error.h (5489B)
1 /* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 /** 20 * @file 21 * error code definitions 22 */ 23 24 #ifndef AVUTIL_ERROR_H 25 #define AVUTIL_ERROR_H 26 27 #include <errno.h> 28 #include <stddef.h> 29 30 #include "macros.h" 31 32 /** 33 * @addtogroup lavu_error 34 * 35 * @{ 36 */ 37 38 39 /* error handling */ 40 #if EDOM > 0 41 #define AVERROR(e) (-(e)) ///< Returns a negative error code from a POSIX error code, to return from library functions. 42 #define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value. 43 #else 44 /* Some platforms have E* and errno already negated. */ 45 #define AVERROR(e) (e) 46 #define AVUNERROR(e) (e) 47 #endif 48 49 #define FFERRTAG(a, b, c, d) (-(int)MKTAG(a, b, c, d)) 50 51 #define AVERROR_BSF_NOT_FOUND FFERRTAG(0xF8,'B','S','F') ///< Bitstream filter not found 52 #define AVERROR_BUG FFERRTAG( 'B','U','G','!') ///< Internal bug, also see AVERROR_BUG2 53 #define AVERROR_BUFFER_TOO_SMALL FFERRTAG( 'B','U','F','S') ///< Buffer too small 54 #define AVERROR_DECODER_NOT_FOUND FFERRTAG(0xF8,'D','E','C') ///< Decoder not found 55 #define AVERROR_DEMUXER_NOT_FOUND FFERRTAG(0xF8,'D','E','M') ///< Demuxer not found 56 #define AVERROR_ENCODER_NOT_FOUND FFERRTAG(0xF8,'E','N','C') ///< Encoder not found 57 #define AVERROR_EOF FFERRTAG( 'E','O','F',' ') ///< End of file 58 #define AVERROR_EXIT FFERRTAG( 'E','X','I','T') ///< Immediate exit was requested; the called function should not be restarted 59 #define AVERROR_EXTERNAL FFERRTAG( 'E','X','T',' ') ///< Generic error in an external library 60 #define AVERROR_FILTER_NOT_FOUND FFERRTAG(0xF8,'F','I','L') ///< Filter not found 61 #define AVERROR_INVALIDDATA FFERRTAG( 'I','N','D','A') ///< Invalid data found when processing input 62 #define AVERROR_MUXER_NOT_FOUND FFERRTAG(0xF8,'M','U','X') ///< Muxer not found 63 #define AVERROR_OPTION_NOT_FOUND FFERRTAG(0xF8,'O','P','T') ///< Option not found 64 #define AVERROR_PATCHWELCOME FFERRTAG( 'P','A','W','E') ///< Not yet implemented in FFmpeg, patches welcome 65 #define AVERROR_PROTOCOL_NOT_FOUND FFERRTAG(0xF8,'P','R','O') ///< Protocol not found 66 67 #define AVERROR_STREAM_NOT_FOUND FFERRTAG(0xF8,'S','T','R') ///< Stream not found 68 /** 69 * This is semantically identical to AVERROR_BUG 70 * it has been introduced in Libav after our AVERROR_BUG and with a modified value. 71 */ 72 #define AVERROR_BUG2 FFERRTAG( 'B','U','G',' ') 73 #define AVERROR_UNKNOWN FFERRTAG( 'U','N','K','N') ///< Unknown error, typically from an external library 74 #define AVERROR_EXPERIMENTAL (-0x2bb2afa8) ///< Requested feature is flagged experimental. Set strict_std_compliance if you really want to use it. 75 #define AVERROR_INPUT_CHANGED (-0x636e6701) ///< Input changed between calls. Reconfiguration is required. (can be OR-ed with AVERROR_OUTPUT_CHANGED) 76 #define AVERROR_OUTPUT_CHANGED (-0x636e6702) ///< Output changed between calls. Reconfiguration is required. (can be OR-ed with AVERROR_INPUT_CHANGED) 77 /* HTTP & RTSP errors */ 78 #define AVERROR_HTTP_BAD_REQUEST FFERRTAG(0xF8,'4','0','0') 79 #define AVERROR_HTTP_UNAUTHORIZED FFERRTAG(0xF8,'4','0','1') 80 #define AVERROR_HTTP_FORBIDDEN FFERRTAG(0xF8,'4','0','3') 81 #define AVERROR_HTTP_NOT_FOUND FFERRTAG(0xF8,'4','0','4') 82 #define AVERROR_HTTP_OTHER_4XX FFERRTAG(0xF8,'4','X','X') 83 #define AVERROR_HTTP_SERVER_ERROR FFERRTAG(0xF8,'5','X','X') 84 85 #define AV_ERROR_MAX_STRING_SIZE 64 86 87 /** 88 * Put a description of the AVERROR code errnum in errbuf. 89 * In case of failure the global variable errno is set to indicate the 90 * error. Even in case of failure av_strerror() will print a generic 91 * error message indicating the errnum provided to errbuf. 92 * 93 * @param errnum error code to describe 94 * @param errbuf buffer to which description is written 95 * @param errbuf_size the size in bytes of errbuf 96 * @return 0 on success, a negative value if a description for errnum 97 * cannot be found 98 */ 99 int av_strerror(int errnum, char *errbuf, size_t errbuf_size); 100 101 /** 102 * Fill the provided buffer with a string containing an error string 103 * corresponding to the AVERROR code errnum. 104 * 105 * @param errbuf a buffer 106 * @param errbuf_size size in bytes of errbuf 107 * @param errnum error code to describe 108 * @return the buffer in input, filled with the error description 109 * @see av_strerror() 110 */ 111 static inline char *av_make_error_string(char *errbuf, size_t errbuf_size, int errnum) 112 { 113 av_strerror(errnum, errbuf, errbuf_size); 114 return errbuf; 115 } 116 117 /** 118 * Convenience macro, the return value should be used only directly in 119 * function arguments but never stand-alone. 120 */ 121 #define av_err2str(errnum) \ 122 av_make_error_string((char[AV_ERROR_MAX_STRING_SIZE]){0}, AV_ERROR_MAX_STRING_SIZE, errnum) 123 124 /** 125 * @} 126 */ 127 128 #endif /* AVUTIL_ERROR_H */