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280 lines
10 KiB
280 lines
10 KiB
/* |
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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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#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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int ds_data_size; |
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int ds_silence_data; |
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int64_t packet_pos; |
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} ASFStream; |
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typedef uint8_t GUID[16]; |
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typedef struct { |
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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 packets_count; // how many packets are there in the file |
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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 - substract 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; // bandwith 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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typedef struct { |
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uint32_t seqno; |
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unsigned int packet_size; |
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int is_streamed; |
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int asfid2avid[128]; /* conversion table from asf ID 2 AVStream ID */ |
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ASFStream streams[128]; /* it's max number and it's not that big */ |
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/* non streamed additonnal info */ |
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uint64_t nb_packets; |
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int64_t duration; /* in 100ns units */ |
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/* packet filling */ |
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unsigned char multi_payloads_present; |
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int packet_size_left; |
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int prev_packet_sent_time; |
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int packet_timestamp_start; |
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int packet_timestamp_end; |
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unsigned int packet_nb_payloads; |
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int packet_nb_frames; |
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uint8_t packet_buf[PACKET_SIZE]; |
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ByteIOContext pb; |
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/* only for reading */ |
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uint64_t data_offset; /* begining of the first data packet */ |
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uint64_t data_object_offset; /* data object offset (excl. GUID & size)*/ |
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uint64_t data_object_size; /* size of the data object */ |
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int index_read; |
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ASFMainHeader hdr; |
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int packet_flags; |
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int packet_property; |
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int packet_timestamp; |
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int packet_segsizetype; |
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int packet_segments; |
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int packet_seq; |
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int packet_replic_size; |
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int packet_key_frame; |
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int packet_padsize; |
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int packet_frag_offset; |
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int packet_frag_size; |
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int packet_frag_timestamp; |
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int packet_multi_size; |
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int packet_obj_size; |
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int packet_time_delta; |
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int packet_time_start; |
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int64_t packet_pos; |
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int stream_index; |
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int64_t last_indexed_pts; |
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ASFIndex* index_ptr; |
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uint32_t nb_index_count; |
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uint32_t nb_index_memory_alloc; |
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uint16_t maximum_packet; |
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ASFStream* asf_st; /* currently decoded stream */ |
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} ASFContext; |
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static const GUID asf_header = { |
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0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C |
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}; |
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static const GUID file_header = { |
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0xA1, 0xDC, 0xAB, 0x8C, 0x47, 0xA9, 0xCF, 0x11, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 |
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}; |
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static const GUID stream_header = { |
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0x91, 0x07, 0xDC, 0xB7, 0xB7, 0xA9, 0xCF, 0x11, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 |
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}; |
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static const GUID ext_stream_header = { |
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0xCB, 0xA5, 0xE6, 0x14, 0x72, 0xC6, 0x32, 0x43, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A |
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}; |
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static const GUID audio_stream = { |
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0x40, 0x9E, 0x69, 0xF8, 0x4D, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B |
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}; |
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static const GUID audio_conceal_none = { |
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// 0x40, 0xa4, 0xf1, 0x49, 0x4ece, 0x11d0, 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 |
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// New value lifted from avifile |
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0x00, 0x57, 0xfb, 0x20, 0x55, 0x5B, 0xCF, 0x11, 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b |
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}; |
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static const GUID audio_conceal_spread = { |
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0x50, 0xCD, 0xC3, 0xBF, 0x8F, 0x61, 0xCF, 0x11, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 |
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}; |
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static const GUID video_stream = { |
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0xC0, 0xEF, 0x19, 0xBC, 0x4D, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B |
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}; |
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static const GUID video_conceal_none = { |
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0x00, 0x57, 0xFB, 0x20, 0x55, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B |
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}; |
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static const GUID command_stream = { |
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0xC0, 0xCF, 0xDA, 0x59, 0xE6, 0x59, 0xD0, 0x11, 0xA3, 0xAC, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 |
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}; |
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static const GUID comment_header = { |
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0x33, 0x26, 0xb2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c |
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}; |
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static const GUID codec_comment_header = { |
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0x40, 0x52, 0xD1, 0x86, 0x1D, 0x31, 0xD0, 0x11, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 |
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}; |
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static const GUID codec_comment1_header = { |
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0x41, 0x52, 0xd1, 0x86, 0x1D, 0x31, 0xD0, 0x11, 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 |
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}; |
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static const GUID data_header = { |
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0x36, 0x26, 0xb2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c |
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}; |
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static const GUID head1_guid = { |
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0xb5, 0x03, 0xbf, 0x5f, 0x2E, 0xA9, 0xCF, 0x11, 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 |
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}; |
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static const GUID head2_guid = { |
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0x11, 0xd2, 0xd3, 0xab, 0xBA, 0xA9, 0xCF, 0x11, 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 |
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}; |
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static const GUID extended_content_header = { |
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0x40, 0xA4, 0xD0, 0xD2, 0x07, 0xE3, 0xD2, 0x11, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50 |
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}; |
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static const GUID simple_index_header = { |
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0x90, 0x08, 0x00, 0x33, 0xB1, 0xE5, 0xCF, 0x11, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB |
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}; |
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static const GUID ext_stream_embed_stream_header = { |
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0xe2, 0x65, 0xfb, 0x3a, 0xEF, 0x47, 0xF2, 0x40, 0xac, 0x2c, 0x70, 0xa9, 0x0d, 0x71, 0xd3, 0x43 |
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}; |
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static const GUID ext_stream_audio_stream = { |
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0x9d, 0x8c, 0x17, 0x31, 0xE1, 0x03, 0x28, 0x45, 0xb5, 0x82, 0x3d, 0xf9, 0xdb, 0x22, 0xf5, 0x03 |
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}; |
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/* I am not a number !!! This GUID is the one found on the PC used to |
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generate the stream */ |
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static const GUID my_guid = { |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
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}; |
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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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