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mpegdescriptors.h
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/
mpegdescriptors.h
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// -*- Mode: c++ -*-
// Copyright (c) 2003-2004, Daniel Thor Kristjansson
#ifndef _MPEG_DESCRIPTORS_H_
#define _MPEG_DESCRIPTORS_H_
// C++ headers
#include <vector>
using namespace std;
// Qt headers
#include <QMutex>
#include <QString>
// MythTV
#include "iso639.h"
#include "mythtvexp.h"
typedef vector<const unsigned char*> desc_list_t;
class DescriptorID
{
public:
enum
{
// MPEG
video = 0x02,
audio = 0x03,
hierarchy = 0x04,
registration = 0x05, /* implemented */
data_stream_alignment = 0x06,
target_background_grid = 0x07,
video_window = 0x08,
conditional_access = 0x09, /* implemented */
iso_639_language = 0x0A, /* implemented */
system_clock = 0x0B,
multiplex_buffer_utilization= 0x0C,
copyright = 0x0D,
maximum_bitrate = 0x0E,
private_data_indicator = 0x0F,
smoothing_buffer = 0x10,
std = 0x11,
ibp = 0x12,
carousel_identifier = 0x13,
association_tag = 0x14,
deferred_association_tag = 0x15,
/* RESERVED = 0x16, */
npt_reference = 0x17,
npt_endpoint = 0x18,
stream_mode = 0x19,
stream_event = 0x1A,
mpeg4_video = 0x1B,
mpeg4_audio = 0x1C,
iod = 0x1D,
sl = 0x1E,
fmc = 0x1F,
external_es_id = 0x20,
mux_code = 0x21,
fmx_buffer_size = 0x22,
multiplex_buffer = 0x23,
content_labeling = 0x24,
metadata_pointer = 0x25,
metadata = 0x26,
metadata_std = 0x27,
avc_video = 0x28, /* implemented */
ipmp = 0x29,
avc_timing_and_hrd = 0x2A, /* partial */
mpeg2_aac_audio = 0x2B,
flex_mux_timing = 0x2C,
// DVB
network_name = 0x40, /* implemented */
service_list = 0x41, /* implemented */
dvb_stuffing = 0x42, /* implemented */
satellite_delivery_system = 0x43, /* implemented */
cable_delivery_system = 0x44, /* implemented */
vbi_data = 0x45, /* partial */
vbi_teletext = 0x46, /* partial */
bouquet_name = 0x47, /* implemented */
service = 0x48, /* implemented, toString lacking */
country_availability = 0x49, /* implemented */
linkage = 0x4A, /* partial */
nvod_reference = 0x4B, /* partial */
dvb_time_shifted_service = 0x4C, /* partial */
short_event = 0x4D, /* implemented */
extended_event = 0x4E, /* implemented */
time_shifted_event = 0x4F, /* partial */
component = 0x50, /* implemented, toString lacking */
mosaic = 0x51, /* partial */
stream_identifier = 0x52, /* implemented */
ca_identifier = 0x53, /* partial */
content = 0x54, /* implemented */
parental_rating = 0x55, /* partial */
teletext = 0x56, /* partial */
telephone = 0x57, /* partial */
local_time_offset = 0x58,
subtitling = 0x59, /* partial */
terrestrial_delivery_system = 0x5A, /* implemented */
multilingual_network_name = 0x5B, /* partial */
multilingual_bouquet_name = 0x5C, /* partial */
multilingual_service_name = 0x5D, /* partial */
multilingual_component = 0x5E,
private_data_specifier = 0x5F, /* partial */
service_move = 0x60, /* partial */
short_smoothing_buffer = 0x61, /* partial */
frequency_list = 0x62, /* implemented */
partial_transport_stream = 0x63, /* partial */
data_broadcast = 0x64, /* partial */
scrambling = 0x65, /* partial */
data_broadcast_id = 0x66, /* partial */
transport_stream = 0x67, /* partial */
dsng = 0x68, /* partial */
pdc = 0x69, /* partial */
ac3 = 0x6A, /* partial */
ancillary_data = 0x6B, /* partial */
cell_list = 0x6C, /* partial */
cell_frequency_link = 0x6D, /* partial */
announcement_support = 0x6E, /* partial */
application_signalling = 0x6F,
adaptation_field_data = 0x70, /* partial */
service_identifier = 0x71,
service_availability = 0x72, /* partial */
default_authority = 0x73, /* implemented */
related_content = 0x74,
tva_id = 0x75,
dvb_content_identifier = 0x76, /* partial */
time_slice_fec_identifier = 0x77,
ecm_repetition_rate = 0x78,
s2_delivery_system = 0x79,
eac3 = 0x7A,
dts = 0x7B,
aac = 0x7C,
// ATSC
atsc_stuffing = 0x80,
ac3_audio_stream = 0x81, /* partial */
atsc_program_identifier = 0x85,
caption_service = 0x86, /* implemented */
content_advisory = 0x87,
atsc_ca_descriptor = 0x88,
atsc_descriptor_tag = 0x89,
// SCTE
scte_frame_rate = 0x82, /* implemented, also ATSC */
scte_extended_video = 0x83, /* implemented, also ATSC */
scte_component_name = 0x84, /* implemented, also ATSC */
scte_cue_identifier = 0x8A, /* implemented */
scte_frequency_spec = 0x90, /* implemented */
scte_modulation_params = 0x91, /* implemented */
scte_transport_stream_id = 0x92, /* implemented */
scte_revision_detection = 0x93, /* implemented */
// ATSC
extended_channel_name = 0xA0, /* implemented */
service_location = 0xA1,
atsc_time_shifted_service = 0xA2,
component_name = 0xA3, /* implemented */
atsc_data_service = 0xA4,
atsc_pid_count = 0xA5,
atsc_download = 0xA6,
multiprotocol_encapsulation = 0xA7,
dcc_departing_request = 0xA8,
dcc_arriving_request = 0xA9,
drm_control = 0xAA,
atsc_genre = 0xAB,
atsc_private_information = 0xAD,
atsc_content_identifier = 0xB6, /* partial */
};
};
class PrivateDescriptorID
{
public:
enum
{
// These can conflict and should only be used
// on these specific networks.
// Private -- UK
dvb_uk_channel_list = 0x83, /* implemented */
// Private -- Dish Network
dish_event_rights = 0x87,
dish_event_mpaa = 0x89, /* implemented */
dish_event_name = 0x91, /* implemented */
dish_event_description = 0x92, /* implemented */
dish_event_properties = 0x94, /* implemented */
dish_event_vchip = 0x95, /* implemented */
dish_event_tags = 0x96, /* implemented */
// Private -- premiere.de
premiere_content_order = 0xF0,
premiere_parental_information = 0xF1,
premiere_content_transmission = 0xF2,
};
};
class MTV_PUBLIC MPEGDescriptor
{
public:
operator const unsigned char*() const { return _data; }
MPEGDescriptor(const unsigned char *data, int len = 300) : _data(data)
{
if ((len < 2) || (int(DescriptorLength()) + 2) > len)
_data = NULL;
}
MPEGDescriptor(const unsigned char *data,
int len, uint tag) : _data(data)
{
if ((len < 2) || (int(DescriptorLength()) + 2) > len)
_data = NULL;
else if (DescriptorTag() != tag)
_data = NULL;
}
MPEGDescriptor(const unsigned char *data,
int len, uint tag, uint req_desc_len) : _data(data)
{
if ((len < 2) || (int(DescriptorLength()) + 2) > len)
_data = NULL;
else if (DescriptorTag() != tag)
_data = NULL;
else if (DescriptorLength() != req_desc_len)
_data = NULL;
}
virtual ~MPEGDescriptor() {}
bool IsValid(void) const { return _data; }
uint size(void) const { return DescriptorLength() + 2; }
uint DescriptorTag(void) const { return _data[0]; }
QString DescriptorTagString(void) const;
uint DescriptorLength(void) const { return _data[1]; }
virtual QString toString(void) const;
virtual QString toStringXML(uint indent_level) const;
static desc_list_t Parse(const unsigned char *data, uint len);
static desc_list_t ParseAndExclude(const unsigned char *data, uint len,
int descriptorid);
static desc_list_t ParseOnlyInclude(const unsigned char *data, uint len,
int descriptorid);
static const unsigned char *Find(const desc_list_t &parsed, uint desc_tag);
static desc_list_t FindAll(const desc_list_t &parsed, uint desc_tag);
static const unsigned char *FindBestMatch(
const desc_list_t &parsed, uint desc_tag, QMap<uint,uint> &langPref);
static desc_list_t FindBestMatches(
const desc_list_t &parsed, uint desc_tag, QMap<uint,uint> &langPref);
protected:
const unsigned char *_data;
};
// a_52a.pdf p119, Table A1
class RegistrationDescriptor : public MPEGDescriptor
{
public:
RegistrationDescriptor(const unsigned char *data, int len = 300) :
MPEGDescriptor(data, len, DescriptorID::registration)
{
// The HD-PVR outputs a registration descriptor with a length
// of 8 rather than 4, so we accept any length >= 4, not just 4.
if (DescriptorLength() < 4)
_data = NULL;
}
uint FormatIdentifier(void) const
{ return (_data[2]<<24) | (_data[3]<<16) | (_data[4]<<8) | _data[5]; }
QString FormatIdentifierString(void) const
{
return QString("") + QChar(_data[2]) + QChar(_data[3]) +
QChar(_data[4]) + QChar(_data[5]);
}
QString toString() const;
private:
static void InitializeDescriptionMap(void);
static QString GetDescription(const QString &fmt);
private:
static QMutex description_map_lock;
static bool description_map_initialized;
static QMap<QString,QString> description_map;
};
class ConditionalAccessDescriptor : public MPEGDescriptor
{
public:
ConditionalAccessDescriptor(const unsigned char *data, int len = 300) :
MPEGDescriptor(data, len, DescriptorID::conditional_access) { }
uint SystemID(void) const { return _data[2] << 8 | _data[3]; }
uint PID(void) const { return (_data[4] & 0x1F) << 8 | _data[5]; }
uint DataSize(void) const { return DescriptorLength() - 4; }
const unsigned char *Data(void) const { return _data+6; }
QString toString() const;
};
class ISO639LanguageDescriptor : public MPEGDescriptor
{
public:
ISO639LanguageDescriptor(const unsigned char *data, int len = 300) :
MPEGDescriptor(data, len, DescriptorID::iso_639_language) { }
const unsigned char* CodeRaw() const { return &_data[2]; }
uint AudioType() const { return _data[5]; }
int LanguageKey(void) const
{ return iso639_str3_to_key(&_data[2]); }
QString LanguageString(void) const
{ return iso639_key_to_str3(LanguageKey()); }
int CanonicalLanguageKey(void) const
{ return iso639_key_to_canonical_key(LanguageKey()); }
QString CanonicalLanguageString(void) const
{ return iso639_key_to_str3(CanonicalLanguageKey()); }
QString toString() const;
};
/// ISO 13818-1:2000/Amd.3:2004 page 11
class AVCVideoDescriptor : public MPEGDescriptor
{
public:
AVCVideoDescriptor(const unsigned char *data, int len = 300) :
MPEGDescriptor(data, len, DescriptorID::avc_video) { }
// Name bits loc expected value
// descriptor_tag 8 0.0 0x
// descriptor_length 8 1.0
// profile_idc 8 2.0
uint ProfileIDC(void) const { return _data[2]; }
// constraint_set0_flag 1 3.0
bool ConstaintSet0(void) const { return _data[3]&0x80; }
// constraint_set1_flag 1 3.1
bool ConstaintSet1(void) const { return _data[3]&0x40; }
// constraint_set2_flag 1 3.2
bool ConstaintSet2(void) const { return _data[3]&0x20; }
// AVC_compatible_flags 5 3.3
uint AVCCompatible(void) const { return _data[3]&0x1f; }
// level_idc 8 4.0
uint LevelIDC(void) const { return _data[4]; }
// AVC_still_present 1 5.0
bool AVCStill(void) const { return _data[5]&0x80; }
// AVC_24_hour_picture_flag 1 5.1
bool AVC24HourPicture(void) const { return _data[5]&0x40; }
bool FramePackingSEINotPresentFlag(void)
const { return _data[5]&0x20; }
// reserved 6 bslbf
QString toString() const;
};
/// ISO 13818-1:2000/Amd.3:2004 page 12
class AVCTimingAndHRDDescriptor : public MPEGDescriptor
{
AVCTimingAndHRDDescriptor(const unsigned char *data, int len = 300) :
MPEGDescriptor(data, len, DescriptorID::avc_timing_and_hrd) { }
// Name bits loc expected value
// descriptor_tag 8 0.0 0x
// descriptor_length 8 1.0
// hrd_management_valid 1 2.0
bool HRDManagementValid(void) const { return _data[2]&0x80; }
// reserved 6 2.1
// picture_and_timing_info_present 1 2.7
bool HasPictureAndTimingInfo(void) const { return _data[2]&0x01;}
// if (picture_and_timing_info_present) {
// 90kHz_flag 1 3.0
// reserved 7 3.1
// if (90kHz_flag == '0') {
// N 32 4.0 uimsbf
// K 32 8.0 uimsbf
// }
// num_units_in_tick 32 (90khz)?4.0:12.0 uimsbf
// }
// fixed_frame_rate_flag 1 (pict_info)?((90khz)?8.0:16.0):3.0
// temporal_poc_flag 1 (pict_info)?((90khz)?8.1:16.1):3.1
// picture_to_display_conversion_flag 1 (pict_info)?((90khz)?8.2:16.2):3.2
// reserved 5 bslbf
};
#endif // _MPEG_DESCRIPTORS_H_