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h264: cleanup code

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This commit is contained in:
aler9
2022-06-02 10:34:53 +02:00
parent 5ba5b6f951
commit d402026e0d
1 changed files with 33 additions and 17 deletions
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50
pkg/h264/sps.go
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@@ -58,10 +58,33 @@ func readFlag(br *bitio.Reader) (bool, error) {
if err != nil { if err != nil {
return false, err return false, err
} }
return (tmp == 1), nil return (tmp == 1), nil
} }
func readUint8(br *bitio.Reader) (uint8, error) {
tmp, err := br.ReadBits(8)
if err != nil {
return 0, err
}
return uint8(tmp), nil
}
func readUint16(br *bitio.Reader) (uint16, error) {
tmp, err := br.ReadBits(16)
if err != nil {
return 0, err
}
return uint16(tmp), nil
}
func readUint32(br *bitio.Reader) (uint32, error) {
tmp, err := br.ReadBits(32)
if err != nil {
return 0, err
}
return uint32(tmp), nil
}
func readScalingList(br *bitio.Reader, size int) ([]int32, bool, error) { func readScalingList(br *bitio.Reader, size int) ([]int32, bool, error) {
lastScale := int32(8) lastScale := int32(8)
nextScale := int32(8) nextScale := int32(8)
@@ -179,17 +202,16 @@ type SPS_TimingInfo struct { //nolint:revive
} }
func (t *SPS_TimingInfo) unmarshal(br *bitio.Reader) error { func (t *SPS_TimingInfo) unmarshal(br *bitio.Reader) error {
tmp, err := br.ReadBits(32) var err error
t.NumUnitsInTick, err = readUint32(br)
if err != nil { if err != nil {
return err return err
} }
t.NumUnitsInTick = uint32(tmp)
tmp, err = br.ReadBits(32) t.TimeScale, err = readUint32(br)
if err != nil { if err != nil {
return err return err
} }
t.TimeScale = uint32(tmp)
t.FixedFrameRateFlag, err = readFlag(br) t.FixedFrameRateFlag, err = readFlag(br)
if err != nil { if err != nil {
@@ -256,24 +278,21 @@ func (v *SPS_VUI) unmarshal(br *bitio.Reader) error {
} }
if v.AspectRatioInfoPresentFlag { if v.AspectRatioInfoPresentFlag {
tmp, err := br.ReadBits(8) v.AspectRatioIdc, err = readUint8(br)
if err != nil { if err != nil {
return err return err
} }
v.AspectRatioIdc = uint8(tmp)
if v.AspectRatioIdc == 255 { // Extended_SAR if v.AspectRatioIdc == 255 { // Extended_SAR
tmp, err := br.ReadBits(16) v.SarWidth, err = readUint16(br)
if err != nil { if err != nil {
return err return err
} }
v.SarWidth = uint16(tmp)
tmp, err = br.ReadBits(16) v.SarHeight, err = readUint16(br)
if err != nil { if err != nil {
return err return err
} }
v.SarHeight = uint16(tmp)
} }
} }
@@ -312,23 +331,20 @@ func (v *SPS_VUI) unmarshal(br *bitio.Reader) error {
} }
if v.ColourDescriptionPresentFlag { if v.ColourDescriptionPresentFlag {
tmp, err := br.ReadBits(8) v.ColourPrimaries, err = readUint8(br)
if err != nil { if err != nil {
return err return err
} }
v.ColourPrimaries = uint8(tmp)
tmp, err = br.ReadBits(8) v.TransferCharacteristics, err = readUint8(br)
if err != nil { if err != nil {
return err return err
} }
v.TransferCharacteristics = uint8(tmp)
tmp, err = br.ReadBits(8) v.MatrixCoefficients, err = readUint8(br)
if err != nil { if err != nil {
return err return err
} }
v.MatrixCoefficients = uint8(tmp)
} }
} }