2 * AVFoundation input device
3 * Copyright (c) 2014 Thilo Borgmann <thilo.borgmann@mail.de>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * AVFoundation input device
25 * @author Thilo Borgmann <thilo.borgmann@mail.de>
28 #import <AVFoundation/AVFoundation.h>
31 #include "libavutil/pixdesc.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/avstring.h"
34 #include "libavformat/internal.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/parseutils.h"
37 #include "libavutil/time.h"
40 static const int avf_time_base = 1000000;
42 static const AVRational avf_time_base_q = {
47 struct AVFPixelFormatSpec {
48 enum AVPixelFormat ff_id;
52 static const struct AVFPixelFormatSpec avf_pixel_formats[] = {
53 { AV_PIX_FMT_MONOBLACK, kCVPixelFormatType_1Monochrome },
54 { AV_PIX_FMT_RGB555BE, kCVPixelFormatType_16BE555 },
55 { AV_PIX_FMT_RGB555LE, kCVPixelFormatType_16LE555 },
56 { AV_PIX_FMT_RGB565BE, kCVPixelFormatType_16BE565 },
57 { AV_PIX_FMT_RGB565LE, kCVPixelFormatType_16LE565 },
58 { AV_PIX_FMT_RGB24, kCVPixelFormatType_24RGB },
59 { AV_PIX_FMT_BGR24, kCVPixelFormatType_24BGR },
60 { AV_PIX_FMT_0RGB, kCVPixelFormatType_32ARGB },
61 { AV_PIX_FMT_BGR0, kCVPixelFormatType_32BGRA },
62 { AV_PIX_FMT_0BGR, kCVPixelFormatType_32ABGR },
63 { AV_PIX_FMT_RGB0, kCVPixelFormatType_32RGBA },
64 { AV_PIX_FMT_BGR48BE, kCVPixelFormatType_48RGB },
65 { AV_PIX_FMT_UYVY422, kCVPixelFormatType_422YpCbCr8 },
66 { AV_PIX_FMT_YUVA444P, kCVPixelFormatType_4444YpCbCrA8R },
67 { AV_PIX_FMT_YUVA444P16LE, kCVPixelFormatType_4444AYpCbCr16 },
68 { AV_PIX_FMT_YUV444P, kCVPixelFormatType_444YpCbCr8 },
69 { AV_PIX_FMT_YUV422P16, kCVPixelFormatType_422YpCbCr16 },
70 { AV_PIX_FMT_YUV422P10, kCVPixelFormatType_422YpCbCr10 },
71 { AV_PIX_FMT_YUV444P10, kCVPixelFormatType_444YpCbCr10 },
72 { AV_PIX_FMT_YUV420P, kCVPixelFormatType_420YpCbCr8Planar },
73 { AV_PIX_FMT_NV12, kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange },
74 { AV_PIX_FMT_YUYV422, kCVPixelFormatType_422YpCbCr8_yuvs },
75 #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
76 { AV_PIX_FMT_GRAY8, kCVPixelFormatType_OneComponent8 },
78 { AV_PIX_FMT_NONE, 0 }
86 int audio_frames_captured;
88 int64_t first_audio_pts;
89 pthread_mutex_t frame_lock;
90 pthread_cond_t frame_wait_cond;
92 id avf_audio_delegate;
98 int capture_mouse_clicks;
101 int video_device_index;
102 int video_stream_index;
103 int audio_device_index;
104 int audio_stream_index;
106 char *video_filename;
107 char *audio_filename;
109 int num_video_devices;
112 int audio_bits_per_sample;
115 int audio_signed_integer;
117 int audio_non_interleaved;
119 int32_t *audio_buffer;
120 int audio_buffer_size;
122 enum AVPixelFormat pixel_format;
124 AVCaptureSession *capture_session;
125 AVCaptureVideoDataOutput *video_output;
126 AVCaptureAudioDataOutput *audio_output;
127 CMSampleBufferRef current_frame;
128 CMSampleBufferRef current_audio_frame;
131 static void lock_frames(AVFContext* ctx)
133 pthread_mutex_lock(&ctx->frame_lock);
136 static void unlock_frames(AVFContext* ctx)
138 pthread_mutex_unlock(&ctx->frame_lock);
141 /** FrameReciever class - delegate for AVCaptureSession
143 @interface AVFFrameReceiver : NSObject
145 AVFContext* _context;
148 - (id)initWithContext:(AVFContext*)context;
150 - (void) captureOutput:(AVCaptureOutput *)captureOutput
151 didOutputSampleBuffer:(CMSampleBufferRef)videoFrame
152 fromConnection:(AVCaptureConnection *)connection;
156 @implementation AVFFrameReceiver
158 - (id)initWithContext:(AVFContext*)context
160 if (self = [super init]) {
166 - (void) captureOutput:(AVCaptureOutput *)captureOutput
167 didOutputSampleBuffer:(CMSampleBufferRef)videoFrame
168 fromConnection:(AVCaptureConnection *)connection
170 lock_frames(_context);
172 if (_context->current_frame != nil) {
173 CFRelease(_context->current_frame);
176 _context->current_frame = (CMSampleBufferRef)CFRetain(videoFrame);
178 pthread_cond_signal(&_context->frame_wait_cond);
180 unlock_frames(_context);
182 ++_context->frames_captured;
187 /** AudioReciever class - delegate for AVCaptureSession
189 @interface AVFAudioReceiver : NSObject
191 AVFContext* _context;
194 - (id)initWithContext:(AVFContext*)context;
196 - (void) captureOutput:(AVCaptureOutput *)captureOutput
197 didOutputSampleBuffer:(CMSampleBufferRef)audioFrame
198 fromConnection:(AVCaptureConnection *)connection;
202 @implementation AVFAudioReceiver
204 - (id)initWithContext:(AVFContext*)context
206 if (self = [super init]) {
212 - (void) captureOutput:(AVCaptureOutput *)captureOutput
213 didOutputSampleBuffer:(CMSampleBufferRef)audioFrame
214 fromConnection:(AVCaptureConnection *)connection
216 lock_frames(_context);
218 if (_context->current_audio_frame != nil) {
219 CFRelease(_context->current_audio_frame);
222 _context->current_audio_frame = (CMSampleBufferRef)CFRetain(audioFrame);
224 pthread_cond_signal(&_context->frame_wait_cond);
226 unlock_frames(_context);
228 ++_context->audio_frames_captured;
233 static void destroy_context(AVFContext* ctx)
235 [ctx->capture_session stopRunning];
237 [ctx->capture_session release];
238 [ctx->video_output release];
239 [ctx->audio_output release];
240 [ctx->avf_delegate release];
241 [ctx->avf_audio_delegate release];
243 ctx->capture_session = NULL;
244 ctx->video_output = NULL;
245 ctx->audio_output = NULL;
246 ctx->avf_delegate = NULL;
247 ctx->avf_audio_delegate = NULL;
249 av_freep(&ctx->audio_buffer);
251 pthread_mutex_destroy(&ctx->frame_lock);
252 pthread_cond_destroy(&ctx->frame_wait_cond);
254 if (ctx->current_frame) {
255 CFRelease(ctx->current_frame);
259 static void parse_device_name(AVFormatContext *s)
261 AVFContext *ctx = (AVFContext*)s->priv_data;
262 char *tmp = av_strdup(s->filename);
266 ctx->video_filename = av_strtok(tmp, ":", &save);
267 ctx->audio_filename = av_strtok(NULL, ":", &save);
269 ctx->audio_filename = av_strtok(tmp, ":", &save);
274 * Configure the video device.
276 * Configure the video device using a run-time approach to access properties
277 * since formats, activeFormat are available since iOS >= 7.0 or OSX >= 10.7
278 * and activeVideoMaxFrameDuration is available since i0S >= 7.0 and OSX >= 10.9.
280 * The NSUndefinedKeyException must be handled by the caller of this function.
283 static int configure_video_device(AVFormatContext *s, AVCaptureDevice *video_device)
285 AVFContext *ctx = (AVFContext*)s->priv_data;
287 double framerate = av_q2d(ctx->framerate);
288 NSObject *range = nil;
289 NSObject *format = nil;
290 NSObject *selected_range = nil;
291 NSObject *selected_format = nil;
293 for (format in [video_device valueForKey:@"formats"]) {
294 CMFormatDescriptionRef formatDescription;
295 CMVideoDimensions dimensions;
297 formatDescription = (CMFormatDescriptionRef) [format performSelector:@selector(formatDescription)];
298 dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
300 if ((ctx->width == 0 && ctx->height == 0) ||
301 (dimensions.width == ctx->width && dimensions.height == ctx->height)) {
303 selected_format = format;
305 for (range in [format valueForKey:@"videoSupportedFrameRateRanges"]) {
306 double max_framerate;
308 [[range valueForKey:@"maxFrameRate"] getValue:&max_framerate];
309 if (fabs (framerate - max_framerate) < 0.01) {
310 selected_range = range;
317 if (!selected_format) {
318 av_log(s, AV_LOG_ERROR, "Selected video size (%dx%d) is not supported by the device\n",
319 ctx->width, ctx->height);
320 goto unsupported_format;
323 if (!selected_range) {
324 av_log(s, AV_LOG_ERROR, "Selected framerate (%f) is not supported by the device\n",
326 goto unsupported_format;
329 if ([video_device lockForConfiguration:NULL] == YES) {
330 NSValue *min_frame_duration = [selected_range valueForKey:@"minFrameDuration"];
332 [video_device setValue:selected_format forKey:@"activeFormat"];
333 [video_device setValue:min_frame_duration forKey:@"activeVideoMinFrameDuration"];
334 [video_device setValue:min_frame_duration forKey:@"activeVideoMaxFrameDuration"];
336 av_log(s, AV_LOG_ERROR, "Could not lock device for configuration");
337 return AVERROR(EINVAL);
344 av_log(s, AV_LOG_ERROR, "Supported modes:\n");
345 for (format in [video_device valueForKey:@"formats"]) {
346 CMFormatDescriptionRef formatDescription;
347 CMVideoDimensions dimensions;
349 formatDescription = (CMFormatDescriptionRef) [format performSelector:@selector(formatDescription)];
350 dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
352 for (range in [format valueForKey:@"videoSupportedFrameRateRanges"]) {
353 double min_framerate;
354 double max_framerate;
356 [[range valueForKey:@"minFrameRate"] getValue:&min_framerate];
357 [[range valueForKey:@"maxFrameRate"] getValue:&max_framerate];
358 av_log(s, AV_LOG_ERROR, " %dx%d@[%f %f]fps\n",
359 dimensions.width, dimensions.height,
360 min_framerate, max_framerate);
363 return AVERROR(EINVAL);
366 static int add_video_device(AVFormatContext *s, AVCaptureDevice *video_device)
368 AVFContext *ctx = (AVFContext*)s->priv_data;
370 NSError *error = nil;
371 AVCaptureInput* capture_input = nil;
372 struct AVFPixelFormatSpec pxl_fmt_spec;
373 NSNumber *pixel_format;
374 NSDictionary *capture_dict;
375 dispatch_queue_t queue;
377 if (ctx->video_device_index < ctx->num_video_devices) {
378 capture_input = (AVCaptureInput*) [[[AVCaptureDeviceInput alloc] initWithDevice:video_device error:&error] autorelease];
380 capture_input = (AVCaptureInput*) video_device;
383 if (!capture_input) {
384 av_log(s, AV_LOG_ERROR, "Failed to create AV capture input device: %s\n",
385 [[error localizedDescription] UTF8String]);
389 if ([ctx->capture_session canAddInput:capture_input]) {
390 [ctx->capture_session addInput:capture_input];
392 av_log(s, AV_LOG_ERROR, "can't add video input to capture session\n");
397 ctx->video_output = [[AVCaptureVideoDataOutput alloc] init];
399 if (!ctx->video_output) {
400 av_log(s, AV_LOG_ERROR, "Failed to init AV video output\n");
404 // Configure device framerate and video size
406 if ((ret = configure_video_device(s, video_device)) < 0) {
409 } @catch (NSException *exception) {
410 if (![[exception name] isEqualToString:NSUndefinedKeyException]) {
411 av_log (s, AV_LOG_ERROR, "An error occurred: %s", [exception.reason UTF8String]);
412 return AVERROR_EXTERNAL;
416 // select pixel format
417 pxl_fmt_spec.ff_id = AV_PIX_FMT_NONE;
419 for (int i = 0; avf_pixel_formats[i].ff_id != AV_PIX_FMT_NONE; i++) {
420 if (ctx->pixel_format == avf_pixel_formats[i].ff_id) {
421 pxl_fmt_spec = avf_pixel_formats[i];
426 // check if selected pixel format is supported by AVFoundation
427 if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
428 av_log(s, AV_LOG_ERROR, "Selected pixel format (%s) is not supported by AVFoundation.\n",
429 av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
433 // check if the pixel format is available for this device
434 if ([[ctx->video_output availableVideoCVPixelFormatTypes] indexOfObject:[NSNumber numberWithInt:pxl_fmt_spec.avf_id]] == NSNotFound) {
435 av_log(s, AV_LOG_ERROR, "Selected pixel format (%s) is not supported by the input device.\n",
436 av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
438 pxl_fmt_spec.ff_id = AV_PIX_FMT_NONE;
440 av_log(s, AV_LOG_ERROR, "Supported pixel formats:\n");
441 for (NSNumber *pxl_fmt in [ctx->video_output availableVideoCVPixelFormatTypes]) {
442 struct AVFPixelFormatSpec pxl_fmt_dummy;
443 pxl_fmt_dummy.ff_id = AV_PIX_FMT_NONE;
444 for (int i = 0; avf_pixel_formats[i].ff_id != AV_PIX_FMT_NONE; i++) {
445 if ([pxl_fmt intValue] == avf_pixel_formats[i].avf_id) {
446 pxl_fmt_dummy = avf_pixel_formats[i];
451 if (pxl_fmt_dummy.ff_id != AV_PIX_FMT_NONE) {
452 av_log(s, AV_LOG_ERROR, " %s\n", av_get_pix_fmt_name(pxl_fmt_dummy.ff_id));
454 // select first supported pixel format instead of user selected (or default) pixel format
455 if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
456 pxl_fmt_spec = pxl_fmt_dummy;
461 // fail if there is no appropriate pixel format or print a warning about overriding the pixel format
462 if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
465 av_log(s, AV_LOG_WARNING, "Overriding selected pixel format to use %s instead.\n",
466 av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
470 ctx->pixel_format = pxl_fmt_spec.ff_id;
471 pixel_format = [NSNumber numberWithUnsignedInt:pxl_fmt_spec.avf_id];
472 capture_dict = [NSDictionary dictionaryWithObject:pixel_format
473 forKey:(id)kCVPixelBufferPixelFormatTypeKey];
475 [ctx->video_output setVideoSettings:capture_dict];
476 [ctx->video_output setAlwaysDiscardsLateVideoFrames:YES];
478 ctx->avf_delegate = [[AVFFrameReceiver alloc] initWithContext:ctx];
480 queue = dispatch_queue_create("avf_queue", NULL);
481 [ctx->video_output setSampleBufferDelegate:ctx->avf_delegate queue:queue];
482 dispatch_release(queue);
484 if ([ctx->capture_session canAddOutput:ctx->video_output]) {
485 [ctx->capture_session addOutput:ctx->video_output];
487 av_log(s, AV_LOG_ERROR, "can't add video output to capture session\n");
494 static int add_audio_device(AVFormatContext *s, AVCaptureDevice *audio_device)
496 AVFContext *ctx = (AVFContext*)s->priv_data;
497 NSError *error = nil;
498 AVCaptureDeviceInput* audio_dev_input = [[[AVCaptureDeviceInput alloc] initWithDevice:audio_device error:&error] autorelease];
499 dispatch_queue_t queue;
501 if (!audio_dev_input) {
502 av_log(s, AV_LOG_ERROR, "Failed to create AV capture input device: %s\n",
503 [[error localizedDescription] UTF8String]);
507 if ([ctx->capture_session canAddInput:audio_dev_input]) {
508 [ctx->capture_session addInput:audio_dev_input];
510 av_log(s, AV_LOG_ERROR, "can't add audio input to capture session\n");
515 ctx->audio_output = [[AVCaptureAudioDataOutput alloc] init];
517 if (!ctx->audio_output) {
518 av_log(s, AV_LOG_ERROR, "Failed to init AV audio output\n");
522 ctx->avf_audio_delegate = [[AVFAudioReceiver alloc] initWithContext:ctx];
524 queue = dispatch_queue_create("avf_audio_queue", NULL);
525 [ctx->audio_output setSampleBufferDelegate:ctx->avf_audio_delegate queue:queue];
526 dispatch_release(queue);
528 if ([ctx->capture_session canAddOutput:ctx->audio_output]) {
529 [ctx->capture_session addOutput:ctx->audio_output];
531 av_log(s, AV_LOG_ERROR, "adding audio output to capture session failed\n");
538 static int get_video_config(AVFormatContext *s)
540 AVFContext *ctx = (AVFContext*)s->priv_data;
541 CVImageBufferRef image_buffer;
542 CGSize image_buffer_size;
543 AVStream* stream = avformat_new_stream(s, NULL);
549 // Take stream info from the first frame.
550 while (ctx->frames_captured < 1) {
551 CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, YES);
556 ctx->video_stream_index = stream->index;
558 avpriv_set_pts_info(stream, 64, 1, avf_time_base);
560 image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame);
561 image_buffer_size = CVImageBufferGetEncodedSize(image_buffer);
563 stream->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
564 stream->codec->codec_type = AVMEDIA_TYPE_VIDEO;
565 stream->codec->width = (int)image_buffer_size.width;
566 stream->codec->height = (int)image_buffer_size.height;
567 stream->codec->pix_fmt = ctx->pixel_format;
569 CFRelease(ctx->current_frame);
570 ctx->current_frame = nil;
577 static int get_audio_config(AVFormatContext *s)
579 AVFContext *ctx = (AVFContext*)s->priv_data;
580 CMFormatDescriptionRef format_desc;
581 AVStream* stream = avformat_new_stream(s, NULL);
587 // Take stream info from the first frame.
588 while (ctx->audio_frames_captured < 1) {
589 CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, YES);
594 ctx->audio_stream_index = stream->index;
596 avpriv_set_pts_info(stream, 64, 1, avf_time_base);
598 format_desc = CMSampleBufferGetFormatDescription(ctx->current_audio_frame);
599 const AudioStreamBasicDescription *basic_desc = CMAudioFormatDescriptionGetStreamBasicDescription(format_desc);
602 av_log(s, AV_LOG_ERROR, "audio format not available\n");
606 stream->codec->codec_type = AVMEDIA_TYPE_AUDIO;
607 stream->codec->sample_rate = basic_desc->mSampleRate;
608 stream->codec->channels = basic_desc->mChannelsPerFrame;
609 stream->codec->channel_layout = av_get_default_channel_layout(stream->codec->channels);
611 ctx->audio_channels = basic_desc->mChannelsPerFrame;
612 ctx->audio_bits_per_sample = basic_desc->mBitsPerChannel;
613 ctx->audio_float = basic_desc->mFormatFlags & kAudioFormatFlagIsFloat;
614 ctx->audio_be = basic_desc->mFormatFlags & kAudioFormatFlagIsBigEndian;
615 ctx->audio_signed_integer = basic_desc->mFormatFlags & kAudioFormatFlagIsSignedInteger;
616 ctx->audio_packed = basic_desc->mFormatFlags & kAudioFormatFlagIsPacked;
617 ctx->audio_non_interleaved = basic_desc->mFormatFlags & kAudioFormatFlagIsNonInterleaved;
619 if (basic_desc->mFormatID == kAudioFormatLinearPCM &&
621 ctx->audio_bits_per_sample == 32 &&
623 stream->codec->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
624 } else if (basic_desc->mFormatID == kAudioFormatLinearPCM &&
625 ctx->audio_signed_integer &&
626 ctx->audio_bits_per_sample == 16 &&
628 stream->codec->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
629 } else if (basic_desc->mFormatID == kAudioFormatLinearPCM &&
630 ctx->audio_signed_integer &&
631 ctx->audio_bits_per_sample == 24 &&
633 stream->codec->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
634 } else if (basic_desc->mFormatID == kAudioFormatLinearPCM &&
635 ctx->audio_signed_integer &&
636 ctx->audio_bits_per_sample == 32 &&
638 stream->codec->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
640 av_log(s, AV_LOG_ERROR, "audio format is not supported\n");
644 if (ctx->audio_non_interleaved) {
645 CMBlockBufferRef block_buffer = CMSampleBufferGetDataBuffer(ctx->current_audio_frame);
646 ctx->audio_buffer_size = CMBlockBufferGetDataLength(block_buffer);
647 ctx->audio_buffer = av_malloc(ctx->audio_buffer_size);
648 if (!ctx->audio_buffer) {
649 av_log(s, AV_LOG_ERROR, "error allocating audio buffer\n");
654 CFRelease(ctx->current_audio_frame);
655 ctx->current_audio_frame = nil;
662 static int avf_read_header(AVFormatContext *s)
664 NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
665 int capture_screen = 0;
666 uint32_t num_screens = 0;
667 AVFContext *ctx = (AVFContext*)s->priv_data;
668 AVCaptureDevice *video_device = nil;
669 AVCaptureDevice *audio_device = nil;
670 // Find capture device
671 NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
672 ctx->num_video_devices = [devices count];
674 ctx->first_pts = av_gettime();
675 ctx->first_audio_pts = av_gettime();
677 pthread_mutex_init(&ctx->frame_lock, NULL);
678 pthread_cond_init(&ctx->frame_wait_cond, NULL);
680 #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
681 CGGetActiveDisplayList(0, NULL, &num_screens);
684 // List devices if requested
685 if (ctx->list_devices) {
687 av_log(ctx, AV_LOG_INFO, "AVFoundation video devices:\n");
688 for (AVCaptureDevice *device in devices) {
689 const char *name = [[device localizedName] UTF8String];
690 index = [devices indexOfObject:device];
691 av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name);
694 #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
695 if (num_screens > 0) {
696 CGDirectDisplayID screens[num_screens];
697 CGGetActiveDisplayList(num_screens, screens, &num_screens);
698 for (int i = 0; i < num_screens; i++) {
699 av_log(ctx, AV_LOG_INFO, "[%d] Capture screen %d\n", index + i, i);
704 av_log(ctx, AV_LOG_INFO, "AVFoundation audio devices:\n");
705 devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio];
706 for (AVCaptureDevice *device in devices) {
707 const char *name = [[device localizedName] UTF8String];
708 int index = [devices indexOfObject:device];
709 av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name);
714 // parse input filename for video and audio device
715 parse_device_name(s);
717 // check for device index given in filename
718 if (ctx->video_device_index == -1 && ctx->video_filename) {
719 sscanf(ctx->video_filename, "%d", &ctx->video_device_index);
721 if (ctx->audio_device_index == -1 && ctx->audio_filename) {
722 sscanf(ctx->audio_filename, "%d", &ctx->audio_device_index);
725 if (ctx->video_device_index >= 0) {
726 if (ctx->video_device_index < ctx->num_video_devices) {
727 video_device = [devices objectAtIndex:ctx->video_device_index];
728 } else if (ctx->video_device_index < ctx->num_video_devices + num_screens) {
729 #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
730 CGDirectDisplayID screens[num_screens];
731 CGGetActiveDisplayList(num_screens, screens, &num_screens);
732 AVCaptureScreenInput* capture_screen_input = [[[AVCaptureScreenInput alloc] initWithDisplayID:screens[ctx->video_device_index - ctx->num_video_devices]] autorelease];
734 if (ctx->framerate.num > 0) {
735 capture_screen_input.minFrameDuration = CMTimeMake(ctx->framerate.den, ctx->framerate.num);
738 #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
739 if (ctx->capture_cursor) {
740 capture_screen_input.capturesCursor = YES;
742 capture_screen_input.capturesCursor = NO;
746 if (ctx->capture_mouse_clicks) {
747 capture_screen_input.capturesMouseClicks = YES;
749 capture_screen_input.capturesMouseClicks = NO;
752 video_device = (AVCaptureDevice*) capture_screen_input;
756 av_log(ctx, AV_LOG_ERROR, "Invalid device index\n");
759 } else if (ctx->video_filename &&
760 strncmp(ctx->video_filename, "none", 4)) {
761 if (!strncmp(ctx->video_filename, "default", 7)) {
762 video_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
764 // looking for video inputs
765 for (AVCaptureDevice *device in devices) {
766 if (!strncmp(ctx->video_filename, [[device localizedName] UTF8String], strlen(ctx->video_filename))) {
767 video_device = device;
772 #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
773 // looking for screen inputs
776 if(sscanf(ctx->video_filename, "Capture screen %d", &idx) && idx < num_screens) {
777 CGDirectDisplayID screens[num_screens];
778 CGGetActiveDisplayList(num_screens, screens, &num_screens);
779 AVCaptureScreenInput* capture_screen_input = [[[AVCaptureScreenInput alloc] initWithDisplayID:screens[idx]] autorelease];
780 video_device = (AVCaptureDevice*) capture_screen_input;
781 ctx->video_device_index = ctx->num_video_devices + idx;
784 if (ctx->framerate.num > 0) {
785 capture_screen_input.minFrameDuration = CMTimeMake(ctx->framerate.den, ctx->framerate.num);
788 #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
789 if (ctx->capture_cursor) {
790 capture_screen_input.capturesCursor = YES;
792 capture_screen_input.capturesCursor = NO;
796 if (ctx->capture_mouse_clicks) {
797 capture_screen_input.capturesMouseClicks = YES;
799 capture_screen_input.capturesMouseClicks = NO;
807 av_log(ctx, AV_LOG_ERROR, "Video device not found\n");
813 if (ctx->audio_device_index >= 0) {
814 NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio];
816 if (ctx->audio_device_index >= [devices count]) {
817 av_log(ctx, AV_LOG_ERROR, "Invalid audio device index\n");
821 audio_device = [devices objectAtIndex:ctx->audio_device_index];
822 } else if (ctx->audio_filename &&
823 strncmp(ctx->audio_filename, "none", 4)) {
824 if (!strncmp(ctx->audio_filename, "default", 7)) {
825 audio_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
827 NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio];
829 for (AVCaptureDevice *device in devices) {
830 if (!strncmp(ctx->audio_filename, [[device localizedName] UTF8String], strlen(ctx->audio_filename))) {
831 audio_device = device;
838 av_log(ctx, AV_LOG_ERROR, "Audio device not found\n");
843 // Video nor Audio capture device not found, looking for AVMediaTypeVideo/Audio
844 if (!video_device && !audio_device) {
845 av_log(s, AV_LOG_ERROR, "No AV capture device found\n");
850 if (ctx->video_device_index < ctx->num_video_devices) {
851 av_log(s, AV_LOG_DEBUG, "'%s' opened\n", [[video_device localizedName] UTF8String]);
853 av_log(s, AV_LOG_DEBUG, "'%s' opened\n", [[video_device description] UTF8String]);
857 av_log(s, AV_LOG_DEBUG, "audio device '%s' opened\n", [[audio_device localizedName] UTF8String]);
860 // Initialize capture session
861 ctx->capture_session = [[AVCaptureSession alloc] init];
863 if (video_device && add_video_device(s, video_device)) {
866 if (audio_device && add_audio_device(s, audio_device)) {
869 [ctx->capture_session startRunning];
871 /* Unlock device configuration only after the session is started so it
872 * does not reset the capture formats */
873 if (!capture_screen) {
874 [video_device unlockForConfiguration];
877 if (video_device && get_video_config(s)) {
882 if (audio_device && get_audio_config(s)) {
891 destroy_context(ctx);
895 static int avf_read_packet(AVFormatContext *s, AVPacket *pkt)
897 AVFContext* ctx = (AVFContext*)s->priv_data;
900 CVImageBufferRef image_buffer;
903 image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame);
905 if (ctx->current_frame != nil) {
907 if (av_new_packet(pkt, (int)CVPixelBufferGetDataSize(image_buffer)) < 0) {
912 CMSampleTimingInfo timing_info;
914 if (CMSampleBufferGetOutputSampleTimingInfoArray(ctx->current_frame, 1, &timing_info, &count) == noErr) {
915 AVRational timebase_q = av_make_q(1, timing_info.presentationTimeStamp.timescale);
916 pkt->pts = pkt->dts = av_rescale_q(timing_info.presentationTimeStamp.value, timebase_q, avf_time_base_q);
919 pkt->stream_index = ctx->video_stream_index;
920 pkt->flags |= AV_PKT_FLAG_KEY;
922 CVPixelBufferLockBaseAddress(image_buffer, 0);
924 data = CVPixelBufferGetBaseAddress(image_buffer);
925 memcpy(pkt->data, data, pkt->size);
927 CVPixelBufferUnlockBaseAddress(image_buffer, 0);
928 CFRelease(ctx->current_frame);
929 ctx->current_frame = nil;
930 } else if (ctx->current_audio_frame != nil) {
931 CMBlockBufferRef block_buffer = CMSampleBufferGetDataBuffer(ctx->current_audio_frame);
932 int block_buffer_size = CMBlockBufferGetDataLength(block_buffer);
934 if (!block_buffer || !block_buffer_size) {
938 if (ctx->audio_non_interleaved && block_buffer_size > ctx->audio_buffer_size) {
939 return AVERROR_BUFFER_TOO_SMALL;
942 if (av_new_packet(pkt, block_buffer_size) < 0) {
947 CMSampleTimingInfo timing_info;
949 if (CMSampleBufferGetOutputSampleTimingInfoArray(ctx->current_audio_frame, 1, &timing_info, &count) == noErr) {
950 AVRational timebase_q = av_make_q(1, timing_info.presentationTimeStamp.timescale);
951 pkt->pts = pkt->dts = av_rescale_q(timing_info.presentationTimeStamp.value, timebase_q, avf_time_base_q);
954 pkt->stream_index = ctx->audio_stream_index;
955 pkt->flags |= AV_PKT_FLAG_KEY;
957 if (ctx->audio_non_interleaved) {
958 int sample, c, shift, num_samples;
960 OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, ctx->audio_buffer);
961 if (ret != kCMBlockBufferNoErr) {
965 num_samples = pkt->size / (ctx->audio_channels * (ctx->audio_bits_per_sample >> 3));
967 // transform decoded frame into output format
968 #define INTERLEAVE_OUTPUT(bps) \
970 int##bps##_t **src; \
971 int##bps##_t *dest; \
972 src = av_malloc(ctx->audio_channels * sizeof(int##bps##_t*)); \
973 if (!src) return AVERROR(EIO); \
974 for (c = 0; c < ctx->audio_channels; c++) { \
975 src[c] = ((int##bps##_t*)ctx->audio_buffer) + c * num_samples; \
977 dest = (int##bps##_t*)pkt->data; \
978 shift = bps - ctx->audio_bits_per_sample; \
979 for (sample = 0; sample < num_samples; sample++) \
980 for (c = 0; c < ctx->audio_channels; c++) \
981 *dest++ = src[c][sample] << shift; \
985 if (ctx->audio_bits_per_sample <= 16) {
986 INTERLEAVE_OUTPUT(16)
988 INTERLEAVE_OUTPUT(32)
991 OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, pkt->data);
992 if (ret != kCMBlockBufferNoErr) {
997 CFRelease(ctx->current_audio_frame);
998 ctx->current_audio_frame = nil;
1001 pthread_cond_wait(&ctx->frame_wait_cond, &ctx->frame_lock);
1005 } while (!pkt->data);
1010 static int avf_close(AVFormatContext *s)
1012 AVFContext* ctx = (AVFContext*)s->priv_data;
1013 destroy_context(ctx);
1017 static const AVOption options[] = {
1018 { "list_devices", "list available devices", offsetof(AVFContext, list_devices), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, "list_devices" },
1019 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "list_devices" },
1020 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "list_devices" },
1021 { "video_device_index", "select video device by index for devices with same name (starts at 0)", offsetof(AVFContext, video_device_index), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
1022 { "audio_device_index", "select audio device by index for devices with same name (starts at 0)", offsetof(AVFContext, audio_device_index), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
1023 { "pixel_format", "set pixel format", offsetof(AVFContext, pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_YUV420P}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM},
1024 { "framerate", "set frame rate", offsetof(AVFContext, framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "ntsc"}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
1025 { "video_size", "set video size", offsetof(AVFContext, width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
1026 { "capture_cursor", "capture the screen cursor", offsetof(AVFContext, capture_cursor), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
1027 { "capture_mouse_clicks", "capture the screen mouse clicks", offsetof(AVFContext, capture_mouse_clicks), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
1032 static const AVClass avf_class = {
1033 .class_name = "AVFoundation input device",
1034 .item_name = av_default_item_name,
1036 .version = LIBAVUTIL_VERSION_INT,
1037 .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
1040 AVInputFormat ff_avfoundation_demuxer = {
1041 .name = "avfoundation",
1042 .long_name = NULL_IF_CONFIG_SMALL("AVFoundation input device"),
1043 .priv_data_size = sizeof(AVFContext),
1044 .read_header = avf_read_header,
1045 .read_packet = avf_read_packet,
1046 .read_close = avf_close,
1047 .flags = AVFMT_NOFILE,
1048 .priv_class = &avf_class,