public override int Open(string filename)
{
bool r = Bass.BASS_Init(0, 48000, BASSInit.BASS_DEVICE_DEFAULT, IntPtr.Zero);
stream_in = Bass.BASS_StreamCreateFile(filename, 0, 0, BASSFlag.BASS_DEFAULT | BASSFlag.BASS_STREAM_DECODE);
// BASS_DEFAULT: output 32bit (16bit stereo)
if (stream_in == 0)
{
BASSError be = Bass.BASS_ErrorGetCode();
Trace.TraceInformation("Cmp3ogg: StreamCreateFile error: " + be.ToString());
}
nTotalPCMSize = Bass.BASS_ChannelGetLength(stream_in);
#region [ Getting WAVEFORMEX info ]
var chinfo = Bass.BASS_ChannelGetInfo(stream_in);
wfx = new CWin32.WAVEFORMATEX(
(ushort)1, // wFormatTag
(ushort)chinfo.chans, // nChannels
(uint)chinfo.freq, // nSamplesPerSec
(uint)(chinfo.freq * 2 * chinfo.chans), // nAvgBytesPerSec
(ushort)(2 * chinfo.chans), // nBlockAlign
16, // wBitsPerSample
0 // cbSize
);
#endregion
//string fn = Path.GetFileName(filename);
//Trace.TraceInformation("filename=" + fn + ", size=(decode): " + wavdata.Length + ", channelgetlength=" + _TotalPCMSize2 + ", " + _TotalPCMSize) ;
return(0);
}
public override int GetFormat(int nHandle, ref CWin32.WAVEFORMATEX wfx)
{
var chinfo = Bass.BASS_ChannelGetInfo(stream_in);
_wfx.wFormatTag = 1; // 1 == PCM
_wfx.nChannels = (ushort)chinfo.chans; //
_wfx.nSamplesPerSec = (uint)chinfo.freq; //
_wfx.nAvgBytesPerSec = (uint)(chinfo.freq * 2 * chinfo.chans); //
_wfx.nBlockAlign = (ushort)(2 * chinfo.chans); // 16bit * mono/stereo
_wfx.wBitsPerSample = 16;
//Debug.WriteLine("**WAVEFORMATEX** in Cmp3.cs from stream info");
//Debug.WriteLine("wFormatTag= " + 1);
//Debug.WriteLine("nChannels = " + chinfo.chans.ToString("X4"));
//Debug.WriteLine("nSamplesPerSec= " + chinfo.freq.ToString("X8"));
//Debug.WriteLine("nAvgBytesPerSec= " + (chinfo.freq * 4).ToString("X8"));
//Debug.WriteLine("nBlockAlign= " + (2 * chinfo.chans).ToString("X4"));
//Debug.WriteLine("wBitsPerSample= " + (16).ToString("X4"));
wfx = _wfx;
#region [ Debug info ]
//Debug.WriteLine("**WAVEFORMATEX** in Cmp3.cs from binary array");
//Debug.WriteLine("wFormatTag= " + wfx.wFormatTag.ToString("X4"));
//Debug.WriteLine("nChannels = " + wfx.nChannels.ToString("X4"));
//Debug.WriteLine("nSamplesPerSec= " + wfx.nSamplesPerSec.ToString("X8"));
//Debug.WriteLine("nAvgBytesPerSec= " + wfx.nAvgBytesPerSec.ToString("X8"));
//Debug.WriteLine("nBlockAlign= " + wfx.nBlockAlign.ToString("X4"));
//Debug.WriteLine("wBitsPerSample= " + wfx.wBitsPerSample.ToString("X4"));
//Debug.WriteLine("cbSize= " + wfx.cbSize.ToString("X4"));
#endregion
return(0);
}
public override int Open(string filename)
{
this._filename = filename;
bjxa = new bjxa.Decoder();
#region [ Reading XA headers, then store it ]
fs = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite); // Need to set FileShare flag, to avoid locking after Closer()
format = bjxa.ReadHeader(fs);
//string xaid = Encoding.ASCII.GetString( xah.id );
#region [ Debug info ]
//Debug.WriteLine( "**XAHEADER**" );
//Debug.WriteLine( "id= " + xaheader.id.ToString( "X8" ) );
//Debug.WriteLine( "nDataLen= " + xaheader.nDataLen.ToString( "X8" ) );
//Debug.WriteLine( "nSamples= " + xaheader.nSamples.ToString( "X8" ) );
//Debug.WriteLine( "nSamplesPerSec= " + xaheader.nSamplesPerSec.ToString( "X4" ) );
//Debug.WriteLine( "nBits= " + xaheader.nBits.ToString( "X2" ) );
//Debug.WriteLine( "nChannels= " + xaheader.nChannels.ToString( "X2" ) );
//Debug.WriteLine( "nLoopPtr= " + xaheader.nLoopPtr.ToString( "X8" ) );
//Debug.WriteLine( "befL[0]= " + xaheader.befL[ 0 ].ToString( "X4" ) );
//Debug.WriteLine( "befL[1]= " + xaheader.befL[ 1 ].ToString( "X4" ) );
//Debug.WriteLine( "befR[0]= " + xaheader.befR[ 0 ].ToString( "X4" ) );
//Debug.WriteLine( "befR[1]= " + xaheader.befR[ 1 ].ToString( "X4" ) );
#endregion
#endregion
#region [ Getting WAVEFORMEX info ]
wfx = new CWin32.WAVEFORMATEX(
(ushort)format.WaveFormatPcm, // wFormatTag
(ushort)format.Channels, // nChannels
format.SamplesRate, // nSamplesPerSec
format.WaveByteRate, // nAvgBytesPerSec
(ushort)format.WaveBlockAlign, // nBlockAlign
(ushort)format.SampleBits, // wBitsPerSample
0 // cbSize
);
#endregion
#region [ Debug info ]
//Debug.WriteLine( "**WAVEFORMATEX**" );
//Debug.WriteLine( "wFormatTag= " + waveformatex.wFormatTag.ToString( "X4" ) );
//Debug.WriteLine( "nChannels = " + waveformatex.nChannels.ToString( "X4" ) );
//Debug.WriteLine( "nSamplesPerSec= " + waveformatex.nSamplesPerSec.ToString( "X8" ) );
//Debug.WriteLine( "nAvgBytesPerSec= " + waveformatex.nAvgBytesPerSec.ToString( "X8" ) );
//Debug.WriteLine( "nBlockAlign= " + waveformatex.nBlockAlign.ToString( "X4" ) );
//Debug.WriteLine( "wBitsPerSample= " + waveformatex.wBitsPerSample.ToString( "X4" ) );
//Debug.WriteLine( "cbSize= " + waveformatex.cbSize.ToString( "X4" ) );
#endregion
nTotalPCMSize = (uint)format.DataLengthPcm;
return(0);
}
public override int GetFormat(int nHandle, ref CWin32.WAVEFORMATEX wfx)
{
#region [ WAVEFORMATEX構造体の手動コピー ]
wfx.nAvgBytesPerSec = waveformatex.nAvgBytesPerSec;
wfx.wBitsPerSample = waveformatex.wBitsPerSample;
wfx.nBlockAlign = waveformatex.nBlockAlign;
wfx.nChannels = waveformatex.nChannels;
wfx.wFormatTag = waveformatex.wFormatTag;
wfx.nSamplesPerSec = waveformatex.nSamplesPerSec;
return(0);
#endregion
}
private void SaveWav(string filename)
{
long _TotalPCMSize = (uint)format.DataLengthPcm;
CWin32.WAVEFORMATEX _wfx = wfx;
string outfile = Path.GetFileName(filename);
var fs2 = new FileStream(outfile + ".wav", FileMode.Create);
var st = new BinaryWriter(fs2);
st.Write(new byte[] { 0x52, 0x49, 0x46, 0x46 }, 0, 4); // 'RIFF'
st.Write((int)_TotalPCMSize + 44 - 8); // filesize - 8 [byte]；今は不明なので後で上書きする。
st.Write(new byte[] { 0x57, 0x41, 0x56, 0x45 }, 0, 4); // 'WAVE'
st.Write(new byte[] { 0x66, 0x6D, 0x74, 0x20 }, 0, 4); // 'fmt '
st.Write(new byte[] { 0x10, 0x00, 0x00, 0x00 }, 0, 4); // chunk size 16bytes
st.Write(new byte[] { 0x01, 0x00 }, 0, 2); // formatTag 0001 PCM
st.Write((short)_wfx.nChannels); // channels
st.Write((int)_wfx.nSamplesPerSec); // samples per sec
st.Write((int)_wfx.nAvgBytesPerSec); // avg bytesper sec
st.Write((short)_wfx.nBlockAlign); // blockalign = 16bit * mono/stereo
st.Write((short)_wfx.wBitsPerSample); // bitspersample = 16bits
st.Write(new byte[] { 0x64, 0x61, 0x74, 0x61 }, 0, 4); // 'data'
st.Write((int)_TotalPCMSize); // datasize
//var pcmbuf = new short[format.Blocks * format.BlockSizePcm];
//if (fs.Read(srcBuf, 0, srcBuf.Length) != srcBuf.Length)
//{
// string s = Path.GetFileName(filename);
// throw new Exception($"Failed to load xa data: {s}");
//}
//int ret = bjxa.Decode(srcBuf, pcmbuf, out long pcmBufLength);
int shortsize = (int)(format.Blocks * format.BlockSizePcm);
var pcmbuf_bytes = new byte[shortsize * 2];
for (int i = 0; i < shortsize; i++)
{
var b = BitConverter.GetBytes(pcmbuf[i]);
pcmbuf_bytes[i * 2] = b[0];
pcmbuf_bytes[i * 2 + 1] = b[1];
}
st.Write(pcmbuf_bytes);
Trace.TraceInformation($"wrote ({outfile}.wav) " + fs2.Length);
st.Dispose();
fs2.Dispose();
}
public abstract int GetFormat(int nHandle, ref CWin32.WAVEFORMATEX wfx);
public override int GetFormat(int nHandle, ref CWin32.WAVEFORMATEX wfx)
{
return(oggGetFormat(nHandle, ref wfx));
}
private static extern int oggGetFormat(int nHandle, ref CWin32.WAVEFORMATEX wfx);
public override int Open(string filename)
{
this.filename = filename;
#region [ XAヘッダと、XAデータの読み出し ]
xaheader = new XAHEADER();
using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) // FileShare を付けとかないと、Close() 後もロックがかかる??
{
using (BinaryReader br = new BinaryReader(fs))
{
xaheader.id = br.ReadUInt32();
xaheader.nDataLen = br.ReadUInt32();
xaheader.nSamples = br.ReadUInt32();
xaheader.nSamplesPerSec = br.ReadUInt16();
xaheader.nBits = br.ReadByte();
xaheader.nChannels = br.ReadByte();
xaheader.nLoopPtr = br.ReadUInt32();
xaheader.befL = new short[2];
xaheader.befR = new short[2];
xaheader.pad = new byte[4];
xaheader.befL[0] = br.ReadInt16();
xaheader.befL[1] = br.ReadInt16();
xaheader.befR[0] = br.ReadInt16();
xaheader.befR[1] = br.ReadInt16();
xaheader.pad = br.ReadBytes(4);
srcBuf = new byte[xaheader.nDataLen];
srcBuf = br.ReadBytes((int)xaheader.nDataLen);
}
}
//string xaid = Encoding.ASCII.GetString( xah.id );
#region [ デバッグ表示 ]
//Debug.WriteLine( "**XAHEADER**" );
//Debug.WriteLine( "id= " + xaheader.id.ToString( "X8" ) );
//Debug.WriteLine( "nDataLen= " + xaheader.nDataLen.ToString( "X8" ) );
//Debug.WriteLine( "nSamples= " + xaheader.nSamples.ToString( "X8" ) );
//Debug.WriteLine( "nSamplesPerSec= " + xaheader.nSamplesPerSec.ToString( "X4" ) );
//Debug.WriteLine( "nBits= " + xaheader.nBits.ToString( "X2" ) );
//Debug.WriteLine( "nChannels= " + xaheader.nChannels.ToString( "X2" ) );
//Debug.WriteLine( "nLoopPtr= " + xaheader.nLoopPtr.ToString( "X8" ) );
//Debug.WriteLine( "befL[0]= " + xaheader.befL[ 0 ].ToString( "X4" ) );
//Debug.WriteLine( "befL[1]= " + xaheader.befL[ 1 ].ToString( "X4" ) );
//Debug.WriteLine( "befR[0]= " + xaheader.befR[ 0 ].ToString( "X4" ) );
//Debug.WriteLine( "befR[1]= " + xaheader.befR[ 1 ].ToString( "X4" ) );
#endregion
#endregion
IntPtr hxas;
#region [ WAVEFORMEX情報の取得 ]
waveformatex = new CWin32.WAVEFORMATEX();
hxas = xaDecodeOpen(ref xaheader, out waveformatex);
if (hxas == null)
{
Trace.TraceError("Error: xa: Open(): xaDecodeOpen(): " + Path.GetFileName(filename));
return(-1);
}
#region [ デバッグ表示 ]
//Debug.WriteLine( "**WAVEFORMATEX**" );
//Debug.WriteLine( "wFormatTag= " + waveformatex.wFormatTag.ToString( "X4" ) );
//Debug.WriteLine( "nChannels = " + waveformatex.nChannels.ToString( "X4" ) );
//Debug.WriteLine( "nSamplesPerSec= " + waveformatex.nSamplesPerSec.ToString( "X8" ) );
//Debug.WriteLine( "nAvgBytesPerSec= " + waveformatex.nAvgBytesPerSec.ToString( "X8" ) );
//Debug.WriteLine( "nBlockAlign= " + waveformatex.nBlockAlign.ToString( "X4" ) );
//Debug.WriteLine( "wBitsPerSample= " + waveformatex.wBitsPerSample.ToString( "X4" ) );
//Debug.WriteLine( "cbSize= " + waveformatex.cbSize.ToString( "X4" ) );
#endregion
#endregion
this.nHandle = (int)hxas;
return((int)hxas);
}
//#region [ IDisposable 実装 ]
////-----------------
//private bool bDispose完了済み = false;
//public void Dispose()
//{
// if ( !this.bDispose完了済み )
// {
// if ( srcBuf != null )
// {
// srcBuf = null;
// }
// if ( dstBuf != null )
// {
// dstBuf = null;
// }
// if ( this.nHandle >= 0 )
// {
// this.Close( this.nHandle );
// this.nHandle = -1;
// }
// this.bDispose完了済み = true;
// }
//}
////-----------------
//#endregion
#if false
/// <summary>
/// xaファイルを読み込んで、wavにdecodeする
/// </summary>
/// <param name="filename">xaファイル名</param>
/// <param name="wavBuf">wavファイルが格納されるバッファ</param>
/// <returns></returns>
public bool Decode(string filename, out byte[] wavBuf)
{
// Debug.WriteLine( "xa: Decode: " + Path.GetFileName( filename ) );
#region [ XAヘッダと、XAデータの読み出し ]
xaheader = new XAHEADER();
byte[] xaBuf;
using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) // FileShare を付けとかないと、Close() 後もロックがかかる??
{
using (BinaryReader br = new BinaryReader(fs))
{
xaheader.id = br.ReadUInt32();
xaheader.nDataLen = br.ReadUInt32();
xaheader.nSamples = br.ReadUInt32();
xaheader.nSamplesPerSec = br.ReadUInt16();
xaheader.nBits = br.ReadByte();
xaheader.nChannels = br.ReadByte();
xaheader.nLoopPtr = br.ReadUInt32();
xaheader.befL = new short[2];
xaheader.befR = new short[2];
xaheader.pad = new byte[4];
xaheader.befL[0] = br.ReadInt16();
xaheader.befL[1] = br.ReadInt16();
xaheader.befR[0] = br.ReadInt16();
xaheader.befR[1] = br.ReadInt16();
xaheader.pad = br.ReadBytes(4);
xaBuf = new byte[xaheader.nDataLen];
xaBuf = br.ReadBytes((int)xaheader.nDataLen);
}
}
//string xaid = Encoding.ASCII.GetString( xah.id );
#region [ デバッグ表示 ]
//Debug.WriteLine( "**XAHEADER**" );
//Debug.WriteLine( "id= " + xaheader.id.ToString( "X8" ) );
//Debug.WriteLine( "nDataLen= " + xaheader.nDataLen.ToString( "X8" ) );
//Debug.WriteLine( "nSamples= " + xaheader.nSamples.ToString( "X8" ) );
//Debug.WriteLine( "nSamplesPerSec= " + xaheader.nSamplesPerSec.ToString( "X4" ) );
//Debug.WriteLine( "nBits= " + xaheader.nBits.ToString( "X2" ) );
//Debug.WriteLine( "nChannels= " + xaheader.nChannels.ToString( "X2" ) );
//Debug.WriteLine( "nLoopPtr= " + xaheader.nLoopPtr.ToString( "X8" ) );
//Debug.WriteLine( "befL[0]= " + xaheader.befL[ 0 ].ToString( "X4" ) );
//Debug.WriteLine( "befL[1]= " + xaheader.befL[ 1 ].ToString( "X4" ) );
//Debug.WriteLine( "befR[0]= " + xaheader.befR[ 0 ].ToString( "X4" ) );
//Debug.WriteLine( "befR[1]= " + xaheader.befR[ 1 ].ToString( "X4" ) );
#endregion
#endregion
object lockobj = new object();
lock ( lockobj ) // スレッドセーフじゃないかも知れないので、念のため
{
#region [ WAVEFORMEX情報の取得 ]
waveformatex = new CWin32.WAVEFORMATEX();
IntPtr hxas = xaDecodeOpen(ref xaheader, out waveformatex);
if (hxas == null)
{
Trace.TraceError("Error: xaDecodeOpen(): " + Path.GetFileName(filename));
wavBuf = null;
return(false);
}
#region [ デバッグ表示 ]
//Debug.WriteLine( "**WAVEFORMATEX**" );
//Debug.WriteLine( "wFormatTag= " + waveformatex.wFormatTag.ToString( "X4" ) );
//Debug.WriteLine( "nChannels = " + waveformatex.nChannels.ToString( "X4" ) );
//Debug.WriteLine( "nSamplesPerSec= " + waveformatex.nSamplesPerSec.ToString( "X8" ) );
//Debug.WriteLine( "nAvgBytesPerSec= " + waveformatex.nAvgBytesPerSec.ToString( "X8" ) );
//Debug.WriteLine( "nBlockAlign= " + waveformatex.nBlockAlign.ToString( "X4" ) );
//Debug.WriteLine( "wBitsPerSample= " + waveformatex.wBitsPerSample.ToString( "X4" ) );
//Debug.WriteLine( "cbSize= " + waveformatex.cbSize.ToString( "X4" ) );
#endregion
#endregion
#region [ データ長の取得 ]
uint dlen;
xaDecodeSize(hxas, xaheader.nDataLen, out dlen);
#region [ デバッグ表示 ]
//Debug.WriteLine( "**INTERNAL VALUE**" );
//Debug.WriteLine( "dlen= " + dlen );
#endregion
#endregion
#region [ xaデータのデコード ]
wavBuf = new byte[dlen];
xastreamheader = new XASTREAMHEADER();
unsafe
{
fixed(byte *pXaBuf = xaBuf, pWavBuf = wavBuf)
{
xastreamheader.pSrc = pXaBuf;
xastreamheader.nSrcLen = xaheader.nDataLen;
xastreamheader.nSrcUsed = 0;
xastreamheader.pDst = pWavBuf;
xastreamheader.nDstLen = dlen;
xastreamheader.nDstUsed = 0;
bool b = xaDecodeConvert(hxas, ref xastreamheader);
if (!b)
{
Trace.TraceError("Error: xaDecodeConvert(): " + Path.GetFileName(filename));
wavBuf = null;
return(false);
}
}
}
#region [ デバッグ表示 ]
//Debug.WriteLine( "**XASTREAMHEADER**" );
//Debug.WriteLine( "nSrcLen= " + xastreamheader.nSrcLen );
//Debug.WriteLine( "nSrcUsed= " + xastreamheader.nSrcUsed );
//Debug.WriteLine( "nDstLen= " + xastreamheader.nDstLen );
//Debug.WriteLine( "nDstUsed= " + xastreamheader.nDstUsed );
#endregion
#endregion
#region [ xaファイルのクローズ ]
bool bb = xaDecodeClose(hxas);
if (!bb)
{
Trace.TraceError("Error: xaDecodeClose(): " + Path.GetFileName(filename));
}
#endregion
}
return(true);
}
public static int AudioDecode(string filename, out byte[] buffer,
out int nPCMデータの先頭インデックス, out int totalPCMSize, out CWin32.WAVEFORMATEX wfx, bool enablechunk)
{
if (!File.Exists(filename))
{
throw new FileNotFoundException(filename + " not found...");
}
AVFormatContext *format_context = null;
if (ffmpeg.avformat_open_input(&format_context, filename, null, null) != 0)
{
throw new FileLoadException("avformat_open_input failed\n");
}
// get stream info
if (ffmpeg.avformat_find_stream_info(format_context, null) < 0)
{
throw new FileLoadException("avformat_find_stream_info failed\n");
}
// find audio stream
AVStream *audio_stream = null;
for (int i = 0; i < (int)format_context->nb_streams; i++)
{
if (format_context->streams[i]->codecpar->codec_type == AVMediaType.AVMEDIA_TYPE_AUDIO)
{
audio_stream = format_context->streams[i];
break;
}
}
if (audio_stream == null)
{
throw new FileLoadException("No audio stream ...\n");
}
// find decoder
AVCodec *codec = ffmpeg.avcodec_find_decoder(audio_stream->codecpar->codec_id);
if (codec == null)
{
throw new NotSupportedException("No supported decoder ...\n");
}
// alloc codec context
AVCodecContext *codec_context = ffmpeg.avcodec_alloc_context3(codec);
if (codec_context == null)
{
throw new OutOfMemoryException("avcodec_alloc_context3 failed\n");
}
// open codec
if (ffmpeg.avcodec_parameters_to_context(codec_context, audio_stream->codecpar) < 0)
{
Trace.WriteLine("avcodec_parameters_to_context failed\n");
}
if (ffmpeg.avcodec_open2(codec_context, codec, null) != 0)
{
Trace.WriteLine("avcodec_open2 failed\n");
}
// フレームの確保
AVFrame * frame = ffmpeg.av_frame_alloc();
AVPacket * packet = ffmpeg.av_packet_alloc();
SwrContext *swr = null;
byte * swr_buf = null;
int swr_buf_len = 0;
int ret;
int nFrame = 0;
int nSample = 0;
int pos = 0;
using (MemoryStream ms = new MemoryStream())
{
using (BinaryWriter bw = new BinaryWriter(ms))
{
if (enablechunk)
{
bw.Write(new byte[] { 0x52, 0x49, 0x46, 0x46 }); // 'RIFF'
bw.Write((UInt32)0); // ファイルサイズ - 8 [byte]；今は不明なので後で上書きする。
bw.Write(new byte[] { 0x57, 0x41, 0x56, 0x45 }); // 'WAVE'
bw.Write(new byte[] { 0x66, 0x6D, 0x74, 0x20 }); // 'fmt '
bw.Write((UInt32)(16)); // fmtチャンクのサイズ[byte]
bw.Write((UInt16)1); // フォーマットID（リニアPCMなら1）
bw.Write((UInt16)codec_context->channels); // チャンネル数
bw.Write((UInt32)codec_context->sample_rate); // サンプリングレート
bw.Write((UInt32)(16 / 8 * codec_context->channels * codec_context->sample_rate)); // データ速度
bw.Write((UInt16)(codec_context->channels * 16 / 8)); // ブロックサイズ
bw.Write((UInt16)16); // サンプルあたりのビット数
bw.Write(new byte[] { 0x64, 0x61, 0x74, 0x61 }); // 'data'
pos = (int)ms.Position;
bw.Write((UInt32)0);
}
while (true)
{
if (ffmpeg.av_read_frame(format_context, packet) < 0)
{
Trace.TraceError("av_read_frame eof or error.\n");
break; // eof or error
}
if (packet->stream_index == audio_stream->index)
{
if (ffmpeg.avcodec_send_packet(codec_context, packet) < 0)
{
Trace.TraceError("avcodec_send_packet error\n");
}
if ((ret = ffmpeg.avcodec_receive_frame(codec_context, frame)) < 0)
{
if (ret != ffmpeg.AVERROR(ffmpeg.EAGAIN))
{
Trace.TraceError("avcodec_receive_frame error.\n");
break;
}
}
else
{
nFrame++;
nSample += frame->nb_samples;
if ((AVSampleFormat)frame->format != AVSampleFormat.AV_SAMPLE_FMT_S16)
{
if (swr == null)
{
swr = ffmpeg.swr_alloc();
if (swr == null)
{
Trace.TraceError("swr_alloc error.\n");
break;
}
ffmpeg.av_opt_set_int(swr, "in_channel_layout", (long)frame->channel_layout, 0);
ffmpeg.av_opt_set_int(swr, "out_channel_layout", (long)frame->channel_layout, 0);
ffmpeg.av_opt_set_int(swr, "in_sample_rate", frame->sample_rate, 0);
ffmpeg.av_opt_set_int(swr, "out_sample_rate", frame->sample_rate, 0);
ffmpeg.av_opt_set_sample_fmt(swr, "in_sample_fmt", (AVSampleFormat)frame->format, 0);
ffmpeg.av_opt_set_sample_fmt(swr, "out_sample_fmt", AVSampleFormat.AV_SAMPLE_FMT_S16, 0);
ret = ffmpeg.swr_init(swr);
if (ret < 0)
{
Trace.TraceError("swr_init error.\n");
break;
}
swr_buf_len = ffmpeg.av_samples_get_buffer_size(null, frame->channels, frame->sample_rate, AVSampleFormat.AV_SAMPLE_FMT_S16, 1);
swr_buf = (byte *)ffmpeg.av_malloc((ulong)swr_buf_len);
}
ret = ffmpeg.swr_convert(swr, &swr_buf, frame->nb_samples, frame->extended_data, frame->nb_samples);
for (int index = 0; index < frame->nb_samples * (16 / 8) * frame->channels; index++)
{
bw.Write(swr_buf[index]);
}
}
else
{
for (int index = 0; index < frame->nb_samples * (16 / 8) * frame->channels; index++)
{
bw.Write((*(frame->extended_data))[index]);
}
}
}
}
ffmpeg.av_packet_unref(packet);
}
if (enablechunk)
{
bw.Seek(4, SeekOrigin.Begin);
bw.Write((UInt32)ms.Length - 8); // ファイルサイズ - 8 [byte]
bw.Seek(pos, SeekOrigin.Begin);
bw.Write((UInt32)ms.Length - (pos + 4)); // dataチャンクサイズ [byte]
}
bw.Close();
Debug.Print("Frames=" + nFrame + "\n" + "Samples=" + nSample);
buffer = ms.ToArray();
}
}
nPCMデータの先頭インデックス = pos;
totalPCMSize = buffer.Length;
wfx = new CWin32.WAVEFORMATEX(1, (ushort)codec_context->channels, (uint)codec_context->sample_rate, (uint)(16 / 8 * codec_context->channels * codec_context->sample_rate), (ushort)(codec_context->channels * 16 / 8), 16);
ffmpeg.av_free((void *)swr_buf);
ffmpeg.av_frame_free(&frame);
ffmpeg.avcodec_free_context(&codec_context);
ffmpeg.avformat_close_input(&format_context);
return(0);
}