/
main.go
150 lines (125 loc) · 2.95 KB
/
main.go
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package main
import (
"flag"
"fmt"
"github.com/veandco/go-sdl2/sdl"
"io"
"os"
"reflect"
"runtime"
"strings"
"unsafe"
)
import (
"github.com/32bitkid/mpeg/pes"
"github.com/32bitkid/mpeg/ps"
"github.com/32bitkid/mpeg/ts"
"github.com/32bitkid/mpeg/video"
)
const (
winTitle string = "Go-SDL2 MPEG-2 TS Player"
winWidth, winHeight int = 1920 >> 1, 1080 >> 1
)
var pid = flag.Int("pid", 0x01, "the PID to play")
func init() {
runtime.LockOSThread()
}
func play(seq *video.VideoSequence) {
var window *sdl.Window
var renderer *sdl.Renderer
var texture *sdl.Texture
var err error
window, err = sdl.CreateWindow(winTitle,
sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight,
sdl.WINDOW_SHOWN)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", err)
os.Exit(1)
}
defer window.Destroy()
renderer, err = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", err)
os.Exit(2)
}
defer renderer.Destroy()
seq.AlignTo(video.SequenceHeaderStartCode)
var pointer unsafe.Pointer
var pitch int
var yLen int
var cLen int
sdl.Delay(1000)
renderer.Present()
for {
img, err := seq.Next()
if err == io.EOF {
break
}
if err != nil {
fmt.Fprintf(os.Stderr, "Decoding error: %s\n", err)
os.Exit(3)
}
if texture == nil {
w, h := seq.Size()
yLen = w * h
cLen = (w * h) >> 2
texture, err = renderer.CreateTexture(sdl.PIXELFORMAT_IYUV, sdl.TEXTUREACCESS_STREAMING, w, h)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create texture: %s\n", err)
os.Exit(4)
}
defer texture.Destroy()
}
{
texture.Lock(nil, &pointer, &pitch)
// Convert pointer to []uint8
pixels := *(*[]uint8)(unsafe.Pointer(&reflect.SliceHeader{
Data: uintptr(pointer),
Len: yLen + 2*cLen,
Cap: yLen + 2*cLen,
}))
// Select color planes
y := pixels[0:yLen]
cb := pixels[yLen : yLen+cLen]
cr := pixels[yLen+cLen : yLen+cLen+cLen]
// Copy image data into texture
copy(y, img.Y)
copy(cb, img.Cb)
copy(cr, img.Cr)
texture.Unlock()
}
err = renderer.Copy(texture, nil, nil)
if err != nil {
fmt.Fprintf(os.Stderr, "Copy failed: %s\n", err)
os.Exit(5)
}
renderer.Present()
}
}
func main() {
flag.Parse()
if len(flag.Args()) == 0 {
flag.Usage()
os.Exit(1)
}
filename := flag.Arg(0)
var seq *video.VideoSequence
if strings.HasSuffix(filename, ".ts") || strings.HasSuffix(filename, ".mts") {
file, err := os.Open(filename)
if err != nil {
fmt.Fprintf(os.Stderr, "Error: %s\n", err)
}
tsReader := ts.NewPayloadUnitReader(file, ts.IsPID(uint32(*pid)))
pesReader := pes.NewPayloadReader(tsReader)
seq = video.NewVideoSequence(pesReader)
} else {
file, err := os.Open(filename)
if err != nil {
fmt.Fprintf(os.Stderr, "Error: %s\n", err)
}
packPayload := ps.NewPackReader(file)
seq = video.NewVideoSequence(packPayload)
}
play(seq)
}