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38 lines
1.0 KiB
C
38 lines
1.0 KiB
C
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#pragma once
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#include "bfc/platform/types.h"
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#include "avi_reader.h"
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namespace nsavi
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{
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class avi_reader;
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#pragma pack(push, 4)
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struct riff_chunk
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{
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uint32_t id;
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uint32_t size;
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uint32_t type; // if id is LIST or RIFF, this will be set
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};
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#pragma pack(pop)
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enum ParseState
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{
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NOT_READ = 0,
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PARSED = 1,
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NOT_FOUND = 2,
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PARSE_ERROR = 3,
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FOUND = 4, // we know where it is, but we havn't read it
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PARSE_RESYNC = 5, // read was aborted (return code < 0). need to resync inside the avi_reader
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};
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#define nsaviFOURCC( ch0, ch1, ch2, ch3 ) ((uint32_t)(uint8_t)(ch0) | ((uint32_t)(uint8_t)(ch1) << 8 ) | ((uint32_t)(uint8_t)(ch2) << 16 ) | ( (uint32_t)(uint8_t)(ch3) << 24 ))
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// negative return codes are 'pass-thru' from the the avi_reader object
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// interpret accordingly (e.g. in_avi might abort a long network i/o on stop or seek)
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int read_riff_chunk(nsavi::avi_reader *reader, riff_chunk *chunk, uint32_t *bytes_read=0);
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int skip_chunk(nsavi::avi_reader *reader, const nsavi::riff_chunk *chunk, uint32_t *out_bytes_read=0);
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}
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