diff options
Diffstat (limited to 'lib/codec_internal.h')
| -rw-r--r-- | lib/codec_internal.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/lib/codec_internal.h b/lib/codec_internal.h new file mode 100644 index 0000000..e522be1 --- /dev/null +++ b/lib/codec_internal.h @@ -0,0 +1,166 @@ +/******************************************************************** + * * + * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * + * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * + * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * + * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * + * * + * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 * + * by the Xiph.Org Foundation http://www.xiph.org/ * + * * + ******************************************************************** + + function: libvorbis codec headers + + ********************************************************************/ + +#ifndef _V_CODECI_H_ +#define _V_CODECI_H_ + +#include "envelope.h" +#include "codebook.h" + +#define BLOCKTYPE_IMPULSE 0 +#define BLOCKTYPE_PADDING 1 +#define BLOCKTYPE_TRANSITION 0 +#define BLOCKTYPE_LONG 1 + +#define PACKETBLOBS 15 + +typedef struct vorbis_block_internal{ + float **pcmdelay; /* this is a pointer into local storage */ + float ampmax; + int blocktype; + + oggpack_buffer *packetblob[PACKETBLOBS]; /* initialized, must be freed; + blob [PACKETBLOBS/2] points to + the oggpack_buffer in the + main vorbis_block */ +} vorbis_block_internal; + +typedef void vorbis_look_floor; +typedef void vorbis_look_residue; +typedef void vorbis_look_transform; + +/* mode ************************************************************/ +typedef struct { + int blockflag; + int windowtype; + int transformtype; + int mapping; +} vorbis_info_mode; + +typedef void vorbis_info_floor; +typedef void vorbis_info_residue; +typedef void vorbis_info_mapping; + +#include "psy.h" +#include "bitrate.h" + +typedef struct private_state { + /* local lookup storage */ + envelope_lookup *ve; /* envelope lookup */ + int window[2]; + vorbis_look_transform **transform[2]; /* block, type */ + drft_lookup fft_look[2]; + + int modebits; + vorbis_look_floor **flr; + vorbis_look_residue **residue; + vorbis_look_psy *psy; + vorbis_look_psy_global *psy_g_look; + + /* local storage, only used on the encoding side. This way the + application does not need to worry about freeing some packets' + memory and not others'; packet storage is always tracked. + Cleared next call to a _dsp_ function */ + unsigned char *header; + unsigned char *header1; + unsigned char *header2; + + bitrate_manager_state bms; + + ogg_int64_t sample_count; +} private_state; + +/* codec_setup_info contains all the setup information specific to the + specific compression/decompression mode in progress (eg, + psychoacoustic settings, channel setup, options, codebook + etc). +*********************************************************************/ + +#include "highlevel.h" +typedef struct codec_setup_info { + + /* Vorbis supports only short and long blocks, but allows the + encoder to choose the sizes */ + + long blocksizes[2]; + + /* modes are the primary means of supporting on-the-fly different + blocksizes, different channel mappings (LR or M/A), + different residue backends, etc. Each mode consists of a + blocksize flag and a mapping (along with the mapping setup */ + + int modes; + int maps; + int floors; + int residues; + int books; + int psys; /* encode only */ + + vorbis_info_mode *mode_param[64]; + int map_type[64]; + vorbis_info_mapping *map_param[64]; + int floor_type[64]; + vorbis_info_floor *floor_param[64]; + int residue_type[64]; + vorbis_info_residue *residue_param[64]; + static_codebook *book_param[256]; + codebook *fullbooks; + + vorbis_info_psy *psy_param[4]; /* encode only */ + vorbis_info_psy_global psy_g_param; + + bitrate_manager_info bi; + highlevel_encode_setup hi; /* used only by vorbisenc.c. It's a + highly redundant structure, but + improves clarity of program flow. */ + int halfrate_flag; /* painless downsample for decode */ +} codec_setup_info; + +extern vorbis_look_psy_global *_vp_global_look(vorbis_info *vi); +extern void _vp_global_free(vorbis_look_psy_global *look); + + + +typedef struct { + int sorted_index[VIF_POSIT+2]; + int forward_index[VIF_POSIT+2]; + int reverse_index[VIF_POSIT+2]; + + int hineighbor[VIF_POSIT]; + int loneighbor[VIF_POSIT]; + int posts; + + int n; + int quant_q; + vorbis_info_floor1 *vi; + + long phrasebits; + long postbits; + long frames; +} vorbis_look_floor1; + + + +extern int *floor1_fit(vorbis_block *vb,vorbis_look_floor1 *look, + const float *logmdct, /* in */ + const float *logmask); +extern int *floor1_interpolate_fit(vorbis_block *vb,vorbis_look_floor1 *look, + int *A,int *B, + int del); +extern int floor1_encode(oggpack_buffer *opb,vorbis_block *vb, + vorbis_look_floor1 *look, + int *post,int *ilogmask); +#endif |