266 lines
9.1 KiB
C
266 lines
9.1 KiB
C
/*
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* Copyright (c) 2000, 2001 Fabrice Bellard.
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*
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* This library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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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int packet_pos;
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} ASFStream;
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typedef struct {
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uint32_t v1;
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uint16_t v2;
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uint16_t v3;
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uint8_t v4[8];
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} GUID;
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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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int64_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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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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int 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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0x75B22630, 0x668E, 0x11CF, { 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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0x8CABDCA1, 0xA947, 0x11CF, { 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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0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
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};
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static const GUID audio_stream = {
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0xF8699E40, 0x5B4D, 0x11CF, { 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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// 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
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// New value lifted from avifile
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0x20fb5700, 0x5b55, 0x11cf, { 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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0xBFC3CD50, 0x618F, 0x11CF, { 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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0xBC19EFC0, 0x5B4D, 0x11CF, { 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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0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
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};
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static const GUID comment_header = {
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0x75b22633, 0x668e, 0x11cf, { 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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0x86D15240, 0x311D, 0x11D0, { 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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0x86d15241, 0x311d, 0x11d0, { 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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0x75b22636, 0x668e, 0x11cf, { 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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0x5fbf03b5, 0xa92e, 0x11cf, { 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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0xabd3d211, 0xa9ba, 0x11cf, { 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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0xD2D0A440, 0xE307, 0x11D2, { 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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0x33000890, 0xE5B1, 0x11CF, { 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB },
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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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