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1 | /* | ||
2 | * MPEG Audio decoder | ||
3 | * Copyright (c) 2001, 2002 Fabrice Bellard | ||
4 | * | ||
5 | * This file is part of FFmpeg. | ||
6 | * | ||
7 | * FFmpeg is free software; you can redistribute it and/or | ||
8 | * modify it under the terms of the GNU Lesser General Public | ||
9 | * License as published by the Free Software Foundation; either | ||
10 | * version 2.1 of the License, or (at your option) any later version. | ||
11 | * | ||
12 | * FFmpeg is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
15 | * Lesser General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU Lesser General Public | ||
18 | * License along with FFmpeg; if not, write to the Free Software | ||
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
20 | */ | ||
21 | |||
22 | /** | ||
23 | * @file | ||
24 | * MPEG Audio decoder | ||
25 | */ | ||
26 | |||
27 | #include "config_components.h" | ||
28 | |||
29 | #include "libavutil/attributes.h" | ||
30 | #include "libavutil/avassert.h" | ||
31 | #include "libavutil/channel_layout.h" | ||
32 | #include "libavutil/crc.h" | ||
33 | #include "libavutil/float_dsp.h" | ||
34 | #include "libavutil/libm.h" | ||
35 | #include "libavutil/mem.h" | ||
36 | #include "libavutil/mem_internal.h" | ||
37 | #include "libavutil/thread.h" | ||
38 | |||
39 | #include "avcodec.h" | ||
40 | #include "decode.h" | ||
41 | #include "get_bits.h" | ||
42 | #include "mathops.h" | ||
43 | #include "mpegaudiodsp.h" | ||
44 | |||
45 | /* | ||
46 | * TODO: | ||
47 | * - test lsf / mpeg25 extensively. | ||
48 | */ | ||
49 | |||
50 | #include "mpegaudio.h" | ||
51 | #include "mpegaudiodecheader.h" | ||
52 | |||
53 | #define BACKSTEP_SIZE 512 | ||
54 | #define EXTRABYTES 24 | ||
55 | #define LAST_BUF_SIZE 2 * BACKSTEP_SIZE + EXTRABYTES | ||
56 | |||
57 | /* layer 3 "granule" */ | ||
58 | typedef struct GranuleDef { | ||
59 | uint8_t scfsi; | ||
60 | int part2_3_length; | ||
61 | int big_values; | ||
62 | int global_gain; | ||
63 | int scalefac_compress; | ||
64 | uint8_t block_type; | ||
65 | uint8_t switch_point; | ||
66 | int table_select[3]; | ||
67 | int subblock_gain[3]; | ||
68 | uint8_t scalefac_scale; | ||
69 | uint8_t count1table_select; | ||
70 | int region_size[3]; /* number of huffman codes in each region */ | ||
71 | int preflag; | ||
72 | int short_start, long_end; /* long/short band indexes */ | ||
73 | uint8_t scale_factors[40]; | ||
74 | DECLARE_ALIGNED(16, INTFLOAT, sb_hybrid)[SBLIMIT * 18]; /* 576 samples */ | ||
75 | } GranuleDef; | ||
76 | |||
77 | typedef struct MPADecodeContext { | ||
78 | MPA_DECODE_HEADER | ||
79 | uint8_t last_buf[LAST_BUF_SIZE]; | ||
80 | int last_buf_size; | ||
81 | int extrasize; | ||
82 | /* next header (used in free format parsing) */ | ||
83 | uint32_t free_format_next_header; | ||
84 | GetBitContext gb; | ||
85 | GetBitContext in_gb; | ||
86 | DECLARE_ALIGNED(32, MPA_INT, synth_buf)[MPA_MAX_CHANNELS][512 * 2]; | ||
87 | int synth_buf_offset[MPA_MAX_CHANNELS]; | ||
88 | DECLARE_ALIGNED(32, INTFLOAT, sb_samples)[MPA_MAX_CHANNELS][36][SBLIMIT]; | ||
89 | INTFLOAT mdct_buf[MPA_MAX_CHANNELS][SBLIMIT * 18]; /* previous samples, for layer 3 MDCT */ | ||
90 | GranuleDef granules[2][2]; /* Used in Layer 3 */ | ||
91 | int adu_mode; ///< 0 for standard mp3, 1 for adu formatted mp3 | ||
92 | int dither_state; | ||
93 | int err_recognition; | ||
94 | AVCodecContext* avctx; | ||
95 | MPADSPContext mpadsp; | ||
96 | void (*butterflies_float)(float *restrict v1, float *restrict v2, int len); | ||
97 | AVFrame *frame; | ||
98 | uint32_t crc; | ||
99 | } MPADecodeContext; | ||
100 | |||
101 | #define HEADER_SIZE 4 | ||
102 | |||
103 | #include "mpegaudiodata.h" | ||
104 | |||
105 | #include "mpegaudio_tablegen.h" | ||
106 | /* intensity stereo coef table */ | ||
107 | static INTFLOAT is_table_lsf[2][2][16]; | ||
108 | |||
109 | /* [i][j]: 2^(-j/3) * FRAC_ONE * 2^(i+2) / (2^(i+2) - 1) */ | ||
110 | static int32_t scale_factor_mult[15][3]; | ||
111 | /* mult table for layer 2 group quantization */ | ||
112 | |||
113 | #define SCALE_GEN(v) \ | ||
114 | { FIXR_OLD(1.0 * (v)), FIXR_OLD(0.7937005259 * (v)), FIXR_OLD(0.6299605249 * (v)) } | ||
115 | |||
116 | static const int32_t scale_factor_mult2[3][3] = { | ||
117 | SCALE_GEN(4.0 / 3.0), /* 3 steps */ | ||
118 | SCALE_GEN(4.0 / 5.0), /* 5 steps */ | ||
119 | SCALE_GEN(4.0 / 9.0), /* 9 steps */ | ||
120 | }; | ||
121 | |||
122 | /** | ||
123 | * Convert region offsets to region sizes and truncate | ||
124 | * size to big_values. | ||
125 | */ | ||
126 | 8146 | static void region_offset2size(GranuleDef *g) | |
127 | { | ||
128 | 8146 | int i, k, j = 0; | |
129 | 8146 | g->region_size[2] = 576 / 2; | |
130 |
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32584 | for (i = 0; i < 3; i++) { |
131 | 24438 | k = FFMIN(g->region_size[i], g->big_values); | |
132 | 24438 | g->region_size[i] = k - j; | |
133 | 24438 | j = k; | |
134 | } | ||
135 | 8146 | } | |
136 | |||
137 | 861 | static void init_short_region(MPADecodeContext *s, GranuleDef *g) | |
138 | { | ||
139 |
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861 | if (g->block_type == 2) { |
140 |
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313 | if (s->sample_rate_index != 8) |
141 | 313 | g->region_size[0] = (36 / 2); | |
142 | else | ||
143 | ✗ | g->region_size[0] = (72 / 2); | |
144 | } else { | ||
145 |
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548 | if (s->sample_rate_index <= 2) |
146 | 547 | g->region_size[0] = (36 / 2); | |
147 |
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1 | else if (s->sample_rate_index != 8) |
148 | 1 | g->region_size[0] = (54 / 2); | |
149 | else | ||
150 | ✗ | g->region_size[0] = (108 / 2); | |
151 | } | ||
152 | 861 | g->region_size[1] = (576 / 2); | |
153 | 861 | } | |
154 | |||
155 | 7285 | static void init_long_region(MPADecodeContext *s, GranuleDef *g, | |
156 | int ra1, int ra2) | ||
157 | { | ||
158 | int l; | ||
159 | 7285 | g->region_size[0] = ff_band_index_long[s->sample_rate_index][ra1 + 1]; | |
160 | /* should not overflow */ | ||
161 | 7285 | l = FFMIN(ra1 + ra2 + 2, 22); | |
162 | 7285 | g->region_size[1] = ff_band_index_long[s->sample_rate_index][ l]; | |
163 | 7285 | } | |
164 | |||
165 | 8146 | static void compute_band_indexes(MPADecodeContext *s, GranuleDef *g) | |
166 | { | ||
167 |
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8146 | if (g->block_type == 2) { |
168 |
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313 | if (g->switch_point) { |
169 |
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13 | if(s->sample_rate_index == 8) |
170 | ✗ | avpriv_request_sample(s->avctx, "switch point in 8khz"); | |
171 | /* if switched mode, we handle the 36 first samples as | ||
172 | long blocks. For 8000Hz, we handle the 72 first | ||
173 | exponents as long blocks */ | ||
174 |
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13 | if (s->sample_rate_index <= 2) |
175 | 13 | g->long_end = 8; | |
176 | else | ||
177 | ✗ | g->long_end = 6; | |
178 | |||
179 | 13 | g->short_start = 3; | |
180 | } else { | ||
181 | 300 | g->long_end = 0; | |
182 | 300 | g->short_start = 0; | |
183 | } | ||
184 | } else { | ||
185 | 7833 | g->short_start = 13; | |
186 | 7833 | g->long_end = 22; | |
187 | } | ||
188 | 8146 | } | |
189 | |||
190 | /* layer 1 unscaling */ | ||
191 | /* n = number of bits of the mantissa minus 1 */ | ||
192 | 5044320 | static inline int l1_unscale(int n, int mant, int scale_factor) | |
193 | { | ||
194 | int shift, mod; | ||
195 | int64_t val; | ||
196 | |||
197 | 5044320 | shift = ff_scale_factor_modshift[scale_factor]; | |
198 | 5044320 | mod = shift & 3; | |
199 | 5044320 | shift >>= 2; | |
200 | 5044320 | val = MUL64((int)(mant + (-1U << n) + 1), scale_factor_mult[n-1][mod]); | |
201 | 5044320 | shift += n; | |
202 | /* NOTE: at this point, 1 <= shift >= 21 + 15 */ | ||
203 | 5044320 | return (int)((val + (1LL << (shift - 1))) >> shift); | |
204 | } | ||
205 | |||
206 | 909720 | static inline int l2_unscale_group(int steps, int mant, int scale_factor) | |
207 | { | ||
208 | int shift, mod, val; | ||
209 | |||
210 | 909720 | shift = ff_scale_factor_modshift[scale_factor]; | |
211 | 909720 | mod = shift & 3; | |
212 | 909720 | shift >>= 2; | |
213 | |||
214 | 909720 | val = (mant - (steps >> 1)) * scale_factor_mult2[steps >> 2][mod]; | |
215 | /* NOTE: at this point, 0 <= shift <= 21 */ | ||
216 |
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909720 | if (shift > 0) |
217 | 909720 | val = (val + (1 << (shift - 1))) >> shift; | |
218 | 909720 | return val; | |
219 | } | ||
220 | |||
221 | /* compute value^(4/3) * 2^(exponent/4). It normalized to FRAC_BITS */ | ||
222 | 56891 | static inline int l3_unscale(int value, int exponent) | |
223 | { | ||
224 | unsigned int m; | ||
225 | int e; | ||
226 | |||
227 | 56891 | e = ff_table_4_3_exp [4 * value + (exponent & 3)]; | |
228 | 56891 | m = ff_table_4_3_value[4 * value + (exponent & 3)]; | |
229 | 56891 | e -= exponent >> 2; | |
230 | #ifdef DEBUG | ||
231 | if(e < 1) | ||
232 | av_log(NULL, AV_LOG_WARNING, "l3_unscale: e is %d\n", e); | ||
233 | #endif | ||
234 |
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56891 | if (e > (SUINT)31) |
235 | 10 | return 0; | |
236 | 56881 | m = (m + ((1U << e) >> 1)) >> e; | |
237 | |||
238 | 56881 | return m; | |
239 | } | ||
240 | |||
241 | 108 | static av_cold void decode_init_static(void) | |
242 | { | ||
243 | int i, j; | ||
244 | |||
245 | /* scale factor multiply for layer 1 */ | ||
246 |
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1728 | for (i = 0; i < 15; i++) { |
247 | int n, norm; | ||
248 | 1620 | n = i + 2; | |
249 | 1620 | norm = ((INT64_C(1) << n) * FRAC_ONE) / ((1 << n) - 1); | |
250 | 1620 | scale_factor_mult[i][0] = MULLx(norm, FIXR(1.0 * 2.0), FRAC_BITS); | |
251 | 1620 | scale_factor_mult[i][1] = MULLx(norm, FIXR(0.7937005259 * 2.0), FRAC_BITS); | |
252 | 1620 | scale_factor_mult[i][2] = MULLx(norm, FIXR(0.6299605249 * 2.0), FRAC_BITS); | |
253 | ff_dlog(NULL, "%d: norm=%x s=%"PRIx32" %"PRIx32" %"PRIx32"\n", i, | ||
254 | (unsigned)norm, | ||
255 | scale_factor_mult[i][0], | ||
256 | scale_factor_mult[i][1], | ||
257 | scale_factor_mult[i][2]); | ||
258 | } | ||
259 | |||
260 | /* compute n ^ (4/3) and store it in mantissa/exp format */ | ||
261 | |||
262 | 108 | mpegaudio_tableinit(); | |
263 | |||
264 |
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1836 | for (i = 0; i < 16; i++) { |
265 | double f; | ||
266 | int e, k; | ||
267 | |||
268 |
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5184 | for (j = 0; j < 2; j++) { |
269 | 3456 | e = -(j + 1) * ((i + 1) >> 1); | |
270 | 3456 | f = exp2(e / 4.0); | |
271 | 3456 | k = i & 1; | |
272 | 3456 | is_table_lsf[j][k ^ 1][i] = FIXR(f); | |
273 | 3456 | is_table_lsf[j][k ][i] = FIXR(1.0); | |
274 | ff_dlog(NULL, "is_table_lsf %d %d: %f %f\n", | ||
275 | i, j, (float) is_table_lsf[j][0][i], | ||
276 | (float) is_table_lsf[j][1][i]); | ||
277 | } | ||
278 | } | ||
279 | 108 | RENAME(ff_mpa_synth_init)(); | |
280 | 108 | ff_mpegaudiodec_common_init_static(); | |
281 | 108 | } | |
282 | |||
283 | 156 | static av_cold int decode_ctx_init(AVCodecContext *avctx, MPADecodeContext *s) | |
284 | { | ||
285 | static AVOnce init_static_once = AV_ONCE_INIT; | ||
286 | |||
287 | 156 | s->avctx = avctx; | |
288 | |||
289 | #if USE_FLOATS | ||
290 | { | ||
291 | AVFloatDSPContext *fdsp; | ||
292 | 82 | fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT); | |
293 |
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82 | if (!fdsp) |
294 | ✗ | return AVERROR(ENOMEM); | |
295 | 82 | s->butterflies_float = fdsp->butterflies_float; | |
296 | 82 | av_free(fdsp); | |
297 | } | ||
298 | #endif | ||
299 | |||
300 | 156 | ff_mpadsp_init(&s->mpadsp); | |
301 | |||
302 |
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156 | if (avctx->request_sample_fmt == OUT_FMT && |
303 | ✗ | avctx->codec_id != AV_CODEC_ID_MP3ON4) | |
304 | ✗ | avctx->sample_fmt = OUT_FMT; | |
305 | else | ||
306 | 156 | avctx->sample_fmt = OUT_FMT_P; | |
307 | 156 | s->err_recognition = avctx->err_recognition; | |
308 | |||
309 |
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156 | if (avctx->codec_id == AV_CODEC_ID_MP3ADU) |
310 | ✗ | s->adu_mode = 1; | |
311 | |||
312 | 156 | ff_thread_once(&init_static_once, decode_init_static); | |
313 | |||
314 | 156 | return 0; | |
315 | } | ||
316 | |||
317 | 156 | static av_cold int decode_init(AVCodecContext *avctx) | |
318 | { | ||
319 | 156 | return decode_ctx_init(avctx, avctx->priv_data); | |
320 | } | ||
321 | |||
322 | #define C3 FIXHR(0.86602540378443864676/2) | ||
323 | #define C4 FIXHR(0.70710678118654752439/2) //0.5 / cos(pi*(9)/36) | ||
324 | #define C5 FIXHR(0.51763809020504152469/2) //0.5 / cos(pi*(5)/36) | ||
325 | #define C6 FIXHR(1.93185165257813657349/4) //0.5 / cos(pi*(15)/36) | ||
326 | |||
327 | /* 12 points IMDCT. We compute it "by hand" by factorizing obvious | ||
328 | cases. */ | ||
329 | 19854 | static void imdct12(INTFLOAT *out, SUINTFLOAT *in) | |
330 | { | ||
331 | SUINTFLOAT in0, in1, in2, in3, in4, in5, t1, t2; | ||
332 | |||
333 | 19854 | in0 = in[0*3]; | |
334 | 19854 | in1 = in[1*3] + in[0*3]; | |
335 | 19854 | in2 = in[2*3] + in[1*3]; | |
336 | 19854 | in3 = in[3*3] + in[2*3]; | |
337 | 19854 | in4 = in[4*3] + in[3*3]; | |
338 | 19854 | in5 = in[5*3] + in[4*3]; | |
339 | 19854 | in5 += in3; | |
340 | 19854 | in3 += in1; | |
341 | |||
342 | 19854 | in2 = MULH3(in2, C3, 2); | |
343 | 19854 | in3 = MULH3(in3, C3, 4); | |
344 | |||
345 | 19854 | t1 = in0 - in4; | |
346 | 19854 | t2 = MULH3(in1 - in5, C4, 2); | |
347 | |||
348 | 19854 | out[ 7] = | |
349 | 19854 | out[10] = t1 + t2; | |
350 | 19854 | out[ 1] = | |
351 | 19854 | out[ 4] = t1 - t2; | |
352 | |||
353 | 19854 | in0 += SHR(in4, 1); | |
354 | 19854 | in4 = in0 + in2; | |
355 | 19854 | in5 += 2*in1; | |
356 | 19854 | in1 = MULH3(in5 + in3, C5, 1); | |
357 | 19854 | out[ 8] = | |
358 | 19854 | out[ 9] = in4 + in1; | |
359 | 19854 | out[ 2] = | |
360 | 19854 | out[ 3] = in4 - in1; | |
361 | |||
362 | 19854 | in0 -= in2; | |
363 | 19854 | in5 = MULH3(in5 - in3, C6, 2); | |
364 | 19854 | out[ 0] = | |
365 | 19854 | out[ 5] = in0 - in5; | |
366 | 19854 | out[ 6] = | |
367 | 19854 | out[11] = in0 + in5; | |
368 | 19854 | } | |
369 | |||
370 | 10150 | static int handle_crc(MPADecodeContext *s, int sec_len) | |
371 | { | ||
372 |
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10150 | if (s->error_protection && (s->err_recognition & AV_EF_CRCCHECK)) { |
373 | ✗ | const uint8_t *buf = s->gb.buffer - HEADER_SIZE; | |
374 | ✗ | int sec_byte_len = sec_len >> 3; | |
375 | ✗ | int sec_rem_bits = sec_len & 7; | |
376 | ✗ | const AVCRC *crc_tab = av_crc_get_table(AV_CRC_16_ANSI); | |
377 | uint8_t tmp_buf[4]; | ||
378 | ✗ | uint32_t crc_val = av_crc(crc_tab, UINT16_MAX, &buf[2], 2); | |
379 | ✗ | crc_val = av_crc(crc_tab, crc_val, &buf[6], sec_byte_len); | |
380 | |||
381 | ✗ | AV_WB32(tmp_buf, | |
382 | ((buf[6 + sec_byte_len] & (0xFF00U >> sec_rem_bits)) << 24) + | ||
383 | ((s->crc << 16) >> sec_rem_bits)); | ||
384 | |||
385 | ✗ | crc_val = av_crc(crc_tab, crc_val, tmp_buf, 3); | |
386 | |||
387 | ✗ | if (crc_val) { | |
388 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", crc_val); | |
389 | ✗ | if (s->err_recognition & AV_EF_EXPLODE) | |
390 | ✗ | return AVERROR_INVALIDDATA; | |
391 | } | ||
392 | } | ||
393 | 10150 | return 0; | |
394 | } | ||
395 | |||
396 | /* return the number of decoded frames */ | ||
397 | ✗ | static int mp_decode_layer1(MPADecodeContext *s) | |
398 | { | ||
399 | int bound, i, v, n, ch, j, mant; | ||
400 | uint8_t allocation[MPA_MAX_CHANNELS][SBLIMIT]; | ||
401 | uint8_t scale_factors[MPA_MAX_CHANNELS][SBLIMIT]; | ||
402 | int ret; | ||
403 | |||
404 | ✗ | ret = handle_crc(s, (s->nb_channels == 1) ? 8*16 : 8*32); | |
405 | ✗ | if (ret < 0) | |
406 | ✗ | return ret; | |
407 | |||
408 | ✗ | if (s->mode == MPA_JSTEREO) | |
409 | ✗ | bound = (s->mode_ext + 1) * 4; | |
410 | else | ||
411 | ✗ | bound = SBLIMIT; | |
412 | |||
413 | /* allocation bits */ | ||
414 | ✗ | for (i = 0; i < bound; i++) { | |
415 | ✗ | for (ch = 0; ch < s->nb_channels; ch++) { | |
416 | ✗ | allocation[ch][i] = get_bits(&s->gb, 4); | |
417 | } | ||
418 | } | ||
419 | ✗ | for (i = bound; i < SBLIMIT; i++) | |
420 | ✗ | allocation[0][i] = get_bits(&s->gb, 4); | |
421 | |||
422 | /* scale factors */ | ||
423 | ✗ | for (i = 0; i < bound; i++) { | |
424 | ✗ | for (ch = 0; ch < s->nb_channels; ch++) { | |
425 | ✗ | if (allocation[ch][i]) | |
426 | ✗ | scale_factors[ch][i] = get_bits(&s->gb, 6); | |
427 | } | ||
428 | } | ||
429 | ✗ | for (i = bound; i < SBLIMIT; i++) { | |
430 | ✗ | if (allocation[0][i]) { | |
431 | ✗ | scale_factors[0][i] = get_bits(&s->gb, 6); | |
432 | ✗ | scale_factors[1][i] = get_bits(&s->gb, 6); | |
433 | } | ||
434 | } | ||
435 | |||
436 | /* compute samples */ | ||
437 | ✗ | for (j = 0; j < 12; j++) { | |
438 | ✗ | for (i = 0; i < bound; i++) { | |
439 | ✗ | for (ch = 0; ch < s->nb_channels; ch++) { | |
440 | ✗ | n = allocation[ch][i]; | |
441 | ✗ | if (n) { | |
442 | ✗ | mant = get_bits(&s->gb, n + 1); | |
443 | ✗ | v = l1_unscale(n, mant, scale_factors[ch][i]); | |
444 | } else { | ||
445 | ✗ | v = 0; | |
446 | } | ||
447 | ✗ | s->sb_samples[ch][j][i] = v; | |
448 | } | ||
449 | } | ||
450 | ✗ | for (i = bound; i < SBLIMIT; i++) { | |
451 | ✗ | n = allocation[0][i]; | |
452 | ✗ | if (n) { | |
453 | ✗ | mant = get_bits(&s->gb, n + 1); | |
454 | ✗ | v = l1_unscale(n, mant, scale_factors[0][i]); | |
455 | ✗ | s->sb_samples[0][j][i] = v; | |
456 | ✗ | v = l1_unscale(n, mant, scale_factors[1][i]); | |
457 | ✗ | s->sb_samples[1][j][i] = v; | |
458 | } else { | ||
459 | ✗ | s->sb_samples[0][j][i] = 0; | |
460 | ✗ | s->sb_samples[1][j][i] = 0; | |
461 | } | ||
462 | } | ||
463 | } | ||
464 | ✗ | return 12; | |
465 | } | ||
466 | |||
467 | 7336 | static int mp_decode_layer2(MPADecodeContext *s) | |
468 | { | ||
469 | int sblimit; /* number of used subbands */ | ||
470 | const unsigned char *alloc_table; | ||
471 | int table, bit_alloc_bits, i, j, ch, bound, v; | ||
472 | unsigned char bit_alloc[MPA_MAX_CHANNELS][SBLIMIT]; | ||
473 | unsigned char scale_code[MPA_MAX_CHANNELS][SBLIMIT]; | ||
474 | unsigned char scale_factors[MPA_MAX_CHANNELS][SBLIMIT][3], *sf; | ||
475 | int scale, qindex, bits, steps, k, l, m, b; | ||
476 | int ret; | ||
477 | |||
478 | /* select decoding table */ | ||
479 | 7336 | table = ff_mpa_l2_select_table(s->bit_rate / 1000, s->nb_channels, | |
480 | s->sample_rate, s->lsf); | ||
481 | 7336 | sblimit = ff_mpa_sblimit_table[table]; | |
482 | 7336 | alloc_table = ff_mpa_alloc_tables[table]; | |
483 | |||
484 |
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7336 | if (s->mode == MPA_JSTEREO) |
485 | ✗ | bound = (s->mode_ext + 1) * 4; | |
486 | else | ||
487 | 7336 | bound = sblimit; | |
488 | |||
489 | ff_dlog(s->avctx, "bound=%d sblimit=%d\n", bound, sblimit); | ||
490 | |||
491 | /* sanity check */ | ||
492 |
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7336 | if (bound > sblimit) |
493 | ✗ | bound = sblimit; | |
494 | |||
495 | /* parse bit allocation */ | ||
496 | 7336 | j = 0; | |
497 |
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224656 | for (i = 0; i < bound; i++) { |
498 | 217320 | bit_alloc_bits = alloc_table[j]; | |
499 |
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455289 | for (ch = 0; ch < s->nb_channels; ch++) |
500 | 237969 | bit_alloc[ch][i] = get_bits(&s->gb, bit_alloc_bits); | |
501 | 217320 | j += 1 << bit_alloc_bits; | |
502 | } | ||
503 |
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7336 | for (i = bound; i < sblimit; i++) { |
504 | ✗ | bit_alloc_bits = alloc_table[j]; | |
505 | ✗ | v = get_bits(&s->gb, bit_alloc_bits); | |
506 | ✗ | bit_alloc[0][i] = v; | |
507 | ✗ | bit_alloc[1][i] = v; | |
508 | ✗ | j += 1 << bit_alloc_bits; | |
509 | } | ||
510 | |||
511 | /* scale codes */ | ||
512 |
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224656 | for (i = 0; i < sblimit; i++) { |
513 |
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455289 | for (ch = 0; ch < s->nb_channels; ch++) { |
514 |
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237969 | if (bit_alloc[ch][i]) |
515 | 165390 | scale_code[ch][i] = get_bits(&s->gb, 2); | |
516 | } | ||
517 | } | ||
518 | |||
519 | 7336 | ret = handle_crc(s, get_bits_count(&s->gb) - 16); | |
520 |
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7336 | if (ret < 0) |
521 | ✗ | return ret; | |
522 | |||
523 | /* scale factors */ | ||
524 |
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224656 | for (i = 0; i < sblimit; i++) { |
525 |
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455289 | for (ch = 0; ch < s->nb_channels; ch++) { |
526 |
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237969 | if (bit_alloc[ch][i]) { |
527 | 165390 | sf = scale_factors[ch][i]; | |
528 |
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165390 | switch (scale_code[ch][i]) { |
529 | 2948 | default: | |
530 | case 0: | ||
531 | 2948 | sf[0] = get_bits(&s->gb, 6); | |
532 | 2948 | sf[1] = get_bits(&s->gb, 6); | |
533 | 2948 | sf[2] = get_bits(&s->gb, 6); | |
534 | 2948 | break; | |
535 | 154784 | case 2: | |
536 | 154784 | sf[0] = get_bits(&s->gb, 6); | |
537 | 154784 | sf[1] = sf[0]; | |
538 | 154784 | sf[2] = sf[0]; | |
539 | 154784 | break; | |
540 | 2545 | case 1: | |
541 | 2545 | sf[0] = get_bits(&s->gb, 6); | |
542 | 2545 | sf[2] = get_bits(&s->gb, 6); | |
543 | 2545 | sf[1] = sf[0]; | |
544 | 2545 | break; | |
545 | 5113 | case 3: | |
546 | 5113 | sf[0] = get_bits(&s->gb, 6); | |
547 | 5113 | sf[2] = get_bits(&s->gb, 6); | |
548 | 5113 | sf[1] = sf[2]; | |
549 | 5113 | break; | |
550 | } | ||
551 | } | ||
552 | } | ||
553 | } | ||
554 | |||
555 | /* samples */ | ||
556 |
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29344 | for (k = 0; k < 3; k++) { |
557 |
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110040 | for (l = 0; l < 12; l += 3) { |
558 | 88032 | j = 0; | |
559 |
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2695872 | for (i = 0; i < bound; i++) { |
560 | 2607840 | bit_alloc_bits = alloc_table[j]; | |
561 |
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5463468 | for (ch = 0; ch < s->nb_channels; ch++) { |
562 | 2855628 | b = bit_alloc[ch][i]; | |
563 |
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2855628 | if (b) { |
564 | 1984680 | scale = scale_factors[ch][i][k]; | |
565 | 1984680 | qindex = alloc_table[j+b]; | |
566 | 1984680 | bits = ff_mpa_quant_bits[qindex]; | |
567 |
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1984680 | if (bits < 0) { |
568 | int v2; | ||
569 | /* 3 values at the same time */ | ||
570 | 303240 | v = get_bits(&s->gb, -bits); | |
571 | 303240 | v2 = ff_division_tabs[qindex][v]; | |
572 | 303240 | steps = ff_mpa_quant_steps[qindex]; | |
573 | |||
574 | 604104 | s->sb_samples[ch][k * 12 + l + 0][i] = | |
575 | 303240 | l2_unscale_group(steps, v2 & 15, scale); | |
576 | 604104 | s->sb_samples[ch][k * 12 + l + 1][i] = | |
577 | 303240 | l2_unscale_group(steps, (v2 >> 4) & 15, scale); | |
578 | 303240 | s->sb_samples[ch][k * 12 + l + 2][i] = | |
579 | 303240 | l2_unscale_group(steps, v2 >> 8 , scale); | |
580 | } else { | ||
581 |
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6725760 | for (m = 0; m < 3; m++) { |
582 | 5044320 | v = get_bits(&s->gb, bits); | |
583 | 5044320 | v = l1_unscale(bits - 1, v, scale); | |
584 | 5044320 | s->sb_samples[ch][k * 12 + l + m][i] = v; | |
585 | } | ||
586 | } | ||
587 | } else { | ||
588 | 870948 | s->sb_samples[ch][k * 12 + l + 0][i] = 0; | |
589 | 870948 | s->sb_samples[ch][k * 12 + l + 1][i] = 0; | |
590 | 870948 | s->sb_samples[ch][k * 12 + l + 2][i] = 0; | |
591 | } | ||
592 | } | ||
593 | /* next subband in alloc table */ | ||
594 | 2607840 | j += 1 << bit_alloc_bits; | |
595 | } | ||
596 | /* XXX: find a way to avoid this duplication of code */ | ||
597 |
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88032 | for (i = bound; i < sblimit; i++) { |
598 | ✗ | bit_alloc_bits = alloc_table[j]; | |
599 | ✗ | b = bit_alloc[0][i]; | |
600 | ✗ | if (b) { | |
601 | int mant, scale0, scale1; | ||
602 | ✗ | scale0 = scale_factors[0][i][k]; | |
603 | ✗ | scale1 = scale_factors[1][i][k]; | |
604 | ✗ | qindex = alloc_table[j + b]; | |
605 | ✗ | bits = ff_mpa_quant_bits[qindex]; | |
606 | ✗ | if (bits < 0) { | |
607 | /* 3 values at the same time */ | ||
608 | ✗ | v = get_bits(&s->gb, -bits); | |
609 | ✗ | steps = ff_mpa_quant_steps[qindex]; | |
610 | ✗ | mant = v % steps; | |
611 | ✗ | v = v / steps; | |
612 | ✗ | s->sb_samples[0][k * 12 + l + 0][i] = | |
613 | ✗ | l2_unscale_group(steps, mant, scale0); | |
614 | ✗ | s->sb_samples[1][k * 12 + l + 0][i] = | |
615 | ✗ | l2_unscale_group(steps, mant, scale1); | |
616 | ✗ | mant = v % steps; | |
617 | ✗ | v = v / steps; | |
618 | ✗ | s->sb_samples[0][k * 12 + l + 1][i] = | |
619 | ✗ | l2_unscale_group(steps, mant, scale0); | |
620 | ✗ | s->sb_samples[1][k * 12 + l + 1][i] = | |
621 | ✗ | l2_unscale_group(steps, mant, scale1); | |
622 | ✗ | s->sb_samples[0][k * 12 + l + 2][i] = | |
623 | ✗ | l2_unscale_group(steps, v, scale0); | |
624 | ✗ | s->sb_samples[1][k * 12 + l + 2][i] = | |
625 | ✗ | l2_unscale_group(steps, v, scale1); | |
626 | } else { | ||
627 | ✗ | for (m = 0; m < 3; m++) { | |
628 | ✗ | mant = get_bits(&s->gb, bits); | |
629 | ✗ | s->sb_samples[0][k * 12 + l + m][i] = | |
630 | ✗ | l1_unscale(bits - 1, mant, scale0); | |
631 | ✗ | s->sb_samples[1][k * 12 + l + m][i] = | |
632 | ✗ | l1_unscale(bits - 1, mant, scale1); | |
633 | } | ||
634 | } | ||
635 | } else { | ||
636 | ✗ | s->sb_samples[0][k * 12 + l + 0][i] = 0; | |
637 | ✗ | s->sb_samples[0][k * 12 + l + 1][i] = 0; | |
638 | ✗ | s->sb_samples[0][k * 12 + l + 2][i] = 0; | |
639 | ✗ | s->sb_samples[1][k * 12 + l + 0][i] = 0; | |
640 | ✗ | s->sb_samples[1][k * 12 + l + 1][i] = 0; | |
641 | ✗ | s->sb_samples[1][k * 12 + l + 2][i] = 0; | |
642 | } | ||
643 | /* next subband in alloc table */ | ||
644 | ✗ | j += 1 << bit_alloc_bits; | |
645 | } | ||
646 | /* fill remaining samples to zero */ | ||
647 |
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297216 | for (i = sblimit; i < SBLIMIT; i++) { |
648 |
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454356 | for (ch = 0; ch < s->nb_channels; ch++) { |
649 | 245172 | s->sb_samples[ch][k * 12 + l + 0][i] = 0; | |
650 | 245172 | s->sb_samples[ch][k * 12 + l + 1][i] = 0; | |
651 | 245172 | s->sb_samples[ch][k * 12 + l + 2][i] = 0; | |
652 | } | ||
653 | } | ||
654 | } | ||
655 | } | ||
656 | 7336 | return 3 * 12; | |
657 | } | ||
658 | |||
659 | #define SPLIT(dst,sf,n) \ | ||
660 | if (n == 3) { \ | ||
661 | int m = (sf * 171) >> 9; \ | ||
662 | dst = sf - 3 * m; \ | ||
663 | sf = m; \ | ||
664 | } else if (n == 4) { \ | ||
665 | dst = sf & 3; \ | ||
666 | sf >>= 2; \ | ||
667 | } else if (n == 5) { \ | ||
668 | int m = (sf * 205) >> 10; \ | ||
669 | dst = sf - 5 * m; \ | ||
670 | sf = m; \ | ||
671 | } else if (n == 6) { \ | ||
672 | int m = (sf * 171) >> 10; \ | ||
673 | dst = sf - 6 * m; \ | ||
674 | sf = m; \ | ||
675 | } else { \ | ||
676 | dst = 0; \ | ||
677 | } | ||
678 | |||
679 | 4 | static av_always_inline void lsf_sf_expand(int *slen, int sf, int n1, int n2, | |
680 | int n3) | ||
681 | { | ||
682 |
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4 | SPLIT(slen[3], sf, n3) |
683 |
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4 | SPLIT(slen[2], sf, n2) |
684 |
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4 | SPLIT(slen[1], sf, n1) |
685 | 4 | slen[0] = sf; | |
686 | 4 | } | |
687 | |||
688 | 8138 | static void exponents_from_scale_factors(MPADecodeContext *s, GranuleDef *g, | |
689 | int16_t *exponents) | ||
690 | { | ||
691 | const uint8_t *bstab, *pretab; | ||
692 | int len, i, j, k, l, v0, shift, gain, gains[3]; | ||
693 | int16_t *exp_ptr; | ||
694 | |||
695 | 8138 | exp_ptr = exponents; | |
696 | 8138 | gain = g->global_gain - 210; | |
697 | 8138 | shift = g->scalefac_scale + 1; | |
698 | |||
699 | 8138 | bstab = ff_band_size_long[s->sample_rate_index]; | |
700 | 8138 | pretab = ff_mpa_pretab[g->preflag]; | |
701 |
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180436 | for (i = 0; i < g->long_end; i++) { |
702 | 172298 | v0 = gain - ((g->scale_factors[i] + pretab[i]) << shift) + 400; | |
703 | 172298 | len = bstab[i]; | |
704 |
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4681118 | for (j = len; j > 0; j--) |
705 | 4508820 | *exp_ptr++ = v0; | |
706 | } | ||
707 | |||
708 |
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8138 | if (g->short_start < 13) { |
709 | 311 | bstab = ff_band_size_short[s->sample_rate_index]; | |
710 | 311 | gains[0] = gain - (g->subblock_gain[0] << 3); | |
711 | 311 | gains[1] = gain - (g->subblock_gain[1] << 3); | |
712 | 311 | gains[2] = gain - (g->subblock_gain[2] << 3); | |
713 | 311 | k = g->long_end; | |
714 |
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4315 | for (i = g->short_start; i < 13; i++) { |
715 | 4004 | len = bstab[i]; | |
716 |
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16016 | for (l = 0; l < 3; l++) { |
717 | 12012 | v0 = gains[l] - (g->scale_factors[k++] << shift) + 400; | |
718 |
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190680 | for (j = len; j > 0; j--) |
719 | 178668 | *exp_ptr++ = v0; | |
720 | } | ||
721 | } | ||
722 | } | ||
723 | 8138 | } | |
724 | |||
725 | 16851 | static void switch_buffer(MPADecodeContext *s, int *pos, int *end_pos, | |
726 | int *end_pos2) | ||
727 | { | ||
728 |
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16851 | if (s->in_gb.buffer && *pos >= s->gb.size_in_bits - s->extrasize * 8) { |
729 | 939 | s->gb = s->in_gb; | |
730 | 939 | s->in_gb.buffer = NULL; | |
731 | 939 | s->extrasize = 0; | |
732 | av_assert2((get_bits_count(&s->gb) & 7) == 0); | ||
733 | 939 | skip_bits_long(&s->gb, *pos - *end_pos); | |
734 | 939 | *end_pos2 = | |
735 | 939 | *end_pos = *end_pos2 + get_bits_count(&s->gb) - *pos; | |
736 | 939 | *pos = get_bits_count(&s->gb); | |
737 | } | ||
738 | 16851 | } | |
739 | |||
740 | /* Following is an optimized code for | ||
741 | INTFLOAT v = *src | ||
742 | if(get_bits1(&s->gb)) | ||
743 | v = -v; | ||
744 | *dst = v; | ||
745 | */ | ||
746 | #if USE_FLOATS | ||
747 | #define READ_FLIP_SIGN(dst,src) \ | ||
748 | v = AV_RN32A(src) ^ (get_bits1(&s->gb) << 31); \ | ||
749 | AV_WN32A(dst, v); | ||
750 | #else | ||
751 | #define READ_FLIP_SIGN(dst,src) \ | ||
752 | v = -get_bits1(&s->gb); \ | ||
753 | *(dst) = (*(src) ^ v) - v; | ||
754 | #endif | ||
755 | |||
756 | 8138 | static int huffman_decode(MPADecodeContext *s, GranuleDef *g, | |
757 | int16_t *exponents, int end_pos2) | ||
758 | { | ||
759 | int s_index; | ||
760 | int i; | ||
761 | int last_pos, bits_left; | ||
762 | VLC *vlc; | ||
763 | 8138 | int end_pos = FFMIN(end_pos2, s->gb.size_in_bits - s->extrasize * 8); | |
764 | |||
765 | /* low frequencies (called big values) */ | ||
766 | 8138 | s_index = 0; | |
767 |
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32552 | for (i = 0; i < 3; i++) { |
768 | const VLCElem *vlctab; | ||
769 | int j, k, l, linbits; | ||
770 | 24414 | j = g->region_size[i]; | |
771 |
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24414 | if (j == 0) |
772 | 1345 | continue; | |
773 | /* select vlc table */ | ||
774 | 23069 | k = g->table_select[i]; | |
775 | 23069 | l = ff_mpa_huff_data[k][0]; | |
776 | 23069 | linbits = ff_mpa_huff_data[k][1]; | |
777 | |||
778 |
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23069 | if (!l) { |
779 | 92 | memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid) * 2 * j); | |
780 | 92 | s_index += 2 * j; | |
781 | 92 | continue; | |
782 | } | ||
783 | 22977 | vlctab = ff_huff_vlc[l]; | |
784 | |||
785 | /* read huffcode and compute each couple */ | ||
786 |
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911329 | for (; j > 0; j--) { |
787 | int exponent, x, y; | ||
788 | int v; | ||
789 | 888352 | int pos = get_bits_count(&s->gb); | |
790 | |||
791 |
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888352 | if (pos >= end_pos){ |
792 | 789 | switch_buffer(s, &pos, &end_pos, &end_pos2); | |
793 |
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789 | if (pos >= end_pos) |
794 | ✗ | break; | |
795 | } | ||
796 | 888352 | y = get_vlc2(&s->gb, vlctab, 7, 3); | |
797 | |||
798 |
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888352 | if (!y) { |
799 | 216377 | g->sb_hybrid[s_index ] = | |
800 | 216377 | g->sb_hybrid[s_index + 1] = 0; | |
801 | 216377 | s_index += 2; | |
802 | 216377 | continue; | |
803 | } | ||
804 | |||
805 | 671975 | exponent= exponents[s_index]; | |
806 | |||
807 | ff_dlog(s->avctx, "region=%d n=%d y=%d exp=%d\n", | ||
808 | i, g->region_size[i] - j, y, exponent); | ||
809 |
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671975 | if (y & 16) { |
810 | 427016 | x = y >> 5; | |
811 | 427016 | y = y & 0x0f; | |
812 |
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427016 | if (x < 15) { |
813 | 400996 | READ_FLIP_SIGN(g->sb_hybrid + s_index, RENAME(expval_table)[exponent] + x) | |
814 | } else { | ||
815 | 26020 | x += get_bitsz(&s->gb, linbits); | |
816 | 26020 | v = l3_unscale(x, exponent); | |
817 |
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26020 | if (get_bits1(&s->gb)) |
818 | 12480 | v = -v; | |
819 | 26020 | g->sb_hybrid[s_index] = v; | |
820 | } | ||
821 |
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|
427016 | if (y < 15) { |
822 | 401952 | READ_FLIP_SIGN(g->sb_hybrid + s_index + 1, RENAME(expval_table)[exponent] + y) | |
823 | } else { | ||
824 | 25064 | y += get_bitsz(&s->gb, linbits); | |
825 | 25064 | v = l3_unscale(y, exponent); | |
826 |
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|
25064 | if (get_bits1(&s->gb)) |
827 | 11937 | v = -v; | |
828 | 25064 | g->sb_hybrid[s_index + 1] = v; | |
829 | } | ||
830 | } else { | ||
831 | 244959 | x = y >> 5; | |
832 | 244959 | y = y & 0x0f; | |
833 | 244959 | x += y; | |
834 |
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244959 | if (x < 15) { |
835 |
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239152 | READ_FLIP_SIGN(g->sb_hybrid + s_index + !!y, RENAME(expval_table)[exponent] + x) |
836 | } else { | ||
837 | 5807 | x += get_bitsz(&s->gb, linbits); | |
838 | 5807 | v = l3_unscale(x, exponent); | |
839 |
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|
5807 | if (get_bits1(&s->gb)) |
840 | 2116 | v = -v; | |
841 | 5807 | g->sb_hybrid[s_index+!!y] = v; | |
842 | } | ||
843 | 244959 | g->sb_hybrid[s_index + !y] = 0; | |
844 | } | ||
845 | 671975 | s_index += 2; | |
846 | } | ||
847 | } | ||
848 | |||
849 | /* high frequencies */ | ||
850 | 8138 | vlc = &ff_huff_quad_vlc[g->count1table_select]; | |
851 | 8138 | last_pos = 0; | |
852 |
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|
227243 | while (s_index <= 572) { |
853 | int pos, code; | ||
854 | 226942 | pos = get_bits_count(&s->gb); | |
855 |
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226942 | if (pos >= end_pos) { |
856 |
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|
7924 | if (pos > end_pos2 && last_pos) { |
857 | /* some encoders generate an incorrect size for this | ||
858 | part. We must go back into the data */ | ||
859 | ✗ | s_index -= 4; | |
860 | ✗ | skip_bits_long(&s->gb, last_pos - pos); | |
861 | ✗ | av_log(s->avctx, AV_LOG_INFO, "overread, skip %d enddists: %d %d\n", last_pos - pos, end_pos-pos, end_pos2-pos); | |
862 | ✗ | if(s->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)) | |
863 | ✗ | s_index=0; | |
864 | 7837 | break; | |
865 | } | ||
866 | 7924 | switch_buffer(s, &pos, &end_pos, &end_pos2); | |
867 |
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|
7924 | if (pos >= end_pos) |
868 | 7837 | break; | |
869 | } | ||
870 | 219105 | last_pos = pos; | |
871 | |||
872 | 219105 | code = get_vlc2(&s->gb, vlc->table, vlc->bits, 1); | |
873 | ff_dlog(s->avctx, "t=%d code=%d\n", g->count1table_select, code); | ||
874 | 219105 | g->sb_hybrid[s_index + 0] = | |
875 | 219105 | g->sb_hybrid[s_index + 1] = | |
876 | 219105 | g->sb_hybrid[s_index + 2] = | |
877 | 219105 | g->sb_hybrid[s_index + 3] = 0; | |
878 |
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|
368106 | while (code) { |
879 | static const int idxtab[16] = { 3,3,2,2,1,1,1,1,0,0,0,0,0,0,0,0 }; | ||
880 | int v; | ||
881 | 149001 | int pos = s_index + idxtab[code]; | |
882 | 149001 | code ^= 8 >> idxtab[code]; | |
883 | 149001 | READ_FLIP_SIGN(g->sb_hybrid + pos, RENAME(exp_table)+exponents[pos]) | |
884 | } | ||
885 | 219105 | s_index += 4; | |
886 | } | ||
887 | /* skip extension bits */ | ||
888 | 8138 | bits_left = end_pos2 - get_bits_count(&s->gb); | |
889 |
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8138 | if (bits_left < 0 && (s->err_recognition & (AV_EF_BUFFER|AV_EF_COMPLIANT))) { |
890 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "bits_left=%d\n", bits_left); | |
891 | ✗ | s_index=0; | |
892 |
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8138 | } else if (bits_left > 0 && (s->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE))) { |
893 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "bits_left=%d\n", bits_left); | |
894 | ✗ | s_index = 0; | |
895 | } | ||
896 | 8138 | memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid) * (576 - s_index)); | |
897 | 8138 | skip_bits_long(&s->gb, bits_left); | |
898 | |||
899 | 8138 | i = get_bits_count(&s->gb); | |
900 | 8138 | switch_buffer(s, &i, &end_pos, &end_pos2); | |
901 | |||
902 | 8138 | return 0; | |
903 | } | ||
904 | |||
905 | /* Reorder short blocks from bitstream order to interleaved order. It | ||
906 | would be faster to do it in parsing, but the code would be far more | ||
907 | complicated */ | ||
908 | 8138 | static void reorder_block(MPADecodeContext *s, GranuleDef *g) | |
909 | { | ||
910 | int i, j, len; | ||
911 | INTFLOAT *ptr, *dst, *ptr1; | ||
912 | INTFLOAT tmp[576]; | ||
913 | |||
914 |
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|
8138 | if (g->block_type != 2) |
915 | 7827 | return; | |
916 | |||
917 |
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|
311 | if (g->switch_point) { |
918 |
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|
13 | if (s->sample_rate_index != 8) |
919 | 13 | ptr = g->sb_hybrid + 36; | |
920 | else | ||
921 | ✗ | ptr = g->sb_hybrid + 72; | |
922 | } else { | ||
923 | 298 | ptr = g->sb_hybrid; | |
924 | } | ||
925 | |||
926 |
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|
4315 | for (i = g->short_start; i < 13; i++) { |
927 | 4004 | len = ff_band_size_short[s->sample_rate_index][i]; | |
928 | 4004 | ptr1 = ptr; | |
929 | 4004 | dst = tmp; | |
930 |
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|
63560 | for (j = len; j > 0; j--) { |
931 | 59556 | *dst++ = ptr[0*len]; | |
932 | 59556 | *dst++ = ptr[1*len]; | |
933 | 59556 | *dst++ = ptr[2*len]; | |
934 | 59556 | ptr++; | |
935 | } | ||
936 | 4004 | ptr += 2 * len; | |
937 | 4004 | memcpy(ptr1, tmp, len * 3 * sizeof(*ptr1)); | |
938 | } | ||
939 | } | ||
940 | |||
941 | #define ISQRT2 FIXR(0.70710678118654752440) | ||
942 | |||
943 | 2455 | static void compute_stereo(MPADecodeContext *s, GranuleDef *g0, GranuleDef *g1) | |
944 | { | ||
945 | int i, j, k, l; | ||
946 | int sf_max, sf, len, non_zero_found; | ||
947 | INTFLOAT *tab0, *tab1, v1, v2; | ||
948 | const INTFLOAT (*is_tab)[16]; | ||
949 | SUINTFLOAT tmp0, tmp1; | ||
950 | int non_zero_found_short[3]; | ||
951 | |||
952 | /* intensity stereo */ | ||
953 |
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|
2455 | if (s->mode_ext & MODE_EXT_I_STEREO) { |
954 |
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|
1 | if (!s->lsf) { |
955 | ✗ | is_tab = is_table; | |
956 | ✗ | sf_max = 7; | |
957 | } else { | ||
958 | 1 | is_tab = is_table_lsf[g1->scalefac_compress & 1]; | |
959 | 1 | sf_max = 16; | |
960 | } | ||
961 | |||
962 | 1 | tab0 = g0->sb_hybrid + 576; | |
963 | 1 | tab1 = g1->sb_hybrid + 576; | |
964 | |||
965 | 1 | non_zero_found_short[0] = 0; | |
966 | 1 | non_zero_found_short[1] = 0; | |
967 | 1 | non_zero_found_short[2] = 0; | |
968 | 1 | k = (13 - g1->short_start) * 3 + g1->long_end - 3; | |
969 |
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|
1 | for (i = 12; i >= g1->short_start; i--) { |
970 | /* for last band, use previous scale factor */ | ||
971 | ✗ | if (i != 11) | |
972 | ✗ | k -= 3; | |
973 | ✗ | len = ff_band_size_short[s->sample_rate_index][i]; | |
974 | ✗ | for (l = 2; l >= 0; l--) { | |
975 | ✗ | tab0 -= len; | |
976 | ✗ | tab1 -= len; | |
977 | ✗ | if (!non_zero_found_short[l]) { | |
978 | /* test if non zero band. if so, stop doing i-stereo */ | ||
979 | ✗ | for (j = 0; j < len; j++) { | |
980 | ✗ | if (tab1[j] != 0) { | |
981 | ✗ | non_zero_found_short[l] = 1; | |
982 | ✗ | goto found1; | |
983 | } | ||
984 | } | ||
985 | ✗ | sf = g1->scale_factors[k + l]; | |
986 | ✗ | if (sf >= sf_max) | |
987 | ✗ | goto found1; | |
988 | |||
989 | ✗ | v1 = is_tab[0][sf]; | |
990 | ✗ | v2 = is_tab[1][sf]; | |
991 | ✗ | for (j = 0; j < len; j++) { | |
992 | ✗ | tmp0 = tab0[j]; | |
993 | ✗ | tab0[j] = MULLx(tmp0, v1, FRAC_BITS); | |
994 | ✗ | tab1[j] = MULLx(tmp0, v2, FRAC_BITS); | |
995 | } | ||
996 | } else { | ||
997 | ✗ | found1: | |
998 | ✗ | if (s->mode_ext & MODE_EXT_MS_STEREO) { | |
999 | /* lower part of the spectrum : do ms stereo | ||
1000 | if enabled */ | ||
1001 | ✗ | for (j = 0; j < len; j++) { | |
1002 | ✗ | tmp0 = tab0[j]; | |
1003 | ✗ | tmp1 = tab1[j]; | |
1004 | ✗ | tab0[j] = MULLx(tmp0 + tmp1, ISQRT2, FRAC_BITS); | |
1005 | ✗ | tab1[j] = MULLx(tmp0 - tmp1, ISQRT2, FRAC_BITS); | |
1006 | } | ||
1007 | } | ||
1008 | } | ||
1009 | } | ||
1010 | } | ||
1011 | |||
1012 | 1 | non_zero_found = non_zero_found_short[0] | | |
1013 | 1 | non_zero_found_short[1] | | |
1014 | 1 | non_zero_found_short[2]; | |
1015 | |||
1016 |
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|
23 | for (i = g1->long_end - 1;i >= 0;i--) { |
1017 | 22 | len = ff_band_size_long[s->sample_rate_index][i]; | |
1018 | 22 | tab0 -= len; | |
1019 | 22 | tab1 -= len; | |
1020 | /* test if non zero band. if so, stop doing i-stereo */ | ||
1021 |
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22 | if (!non_zero_found) { |
1022 |
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598 | for (j = 0; j < len; j++) { |
1023 |
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|
576 | if (tab1[j] != 0) { |
1024 | ✗ | non_zero_found = 1; | |
1025 | ✗ | goto found2; | |
1026 | } | ||
1027 | } | ||
1028 | /* for last band, use previous scale factor */ | ||
1029 |
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22 | k = (i == 21) ? 20 : i; |
1030 | 22 | sf = g1->scale_factors[k]; | |
1031 |
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|
22 | if (sf >= sf_max) |
1032 | ✗ | goto found2; | |
1033 | 22 | v1 = is_tab[0][sf]; | |
1034 | 22 | v2 = is_tab[1][sf]; | |
1035 |
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598 | for (j = 0; j < len; j++) { |
1036 | 576 | tmp0 = tab0[j]; | |
1037 | 576 | tab0[j] = MULLx(tmp0, v1, FRAC_BITS); | |
1038 | 576 | tab1[j] = MULLx(tmp0, v2, FRAC_BITS); | |
1039 | } | ||
1040 | } else { | ||
1041 | ✗ | found2: | |
1042 | ✗ | if (s->mode_ext & MODE_EXT_MS_STEREO) { | |
1043 | /* lower part of the spectrum : do ms stereo | ||
1044 | if enabled */ | ||
1045 | ✗ | for (j = 0; j < len; j++) { | |
1046 | ✗ | tmp0 = tab0[j]; | |
1047 | ✗ | tmp1 = tab1[j]; | |
1048 | ✗ | tab0[j] = MULLx(tmp0 + tmp1, ISQRT2, FRAC_BITS); | |
1049 | ✗ | tab1[j] = MULLx(tmp0 - tmp1, ISQRT2, FRAC_BITS); | |
1050 | } | ||
1051 | } | ||
1052 | } | ||
1053 | } | ||
1054 |
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|
2454 | } else if (s->mode_ext & MODE_EXT_MS_STEREO) { |
1055 | /* ms stereo ONLY */ | ||
1056 | /* NOTE: the 1/sqrt(2) normalization factor is included in the | ||
1057 | global gain */ | ||
1058 | #if USE_FLOATS | ||
1059 | 58 | s->butterflies_float(g0->sb_hybrid, g1->sb_hybrid, 576); | |
1060 | #else | ||
1061 | 2176 | tab0 = g0->sb_hybrid; | |
1062 | 2176 | tab1 = g1->sb_hybrid; | |
1063 |
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1255552 | for (i = 0; i < 576; i++) { |
1064 | 1253376 | tmp0 = tab0[i]; | |
1065 | 1253376 | tmp1 = tab1[i]; | |
1066 | 1253376 | tab0[i] = tmp0 + tmp1; | |
1067 | 1253376 | tab1[i] = tmp0 - tmp1; | |
1068 | } | ||
1069 | #endif | ||
1070 | } | ||
1071 | 2455 | } | |
1072 | |||
1073 | #if USE_FLOATS | ||
1074 | #if HAVE_MIPSFPU | ||
1075 | # include "mips/compute_antialias_float.h" | ||
1076 | #endif /* HAVE_MIPSFPU */ | ||
1077 | #else | ||
1078 | #if HAVE_MIPSDSP | ||
1079 | # include "mips/compute_antialias_fixed.h" | ||
1080 | #endif /* HAVE_MIPSDSP */ | ||
1081 | #endif /* USE_FLOATS */ | ||
1082 | |||
1083 | #ifndef compute_antialias | ||
1084 | #if USE_FLOATS | ||
1085 | #define AA(j) do { \ | ||
1086 | float tmp0 = ptr[-1-j]; \ | ||
1087 | float tmp1 = ptr[ j]; \ | ||
1088 | ptr[-1-j] = tmp0 * csa_table[j][0] - tmp1 * csa_table[j][1]; \ | ||
1089 | ptr[ j] = tmp0 * csa_table[j][1] + tmp1 * csa_table[j][0]; \ | ||
1090 | } while (0) | ||
1091 | #else | ||
1092 | #define AA(j) do { \ | ||
1093 | SUINT tmp0 = ptr[-1-j]; \ | ||
1094 | SUINT tmp1 = ptr[ j]; \ | ||
1095 | SUINT tmp2 = MULH(tmp0 + tmp1, csa_table[j][0]); \ | ||
1096 | ptr[-1-j] = 4 * (tmp2 - MULH(tmp1, csa_table[j][2])); \ | ||
1097 | ptr[ j] = 4 * (tmp2 + MULH(tmp0, csa_table[j][3])); \ | ||
1098 | } while (0) | ||
1099 | #endif | ||
1100 | |||
1101 | 8138 | static void compute_antialias(MPADecodeContext *s, GranuleDef *g) | |
1102 | { | ||
1103 | INTFLOAT *ptr; | ||
1104 | int n, i; | ||
1105 | |||
1106 | /* we antialias only "long" bands */ | ||
1107 |
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8138 | if (g->block_type == 2) { |
1108 |
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311 | if (!g->switch_point) |
1109 | 298 | return; | |
1110 | /* XXX: check this for 8000Hz case */ | ||
1111 | 13 | n = 1; | |
1112 | } else { | ||
1113 | 7827 | n = SBLIMIT - 1; | |
1114 | } | ||
1115 | |||
1116 | 7840 | ptr = g->sb_hybrid + 18; | |
1117 |
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250490 | for (i = n; i > 0; i--) { |
1118 | 242650 | AA(0); | |
1119 | 242650 | AA(1); | |
1120 | 242650 | AA(2); | |
1121 | 242650 | AA(3); | |
1122 | 242650 | AA(4); | |
1123 | 242650 | AA(5); | |
1124 | 242650 | AA(6); | |
1125 | 242650 | AA(7); | |
1126 | |||
1127 | 242650 | ptr += 18; | |
1128 | } | ||
1129 | } | ||
1130 | #endif /* compute_antialias */ | ||
1131 | |||
1132 | 8146 | static void compute_imdct(MPADecodeContext *s, GranuleDef *g, | |
1133 | INTFLOAT *sb_samples, INTFLOAT *mdct_buf) | ||
1134 | { | ||
1135 | INTFLOAT *win, *out_ptr, *ptr, *buf, *ptr1; | ||
1136 | INTFLOAT out2[12]; | ||
1137 | int i, j, mdct_long_end, sblimit; | ||
1138 | |||
1139 | /* find last non zero block */ | ||
1140 | 8146 | ptr = g->sb_hybrid + 576; | |
1141 | 8146 | ptr1 = g->sb_hybrid + 2 * 18; | |
1142 |
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313889 | while (ptr >= ptr1) { |
1143 | int32_t *p; | ||
1144 | 313691 | ptr -= 6; | |
1145 | 313691 | p = (int32_t*)ptr; | |
1146 |
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313691 | if (p[0] | p[1] | p[2] | p[3] | p[4] | p[5]) |
1147 | 7948 | break; | |
1148 | } | ||
1149 | 8146 | sblimit = ((ptr - g->sb_hybrid) / 18) + 1; | |
1150 | |||
1151 |
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8146 | if (g->block_type == 2) { |
1152 | /* XXX: check for 8000 Hz */ | ||
1153 |
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313 | if (g->switch_point) |
1154 | 13 | mdct_long_end = 2; | |
1155 | else | ||
1156 | 300 | mdct_long_end = 0; | |
1157 | } else { | ||
1158 | 7833 | mdct_long_end = sblimit; | |
1159 | } | ||
1160 | |||
1161 | 8146 | s->mpadsp.RENAME(imdct36_blocks)(sb_samples, mdct_buf, g->sb_hybrid, | |
1162 | 8146 | mdct_long_end, g->switch_point, | |
1163 | 8146 | g->block_type); | |
1164 | |||
1165 | 8146 | buf = mdct_buf + 4*18*(mdct_long_end >> 2) + (mdct_long_end & 3); | |
1166 | 8146 | ptr = g->sb_hybrid + 18 * mdct_long_end; | |
1167 | |||
1168 |
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14764 | for (j = mdct_long_end; j < sblimit; j++) { |
1169 | /* select frequency inversion */ | ||
1170 | 6618 | win = RENAME(ff_mdct_win)[2 + (4 & -(j & 1))]; | |
1171 | 6618 | out_ptr = sb_samples + j; | |
1172 | |||
1173 |
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46326 | for (i = 0; i < 6; i++) { |
1174 | 39708 | *out_ptr = buf[4*i]; | |
1175 | 39708 | out_ptr += SBLIMIT; | |
1176 | } | ||
1177 | 6618 | imdct12(out2, ptr + 0); | |
1178 |
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46326 | for (i = 0; i < 6; i++) { |
1179 | 39708 | *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*1)]; | |
1180 | 39708 | buf[4*(i + 6*2)] = MULH3(out2[i + 6], win[i + 6], 1); | |
1181 | 39708 | out_ptr += SBLIMIT; | |
1182 | } | ||
1183 | 6618 | imdct12(out2, ptr + 1); | |
1184 |
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46326 | for (i = 0; i < 6; i++) { |
1185 | 39708 | *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*2)]; | |
1186 | 39708 | buf[4*(i + 6*0)] = MULH3(out2[i + 6], win[i + 6], 1); | |
1187 | 39708 | out_ptr += SBLIMIT; | |
1188 | } | ||
1189 | 6618 | imdct12(out2, ptr + 2); | |
1190 |
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46326 | for (i = 0; i < 6; i++) { |
1191 | 39708 | buf[4*(i + 6*0)] = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*0)]; | |
1192 | 39708 | buf[4*(i + 6*1)] = MULH3(out2[i + 6], win[i + 6], 1); | |
1193 | 39708 | buf[4*(i + 6*2)] = 0; | |
1194 | } | ||
1195 | 6618 | ptr += 18; | |
1196 |
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6618 | buf += (j&3) != 3 ? 1 : (4*18-3); |
1197 | } | ||
1198 | /* zero bands */ | ||
1199 |
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106315 | for (j = sblimit; j < SBLIMIT; j++) { |
1200 | /* overlap */ | ||
1201 | 98169 | out_ptr = sb_samples + j; | |
1202 |
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1865211 | for (i = 0; i < 18; i++) { |
1203 | 1767042 | *out_ptr = buf[4*i]; | |
1204 | 1767042 | buf[4*i] = 0; | |
1205 | 1767042 | out_ptr += SBLIMIT; | |
1206 | } | ||
1207 |
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|
98169 | buf += (j&3) != 3 ? 1 : (4*18-3); |
1208 | } | ||
1209 | 8146 | } | |
1210 | |||
1211 | /* main layer3 decoding function */ | ||
1212 | 2814 | static int mp_decode_layer3(MPADecodeContext *s) | |
1213 | { | ||
1214 | int nb_granules, main_data_begin; | ||
1215 | int gr, ch, blocksplit_flag, i, j, k, n, bits_pos; | ||
1216 | GranuleDef *g; | ||
1217 | int16_t exponents[576]; //FIXME try INTFLOAT | ||
1218 | int ret; | ||
1219 | |||
1220 | /* read side info */ | ||
1221 |
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|
2814 | if (s->lsf) { |
1222 |
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3 | ret = handle_crc(s, ((s->nb_channels == 1) ? 8*9 : 8*17)); |
1223 | 3 | main_data_begin = get_bits(&s->gb, 8); | |
1224 | 3 | skip_bits(&s->gb, s->nb_channels); | |
1225 | 3 | nb_granules = 1; | |
1226 | } else { | ||
1227 |
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|
2811 | ret = handle_crc(s, ((s->nb_channels == 1) ? 8*17 : 8*32)); |
1228 | 2811 | main_data_begin = get_bits(&s->gb, 9); | |
1229 |
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|
2811 | if (s->nb_channels == 2) |
1230 | 1260 | skip_bits(&s->gb, 3); | |
1231 | else | ||
1232 | 1551 | skip_bits(&s->gb, 5); | |
1233 | 2811 | nb_granules = 2; | |
1234 |
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6882 | for (ch = 0; ch < s->nb_channels; ch++) { |
1235 | 4071 | s->granules[ch][0].scfsi = 0;/* all scale factors are transmitted */ | |
1236 | 4071 | s->granules[ch][1].scfsi = get_bits(&s->gb, 4); | |
1237 | } | ||
1238 | } | ||
1239 |
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2814 | if (ret < 0) |
1240 | ✗ | return ret; | |
1241 | |||
1242 |
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8439 | for (gr = 0; gr < nb_granules; gr++) { |
1243 |
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|
13771 | for (ch = 0; ch < s->nb_channels; ch++) { |
1244 | ff_dlog(s->avctx, "gr=%d ch=%d: side_info\n", gr, ch); | ||
1245 | 8146 | g = &s->granules[ch][gr]; | |
1246 | 8146 | g->part2_3_length = get_bits(&s->gb, 12); | |
1247 | 8146 | g->big_values = get_bits(&s->gb, 9); | |
1248 |
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|
8146 | if (g->big_values > 288) { |
1249 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "big_values too big\n"); | |
1250 | ✗ | return AVERROR_INVALIDDATA; | |
1251 | } | ||
1252 | |||
1253 | 8146 | g->global_gain = get_bits(&s->gb, 8); | |
1254 | /* if MS stereo only is selected, we precompute the | ||
1255 | 1/sqrt(2) renormalization factor */ | ||
1256 |
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|
8146 | if ((s->mode_ext & (MODE_EXT_MS_STEREO | MODE_EXT_I_STEREO)) == |
1257 | MODE_EXT_MS_STEREO) | ||
1258 | 4468 | g->global_gain -= 2; | |
1259 |
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|
8146 | if (s->lsf) |
1260 | 4 | g->scalefac_compress = get_bits(&s->gb, 9); | |
1261 | else | ||
1262 | 8142 | g->scalefac_compress = get_bits(&s->gb, 4); | |
1263 | 8146 | blocksplit_flag = get_bits1(&s->gb); | |
1264 |
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|
8146 | if (blocksplit_flag) { |
1265 | 861 | g->block_type = get_bits(&s->gb, 2); | |
1266 |
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|
861 | if (g->block_type == 0) { |
1267 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "invalid block type\n"); | |
1268 | ✗ | return AVERROR_INVALIDDATA; | |
1269 | } | ||
1270 | 861 | g->switch_point = get_bits1(&s->gb); | |
1271 |
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2583 | for (i = 0; i < 2; i++) |
1272 | 1722 | g->table_select[i] = get_bits(&s->gb, 5); | |
1273 |
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3444 | for (i = 0; i < 3; i++) |
1274 | 2583 | g->subblock_gain[i] = get_bits(&s->gb, 3); | |
1275 | 861 | init_short_region(s, g); | |
1276 | } else { | ||
1277 | int region_address1, region_address2; | ||
1278 | 7285 | g->block_type = 0; | |
1279 | 7285 | g->switch_point = 0; | |
1280 |
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29140 | for (i = 0; i < 3; i++) |
1281 | 21855 | g->table_select[i] = get_bits(&s->gb, 5); | |
1282 | /* compute huffman coded region sizes */ | ||
1283 | 7285 | region_address1 = get_bits(&s->gb, 4); | |
1284 | 7285 | region_address2 = get_bits(&s->gb, 3); | |
1285 | ff_dlog(s->avctx, "region1=%d region2=%d\n", | ||
1286 | region_address1, region_address2); | ||
1287 | 7285 | init_long_region(s, g, region_address1, region_address2); | |
1288 | } | ||
1289 | 8146 | region_offset2size(g); | |
1290 | 8146 | compute_band_indexes(s, g); | |
1291 | |||
1292 | 8146 | g->preflag = 0; | |
1293 |
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|
8146 | if (!s->lsf) |
1294 | 8142 | g->preflag = get_bits1(&s->gb); | |
1295 | 8146 | g->scalefac_scale = get_bits1(&s->gb); | |
1296 | 8146 | g->count1table_select = get_bits1(&s->gb); | |
1297 | ff_dlog(s->avctx, "block_type=%d switch_point=%d\n", | ||
1298 | g->block_type, g->switch_point); | ||
1299 | } | ||
1300 | } | ||
1301 | |||
1302 |
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2814 | if (!s->adu_mode) { |
1303 | int skip; | ||
1304 | 2814 | const uint8_t *ptr = s->gb.buffer + (get_bits_count(&s->gb) >> 3); | |
1305 | 2814 | s->extrasize = av_clip((get_bits_left(&s->gb) >> 3) - s->extrasize, 0, | |
1306 | 2814 | FFMAX(0, LAST_BUF_SIZE - s->last_buf_size)); | |
1307 | av_assert1((get_bits_count(&s->gb) & 7) == 0); | ||
1308 | /* now we get bits from the main_data_begin offset */ | ||
1309 | ff_dlog(s->avctx, "seekback:%d, lastbuf:%d\n", | ||
1310 | main_data_begin, s->last_buf_size); | ||
1311 | |||
1312 | 2814 | memcpy(s->last_buf + s->last_buf_size, ptr, s->extrasize); | |
1313 | 2814 | s->in_gb = s->gb; | |
1314 | 2814 | init_get_bits(&s->gb, s->last_buf, (s->last_buf_size + s->extrasize) * 8); | |
1315 | 2814 | s->last_buf_size <<= 3; | |
1316 |
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2822 | for (gr = 0; gr < nb_granules && (s->last_buf_size >> 3) < main_data_begin; gr++) { |
1317 |
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16 | for (ch = 0; ch < s->nb_channels; ch++) { |
1318 | 8 | g = &s->granules[ch][gr]; | |
1319 | 8 | s->last_buf_size += g->part2_3_length; | |
1320 | 8 | memset(g->sb_hybrid, 0, sizeof(g->sb_hybrid)); | |
1321 | 8 | compute_imdct(s, g, &s->sb_samples[ch][18 * gr][0], s->mdct_buf[ch]); | |
1322 | } | ||
1323 | } | ||
1324 | 2814 | skip = s->last_buf_size - 8 * main_data_begin; | |
1325 |
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2814 | if (skip >= s->gb.size_in_bits - s->extrasize * 8 && s->in_gb.buffer) { |
1326 | 156 | skip_bits_long(&s->in_gb, skip - s->gb.size_in_bits + s->extrasize * 8); | |
1327 | 156 | s->gb = s->in_gb; | |
1328 | 156 | s->in_gb.buffer = NULL; | |
1329 | 156 | s->extrasize = 0; | |
1330 | } else { | ||
1331 | 2658 | skip_bits_long(&s->gb, skip); | |
1332 | } | ||
1333 | } else { | ||
1334 | ✗ | gr = 0; | |
1335 | ✗ | s->extrasize = 0; | |
1336 | } | ||
1337 | |||
1338 |
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8431 | for (; gr < nb_granules; gr++) { |
1339 |
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13755 | for (ch = 0; ch < s->nb_channels; ch++) { |
1340 | 8138 | g = &s->granules[ch][gr]; | |
1341 | 8138 | bits_pos = get_bits_count(&s->gb); | |
1342 | |||
1343 |
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8138 | if (!s->lsf) { |
1344 | uint8_t *sc; | ||
1345 | int slen, slen1, slen2; | ||
1346 | |||
1347 | /* MPEG-1 scale factors */ | ||
1348 | 8134 | slen1 = ff_slen_table[0][g->scalefac_compress]; | |
1349 | 8134 | slen2 = ff_slen_table[1][g->scalefac_compress]; | |
1350 | ff_dlog(s->avctx, "slen1=%d slen2=%d\n", slen1, slen2); | ||
1351 |
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8134 | if (g->block_type == 2) { |
1352 |
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|
311 | n = g->switch_point ? 17 : 18; |
1353 | 311 | j = 0; | |
1354 |
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311 | if (slen1) { |
1355 |
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851 | for (i = 0; i < n; i++) |
1356 | 806 | g->scale_factors[j++] = get_bits(&s->gb, slen1); | |
1357 | } else { | ||
1358 |
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5045 | for (i = 0; i < n; i++) |
1359 | 4779 | g->scale_factors[j++] = 0; | |
1360 | } | ||
1361 |
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|
311 | if (slen2) { |
1362 |
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4921 | for (i = 0; i < 18; i++) |
1363 | 4662 | g->scale_factors[j++] = get_bits(&s->gb, slen2); | |
1364 |
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1036 | for (i = 0; i < 3; i++) |
1365 | 777 | g->scale_factors[j++] = 0; | |
1366 | } else { | ||
1367 |
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1144 | for (i = 0; i < 21; i++) |
1368 | 1092 | g->scale_factors[j++] = 0; | |
1369 | } | ||
1370 | } else { | ||
1371 | 7823 | sc = s->granules[ch][0].scale_factors; | |
1372 | 7823 | j = 0; | |
1373 |
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39115 | for (k = 0; k < 4; k++) { |
1374 |
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|
31292 | n = k == 0 ? 6 : 5; |
1375 |
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|
31292 | if ((g->scfsi & (0x8 >> k)) == 0) { |
1376 |
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|
26922 | slen = (k < 2) ? slen1 : slen2; |
1377 |
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26922 | if (slen) { |
1378 |
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88978 | for (i = 0; i < n; i++) |
1379 | 74592 | g->scale_factors[j++] = get_bits(&s->gb, slen); | |
1380 | } else { | ||
1381 |
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78962 | for (i = 0; i < n; i++) |
1382 | 66426 | g->scale_factors[j++] = 0; | |
1383 | } | ||
1384 | } else { | ||
1385 | /* simply copy from last granule */ | ||
1386 |
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27635 | for (i = 0; i < n; i++) { |
1387 | 23265 | g->scale_factors[j] = sc[j]; | |
1388 | 23265 | j++; | |
1389 | } | ||
1390 | } | ||
1391 | } | ||
1392 | 7823 | g->scale_factors[j++] = 0; | |
1393 | } | ||
1394 | } else { | ||
1395 | int tindex, tindex2, slen[4], sl, sf; | ||
1396 | |||
1397 | /* LSF scale factors */ | ||
1398 |
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4 | if (g->block_type == 2) |
1399 | ✗ | tindex = g->switch_point ? 2 : 1; | |
1400 | else | ||
1401 | 4 | tindex = 0; | |
1402 | |||
1403 | 4 | sf = g->scalefac_compress; | |
1404 |
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4 | if ((s->mode_ext & MODE_EXT_I_STEREO) && ch == 1) { |
1405 | /* intensity stereo case */ | ||
1406 | 1 | sf >>= 1; | |
1407 |
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|
1 | if (sf < 180) { |
1408 | 1 | lsf_sf_expand(slen, sf, 6, 6, 0); | |
1409 | 1 | tindex2 = 3; | |
1410 | ✗ | } else if (sf < 244) { | |
1411 | ✗ | lsf_sf_expand(slen, sf - 180, 4, 4, 0); | |
1412 | ✗ | tindex2 = 4; | |
1413 | } else { | ||
1414 | ✗ | lsf_sf_expand(slen, sf - 244, 3, 0, 0); | |
1415 | ✗ | tindex2 = 5; | |
1416 | } | ||
1417 | } else { | ||
1418 | /* normal case */ | ||
1419 |
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3 | if (sf < 400) { |
1420 | 1 | lsf_sf_expand(slen, sf, 5, 4, 4); | |
1421 | 1 | tindex2 = 0; | |
1422 |
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|
2 | } else if (sf < 500) { |
1423 | 2 | lsf_sf_expand(slen, sf - 400, 5, 4, 0); | |
1424 | 2 | tindex2 = 1; | |
1425 | } else { | ||
1426 | ✗ | lsf_sf_expand(slen, sf - 500, 3, 0, 0); | |
1427 | ✗ | tindex2 = 2; | |
1428 | ✗ | g->preflag = 1; | |
1429 | } | ||
1430 | } | ||
1431 | |||
1432 | 4 | j = 0; | |
1433 |
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20 | for (k = 0; k < 4; k++) { |
1434 | 16 | n = ff_lsf_nsf_table[tindex2][tindex][k]; | |
1435 | 16 | sl = slen[k]; | |
1436 |
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16 | if (sl) { |
1437 |
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45 | for (i = 0; i < n; i++) |
1438 | 39 | g->scale_factors[j++] = get_bits(&s->gb, sl); | |
1439 | } else { | ||
1440 |
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|
55 | for (i = 0; i < n; i++) |
1441 | 45 | g->scale_factors[j++] = 0; | |
1442 | } | ||
1443 | } | ||
1444 | /* XXX: should compute exact size */ | ||
1445 |
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80 | for (; j < 40; j++) |
1446 | 76 | g->scale_factors[j] = 0; | |
1447 | } | ||
1448 | |||
1449 | 8138 | exponents_from_scale_factors(s, g, exponents); | |
1450 | |||
1451 | /* read Huffman coded residue */ | ||
1452 | 8138 | huffman_decode(s, g, exponents, bits_pos + g->part2_3_length); | |
1453 | } /* ch */ | ||
1454 | |||
1455 |
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5617 | if (s->mode == MPA_JSTEREO) |
1456 | 2455 | compute_stereo(s, &s->granules[0][gr], &s->granules[1][gr]); | |
1457 | |||
1458 |
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13755 | for (ch = 0; ch < s->nb_channels; ch++) { |
1459 | 8138 | g = &s->granules[ch][gr]; | |
1460 | |||
1461 | 8138 | reorder_block(s, g); | |
1462 | 8138 | compute_antialias(s, g); | |
1463 | 8138 | compute_imdct(s, g, &s->sb_samples[ch][18 * gr][0], s->mdct_buf[ch]); | |
1464 | } | ||
1465 | } /* gr */ | ||
1466 |
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|
2814 | if (get_bits_count(&s->gb) < 0) |
1467 | ✗ | skip_bits_long(&s->gb, -get_bits_count(&s->gb)); | |
1468 | 2814 | return nb_granules * 18; | |
1469 | } | ||
1470 | |||
1471 | 10150 | static int mp_decode_frame(MPADecodeContext *s, OUT_INT **samples, | |
1472 | const uint8_t *buf, int buf_size) | ||
1473 | { | ||
1474 | int i, nb_frames, ch, ret; | ||
1475 | OUT_INT *samples_ptr; | ||
1476 | |||
1477 | 10150 | init_get_bits(&s->gb, buf + HEADER_SIZE, (buf_size - HEADER_SIZE) * 8); | |
1478 |
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10150 | if (s->error_protection) |
1479 | 206 | s->crc = get_bits(&s->gb, 16); | |
1480 | |||
1481 |
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10150 | switch(s->layer) { |
1482 | ✗ | case 1: | |
1483 | ✗ | s->avctx->frame_size = 384; | |
1484 | ✗ | nb_frames = mp_decode_layer1(s); | |
1485 | ✗ | break; | |
1486 | 7336 | case 2: | |
1487 | 7336 | s->avctx->frame_size = 1152; | |
1488 | 7336 | nb_frames = mp_decode_layer2(s); | |
1489 | 7336 | break; | |
1490 | 2814 | case 3: | |
1491 |
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|
2814 | s->avctx->frame_size = s->lsf ? 576 : 1152; |
1492 | 2814 | default: | |
1493 | 2814 | nb_frames = mp_decode_layer3(s); | |
1494 | |||
1495 | 2814 | s->last_buf_size=0; | |
1496 |
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2814 | if (s->in_gb.buffer) { |
1497 | 1719 | align_get_bits(&s->gb); | |
1498 | 1719 | i = (get_bits_left(&s->gb) >> 3) - s->extrasize; | |
1499 |
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1719 | if (i >= 0 && i <= BACKSTEP_SIZE) { |
1500 | 1719 | memmove(s->last_buf, s->gb.buffer + (get_bits_count(&s->gb) >> 3), i); | |
1501 | 1719 | s->last_buf_size=i; | |
1502 | } else | ||
1503 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "invalid old backstep %d\n", i); | |
1504 | 1719 | s->gb = s->in_gb; | |
1505 | 1719 | s->in_gb.buffer = NULL; | |
1506 | 1719 | s->extrasize = 0; | |
1507 | } | ||
1508 | |||
1509 | 2814 | align_get_bits(&s->gb); | |
1510 | av_assert1((get_bits_count(&s->gb) & 7) == 0); | ||
1511 | 2814 | i = (get_bits_left(&s->gb) >> 3) - s->extrasize; | |
1512 |
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2814 | if (i < 0 || i > BACKSTEP_SIZE || nb_frames < 0) { |
1513 |
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230 | if (i < 0) |
1514 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "invalid new backstep %d\n", i); | |
1515 | 230 | i = FFMIN(BACKSTEP_SIZE, buf_size - HEADER_SIZE); | |
1516 | } | ||
1517 | av_assert1(i <= buf_size - HEADER_SIZE && i >= 0); | ||
1518 | 2814 | memcpy(s->last_buf + s->last_buf_size, s->gb.buffer + buf_size - HEADER_SIZE - i, i); | |
1519 | 2814 | s->last_buf_size += i; | |
1520 | } | ||
1521 | |||
1522 |
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10150 | if(nb_frames < 0) |
1523 | ✗ | return nb_frames; | |
1524 | |||
1525 | /* get output buffer */ | ||
1526 |
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10150 | if (!samples) { |
1527 |
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10150 | av_assert0(s->frame); |
1528 | 10150 | s->frame->nb_samples = s->avctx->frame_size; | |
1529 |
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10150 | if ((ret = ff_get_buffer(s->avctx, s->frame, 0)) < 0) |
1530 | ✗ | return ret; | |
1531 | 10150 | samples = (OUT_INT **)s->frame->extended_data; | |
1532 | } | ||
1533 | |||
1534 | /* apply the synthesis filter */ | ||
1535 |
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22300 | for (ch = 0; ch < s->nb_channels; ch++) { |
1536 | int sample_stride; | ||
1537 |
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12150 | if (s->avctx->sample_fmt == OUT_FMT_P) { |
1538 | 12150 | samples_ptr = samples[ch]; | |
1539 | 12150 | sample_stride = 1; | |
1540 | } else { | ||
1541 | ✗ | samples_ptr = samples[0] + ch; | |
1542 | ✗ | sample_stride = s->nb_channels; | |
1543 | } | ||
1544 |
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449478 | for (i = 0; i < nb_frames; i++) { |
1545 | 437328 | RENAME(ff_mpa_synth_filter)(&s->mpadsp, s->synth_buf[ch], | |
1546 | &(s->synth_buf_offset[ch]), | ||
1547 | RENAME(ff_mpa_synth_window), | ||
1548 | &s->dither_state, samples_ptr, | ||
1549 | 437328 | sample_stride, s->sb_samples[ch][i]); | |
1550 | 437328 | samples_ptr += 32 * sample_stride; | |
1551 | } | ||
1552 | } | ||
1553 | |||
1554 | 10150 | return nb_frames * 32 * sizeof(OUT_INT) * s->nb_channels; | |
1555 | } | ||
1556 | |||
1557 | 10153 | static int decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
1558 | int *got_frame_ptr, AVPacket *avpkt) | ||
1559 | { | ||
1560 | 10153 | const uint8_t *buf = avpkt->data; | |
1561 | 10153 | int buf_size = avpkt->size; | |
1562 | 10153 | MPADecodeContext *s = avctx->priv_data; | |
1563 | uint32_t header; | ||
1564 | int ret; | ||
1565 | |||
1566 | 10153 | int skipped = 0; | |
1567 |
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10153 | while(buf_size && !*buf){ |
1568 | ✗ | buf++; | |
1569 | ✗ | buf_size--; | |
1570 | ✗ | skipped++; | |
1571 | } | ||
1572 | |||
1573 |
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10153 | if (buf_size < HEADER_SIZE) |
1574 | ✗ | return AVERROR_INVALIDDATA; | |
1575 | |||
1576 | 10153 | header = AV_RB32(buf); | |
1577 |
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10153 | if (header >> 8 == AV_RB32("TAG") >> 8) { |
1578 | ✗ | av_log(avctx, AV_LOG_DEBUG, "discarding ID3 tag\n"); | |
1579 | ✗ | return buf_size + skipped; | |
1580 | } | ||
1581 | 10153 | ret = avpriv_mpegaudio_decode_header((MPADecodeHeader *)s, header); | |
1582 |
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10153 | if (ret < 0) { |
1583 | 3 | av_log(avctx, AV_LOG_ERROR, "Header missing\n"); | |
1584 | 3 | return AVERROR_INVALIDDATA; | |
1585 |
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10150 | } else if (ret == 1) { |
1586 | /* free format: prepare to compute frame size */ | ||
1587 | ✗ | s->frame_size = -1; | |
1588 | ✗ | return AVERROR_INVALIDDATA; | |
1589 | } | ||
1590 | /* update codec info */ | ||
1591 | 10150 | av_channel_layout_uninit(&avctx->ch_layout); | |
1592 |
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|
10150 | avctx->ch_layout = s->nb_channels == 1 ? (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO : |
1593 | (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; | ||
1594 |
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10150 | if (!avctx->bit_rate) |
1595 | 6 | avctx->bit_rate = s->bit_rate; | |
1596 | |||
1597 |
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10150 | if (s->frame_size <= 0) { |
1598 | ✗ | av_log(avctx, AV_LOG_ERROR, "incomplete frame\n"); | |
1599 | ✗ | return AVERROR_INVALIDDATA; | |
1600 |
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10150 | } else if (s->frame_size < buf_size) { |
1601 | 1 | av_log(avctx, AV_LOG_DEBUG, "incorrect frame size - multiple frames in buffer?\n"); | |
1602 | 1 | buf_size= s->frame_size; | |
1603 | } | ||
1604 | |||
1605 | 10150 | s->frame = frame; | |
1606 | |||
1607 | 10150 | ret = mp_decode_frame(s, NULL, buf, buf_size); | |
1608 |
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10150 | if (ret >= 0) { |
1609 | 10150 | s->frame->nb_samples = avctx->frame_size; | |
1610 | 10150 | *got_frame_ptr = 1; | |
1611 |
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10150 | if (avctx->codec_id != AV_CODEC_ID_AHX) |
1612 | 10150 | avctx->sample_rate = s->sample_rate; | |
1613 | //FIXME maybe move the other codec info stuff from above here too | ||
1614 | } else { | ||
1615 | ✗ | av_log(avctx, AV_LOG_ERROR, "Error while decoding MPEG audio frame.\n"); | |
1616 | /* Only return an error if the bad frame makes up the whole packet or | ||
1617 | * the error is related to buffer management. | ||
1618 | * If there is more data in the packet, just consume the bad frame | ||
1619 | * instead of returning an error, which would discard the whole | ||
1620 | * packet. */ | ||
1621 | ✗ | *got_frame_ptr = 0; | |
1622 | ✗ | if (buf_size == avpkt->size || ret != AVERROR_INVALIDDATA) | |
1623 | ✗ | return ret; | |
1624 | } | ||
1625 | 10150 | s->frame_size = 0; | |
1626 | 10150 | return buf_size + skipped; | |
1627 | } | ||
1628 | |||
1629 | 1 | static av_cold void mp_flush(MPADecodeContext *ctx) | |
1630 | { | ||
1631 | 1 | memset(ctx->synth_buf, 0, sizeof(ctx->synth_buf)); | |
1632 | 1 | memset(ctx->mdct_buf, 0, sizeof(ctx->mdct_buf)); | |
1633 | 1 | ctx->last_buf_size = 0; | |
1634 | 1 | ctx->dither_state = 0; | |
1635 | 1 | } | |
1636 | |||
1637 | 1 | static av_cold void flush(AVCodecContext *avctx) | |
1638 | { | ||
1639 | 1 | mp_flush(avctx->priv_data); | |
1640 | 1 | } | |
1641 | |||
1642 | #if CONFIG_MP3ADU_DECODER || CONFIG_MP3ADUFLOAT_DECODER | ||
1643 | ✗ | static int decode_frame_adu(AVCodecContext *avctx, AVFrame *frame, | |
1644 | int *got_frame_ptr, AVPacket *avpkt) | ||
1645 | { | ||
1646 | ✗ | const uint8_t *buf = avpkt->data; | |
1647 | ✗ | int buf_size = avpkt->size; | |
1648 | ✗ | MPADecodeContext *s = avctx->priv_data; | |
1649 | uint32_t header; | ||
1650 | int len, ret; | ||
1651 | |||
1652 | ✗ | len = buf_size; | |
1653 | |||
1654 | // Discard too short frames | ||
1655 | ✗ | if (buf_size < HEADER_SIZE) { | |
1656 | ✗ | av_log(avctx, AV_LOG_ERROR, "Packet is too small\n"); | |
1657 | ✗ | return AVERROR_INVALIDDATA; | |
1658 | } | ||
1659 | |||
1660 | |||
1661 | ✗ | if (len > MPA_MAX_CODED_FRAME_SIZE) | |
1662 | ✗ | len = MPA_MAX_CODED_FRAME_SIZE; | |
1663 | |||
1664 | // Get header and restore sync word | ||
1665 | ✗ | header = AV_RB32(buf) | 0xffe00000; | |
1666 | |||
1667 | ✗ | ret = avpriv_mpegaudio_decode_header((MPADecodeHeader *)s, header); | |
1668 | ✗ | if (ret < 0) { | |
1669 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid frame header\n"); | |
1670 | ✗ | return ret; | |
1671 | } | ||
1672 | /* update codec info */ | ||
1673 | ✗ | avctx->sample_rate = s->sample_rate; | |
1674 | ✗ | av_channel_layout_uninit(&avctx->ch_layout); | |
1675 | ✗ | avctx->ch_layout = s->nb_channels == 1 ? (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO : | |
1676 | (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; | ||
1677 | ✗ | if (!avctx->bit_rate) | |
1678 | ✗ | avctx->bit_rate = s->bit_rate; | |
1679 | |||
1680 | ✗ | s->frame_size = len; | |
1681 | |||
1682 | ✗ | s->frame = frame; | |
1683 | |||
1684 | ✗ | ret = mp_decode_frame(s, NULL, buf, buf_size); | |
1685 | ✗ | if (ret < 0) { | |
1686 | ✗ | av_log(avctx, AV_LOG_ERROR, "Error while decoding MPEG audio frame.\n"); | |
1687 | ✗ | return ret; | |
1688 | } | ||
1689 | |||
1690 | ✗ | *got_frame_ptr = 1; | |
1691 | |||
1692 | ✗ | return buf_size; | |
1693 | } | ||
1694 | #endif /* CONFIG_MP3ADU_DECODER || CONFIG_MP3ADUFLOAT_DECODER */ | ||
1695 | |||
1696 | #if CONFIG_MP3ON4_DECODER || CONFIG_MP3ON4FLOAT_DECODER | ||
1697 | |||
1698 | /** | ||
1699 | * Context for MP3On4 decoder | ||
1700 | */ | ||
1701 | typedef struct MP3On4DecodeContext { | ||
1702 | int frames; ///< number of mp3 frames per block (number of mp3 decoder instances) | ||
1703 | int syncword; ///< syncword patch | ||
1704 | const uint8_t *coff; ///< channel offsets in output buffer | ||
1705 | MPADecodeContext *mp3decctx[5]; ///< MPADecodeContext for every decoder instance | ||
1706 | } MP3On4DecodeContext; | ||
1707 | |||
1708 | #include "mpeg4audio.h" | ||
1709 | |||
1710 | /* Next 3 arrays are indexed by channel config number (passed via codecdata) */ | ||
1711 | |||
1712 | /* number of mp3 decoder instances */ | ||
1713 | static const uint8_t mp3Frames[8] = { 0, 1, 1, 2, 3, 3, 4, 5 }; | ||
1714 | |||
1715 | /* offsets into output buffer, assume output order is FL FR C LFE BL BR SL SR */ | ||
1716 | static const uint8_t chan_offset[8][5] = { | ||
1717 | { 0 }, | ||
1718 | { 0 }, // C | ||
1719 | { 0 }, // FLR | ||
1720 | { 2, 0 }, // C FLR | ||
1721 | { 2, 0, 3 }, // C FLR BS | ||
1722 | { 2, 0, 3 }, // C FLR BLRS | ||
1723 | { 2, 0, 4, 3 }, // C FLR BLRS LFE | ||
1724 | { 2, 0, 6, 4, 3 }, // C FLR BLRS BLR LFE | ||
1725 | }; | ||
1726 | |||
1727 | /* mp3on4 channel layouts */ | ||
1728 | static const int16_t chan_layout[8] = { | ||
1729 | 0, | ||
1730 | AV_CH_LAYOUT_MONO, | ||
1731 | AV_CH_LAYOUT_STEREO, | ||
1732 | AV_CH_LAYOUT_SURROUND, | ||
1733 | AV_CH_LAYOUT_4POINT0, | ||
1734 | AV_CH_LAYOUT_5POINT0, | ||
1735 | AV_CH_LAYOUT_5POINT1, | ||
1736 | AV_CH_LAYOUT_7POINT1 | ||
1737 | }; | ||
1738 | |||
1739 | ✗ | static av_cold int decode_close_mp3on4(AVCodecContext * avctx) | |
1740 | { | ||
1741 | ✗ | MP3On4DecodeContext *s = avctx->priv_data; | |
1742 | |||
1743 | ✗ | av_freep(&s->mp3decctx[0]); | |
1744 | |||
1745 | ✗ | return 0; | |
1746 | } | ||
1747 | |||
1748 | |||
1749 | ✗ | static av_cold int decode_init_mp3on4(AVCodecContext * avctx) | |
1750 | { | ||
1751 | ✗ | MP3On4DecodeContext *s = avctx->priv_data; | |
1752 | MPEG4AudioConfig cfg; | ||
1753 | int i, ret; | ||
1754 | |||
1755 | ✗ | if ((avctx->extradata_size < 2) || !avctx->extradata) { | |
1756 | ✗ | av_log(avctx, AV_LOG_ERROR, "Codec extradata missing or too short.\n"); | |
1757 | ✗ | return AVERROR_INVALIDDATA; | |
1758 | } | ||
1759 | |||
1760 | ✗ | avpriv_mpeg4audio_get_config2(&cfg, avctx->extradata, | |
1761 | avctx->extradata_size, 1, avctx); | ||
1762 | ✗ | if (!cfg.chan_config || cfg.chan_config > 7) { | |
1763 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid channel config number.\n"); | |
1764 | ✗ | return AVERROR_INVALIDDATA; | |
1765 | } | ||
1766 | ✗ | s->frames = mp3Frames[cfg.chan_config]; | |
1767 | ✗ | s->coff = chan_offset[cfg.chan_config]; | |
1768 | ✗ | av_channel_layout_uninit(&avctx->ch_layout); | |
1769 | ✗ | av_channel_layout_from_mask(&avctx->ch_layout, chan_layout[cfg.chan_config]); | |
1770 | |||
1771 | ✗ | if (cfg.sample_rate < 16000) | |
1772 | ✗ | s->syncword = 0xffe00000; | |
1773 | else | ||
1774 | ✗ | s->syncword = 0xfff00000; | |
1775 | |||
1776 | /* Init the first mp3 decoder in standard way, so that all tables get built | ||
1777 | * Other decoders will be initialized here copying data from the first context | ||
1778 | */ | ||
1779 | // Allocate zeroed memory for the decoder contexts | ||
1780 | ✗ | s->mp3decctx[0] = av_calloc(s->frames, sizeof(*s->mp3decctx[0])); | |
1781 | ✗ | if (!s->mp3decctx[0]) | |
1782 | ✗ | return AVERROR(ENOMEM); | |
1783 | ✗ | ret = decode_ctx_init(avctx, s->mp3decctx[0]); | |
1784 | ✗ | if (ret < 0) | |
1785 | ✗ | return ret; | |
1786 | ✗ | s->mp3decctx[0]->adu_mode = 1; // Set adu mode | |
1787 | |||
1788 | /* Create a separate codec/context for each frame (first is already ok). | ||
1789 | * Each frame is 1 or 2 channels - up to 5 frames allowed | ||
1790 | */ | ||
1791 | ✗ | for (i = 1; i < s->frames; i++) { | |
1792 | ✗ | s->mp3decctx[i] = s->mp3decctx[0] + i; | |
1793 | ✗ | s->mp3decctx[i]->adu_mode = 1; | |
1794 | ✗ | s->mp3decctx[i]->avctx = avctx; | |
1795 | ✗ | s->mp3decctx[i]->mpadsp = s->mp3decctx[0]->mpadsp; | |
1796 | #if USE_FLOATS | ||
1797 | ✗ | s->mp3decctx[i]->butterflies_float = s->mp3decctx[0]->butterflies_float; | |
1798 | #endif | ||
1799 | } | ||
1800 | |||
1801 | ✗ | return 0; | |
1802 | } | ||
1803 | |||
1804 | |||
1805 | ✗ | static av_cold void flush_mp3on4(AVCodecContext *avctx) | |
1806 | { | ||
1807 | int i; | ||
1808 | ✗ | MP3On4DecodeContext *s = avctx->priv_data; | |
1809 | |||
1810 | ✗ | for (i = 0; i < s->frames; i++) | |
1811 | ✗ | mp_flush(s->mp3decctx[i]); | |
1812 | ✗ | } | |
1813 | |||
1814 | |||
1815 | ✗ | static int decode_frame_mp3on4(AVCodecContext *avctx, AVFrame *frame, | |
1816 | int *got_frame_ptr, AVPacket *avpkt) | ||
1817 | { | ||
1818 | ✗ | const uint8_t *buf = avpkt->data; | |
1819 | ✗ | int buf_size = avpkt->size; | |
1820 | ✗ | MP3On4DecodeContext *s = avctx->priv_data; | |
1821 | MPADecodeContext *m; | ||
1822 | ✗ | int fsize, len = buf_size, out_size = 0; | |
1823 | uint32_t header; | ||
1824 | OUT_INT **out_samples; | ||
1825 | OUT_INT *outptr[2]; | ||
1826 | int fr, ch, ret; | ||
1827 | |||
1828 | /* get output buffer */ | ||
1829 | ✗ | frame->nb_samples = MPA_FRAME_SIZE; | |
1830 | ✗ | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) | |
1831 | ✗ | return ret; | |
1832 | ✗ | out_samples = (OUT_INT **)frame->extended_data; | |
1833 | |||
1834 | // Discard too short frames | ||
1835 | ✗ | if (buf_size < HEADER_SIZE) | |
1836 | ✗ | return AVERROR_INVALIDDATA; | |
1837 | |||
1838 | ✗ | avctx->bit_rate = 0; | |
1839 | |||
1840 | ✗ | ch = 0; | |
1841 | ✗ | for (fr = 0; fr < s->frames; fr++) { | |
1842 | ✗ | fsize = AV_RB16(buf) >> 4; | |
1843 | ✗ | fsize = FFMIN3(fsize, len, MPA_MAX_CODED_FRAME_SIZE); | |
1844 | ✗ | m = s->mp3decctx[fr]; | |
1845 | av_assert1(m); | ||
1846 | |||
1847 | ✗ | if (fsize < HEADER_SIZE) { | |
1848 | ✗ | av_log(avctx, AV_LOG_ERROR, "Frame size smaller than header size\n"); | |
1849 | ✗ | return AVERROR_INVALIDDATA; | |
1850 | } | ||
1851 | ✗ | header = (AV_RB32(buf) & 0x000fffff) | s->syncword; // patch header | |
1852 | |||
1853 | ✗ | ret = avpriv_mpegaudio_decode_header((MPADecodeHeader *)m, header); | |
1854 | ✗ | if (ret < 0) { | |
1855 | ✗ | av_log(avctx, AV_LOG_ERROR, "Bad header, discard block\n"); | |
1856 | ✗ | return AVERROR_INVALIDDATA; | |
1857 | } | ||
1858 | |||
1859 | ✗ | if (ch + m->nb_channels > avctx->ch_layout.nb_channels || | |
1860 | ✗ | s->coff[fr] + m->nb_channels > avctx->ch_layout.nb_channels) { | |
1861 | ✗ | av_log(avctx, AV_LOG_ERROR, "frame channel count exceeds codec " | |
1862 | "channel count\n"); | ||
1863 | ✗ | return AVERROR_INVALIDDATA; | |
1864 | } | ||
1865 | ✗ | ch += m->nb_channels; | |
1866 | |||
1867 | ✗ | outptr[0] = out_samples[s->coff[fr]]; | |
1868 | ✗ | if (m->nb_channels > 1) | |
1869 | ✗ | outptr[1] = out_samples[s->coff[fr] + 1]; | |
1870 | |||
1871 | ✗ | if ((ret = mp_decode_frame(m, outptr, buf, fsize)) < 0) { | |
1872 | ✗ | av_log(avctx, AV_LOG_ERROR, "failed to decode channel %d\n", ch); | |
1873 | ✗ | memset(outptr[0], 0, MPA_FRAME_SIZE*sizeof(OUT_INT)); | |
1874 | ✗ | if (m->nb_channels > 1) | |
1875 | ✗ | memset(outptr[1], 0, MPA_FRAME_SIZE*sizeof(OUT_INT)); | |
1876 | ✗ | ret = m->nb_channels * MPA_FRAME_SIZE*sizeof(OUT_INT); | |
1877 | } | ||
1878 | |||
1879 | ✗ | out_size += ret; | |
1880 | ✗ | buf += fsize; | |
1881 | ✗ | len -= fsize; | |
1882 | |||
1883 | ✗ | avctx->bit_rate += m->bit_rate; | |
1884 | } | ||
1885 | ✗ | if (ch != avctx->ch_layout.nb_channels) { | |
1886 | ✗ | av_log(avctx, AV_LOG_ERROR, "failed to decode all channels\n"); | |
1887 | ✗ | return AVERROR_INVALIDDATA; | |
1888 | } | ||
1889 | |||
1890 | /* update codec info */ | ||
1891 | ✗ | avctx->sample_rate = s->mp3decctx[0]->sample_rate; | |
1892 | |||
1893 | ✗ | frame->nb_samples = out_size / (avctx->ch_layout.nb_channels * sizeof(OUT_INT)); | |
1894 | ✗ | *got_frame_ptr = 1; | |
1895 | |||
1896 | ✗ | return buf_size; | |
1897 | } | ||
1898 | #endif /* CONFIG_MP3ON4_DECODER || CONFIG_MP3ON4FLOAT_DECODER */ | ||
1899 |