項目內導入libyuv與FFMpge
#import <Foundation/Foundation.h>
#import "libyuv.h"
#import "avformat.h"
NS_ASSUME_NONNULL_BEGIN
@interface CPCameraVideoFrame : NSObject
@property (nonatomic, assign)uint8 *desFrame; // I420
@property (nonatomic, assign)int dataSize;
@property (nonatomic, assign)int width;
@property (nonatomic, assign)int height;
- (instancetype)initWithAVFrame:(AVFrame *)avframe;
- (uint8 *)avframeToI420:(AVFrame *)avframe;
@end
#import "CPCameraVideoFrame.h"
@implementation CPCameraVideoFrame
- (instancetype)initWithAVFrame:(AVFrame *)avframe {
if (self = [super init]) {
_width = avframe->width;
_height = avframe->height;
_dataSize = avframe->width * avframe->height * 3 / 2;
_desFrame = [self avframeToI420:avframe];
}
return self;
}
- (uint8 *)avframeToI420:(AVFrame *)avframe {
int width = avframe->width;
int height = avframe->height;
int dataSize = (width * height) * 3 / 2;
int uoffset = width * height;
int voffset = uoffset + (uoffset >> 2); // uoffset / 4
uint8 *desbuffer = (uint8 *)malloc(dataSize);
I420Copy(avframe->data[0],
avframe->linesize[0],
avframe->data[1], avframe->linesize[1],
avframe->data[2], avframe->linesize[2],
desbuffer, width,
desbuffer + uoffset, width >> 1,
desbuffer + voffset, width >> 1,
width, height);
return desbuffer;
}
@end
