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/*
* Copyright (c) 2000, 2001 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_ASF_H
#define AVFORMAT_ASF_H
#include <stdint.h>
#include "avformat.h"
#include "metadata.h"
#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;
int64_t packet_pos;
} ASFStream;
typedef uint8_t GUID[16];
typedef struct {
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 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 - subtract 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 packet_number;
uint16_t packet_count;
} ASFIndex;
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
uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
/* non streamed additonnal info */
uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting
int64_t duration; ///< in 100ns units
/* packet filling */
unsigned char multi_payloads_present;
int packet_size_left;
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; ///< beginning of the first data packet
uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
uint64_t data_object_size; ///< size of the data object
int index_read;
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;
unsigned int packet_frag_offset;
unsigned int packet_frag_size;
int64_t packet_frag_timestamp;
int packet_multi_size;
int packet_obj_size;
int packet_time_delta;
int packet_time_start;
int64_t packet_pos;
int stream_index;
int64_t last_indexed_pts;
ASFIndex* index_ptr;
uint32_t nb_index_count;
uint32_t nb_index_memory_alloc;
uint16_t maximum_packet;
ASFStream* asf_st; ///< currently decoded stream
} ASFContext;
extern const GUID ff_asf_header;
extern const GUID ff_asf_file_header;
extern const GUID ff_asf_stream_header;
extern const GUID ff_asf_ext_stream_header;
extern const GUID ff_asf_audio_stream;
extern const GUID ff_asf_audio_conceal_none;
extern const GUID ff_asf_audio_conceal_spread;
extern const GUID ff_asf_video_stream;
extern const GUID ff_asf_video_conceal_none;
extern const GUID ff_asf_command_stream;
extern const GUID ff_asf_comment_header;
extern const GUID ff_asf_codec_comment_header;
extern const GUID ff_asf_codec_comment1_header;
extern const GUID ff_asf_data_header;
extern const GUID ff_asf_head1_guid;
extern const GUID ff_asf_head2_guid;
extern const GUID ff_asf_extended_content_header;
extern const GUID ff_asf_simple_index_header;
extern const GUID ff_asf_ext_stream_embed_stream_header;
extern const GUID ff_asf_ext_stream_audio_stream;
extern const GUID ff_asf_metadata_header;
extern const GUID ff_asf_my_guid;
extern const AVMetadataConv ff_asf_metadata_conv[];
#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
extern AVInputFormat asf_demuxer;
/**
* Load a single ASF packet into the demuxer.
* @param s demux context
* @param pb context to read data from
* @returns 0 on success, <0 on error
*/
int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb);
/**
* Parse data from individual ASF packets (which were previously loaded
* with asf_get_packet()).
* @param s demux context
* @param pb context to read data from
* @param pkt pointer to store packet data into
* @returns 0 if data was stored in pkt, <0 on error or 1 if more ASF
* packets need to be loaded (through asf_get_packet())
*/
int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt);
#endif /* AVFORMAT_ASF_H */
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