/***************************************************************************
    copyright            : (C) 2002 - 2008 by Scott Wheeler
    email                : wheeler@kde.org
 ***************************************************************************/

/***************************************************************************
 *   This library is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Lesser General Public License version   *
 *   2.1 as published by the Free Software Foundation.                     *
 *                                                                         *
 *   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     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the Free Software   *
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA         *
 *   02110-1301  USA                                                       *
 *                                                                         *
 *   Alternatively, this file is available under the Mozilla Public        *
 *   License Version 1.1.  You may obtain a copy of the License at         *
 *   http://www.mozilla.org/MPL/                                           *
 ***************************************************************************/



#define PACKET_SIZE 3200

// typedef struct {
//     int num;
//     unsigned char seq;
//     /* use for reading */
//     AVPacket pkt;
//     int frag_offset;
//     int timestamp;
//     int64_t duration;

//     int ds_span;     /* descrambling  */
//     int ds_packet_size;
//     int ds_chunk_size;
//     int ds_data_size;
//     int ds_silence_data;

//     int packet_pos;

// } ASFStream;


typedef struct {
	uint32_t v1;
	uint16_t v2;
	uint16_t v3;
	uint8_t v4[8];
} TAGGER_GUID;

typedef struct {
	TAGGER_GUID guid;           // generated by client computer
	uint64_t file_size;     // in bytes
	// invalid if broadcasting
	uint64_t create_time;   // time of creation, in 100-nanosecond units since 1.1.1601
	// invalid if broadcasting
	uint64_t packets_count; // how many packets are there in the file
	// invalid if broadcasting
	uint64_t play_time;     // play time, in 100-nanosecond units
	// invalid if broadcasting
	uint64_t send_time;     // time to send file, in 100-nanosecond units
	// invalid if broadcasting (could be ignored)
	uint32_t preroll;       // timestamp of the first packet, in milliseconds
	// if nonzero - substract from time
	uint32_t ignore;            // preroll is 64bit - but let's just ignore it
	uint32_t flags;     // 0x01 - broadcast
	// 0x02 - seekable
	// rest is reserved should be 0
	uint32_t min_pktsize;   // size of a data packet
	// invalid if broadcasting
	uint32_t max_pktsize;   // shall be the same as for min_pktsize
	// invalid if broadcasting
	uint32_t max_bitrate;   // bandwith of stream in bps
	// should be the sum of bitrates of the
	// individual media streams
} ASFMainHeader;


typedef struct {
	uint32_t seqno;
	unsigned int packet_size;
	int is_streamed;
	int asfid2avid[128];        /* conversion table from asf ID 2 AVStream ID */
	//    ASFStream streams[128];   /* it's max number and it's not that big */
	/* non streamed additonnal info */
	int64_t nb_packets;
	int64_t duration; /* in 100ns units */
	/* packet filling */
	unsigned char multi_payloads_present;
	int packet_size_left;
	int prev_packet_sent_time;
	int packet_timestamp_start;
	int packet_timestamp_end;
	unsigned int packet_nb_payloads;
	int packet_nb_frames;
	uint8_t packet_buf[PACKET_SIZE];
	//    ByteIOContext pb;
	/* only for reading */
	uint64_t data_offset; /* begining of the first data packet */

	//    ASFMainHeader hdr;

	int packet_flags;
	int packet_property;
	int packet_timestamp;
	int packet_segsizetype;
	int packet_segments;
	int packet_seq;
	int packet_replic_size;
	int packet_key_frame;
	int packet_padsize;
	int packet_frag_offset;
	int packet_frag_size;
	int packet_frag_timestamp;
	int packet_multi_size;
	int packet_obj_size;
	int packet_time_delta;
	int packet_time_start;
	int packet_pos;

	int stream_index;
	//    ASFStream* asf_st; /* currently decoded stream */
} ASFContext;

static const TAGGER_GUID asf_header = {
	0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
};

static const TAGGER_GUID file_header = {
	0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
};

static const TAGGER_GUID stream_header = {
	0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
};

static const TAGGER_GUID audio_stream = {
	0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
};

static const TAGGER_GUID audio_conceal_none = {
	// 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
	// New value lifted from avifile
	0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
};

static const TAGGER_GUID video_stream = {
	0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
};

static const TAGGER_GUID video_conceal_none = {
	0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
};


static const TAGGER_GUID comment_header = {
	0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
};

static const TAGGER_GUID codec_comment_header = {
	0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
};
static const TAGGER_GUID codec_comment1_header = {
	0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
};

static const TAGGER_GUID data_header = {
	0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
};

static const TAGGER_GUID head1_guid = {
	0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
};

static const TAGGER_GUID head2_guid = {
	0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
};

static const TAGGER_GUID extended_content_header = {
	0xD2D0A440, 0xE307, 0x11D2, { 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50 },
};

/* I am not a number !!! This GUID is the one found on the PC used to
   generate the stream */
static const TAGGER_GUID my_guid = {
	0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
};

#define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000


//   ASF data packet structure
//   =========================
//
//
//  -----------------------------------
// | Error Correction Data             |  Optional
//  -----------------------------------
// | Payload Parsing Information (PPI) |
//  -----------------------------------
// | Payload Data                      |
//  -----------------------------------
// | Padding Data                      |
//  -----------------------------------


// PPI_FLAG - Payload parsing information flags
#define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1

#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010
#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100
#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
#define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110

#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000
#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000
#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
#define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000

#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000
#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000
#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
#define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000

// PL_FLAG - Payload flags
#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001
#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010
#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011
#define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011

#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100
#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000
#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
#define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100

#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000
#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000
#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
#define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000

#define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
#define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000

#define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
#define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000
#define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000

#define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
