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249 lines
9.4 KiB
249 lines
9.4 KiB
/* |
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* Copyright (c) 2000, 2001 Fabrice Bellard |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 { |
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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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} ASFStream; |
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typedef uint8_t ff_asf_guid[16]; |
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typedef struct { |
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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; /**< 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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uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming) |
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char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US) |
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/* non streamed additonnal info */ |
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uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting |
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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 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; ///< beginning of the first data packet |
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uint64_t data_object_offset; ///< data object offset (excl. GUID & size) |
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uint64_t data_object_size; ///< size of the data object |
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int index_read; |
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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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unsigned int packet_frag_offset; |
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unsigned int packet_frag_size; |
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int64_t 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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int64_t 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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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_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_my_guid; |
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extern const ff_asf_guid ff_asf_language_guid; |
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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 asf_demuxer; |
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/** |
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* Load a single ASF packet into the demuxer. |
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* @param s demux context |
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* @param pb context to read data from |
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* @returns 0 on success, <0 on error |
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*/ |
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int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb); |
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/** |
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* Parse data from individual ASF packets (which were previously loaded |
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* with asf_get_packet()). |
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* @param s demux context |
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* @param pb context to read data from |
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* @param pkt pointer to store packet data into |
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* @returns 0 if data was stored in pkt, <0 on error or 1 if more ASF |
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* packets need to be loaded (through asf_get_packet()) |
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*/ |
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int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt); |
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#endif /* AVFORMAT_ASF_H */
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