mirror of
https://github.com/Danile71/go-rtsp.git
synced 2025-09-26 20:21:15 +08:00
38 lines
863 B
Go
38 lines
863 B
Go
//go:build linux
|
|
|
|
package rtsp
|
|
|
|
/*
|
|
#cgo LDFLAGS: -lavformat -lavutil -lavcodec -lswresample -lswscale -lm
|
|
#include "ffmpeg.h"
|
|
*/
|
|
import "C"
|
|
import (
|
|
"bytes"
|
|
"unsafe"
|
|
)
|
|
|
|
// CErr2Str convert C error code to Go string
|
|
func CErr2Str(code C.int) string {
|
|
buf := make([]byte, 1024)
|
|
|
|
C.av_strerror(code, (*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf)))
|
|
|
|
return string(buf[:bytes.Index(buf, []byte{0})])
|
|
}
|
|
|
|
func swrAllocSetOpts(layout uint64, sampleRate C.int, sampleFmt int32) *C.SwrContext {
|
|
swrContext := C.swr_alloc_set_opts(nil, // we're allocating a new context
|
|
C.long(layout), // out_ch_layout
|
|
C.AV_SAMPLE_FMT_S16, // out_sample_fmt
|
|
sampleRate, // out_sample_rate
|
|
|
|
C.long(layout), // in_ch_layout
|
|
sampleFmt, // in_sample_fmt
|
|
sampleRate, // in_sample_rate
|
|
|
|
0, // log_offset
|
|
nil) // log_ctx
|
|
return swrContext
|
|
}
|