Line data Source code
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 1994-2010 *
9 : * by the Xiph.Org Foundation http://www.xiph.org/ *
10 : * *
11 : ********************************************************************
12 :
13 : function: channel mapping 0 implementation
14 : last mod: $Id$
15 :
16 : ********************************************************************/
17 :
18 : #include <stdlib.h>
19 : #include <stdio.h>
20 : #include <string.h>
21 : #include <math.h>
22 : #include <ogg/ogg.h>
23 : #include "vorbis/codec.h"
24 : #include "codec_internal.h"
25 : #include "codebook.h"
26 : #include "window.h"
27 : #include "registry.h"
28 : #include "psy.h"
29 : #include "misc.h"
30 :
31 : /* simplistic, wasteful way of doing this (unique lookup for each
32 : mode/submapping); there should be a central repository for
33 : identical lookups. That will require minor work, so I'm putting it
34 : off as low priority.
35 :
36 : Why a lookup for each backend in a given mode? Because the
37 : blocksize is set by the mode, and low backend lookups may require
38 : parameters from other areas of the mode/mapping */
39 :
40 0 : static void mapping0_free_info(vorbis_info_mapping *i){
41 0 : vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)i;
42 0 : if(info){
43 0 : memset(info,0,sizeof(*info));
44 0 : _ogg_free(info);
45 : }
46 0 : }
47 :
48 0 : static void mapping0_pack(vorbis_info *vi,vorbis_info_mapping *vm,
49 : oggpack_buffer *opb){
50 : int i;
51 0 : vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)vm;
52 :
53 : /* another 'we meant to do it this way' hack... up to beta 4, we
54 : packed 4 binary zeros here to signify one submapping in use. We
55 : now redefine that to mean four bitflags that indicate use of
56 : deeper features; bit0:submappings, bit1:coupling,
57 : bit2,3:reserved. This is backward compatable with all actual uses
58 : of the beta code. */
59 :
60 0 : if(info->submaps>1){
61 0 : oggpack_write(opb,1,1);
62 0 : oggpack_write(opb,info->submaps-1,4);
63 : }else
64 0 : oggpack_write(opb,0,1);
65 :
66 0 : if(info->coupling_steps>0){
67 0 : oggpack_write(opb,1,1);
68 0 : oggpack_write(opb,info->coupling_steps-1,8);
69 :
70 0 : for(i=0;i<info->coupling_steps;i++){
71 0 : oggpack_write(opb,info->coupling_mag[i],ov_ilog(vi->channels-1));
72 0 : oggpack_write(opb,info->coupling_ang[i],ov_ilog(vi->channels-1));
73 : }
74 : }else
75 0 : oggpack_write(opb,0,1);
76 :
77 0 : oggpack_write(opb,0,2); /* 2,3:reserved */
78 :
79 : /* we don't write the channel submappings if we only have one... */
80 0 : if(info->submaps>1){
81 0 : for(i=0;i<vi->channels;i++)
82 0 : oggpack_write(opb,info->chmuxlist[i],4);
83 : }
84 0 : for(i=0;i<info->submaps;i++){
85 0 : oggpack_write(opb,0,8); /* time submap unused */
86 0 : oggpack_write(opb,info->floorsubmap[i],8);
87 0 : oggpack_write(opb,info->residuesubmap[i],8);
88 : }
89 0 : }
90 :
91 : /* also responsible for range checking */
92 0 : static vorbis_info_mapping *mapping0_unpack(vorbis_info *vi,oggpack_buffer *opb){
93 : int i,b;
94 0 : vorbis_info_mapping0 *info=_ogg_calloc(1,sizeof(*info));
95 0 : codec_setup_info *ci=vi->codec_setup;
96 0 : memset(info,0,sizeof(*info));
97 0 : if(vi->channels<=0)goto err_out;
98 :
99 0 : b=oggpack_read(opb,1);
100 0 : if(b<0)goto err_out;
101 0 : if(b){
102 0 : info->submaps=oggpack_read(opb,4)+1;
103 0 : if(info->submaps<=0)goto err_out;
104 : }else
105 0 : info->submaps=1;
106 :
107 0 : b=oggpack_read(opb,1);
108 0 : if(b<0)goto err_out;
109 0 : if(b){
110 0 : info->coupling_steps=oggpack_read(opb,8)+1;
111 0 : if(info->coupling_steps<=0)goto err_out;
112 0 : for(i=0;i<info->coupling_steps;i++){
113 : /* vi->channels > 0 is enforced in the caller */
114 0 : int testM=info->coupling_mag[i]=
115 0 : oggpack_read(opb,ov_ilog(vi->channels-1));
116 0 : int testA=info->coupling_ang[i]=
117 0 : oggpack_read(opb,ov_ilog(vi->channels-1));
118 :
119 0 : if(testM<0 ||
120 0 : testA<0 ||
121 0 : testM==testA ||
122 0 : testM>=vi->channels ||
123 0 : testA>=vi->channels) goto err_out;
124 : }
125 :
126 : }
127 :
128 0 : if(oggpack_read(opb,2)!=0)goto err_out; /* 2,3:reserved */
129 :
130 0 : if(info->submaps>1){
131 0 : for(i=0;i<vi->channels;i++){
132 0 : info->chmuxlist[i]=oggpack_read(opb,4);
133 0 : if(info->chmuxlist[i]>=info->submaps || info->chmuxlist[i]<0)goto err_out;
134 : }
135 : }
136 0 : for(i=0;i<info->submaps;i++){
137 0 : oggpack_read(opb,8); /* time submap unused */
138 0 : info->floorsubmap[i]=oggpack_read(opb,8);
139 0 : if(info->floorsubmap[i]>=ci->floors || info->floorsubmap[i]<0)goto err_out;
140 0 : info->residuesubmap[i]=oggpack_read(opb,8);
141 0 : if(info->residuesubmap[i]>=ci->residues || info->residuesubmap[i]<0)goto err_out;
142 : }
143 :
144 0 : return info;
145 :
146 : err_out:
147 0 : mapping0_free_info(info);
148 0 : return(NULL);
149 : }
150 :
151 : #include "os.h"
152 : #include "lpc.h"
153 : #include "lsp.h"
154 : #include "envelope.h"
155 : #include "mdct.h"
156 : #include "psy.h"
157 : #include "scales.h"
158 :
159 : #if 0
160 : static long seq=0;
161 : static ogg_int64_t total=0;
162 : static float FLOOR1_fromdB_LOOKUP[256]={
163 : 1.0649863e-07F, 1.1341951e-07F, 1.2079015e-07F, 1.2863978e-07F,
164 : 1.3699951e-07F, 1.4590251e-07F, 1.5538408e-07F, 1.6548181e-07F,
165 : 1.7623575e-07F, 1.8768855e-07F, 1.9988561e-07F, 2.128753e-07F,
166 : 2.2670913e-07F, 2.4144197e-07F, 2.5713223e-07F, 2.7384213e-07F,
167 : 2.9163793e-07F, 3.1059021e-07F, 3.3077411e-07F, 3.5226968e-07F,
168 : 3.7516214e-07F, 3.9954229e-07F, 4.2550680e-07F, 4.5315863e-07F,
169 : 4.8260743e-07F, 5.1396998e-07F, 5.4737065e-07F, 5.8294187e-07F,
170 : 6.2082472e-07F, 6.6116941e-07F, 7.0413592e-07F, 7.4989464e-07F,
171 : 7.9862701e-07F, 8.5052630e-07F, 9.0579828e-07F, 9.6466216e-07F,
172 : 1.0273513e-06F, 1.0941144e-06F, 1.1652161e-06F, 1.2409384e-06F,
173 : 1.3215816e-06F, 1.4074654e-06F, 1.4989305e-06F, 1.5963394e-06F,
174 : 1.7000785e-06F, 1.8105592e-06F, 1.9282195e-06F, 2.0535261e-06F,
175 : 2.1869758e-06F, 2.3290978e-06F, 2.4804557e-06F, 2.6416497e-06F,
176 : 2.8133190e-06F, 2.9961443e-06F, 3.1908506e-06F, 3.3982101e-06F,
177 : 3.6190449e-06F, 3.8542308e-06F, 4.1047004e-06F, 4.3714470e-06F,
178 : 4.6555282e-06F, 4.9580707e-06F, 5.2802740e-06F, 5.6234160e-06F,
179 : 5.9888572e-06F, 6.3780469e-06F, 6.7925283e-06F, 7.2339451e-06F,
180 : 7.7040476e-06F, 8.2047000e-06F, 8.7378876e-06F, 9.3057248e-06F,
181 : 9.9104632e-06F, 1.0554501e-05F, 1.1240392e-05F, 1.1970856e-05F,
182 : 1.2748789e-05F, 1.3577278e-05F, 1.4459606e-05F, 1.5399272e-05F,
183 : 1.6400004e-05F, 1.7465768e-05F, 1.8600792e-05F, 1.9809576e-05F,
184 : 2.1096914e-05F, 2.2467911e-05F, 2.3928002e-05F, 2.5482978e-05F,
185 : 2.7139006e-05F, 2.8902651e-05F, 3.0780908e-05F, 3.2781225e-05F,
186 : 3.4911534e-05F, 3.7180282e-05F, 3.9596466e-05F, 4.2169667e-05F,
187 : 4.4910090e-05F, 4.7828601e-05F, 5.0936773e-05F, 5.4246931e-05F,
188 : 5.7772202e-05F, 6.1526565e-05F, 6.5524908e-05F, 6.9783085e-05F,
189 : 7.4317983e-05F, 7.9147585e-05F, 8.4291040e-05F, 8.9768747e-05F,
190 : 9.5602426e-05F, 0.00010181521F, 0.00010843174F, 0.00011547824F,
191 : 0.00012298267F, 0.00013097477F, 0.00013948625F, 0.00014855085F,
192 : 0.00015820453F, 0.00016848555F, 0.00017943469F, 0.00019109536F,
193 : 0.00020351382F, 0.00021673929F, 0.00023082423F, 0.00024582449F,
194 : 0.00026179955F, 0.00027881276F, 0.00029693158F, 0.00031622787F,
195 : 0.00033677814F, 0.00035866388F, 0.00038197188F, 0.00040679456F,
196 : 0.00043323036F, 0.00046138411F, 0.00049136745F, 0.00052329927F,
197 : 0.00055730621F, 0.00059352311F, 0.00063209358F, 0.00067317058F,
198 : 0.00071691700F, 0.00076350630F, 0.00081312324F, 0.00086596457F,
199 : 0.00092223983F, 0.00098217216F, 0.0010459992F, 0.0011139742F,
200 : 0.0011863665F, 0.0012634633F, 0.0013455702F, 0.0014330129F,
201 : 0.0015261382F, 0.0016253153F, 0.0017309374F, 0.0018434235F,
202 : 0.0019632195F, 0.0020908006F, 0.0022266726F, 0.0023713743F,
203 : 0.0025254795F, 0.0026895994F, 0.0028643847F, 0.0030505286F,
204 : 0.0032487691F, 0.0034598925F, 0.0036847358F, 0.0039241906F,
205 : 0.0041792066F, 0.0044507950F, 0.0047400328F, 0.0050480668F,
206 : 0.0053761186F, 0.0057254891F, 0.0060975636F, 0.0064938176F,
207 : 0.0069158225F, 0.0073652516F, 0.0078438871F, 0.0083536271F,
208 : 0.0088964928F, 0.009474637F, 0.010090352F, 0.010746080F,
209 : 0.011444421F, 0.012188144F, 0.012980198F, 0.013823725F,
210 : 0.014722068F, 0.015678791F, 0.016697687F, 0.017782797F,
211 : 0.018938423F, 0.020169149F, 0.021479854F, 0.022875735F,
212 : 0.024362330F, 0.025945531F, 0.027631618F, 0.029427276F,
213 : 0.031339626F, 0.033376252F, 0.035545228F, 0.037855157F,
214 : 0.040315199F, 0.042935108F, 0.045725273F, 0.048696758F,
215 : 0.051861348F, 0.055231591F, 0.058820850F, 0.062643361F,
216 : 0.066714279F, 0.071049749F, 0.075666962F, 0.080584227F,
217 : 0.085821044F, 0.091398179F, 0.097337747F, 0.10366330F,
218 : 0.11039993F, 0.11757434F, 0.12521498F, 0.13335215F,
219 : 0.14201813F, 0.15124727F, 0.16107617F, 0.17154380F,
220 : 0.18269168F, 0.19456402F, 0.20720788F, 0.22067342F,
221 : 0.23501402F, 0.25028656F, 0.26655159F, 0.28387361F,
222 : 0.30232132F, 0.32196786F, 0.34289114F, 0.36517414F,
223 : 0.38890521F, 0.41417847F, 0.44109412F, 0.46975890F,
224 : 0.50028648F, 0.53279791F, 0.56742212F, 0.60429640F,
225 : 0.64356699F, 0.68538959F, 0.72993007F, 0.77736504F,
226 : 0.82788260F, 0.88168307F, 0.9389798F, 1.F,
227 : };
228 :
229 : #endif
230 :
231 :
232 0 : static int mapping0_forward(vorbis_block *vb){
233 0 : vorbis_dsp_state *vd=vb->vd;
234 0 : vorbis_info *vi=vd->vi;
235 0 : codec_setup_info *ci=vi->codec_setup;
236 0 : private_state *b=vb->vd->backend_state;
237 0 : vorbis_block_internal *vbi=(vorbis_block_internal *)vb->internal;
238 0 : int n=vb->pcmend;
239 : int i,j,k;
240 :
241 0 : int *nonzero = alloca(sizeof(*nonzero)*vi->channels);
242 0 : float **gmdct = _vorbis_block_alloc(vb,vi->channels*sizeof(*gmdct));
243 0 : int **iwork = _vorbis_block_alloc(vb,vi->channels*sizeof(*iwork));
244 0 : int ***floor_posts = _vorbis_block_alloc(vb,vi->channels*sizeof(*floor_posts));
245 :
246 0 : float global_ampmax=vbi->ampmax;
247 0 : float *local_ampmax=alloca(sizeof(*local_ampmax)*vi->channels);
248 0 : int blocktype=vbi->blocktype;
249 :
250 0 : int modenumber=vb->W;
251 0 : vorbis_info_mapping0 *info=ci->map_param[modenumber];
252 0 : vorbis_look_psy *psy_look=b->psy+blocktype+(vb->W?2:0);
253 :
254 0 : vb->mode=modenumber;
255 :
256 0 : for(i=0;i<vi->channels;i++){
257 0 : float scale=4.f/n;
258 : float scale_dB;
259 :
260 0 : float *pcm =vb->pcm[i];
261 0 : float *logfft =pcm;
262 :
263 0 : iwork[i]=_vorbis_block_alloc(vb,n/2*sizeof(**iwork));
264 0 : gmdct[i]=_vorbis_block_alloc(vb,n/2*sizeof(**gmdct));
265 :
266 0 : scale_dB=todB(&scale) + .345; /* + .345 is a hack; the original
267 : todB estimation used on IEEE 754
268 : compliant machines had a bug that
269 : returned dB values about a third
270 : of a decibel too high. The bug
271 : was harmless because tunings
272 : implicitly took that into
273 : account. However, fixing the bug
274 : in the estimator requires
275 : changing all the tunings as well.
276 : For now, it's easier to sync
277 : things back up here, and
278 : recalibrate the tunings in the
279 : next major model upgrade. */
280 :
281 : #if 0
282 : if(vi->channels==2){
283 : if(i==0)
284 : _analysis_output("pcmL",seq,pcm,n,0,0,total-n/2);
285 : else
286 : _analysis_output("pcmR",seq,pcm,n,0,0,total-n/2);
287 : }else{
288 : _analysis_output("pcm",seq,pcm,n,0,0,total-n/2);
289 : }
290 : #endif
291 :
292 : /* window the PCM data */
293 0 : _vorbis_apply_window(pcm,b->window,ci->blocksizes,vb->lW,vb->W,vb->nW);
294 :
295 : #if 0
296 : if(vi->channels==2){
297 : if(i==0)
298 : _analysis_output("windowedL",seq,pcm,n,0,0,total-n/2);
299 : else
300 : _analysis_output("windowedR",seq,pcm,n,0,0,total-n/2);
301 : }else{
302 : _analysis_output("windowed",seq,pcm,n,0,0,total-n/2);
303 : }
304 : #endif
305 :
306 : /* transform the PCM data */
307 : /* only MDCT right now.... */
308 0 : mdct_forward(b->transform[vb->W][0],pcm,gmdct[i]);
309 :
310 : /* FFT yields more accurate tonal estimation (not phase sensitive) */
311 0 : drft_forward(&b->fft_look[vb->W],pcm);
312 0 : logfft[0]=scale_dB+todB(pcm) + .345; /* + .345 is a hack; the
313 : original todB estimation used on
314 : IEEE 754 compliant machines had a
315 : bug that returned dB values about
316 : a third of a decibel too high.
317 : The bug was harmless because
318 : tunings implicitly took that into
319 : account. However, fixing the bug
320 : in the estimator requires
321 : changing all the tunings as well.
322 : For now, it's easier to sync
323 : things back up here, and
324 : recalibrate the tunings in the
325 : next major model upgrade. */
326 0 : local_ampmax[i]=logfft[0];
327 0 : for(j=1;j<n-1;j+=2){
328 0 : float temp=pcm[j]*pcm[j]+pcm[j+1]*pcm[j+1];
329 0 : temp=logfft[(j+1)>>1]=scale_dB+.5f*todB(&temp) + .345; /* +
330 : .345 is a hack; the original todB
331 : estimation used on IEEE 754
332 : compliant machines had a bug that
333 : returned dB values about a third
334 : of a decibel too high. The bug
335 : was harmless because tunings
336 : implicitly took that into
337 : account. However, fixing the bug
338 : in the estimator requires
339 : changing all the tunings as well.
340 : For now, it's easier to sync
341 : things back up here, and
342 : recalibrate the tunings in the
343 : next major model upgrade. */
344 0 : if(temp>local_ampmax[i])local_ampmax[i]=temp;
345 : }
346 :
347 0 : if(local_ampmax[i]>0.f)local_ampmax[i]=0.f;
348 0 : if(local_ampmax[i]>global_ampmax)global_ampmax=local_ampmax[i];
349 :
350 : #if 0
351 : if(vi->channels==2){
352 : if(i==0){
353 : _analysis_output("fftL",seq,logfft,n/2,1,0,0);
354 : }else{
355 : _analysis_output("fftR",seq,logfft,n/2,1,0,0);
356 : }
357 : }else{
358 : _analysis_output("fft",seq,logfft,n/2,1,0,0);
359 : }
360 : #endif
361 :
362 : }
363 :
364 : {
365 0 : float *noise = _vorbis_block_alloc(vb,n/2*sizeof(*noise));
366 0 : float *tone = _vorbis_block_alloc(vb,n/2*sizeof(*tone));
367 :
368 0 : for(i=0;i<vi->channels;i++){
369 : /* the encoder setup assumes that all the modes used by any
370 : specific bitrate tweaking use the same floor */
371 :
372 0 : int submap=info->chmuxlist[i];
373 :
374 : /* the following makes things clearer to *me* anyway */
375 0 : float *mdct =gmdct[i];
376 0 : float *logfft =vb->pcm[i];
377 :
378 0 : float *logmdct =logfft+n/2;
379 0 : float *logmask =logfft;
380 :
381 0 : vb->mode=modenumber;
382 :
383 0 : floor_posts[i]=_vorbis_block_alloc(vb,PACKETBLOBS*sizeof(**floor_posts));
384 0 : memset(floor_posts[i],0,sizeof(**floor_posts)*PACKETBLOBS);
385 :
386 0 : for(j=0;j<n/2;j++)
387 0 : logmdct[j]=todB(mdct+j) + .345; /* + .345 is a hack; the original
388 : todB estimation used on IEEE 754
389 : compliant machines had a bug that
390 : returned dB values about a third
391 : of a decibel too high. The bug
392 : was harmless because tunings
393 : implicitly took that into
394 : account. However, fixing the bug
395 : in the estimator requires
396 : changing all the tunings as well.
397 : For now, it's easier to sync
398 : things back up here, and
399 : recalibrate the tunings in the
400 : next major model upgrade. */
401 :
402 : #if 0
403 : if(vi->channels==2){
404 : if(i==0)
405 : _analysis_output("mdctL",seq,logmdct,n/2,1,0,0);
406 : else
407 : _analysis_output("mdctR",seq,logmdct,n/2,1,0,0);
408 : }else{
409 : _analysis_output("mdct",seq,logmdct,n/2,1,0,0);
410 : }
411 : #endif
412 :
413 : /* first step; noise masking. Not only does 'noise masking'
414 : give us curves from which we can decide how much resolution
415 : to give noise parts of the spectrum, it also implicitly hands
416 : us a tonality estimate (the larger the value in the
417 : 'noise_depth' vector, the more tonal that area is) */
418 :
419 0 : _vp_noisemask(psy_look,
420 : logmdct,
421 : noise); /* noise does not have by-frequency offset
422 : bias applied yet */
423 : #if 0
424 : if(vi->channels==2){
425 : if(i==0)
426 : _analysis_output("noiseL",seq,noise,n/2,1,0,0);
427 : else
428 : _analysis_output("noiseR",seq,noise,n/2,1,0,0);
429 : }else{
430 : _analysis_output("noise",seq,noise,n/2,1,0,0);
431 : }
432 : #endif
433 :
434 : /* second step: 'all the other crap'; all the stuff that isn't
435 : computed/fit for bitrate management goes in the second psy
436 : vector. This includes tone masking, peak limiting and ATH */
437 :
438 0 : _vp_tonemask(psy_look,
439 : logfft,
440 : tone,
441 : global_ampmax,
442 0 : local_ampmax[i]);
443 :
444 : #if 0
445 : if(vi->channels==2){
446 : if(i==0)
447 : _analysis_output("toneL",seq,tone,n/2,1,0,0);
448 : else
449 : _analysis_output("toneR",seq,tone,n/2,1,0,0);
450 : }else{
451 : _analysis_output("tone",seq,tone,n/2,1,0,0);
452 : }
453 : #endif
454 :
455 : /* third step; we offset the noise vectors, overlay tone
456 : masking. We then do a floor1-specific line fit. If we're
457 : performing bitrate management, the line fit is performed
458 : multiple times for up/down tweakage on demand. */
459 :
460 : #if 0
461 : {
462 : float aotuv[psy_look->n];
463 : #endif
464 :
465 0 : _vp_offset_and_mix(psy_look,
466 : noise,
467 : tone,
468 : 1,
469 : logmask,
470 : mdct,
471 : logmdct);
472 :
473 : #if 0
474 : if(vi->channels==2){
475 : if(i==0)
476 : _analysis_output("aotuvM1_L",seq,aotuv,psy_look->n,1,1,0);
477 : else
478 : _analysis_output("aotuvM1_R",seq,aotuv,psy_look->n,1,1,0);
479 : }else{
480 : _analysis_output("aotuvM1",seq,aotuv,psy_look->n,1,1,0);
481 : }
482 : }
483 : #endif
484 :
485 :
486 : #if 0
487 : if(vi->channels==2){
488 : if(i==0)
489 : _analysis_output("mask1L",seq,logmask,n/2,1,0,0);
490 : else
491 : _analysis_output("mask1R",seq,logmask,n/2,1,0,0);
492 : }else{
493 : _analysis_output("mask1",seq,logmask,n/2,1,0,0);
494 : }
495 : #endif
496 :
497 : /* this algorithm is hardwired to floor 1 for now; abort out if
498 : we're *not* floor1. This won't happen unless someone has
499 : broken the encode setup lib. Guard it anyway. */
500 0 : if(ci->floor_type[info->floorsubmap[submap]]!=1)return(-1);
501 :
502 0 : floor_posts[i][PACKETBLOBS/2]=
503 0 : floor1_fit(vb,b->flr[info->floorsubmap[submap]],
504 : logmdct,
505 : logmask);
506 :
507 : /* are we managing bitrate? If so, perform two more fits for
508 : later rate tweaking (fits represent hi/lo) */
509 0 : if(vorbis_bitrate_managed(vb) && floor_posts[i][PACKETBLOBS/2]){
510 : /* higher rate by way of lower noise curve */
511 :
512 0 : _vp_offset_and_mix(psy_look,
513 : noise,
514 : tone,
515 : 2,
516 : logmask,
517 : mdct,
518 : logmdct);
519 :
520 : #if 0
521 : if(vi->channels==2){
522 : if(i==0)
523 : _analysis_output("mask2L",seq,logmask,n/2,1,0,0);
524 : else
525 : _analysis_output("mask2R",seq,logmask,n/2,1,0,0);
526 : }else{
527 : _analysis_output("mask2",seq,logmask,n/2,1,0,0);
528 : }
529 : #endif
530 :
531 0 : floor_posts[i][PACKETBLOBS-1]=
532 0 : floor1_fit(vb,b->flr[info->floorsubmap[submap]],
533 : logmdct,
534 : logmask);
535 :
536 : /* lower rate by way of higher noise curve */
537 0 : _vp_offset_and_mix(psy_look,
538 : noise,
539 : tone,
540 : 0,
541 : logmask,
542 : mdct,
543 : logmdct);
544 :
545 : #if 0
546 : if(vi->channels==2){
547 : if(i==0)
548 : _analysis_output("mask0L",seq,logmask,n/2,1,0,0);
549 : else
550 : _analysis_output("mask0R",seq,logmask,n/2,1,0,0);
551 : }else{
552 : _analysis_output("mask0",seq,logmask,n/2,1,0,0);
553 : }
554 : #endif
555 :
556 0 : floor_posts[i][0]=
557 0 : floor1_fit(vb,b->flr[info->floorsubmap[submap]],
558 : logmdct,
559 : logmask);
560 :
561 : /* we also interpolate a range of intermediate curves for
562 : intermediate rates */
563 0 : for(k=1;k<PACKETBLOBS/2;k++)
564 0 : floor_posts[i][k]=
565 0 : floor1_interpolate_fit(vb,b->flr[info->floorsubmap[submap]],
566 0 : floor_posts[i][0],
567 0 : floor_posts[i][PACKETBLOBS/2],
568 0 : k*65536/(PACKETBLOBS/2));
569 0 : for(k=PACKETBLOBS/2+1;k<PACKETBLOBS-1;k++)
570 0 : floor_posts[i][k]=
571 0 : floor1_interpolate_fit(vb,b->flr[info->floorsubmap[submap]],
572 0 : floor_posts[i][PACKETBLOBS/2],
573 0 : floor_posts[i][PACKETBLOBS-1],
574 0 : (k-PACKETBLOBS/2)*65536/(PACKETBLOBS/2));
575 : }
576 : }
577 : }
578 0 : vbi->ampmax=global_ampmax;
579 :
580 : /*
581 : the next phases are performed once for vbr-only and PACKETBLOB
582 : times for bitrate managed modes.
583 :
584 : 1) encode actual mode being used
585 : 2) encode the floor for each channel, compute coded mask curve/res
586 : 3) normalize and couple.
587 : 4) encode residue
588 : 5) save packet bytes to the packetblob vector
589 :
590 : */
591 :
592 : /* iterate over the many masking curve fits we've created */
593 :
594 : {
595 0 : int **couple_bundle=alloca(sizeof(*couple_bundle)*vi->channels);
596 0 : int *zerobundle=alloca(sizeof(*zerobundle)*vi->channels);
597 :
598 0 : for(k=(vorbis_bitrate_managed(vb)?0:PACKETBLOBS/2);
599 0 : k<=(vorbis_bitrate_managed(vb)?PACKETBLOBS-1:PACKETBLOBS/2);
600 0 : k++){
601 0 : oggpack_buffer *opb=vbi->packetblob[k];
602 :
603 : /* start out our new packet blob with packet type and mode */
604 : /* Encode the packet type */
605 0 : oggpack_write(opb,0,1);
606 : /* Encode the modenumber */
607 : /* Encode frame mode, pre,post windowsize, then dispatch */
608 0 : oggpack_write(opb,modenumber,b->modebits);
609 0 : if(vb->W){
610 0 : oggpack_write(opb,vb->lW,1);
611 0 : oggpack_write(opb,vb->nW,1);
612 : }
613 :
614 : /* encode floor, compute masking curve, sep out residue */
615 0 : for(i=0;i<vi->channels;i++){
616 0 : int submap=info->chmuxlist[i];
617 0 : int *ilogmask=iwork[i];
618 :
619 0 : nonzero[i]=floor1_encode(opb,vb,b->flr[info->floorsubmap[submap]],
620 0 : floor_posts[i][k],
621 : ilogmask);
622 : #if 0
623 : {
624 : char buf[80];
625 : sprintf(buf,"maskI%c%d",i?'R':'L',k);
626 : float work[n/2];
627 : for(j=0;j<n/2;j++)
628 : work[j]=FLOOR1_fromdB_LOOKUP[iwork[i][j]];
629 : _analysis_output(buf,seq,work,n/2,1,1,0);
630 : }
631 : #endif
632 : }
633 :
634 : /* our iteration is now based on masking curve, not prequant and
635 : coupling. Only one prequant/coupling step */
636 :
637 : /* quantize/couple */
638 : /* incomplete implementation that assumes the tree is all depth
639 : one, or no tree at all */
640 0 : _vp_couple_quantize_normalize(k,
641 : &ci->psy_g_param,
642 : psy_look,
643 : info,
644 : gmdct,
645 : iwork,
646 : nonzero,
647 0 : ci->psy_g_param.sliding_lowpass[vb->W][k],
648 : vi->channels);
649 :
650 : #if 0
651 : for(i=0;i<vi->channels;i++){
652 : char buf[80];
653 : sprintf(buf,"res%c%d",i?'R':'L',k);
654 : float work[n/2];
655 : for(j=0;j<n/2;j++)
656 : work[j]=iwork[i][j];
657 : _analysis_output(buf,seq,work,n/2,1,0,0);
658 : }
659 : #endif
660 :
661 : /* classify and encode by submap */
662 0 : for(i=0;i<info->submaps;i++){
663 0 : int ch_in_bundle=0;
664 : long **classifications;
665 0 : int resnum=info->residuesubmap[i];
666 :
667 0 : for(j=0;j<vi->channels;j++){
668 0 : if(info->chmuxlist[j]==i){
669 0 : zerobundle[ch_in_bundle]=0;
670 0 : if(nonzero[j])zerobundle[ch_in_bundle]=1;
671 0 : couple_bundle[ch_in_bundle++]=iwork[j];
672 : }
673 : }
674 :
675 0 : classifications=_residue_P[ci->residue_type[resnum]]->
676 0 : class(vb,b->residue[resnum],couple_bundle,zerobundle,ch_in_bundle);
677 :
678 0 : ch_in_bundle=0;
679 0 : for(j=0;j<vi->channels;j++)
680 0 : if(info->chmuxlist[j]==i)
681 0 : couple_bundle[ch_in_bundle++]=iwork[j];
682 :
683 0 : _residue_P[ci->residue_type[resnum]]->
684 0 : forward(opb,vb,b->residue[resnum],
685 : couple_bundle,zerobundle,ch_in_bundle,classifications,i);
686 : }
687 :
688 : /* ok, done encoding. Next protopacket. */
689 : }
690 :
691 : }
692 :
693 : #if 0
694 : seq++;
695 : total+=ci->blocksizes[vb->W]/4+ci->blocksizes[vb->nW]/4;
696 : #endif
697 0 : return(0);
698 : }
699 :
700 0 : static int mapping0_inverse(vorbis_block *vb,vorbis_info_mapping *l){
701 0 : vorbis_dsp_state *vd=vb->vd;
702 0 : vorbis_info *vi=vd->vi;
703 0 : codec_setup_info *ci=vi->codec_setup;
704 0 : private_state *b=vd->backend_state;
705 0 : vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)l;
706 :
707 : int i,j;
708 0 : long n=vb->pcmend=ci->blocksizes[vb->W];
709 :
710 0 : float **pcmbundle=alloca(sizeof(*pcmbundle)*vi->channels);
711 0 : int *zerobundle=alloca(sizeof(*zerobundle)*vi->channels);
712 :
713 0 : int *nonzero =alloca(sizeof(*nonzero)*vi->channels);
714 0 : void **floormemo=alloca(sizeof(*floormemo)*vi->channels);
715 :
716 : /* recover the spectral envelope; store it in the PCM vector for now */
717 0 : for(i=0;i<vi->channels;i++){
718 0 : int submap=info->chmuxlist[i];
719 0 : floormemo[i]=_floor_P[ci->floor_type[info->floorsubmap[submap]]]->
720 0 : inverse1(vb,b->flr[info->floorsubmap[submap]]);
721 0 : if(floormemo[i])
722 0 : nonzero[i]=1;
723 : else
724 0 : nonzero[i]=0;
725 0 : memset(vb->pcm[i],0,sizeof(*vb->pcm[i])*n/2);
726 : }
727 :
728 : /* channel coupling can 'dirty' the nonzero listing */
729 0 : for(i=0;i<info->coupling_steps;i++){
730 0 : if(nonzero[info->coupling_mag[i]] ||
731 0 : nonzero[info->coupling_ang[i]]){
732 0 : nonzero[info->coupling_mag[i]]=1;
733 0 : nonzero[info->coupling_ang[i]]=1;
734 : }
735 : }
736 :
737 : /* recover the residue into our working vectors */
738 0 : for(i=0;i<info->submaps;i++){
739 0 : int ch_in_bundle=0;
740 0 : for(j=0;j<vi->channels;j++){
741 0 : if(info->chmuxlist[j]==i){
742 0 : if(nonzero[j])
743 0 : zerobundle[ch_in_bundle]=1;
744 : else
745 0 : zerobundle[ch_in_bundle]=0;
746 0 : pcmbundle[ch_in_bundle++]=vb->pcm[j];
747 : }
748 : }
749 :
750 0 : _residue_P[ci->residue_type[info->residuesubmap[i]]]->
751 0 : inverse(vb,b->residue[info->residuesubmap[i]],
752 : pcmbundle,zerobundle,ch_in_bundle);
753 : }
754 :
755 : /* channel coupling */
756 0 : for(i=info->coupling_steps-1;i>=0;i--){
757 0 : float *pcmM=vb->pcm[info->coupling_mag[i]];
758 0 : float *pcmA=vb->pcm[info->coupling_ang[i]];
759 :
760 0 : for(j=0;j<n/2;j++){
761 0 : float mag=pcmM[j];
762 0 : float ang=pcmA[j];
763 :
764 0 : if(mag>0)
765 0 : if(ang>0){
766 0 : pcmM[j]=mag;
767 0 : pcmA[j]=mag-ang;
768 : }else{
769 0 : pcmA[j]=mag;
770 0 : pcmM[j]=mag+ang;
771 : }
772 : else
773 0 : if(ang>0){
774 0 : pcmM[j]=mag;
775 0 : pcmA[j]=mag+ang;
776 : }else{
777 0 : pcmA[j]=mag;
778 0 : pcmM[j]=mag-ang;
779 : }
780 : }
781 : }
782 :
783 : /* compute and apply spectral envelope */
784 0 : for(i=0;i<vi->channels;i++){
785 0 : float *pcm=vb->pcm[i];
786 0 : int submap=info->chmuxlist[i];
787 0 : _floor_P[ci->floor_type[info->floorsubmap[submap]]]->
788 0 : inverse2(vb,b->flr[info->floorsubmap[submap]],
789 0 : floormemo[i],pcm);
790 : }
791 :
792 : /* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
793 : /* only MDCT right now.... */
794 0 : for(i=0;i<vi->channels;i++){
795 0 : float *pcm=vb->pcm[i];
796 0 : mdct_backward(b->transform[vb->W][0],pcm,pcm);
797 : }
798 :
799 : /* all done! */
800 0 : return(0);
801 : }
802 :
803 : /* export hooks */
804 : const vorbis_func_mapping mapping0_exportbundle={
805 : &mapping0_pack,
806 : &mapping0_unpack,
807 : &mapping0_free_info,
808 : &mapping0_forward,
809 : &mapping0_inverse
810 : };
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