func (m *Muxer) writeAudioFrame(frame *C.AVFrame) bool {
for C.av_audio_fifo_size(m.fifo) < 1024 { // generate & store in fifo
C.fill_audio_frame(frame, m.audioStream.stream.codec)
frame_size := frame.nb_samples
if C.av_audio_fifo_realloc(m.fifo, C.av_audio_fifo_size(m.fifo)+frame_size) < 0 {
return false
}
if C.av_audio_fifo_write(m.fifo, (*unsafe.Pointer)(unsafe.Pointer(&frame.data[0])), frame_size) < frame_size {
return false
}
}
got_packet := C.int(0)
for C.av_audio_fifo_size(m.fifo) >= 1024 { // read & encode & write
frame_size := C.min(C.av_audio_fifo_size(m.fifo), m.audioStream.stream.codec.frame_size)
output_frame := C.alloc_audio_frame(m.audioStream.stream.codec)
if C.av_audio_fifo_read(m.fifo, (*unsafe.Pointer)(unsafe.Pointer(&output_frame.data[0])), frame_size) < frame_size {
C.av_frame_free(&output_frame)
return false
}
pkt := C.AVPacket{}
C.av_init_packet(&pkt)
output_frame.pts = C.int64_t(m.audioStream.ts)
m.audioStream.ts += int(m.audioStream.stream.codec.frame_size)
if C.avcodec_encode_audio2(m.audioStream.stream.codec, &pkt, frame, &got_packet) < 0 {
C.av_free_packet(&pkt)
return false
}
if got_packet == 0 {
continue
}
C.av_packet_rescale_ts(&pkt, m.audioStream.stream.codec.time_base, m.audioStream.stream.time_base)
pkt.stream_index = m.audioStream.stream.index
if C.av_interleaved_write_frame(m.context, &pkt) < 0 {
return false
}
}
return true
}
func (m *Muxer) writeVideoFrame(frame *C.AVFrame) bool {
if m.capture.Read(frame) != nil {
return false
}
if m.display != nil {
m.display.Render(frame)
}
pkt := C.AVPacket{}
C.av_init_packet(&pkt)
frame.pts = C.int64_t(m.videoStream.ts)
m.videoStream.ts++
got_packet := C.int(0)
if C.avcodec_encode_video2(m.videoStream.stream.codec, &pkt, frame, &got_packet) < 0 {
C.av_free_packet(&pkt)
return false
}
if got_packet == 0 {
return false
}
C.av_packet_rescale_ts(&pkt, m.videoStream.stream.codec.time_base, m.videoStream.stream.time_base)
pkt.stream_index = m.videoStream.stream.index
return C.av_interleaved_write_frame(m.context, &pkt) == 0
}
func (c *Decoder) decodeAudio(p Packet) *Frame {
packet := new(C.AVPacket)
C.av_init_packet(packet)
defer C.av_free_packet(packet)
packet.pts = C.int64_t(p.Pts)
packet.dts = C.int64_t(p.Dts)
packet.size = C.int(p.Size)
packet.data = (*C.uint8_t)(unsafe.Pointer(&p.Data[0]))
packet.stream_index = C.int(p.Stream)
packet.flags = C.int(p.Flags)
packet.duration = C.int(p.Duration)
packet.pos = C.int64_t(p.Pos)
//size:=packet.size;
samples_size := C.int(C.AVCODEC_MAX_AUDIO_FRAME_SIZE)
//bps := C.av_get_bits_per_sample_fmt(c.Ctx.sample_fmt) >> 3;
outbuf := (*C.uint8_t)(C.av_malloc(C.uint(samples_size)))
defer C.av_free(unsafe.Pointer(outbuf))
C.avcodec_decode_audio3(c.Ctx, (*C.int16_t)(unsafe.Pointer(outbuf)), &samples_size, packet)
//println(data_len)
return nil
}
func (c *Decoder) decodeVideo(p Packet) *Frame {
if !c.Valid {
//println("try to decode with an invalid Decoder")
return nil
}
//println("try to decode with a valid Decoder")
packet := new(C.AVPacket)
C.av_init_packet(packet)
defer C.av_free_packet(packet)
packet.pts = C.int64_t(p.Pts)
packet.dts = C.int64_t(p.Dts)
packet.size = C.int(p.Size)
//packet.data=&C.uint8_t(make([]byte, p.Size)[0])
//myBytes:=make([]byte,p.Size);
/*
var pb *byte
if(len(p.Data)>0){
//println("Data > 0")
pb=&p.Data[0]
}*/
packet.data = (*C.uint8_t)(unsafe.Pointer(&p.Data[0]))
// println(p.Data)
// println(pb)
// println(packet.data)
// packet.data=unsafe.Pointer(p.Data)
// for i:= 0; i < re.Size; i++ {
// re.Data[i] = data[i];
// }
packet.stream_index = C.int(p.Stream)
packet.flags = C.int(p.Flags)
packet.duration = C.int(p.Duration)
packet.pos = C.int64_t(p.Pos)
height := c.Ctx.height
width := c.Ctx.width
var frame *Frame = new(Frame)
numBytes := C.avpicture_get_size(0, width, height)
//_size = numBytes;
//_buffer := (*C.uint8_t) (C.av_malloc(C.uint(numBytes)));
if numBytes > 0 {
var buffer []byte = make([]byte, numBytes)
var pbuffer *byte = &buffer[0]
// C.memset((*C.uint8_t)(_buffer), 0, C.size_t(numBytes));
// Assign appropriate parts of buffer to image planes
//var picture * C.AVPicture=(*C.AVPicture)(unsafe.Pointer(frame))
//println(frame)
//println(picture)
//:=&frame
//854x480
C.avpicture_fill((*C.AVPicture)(unsafe.Pointer(frame)), (*C.uint8_t)(unsafe.Pointer(pbuffer)), 0, width, height)
}
//frameFinished:=C.int(0)
var frameFinished *C.int = new(C.int)
//bytes_decoded:=
C.avcodec_decode_video2(c.Ctx, (*C.AVFrame)(unsafe.Pointer(frame)), frameFinished, packet)
frame.pts = packet.pts
//frame.dts=packet.dts
/*
//C.avcodec_decode_video2(nil,nil,nil,nil)
header:=fmt.Sprintf("P5\n%d %d\n255\n",width,height)
file, err := os.Open("test.ppm", os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0666)
if(err!=nil){
println("error while openning file")
}
file.WriteString(header)
linesize:=int(frame.linesize[0])
//println(linesize)
data:=make([]byte, width)
tmpdata:=(*(*[1<<30]byte)(unsafe.Pointer(frame.data[0])))[0:numBytes]
// for i:= 0; i < 1; i++ {
// data[i] = tmpdata[i];
// }
for i := 0; i < int(height); i++{
for a:= 0; a < int(width); a++ {
data[a] = tmpdata[(i*linesize)+a];
}
file.Write(data);
}
file.Close()*/
//ioutil.WriteFile("test.data", header,0755)
//println("bla fasel")
//println(bytes_decoded)
//println(*frameFinished)
return frame
}