| 1 | /*
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| 2 | * Copyright (c) 2000, 2001 Fabrice Bellard.
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| 3 | *
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| 4 | * This library is free software; you can redistribute it and/or
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| 5 | * modify it under the terms of the GNU Lesser General Public
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| 6 | * License as published by the Free Software Foundation; either
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| 7 | * version 2 of the License, or (at your option) any later version.
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| 8 | *
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| 9 | * This library is distributed in the hope that it will be useful,
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 12 | * Lesser General Public License for more details.
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| 13 | *
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| 14 | * You should have received a copy of the GNU Lesser General Public
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| 15 | * License along with this library; if not, write to the Free Software
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| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 17 | */
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| 18 | #define PACKET_SIZE 3200
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| 19 |
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| 20 | typedef struct {
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| 21 | int num;
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| 22 | unsigned char seq;
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| 23 | /* use for reading */
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| 24 | AVPacket pkt;
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| 25 | int frag_offset;
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| 26 | int timestamp;
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| 27 | int64_t duration;
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| 28 |
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| 29 | int ds_span; /* descrambling */
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| 30 | int ds_packet_size;
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| 31 | int ds_chunk_size;
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| 32 | int ds_data_size;
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| 33 | int ds_silence_data;
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| 34 |
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| 35 | int packet_pos;
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| 36 |
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| 37 | } ASFStream;
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| 38 |
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| 39 | typedef struct {
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| 40 | uint32_t v1;
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| 41 | uint16_t v2;
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| 42 | uint16_t v3;
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| 43 | uint8_t v4[8];
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| 44 | } GUID;
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| 45 |
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| 46 | typedef struct {
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| 47 | GUID guid; // generated by client computer
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| 48 | uint64_t file_size; // in bytes
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| 49 | // invalid if broadcasting
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| 50 | uint64_t create_time; // time of creation, in 100-nanosecond units since 1.1.1601
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| 51 | // invalid if broadcasting
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| 52 | uint64_t packets_count; // how many packets are there in the file
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| 53 | // invalid if broadcasting
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| 54 | uint64_t play_time; // play time, in 100-nanosecond units
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| 55 | // invalid if broadcasting
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| 56 | uint64_t send_time; // time to send file, in 100-nanosecond units
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| 57 | // invalid if broadcasting (could be ignored)
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| 58 | uint32_t preroll; // timestamp of the first packet, in milliseconds
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| 59 | // if nonzero - substract from time
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| 60 | uint32_t ignore; // preroll is 64bit - but let's just ignore it
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| 61 | uint32_t flags; // 0x01 - broadcast
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| 62 | // 0x02 - seekable
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| 63 | // rest is reserved should be 0
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| 64 | uint32_t min_pktsize; // size of a data packet
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| 65 | // invalid if broadcasting
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| 66 | uint32_t max_pktsize; // shall be the same as for min_pktsize
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| 67 | // invalid if broadcasting
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| 68 | uint32_t max_bitrate; // bandwith of stream in bps
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| 69 | // should be the sum of bitrates of the
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| 70 | // individual media streams
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| 71 | } ASFMainHeader;
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| 72 |
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| 73 |
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| 74 | typedef struct {
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| 75 | uint32_t packet_number;
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| 76 | uint16_t packet_count;
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| 77 | } ASFIndex;
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| 78 |
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| 79 |
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| 80 | typedef struct {
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| 81 | uint32_t seqno;
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| 82 | unsigned int packet_size;
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| 83 | int is_streamed;
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| 84 | int asfid2avid[128]; /* conversion table from asf ID 2 AVStream ID */
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| 85 | ASFStream streams[128]; /* it's max number and it's not that big */
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| 86 | /* non streamed additonnal info */
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| 87 | int64_t nb_packets;
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| 88 | int64_t duration; /* in 100ns units */
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| 89 | /* packet filling */
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| 90 | unsigned char multi_payloads_present;
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| 91 | int packet_size_left;
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| 92 | int prev_packet_sent_time;
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| 93 | int packet_timestamp_start;
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| 94 | int packet_timestamp_end;
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| 95 | unsigned int packet_nb_payloads;
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| 96 | int packet_nb_frames;
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| 97 | uint8_t packet_buf[PACKET_SIZE];
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| 98 | ByteIOContext pb;
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| 99 | /* only for reading */
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| 100 | uint64_t data_offset; /* begining of the first data packet */
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| 101 |
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| 102 | ASFMainHeader hdr;
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| 103 |
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| 104 | int packet_flags;
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| 105 | int packet_property;
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| 106 | int packet_timestamp;
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| 107 | int packet_segsizetype;
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| 108 | int packet_segments;
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| 109 | int packet_seq;
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| 110 | int packet_replic_size;
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| 111 | int packet_key_frame;
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| 112 | int packet_padsize;
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| 113 | int packet_frag_offset;
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| 114 | int packet_frag_size;
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| 115 | int packet_frag_timestamp;
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| 116 | int packet_multi_size;
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| 117 | int packet_obj_size;
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| 118 | int packet_time_delta;
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| 119 | int packet_time_start;
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| 120 | int packet_pos;
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| 121 |
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| 122 | int stream_index;
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| 123 |
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| 124 |
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| 125 | int64_t last_indexed_pts;
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| 126 | ASFIndex* index_ptr;
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| 127 | uint32_t nb_index_count;
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| 128 | uint32_t nb_index_memory_alloc;
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| 129 | uint16_t maximum_packet;
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| 130 |
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| 131 | ASFStream* asf_st; /* currently decoded stream */
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| 132 | } ASFContext;
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| 133 |
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| 134 | static const GUID asf_header = {
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| 135 | 0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
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| 136 | };
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| 137 |
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| 138 | static const GUID file_header = {
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| 139 | 0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
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| 140 | };
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| 141 |
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| 142 | static const GUID stream_header = {
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| 143 | 0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
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| 144 | };
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| 145 |
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| 146 | static const GUID ext_stream_header = {
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| 147 | 0x14E6A5CB, 0xC672, 0x4332, { 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A },
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| 148 | };
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| 149 |
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| 150 | static const GUID audio_stream = {
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| 151 | 0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
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| 152 | };
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| 153 |
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| 154 | static const GUID audio_conceal_none = {
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| 155 | // 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
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| 156 | // New value lifted from avifile
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| 157 | 0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
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| 158 | };
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| 159 |
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| 160 | static const GUID audio_conceal_spread = {
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| 161 | 0xBFC3CD50, 0x618F, 0x11CF, { 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 },
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| 162 | };
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| 163 |
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| 164 | static const GUID video_stream = {
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| 165 | 0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
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| 166 | };
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| 167 |
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| 168 | static const GUID video_conceal_none = {
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| 169 | 0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
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| 170 | };
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| 171 |
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| 172 | static const GUID command_stream = {
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| 173 | 0x59DACFC0, 0x59E6, 0x11D0, { 0xA3, 0xAC, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
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| 174 | };
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| 175 |
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| 176 | static const GUID comment_header = {
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| 177 | 0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
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| 178 | };
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| 179 |
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| 180 | static const GUID codec_comment_header = {
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| 181 | 0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
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| 182 | };
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| 183 | static const GUID codec_comment1_header = {
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| 184 | 0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
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| 185 | };
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| 186 |
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| 187 | static const GUID data_header = {
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| 188 | 0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
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| 189 | };
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| 190 |
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| 191 | static const GUID head1_guid = {
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| 192 | 0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
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| 193 | };
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| 194 |
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| 195 | static const GUID head2_guid = {
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| 196 | 0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
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| 197 | };
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| 198 |
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| 199 | static const GUID extended_content_header = {
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| 200 | 0xD2D0A440, 0xE307, 0x11D2, { 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50 },
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| 201 | };
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| 202 |
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| 203 | static const GUID simple_index_header = {
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| 204 | 0x33000890, 0xE5B1, 0x11CF, { 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB },
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| 205 | };
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| 206 |
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| 207 | static const GUID ext_stream_embed_stream_header = {
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| 208 | 0x3afb65e2, 0x47ef, 0x40f2, { 0xac, 0x2c, 0x70, 0xa9, 0x0d, 0x71, 0xd3, 0x43}
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| 209 | };
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| 210 |
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| 211 | static const GUID ext_stream_audio_stream = {
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| 212 | 0x31178c9d, 0x03e1, 0x4528, { 0xb5, 0x82, 0x3d, 0xf9, 0xdb, 0x22, 0xf5, 0x03}
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| 213 | };
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| 214 |
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| 215 | /* I am not a number !!! This GUID is the one found on the PC used to
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| 216 | generate the stream */
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| 217 | static const GUID my_guid = {
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| 218 | 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
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| 219 | };
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| 220 |
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| 221 | #define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000
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| 222 |
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| 223 |
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| 224 | // ASF data packet structure
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| 225 | // =========================
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| 226 | //
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| 227 | //
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| 228 | // -----------------------------------
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| 229 | // | Error Correction Data | Optional
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| 230 | // -----------------------------------
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| 231 | // | Payload Parsing Information (PPI) |
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| 232 | // -----------------------------------
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| 233 | // | Payload Data |
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| 234 | // -----------------------------------
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| 235 | // | Padding Data |
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| 236 | // -----------------------------------
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| 237 |
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| 238 |
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| 239 | // PPI_FLAG - Payload parsing information flags
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| 240 | #define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1
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| 241 |
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| 242 | #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE 0x02 //0000 0010
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| 243 | #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD 0x04 //0000 0100
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| 244 | #define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110
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| 245 | #define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE 0x06 //0000 0110
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| 246 |
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| 247 | #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE 0x08 //0000 1000
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| 248 | #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD 0x10 //0001 0000
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| 249 | #define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000
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| 250 | #define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE 0x18 //0001 1000
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| 251 |
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| 252 | #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE 0x20 //0010 0000
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| 253 | #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD 0x40 //0100 0000
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| 254 | #define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000
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| 255 | #define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE 0x60 //0110 0000
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| 256 |
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| 257 | // PL_FLAG - Payload flags
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| 258 | #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE 0x01 //0000 0001
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| 259 | #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD 0x02 //0000 0010
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| 260 | #define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD 0x03 //0000 0011
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| 261 | #define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE 0x03 //0000 0011
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| 262 |
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| 263 | #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE 0x04 //0000 0100
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| 264 | #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD 0x08 //0000 1000
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| 265 | #define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100
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| 266 | #define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE 0x0c //0000 1100
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| 267 |
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| 268 | #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE 0x10 //0001 0000
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| 269 | #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD 0x20 //0010 0000
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| 270 | #define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000
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| 271 | #define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE 0x30 //0011 0000
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| 272 |
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| 273 | #define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE 0x40 //0100 0000
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| 274 | #define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE 0xc0 //1100 0000
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| 275 |
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| 276 | #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE 0x40 //0100 0000
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| 277 | #define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD 0x80 //1000 0000
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| 278 | #define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE 0xc0 //1100 0000
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| 279 |
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| 280 | #define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000
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