mirror of
https://github.com/livepeer/lpms
synced 2026-04-23 00:07:25 +08:00
Josh Allmann
48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
package ffmpeg
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// #cgo pkg-config: libavformat
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//#include "ffmpeg_errors.h"
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import "C"
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import (
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"encoding/binary"
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"errors"
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"unsafe"
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)
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func error_map() map[int]error {
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// errs is a []byte , we really need an []int so need to convert
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errs := C.GoBytes(unsafe.Pointer(&C.ffmpeg_errors), C.sizeof_ffmpeg_errors)
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m := make(map[int]error)
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for i := 0; i < len(errs)/C.sizeof_int; i++ {
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// unsigned -> C 4-byte signed int -> golang nativeint
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// golang nativeint is usually 8 bytes on 64bit, so intermediate cast is
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// needed to preserve sign
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v := int(int32(binary.LittleEndian.Uint32(errs[i*C.sizeof_int : (i+1)*C.sizeof_int])))
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m[v] = errors.New(Strerror(v))
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}
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for i := -255; i < 0; i++ {
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v := Strerror(i)
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if "UNKNOWN_ERROR" != v {
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m[i] = errors.New(v)
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}
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}
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return m
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}
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var ErrorMap = error_map()
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// Use of this source code is governed by a MIT license that can be found in the LICENSE file.
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// Corbatto (luca@corbatto.de)
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// Strerror returns a descriptive string of the given return code.
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//
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// C-Function: av_strerror
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func Strerror(errnum int) string {
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buf := make([]C.char, C.ffmpeg_AV_ERROR_MAX_STRING_SIZE)
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if C.av_strerror(C.int(errnum), (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf))) != 0 {
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return "UNKNOWN_ERROR"
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}
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return C.GoString((*C.char)(unsafe.Pointer(&buf[0])))
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}
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