private void WriteHeader(FileStream target, DPGHeader header)
{
//revision (4 bytes)
WriteText(target, header.version.ToString());
//frames (4 bytes integer)
target.Write(BitConverter.GetBytes(header.frames), 0, 4);
//pad (1 byte)
target.WriteByte(0);
//fps (1 byte)
target.Write(BitConverter.GetBytes(header.fps), 0, 1);
//pad (2 byte)
target.WriteByte(0);
target.WriteByte(0);
//sample rate (4 bytes integer)
target.Write(BitConverter.GetBytes(header.samplerate), 0, 4);
//channels (4 bytes integer)
target.Write(BitConverter.GetBytes((int)header.audio_id), 0, 4);
//audio start offset (4 bytes integer)
target.Write(BitConverter.GetBytes(header.aoffset), 0, 4);
//audio size (4 bytes integer):
target.Write(BitConverter.GetBytes(header.asize), 0, 4);
//video start offset (4 bytes integer)
target.Write(BitConverter.GetBytes(header.aoffset + header.asize), 0, 4);
//video size (4 bytes integer)
target.Write(BitConverter.GetBytes(header.vsize), 0, 4);
if (header.version == version_id.DPG2 ||
header.version == version_id.DPG3)
{
//gop offset (4 bytes integer)
target.Write(BitConverter.GetBytes(header.goffset), 0, 4);
//gop size (4 bytes integer)
target.Write(BitConverter.GetBytes(header.gsize), 0, 4);
}
}
public void DemuxVideo(string infile, string outfile)
{
DPGHeader header = ReadHeader(infile);
using (FileStream outstream = new FileStream(outfile, FileMode.Create))
{
using (FileStream instream = File.OpenRead(infile))
{
CopyStream(instream, outstream, header.voffset, header.vsize);
}
}
}
public void MuxStreams(Massive m)
{
//создаём новый файл
using (FileStream target = new FileStream(m.outfilepath, FileMode.Create))
{
//создаём заголовок
DPGHeader header = new DPGHeader();
header.version = version_id.DPG0;
header.aoffset = 36;
header.frames = m.outframes;
header.fps = (int)Calculate.ConvertStringToDouble(m.outframerate);
header.vsize = (int)new FileInfo(m.outvideofile).Length;
header.pixel_format = pixel_format.RGB24;
if (m.outaudiostreams.Count > 0)
{
AudioStream a = (AudioStream)m.outaudiostreams[m.outaudiostream];
header.samplerate = Convert.ToInt32(a.samplerate);
header.asize = (int)new FileInfo(a.audiopath).Length;
string aext = Path.GetExtension(a.audiopath).ToLower();
if (aext == ".mp2")
{
header.audio_id = audio_id.MP2;
}
if (aext == ".gsm" && a.channels == 1)
{
header.audio_id = audio_id.GSM1;
}
if (aext == ".gsm" && a.channels == 2)
{
header.audio_id = audio_id.GSM2;
}
if (aext == ".ogg")
{
header.audio_id = audio_id.OGG;
}
}
//пишем заголовок
WriteHeader(target, header);
//вычисляем процент
long total = header.aoffset + header.asize + header.vsize;
//пишем звук
if (m.outaudiostreams.Count > 0)
{
AudioStream a = (AudioStream)m.outaudiostreams[m.outaudiostream];
using (FileStream fs = File.OpenRead(a.audiopath))
{
byte[] buffer = new byte[16384];
int bytesRead;
while (true)
{
//читаем
bytesRead = fs.Read(buffer, 0, buffer.Length);
//прогресс
double progress = ((double)target.Position / (double)total) * 100.0;
ProgressChanged(progress);
//файл закончился
if (bytesRead == 0)
{
break;
}
//пишем в новый файл
target.Write(buffer, 0, bytesRead);
fs.Flush();
target.Flush();
}
}
}
//пишем видео
using (FileStream fs = File.OpenRead(m.outvideofile))
{
byte[] buffer = new byte[16384];
int bytesRead;
while (true)
{
//читаем
bytesRead = fs.Read(buffer, 0, buffer.Length);
//файл закончился
if (bytesRead == 0)
{
break;
}
//прогресс
double progress = ((double)target.Position / (double)total) * 100.0;
ProgressChanged(progress);
//пишем в файл
target.Write(buffer, 0, bytesRead);
fs.Flush();
target.Flush();
}
}
}
}
public DPGHeader ReadHeader(string filepath)
{
DPGHeader header = new DPGHeader();
ASCIIEncoding encoder = new ASCIIEncoding();
//пробуем прочитать header
using (FileStream fs = File.OpenRead(filepath))
{
//revision (4 bytes)
byte[] buffer = new byte[4];
fs.Read(buffer, 0, buffer.Length);
header.version = (version_id)Enum.Parse(typeof(version_id), encoder.GetString(buffer));
//frames (4 bytes integer)
fs.Read(buffer, 0, buffer.Length);
header.frames = BitConverter.ToInt32(buffer, 0);
//pad (1 byte)
fs.ReadByte();
//fps (1 byte)
buffer = new byte[1];
fs.Read(buffer, 0, buffer.Length);
header.fps = buffer[0];
//pad (2 byte)
fs.ReadByte();
fs.ReadByte();
//sample rate (4 bytes integer)
buffer = new byte[4];
fs.Read(buffer, 0, buffer.Length);
header.samplerate = BitConverter.ToInt32(buffer, 0);
//audio_id (4 bytes integer)
fs.Read(buffer, 0, buffer.Length);
header.audio_id = (audio_id)Enum.Parse(typeof(audio_id), BitConverter.ToInt32(buffer, 0).ToString());
//audio start offset (4 bytes integer)
fs.Read(buffer, 0, buffer.Length);
header.aoffset = BitConverter.ToInt32(buffer, 0);
//audio size (4 bytes integer):
fs.Read(buffer, 0, buffer.Length);
header.asize = BitConverter.ToInt32(buffer, 0);
//video start offset (4 bytes integer)
fs.Read(buffer, 0, buffer.Length);
header.voffset = BitConverter.ToInt32(buffer, 0);
//video size (4 bytes integer)
fs.Read(buffer, 0, buffer.Length);
header.vsize = BitConverter.ToInt32(buffer, 0);
if (header.version == version_id.DPG2 ||
header.version == version_id.DPG3)
{
//gop offset
fs.Read(buffer, 0, buffer.Length);
header.goffset = BitConverter.ToInt32(buffer, 0);
//gop size
fs.Read(buffer, 0, buffer.Length);
header.gsize = BitConverter.ToInt32(buffer, 0);
}
//проверка на целостность
if ((fs.Length - (header.aoffset + header.asize + header.vsize)) == 0)
{
header.complete = true;
}
else
{
header.complete = false;
}
}
return(header);
}
public void MuxStreams(Massive m)
{
//создаём новый файл
using (FileStream target = new FileStream(m.outfilepath, FileMode.Create))
{
//создаём заголовок
DPGHeader header = new DPGHeader();
header.version = version_id.DPG0;
header.aoffset = 36;
header.frames = m.outframes;
header.fps = (int)Calculate.ConvertStringToDouble(m.outframerate);
header.vsize = (int)new FileInfo(m.outvideofile).Length;
header.pixel_format = pixel_format.RGB24;
if (m.outaudiostreams.Count > 0)
{
AudioStream a = (AudioStream)m.outaudiostreams[m.outaudiostream];
header.samplerate = Convert.ToInt32(a.samplerate);
header.asize = (int)new FileInfo(a.audiopath).Length;
string aext = Path.GetExtension(a.audiopath).ToLower();
if (aext == ".mp2")
header.audio_id = audio_id.MP2;
if (aext == ".gsm" && a.channels == 1)
header.audio_id = audio_id.GSM1;
if (aext == ".gsm" && a.channels == 2)
header.audio_id = audio_id.GSM2;
if (aext == ".ogg")
header.audio_id = audio_id.OGG;
}
//пишем заголовок
WriteHeader(target, header);
//вычисляем процент
long total = header.aoffset + header.asize + header.vsize;
//пишем звук
if (m.outaudiostreams.Count > 0)
{
AudioStream a = (AudioStream)m.outaudiostreams[m.outaudiostream];
using (FileStream fs = File.OpenRead(a.audiopath))
{
byte[] buffer = new byte[16384];
int bytesRead;
while (true)
{
//читаем
bytesRead = fs.Read(buffer, 0, buffer.Length);
//прогресс
double progress = ((double)target.Position / (double)total) * 100.0;
ProgressChanged(progress);
//файл закончился
if (bytesRead == 0)
break;
//пишем в новый файл
target.Write(buffer, 0, bytesRead);
fs.Flush();
target.Flush();
}
}
}
//пишем видео
using (FileStream fs = File.OpenRead(m.outvideofile))
{
byte[] buffer = new byte[16384];
int bytesRead;
while (true)
{
//читаем
bytesRead = fs.Read(buffer, 0, buffer.Length);
//файл закончился
if (bytesRead == 0)
break;
//прогресс
double progress = ((double)target.Position / (double)total) * 100.0;
ProgressChanged(progress);
//пишем в файл
target.Write(buffer, 0, bytesRead);
fs.Flush();
target.Flush();
}
}
}
}
private void WriteHeader(FileStream target, DPGHeader header)
{
//revision (4 bytes)
WriteText(target, header.version.ToString());
//frames (4 bytes integer)
target.Write(BitConverter.GetBytes(header.frames), 0, 4);
//pad (1 byte)
target.WriteByte(0);
//fps (1 byte)
target.Write(BitConverter.GetBytes(header.fps), 0, 1);
//pad (2 byte)
target.WriteByte(0);
target.WriteByte(0);
//sample rate (4 bytes integer)
target.Write(BitConverter.GetBytes(header.samplerate), 0, 4);
//channels (4 bytes integer)
target.Write(BitConverter.GetBytes((int)header.audio_id), 0, 4);
//audio start offset (4 bytes integer)
target.Write(BitConverter.GetBytes(header.aoffset), 0, 4);
//audio size (4 bytes integer):
target.Write(BitConverter.GetBytes(header.asize), 0, 4);
//video start offset (4 bytes integer)
target.Write(BitConverter.GetBytes(header.aoffset + header.asize), 0, 4);
//video size (4 bytes integer)
target.Write(BitConverter.GetBytes(header.vsize), 0, 4);
if (header.version == version_id.DPG2 ||
header.version == version_id.DPG3)
{
//gop offset (4 bytes integer)
target.Write(BitConverter.GetBytes(header.goffset), 0, 4);
//gop size (4 bytes integer)
target.Write(BitConverter.GetBytes(header.gsize), 0, 4);
}
}
public DPGHeader ReadHeader(string filepath)
{
DPGHeader header = new DPGHeader();
ASCIIEncoding encoder = new ASCIIEncoding();
//пробуем прочитать header
using (FileStream fs = File.OpenRead(filepath))
{
//revision (4 bytes)
byte[] buffer = new byte[4];
fs.Read(buffer, 0, buffer.Length);
header.version = (version_id)Enum.Parse(typeof(version_id), encoder.GetString(buffer));
//frames (4 bytes integer)
fs.Read(buffer, 0, buffer.Length);
header.frames = BitConverter.ToInt32(buffer, 0);
//pad (1 byte)
fs.ReadByte();
//fps (1 byte)
buffer = new byte[1];
fs.Read(buffer, 0, buffer.Length);
header.fps = buffer[0];
//pad (2 byte)
fs.ReadByte();
fs.ReadByte();
//sample rate (4 bytes integer)
buffer = new byte[4];
fs.Read(buffer, 0, buffer.Length);
header.samplerate = BitConverter.ToInt32(buffer, 0);
//audio_id (4 bytes integer)
fs.Read(buffer, 0, buffer.Length);
header.audio_id = (audio_id)Enum.Parse(typeof(audio_id), BitConverter.ToInt32(buffer, 0).ToString());
//audio start offset (4 bytes integer)
fs.Read(buffer, 0, buffer.Length);
header.aoffset = BitConverter.ToInt32(buffer, 0);
//audio size (4 bytes integer):
fs.Read(buffer, 0, buffer.Length);
header.asize = BitConverter.ToInt32(buffer, 0);
//video start offset (4 bytes integer)
fs.Read(buffer, 0, buffer.Length);
header.voffset = BitConverter.ToInt32(buffer, 0);
//video size (4 bytes integer)
fs.Read(buffer, 0, buffer.Length);
header.vsize = BitConverter.ToInt32(buffer, 0);
if (header.version == version_id.DPG2 ||
header.version == version_id.DPG3)
{
//gop offset
fs.Read(buffer, 0, buffer.Length);
header.goffset = BitConverter.ToInt32(buffer, 0);
//gop size
fs.Read(buffer, 0, buffer.Length);
header.gsize = BitConverter.ToInt32(buffer, 0);
}
//проверка на целостность
if ((fs.Length - (header.aoffset + header.asize + header.vsize)) == 0)
header.complete = true;
else
header.complete = false;
}
return header;
}
