first commit

format/mp4/stream.go

@@ -0,0 +1,59 @@
+package mp4
+
+import (
+	"time"
+
+	"github.com/deepch/vdk/av"
+	"github.com/deepch/vdk/format/mp4/mp4io"
+)
+
+type Stream struct {
+	av.CodecData
+
+	trackAtom *mp4io.Track
+	idx       int
+
+	lastpkt *av.Packet
+
+	timeScale int64
+	duration  int64
+
+	muxer   *Muxer
+	demuxer *Demuxer
+
+	sample      *mp4io.SampleTable
+	sampleIndex int
+
+	sampleOffsetInChunk int64
+	syncSampleIndex     int
+
+	dts                    int64
+	sttsEntryIndex         int
+	sampleIndexInSttsEntry int
+
+	cttsEntryIndex         int
+	sampleIndexInCttsEntry int
+
+	chunkGroupIndex    int
+	chunkIndex         int
+	sampleIndexInChunk int
+
+	sttsEntry *mp4io.TimeToSampleEntry
+	cttsEntry *mp4io.CompositionOffsetEntry
+}
+
+func timeToTs(tm time.Duration, timeScale int64) int64 {
+	return int64(tm * time.Duration(timeScale) / time.Second)
+}
+
+func tsToTime(ts int64, timeScale int64) time.Duration {
+	return time.Duration(ts) * time.Second / time.Duration(timeScale)
+}
+
+func (self *Stream) timeToTs(tm time.Duration) int64 {
+	return int64(tm * time.Duration(self.timeScale) / time.Second)
+}
+
+func (self *Stream) tsToTime(ts int64) time.Duration {
+	return time.Duration(ts) * time.Second / time.Duration(self.timeScale)
+}