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- /*
- * AVFoundation input device
- * Copyright (c) 2014 Thilo Borgmann <thilo.borgmann@mail.de>
- *
- * 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 <thilo.borgmann@mail.de>
- */
- #import <AVFoundation/AVFoundation.h>
- #include <pthread.h>
- #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 int parse_device_name(AVFormatContext *s)
- {
- AVFContext *ctx = (AVFContext*)s->priv_data;
- char *save;
- ctx->url = av_strdup(s->url);
- if (!ctx->url)
- return AVERROR(ENOMEM);
- 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);
- }
- return 0;
- }
- /**
- * 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;
- av_channel_layout_default(&stream->codecpar->ch_layout, basic_desc->mChannelsPerFrame);
- 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)
- {
- int ret = 0;
- 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
- ret = parse_device_name(s);
- if (ret)
- goto fail;
- // 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);
- if (ret)
- return ret;
- 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,
- };
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