vlc: Add header #include when the types are used
[libav.git] / libavcodec / mpc8.c
CommitLineData
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1/*
2 * Musepack SV8 decoder
3 * Copyright (c) 2007 Konstantin Shishkov
4 *
2912e87a 5 * This file is part of Libav.
12877faf 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
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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 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 18 * License along with Libav; if not, write to the Free Software
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19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
ba87f080 23 * @file
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24 * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
25 * divided into 32 subbands.
26 */
27
a903f8f0 28#include "libavutil/channel_layout.h"
74e2a078 29#include "libavutil/lfg.h"
6668bc80 30
12877faf 31#include "avcodec.h"
6668bc80 32#include "bitstream.h"
594d4d5d 33#include "internal.h"
c4f5c2d6 34#include "mpegaudiodsp.h"
73fc82f3 35#include "vlc.h"
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36
37#include "mpc.h"
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38#include "mpc8data.h"
39#include "mpc8huff.h"
40
41static VLC band_vlc, scfi_vlc[2], dscf_vlc[2], res_vlc[2];
42static VLC q1_vlc, q2_vlc[2], q3_vlc[2], quant_vlc[4][2], q9up_vlc;
43
44static const int q3_offsets[2] = { MPC8_Q3_OFFSET, MPC8_Q4_OFFSET };
45static const int quant_offsets[6] = { MPC8_Q5_OFFSET, MPC8_Q6_OFFSET, MPC8_Q7_OFFSET, MPC8_Q8_OFFSET };
46
6668bc80 47static inline int mpc8_dec_base(BitstreamContext *bc, int k, int n)
12877faf 48{
0d5390b0 49 int len = mpc8_cnk_len[k-1][n-1] - 1;
6668bc80 50 int code = len ? bitstream_read(bc, len) : 0;
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51
52 if (code >= mpc8_cnk_lost[k-1][n-1])
6668bc80 53 code = ((code << 1) | bitstream_read_bit(bc)) - mpc8_cnk_lost[k - 1][n - 1];
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54
55 return code;
56}
57
6668bc80 58static inline int mpc8_dec_enum(BitstreamContext *bc, int k, int n)
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59{
60 int bits = 0;
61 const uint32_t * C = mpc8_cnk[k-1];
6668bc80 62 int code = mpc8_dec_base(bc, k, n);
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63
64 do {
65 n--;
66 if (code >= C[n]) {
67 bits |= 1 << n;
68 code -= C[n];
69 C -= 32;
70 k--;
71 }
72 } while(k > 0);
73
74 return bits;
75}
76
6668bc80 77static inline int mpc8_get_mod_golomb(BitstreamContext *bc, int m)
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78{
79 if(mpc8_cnk_len[0][m] < 1) return 0;
6668bc80 80 return mpc8_dec_base(bc, 1, m + 1);
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81}
82
6668bc80 83static int mpc8_get_mask(BitstreamContext *bc, int size, int t)
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84{
85 int mask = 0;
86
87 if(t && t != size)
6668bc80 88 mask = mpc8_dec_enum(bc, FFMIN(t, size - t), size);
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89 if((t << 1) > size) mask = ~mask;
90
91 return mask;
92}
93
40039717 94static const uint16_t vlc_offsets[13] = {
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95 0, 640, 1184, 1748, 2298, 2426, 2554, 3066, 3578, 4106, 4618, 5196, 5708
96};
97
98a6fff9 98static av_cold int mpc8_decode_init(AVCodecContext * avctx)
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99{
100 int i;
101 MPCContext *c = avctx->priv_data;
6668bc80 102 BitstreamContext bc;
5e534865 103 static int vlc_initialized = 0;
7d3829a8 104 int channels;
12877faf 105
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106 static VLC_TYPE band_table[542][2];
107 static VLC_TYPE q1_table[520][2];
108 static VLC_TYPE q9up_table[524][2];
109 static VLC_TYPE scfi0_table[1 << MPC8_SCFI0_BITS][2];
110 static VLC_TYPE scfi1_table[1 << MPC8_SCFI1_BITS][2];
111 static VLC_TYPE dscf0_table[560][2];
112 static VLC_TYPE dscf1_table[598][2];
113 static VLC_TYPE q3_0_table[512][2];
114 static VLC_TYPE q3_1_table[516][2];
115 static VLC_TYPE codes_table[5708][2];
116
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117 if(avctx->extradata_size < 2){
118 av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
119 return -1;
120 }
121 memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
74e2a078 122 av_lfg_init(&c->rnd, 0xDEADBEEF);
c4f5c2d6 123 ff_mpadsp_init(&c->mpadsp);
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124
125 ff_mpc_init();
126
6668bc80 127 bitstream_init(&bc, avctx->extradata, 16);
12877faf 128
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AH
129 bitstream_skip(&bc, 3); // sample rate
130 c->maxbands = bitstream_read(&bc, 5) + 1;
131 channels = bitstream_read(&bc, 4) + 1;
7d3829a8 132 if (channels > 2) {
12e25ed2 133 avpriv_request_sample(avctx, "Multichannel MPC SV8");
717addec 134 return AVERROR_PATCHWELCOME;
7d3829a8 135 }
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AH
136 c->MSS = bitstream_read_bit(&bc);
137 c->frames = 1 << (bitstream_read(&bc, 3) * 2);
12877faf 138
1a345903 139 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
c2fcd0a7 140 avctx->channel_layout = (avctx->channels==2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
76c4a644 141
5e534865 142 if(vlc_initialized) return 0;
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143 av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
144
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145 band_vlc.table = band_table;
146 band_vlc.table_allocated = 542;
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147 init_vlc(&band_vlc, MPC8_BANDS_BITS, MPC8_BANDS_SIZE,
148 mpc8_bands_bits, 1, 1,
bd4110f9 149 mpc8_bands_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
12877faf 150
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151 q1_vlc.table = q1_table;
152 q1_vlc.table_allocated = 520;
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153 init_vlc(&q1_vlc, MPC8_Q1_BITS, MPC8_Q1_SIZE,
154 mpc8_q1_bits, 1, 1,
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155 mpc8_q1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
156 q9up_vlc.table = q9up_table;
157 q9up_vlc.table_allocated = 524;
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158 init_vlc(&q9up_vlc, MPC8_Q9UP_BITS, MPC8_Q9UP_SIZE,
159 mpc8_q9up_bits, 1, 1,
bd4110f9 160 mpc8_q9up_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
12877faf 161
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162 scfi_vlc[0].table = scfi0_table;
163 scfi_vlc[0].table_allocated = 1 << MPC8_SCFI0_BITS;
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164 init_vlc(&scfi_vlc[0], MPC8_SCFI0_BITS, MPC8_SCFI0_SIZE,
165 mpc8_scfi0_bits, 1, 1,
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166 mpc8_scfi0_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
167 scfi_vlc[1].table = scfi1_table;
168 scfi_vlc[1].table_allocated = 1 << MPC8_SCFI1_BITS;
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169 init_vlc(&scfi_vlc[1], MPC8_SCFI1_BITS, MPC8_SCFI1_SIZE,
170 mpc8_scfi1_bits, 1, 1,
bd4110f9 171 mpc8_scfi1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
12877faf 172
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173 dscf_vlc[0].table = dscf0_table;
174 dscf_vlc[0].table_allocated = 560;
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175 init_vlc(&dscf_vlc[0], MPC8_DSCF0_BITS, MPC8_DSCF0_SIZE,
176 mpc8_dscf0_bits, 1, 1,
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177 mpc8_dscf0_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
178 dscf_vlc[1].table = dscf1_table;
179 dscf_vlc[1].table_allocated = 598;
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180 init_vlc(&dscf_vlc[1], MPC8_DSCF1_BITS, MPC8_DSCF1_SIZE,
181 mpc8_dscf1_bits, 1, 1,
bd4110f9 182 mpc8_dscf1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
12877faf 183
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184 q3_vlc[0].table = q3_0_table;
185 q3_vlc[0].table_allocated = 512;
e96b4a53 186 ff_init_vlc_sparse(&q3_vlc[0], MPC8_Q3_BITS, MPC8_Q3_SIZE,
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187 mpc8_q3_bits, 1, 1,
188 mpc8_q3_codes, 1, 1,
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189 mpc8_q3_syms, 1, 1, INIT_VLC_USE_NEW_STATIC);
190 q3_vlc[1].table = q3_1_table;
191 q3_vlc[1].table_allocated = 516;
e96b4a53 192 ff_init_vlc_sparse(&q3_vlc[1], MPC8_Q4_BITS, MPC8_Q4_SIZE,
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193 mpc8_q4_bits, 1, 1,
194 mpc8_q4_codes, 1, 1,
bd4110f9 195 mpc8_q4_syms, 1, 1, INIT_VLC_USE_NEW_STATIC);
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196
197 for(i = 0; i < 2; i++){
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198 res_vlc[i].table = &codes_table[vlc_offsets[0+i]];
199 res_vlc[i].table_allocated = vlc_offsets[1+i] - vlc_offsets[0+i];
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200 init_vlc(&res_vlc[i], MPC8_RES_BITS, MPC8_RES_SIZE,
201 &mpc8_res_bits[i], 1, 1,
bd4110f9 202 &mpc8_res_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
12877faf 203
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204 q2_vlc[i].table = &codes_table[vlc_offsets[2+i]];
205 q2_vlc[i].table_allocated = vlc_offsets[3+i] - vlc_offsets[2+i];
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206 init_vlc(&q2_vlc[i], MPC8_Q2_BITS, MPC8_Q2_SIZE,
207 &mpc8_q2_bits[i], 1, 1,
bd4110f9 208 &mpc8_q2_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
12877faf 209
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210 quant_vlc[0][i].table = &codes_table[vlc_offsets[4+i]];
211 quant_vlc[0][i].table_allocated = vlc_offsets[5+i] - vlc_offsets[4+i];
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212 init_vlc(&quant_vlc[0][i], MPC8_Q5_BITS, MPC8_Q5_SIZE,
213 &mpc8_q5_bits[i], 1, 1,
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214 &mpc8_q5_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
215 quant_vlc[1][i].table = &codes_table[vlc_offsets[6+i]];
216 quant_vlc[1][i].table_allocated = vlc_offsets[7+i] - vlc_offsets[6+i];
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217 init_vlc(&quant_vlc[1][i], MPC8_Q6_BITS, MPC8_Q6_SIZE,
218 &mpc8_q6_bits[i], 1, 1,
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219 &mpc8_q6_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
220 quant_vlc[2][i].table = &codes_table[vlc_offsets[8+i]];
221 quant_vlc[2][i].table_allocated = vlc_offsets[9+i] - vlc_offsets[8+i];
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222 init_vlc(&quant_vlc[2][i], MPC8_Q7_BITS, MPC8_Q7_SIZE,
223 &mpc8_q7_bits[i], 1, 1,
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224 &mpc8_q7_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
225 quant_vlc[3][i].table = &codes_table[vlc_offsets[10+i]];
226 quant_vlc[3][i].table_allocated = vlc_offsets[11+i] - vlc_offsets[10+i];
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227 init_vlc(&quant_vlc[3][i], MPC8_Q8_BITS, MPC8_Q8_SIZE,
228 &mpc8_q8_bits[i], 1, 1,
bd4110f9 229 &mpc8_q8_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
12877faf 230 }
5e534865 231 vlc_initialized = 1;
0eea2129 232
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233 return 0;
234}
235
0eea2129
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236static int mpc8_decode_frame(AVCodecContext * avctx, void *data,
237 int *got_frame_ptr, AVPacket *avpkt)
12877faf 238{
3a23752c 239 AVFrame *frame = data;
7a00bbad
TB
240 const uint8_t *buf = avpkt->data;
241 int buf_size = avpkt->size;
12877faf 242 MPCContext *c = avctx->priv_data;
6668bc80 243 BitstreamContext bc2, *bc = &bc2;
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244 int i, j, k, ch, cnt, res, t;
245 Band *bands = c->bands;
0eea2129 246 int off;
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247 int maxband, keyframe;
248 int last[2];
249
0eea2129 250 /* get output buffer */
3a23752c 251 frame->nb_samples = MPC_FRAME_SIZE;
759001c5 252 if ((res = ff_get_buffer(avctx, frame, 0)) < 0) {
0eea2129
JR
253 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
254 return res;
5674d4b0
JR
255 }
256
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257 keyframe = c->cur_frame == 0;
258
259 if(keyframe){
260 memset(c->Q, 0, sizeof(c->Q));
261 c->last_bits_used = 0;
262 }
a25dac97 263 bitstream_init8(bc, buf, buf_size);
6668bc80 264 bitstream_skip(bc, c->last_bits_used & 7);
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265
266 if(keyframe)
6668bc80 267 maxband = mpc8_get_mod_golomb(bc, c->maxbands + 1);
12877faf 268 else{
6668bc80 269 maxband = c->last_max_band + bitstream_read_vlc(bc, band_vlc.table, MPC8_BANDS_BITS, 2);
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270 if(maxband > 32) maxband -= 33;
271 }
b56825c4 272 if(maxband > c->maxbands + 1)
9bd854b1 273 return AVERROR_INVALIDDATA;
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274 c->last_max_band = maxband;
275
276 /* read subband indexes */
277 if(maxband){
278 last[0] = last[1] = 0;
279 for(i = maxband - 1; i >= 0; i--){
280 for(ch = 0; ch < 2; ch++){
6668bc80 281 last[ch] = bitstream_read_vlc(bc, res_vlc[last[ch] > 2].table, MPC8_RES_BITS, 2) + last[ch];
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282 if(last[ch] > 15) last[ch] -= 17;
283 bands[i].res[ch] = last[ch];
284 }
285 }
286 if(c->MSS){
287 int mask;
288
289 cnt = 0;
290 for(i = 0; i < maxband; i++)
291 if(bands[i].res[0] || bands[i].res[1])
292 cnt++;
6668bc80
AH
293 t = mpc8_get_mod_golomb(bc, cnt);
294 mask = mpc8_get_mask(bc, cnt, t);
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295 for(i = maxband - 1; i >= 0; i--)
296 if(bands[i].res[0] || bands[i].res[1]){
297 bands[i].msf = mask & 1;
298 mask >>= 1;
299 }
300 }
301 }
302 for(i = maxband; i < c->maxbands; i++)
303 bands[i].res[0] = bands[i].res[1] = 0;
304
305 if(keyframe){
306 for(i = 0; i < 32; i++)
307 c->oldDSCF[0][i] = c->oldDSCF[1][i] = 1;
308 }
309
310 for(i = 0; i < maxband; i++){
311 if(bands[i].res[0] || bands[i].res[1]){
312 cnt = !!bands[i].res[0] + !!bands[i].res[1] - 1;
313 if(cnt >= 0){
6668bc80 314 t = bitstream_read_vlc(bc, scfi_vlc[cnt].table, scfi_vlc[cnt].bits, 1);
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315 if(bands[i].res[0]) bands[i].scfi[0] = t >> (2 * cnt);
316 if(bands[i].res[1]) bands[i].scfi[1] = t & 3;
317 }
318 }
319 }
320
321 for(i = 0; i < maxband; i++){
322 for(ch = 0; ch < 2; ch++){
323 if(!bands[i].res[ch]) continue;
324
325 if(c->oldDSCF[ch][i]){
6668bc80 326 bands[i].scf_idx[ch][0] = bitstream_read(bc, 7) - 6;
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327 c->oldDSCF[ch][i] = 0;
328 }else{
6668bc80 329 t = bitstream_read_vlc(bc, dscf_vlc[1].table, MPC8_DSCF1_BITS, 2);
12877faf 330 if(t == 64)
6668bc80 331 t += bitstream_read(bc, 6);
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332 bands[i].scf_idx[ch][0] = ((bands[i].scf_idx[ch][2] + t - 25) & 0x7F) - 6;
333 }
334 for(j = 0; j < 2; j++){
335 if((bands[i].scfi[ch] << j) & 2)
336 bands[i].scf_idx[ch][j + 1] = bands[i].scf_idx[ch][j];
337 else{
6668bc80 338 t = bitstream_read_vlc(bc, dscf_vlc[0].table, MPC8_DSCF0_BITS, 2);
12877faf 339 if(t == 31)
6668bc80 340 t = 64 + bitstream_read(bc, 6);
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341 bands[i].scf_idx[ch][j + 1] = ((bands[i].scf_idx[ch][j] + t - 25) & 0x7F) - 6;
342 }
343 }
344 }
345 }
346
347 for(i = 0, off = 0; i < maxband; i++, off += SAMPLES_PER_BAND){
348 for(ch = 0; ch < 2; ch++){
349 res = bands[i].res[ch];
350 switch(res){
351 case -1:
352 for(j = 0; j < SAMPLES_PER_BAND; j++)
74e2a078 353 c->Q[ch][off + j] = (av_lfg_get(&c->rnd) & 0x3FC) - 510;
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354 break;
355 case 0:
356 break;
357 case 1:
358 for(j = 0; j < SAMPLES_PER_BAND; j += SAMPLES_PER_BAND / 2){
6668bc80
AH
359 cnt = bitstream_read_vlc(bc, q1_vlc.table, MPC8_Q1_BITS, 2);
360 t = mpc8_get_mask(bc, 18, cnt);
12877faf 361 for(k = 0; k < SAMPLES_PER_BAND / 2; k++, t <<= 1)
6668bc80 362 c->Q[ch][off + j + k] = (t & 0x20000) ? (bitstream_read_bit(bc) << 1) - 1 : 0;
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363 }
364 break;
365 case 2:
366 cnt = 6;//2*mpc8_thres[res]
367 for(j = 0; j < SAMPLES_PER_BAND; j += 3){
6668bc80 368 t = bitstream_read_vlc(bc, q2_vlc[cnt > 3].table, MPC8_Q2_BITS, 2);
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369 c->Q[ch][off + j + 0] = mpc8_idx50[t];
370 c->Q[ch][off + j + 1] = mpc8_idx51[t];
371 c->Q[ch][off + j + 2] = mpc8_idx52[t];
372 cnt = (cnt >> 1) + mpc8_huffq2[t];
373 }
374 break;
375 case 3:
376 case 4:
377 for(j = 0; j < SAMPLES_PER_BAND; j += 2){
6668bc80 378 t = bitstream_read_vlc(bc, q3_vlc[res - 3].table, MPC8_Q3_BITS, 2) + q3_offsets[res - 3];
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379 c->Q[ch][off + j + 1] = t >> 4;
380 c->Q[ch][off + j + 0] = (t & 8) ? (t & 0xF) - 16 : (t & 0xF);
381 }
382 break;
383 case 5:
384 case 6:
385 case 7:
386 case 8:
387 cnt = 2 * mpc8_thres[res];
388 for(j = 0; j < SAMPLES_PER_BAND; j++){
6668bc80 389 t = bitstream_read_vlc(bc, quant_vlc[res - 5][cnt > mpc8_thres[res]].table, quant_vlc[res - 5][cnt > mpc8_thres[res]].bits, 2) + quant_offsets[res - 5];
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KS
390 c->Q[ch][off + j] = t;
391 cnt = (cnt >> 1) + FFABS(c->Q[ch][off + j]);
392 }
393 break;
394 default:
395 for(j = 0; j < SAMPLES_PER_BAND; j++){
6668bc80 396 c->Q[ch][off + j] = bitstream_read_vlc(bc, q9up_vlc.table, MPC8_Q9UP_BITS, 2);
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397 if(res != 9){
398 c->Q[ch][off + j] <<= res - 9;
6668bc80 399 c->Q[ch][off + j] |= bitstream_read(bc, res - 9);
12877faf
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400 }
401 c->Q[ch][off + j] -= (1 << (res - 2)) - 1;
402 }
403 }
404 }
405 }
406
1a345903 407 ff_mpc_dequantize_and_synth(c, maxband - 1,
3a23752c 408 (int16_t **)frame->extended_data,
b56825c4 409 avctx->channels);
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410
411 c->cur_frame++;
412
6668bc80
AH
413 c->last_bits_used = bitstream_tell(bc);
414 if (bitstream_bits_left(bc) < 8) // we have only padding left
8f2aa89a 415 c->last_bits_used = buf_size << 3;
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416 if(c->cur_frame >= c->frames)
417 c->cur_frame = 0;
0eea2129 418
3a23752c 419 *got_frame_ptr = 1;
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420
421 return c->cur_frame ? c->last_bits_used >> 3 : buf_size;
422}
423
fdbeae44
JR
424static av_cold void mpc8_decode_flush(AVCodecContext *avctx)
425{
426 MPCContext *c = avctx->priv_data;
427 c->cur_frame = 0;
428}
429
d36beb3f 430AVCodec ff_mpc8_decoder = {
ec6402b7 431 .name = "mpc8",
b2bed932 432 .long_name = NULL_IF_CONFIG_SMALL("Musepack SV8"),
ec6402b7 433 .type = AVMEDIA_TYPE_AUDIO,
36ef5369 434 .id = AV_CODEC_ID_MUSEPACK8,
ec6402b7
AK
435 .priv_data_size = sizeof(MPCContext),
436 .init = mpc8_decode_init,
437 .decode = mpc8_decode_frame,
fdbeae44 438 .flush = mpc8_decode_flush,
def97856 439 .capabilities = AV_CODEC_CAP_DR1,
1a345903
JR
440 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
441 AV_SAMPLE_FMT_NONE },
12877faf 442};