private void ParseIdx1(BinaryReader br, uint chunk_size, int movi_start)
{
long start_pos = br.BaseStream.Position;
AviStream video_stream = GetVideoStream();
while (br.BaseStream.Position - start_pos < chunk_size)
{
IndexEntry index_entry = new IndexEntry();
index_entry.ckid = "";
for (int i = 0; i < 4; ++i)
{
index_entry.ckid += (char)br.ReadByte();
}
index_entry.flags = br.ReadUInt32();
index_entry.chunk_offset = movi_start + br.ReadInt32() + 8;
index_entry.chunk_length = br.ReadInt32();
int stream_num = (index_entry.ckid[0] - '0') * 10 + (index_entry.ckid[1] - '0');
stream_list_[stream_num].IndexSet.Add(index_entry);
}
if (br.BaseStream.Position < start_pos + chunk_size)
{
br.BaseStream.Seek(start_pos + chunk_size, SeekOrigin.Begin);
}
}
// 全フレームを反転させてファイルに書き込む。ファイルOpen時に is_edit を true にする必要がある
public void FlipAndWriteAll()
{
AviStream video_stream = GetVideoStream();
if (video_stream != null)
{
// ヘッダの高さがマイナス値になっている場合はプラスにする
//（このようにしないとVFWで読めない）
byte[] buff = new byte[1024];
file_stream_.Seek(0, SeekOrigin.Begin);
file_stream_.Read(buff, 0, buff.Length);
for (int i = 0; i < buff.Length - 20; ++i)
{
if (buff[i] == 's' && buff[i + 1] == 't' && buff[i + 2] == 'r' && buff[i + 3] == 'f')
{
int height = buff[i + 16] + buff[i + 17] * 256 + buff[i + 18] * 256 * 256 + buff[i + 19] * 256 * 256 * 256;
if (height < 0) // 高さがマイナスの場合だけ修正する
{
file_stream_.Seek(i + 16, SeekOrigin.Begin);
BinaryWriter writer = new BinaryWriter(file_stream_);
writer.Write(-height);
writer.Flush();
}
}
}
// 各画像の上下を反転させる
byte[] in_buff = new byte[video_stream.IndexSet[0].chunk_length];
byte[] out_buff = new byte[video_stream.IndexSet[0].chunk_length];
for (int i = 0; i < video_stream.GetLength(); ++i)
{
IndexEntry index_entry = video_stream.IndexSet[i];
file_stream_.Seek(index_entry.chunk_offset, SeekOrigin.Begin);
file_stream_.Read(in_buff, 0, index_entry.chunk_length);
for (int j = 0; j < in_buff.Length; ++j)
{
out_buff[(height_ - j / (3 * width_) - 1) * 3 * width_ + j % (3 * width_)] = in_buff[j];
}
file_stream_.Seek(index_entry.chunk_offset, SeekOrigin.Begin);
file_stream_.Write(out_buff, 0, index_entry.chunk_length);
}
}
}
public Bitmap GetFrame(int frame_number)
{
AviStream video_stream = GetVideoStream();
if (video_stream != null && frame_number < video_stream.IndexSet.Count)
{
IndexEntry index_entry = video_stream.IndexSet[frame_number];
byte[] buff = new byte[index_entry.chunk_length];
file_stream_.Seek(index_entry.chunk_offset, SeekOrigin.Begin);
file_stream_.Read(buff, 0, index_entry.chunk_length);
GCHandle handle = GCHandle.Alloc(buff, GCHandleType.Pinned);
Bitmap bitmap = new Bitmap(width_, height_, width_ * 3, PixelFormat.Format24bppRgb, handle.AddrOfPinnedObject());
handle.Free();
//bitmap.RotateFlip(RotateFlipType.RotateNoneFlipY);
return(bitmap);
}
else
{
return(new Bitmap(1, 1));
}
}
public void Parse(Stream stream)
{
BinaryReader br = new BinaryReader(stream);
uint riff_size = ParseHeader(br);
byte[] buff1 = new byte[1024];
int movi_start = 0;
AviStream video_stream = null;
long start = br.BaseStream.Position;
if (riff_size == 0)
{
riff_size = uint.MaxValue;
}
while (br.BaseStream.Position - start < riff_size && br.BaseStream.Position < br.BaseStream.Length)
{
br.Read(buff1, 0, 4);
if (Util.EqualsSubString(buff1, 0, 4, "LIST"))
{
long list_size = (long)br.ReadUInt32() - 4;
br.Read(buff1, 0, 4);
if (Util.EqualsSubString(buff1, 0, 4, "hdrl"))
{
ParseHdrl(br, (uint)list_size);
}
else if (Util.EqualsSubString(buff1, 0, 4, "movi"))
{
movi_start = (int)br.BaseStream.Position - 4;
if (list_size > 0)
{
br.BaseStream.Seek((long)list_size, SeekOrigin.Current);
}
else
{
br.BaseStream.Seek(0, SeekOrigin.End);
break;
}
}
else
{
// 無視
br.BaseStream.Seek((long)list_size, SeekOrigin.Current);
}
}
else // チャンクなら
{
uint chunk_size = br.ReadUInt32();
if (Util.EqualsSubString(buff1, 0, 4, "idx1"))
{
video_stream = GetVideoStream();
// AVI 2.0 の場合は解析する必要なし
if (video_stream != null && !video_stream.IndexSet.HasSuperIndex())
{
ParseIdx1(br, chunk_size, movi_start);
}
}
else
{
br.BaseStream.Seek((long)chunk_size, SeekOrigin.Current);
}
}
}
video_stream = GetVideoStream();
if (video_stream != null)
{
// IndexEntry が無いときは "??dc" を探してエントリーを作る
if (!video_stream.IndexSet.HasEntry())
{
video_stream.IndexSet.MakeIndex(br, movi_start);
}
}
}
public byte[] GetWave()
{
AviStream audio_stream = GetAudioStream();
return(audio_stream != null ? audio_stream.GetAllData(file_stream_) : null);
}
