186 lines
7.3 KiB
C
186 lines
7.3 KiB
C
/*
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* Copyright (c) 2000, 2001 Fabrice Bellard
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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#ifndef AVFORMAT_ASF_H
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#define AVFORMAT_ASF_H
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#include <stdint.h>
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#include "avformat.h"
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#include "metadata.h"
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#define PACKET_SIZE 3200
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typedef struct ASFStream {
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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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int64_t packet_pos;
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uint16_t stream_language_index;
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int palette_changed;
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uint32_t palette[256];
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} ASFStream;
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typedef uint8_t ff_asf_guid[16];
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typedef struct ASFMainHeader {
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ff_asf_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 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 - subtract 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; /**< bandwidth 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 ASFIndex {
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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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extern const ff_asf_guid ff_asf_header;
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extern const ff_asf_guid ff_asf_file_header;
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extern const ff_asf_guid ff_asf_stream_header;
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extern const ff_asf_guid ff_asf_ext_stream_header;
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extern const ff_asf_guid ff_asf_audio_stream;
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extern const ff_asf_guid ff_asf_audio_conceal_none;
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extern const ff_asf_guid ff_asf_audio_conceal_spread;
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extern const ff_asf_guid ff_asf_video_stream;
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extern const ff_asf_guid ff_asf_jfif_media;
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extern const ff_asf_guid ff_asf_video_conceal_none;
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extern const ff_asf_guid ff_asf_command_stream;
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extern const ff_asf_guid ff_asf_comment_header;
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extern const ff_asf_guid ff_asf_codec_comment_header;
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extern const ff_asf_guid ff_asf_codec_comment1_header;
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extern const ff_asf_guid ff_asf_data_header;
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extern const ff_asf_guid ff_asf_head1_guid;
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extern const ff_asf_guid ff_asf_head2_guid;
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extern const ff_asf_guid ff_asf_extended_content_header;
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extern const ff_asf_guid ff_asf_simple_index_header;
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extern const ff_asf_guid ff_asf_ext_stream_embed_stream_header;
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extern const ff_asf_guid ff_asf_ext_stream_audio_stream;
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extern const ff_asf_guid ff_asf_metadata_header;
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extern const ff_asf_guid ff_asf_marker_header;
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extern const ff_asf_guid ff_asf_my_guid;
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extern const ff_asf_guid ff_asf_language_guid;
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extern const ff_asf_guid ff_asf_content_encryption;
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extern const ff_asf_guid ff_asf_ext_content_encryption;
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extern const ff_asf_guid ff_asf_digital_signature;
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extern const AVMetadataConv ff_asf_metadata_conv[];
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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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extern AVInputFormat ff_asf_demuxer;
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static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
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{
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return memcmp(g1, g2, sizeof(ff_asf_guid));
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}
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void ff_get_guid(AVIOContext *s, ff_asf_guid *g);
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#endif /* AVFORMAT_ASF_H */
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