1/* 2 * Copyright (c) 2000, 2001 Fabrice Bellard 3 * 4 * This file is part of Libav. 5 * 6 * Libav is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * Libav is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with Libav; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifndef AVFORMAT_ASF_H 22#define AVFORMAT_ASF_H 23 24#include <stdint.h> 25#include "avformat.h" 26#include "metadata.h" 27 28#define PACKET_SIZE 3200 29 30typedef struct { 31 int num; 32 unsigned char seq; 33 /* use for reading */ 34 AVPacket pkt; 35 int frag_offset; 36 int timestamp; 37 int64_t duration; 38 39 int ds_span; /* descrambling */ 40 int ds_packet_size; 41 int ds_chunk_size; 42 43 int64_t packet_pos; 44 45 uint16_t stream_language_index; 46 47 int palette_changed; 48 uint32_t palette[256]; 49} ASFStream; 50 51typedef uint8_t ff_asf_guid[16]; 52 53typedef struct { 54 ff_asf_guid guid; ///< generated by client computer 55 uint64_t file_size; /**< in bytes 56 * invalid if broadcasting */ 57 uint64_t create_time; /**< time of creation, in 100-nanosecond units since 1.1.1601 58 * invalid if broadcasting */ 59 uint64_t play_time; /**< play time, in 100-nanosecond units 60 * invalid if broadcasting */ 61 uint64_t send_time; /**< time to send file, in 100-nanosecond units 62 * invalid if broadcasting (could be ignored) */ 63 uint32_t preroll; /**< timestamp of the first packet, in milliseconds 64 * if nonzero - subtract from time */ 65 uint32_t ignore; ///< preroll is 64bit - but let's just ignore it 66 uint32_t flags; /**< 0x01 - broadcast 67 * 0x02 - seekable 68 * rest is reserved should be 0 */ 69 uint32_t min_pktsize; /**< size of a data packet 70 * invalid if broadcasting */ 71 uint32_t max_pktsize; /**< shall be the same as for min_pktsize 72 * invalid if broadcasting */ 73 uint32_t max_bitrate; /**< bandwidth of stream in bps 74 * should be the sum of bitrates of the 75 * individual media streams */ 76} ASFMainHeader; 77 78 79typedef struct { 80 uint32_t packet_number; 81 uint16_t packet_count; 82} ASFIndex; 83 84extern const ff_asf_guid ff_asf_header; 85extern const ff_asf_guid ff_asf_file_header; 86extern const ff_asf_guid ff_asf_stream_header; 87extern const ff_asf_guid ff_asf_ext_stream_header; 88extern const ff_asf_guid ff_asf_audio_stream; 89extern const ff_asf_guid ff_asf_audio_conceal_none; 90extern const ff_asf_guid ff_asf_audio_conceal_spread; 91extern const ff_asf_guid ff_asf_video_stream; 92extern const ff_asf_guid ff_asf_jfif_media; 93extern const ff_asf_guid ff_asf_video_conceal_none; 94extern const ff_asf_guid ff_asf_command_stream; 95extern const ff_asf_guid ff_asf_comment_header; 96extern const ff_asf_guid ff_asf_codec_comment_header; 97extern const ff_asf_guid ff_asf_codec_comment1_header; 98extern const ff_asf_guid ff_asf_data_header; 99extern const ff_asf_guid ff_asf_head1_guid; 100extern const ff_asf_guid ff_asf_head2_guid; 101extern const ff_asf_guid ff_asf_extended_content_header; 102extern const ff_asf_guid ff_asf_simple_index_header; 103extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header; 104extern const ff_asf_guid ff_asf_ext_stream_audio_stream; 105extern const ff_asf_guid ff_asf_metadata_header; 106extern const ff_asf_guid ff_asf_marker_header; 107extern const ff_asf_guid ff_asf_my_guid; 108extern const ff_asf_guid ff_asf_language_guid; 109extern const ff_asf_guid ff_asf_content_encryption; 110extern const ff_asf_guid ff_asf_ext_content_encryption; 111extern const ff_asf_guid ff_asf_digital_signature; 112 113extern const AVMetadataConv ff_asf_metadata_conv[]; 114 115#define ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT 0x80 //1000 0000 116 117 118// ASF data packet structure 119// ========================= 120// 121// 122// ----------------------------------- 123// | Error Correction Data | Optional 124// ----------------------------------- 125// | Payload Parsing Information (PPI) | 126// ----------------------------------- 127// | Payload Data | 128// ----------------------------------- 129// | Padding Data | 130// ----------------------------------- 131 132 133// PPI_FLAG - Payload parsing information flags 134#define ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT 1 135 136#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE 0x02 //0000 0010 137#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD 0x04 //0000 0100 138#define ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD 0x06 //0000 0110 139#define ASF_PPI_MASK_SEQUENCE_FIELD_SIZE 0x06 //0000 0110 140 141#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE 0x08 //0000 1000 142#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD 0x10 //0001 0000 143#define ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD 0x18 //0001 1000 144#define ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE 0x18 //0001 1000 145 146#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE 0x20 //0010 0000 147#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD 0x40 //0100 0000 148#define ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD 0x60 //0110 0000 149#define ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE 0x60 //0110 0000 150 151// PL_FLAG - Payload flags 152#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE 0x01 //0000 0001 153#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD 0x02 //0000 0010 154#define ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD 0x03 //0000 0011 155#define ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE 0x03 //0000 0011 156 157#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE 0x04 //0000 0100 158#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD 0x08 //0000 1000 159#define ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD 0x0c //0000 1100 160#define ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE 0x0c //0000 1100 161 162#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE 0x10 //0001 0000 163#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD 0x20 //0010 0000 164#define ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD 0x30 //0011 0000 165#define ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE 0x30 //0011 0000 166 167#define ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE 0x40 //0100 0000 168#define ASF_PL_MASK_STREAM_NUMBER_LENGTH_FIELD_SIZE 0xc0 //1100 0000 169 170#define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE 0x40 //0100 0000 171#define ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD 0x80 //1000 0000 172#define ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE 0xc0 //1100 0000 173 174#define ASF_PL_FLAG_KEY_FRAME 0x80 //1000 0000 175 176extern AVInputFormat ff_asf_demuxer; 177 178static av_always_inline int ff_guidcmp(const void *g1, const void *g2) 179{ 180 return memcmp(g1, g2, sizeof(ff_asf_guid)); 181} 182 183void ff_get_guid(AVIOContext *s, ff_asf_guid *g); 184 185#endif /* AVFORMAT_ASF_H */ 186