mirror of https://bitbucket.org/ausocean/av.git
402 lines
9.6 KiB
Go
402 lines
9.6 KiB
Go
package mts
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import (
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"bytes"
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"math/rand"
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"reflect"
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"strconv"
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"testing"
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"time"
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"bitbucket.org/ausocean/av/container/mts/meta"
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"bitbucket.org/ausocean/av/container/mts/psi"
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)
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// TestExtract checks that we can coorectly extract media, pts, id and meta from
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// an mpegts stream using Extract.
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func TestExtract(t *testing.T) {
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Meta = meta.New()
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const (
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psiInterval = 5 // Write PSI at start and after every 5 frames.
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numOfFrames = 30 // Total number of frames to write.
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maxFrameSize = 1000 // Max frame size to randomly generate.
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minFrameSize = 100 // Min frame size to randomly generate.
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rate = 25 // Framerate (fps)
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interval = float64(1) / rate // Time interval between frames.
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ptsFreq = 90000 // Standard PTS frequency base.
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)
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frames := genFrames(numOfFrames, minFrameSize, maxFrameSize)
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var (
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clip bytes.Buffer // This will hold the MPEG-TS data.
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want Clip // This is the Clip that we should get.
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err error
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)
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// Now write frames.
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var curTime float64
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for i, frame := range frames {
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// Check to see if it's time to write another lot of PSI.
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if i%psiInterval == 0 && i != len(frames)-1 {
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// We'll add the frame number as meta.
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Meta.Add("frameNum", strconv.Itoa(i))
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err = writePSIWithMeta(&clip)
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if err != nil {
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t.Fatalf("did not expect error writing psi: %v", err)
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}
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}
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nextPTS := uint64(curTime * ptsFreq)
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err = writeFrame(&clip, frame, uint64(nextPTS))
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if err != nil {
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t.Fatalf("did not expect error writing frame: %v", err)
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}
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curTime += interval
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// Need the meta map for the new expected Frame.
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metaMap, err := meta.GetAllAsMap(Meta.Encode())
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if err != nil {
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t.Fatalf("did not expect error getting meta map: %v", err)
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}
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// Create an equivalent Frame and append to our Clip want.
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want.frames = append(want.frames, Frame{
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Media: frame,
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PTS: nextPTS,
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ID: H264ID,
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Meta: metaMap,
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})
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}
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// Now use Extract to get frames from clip.
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got, err := Extract(clip.Bytes())
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if err != nil {
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t.Fatalf("did not expect error using Extract. Err: %v", err)
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}
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// Check length of got and want.
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if len(want.frames) != len(got.frames) {
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t.Fatalf("did not get expected length for got.\nGot: %v\n, Want: %v\n", len(got.frames), len(want.frames))
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}
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// Check frames individually.
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for i, frame := range want.frames {
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// Check media data.
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wantMedia := frame.Media
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gotMedia := got.frames[i].Media
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if !bytes.Equal(wantMedia, gotMedia) {
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t.Fatalf("did not get expected data for frame: %v\nGot: %v\nWant: %v\n", i, gotMedia, wantMedia)
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}
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// Check stream ID.
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wantID := frame.ID
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gotID := got.frames[i].ID
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if wantID != gotID {
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t.Fatalf("did not get expected ID for frame: %v\nGot: %v\nWant: %v\n", i, gotID, wantID)
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}
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// Check meta.
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wantMeta := frame.Meta
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gotMeta := got.frames[i].Meta
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if !reflect.DeepEqual(wantMeta, gotMeta) {
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t.Fatalf("did not get expected meta for frame: %v\nGot: %v\nwant: %v\n", i, gotMeta, wantMeta)
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}
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}
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}
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// writePSIWithMeta writes PSI to b with updated metadata.
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func writePSIWithMeta(b *bytes.Buffer) error {
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// Write PAT.
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pat := Packet{
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PUSI: true,
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PID: PatPid,
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CC: 0,
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AFC: HasPayload,
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Payload: psi.AddPadding(patTable),
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}
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_, err := b.Write(pat.Bytes(nil))
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if err != nil {
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return err
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}
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// Update the meta in the pmt table.
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pmtTable, err = updateMeta(pmtTable)
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if err != nil {
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return err
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}
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// Write PMT.
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pmt := Packet{
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PUSI: true,
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PID: PmtPid,
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CC: 0,
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AFC: HasPayload,
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Payload: psi.AddPadding(pmtTable),
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}
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_, err = b.Write(pmt.Bytes(nil))
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if err != nil {
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return err
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}
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return nil
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}
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// TestClipBytes checks that Clip.Bytes correctly returns the concatendated media
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// data from the Clip's frames slice.
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func TestClipBytes(t *testing.T) {
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Meta = meta.New()
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const (
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psiInterval = 5 // Write PSI at start and after every 5 frames.
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numOfFrames = 30 // Total number of frames to write.
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maxFrameSize = 1000 // Max frame size to randomly generate.
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minFrameSize = 100 // Min frame size to randomly generate.
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rate = 25 // Framerate (fps)
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interval = float64(1) / rate // Time interval between frames.
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ptsFreq = 90000 // Standard PTS frequency base.
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)
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frames := genFrames(numOfFrames, minFrameSize, maxFrameSize)
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var (
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clip bytes.Buffer // This will hold the MPEG-TS data.
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want []byte // This is the Clip that we should get.
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err error
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)
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// Now write frames.
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var curTime float64
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for i, frame := range frames {
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// Check to see if it's time to write another lot of PSI.
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if i%psiInterval == 0 && i != len(frames)-1 {
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// We'll add the frame number as meta.
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Meta.Add("frameNum", strconv.Itoa(i))
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err = writePSIWithMeta(&clip)
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if err != nil {
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t.Fatalf("did not expect error writing psi: %v", err)
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}
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}
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nextPTS := uint64(curTime * ptsFreq)
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err = writeFrame(&clip, frame, uint64(nextPTS))
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if err != nil {
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t.Fatalf("did not expect error writing frame: %v", err)
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}
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curTime += interval
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// Append the frame straight to the expected pure media slice.
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want = append(want, frame...)
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}
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// Now use Extract to get Clip and then use Bytes to get the slice of straight media.
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gotClip, err := Extract(clip.Bytes())
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if err != nil {
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t.Fatalf("did not expect error using Extract. Err: %v", err)
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}
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got := gotClip.Bytes()
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// Check length and equality of got and want.
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if len(want) != len(got) {
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t.Fatalf("did not get expected length for got.\nGot: %v\n, Want: %v\n", len(got), len(want))
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}
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if !bytes.Equal(want, got) {
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t.Error("did not get expected result")
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}
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}
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// genFrames is a helper function to generate a series of dummy media frames
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// with randomized size. n is the number of frames to generate, min is the min
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// size is min size of random frame and max is max size of random frames.
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func genFrames(n, min, max int) [][]byte {
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// Generate randomly sized data for each frame and fill.
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rand.Seed(time.Now().UnixNano())
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frames := make([][]byte, n)
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for i := range frames {
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frames[i] = make([]byte, rand.Intn(max-min)+min)
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for j := 0; j < len(frames[i]); j++ {
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frames[i][j] = byte(j)
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}
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}
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return frames
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}
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// TestTrimToPTSRange checks that Clip.TrimToPTSRange will correctly return a
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// sub Clip of the given PTS range.
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func TestTrimToPTSRange(t *testing.T) {
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const (
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numOfTestFrames = 10
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ptsInterval = 4
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frameSize = 3
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)
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clip := &Clip{}
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// Generate test frames.
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for i := 0; i < numOfTestFrames; i++ {
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clip.backing = append(clip.backing, []byte{byte(i), byte(i), byte(i)}...)
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clip.frames = append(
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clip.frames,
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Frame{
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Media: clip.backing[i*frameSize : (i+1)*frameSize],
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PTS: uint64(i * ptsInterval),
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idx: i * frameSize,
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},
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)
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}
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// We test each of these scenarios.
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tests := []struct {
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from uint64
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to uint64
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expect []byte
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err error
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}{
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{
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from: 6,
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to: 15,
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expect: []byte{
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0x01, 0x01, 0x01,
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0x02, 0x02, 0x02,
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0x03, 0x03, 0x03,
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},
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err: nil,
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},
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{
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from: 4,
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to: 16,
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expect: []byte{
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0x01, 0x01, 0x01,
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0x02, 0x02, 0x02,
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0x03, 0x03, 0x03,
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},
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err: nil,
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},
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{
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from: 10,
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to: 5,
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expect: nil,
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err: errPTSRange,
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},
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{
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from: 50,
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to: 70,
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expect: nil,
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err: errPTSLowerBound,
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},
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{
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from: 5,
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to: 70,
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expect: nil,
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err: errPTSUpperBound,
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},
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}
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// Run tests.
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for i, test := range tests {
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got, err := clip.TrimToPTSRange(test.from, test.to)
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// First check the error.
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if err != nil && err != test.err {
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t.Errorf("unexpected error: %v for test: %v", err, i)
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continue
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} else if err != test.err {
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t.Errorf("expected to get error: %v for test: %v", test.err, i)
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continue
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}
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// Now check data.
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if test.err == nil && !bytes.Equal(test.expect, got.Bytes()) {
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t.Errorf("did not get expected data for test: %v\n Got: %v\n, Want: %v\n", i, got, test.expect)
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}
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}
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}
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// TestTrimToMetaRange checks that Clip.TrimToMetaRange correctly provides a
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// sub Clip for a given meta range.
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func TestClipTrimToMetaRange(t *testing.T) {
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const (
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numOfTestFrames = 10
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ptsInterval = 4
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frameSize = 3
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key = "n"
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)
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clip := &Clip{}
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// Generate test frames.
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for i := 0; i < numOfTestFrames; i++ {
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clip.backing = append(clip.backing, []byte{byte(i), byte(i), byte(i)}...)
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clip.frames = append(
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clip.frames,
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Frame{
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Media: clip.backing[i*frameSize : (i+1)*frameSize],
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idx: i * frameSize,
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Meta: map[string]string{
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key: strconv.Itoa(i),
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},
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},
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)
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}
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// We test each of these scenarios.
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tests := []struct {
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from string
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to string
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expect []byte
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err error
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}{
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{
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from: "1",
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to: "3",
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expect: []byte{
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0x01, 0x01, 0x01,
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0x02, 0x02, 0x02,
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0x03, 0x03, 0x03,
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},
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err: nil,
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},
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{
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from: "1",
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to: "1",
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expect: nil,
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err: errMetaRange,
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},
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{
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from: "20",
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to: "1",
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expect: nil,
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err: errMetaLowerBound,
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},
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{
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from: "1",
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to: "20",
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expect: nil,
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err: errMetaUpperBound,
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},
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}
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// Run tests.
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for i, test := range tests {
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got, err := clip.TrimToMetaRange(key, test.from, test.to)
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// First check the error.
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if err != nil && err != test.err {
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t.Errorf("unexpected error: %v for test: %v", err, i)
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continue
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} else if err != test.err {
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t.Errorf("expected to get error: %v for test: %v", test.err, i)
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continue
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}
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// Now check data.
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if test.err == nil && !bytes.Equal(test.expect, got.Bytes()) {
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t.Errorf("did not get expected data for test: %v\n Got: %v\n, Want: %v\n", i, got, test.expect)
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}
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}
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}
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