From 7ec0ff2589ffd5774e78f9e6b436ea55be45deb1 Mon Sep 17 00:00:00 2001
From: jacqueline <me@jacqueline.id.au>
Date: Wed, 14 Feb 2024 12:21:33 +1100
Subject: Switch to the lowmem tremor branch

in addition to using slightly less memory, this branch also doesn't seem
to have the same issues with `-O2` builds that the main branch has.
---
 lib/tremor/codec_internal.h | 191 ++++++++++++++++++++++++++++++++++++--------
 1 file changed, 156 insertions(+), 35 deletions(-)

(limited to 'lib/tremor/codec_internal.h')

diff --git a/lib/tremor/codec_internal.h b/lib/tremor/codec_internal.h
index 3ca7f547..f9a768bb 100644
--- a/lib/tremor/codec_internal.h
+++ b/lib/tremor/codec_internal.h
@@ -1,12 +1,12 @@
 /********************************************************************
  *                                                                  *
- * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *
+ * THIS FILE IS PART OF THE TremorOggVorbis 'TREMOR' 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 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002    *
+ * THE TremorOggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003    *
  * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
  *                                                                  *
  ********************************************************************
@@ -18,36 +18,149 @@
 #ifndef _V_CODECI_H_
 #define _V_CODECI_H_
 
+#define CHUNKSIZE 1024
+
 #include "codebook.h"
+#include "ivorbiscodec.h"
+
+#define VI_TRANSFORMB 1
+#define VI_WINDOWB 1
+#define VI_TIMEB 1
+#define VI_FLOORB 2
+#define VI_RESB 3
+#define VI_MAPB 1
 
-typedef void vorbis_look_mapping;
-typedef void vorbis_look_floor;
-typedef void vorbis_look_residue;
-typedef void vorbis_look_transform;
+typedef void vorbis_info_floor;
+
+/* vorbis_dsp_state buffers the current vorbis audio
+   analysis/synthesis state.  The DSP state belongs to a specific
+   logical bitstream ****************************************************/
+struct vorbis_dsp_state{
+  vorbis_info    *vi;
+  tremor_oggpack_buffer  opb;
+
+  tremor_ogg_int32_t   **work;
+  tremor_ogg_int32_t   **mdctright;
+  int             out_begin;
+  int             out_end;
+
+  long lW;
+  long W;
+
+  tremor_ogg_int64_t granulepos;
+  tremor_ogg_int64_t sequence;
+  tremor_ogg_int64_t sample_count;
+
+};
+
+
+/* Floor backend generic *****************************************/
+
+extern vorbis_info_floor *floor0_info_unpack(vorbis_info *,tremor_oggpack_buffer *);
+extern void floor0_free_info(vorbis_info_floor *);
+extern int floor0_memosize(vorbis_info_floor *);
+extern tremor_ogg_int32_t *floor0_inverse1(struct vorbis_dsp_state *,
+				    vorbis_info_floor *,tremor_ogg_int32_t *);
+extern int floor0_inverse2 (struct vorbis_dsp_state *,vorbis_info_floor *,
+			    tremor_ogg_int32_t *buffer,tremor_ogg_int32_t *);
+
+extern vorbis_info_floor *floor1_info_unpack(vorbis_info *,tremor_oggpack_buffer *);
+extern void floor1_free_info(vorbis_info_floor *);
+extern int floor1_memosize(vorbis_info_floor *);
+extern tremor_ogg_int32_t *floor1_inverse1(struct vorbis_dsp_state *,
+				    vorbis_info_floor *,tremor_ogg_int32_t *);
+extern int floor1_inverse2 (struct vorbis_dsp_state *,vorbis_info_floor *,
+			    tremor_ogg_int32_t *buffer,tremor_ogg_int32_t *);
+
+typedef struct{
+  int   order;
+  long  rate;
+  long  barkmap;
+
+  int   ampbits;
+  int   ampdB;
+
+  int   numbooks; /* <= 16 */
+  char  books[16];
+
+} vorbis_info_floor0;
+
+typedef struct{
+  char  class_dim;        /* 1 to 8 */
+  char  class_subs;       /* 0,1,2,3 (bits: 1<<n poss) */
+  unsigned char  class_book;       /* subs ^ dim entries */
+  unsigned char  class_subbook[8]; /* [VIF_CLASS][subs] */
+} floor1class;  
+
+typedef struct{
+  floor1class  *class;          /* [VIF_CLASS] */
+  char         *partitionclass; /* [VIF_PARTS]; 0 to 15 */
+  tremor_ogg_uint16_t *postlist;       /* [VIF_POSIT+2]; first two implicit */ 
+  char         *forward_index;  /* [VIF_POSIT+2]; */
+  char         *hineighbor;     /* [VIF_POSIT]; */
+  char         *loneighbor;     /* [VIF_POSIT]; */
+
+  int          partitions;    /* 0 to 31 */
+  int          posts;
+  int          mult;          /* 1 2 3 or 4 */ 
+
+} vorbis_info_floor1;
+
+/* Residue backend generic *****************************************/
+
+typedef struct vorbis_info_residue{
+  int type;
+  unsigned char *stagemasks;
+  unsigned char *stagebooks;
+
+/* block-partitioned VQ coded straight residue */
+  long begin;
+  long end;
+
+  /* first stage (lossless partitioning) */
+  int           grouping;         /* group n vectors per partition */
+  char          partitions;       /* possible codebooks for a partition */
+  unsigned char groupbook;        /* huffbook for partitioning */
+  char          stages;
+} vorbis_info_residue;
+
+extern void res_clear_info(vorbis_info_residue *info);
+extern int res_unpack(vorbis_info_residue *info,
+		      vorbis_info *vi,tremor_oggpack_buffer *opb);
+extern int res_inverse(vorbis_dsp_state *,vorbis_info_residue *info,
+		       tremor_ogg_int32_t **in,int *nonzero,int ch);
 
 /* mode ************************************************************/
 typedef struct {
-  int blockflag;
-  int windowtype;
-  int transformtype;
-  int mapping;
+  unsigned char blockflag;
+  unsigned char mapping;
 } vorbis_info_mode;
 
-typedef void vorbis_info_floor;
-typedef void vorbis_info_residue;
-typedef void vorbis_info_mapping;
+/* Mapping backend generic *****************************************/
+typedef struct coupling_step{
+  unsigned char mag;
+  unsigned char ang;
+} coupling_step;
 
-typedef struct private_state {
-  /* local lookup storage */
-  const void             *window[2];
+typedef struct submap{
+  char floor;
+  char residue;
+} submap;
 
-  /* backend lookups are tied to the mode, not the backend or naked mapping */
-  int                     modebits;
-  vorbis_look_mapping   **mode;
+typedef struct vorbis_info_mapping{
+  int            submaps; 
+  
+  unsigned char *chmuxlist;
+  submap        *submaplist;
 
-  ogg_int64_t sample_count;
+  int            coupling_steps;
+  coupling_step *coupling;
+} vorbis_info_mapping;
 
-} private_state;
+extern int mapping_info_unpack(vorbis_info_mapping *,vorbis_info *,
+			       tremor_oggpack_buffer *);
+extern void mapping_clear_info(vorbis_info_mapping *);
+extern int mapping_inverse(struct vorbis_dsp_state *,vorbis_info_mapping *);
 
 /* codec_setup_info contains all the setup information specific to the
    specific compression/decompression mode in progress (eg,
@@ -69,24 +182,32 @@ typedef struct codec_setup_info {
 
   int        modes;
   int        maps;
-  int        times;
   int        floors;
   int        residues;
   int        books;
 
-  vorbis_info_mode       *mode_param[64];
-  int                     map_type[64];
-  vorbis_info_mapping    *map_param[64];
-  int                     time_type[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;
-
-  int    passlimit[32];     /* iteration limit per couple/quant pass */
-  int    coupling_passes;
+  vorbis_info_mode       *mode_param;
+  vorbis_info_mapping    *map_param;
+  char                   *floor_type;
+  vorbis_info_floor     **floor_param;
+  vorbis_info_residue    *residue_param;
+  codebook               *book_param;
+
 } codec_setup_info;
 
+extern vorbis_dsp_state *vorbis_dsp_create(vorbis_info *vi);
+extern void     vorbis_dsp_destroy(vorbis_dsp_state *v);
+extern int      vorbis_dsp_headerin(vorbis_info *vi,vorbis_comment *vc,
+				    tremor_ogg_packet *op);
+
+extern int      vorbis_dsp_restart(vorbis_dsp_state *v);
+extern int      vorbis_dsp_synthesis(vorbis_dsp_state *vd,
+				     tremor_ogg_packet *op,int decodep);
+extern int      vorbis_dsp_pcmout(vorbis_dsp_state *v,
+				  tremor_ogg_int16_t *pcm,int samples);
+extern int      vorbis_dsp_read(vorbis_dsp_state *v,int samples);
+extern long     vorbis_packet_blocksize(vorbis_info *vi,tremor_ogg_packet *op);
+
+
+
 #endif
-- 
cgit v1.2.3