chromium/third_party/blink/renderer/platform/peerconnection/resolution_monitor.cc

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "third_party/blink/renderer/platform/peerconnection/resolution_monitor.h"

#include <bitset>

#include "base/containers/span.h"
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/notreached.h"
#include "base/numerics/safe_conversions.h"
#include "media/base/decoder_buffer.h"
#include "media/parsers/vp8_parser.h"
#include "media/parsers/vp9_parser.h"
#include "third_party/abseil-cpp/absl/types/variant.h"
#include "third_party/libgav1/src/src/buffer_pool.h"
#include "third_party/libgav1/src/src/decoder_state.h"
#include "third_party/libgav1/src/src/obu_parser.h"
#include "third_party/webrtc/common_video/h264/h264_common.h"
#include "third_party/webrtc/common_video/h264/sps_parser.h"

namespace blink {

namespace {

class Vp8ResolutionMonitor : public ResolutionMonitor { … };

class Vp9ResolutionMonitor : public ResolutionMonitor { … };

class Av1ResolutionMonitor : public ResolutionMonitor { … };

// H264ResolutionMonitor has two assumptions.
// (1) SPS and PPS come in bundle with IDR.
// (2) The buffer has only one IDR and it associates with the SPS in the bundle.
// This is satisfied in WebRTC use case.
class H264ResolutionMonitor : public ResolutionMonitor { … };
}  // namespace

ResolutionMonitor::~ResolutionMonitor() = default;

// static
std::unique_ptr<ResolutionMonitor> ResolutionMonitor::Create(
    media::VideoCodec codec) { … }

}  // namespace blink