c32a509da0
This exports neccessary API as dependency for h.265 parameter sets tracker to be submitted at CL:5307256. Bug: webrtc:13485 Change-Id: I042599472f17d12ece4fa862c3715497502a5d76 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/340004 Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Jianlin Qiu <jianlin.qiu@intel.com> Cr-Commit-Position: refs/heads/main@{#41814}
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2023 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.
|
|
*/
|
|
|
|
#ifndef COMMON_VIDEO_H265_H265_PPS_PARSER_H_
|
|
#define COMMON_VIDEO_H265_H265_PPS_PARSER_H_
|
|
|
|
#include "absl/types/optional.h"
|
|
#include "api/array_view.h"
|
|
#include "common_video/h265/h265_sps_parser.h"
|
|
#include "rtc_base/bitstream_reader.h"
|
|
#include "rtc_base/system/rtc_export.h"
|
|
|
|
namespace webrtc {
|
|
|
|
// A class for parsing out picture parameter set (PPS) data from a H265 NALU.
|
|
class RTC_EXPORT H265PpsParser {
|
|
public:
|
|
// The parsed state of the PPS. Only some select values are stored.
|
|
// Add more as they are actually needed.
|
|
struct PpsState {
|
|
PpsState() = default;
|
|
|
|
bool dependent_slice_segments_enabled_flag = false;
|
|
bool cabac_init_present_flag = false;
|
|
bool output_flag_present_flag = false;
|
|
uint32_t num_extra_slice_header_bits = 0;
|
|
uint32_t num_ref_idx_l0_default_active_minus1 = 0;
|
|
uint32_t num_ref_idx_l1_default_active_minus1 = 0;
|
|
int init_qp_minus26 = 0;
|
|
bool weighted_pred_flag = false;
|
|
bool weighted_bipred_flag = false;
|
|
bool lists_modification_present_flag = false;
|
|
uint32_t pps_id = 0;
|
|
uint32_t sps_id = 0;
|
|
int qp_bd_offset_y = 0;
|
|
};
|
|
|
|
// Unpack RBSP and parse PPS state from the supplied buffer.
|
|
static absl::optional<PpsState> ParsePps(const uint8_t* data,
|
|
size_t length,
|
|
const H265SpsParser::SpsState* sps);
|
|
|
|
static bool ParsePpsIds(const uint8_t* data,
|
|
size_t length,
|
|
uint32_t* pps_id,
|
|
uint32_t* sps_id);
|
|
|
|
protected:
|
|
// Parse the PPS state, for a bit buffer where RBSP decoding has already been
|
|
// performed.
|
|
static absl::optional<PpsState> ParseInternal(
|
|
rtc::ArrayView<const uint8_t> buffer,
|
|
const H265SpsParser::SpsState* sps);
|
|
static bool ParsePpsIdsInternal(BitstreamReader& reader,
|
|
uint32_t& pps_id,
|
|
uint32_t& sps_id);
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // COMMON_VIDEO_H265_H265_PPS_PARSER_H_
|