSample platformSample() OVERRIDE;
 204
 205 protected:
 206     MediaSampleAVFObjC(CMSampleBufferRef sample, int trackID)
 207         : m_sample(sample)
 208         , m_id(String::format("%d", trackID))
 209     {
 210     }
 211
 212     RetainPtr<CMSampleBufferRef> m_sample;
 213     AtomicString m_id;
 214 };
 215
 216 PlatformSample MediaSampleAVFObjC::platformSample()
 217 {
 218     PlatformSample sample = { PlatformSample::CMSampleBufferType, { .cmSampleBuffer = m_sample.get() } };
 219     return sample;
 220 }
 221
 222 static bool CMSampleBufferIsRandomAccess(CMSampleBufferRef sample)
 223 {
 224     CFArrayRef attachments = CMSampleBufferGetSampleAttachmentsArray(sample, false);
 225     for (CFIndex i = 0, count = CFArrayGetCount(attachments); i < count; ++i) {
 226         CFDictionaryRef attachmentDict = (CFDictionaryRef)CFArrayGetValueAtIndex(attachments, i);
 227         if (!CFDictionaryContainsKey(attachmentDict, kCMSampleAttachmentKey_NotSync))
 228             return true;
 229     }
 230     return false;
 231 }
 232
 233 MediaSample::SampleFlags MediaSampleAVFObjC::flags() const
 234 {
 235     int returnValue = MediaSample::None;
 236
 237     if (CMSampleBufferIsRandomAccess(m_sample.get()))
 238         returnValue |= MediaSample::IsSync;
 239
 240     return SampleFlags(returnValue);
 241 }
 242
 243 #pragma mark -
 244 #pragma mark MediaDescriptionAVFObjC
 245
 246 class MediaDescriptionAVFObjC FINAL : public MediaDescription {
 247 public:
 248     static RefPtr<MediaDescriptionAVFObjC> create(AVAssetTrack* track) { return adoptRef(new MediaDescriptionAVFObjC(track)); }
 249     virtual ~MediaDescriptionAVFObjC() { }
 250
 251     virtual AtomicString codec() const OVERRIDE { return m_codec; }
 252     virtual bool isVideo() const OVERRIDE { return m_isVideo; }
 253     virtual bool isAudio() const OVERRIDE { return m_isAudio; }
 254     virtual bool isText() const OVERRIDE { return m_isText; }
 255
 256 protected:
 257     MediaDescriptionAVFObjC(AVAssetTrack* track)
 258         : m_isVideo([track hasMediaCharacteristic:AVMediaCharacteristicVisual])
 259         , m_isAudio([track hasMediaCharacteristic:AVMediaCharacteristicAudible])
 260         , m_isText([track hasMediaCharacteristic:AVMediaCharacteristicLegible])
 261     {
 262         NSArray* formatDescriptions = [track formatDescriptions];
 263         CMFormatDescriptionRef description = [formatDescriptions count] ? (CMFormatDescriptionRef)[formatDescriptions objectAtIndex:0] : 0;
 264         if (description) {
 265             FourCharCode codec = CMFormatDescriptionGetMediaSubType(description);
 266             m_codec = AtomicString(reinterpret_cast<LChar*>(&codec), 4);
 267         }
 268     }
 269
 270     AtomicString m_codec;
 271     bool m_isVideo;
 272     bool m_isAudio;
 273     bool m_isText;
 274 };
 275
 276 #pragma mark -
 277 #pragma mark SourceBufferPrivateAVFObjC
 278
 279 RefPtr<SourceBufferPrivateAVFObjC> SourceBufferPrivateAVFObjC::create(MediaSourcePrivateAVFObjC* parent)
 280 {
 281     return adoptRef(new SourceBufferPrivateAVFObjC(parent));
 282 }
 283
 284 SourceBufferPrivateAVFObjC::SourceBufferPrivateAVFObjC(MediaSourcePrivateAVFObjC* parent)
 285     : m_parser(adoptNS([[getAVStreamDataParserClass() alloc] init]))
 286     , m_delegate(adoptNS([[WebAVStreamDataParserListener alloc] initWithParser:m_parser.get() parent:this]))
 287     , m_mediaSource(parent)
 288     , m_client(0)
 289     , m_parsingSucceeded(true)
 290 {
 291 }
 292
 293 SourceBufferPrivateAVFObjC::~SourceBufferPrivateAVFObjC()
 294 {
 295     if (m_displayLayer) {
 296         if (m_mediaSource)
 297             m_mediaSource->player()->removeDisplayLayer(m_displayLayer.get());
 298         [m_displayLayer flushAndRemoveImage];
 299         [m_displayLayer stopRequestingMediaData];
 300         m_displayLayer = nullptr;
 301     }
 302 }
 303
 304 void SourceBufferPrivateAVFObjC::didParseStreamDataAsAsset(AVAsset* asset)
 305 {
 306     LOG(Media, "SourceBufferPrivateAVFObjC::didParseStreamDataAsAsset(%p)", this);
 307
 308     m_asset = asset;
 309
 310     SourceBufferPrivateClient::InitializationSegment segment;
 311     segment.duration = toMediaTime([m_asset duration]);
 312
 313     for (AVAssetTrack* track in [m_asset tracks]) {
 314         if ([track hasMediaCharacteristic:AVMediaCharacteristicVisual]) {
 315             SourceBufferPrivateClient::InitializationSegment::VideoTrackInformation info;
 316             info.track = VideoTrackPrivateMediaSourceAVFObjC::create(track, this);
 317             info.description = MediaDescriptionAVFObjC::create(track);
 318             segment.videoTracks.append(info);
 319         } else if ([track hasMediaCharacteristic:AVMediaCharacteristicAudible]) {
 320             SourceBufferPrivateClient::InitializationSegment::AudioTrackInformation info;
 321             info.track = AudioTrackPrivateMediaSourceAVFObjC::create(track, this);
 322             info.description = MediaDescriptionAVFObjC::create(track);
 323             segment.audioTracks.append(info);
 324         }
 325
 326         // FIXME(125161): Add TextTrack support
 327     }
 328
 329     if (m_client)
 330         m_client->sourceBufferPrivateDidReceiveInitializationSegment(this, segment);
 331 }
 332
 333 void SourceBufferPrivateAVFObjC::didFailToParseStreamDataWithError(NSError* error)
 334 {
 335 #if LOG_DISABLED
 336     UNUSED_PARAM(error);
 337 #endif
 338     LOG(Media, "SourceBufferPrivateAVFObjC::didFailToParseStreamDataWithError(%p) - error:\"%s\"", this, String([error description]).utf8().data());
 339
 340     m_parsingSucceeded = false;
 341 }
 342
 343 struct ProcessCodedFrameInfo {
 344     SourceBufferPrivateAVFObjC* sourceBuffer;
 345     int trackID;
 346     const String& mediaType;
 347 };
 348
 349 static OSStatus callProcessCodedFrameForEachSample(CMSampleBufferRef sampleBuffer, CMItemCount, void *refcon)
 350 {
 351     ProcessCodedFrameInfo* info = static_cast<ProcessCodedFrameInfo*>(refcon);
 352     return info->sourceBuffer->processCodedFrame(info->trackID, sampleBuffer, info->mediaType);
 353 }
 354
 355 void SourceBufferPrivateAVFObjC::didProvideMediaDataForTrackID(int trackID, CMSampleBufferRef sampleBuffer, const String& mediaType, unsigned flags)
 356 {
 357     UNUSED_PARAM(flags);
 358
 359     ProcessCodedFrameInfo info = {this, trackID, mediaType};
 360     CMSampleBufferCallForEachSample(sampleBuffer, &callProcessCodedFrameForEachSample, &info);
 361 }
 362
 363 bool SourceBufferPrivateAVFObjC::processCodedFrame(int trackID, CMSampleBufferRef sampleBuffer, const String&)
 364 {
 365     if (m_client)
 366         m_client->sourceBufferPrivateDidReceiveSample(this, MediaSampleAVFObjC::create(sampleBuffer, trackID));
 367
 368     return true;
 369 }
 370
 371 void SourceBufferPrivateAVFObjC::didReachEndOfTrackWithTrackID(int trackID, const String& mediaType)
 372 {
 373     UNUSED_PARAM(mediaType);
 374     UNUSED_PARAM(trackID);
 375     notImplemented();
 376 }
 377
 378 void SourceBufferPrivateAVFObjC::setClient(SourceBufferPrivateClient* client)
 379 {
 380     m_client = client;
 381 }
 382
 383 SourceBufferPrivate::AppendResult SourceBufferPrivateAVFObjC::append(const unsigned char* data, unsigned length)
 384 {
 385     m_parsingSucceeded = true;
 386
 387     LOG(Media, "SourceBufferPrivateAVFObjC::append(%p) - data:%p, length:%d", this, data, length);
 388     [m_parser appendStreamData:[NSData dataWithBytes:data length:length]];
 389
 390     if (m_parsingSucceeded && m_mediaSource)
 391         m_mediaSource->player()->setLoadingProgresssed(true);
 392
 393     return m_parsingSucceeded ? AppendSucceeded : ParsingFailed;
 394 }
 395
 396 void SourceBufferPrivateAVFObjC::abort()
 397 {
 398     notImplemented();
 399 }
 400
 401 void SourceBufferPrivateAVFObjC::removedFromMediaSource()
 402 {
 403     if (m_displayLayer) {
 404         if (m_mediaSource)
 405             m_mediaSource->player()->removeDisplayLayer(m_displayLayer.get());
 406         [m_displayLayer flush];
 407         [m_displayLayer stopRequestingMediaData];
 408         m_displayLayer = nullptr;
 409     }
 410
 411     if (m_mediaSource)
 412         m_mediaSource->removeSourceBuffer(this);
 413 }
 414
 415 MediaPlayer::ReadyState SourceBufferPrivateAVFObjC::readyState() const
 416 {
 417     return m_mediaSource ? m_mediaSource->player()->readyState() : MediaPlayer::HaveNothing;
 418 }
 419
 420 void SourceBufferPrivateAVFObjC::setReadyState(MediaPlayer::ReadyState readyState)
 421 {
 422     if (m_mediaSource)
 423         m_mediaSource->player()->setReadyState(readyState);
 424 }
 425
 426 void SourceBufferPrivateAVFObjC::evictCodedFrames()
 427 {
 428     notImplemented();
 429 }
 430
 431 bool SourceBufferPrivateAVFObjC::isFull()
 432 {
 433     notImplemented();
 434     return false;
 435 }
 436
 437
 438 bool SourceBufferPrivateAVFObjC::hasVideo() const
 439 {
 440     if (!m_client)
 441         return false;
 442
 443     return m_client->sourceBufferPrivateHasVideo(this);
 444 }
 445
 446 bool SourceBufferPrivateAVFObjC::hasAudio() const
 447 {
 448     if (!m_client)
 449         return false;
 450
 451     return m_client->sourceBufferPrivateHasAudio(this);
 452 }
 453
 454 void SourceBufferPrivateAVFObjC::trackDidChangeEnabled(VideoTrackPrivateMediaSourceAVFObjC* track)
 455 {
 456     int trackID = track->trackID();
 457     if (!track->selected() && m_enabledVideoTrackID == trackID) {
 458         m_enabledVideoTrackID = -1;
 459         [m_parser setShouldProvideMediaData:NO forTrackID:trackID];
 460         if (m_mediaSource)
 461             m_mediaSource->player()->removeDisplayLayer(m_displayLayer.get());
 462     } else if (track->selected()) {
 463         m_enabledVideoTrackID = trackID;
 464         [m_parser setShouldProvideMediaData:YES forTrackID:trackID];
 465         if (!m_displayLayer) {
 466             m_displayLayer = [[getAVSampleBufferDisplayLayerClass() alloc] init];
 467             [m_displayLayer requestMediaDataWhenReadyOnQueue:dispatch_get_main_queue() usingBlock:^{
 468                 if (m_client)
 469                     m_client->sourceBufferPrivateDidBecomeReadyForMoreSamples(this);
 470             }];
 471             if (m_mediaSource)
 472                 m_mediaSource->player()->addDisplayLayer(m_displayLayer.get());
 473         }
 474     }
 475 }
 476
 477 void SourceBufferPrivateAVFObjC::trackDidChangeEnabled(AudioTrackPrivateMediaSourceAVFObjC*)
 478 {
 479     // No-op.
 480 }
 481
 482 static RetainPtr<CMSampleBufferRef> createNonDisplayingCopy(CMSampleBufferRef sampleBuffer)
 483 {
 484     CMSampleBufferRef newSampleBuffer = 0;
 485     CMSampleBufferCreateCopy(kCFAllocatorDefault, sampleBuffer, &newSampleBuffer);
 486     if (!newSampleBuffer)
 487         return sampleBuffer;
 488
 489     CFArrayRef attachmentsArray = CMSampleBufferGetSampleAttachmentsArray(newSampleBuffer, true);
 490     for (CFIndex i = 0; i < CFArrayGetCount(attachmentsArray); ++i) {
 491         CFMutableDictionaryRef attachments = (CFMutableDictionaryRef)CFArrayGetValueAtIndex(attachmentsArray, i);
 492         CFDictionarySetValue(attachments, kCMSampleAttachmentKey_DoNotDisplay, kCFBooleanTrue);
 493     }
 494
 495     return adoptCF(newSampleBuffer);
 496 }
 497
 498 void SourceBufferPrivateAVFObjC::flushAndEnqueueNonDisplayingSamples(Vector<RefPtr<MediaSample>> mediaSamples, AtomicString trackID)
 499 {
 500     if (trackID.toInt() != m_enabledVideoTrackID)
 501         return;
 502
 503     LOG(Media, "SourceBufferPrivateAVFObjC::flushAndEnqueueNonDisplayingSamples(%p) samples: %d samples, trackId: %d", this, mediaSamples.size(), trackID.toInt());
 504
 505     [m_displayLayer flush];
 506
 507     for (auto it = mediaSamples.begin(), end = mediaSamples.end(); it != end; ++it) {
 508         RefPtr<MediaSample>& mediaSample = *it;
 509
 510         PlatformSample platformSample = mediaSample->platformSample();
 511         ASSERT(platformSample.type == PlatformSample::CMSampleBufferType);
 512
 513         RetainPtr<CMSampleBufferRef> sampleBuffer = createNonDisplayingCopy(platformSample.sample.cmSampleBuffer);
 514
 515         [m_displayLayer enqueueSampleBuffer:sampleBuffer.get()];
 516     }
 517
 518     if (m_mediaSource)
 519         m_mediaSource->player()->setHasAvailableVideoFrame(false);
 520 }
 521
 522 void SourceBufferPrivateAVFObjC::enqueueSample(PassRefPtr<MediaSample> prpMediaSample, AtomicString trackID)
 523 {
 524     if (trackID.toInt() != m_enabledVideoTrackID)
 525         return;
 526
 527     RefPtr<MediaSample> mediaSample = prpMediaSample;
 528
 529     PlatformSample platformSample = mediaSample->platformSample();
 530     if (platformSample.type != PlatformSample::CMSampleBufferType)
 531         return;
 532
 533     [m_displayLayer enqueueSampleBuffer:platformSample.sample.cmSampleBuffer];
 534     if (m_mediaSource)
 535         m_mediaSource->player()->setHasAvailableVideoFrame(true);
 536 }
 537
 538 bool SourceBufferPrivateAVFObjC::isReadyForMoreSamples()
 539 {
 540     return [m_displayLayer isReadyForMoreMediaData];
 541 }
 542
 543 void SourceBufferPrivateAVFObjC::setActive(bool isActive)
 544 {
 545     if (m_mediaSource)
 546         m_mediaSource->sourceBufferPrivateDidChangeActiveState(this, isActive);
 547 }
 548
 549 MediaTime SourceBufferPrivateAVFObjC::fastSeekTimeForMediaTime(MediaTime time, MediaTime negativeThreshold, MediaTime positiveThreshold)
 550 {
 551     if (m_client)
 552         return m_client->sourceBufferPrivateFastSeekTimeForMediaTime(this, time, negativeThreshold, positiveThreshold);
 553     return time;
 554 }
 555
 556 void SourceBufferPrivateAVFObjC::seekToTime(MediaTime time)
 557 {
 558     if (m_client)
 559         m_client->sourceBufferPrivateSeekToTime(this, time);
 560 }
 561
 562 }
 563
 564 #endif // ENABLE(MEDIA_SOURCE) && USE(AVFOUNDATION)