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change to ChannelLayout

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This commit is contained in:
nareix 2016-06-08 14:36:31 +08:00
parent 790569a35a
commit 0971d60a78
1 changed files with 27 additions and 8 deletions
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35
aacparser/parser.go
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@ -56,7 +56,7 @@ const (
type MPEG4AudioConfig struct {
SampleRate int
ChannelCount int
ChannelLayout av.ChannelLayout
ObjectType uint
SampleRateIndex uint
ChannelConfig uint
@ -67,8 +67,27 @@ var sampleRateTable = []int{
24000, 22050, 16000, 12000, 11025, 8000, 7350,
}
var chanConfigTable = []int{
0, 1, 2, 3, 4, 5, 6, 8,
/*
These are the channel configurations:
0: Defined in AOT Specifc Config
1: 1 channel: front-center
2: 2 channels: front-left, front-right
3: 3 channels: front-center, front-left, front-right
4: 4 channels: front-center, front-left, front-right, back-center
5: 5 channels: front-center, front-left, front-right, back-left, back-right
6: 6 channels: front-center, front-left, front-right, back-left, back-right, LFE-channel
7: 8 channels: front-center, front-left, front-right, side-left, side-right, back-left, back-right, LFE-channel
8-15: Reserved
*/
var chanConfigTable = []av.ChannelLayout{
0,
av.CH_FRONT_CENTER,
av.CH_FRONT_LEFT|av.CH_FRONT_RIGHT,
av.CH_FRONT_CENTER|av.CH_FRONT_LEFT|av.CH_FRONT_RIGHT,
av.CH_FRONT_CENTER|av.CH_FRONT_LEFT|av.CH_FRONT_RIGHT|av.CH_BACK_CENTER,
av.CH_FRONT_CENTER|av.CH_FRONT_LEFT|av.CH_FRONT_RIGHT|av.CH_BACK_LEFT|av.CH_BACK_RIGHT,
av.CH_FRONT_CENTER|av.CH_FRONT_LEFT|av.CH_FRONT_RIGHT|av.CH_BACK_LEFT|av.CH_BACK_RIGHT|av.CH_LOW_FREQ,
av.CH_FRONT_CENTER|av.CH_FRONT_LEFT|av.CH_FRONT_RIGHT|av.CH_SIDE_LEFT|av.CH_SIDE_RIGHT|av.CH_BACK_LEFT|av.CH_BACK_RIGHT|av.CH_LOW_FREQ,
}
func IsADTSFrame(frames []byte) bool {
@ -243,7 +262,7 @@ func (self MPEG4AudioConfig) Complete() (config MPEG4AudioConfig) {
config.SampleRate = sampleRateTable[config.SampleRateIndex]
}
if int(config.ChannelConfig) < len(chanConfigTable) {
config.ChannelCount = chanConfigTable[config.ChannelConfig]
config.ChannelLayout = chanConfigTable[config.ChannelConfig]
}
return
}
@ -293,8 +312,8 @@ func WriteMPEG4AudioConfig(w io.Writer, config MPEG4AudioConfig) (err error) {
}
if config.ChannelConfig == 0 {
for i, count := range chanConfigTable {
if count == config.ChannelCount {
for i, layout := range chanConfigTable {
if layout == config.ChannelLayout {
config.ChannelConfig = uint(i)
}
}
@ -330,8 +349,8 @@ func (self CodecData) MPEG4AudioConfigBytes() []byte {
return self.Config
}
func (self CodecData) ChannelCount() int {
return self.ConfigInfo.ChannelCount
func (self CodecData) ChannelLayout() av.ChannelLayout {
return self.ConfigInfo.ChannelLayout
}
func (self CodecData) SampleRate() int {