public AudioEncoderStream(string Filename, EncoderInformation EncoderInfo)
{
// Initialize instance variables
m_filename = Filename;
m_disposed = m_fileOpen = false;
m_buffer = new FifoMemoryStream();
// Open FFmpeg
FFmpeg.av_register_all();
// Initialize the output format context
m_avFormatCtx = FFmpeg.av_alloc_format_context();
// Get output format
m_avFormatCtx.oformat = FFmpeg.guess_format(EncoderInfo.Codec.ShortName, null, null);
if (m_avFormatCtx.oformat != null)
throw new EncoderException("Could not find output format.");
FFmpeg.av_set_parameters(ref m_avFormatCtx, null);
// Initialize the new output stream
AVStream* stream = FFmpeg.av_new_stream(ref m_avFormatCtx, 1);
if (stream == null)
throw new EncoderException("Could not alloc output audio stream");
m_avStream = *stream;
// Initialize output codec context
m_avCodecCtx = *m_avStream.codec;
m_avCodecCtx.codec_id = EncoderInfo.Codec.CodecID;
m_avCodecCtx.codec_type = CodecType.CODEC_TYPE_AUDIO;
m_avCodecCtx.sample_rate = EncoderInfo.SampleRate;
m_avCodecCtx.channels = EncoderInfo.Channels;
m_avCodecCtx.bits_per_sample = EncoderInfo.SampleSize;
m_avCodecCtx.bit_rate = EncoderInfo.Bitrate;
if (EncoderInfo.VBR)
{
m_avCodecCtx.flags |= FFmpeg.CODEC_FLAG_QSCALE;
m_avCodecCtx.global_quality = EncoderInfo.FFmpegQualityScale;
}
// Open codec
AVCodec* outCodec = FFmpeg.avcodec_find_encoder(m_avCodecCtx.codec_id);
if (outCodec == null)
throw new EncoderException("Could not find encoder");
if (FFmpeg.avcodec_open(ref m_avCodecCtx, outCodec) < 0)
throw new EncoderException("Could not open codec.");
// Open and prep file
if (FFmpeg.url_fopen(ref m_avFormatCtx.pb, m_filename, FFmpeg.URL_WRONLY) < 0)
throw new EncoderException("Could not open output file.");
m_fileOpen = true;
FFmpeg.av_write_header(ref m_avFormatCtx);
}
public AudioEncoderStream(string Filename, EncoderInformation EncoderInfo)
{
// Initialize instance variables
m_filename = Filename;
m_disposed = m_fileOpen = false;
m_buffer = new FifoMemoryStream();
// Open FFmpeg
FFmpeg.av_register_all();
// Initialize the output format context
m_avFormatCtx = FFmpeg.av_alloc_format_context();
// Get output format
m_avFormatCtx.oformat = FFmpeg.guess_format(EncoderInfo.Codec.ShortName, null, null);
if (m_avFormatCtx.oformat != null)
{
throw new EncoderException("Could not find output format.");
}
FFmpeg.av_set_parameters(ref m_avFormatCtx, null);
// Initialize the new output stream
AVStream *stream = FFmpeg.av_new_stream(ref m_avFormatCtx, 1);
if (stream == null)
{
throw new EncoderException("Could not alloc output audio stream");
}
m_avStream = *stream;
// Initialize output codec context
m_avCodecCtx = *m_avStream.codec;
m_avCodecCtx.codec_id = EncoderInfo.Codec.CodecID;
m_avCodecCtx.codec_type = CodecType.CODEC_TYPE_AUDIO;
m_avCodecCtx.sample_rate = EncoderInfo.SampleRate;
m_avCodecCtx.channels = EncoderInfo.Channels;
m_avCodecCtx.bits_per_sample = EncoderInfo.SampleSize;
m_avCodecCtx.bit_rate = EncoderInfo.Bitrate;
if (EncoderInfo.VBR)
{
m_avCodecCtx.flags |= FFmpeg.CODEC_FLAG_QSCALE;
m_avCodecCtx.global_quality = EncoderInfo.FFmpegQualityScale;
}
// Open codec
AVCodec *outCodec = FFmpeg.avcodec_find_encoder(m_avCodecCtx.codec_id);
if (outCodec == null)
{
throw new EncoderException("Could not find encoder");
}
if (FFmpeg.avcodec_open(ref m_avCodecCtx, outCodec) < 0)
{
throw new EncoderException("Could not open codec.");
}
// Open and prep file
if (FFmpeg.url_fopen(ref m_avFormatCtx.pb, m_filename, FFmpeg.URL_WRONLY) < 0)
{
throw new EncoderException("Could not open output file.");
}
m_fileOpen = true;
FFmpeg.av_write_header(ref m_avFormatCtx);
}
