/* * AVFoundation input device * Copyright (c) 2014 Thilo Borgmann * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * AVFoundation input device * @author Thilo Borgmann */ #import #include #include "libavutil/channel_layout.h" #include "libavutil/pixdesc.h" #include "libavutil/opt.h" #include "libavutil/avstring.h" #include "libavformat/internal.h" #include "libavutil/internal.h" #include "libavutil/parseutils.h" #include "libavutil/time.h" #include "libavutil/imgutils.h" #include "avdevice.h" static const int avf_time_base = 1000000; static const AVRational avf_time_base_q = { .num = 1, .den = avf_time_base }; struct AVFPixelFormatSpec { enum AVPixelFormat ff_id; OSType avf_id; }; static const struct AVFPixelFormatSpec avf_pixel_formats[] = { { AV_PIX_FMT_MONOBLACK, kCVPixelFormatType_1Monochrome }, { AV_PIX_FMT_RGB555BE, kCVPixelFormatType_16BE555 }, { AV_PIX_FMT_RGB555LE, kCVPixelFormatType_16LE555 }, { AV_PIX_FMT_RGB565BE, kCVPixelFormatType_16BE565 }, { AV_PIX_FMT_RGB565LE, kCVPixelFormatType_16LE565 }, { AV_PIX_FMT_RGB24, kCVPixelFormatType_24RGB }, { AV_PIX_FMT_BGR24, kCVPixelFormatType_24BGR }, { AV_PIX_FMT_0RGB, kCVPixelFormatType_32ARGB }, { AV_PIX_FMT_BGR0, kCVPixelFormatType_32BGRA }, { AV_PIX_FMT_0BGR, kCVPixelFormatType_32ABGR }, { AV_PIX_FMT_RGB0, kCVPixelFormatType_32RGBA }, { AV_PIX_FMT_BGR48BE, kCVPixelFormatType_48RGB }, { AV_PIX_FMT_UYVY422, kCVPixelFormatType_422YpCbCr8 }, { AV_PIX_FMT_YUVA444P, kCVPixelFormatType_4444YpCbCrA8R }, { AV_PIX_FMT_YUVA444P16LE, kCVPixelFormatType_4444AYpCbCr16 }, { AV_PIX_FMT_YUV444P, kCVPixelFormatType_444YpCbCr8 }, { AV_PIX_FMT_YUV422P16, kCVPixelFormatType_422YpCbCr16 }, { AV_PIX_FMT_YUV422P10, kCVPixelFormatType_422YpCbCr10 }, { AV_PIX_FMT_YUV444P10, kCVPixelFormatType_444YpCbCr10 }, { AV_PIX_FMT_YUV420P, kCVPixelFormatType_420YpCbCr8Planar }, { AV_PIX_FMT_NV12, kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange }, { AV_PIX_FMT_YUYV422, kCVPixelFormatType_422YpCbCr8_yuvs }, #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080 { AV_PIX_FMT_GRAY8, kCVPixelFormatType_OneComponent8 }, #endif { AV_PIX_FMT_NONE, 0 } }; typedef struct { AVClass* class; int frames_captured; int audio_frames_captured; pthread_mutex_t frame_lock; id avf_delegate; id avf_audio_delegate; AVRational framerate; int width, height; int capture_cursor; int capture_mouse_clicks; int capture_raw_data; int drop_late_frames; int video_is_muxed; int video_is_screen; int list_devices; int video_device_index; int video_stream_index; int audio_device_index; int audio_stream_index; char *url; char *video_filename; char *audio_filename; int num_video_devices; int audio_channels; int audio_bits_per_sample; int audio_float; int audio_be; int audio_signed_integer; int audio_packed; int audio_non_interleaved; int32_t *audio_buffer; int audio_buffer_size; enum AVPixelFormat pixel_format; AVCaptureSession *capture_session; AVCaptureVideoDataOutput *video_output; AVCaptureAudioDataOutput *audio_output; CMSampleBufferRef current_frame; CMSampleBufferRef current_audio_frame; AVCaptureDevice *observed_device; #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 AVCaptureDeviceTransportControlsPlaybackMode observed_mode; #endif int observed_quit; } AVFContext; static void lock_frames(AVFContext* ctx) { pthread_mutex_lock(&ctx->frame_lock); } static void unlock_frames(AVFContext* ctx) { pthread_mutex_unlock(&ctx->frame_lock); } /** FrameReciever class - delegate for AVCaptureSession */ @interface AVFFrameReceiver : NSObject { AVFContext* _context; } - (id)initWithContext:(AVFContext*)context; - (void) captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)videoFrame fromConnection:(AVCaptureConnection *)connection; @end @implementation AVFFrameReceiver - (id)initWithContext:(AVFContext*)context { if (self = [super init]) { _context = context; // start observing if a device is set for it #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 if (_context->observed_device) { NSString *keyPath = NSStringFromSelector(@selector(transportControlsPlaybackMode)); NSKeyValueObservingOptions options = NSKeyValueObservingOptionNew; [_context->observed_device addObserver: self forKeyPath: keyPath options: options context: _context]; } #endif } return self; } - (void)dealloc { // stop observing if a device is set for it #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 if (_context->observed_device) { NSString *keyPath = NSStringFromSelector(@selector(transportControlsPlaybackMode)); [_context->observed_device removeObserver: self forKeyPath: keyPath]; } #endif [super dealloc]; } - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { if (context == _context) { #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 AVCaptureDeviceTransportControlsPlaybackMode mode = [change[NSKeyValueChangeNewKey] integerValue]; if (mode != _context->observed_mode) { if (mode == AVCaptureDeviceTransportControlsNotPlayingMode) { _context->observed_quit = 1; } _context->observed_mode = mode; } #endif } else { [super observeValueForKeyPath: keyPath ofObject: object change: change context: context]; } } - (void) captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)videoFrame fromConnection:(AVCaptureConnection *)connection { lock_frames(_context); if (_context->current_frame != nil) { CFRelease(_context->current_frame); } _context->current_frame = (CMSampleBufferRef)CFRetain(videoFrame); unlock_frames(_context); ++_context->frames_captured; } @end /** AudioReciever class - delegate for AVCaptureSession */ @interface AVFAudioReceiver : NSObject { AVFContext* _context; } - (id)initWithContext:(AVFContext*)context; - (void) captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)audioFrame fromConnection:(AVCaptureConnection *)connection; @end @implementation AVFAudioReceiver - (id)initWithContext:(AVFContext*)context { if (self = [super init]) { _context = context; } return self; } - (void) captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)audioFrame fromConnection:(AVCaptureConnection *)connection { lock_frames(_context); if (_context->current_audio_frame != nil) { CFRelease(_context->current_audio_frame); } _context->current_audio_frame = (CMSampleBufferRef)CFRetain(audioFrame); unlock_frames(_context); ++_context->audio_frames_captured; } @end static void destroy_context(AVFContext* ctx) { [ctx->capture_session stopRunning]; [ctx->capture_session release]; [ctx->video_output release]; [ctx->audio_output release]; [ctx->avf_delegate release]; [ctx->avf_audio_delegate release]; ctx->capture_session = NULL; ctx->video_output = NULL; ctx->audio_output = NULL; ctx->avf_delegate = NULL; ctx->avf_audio_delegate = NULL; av_freep(&ctx->url); av_freep(&ctx->audio_buffer); pthread_mutex_destroy(&ctx->frame_lock); if (ctx->current_frame) { CFRelease(ctx->current_frame); } } static void parse_device_name(AVFormatContext *s) { AVFContext *ctx = (AVFContext*)s->priv_data; ctx->url = av_strdup(s->url); char *save; if (ctx->url[0] != ':') { ctx->video_filename = av_strtok(ctx->url, ":", &save); ctx->audio_filename = av_strtok(NULL, ":", &save); } else { ctx->audio_filename = av_strtok(ctx->url, ":", &save); } } /** * Configure the video device. * * Configure the video device using a run-time approach to access properties * since formats, activeFormat are available since iOS >= 7.0 or OSX >= 10.7 * and activeVideoMaxFrameDuration is available since i0S >= 7.0 and OSX >= 10.9. * * The NSUndefinedKeyException must be handled by the caller of this function. * */ static int configure_video_device(AVFormatContext *s, AVCaptureDevice *video_device) { AVFContext *ctx = (AVFContext*)s->priv_data; double framerate = av_q2d(ctx->framerate); NSObject *range = nil; NSObject *format = nil; NSObject *selected_range = nil; NSObject *selected_format = nil; // try to configure format by formats list // might raise an exception if no format list is given // (then fallback to default, no configuration) @try { for (format in [video_device valueForKey:@"formats"]) { CMFormatDescriptionRef formatDescription; CMVideoDimensions dimensions; formatDescription = (CMFormatDescriptionRef) [format performSelector:@selector(formatDescription)]; dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription); if ((ctx->width == 0 && ctx->height == 0) || (dimensions.width == ctx->width && dimensions.height == ctx->height)) { selected_format = format; for (range in [format valueForKey:@"videoSupportedFrameRateRanges"]) { double max_framerate; [[range valueForKey:@"maxFrameRate"] getValue:&max_framerate]; if (fabs (framerate - max_framerate) < 0.01) { selected_range = range; break; } } } } if (!selected_format) { av_log(s, AV_LOG_ERROR, "Selected video size (%dx%d) is not supported by the device.\n", ctx->width, ctx->height); goto unsupported_format; } if (!selected_range) { av_log(s, AV_LOG_ERROR, "Selected framerate (%f) is not supported by the device.\n", framerate); if (ctx->video_is_muxed) { av_log(s, AV_LOG_ERROR, "Falling back to default.\n"); } else { goto unsupported_format; } } if ([video_device lockForConfiguration:NULL] == YES) { if (selected_format) { [video_device setValue:selected_format forKey:@"activeFormat"]; } if (selected_range) { NSValue *min_frame_duration = [selected_range valueForKey:@"minFrameDuration"]; [video_device setValue:min_frame_duration forKey:@"activeVideoMinFrameDuration"]; [video_device setValue:min_frame_duration forKey:@"activeVideoMaxFrameDuration"]; } } else { av_log(s, AV_LOG_ERROR, "Could not lock device for configuration.\n"); return AVERROR(EINVAL); } } @catch(NSException *e) { av_log(ctx, AV_LOG_WARNING, "Configuration of video device failed, falling back to default.\n"); } return 0; unsupported_format: av_log(s, AV_LOG_ERROR, "Supported modes:\n"); for (format in [video_device valueForKey:@"formats"]) { CMFormatDescriptionRef formatDescription; CMVideoDimensions dimensions; formatDescription = (CMFormatDescriptionRef) [format performSelector:@selector(formatDescription)]; dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription); for (range in [format valueForKey:@"videoSupportedFrameRateRanges"]) { double min_framerate; double max_framerate; [[range valueForKey:@"minFrameRate"] getValue:&min_framerate]; [[range valueForKey:@"maxFrameRate"] getValue:&max_framerate]; av_log(s, AV_LOG_ERROR, " %dx%d@[%f %f]fps\n", dimensions.width, dimensions.height, min_framerate, max_framerate); } } return AVERROR(EINVAL); } static int add_video_device(AVFormatContext *s, AVCaptureDevice *video_device) { AVFContext *ctx = (AVFContext*)s->priv_data; int ret; NSError *error = nil; AVCaptureInput* capture_input = nil; struct AVFPixelFormatSpec pxl_fmt_spec; NSNumber *pixel_format; NSDictionary *capture_dict; dispatch_queue_t queue; if (ctx->video_device_index < ctx->num_video_devices) { capture_input = (AVCaptureInput*) [[[AVCaptureDeviceInput alloc] initWithDevice:video_device error:&error] autorelease]; } else { capture_input = (AVCaptureInput*) video_device; } if (!capture_input) { av_log(s, AV_LOG_ERROR, "Failed to create AV capture input device: %s\n", [[error localizedDescription] UTF8String]); return 1; } if ([ctx->capture_session canAddInput:capture_input]) { [ctx->capture_session addInput:capture_input]; } else { av_log(s, AV_LOG_ERROR, "can't add video input to capture session\n"); return 1; } // Attaching output ctx->video_output = [[AVCaptureVideoDataOutput alloc] init]; if (!ctx->video_output) { av_log(s, AV_LOG_ERROR, "Failed to init AV video output\n"); return 1; } // Configure device framerate and video size @try { if ((ret = configure_video_device(s, video_device)) < 0) { return ret; } } @catch (NSException *exception) { if (![[exception name] isEqualToString:NSUndefinedKeyException]) { av_log (s, AV_LOG_ERROR, "An error occurred: %s", [exception.reason UTF8String]); return AVERROR_EXTERNAL; } } // select pixel format pxl_fmt_spec.ff_id = AV_PIX_FMT_NONE; for (int i = 0; avf_pixel_formats[i].ff_id != AV_PIX_FMT_NONE; i++) { if (ctx->pixel_format == avf_pixel_formats[i].ff_id) { pxl_fmt_spec = avf_pixel_formats[i]; break; } } // check if selected pixel format is supported by AVFoundation if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) { av_log(s, AV_LOG_ERROR, "Selected pixel format (%s) is not supported by AVFoundation.\n", av_get_pix_fmt_name(pxl_fmt_spec.ff_id)); return 1; } // check if the pixel format is available for this device if ([[ctx->video_output availableVideoCVPixelFormatTypes] indexOfObject:[NSNumber numberWithInt:pxl_fmt_spec.avf_id]] == NSNotFound) { av_log(s, AV_LOG_ERROR, "Selected pixel format (%s) is not supported by the input device.\n", av_get_pix_fmt_name(pxl_fmt_spec.ff_id)); pxl_fmt_spec.ff_id = AV_PIX_FMT_NONE; av_log(s, AV_LOG_ERROR, "Supported pixel formats:\n"); for (NSNumber *pxl_fmt in [ctx->video_output availableVideoCVPixelFormatTypes]) { struct AVFPixelFormatSpec pxl_fmt_dummy; pxl_fmt_dummy.ff_id = AV_PIX_FMT_NONE; for (int i = 0; avf_pixel_formats[i].ff_id != AV_PIX_FMT_NONE; i++) { if ([pxl_fmt intValue] == avf_pixel_formats[i].avf_id) { pxl_fmt_dummy = avf_pixel_formats[i]; break; } } if (pxl_fmt_dummy.ff_id != AV_PIX_FMT_NONE) { av_log(s, AV_LOG_ERROR, " %s\n", av_get_pix_fmt_name(pxl_fmt_dummy.ff_id)); // select first supported pixel format instead of user selected (or default) pixel format if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) { pxl_fmt_spec = pxl_fmt_dummy; } } } // fail if there is no appropriate pixel format or print a warning about overriding the pixel format if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) { return 1; } else { av_log(s, AV_LOG_WARNING, "Overriding selected pixel format to use %s instead.\n", av_get_pix_fmt_name(pxl_fmt_spec.ff_id)); } } // set videoSettings to an empty dict for receiving raw data of muxed devices if (ctx->capture_raw_data) { ctx->pixel_format = pxl_fmt_spec.ff_id; ctx->video_output.videoSettings = @{ }; } else { ctx->pixel_format = pxl_fmt_spec.ff_id; pixel_format = [NSNumber numberWithUnsignedInt:pxl_fmt_spec.avf_id]; capture_dict = [NSDictionary dictionaryWithObject:pixel_format forKey:(id)kCVPixelBufferPixelFormatTypeKey]; [ctx->video_output setVideoSettings:capture_dict]; } [ctx->video_output setAlwaysDiscardsLateVideoFrames:ctx->drop_late_frames]; #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 // check for transport control support and set observer device if supported if (!ctx->video_is_screen) { int trans_ctrl = [video_device transportControlsSupported]; AVCaptureDeviceTransportControlsPlaybackMode trans_mode = [video_device transportControlsPlaybackMode]; if (trans_ctrl) { ctx->observed_mode = trans_mode; ctx->observed_device = video_device; } } #endif ctx->avf_delegate = [[AVFFrameReceiver alloc] initWithContext:ctx]; queue = dispatch_queue_create("avf_queue", NULL); [ctx->video_output setSampleBufferDelegate:ctx->avf_delegate queue:queue]; dispatch_release(queue); if ([ctx->capture_session canAddOutput:ctx->video_output]) { [ctx->capture_session addOutput:ctx->video_output]; } else { av_log(s, AV_LOG_ERROR, "can't add video output to capture session\n"); return 1; } return 0; } static int add_audio_device(AVFormatContext *s, AVCaptureDevice *audio_device) { AVFContext *ctx = (AVFContext*)s->priv_data; NSError *error = nil; AVCaptureDeviceInput* audio_dev_input = [[[AVCaptureDeviceInput alloc] initWithDevice:audio_device error:&error] autorelease]; dispatch_queue_t queue; if (!audio_dev_input) { av_log(s, AV_LOG_ERROR, "Failed to create AV capture input device: %s\n", [[error localizedDescription] UTF8String]); return 1; } if ([ctx->capture_session canAddInput:audio_dev_input]) { [ctx->capture_session addInput:audio_dev_input]; } else { av_log(s, AV_LOG_ERROR, "can't add audio input to capture session\n"); return 1; } // Attaching output ctx->audio_output = [[AVCaptureAudioDataOutput alloc] init]; if (!ctx->audio_output) { av_log(s, AV_LOG_ERROR, "Failed to init AV audio output\n"); return 1; } ctx->avf_audio_delegate = [[AVFAudioReceiver alloc] initWithContext:ctx]; queue = dispatch_queue_create("avf_audio_queue", NULL); [ctx->audio_output setSampleBufferDelegate:ctx->avf_audio_delegate queue:queue]; dispatch_release(queue); if ([ctx->capture_session canAddOutput:ctx->audio_output]) { [ctx->capture_session addOutput:ctx->audio_output]; } else { av_log(s, AV_LOG_ERROR, "adding audio output to capture session failed\n"); return 1; } return 0; } static int get_video_config(AVFormatContext *s) { AVFContext *ctx = (AVFContext*)s->priv_data; CVImageBufferRef image_buffer; CMBlockBufferRef block_buffer; CGSize image_buffer_size; AVStream* stream = avformat_new_stream(s, NULL); if (!stream) { return 1; } // Take stream info from the first frame. while (ctx->frames_captured < 1) { CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, YES); } lock_frames(ctx); ctx->video_stream_index = stream->index; avpriv_set_pts_info(stream, 64, 1, avf_time_base); image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame); block_buffer = CMSampleBufferGetDataBuffer(ctx->current_frame); if (image_buffer) { image_buffer_size = CVImageBufferGetEncodedSize(image_buffer); stream->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO; stream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; stream->codecpar->width = (int)image_buffer_size.width; stream->codecpar->height = (int)image_buffer_size.height; stream->codecpar->format = ctx->pixel_format; } else { stream->codecpar->codec_id = AV_CODEC_ID_DVVIDEO; stream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; stream->codecpar->format = ctx->pixel_format; } CFRelease(ctx->current_frame); ctx->current_frame = nil; unlock_frames(ctx); return 0; } static int get_audio_config(AVFormatContext *s) { AVFContext *ctx = (AVFContext*)s->priv_data; CMFormatDescriptionRef format_desc; AVStream* stream = avformat_new_stream(s, NULL); if (!stream) { return 1; } // Take stream info from the first frame. while (ctx->audio_frames_captured < 1) { CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, YES); } lock_frames(ctx); ctx->audio_stream_index = stream->index; avpriv_set_pts_info(stream, 64, 1, avf_time_base); format_desc = CMSampleBufferGetFormatDescription(ctx->current_audio_frame); const AudioStreamBasicDescription *basic_desc = CMAudioFormatDescriptionGetStreamBasicDescription(format_desc); if (!basic_desc) { unlock_frames(ctx); av_log(s, AV_LOG_ERROR, "audio format not available\n"); return 1; } stream->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; stream->codecpar->sample_rate = basic_desc->mSampleRate; stream->codecpar->channels = basic_desc->mChannelsPerFrame; stream->codecpar->channel_layout = av_get_default_channel_layout(stream->codecpar->channels); ctx->audio_channels = basic_desc->mChannelsPerFrame; ctx->audio_bits_per_sample = basic_desc->mBitsPerChannel; ctx->audio_float = basic_desc->mFormatFlags & kAudioFormatFlagIsFloat; ctx->audio_be = basic_desc->mFormatFlags & kAudioFormatFlagIsBigEndian; ctx->audio_signed_integer = basic_desc->mFormatFlags & kAudioFormatFlagIsSignedInteger; ctx->audio_packed = basic_desc->mFormatFlags & kAudioFormatFlagIsPacked; ctx->audio_non_interleaved = basic_desc->mFormatFlags & kAudioFormatFlagIsNonInterleaved; if (basic_desc->mFormatID == kAudioFormatLinearPCM && ctx->audio_float && ctx->audio_bits_per_sample == 32 && ctx->audio_packed) { stream->codecpar->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE; } else if (basic_desc->mFormatID == kAudioFormatLinearPCM && ctx->audio_signed_integer && ctx->audio_bits_per_sample == 16 && ctx->audio_packed) { stream->codecpar->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE; } else if (basic_desc->mFormatID == kAudioFormatLinearPCM && ctx->audio_signed_integer && ctx->audio_bits_per_sample == 24 && ctx->audio_packed) { stream->codecpar->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE; } else if (basic_desc->mFormatID == kAudioFormatLinearPCM && ctx->audio_signed_integer && ctx->audio_bits_per_sample == 32 && ctx->audio_packed) { stream->codecpar->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE; } else { unlock_frames(ctx); av_log(s, AV_LOG_ERROR, "audio format is not supported\n"); return 1; } if (ctx->audio_non_interleaved) { CMBlockBufferRef block_buffer = CMSampleBufferGetDataBuffer(ctx->current_audio_frame); ctx->audio_buffer_size = CMBlockBufferGetDataLength(block_buffer); ctx->audio_buffer = av_malloc(ctx->audio_buffer_size); if (!ctx->audio_buffer) { unlock_frames(ctx); av_log(s, AV_LOG_ERROR, "error allocating audio buffer\n"); return 1; } } CFRelease(ctx->current_audio_frame); ctx->current_audio_frame = nil; unlock_frames(ctx); return 0; } static int avf_read_header(AVFormatContext *s) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; uint32_t num_screens = 0; AVFContext *ctx = (AVFContext*)s->priv_data; AVCaptureDevice *video_device = nil; AVCaptureDevice *audio_device = nil; // Find capture device NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]; NSArray *devices_muxed = [AVCaptureDevice devicesWithMediaType:AVMediaTypeMuxed]; ctx->num_video_devices = [devices count] + [devices_muxed count]; pthread_mutex_init(&ctx->frame_lock, NULL); #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 CGGetActiveDisplayList(0, NULL, &num_screens); #endif // List devices if requested if (ctx->list_devices) { int index = 0; av_log(ctx, AV_LOG_INFO, "AVFoundation video devices:\n"); for (AVCaptureDevice *device in devices) { const char *name = [[device localizedName] UTF8String]; index = [devices indexOfObject:device]; av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name); } for (AVCaptureDevice *device in devices_muxed) { const char *name = [[device localizedName] UTF8String]; index = [devices count] + [devices_muxed indexOfObject:device]; av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name); } #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 if (num_screens > 0) { CGDirectDisplayID screens[num_screens]; CGGetActiveDisplayList(num_screens, screens, &num_screens); for (int i = 0; i < num_screens; i++) { av_log(ctx, AV_LOG_INFO, "[%d] Capture screen %d\n", ctx->num_video_devices + i, i); } } #endif av_log(ctx, AV_LOG_INFO, "AVFoundation audio devices:\n"); devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio]; for (AVCaptureDevice *device in devices) { const char *name = [[device localizedName] UTF8String]; int index = [devices indexOfObject:device]; av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name); } goto fail; } // parse input filename for video and audio device parse_device_name(s); // check for device index given in filename if (ctx->video_device_index == -1 && ctx->video_filename) { sscanf(ctx->video_filename, "%d", &ctx->video_device_index); } if (ctx->audio_device_index == -1 && ctx->audio_filename) { sscanf(ctx->audio_filename, "%d", &ctx->audio_device_index); } if (ctx->video_device_index >= 0) { if (ctx->video_device_index < ctx->num_video_devices) { if (ctx->video_device_index < [devices count]) { video_device = [devices objectAtIndex:ctx->video_device_index]; } else { video_device = [devices_muxed objectAtIndex:(ctx->video_device_index - [devices count])]; ctx->video_is_muxed = 1; } } else if (ctx->video_device_index < ctx->num_video_devices + num_screens) { #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 CGDirectDisplayID screens[num_screens]; CGGetActiveDisplayList(num_screens, screens, &num_screens); AVCaptureScreenInput* capture_screen_input = [[[AVCaptureScreenInput alloc] initWithDisplayID:screens[ctx->video_device_index - ctx->num_video_devices]] autorelease]; if (ctx->framerate.num > 0) { capture_screen_input.minFrameDuration = CMTimeMake(ctx->framerate.den, ctx->framerate.num); } #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080 if (ctx->capture_cursor) { capture_screen_input.capturesCursor = YES; } else { capture_screen_input.capturesCursor = NO; } #endif if (ctx->capture_mouse_clicks) { capture_screen_input.capturesMouseClicks = YES; } else { capture_screen_input.capturesMouseClicks = NO; } video_device = (AVCaptureDevice*) capture_screen_input; ctx->video_is_screen = 1; #endif } else { av_log(ctx, AV_LOG_ERROR, "Invalid device index\n"); goto fail; } } else if (ctx->video_filename && strncmp(ctx->video_filename, "none", 4)) { if (!strncmp(ctx->video_filename, "default", 7)) { video_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; } else { // looking for video inputs for (AVCaptureDevice *device in devices) { if (!strncmp(ctx->video_filename, [[device localizedName] UTF8String], strlen(ctx->video_filename))) { video_device = device; break; } } // looking for muxed inputs for (AVCaptureDevice *device in devices_muxed) { if (!strncmp(ctx->video_filename, [[device localizedName] UTF8String], strlen(ctx->video_filename))) { video_device = device; ctx->video_is_muxed = 1; break; } } #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 // looking for screen inputs if (!video_device) { int idx; if(sscanf(ctx->video_filename, "Capture screen %d", &idx) && idx < num_screens) { CGDirectDisplayID screens[num_screens]; CGGetActiveDisplayList(num_screens, screens, &num_screens); AVCaptureScreenInput* capture_screen_input = [[[AVCaptureScreenInput alloc] initWithDisplayID:screens[idx]] autorelease]; video_device = (AVCaptureDevice*) capture_screen_input; ctx->video_device_index = ctx->num_video_devices + idx; ctx->video_is_screen = 1; if (ctx->framerate.num > 0) { capture_screen_input.minFrameDuration = CMTimeMake(ctx->framerate.den, ctx->framerate.num); } #if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080 if (ctx->capture_cursor) { capture_screen_input.capturesCursor = YES; } else { capture_screen_input.capturesCursor = NO; } #endif if (ctx->capture_mouse_clicks) { capture_screen_input.capturesMouseClicks = YES; } else { capture_screen_input.capturesMouseClicks = NO; } } } #endif } if (!video_device) { av_log(ctx, AV_LOG_ERROR, "Video device not found\n"); goto fail; } } // get audio device if (ctx->audio_device_index >= 0) { NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio]; if (ctx->audio_device_index >= [devices count]) { av_log(ctx, AV_LOG_ERROR, "Invalid audio device index\n"); goto fail; } audio_device = [devices objectAtIndex:ctx->audio_device_index]; } else if (ctx->audio_filename && strncmp(ctx->audio_filename, "none", 4)) { if (!strncmp(ctx->audio_filename, "default", 7)) { audio_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio]; } else { NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio]; for (AVCaptureDevice *device in devices) { if (!strncmp(ctx->audio_filename, [[device localizedName] UTF8String], strlen(ctx->audio_filename))) { audio_device = device; break; } } } if (!audio_device) { av_log(ctx, AV_LOG_ERROR, "Audio device not found\n"); goto fail; } } // Video nor Audio capture device not found, looking for AVMediaTypeVideo/Audio if (!video_device && !audio_device) { av_log(s, AV_LOG_ERROR, "No AV capture device found\n"); goto fail; } if (video_device) { if (ctx->video_device_index < ctx->num_video_devices) { av_log(s, AV_LOG_DEBUG, "'%s' opened\n", [[video_device localizedName] UTF8String]); } else { av_log(s, AV_LOG_DEBUG, "'%s' opened\n", [[video_device description] UTF8String]); } } if (audio_device) { av_log(s, AV_LOG_DEBUG, "audio device '%s' opened\n", [[audio_device localizedName] UTF8String]); } // Initialize capture session ctx->capture_session = [[AVCaptureSession alloc] init]; if (video_device && add_video_device(s, video_device)) { goto fail; } if (audio_device && add_audio_device(s, audio_device)) { } [ctx->capture_session startRunning]; /* Unlock device configuration only after the session is started so it * does not reset the capture formats */ if (!ctx->video_is_screen) { [video_device unlockForConfiguration]; } if (video_device && get_video_config(s)) { goto fail; } // set audio stream if (audio_device && get_audio_config(s)) { goto fail; } [pool release]; return 0; fail: [pool release]; destroy_context(ctx); return AVERROR(EIO); } static int copy_cvpixelbuffer(AVFormatContext *s, CVPixelBufferRef image_buffer, AVPacket *pkt) { AVFContext *ctx = s->priv_data; int src_linesize[4]; const uint8_t *src_data[4]; int width = CVPixelBufferGetWidth(image_buffer); int height = CVPixelBufferGetHeight(image_buffer); int status; memset(src_linesize, 0, sizeof(src_linesize)); memset(src_data, 0, sizeof(src_data)); status = CVPixelBufferLockBaseAddress(image_buffer, 0); if (status != kCVReturnSuccess) { av_log(s, AV_LOG_ERROR, "Could not lock base address: %d (%dx%d)\n", status, width, height); return AVERROR_EXTERNAL; } if (CVPixelBufferIsPlanar(image_buffer)) { size_t plane_count = CVPixelBufferGetPlaneCount(image_buffer); int i; for(i = 0; i < plane_count; i++){ src_linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(image_buffer, i); src_data[i] = CVPixelBufferGetBaseAddressOfPlane(image_buffer, i); } } else { src_linesize[0] = CVPixelBufferGetBytesPerRow(image_buffer); src_data[0] = CVPixelBufferGetBaseAddress(image_buffer); } status = av_image_copy_to_buffer(pkt->data, pkt->size, src_data, src_linesize, ctx->pixel_format, width, height, 1); CVPixelBufferUnlockBaseAddress(image_buffer, 0); return status; } static int avf_read_packet(AVFormatContext *s, AVPacket *pkt) { AVFContext* ctx = (AVFContext*)s->priv_data; do { CVImageBufferRef image_buffer; CMBlockBufferRef block_buffer; lock_frames(ctx); if (ctx->current_frame != nil) { int status; int length = 0; image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame); block_buffer = CMSampleBufferGetDataBuffer(ctx->current_frame); if (image_buffer != nil) { length = (int)CVPixelBufferGetDataSize(image_buffer); } else if (block_buffer != nil) { length = (int)CMBlockBufferGetDataLength(block_buffer); } else { unlock_frames(ctx); return AVERROR(EINVAL); } if (av_new_packet(pkt, length) < 0) { unlock_frames(ctx); return AVERROR(EIO); } CMItemCount count; CMSampleTimingInfo timing_info; if (CMSampleBufferGetOutputSampleTimingInfoArray(ctx->current_frame, 1, &timing_info, &count) == noErr) { AVRational timebase_q = av_make_q(1, timing_info.presentationTimeStamp.timescale); pkt->pts = pkt->dts = av_rescale_q(timing_info.presentationTimeStamp.value, timebase_q, avf_time_base_q); } pkt->stream_index = ctx->video_stream_index; pkt->flags |= AV_PKT_FLAG_KEY; if (image_buffer) { status = copy_cvpixelbuffer(s, image_buffer, pkt); } else { status = 0; OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, pkt->data); if (ret != kCMBlockBufferNoErr) { status = AVERROR(EIO); } } CFRelease(ctx->current_frame); ctx->current_frame = nil; if (status < 0) { unlock_frames(ctx); return status; } } else if (ctx->current_audio_frame != nil) { CMBlockBufferRef block_buffer = CMSampleBufferGetDataBuffer(ctx->current_audio_frame); int block_buffer_size = CMBlockBufferGetDataLength(block_buffer); if (!block_buffer || !block_buffer_size) { unlock_frames(ctx); return AVERROR(EIO); } if (ctx->audio_non_interleaved && block_buffer_size > ctx->audio_buffer_size) { unlock_frames(ctx); return AVERROR_BUFFER_TOO_SMALL; } if (av_new_packet(pkt, block_buffer_size) < 0) { unlock_frames(ctx); return AVERROR(EIO); } CMItemCount count; CMSampleTimingInfo timing_info; if (CMSampleBufferGetOutputSampleTimingInfoArray(ctx->current_audio_frame, 1, &timing_info, &count) == noErr) { AVRational timebase_q = av_make_q(1, timing_info.presentationTimeStamp.timescale); pkt->pts = pkt->dts = av_rescale_q(timing_info.presentationTimeStamp.value, timebase_q, avf_time_base_q); } pkt->stream_index = ctx->audio_stream_index; pkt->flags |= AV_PKT_FLAG_KEY; if (ctx->audio_non_interleaved) { int sample, c, shift, num_samples; OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, ctx->audio_buffer); if (ret != kCMBlockBufferNoErr) { unlock_frames(ctx); return AVERROR(EIO); } num_samples = pkt->size / (ctx->audio_channels * (ctx->audio_bits_per_sample >> 3)); // transform decoded frame into output format #define INTERLEAVE_OUTPUT(bps) \ { \ int##bps##_t **src; \ int##bps##_t *dest; \ src = av_malloc(ctx->audio_channels * sizeof(int##bps##_t*)); \ if (!src) { \ unlock_frames(ctx); \ return AVERROR(EIO); \ } \ \ for (c = 0; c < ctx->audio_channels; c++) { \ src[c] = ((int##bps##_t*)ctx->audio_buffer) + c * num_samples; \ } \ dest = (int##bps##_t*)pkt->data; \ shift = bps - ctx->audio_bits_per_sample; \ for (sample = 0; sample < num_samples; sample++) \ for (c = 0; c < ctx->audio_channels; c++) \ *dest++ = src[c][sample] << shift; \ av_freep(&src); \ } if (ctx->audio_bits_per_sample <= 16) { INTERLEAVE_OUTPUT(16) } else { INTERLEAVE_OUTPUT(32) } } else { OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, pkt->data); if (ret != kCMBlockBufferNoErr) { unlock_frames(ctx); return AVERROR(EIO); } } CFRelease(ctx->current_audio_frame); ctx->current_audio_frame = nil; } else { pkt->data = NULL; unlock_frames(ctx); if (ctx->observed_quit) { return AVERROR_EOF; } else { return AVERROR(EAGAIN); } } unlock_frames(ctx); } while (!pkt->data); return 0; } static int avf_close(AVFormatContext *s) { AVFContext* ctx = (AVFContext*)s->priv_data; destroy_context(ctx); return 0; } static const AVOption options[] = { { "list_devices", "list available devices", offsetof(AVFContext, list_devices), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, { "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 }, { "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 }, { "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}, { "framerate", "set frame rate", offsetof(AVFContext, framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "ntsc"}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, { "video_size", "set video size", offsetof(AVFContext, width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM }, { "capture_cursor", "capture the screen cursor", offsetof(AVFContext, capture_cursor), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, { "capture_mouse_clicks", "capture the screen mouse clicks", offsetof(AVFContext, capture_mouse_clicks), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, { "capture_raw_data", "capture the raw data from device connection", offsetof(AVFContext, capture_raw_data), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, { "drop_late_frames", "drop frames that are available later than expected", offsetof(AVFContext, drop_late_frames), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, { NULL }, }; static const AVClass avf_class = { .class_name = "AVFoundation indev", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT, }; const AVInputFormat ff_avfoundation_demuxer = { .name = "avfoundation", .long_name = NULL_IF_CONFIG_SMALL("AVFoundation input device"), .priv_data_size = sizeof(AVFContext), .read_header = avf_read_header, .read_packet = avf_read_packet, .read_close = avf_close, .flags = AVFMT_NOFILE, .priv_class = &avf_class, };