mirror of
https://github.com/AlexxIT/go2rtc.git
synced 2025-10-05 08:16:55 +08:00
124 lines
3.4 KiB
Go
124 lines
3.4 KiB
Go
package iso
|
|
|
|
import "github.com/AlexxIT/go2rtc/pkg/streamer"
|
|
|
|
const (
|
|
MoovTrakMdiaMinfStblStsdAvc1 = "avc1"
|
|
MoovTrakMdiaMinfStblStsdAvc1AvcC = "avcC"
|
|
MoovTrakMdiaMinfStblStsdHev1 = "hev1"
|
|
MoovTrakMdiaMinfStblStsdHev1HvcC = "hvcC"
|
|
MoovTrakMdiaMinfStblStsdMp4a = "mp4a"
|
|
MoovTrakMdiaMinfStblStsdOpus = "Opus"
|
|
)
|
|
|
|
func (m *Movie) WriteVideo(codec string, width, height uint16, conf []byte) {
|
|
// https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
|
|
switch codec {
|
|
case streamer.CodecH264:
|
|
m.StartAtom(MoovTrakMdiaMinfStblStsdAvc1)
|
|
case streamer.CodecH265:
|
|
m.StartAtom(MoovTrakMdiaMinfStblStsdHev1)
|
|
default:
|
|
panic("unsupported iso video: " + codec)
|
|
}
|
|
m.Skip(6)
|
|
m.WriteUint16(1) // data_reference_index
|
|
m.Skip(2) // version
|
|
m.Skip(2) // revision
|
|
m.Skip(4) // vendor
|
|
m.Skip(4) // temporal quality
|
|
m.Skip(4) // spatial quality
|
|
m.WriteUint16(width) // width
|
|
m.WriteUint16(height) // height
|
|
m.WriteFloat32(72) // horizontal resolution
|
|
m.WriteFloat32(72) // vertical resolution
|
|
m.Skip(4) // reserved
|
|
m.WriteUint16(1) // frame count
|
|
m.Skip(32) // compressor name
|
|
m.WriteUint16(24) // depth
|
|
m.WriteUint16(0xFFFF) // color table id (-1)
|
|
|
|
switch codec {
|
|
case streamer.CodecH264:
|
|
m.StartAtom(MoovTrakMdiaMinfStblStsdAvc1AvcC)
|
|
case streamer.CodecH265:
|
|
m.StartAtom(MoovTrakMdiaMinfStblStsdHev1HvcC)
|
|
}
|
|
m.Write(conf)
|
|
m.EndAtom() // AVCC
|
|
|
|
m.EndAtom() // AVC1
|
|
}
|
|
|
|
func (m *Movie) WriteAudio(codec string, channels uint16, sampleRate uint32, conf []byte) {
|
|
switch codec {
|
|
case streamer.CodecAAC:
|
|
m.StartAtom(MoovTrakMdiaMinfStblStsdMp4a)
|
|
case streamer.CodecOpus:
|
|
m.StartAtom(MoovTrakMdiaMinfStblStsdOpus)
|
|
default:
|
|
panic("unsupported iso audio: " + codec)
|
|
}
|
|
m.Skip(6)
|
|
m.WriteUint16(1) // data_reference_index
|
|
m.Skip(2) // version
|
|
m.Skip(2) // revision
|
|
m.Skip(4) // vendor
|
|
m.WriteUint16(channels) // channel_count
|
|
m.WriteUint16(16) // sample_size
|
|
m.Skip(2) // compression id
|
|
m.Skip(2) // reserved
|
|
m.WriteFloat32(float64(sampleRate)) // sample_rate
|
|
|
|
switch codec {
|
|
case streamer.CodecAAC:
|
|
m.WriteEsdsAAC(conf)
|
|
case streamer.CodecOpus:
|
|
m.WriteDops()
|
|
}
|
|
|
|
m.EndAtom() // MP4A/OPUS
|
|
}
|
|
|
|
func (m *Movie) WriteEsdsAAC(conf []byte) {
|
|
m.StartAtom("esds")
|
|
m.Skip(1) // version
|
|
m.Skip(3) // flags
|
|
|
|
// MP4ESDescrTag[3]:
|
|
// - MP4DecConfigDescrTag[4]:
|
|
// - MP4DecSpecificDescrTag[5]: conf
|
|
// - Other[6]
|
|
const header = 5
|
|
const size3 = 3
|
|
const size4 = 13
|
|
size5 := byte(len(conf))
|
|
const size6 = 1
|
|
|
|
m.WriteBytes(3, 0x80, 0x80, 0x80, size3+header+size4+header+size5+header+size6)
|
|
m.Skip(2) // es id
|
|
m.Skip(1) // es flags
|
|
|
|
m.WriteBytes(4, 0x80, 0x80, 0x80, size4+header+size5)
|
|
m.WriteBytes(0x40) // object id
|
|
m.WriteBytes(0x15) // stream type
|
|
m.Skip(3) // buffer size db
|
|
m.Skip(4) // max bitraga
|
|
m.Skip(4) // avg bitraga
|
|
|
|
m.WriteBytes(5, 0x80, 0x80, 0x80, size5)
|
|
m.Write(conf)
|
|
|
|
m.WriteBytes(6, 0x80, 0x80, 0x80, 1)
|
|
m.WriteBytes(2) // ?
|
|
|
|
m.EndAtom() // ESDS
|
|
}
|
|
|
|
func (m *Movie) WriteDops() {
|
|
// don't know what means this magic
|
|
m.StartAtom("dOps")
|
|
m.WriteBytes(0, 0x02, 0x01, 0x38, 0, 0, 0xBB, 0x80, 0, 0, 0)
|
|
m.EndAtom()
|
|
}
|