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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/pixdesc.h"
- #include "libavutil/opt.h"
- #include "libavutil/avstring.h"
- #include "libavformat/internal.h"
- #include "libavutil/internal.h"
- #include "libavutil/time.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 __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;
- int64_t first_pts;
- int64_t first_audio_pts;
- pthread_mutex_t frame_lock;
- pthread_cond_t frame_wait_cond;
- id avf_delegate;
- id avf_audio_delegate;
- int list_devices;
- int video_device_index;
- int video_stream_index;
- int audio_device_index;
- int audio_stream_index;
- 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;
- } 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;
- }
- return self;
- }
- - (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);
- pthread_cond_signal(&_context->frame_wait_cond);
- 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);
- pthread_cond_signal(&_context->frame_wait_cond);
- 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->audio_buffer);
- pthread_mutex_destroy(&ctx->frame_lock);
- pthread_cond_destroy(&ctx->frame_wait_cond);
- if (ctx->current_frame) {
- CFRelease(ctx->current_frame);
- }
- }
- static void parse_device_name(AVFormatContext *s)
- {
- AVFContext *ctx = (AVFContext*)s->priv_data;
- char *tmp = av_strdup(s->filename);
- char *save;
- if (tmp[0] != ':') {
- ctx->video_filename = av_strtok(tmp, ":", &save);
- ctx->audio_filename = av_strtok(NULL, ":", &save);
- } else {
- ctx->audio_filename = av_strtok(tmp, ":", &save);
- }
- }
- static int add_video_device(AVFormatContext *s, AVCaptureDevice *video_device)
- {
- AVFContext *ctx = (AVFContext*)s->priv_data;
- NSError *error = nil;
- AVCaptureInput* capture_input = nil;
- 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;
- }
- // select pixel format
- struct AVFPixelFormatSpec pxl_fmt_spec;
- 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));
- }
- }
- ctx->pixel_format = pxl_fmt_spec.ff_id;
- NSNumber *pixel_format = [NSNumber numberWithUnsignedInt:pxl_fmt_spec.avf_id];
- NSDictionary *capture_dict = [NSDictionary dictionaryWithObject:pixel_format
- forKey:(id)kCVPixelBufferPixelFormatTypeKey];
- [ctx->video_output setVideoSettings:capture_dict];
- [ctx->video_output setAlwaysDiscardsLateVideoFrames:YES];
- ctx->avf_delegate = [[AVFFrameReceiver alloc] initWithContext:ctx];
- dispatch_queue_t 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];
- 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];
- dispatch_queue_t 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;
- // Take stream info from the first frame.
- while (ctx->frames_captured < 1) {
- CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, YES);
- }
- lock_frames(ctx);
- AVStream* stream = avformat_new_stream(s, NULL);
- if (!stream) {
- return 1;
- }
- ctx->video_stream_index = stream->index;
- avpriv_set_pts_info(stream, 64, 1, avf_time_base);
- CVImageBufferRef image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame);
- CGSize image_buffer_size = CVImageBufferGetEncodedSize(image_buffer);
- stream->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
- stream->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- stream->codec->width = (int)image_buffer_size.width;
- stream->codec->height = (int)image_buffer_size.height;
- stream->codec->pix_fmt = 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;
- // Take stream info from the first frame.
- while (ctx->audio_frames_captured < 1) {
- CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, YES);
- }
- lock_frames(ctx);
- AVStream* stream = avformat_new_stream(s, NULL);
- if (!stream) {
- return 1;
- }
- ctx->audio_stream_index = stream->index;
- avpriv_set_pts_info(stream, 64, 1, avf_time_base);
- CMFormatDescriptionRef 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->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- stream->codec->sample_rate = basic_desc->mSampleRate;
- stream->codec->channels = basic_desc->mChannelsPerFrame;
- stream->codec->channel_layout = av_get_default_channel_layout(stream->codec->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->codec->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->codec->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->codec->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->codec->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];
- AVFContext *ctx = (AVFContext*)s->priv_data;
- ctx->first_pts = av_gettime();
- ctx->first_audio_pts = av_gettime();
- uint32_t num_screens = 0;
- pthread_mutex_init(&ctx->frame_lock, NULL);
- pthread_cond_init(&ctx->frame_wait_cond, NULL);
- #if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
- CGGetActiveDisplayList(0, NULL, &num_screens);
- #endif
- // List devices if requested
- if (ctx->list_devices) {
- av_log(ctx, AV_LOG_INFO, "AVFoundation video devices:\n");
- NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
- int index = 0;
- 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 __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;
- }
- // Find capture device
- AVCaptureDevice *video_device = nil;
- AVCaptureDevice *audio_device = nil;
- NSArray *video_devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
- ctx->num_video_devices = [video_devices count];
- // 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 = [video_devices objectAtIndex:ctx->video_device_index];
- } else if (ctx->video_device_index < ctx->num_video_devices + num_screens) {
- #if __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];
- video_device = (AVCaptureDevice*) capture_screen_input;
- #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 video_devices) {
- if (!strncmp(ctx->video_filename, [[device localizedName] UTF8String], strlen(ctx->video_filename))) {
- video_device = device;
- break;
- }
- }
- #if __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;
- }
- }
- #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];
- 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 {
- lock_frames(ctx);
- CVImageBufferRef image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame);
- if (ctx->current_frame != nil) {
- if (av_new_packet(pkt, (int)CVPixelBufferGetDataSize(image_buffer)) < 0) {
- return AVERROR(EIO);
- }
- pkt->pts = pkt->dts = av_rescale_q(av_gettime() - ctx->first_pts,
- AV_TIME_BASE_Q,
- avf_time_base_q);
- pkt->stream_index = ctx->video_stream_index;
- pkt->flags |= AV_PKT_FLAG_KEY;
- CVPixelBufferLockBaseAddress(image_buffer, 0);
- void* 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);
- }
- pkt->pts = pkt->dts = av_rescale_q(av_gettime() - ctx->first_audio_pts,
- AV_TIME_BASE_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;
- OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, ctx->audio_buffer);
- if (ret != kCMBlockBufferNoErr) {
- return AVERROR(EIO);
- }
- int 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},
- { 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,
- };
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