509 lines
19 KiB
C++
509 lines
19 KiB
C++
/*
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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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#include "call/rtp_payload_params.h"
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#include <stddef.h>
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#include <algorithm>
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#include "absl/container/inlined_vector.h"
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#include "absl/strings/match.h"
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#include "absl/types/variant.h"
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#include "api/video/video_timing.h"
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#include "modules/video_coding/codecs/h264/include/h264_globals.h"
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#include "modules/video_coding/codecs/interface/common_constants.h"
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#include "modules/video_coding/codecs/vp8/include/vp8_globals.h"
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#include "modules/video_coding/codecs/vp9/include/vp9_globals.h"
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#include "modules/video_coding/frame_dependencies_calculator.h"
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#include "rtc_base/arraysize.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/logging.h"
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#include "rtc_base/random.h"
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#include "rtc_base/time_utils.h"
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namespace webrtc {
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namespace {
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void PopulateRtpWithCodecSpecifics(const CodecSpecificInfo& info,
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absl::optional<int> spatial_index,
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RTPVideoHeader* rtp) {
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rtp->codec = info.codecType;
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rtp->is_last_frame_in_picture = info.end_of_picture;
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switch (info.codecType) {
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case kVideoCodecVP8: {
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auto& vp8_header = rtp->video_type_header.emplace<RTPVideoHeaderVP8>();
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vp8_header.InitRTPVideoHeaderVP8();
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vp8_header.nonReference = info.codecSpecific.VP8.nonReference;
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vp8_header.temporalIdx = info.codecSpecific.VP8.temporalIdx;
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vp8_header.layerSync = info.codecSpecific.VP8.layerSync;
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vp8_header.keyIdx = info.codecSpecific.VP8.keyIdx;
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rtp->simulcastIdx = spatial_index.value_or(0);
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return;
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}
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case kVideoCodecVP9: {
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auto& vp9_header = rtp->video_type_header.emplace<RTPVideoHeaderVP9>();
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vp9_header.InitRTPVideoHeaderVP9();
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vp9_header.inter_pic_predicted =
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info.codecSpecific.VP9.inter_pic_predicted;
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vp9_header.flexible_mode = info.codecSpecific.VP9.flexible_mode;
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vp9_header.ss_data_available = info.codecSpecific.VP9.ss_data_available;
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vp9_header.non_ref_for_inter_layer_pred =
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info.codecSpecific.VP9.non_ref_for_inter_layer_pred;
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vp9_header.temporal_idx = info.codecSpecific.VP9.temporal_idx;
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vp9_header.temporal_up_switch = info.codecSpecific.VP9.temporal_up_switch;
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vp9_header.inter_layer_predicted =
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info.codecSpecific.VP9.inter_layer_predicted;
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vp9_header.gof_idx = info.codecSpecific.VP9.gof_idx;
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vp9_header.num_spatial_layers = info.codecSpecific.VP9.num_spatial_layers;
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vp9_header.first_active_layer = info.codecSpecific.VP9.first_active_layer;
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if (vp9_header.num_spatial_layers > 1) {
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vp9_header.spatial_idx = spatial_index.value_or(kNoSpatialIdx);
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} else {
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vp9_header.spatial_idx = kNoSpatialIdx;
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}
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if (info.codecSpecific.VP9.ss_data_available) {
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vp9_header.spatial_layer_resolution_present =
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info.codecSpecific.VP9.spatial_layer_resolution_present;
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if (info.codecSpecific.VP9.spatial_layer_resolution_present) {
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for (size_t i = 0; i < info.codecSpecific.VP9.num_spatial_layers;
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++i) {
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vp9_header.width[i] = info.codecSpecific.VP9.width[i];
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vp9_header.height[i] = info.codecSpecific.VP9.height[i];
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}
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}
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vp9_header.gof.CopyGofInfoVP9(info.codecSpecific.VP9.gof);
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}
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vp9_header.num_ref_pics = info.codecSpecific.VP9.num_ref_pics;
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for (int i = 0; i < info.codecSpecific.VP9.num_ref_pics; ++i) {
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vp9_header.pid_diff[i] = info.codecSpecific.VP9.p_diff[i];
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}
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vp9_header.end_of_picture = info.end_of_picture;
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return;
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}
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case kVideoCodecH264: {
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auto& h264_header = rtp->video_type_header.emplace<RTPVideoHeaderH264>();
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h264_header.packetization_mode =
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info.codecSpecific.H264.packetization_mode;
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rtp->simulcastIdx = spatial_index.value_or(0);
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return;
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}
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#ifndef DISABLE_H265
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case kVideoCodecH265: {
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auto& h265_header = rtp->video_type_header.emplace<RTPVideoHeaderH265>();
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h265_header.packetization_mode =
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info.codecSpecific.H265.packetization_mode;
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}
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return;
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#endif
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case kVideoCodecMultiplex:
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case kVideoCodecGeneric:
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rtp->codec = kVideoCodecGeneric;
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rtp->simulcastIdx = spatial_index.value_or(0);
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return;
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default:
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return;
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}
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}
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void SetVideoTiming(const EncodedImage& image, VideoSendTiming* timing) {
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if (image.timing_.flags == VideoSendTiming::TimingFrameFlags::kInvalid ||
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image.timing_.flags == VideoSendTiming::TimingFrameFlags::kNotTriggered) {
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timing->flags = VideoSendTiming::TimingFrameFlags::kInvalid;
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return;
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}
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timing->encode_start_delta_ms = VideoSendTiming::GetDeltaCappedMs(
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image.capture_time_ms_, image.timing_.encode_start_ms);
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timing->encode_finish_delta_ms = VideoSendTiming::GetDeltaCappedMs(
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image.capture_time_ms_, image.timing_.encode_finish_ms);
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timing->packetization_finish_delta_ms = 0;
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timing->pacer_exit_delta_ms = 0;
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timing->network_timestamp_delta_ms = 0;
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timing->network2_timestamp_delta_ms = 0;
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timing->flags = image.timing_.flags;
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}
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} // namespace
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RtpPayloadParams::RtpPayloadParams(const uint32_t ssrc,
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const RtpPayloadState* state,
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const WebRtcKeyValueConfig& trials)
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: ssrc_(ssrc),
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generic_picture_id_experiment_(
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absl::StartsWith(trials.Lookup("WebRTC-GenericPictureId"),
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"Enabled")) {
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for (auto& spatial_layer : last_shared_frame_id_)
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spatial_layer.fill(-1);
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buffer_id_to_frame_id_.fill(-1);
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Random random(rtc::TimeMicros());
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state_.picture_id =
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state ? state->picture_id : (random.Rand<int16_t>() & 0x7FFF);
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state_.tl0_pic_idx = state ? state->tl0_pic_idx : (random.Rand<uint8_t>());
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}
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RtpPayloadParams::RtpPayloadParams(const RtpPayloadParams& other) = default;
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RtpPayloadParams::~RtpPayloadParams() {}
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RTPVideoHeader RtpPayloadParams::GetRtpVideoHeader(
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const EncodedImage& image,
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const CodecSpecificInfo* codec_specific_info,
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int64_t shared_frame_id) {
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RTPVideoHeader rtp_video_header;
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if (codec_specific_info) {
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PopulateRtpWithCodecSpecifics(*codec_specific_info, image.SpatialIndex(),
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&rtp_video_header);
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}
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rtp_video_header.frame_type = image._frameType,
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rtp_video_header.rotation = image.rotation_;
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rtp_video_header.content_type = image.content_type_;
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rtp_video_header.playout_delay = image.playout_delay_;
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rtp_video_header.width = image._encodedWidth;
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rtp_video_header.height = image._encodedHeight;
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rtp_video_header.color_space = image.ColorSpace()
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? absl::make_optional(*image.ColorSpace())
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: absl::nullopt;
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SetVideoTiming(image, &rtp_video_header.video_timing);
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const bool is_keyframe = image._frameType == VideoFrameType::kVideoFrameKey;
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const bool first_frame_in_picture =
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(codec_specific_info && codec_specific_info->codecType == kVideoCodecVP9)
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? codec_specific_info->codecSpecific.VP9.first_frame_in_picture
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: true;
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SetCodecSpecific(&rtp_video_header, first_frame_in_picture);
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SetGeneric(codec_specific_info, shared_frame_id, is_keyframe,
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&rtp_video_header);
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return rtp_video_header;
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}
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uint32_t RtpPayloadParams::ssrc() const {
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return ssrc_;
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}
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RtpPayloadState RtpPayloadParams::state() const {
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return state_;
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}
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void RtpPayloadParams::SetCodecSpecific(RTPVideoHeader* rtp_video_header,
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bool first_frame_in_picture) {
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// Always set picture id. Set tl0_pic_idx iff temporal index is set.
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if (first_frame_in_picture) {
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state_.picture_id = (static_cast<uint16_t>(state_.picture_id) + 1) & 0x7FFF;
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}
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if (rtp_video_header->codec == kVideoCodecVP8) {
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auto& vp8_header =
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absl::get<RTPVideoHeaderVP8>(rtp_video_header->video_type_header);
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vp8_header.pictureId = state_.picture_id;
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if (vp8_header.temporalIdx != kNoTemporalIdx) {
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if (vp8_header.temporalIdx == 0) {
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++state_.tl0_pic_idx;
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}
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vp8_header.tl0PicIdx = state_.tl0_pic_idx;
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}
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}
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if (rtp_video_header->codec == kVideoCodecVP9) {
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auto& vp9_header =
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absl::get<RTPVideoHeaderVP9>(rtp_video_header->video_type_header);
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vp9_header.picture_id = state_.picture_id;
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// Note that in the case that we have no temporal layers but we do have
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// spatial layers, packets will carry layering info with a temporal_idx of
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// zero, and we then have to set and increment tl0_pic_idx.
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if (vp9_header.temporal_idx != kNoTemporalIdx ||
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vp9_header.spatial_idx != kNoSpatialIdx) {
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if (first_frame_in_picture &&
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(vp9_header.temporal_idx == 0 ||
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vp9_header.temporal_idx == kNoTemporalIdx)) {
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++state_.tl0_pic_idx;
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}
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vp9_header.tl0_pic_idx = state_.tl0_pic_idx;
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}
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}
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if (generic_picture_id_experiment_ &&
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rtp_video_header->codec == kVideoCodecGeneric) {
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rtp_video_header->video_type_header.emplace<RTPVideoHeaderLegacyGeneric>()
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.picture_id = state_.picture_id;
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}
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}
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RTPVideoHeader::GenericDescriptorInfo
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RtpPayloadParams::GenericDescriptorFromFrameInfo(
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const GenericFrameInfo& frame_info,
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int64_t frame_id,
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VideoFrameType frame_type) {
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RTPVideoHeader::GenericDescriptorInfo generic;
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generic.frame_id = frame_id;
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generic.dependencies = dependencies_calculator_.FromBuffersUsage(
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frame_type, frame_id, frame_info.encoder_buffers);
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generic.chain_diffs =
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chains_calculator_.From(frame_id, frame_info.part_of_chain);
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generic.spatial_index = frame_info.spatial_id;
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generic.temporal_index = frame_info.temporal_id;
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generic.decode_target_indications = frame_info.decode_target_indications;
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generic.active_decode_targets = frame_info.active_decode_targets;
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return generic;
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}
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void RtpPayloadParams::SetGeneric(const CodecSpecificInfo* codec_specific_info,
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int64_t frame_id,
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bool is_keyframe,
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RTPVideoHeader* rtp_video_header) {
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if (codec_specific_info && codec_specific_info->generic_frame_info &&
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!codec_specific_info->generic_frame_info->encoder_buffers.empty()) {
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if (is_keyframe) {
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// Key frame resets all chains it is in.
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chains_calculator_.Reset(
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codec_specific_info->generic_frame_info->part_of_chain);
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}
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rtp_video_header->generic =
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GenericDescriptorFromFrameInfo(*codec_specific_info->generic_frame_info,
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frame_id, rtp_video_header->frame_type);
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return;
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}
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switch (rtp_video_header->codec) {
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case VideoCodecType::kVideoCodecGeneric:
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GenericToGeneric(frame_id, is_keyframe, rtp_video_header);
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return;
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case VideoCodecType::kVideoCodecVP8:
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if (codec_specific_info) {
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Vp8ToGeneric(codec_specific_info->codecSpecific.VP8, frame_id,
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is_keyframe, rtp_video_header);
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}
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return;
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case VideoCodecType::kVideoCodecVP9:
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case VideoCodecType::kVideoCodecAV1:
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// TODO(philipel): Implement VP9 and AV1 to generic descriptor.
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return;
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case VideoCodecType::kVideoCodecH264:
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if (codec_specific_info) {
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H264ToGeneric(codec_specific_info->codecSpecific.H264, frame_id,
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is_keyframe, rtp_video_header);
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}
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return;
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#ifndef DISABLE_H265
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case VideoCodecType::kVideoCodecH265:
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#endif
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case VideoCodecType::kVideoCodecMultiplex:
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return;
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}
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RTC_NOTREACHED() << "Unsupported codec.";
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}
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void RtpPayloadParams::GenericToGeneric(int64_t shared_frame_id,
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bool is_keyframe,
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RTPVideoHeader* rtp_video_header) {
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RTPVideoHeader::GenericDescriptorInfo& generic =
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rtp_video_header->generic.emplace();
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generic.frame_id = shared_frame_id;
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if (is_keyframe) {
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last_shared_frame_id_[0].fill(-1);
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} else {
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int64_t frame_id = last_shared_frame_id_[0][0];
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RTC_DCHECK_NE(frame_id, -1);
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RTC_DCHECK_LT(frame_id, shared_frame_id);
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generic.dependencies.push_back(frame_id);
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}
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last_shared_frame_id_[0][0] = shared_frame_id;
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}
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void RtpPayloadParams::H264ToGeneric(const CodecSpecificInfoH264& h264_info,
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int64_t shared_frame_id,
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bool is_keyframe,
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RTPVideoHeader* rtp_video_header) {
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const int temporal_index =
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h264_info.temporal_idx != kNoTemporalIdx ? h264_info.temporal_idx : 0;
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if (temporal_index >= RtpGenericFrameDescriptor::kMaxTemporalLayers) {
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RTC_LOG(LS_WARNING) << "Temporal and/or spatial index is too high to be "
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"used with generic frame descriptor.";
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return;
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}
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RTPVideoHeader::GenericDescriptorInfo& generic =
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rtp_video_header->generic.emplace();
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generic.frame_id = shared_frame_id;
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generic.temporal_index = temporal_index;
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if (is_keyframe) {
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RTC_DCHECK_EQ(temporal_index, 0);
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last_shared_frame_id_[/*spatial index*/ 0].fill(-1);
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last_shared_frame_id_[/*spatial index*/ 0][temporal_index] =
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shared_frame_id;
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return;
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}
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if (h264_info.base_layer_sync) {
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int64_t tl0_frame_id = last_shared_frame_id_[/*spatial index*/ 0][0];
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for (int i = 1; i < RtpGenericFrameDescriptor::kMaxTemporalLayers; ++i) {
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if (last_shared_frame_id_[/*spatial index*/ 0][i] < tl0_frame_id) {
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last_shared_frame_id_[/*spatial index*/ 0][i] = -1;
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}
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}
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RTC_DCHECK_GE(tl0_frame_id, 0);
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RTC_DCHECK_LT(tl0_frame_id, shared_frame_id);
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generic.dependencies.push_back(tl0_frame_id);
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} else {
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for (int i = 0; i <= temporal_index; ++i) {
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int64_t frame_id = last_shared_frame_id_[/*spatial index*/ 0][i];
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if (frame_id != -1) {
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RTC_DCHECK_LT(frame_id, shared_frame_id);
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generic.dependencies.push_back(frame_id);
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}
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}
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}
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last_shared_frame_id_[/*spatial_index*/ 0][temporal_index] = shared_frame_id;
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}
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void RtpPayloadParams::Vp8ToGeneric(const CodecSpecificInfoVP8& vp8_info,
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int64_t shared_frame_id,
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bool is_keyframe,
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RTPVideoHeader* rtp_video_header) {
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const auto& vp8_header =
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absl::get<RTPVideoHeaderVP8>(rtp_video_header->video_type_header);
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const int spatial_index = 0;
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const int temporal_index =
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vp8_header.temporalIdx != kNoTemporalIdx ? vp8_header.temporalIdx : 0;
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if (temporal_index >= RtpGenericFrameDescriptor::kMaxTemporalLayers ||
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spatial_index >= RtpGenericFrameDescriptor::kMaxSpatialLayers) {
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RTC_LOG(LS_WARNING) << "Temporal and/or spatial index is too high to be "
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"used with generic frame descriptor.";
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return;
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}
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RTPVideoHeader::GenericDescriptorInfo& generic =
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rtp_video_header->generic.emplace();
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generic.frame_id = shared_frame_id;
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generic.spatial_index = spatial_index;
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generic.temporal_index = temporal_index;
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if (vp8_info.useExplicitDependencies) {
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SetDependenciesVp8New(vp8_info, shared_frame_id, is_keyframe,
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vp8_header.layerSync, &generic);
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} else {
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SetDependenciesVp8Deprecated(vp8_info, shared_frame_id, is_keyframe,
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spatial_index, temporal_index,
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vp8_header.layerSync, &generic);
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}
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}
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void RtpPayloadParams::SetDependenciesVp8Deprecated(
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const CodecSpecificInfoVP8& vp8_info,
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int64_t shared_frame_id,
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bool is_keyframe,
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int spatial_index,
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int temporal_index,
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bool layer_sync,
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RTPVideoHeader::GenericDescriptorInfo* generic) {
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RTC_DCHECK(!vp8_info.useExplicitDependencies);
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RTC_DCHECK(!new_version_used_.has_value() || !new_version_used_.value());
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new_version_used_ = false;
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if (is_keyframe) {
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RTC_DCHECK_EQ(temporal_index, 0);
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last_shared_frame_id_[spatial_index].fill(-1);
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last_shared_frame_id_[spatial_index][temporal_index] = shared_frame_id;
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return;
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}
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if (layer_sync) {
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int64_t tl0_frame_id = last_shared_frame_id_[spatial_index][0];
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for (int i = 1; i < RtpGenericFrameDescriptor::kMaxTemporalLayers; ++i) {
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if (last_shared_frame_id_[spatial_index][i] < tl0_frame_id) {
|
|
last_shared_frame_id_[spatial_index][i] = -1;
|
|
}
|
|
}
|
|
|
|
RTC_DCHECK_GE(tl0_frame_id, 0);
|
|
RTC_DCHECK_LT(tl0_frame_id, shared_frame_id);
|
|
generic->dependencies.push_back(tl0_frame_id);
|
|
} else {
|
|
for (int i = 0; i <= temporal_index; ++i) {
|
|
int64_t frame_id = last_shared_frame_id_[spatial_index][i];
|
|
|
|
if (frame_id != -1) {
|
|
RTC_DCHECK_LT(frame_id, shared_frame_id);
|
|
generic->dependencies.push_back(frame_id);
|
|
}
|
|
}
|
|
}
|
|
|
|
last_shared_frame_id_[spatial_index][temporal_index] = shared_frame_id;
|
|
}
|
|
|
|
void RtpPayloadParams::SetDependenciesVp8New(
|
|
const CodecSpecificInfoVP8& vp8_info,
|
|
int64_t shared_frame_id,
|
|
bool is_keyframe,
|
|
bool layer_sync,
|
|
RTPVideoHeader::GenericDescriptorInfo* generic) {
|
|
RTC_DCHECK(vp8_info.useExplicitDependencies);
|
|
RTC_DCHECK(!new_version_used_.has_value() || new_version_used_.value());
|
|
new_version_used_ = true;
|
|
|
|
if (is_keyframe) {
|
|
RTC_DCHECK_EQ(vp8_info.referencedBuffersCount, 0u);
|
|
buffer_id_to_frame_id_.fill(shared_frame_id);
|
|
return;
|
|
}
|
|
|
|
constexpr size_t kBuffersCountVp8 = CodecSpecificInfoVP8::kBuffersCount;
|
|
|
|
RTC_DCHECK_GT(vp8_info.referencedBuffersCount, 0u);
|
|
RTC_DCHECK_LE(vp8_info.referencedBuffersCount,
|
|
arraysize(vp8_info.referencedBuffers));
|
|
|
|
for (size_t i = 0; i < vp8_info.referencedBuffersCount; ++i) {
|
|
const size_t referenced_buffer = vp8_info.referencedBuffers[i];
|
|
RTC_DCHECK_LT(referenced_buffer, kBuffersCountVp8);
|
|
RTC_DCHECK_LT(referenced_buffer, buffer_id_to_frame_id_.size());
|
|
|
|
const int64_t dependency_frame_id =
|
|
buffer_id_to_frame_id_[referenced_buffer];
|
|
RTC_DCHECK_GE(dependency_frame_id, 0);
|
|
RTC_DCHECK_LT(dependency_frame_id, shared_frame_id);
|
|
|
|
const bool is_new_dependency =
|
|
std::find(generic->dependencies.begin(), generic->dependencies.end(),
|
|
dependency_frame_id) == generic->dependencies.end();
|
|
if (is_new_dependency) {
|
|
generic->dependencies.push_back(dependency_frame_id);
|
|
}
|
|
}
|
|
|
|
RTC_DCHECK_LE(vp8_info.updatedBuffersCount, kBuffersCountVp8);
|
|
for (size_t i = 0; i < vp8_info.updatedBuffersCount; ++i) {
|
|
const size_t updated_id = vp8_info.updatedBuffers[i];
|
|
buffer_id_to_frame_id_[updated_id] = shared_frame_id;
|
|
}
|
|
|
|
RTC_DCHECK_LE(buffer_id_to_frame_id_.size(), kBuffersCountVp8);
|
|
}
|
|
|
|
} // namespace webrtc
|