/* 
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * The Original Code is Fluendo MPEG Demuxer plugin.
 *
 * The Initial Developer of the Original Code is Fluendo, S.L.
 * Portions created by Fluendo, S.L. are Copyright (C) 2005
 * Fluendo, S.L. All Rights Reserved.
 *
 * Contributor(s): Wim Taymans <wim@fluendo.com>
 *
 */

#ifndef __GST_MPEG_DESC_H__
#define __GST_MPEG_DESC_H__

#include <glib.h>

/*
 * descriptor_tag TS  PS                      Identification
 *        0       n/a n/a Reserved
 *        1       n/a n/a Reserved
 *        2        X   X  video_stream_descriptor
 *        3        X   X  audio_stream_descriptor
 *        4        X   X  hierarchy_descriptor
 *        5        X   X  registration_descriptor
 *        6        X   X  data_stream_alignment_descriptor
 *        7        X   X  target_background_grid_descriptor
 *        8        X   X  video_window_descriptor
 *        9        X   X  CA_descriptor
 *       10        X   X  ISO_639_language_descriptor
 *       11        X   X  system_clock_descriptor
 *       12        X   X  multiplex_buffer_utilization_descriptor
 *       13        X   X  copyright_descriptor
 *       14        X      maximum bitrate descriptor
 *       15        X   X  private data indicator descriptor
 *       16        X   X  smoothing buffer descriptor
 *       17        X      STD_descriptor
 *       18        X   X  IBP descriptor
 *      19-63     n/a n/a ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Reserved
 *     64-255     n/a n/a User Private
 */
#define DESC_VIDEO_STREAM                     0x02
#define DESC_AUDIO_STREAM                     0x03
#define DESC_HIERARCHY                        0x04
#define DESC_REGISTRATION                     0x05
#define DESC_DATA_STREAM_ALIGNMENT            0x06
#define DESC_TARGET_BACKGROUND_GRID           0x07
#define DESC_VIDEO_WINDOW                     0x08
#define DESC_CA                               0x09
#define DESC_ISO_639_LANGUAGE                 0x0A
#define DESC_SYSTEM_CLOCK                     0x0B
#define DESC_MULTIPLEX_BUFFER_UTILISATION     0x0C
#define DESC_COPYRIGHT                        0x0D
#define DESC_MAXIMUM_BITRATE                  0x0E
#define DESC_PRIVATE_DATA_INDICATOR           0x0F
#define DESC_SMOOTHING_BUFFER                 0x10
#define DESC_STD                              0x11
#define DESC_IBP                              0x12

#define DESC_DIRAC_TC_PRIVATE                 0xAC

/* DVB tags */
#define DESC_DVB_CAROUSEL_IDENTIFIER          0x13
#define DESC_DVB_NETWORK_NAME                 0x40
#define DESC_DVB_SERVICE_LIST                 0x41
#define DESC_DVB_STUFFING                     0x42
#define DESC_DVB_SATELLITE_DELIVERY_SYSTEM    0x43
#define DESC_DVB_CABLE_DELIVERY_SYSTEM        0x44
#define DESC_DVB_VBI_DATA                     0x45
#define DESC_DVB_VBI_TELETEXT                 0x46
#define DESC_DVB_BOUQUET_NAME                 0x47
#define DESC_DVB_SERVICE                      0x48
#define DESC_DVB_COUNTRY_AVAILABILITY         0x49
#define DESC_DVB_LINKAGE                      0x4A
#define DESC_DVB_NVOD_REFERENCE               0x4B
#define DESC_DVB_TIME_SHIFTED_SERVICE         0x4C
#define DESC_DVB_SHORT_EVENT                  0x4D
#define DESC_DVB_EXTENDED_EVENT               0x4E
#define DESC_DVB_TIME_SHIFTED_EVENT           0x4F
#define DESC_DVB_COMPONENT                    0x50
#define DESC_DVB_MOSAIC                       0x51
#define DESC_DVB_STREAM_IDENTIFIER            0x52
#define DESC_DVB_CA_IDENTIFIER                0x53
#define DESC_DVB_CONTENT                      0x54
#define DESC_DVB_PARENTAL_RATING              0x55
#define DESC_DVB_TELETEXT                     0x56
#define DESC_DVB_TELEPHONE                    0x57
#define DESC_DVB_LOCAL_TIME_OFFSET            0x58
#define DESC_DVB_SUBTITLING                   0x59
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM  0x5A
#define DESC_DVB_MULTILINGUAL_NETWORK_NAME    0x5B
#define DESC_DVB_MULTILINGUAL_BOUQUET_NAME    0x5C
#define DESC_DVB_MULTILINGUAL_SERVICE_NAME    0x5D
#define DESC_DVB_MULTILINGUAL_COMPONENT       0x5E
#define DESC_DVB_PRIVATE_DATA                 0x5F
#define DESC_DVB_SERVICE_MOVE                 0x60
#define DESC_DVB_SHORT_SMOOTHING_BUFFER       0x61
#define DESC_DVB_FREQUENCY_LIST               0x62
#define DESC_DVB_PARTIAL_TRANSPORT_STREAM     0x63
#define DESC_DVB_DATA_BROADCAST               0x64
#define DESC_DVB_SCRAMBLING                   0x65
#define DESC_DVB_DATA_BROADCAST_ID            0x66
#define DESC_DVB_TRANSPORT_STREAM             0x67
#define DESC_DVB_DSNG                         0x68
#define DESC_DVB_PDC                          0x69
#define DESC_DVB_AC3                          0x6A
#define DESC_DVB_ANCILLARY_DATA               0x6B
#define DESC_DVB_CELL_LIST                    0x6C
#define DESC_DVB_CELL_FREQUENCY_LINK          0x6D
#define DESC_DVB_ANNOUNCEMENT_SUPPORT         0x6E
#define DESC_DVB_APPLICATION_SIGNALLING       0x6F
#define DESC_DVB_ADAPTATION_FIELD_DATA        0x70
#define DESC_DVB_SERVICE_IDENTIFIER           0x71
#define DESC_DVB_SERVICE_AVAILABILITY         0x72
#define DESC_DVB_DEFAULT_AUTHORITY            0x73
#define DESC_DVB_RELATED_CONTENT              0x74
#define DESC_DVB_TVA_ID                       0x75
#define DESC_DVB_CONTENT_IDENTIFIER           0x76
#define DESC_DVB_TIMESLICE_FEC_IDENTIFIER     0x77
#define DESC_DVB_ECM_REPETITION_RATE          0x78
#define DESC_DVB_S2_SATELLITE_DELIVERY_SYSTEM 0x79
#define DESC_DVB_ENHANCED_AC3                 0x7A
#define DESC_DVB_DTS                          0x7B
#define DESC_DVB_AAC                          0x7C
/* 0x7D and 0x7E are reserved for future use */
#define DESC_DVB_EXTENSION                    0x7F
/* 0x80 - 0xFE are user defined */
#define DESC_AC3_AUDIO_STREAM                 0x81
#define DESC_DTG_LOGICAL_CHANNEL              0x83    /* from DTG D-Book */
/* 0xFF is forbidden */

/* common for all descriptors */
#define DESC_TAG(desc) 		(desc[0])
#define DESC_LENGTH(desc) 	(desc[1])

/* video_stream_descriptor */
#define DESC_VIDEO_STREAM_multiple_framerate_flag(desc) 	(((desc)[2] & 0x80) == 0x80)
#define DESC_VIDEO_STREAM_frame_rate_code(desc) 		(((desc)[2] & 0x38) >> 3)
#define DESC_VIDEO_STREAM_MPEG_1_only_flag(desc) 		(((desc)[2] & 0x04) == 0x04)
#define DESC_VIDEO_STREAM_constrained_parameter_flag(desc) 	(((desc)[2] & 0x02) == 0x02)
#define DESC_VIDEO_STREAM_still_picture_flag(desc) 	 	(((desc)[2] & 0x01) == 0x01)
/* if (MPEG_1_only_flag == 1) */
#define DESC_VIDEO_STREAM_profile_and_level_indication(desc)	((desc)[3])
#define DESC_VIDEO_STREAM_chroma_format(desc)			(((desc)[4] & 0xc0) >> 6)
#define DESC_VIDEO_STREAM_frame_rate_extension_flag(desc)	(((desc)[4] & 0x20) == 0x20)

/* audio_stream_descriptor */
#define DESC_AUDIO_STREAM_free_format_flag(desc) 		(((desc)[2] & 0x80) == 0x80)
#define DESC_AUDIO_STREAM_ID(desc) 				(((desc)[2] & 0x40) == 0x40)
#define DESC_AUDIO_STREAM_layer(desc) 				(((desc)[2] & 0x30) >> 4)
#define DESC_AUDIO_STREAM_variable_rate_audio_indicator(desc) 	(((desc)[2] & 0x08) == 0x08)

/* hierarchy_descriptor */
#define DESC_HIERARCHY_hierarchy_type(desc)			(((desc)[2] & 0x0f))
#define DESC_HIERARCHY_hierarchy_layer_index(desc)		(((desc)[3] & 0x3f))
#define DESC_HIERARCHY_hierarchy_embedded_layer_index(desc)	(((desc)[4] & 0x3f))
#define DESC_HIERARCHY_hierarchy_channel(desc)			(((desc)[5] & 0x3f))

/* registration_descriptor */
#define DESC_REGISTRATION_format_identifier(desc)		(GST_READ_UINT32_BE ((desc)+2))
#define DESC_REGISTRATION_additional_ident_info_len(desc)	((desc)[1] - 4)
#define DESC_REGISTRATION_additional_ident_info(desc)		(&(desc)[6])

/* data_stream_alignment_descriptor */
#define DESC_DATA_STREAM_ALIGNMENT_alignment_type(desc)		((desc)[2])

/* target_background_grid_descriptor */
#define DESC_TARGET_BACKGROUND_GRID_horizontal_size(desc)	(GST_READ_UINT16_BE ((desc)+2) >> 2)
#define DESC_TARGET_BACKGROUND_GRID_vertical_size(desc)		((GST_READ_UINT32_BE ((desc)+2) & 0x0003fff0) >> 4)
#define DESC_TARGET_BACKGROUND_GRID_aspect_ratio_information(desc) ((desc)[5] & 0x0f)

/* video_window_descriptor */
#define DESC_VIDEO_WINDOW_horizontal_offset(desc)		(GST_READ_UINT16_BE ((desc)+2) >> 2)
#define DESC_VIDEO_WINDOW_vertical_offset(desc)			((GST_READ_UINT32_BE ((desc)+2) & 0x0003fff0) >> 4)
#define DESC_VIDEO_WINDOW_window_priority(desc)	 		((desc)[5] & 0x0f)

/* CA_descriptor */
#define DESC_CA_system_ID(desc)					(GST_READ_UINT16_BE ((desc)+2))
#define DESC_CA_PID(desc)					(GST_READ_UINT16_BE ((desc)+2) & 0x1fff)

/* ISO_639_language_descriptor */
#define DESC_ISO_639_LANGUAGE_codes_n(desc)			((desc[1]) >> 2)
#define DESC_ISO_639_LANGUAGE_language_code_nth(desc,i)		(&(desc[2 + (4*i)]))
#define DESC_ISO_639_LANGUAGE_audio_type_nth(desc,i)		((desc)[5 + (4*i)])

/* system_clock_descriptor */
#define DESC_SYSTEM_CLOCK_external_clock_reference_indicator(desc) (((desc)[2] & 0x80) == 0x80)
#define DESC_SYSTEM_CLOCK_clock_accuracy_integer(desc)		((desc)[2] & 0x3f)
#define DESC_SYSTEM_CLOCK_clock_accuracy_exponent(desc)		(((desc)[3] & 0xe0) >> 5)

/* multiplex_buffer_utilization_descriptor */
#define DESC_MULTIPLEX_BUFFER_UTILISATION_bound_valid_flag(desc)	(((desc)[2] & 0x80) == 0x80)
#define DESC_MULTIPLEX_BUFFER_UTILISATION_LTW_offset_lower_bound(desc)	(GST_READ_UINT16_BE ((desc)+2) & 0x7fff)
#define DESC_MULTIPLEX_BUFFER_UTILISATION_LTW_offset_upper_bound(desc)	(GST_READ_UINT16_BE ((desc)+4) & 0x7fff)

/* copyright_descriptor */
#define DESC_COPYRIGHT_copyright_identifier(desc)		(GST_READ_UINT32_BE ((desc)+2))
#define DESC_COPYRIGHT_additional_copyright_info_len(desc)	((desc)[1] - 4)
#define DESC_COPYRIGHT_additional_copyright_info(desc)		(&(desc)[6])

/* maximum_bitrate_descriptor */
#define DESC_MAXIMUM_BITRAT_maximum_bitrate(desc)		(((((guint32)desc[2]) & 0x3f) << 16) | \
								 GST_READ_UINT16_BE ((desc)+3))

/* private_data_indicator_descriptor */
#define DESC_PRIVATE_DATA_INDICATOR_indicator(desc)		(GST_READ_UINT32_BE(&desc[2]))

/* smoothing_buffer_descriptor */
#define DESC_SMOOTHING_BUFFER_sb_leak_rate(desc)		(((((guint32)desc[2]) & 0x3f) << 16) | \
                                                                 GST_READ_UINT16_BE ((desc)+3))
#define DESC_SMOOTHING_BUFFER_sb_size(desc)			(((((guint32)desc[5]) & 0x3f) << 16) | \
                                                                 GST_READ_UINT16_BE ((desc)+6))
/* STD_descriptor */
#define DESC_STD_leak_valid_flag(desc)				(((desc)[2] & 0x01) == 0x01)

/* ibp_descriptor */
#define DESC_IBP_closed_gop_flag(desc)				(((desc)[2] & 0x80) == 0x80)
#define DESC_IBP_identical_gop_flag(desc)			(((desc)[2] & 0x40) == 0x40)
#define DESC_IBP_max_gop_length(desc)				(GST_READ_UINT16_BE ((desc)+6) & 0x3fff)

/* time_code descriptor */
#define DESC_TIMECODE_video_pid(desc)                           (GST_READ_UINT16_BE ((desc) + 2) & 0x1fff)

/* Stream identifier descriptor */
#define DESC_DVB_STREAM_IDENTIFIER_component_tag(desc)  (desc[2])

/* DVB Network Name descriptor */
#define DESC_DVB_NETWORK_NAME_length(desc)  (GST_READ_UINT8((desc)+1))
#define DESC_DVB_NETWORK_NAME_text(desc)    (desc+2)

/* DVB Service Descriptor */
#define DESC_DVB_SERVICE_type(desc) (desc[2])
#define DESC_DVB_SERVICE_provider_name_length(desc) (desc[3])
#define DESC_DVB_SERVICE_provider_name_text(desc)   (desc+4)
#define DESC_DVB_SERVICE_name_length(desc)  (desc[4 + DESC_DVB_SERVICE_provider_name_length(desc)])
#define DESC_DVB_SERVICE_name_text(desc)    (desc + 5 + DESC_DVB_SERVICE_provider_name_length(desc))

/* DVB Component Descriptor */
#define DESC_DVB_COMPONENT_stream_content(desc) (desc[2] & 0x0F)
#define DESC_DVB_COMPONENT_type(desc)   (desc[3])
#define DESC_DVB_COMPONENT_tag(desc)    (desc[4])
#define DESC_DVB_COMPONENT_language(desc)   (desc + 5)

/* DVB Bouquet Name Descriptor */
#define DESC_DVB_BOUQUET_NAME_text(desc)    (desc + 2)

/* DVB Short Event Descriptor */
#define DESC_DVB_SHORT_EVENT_name_text(desc)	(desc + 6)
#define DESC_DVB_SHORT_EVENT_name_length(desc)	(desc[5])
#define DESC_DVB_SHORT_EVENT_description_text(desc) (desc + 6 + DESC_DVB_SHORT_EVENT_name_length(desc) + 1)
#define DESC_DVB_SHORT_EVENT_description_length(desc)	(desc[6 + DESC_DVB_SHORT_EVENT_name_length(desc)])

/* DVB Extended Event Descriptor */
#define DESC_DVB_EXTENDED_EVENT_descriptor_number(desc) ((desc[2] & 0xF0) >> 4)
#define DESC_DVB_EXTENDED_EVENT_last_descriptor_number(desc) (desc[2] & 0x0F)
#define DESC_DVB_EXTENDED_EVENT_iso639_language_code(desc) (desc + 3)
#define DESC_DVB_EXTENDED_EVENT_items_length(desc) (desc[6])
#define DESC_DVB_EXTENDED_EVENT_items(desc) (desc + 7)
#define DESC_DVB_EXTENDED_EVENT_text_length(desc) (desc[7 + DESC_DVB_EXTENDED_EVENT_items_length(desc)])
#define DESC_DVB_EXTENDED_EVENT_text(desc) (desc + 7 + DESC_DVB_EXTENDED_EVENT_items_length(desc) + 1)

/* DVB Satellite Delivery System Descriptor */
#define DESC_DVB_SATELLITE_DELIVERY_SYSTEM_frequency(desc)	(desc + 2)
#define DESC_DVB_SATELLITE_DELIVERY_SYSTEM_orbital_position(desc)	(desc + 6)
#define DESC_DVB_SATELLITE_DELIVERY_SYSTEM_west_east_flag(desc)	((desc[8] & 0x80) == 0x80)
#define DESC_DVB_SATELLITE_DELIVERY_SYSTEM_polarization(desc)	((desc[8] >> 5) & 0x3)
#define DESC_DVB_SATELLITE_DELIVERY_SYSTEM_modulation(desc)	(desc[8] & 0x1F)
#define DESC_DVB_SATELLITE_DELIVERY_SYSTEM_symbol_rate(desc)	(desc + 9)
#define DESC_DVB_SATELLITE_DELIVERY_SYSTEM_fec_inner(desc)	(desc[12] & 0x0F)

/* DVB Terrestrial Delivery System Descriptor */
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_frequency(desc)	(GST_READ_UINT32_BE((desc) + 2))
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_bandwidth(desc)	((desc[6] >> 5) & 0x7)
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_constellation(desc)	((desc[7] >> 6) & 0x3)
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_hierarchy(desc)	((desc[7] >> 3) & 0x7)
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_code_rate_hp(desc)	(desc[7] & 0x7)
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_code_rate_lp(desc)	((desc[8] >> 5) & 0x7)
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_guard_interval(desc)	((desc[8] >> 3) & 0x3)
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_transmission_mode(desc)	((desc[8] >> 1) & 0x3)
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_other_frequency(desc)	((desc[8] & 0x01) == 0x01)

/* DVB Cable Delivery System Descriptor */
#define DESC_DVB_CABLE_DELIVERY_SYSTEM_frequency(desc)		(desc + 2)
#define DESC_DVB_CABLE_DELIVERY_SYSTEM_fec_outer(desc)		(desc[7] & 0x0F)
#define DESC_DVB_CABLE_DELIVERY_SYSTEM_modulation(desc)		(desc[8])
#define DESC_DVB_CABLE_DELIVERY_SYSTEM_symbol_rate(desc)	(desc + 9)
#define DESC_DVB_CABLE_DELIVERY_SYSTEM_fec_inner(desc)		(desc[12] & 0x0F)

/* DVB Data Broadcast Descriptor */
#define DESC_DVB_DATA_BROADCAST_data_broadcast_id(desc)		(GST_READ_UINT16_BE((desc) + 2))
#define DESC_DVB_DATA_BROADCAST_component_tag(desc)		(desc[4])
#define DESC_DVB_DATA_BROADCAST_selector_length(desc)		(desc[5])
#define DESC_DVB_DATA_BROADCAST_selector(desc)			(desc + 6)
#define DESC_DVB_DATA_BROADCAST_iso639_language_code(desc)	(desc + 6 + DESC_DVB_DATA_BROADCAST_selector_length(desc))
#define DESC_DVB_DATA_BROADCAST_text_length(desc)		(desc + 9 + DESC_DVB_DATA_BROADCAST_selector_length(desc))
#define DESC_DVB_DATA_BROADCAST_text(desc)			(desc + 10 + DESC_DVB_DATA_BROADCAST_selector_length(desc))

/* DVB Data Broadcast Id Descriptor */
#define DESC_DVB_DATA_BROADCAST_ID_data_broadcast_id(desc)	(GST_READ_UINT16_BE((desc) + 2))
#define DESC_DVB_DATA_BROADCAST_ID_id_selector_byte(desc)	(desc + 4)

/* DVB Carousel Identifier Descriptor */
#define DESC_DVB_CAROUSEL_IDENTIFIER_carousel_id(desc)		(GST_READ_UINT32_BE((desc) + 2))

/* AC3_audio_stream_descriptor */
#define DESC_AC_AUDIO_STREAM_bsid(desc)             ((desc)[2] & 0x1f)

/* registration_descriptor format IDs */
#define DRF_ID_HDMV       0x48444d56
#define DRF_ID_VC1        0x56432D31   /* defined in RP227 */
#define DRF_ID_DTS1       0x44545331
#define DRF_ID_DTS2       0x44545332
#define DRF_ID_DTS3       0x44545333

typedef struct
{
  guint n_desc;
  guint8 data_length;
  guint8 *data;
} GstMPEGDescriptor;

void gst_mpegtsdesc_init_debug (void);
GstMPEGDescriptor *gst_mpeg_descriptor_parse (guint8 * data, guint size);
void gst_mpeg_descriptor_free                (GstMPEGDescriptor * desc);

guint gst_mpeg_descriptor_n_desc             (GstMPEGDescriptor * desc);
guint8 *gst_mpeg_descriptor_find             (GstMPEGDescriptor * desc, gint tag);
GArray *gst_mpeg_descriptor_find_all         (GstMPEGDescriptor * desc, gint tag);

guint8 *gst_mpeg_descriptor_nth              (GstMPEGDescriptor * desc, guint i);

#endif /* __GST_MPEG_DESC_H__ */
