summaryrefslogtreecommitdiffstats
path: root/chromium/content/common/gpu/media/h264_parser.h
diff options
context:
space:
mode:
Diffstat (limited to 'chromium/content/common/gpu/media/h264_parser.h')
-rw-r--r--chromium/content/common/gpu/media/h264_parser.h355
1 files changed, 0 insertions, 355 deletions
diff --git a/chromium/content/common/gpu/media/h264_parser.h b/chromium/content/common/gpu/media/h264_parser.h
deleted file mode 100644
index a4ab521f9fa..00000000000
--- a/chromium/content/common/gpu/media/h264_parser.h
+++ /dev/null
@@ -1,355 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-//
-// This file contains an implementation of an H264 Annex-B video stream parser.
-
-#ifndef CONTENT_COMMON_GPU_MEDIA_H264_PARSER_H_
-#define CONTENT_COMMON_GPU_MEDIA_H264_PARSER_H_
-
-#include <sys/types.h>
-
-#include <map>
-
-#include "base/basictypes.h"
-#include "content/common/content_export.h"
-#include "content/common/gpu/media/h264_bit_reader.h"
-
-namespace content {
-
-// For explanations of each struct and its members, see H.264 specification
-// at http://www.itu.int/rec/T-REC-H.264.
-struct CONTENT_EXPORT H264NALU {
- H264NALU();
-
- enum Type {
- kUnspecified = 0,
- kNonIDRSlice = 1,
- kIDRSlice = 5,
- kSEIMessage = 6,
- kSPS = 7,
- kPPS = 8,
- kEOSeq = 9,
- kEOStream = 11,
- kCodedSliceExtension = 20,
- };
-
- // After (without) start code; we don't own the underlying memory
- // and a shallow copy should be made when copying this struct.
- const uint8* data;
- off_t size; // From after start code to start code of next NALU (or EOS).
-
- int nal_ref_idc;
- int nal_unit_type;
-};
-
-enum { kH264ScalingList4x4Length = 16, kH264ScalingList8x8Length = 64, };
-
-struct CONTENT_EXPORT H264SPS {
- H264SPS();
-
- int profile_idc;
- int constraint_setx_flag;
- int level_idc;
- int seq_parameter_set_id;
-
- int chroma_format_idc;
- bool separate_colour_plane_flag;
- int bit_depth_luma_minus8;
- int bit_depth_chroma_minus8;
- bool qpprime_y_zero_transform_bypass_flag;
-
- bool seq_scaling_matrix_present_flag;
- int scaling_list4x4[6][kH264ScalingList4x4Length];
- int scaling_list8x8[6][kH264ScalingList8x8Length];
-
- int log2_max_frame_num_minus4;
- int pic_order_cnt_type;
- int log2_max_pic_order_cnt_lsb_minus4;
- bool delta_pic_order_always_zero_flag;
- int offset_for_non_ref_pic;
- int offset_for_top_to_bottom_field;
- int num_ref_frames_in_pic_order_cnt_cycle;
- int expected_delta_per_pic_order_cnt_cycle; // calculated
- int offset_for_ref_frame[255];
- int max_num_ref_frames;
- bool gaps_in_frame_num_value_allowed_flag;
- int pic_width_in_mbs_minus1;
- int pic_height_in_map_units_minus1;
- bool frame_mbs_only_flag;
- bool mb_adaptive_frame_field_flag;
- bool direct_8x8_inference_flag;
- bool frame_cropping_flag;
- int frame_crop_left_offset;
- int frame_crop_right_offset;
- int frame_crop_top_offset;
- int frame_crop_bottom_offset;
- bool vui_parameters_present_flag;
- int chroma_array_type;
-};
-
-struct CONTENT_EXPORT H264PPS {
- H264PPS();
-
- int pic_parameter_set_id;
- int seq_parameter_set_id;
- bool entropy_coding_mode_flag;
- bool bottom_field_pic_order_in_frame_present_flag;
- int num_slice_groups_minus1;
- // TODO(posciak): Slice groups not implemented, could be added at some point.
- int num_ref_idx_l0_default_active_minus1;
- int num_ref_idx_l1_default_active_minus1;
- bool weighted_pred_flag;
- int weighted_bipred_idc;
- int pic_init_qp_minus26;
- int pic_init_qs_minus26;
- int chroma_qp_index_offset;
- bool deblocking_filter_control_present_flag;
- bool constrained_intra_pred_flag;
- bool redundant_pic_cnt_present_flag;
- bool transform_8x8_mode_flag;
-
- bool pic_scaling_matrix_present_flag;
- int scaling_list4x4[6][kH264ScalingList4x4Length];
- int scaling_list8x8[6][kH264ScalingList8x8Length];
-
- int second_chroma_qp_index_offset;
-};
-
-struct CONTENT_EXPORT H264ModificationOfPicNum {
- int modification_of_pic_nums_idc;
- union {
- int abs_diff_pic_num_minus1;
- int long_term_pic_num;
- };
-};
-
-struct CONTENT_EXPORT H264WeightingFactors {
- bool luma_weight_flag;
- bool chroma_weight_flag;
- int luma_weight[32];
- int luma_offset[32];
- int chroma_weight[32][2];
- int chroma_offset[32][2];
-};
-
-struct CONTENT_EXPORT H264DecRefPicMarking {
- int memory_mgmnt_control_operation;
- int difference_of_pic_nums_minus1;
- int long_term_pic_num;
- int long_term_frame_idx;
- int max_long_term_frame_idx_plus1;
-};
-
-struct CONTENT_EXPORT H264SliceHeader {
- H264SliceHeader();
-
- enum {
- kRefListSize = 32,
- kRefListModSize = kRefListSize
- };
-
- enum Type {
- kPSlice = 0,
- kBSlice = 1,
- kISlice = 2,
- kSPSlice = 3,
- kSISlice = 4,
- };
-
- bool IsPSlice() const;
- bool IsBSlice() const;
- bool IsISlice() const;
- bool IsSPSlice() const;
- bool IsSISlice() const;
-
- bool idr_pic_flag; // from NAL header
- int nal_ref_idc; // from NAL header
- const uint8* nalu_data; // from NAL header
- off_t nalu_size; // from NAL header
- off_t header_bit_size; // calculated
-
- int first_mb_in_slice;
- int slice_type;
- int pic_parameter_set_id;
- int colour_plane_id; // TODO(posciak): use this! http://crbug.com/139878
- int frame_num;
- bool field_pic_flag;
- bool bottom_field_flag;
- int idr_pic_id;
- int pic_order_cnt_lsb;
- int delta_pic_order_cnt_bottom;
- int delta_pic_order_cnt[2];
- int redundant_pic_cnt;
- bool direct_spatial_mv_pred_flag;
-
- bool num_ref_idx_active_override_flag;
- int num_ref_idx_l0_active_minus1;
- int num_ref_idx_l1_active_minus1;
- bool ref_pic_list_modification_flag_l0;
- bool ref_pic_list_modification_flag_l1;
- H264ModificationOfPicNum ref_list_l0_modifications[kRefListModSize];
- H264ModificationOfPicNum ref_list_l1_modifications[kRefListModSize];
-
- int luma_log2_weight_denom;
- int chroma_log2_weight_denom;
-
- bool luma_weight_l0_flag;
- bool chroma_weight_l0_flag;
- H264WeightingFactors pred_weight_table_l0;
-
- bool luma_weight_l1_flag;
- bool chroma_weight_l1_flag;
- H264WeightingFactors pred_weight_table_l1;
-
- bool no_output_of_prior_pics_flag;
- bool long_term_reference_flag;
-
- bool adaptive_ref_pic_marking_mode_flag;
- H264DecRefPicMarking ref_pic_marking[kRefListSize];
-
- int cabac_init_idc;
- int slice_qp_delta;
- bool sp_for_switch_flag;
- int slice_qs_delta;
- int disable_deblocking_filter_idc;
- int slice_alpha_c0_offset_div2;
- int slice_beta_offset_div2;
-};
-
-struct H264SEIRecoveryPoint {
- int recovery_frame_cnt;
- bool exact_match_flag;
- bool broken_link_flag;
- int changing_slice_group_idc;
-};
-
-struct CONTENT_EXPORT H264SEIMessage {
- H264SEIMessage();
-
- enum Type {
- kSEIRecoveryPoint = 6,
- };
-
- int type;
- int payload_size;
- union {
- // Placeholder; in future more supported types will contribute to more
- // union members here.
- H264SEIRecoveryPoint recovery_point;
- };
-};
-
-// Class to parse an Annex-B H.264 stream,
-// as specified in chapters 7 and Annex B of the H.264 spec.
-class CONTENT_EXPORT H264Parser {
- public:
- enum Result {
- kOk,
- kInvalidStream, // error in stream
- kUnsupportedStream, // stream not supported by the parser
- kEOStream, // end of stream
- };
-
- H264Parser();
- ~H264Parser();
-
- void Reset();
- // Set current stream pointer to |stream| of |stream_size| in bytes,
- // |stream| owned by caller.
- void SetStream(const uint8* stream, off_t stream_size);
-
- // Read the stream to find the next NALU, identify it and return
- // that information in |*nalu|. This advances the stream to the beginning
- // of this NALU, but not past it, so subsequent calls to NALU-specific
- // parsing functions (ParseSPS, etc.) will parse this NALU.
- // If the caller wishes to skip the current NALU, it can call this function
- // again, instead of any NALU-type specific parse functions below.
- Result AdvanceToNextNALU(H264NALU* nalu);
-
- // NALU-specific parsing functions.
- // These should be called after AdvanceToNextNALU().
-
- // SPSes and PPSes are owned by the parser class and the memory for their
- // structures is managed here, not by the caller, as they are reused
- // across NALUs.
- //
- // Parse an SPS/PPS NALU and save their data in the parser, returning id
- // of the parsed structure in |*pps_id|/|*sps_id|.
- // To get a pointer to a given SPS/PPS structure, use GetSPS()/GetPPS(),
- // passing the returned |*sps_id|/|*pps_id| as parameter.
- // TODO(posciak,fischman): consider replacing returning Result from Parse*()
- // methods with a scoped_ptr and adding an AtEOS() function to check for EOS
- // if Parse*() return NULL.
- Result ParseSPS(int* sps_id);
- Result ParsePPS(int* pps_id);
-
- // Return a pointer to SPS/PPS with given |sps_id|/|pps_id| or NULL if not
- // present.
- const H264SPS* GetSPS(int sps_id);
- const H264PPS* GetPPS(int pps_id);
-
- // Slice headers and SEI messages are not used across NALUs by the parser
- // and can be discarded after current NALU, so the parser does not store
- // them, nor does it manage their memory.
- // The caller has to provide and manage it instead.
-
- // Parse a slice header, returning it in |*shdr|. |*nalu| must be set to
- // the NALU returned from AdvanceToNextNALU() and corresponding to |*shdr|.
- Result ParseSliceHeader(const H264NALU& nalu, H264SliceHeader* shdr);
-
- // Parse a SEI message, returning it in |*sei_msg|, provided and managed
- // by the caller.
- Result ParseSEI(H264SEIMessage* sei_msg);
-
- private:
- // Exp-Golomb code parsing as specified in chapter 9.1 of the spec.
- // Read one unsigned exp-Golomb code from the stream and return in |*val|.
- Result ReadUE(int* val);
-
- // Read one signed exp-Golomb code from the stream and return in |*val|.
- Result ReadSE(int* val);
-
- // Parse scaling lists (see spec).
- Result ParseScalingList(int size, int* scaling_list, bool* use_default);
- Result ParseSPSScalingLists(H264SPS* sps);
- Result ParsePPSScalingLists(const H264SPS& sps, H264PPS* pps);
-
- // Parse reference picture lists' modifications (see spec).
- Result ParseRefPicListModifications(H264SliceHeader* shdr);
- Result ParseRefPicListModification(int num_ref_idx_active_minus1,
- H264ModificationOfPicNum* ref_list_mods);
-
- // Parse prediction weight table (see spec).
- Result ParsePredWeightTable(const H264SPS& sps, H264SliceHeader* shdr);
-
- // Parse weighting factors (see spec).
- Result ParseWeightingFactors(int num_ref_idx_active_minus1,
- int chroma_array_type,
- int luma_log2_weight_denom,
- int chroma_log2_weight_denom,
- H264WeightingFactors* w_facts);
-
- // Parse decoded reference picture marking information (see spec).
- Result ParseDecRefPicMarking(H264SliceHeader *shdr);
-
- // Pointer to the current NALU in the stream.
- const uint8* stream_;
-
- // Bytes left in the stream after the current NALU.
- off_t bytes_left_;
-
- H264BitReader br_;
-
- // PPSes and SPSes stored for future reference.
- typedef std::map<int, H264SPS*> SPSById;
- typedef std::map<int, H264PPS*> PPSById;
- SPSById active_SPSes_;
- PPSById active_PPSes_;
-
- DISALLOW_COPY_AND_ASSIGN(H264Parser);
-};
-
-} // namespace content
-
-#endif // CONTENT_COMMON_GPU_MEDIA_H264_PARSER_H_
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-07 06:31:47 +0000