615 lines
22 KiB
Plaintext
615 lines
22 KiB
Plaintext
/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*
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*/
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#import "TGRTCVideoEncoderH265.h"
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#import <VideoToolbox/VideoToolbox.h>
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#include <vector>
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#import "RTCCodecSpecificInfoH265.h"
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#import "api/peerconnection/RTCRtpFragmentationHeader+Private.h"
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#import "api/peerconnection/RTCVideoCodecInfo+Private.h"
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#import "base/RTCI420Buffer.h"
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#import "base/RTCVideoFrame.h"
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#import "base/RTCVideoFrameBuffer.h"
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#import "components/video_frame_buffer/RTCCVPixelBuffer.h"
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#import "helpers.h"
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#if defined(WEBRTC_IOS)
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#import "helpers/UIDevice+RTCDevice.h"
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#endif
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#include "common_video/h264/profile_level_id.h"
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#include "common_video/h265/h265_bitstream_parser.h"
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#include "common_video/include/bitrate_adjuster.h"
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#include "libyuv/convert_from.h"
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#include "modules/include/module_common_types.h"
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#include "modules/video_coding/include/video_error_codes.h"
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#include "rtc_base/buffer.h"
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#include "rtc_base/logging.h"
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#include "rtc_base/time_utils.h"
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#include "sdk/objc/Framework/Classes/VideoToolbox/nalu_rewriter.h"
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#include "system_wrappers/include/clock.h"
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@interface TGRTCVideoEncoderH265 ()
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- (void)frameWasEncoded:(OSStatus)status
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flags:(VTEncodeInfoFlags)infoFlags
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sampleBuffer:(CMSampleBufferRef)sampleBuffer
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width:(int32_t)width
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height:(int32_t)height
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renderTimeMs:(int64_t)renderTimeMs
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timestamp:(uint32_t)timestamp
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rotation:(RTCVideoRotation)rotation;
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@end
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namespace { // anonymous namespace
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// The ratio between kVTCompressionPropertyKey_DataRateLimits and
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// kVTCompressionPropertyKey_AverageBitRate. The data rate limit is set higher
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// than the average bit rate to avoid undershooting the target.
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const float kLimitToAverageBitRateFactor = 1.5f;
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// These thresholds deviate from the default h265 QP thresholds, as they
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// have been found to work better on devices that support VideoToolbox
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const int kLowh265QpThreshold = 28;
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const int kHighh265QpThreshold = 39;
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// Struct that we pass to the encoder per frame to encode. We receive it again
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// in the encoder callback.
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struct API_AVAILABLE(ios(11.0)) RTCFrameEncodeParams {
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RTCFrameEncodeParams(TGRTCVideoEncoderH265* e,
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int32_t w,
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int32_t h,
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int64_t rtms,
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uint32_t ts,
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RTCVideoRotation r)
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: encoder(e),
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width(w),
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height(h),
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render_time_ms(rtms),
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timestamp(ts),
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rotation(r) {}
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TGRTCVideoEncoderH265* encoder;
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int32_t width;
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int32_t height;
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int64_t render_time_ms;
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uint32_t timestamp;
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RTCVideoRotation rotation;
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};
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// We receive I420Frames as input, but we need to feed CVPixelBuffers into the
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// encoder. This performs the copy and format conversion.
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// TODO(tkchin): See if encoder will accept i420 frames and compare performance.
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bool CopyVideoFrameToPixelBuffer(id<RTCI420Buffer> frameBuffer,
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CVPixelBufferRef pixelBuffer) {
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RTC_DCHECK(pixelBuffer);
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RTC_DCHECK_EQ(CVPixelBufferGetPixelFormatType(pixelBuffer),
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kCVPixelFormatType_420YpCbCr8BiPlanarFullRange);
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RTC_DCHECK_EQ(CVPixelBufferGetHeightOfPlane(pixelBuffer, 0),
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frameBuffer.height);
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RTC_DCHECK_EQ(CVPixelBufferGetWidthOfPlane(pixelBuffer, 0),
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frameBuffer.width);
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CVReturn cvRet = CVPixelBufferLockBaseAddress(pixelBuffer, 0);
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if (cvRet != kCVReturnSuccess) {
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RTC_LOG(LS_ERROR) << "Failed to lock base address: " << cvRet;
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return false;
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}
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uint8_t* dstY = reinterpret_cast<uint8_t*>(
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CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 0));
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int dstStrideY = (int)CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 0);
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uint8_t* dstUV = reinterpret_cast<uint8_t*>(
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CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 1));
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int dstStrideUV = (int)CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 1);
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// Convert I420 to NV12.
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int ret = libyuv::I420ToNV12(
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frameBuffer.dataY, frameBuffer.strideY, frameBuffer.dataU,
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frameBuffer.strideU, frameBuffer.dataV, frameBuffer.strideV, dstY,
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dstStrideY, dstUV, dstStrideUV, frameBuffer.width, frameBuffer.height);
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CVPixelBufferUnlockBaseAddress(pixelBuffer, 0);
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if (ret) {
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RTC_LOG(LS_ERROR) << "Error converting I420 VideoFrame to NV12 :" << ret;
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return false;
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}
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return true;
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}
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CVPixelBufferRef CreatePixelBuffer(CVPixelBufferPoolRef pixel_buffer_pool) {
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if (!pixel_buffer_pool) {
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RTC_LOG(LS_ERROR) << "Failed to get pixel buffer pool.";
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return nullptr;
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}
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CVPixelBufferRef pixel_buffer;
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CVReturn ret = CVPixelBufferPoolCreatePixelBuffer(nullptr, pixel_buffer_pool,
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&pixel_buffer);
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if (ret != kCVReturnSuccess) {
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RTC_LOG(LS_ERROR) << "Failed to create pixel buffer: " << ret;
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// We probably want to drop frames here, since failure probably means
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// that the pool is empty.
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return nullptr;
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}
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return pixel_buffer;
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}
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// This is the callback function that VideoToolbox calls when encode is
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// complete. From inspection this happens on its own queue.
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void compressionOutputCallback(void* encoder,
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void* params,
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OSStatus status,
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VTEncodeInfoFlags infoFlags,
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CMSampleBufferRef sampleBuffer)
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API_AVAILABLE(ios(11.0)) {
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RTC_CHECK(params);
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std::unique_ptr<RTCFrameEncodeParams> encodeParams(
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reinterpret_cast<RTCFrameEncodeParams*>(params));
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RTC_CHECK(encodeParams->encoder);
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[encodeParams->encoder frameWasEncoded:status
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flags:infoFlags
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sampleBuffer:sampleBuffer
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width:encodeParams->width
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height:encodeParams->height
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renderTimeMs:encodeParams->render_time_ms
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timestamp:encodeParams->timestamp
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rotation:encodeParams->rotation];
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}
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} // namespace
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@implementation TGRTCVideoEncoderH265 {
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RTCVideoCodecInfo* _codecInfo;
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std::unique_ptr<webrtc::BitrateAdjuster> _bitrateAdjuster;
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uint32_t _targetBitrateBps;
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uint32_t _encoderBitrateBps;
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CFStringRef _profile;
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RTCVideoEncoderCallback _callback;
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int32_t _width;
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int32_t _height;
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VTCompressionSessionRef _compressionSession;
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RTCVideoCodecMode _mode;
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int framesLeft;
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webrtc::H265BitstreamParser _h265BitstreamParser;
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std::vector<uint8_t> _nv12ScaleBuffer;
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}
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// .5 is set as a mininum to prevent overcompensating for large temporary
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// overshoots. We don't want to degrade video quality too badly.
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// .95 is set to prevent oscillations. When a lower bitrate is set on the
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// encoder than previously set, its output seems to have a brief period of
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// drastically reduced bitrate, so we want to avoid that. In steady state
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// conditions, 0.95 seems to give us better overall bitrate over long periods
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// of time.
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- (instancetype)initWithCodecInfo:(RTCVideoCodecInfo*)codecInfo {
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if (self = [super init]) {
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_codecInfo = codecInfo;
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_bitrateAdjuster.reset(new webrtc::BitrateAdjuster(.5, .95));
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RTC_CHECK([codecInfo.name isEqualToString:@"H265"]);
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}
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return self;
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}
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- (void)dealloc {
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[self destroyCompressionSession];
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}
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- (NSInteger)startEncodeWithSettings:(RTCVideoEncoderSettings*)settings
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numberOfCores:(int)numberOfCores {
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RTC_DCHECK(settings);
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RTC_DCHECK([settings.name isEqualToString:@"H265"]);
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_width = settings.width;
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_height = settings.height;
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_mode = settings.mode;
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// We can only set average bitrate on the HW encoder.
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_targetBitrateBps = settings.startBitrate;
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_bitrateAdjuster->SetTargetBitrateBps(_targetBitrateBps);
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// TODO(tkchin): Try setting payload size via
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// kVTCompressionPropertyKey_Maxh265SliceBytes.
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return [self resetCompressionSession];
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}
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- (NSInteger)encode:(RTCVideoFrame*)frame
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codecSpecificInfo:(id<RTCCodecSpecificInfo>)codecSpecificInfo
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frameTypes:(NSArray<NSNumber*>*)frameTypes {
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RTC_DCHECK_EQ(frame.width, _width);
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RTC_DCHECK_EQ(frame.height, _height);
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if (!_callback || !_compressionSession) {
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return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
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}
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BOOL isKeyframeRequired = NO;
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// Get a pixel buffer from the pool and copy frame data over.
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CVPixelBufferPoolRef pixelBufferPool =
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VTCompressionSessionGetPixelBufferPool(_compressionSession);
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#if defined(WEBRTC_IOS)
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if (!pixelBufferPool) {
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// Kind of a hack. On backgrounding, the compression session seems to get
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// invalidated, which causes this pool call to fail when the application
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// is foregrounded and frames are being sent for encoding again.
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// Resetting the session when this happens fixes the issue.
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// In addition we request a keyframe so video can recover quickly.
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[self resetCompressionSession];
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pixelBufferPool =
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VTCompressionSessionGetPixelBufferPool(_compressionSession);
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isKeyframeRequired = YES;
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RTC_LOG(LS_INFO) << "Resetting compression session due to invalid pool.";
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}
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#endif
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CVPixelBufferRef pixelBuffer = nullptr;
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if ([frame.buffer isKindOfClass:[RTCCVPixelBuffer class]]) {
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// Native frame buffer
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RTCCVPixelBuffer* rtcPixelBuffer = (RTCCVPixelBuffer*)frame.buffer;
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if (![rtcPixelBuffer requiresCropping]) {
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// This pixel buffer might have a higher resolution than what the
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// compression session is configured to. The compression session can
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// handle that and will output encoded frames in the configured
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// resolution regardless of the input pixel buffer resolution.
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pixelBuffer = rtcPixelBuffer.pixelBuffer;
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CVBufferRetain(pixelBuffer);
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} else {
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// Cropping required, we need to crop and scale to a new pixel buffer.
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pixelBuffer = CreatePixelBuffer(pixelBufferPool);
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if (!pixelBuffer) {
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return WEBRTC_VIDEO_CODEC_ERROR;
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}
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int dstWidth = (int)CVPixelBufferGetWidth(pixelBuffer);
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int dstHeight = (int)CVPixelBufferGetHeight(pixelBuffer);
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if ([rtcPixelBuffer requiresScalingToWidth:dstWidth height:dstHeight]) {
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int size =
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[rtcPixelBuffer bufferSizeForCroppingAndScalingToWidth:dstWidth
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height:dstHeight];
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_nv12ScaleBuffer.resize(size);
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} else {
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_nv12ScaleBuffer.clear();
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}
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_nv12ScaleBuffer.shrink_to_fit();
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if (![rtcPixelBuffer cropAndScaleTo:pixelBuffer
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withTempBuffer:_nv12ScaleBuffer.data()]) {
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return WEBRTC_VIDEO_CODEC_ERROR;
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}
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}
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}
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if (!pixelBuffer) {
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// We did not have a native frame buffer
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pixelBuffer = CreatePixelBuffer(pixelBufferPool);
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if (!pixelBuffer) {
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return WEBRTC_VIDEO_CODEC_ERROR;
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}
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RTC_DCHECK(pixelBuffer);
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if (!CopyVideoFrameToPixelBuffer([frame.buffer toI420], pixelBuffer)) {
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RTC_LOG(LS_ERROR) << "Failed to copy frame data.";
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CVBufferRelease(pixelBuffer);
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return WEBRTC_VIDEO_CODEC_ERROR;
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}
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}
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// Check if we need a keyframe.
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if (!isKeyframeRequired && frameTypes) {
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for (NSNumber* frameType in frameTypes) {
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if ((RTCFrameType)frameType.intValue == RTCFrameTypeVideoFrameKey) {
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isKeyframeRequired = YES;
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break;
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}
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}
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}
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CMTime presentationTimeStamp =
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CMTimeMake(frame.timeStampNs / rtc::kNumNanosecsPerMillisec, 1000);
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CFDictionaryRef frameProperties = nullptr;
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if (isKeyframeRequired) {
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CFTypeRef keys[] = {kVTEncodeFrameOptionKey_ForceKeyFrame};
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CFTypeRef values[] = {kCFBooleanTrue};
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frameProperties = CreateCFTypeDictionary(keys, values, 1);
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}
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std::unique_ptr<RTCFrameEncodeParams> encodeParams;
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encodeParams.reset(new RTCFrameEncodeParams(
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self, _width, _height, frame.timeStampNs / rtc::kNumNanosecsPerMillisec,
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frame.timeStamp, frame.rotation));
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// Update the bitrate if needed.
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[self setBitrateBps:_bitrateAdjuster->GetAdjustedBitrateBps()];
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OSStatus status = VTCompressionSessionEncodeFrame(
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_compressionSession, pixelBuffer, presentationTimeStamp, kCMTimeInvalid,
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frameProperties, encodeParams.release(), nullptr);
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if (frameProperties) {
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CFRelease(frameProperties);
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}
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if (pixelBuffer) {
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CVBufferRelease(pixelBuffer);
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}
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if (status != noErr) {
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RTC_LOG(LS_ERROR) << "Failed to encode frame with code: " << status;
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return WEBRTC_VIDEO_CODEC_ERROR;
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}
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return WEBRTC_VIDEO_CODEC_OK;
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}
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- (void)setCallback:(RTCVideoEncoderCallback)callback {
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_callback = callback;
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}
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- (int)setBitrate:(uint32_t)bitrateKbit framerate:(uint32_t)framerate {
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_targetBitrateBps = 1000 * bitrateKbit;
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_bitrateAdjuster->SetTargetBitrateBps(_targetBitrateBps);
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[self setBitrateBps:_bitrateAdjuster->GetAdjustedBitrateBps()];
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return WEBRTC_VIDEO_CODEC_OK;
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}
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#pragma mark - Private
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- (NSInteger)releaseEncoder {
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// Need to destroy so that the session is invalidated and won't use the
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// callback anymore. Do not remove callback until the session is invalidated
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// since async encoder callbacks can occur until invalidation.
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[self destroyCompressionSession];
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_callback = nullptr;
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return WEBRTC_VIDEO_CODEC_OK;
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}
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- (int)resetCompressionSession {
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[self destroyCompressionSession];
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// Set source image buffer attributes. These attributes will be present on
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// buffers retrieved from the encoder's pixel buffer pool.
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const size_t attributesSize = 3;
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CFTypeRef keys[attributesSize] = {
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#if defined(WEBRTC_IOS)
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kCVPixelBufferOpenGLESCompatibilityKey,
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#elif defined(WEBRTC_MAC)
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kCVPixelBufferOpenGLCompatibilityKey,
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#endif
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kCVPixelBufferIOSurfacePropertiesKey,
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kCVPixelBufferPixelFormatTypeKey
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};
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CFDictionaryRef ioSurfaceValue = CreateCFTypeDictionary(nullptr, nullptr, 0);
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int64_t nv12type = kCVPixelFormatType_420YpCbCr8BiPlanarFullRange;
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CFNumberRef pixelFormat =
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CFNumberCreate(nullptr, kCFNumberLongType, &nv12type);
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CFTypeRef values[attributesSize] = {kCFBooleanTrue, ioSurfaceValue,
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pixelFormat};
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CFDictionaryRef sourceAttributes =
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CreateCFTypeDictionary(keys, values, attributesSize);
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if (ioSurfaceValue) {
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CFRelease(ioSurfaceValue);
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ioSurfaceValue = nullptr;
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}
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if (pixelFormat) {
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CFRelease(pixelFormat);
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pixelFormat = nullptr;
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}
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CFMutableDictionaryRef encoder_specs = nullptr;
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#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
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// Currently hw accl is supported above 360p on mac, below 360p
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// the compression session will be created with hw accl disabled.
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encoder_specs =
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CFDictionaryCreateMutable(nullptr, 1, &kCFTypeDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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CFDictionarySetValue(
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encoder_specs,
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kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder,
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kCFBooleanTrue);
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#endif
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OSStatus status = VTCompressionSessionCreate(
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nullptr, // use default allocator
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_width, _height, kCMVideoCodecType_HEVC,
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encoder_specs, // use hardware accelerated encoder if available
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sourceAttributes,
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nullptr, // use default compressed data allocator
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compressionOutputCallback, nullptr, &_compressionSession);
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if (sourceAttributes) {
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CFRelease(sourceAttributes);
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sourceAttributes = nullptr;
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}
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if (encoder_specs) {
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CFRelease(encoder_specs);
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encoder_specs = nullptr;
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}
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if (status != noErr) {
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RTC_LOG(LS_ERROR) << "Failed to create compression session: " << status;
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return WEBRTC_VIDEO_CODEC_ERROR;
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}
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#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
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CFBooleanRef hwaccl_enabled = nullptr;
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status = VTSessionCopyProperty(
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_compressionSession,
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kVTCompressionPropertyKey_UsingHardwareAcceleratedVideoEncoder, nullptr,
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&hwaccl_enabled);
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if (status == noErr && (CFBooleanGetValue(hwaccl_enabled))) {
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RTC_LOG(LS_INFO) << "Compression session created with hw accl enabled";
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} else {
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RTC_LOG(LS_INFO) << "Compression session created with hw accl disabled";
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}
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#endif
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[self configureCompressionSession];
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return WEBRTC_VIDEO_CODEC_OK;
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}
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- (void)configureCompressionSession {
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RTC_DCHECK(_compressionSession);
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SetVTSessionProperty(_compressionSession, kVTCompressionPropertyKey_RealTime,
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false);
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// SetVTSessionProperty(_compressionSession,
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// kVTCompressionPropertyKey_ProfileLevel, _profile);
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SetVTSessionProperty(_compressionSession,
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kVTCompressionPropertyKey_AllowFrameReordering, false);
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[self setEncoderBitrateBps:_targetBitrateBps];
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// TODO(tkchin): Look at entropy mode and colorspace matrices.
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// TODO(tkchin): Investigate to see if there's any way to make this work.
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// May need it to interop with Android. Currently this call just fails.
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// On inspecting encoder output on iOS8, this value is set to 6.
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// internal::SetVTSessionProperty(compression_session_,
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// kVTCompressionPropertyKey_MaxFrameDelayCount,
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// 1);
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// Set a relatively large value for keyframe emission (7200 frames or 4
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// minutes).
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SetVTSessionProperty(_compressionSession,
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kVTCompressionPropertyKey_MaxKeyFrameInterval, 7200);
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SetVTSessionProperty(_compressionSession,
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kVTCompressionPropertyKey_MaxKeyFrameIntervalDuration,
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240);
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OSStatus status =
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VTCompressionSessionPrepareToEncodeFrames(_compressionSession);
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if (status != noErr) {
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RTC_LOG(LS_ERROR) << "Compression session failed to prepare encode frames.";
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}
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}
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- (void)destroyCompressionSession {
|
|
if (_compressionSession) {
|
|
VTCompressionSessionInvalidate(_compressionSession);
|
|
CFRelease(_compressionSession);
|
|
_compressionSession = nullptr;
|
|
}
|
|
}
|
|
|
|
- (NSString*)implementationName {
|
|
return @"VideoToolbox";
|
|
}
|
|
|
|
- (void)setBitrateBps:(uint32_t)bitrateBps {
|
|
if (_encoderBitrateBps != bitrateBps) {
|
|
[self setEncoderBitrateBps:bitrateBps];
|
|
}
|
|
}
|
|
|
|
- (void)setEncoderBitrateBps:(uint32_t)bitrateBps {
|
|
if (_compressionSession) {
|
|
SetVTSessionProperty(_compressionSession,
|
|
kVTCompressionPropertyKey_AverageBitRate, bitrateBps);
|
|
|
|
// TODO(tkchin): Add a helper method to set array value.
|
|
int64_t dataLimitBytesPerSecondValue =
|
|
static_cast<int64_t>(bitrateBps * kLimitToAverageBitRateFactor / 8);
|
|
CFNumberRef bytesPerSecond =
|
|
CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt64Type,
|
|
&dataLimitBytesPerSecondValue);
|
|
int64_t oneSecondValue = 1;
|
|
CFNumberRef oneSecond = CFNumberCreate(
|
|
kCFAllocatorDefault, kCFNumberSInt64Type, &oneSecondValue);
|
|
const void* nums[2] = {bytesPerSecond, oneSecond};
|
|
CFArrayRef dataRateLimits =
|
|
CFArrayCreate(nullptr, nums, 2, &kCFTypeArrayCallBacks);
|
|
OSStatus status = VTSessionSetProperty(
|
|
_compressionSession, kVTCompressionPropertyKey_DataRateLimits,
|
|
dataRateLimits);
|
|
if (bytesPerSecond) {
|
|
CFRelease(bytesPerSecond);
|
|
}
|
|
if (oneSecond) {
|
|
CFRelease(oneSecond);
|
|
}
|
|
if (dataRateLimits) {
|
|
CFRelease(dataRateLimits);
|
|
}
|
|
if (status != noErr) {
|
|
RTC_LOG(LS_ERROR) << "Failed to set data rate limit";
|
|
}
|
|
|
|
_encoderBitrateBps = bitrateBps;
|
|
}
|
|
}
|
|
|
|
- (void)frameWasEncoded:(OSStatus)status
|
|
flags:(VTEncodeInfoFlags)infoFlags
|
|
sampleBuffer:(CMSampleBufferRef)sampleBuffer
|
|
width:(int32_t)width
|
|
height:(int32_t)height
|
|
renderTimeMs:(int64_t)renderTimeMs
|
|
timestamp:(uint32_t)timestamp
|
|
rotation:(RTCVideoRotation)rotation {
|
|
if (status != noErr) {
|
|
RTC_LOG(LS_ERROR) << "h265 encode failed.";
|
|
return;
|
|
}
|
|
if (infoFlags & kVTEncodeInfo_FrameDropped) {
|
|
RTC_LOG(LS_INFO) << "h265 encoder dropped a frame.";
|
|
return;
|
|
}
|
|
|
|
BOOL isKeyframe = NO;
|
|
CFArrayRef attachments =
|
|
CMSampleBufferGetSampleAttachmentsArray(sampleBuffer, 0);
|
|
if (attachments != nullptr && CFArrayGetCount(attachments)) {
|
|
CFDictionaryRef attachment =
|
|
static_cast<CFDictionaryRef>(CFArrayGetValueAtIndex(attachments, 0));
|
|
isKeyframe =
|
|
!CFDictionaryContainsKey(attachment, kCMSampleAttachmentKey_NotSync);
|
|
}
|
|
|
|
if (isKeyframe) {
|
|
RTC_LOG(LS_INFO) << "Generated keyframe";
|
|
}
|
|
|
|
// Convert the sample buffer into a buffer suitable for RTP packetization.
|
|
// TODO(tkchin): Allocate buffers through a pool.
|
|
std::unique_ptr<rtc::Buffer> buffer(new rtc::Buffer());
|
|
RTCRtpFragmentationHeader* header;
|
|
{
|
|
std::unique_ptr<webrtc::RTPFragmentationHeader> header_cpp;
|
|
bool result = H265CMSampleBufferToAnnexBBuffer(sampleBuffer, isKeyframe,
|
|
buffer.get(), &header_cpp);
|
|
header = [[RTCRtpFragmentationHeader alloc]
|
|
initWithNativeFragmentationHeader:header_cpp.get()];
|
|
if (!result) {
|
|
RTC_LOG(LS_ERROR) << "Failed to convert sample buffer.";
|
|
return;
|
|
}
|
|
}
|
|
|
|
RTCEncodedImage* frame = [[RTCEncodedImage alloc] init];
|
|
frame.buffer = [NSData dataWithBytesNoCopy:buffer->data()
|
|
length:buffer->size()
|
|
freeWhenDone:NO];
|
|
frame.encodedWidth = width;
|
|
frame.encodedHeight = height;
|
|
frame.completeFrame = YES;
|
|
frame.frameType =
|
|
isKeyframe ? RTCFrameTypeVideoFrameKey : RTCFrameTypeVideoFrameDelta;
|
|
frame.captureTimeMs = renderTimeMs;
|
|
frame.timeStamp = timestamp;
|
|
frame.rotation = rotation;
|
|
frame.contentType = (_mode == RTCVideoCodecModeScreensharing)
|
|
? RTCVideoContentTypeScreenshare
|
|
: RTCVideoContentTypeUnspecified;
|
|
frame.flags = webrtc::VideoSendTiming::kInvalid;
|
|
|
|
int qp;
|
|
_h265BitstreamParser.ParseBitstream(buffer->data(), buffer->size());
|
|
_h265BitstreamParser.GetLastSliceQp(&qp);
|
|
frame.qp = @(qp);
|
|
|
|
BOOL res = _callback(frame, [[RTCCodecSpecificInfoH265 alloc] init], header);
|
|
if (!res) {
|
|
RTC_LOG(LS_ERROR) << "Encode callback failed.";
|
|
return;
|
|
}
|
|
_bitrateAdjuster->Update(frame.buffer.length);
|
|
}
|
|
|
|
- (RTCVideoEncoderQpThresholds*)scalingSettings {
|
|
return [[RTCVideoEncoderQpThresholds alloc]
|
|
initWithThresholdsLow:kLowh265QpThreshold
|
|
high:kHighh265QpThreshold];
|
|
}
|
|
|
|
@end
|