ref: 890b97fa08c541e020888c2514cadebe8b812d2e
dir: /sys/src/cmd/audio/libvorbis/codec_internal.h/
/******************************************************************** * * * 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 https://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