#define             GST_FFMPEG_PIPE_MUTEX_LOCK(m)

#define             GST_FFMPEG_PIPE_MUTEX_UNLOCK(m)

#define             GST_FFMPEG_PIPE_WAIT(m)

#define             GST_FFMPEG_PIPE_SIGNAL(m)

int
gst_ffmpeg_pipe_open (GstFFMpegPipe *ffpipe,
                      int flags,
                      AVIOContext **context);

int
gst_ffmpeg_pipe_close (AVIOContext *h);

int
gst_ffmpegdata_open (GstPad *pad,
                     int flags,
                     AVIOContext **context);

int
gst_ffmpegdata_close (AVIOContext *h);

struct GstFFMpegPipe {
  /* lock for syncing */
  GMutex tlock;
  /* with TLOCK */
  /* signals counterpart thread to have a look */
  GCond cond;
  /* seen eos */
  gboolean eos;
  /* flowreturn obtained by src task */
  GstFlowReturn srcresult;
  /* adpater collecting data */
  GstAdapter *adapter;
  /* amount needed in adapter by src task */
  guint needed;
};

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