Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

avfoundation: Simple capture

Browse Source 
Originally based on the capture written by
Thilo Borgmann <thilo.borgmann@mail.de>.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
pull/164/head
Alexandre Lision 9 years ago committed by Luca Barbato
parent 9f57f134c1
commit 4f979418c7
6 changed files with 697 additions and 1 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 1
      Changelog
  2. 7
      configure
  3. 1
      libavdevice/Makefile
  4. 1
      libavdevice/alldevices.c
  5. 686
      libavdevice/avfoundation_dec.m
  6. 2
      libavdevice/version.h

1
Changelog
Unescape View File

@ -48,6 +48,7 @@ version <next>:
- libkvazaar HEVC encoder
- innoHeim/Rsupport Screen Capture Codec decoder
- support encoding 16-bit RLE SGI images
- support Apple AVFoundation video capture
version 11:

7
configure vendored
Unescape View File

@ -1453,6 +1453,7 @@ HAVE_LIST_PUB="
"
HEADERS_LIST="
AVFoundation_AVFoundation_h
alsa_asoundlib_h
altivec_h
arpa_inet_h
@ -2264,6 +2265,7 @@ xwma_demuxer_select="riffdec"
# indevs / outdevs
alsa_indev_deps="alsa_asoundlib_h snd_pcm_htimestamp"
alsa_outdev_deps="alsa_asoundlib_h"
avfoundation_indev_deps="AVFoundation_AVFoundation_h"
bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
dv1394_indev_deps="dv1394"
dv1394_indev_select="dv_demuxer"
@ -4560,6 +4562,11 @@ check_header linux/fb.h
check_header linux/videodev2.h
check_struct linux/videodev2.h "struct v4l2_frmivalenum" discrete
check_header AVFoundation/AVFoundation.h &&
check_objcflags -fobjc-arc &&
add_extralibs -framework Foundation -framework AVFoundation -framework CoreMedia || \
disable AVFoundation_AVFoundation_h
check_header sys/videoio.h
check_func_headers "windows.h vfw.h" capCreateCaptureWindow "$vfwcap_indev_extralibs"

1
libavdevice/Makefile
Unescape View File

@ -9,6 +9,7 @@ OBJS = alldevices.o \
# input/output devices
OBJS-$(CONFIG_ALSA_INDEV) += alsa_dec.o alsa.o
OBJS-$(CONFIG_ALSA_OUTDEV) += alsa_enc.o alsa.o
OBJS-$(CONFIG_AVFOUNDATION_INDEV) += avfoundation_dec.o
OBJS-$(CONFIG_BKTR_INDEV) += bktr.o
OBJS-$(CONFIG_DV1394_INDEV) += dv1394.o
OBJS-$(CONFIG_FBDEV_INDEV) += fbdev.o

1
libavdevice/alldevices.c
Unescape View File

@ -48,6 +48,7 @@ void avdevice_register_all(void)
/* devices */
REGISTER_INOUTDEV(ALSA, alsa);
REGISTER_INDEV (AVFOUNDATION, avfoundation);
REGISTER_INDEV (BKTR, bktr);
REGISTER_INDEV (DV1394, dv1394);
REGISTER_INDEV (FBDEV, fbdev);

686
libavdevice/avfoundation_dec.m
Unescape View File

@ -0,0 +1,686 @@
/*
* AVFoundation input device
* Copyright (c) 2015 Luca Barbato
* Alexandre Lision
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#import <AVFoundation/AVFoundation.h>
#include <pthread.h>
#include "libavformat/avformat.h"
#include "libavformat/internal.h"
#include "libavutil/log.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/time.h"
#include "avdevice.h"
struct AVPixelFormatMap {
enum AVPixelFormat pix_fmt;
OSType core_video_fmt;
};
static const struct AVPixelFormatMap pixel_format_map[] = {
{ AV_PIX_FMT_ABGR, kCVPixelFormatType_32ABGR },
{ AV_PIX_FMT_ARGB, kCVPixelFormatType_32ARGB },
{ AV_PIX_FMT_BGR24, kCVPixelFormatType_24BGR },
{ AV_PIX_FMT_BGR48BE, kCVPixelFormatType_48RGB },
{ AV_PIX_FMT_BGRA, kCVPixelFormatType_32BGRA },
{ AV_PIX_FMT_MONOBLACK, kCVPixelFormatType_1Monochrome },
{ AV_PIX_FMT_NV12, kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange },
{ AV_PIX_FMT_RGB24, kCVPixelFormatType_24RGB },
{ 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_RGBA, kCVPixelFormatType_32RGBA },
{ AV_PIX_FMT_UYVY422, kCVPixelFormatType_422YpCbCr8 },
{ AV_PIX_FMT_YUV420P, kCVPixelFormatType_420YpCbCr8Planar },
{ AV_PIX_FMT_YUV422P10, kCVPixelFormatType_422YpCbCr10 },
{ AV_PIX_FMT_YUV422P16, kCVPixelFormatType_422YpCbCr16 },
{ AV_PIX_FMT_YUV444P, kCVPixelFormatType_444YpCbCr8 },
{ AV_PIX_FMT_YUV444P10, kCVPixelFormatType_444YpCbCr10 },
{ AV_PIX_FMT_YUVA444P, kCVPixelFormatType_4444YpCbCrA8R },
{ AV_PIX_FMT_YUVA444P16LE, kCVPixelFormatType_4444AYpCbCr16 },
{ 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 }
};
static enum AVPixelFormat core_video_to_pix_fmt(OSType core_video_fmt)
{
int i;
for (i = 0; pixel_format_map[i].pix_fmt != AV_PIX_FMT_NONE; i++)
if (core_video_fmt == pixel_format_map[i].core_video_fmt)
return pixel_format_map[i].pix_fmt;
return AV_PIX_FMT_NONE;
}
static OSType pix_fmt_to_core_video(enum AVPixelFormat pix_fmt)
{
int i;
for (i = 0; pixel_format_map[i].pix_fmt != AV_PIX_FMT_NONE; i++)
if (pix_fmt == pixel_format_map[i].pix_fmt)
return pixel_format_map[i].core_video_fmt;
return 0;
}
typedef struct AVFoundationCaptureContext {
AVClass *class;
/* AVOptions */
int list_devices;
int list_formats;
char *pixel_format;
char *video_size; /* String describing video size */
char *framerate; /* String describing the framerate */
int video_stream_index;
int width, height;
AVRational internal_framerate;
int64_t first_pts;
int frames_captured;
pthread_mutex_t frame_lock;
pthread_cond_t frame_wait_cond;
/* ARC-compatible pointers to ObjC objects */
CFTypeRef session; /* AVCaptureSession */
CFTypeRef video_output;
CFTypeRef video_delegate;
CVImageBufferRef current_frame;
} AVFoundationCaptureContext;
#define AUDIO_DEVICES 1
#define VIDEO_DEVICES 2
#define ALL_DEVICES AUDIO_DEVICES | VIDEO_DEVICES
#define OFFSET(x) offsetof(AVFoundationCaptureContext, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{ "list_devices", "List available devices and exit", OFFSET(list_devices), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, DEC, "list_devices" },
{ "all", "Show all the supported devices", OFFSET(list_devices), AV_OPT_TYPE_CONST, { .i64 = ALL_DEVICES }, 0, INT_MAX, DEC, "list_devices" },
{ "audio", "Show only the audio devices", OFFSET(list_devices), AV_OPT_TYPE_CONST, { .i64 = AUDIO_DEVICES }, 0, INT_MAX, DEC, "list_devices" },
{ "video", "Show only the video devices", OFFSET(list_devices), AV_OPT_TYPE_CONST, { .i64 = VIDEO_DEVICES }, 0, INT_MAX, DEC, "list_devices" },
{ "list_formats", "List available formats and exit", OFFSET(list_formats), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, DEC, "list_formats" },
{ "pixel_format", "Preferred pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, DEC },
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, DEC },
{ "framerate", "A string representing desired framerate", OFFSET(framerate), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, DEC },
{ NULL },
};
static void list_capture_devices_by_type(AVFormatContext *s, NSString *type)
{
NSArray *devices = [AVCaptureDevice devicesWithMediaType:type];
av_log(s, AV_LOG_INFO, "Type: %s\n", [type UTF8String]);
for (AVCaptureDevice *device in devices) {
av_log(s, AV_LOG_INFO, "uniqueID: %s\nname: %s\nformat:\n",
[[device uniqueID] UTF8String],
[[device localizedName] UTF8String]);
for (AVCaptureDeviceFormat *format in device.formats)
av_log(s, AV_LOG_INFO, "\t%s\n",
[[NSString stringWithFormat: @ "%@", format] UTF8String]);
}
}
static int avfoundation_list_capture_devices(AVFormatContext *s)
{
AVFoundationCaptureContext *ctx = s->priv_data;
if (ctx->list_devices & AUDIO_DEVICES)
list_capture_devices_by_type(s, AVMediaTypeAudio);
if (ctx->list_devices & VIDEO_DEVICES)
list_capture_devices_by_type(s, AVMediaTypeVideo);
return AVERROR_EXIT;
}
static int list_formats(AVFormatContext *s)
{
av_log(s, AV_LOG_VERBOSE, "Supported pixel formats (first is more efficient):\n");
AVCaptureVideoDataOutput *out = [[AVCaptureVideoDataOutput alloc] init];
for (NSNumber *cv_pixel_format in[out availableVideoCVPixelFormatTypes]) {
OSType cv_fmt = [cv_pixel_format intValue];
enum AVPixelFormat pix_fmt = core_video_to_pix_fmt(cv_fmt);
if (pix_fmt != AV_PIX_FMT_NONE) {
av_log(s, AV_LOG_VERBOSE, " %s: %d\n",
av_get_pix_fmt_name(pix_fmt),
cv_fmt);
}
}
return AVERROR_EXIT;
}
static void lock_frames(AVFoundationCaptureContext *ctx)
{
pthread_mutex_lock(&ctx->frame_lock);
}
static void unlock_frames(AVFoundationCaptureContext *ctx)
{
pthread_mutex_unlock(&ctx->frame_lock);
}
@interface VideoCapture : NSObject <AVCaptureVideoDataOutputSampleBufferDelegate>
{
AVFoundationCaptureContext *_context;
}
- (id)initWithContext:(AVFoundationCaptureContext *)context;
- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)videoFrame
fromConnection:(AVCaptureConnection *)connection;
@end
@implementation VideoCapture
- (id)initWithContext:(AVFoundationCaptureContext *)context
{
if (self = [super init]) {
_context = context;
}
return self;
}
- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)videoFrame
fromConnection:(AVCaptureConnection *)connection
{
CVImageBufferRef buf;
lock_frames(_context);
if (_context->current_frame != nil) {
CFRelease(_context->current_frame);
}
buf = CMSampleBufferGetImageBuffer(videoFrame);
if (!buf)
return;
CFRetain(buf);
_context->current_frame = buf;
pthread_cond_signal(&_context->frame_wait_cond);
unlock_frames(_context);
++_context->frames_captured;
}
@end
/**
* Configure the video device.
*/
static bool configure_video_device(AVFormatContext *s, AVCaptureDevice *video_device)
{
AVFoundationCaptureContext *ctx = s->priv_data;
AVCaptureDeviceFormat *selected_format = nil;
AVFrameRateRange *selected_range = nil;
double framerate = av_q2d(ctx->internal_framerate);
double epsilon = 0.00000001;
for (AVCaptureDeviceFormat *format in[video_device formats]) {
CMFormatDescriptionRef formatDescription;
CMVideoDimensions dimensions;
formatDescription = (CMFormatDescriptionRef)format.formatDescription;
dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
if ((ctx->width == 0 && ctx->height == 0) ||
(dimensions.width == ctx->width && dimensions.height == ctx->height)) {
av_log(s, AV_LOG_VERBOSE, "Trying video size %dx%d\n",
dimensions.width, dimensions.height);
ctx->width = dimensions.width;
ctx->height = dimensions.height;
selected_format = format;
if (framerate) {
av_log(s, AV_LOG_VERBOSE, "Checking support for framerate %f\n",
framerate);
for (AVFrameRateRange *range in format.videoSupportedFrameRateRanges)
if (range.minFrameRate <= (framerate + epsilon) &&
range.maxFrameRate >= (framerate - epsilon)) {
selected_range = range;
break;
}
} else {
selected_range = format.videoSupportedFrameRateRanges[0];
framerate = selected_range.maxFrameRate;
break;
}
if (selected_format && selected_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);
return false;
} else {
av_log(s, AV_LOG_VERBOSE, "Setting video size to %dx%d\n",
ctx->width, ctx->height);
}
if (framerate && !selected_range) {
av_log(s, AV_LOG_ERROR, "Selected framerate (%f) is not supported by the device\n",
framerate);
return false;
} else {
av_log(s, AV_LOG_VERBOSE, "Setting framerate to %f\n",
framerate);
}
if ([video_device lockForConfiguration : NULL] == YES) {
[video_device setActiveFormat : selected_format];
[video_device setActiveVideoMinFrameDuration : CMTimeMake(1, framerate)];
[video_device setActiveVideoMaxFrameDuration : CMTimeMake(1, framerate)];
} else {
av_log(s, AV_LOG_ERROR, "Could not lock device for configuration\n");
return false;
}
return true;
}
static void print_supported_formats(AVFormatContext *s, AVCaptureDevice *device)
{
av_log(s, AV_LOG_WARNING, "Supported modes:\n");
for (AVCaptureDeviceFormat *format in[device formats]) {
CMFormatDescriptionRef formatDescription;
CMVideoDimensions dimensions;
formatDescription = (CMFormatDescriptionRef)format.formatDescription;
dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
for (AVFrameRateRange *range in format.videoSupportedFrameRateRanges)
av_log(s, AV_LOG_WARNING, " %dx%d@[%f %f]fps\n",
dimensions.width, dimensions.height,
range.minFrameRate, range.maxFrameRate);
}
}
static int setup_stream(AVFormatContext *s, AVCaptureDevice *device)
{
AVFoundationCaptureContext *ctx = s->priv_data;
NSError *__autoreleasing error = nil;
AVCaptureDeviceInput *input;
AVCaptureSession *session = (__bridge AVCaptureSession *)ctx->session;
av_log(s, AV_LOG_VERBOSE, "Setting up stream for device %s\n", [[device uniqueID] UTF8String]);
if (!configure_video_device(s, device)) {
av_log(s, AV_LOG_ERROR, "device configuration failed\n");
print_supported_formats(s, device);
return AVERROR(EINVAL);
}
// add the input devices
input = [AVCaptureDeviceInput deviceInputWithDevice:device
error:&error];
if (!input) {
av_log(s, AV_LOG_ERROR, "%s\n",
[[error localizedDescription] UTF8String]);
return AVERROR_UNKNOWN;
}
if ([session canAddInput : input]) {
[session addInput : input];
} else {
av_log(s, AV_LOG_ERROR, "Cannot add video input to capture session\n");
return AVERROR(EINVAL);
}
// add the output devices
if ([device hasMediaType : AVMediaTypeVideo]) {
AVCaptureVideoDataOutput *out = [[AVCaptureVideoDataOutput alloc] init];
NSNumber *core_video_fmt = nil;
if (!out) {
av_log(s, AV_LOG_ERROR, "Failed to init AV video output\n");
return AVERROR(EINVAL);
}
[out setAlwaysDiscardsLateVideoFrames : YES];
if (ctx->pixel_format) {
// Try to use specified pixel format
core_video_fmt = [NSNumber numberWithInt:pix_fmt_to_core_video(av_get_pix_fmt(ctx->pixel_format))];
if ([[out availableVideoCVPixelFormatTypes] indexOfObject : core_video_fmt] != NSNotFound) {
av_log(s, AV_LOG_VERBOSE, "Pixel format %s supported!\n", ctx->pixel_format);
} else {
core_video_fmt = nil;
}
}
if (!ctx->pixel_format || !core_video_fmt) {
av_log(s, AV_LOG_VERBOSE, "Pixel format not supported or not provided, overriding...\n");
for (NSNumber *cv_pixel_format in[out availableVideoCVPixelFormatTypes]) {
OSType cv_fmt = [cv_pixel_format intValue];
enum AVPixelFormat pix_fmt = core_video_to_pix_fmt(cv_fmt);
// Use the first one in the list, it will be the most effective
if (pix_fmt != AV_PIX_FMT_NONE) {
core_video_fmt = cv_pixel_format;
ctx->pixel_format = av_strdup(av_get_pix_fmt_name(pix_fmt));
break;
}
}
}
// fail if there is no appropriate pixel format
if (!core_video_fmt) {
return AVERROR(EINVAL);
} else {
av_log(s, AV_LOG_VERBOSE, "Using %s.\n",
ctx->pixel_format);
}
NSDictionary *capture_dict = [NSDictionary dictionaryWithObject:core_video_fmt
forKey:(const NSString *)kCVPixelBufferPixelFormatTypeKey];
[out setVideoSettings : capture_dict];
VideoCapture *delegate = [[VideoCapture alloc] initWithContext:ctx];
dispatch_queue_t queue = dispatch_queue_create("avf_queue", NULL);
[out setSampleBufferDelegate : delegate queue : queue];
if ([session canAddOutput : out]) {
[session addOutput : out];
ctx->video_output = (__bridge_retained CFTypeRef)out;
ctx->video_delegate = (__bridge_retained CFTypeRef)delegate;
} else {
av_log(s, AV_LOG_ERROR, "can't add video output to capture session\n");
return AVERROR(EINVAL);
}
}
return 0;
}
static int get_video_config(AVFormatContext *s)
{
AVFoundationCaptureContext *ctx = (AVFoundationCaptureContext *)s->priv_data;
CVImageBufferRef image_buffer;
CGSize image_buffer_size;
AVStream *stream = avformat_new_stream(s, NULL);
if (!stream) {
av_log(s, AV_LOG_ERROR, "Failed to create AVStream\n");
return AVERROR(EINVAL);
}
// 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, 1000000);
image_buffer = 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 = av_get_pix_fmt(ctx->pixel_format);
CFRelease(ctx->current_frame);
ctx->current_frame = nil;
unlock_frames(ctx);
return 0;
}
static void destroy_context(AVFoundationCaptureContext *ctx)
{
AVCaptureSession *session = (__bridge AVCaptureSession *)ctx->session;
[session stopRunning];
ctx->session = NULL;
pthread_mutex_destroy(&ctx->frame_lock);
pthread_cond_destroy(&ctx->frame_wait_cond);
if (ctx->current_frame) {
CFRelease(ctx->current_frame);
}
}
static int setup_default_stream(AVFormatContext *s)
{
AVCaptureDevice *device;
for (NSString *type in @[AVMediaTypeVideo]) {
device = [AVCaptureDevice defaultDeviceWithMediaType:type];
if (device) {
av_log(s, AV_LOG_VERBOSE, "Using default device %s\n",
[[device uniqueID] UTF8String]);
return setup_stream(s, device);
}
}
return AVERROR(EINVAL);
}
/**
* Try to open device given in filename
* Two supported formats: "device_unique_id" or "[device_unique_id]"
*/
static AVCaptureDevice *create_device(AVFormatContext *s)
{
NSString *filename;
NSError *__autoreleasing error = nil;
NSRegularExpression *exp;
NSArray *matches;
AVCaptureDevice *device;
filename = [NSString stringWithFormat:@ "%s", s->filename];
if ((device = [AVCaptureDevice deviceWithUniqueID:filename])) {
av_log(s, AV_LOG_VERBOSE, "Device with name %s found\n", [filename UTF8String]);
return device;
}
// Remove '[]' from the device name
NSString *pat = @"(?<=\\[).*?(?=\\])";
exp = [NSRegularExpression regularExpressionWithPattern:pat
options:0
error:&error];
if (!exp) {
av_log(s, AV_LOG_ERROR, "%s\n",
[[error localizedDescription] UTF8String]);
return NULL;
}
matches = [exp matchesInString:filename options:0
range:NSMakeRange(0, [filename length])];
if (matches.count > 0) {
for (NSTextCheckingResult *match in matches) {
NSRange range = [match rangeAtIndex:0];
NSString *uniqueID = [filename substringWithRange:NSMakeRange(range.location, range.length)];
av_log(s, AV_LOG_VERBOSE, "opening device with ID: %s\n", [uniqueID UTF8String]);
if (!(device = [AVCaptureDevice deviceWithUniqueID:uniqueID])) {
av_log(s, AV_LOG_ERROR, "Device with name %s not found", [filename UTF8String]);
return NULL;
}
return device;
}
}
return NULL;
}
static int setup_streams(AVFormatContext *s)
{
AVFoundationCaptureContext *ctx = s->priv_data;
int ret;
AVCaptureDevice *device;
pthread_mutex_init(&ctx->frame_lock, NULL);
pthread_cond_init(&ctx->frame_wait_cond, NULL);
ctx->session = (__bridge_retained CFTypeRef)[[AVCaptureSession alloc] init];
if (!strncmp(s->filename, "default", 7)) {
ret = setup_default_stream(s);
} else {
device = create_device(s);
if (device) {
ret = setup_stream(s, device);
} else {
av_log(s, AV_LOG_ERROR, "No matches for %s\n", s->filename);
ret = setup_default_stream(s);
}
}
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "No device could be added\n");
return ret;
}
av_log(s, AV_LOG_VERBOSE, "Starting session!\n");
[(__bridge AVCaptureSession *)ctx->session startRunning];
// Session is started, unlock device
[device unlockForConfiguration];
av_log(s, AV_LOG_VERBOSE, "Checking video config\n");
if (get_video_config(s)) {
destroy_context(ctx);
return AVERROR(EIO);
}
return 0;
}
static int avfoundation_read_header(AVFormatContext *s)
{
AVFoundationCaptureContext *ctx = s->priv_data;
ctx->first_pts = av_gettime();
AVRational framerate_q = { 0, 1 };
ctx->internal_framerate = framerate_q;
if (ctx->list_devices)
return avfoundation_list_capture_devices(s);
if (ctx->list_formats) {
return list_formats(s);
}
if (ctx->pixel_format) {
if (av_get_pix_fmt(ctx->pixel_format) == AV_PIX_FMT_NONE) {
av_log(s, AV_LOG_ERROR, "No such input format: %s.\n",
ctx->pixel_format);
return AVERROR(EINVAL);
}
}
if (ctx->video_size &&
(av_parse_video_size(&ctx->width, &ctx->height, ctx->video_size)) < 0) {
av_log(s, AV_LOG_ERROR, "Could not parse video size '%s'.\n",
ctx->video_size);
return AVERROR(EINVAL);
}
if (ctx->framerate &&
(av_parse_video_rate(&ctx->internal_framerate, ctx->framerate)) < 0) {
av_log(s, AV_LOG_ERROR, "Could not parse framerate '%s'.\n",
ctx->framerate);
return AVERROR(EINVAL);
}
return setup_streams(s);
}
static int avfoundation_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVFoundationCaptureContext *ctx = (AVFoundationCaptureContext *)s->priv_data;
do {
lock_frames(ctx);
if (ctx->current_frame != nil) {
if (av_new_packet(pkt, (int)CVPixelBufferGetDataSize(ctx->current_frame)) < 0) {
return AVERROR(EIO);
}
pkt->pts = pkt->dts = av_rescale_q(av_gettime() - ctx->first_pts,
AV_TIME_BASE_Q,
(AVRational) {1, 1000000 });
pkt->stream_index = ctx->video_stream_index;
pkt->flags |= AV_PKT_FLAG_KEY;
CVPixelBufferLockBaseAddress(ctx->current_frame, 0);
void *data = CVPixelBufferGetBaseAddress(ctx->current_frame);
memcpy(pkt->data, data, pkt->size);
CVPixelBufferUnlockBaseAddress(ctx->current_frame, 0);
CFRelease(ctx->current_frame);
ctx->current_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 avfoundation_read_close(AVFormatContext *s)
{
av_log(s, AV_LOG_VERBOSE, "Closing session...\n");
AVFoundationCaptureContext *ctx = s->priv_data;
destroy_context(ctx);
return 0;
}
static const AVClass avfoundation_class = {
.class_name = "AVFoundation AVCaptureDevice indev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVInputFormat ff_avfoundation_demuxer = {
.name = "avfoundation",
.long_name = NULL_IF_CONFIG_SMALL("AVFoundation AVCaptureDevice grab"),
.priv_data_size = sizeof(AVFoundationCaptureContext),
.read_header = avfoundation_read_header,
.read_packet = avfoundation_read_packet,
.read_close = avfoundation_read_close,
.flags = AVFMT_NOFILE,
.priv_class = &avfoundation_class,
};

2
libavdevice/version.h
Unescape View File

@ -28,7 +28,7 @@
#include "libavutil/version.h"
#define LIBAVDEVICE_VERSION_MAJOR 56
#define LIBAVDEVICE_VERSION_MINOR 0
#define LIBAVDEVICE_VERSION_MINOR 1
#define LIBAVDEVICE_VERSION_MICRO 0
#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \

Write Preview
Loading…
Cancel
Save