public static AVCodecCfg CreateAudio(int channels, int sample_rate, int codec_id = (int)AVCode.CODEC_ID_H264, int bit_rate = 64000)
{
var r = new AVCodecCfg();
r.codec_id = codec_id;
r.codec_type = (int)AVCode.CODEC_TYPE_AUDIO;
r.bit_rate = bit_rate;
r.time_base_den = 0;
r.time_base_num = 0;
r.gop_size = 0;
r.pix_fmt = 0;
r.max_b_frames = 0;
r.sample_rate = sample_rate;
r.channels = channels;
return(r);
}
public static AVCodecCfg CreateVideo(int width, int height, int codec_id = (int)AVCode.CODEC_ID_H264, int bit_rate = 98000)
{
var r = new AVCodecCfg
{
codec_id = codec_id,
width = width,
height = height,
codec_type = (int)AVCode.CODEC_TYPE_VIDEO,
bit_rate = bit_rate,
time_base_den = 15,
time_base_num = 2,
gop_size = 15,
pix_fmt = (int)AVCode.PIX_FMT_YUV420P
};
return(r);
}
public FFImp(AVCodecCfg cfg, bool isDec, bool isvideo = true)
{
this.isDec = isDec;
this.cfg = cfg;
var pcfg = FunctionEx.StructToIntPtr(cfg);
pAVObj = FunctionEx.StructToIntPtr(new AVModel());
lock (_lock) {
if (!ffimp_init())
{
throw new Exception("ffimp init error");
}
}
if (isvideo)
{
int pOutBufSize = cfg.width * cfg.height * 3;
if (pOutBufSize == 0)
{
pOutBufSize = 1920 * 1080 * 4;
}
pOutBuf = Marshal.AllocHGlobal(pOutBufSize);
int init_r = 0;
lock (_lock)
{
if (this.isDec)
{
init_r = ffimp_video_decode_init(ref pAVObj, pcfg, pOutBuf, pOutBufSize);
}
else
{
init_r = ffimp_video_encode_init(ref pAVObj, pcfg, pOutBuf, pOutBufSize);
}
_ffscale = new FFScale(cfg.width, cfg.height, 0, 12, cfg.width, cfg.height, 0, 12);
}
}
else
{
int pOutBufSize = cfg.width * cfg.height * 3;
if (pOutBufSize == 0)
{
pOutBufSize = 2048 * 2;
}
pOutBuf = Marshal.AllocHGlobal(pOutBufSize);
int init_r = 0;
lock (_lock)
{
if (this.isDec)
{
init_r = ffimp_audio_decode_init(ref pAVObj, pcfg, pOutBuf, pOutBufSize);
}
else
{
init_r = ffimp_audio_decode_init(ref pAVObj, pcfg, pOutBuf, pOutBufSize);
}
// _ffscale = new FFScale(cfg.width, cfg.height, 0, 12, cfg.width, cfg.height, 0, 12);
}
}
Marshal.FreeHGlobal(pcfg);
}
