61 lines
1.4 KiB
Go
61 lines
1.4 KiB
Go
package formats
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import (
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"errors"
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"fmt"
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"github.com/bluenviron/gortsplib/v4"
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"github.com/bluenviron/gortsplib/v4/pkg/description"
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"github.com/bluenviron/gortsplib/v4/pkg/format"
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"github.com/bluenviron/gortsplib/v4/pkg/format/rtpvp8"
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"github.com/pion/rtp"
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"image"
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)
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// FindVP8Format finds the VP8 media and format.
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func FindVP8Format(desc *description.Session) (*format.VP8, *description.Media, error) {
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var vp8Format *format.VP8
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vp8Media := desc.FindFormat(&vp8Format)
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if vp8Media == nil {
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return nil, nil, errors.New("media VP8 not found")
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}
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return vp8Format, vp8Media, nil
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}
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// ProcessVP8RGBA processes VP8 flow and returns PTS and IMG.
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func ProcessVP8RGBA(
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c *gortsplib.Client,
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vp8Media *description.Media,
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vp8RTPDec *rtpvp8.Decoder,
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vp8Dec *VPDecoder,
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pkt *rtp.Packet,
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) (
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int64,
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*image.RGBA,
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error) {
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// Decode timestamp.
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pts, ok := c.PacketPTS2(vp8Media, pkt)
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if !ok {
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return 0, nil, fmt.Errorf("waiting for timestamp\n")
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}
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// Extract access units from RTP packets.
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au, err := vp8RTPDec.Decode(pkt)
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if err != rtpvp8.ErrNonStartingPacketAndNoPrevious && err != rtpvp8.ErrMorePacketsNeeded {
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return 0, nil, fmt.Errorf("decoding RTP packet error: %w", err)
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}
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// Convert VP8 access units into RGBA frames.
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img, err := vp8Dec.Decode(au)
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if err != nil {
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return 0, nil, fmt.Errorf("convert into RGBA frames error\n")
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}
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// Wait for a frame.
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if img == nil {
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return 0, nil, fmt.Errorf("frame not found\n")
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}
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return pts, img, nil
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}
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