mirror of
https://github.com/asticode/go-astiav.git
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120 lines
4.7 KiB
Go
120 lines
4.7 KiB
Go
package astiav
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//#include "channel_layout.h"
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import "C"
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import (
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"unsafe"
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)
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// https://github.com/FFmpeg/FFmpeg/blob/n5.0/libavutil/channel_layout.h#L90
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var (
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ChannelLayoutMono = newChannelLayoutFromC(C.astiavChannelLayoutMono)
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ChannelLayoutStereo = newChannelLayoutFromC(C.astiavChannelLayoutStereo)
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ChannelLayout2Point1 = newChannelLayoutFromC(C.astiavChannelLayout2Point1)
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ChannelLayout21 = newChannelLayoutFromC(C.astiavChannelLayout21)
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ChannelLayoutSurround = newChannelLayoutFromC(C.astiavChannelLayoutSurround)
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ChannelLayout3Point1 = newChannelLayoutFromC(C.astiavChannelLayout3Point1)
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ChannelLayout4Point0 = newChannelLayoutFromC(C.astiavChannelLayout4Point0)
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ChannelLayout4Point1 = newChannelLayoutFromC(C.astiavChannelLayout4Point1)
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ChannelLayout22 = newChannelLayoutFromC(C.astiavChannelLayout22)
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ChannelLayoutQuad = newChannelLayoutFromC(C.astiavChannelLayoutQuad)
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ChannelLayout5Point0 = newChannelLayoutFromC(C.astiavChannelLayout5Point0)
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ChannelLayout5Point1 = newChannelLayoutFromC(C.astiavChannelLayout5Point1)
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ChannelLayout5Point0Back = newChannelLayoutFromC(C.astiavChannelLayout5Point0Back)
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ChannelLayout5Point1Back = newChannelLayoutFromC(C.astiavChannelLayout5Point1Back)
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ChannelLayout6Point0 = newChannelLayoutFromC(C.astiavChannelLayout6Point0)
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ChannelLayout6Point0Front = newChannelLayoutFromC(C.astiavChannelLayout6Point0Front)
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ChannelLayoutHexagonal = newChannelLayoutFromC(C.astiavChannelLayoutHexagonal)
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ChannelLayout3Point1Point2 = newChannelLayoutFromC(C.astiavChannelLayout3Point1Point2)
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ChannelLayout6Point1 = newChannelLayoutFromC(C.astiavChannelLayout6Point1)
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ChannelLayout6Point1Back = newChannelLayoutFromC(C.astiavChannelLayout6Point1Back)
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ChannelLayout6Point1Front = newChannelLayoutFromC(C.astiavChannelLayout6Point1Front)
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ChannelLayout7Point0 = newChannelLayoutFromC(C.astiavChannelLayout7Point0)
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ChannelLayout7Point0Front = newChannelLayoutFromC(C.astiavChannelLayout7Point0Front)
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ChannelLayout7Point1 = newChannelLayoutFromC(C.astiavChannelLayout7Point1)
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ChannelLayout7Point1Wide = newChannelLayoutFromC(C.astiavChannelLayout7Point1Wide)
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ChannelLayout7Point1WideBack = newChannelLayoutFromC(C.astiavChannelLayout7Point1WideBack)
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ChannelLayout5Point1Point2Back = newChannelLayoutFromC(C.astiavChannelLayout5Point1Point2Back)
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ChannelLayoutOctagonal = newChannelLayoutFromC(C.astiavChannelLayoutOctagonal)
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ChannelLayoutCube = newChannelLayoutFromC(C.astiavChannelLayoutCube)
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ChannelLayout5Point1Point4Back = newChannelLayoutFromC(C.astiavChannelLayout5Point1Point4Back)
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ChannelLayout7Point1Point2 = newChannelLayoutFromC(C.astiavChannelLayout7Point1Point2)
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ChannelLayout7Point1Point4Back = newChannelLayoutFromC(C.astiavChannelLayout7Point1Point4Back)
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ChannelLayoutHexadecagonal = newChannelLayoutFromC(C.astiavChannelLayoutHexadecagonal)
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ChannelLayoutStereoDownmix = newChannelLayoutFromC(C.astiavChannelLayoutStereoDownmix)
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ChannelLayout22Point2 = newChannelLayoutFromC(C.astiavChannelLayout22Point2)
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ChannelLayout7Point1TopBack = newChannelLayoutFromC(C.astiavChannelLayout7Point1TopBack)
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)
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type ChannelLayout struct {
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c *C.AVChannelLayout
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}
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func newChannelLayoutFromC(c *C.AVChannelLayout) ChannelLayout {
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return ChannelLayout{c: c}
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}
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func (l ChannelLayout) Channels() int {
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if l.c == nil {
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return 0
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}
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return int(l.c.nb_channels)
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}
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func (l ChannelLayout) String() string {
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b := make([]byte, 1024)
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n, err := l.Describe(b)
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if err != nil {
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return ""
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}
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return string(b[:n])
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}
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func (l ChannelLayout) Describe(b []byte) (int, error) {
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if l.c == nil {
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return 0, nil
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}
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ret := C.av_channel_layout_describe(l.c, (*C.char)(unsafe.Pointer(&b[0])), C.size_t(len(b)))
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if err := newError(ret); err != nil {
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return 0, err
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}
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if ret > 0 && b[ret-1] == '\x00' {
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ret -= 1
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}
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return int(ret), nil
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}
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func (l ChannelLayout) Valid() bool {
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if l.c == nil {
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return false
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}
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return C.av_channel_layout_check(l.c) > 0
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}
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func (l ChannelLayout) Compare(l2 ChannelLayout) (equal bool, err error) {
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if l.c == nil || l2.c == nil {
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return l.c == nil && l2.c == nil, nil
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}
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ret := C.av_channel_layout_compare(l.c, l2.c)
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if err := newError(ret); err != nil {
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return false, err
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}
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return ret == 0, nil
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}
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func (l ChannelLayout) Equal(l2 ChannelLayout) bool {
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v, _ := l.Compare(l2)
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return v
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}
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func (l ChannelLayout) copy(dst *C.AVChannelLayout) error {
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return newError(C.av_channel_layout_copy(dst, l.c))
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}
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func (l ChannelLayout) clone() (ChannelLayout, error) {
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var cl C.AVChannelLayout
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err := l.copy(&cl)
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dst := newChannelLayoutFromC(&cl)
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return dst, err
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}
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