Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/dcaenc.c |
Date: | 2022-07-07 01:21:54 |
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Lines: | 518 | 601 | 86.2% |
Branches: | 308 | 388 | 79.4% |
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1 | /* | ||
2 | * DCA encoder | ||
3 | * Copyright (C) 2008-2012 Alexander E. Patrakov | ||
4 | * 2010 Benjamin Larsson | ||
5 | * 2011 Xiang Wang | ||
6 | * | ||
7 | * This file is part of FFmpeg. | ||
8 | * | ||
9 | * FFmpeg is free software; you can redistribute it and/or | ||
10 | * modify it under the terms of the GNU Lesser General Public | ||
11 | * License as published by the Free Software Foundation; either | ||
12 | * version 2.1 of the License, or (at your option) any later version. | ||
13 | * | ||
14 | * FFmpeg is distributed in the hope that it will be useful, | ||
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
17 | * Lesser General Public License for more details. | ||
18 | * | ||
19 | * You should have received a copy of the GNU Lesser General Public | ||
20 | * License along with FFmpeg; if not, write to the Free Software | ||
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
22 | */ | ||
23 | |||
24 | #define FFT_FLOAT 0 | ||
25 | |||
26 | #include "libavutil/avassert.h" | ||
27 | #include "libavutil/channel_layout.h" | ||
28 | #include "libavutil/common.h" | ||
29 | #include "libavutil/ffmath.h" | ||
30 | #include "libavutil/mem_internal.h" | ||
31 | #include "libavutil/opt.h" | ||
32 | #include "avcodec.h" | ||
33 | #include "codec_internal.h" | ||
34 | #include "dca.h" | ||
35 | #include "dcaadpcm.h" | ||
36 | #include "dcamath.h" | ||
37 | #include "dca_core.h" | ||
38 | #include "dcadata.h" | ||
39 | #include "dcaenc.h" | ||
40 | #include "encode.h" | ||
41 | #include "fft.h" | ||
42 | #include "internal.h" | ||
43 | #include "mathops.h" | ||
44 | #include "put_bits.h" | ||
45 | |||
46 | #define MAX_CHANNELS 6 | ||
47 | #define DCA_MAX_FRAME_SIZE 16384 | ||
48 | #define DCA_HEADER_SIZE 13 | ||
49 | #define DCA_LFE_SAMPLES 8 | ||
50 | |||
51 | #define DCAENC_SUBBANDS 32 | ||
52 | #define SUBFRAMES 1 | ||
53 | #define SUBSUBFRAMES 2 | ||
54 | #define SUBBAND_SAMPLES (SUBFRAMES * SUBSUBFRAMES * 8) | ||
55 | #define AUBANDS 25 | ||
56 | |||
57 | #define COS_T(x) (c->cos_table[(x) & 2047]) | ||
58 | |||
59 | typedef struct CompressionOptions { | ||
60 | int adpcm_mode; | ||
61 | } CompressionOptions; | ||
62 | |||
63 | typedef struct DCAEncContext { | ||
64 | AVClass *class; | ||
65 | PutBitContext pb; | ||
66 | DCAADPCMEncContext adpcm_ctx; | ||
67 | FFTContext mdct; | ||
68 | CompressionOptions options; | ||
69 | int frame_size; | ||
70 | int frame_bits; | ||
71 | int fullband_channels; | ||
72 | int channels; | ||
73 | int lfe_channel; | ||
74 | int samplerate_index; | ||
75 | int bitrate_index; | ||
76 | int channel_config; | ||
77 | const int32_t *band_interpolation; | ||
78 | const int32_t *band_spectrum; | ||
79 | int lfe_scale_factor; | ||
80 | softfloat lfe_quant; | ||
81 | int32_t lfe_peak_cb; | ||
82 | const int8_t *channel_order_tab; ///< channel reordering table, lfe and non lfe | ||
83 | |||
84 | int32_t prediction_mode[MAX_CHANNELS][DCAENC_SUBBANDS]; | ||
85 | int32_t adpcm_history[MAX_CHANNELS][DCAENC_SUBBANDS][DCA_ADPCM_COEFFS * 2]; | ||
86 | int32_t history[MAX_CHANNELS][512]; /* This is a circular buffer */ | ||
87 | int32_t *subband[MAX_CHANNELS][DCAENC_SUBBANDS]; | ||
88 | int32_t quantized[MAX_CHANNELS][DCAENC_SUBBANDS][SUBBAND_SAMPLES]; | ||
89 | int32_t peak_cb[MAX_CHANNELS][DCAENC_SUBBANDS]; | ||
90 | int32_t diff_peak_cb[MAX_CHANNELS][DCAENC_SUBBANDS]; ///< expected peak of residual signal | ||
91 | int32_t downsampled_lfe[DCA_LFE_SAMPLES]; | ||
92 | int32_t masking_curve_cb[SUBSUBFRAMES][256]; | ||
93 | int32_t bit_allocation_sel[MAX_CHANNELS]; | ||
94 | int abits[MAX_CHANNELS][DCAENC_SUBBANDS]; | ||
95 | int scale_factor[MAX_CHANNELS][DCAENC_SUBBANDS]; | ||
96 | softfloat quant[MAX_CHANNELS][DCAENC_SUBBANDS]; | ||
97 | int32_t quant_index_sel[MAX_CHANNELS][DCA_CODE_BOOKS]; | ||
98 | int32_t eff_masking_curve_cb[256]; | ||
99 | int32_t band_masking_cb[32]; | ||
100 | int32_t worst_quantization_noise; | ||
101 | int32_t worst_noise_ever; | ||
102 | int consumed_bits; | ||
103 | int consumed_adpcm_bits; ///< Number of bits to transmit ADPCM related info | ||
104 | |||
105 | int32_t cos_table[2048]; | ||
106 | int32_t band_interpolation_tab[2][512]; | ||
107 | int32_t band_spectrum_tab[2][8]; | ||
108 | int32_t auf[9][AUBANDS][256]; | ||
109 | int32_t cb_to_add[256]; | ||
110 | int32_t cb_to_level[2048]; | ||
111 | int32_t lfe_fir_64i[512]; | ||
112 | } DCAEncContext; | ||
113 | |||
114 | /* Transfer function of outer and middle ear, Hz -> dB */ | ||
115 | 115200 | static double hom(double f) | |
116 | { | ||
117 | 115200 | double f1 = f / 1000; | |
118 | |||
119 | 115200 | return -3.64 * pow(f1, -0.8) | |
120 | 115200 | + 6.8 * exp(-0.6 * (f1 - 3.4) * (f1 - 3.4)) | |
121 | 115200 | - 6.0 * exp(-0.15 * (f1 - 8.7) * (f1 - 8.7)) | |
122 | 115200 | - 0.0006 * (f1 * f1) * (f1 * f1); | |
123 | } | ||
124 | |||
125 | 115200 | static double gammafilter(int i, double f) | |
126 | { | ||
127 | 115200 | double h = (f - fc[i]) / erb[i]; | |
128 | |||
129 | 115200 | h = 1 + h * h; | |
130 | 115200 | h = 1 / (h * h); | |
131 | 115200 | return 20 * log10(h); | |
132 | } | ||
133 | |||
134 | 2 | static int subband_bufer_alloc(DCAEncContext *c) | |
135 | { | ||
136 | int ch, band; | ||
137 | 2 | int32_t *bufer = av_calloc(MAX_CHANNELS * DCAENC_SUBBANDS * | |
138 | (SUBBAND_SAMPLES + DCA_ADPCM_COEFFS), | ||
139 | sizeof(int32_t)); | ||
140 |
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2 | if (!bufer) |
141 | ✗ | return AVERROR(ENOMEM); | |
142 | |||
143 | /* we need a place for DCA_ADPCM_COEFF samples from previous frame | ||
144 | * to calc prediction coefficients for each subband */ | ||
145 |
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14 | for (ch = 0; ch < MAX_CHANNELS; ch++) { |
146 |
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396 | for (band = 0; band < DCAENC_SUBBANDS; band++) { |
147 | 384 | c->subband[ch][band] = bufer + | |
148 | 384 | ch * DCAENC_SUBBANDS * (SUBBAND_SAMPLES + DCA_ADPCM_COEFFS) + | |
149 | 384 | band * (SUBBAND_SAMPLES + DCA_ADPCM_COEFFS) + DCA_ADPCM_COEFFS; | |
150 | } | ||
151 | } | ||
152 | 2 | return 0; | |
153 | } | ||
154 | |||
155 | 2 | static void subband_bufer_free(DCAEncContext *c) | |
156 | { | ||
157 |
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2 | if (c->subband[0][0]) { |
158 | 2 | int32_t *bufer = c->subband[0][0] - DCA_ADPCM_COEFFS; | |
159 | 2 | av_free(bufer); | |
160 | 2 | c->subband[0][0] = NULL; | |
161 | } | ||
162 | 2 | } | |
163 | |||
164 | 2 | static int encode_init(AVCodecContext *avctx) | |
165 | { | ||
166 | 2 | DCAEncContext *c = avctx->priv_data; | |
167 | 2 | AVChannelLayout layout = avctx->ch_layout; | |
168 | int i, j, k, min_frame_bits; | ||
169 | int ret; | ||
170 | |||
171 |
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2 | if ((ret = subband_bufer_alloc(c)) < 0) |
172 | ✗ | return ret; | |
173 | |||
174 | 2 | c->fullband_channels = c->channels = layout.nb_channels; | |
175 |
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2 | c->lfe_channel = (c->channels == 3 || c->channels == 6); |
176 | 2 | c->band_interpolation = c->band_interpolation_tab[1]; | |
177 | 2 | c->band_spectrum = c->band_spectrum_tab[1]; | |
178 | 2 | c->worst_quantization_noise = -2047; | |
179 | 2 | c->worst_noise_ever = -2047; | |
180 | 2 | c->consumed_adpcm_bits = 0; | |
181 | |||
182 |
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2 | if (ff_dcaadpcm_init(&c->adpcm_ctx)) |
183 | ✗ | return AVERROR(ENOMEM); | |
184 | |||
185 |
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2 | if (layout.order == AV_CHANNEL_ORDER_UNSPEC) { |
186 | ✗ | av_log(avctx, AV_LOG_WARNING, "No channel layout specified. The " | |
187 | "encoder will guess the layout, but it " | ||
188 | "might be incorrect.\n"); | ||
189 | ✗ | av_channel_layout_default(&layout, layout.nb_channels); | |
190 | } | ||
191 | |||
192 |
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2 | if (!av_channel_layout_compare(&layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO)) |
193 | ✗ | c->channel_config = 0; | |
194 |
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2 | else if (!av_channel_layout_compare(&layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) |
195 | 2 | c->channel_config = 2; | |
196 | ✗ | else if (!av_channel_layout_compare(&layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_2_2)) | |
197 | ✗ | c->channel_config = 8; | |
198 | ✗ | else if (!av_channel_layout_compare(&layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT0)) | |
199 | ✗ | c->channel_config = 9; | |
200 | ✗ | else if (!av_channel_layout_compare(&layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1)) | |
201 | ✗ | c->channel_config = 9; | |
202 | else { | ||
203 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unsupported channel layout!\n"); | |
204 | ✗ | return AVERROR_PATCHWELCOME; | |
205 | } | ||
206 | |||
207 |
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2 | if (c->lfe_channel) { |
208 | ✗ | c->fullband_channels--; | |
209 | ✗ | c->channel_order_tab = channel_reorder_lfe[c->channel_config]; | |
210 | } else { | ||
211 | 2 | c->channel_order_tab = channel_reorder_nolfe[c->channel_config]; | |
212 | } | ||
213 | |||
214 |
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14 | for (i = 0; i < MAX_CHANNELS; i++) { |
215 |
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132 | for (j = 0; j < DCA_CODE_BOOKS; j++) { |
216 | 120 | c->quant_index_sel[i][j] = ff_dca_quant_index_group_size[j]; | |
217 | } | ||
218 | /* 6 - no Huffman */ | ||
219 | 12 | c->bit_allocation_sel[i] = 6; | |
220 | |||
221 |
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396 | for (j = 0; j < DCAENC_SUBBANDS; j++) { |
222 | /* -1 - no ADPCM */ | ||
223 | 384 | c->prediction_mode[i][j] = -1; | |
224 | 384 | memset(c->adpcm_history[i][j], 0, sizeof(int32_t)*DCA_ADPCM_COEFFS); | |
225 | } | ||
226 | } | ||
227 | |||
228 |
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12 | for (i = 0; i < 9; i++) { |
229 |
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12 | if (sample_rates[i] == avctx->sample_rate) |
230 | 2 | break; | |
231 | } | ||
232 |
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2 | if (i == 9) |
233 | ✗ | return AVERROR(EINVAL); | |
234 | 2 | c->samplerate_index = i; | |
235 | |||
236 |
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2 | if (avctx->bit_rate < 32000 || avctx->bit_rate > 3840000) { |
237 | ✗ | av_log(avctx, AV_LOG_ERROR, "Bit rate %"PRId64" not supported.", avctx->bit_rate); | |
238 | ✗ | return AVERROR(EINVAL); | |
239 | } | ||
240 |
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46 | for (i = 0; ff_dca_bit_rates[i] < avctx->bit_rate; i++) |
241 | ; | ||
242 | 2 | c->bitrate_index = i; | |
243 | 2 | c->frame_bits = FFALIGN((avctx->bit_rate * 512 + avctx->sample_rate - 1) / avctx->sample_rate, 32); | |
244 | 2 | min_frame_bits = 132 + (493 + 28 * 32) * c->fullband_channels + c->lfe_channel * 72; | |
245 |
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2 | if (c->frame_bits < min_frame_bits || c->frame_bits > (DCA_MAX_FRAME_SIZE << 3)) |
246 | ✗ | return AVERROR(EINVAL); | |
247 | |||
248 | 2 | c->frame_size = (c->frame_bits + 7) / 8; | |
249 | |||
250 | 2 | avctx->frame_size = 32 * SUBBAND_SAMPLES; | |
251 | |||
252 |
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2 | if ((ret = ff_mdct_init(&c->mdct, 9, 0, 1.0)) < 0) |
253 | ✗ | return ret; | |
254 | |||
255 | /* Init all tables */ | ||
256 | 2 | c->cos_table[0] = 0x7fffffff; | |
257 | 2 | c->cos_table[512] = 0; | |
258 | 2 | c->cos_table[1024] = -c->cos_table[0]; | |
259 |
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1024 | for (i = 1; i < 512; i++) { |
260 | 1022 | c->cos_table[i] = (int32_t)(0x7fffffff * cos(M_PI * i / 1024)); | |
261 | 1022 | c->cos_table[1024-i] = -c->cos_table[i]; | |
262 | 1022 | c->cos_table[1024+i] = -c->cos_table[i]; | |
263 | 1022 | c->cos_table[2048-i] = +c->cos_table[i]; | |
264 | } | ||
265 | |||
266 |
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4098 | for (i = 0; i < 2048; i++) |
267 | 4096 | c->cb_to_level[i] = (int32_t)(0x7fffffff * ff_exp10(-0.005 * i)); | |
268 | |||
269 |
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66 | for (k = 0; k < 32; k++) { |
270 |
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576 | for (j = 0; j < 8; j++) { |
271 | 512 | c->lfe_fir_64i[64 * j + k] = (int32_t)(0xffffff800000ULL * ff_dca_lfe_fir_64[8 * k + j]); | |
272 | 512 | c->lfe_fir_64i[64 * (7-j) + (63 - k)] = (int32_t)(0xffffff800000ULL * ff_dca_lfe_fir_64[8 * k + j]); | |
273 | } | ||
274 | } | ||
275 | |||
276 |
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1026 | for (i = 0; i < 512; i++) { |
277 | 1024 | c->band_interpolation_tab[0][i] = (int32_t)(0x1000000000ULL * ff_dca_fir_32bands_perfect[i]); | |
278 | 1024 | c->band_interpolation_tab[1][i] = (int32_t)(0x1000000000ULL * ff_dca_fir_32bands_nonperfect[i]); | |
279 | } | ||
280 | |||
281 |
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20 | for (i = 0; i < 9; i++) { |
282 |
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468 | for (j = 0; j < AUBANDS; j++) { |
283 |
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115650 | for (k = 0; k < 256; k++) { |
284 | 115200 | double freq = sample_rates[i] * (k + 0.5) / 512; | |
285 | |||
286 | 115200 | c->auf[i][j][k] = (int32_t)(10 * (hom(freq) + gammafilter(j, freq))); | |
287 | } | ||
288 | } | ||
289 | } | ||
290 | |||
291 |
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514 | for (i = 0; i < 256; i++) { |
292 | 512 | double add = 1 + ff_exp10(-0.01 * i); | |
293 | 512 | c->cb_to_add[i] = (int32_t)(100 * log10(add)); | |
294 | } | ||
295 |
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18 | for (j = 0; j < 8; j++) { |
296 | 16 | double accum = 0; | |
297 |
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8208 | for (i = 0; i < 512; i++) { |
298 |
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8192 | double reconst = ff_dca_fir_32bands_perfect[i] * ((i & 64) ? (-1) : 1); |
299 | 8192 | accum += reconst * cos(2 * M_PI * (i + 0.5 - 256) * (j + 0.5) / 512); | |
300 | } | ||
301 | 16 | c->band_spectrum_tab[0][j] = (int32_t)(200 * log10(accum)); | |
302 | } | ||
303 |
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18 | for (j = 0; j < 8; j++) { |
304 | 16 | double accum = 0; | |
305 |
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8208 | for (i = 0; i < 512; i++) { |
306 |
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8192 | double reconst = ff_dca_fir_32bands_nonperfect[i] * ((i & 64) ? (-1) : 1); |
307 | 8192 | accum += reconst * cos(2 * M_PI * (i + 0.5 - 256) * (j + 0.5) / 512); | |
308 | } | ||
309 | 16 | c->band_spectrum_tab[1][j] = (int32_t)(200 * log10(accum)); | |
310 | } | ||
311 | |||
312 | 2 | return 0; | |
313 | } | ||
314 | |||
315 | 2 | static av_cold int encode_close(AVCodecContext *avctx) | |
316 | { | ||
317 | 2 | DCAEncContext *c = avctx->priv_data; | |
318 | 2 | ff_mdct_end(&c->mdct); | |
319 | 2 | subband_bufer_free(c); | |
320 | 2 | ff_dcaadpcm_free(&c->adpcm_ctx); | |
321 | |||
322 | 2 | return 0; | |
323 | } | ||
324 | |||
325 | 1034 | static void subband_transform(DCAEncContext *c, const int32_t *input) | |
326 | { | ||
327 | int ch, subs, i, k, j; | ||
328 | |||
329 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) { |
330 | /* History is copied because it is also needed for PSY */ | ||
331 | int32_t hist[512]; | ||
332 | 2068 | int hist_start = 0; | |
333 | 2068 | const int chi = c->channel_order_tab[ch]; | |
334 | |||
335 | 2068 | memcpy(hist, &c->history[ch][0], 512 * sizeof(int32_t)); | |
336 | |||
337 |
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35156 | for (subs = 0; subs < SUBBAND_SAMPLES; subs++) { |
338 | int32_t accum[64]; | ||
339 | int32_t resp; | ||
340 | int band; | ||
341 | |||
342 | /* Calculate the convolutions at once */ | ||
343 | 33088 | memset(accum, 0, 64 * sizeof(int32_t)); | |
344 | |||
345 | 33088 | for (k = 0, i = hist_start, j = 0; | |
346 |
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9033024 | i < 512; k = (k + 1) & 63, i++, j++) |
347 | 8999936 | accum[k] += mul32(hist[i], c->band_interpolation[j]); | |
348 |
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7974208 | for (i = 0; i < hist_start; k = (k + 1) & 63, i++, j++) |
349 | 7941120 | accum[k] += mul32(hist[i], c->band_interpolation[j]); | |
350 | |||
351 |
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562496 | for (k = 16; k < 32; k++) |
352 | 529408 | accum[k] = accum[k] - accum[31 - k]; | |
353 |
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562496 | for (k = 32; k < 48; k++) |
354 | 529408 | accum[k] = accum[k] + accum[95 - k]; | |
355 | |||
356 |
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1091904 | for (band = 0; band < 32; band++) { |
357 | 1058816 | resp = 0; | |
358 |
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34940928 | for (i = 16; i < 48; i++) { |
359 | 33882112 | int s = (2 * band + 1) * (2 * (i + 16) + 1); | |
360 | 33882112 | resp += mul32(accum[i], COS_T(s << 3)) >> 3; | |
361 | } | ||
362 | |||
363 |
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1058816 | c->subband[ch][band][subs] = ((band + 1) & 2) ? -resp : resp; |
364 | } | ||
365 | |||
366 | /* Copy in 32 new samples from input */ | ||
367 |
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1091904 | for (i = 0; i < 32; i++) |
368 | 1058816 | hist[i + hist_start] = input[(subs * 32 + i) * c->channels + chi]; | |
369 | |||
370 | 33088 | hist_start = (hist_start + 32) & 511; | |
371 | } | ||
372 | } | ||
373 | 1034 | } | |
374 | |||
375 | ✗ | static void lfe_downsample(DCAEncContext *c, const int32_t *input) | |
376 | { | ||
377 | /* FIXME: make 128x LFE downsampling possible */ | ||
378 | ✗ | const int lfech = lfe_index[c->channel_config]; | |
379 | int i, j, lfes; | ||
380 | int32_t hist[512]; | ||
381 | int32_t accum; | ||
382 | ✗ | int hist_start = 0; | |
383 | |||
384 | ✗ | memcpy(hist, &c->history[c->channels - 1][0], 512 * sizeof(int32_t)); | |
385 | |||
386 | ✗ | for (lfes = 0; lfes < DCA_LFE_SAMPLES; lfes++) { | |
387 | /* Calculate the convolution */ | ||
388 | ✗ | accum = 0; | |
389 | |||
390 | ✗ | for (i = hist_start, j = 0; i < 512; i++, j++) | |
391 | ✗ | accum += mul32(hist[i], c->lfe_fir_64i[j]); | |
392 | ✗ | for (i = 0; i < hist_start; i++, j++) | |
393 | ✗ | accum += mul32(hist[i], c->lfe_fir_64i[j]); | |
394 | |||
395 | ✗ | c->downsampled_lfe[lfes] = accum; | |
396 | |||
397 | /* Copy in 64 new samples from input */ | ||
398 | ✗ | for (i = 0; i < 64; i++) | |
399 | ✗ | hist[i + hist_start] = input[(lfes * 64 + i) * c->channels + lfech]; | |
400 | |||
401 | ✗ | hist_start = (hist_start + 64) & 511; | |
402 | } | ||
403 | } | ||
404 | |||
405 | 1124992 | static int32_t get_cb(DCAEncContext *c, int32_t in) | |
406 | { | ||
407 | 1124992 | int i, res = 0; | |
408 | 1124992 | in = FFABS(in); | |
409 | |||
410 |
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13499904 | for (i = 1024; i > 0; i >>= 1) { |
411 |
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12374912 | if (c->cb_to_level[i + res] >= in) |
412 | 6580690 | res += i; | |
413 | } | ||
414 | 1124992 | return -res; | |
415 | } | ||
416 | |||
417 | 55058432 | static int32_t add_cb(DCAEncContext *c, int32_t a, int32_t b) | |
418 | { | ||
419 |
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55058432 | if (a < b) |
420 | 13348074 | FFSWAP(int32_t, a, b); | |
421 | |||
422 |
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55058432 | if (a - b >= 256) |
423 | 31966962 | return a; | |
424 | 23091470 | return a + c->cb_to_add[a - b]; | |
425 | } | ||
426 | |||
427 | 4136 | static void calc_power(DCAEncContext *c, | |
428 | const int32_t in[2 * 256], int32_t power[256]) | ||
429 | { | ||
430 | int i; | ||
431 | 4136 | LOCAL_ALIGNED_32(int32_t, data, [512]); | |
432 | 4136 | LOCAL_ALIGNED_32(int32_t, coeff, [256]); | |
433 | |||
434 |
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2121768 | for (i = 0; i < 512; i++) |
435 | 2117632 | data[i] = norm__(mul32(in[i], 0x3fffffff - (COS_T(4 * i + 2) >> 1)), 4); | |
436 | |||
437 | 4136 | c->mdct.mdct_calc(&c->mdct, coeff, data); | |
438 |
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1062952 | for (i = 0; i < 256; i++) { |
439 | 1058816 | const int32_t cb = get_cb(c, coeff[i]); | |
440 | 1058816 | power[i] = add_cb(c, cb, cb); | |
441 | } | ||
442 | 4136 | } | |
443 | |||
444 | 4136 | static void adjust_jnd(DCAEncContext *c, | |
445 | const int32_t in[512], int32_t out_cb[256]) | ||
446 | { | ||
447 | int32_t power[256]; | ||
448 | int32_t out_cb_unnorm[256]; | ||
449 | int32_t denom; | ||
450 | 4136 | const int32_t ca_cb = -1114; | |
451 | 4136 | const int32_t cs_cb = 928; | |
452 | 4136 | const int samplerate_index = c->samplerate_index; | |
453 | int i, j; | ||
454 | |||
455 | 4136 | calc_power(c, in, power); | |
456 | |||
457 |
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1062952 | for (j = 0; j < 256; j++) |
458 | 1058816 | out_cb_unnorm[j] = -2047; /* and can only grow */ | |
459 | |||
460 |
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107536 | for (i = 0; i < AUBANDS; i++) { |
461 | 103400 | denom = ca_cb; /* and can only grow */ | |
462 |
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26573800 | for (j = 0; j < 256; j++) |
463 | 26470400 | denom = add_cb(c, denom, power[j] + c->auf[samplerate_index][i][j]); | |
464 |
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26573800 | for (j = 0; j < 256; j++) |
465 | 26470400 | out_cb_unnorm[j] = add_cb(c, out_cb_unnorm[j], | |
466 | 26470400 | -denom + c->auf[samplerate_index][i][j]); | |
467 | } | ||
468 | |||
469 |
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1062952 | for (j = 0; j < 256; j++) |
470 | 1058816 | out_cb[j] = add_cb(c, out_cb[j], -out_cb_unnorm[j] - ca_cb - cs_cb); | |
471 | 4136 | } | |
472 | |||
473 | typedef void (*walk_band_t)(DCAEncContext *c, int band1, int band2, int f, | ||
474 | int32_t spectrum1, int32_t spectrum2, int channel, | ||
475 | int32_t * arg); | ||
476 | |||
477 | 33088 | static void walk_band_low(DCAEncContext *c, int band, int channel, | |
478 | walk_band_t walk, int32_t *arg) | ||
479 | { | ||
480 | int f; | ||
481 | |||
482 |
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33088 | if (band == 0) { |
483 |
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5170 | for (f = 0; f < 4; f++) |
484 | 4136 | walk(c, 0, 0, f, 0, -2047, channel, arg); | |
485 | } else { | ||
486 |
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288486 | for (f = 0; f < 8; f++) |
487 | 256432 | walk(c, band, band - 1, 8 * band - 4 + f, | |
488 | 256432 | c->band_spectrum[7 - f], c->band_spectrum[f], channel, arg); | |
489 | } | ||
490 | 33088 | } | |
491 | |||
492 | 33088 | static void walk_band_high(DCAEncContext *c, int band, int channel, | |
493 | walk_band_t walk, int32_t *arg) | ||
494 | { | ||
495 | int f; | ||
496 | |||
497 |
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33088 | if (band == 31) { |
498 |
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5170 | for (f = 0; f < 4; f++) |
499 | 4136 | walk(c, 31, 31, 256 - 4 + f, 0, -2047, channel, arg); | |
500 | } else { | ||
501 |
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288486 | for (f = 0; f < 8; f++) |
502 | 256432 | walk(c, band, band + 1, 8 * band + 4 + f, | |
503 | 256432 | c->band_spectrum[f], c->band_spectrum[7 - f], channel, arg); | |
504 | } | ||
505 | 33088 | } | |
506 | |||
507 | 521136 | static void update_band_masking(DCAEncContext *c, int band1, int band2, | |
508 | int f, int32_t spectrum1, int32_t spectrum2, | ||
509 | int channel, int32_t * arg) | ||
510 | { | ||
511 | 521136 | int32_t value = c->eff_masking_curve_cb[f] - spectrum1; | |
512 | |||
513 |
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521136 | if (value < c->band_masking_cb[band1]) |
514 | 211342 | c->band_masking_cb[band1] = value; | |
515 | 521136 | } | |
516 | |||
517 | 1034 | static void calc_masking(DCAEncContext *c, const int32_t *input) | |
518 | { | ||
519 | int i, k, band, ch, ssf; | ||
520 | int32_t data[512]; | ||
521 | |||
522 |
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265738 | for (i = 0; i < 256; i++) |
523 |
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794112 | for (ssf = 0; ssf < SUBSUBFRAMES; ssf++) |
524 | 529408 | c->masking_curve_cb[ssf][i] = -2047; | |
525 | |||
526 |
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3102 | for (ssf = 0; ssf < SUBSUBFRAMES; ssf++) |
527 |
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6204 | for (ch = 0; ch < c->fullband_channels; ch++) { |
528 | 4136 | const int chi = c->channel_order_tab[ch]; | |
529 | |||
530 |
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1062952 | for (i = 0, k = 128 + 256 * ssf; k < 512; i++, k++) |
531 | 1058816 | data[i] = c->history[ch][k]; | |
532 |
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1062952 | for (k -= 512; i < 512; i++, k++) |
533 | 1058816 | data[i] = input[k * c->channels + chi]; | |
534 | 4136 | adjust_jnd(c, data, c->masking_curve_cb[ssf]); | |
535 | } | ||
536 |
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265738 | for (i = 0; i < 256; i++) { |
537 | 264704 | int32_t m = 2048; | |
538 | |||
539 |
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794112 | for (ssf = 0; ssf < SUBSUBFRAMES; ssf++) |
540 |
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529408 | if (c->masking_curve_cb[ssf][i] < m) |
541 | 386776 | m = c->masking_curve_cb[ssf][i]; | |
542 | 264704 | c->eff_masking_curve_cb[i] = m; | |
543 | } | ||
544 | |||
545 |
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34122 | for (band = 0; band < 32; band++) { |
546 | 33088 | c->band_masking_cb[band] = 2048; | |
547 | 33088 | walk_band_low(c, band, 0, update_band_masking, NULL); | |
548 | 33088 | walk_band_high(c, band, 0, update_band_masking, NULL); | |
549 | } | ||
550 | 1034 | } | |
551 | |||
552 | 66176 | static inline int32_t find_peak(DCAEncContext *c, const int32_t *in, int len) | |
553 | { | ||
554 | int sample; | ||
555 | 66176 | int32_t m = 0; | |
556 |
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1124992 | for (sample = 0; sample < len; sample++) { |
557 | 1058816 | int32_t s = abs(in[sample]); | |
558 |
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1058816 | if (m < s) |
559 | 228656 | m = s; | |
560 | } | ||
561 | 66176 | return get_cb(c, m); | |
562 | } | ||
563 | |||
564 | 1034 | static void find_peaks(DCAEncContext *c) | |
565 | { | ||
566 | int band, ch; | ||
567 | |||
568 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) { |
569 |
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68244 | for (band = 0; band < 32; band++) |
570 | 66176 | c->peak_cb[ch][band] = find_peak(c, c->subband[ch][band], | |
571 | SUBBAND_SAMPLES); | ||
572 | } | ||
573 | |||
574 |
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1034 | if (c->lfe_channel) |
575 | ✗ | c->lfe_peak_cb = find_peak(c, c->downsampled_lfe, DCA_LFE_SAMPLES); | |
576 | 1034 | } | |
577 | |||
578 | ✗ | static void adpcm_analysis(DCAEncContext *c) | |
579 | { | ||
580 | int ch, band; | ||
581 | int pred_vq_id; | ||
582 | int32_t *samples; | ||
583 | int32_t estimated_diff[SUBBAND_SAMPLES]; | ||
584 | |||
585 | ✗ | c->consumed_adpcm_bits = 0; | |
586 | ✗ | for (ch = 0; ch < c->fullband_channels; ch++) { | |
587 | ✗ | for (band = 0; band < 32; band++) { | |
588 | ✗ | samples = c->subband[ch][band] - DCA_ADPCM_COEFFS; | |
589 | ✗ | pred_vq_id = ff_dcaadpcm_subband_analysis(&c->adpcm_ctx, samples, | |
590 | SUBBAND_SAMPLES, estimated_diff); | ||
591 | ✗ | if (pred_vq_id >= 0) { | |
592 | ✗ | c->prediction_mode[ch][band] = pred_vq_id; | |
593 | ✗ | c->consumed_adpcm_bits += 12; //12 bits to transmit prediction vq index | |
594 | ✗ | c->diff_peak_cb[ch][band] = find_peak(c, estimated_diff, 16); | |
595 | } else { | ||
596 | ✗ | c->prediction_mode[ch][band] = -1; | |
597 | } | ||
598 | } | ||
599 | } | ||
600 | } | ||
601 | |||
602 | static const int snr_fudge = 128; | ||
603 | #define USED_1ABITS 1 | ||
604 | #define USED_26ABITS 4 | ||
605 | |||
606 | 66176 | static inline int32_t get_step_size(DCAEncContext *c, int ch, int band) | |
607 | { | ||
608 | int32_t step_size; | ||
609 | |||
610 |
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66176 | if (c->bitrate_index == 3) |
611 | ✗ | step_size = ff_dca_lossless_quant[c->abits[ch][band]]; | |
612 | else | ||
613 | 66176 | step_size = ff_dca_lossy_quant[c->abits[ch][band]]; | |
614 | |||
615 | 66176 | return step_size; | |
616 | } | ||
617 | |||
618 | 666752 | static int calc_one_scale(DCAEncContext *c, int32_t peak_cb, int abits, | |
619 | softfloat *quant) | ||
620 | { | ||
621 | int32_t peak; | ||
622 | int our_nscale, try_remove; | ||
623 | softfloat our_quant; | ||
624 | |||
625 |
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666752 | av_assert0(peak_cb <= 0); |
626 |
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666752 | av_assert0(peak_cb >= -2047); |
627 | |||
628 | 666752 | our_nscale = 127; | |
629 | 666752 | peak = c->cb_to_level[-peak_cb]; | |
630 | |||
631 |
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5334016 | for (try_remove = 64; try_remove > 0; try_remove >>= 1) { |
632 |
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4667264 | if (scalefactor_inv[our_nscale - try_remove].e + stepsize_inv[abits].e <= 17) |
633 | 1414480 | continue; | |
634 | 3252784 | our_quant.m = mul32(scalefactor_inv[our_nscale - try_remove].m, stepsize_inv[abits].m); | |
635 | 3252784 | our_quant.e = scalefactor_inv[our_nscale - try_remove].e + stepsize_inv[abits].e - 17; | |
636 |
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3252784 | if ((ff_dca_quant_levels[abits] - 1) / 2 < quantize_value(peak, our_quant)) |
637 | 755786 | continue; | |
638 | 2496998 | our_nscale -= try_remove; | |
639 | } | ||
640 | |||
641 |
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666752 | if (our_nscale >= 125) |
642 | ✗ | our_nscale = 124; | |
643 | |||
644 | 666752 | quant->m = mul32(scalefactor_inv[our_nscale].m, stepsize_inv[abits].m); | |
645 | 666752 | quant->e = scalefactor_inv[our_nscale].e + stepsize_inv[abits].e - 17; | |
646 |
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666752 | av_assert0((ff_dca_quant_levels[abits] - 1) / 2 >= quantize_value(peak, *quant)); |
647 | |||
648 | 666752 | return our_nscale; | |
649 | } | ||
650 | |||
651 | ✗ | static inline void quantize_adpcm_subband(DCAEncContext *c, int ch, int band) | |
652 | { | ||
653 | int32_t step_size; | ||
654 | ✗ | int32_t diff_peak_cb = c->diff_peak_cb[ch][band]; | |
655 | ✗ | c->scale_factor[ch][band] = calc_one_scale(c, diff_peak_cb, | |
656 | c->abits[ch][band], | ||
657 | &c->quant[ch][band]); | ||
658 | |||
659 | ✗ | step_size = get_step_size(c, ch, band); | |
660 | ✗ | ff_dcaadpcm_do_real(c->prediction_mode[ch][band], | |
661 | c->quant[ch][band], | ||
662 | ✗ | ff_dca_scale_factor_quant7[c->scale_factor[ch][band]], | |
663 | ✗ | step_size, c->adpcm_history[ch][band], c->subband[ch][band], | |
664 | ✗ | c->adpcm_history[ch][band] + 4, c->quantized[ch][band], | |
665 | ✗ | SUBBAND_SAMPLES, c->cb_to_level[-diff_peak_cb]); | |
666 | } | ||
667 | |||
668 | 10418 | static void quantize_adpcm(DCAEncContext *c) | |
669 | { | ||
670 | int band, ch; | ||
671 | |||
672 |
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31254 | for (ch = 0; ch < c->fullband_channels; ch++) |
673 |
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687588 | for (band = 0; band < 32; band++) |
674 |
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666752 | if (c->prediction_mode[ch][band] >= 0) |
675 | ✗ | quantize_adpcm_subband(c, ch, band); | |
676 | 10418 | } | |
677 | |||
678 | 10418 | static void quantize_pcm(DCAEncContext *c) | |
679 | { | ||
680 | int sample, band, ch; | ||
681 | |||
682 |
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31254 | for (ch = 0; ch < c->fullband_channels; ch++) { |
683 |
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687588 | for (band = 0; band < 32; band++) { |
684 |
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666752 | if (c->prediction_mode[ch][band] == -1) { |
685 |
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11334784 | for (sample = 0; sample < SUBBAND_SAMPLES; sample++) { |
686 | 10668032 | int32_t val = quantize_value(c->subband[ch][band][sample], | |
687 | c->quant[ch][band]); | ||
688 | 10668032 | c->quantized[ch][band][sample] = val; | |
689 | } | ||
690 | } | ||
691 | } | ||
692 | } | ||
693 | 10418 | } | |
694 | |||
695 | 102450 | static void accumulate_huff_bit_consumption(int abits, int32_t *quantized, | |
696 | uint32_t *result) | ||
697 | { | ||
698 | 102450 | uint8_t sel, id = abits - 1; | |
699 |
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477400 | for (sel = 0; sel < ff_dca_quant_index_group_size[id]; sel++) |
700 | 374950 | result[sel] += ff_dca_vlc_calc_quant_bits(quantized, SUBBAND_SAMPLES, | |
701 | sel, id); | ||
702 | 102450 | } | |
703 | |||
704 | 20836 | static uint32_t set_best_code(uint32_t vlc_bits[DCA_CODE_BOOKS][7], | |
705 | uint32_t clc_bits[DCA_CODE_BOOKS], | ||
706 | int32_t res[DCA_CODE_BOOKS]) | ||
707 | { | ||
708 | uint8_t i, sel; | ||
709 | uint32_t best_sel_bits[DCA_CODE_BOOKS]; | ||
710 | int32_t best_sel_id[DCA_CODE_BOOKS]; | ||
711 | 20836 | uint32_t t, bits = 0; | |
712 | |||
713 |
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229196 | for (i = 0; i < DCA_CODE_BOOKS; i++) { |
714 | |||
715 |
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208360 | av_assert0(!((!!vlc_bits[i][0]) ^ (!!clc_bits[i]))); |
716 |
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208360 | if (vlc_bits[i][0] == 0) { |
717 | /* do not transmit adjustment index for empty codebooks */ | ||
718 | 130000 | res[i] = ff_dca_quant_index_group_size[i]; | |
719 | /* and skip it */ | ||
720 | 130000 | continue; | |
721 | } | ||
722 | |||
723 | 78360 | best_sel_bits[i] = vlc_bits[i][0]; | |
724 | 78360 | best_sel_id[i] = 0; | |
725 |
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427676 | for (sel = 0; sel < ff_dca_quant_index_group_size[i]; sel++) { |
726 |
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|
349316 | if (best_sel_bits[i] > vlc_bits[i][sel] && vlc_bits[i][sel]) { |
727 | 89308 | best_sel_bits[i] = vlc_bits[i][sel]; | |
728 | 89308 | best_sel_id[i] = sel; | |
729 | } | ||
730 | } | ||
731 | |||
732 | /* 2 bits to transmit scale factor adjustment index */ | ||
733 | 78360 | t = best_sel_bits[i] + 2; | |
734 |
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78360 | if (t < clc_bits[i]) { |
735 | 56868 | res[i] = best_sel_id[i]; | |
736 | 56868 | bits += t; | |
737 | } else { | ||
738 | 21492 | res[i] = ff_dca_quant_index_group_size[i]; | |
739 | 21492 | bits += clc_bits[i]; | |
740 | } | ||
741 | } | ||
742 | 20836 | return bits; | |
743 | } | ||
744 | |||
745 | 20836 | static uint32_t set_best_abits_code(int abits[DCAENC_SUBBANDS], int bands, | |
746 | int32_t *res) | ||
747 | { | ||
748 | uint8_t i; | ||
749 | uint32_t t; | ||
750 | 20836 | int32_t best_sel = 6; | |
751 | 20836 | int32_t best_bits = bands * 5; | |
752 | |||
753 | /* Check do we have subband which cannot be encoded by Huffman tables */ | ||
754 |
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20836 | for (i = 0; i < bands; i++) { |
755 |
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20836 | if (abits[i] > 12 || abits[i] == 0) { |
756 | 20836 | *res = best_sel; | |
757 | 20836 | return best_bits; | |
758 | } | ||
759 | } | ||
760 | |||
761 | ✗ | for (i = 0; i < DCA_BITALLOC_12_COUNT; i++) { | |
762 | ✗ | t = ff_dca_vlc_calc_alloc_bits(abits, bands, i); | |
763 | ✗ | if (t < best_bits) { | |
764 | ✗ | best_bits = t; | |
765 | ✗ | best_sel = i; | |
766 | } | ||
767 | } | ||
768 | |||
769 | ✗ | *res = best_sel; | |
770 | ✗ | return best_bits; | |
771 | } | ||
772 | |||
773 | 10418 | static int init_quantization_noise(DCAEncContext *c, int noise, int forbid_zero) | |
774 | { | ||
775 | 10418 | int ch, band, ret = USED_26ABITS | USED_1ABITS; | |
776 | uint32_t huff_bit_count_accum[MAX_CHANNELS][DCA_CODE_BOOKS][7]; | ||
777 | uint32_t clc_bit_count_accum[MAX_CHANNELS][DCA_CODE_BOOKS]; | ||
778 | 10418 | uint32_t bits_counter = 0; | |
779 | |||
780 | 10418 | c->consumed_bits = 132 + 333 * c->fullband_channels; | |
781 | 10418 | c->consumed_bits += c->consumed_adpcm_bits; | |
782 |
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|
10418 | if (c->lfe_channel) |
783 | ✗ | c->consumed_bits += 72; | |
784 | |||
785 | /* attempt to guess the bit distribution based on the prevoius frame */ | ||
786 |
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31254 | for (ch = 0; ch < c->fullband_channels; ch++) { |
787 |
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|
687588 | for (band = 0; band < 32; band++) { |
788 | 666752 | int snr_cb = c->peak_cb[ch][band] - c->band_masking_cb[band] - noise; | |
789 | |||
790 |
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|
666752 | if (snr_cb >= 1312) { |
791 | 58244 | c->abits[ch][band] = 26; | |
792 | 58244 | ret &= ~USED_1ABITS; | |
793 |
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|
608508 | } else if (snr_cb >= 222) { |
794 | 528984 | c->abits[ch][band] = 8 + mul32(snr_cb - 222, 69000000); | |
795 | 528984 | ret &= ~(USED_26ABITS | USED_1ABITS); | |
796 |
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|
79524 | } else if (snr_cb >= 0) { |
797 | 34916 | c->abits[ch][band] = 2 + mul32(snr_cb, 106000000); | |
798 | 34916 | ret &= ~(USED_26ABITS | USED_1ABITS); | |
799 |
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44608 | } else if (forbid_zero || snr_cb >= -140) { |
800 | 44608 | c->abits[ch][band] = 1; | |
801 | 44608 | ret &= ~USED_26ABITS; | |
802 | } else { | ||
803 | ✗ | c->abits[ch][band] = 0; | |
804 | ✗ | ret &= ~(USED_26ABITS | USED_1ABITS); | |
805 | } | ||
806 | } | ||
807 | 20836 | c->consumed_bits += set_best_abits_code(c->abits[ch], 32, | |
808 | &c->bit_allocation_sel[ch]); | ||
809 | } | ||
810 | |||
811 | /* Recalc scale_factor each time to get bits consumption in case of Huffman coding. | ||
812 | It is suboptimal solution */ | ||
813 | /* TODO: May be cache scaled values */ | ||
814 |
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|
31254 | for (ch = 0; ch < c->fullband_channels; ch++) { |
815 |
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|
687588 | for (band = 0; band < 32; band++) { |
816 |
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|
666752 | if (c->prediction_mode[ch][band] == -1) { |
817 | 666752 | c->scale_factor[ch][band] = calc_one_scale(c, c->peak_cb[ch][band], | |
818 | c->abits[ch][band], | ||
819 | &c->quant[ch][band]); | ||
820 | } | ||
821 | } | ||
822 | } | ||
823 | 10418 | quantize_adpcm(c); | |
824 | 10418 | quantize_pcm(c); | |
825 | |||
826 | 10418 | memset(huff_bit_count_accum, 0, MAX_CHANNELS * DCA_CODE_BOOKS * 7 * sizeof(uint32_t)); | |
827 | 10418 | memset(clc_bit_count_accum, 0, MAX_CHANNELS * DCA_CODE_BOOKS * sizeof(uint32_t)); | |
828 |
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31254 | for (ch = 0; ch < c->fullband_channels; ch++) { |
829 |
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687588 | for (band = 0; band < 32; band++) { |
830 |
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|
666752 | if (c->abits[ch][band] && c->abits[ch][band] <= DCA_CODE_BOOKS) { |
831 | 102450 | accumulate_huff_bit_consumption(c->abits[ch][band], | |
832 | 102450 | c->quantized[ch][band], | |
833 | 102450 | huff_bit_count_accum[ch][c->abits[ch][band] - 1]); | |
834 | 102450 | clc_bit_count_accum[ch][c->abits[ch][band] - 1] += bit_consumption[c->abits[ch][band]]; | |
835 | } else { | ||
836 | 564302 | bits_counter += bit_consumption[c->abits[ch][band]]; | |
837 | } | ||
838 | } | ||
839 | } | ||
840 | |||
841 |
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|
31254 | for (ch = 0; ch < c->fullband_channels; ch++) { |
842 | 20836 | bits_counter += set_best_code(huff_bit_count_accum[ch], | |
843 | 20836 | clc_bit_count_accum[ch], | |
844 | 20836 | c->quant_index_sel[ch]); | |
845 | } | ||
846 | |||
847 | 10418 | c->consumed_bits += bits_counter; | |
848 | |||
849 | 10418 | return ret; | |
850 | } | ||
851 | |||
852 | 1034 | static void assign_bits(DCAEncContext *c) | |
853 | { | ||
854 | /* Find the bounds where the binary search should work */ | ||
855 | int low, high, down; | ||
856 | 1034 | int used_abits = 0; | |
857 | 1034 | int forbid_zero = 1; | |
858 | 1034 | restart: | |
859 | 1034 | init_quantization_noise(c, c->worst_quantization_noise, forbid_zero); | |
860 | 1034 | low = high = c->worst_quantization_noise; | |
861 |
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|
1034 | if (c->consumed_bits > c->frame_bits) { |
862 |
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1118 | while (c->consumed_bits > c->frame_bits) { |
863 |
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|
580 | if (used_abits == USED_1ABITS && forbid_zero) { |
864 | ✗ | forbid_zero = 0; | |
865 | ✗ | goto restart; | |
866 | } | ||
867 | 580 | low = high; | |
868 | 580 | high += snr_fudge; | |
869 | 580 | used_abits = init_quantization_noise(c, high, forbid_zero); | |
870 | } | ||
871 | } else { | ||
872 |
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|
1028 | while (c->consumed_bits <= c->frame_bits) { |
873 | 532 | high = low; | |
874 |
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|
532 | if (used_abits == USED_26ABITS) |
875 | ✗ | goto out; /* The requested bitrate is too high, pad with zeros */ | |
876 | 532 | low -= snr_fudge; | |
877 | 532 | used_abits = init_quantization_noise(c, low, forbid_zero); | |
878 | } | ||
879 | } | ||
880 | |||
881 | /* Now do a binary search between low and high to see what fits */ | ||
882 |
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8272 | for (down = snr_fudge >> 1; down; down >>= 1) { |
883 | 7238 | init_quantization_noise(c, high - down, forbid_zero); | |
884 |
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|
7238 | if (c->consumed_bits <= c->frame_bits) |
885 | 3724 | high -= down; | |
886 | } | ||
887 | 1034 | init_quantization_noise(c, high, forbid_zero); | |
888 | 1034 | out: | |
889 | 1034 | c->worst_quantization_noise = high; | |
890 |
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|
1034 | if (high > c->worst_noise_ever) |
891 | 2 | c->worst_noise_ever = high; | |
892 | 1034 | } | |
893 | |||
894 | 1034 | static void shift_history(DCAEncContext *c, const int32_t *input) | |
895 | { | ||
896 | int k, ch; | ||
897 | |||
898 |
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530442 | for (k = 0; k < 512; k++) |
899 |
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|
1588224 | for (ch = 0; ch < c->channels; ch++) { |
900 | 1058816 | const int chi = c->channel_order_tab[ch]; | |
901 | |||
902 | 1058816 | c->history[ch][k] = input[k * c->channels + chi]; | |
903 | } | ||
904 | 1034 | } | |
905 | |||
906 | 1034 | static void fill_in_adpcm_bufer(DCAEncContext *c) | |
907 | { | ||
908 | int ch, band; | ||
909 | int32_t step_size; | ||
910 | /* We fill in ADPCM work buffer for subbands which hasn't been ADPCM coded | ||
911 | * in current frame - we need this data if subband of next frame is | ||
912 | * ADPCM | ||
913 | */ | ||
914 |
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3102 | for (ch = 0; ch < c->channels; ch++) { |
915 |
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68244 | for (band = 0; band < 32; band++) { |
916 | 66176 | int32_t *samples = c->subband[ch][band] - DCA_ADPCM_COEFFS; | |
917 |
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|
66176 | if (c->prediction_mode[ch][band] == -1) { |
918 | 66176 | step_size = get_step_size(c, ch, band); | |
919 | |||
920 | 66176 | ff_dca_core_dequantize(c->adpcm_history[ch][band], | |
921 | 66176 | c->quantized[ch][band]+12, step_size, | |
922 | 66176 | ff_dca_scale_factor_quant7[c->scale_factor[ch][band]], 0, 4); | |
923 | } else { | ||
924 | ✗ | AV_COPY128U(c->adpcm_history[ch][band], c->adpcm_history[ch][band]+4); | |
925 | } | ||
926 | /* Copy dequantized values for LPC analysis. | ||
927 | * It reduces artifacts in case of extreme quantization, | ||
928 | * example: in current frame abits is 1 and has no prediction flag, | ||
929 | * but end of this frame is sine like signal. In this case, if LPC analysis uses | ||
930 | * original values, likely LPC analysis returns good prediction gain, and sets prediction flag. | ||
931 | * But there are no proper value in decoder history, so likely result will be no good. | ||
932 | * Bitstream has "Predictor history flag switch", but this flag disables history for all subbands | ||
933 | */ | ||
934 | 66176 | samples[0] = c->adpcm_history[ch][band][0] * (1 << 7); | |
935 | 66176 | samples[1] = c->adpcm_history[ch][band][1] * (1 << 7); | |
936 | 66176 | samples[2] = c->adpcm_history[ch][band][2] * (1 << 7); | |
937 | 66176 | samples[3] = c->adpcm_history[ch][band][3] * (1 << 7); | |
938 | } | ||
939 | } | ||
940 | 1034 | } | |
941 | |||
942 | 1034 | static void calc_lfe_scales(DCAEncContext *c) | |
943 | { | ||
944 |
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1034 | if (c->lfe_channel) |
945 | ✗ | c->lfe_scale_factor = calc_one_scale(c, c->lfe_peak_cb, 11, &c->lfe_quant); | |
946 | 1034 | } | |
947 | |||
948 | 1034 | static void put_frame_header(DCAEncContext *c) | |
949 | { | ||
950 | /* SYNC */ | ||
951 | 1034 | put_bits(&c->pb, 16, 0x7ffe); | |
952 | 1034 | put_bits(&c->pb, 16, 0x8001); | |
953 | |||
954 | /* Frame type: normal */ | ||
955 | 1034 | put_bits(&c->pb, 1, 1); | |
956 | |||
957 | /* Deficit sample count: none */ | ||
958 | 1034 | put_bits(&c->pb, 5, 31); | |
959 | |||
960 | /* CRC is not present */ | ||
961 | 1034 | put_bits(&c->pb, 1, 0); | |
962 | |||
963 | /* Number of PCM sample blocks */ | ||
964 | 1034 | put_bits(&c->pb, 7, SUBBAND_SAMPLES - 1); | |
965 | |||
966 | /* Primary frame byte size */ | ||
967 | 1034 | put_bits(&c->pb, 14, c->frame_size - 1); | |
968 | |||
969 | /* Audio channel arrangement */ | ||
970 | 1034 | put_bits(&c->pb, 6, c->channel_config); | |
971 | |||
972 | /* Core audio sampling frequency */ | ||
973 | 1034 | put_bits(&c->pb, 4, bitstream_sfreq[c->samplerate_index]); | |
974 | |||
975 | /* Transmission bit rate */ | ||
976 | 1034 | put_bits(&c->pb, 5, c->bitrate_index); | |
977 | |||
978 | /* Embedded down mix: disabled */ | ||
979 | 1034 | put_bits(&c->pb, 1, 0); | |
980 | |||
981 | /* Embedded dynamic range flag: not present */ | ||
982 | 1034 | put_bits(&c->pb, 1, 0); | |
983 | |||
984 | /* Embedded time stamp flag: not present */ | ||
985 | 1034 | put_bits(&c->pb, 1, 0); | |
986 | |||
987 | /* Auxiliary data flag: not present */ | ||
988 | 1034 | put_bits(&c->pb, 1, 0); | |
989 | |||
990 | /* HDCD source: no */ | ||
991 | 1034 | put_bits(&c->pb, 1, 0); | |
992 | |||
993 | /* Extension audio ID: N/A */ | ||
994 | 1034 | put_bits(&c->pb, 3, 0); | |
995 | |||
996 | /* Extended audio data: not present */ | ||
997 | 1034 | put_bits(&c->pb, 1, 0); | |
998 | |||
999 | /* Audio sync word insertion flag: after each sub-frame */ | ||
1000 | 1034 | put_bits(&c->pb, 1, 0); | |
1001 | |||
1002 | /* Low frequency effects flag: not present or 64x subsampling */ | ||
1003 |
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1034 | put_bits(&c->pb, 2, c->lfe_channel ? 2 : 0); |
1004 | |||
1005 | /* Predictor history switch flag: on */ | ||
1006 | 1034 | put_bits(&c->pb, 1, 1); | |
1007 | |||
1008 | /* No CRC */ | ||
1009 | /* Multirate interpolator switch: non-perfect reconstruction */ | ||
1010 | 1034 | put_bits(&c->pb, 1, 0); | |
1011 | |||
1012 | /* Encoder software revision: 7 */ | ||
1013 | 1034 | put_bits(&c->pb, 4, 7); | |
1014 | |||
1015 | /* Copy history: 0 */ | ||
1016 | 1034 | put_bits(&c->pb, 2, 0); | |
1017 | |||
1018 | /* Source PCM resolution: 16 bits, not DTS ES */ | ||
1019 | 1034 | put_bits(&c->pb, 3, 0); | |
1020 | |||
1021 | /* Front sum/difference coding: no */ | ||
1022 | 1034 | put_bits(&c->pb, 1, 0); | |
1023 | |||
1024 | /* Surrounds sum/difference coding: no */ | ||
1025 | 1034 | put_bits(&c->pb, 1, 0); | |
1026 | |||
1027 | /* Dialog normalization: 0 dB */ | ||
1028 | 1034 | put_bits(&c->pb, 4, 0); | |
1029 | 1034 | } | |
1030 | |||
1031 | 1034 | static void put_primary_audio_header(DCAEncContext *c) | |
1032 | { | ||
1033 | int ch, i; | ||
1034 | /* Number of subframes */ | ||
1035 | 1034 | put_bits(&c->pb, 4, SUBFRAMES - 1); | |
1036 | |||
1037 | /* Number of primary audio channels */ | ||
1038 | 1034 | put_bits(&c->pb, 3, c->fullband_channels - 1); | |
1039 | |||
1040 | /* Subband activity count */ | ||
1041 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) |
1042 | 2068 | put_bits(&c->pb, 5, DCAENC_SUBBANDS - 2); | |
1043 | |||
1044 | /* High frequency VQ start subband */ | ||
1045 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) |
1046 | 2068 | put_bits(&c->pb, 5, DCAENC_SUBBANDS - 1); | |
1047 | |||
1048 | /* Joint intensity coding index: 0, 0 */ | ||
1049 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) |
1050 | 2068 | put_bits(&c->pb, 3, 0); | |
1051 | |||
1052 | /* Transient mode codebook: A4, A4 (arbitrary) */ | ||
1053 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) |
1054 | 2068 | put_bits(&c->pb, 2, 0); | |
1055 | |||
1056 | /* Scale factor code book: 7 bit linear, 7-bit sqrt table (for each channel) */ | ||
1057 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) |
1058 | 2068 | put_bits(&c->pb, 3, 6); | |
1059 | |||
1060 | /* Bit allocation quantizer select: linear 5-bit */ | ||
1061 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) |
1062 | 2068 | put_bits(&c->pb, 3, c->bit_allocation_sel[ch]); | |
1063 | |||
1064 | /* Quantization index codebook select */ | ||
1065 |
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11374 | for (i = 0; i < DCA_CODE_BOOKS; i++) |
1066 |
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31020 | for (ch = 0; ch < c->fullband_channels; ch++) |
1067 | 20680 | put_bits(&c->pb, ff_dca_quant_index_sel_nbits[i], c->quant_index_sel[ch][i]); | |
1068 | |||
1069 | /* Scale factor adjustment index: transmitted in case of Huffman coding */ | ||
1070 |
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11374 | for (i = 0; i < DCA_CODE_BOOKS; i++) |
1071 |
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31020 | for (ch = 0; ch < c->fullband_channels; ch++) |
1072 |
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|
20680 | if (c->quant_index_sel[ch][i] < ff_dca_quant_index_group_size[i]) |
1073 | 5828 | put_bits(&c->pb, 2, 0); | |
1074 | |||
1075 | /* Audio header CRC check word: not transmitted */ | ||
1076 | 1034 | } | |
1077 | |||
1078 | 132352 | static void put_subframe_samples(DCAEncContext *c, int ss, int band, int ch) | |
1079 | { | ||
1080 | int i, j, sum, bits, sel; | ||
1081 |
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|
132352 | if (c->abits[ch][band] <= DCA_CODE_BOOKS) { |
1082 |
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|
20216 | av_assert0(c->abits[ch][band] > 0); |
1083 | 20216 | sel = c->quant_index_sel[ch][c->abits[ch][band] - 1]; | |
1084 | // Huffman codes | ||
1085 |
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20216 | if (sel < ff_dca_quant_index_group_size[c->abits[ch][band] - 1]) { |
1086 | 16068 | ff_dca_vlc_enc_quant(&c->pb, &c->quantized[ch][band][ss * 8], 8, | |
1087 | 16068 | sel, c->abits[ch][band] - 1); | |
1088 | 16068 | return; | |
1089 | } | ||
1090 | |||
1091 | // Block codes | ||
1092 |
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|
4148 | if (c->abits[ch][band] <= 7) { |
1093 |
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5724 | for (i = 0; i < 8; i += 4) { |
1094 | 3816 | sum = 0; | |
1095 |
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19080 | for (j = 3; j >= 0; j--) { |
1096 | 15264 | sum *= ff_dca_quant_levels[c->abits[ch][band]]; | |
1097 | 15264 | sum += c->quantized[ch][band][ss * 8 + i + j]; | |
1098 | 15264 | sum += (ff_dca_quant_levels[c->abits[ch][band]] - 1) / 2; | |
1099 | } | ||
1100 | 3816 | put_bits(&c->pb, bit_consumption[c->abits[ch][band]] / 4, sum); | |
1101 | } | ||
1102 | 1908 | return; | |
1103 | } | ||
1104 | } | ||
1105 | |||
1106 |
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1029384 | for (i = 0; i < 8; i++) { |
1107 | 915008 | bits = bit_consumption[c->abits[ch][band]] / 16; | |
1108 | 915008 | put_sbits(&c->pb, bits, c->quantized[ch][band][ss * 8 + i]); | |
1109 | } | ||
1110 | } | ||
1111 | |||
1112 | 1034 | static void put_subframe(DCAEncContext *c, int subframe) | |
1113 | { | ||
1114 | int i, band, ss, ch; | ||
1115 | |||
1116 | /* Subsubframes count */ | ||
1117 | 1034 | put_bits(&c->pb, 2, SUBSUBFRAMES -1); | |
1118 | |||
1119 | /* Partial subsubframe sample count: dummy */ | ||
1120 | 1034 | put_bits(&c->pb, 3, 0); | |
1121 | |||
1122 | /* Prediction mode: no ADPCM, in each channel and subband */ | ||
1123 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) |
1124 |
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68244 | for (band = 0; band < DCAENC_SUBBANDS; band++) |
1125 | 66176 | put_bits(&c->pb, 1, !(c->prediction_mode[ch][band] == -1)); | |
1126 | |||
1127 | /* Prediction VQ address */ | ||
1128 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) |
1129 |
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68244 | for (band = 0; band < DCAENC_SUBBANDS; band++) |
1130 |
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66176 | if (c->prediction_mode[ch][band] >= 0) |
1131 | ✗ | put_bits(&c->pb, 12, c->prediction_mode[ch][band]); | |
1132 | |||
1133 | /* Bit allocation index */ | ||
1134 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) { |
1135 |
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2068 | if (c->bit_allocation_sel[ch] == 6) { |
1136 |
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68244 | for (band = 0; band < DCAENC_SUBBANDS; band++) { |
1137 | 66176 | put_bits(&c->pb, 5, c->abits[ch][band]); | |
1138 | } | ||
1139 | } else { | ||
1140 | ✗ | ff_dca_vlc_enc_alloc(&c->pb, c->abits[ch], DCAENC_SUBBANDS, | |
1141 | ✗ | c->bit_allocation_sel[ch]); | |
1142 | } | ||
1143 | } | ||
1144 | |||
1145 | if (SUBSUBFRAMES > 1) { | ||
1146 | /* Transition mode: none for each channel and subband */ | ||
1147 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) |
1148 |
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68244 | for (band = 0; band < DCAENC_SUBBANDS; band++) |
1149 |
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66176 | if (c->abits[ch][band]) |
1150 | 66176 | put_bits(&c->pb, 1, 0); /* codebook A4 */ | |
1151 | } | ||
1152 | |||
1153 | /* Scale factors */ | ||
1154 |
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3102 | for (ch = 0; ch < c->fullband_channels; ch++) |
1155 |
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68244 | for (band = 0; band < DCAENC_SUBBANDS; band++) |
1156 |
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66176 | if (c->abits[ch][band]) |
1157 | 66176 | put_bits(&c->pb, 7, c->scale_factor[ch][band]); | |
1158 | |||
1159 | /* Joint subband scale factor codebook select: not transmitted */ | ||
1160 | /* Scale factors for joint subband coding: not transmitted */ | ||
1161 | /* Stereo down-mix coefficients: not transmitted */ | ||
1162 | /* Dynamic range coefficient: not transmitted */ | ||
1163 | /* Stde information CRC check word: not transmitted */ | ||
1164 | /* VQ encoded high frequency subbands: not transmitted */ | ||
1165 | |||
1166 | /* LFE data: 8 samples and scalefactor */ | ||
1167 |
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1034 | if (c->lfe_channel) { |
1168 | ✗ | for (i = 0; i < DCA_LFE_SAMPLES; i++) | |
1169 | ✗ | put_bits(&c->pb, 8, quantize_value(c->downsampled_lfe[i], c->lfe_quant) & 0xff); | |
1170 | ✗ | put_bits(&c->pb, 8, c->lfe_scale_factor); | |
1171 | } | ||
1172 | |||
1173 | /* Audio data (subsubframes) */ | ||
1174 |
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3102 | for (ss = 0; ss < SUBSUBFRAMES ; ss++) |
1175 |
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6204 | for (ch = 0; ch < c->fullband_channels; ch++) |
1176 |
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136488 | for (band = 0; band < DCAENC_SUBBANDS; band++) |
1177 |
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132352 | if (c->abits[ch][band]) |
1178 | 132352 | put_subframe_samples(c, ss, band, ch); | |
1179 | |||
1180 | /* DSYNC */ | ||
1181 | 1034 | put_bits(&c->pb, 16, 0xffff); | |
1182 | 1034 | } | |
1183 | |||
1184 | 1034 | static int encode_frame(AVCodecContext *avctx, AVPacket *avpkt, | |
1185 | const AVFrame *frame, int *got_packet_ptr) | ||
1186 | { | ||
1187 | 1034 | DCAEncContext *c = avctx->priv_data; | |
1188 | const int32_t *samples; | ||
1189 | int ret, i; | ||
1190 | |||
1191 |
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1034 | if ((ret = ff_get_encode_buffer(avctx, avpkt, c->frame_size, 0)) < 0) |
1192 | ✗ | return ret; | |
1193 | |||
1194 | 1034 | samples = (const int32_t *)frame->data[0]; | |
1195 | |||
1196 | 1034 | subband_transform(c, samples); | |
1197 |
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1034 | if (c->lfe_channel) |
1198 | ✗ | lfe_downsample(c, samples); | |
1199 | |||
1200 | 1034 | calc_masking(c, samples); | |
1201 |
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1034 | if (c->options.adpcm_mode) |
1202 | ✗ | adpcm_analysis(c); | |
1203 | 1034 | find_peaks(c); | |
1204 | 1034 | assign_bits(c); | |
1205 | 1034 | calc_lfe_scales(c); | |
1206 | 1034 | shift_history(c, samples); | |
1207 | |||
1208 | 1034 | init_put_bits(&c->pb, avpkt->data, avpkt->size); | |
1209 | 1034 | fill_in_adpcm_bufer(c); | |
1210 | 1034 | put_frame_header(c); | |
1211 | 1034 | put_primary_audio_header(c); | |
1212 |
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2068 | for (i = 0; i < SUBFRAMES; i++) |
1213 | 1034 | put_subframe(c, i); | |
1214 | |||
1215 | 1034 | flush_put_bits(&c->pb); | |
1216 | 1034 | memset(put_bits_ptr(&c->pb), 0, put_bytes_left(&c->pb, 0)); | |
1217 | |||
1218 | 1034 | avpkt->pts = frame->pts; | |
1219 | 1034 | avpkt->duration = ff_samples_to_time_base(avctx, frame->nb_samples); | |
1220 | 1034 | *got_packet_ptr = 1; | |
1221 | 1034 | return 0; | |
1222 | } | ||
1223 | |||
1224 | #define DCAENC_FLAGS AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | ||
1225 | |||
1226 | static const AVOption options[] = { | ||
1227 | { "dca_adpcm", "Use ADPCM encoding", offsetof(DCAEncContext, options.adpcm_mode), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DCAENC_FLAGS }, | ||
1228 | { NULL }, | ||
1229 | }; | ||
1230 | |||
1231 | static const AVClass dcaenc_class = { | ||
1232 | .class_name = "DCA (DTS Coherent Acoustics)", | ||
1233 | .item_name = av_default_item_name, | ||
1234 | .option = options, | ||
1235 | .version = LIBAVUTIL_VERSION_INT, | ||
1236 | }; | ||
1237 | |||
1238 | static const FFCodecDefault defaults[] = { | ||
1239 | { "b", "1411200" }, | ||
1240 | { NULL }, | ||
1241 | }; | ||
1242 | |||
1243 | const FFCodec ff_dca_encoder = { | ||
1244 | .p.name = "dca", | ||
1245 | .p.long_name = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"), | ||
1246 | .p.type = AVMEDIA_TYPE_AUDIO, | ||
1247 | .p.id = AV_CODEC_ID_DTS, | ||
1248 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_EXPERIMENTAL, | ||
1249 | .priv_data_size = sizeof(DCAEncContext), | ||
1250 | .init = encode_init, | ||
1251 | .close = encode_close, | ||
1252 | FF_CODEC_ENCODE_CB(encode_frame), | ||
1253 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, | ||
1254 | .p.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S32, | ||
1255 | AV_SAMPLE_FMT_NONE }, | ||
1256 | .p.supported_samplerates = sample_rates, | ||
1257 | #if FF_API_OLD_CHANNEL_LAYOUT | ||
1258 | .p.channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_MONO, | ||
1259 | AV_CH_LAYOUT_STEREO, | ||
1260 | AV_CH_LAYOUT_2_2, | ||
1261 | AV_CH_LAYOUT_5POINT0, | ||
1262 | AV_CH_LAYOUT_5POINT1, | ||
1263 | 0 }, | ||
1264 | #endif | ||
1265 | .p.ch_layouts = (const AVChannelLayout[]){ | ||
1266 | AV_CHANNEL_LAYOUT_MONO, | ||
1267 | AV_CHANNEL_LAYOUT_STEREO, | ||
1268 | AV_CHANNEL_LAYOUT_2_2, | ||
1269 | AV_CHANNEL_LAYOUT_5POINT0, | ||
1270 | AV_CHANNEL_LAYOUT_5POINT1, | ||
1271 | { 0 }, | ||
1272 | }, | ||
1273 | .defaults = defaults, | ||
1274 | .p.priv_class = &dcaenc_class, | ||
1275 | }; | ||
1276 |