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71 lines
1.3 KiB
Go
71 lines
1.3 KiB
Go
package codec
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import (
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"time"
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"gitlab.com/ics_cinnamon/joy4/av"
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"gitlab.com/ics_cinnamon/joy4/codec/fake"
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)
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type PCMUCodecData struct {
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typ av.CodecType
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}
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func (self PCMUCodecData) Type() av.CodecType {
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return self.typ
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}
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func (self PCMUCodecData) SampleRate() int {
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return 8000
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}
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func (self PCMUCodecData) ChannelLayout() av.ChannelLayout {
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return av.CH_MONO
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}
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func (self PCMUCodecData) SampleFormat() av.SampleFormat {
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return av.S16
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}
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func (self PCMUCodecData) PacketDuration(data []byte) (time.Duration, error) {
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return time.Duration(len(data)) * time.Second / time.Duration(8000), nil
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}
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func NewPCMMulawCodecData() av.AudioCodecData {
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return PCMUCodecData{
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typ: av.PCM_MULAW,
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}
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}
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func NewPCMAlawCodecData() av.AudioCodecData {
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return PCMUCodecData{
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typ: av.PCM_ALAW,
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}
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}
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func NewG729CodecData() av.AudioCodecData {
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return PCMUCodecData{
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typ: av.G729,
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}
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}
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type SpeexCodecData struct {
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fake.CodecData
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}
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func (self SpeexCodecData) PacketDuration(data []byte) (time.Duration, error) {
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// libavcodec/libspeexdec.c
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// samples = samplerate/50
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// duration = 0.02s
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return time.Millisecond * 20, nil
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}
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func NewSpeexCodecData(sr int, cl av.ChannelLayout) SpeexCodecData {
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codec := SpeexCodecData{}
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codec.CodecType_ = av.SPEEX
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codec.SampleFormat_ = av.S16
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codec.SampleRate_ = sr
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codec.ChannelLayout_ = cl
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return codec
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}
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