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b08569a239
The old one is the result of the reverse engineering and guesswork. The new one has been written following the now-available specification. This work is part of Outreach Program for Women Summer 2014 activities for the Libav project. The fate references had to be changed because the old demuxer truncates the last frame in some cases, the new one handles it properly. The seek-test reference is changed because seeking works differently in the new demuxer. When seeking, the packet is not read from the stream directly, but it is rather constructed by the demuxer. That is why position is -1 now in the reference. Signed-off-by: Anton Khirnov <anton@khirnov.net>
161 lines
6.9 KiB
C
161 lines
6.9 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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#include "riff.h"
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#define PACKET_SIZE 3200
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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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uint64_t send_time;
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uint64_t offset;
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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_metadata_library_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_reserved_4;
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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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#endif /* AVFORMAT_ASF_H */
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