1 /********************************************************************

2 * *

3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *

4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *

5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *

6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *

7 * *

8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *

9 * by the Xiph.Org Foundation http://www.xiph.org/ *

10 * *

11 ********************************************************************

12

13 function: bitrate tracking and management

14 last mod: $Id: bitrate.h 13293 2007-07-24 00:09:47Z xiphmont $

15

16 ********************************************************************/

17

18 #ifndef _V_BITRATE_H_

19 #define _V_BITRATE_H_

20

21 #include "vorbis/codec.h"

22 #include "codec_internal.h"

23 #include "os.h"

24

25 /* encode side bitrate tracking */

26 typedef struct bitrate_manager_state {

27 int managed;

28

29 long avg_reservoir;

30 long minmax_reservoir;

31 long avg_bitsper;

32 long min_bitsper;

33 long max_bitsper;

34

35 long short_per_long;

36 double avgfloat;

37

38 vorbis_block *vb;

39 int choice;

40 } bitrate_manager_state;

41

42 typedef struct bitrate_manager_info{

43 long avg_rate;

44 long min_rate;

45 long max_rate;

46 long reservoir_bits;

47 double reservoir_bias;

48

49 double slew_damp;

50

51 } bitrate_manager_info;

52

53 extern void vorbis_bitrate_init(vorbis_info *vi,bitrate_manager_state *bs);

54 extern void vorbis_bitrate_clear(bitrate_manager_state *bs);

55 extern int vorbis_bitrate_managed(vorbis_block *vb);

56 extern int vorbis_bitrate_addblock(vorbis_block *vb);

57 extern int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd, ogg_packet *op);

58

59 #endif