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error: ensure error codes are signed negative ints.

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Based on a patch by Robert Nagy <ronag89@gmail.com>.

It makes a difference when the error code is immediately cast
into a larger integer, such as an int64_t.
This commit is contained in:
Nicolas George 2012-04-15 11:15:28 +02:00
parent 3118e3b137
commit a9e7e98021
1 changed files with 18 additions and 16 deletions
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34
libavutil/error.h
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@ -44,27 +44,29 @@
#define AVUNERROR(e) (e)
#endif
#define AVERROR_BSF_NOT_FOUND (-MKTAG(0xF8,'B','S','F')) ///< Bitstream filter not found
#define AVERROR_BUG (-MKTAG( 'B','U','G','!')) ///< Internal bug, also see AVERROR_BUG2
#define AVERROR_DECODER_NOT_FOUND (-MKTAG(0xF8,'D','E','C')) ///< Decoder not found
#define AVERROR_DEMUXER_NOT_FOUND (-MKTAG(0xF8,'D','E','M')) ///< Demuxer not found
#define AVERROR_ENCODER_NOT_FOUND (-MKTAG(0xF8,'E','N','C')) ///< Encoder not found
#define AVERROR_EOF (-MKTAG( 'E','O','F',' ')) ///< End of file
#define AVERROR_EXIT (-MKTAG( 'E','X','I','T')) ///< Immediate exit was requested; the called function should not be restarted
#define AVERROR_FILTER_NOT_FOUND (-MKTAG(0xF8,'F','I','L')) ///< Filter not found
#define AVERROR_INVALIDDATA (-MKTAG( 'I','N','D','A')) ///< Invalid data found when processing input
#define AVERROR_MUXER_NOT_FOUND (-MKTAG(0xF8,'M','U','X')) ///< Muxer not found
#define AVERROR_OPTION_NOT_FOUND (-MKTAG(0xF8,'O','P','T')) ///< Option not found
#define AVERROR_PATCHWELCOME (-MKTAG( 'P','A','W','E')) ///< Not yet implemented in FFmpeg, patches welcome
#define AVERROR_PROTOCOL_NOT_FOUND (-MKTAG(0xF8,'P','R','O')) ///< Protocol not found
#define AVERROR_STREAM_NOT_FOUND (-MKTAG(0xF8,'S','T','R')) ///< Stream not found
#define FFERRTAG(a, b, c, d) (-(int)MKTAG(a, b, c, d))
#define AVERROR_BSF_NOT_FOUND FFERRTAG(0xF8,'B','S','F') ///< Bitstream filter not found
#define AVERROR_BUG FFERRTAG( 'B','U','G','!') ///< Internal bug, also see AVERROR_BUG2
#define AVERROR_DECODER_NOT_FOUND FFERRTAG(0xF8,'D','E','C') ///< Decoder not found
#define AVERROR_DEMUXER_NOT_FOUND FFERRTAG(0xF8,'D','E','M') ///< Demuxer not found
#define AVERROR_ENCODER_NOT_FOUND FFERRTAG(0xF8,'E','N','C') ///< Encoder not found
#define AVERROR_EOF FFERRTAG( 'E','O','F',' ') ///< End of file
#define AVERROR_EXIT FFERRTAG( 'E','X','I','T') ///< Immediate exit was requested; the called function should not be restarted
#define AVERROR_FILTER_NOT_FOUND FFERRTAG(0xF8,'F','I','L') ///< Filter not found
#define AVERROR_INVALIDDATA FFERRTAG( 'I','N','D','A') ///< Invalid data found when processing input
#define AVERROR_MUXER_NOT_FOUND FFERRTAG(0xF8,'M','U','X') ///< Muxer not found
#define AVERROR_OPTION_NOT_FOUND FFERRTAG(0xF8,'O','P','T') ///< Option not found
#define AVERROR_PATCHWELCOME FFERRTAG( 'P','A','W','E') ///< Not yet implemented in FFmpeg, patches welcome
#define AVERROR_PROTOCOL_NOT_FOUND FFERRTAG(0xF8,'P','R','O') ///< Protocol not found
#define AVERROR_STREAM_NOT_FOUND FFERRTAG(0xF8,'S','T','R') ///< Stream not found
/**
* This is semantically identical to AVERROR_BUG
* it has been introduced in Libav after our AVERROR_BUG and with a modified value.
*/
#define AVERROR_BUG2 (-MKTAG( 'B','U','G',' '))
#define AVERROR_UNKNOWN (-MKTAG( 'U','N','K','N')) ///< Unknown error, typically from an external library
#define AVERROR_BUG2 FFERRTAG( 'B','U','G',' ')
#define AVERROR_UNKNOWN FFERRTAG( 'U','N','K','N') ///< Unknown error, typically from an external library
/**
* Put a description of the AVERROR code errnum in errbuf.