aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/aacenc.h
blob: 8ffc94f99ba8b8773da48e2098782c76ed77e99a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
/*
 * AAC encoder
 * Copyright (C) 2008 Konstantin Shishkov
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_AACENC_H
#define AVCODEC_AACENC_H

#include "libavutil/float_dsp.h"
#include "libavutil/mem_internal.h"

#include "avcodec.h"
#include "put_bits.h"

#include "aac.h"
#include "audio_frame_queue.h"
#include "psymodel.h"

#include "lpc.h"

typedef enum AACCoder {
    AAC_CODER_ANMR = 0,
    AAC_CODER_TWOLOOP,
    AAC_CODER_FAST,

    AAC_CODER_NB,
}AACCoder;

typedef struct AACEncOptions {
    int coder;
    int pns;
    int tns;
    int ltp;
    int pce;
    int pred;
    int mid_side;
    int intensity_stereo;
} AACEncOptions;

struct AACEncContext;

typedef struct AACCoefficientsEncoder {
    void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
                                  SingleChannelElement *sce, const float lambda);
    void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
                                     int win, int group_len, const float lambda);
    void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, float *out, int size,
                                     int scale_idx, int cb, const float lambda, int rtz);
    void (*encode_tns_info)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*encode_ltp_info)(struct AACEncContext *s, SingleChannelElement *sce, int common_window);
    void (*encode_main_pred)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*adjust_common_pred)(struct AACEncContext *s, ChannelElement *cpe);
    void (*adjust_common_ltp)(struct AACEncContext *s, ChannelElement *cpe);
    void (*apply_main_pred)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*apply_tns_filt)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*update_ltp)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*ltp_insert_new_frame)(struct AACEncContext *s);
    void (*set_special_band_scalefactors)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*search_for_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);
    void (*mark_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);
    void (*search_for_tns)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*search_for_ltp)(struct AACEncContext *s, SingleChannelElement *sce, int common_window);
    void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe);
    void (*search_for_is)(struct AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe);
    void (*search_for_pred)(struct AACEncContext *s, SingleChannelElement *sce);
} AACCoefficientsEncoder;

extern const AACCoefficientsEncoder ff_aac_coders[];

typedef struct AACQuantizeBandCostCacheEntry {
    float rd;
    float energy;
    int bits;
    char cb;
    char rtz;
    uint16_t generation;
} AACQuantizeBandCostCacheEntry;

typedef struct AACPCEInfo {
    int64_t layout;
    int num_ele[4];                              ///< front, side, back, lfe
    int pairing[3][8];                           ///< front, side, back
    int index[4][8];                             ///< front, side, back, lfe
    uint8_t config_map[16];                      ///< configs the encoder's channel specific settings
    uint8_t reorder_map[16];                     ///< maps channels from lavc to aac order
} AACPCEInfo;

/**
 * List of PCE (Program Configuration Element) for the channel layouts listed
 * in channel_layout.h
 *
 * For those wishing in the future to add other layouts:
 *
 * - num_ele: number of elements in each group of front, side, back, lfe channels
 *            (an element is of type SCE (single channel), CPE (channel pair) for
 *            the first 3 groups; and is LFE for LFE group).
 *
 * - pairing: 0 for an SCE element or 1 for a CPE; does not apply to LFE group
 *
 * - index: there are three independent indices for SCE, CPE and LFE;
 *     they are incremented irrespective of the group to which the element belongs;
 *     they are not reset when going from one group to another
 *
 *     Example: for 7.0 channel layout,
 *        .pairing = { { 1, 0 }, { 1 }, { 1 }, }, (3 CPE and 1 SCE in front group)
 *        .index = { { 0, 0 }, { 1 }, { 2 }, },
 *               (index is 0 for the single SCE but goes from 0 to 2 for the CPEs)
 *
 *     The index order impacts the channel ordering. But is otherwise arbitrary
 *     (the sequence could have been 2, 0, 1 instead of 0, 1, 2).
 *
 *     Spec allows for discontinuous indices, e.g. if one has a total of two SCE,
 *     SCE.0 SCE.15 is OK per spec; BUT it won't be decoded by our AAC decoder
 *     which at this time requires that indices fully cover some range starting
 *     from 0 (SCE.1 SCE.0 is OK but not SCE.0 SCE.15).
 *
 * - config_map: total number of elements and their types. Beware, the way the
 *               types are ordered impacts the final channel ordering.
 *
 * - reorder_map: reorders the channels.
 *
 */
static const AACPCEInfo aac_pce_configs[] = {
    {
        .layout = AV_CH_LAYOUT_MONO,
        .num_ele = { 1, 0, 0, 0 },
        .pairing = { { 0 }, },
        .index = { { 0 }, },
        .config_map = { 1, TYPE_SCE, },
        .reorder_map = { 0 },
    },
    {
        .layout = AV_CH_LAYOUT_STEREO,
        .num_ele = { 1, 0, 0, 0 },
        .pairing = { { 1 }, },
        .index = { { 0 }, },
        .config_map = { 1, TYPE_CPE, },
        .reorder_map = { 0, 1 },
    },
    {
        .layout = AV_CH_LAYOUT_2POINT1,
        .num_ele = { 1, 0, 0, 1 },
        .pairing = { { 1 }, },
        .index = { { 0 },{ 0 },{ 0 },{ 0 } },
        .config_map = { 2, TYPE_CPE, TYPE_LFE },
        .reorder_map = { 0, 1, 2 },
    },
    {
        .layout = AV_CH_LAYOUT_2_1,
        .num_ele = { 1, 0, 1, 0 },
        .pairing = { { 1 },{ 0 },{ 0 } },
        .index = { { 0 },{ 0 },{ 0 }, },
        .config_map = { 2, TYPE_CPE, TYPE_SCE },
        .reorder_map = { 0, 1, 2 },
    },
    {
        .layout = AV_CH_LAYOUT_SURROUND,
        .num_ele = { 2, 0, 0, 0 },
        .pairing = { { 1, 0 }, },
        .index = { { 0, 0 }, },
        .config_map = { 2, TYPE_CPE, TYPE_SCE, },
        .reorder_map = { 0, 1, 2 },
    },
    {
        .layout = AV_CH_LAYOUT_3POINT1,
        .num_ele = { 2, 0, 0, 1 },
        .pairing = { { 1, 0 }, },
        .index = { { 0, 0 }, { 0 }, { 0 }, { 0 }, },
        .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_LFE },
        .reorder_map = { 0, 1, 2, 3 },
    },
    {
        .layout = AV_CH_LAYOUT_4POINT0,
        .num_ele = { 2, 0, 1, 0 },
        .pairing = { { 1, 0 }, { 0 }, { 0 }, },
        .index = { { 0, 0 }, { 0 }, { 1 } },
        .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_SCE },
        .reorder_map = {  0, 1, 2, 3 },
    },
    {
        .layout = AV_CH_LAYOUT_4POINT1,
        .num_ele = { 2, 1, 1, 0 },
        .pairing = { { 1, 0 }, { 0 }, { 0 }, },
        .index = { { 0, 0 }, { 1 }, { 2 }, { 0 } },
        .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_SCE },
        .reorder_map = { 0, 1, 2, 3, 4 },
    },
    {
        .layout = AV_CH_LAYOUT_2_2,
        .num_ele = { 1, 1, 0, 0 },
        .pairing = { { 1 }, { 1 }, },
        .index = { { 0 }, { 1 }, },
        .config_map = { 2, TYPE_CPE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3 },
    },
    {
        .layout = AV_CH_LAYOUT_QUAD,
        .num_ele = { 1, 0, 1, 0 },
        .pairing = { { 1 }, { 0 }, { 1 }, },
        .index = { { 0 }, { 0 }, { 1 } },
        .config_map = { 2, TYPE_CPE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3 },
    },
    {
        .layout = AV_CH_LAYOUT_5POINT0,
        .num_ele = { 2, 1, 0, 0 },
        .pairing = { { 1, 0 }, { 1 }, },
        .index = { { 0, 0 }, { 1 } },
        .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3, 4 },
    },
    {
        .layout = AV_CH_LAYOUT_5POINT1,
        .num_ele = { 2, 1, 1, 0 },
        .pairing = { { 1, 0 }, { 0 }, { 1 }, },
        .index = { { 0, 0 }, { 1 }, { 1 } },
        .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3, 4, 5 },
    },
    {
        .layout = AV_CH_LAYOUT_5POINT0_BACK,
        .num_ele = { 2, 0, 1, 0 },
        .pairing = { { 1, 0 }, { 0 }, { 1 } },
        .index = { { 0, 0 }, { 0 }, { 1 } },
        .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3, 4 },
    },
    {
        .layout = AV_CH_LAYOUT_5POINT1_BACK,
        .num_ele = { 2, 1, 1, 0 },
        .pairing = { { 1, 0 }, { 0 }, { 1 }, },
        .index = { { 0, 0 }, { 1 }, { 1 } },
        .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3, 4, 5 },
    },
    {
        .layout = AV_CH_LAYOUT_6POINT0,
        .num_ele = { 2, 1, 1, 0 },
        .pairing = { { 1, 0 }, { 1 }, { 0 }, },
        .index = { { 0, 0 }, { 1 }, { 1 } },
        .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
        .reorder_map = { 0, 1, 2, 3, 4, 5 },
    },
    {
        .layout = AV_CH_LAYOUT_6POINT0_FRONT,
        .num_ele = { 2, 1, 0, 0 },
        .pairing = { { 1, 1 }, { 1 } },
        .index = { { 1, 0 }, { 2 }, },
        .config_map = { 3, TYPE_CPE, TYPE_CPE, TYPE_CPE, },
        .reorder_map = { 0, 1, 2, 3, 4, 5 },
    },
    {
        .layout = AV_CH_LAYOUT_HEXAGONAL,
        .num_ele = { 2, 0, 2, 0 },
        .pairing = { { 1, 0 },{ 0 },{ 1, 0 }, },
        .index = { { 0, 0 },{ 0 },{ 1, 1 } },
        .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, },
        .reorder_map = { 0, 1, 2, 3, 4, 5 },
    },
    {
        .layout = AV_CH_LAYOUT_6POINT1,
        .num_ele = { 2, 1, 2, 0 },
        .pairing = { { 1, 0 },{ 0 },{ 1, 0 }, },
        .index = { { 0, 0 },{ 1 },{ 1, 2 } },
        .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
    },
    {
        .layout = AV_CH_LAYOUT_6POINT1_BACK,
        .num_ele = { 2, 1, 2, 0 },
        .pairing = { { 1, 0 }, { 0 }, { 1, 0 }, },
        .index = { { 0, 0 }, { 1 }, { 1, 2 } },
        .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
    },
    {
        .layout = AV_CH_LAYOUT_6POINT1_FRONT,
        .num_ele = { 2, 1, 2, 0 },
        .pairing = { { 1, 0 }, { 0 }, { 1, 0 }, },
        .index = { { 0, 0 }, { 1 }, { 1, 2 } },
        .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
    },
    {
        .layout = AV_CH_LAYOUT_7POINT0,
        .num_ele = { 2, 1, 1, 0 },
        .pairing = { { 1, 0 }, { 1 }, { 1 }, },
        .index = { { 0, 0 }, { 1 }, { 2 }, },
        .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
    },
    {
        .layout = AV_CH_LAYOUT_7POINT0_FRONT,
        .num_ele = { 2, 1, 1, 0 },
        .pairing = { { 1, 0 }, { 1 }, { 1 }, },
        .index = { { 0, 0 }, { 1 }, { 2 }, },
        .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
    },
    {
        .layout = AV_CH_LAYOUT_7POINT1,
        .num_ele = { 2, 1, 2, 0 },
        .pairing = { { 1, 0 }, { 0 }, { 1, 1 }, },
        .index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
        .config_map = { 5, TYPE_CPE, TYPE_SCE,  TYPE_SCE, TYPE_CPE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
    },
    {
        .layout = AV_CH_LAYOUT_7POINT1_WIDE,
        .num_ele = { 2, 1, 2, 0 },
        .pairing = { { 1, 0 }, { 0 },{  1, 1 }, },
        .index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
        .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
    },
    {
        .layout = AV_CH_LAYOUT_7POINT1_WIDE_BACK,
        .num_ele = { 2, 1, 2, 0 },
        .pairing = { { 1, 0 }, { 0 }, { 1, 1 }, },
        .index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
        .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
    },
    {
        .layout = AV_CH_LAYOUT_OCTAGONAL,
        .num_ele = { 2, 1, 2, 0 },
        .pairing = { { 1, 0 }, { 1 }, { 1, 0 }, },
        .index = { { 0, 0 }, { 1 }, { 2, 1 } },
        .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_SCE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
    },
    {   /* Meant for order 2/mixed ambisonics */
        .layout = AV_CH_LAYOUT_OCTAGONAL | AV_CH_TOP_CENTER,
        .num_ele = { 2, 2, 2, 0 },
        .pairing = { { 1, 0 }, { 1, 0 }, { 1, 0 }, },
        .index = { { 0, 0 }, { 1, 1 }, { 2, 2 } },
        .config_map = { 6, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8 },
    },
    {   /* Meant for order 2/mixed ambisonics */
        .layout = AV_CH_LAYOUT_6POINT0_FRONT | AV_CH_BACK_CENTER |
                  AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_TOP_CENTER,
        .num_ele = { 2, 2, 2, 0 },
        .pairing = { { 1, 1 }, { 1, 0 }, { 1, 0 }, },
        .index = { { 0, 1 }, { 2, 0 }, { 3, 1 } },
        .config_map = { 6, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
    },
    {
        .layout = AV_CH_LAYOUT_HEXADECAGONAL,
        .num_ele = { 4, 2, 4, 0 },
        .pairing = { { 1, 0, 1, 0 }, { 1, 1 }, { 1, 0, 1, 0 }, },
        .index = { { 0, 0, 1, 1 }, { 2, 3 }, { 4, 2, 5, 3 } },
        .config_map = { 10, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
        .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
    },
};

/**
 * AAC encoder context
 */
typedef struct AACEncContext {
    AVClass *av_class;
    AACEncOptions options;                       ///< encoding options
    PutBitContext pb;
    FFTContext mdct1024;                         ///< long (1024 samples) frame transform context
    FFTContext mdct128;                          ///< short (128 samples) frame transform context
    AVFloatDSPContext *fdsp;
    AACPCEInfo pce;                              ///< PCE data, if needed
    float *planar_samples[16];                   ///< saved preprocessed input

    int profile;                                 ///< copied from avctx
    int needs_pce;                               ///< flag for non-standard layout
    LPCContext lpc;                              ///< used by TNS
    int samplerate_index;                        ///< MPEG-4 samplerate index
    int channels;                                ///< channel count
    const uint8_t *reorder_map;                  ///< lavc to aac reorder map
    const uint8_t *chan_map;                     ///< channel configuration map

    ChannelElement *cpe;                         ///< channel elements
    FFPsyContext psy;
    struct FFPsyPreprocessContext* psypp;
    const AACCoefficientsEncoder *coder;
    int cur_channel;                             ///< current channel for coder context
    int random_state;
    float lambda;
    int last_frame_pb_count;                     ///< number of bits for the previous frame
    float lambda_sum;                            ///< sum(lambda), for Qvg reporting
    int lambda_count;                            ///< count(lambda), for Qvg reporting
    enum RawDataBlockType cur_type;              ///< channel group type cur_channel belongs to

    AudioFrameQueue afq;
    DECLARE_ALIGNED(16, int,   qcoefs)[96];      ///< quantized coefficients
    DECLARE_ALIGNED(32, float, scoefs)[1024];    ///< scaled coefficients

    uint16_t quantize_band_cost_cache_generation;
    AACQuantizeBandCostCacheEntry quantize_band_cost_cache[256][128]; ///< memoization area for quantize_band_cost

    void (*abs_pow34)(float *out, const float *in, const int size);
    void (*quant_bands)(int *out, const float *in, const float *scaled,
                        int size, int is_signed, int maxval, const float Q34,
                        const float rounding);

    struct {
        float *samples;
    } buffer;
} AACEncContext;

void ff_aac_dsp_init_x86(AACEncContext *s);
void ff_aac_coder_init_mips(AACEncContext *c);
void ff_quantize_band_cost_cache_init(struct AACEncContext *s);


#endif /* AVCODEC_AACENC_H */