mirror of
https://github.com/aler9/gortsplib
synced 2025-10-31 10:36:26 +08:00
134 lines
2.7 KiB
Go
134 lines
2.7 KiB
Go
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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"strings"
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"sync"
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"github.com/bluenviron/mediacommon/pkg/codecs/mpeg4video"
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"github.com/pion/rtp"
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"github.com/bluenviron/gortsplib/v4/pkg/format/rtpmpeg4video"
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)
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// MPEG4Video is the RTP format for a MPEG-4 Video codec.
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// Specification: https://datatracker.ietf.org/doc/html/rfc6416#section-7.1
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type MPEG4Video struct {
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PayloadTyp uint8
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ProfileLevelID int
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Config []byte
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mutex sync.RWMutex
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}
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func (f *MPEG4Video) unmarshal(ctx *unmarshalContext) error {
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f.PayloadTyp = ctx.payloadType
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f.ProfileLevelID = 1 // default value imposed by specification
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for key, val := range ctx.fmtp {
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switch key {
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case "profile-level-id":
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tmp, err := strconv.ParseUint(val, 10, 31)
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if err != nil {
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return fmt.Errorf("invalid profile-level-id: %v", val)
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}
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f.ProfileLevelID = int(tmp)
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case "config":
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var err error
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f.Config, err = hex.DecodeString(val)
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if err != nil {
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return fmt.Errorf("invalid config: %v", val)
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}
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err = mpeg4video.IsValidConfig(f.Config)
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if err != nil {
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return fmt.Errorf("invalid config: %w", err)
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}
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}
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}
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return nil
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}
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// Codec implements Format.
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func (f *MPEG4Video) Codec() string {
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return "MPEG-4 Video"
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}
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// ClockRate implements Format.
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func (f *MPEG4Video) ClockRate() int {
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return 90000
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}
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// PayloadType implements Format.
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func (f *MPEG4Video) PayloadType() uint8 {
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return f.PayloadTyp
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}
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// RTPMap implements Format.
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func (f *MPEG4Video) RTPMap() string {
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return "MP4V-ES/90000"
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}
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// FMTP implements Format.
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func (f *MPEG4Video) FMTP() map[string]string {
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fmtp := map[string]string{
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"profile-level-id": strconv.FormatInt(int64(f.ProfileLevelID), 10),
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}
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if f.Config != nil {
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fmtp["config"] = strings.ToUpper(hex.EncodeToString(f.Config))
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}
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return fmtp
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}
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// PTSEqualsDTS implements Format.
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func (f *MPEG4Video) 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 (f *MPEG4Video) CreateDecoder() (*rtpmpeg4video.Decoder, error) {
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d := &rtpmpeg4video.Decoder{}
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err := d.Init()
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if err != nil {
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return nil, err
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}
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return d, nil
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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 (f *MPEG4Video) CreateEncoder() (*rtpmpeg4video.Encoder, error) {
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e := &rtpmpeg4video.Encoder{
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PayloadType: f.PayloadTyp,
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}
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err := e.Init()
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if err != nil {
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return nil, err
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}
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return e, nil
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}
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// SafeSetParams sets the codec parameters.
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func (f *MPEG4Video) SafeSetParams(config []byte) {
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f.mutex.Lock()
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defer f.mutex.Unlock()
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f.Config = config
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}
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// SafeParams returns the codec parameters.
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func (f *MPEG4Video) SafeParams() []byte {
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f.mutex.RLock()
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defer f.mutex.RUnlock()
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return f.Config
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}
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