RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
ffmpeg/libavdevice/avfoundation.m

466 lines
16 KiB
Objective-C
Raw Blame History

/*
* 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 "libavformat/internal.h"
#include "libavutil/internal.h"
#include "libavutil/time.h"
#include "avdevice.h"
static const int avf_time_base = 100;
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;
float frame_rate;
int frames_captured;
int64_t first_pts;
pthread_mutex_t frame_lock;
pthread_cond_t frame_wait_cond;
id avf_delegate;
int list_devices;
int video_device_index;
enum AVPixelFormat pixel_format;
AVCaptureSession *capture_session;
AVCaptureVideoDataOutput *video_output;
CMSampleBufferRef current_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
static void destroy_context(AVFContext* ctx)
{
[ctx->capture_session stopRunning];
[ctx->capture_session release];
[ctx->video_output release];
[ctx->avf_delegate release];
ctx->capture_session = NULL;
ctx->video_output = NULL;
ctx->avf_delegate = NULL;
pthread_mutex_destroy(&ctx->frame_lock);
pthread_cond_destroy(&ctx->frame_wait_cond);
if (ctx->current_frame) {
CFRelease(ctx->current_frame);
}
}
static int avf_read_header(AVFormatContext *s)
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
AVFContext *ctx = (AVFContext*)s->priv_data;
ctx->first_pts = av_gettime();
pthread_mutex_init(&ctx->frame_lock, NULL);
pthread_cond_init(&ctx->frame_wait_cond, NULL);
// List devices if requested
if (ctx->list_devices) {
av_log(ctx, AV_LOG_INFO, "AVFoundation video devices:\n");
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
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;
// check for device index given in filename
if (ctx->video_device_index == -1) {
sscanf(s->filename, "%d", &ctx->video_device_index);
}
if (ctx->video_device_index >= 0) {
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
if (ctx->video_device_index >= [devices count]) {
av_log(ctx, AV_LOG_ERROR, "Invalid device index\n");
goto fail;
}
video_device = [devices objectAtIndex:ctx->video_device_index];
} else if (strncmp(s->filename, "", 1) &&
strncmp(s->filename, "default", 7)) {
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in devices) {
if (!strncmp(s->filename, [[device localizedName] UTF8String], strlen(s->filename))) {
video_device = device;
break;
}
}
if (!video_device) {
av_log(ctx, AV_LOG_ERROR, "Video device not found\n");
goto fail;
}
} else {
video_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeMuxed];
}
// Video capture device not found, looking for AVMediaTypeVideo
if (!video_device) {
video_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if (!video_device) {
av_log(s, AV_LOG_ERROR, "No AV capture device found\n");
goto fail;
}
}
NSString* dev_display_name = [video_device localizedName];
av_log(s, AV_LOG_DEBUG, "'%s' opened\n", [dev_display_name UTF8String]);
// Initialize capture session
ctx->capture_session = [[AVCaptureSession alloc] init];
NSError *error = nil;
AVCaptureDeviceInput* capture_dev_input = [[[AVCaptureDeviceInput alloc] initWithDevice:video_device error:&error] autorelease];
if (!capture_dev_input) {
av_log(s, AV_LOG_ERROR, "Failed to create AV capture input device: %s\n",
[[error localizedDescription] UTF8String]);
goto fail;
}
if (!capture_dev_input) {
av_log(s, AV_LOG_ERROR, "Failed to add AV capture input device to session: %s\n",
[[error localizedDescription] UTF8String]);
goto fail;
}
if ([ctx->capture_session canAddInput:capture_dev_input]) {
[ctx->capture_session addInput:capture_dev_input];
} else {
av_log(s, AV_LOG_ERROR, "can't add video input to capture session\n");
goto fail;
}
// 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");
goto fail;
}
// 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));
goto fail;
}
// 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) {
goto fail;
} 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));
}
}
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");
goto fail;
}
[ctx->capture_session startRunning];
// 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) {
goto fail;
}
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 = pxl_fmt_spec.ff_id;
CFRelease(ctx->current_frame);
ctx->current_frame = nil;
unlock_frames(ctx);
[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 = 0;
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 {
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[] = {
{ "frame_rate", "set frame rate", offsetof(AVFContext, frame_rate), AV_OPT_TYPE_FLOAT, { .dbl = 30.0 }, 0.1, 30.0, AV_OPT_TYPE_VIDEO_RATE, NULL },
{ "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 },
{ "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,
};
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,
};
Reference in New Issue View Git Blame Copy Permalink