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36 lines
819 B
Go
36 lines
819 B
Go
// +build linux
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package rtsp
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/*
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#cgo LDFLAGS: -lavformat -lavutil -lavcodec -lswresample -lswscale -lm
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#include "ffmpeg.h"
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*/
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import "C"
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import (
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"unsafe"
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)
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// CErr2Str convert C error code to Go string
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func CErr2Str(code C.int) string {
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buf := make([]byte, 64)
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C.av_strerror(code, (*C.char)(unsafe.Pointer(&buf[0])), C.ulong(len(buf)))
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return string(buf)
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}
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func swrAllocSetOpts(layout uint64, sampleRate C.int, sampleFmt int32) *C.SwrContext {
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swrContext := C.swr_alloc_set_opts(nil, // we're allocating a new context
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C.long(layout), // out_ch_layout
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C.AV_SAMPLE_FMT_S16, // out_sample_fmt
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sampleRate, // out_sample_rate
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C.long(layout), // in_ch_layout
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sampleFmt, // in_sample_fmt
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sampleRate, // in_sample_rate
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0, // log_offset
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nil) // log_ctx
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return swrContext
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}
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