Initial revision

CVS patchset: 1
CVS date: 2001/04/18 22:33:39

1 files changed, 179 insertions, 0 deletions

diff --git a/src/xine-engine/metronom.h b/src/xine-engine/metronom.h
new file mode 100644
index 000000000..a16b9ef20
--- /dev/null
+++ b/src/xine-engine/metronom.h
@@ -0,0 +1,179 @@
+/* 
+ * Copyright (C) 2000-2001 the xine project
+ * 
+ * This file is part of xine, a unix video player.
+ * 
+ * xine is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * xine is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+ *
+ * $Id: metronom.h,v 1.1 2001/04/18 22:36:07 f1rmb Exp $
+ *
+ * metronom: general pts => virtual calculation/assoc
+ *                   
+ * virtual pts: unit 1/90000 sec, always increasing
+ *              can be used for synchronization
+ *              video/audio frame with same pts also have same vpts
+ *              but pts is likely to differ from vpts
+ *
+ */
+
+
+#ifndef HAVE_METRONOM_H
+#define HAVE_METRONOM_H
+
+#include <inttypes.h>
+#include <sys/time.h>
+
+typedef struct metronom_s metronom_t ;
+
+struct metronom_s {
+
+  /*
+   * clear all cached data, reset current vpts ... called if new input
+   * file is reached
+   */
+  
+  void (*reset) (metronom_t *this);
+
+  /*
+   * called by video output driver to inform metronom about current framerate
+   *
+   * parameter pts_per_frame : frame display duration in 1/90000 sec
+   */
+  void (*set_video_rate) (metronom_t *this, uint32_t pts_per_frame);
+
+  /*
+   * return current video rate (including delta corrections)
+   */
+
+  uint32_t (*get_video_rate) (metronom_t *this);
+
+  /*
+   * called by audio output driver to inform metronom about current audio
+   * bitrate
+   *
+   * parameter pts_per_smpls : 1/90000 sec per 65536 samples
+   */
+  void (*set_audio_rate) (metronom_t *this, uint32_t pts_per_smpls);
+
+  /*
+   * called by video output driver for *every* frame
+   *
+   * parameter pts: pts for frame if known, 0 otherwise
+   *
+   * return value: virtual pts for frame
+   *
+   */
+  
+  uint32_t (*got_video_frame) (metronom_t *this, uint32_t pts);
+
+  /*
+   * called by audio output driver whenever audio samples are delivered to it
+   *
+   * parameter pts      : pts for audio data if known, 0 otherwise
+   *           nsamples : number of samples delivered
+   *
+   * return value: virtual pts for audio data
+   *
+   */
+
+  uint32_t (*got_audio_samples) (metronom_t *this, uint32_t pts, uint32_t nsamples); 
+
+  /*
+   * called by SPU decoder whenever a packet is delivered to it
+   *
+   * parameter pts      : pts for SPU packet if known, 0 otherwise
+   *
+   * return value: virtual pts for SPU packet
+   *
+   */
+
+  uint32_t (*got_spu_packet) (metronom_t *this, uint32_t pts); 
+
+  /*
+   * manually correct audio <-> video sync
+   */
+  void (*set_av_offset) (metronom_t *this, int32_t pts);
+
+  int32_t (*get_av_offset) (metronom_t *this);
+
+  /*
+   * ****************************************
+   *       master clock functions
+   * ****************************************
+   */
+
+  /*
+   * start metronom clock (no clock reset)
+   */
+  void (*start_clock) (metronom_t *this, uint32_t pts);
+
+
+  /*
+   * stop metronom clock
+   */
+  void (*stop_clock) (metronom_t *this);
+
+
+  /*
+   * resume clock from where it was stopped
+   */
+  void (*resume_clock) (metronom_t *this);
+
+
+  /*
+   * get current clock value in vpts
+   */
+  uint32_t (*get_current_time) (metronom_t *this);
+
+
+  /*
+   * adjust master clock to external timer (e.g. audio hardware)
+   */
+  void (*adjust_clock) (metronom_t *this, uint32_t desired_pts);
+
+  /*
+   * metronom internal stuff
+   */
+
+  uint32_t        pts_per_frame;
+  uint32_t        pts_per_smpls;
+
+  int32_t         audio_pts_delta;
+
+  uint32_t        video_vpts;
+  uint32_t        audio_vpts;
+
+  uint32_t        sync_pts;
+  uint32_t        sync_vpts;
+
+  /* video delta for wrong framerates */
+  uint32_t        last_video_pts;
+  uint32_t        last_video_vpts;
+  int             num_video_vpts_guessed;
+  int32_t         video_pts_delta;
+
+  int             num_audio_samples_guessed;
+
+  int32_t         av_offset;
+
+  struct timeval  start_time;
+  uint32_t        start_pts, last_pts;
+  int             stopped ;
+};
+
+metronom_t *metronom_init ();
+
+#endif
+