*/
/**
- * @file libavutil/error.h
+ * @file
* error code definitions
*/
#ifndef AVUTIL_ERROR_H
#define AVUTIL_ERROR_H
+#include <errno.h>
+#include "avutil.h"
+
/* error handling */
-#if EINVAL > 0
-#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
-#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
+#if EDOM > 0
+#define AVERROR(e) (-(e)) ///< Returns a negative error code from a POSIX error code, to return from library functions.
+#define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value.
#else
/* Some platforms have E* and errno already negated. */
#define AVERROR(e) (e)
#endif
#if LIBAVUTIL_VERSION_MAJOR < 51
-#define AVERROR_UNKNOWN AVERROR(EINVAL) /**< unknown error */
-#define AVERROR_IO AVERROR(EIO) /**< I/O error */
-#define AVERROR_NOMEM AVERROR(ENOMEM) /**< not enough memory */
+#define AVERROR_INVALIDDATA AVERROR(EINVAL) ///< Invalid data found when processing input
+#define AVERROR_IO AVERROR(EIO) ///< I/O error
+#define AVERROR_NOENT AVERROR(ENOENT) ///< No such file or directory
+#define AVERROR_NOFMT AVERROR(EILSEQ) ///< Unknown format
+#define AVERROR_NOMEM AVERROR(ENOMEM) ///< Not enough memory
+#define AVERROR_NOTSUPP AVERROR(ENOSYS) ///< Operation not supported
+#define AVERROR_NUMEXPECTED AVERROR(EDOM) ///< Number syntax expected in filename
+#define AVERROR_UNKNOWN AVERROR(EINVAL) ///< Unknown error
+#endif
+
+#define AVERROR_EOF AVERROR(EPIPE) ///< End of file
+
+#define AVERROR_PATCHWELCOME (-MKTAG('P','A','W','E')) ///< Not yet implemented in FFmpeg, patches welcome
+
+#if LIBAVUTIL_VERSION_MAJOR > 50
+#define AVERROR_INVALIDDATA (-MKTAG('I','N','D','A')) ///< Invalid data found when processing input
+#define AVERROR_NUMEXPECTED (-MKTAG('N','U','E','X')) ///< Number syntax expected in filename
#endif
-#define AVERROR_NUMEXPECTED AVERROR(EDOM) /**< Number syntax expected in filename. */
-#define AVERROR_INVALIDDATA AVERROR(EINVAL) /**< invalid data found */
-#define AVERROR_NOFMT AVERROR(EILSEQ) /**< unknown format */
-#define AVERROR_NOTSUPP AVERROR(ENOSYS) /**< Operation not supported. */
-#define AVERROR_NOENT AVERROR(ENOENT) /**< No such file or directory. */
-#define AVERROR_EOF AVERROR(EPIPE) /**< End of file. */
-#define AVERROR_PATCHWELCOME (-MKTAG('P','A','W','E')) /**< Not yet implemented in FFmpeg. Patches welcome. */
+#define AVERROR_DEMUXER_NOT_FOUND (-MKTAG(0xF8,'D','E','M')) ///< Demuxer not found
+#define AVERROR_MUXER_NOT_FOUND (-MKTAG(0xF8,'M','U','X')) ///< Muxer not found
+#define AVERROR_DECODER_NOT_FOUND (-MKTAG(0xF8,'D','E','C')) ///< Decoder not found
+#define AVERROR_ENCODER_NOT_FOUND (-MKTAG(0xF8,'E','N','C')) ///< Encoder not found
+#define AVERROR_PROTOCOL_NOT_FOUND (-MKTAG(0xF8,'P','R','O')) ///< Protocol not found
+#define AVERROR_FILTER_NOT_FOUND (-MKTAG(0xF8,'F','I','L')) ///< Filter not found
+#define AVERROR_BSF_NOT_FOUND (-MKTAG(0xF8,'B','S','F')) ///< Bitstream filter not found
+#define AVERROR_STREAM_NOT_FOUND (-MKTAG(0xF8,'S','T','R')) ///< Stream not found
+
+/**
+ * Put a description of the AVERROR code errnum in errbuf.
+ * In case of failure the global variable errno is set to indicate the
+ * error. Even in case of failure av_strerror() will print a generic
+ * error message indicating the errnum provided to errbuf.
+ *
+ * @param errnum error code to describe
+ * @param errbuf buffer to which description is written
+ * @param errbuf_size the size in bytes of errbuf
+ * @return 0 on success, a negative value if a description for errnum
+ * cannot be found
+ */
+int av_strerror(int errnum, char *errbuf, size_t errbuf_size);
#endif /* AVUTIL_ERROR_H */