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ffmpeg / libavformat / asf.h @ 83120e3b

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/*
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 * Copyright (c) 2000, 2001 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVFORMAT_ASF_H
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#define AVFORMAT_ASF_H
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#include <stdint.h>
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#include "avformat.h"
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#include "metadata.h"
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#define PACKET_SIZE 3200
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typedef struct {
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    int num;
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    unsigned char seq;
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    /* use for reading */
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    AVPacket pkt;
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    int frag_offset;
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    int timestamp;
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    int64_t duration;
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    int ds_span;                /* descrambling  */
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    int ds_packet_size;
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    int ds_chunk_size;
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    int64_t packet_pos;
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    uint16_t stream_language_index;
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} ASFStream;
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typedef uint8_t ff_asf_guid[16];
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typedef struct {
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    ff_asf_guid guid;                  ///< generated by client computer
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    uint64_t file_size;         /**< in bytes
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                                 *   invalid if broadcasting */
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    uint64_t create_time;       /**< time of creation, in 100-nanosecond units since 1.1.1601
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                                 *   invalid if broadcasting */
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    uint64_t play_time;         /**< play time, in 100-nanosecond units
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                                 * invalid if broadcasting */
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    uint64_t send_time;         /**< time to send file, in 100-nanosecond units
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                                 *   invalid if broadcasting (could be ignored) */
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    uint32_t preroll;           /**< timestamp of the first packet, in milliseconds
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                                 *   if nonzero - subtract from time */
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    uint32_t ignore;            ///< preroll is 64bit - but let's just ignore it
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    uint32_t flags;             /**< 0x01 - broadcast
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                                 *   0x02 - seekable
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                                 *   rest is reserved should be 0 */
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    uint32_t min_pktsize;       /**< size of a data packet
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                                 *   invalid if broadcasting */
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    uint32_t max_pktsize;       /**< shall be the same as for min_pktsize
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                                 *   invalid if broadcasting */
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    uint32_t max_bitrate;       /**< bandwidth of stream in bps
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                                 *   should be the sum of bitrates of the
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                                 *   individual media streams */
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} ASFMainHeader;
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typedef struct {
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    uint32_t packet_number;
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    uint16_t packet_count;
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} ASFIndex;
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extern const ff_asf_guid ff_asf_header;
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extern const ff_asf_guid ff_asf_file_header;
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extern const ff_asf_guid ff_asf_stream_header;
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extern const ff_asf_guid ff_asf_ext_stream_header;
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extern const ff_asf_guid ff_asf_audio_stream;
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extern const ff_asf_guid ff_asf_audio_conceal_none;
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extern const ff_asf_guid ff_asf_audio_conceal_spread;
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extern const ff_asf_guid ff_asf_video_stream;
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extern const ff_asf_guid ff_asf_jfif_media;
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extern const ff_asf_guid ff_asf_video_conceal_none;
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extern const ff_asf_guid ff_asf_command_stream;
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extern const ff_asf_guid ff_asf_comment_header;
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extern const ff_asf_guid ff_asf_codec_comment_header;
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extern const ff_asf_guid ff_asf_codec_comment1_header;
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extern const ff_asf_guid ff_asf_data_header;
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extern const ff_asf_guid ff_asf_head1_guid;
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extern const ff_asf_guid ff_asf_head2_guid;
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extern const ff_asf_guid ff_asf_extended_content_header;
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extern const ff_asf_guid ff_asf_simple_index_header;
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extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;
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extern const ff_asf_guid ff_asf_ext_stream_audio_stream;
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extern const ff_asf_guid ff_asf_metadata_header;
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extern const ff_asf_guid ff_asf_marker_header;
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extern const ff_asf_guid ff_asf_my_guid;
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extern const ff_asf_guid ff_asf_language_guid;
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extern const ff_asf_guid ff_asf_content_encryption;
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extern const ff_asf_guid ff_asf_ext_content_encryption;
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extern const ff_asf_guid ff_asf_digital_signature;
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extern const AVMetadataConv ff_asf_metadata_conv[];
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#define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
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//   ASF data packet structure
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//   =========================
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//
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//
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//  -----------------------------------
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// | Error Correction Data             |  Optional
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//  -----------------------------------
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// | Payload Parsing Information (PPI) |
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//  -----------------------------------
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// | Payload Data                      |
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//  -----------------------------------
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// | Padding Data                      |
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//  -----------------------------------
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// PPI_FLAG - Payload parsing information flags
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#define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
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#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE  0x02 //0000 0010
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#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD  0x04 //0000 0100
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#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
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#define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE     0x06 //0000 0110
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#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE  0x08 //0000 1000
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#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD  0x10 //0001 0000
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#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
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#define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE     0x18 //0001 1000
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#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE  0x20 //0010 0000
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#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD  0x40 //0100 0000
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#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
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#define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE     0x60 //0110 0000
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// PL_FLAG - Payload flags
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#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE   0x01 //0000 0001
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#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD   0x02 //0000 0010
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#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD  0x03 //0000 0011
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#define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE      0x03 //0000 0011
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#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE  0x04 //0000 0100
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#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD  0x08 //0000 1000
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#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
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#define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE     0x0c //0000 1100
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#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE  0x10 //0001 0000
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#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD  0x20 //0010 0000
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#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
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#define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE     0x30 //0011 0000
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#define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
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#define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE     0xc0 //1100 0000
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#define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE  0x40 //0100 0000
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#define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD  0x80 //1000 0000
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#define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE     0xc0 //1100 0000
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#define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
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extern AVInputFormat ff_asf_demuxer;
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static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
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{
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    return memcmp(g1, g2, sizeof(ff_asf_guid));
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}
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void ff_get_guid(ByteIOContext *s, ff_asf_guid *g);
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#endif /* AVFORMAT_ASF_H */