diff options
Diffstat (limited to 'libavdevice/avfoundation.m')
| -rw-r--r-- | libavdevice/avfoundation.m | 1049 |
1 files changed, 1049 insertions, 0 deletions
diff --git a/libavdevice/avfoundation.m b/libavdevice/avfoundation.m new file mode 100644 index 0000000000..763e675766 --- /dev/null +++ b/libavdevice/avfoundation.m @@ -0,0 +1,1049 @@ +/* + * 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/parseutils.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 !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; + 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; + + AVRational framerate; + int width, height; + + int capture_cursor; + int capture_mouse_clicks; + + 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); + } +} + +/** + * 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; + + 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); + goto unsupported_format; + } + + if ([video_device lockForConfiguration:NULL] == YES) { + NSValue *min_frame_duration = [selected_range valueForKey:@"minFrameDuration"]; + + [video_device setValue:selected_format forKey:@"activeFormat"]; + [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"); + return AVERROR(EINVAL); + } + + 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)); + } + } + + 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:YES]; + + 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; + 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->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; + 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->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]; + 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, 0, 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, +}; |