/* * 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 */ #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; int ds_data_size; int ds_silence_data; int64_t packet_pos; } ASFStream; typedef struct { uint32_t v1; uint16_t v2; uint16_t v3; uint8_t v4[8]; } GUID; 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 packets_count; // how many packets are there in the file // 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 - substract 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 */ /* non streamed additonnal info */ int64_t nb_packets; int64_t duration; /* in 100ns units */ /* packet filling */ unsigned char multi_payloads_present; int packet_size_left; int prev_packet_sent_time; 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; /* begining 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; int packet_frag_offset; int packet_frag_size; int 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; static const GUID asf_header = { 0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, }; static const GUID file_header = { 0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, }; static const GUID stream_header = { 0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, }; static const GUID ext_stream_header = { 0x14E6A5CB, 0xC672, 0x4332, { 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A }, }; static const GUID audio_stream = { 0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B }, }; static const GUID audio_conceal_none = { // 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 }, // New value lifted from avifile 0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b }, }; static const GUID audio_conceal_spread = { 0xBFC3CD50, 0x618F, 0x11CF, { 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, }; static const GUID video_stream = { 0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B }, }; static const GUID video_conceal_none = { 0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B }, }; static const GUID command_stream = { 0x59DACFC0, 0x59E6, 0x11D0, { 0xA3, 0xAC, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, }; static const GUID comment_header = { 0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c }, }; static const GUID codec_comment_header = { 0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, }; static const GUID codec_comment1_header = { 0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 }, }; static const GUID data_header = { 0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c }, }; static const GUID head1_guid = { 0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 }, }; static const GUID head2_guid = { 0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 }, }; static const GUID extended_content_header = { 0xD2D0A440, 0xE307, 0x11D2, { 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50 }, }; static const GUID simple_index_header = { 0x33000890, 0xE5B1, 0x11CF, { 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, }; static const GUID ext_stream_embed_stream_header = { 0x3afb65e2, 0x47ef, 0x40f2, { 0xac, 0x2c, 0x70, 0xa9, 0x0d, 0x71, 0xd3, 0x43} }; static const GUID ext_stream_audio_stream = { 0x31178c9d, 0x03e1, 0x4528, { 0xb5, 0x82, 0x3d, 0xf9, 0xdb, 0x22, 0xf5, 0x03} }; /* I am not a number !!! This GUID is the one found on the PC used to generate the stream */ static const GUID my_guid = { 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 }, }; #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