public virtual int init(int[] extraData)
{
context = MpegEncContext.avcodec_alloc_context();
picture = AVFrame.avcodec_alloc_frame();
packet = new AVPacket();
packet.av_init_packet();
if (extraData != null)
{
context.extradata_size = extraData.Length;
// Add 4 additional values to avoid exceptions while parsing
int[] extraDataPlus4 = new int[context.extradata_size + 4];
Array.Copy(extraData, 0, extraDataPlus4, 0, context.extradata_size);
context.extradata = extraDataPlus4;
}
int result = context.avcodec_open(new com.twilight.h264.decoder.H264Decoder());
if (result < 0)
{
return(result);
}
gotPicture[0] = 0;
return(0);
}
private void TryInit()
{
if (Initialized)
{
return;
}
Initialized = true;
avpkt.av_init_packet();
// Find the mpeg1 video decoder
InitProtected();
// The codec gives us the frame size, in samples
frame = 0;
var cacheRead = stackalloc int[3];
// avpkt must contain exactly 1 NAL Unit in order for decoder to decode correctly.
// thus we must read until we get next NAL header before sending it to decoder.
// Find 1st NAL
cacheRead[0] = ReadByte();
cacheRead[1] = ReadByte();
cacheRead[2] = ReadByte();
while (!(cacheRead[0] == 0x00 && cacheRead[1] == 0x00 && cacheRead[2] == 0x01))
{
cacheRead[0] = cacheRead[1];
cacheRead[1] = cacheRead[2];
cacheRead[2] = ReadByte();
if (cacheRead[2] == -1)
{
throw(new EndOfStreamException());
}
} // while
// 4 first bytes always indicate NAL header
inbuf_int[0] = inbuf_int[1] = inbuf_int[2] = 0x00;
inbuf_int[3] = 0x01;
//hasMoreNAL = true;
}
private void Init()
{
avpkt.av_init_packet();
// Set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams)
Arrays.Fill(inbuf, INBUF_SIZE, MpegEncContext.FF_INPUT_BUFFER_PADDING_SIZE + INBUF_SIZE, (sbyte)0);
// Find the mpeg1 video decoder
codec = new H264Decoder();
if (codec == null)
{
throw (new Exception("codec not found"));
}
c = MpegEncContext.avcodec_alloc_context();
picture = AVFrame.avcodec_alloc_frame();
// We do not send complete frames
if ((codec.capabilities & H264Decoder.CODEC_CAP_TRUNCATED) != 0)
{
c.flags |= MpegEncContext.CODEC_FLAG_TRUNCATED;
}
// For some codecs, such as msmpeg4 and mpeg4, width and height
// MUST be initialized there because this information is not
// available in the bitstream.
// Open it
if (c.avcodec_open(codec) < 0)
{
throw (new Exception("could not open codec"));
}
// The codec gives us the frame size, in samples
frame = 0;
// avpkt must contain exactly 1 NAL Unit in order for decoder to decode correctly.
// thus we must read until we get next NAL header before sending it to decoder.
// Find 1st NAL
cacheRead[0] = fin.ReadByte();
cacheRead[1] = fin.ReadByte();
cacheRead[2] = fin.ReadByte();
while (!(cacheRead[0] == 0x00 && cacheRead[1] == 0x00 && cacheRead[2] == 0x01))
{
cacheRead[0] = cacheRead[1];
cacheRead[1] = cacheRead[2];
cacheRead[2] = fin.ReadByte();
if (cacheRead[2] == -1)
{
throw(new EndOfStreamException());
}
} // while
// 4 first bytes always indicate NAL header
inbuf_int[0] = inbuf_int[1] = inbuf_int[2] = 0x00;
inbuf_int[3] = 0x01;
hasMoreNAL = true;
}
