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|
/*****************************************************************
|
| AP4 - dac4 Atoms
|
| Copyright 2002-2018 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL is free software; you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation; either version 2, or (at your option)
| any later version.
|
| Bento4|GPL is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License
| along with Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
#ifndef _AP4_DEC4_ATOM_H_
#define _AP4_DEC4_ATOM_H_
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4Atom.h"
#include "Ap4Utils.h"
#include "Ap4Ac4Utils.h"
/*----------------------------------------------------------------------
| AP4_Dac4Atom
+---------------------------------------------------------------------*/
class AP4_Dac4Atom : public AP4_Atom
{
public:
AP4_IMPLEMENT_DYNAMIC_CAST_D(AP4_Dac4Atom, AP4_Atom)
// inner classes
struct Ac4Dsi {
struct Ac4BitrateDsi{
AP4_UI08 bit_rate_mode;
AP4_UI32 bit_rate;
AP4_UI32 bit_rate_precision;
// methods
AP4_Result WriteBitrateDsi(AP4_BitWriter &bits);
};
struct Ac4AlternativeInfo{
AP4_UI16 name_len;
AP4_UI08 presentation_name[256]; // restrict to 256 char
AP4_UI08 n_targets;
AP4_UI08 target_md_compat[32];
AP4_UI08 target_device_category[32];
// methods
AP4_Result WriteAlternativeInfo(AP4_BitWriter &bits);
};
struct SubStream{
AP4_UI08 b_4_back_channels_present;
AP4_UI08 b_centre_present;
AP4_UI08 top_channels_present;
AP4_UI08 b_lfe;
AP4_UI08 dsi_sf_multiplier;
AP4_UI08 b_substream_bitrate_indicator;
AP4_UI08 substream_bitrate_indicator;
AP4_UI08 ch_mode; // auxiliary information, used to calcuate pres_ch_mode
AP4_UI32 dsi_substream_channel_mask;
AP4_UI08 b_ajoc;
AP4_UI08 b_static_dmx;
AP4_UI08 n_dmx_objects_minus1;
AP4_UI08 n_umx_objects_minus1;
AP4_UI08 b_substream_contains_bed_objects;
AP4_UI08 b_substream_contains_dynamic_objects;
AP4_UI08 b_substream_contains_ISF_objects;
// methods
AP4_Result ParseSubstreamInfoChan(AP4_BitReader &bits,
unsigned int presentation_version,
unsigned char defalut_presentation_flag,
unsigned int fs_idx,
unsigned int &speaker_index_mask,
unsigned int frame_rate_factor,
unsigned int b_substreams_present,
unsigned char &dolby_atmos_indicator);
AP4_Result ParseSubStreamInfoAjoc(AP4_BitReader &bits,
unsigned int &channel_count,
unsigned char defalut_presentation_flag,
unsigned int fs_idx,
unsigned int frame_rate_factor,
unsigned int b_substreams_present);
AP4_Result ParseSubstreamInfoObj(AP4_BitReader &bits,
unsigned int &channel_count,
unsigned char defalut_presentation_flag,
unsigned int fs_idx,
unsigned int frame_rate_factor,
unsigned int b_substreams_present);
AP4_Result WriteSubstreamDsi (AP4_BitWriter &bits, unsigned char b_channel_coded);
AP4_Result GetChModeCore (unsigned char b_channel_coded);
private:
AP4_Result ParseChMode (AP4_BitReader &bits, int presentationVersion, unsigned char &dolby_atmos_indicator);
AP4_Result ParseDsiSfMutiplier (AP4_BitReader &bits, unsigned int fs_idx );
AP4_Result BedDynObjAssignment (AP4_BitReader &bits, unsigned int nSignals, bool is_upmix);
AP4_Result ParseSubstreamIdxInfo(AP4_BitReader &bits, unsigned int b_substreams_present);
AP4_Result ParseBitrateIndicator(AP4_BitReader &bits);
AP4_Result ParseOamdCommonData (AP4_BitReader &bits);
AP4_Result Trim (AP4_BitReader &bits);
AP4_Result BedRendeInfo (AP4_BitReader &bits);
AP4_UI32 ObjNumFromIsfConfig (unsigned char isf_config);
AP4_UI32 BedNumFromAssignCode (unsigned char assign_code);
AP4_UI32 BedNumFromNonStdMask (unsigned int non_std_mask);
AP4_UI32 BedNumFromStdMask (unsigned int std_mask);
};
struct SubStreamGroupV1 {
union {
struct
{
AP4_UI08 channel_mode;
AP4_UI08 dsi_sf_multiplier;
AP4_UI08 b_substream_bitrate_indicator;
AP4_UI08 substream_bitrate_indicator;
AP4_UI08 add_ch_base;
AP4_UI08 b_content_type;
AP4_UI08 content_classifier;
AP4_UI08 b_language_indicator;
AP4_UI08 n_language_tag_bytes;
AP4_UI08 language_tag_bytes[64];
}v0;
struct
{
AP4_UI08 b_substreams_present;
AP4_UI08 b_hsf_ext;
AP4_UI08 b_channel_coded;
AP4_UI08 n_substreams;
SubStream* substreams;
AP4_UI08 b_content_type;
AP4_UI08 content_classifier;
AP4_UI08 b_language_indicator;
AP4_UI08 n_language_tag_bytes;
AP4_UI08 language_tag_bytes[64]; // n_language_tag_bytes is 6 bits
AP4_UI08 dolby_atmos_indicator;
}v1;
}d;
AP4_Result ParseSubstreamGroupInfo(AP4_BitReader &bits,
unsigned int bitstream_version,
unsigned int presentation_version,
unsigned char defalut_presentation_flag,
unsigned int frame_rate_factor,
unsigned int fs_idx,
unsigned int &channel_count,
unsigned int &speaker_index_mask,
unsigned int &b_obj_or_Ajoc);
AP4_Result WriteSubstreamGroupDsi(AP4_BitWriter &bits);
private:
AP4_Result ParseOamdSubstreamInfo (AP4_BitReader &bits);
AP4_Result ParseHsfExtSubstreamInfo(AP4_BitReader &bits);
AP4_Result ParseContentType (AP4_BitReader &bits);
AP4_Result WriteContentType (AP4_BitWriter &bits);
};
struct PresentationV1 {
AP4_UI08 presentation_version;
union {
struct {
AP4_UI08 presentation_config;
AP4_UI08 mdcompat;
AP4_UI08 presentation_id;
AP4_UI08 dsi_frame_rate_multiply_info;
AP4_UI08 presentation_emdf_version;
AP4_UI16 presentation_key_id;
AP4_UI32 presentation_channel_mask;
// more fields omitted, v0 is deprecated.
} v0;
struct {
AP4_UI08 presentation_config_v1;
AP4_UI08 mdcompat;
AP4_UI08 b_presentation_id;
AP4_UI08 presentation_id;
AP4_UI08 dsi_frame_rate_multiply_info;
AP4_UI08 dsi_frame_rate_fraction_info;
AP4_UI08 presentation_emdf_version;
AP4_UI16 presentation_key_id;
AP4_UI08 b_presentation_channel_coded;
AP4_UI08 dsi_presentation_ch_mode;
AP4_UI08 pres_b_4_back_channels_present;
AP4_UI08 pres_top_channel_pairs;
AP4_UI32 presentation_channel_mask_v1;
AP4_UI08 b_presentation_core_differs;
AP4_UI08 b_presentation_core_channel_coded;
AP4_UI08 dsi_presentation_channel_mode_core;
AP4_UI08 b_presentation_filter;
AP4_UI08 b_enable_presentation;
AP4_UI08 n_filter_bytes;
AP4_UI08 b_multi_pid;
AP4_UI08 n_substream_groups;
SubStreamGroupV1* substream_groups;
AP4_UI32* substream_group_indexs; // auxiliary information, not exist in DSI
AP4_UI08 n_skip_bytes;
AP4_UI08 b_pre_virtualized;
AP4_UI08 b_add_emdf_substreams;
AP4_UI08 n_add_emdf_substreams;
AP4_UI08 substream_emdf_version[128]; // n_add_emdf_substreams - 7 bits
AP4_UI16 substream_key_id[128];
AP4_UI08 b_presentation_bitrate_info;
Ac4BitrateDsi ac4_bitrate_dsi;
AP4_UI08 b_alternative;
Ac4AlternativeInfo alternative_info;
AP4_UI08 de_indicator;
AP4_UI08 dolby_atmos_indicator;
AP4_UI08 b_extended_presentation_id;
AP4_UI16 extended_presentation_id;
} v1;
} d;
AP4_Result ParsePresentationV1Info(AP4_BitReader &bits,
unsigned int bitstream_version,
unsigned int frame_rate_idx,
unsigned int pres_idx,
unsigned int &max_group_index,
unsigned int **first_pres_sg_index,
unsigned int &first_pres_sg_num);
AP4_Result WritePresentationV1Dsi(AP4_BitWriter &bits);
private:
AP4_Result ParsePresentationVersion (AP4_BitReader &bits, unsigned int bitstream_version);
AP4_Result ParsePresentationConfigExtInfo(AP4_BitReader &bits, unsigned int bitstream_version);
AP4_UI32 ParseAc4SgiSpecifier (AP4_BitReader &bits, unsigned int bitstream_version) ;
AP4_Result ParseDSIFrameRateMultiplyInfo (AP4_BitReader &bits, unsigned int frame_rate_idx);
AP4_Result ParseDSIFrameRateFractionsInfo(AP4_BitReader &bits, unsigned int frame_rate_idx);
AP4_Result ParseEmdInfo (AP4_BitReader &bits, AP4_Ac4EmdfInfo &emdf_info);
AP4_Result ParsePresentationSubstreamInfo(AP4_BitReader &bits);
AP4_Result GetPresentationChMode();
AP4_Result GetPresentationChannelMask();
AP4_Result GetPresB4BackChannelsPresent();
AP4_Result GetPresTopChannelPairs();
AP4_Result GetBPresentationCoreDiffers();
};
AP4_UI08 ac4_dsi_version;
union {
struct {
AP4_UI08 bitstream_version;
AP4_UI08 fs_index;
AP4_UI32 fs;
AP4_UI08 frame_rate_index;
AP4_UI16 n_presentations;
// more fields from `ac4_dsi` are not included here, v0 is deprecated.
} v0;
struct {
AP4_UI08 bitstream_version;
AP4_UI08 fs_index;
AP4_UI32 fs;
AP4_UI08 frame_rate_index;
AP4_UI08 b_program_id;
AP4_UI16 short_program_id;
AP4_UI08 b_uuid;
AP4_UI08 program_uuid[16];
Ac4BitrateDsi ac4_bitrate_dsi;
AP4_UI16 n_presentations;
PresentationV1* presentations;
} v1;
} d;
};
// class methods
static AP4_Dac4Atom* Create(AP4_Size size, AP4_ByteStream& stream);
// constructors
AP4_Dac4Atom(AP4_UI32 size, const Ac4Dsi* ac4Dsi); // DSI vaiable initialize m_RawBytes (m_Dsi -> m_RawBytes)
// destructor
~AP4_Dac4Atom();
// methods
virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
virtual AP4_Result WriteFields(AP4_ByteStream& stream);
virtual AP4_Atom* Clone() { return new AP4_Dac4Atom(m_Size32, m_RawBytes.GetData()); }
virtual AP4_Dac4Atom* CloneConst() const { return new AP4_Dac4Atom(m_Size32, m_RawBytes.GetData()); }
// accessors
const AP4_DataBuffer& GetRawBytes() const { return m_RawBytes; }
const Ac4Dsi& GetDsi() const { return m_Dsi; }
// helpers
void GetCodecString(AP4_String& codec);
private:
// methods
AP4_Dac4Atom(const AP4_Dac4Atom& other);
AP4_Dac4Atom(AP4_UI32 size, const AP4_UI08* payload); // box data initialize m_Dsi (m_RawBytes -> m_Dsi)
// members
AP4_DataBuffer m_RawBytes;
Ac4Dsi m_Dsi;
};
#endif // _AP4_DAC4_ATOM_H_
|
