/
GPUImageMovieWriter.m
executable file
·1016 lines (853 loc) · 37.4 KB
/
GPUImageMovieWriter.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#import "GPUImageMovieWriter.h"
#import "GPUImageContext.h"
#import "GLProgram.h"
#import "GPUImageFilter.h"
NSString *const kGPUImageColorSwizzlingFragmentShaderString = SHADER_STRING
(
varying highp vec2 textureCoordinate;
uniform sampler2D inputImageTexture;
void main()
{
gl_FragColor = texture2D(inputImageTexture, textureCoordinate).bgra;
}
);
@interface GPUImageMovieWriter ()
{
GLuint movieFramebuffer, movieRenderbuffer;
GLProgram *colorSwizzlingProgram;
GLint colorSwizzlingPositionAttribute, colorSwizzlingTextureCoordinateAttribute;
GLint colorSwizzlingInputTextureUniform;
GPUImageFramebuffer *firstInputFramebuffer;
BOOL discont;
CMTime startTime, previousFrameTime, previousAudioTime;
CMTime offsetTime;
dispatch_queue_t audioQueue, videoQueue;
BOOL audioEncodingIsFinished, videoEncodingIsFinished;
BOOL isRecording;
}
// Movie recording
- (void)initializeMovieWithOutputSettings:(NSMutableDictionary *)outputSettings;
// Frame rendering
- (void)createDataFBO;
- (void)destroyDataFBO;
- (void)setFilterFBO;
- (void)renderAtInternalSizeUsingFramebuffer:(GPUImageFramebuffer *)inputFramebufferToUse;
@end
@implementation GPUImageMovieWriter
@synthesize hasAudioTrack = _hasAudioTrack;
@synthesize encodingLiveVideo = _encodingLiveVideo;
@synthesize shouldPassthroughAudio = _shouldPassthroughAudio;
@synthesize completionBlock;
@synthesize failureBlock;
@synthesize videoInputReadyCallback;
@synthesize audioInputReadyCallback;
@synthesize enabled;
@synthesize shouldInvalidateAudioSampleWhenDone = _shouldInvalidateAudioSampleWhenDone;
@synthesize paused = _paused;
@synthesize movieWriterContext = _movieWriterContext;
@synthesize delegate = _delegate;
#pragma mark -
#pragma mark Initialization and teardown
- (id)initWithMovieURL:(NSURL *)newMovieURL size:(CGSize)newSize;
{
return [self initWithMovieURL:newMovieURL size:newSize fileType:AVFileTypeQuickTimeMovie outputSettings:nil];
}
- (id)initWithMovieURL:(NSURL *)newMovieURL size:(CGSize)newSize fileType:(NSString *)newFileType outputSettings:(NSMutableDictionary *)outputSettings;
{
if (!(self = [super init]))
{
return nil;
}
_shouldInvalidateAudioSampleWhenDone = NO;
self.enabled = YES;
alreadyFinishedRecording = NO;
videoEncodingIsFinished = NO;
audioEncodingIsFinished = NO;
discont = NO;
videoSize = newSize;
movieURL = newMovieURL;
fileType = newFileType;
startTime = kCMTimeInvalid;
_encodingLiveVideo = [[outputSettings objectForKey:@"EncodingLiveVideo"] isKindOfClass:[NSNumber class]] ? [[outputSettings objectForKey:@"EncodingLiveVideo"] boolValue] : YES;
previousFrameTime = kCMTimeNegativeInfinity;
previousAudioTime = kCMTimeNegativeInfinity;
inputRotation = kGPUImageNoRotation;
_movieWriterContext = [[GPUImageContext alloc] init];
[_movieWriterContext useSharegroup:[[[GPUImageContext sharedImageProcessingContext] context] sharegroup]];
runSynchronouslyOnContextQueue(_movieWriterContext, ^{
[_movieWriterContext useAsCurrentContext];
if ([GPUImageContext supportsFastTextureUpload])
{
colorSwizzlingProgram = [_movieWriterContext programForVertexShaderString:kGPUImageVertexShaderString fragmentShaderString:kGPUImagePassthroughFragmentShaderString];
}
else
{
colorSwizzlingProgram = [_movieWriterContext programForVertexShaderString:kGPUImageVertexShaderString fragmentShaderString:kGPUImageColorSwizzlingFragmentShaderString];
}
if (!colorSwizzlingProgram.initialized)
{
[colorSwizzlingProgram addAttribute:@"position"];
[colorSwizzlingProgram addAttribute:@"inputTextureCoordinate"];
if (![colorSwizzlingProgram link])
{
NSString *progLog = [colorSwizzlingProgram programLog];
NSLog(@"Program link log: %@", progLog);
NSString *fragLog = [colorSwizzlingProgram fragmentShaderLog];
NSLog(@"Fragment shader compile log: %@", fragLog);
NSString *vertLog = [colorSwizzlingProgram vertexShaderLog];
NSLog(@"Vertex shader compile log: %@", vertLog);
colorSwizzlingProgram = nil;
NSAssert(NO, @"Filter shader link failed");
}
}
colorSwizzlingPositionAttribute = [colorSwizzlingProgram attributeIndex:@"position"];
colorSwizzlingTextureCoordinateAttribute = [colorSwizzlingProgram attributeIndex:@"inputTextureCoordinate"];
colorSwizzlingInputTextureUniform = [colorSwizzlingProgram uniformIndex:@"inputImageTexture"];
[_movieWriterContext setContextShaderProgram:colorSwizzlingProgram];
glEnableVertexAttribArray(colorSwizzlingPositionAttribute);
glEnableVertexAttribArray(colorSwizzlingTextureCoordinateAttribute);
});
[self initializeMovieWithOutputSettings:outputSettings];
return self;
}
- (void)dealloc;
{
[self destroyDataFBO];
#if !OS_OBJECT_USE_OBJC
if( audioQueue != NULL )
{
dispatch_release(audioQueue);
}
if( videoQueue != NULL )
{
dispatch_release(videoQueue);
}
#endif
}
#pragma mark -
#pragma mark Movie recording
- (void)initializeMovieWithOutputSettings:(NSDictionary *)outputSettings;
{
isRecording = NO;
self.enabled = YES;
NSError *error = nil;
assetWriter = [[AVAssetWriter alloc] initWithURL:movieURL fileType:fileType error:&error];
if (error != nil)
{
NSLog(@"Error: %@", error);
if (failureBlock)
{
failureBlock(error);
}
else
{
if(self.delegate && [self.delegate respondsToSelector:@selector(movieRecordingFailedWithError:)])
{
[self.delegate movieRecordingFailedWithError:error];
}
}
}
// Set this to make sure that a functional movie is produced, even if the recording is cut off mid-stream. Only the last second should be lost in that case.
assetWriter.movieFragmentInterval = CMTimeMakeWithSeconds(1.0, 1000);
// use default output settings if none specified
if (outputSettings == nil)
{
NSMutableDictionary *settings = [[NSMutableDictionary alloc] init];
[settings setObject:AVVideoCodecH264 forKey:AVVideoCodecKey];
[settings setObject:[NSNumber numberWithInt:videoSize.width] forKey:AVVideoWidthKey];
[settings setObject:[NSNumber numberWithInt:videoSize.height] forKey:AVVideoHeightKey];
outputSettings = settings;
}
// custom output settings specified
else
{
__unused NSString *videoCodec = [outputSettings objectForKey:AVVideoCodecKey];
__unused NSNumber *width = [outputSettings objectForKey:AVVideoWidthKey];
__unused NSNumber *height = [outputSettings objectForKey:AVVideoHeightKey];
NSAssert(videoCodec && width && height, @"OutputSettings is missing required parameters.");
if( [outputSettings objectForKey:@"EncodingLiveVideo"] ) {
NSMutableDictionary *tmp = [outputSettings mutableCopy];
[tmp removeObjectForKey:@"EncodingLiveVideo"];
outputSettings = tmp;
}
}
/*
NSDictionary *videoCleanApertureSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:videoSize.width], AVVideoCleanApertureWidthKey,
[NSNumber numberWithInt:videoSize.height], AVVideoCleanApertureHeightKey,
[NSNumber numberWithInt:0], AVVideoCleanApertureHorizontalOffsetKey,
[NSNumber numberWithInt:0], AVVideoCleanApertureVerticalOffsetKey,
nil];
NSDictionary *videoAspectRatioSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:3], AVVideoPixelAspectRatioHorizontalSpacingKey,
[NSNumber numberWithInt:3], AVVideoPixelAspectRatioVerticalSpacingKey,
nil];
NSMutableDictionary * compressionProperties = [[NSMutableDictionary alloc] init];
[compressionProperties setObject:videoCleanApertureSettings forKey:AVVideoCleanApertureKey];
[compressionProperties setObject:videoAspectRatioSettings forKey:AVVideoPixelAspectRatioKey];
[compressionProperties setObject:[NSNumber numberWithInt: 2000000] forKey:AVVideoAverageBitRateKey];
[compressionProperties setObject:[NSNumber numberWithInt: 16] forKey:AVVideoMaxKeyFrameIntervalKey];
[compressionProperties setObject:AVVideoProfileLevelH264Main31 forKey:AVVideoProfileLevelKey];
[outputSettings setObject:compressionProperties forKey:AVVideoCompressionPropertiesKey];
*/
assetWriterVideoInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:outputSettings];
assetWriterVideoInput.expectsMediaDataInRealTime = _encodingLiveVideo;
// You need to use BGRA for the video in order to get realtime encoding. I use a color-swizzling shader to line up glReadPixels' normal RGBA output with the movie input's BGRA.
NSDictionary *sourcePixelBufferAttributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:kCVPixelFormatType_32BGRA], kCVPixelBufferPixelFormatTypeKey,
[NSNumber numberWithInt:videoSize.width], kCVPixelBufferWidthKey,
[NSNumber numberWithInt:videoSize.height], kCVPixelBufferHeightKey,
nil];
// NSDictionary *sourcePixelBufferAttributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:kCVPixelFormatType_32ARGB], kCVPixelBufferPixelFormatTypeKey,
// nil];
assetWriterPixelBufferInput = [AVAssetWriterInputPixelBufferAdaptor assetWriterInputPixelBufferAdaptorWithAssetWriterInput:assetWriterVideoInput sourcePixelBufferAttributes:sourcePixelBufferAttributesDictionary];
[assetWriter addInput:assetWriterVideoInput];
}
- (void)setEncodingLiveVideo:(BOOL) value
{
_encodingLiveVideo = value;
if (isRecording) {
NSAssert(NO, @"Can not change Encoding Live Video while recording");
}
else
{
assetWriterVideoInput.expectsMediaDataInRealTime = _encodingLiveVideo;
assetWriterAudioInput.expectsMediaDataInRealTime = _encodingLiveVideo;
}
}
- (void)startRecording;
{
alreadyFinishedRecording = NO;
startTime = kCMTimeInvalid;
runSynchronouslyOnContextQueue(_movieWriterContext, ^{
if (audioInputReadyCallback == NULL)
{
[assetWriter startWriting];
}
});
isRecording = YES;
// [assetWriter startSessionAtSourceTime:kCMTimeZero];
}
- (void)startRecordingInOrientation:(CGAffineTransform)orientationTransform;
{
assetWriterVideoInput.transform = orientationTransform;
[self startRecording];
}
- (void)cancelRecording;
{
if (assetWriter.status == AVAssetWriterStatusCompleted)
{
return;
}
isRecording = NO;
runSynchronouslyOnContextQueue(_movieWriterContext, ^{
alreadyFinishedRecording = YES;
if( assetWriter.status == AVAssetWriterStatusWriting && ! videoEncodingIsFinished )
{
videoEncodingIsFinished = YES;
[assetWriterVideoInput markAsFinished];
}
if( assetWriter.status == AVAssetWriterStatusWriting && ! audioEncodingIsFinished )
{
audioEncodingIsFinished = YES;
[assetWriterAudioInput markAsFinished];
}
[assetWriter cancelWriting];
});
}
- (void)finishRecording;
{
[self finishRecordingWithCompletionHandler:NULL];
}
- (void)finishRecordingWithCompletionHandler:(void (^)(void))handler;
{
runSynchronouslyOnContextQueue(_movieWriterContext, ^{
isRecording = NO;
if (assetWriter.status == AVAssetWriterStatusCompleted || assetWriter.status == AVAssetWriterStatusCancelled || assetWriter.status == AVAssetWriterStatusUnknown)
{
if (handler)
runAsynchronouslyOnContextQueue(_movieWriterContext, handler);
return;
}
if( assetWriter.status == AVAssetWriterStatusWriting && ! videoEncodingIsFinished )
{
videoEncodingIsFinished = YES;
[assetWriterVideoInput markAsFinished];
}
if( assetWriter.status == AVAssetWriterStatusWriting && ! audioEncodingIsFinished )
{
audioEncodingIsFinished = YES;
[assetWriterAudioInput markAsFinished];
}
#if (!defined(__IPHONE_6_0) || (__IPHONE_OS_VERSION_MAX_ALLOWED < __IPHONE_6_0))
// Not iOS 6 SDK
[assetWriter finishWriting];
if (handler)
runAsynchronouslyOnContextQueue(_movieWriterContext,handler);
#else
// iOS 6 SDK
if ([assetWriter respondsToSelector:@selector(finishWritingWithCompletionHandler:)]) {
// Running iOS 6
[assetWriter finishWritingWithCompletionHandler:(handler ?: ^{ })];
}
else {
// Not running iOS 6
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
[assetWriter finishWriting];
#pragma clang diagnostic pop
if (handler)
runAsynchronouslyOnContextQueue(_movieWriterContext, handler);
}
#endif
});
}
- (void)processAudioBuffer:(CMSampleBufferRef)audioBuffer;
{
if (!isRecording || _paused)
{
return;
}
// if (_hasAudioTrack && CMTIME_IS_VALID(startTime))
if (_hasAudioTrack)
{
CFRetain(audioBuffer);
CMTime currentSampleTime = CMSampleBufferGetOutputPresentationTimeStamp(audioBuffer);
if (CMTIME_IS_INVALID(startTime))
{
runSynchronouslyOnContextQueue(_movieWriterContext, ^{
if ((audioInputReadyCallback == NULL) && (assetWriter.status != AVAssetWriterStatusWriting))
{
[assetWriter startWriting];
}
[assetWriter startSessionAtSourceTime:currentSampleTime];
startTime = currentSampleTime;
});
}
if (!assetWriterAudioInput.readyForMoreMediaData && _encodingLiveVideo)
{
NSLog(@"1: Had to drop an audio frame: %@", CFBridgingRelease(CMTimeCopyDescription(kCFAllocatorDefault, currentSampleTime)));
if (_shouldInvalidateAudioSampleWhenDone)
{
CMSampleBufferInvalidate(audioBuffer);
}
CFRelease(audioBuffer);
return;
}
if (discont) {
discont = NO;
CMTime current;
if (offsetTime.value > 0) {
current = CMTimeSubtract(currentSampleTime, offsetTime);
} else {
current = currentSampleTime;
}
CMTime offset = CMTimeSubtract(current, previousAudioTime);
if (offsetTime.value == 0) {
offsetTime = offset;
} else {
offsetTime = CMTimeAdd(offsetTime, offset);
}
}
if (offsetTime.value > 0) {
CFRelease(audioBuffer);
audioBuffer = [self adjustTime:audioBuffer by:offsetTime];
CFRetain(audioBuffer);
}
// record most recent time so we know the length of the pause
currentSampleTime = CMSampleBufferGetPresentationTimeStamp(audioBuffer);
previousAudioTime = currentSampleTime;
//if the consumer wants to do something with the audio samples before writing, let him.
if (self.audioProcessingCallback) {
//need to introspect into the opaque CMBlockBuffer structure to find its raw sample buffers.
CMBlockBufferRef buffer = CMSampleBufferGetDataBuffer(audioBuffer);
CMItemCount numSamplesInBuffer = CMSampleBufferGetNumSamples(audioBuffer);
AudioBufferList audioBufferList;
CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer(audioBuffer,
NULL,
&audioBufferList,
sizeof(audioBufferList),
NULL,
NULL,
kCMSampleBufferFlag_AudioBufferList_Assure16ByteAlignment,
&buffer
);
//passing a live pointer to the audio buffers, try to process them in-place or we might have syncing issues.
for (int bufferCount=0; bufferCount < audioBufferList.mNumberBuffers; bufferCount++) {
SInt16 *samples = (SInt16 *)audioBufferList.mBuffers[bufferCount].mData;
self.audioProcessingCallback(&samples, numSamplesInBuffer);
}
}
// NSLog(@"Recorded audio sample time: %lld, %d, %lld", currentSampleTime.value, currentSampleTime.timescale, currentSampleTime.epoch);
void(^write)() = ^() {
while( ! assetWriterAudioInput.readyForMoreMediaData && ! _encodingLiveVideo && ! audioEncodingIsFinished ) {
NSDate *maxDate = [NSDate dateWithTimeIntervalSinceNow:0.5];
//NSLog(@"audio waiting...");
[[NSRunLoop currentRunLoop] runUntilDate:maxDate];
}
if (!assetWriterAudioInput.readyForMoreMediaData)
{
NSLog(@"2: Had to drop an audio frame %@", CFBridgingRelease(CMTimeCopyDescription(kCFAllocatorDefault, currentSampleTime)));
}
else if(assetWriter.status == AVAssetWriterStatusWriting)
{
if (![assetWriterAudioInput appendSampleBuffer:audioBuffer])
NSLog(@"Problem appending audio buffer at time: %@", CFBridgingRelease(CMTimeCopyDescription(kCFAllocatorDefault, currentSampleTime)));
}
else
{
//NSLog(@"Wrote an audio frame %@", CFBridgingRelease(CMTimeCopyDescription(kCFAllocatorDefault, currentSampleTime)));
}
if (_shouldInvalidateAudioSampleWhenDone)
{
CMSampleBufferInvalidate(audioBuffer);
}
CFRelease(audioBuffer);
};
// runAsynchronouslyOnContextQueue(_movieWriterContext, write);
if( _encodingLiveVideo )
{
runAsynchronouslyOnContextQueue(_movieWriterContext, write);
}
else
{
write();
}
}
}
- (void)enableSynchronizationCallbacks;
{
if (videoInputReadyCallback != NULL)
{
if( assetWriter.status != AVAssetWriterStatusWriting )
{
[assetWriter startWriting];
}
videoQueue = dispatch_queue_create("com.sunsetlakesoftware.GPUImage.videoReadingQueue", GPUImageDefaultQueueAttribute());
[assetWriterVideoInput requestMediaDataWhenReadyOnQueue:videoQueue usingBlock:^{
if( _paused )
{
//NSLog(@"video requestMediaDataWhenReadyOnQueue paused");
// if we don't sleep, we'll get called back almost immediately, chewing up CPU
usleep(10000);
return;
}
//NSLog(@"video requestMediaDataWhenReadyOnQueue begin");
while( assetWriterVideoInput.readyForMoreMediaData && ! _paused )
{
if( videoInputReadyCallback && ! videoInputReadyCallback() && ! videoEncodingIsFinished )
{
runAsynchronouslyOnContextQueue(_movieWriterContext, ^{
if( assetWriter.status == AVAssetWriterStatusWriting && ! videoEncodingIsFinished )
{
videoEncodingIsFinished = YES;
[assetWriterVideoInput markAsFinished];
}
});
}
}
//NSLog(@"video requestMediaDataWhenReadyOnQueue end");
}];
}
if (audioInputReadyCallback != NULL)
{
audioQueue = dispatch_queue_create("com.sunsetlakesoftware.GPUImage.audioReadingQueue", GPUImageDefaultQueueAttribute());
[assetWriterAudioInput requestMediaDataWhenReadyOnQueue:audioQueue usingBlock:^{
if( _paused )
{
//NSLog(@"audio requestMediaDataWhenReadyOnQueue paused");
// if we don't sleep, we'll get called back almost immediately, chewing up CPU
usleep(10000);
return;
}
//NSLog(@"audio requestMediaDataWhenReadyOnQueue begin");
while( assetWriterAudioInput.readyForMoreMediaData && ! _paused )
{
if( audioInputReadyCallback && ! audioInputReadyCallback() && ! audioEncodingIsFinished )
{
runAsynchronouslyOnContextQueue(_movieWriterContext, ^{
if( assetWriter.status == AVAssetWriterStatusWriting && ! audioEncodingIsFinished )
{
audioEncodingIsFinished = YES;
[assetWriterAudioInput markAsFinished];
}
});
}
}
//NSLog(@"audio requestMediaDataWhenReadyOnQueue end");
}];
}
}
#pragma mark -
#pragma mark Frame rendering
- (void)createDataFBO;
{
glActiveTexture(GL_TEXTURE1);
glGenFramebuffers(1, &movieFramebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, movieFramebuffer);
if ([GPUImageContext supportsFastTextureUpload])
{
// Code originally sourced from http://allmybrain.com/2011/12/08/rendering-to-a-texture-with-ios-5-texture-cache-api/
CVPixelBufferPoolCreatePixelBuffer (NULL, [assetWriterPixelBufferInput pixelBufferPool], &renderTarget);
/* AVAssetWriter will use BT.601 conversion matrix for RGB to YCbCr conversion
* regardless of the kCVImageBufferYCbCrMatrixKey value.
* Tagging the resulting video file as BT.601, is the best option right now.
* Creating a proper BT.709 video is not possible at the moment.
*/
CVBufferSetAttachment(renderTarget, kCVImageBufferColorPrimariesKey, kCVImageBufferColorPrimaries_ITU_R_709_2, kCVAttachmentMode_ShouldPropagate);
CVBufferSetAttachment(renderTarget, kCVImageBufferYCbCrMatrixKey, kCVImageBufferYCbCrMatrix_ITU_R_601_4, kCVAttachmentMode_ShouldPropagate);
CVBufferSetAttachment(renderTarget, kCVImageBufferTransferFunctionKey, kCVImageBufferTransferFunction_ITU_R_709_2, kCVAttachmentMode_ShouldPropagate);
CVOpenGLESTextureCacheCreateTextureFromImage (kCFAllocatorDefault, [_movieWriterContext coreVideoTextureCache], renderTarget,
NULL, // texture attributes
GL_TEXTURE_2D,
GL_RGBA, // opengl format
(int)videoSize.width,
(int)videoSize.height,
GL_BGRA, // native iOS format
GL_UNSIGNED_BYTE,
0,
&renderTexture);
glBindTexture(CVOpenGLESTextureGetTarget(renderTexture), CVOpenGLESTextureGetName(renderTexture));
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, CVOpenGLESTextureGetName(renderTexture), 0);
}
else
{
glGenRenderbuffers(1, &movieRenderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, movieRenderbuffer);
glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8_OES, (int)videoSize.width, (int)videoSize.height);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, movieRenderbuffer);
}
__unused GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
NSAssert(status == GL_FRAMEBUFFER_COMPLETE, @"Incomplete filter FBO: %d", status);
}
- (void)destroyDataFBO;
{
runSynchronouslyOnContextQueue(_movieWriterContext, ^{
[_movieWriterContext useAsCurrentContext];
if (movieFramebuffer)
{
glDeleteFramebuffers(1, &movieFramebuffer);
movieFramebuffer = 0;
}
if (movieRenderbuffer)
{
glDeleteRenderbuffers(1, &movieRenderbuffer);
movieRenderbuffer = 0;
}
if ([GPUImageContext supportsFastTextureUpload])
{
if (renderTexture)
{
CFRelease(renderTexture);
}
if (renderTarget)
{
CVPixelBufferRelease(renderTarget);
}
}
});
}
- (void)setFilterFBO;
{
if (!movieFramebuffer)
{
[self createDataFBO];
}
glBindFramebuffer(GL_FRAMEBUFFER, movieFramebuffer);
glViewport(0, 0, (int)videoSize.width, (int)videoSize.height);
}
- (void)renderAtInternalSizeUsingFramebuffer:(GPUImageFramebuffer *)inputFramebufferToUse;
{
[_movieWriterContext useAsCurrentContext];
[self setFilterFBO];
[_movieWriterContext setContextShaderProgram:colorSwizzlingProgram];
glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// This needs to be flipped to write out to video correctly
static const GLfloat squareVertices[] = {
-1.0f, -1.0f,
1.0f, -1.0f,
-1.0f, 1.0f,
1.0f, 1.0f,
};
const GLfloat *textureCoordinates = [GPUImageFilter textureCoordinatesForRotation:inputRotation];
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_2D, [inputFramebufferToUse texture]);
glUniform1i(colorSwizzlingInputTextureUniform, 4);
// NSLog(@"Movie writer framebuffer: %@", inputFramebufferToUse);
glVertexAttribPointer(colorSwizzlingPositionAttribute, 2, GL_FLOAT, 0, 0, squareVertices);
glVertexAttribPointer(colorSwizzlingTextureCoordinateAttribute, 2, GL_FLOAT, 0, 0, textureCoordinates);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glFinish();
}
#pragma mark -
#pragma mark GPUImageInput protocol
- (void)newFrameReadyAtTime:(CMTime)frameTime atIndex:(NSInteger)textureIndex;
{
if (!isRecording || _paused)
{
[firstInputFramebuffer unlock];
return;
}
if (discont) {
discont = NO;
CMTime current;
if (offsetTime.value > 0) {
current = CMTimeSubtract(frameTime, offsetTime);
} else {
current = frameTime;
}
CMTime offset = CMTimeSubtract(current, previousFrameTime);
if (offsetTime.value == 0) {
offsetTime = offset;
} else {
offsetTime = CMTimeAdd(offsetTime, offset);
}
}
if (offsetTime.value > 0) {
frameTime = CMTimeSubtract(frameTime, offsetTime);
}
// Drop frames forced by images and other things with no time constants
// Also, if two consecutive times with the same value are added to the movie, it aborts recording, so I bail on that case
if ( (CMTIME_IS_INVALID(frameTime)) || (CMTIME_COMPARE_INLINE(frameTime, ==, previousFrameTime)) || (CMTIME_IS_INDEFINITE(frameTime)) )
{
[firstInputFramebuffer unlock];
return;
}
if (CMTIME_IS_INVALID(startTime))
{
runSynchronouslyOnContextQueue(_movieWriterContext, ^{
if ((videoInputReadyCallback == NULL) && (assetWriter.status != AVAssetWriterStatusWriting))
{
[assetWriter startWriting];
}
[assetWriter startSessionAtSourceTime:frameTime];
startTime = frameTime;
});
}
GPUImageFramebuffer *inputFramebufferForBlock = firstInputFramebuffer;
glFinish();
runAsynchronouslyOnContextQueue(_movieWriterContext, ^{
if (!assetWriterVideoInput.readyForMoreMediaData && _encodingLiveVideo)
{
[inputFramebufferForBlock unlock];
NSLog(@"1: Had to drop a video frame: %@", CFBridgingRelease(CMTimeCopyDescription(kCFAllocatorDefault, frameTime)));
return;
}
// Render the frame with swizzled colors, so that they can be uploaded quickly as BGRA frames
[_movieWriterContext useAsCurrentContext];
[self renderAtInternalSizeUsingFramebuffer:inputFramebufferForBlock];
CVPixelBufferRef pixel_buffer = NULL;
if ([GPUImageContext supportsFastTextureUpload])
{
pixel_buffer = renderTarget;
CVPixelBufferLockBaseAddress(pixel_buffer, 0);
}
else
{
CVReturn status = CVPixelBufferPoolCreatePixelBuffer (NULL, [assetWriterPixelBufferInput pixelBufferPool], &pixel_buffer);
if ((pixel_buffer == NULL) || (status != kCVReturnSuccess))
{
CVPixelBufferRelease(pixel_buffer);
return;
}
else
{
CVPixelBufferLockBaseAddress(pixel_buffer, 0);
GLubyte *pixelBufferData = (GLubyte *)CVPixelBufferGetBaseAddress(pixel_buffer);
glReadPixels(0, 0, videoSize.width, videoSize.height, GL_RGBA, GL_UNSIGNED_BYTE, pixelBufferData);
}
}
void(^write)() = ^() {
while( ! assetWriterVideoInput.readyForMoreMediaData && ! _encodingLiveVideo && ! videoEncodingIsFinished ) {
NSDate *maxDate = [NSDate dateWithTimeIntervalSinceNow:0.1];
// NSLog(@"video waiting...");
[[NSRunLoop currentRunLoop] runUntilDate:maxDate];
}
if (!assetWriterVideoInput.readyForMoreMediaData)
{
NSLog(@"2: Had to drop a video frame: %@", CFBridgingRelease(CMTimeCopyDescription(kCFAllocatorDefault, frameTime)));
}
else if(self.assetWriter.status == AVAssetWriterStatusWriting)
{
if (![assetWriterPixelBufferInput appendPixelBuffer:pixel_buffer withPresentationTime:frameTime])
NSLog(@"Problem appending pixel buffer at time: %@", CFBridgingRelease(CMTimeCopyDescription(kCFAllocatorDefault, frameTime)));
}
else
{
NSLog(@"Couldn't write a frame");
//NSLog(@"Wrote a video frame: %@", CFBridgingRelease(CMTimeCopyDescription(kCFAllocatorDefault, frameTime)));
}
CVPixelBufferUnlockBaseAddress(pixel_buffer, 0);
previousFrameTime = frameTime;
if (![GPUImageContext supportsFastTextureUpload])
{
CVPixelBufferRelease(pixel_buffer);
}
};
write();
[inputFramebufferForBlock unlock];
});
}
- (NSInteger)nextAvailableTextureIndex;
{
return 0;
}
- (void)setInputFramebuffer:(GPUImageFramebuffer *)newInputFramebuffer atIndex:(NSInteger)textureIndex;
{
[newInputFramebuffer lock];
// runSynchronouslyOnContextQueue(_movieWriterContext, ^{
firstInputFramebuffer = newInputFramebuffer;
// });
}
- (void)setInputRotation:(GPUImageRotationMode)newInputRotation atIndex:(NSInteger)textureIndex;
{
inputRotation = newInputRotation;
}
- (void)setInputSize:(CGSize)newSize atIndex:(NSInteger)textureIndex;
{
}
- (CGSize)maximumOutputSize;
{
return videoSize;
}
- (void)endProcessing
{
if (completionBlock)
{
if (!alreadyFinishedRecording)
{
alreadyFinishedRecording = YES;
completionBlock();
}
}
else
{
if (_delegate && [_delegate respondsToSelector:@selector(movieRecordingCompleted)])
{
[_delegate movieRecordingCompleted];
}
}
}
- (BOOL)shouldIgnoreUpdatesToThisTarget;
{
return NO;
}
- (BOOL)wantsMonochromeInput;
{
return NO;
}
- (void)setCurrentlyReceivingMonochromeInput:(BOOL)newValue;
{
}
#pragma mark -
#pragma mark Accessors
- (void)setHasAudioTrack:(BOOL)newValue
{
[self setHasAudioTrack:newValue audioSettings:nil];
}
- (void)setHasAudioTrack:(BOOL)newValue audioSettings:(NSDictionary *)audioOutputSettings;
{
_hasAudioTrack = newValue;
if (_hasAudioTrack)
{
if (_shouldPassthroughAudio)
{
// Do not set any settings so audio will be the same as passthrough
audioOutputSettings = nil;
}
else if (audioOutputSettings == nil)
{
AVAudioSession *sharedAudioSession = [AVAudioSession sharedInstance];
double preferredHardwareSampleRate;
if ([sharedAudioSession respondsToSelector:@selector(sampleRate)])
{
preferredHardwareSampleRate = [sharedAudioSession sampleRate];
}
else
{
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
preferredHardwareSampleRate = [[AVAudioSession sharedInstance] currentHardwareSampleRate];
#pragma clang diagnostic pop
}
AudioChannelLayout acl;
bzero( &acl, sizeof(acl));
acl.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
audioOutputSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[ NSNumber numberWithInt: kAudioFormatMPEG4AAC], AVFormatIDKey,
[ NSNumber numberWithInt: 1 ], AVNumberOfChannelsKey,
[ NSNumber numberWithFloat: preferredHardwareSampleRate ], AVSampleRateKey,
[ NSData dataWithBytes: &acl length: sizeof( acl ) ], AVChannelLayoutKey,
//[ NSNumber numberWithInt:AVAudioQualityLow], AVEncoderAudioQualityKey,
[ NSNumber numberWithInt: 64000 ], AVEncoderBitRateKey,
nil];
/*
AudioChannelLayout acl;
bzero( &acl, sizeof(acl));
acl.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
audioOutputSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[ NSNumber numberWithInt: kAudioFormatMPEG4AAC ], AVFormatIDKey,
[ NSNumber numberWithInt: 1 ], AVNumberOfChannelsKey,
[ NSNumber numberWithFloat: 44100.0 ], AVSampleRateKey,
[ NSNumber numberWithInt: 64000 ], AVEncoderBitRateKey,
[ NSData dataWithBytes: &acl length: sizeof( acl ) ], AVChannelLayoutKey,
nil];*/
}
assetWriterAudioInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeAudio outputSettings:audioOutputSettings];
[assetWriter addInput:assetWriterAudioInput];
assetWriterAudioInput.expectsMediaDataInRealTime = _encodingLiveVideo;
}
else
{
// Remove audio track if it exists
}
}
- (NSArray*)metaData {
return assetWriter.metadata;
}
- (void)setMetaData:(NSArray*)metaData {
assetWriter.metadata = metaData;
}
- (CMTime)duration {
if( ! CMTIME_IS_VALID(startTime) )
return kCMTimeZero;
if( ! CMTIME_IS_NEGATIVE_INFINITY(previousFrameTime) )
return CMTimeSubtract(previousFrameTime, startTime);
if( ! CMTIME_IS_NEGATIVE_INFINITY(previousAudioTime) )
return CMTimeSubtract(previousAudioTime, startTime);
return kCMTimeZero;
}
- (CGAffineTransform)transform {
return assetWriterVideoInput.transform;
}
- (void)setTransform:(CGAffineTransform)transform {
assetWriterVideoInput.transform = transform;
}
- (AVAssetWriter*)assetWriter {
return assetWriter;
}
- (void)setPaused:(BOOL)newValue {
if (_paused != newValue) {
_paused = newValue;
if (_paused) {
discont = YES;
}
}
}
- (CMSampleBufferRef)adjustTime:(CMSampleBufferRef) sample by:(CMTime) offset {
CMItemCount count;
CMSampleBufferGetSampleTimingInfoArray(sample, 0, nil, &count);