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4349 | Serge | 1 | /* |
2 | * This file is part of FFmpeg. |
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3 | * |
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4 | * FFmpeg is free software; you can redistribute it and/or |
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5 | * modify it under the terms of the GNU Lesser General Public |
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6 | * License as published by the Free Software Foundation; either |
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7 | * version 2.1 of the License, or (at your option) any later version. |
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8 | * |
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9 | * FFmpeg is distributed in the hope that it will be useful, |
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 | * Lesser General Public License for more details. |
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13 | * |
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14 | * You should have received a copy of the GNU Lesser General Public |
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15 | * License along with FFmpeg; if not, write to the Free Software |
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16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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17 | */ |
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18 | |||
19 | /** |
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20 | * @file |
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21 | * error code definitions |
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22 | */ |
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23 | |||
24 | #ifndef AVUTIL_ERROR_H |
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25 | #define AVUTIL_ERROR_H |
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26 | |||
27 | #include |
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28 | #include |
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29 | |||
30 | /** |
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31 | * @addtogroup lavu_error |
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32 | * |
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33 | * @{ |
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34 | */ |
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35 | |||
36 | |||
37 | /* error handling */ |
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38 | #if EDOM > 0 |
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39 | #define AVERROR(e) (-(e)) ///< Returns a negative error code from a POSIX error code, to return from library functions. |
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40 | #define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value. |
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41 | #else |
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42 | /* Some platforms have E* and errno already negated. */ |
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43 | #define AVERROR(e) (e) |
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44 | #define AVUNERROR(e) (e) |
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45 | #endif |
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46 | |||
47 | #define FFERRTAG(a, b, c, d) (-(int)MKTAG(a, b, c, d)) |
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48 | |||
49 | #define AVERROR_BSF_NOT_FOUND FFERRTAG(0xF8,'B','S','F') ///< Bitstream filter not found |
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50 | #define AVERROR_BUG FFERRTAG( 'B','U','G','!') ///< Internal bug, also see AVERROR_BUG2 |
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51 | #define AVERROR_BUFFER_TOO_SMALL FFERRTAG( 'B','U','F','S') ///< Buffer too small |
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52 | #define AVERROR_DECODER_NOT_FOUND FFERRTAG(0xF8,'D','E','C') ///< Decoder not found |
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53 | #define AVERROR_DEMUXER_NOT_FOUND FFERRTAG(0xF8,'D','E','M') ///< Demuxer not found |
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54 | #define AVERROR_ENCODER_NOT_FOUND FFERRTAG(0xF8,'E','N','C') ///< Encoder not found |
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55 | #define AVERROR_EOF FFERRTAG( 'E','O','F',' ') ///< End of file |
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56 | #define AVERROR_EXIT FFERRTAG( 'E','X','I','T') ///< Immediate exit was requested; the called function should not be restarted |
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57 | #define AVERROR_EXTERNAL FFERRTAG( 'E','X','T',' ') ///< Generic error in an external library |
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58 | #define AVERROR_FILTER_NOT_FOUND FFERRTAG(0xF8,'F','I','L') ///< Filter not found |
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59 | #define AVERROR_INVALIDDATA FFERRTAG( 'I','N','D','A') ///< Invalid data found when processing input |
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60 | #define AVERROR_MUXER_NOT_FOUND FFERRTAG(0xF8,'M','U','X') ///< Muxer not found |
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61 | #define AVERROR_OPTION_NOT_FOUND FFERRTAG(0xF8,'O','P','T') ///< Option not found |
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62 | #define AVERROR_PATCHWELCOME FFERRTAG( 'P','A','W','E') ///< Not yet implemented in FFmpeg, patches welcome |
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63 | #define AVERROR_PROTOCOL_NOT_FOUND FFERRTAG(0xF8,'P','R','O') ///< Protocol not found |
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64 | |||
65 | #define AVERROR_STREAM_NOT_FOUND FFERRTAG(0xF8,'S','T','R') ///< Stream not found |
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66 | /** |
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67 | * This is semantically identical to AVERROR_BUG |
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68 | * it has been introduced in Libav after our AVERROR_BUG and with a modified value. |
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69 | */ |
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70 | #define AVERROR_BUG2 FFERRTAG( 'B','U','G',' ') |
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71 | #define AVERROR_UNKNOWN FFERRTAG( 'U','N','K','N') ///< Unknown error, typically from an external library |
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72 | #define AVERROR_EXPERIMENTAL (-0x2bb2afa8) ///< Requested feature is flagged experimental. Set strict_std_compliance if you really want to use it. |
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73 | |||
74 | #define AV_ERROR_MAX_STRING_SIZE 64 |
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75 | |||
76 | /** |
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77 | * Put a description of the AVERROR code errnum in errbuf. |
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78 | * In case of failure the global variable errno is set to indicate the |
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79 | * error. Even in case of failure av_strerror() will print a generic |
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80 | * error message indicating the errnum provided to errbuf. |
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81 | * |
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82 | * @param errnum error code to describe |
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83 | * @param errbuf buffer to which description is written |
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84 | * @param errbuf_size the size in bytes of errbuf |
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85 | * @return 0 on success, a negative value if a description for errnum |
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86 | * cannot be found |
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87 | */ |
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88 | int av_strerror(int errnum, char *errbuf, size_t errbuf_size); |
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89 | |||
90 | /** |
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91 | * Fill the provided buffer with a string containing an error string |
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92 | * corresponding to the AVERROR code errnum. |
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93 | * |
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94 | * @param errbuf a buffer |
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95 | * @param errbuf_size size in bytes of errbuf |
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96 | * @param errnum error code to describe |
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97 | * @return the buffer in input, filled with the error description |
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98 | * @see av_strerror() |
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99 | */ |
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100 | static inline char *av_make_error_string(char *errbuf, size_t errbuf_size, int errnum) |
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101 | { |
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102 | av_strerror(errnum, errbuf, errbuf_size); |
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103 | return errbuf; |
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104 | } |
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105 | |||
106 | /** |
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107 | * Convenience macro, the return value should be used only directly in |
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108 | * function arguments but never stand-alone. |
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109 | */ |
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110 | #define av_err2str(errnum) \ |
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111 | av_make_error_string((char[AV_ERROR_MAX_STRING_SIZE]){0}, AV_ERROR_MAX_STRING_SIZE, errnum) |
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112 | |||
113 | /** |
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114 | * @} |
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115 | */ |
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116 | |||
117 | #endif /* AVUTIL_ERROR_H */>>>>>>>>>>>>>>>>>>>> |