348 lines
12 KiB
Plaintext
348 lines
12 KiB
Plaintext
/*
|
|
* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*
|
|
*/
|
|
|
|
#import "TGRTCVideoDecoderH265.h"
|
|
|
|
#import <VideoToolbox/VideoToolbox.h>
|
|
|
|
#import "base/RTCVideoFrame.h"
|
|
#import "base/RTCVideoFrameBuffer.h"
|
|
#import "components/video_frame_buffer/RTCCVPixelBuffer.h"
|
|
#import "helpers.h"
|
|
#import "helpers/scoped_cftyperef.h"
|
|
|
|
#if defined(WEBRTC_IOS)
|
|
#import "helpers/UIDevice+RTCDevice.h"
|
|
#endif
|
|
|
|
#include "modules/video_coding/include/video_error_codes.h"
|
|
#include "rtc_base/checks.h"
|
|
#include "rtc_base/logging.h"
|
|
#include "rtc_base/time_utils.h"
|
|
#include "sdk/objc/components/video_codec/nalu_rewriter.h"
|
|
|
|
#include "Manager.h"
|
|
|
|
typedef void (^TGRTCVideoDecoderRequestKeyframeCallback)();
|
|
|
|
// Struct that we pass to the decoder per frame to decode. We receive it again
|
|
// in the decoder callback.
|
|
struct RTCH265FrameDecodeParams {
|
|
RTCH265FrameDecodeParams(RTCVideoDecoderCallback cb, int64_t ts, TGRTCVideoDecoderRequestKeyframeCallback requestFrame)
|
|
: callback(cb), timestamp(ts), requestFrame(requestFrame) {}
|
|
RTCVideoDecoderCallback callback;
|
|
int64_t timestamp;
|
|
TGRTCVideoDecoderRequestKeyframeCallback requestFrame;
|
|
};
|
|
|
|
// This is the callback function that VideoToolbox calls when decode is
|
|
// complete.
|
|
static void tg_h265DecompressionOutputCallback(void* decoder,
|
|
void* params,
|
|
OSStatus status,
|
|
VTDecodeInfoFlags infoFlags,
|
|
CVImageBufferRef imageBuffer,
|
|
CMTime timestamp,
|
|
CMTime duration) {
|
|
std::unique_ptr<RTCH265FrameDecodeParams> decodeParams(
|
|
reinterpret_cast<RTCH265FrameDecodeParams*>(params));
|
|
if (status != noErr) {
|
|
RTC_LOG(LS_ERROR) << "Failed to decode frame. Status: " << status;
|
|
if (status == -12909) {
|
|
decodeParams->requestFrame();
|
|
}
|
|
return;
|
|
}
|
|
// TODO(tkchin): Handle CVO properly.
|
|
RTCCVPixelBuffer* frameBuffer =
|
|
[[RTCCVPixelBuffer alloc] initWithPixelBuffer:imageBuffer];
|
|
RTCVideoFrame* decodedFrame = [[RTCVideoFrame alloc]
|
|
initWithBuffer:frameBuffer
|
|
rotation:RTCVideoRotation_0
|
|
timeStampNs:CMTimeGetSeconds(timestamp) * rtc::kNumNanosecsPerSec];
|
|
decodedFrame.timeStamp = (int32_t)decodeParams->timestamp;
|
|
decodeParams->callback(decodedFrame);
|
|
}
|
|
|
|
@interface TGRTCVideoDecoderH265RequestKeyframeHolder : NSObject
|
|
|
|
@property (nonatomic, strong) NSLock *lock;
|
|
@property (nonatomic) bool shouldRequestKeyframe;
|
|
|
|
@end
|
|
|
|
@implementation TGRTCVideoDecoderH265RequestKeyframeHolder
|
|
|
|
- (instancetype)init {
|
|
self = [super init];
|
|
if (self != nil) {
|
|
_lock = [[NSLock alloc] init];
|
|
}
|
|
return self;
|
|
}
|
|
|
|
@end
|
|
|
|
// Decoder.
|
|
@implementation TGRTCVideoDecoderH265 {
|
|
CMVideoFormatDescriptionRef _videoFormat;
|
|
VTDecompressionSessionRef _decompressionSession;
|
|
RTCVideoDecoderCallback _callback;
|
|
TGRTCVideoDecoderH265RequestKeyframeHolder *_requestKeyframeHolder;
|
|
TGRTCVideoDecoderRequestKeyframeCallback _requestFrame;
|
|
OSStatus _error;
|
|
}
|
|
|
|
- (instancetype)init {
|
|
if (self = [super init]) {
|
|
_requestKeyframeHolder = [[TGRTCVideoDecoderH265RequestKeyframeHolder alloc] init];
|
|
TGRTCVideoDecoderH265RequestKeyframeHolder *requestKeyframeHolder = _requestKeyframeHolder;
|
|
_requestFrame = ^{
|
|
[requestKeyframeHolder.lock lock];
|
|
requestKeyframeHolder.shouldRequestKeyframe = true;
|
|
[requestKeyframeHolder.lock unlock];
|
|
};
|
|
NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
|
|
#ifdef WEBRTC_IOS
|
|
[center addObserver:self
|
|
selector:@selector(handleApplicationDidBecomeActive:)
|
|
name:UIApplicationWillEnterForegroundNotification
|
|
object:[UIApplication sharedApplication]];
|
|
#endif
|
|
}
|
|
|
|
return self;
|
|
}
|
|
|
|
- (void)dealloc {
|
|
[self destroyDecompressionSession];
|
|
[self setVideoFormat:nullptr];
|
|
[[NSNotificationCenter defaultCenter] removeObserver:self];
|
|
}
|
|
|
|
- (NSInteger)startDecodeWithNumberOfCores:(int)numberOfCores {
|
|
return WEBRTC_VIDEO_CODEC_OK;
|
|
}
|
|
|
|
- (void)handleApplicationDidBecomeActive:(NSNotification *)notification {
|
|
__weak TGRTCVideoDecoderH265 *weakSelf = self;
|
|
tgcalls::Manager::getMediaThread()->PostTask(RTC_FROM_HERE, [weakSelf]() {
|
|
__strong TGRTCVideoDecoderH265 *strongSelf = weakSelf;
|
|
if (strongSelf == nil) {
|
|
return;
|
|
}
|
|
strongSelf->_videoFormat = nil;
|
|
});
|
|
}
|
|
|
|
- (NSInteger)decode:(RTCEncodedImage*)inputImage
|
|
missingFrames:(BOOL)missingFrames
|
|
codecSpecificInfo:(__nullable id<RTCCodecSpecificInfo>)info
|
|
renderTimeMs:(int64_t)renderTimeMs {
|
|
RTC_DCHECK(inputImage.buffer);
|
|
|
|
if (_error != noErr) {
|
|
RTC_LOG(LS_WARNING) << "Last frame decode failed.";
|
|
_error = noErr;
|
|
return WEBRTC_VIDEO_CODEC_ERROR;
|
|
}
|
|
|
|
rtc::ScopedCFTypeRef<CMVideoFormatDescriptionRef> inputFormat =
|
|
rtc::ScopedCF(webrtc::CreateH265VideoFormatDescription(
|
|
(uint8_t*)inputImage.buffer.bytes, inputImage.buffer.length));
|
|
if (inputFormat) {
|
|
CMVideoDimensions dimensions =
|
|
CMVideoFormatDescriptionGetDimensions(inputFormat.get());
|
|
RTC_LOG(LS_INFO) << "Resolution: " << dimensions.width << " x "
|
|
<< dimensions.height;
|
|
// Check if the video format has changed, and reinitialize decoder if
|
|
// needed.
|
|
if (!CMFormatDescriptionEqual(inputFormat.get(), _videoFormat)) {
|
|
[self setVideoFormat:inputFormat.get()];
|
|
int resetDecompressionSessionError = [self resetDecompressionSession];
|
|
if (resetDecompressionSessionError != WEBRTC_VIDEO_CODEC_OK) {
|
|
return resetDecompressionSessionError;
|
|
}
|
|
}
|
|
}
|
|
if (!_videoFormat) {
|
|
// We received a frame but we don't have format information so we can't
|
|
// decode it.
|
|
// This can happen after backgrounding. We need to wait for the next
|
|
// sps/pps before we can resume so we request a keyframe by returning an
|
|
// error.
|
|
RTC_LOG(LS_WARNING) << "Missing video format. Frame with sps/pps required.";
|
|
return WEBRTC_VIDEO_CODEC_ERROR;
|
|
}
|
|
CMSampleBufferRef sampleBuffer = nullptr;
|
|
if (!webrtc::H265AnnexBBufferToCMSampleBuffer(
|
|
(uint8_t*)inputImage.buffer.bytes, inputImage.buffer.length,
|
|
_videoFormat, &sampleBuffer)) {
|
|
return WEBRTC_VIDEO_CODEC_ERROR;
|
|
}
|
|
RTC_DCHECK(sampleBuffer);
|
|
VTDecodeFrameFlags decodeFlags =
|
|
kVTDecodeFrame_EnableAsynchronousDecompression;
|
|
std::unique_ptr<RTCH265FrameDecodeParams> frameDecodeParams;
|
|
frameDecodeParams.reset(
|
|
new RTCH265FrameDecodeParams(_callback, inputImage.timeStamp, _requestFrame));
|
|
OSStatus status = VTDecompressionSessionDecodeFrame(
|
|
_decompressionSession, sampleBuffer, decodeFlags,
|
|
frameDecodeParams.release(), nullptr);
|
|
#if defined(WEBRTC_IOS)
|
|
// Re-initialize the decoder if we have an invalid session while the app is
|
|
// active and retry the decode request.
|
|
if (status == kVTInvalidSessionErr &&
|
|
[self resetDecompressionSession] == WEBRTC_VIDEO_CODEC_OK) {
|
|
frameDecodeParams.reset(
|
|
new RTCH265FrameDecodeParams(_callback, inputImage.timeStamp, _requestFrame));
|
|
status = VTDecompressionSessionDecodeFrame(
|
|
_decompressionSession, sampleBuffer, decodeFlags,
|
|
frameDecodeParams.release(), nullptr);
|
|
}
|
|
#endif
|
|
CFRelease(sampleBuffer);
|
|
if (status != noErr) {
|
|
RTC_LOG(LS_ERROR) << "Failed to decode frame with code: " << status;
|
|
return WEBRTC_VIDEO_CODEC_ERROR;
|
|
}
|
|
|
|
bool requestKeyframe = false;
|
|
|
|
[_requestKeyframeHolder.lock lock];
|
|
if (_requestKeyframeHolder.shouldRequestKeyframe) {
|
|
_requestKeyframeHolder.shouldRequestKeyframe = false;
|
|
requestKeyframe = true;
|
|
}
|
|
[_requestKeyframeHolder.lock unlock];
|
|
|
|
if (requestKeyframe) {
|
|
RTC_LOG(LS_ERROR) << "Decoder asynchronously asked to request keyframe";
|
|
return WEBRTC_VIDEO_CODEC_ERROR;
|
|
}
|
|
|
|
return WEBRTC_VIDEO_CODEC_OK;
|
|
}
|
|
|
|
- (void)setCallback:(RTCVideoDecoderCallback)callback {
|
|
_callback = callback;
|
|
}
|
|
|
|
- (NSInteger)releaseDecoder {
|
|
// Need to invalidate the session so that callbacks no longer occur and it
|
|
// is safe to null out the callback.
|
|
[self destroyDecompressionSession];
|
|
[self setVideoFormat:nullptr];
|
|
_callback = nullptr;
|
|
return WEBRTC_VIDEO_CODEC_OK;
|
|
}
|
|
|
|
#pragma mark - Private
|
|
|
|
- (int)resetDecompressionSession {
|
|
[self destroyDecompressionSession];
|
|
|
|
// Need to wait for the first SPS to initialize decoder.
|
|
if (!_videoFormat) {
|
|
return WEBRTC_VIDEO_CODEC_OK;
|
|
}
|
|
|
|
// Set keys for OpenGL and IOSurface compatibilty, which makes the encoder
|
|
// create pixel buffers with GPU backed memory. The intent here is to pass
|
|
// the pixel buffers directly so we avoid a texture upload later during
|
|
// rendering. This currently is moot because we are converting back to an
|
|
// I420 frame after decode, but eventually we will be able to plumb
|
|
// CVPixelBuffers directly to the renderer.
|
|
// TODO(tkchin): Maybe only set OpenGL/IOSurface keys if we know that that
|
|
// we can pass CVPixelBuffers as native handles in decoder output.
|
|
static size_t const attributesSize = 3;
|
|
CFTypeRef keys[attributesSize] = {
|
|
#if defined(WEBRTC_IOS)
|
|
kCVPixelBufferOpenGLESCompatibilityKey,
|
|
#elif defined(WEBRTC_MAC)
|
|
kCVPixelBufferOpenGLCompatibilityKey,
|
|
#endif
|
|
kCVPixelBufferIOSurfacePropertiesKey,
|
|
kCVPixelBufferPixelFormatTypeKey
|
|
};
|
|
CFDictionaryRef ioSurfaceValue = CreateCFTypeDictionary(nullptr, nullptr, 0);
|
|
int64_t nv12type = kCVPixelFormatType_420YpCbCr8BiPlanarFullRange;
|
|
CFNumberRef pixelFormat =
|
|
CFNumberCreate(nullptr, kCFNumberLongType, &nv12type);
|
|
CFTypeRef values[attributesSize] = {kCFBooleanTrue, ioSurfaceValue,
|
|
pixelFormat};
|
|
CFDictionaryRef attributes =
|
|
CreateCFTypeDictionary(keys, values, attributesSize);
|
|
if (ioSurfaceValue) {
|
|
CFRelease(ioSurfaceValue);
|
|
ioSurfaceValue = nullptr;
|
|
}
|
|
if (pixelFormat) {
|
|
CFRelease(pixelFormat);
|
|
pixelFormat = nullptr;
|
|
}
|
|
VTDecompressionOutputCallbackRecord record = {
|
|
tg_h265DecompressionOutputCallback,
|
|
nullptr,
|
|
};
|
|
OSStatus status =
|
|
VTDecompressionSessionCreate(nullptr, _videoFormat, nullptr, attributes,
|
|
&record, &_decompressionSession);
|
|
CFRelease(attributes);
|
|
if (status != noErr) {
|
|
[self destroyDecompressionSession];
|
|
return WEBRTC_VIDEO_CODEC_ERROR;
|
|
}
|
|
[self configureDecompressionSession];
|
|
|
|
return WEBRTC_VIDEO_CODEC_OK;
|
|
}
|
|
|
|
- (void)configureDecompressionSession {
|
|
RTC_DCHECK(_decompressionSession);
|
|
#if defined(WEBRTC_IOS)
|
|
// VTSessionSetProperty(_decompressionSession,
|
|
// kVTDecompressionPropertyKey_RealTime, kCFBooleanTrue);
|
|
#endif
|
|
}
|
|
|
|
- (void)destroyDecompressionSession {
|
|
if (_decompressionSession) {
|
|
#if defined(WEBRTC_IOS)
|
|
if ([UIDevice isIOS11OrLater]) {
|
|
VTDecompressionSessionWaitForAsynchronousFrames(_decompressionSession);
|
|
}
|
|
#endif
|
|
VTDecompressionSessionInvalidate(_decompressionSession);
|
|
CFRelease(_decompressionSession);
|
|
_decompressionSession = nullptr;
|
|
}
|
|
}
|
|
|
|
- (void)setVideoFormat:(CMVideoFormatDescriptionRef)videoFormat {
|
|
if (_videoFormat == videoFormat) {
|
|
return;
|
|
}
|
|
if (_videoFormat) {
|
|
CFRelease(_videoFormat);
|
|
}
|
|
_videoFormat = videoFormat;
|
|
if (_videoFormat) {
|
|
CFRetain(_videoFormat);
|
|
}
|
|
}
|
|
|
|
- (NSString*)implementationName {
|
|
return @"VideoToolbox";
|
|
}
|
|
|
|
@end
|