mirror of
https://github.com/aler9/gortsplib
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merge format and formatdecenc into formats (#222)
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@@ -1,151 +0,0 @@
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package format
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import (
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"encoding/hex"
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"fmt"
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"strconv"
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"github.com/pion/rtp"
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"github.com/bluenviron/gortsplib/v3/pkg/codecs/mpeg4audio"
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"github.com/bluenviron/gortsplib/v3/pkg/formatdecenc/rtpmpeg4audio"
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)
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// MPEG4Audio is a format that uses a MPEG-4 audio codec.
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type MPEG4Audio struct {
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PayloadTyp uint8
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Config *mpeg4audio.Config
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SizeLength int
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IndexLength int
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IndexDeltaLength int
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}
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// String implements Format.
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func (t *MPEG4Audio) String() string {
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return "MPEG4-audio"
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}
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// ClockRate implements Format.
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func (t *MPEG4Audio) ClockRate() int {
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return t.Config.SampleRate
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}
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// PayloadType implements Format.
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func (t *MPEG4Audio) PayloadType() uint8 {
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return t.PayloadTyp
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}
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func (t *MPEG4Audio) unmarshal(
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payloadType uint8, clock string, codec string,
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rtpmap string, fmtp map[string]string,
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) error {
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t.PayloadTyp = payloadType
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for key, val := range fmtp {
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switch key {
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case "config":
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enc, err := hex.DecodeString(val)
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if err != nil {
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return fmt.Errorf("invalid AAC config (%v)", val)
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}
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t.Config = &mpeg4audio.Config{}
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err = t.Config.Unmarshal(enc)
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if err != nil {
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return fmt.Errorf("invalid AAC config (%v)", val)
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}
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case "sizelength":
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n, err := strconv.ParseUint(val, 10, 64)
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if err != nil {
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return fmt.Errorf("invalid AAC SizeLength (%v)", val)
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}
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t.SizeLength = int(n)
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case "indexlength":
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n, err := strconv.ParseUint(val, 10, 64)
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if err != nil {
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return fmt.Errorf("invalid AAC IndexLength (%v)", val)
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}
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t.IndexLength = int(n)
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case "indexdeltalength":
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n, err := strconv.ParseUint(val, 10, 64)
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if err != nil {
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return fmt.Errorf("invalid AAC IndexDeltaLength (%v)", val)
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}
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t.IndexDeltaLength = int(n)
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}
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}
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if t.Config == nil {
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return fmt.Errorf("config is missing")
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}
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if t.SizeLength == 0 {
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return fmt.Errorf("sizelength is missing")
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}
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return nil
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}
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// Marshal implements Format.
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func (t *MPEG4Audio) Marshal() (string, map[string]string) {
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enc, err := t.Config.Marshal()
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if err != nil {
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return "", nil
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}
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sampleRate := t.Config.SampleRate
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if t.Config.ExtensionSampleRate != 0 {
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sampleRate = t.Config.ExtensionSampleRate
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}
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fmtp := make(map[string]string)
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fmtp["profile-level-id"] = "1"
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fmtp["mode"] = "AAC-hbr"
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if t.SizeLength > 0 {
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fmtp["sizelength"] = strconv.FormatInt(int64(t.SizeLength), 10)
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}
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if t.IndexLength > 0 {
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fmtp["indexlength"] = strconv.FormatInt(int64(t.IndexLength), 10)
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}
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if t.IndexDeltaLength > 0 {
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fmtp["indexdeltalength"] = strconv.FormatInt(int64(t.IndexDeltaLength), 10)
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}
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fmtp["config"] = hex.EncodeToString(enc)
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return "mpeg4-generic/" + strconv.FormatInt(int64(sampleRate), 10) +
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"/" + strconv.FormatInt(int64(t.Config.ChannelCount), 10), fmtp
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}
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// PTSEqualsDTS implements Format.
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func (t *MPEG4Audio) PTSEqualsDTS(*rtp.Packet) bool {
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return true
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}
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// CreateDecoder creates a decoder able to decode the content of the format.
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func (t *MPEG4Audio) CreateDecoder() *rtpmpeg4audio.Decoder {
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d := &rtpmpeg4audio.Decoder{
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SampleRate: t.Config.SampleRate,
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SizeLength: t.SizeLength,
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IndexLength: t.IndexLength,
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IndexDeltaLength: t.IndexDeltaLength,
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}
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d.Init()
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return d
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}
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// CreateEncoder creates an encoder able to encode the content of the format.
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func (t *MPEG4Audio) CreateEncoder() *rtpmpeg4audio.Encoder {
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e := &rtpmpeg4audio.Encoder{
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PayloadType: t.PayloadTyp,
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SampleRate: t.Config.SampleRate,
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SizeLength: t.SizeLength,
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IndexLength: t.IndexLength,
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IndexDeltaLength: t.IndexDeltaLength,
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}
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e.Init()
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return e
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}
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