1050 lines
37 KiB
Objective-C
1050 lines
37 KiB
Objective-C
/*
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* AVFoundation input device
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* Copyright (c) 2014 Thilo Borgmann <thilo.borgmann@mail.de>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* AVFoundation input device
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* @author Thilo Borgmann <thilo.borgmann@mail.de>
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*/
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#import <AVFoundation/AVFoundation.h>
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#include <pthread.h>
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#include "libavutil/pixdesc.h"
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#include "libavutil/opt.h"
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#include "libavutil/avstring.h"
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#include "libavformat/internal.h"
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#include "libavutil/internal.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/time.h"
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#include "avdevice.h"
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static const int avf_time_base = 1000000;
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static const AVRational avf_time_base_q = {
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.num = 1,
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.den = avf_time_base
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};
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struct AVFPixelFormatSpec {
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enum AVPixelFormat ff_id;
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OSType avf_id;
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};
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static const struct AVFPixelFormatSpec avf_pixel_formats[] = {
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{ AV_PIX_FMT_MONOBLACK, kCVPixelFormatType_1Monochrome },
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{ AV_PIX_FMT_RGB555BE, kCVPixelFormatType_16BE555 },
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{ AV_PIX_FMT_RGB555LE, kCVPixelFormatType_16LE555 },
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{ AV_PIX_FMT_RGB565BE, kCVPixelFormatType_16BE565 },
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{ AV_PIX_FMT_RGB565LE, kCVPixelFormatType_16LE565 },
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{ AV_PIX_FMT_RGB24, kCVPixelFormatType_24RGB },
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{ AV_PIX_FMT_BGR24, kCVPixelFormatType_24BGR },
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{ AV_PIX_FMT_0RGB, kCVPixelFormatType_32ARGB },
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{ AV_PIX_FMT_BGR0, kCVPixelFormatType_32BGRA },
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{ AV_PIX_FMT_0BGR, kCVPixelFormatType_32ABGR },
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{ AV_PIX_FMT_RGB0, kCVPixelFormatType_32RGBA },
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{ AV_PIX_FMT_BGR48BE, kCVPixelFormatType_48RGB },
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{ AV_PIX_FMT_UYVY422, kCVPixelFormatType_422YpCbCr8 },
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{ AV_PIX_FMT_YUVA444P, kCVPixelFormatType_4444YpCbCrA8R },
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{ AV_PIX_FMT_YUVA444P16LE, kCVPixelFormatType_4444AYpCbCr16 },
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{ AV_PIX_FMT_YUV444P, kCVPixelFormatType_444YpCbCr8 },
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{ AV_PIX_FMT_YUV422P16, kCVPixelFormatType_422YpCbCr16 },
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{ AV_PIX_FMT_YUV422P10, kCVPixelFormatType_422YpCbCr10 },
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{ AV_PIX_FMT_YUV444P10, kCVPixelFormatType_444YpCbCr10 },
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{ AV_PIX_FMT_YUV420P, kCVPixelFormatType_420YpCbCr8Planar },
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{ AV_PIX_FMT_NV12, kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange },
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{ AV_PIX_FMT_YUYV422, kCVPixelFormatType_422YpCbCr8_yuvs },
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#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
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{ AV_PIX_FMT_GRAY8, kCVPixelFormatType_OneComponent8 },
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#endif
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{ AV_PIX_FMT_NONE, 0 }
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};
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typedef struct
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{
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AVClass* class;
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int frames_captured;
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int audio_frames_captured;
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int64_t first_pts;
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int64_t first_audio_pts;
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pthread_mutex_t frame_lock;
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pthread_cond_t frame_wait_cond;
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id avf_delegate;
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id avf_audio_delegate;
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AVRational framerate;
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int width, height;
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int capture_cursor;
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int capture_mouse_clicks;
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int list_devices;
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int video_device_index;
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int video_stream_index;
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int audio_device_index;
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int audio_stream_index;
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char *video_filename;
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char *audio_filename;
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int num_video_devices;
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int audio_channels;
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int audio_bits_per_sample;
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int audio_float;
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int audio_be;
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int audio_signed_integer;
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int audio_packed;
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int audio_non_interleaved;
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int32_t *audio_buffer;
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int audio_buffer_size;
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enum AVPixelFormat pixel_format;
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AVCaptureSession *capture_session;
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AVCaptureVideoDataOutput *video_output;
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AVCaptureAudioDataOutput *audio_output;
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CMSampleBufferRef current_frame;
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CMSampleBufferRef current_audio_frame;
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} AVFContext;
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static void lock_frames(AVFContext* ctx)
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{
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pthread_mutex_lock(&ctx->frame_lock);
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}
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static void unlock_frames(AVFContext* ctx)
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{
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pthread_mutex_unlock(&ctx->frame_lock);
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}
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/** FrameReciever class - delegate for AVCaptureSession
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*/
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@interface AVFFrameReceiver : NSObject
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{
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AVFContext* _context;
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}
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- (id)initWithContext:(AVFContext*)context;
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- (void) captureOutput:(AVCaptureOutput *)captureOutput
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didOutputSampleBuffer:(CMSampleBufferRef)videoFrame
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fromConnection:(AVCaptureConnection *)connection;
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@end
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@implementation AVFFrameReceiver
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- (id)initWithContext:(AVFContext*)context
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{
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if (self = [super init]) {
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_context = context;
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}
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return self;
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}
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- (void) captureOutput:(AVCaptureOutput *)captureOutput
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didOutputSampleBuffer:(CMSampleBufferRef)videoFrame
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fromConnection:(AVCaptureConnection *)connection
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{
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lock_frames(_context);
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if (_context->current_frame != nil) {
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CFRelease(_context->current_frame);
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}
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_context->current_frame = (CMSampleBufferRef)CFRetain(videoFrame);
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pthread_cond_signal(&_context->frame_wait_cond);
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unlock_frames(_context);
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++_context->frames_captured;
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}
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@end
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/** AudioReciever class - delegate for AVCaptureSession
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*/
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@interface AVFAudioReceiver : NSObject
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{
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AVFContext* _context;
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}
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- (id)initWithContext:(AVFContext*)context;
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- (void) captureOutput:(AVCaptureOutput *)captureOutput
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didOutputSampleBuffer:(CMSampleBufferRef)audioFrame
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fromConnection:(AVCaptureConnection *)connection;
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@end
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@implementation AVFAudioReceiver
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- (id)initWithContext:(AVFContext*)context
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{
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if (self = [super init]) {
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_context = context;
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}
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return self;
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}
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- (void) captureOutput:(AVCaptureOutput *)captureOutput
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didOutputSampleBuffer:(CMSampleBufferRef)audioFrame
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fromConnection:(AVCaptureConnection *)connection
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{
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lock_frames(_context);
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if (_context->current_audio_frame != nil) {
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CFRelease(_context->current_audio_frame);
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}
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_context->current_audio_frame = (CMSampleBufferRef)CFRetain(audioFrame);
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pthread_cond_signal(&_context->frame_wait_cond);
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unlock_frames(_context);
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++_context->audio_frames_captured;
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}
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@end
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static void destroy_context(AVFContext* ctx)
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{
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[ctx->capture_session stopRunning];
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[ctx->capture_session release];
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[ctx->video_output release];
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[ctx->audio_output release];
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[ctx->avf_delegate release];
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[ctx->avf_audio_delegate release];
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ctx->capture_session = NULL;
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ctx->video_output = NULL;
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ctx->audio_output = NULL;
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ctx->avf_delegate = NULL;
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ctx->avf_audio_delegate = NULL;
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av_freep(&ctx->audio_buffer);
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pthread_mutex_destroy(&ctx->frame_lock);
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pthread_cond_destroy(&ctx->frame_wait_cond);
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if (ctx->current_frame) {
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CFRelease(ctx->current_frame);
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}
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}
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static void parse_device_name(AVFormatContext *s)
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{
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AVFContext *ctx = (AVFContext*)s->priv_data;
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char *tmp = av_strdup(s->filename);
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char *save;
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if (tmp[0] != ':') {
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ctx->video_filename = av_strtok(tmp, ":", &save);
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ctx->audio_filename = av_strtok(NULL, ":", &save);
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} else {
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ctx->audio_filename = av_strtok(tmp, ":", &save);
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}
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}
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/**
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* Configure the video device.
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*
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* Configure the video device using a run-time approach to access properties
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* since formats, activeFormat are available since iOS >= 7.0 or OSX >= 10.7
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* and activeVideoMaxFrameDuration is available since i0S >= 7.0 and OSX >= 10.9.
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*
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* The NSUndefinedKeyException must be handled by the caller of this function.
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*
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*/
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static int configure_video_device(AVFormatContext *s, AVCaptureDevice *video_device)
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{
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AVFContext *ctx = (AVFContext*)s->priv_data;
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double framerate = av_q2d(ctx->framerate);
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NSObject *range = nil;
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NSObject *format = nil;
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NSObject *selected_range = nil;
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NSObject *selected_format = nil;
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for (format in [video_device valueForKey:@"formats"]) {
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CMFormatDescriptionRef formatDescription;
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CMVideoDimensions dimensions;
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formatDescription = (CMFormatDescriptionRef) [format performSelector:@selector(formatDescription)];
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dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
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if ((ctx->width == 0 && ctx->height == 0) ||
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(dimensions.width == ctx->width && dimensions.height == ctx->height)) {
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selected_format = format;
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for (range in [format valueForKey:@"videoSupportedFrameRateRanges"]) {
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double max_framerate;
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[[range valueForKey:@"maxFrameRate"] getValue:&max_framerate];
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if (fabs (framerate - max_framerate) < 0.01) {
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selected_range = range;
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break;
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}
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}
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}
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}
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if (!selected_format) {
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av_log(s, AV_LOG_ERROR, "Selected video size (%dx%d) is not supported by the device\n",
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ctx->width, ctx->height);
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goto unsupported_format;
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}
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if (!selected_range) {
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av_log(s, AV_LOG_ERROR, "Selected framerate (%f) is not supported by the device\n",
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framerate);
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goto unsupported_format;
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}
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if ([video_device lockForConfiguration:NULL] == YES) {
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NSValue *min_frame_duration = [selected_range valueForKey:@"minFrameDuration"];
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[video_device setValue:selected_format forKey:@"activeFormat"];
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[video_device setValue:min_frame_duration forKey:@"activeVideoMinFrameDuration"];
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[video_device setValue:min_frame_duration forKey:@"activeVideoMaxFrameDuration"];
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} else {
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av_log(s, AV_LOG_ERROR, "Could not lock device for configuration");
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return AVERROR(EINVAL);
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}
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return 0;
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unsupported_format:
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av_log(s, AV_LOG_ERROR, "Supported modes:\n");
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for (format in [video_device valueForKey:@"formats"]) {
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CMFormatDescriptionRef formatDescription;
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CMVideoDimensions dimensions;
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formatDescription = (CMFormatDescriptionRef) [format performSelector:@selector(formatDescription)];
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dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
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for (range in [format valueForKey:@"videoSupportedFrameRateRanges"]) {
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double min_framerate;
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double max_framerate;
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[[range valueForKey:@"minFrameRate"] getValue:&min_framerate];
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[[range valueForKey:@"maxFrameRate"] getValue:&max_framerate];
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av_log(s, AV_LOG_ERROR, " %dx%d@[%f %f]fps\n",
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dimensions.width, dimensions.height,
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min_framerate, max_framerate);
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}
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}
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return AVERROR(EINVAL);
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}
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static int add_video_device(AVFormatContext *s, AVCaptureDevice *video_device)
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{
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AVFContext *ctx = (AVFContext*)s->priv_data;
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int ret;
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NSError *error = nil;
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AVCaptureInput* capture_input = nil;
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struct AVFPixelFormatSpec pxl_fmt_spec;
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NSNumber *pixel_format;
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NSDictionary *capture_dict;
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dispatch_queue_t queue;
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if (ctx->video_device_index < ctx->num_video_devices) {
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capture_input = (AVCaptureInput*) [[[AVCaptureDeviceInput alloc] initWithDevice:video_device error:&error] autorelease];
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} else {
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capture_input = (AVCaptureInput*) video_device;
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}
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if (!capture_input) {
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av_log(s, AV_LOG_ERROR, "Failed to create AV capture input device: %s\n",
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[[error localizedDescription] UTF8String]);
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return 1;
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}
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if ([ctx->capture_session canAddInput:capture_input]) {
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[ctx->capture_session addInput:capture_input];
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} else {
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av_log(s, AV_LOG_ERROR, "can't add video input to capture session\n");
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return 1;
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}
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// Attaching output
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ctx->video_output = [[AVCaptureVideoDataOutput alloc] init];
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if (!ctx->video_output) {
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av_log(s, AV_LOG_ERROR, "Failed to init AV video output\n");
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return 1;
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}
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// Configure device framerate and video size
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@try {
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if ((ret = configure_video_device(s, video_device)) < 0) {
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return ret;
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}
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} @catch (NSException *exception) {
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if (![[exception name] isEqualToString:NSUndefinedKeyException]) {
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av_log (s, AV_LOG_ERROR, "An error occurred: %s", [exception.reason UTF8String]);
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return AVERROR_EXTERNAL;
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}
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}
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// select pixel format
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pxl_fmt_spec.ff_id = AV_PIX_FMT_NONE;
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for (int i = 0; avf_pixel_formats[i].ff_id != AV_PIX_FMT_NONE; i++) {
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if (ctx->pixel_format == avf_pixel_formats[i].ff_id) {
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pxl_fmt_spec = avf_pixel_formats[i];
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break;
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}
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}
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// check if selected pixel format is supported by AVFoundation
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if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
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av_log(s, AV_LOG_ERROR, "Selected pixel format (%s) is not supported by AVFoundation.\n",
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av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
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return 1;
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}
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// check if the pixel format is available for this device
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if ([[ctx->video_output availableVideoCVPixelFormatTypes] indexOfObject:[NSNumber numberWithInt:pxl_fmt_spec.avf_id]] == NSNotFound) {
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av_log(s, AV_LOG_ERROR, "Selected pixel format (%s) is not supported by the input device.\n",
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av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
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pxl_fmt_spec.ff_id = AV_PIX_FMT_NONE;
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av_log(s, AV_LOG_ERROR, "Supported pixel formats:\n");
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for (NSNumber *pxl_fmt in [ctx->video_output availableVideoCVPixelFormatTypes]) {
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struct AVFPixelFormatSpec pxl_fmt_dummy;
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pxl_fmt_dummy.ff_id = AV_PIX_FMT_NONE;
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for (int i = 0; avf_pixel_formats[i].ff_id != AV_PIX_FMT_NONE; i++) {
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if ([pxl_fmt intValue] == avf_pixel_formats[i].avf_id) {
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pxl_fmt_dummy = avf_pixel_formats[i];
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break;
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}
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}
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if (pxl_fmt_dummy.ff_id != AV_PIX_FMT_NONE) {
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av_log(s, AV_LOG_ERROR, " %s\n", av_get_pix_fmt_name(pxl_fmt_dummy.ff_id));
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// select first supported pixel format instead of user selected (or default) pixel format
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if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
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pxl_fmt_spec = pxl_fmt_dummy;
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}
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}
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}
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// fail if there is no appropriate pixel format or print a warning about overriding the pixel format
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if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
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return 1;
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} else {
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av_log(s, AV_LOG_WARNING, "Overriding selected pixel format to use %s instead.\n",
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av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
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}
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}
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ctx->pixel_format = pxl_fmt_spec.ff_id;
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pixel_format = [NSNumber numberWithUnsignedInt:pxl_fmt_spec.avf_id];
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capture_dict = [NSDictionary dictionaryWithObject:pixel_format
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forKey:(id)kCVPixelBufferPixelFormatTypeKey];
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[ctx->video_output setVideoSettings:capture_dict];
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[ctx->video_output setAlwaysDiscardsLateVideoFrames:YES];
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ctx->avf_delegate = [[AVFFrameReceiver alloc] initWithContext:ctx];
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queue = dispatch_queue_create("avf_queue", NULL);
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[ctx->video_output setSampleBufferDelegate:ctx->avf_delegate queue:queue];
|
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dispatch_release(queue);
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|
|
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if ([ctx->capture_session canAddOutput:ctx->video_output]) {
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[ctx->capture_session addOutput:ctx->video_output];
|
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} else {
|
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av_log(s, AV_LOG_ERROR, "can't add video output to capture session\n");
|
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return 1;
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}
|
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|
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return 0;
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}
|
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|
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static int add_audio_device(AVFormatContext *s, AVCaptureDevice *audio_device)
|
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{
|
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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;
|
|
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);
|
|
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;
|
|
|
|
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) {
|
|
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 {
|
|
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) {
|
|
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];
|
|
int capture_screen = 0;
|
|
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];
|
|
ctx->num_video_devices = [devices count];
|
|
|
|
ctx->first_pts = av_gettime();
|
|
ctx->first_audio_pts = av_gettime();
|
|
|
|
pthread_mutex_init(&ctx->frame_lock, NULL);
|
|
pthread_cond_init(&ctx->frame_wait_cond, 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);
|
|
index++;
|
|
}
|
|
#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", index + 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) {
|
|
video_device = [devices objectAtIndex:ctx->video_device_index];
|
|
} 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;
|
|
capture_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;
|
|
}
|
|
}
|
|
|
|
#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;
|
|
capture_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 (!capture_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 avf_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVFContext* ctx = (AVFContext*)s->priv_data;
|
|
|
|
do {
|
|
CVImageBufferRef image_buffer;
|
|
lock_frames(ctx);
|
|
|
|
image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame);
|
|
|
|
if (ctx->current_frame != nil) {
|
|
void *data;
|
|
if (av_new_packet(pkt, (int)CVPixelBufferGetDataSize(image_buffer)) < 0) {
|
|
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;
|
|
|
|
CVPixelBufferLockBaseAddress(image_buffer, 0);
|
|
|
|
data = CVPixelBufferGetBaseAddress(image_buffer);
|
|
memcpy(pkt->data, data, pkt->size);
|
|
|
|
CVPixelBufferUnlockBaseAddress(image_buffer, 0);
|
|
CFRelease(ctx->current_frame);
|
|
ctx->current_frame = nil;
|
|
} 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) {
|
|
return AVERROR(EIO);
|
|
}
|
|
|
|
if (ctx->audio_non_interleaved && block_buffer_size > ctx->audio_buffer_size) {
|
|
return AVERROR_BUFFER_TOO_SMALL;
|
|
}
|
|
|
|
if (av_new_packet(pkt, block_buffer_size) < 0) {
|
|
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) {
|
|
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) 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) {
|
|
return AVERROR(EIO);
|
|
}
|
|
}
|
|
|
|
CFRelease(ctx->current_audio_frame);
|
|
ctx->current_audio_frame = nil;
|
|
} else {
|
|
pkt->data = NULL;
|
|
pthread_cond_wait(&ctx->frame_wait_cond, &ctx->frame_lock);
|
|
}
|
|
|
|
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_INT, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, "list_devices" },
|
|
{ "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "list_devices" },
|
|
{ "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "list_devices" },
|
|
{ "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_INT, {.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_INT, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
|
|
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass avf_class = {
|
|
.class_name = "AVFoundation input device",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
|
|
};
|
|
|
|
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,
|
|
};
|