private void Clear()
{
format_context = null;
p_avformat_context = IntPtr.Zero;
p_video_codec = IntPtr.Zero;
p_audio_codec = IntPtr.Zero;
video_stream_index = -1;
audio_stream_index = -1;
video_codec_context = null;
audio_codec_context = null;
video_stream = null;
audio_stream = null;
p_frame = IntPtr.Zero;
p_frame_rgb = IntPtr.Zero;
p_packet = IntPtr.Zero;
if (p_audio_buffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(p_audio_buffer);
p_audio_buffer = IntPtr.Zero;
}
video_buffer_manager_ = null;
audio_buffer_manager_ = null;
video_rate_ = 24;
video_scale_ = 1;
key_frame_list_ = new List <int>();
key_dts_list_ = new List <long>();
current_frame_ = 0;
last_requested_frame_ = 0;
audio_priority_times_ = 0;
av_packet_queue_ = new Queue <PacketContainer>();
thread_end_event_ = new ManualResetEvent(true);
command_queue_ = new List <Command>();
fixed_video_width_ = -1;
fixed_video_height_ = -1;
}
private void OpenCodec(string filename)
{
AVCodecAPI.av_register_all();
int error_code = AVCodecAPI.av_open_input_file(out p_avformat_context, filename, IntPtr.Zero, 0, IntPtr.Zero);
if (error_code != 0)
{
throw new AVCodecCannotOpenFileException();
}
error_code = AVCodecAPI.av_find_stream_info(p_avformat_context);
if (error_code < 0)
{
throw new AVCodecException();
}
format_context = (AVFormatContext)Marshal.PtrToStructure(p_avformat_context, typeof(AVFormatContext));
for (int i = 0; i < format_context.nb_streams; ++i)
{
AVStream stream = (AVStream)Marshal.PtrToStructure(format_context.streams[i], typeof(AVStream));
AVCodecContext temp_codec_context = (AVCodecContext)Marshal.PtrToStructure(stream.codec,
typeof(AVCodecContext));
if (temp_codec_context.codec_type == 0)
{
if (video_stream_index < 0)
{
video_stream_index = i;
video_stream = stream;
video_codec_context = temp_codec_context;
}
}
else if (temp_codec_context.codec_type == 1)
{
if (audio_stream_index < 0)
{
audio_stream_index = i;
audio_stream = stream;
audio_codec_context = temp_codec_context;
}
}
}
if (video_stream_index >= 0)
{
p_video_codec = AVCodecAPI.avcodec_find_decoder(video_codec_context.codec_id);
error_code = AVCodecAPI.avcodec_open(video_stream.codec, p_video_codec);
if (error_code < 0)
{
throw new AVCodecException();
}
}
if (audio_stream_index >= 0)
{
p_audio_codec = AVCodecAPI.avcodec_find_decoder(audio_codec_context.codec_id);
error_code = AVCodecAPI.avcodec_open(audio_stream.codec, p_audio_codec);
if (error_code < 0)
{
throw new AVCodecException();
}
}
}