| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * WMA compatible decoder | ||
| 3 | * Copyright (c) 2002 The FFmpeg Project | ||
| 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 | * WMA compatible decoder. | ||
| 25 | * This decoder handles Microsoft Windows Media Audio data, versions 1 & 2. | ||
| 26 | * WMA v1 is identified by audio format 0x160 in Microsoft media files | ||
| 27 | * (ASF/AVI/WAV). WMA v2 is identified by audio format 0x161. | ||
| 28 | * | ||
| 29 | * To use this decoder, a calling application must supply the extra data | ||
| 30 | * bytes provided with the WMA data. These are the extra, codec-specific | ||
| 31 | * bytes at the end of a WAVEFORMATEX data structure. Transmit these bytes | ||
| 32 | * to the decoder using the extradata[_size] fields in AVCodecContext. There | ||
| 33 | * should be 4 extra bytes for v1 data and 6 extra bytes for v2 data. | ||
| 34 | */ | ||
| 35 | |||
| 36 | #include "config_components.h" | ||
| 37 | |||
| 38 | #include "libavutil/attributes.h" | ||
| 39 | #include "libavutil/avassert.h" | ||
| 40 | #include "libavutil/ffmath.h" | ||
| 41 | |||
| 42 | #include "avcodec.h" | ||
| 43 | #include "codec_internal.h" | ||
| 44 | #include "decode.h" | ||
| 45 | #include "internal.h" | ||
| 46 | #include "wma.h" | ||
| 47 | |||
| 48 | #define EXPVLCBITS 8 | ||
| 49 | #define EXPMAX ((19 + EXPVLCBITS - 1) / EXPVLCBITS) | ||
| 50 | |||
| 51 | #define HGAINVLCBITS 9 | ||
| 52 | #define HGAINMAX ((13 + HGAINVLCBITS - 1) / HGAINVLCBITS) | ||
| 53 | |||
| 54 | static void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len); | ||
| 55 | |||
| 56 | #ifdef TRACE | ||
| 57 | static void dump_floats(WMACodecContext *s, const char *name, | ||
| 58 | int prec, const float *tab, int n) | ||
| 59 | { | ||
| 60 | int i; | ||
| 61 | |||
| 62 | ff_tlog(s->avctx, "%s[%d]:\n", name, n); | ||
| 63 | for (i = 0; i < n; i++) { | ||
| 64 | if ((i & 7) == 0) | ||
| 65 | ff_tlog(s->avctx, "%4d: ", i); | ||
| 66 | ff_tlog(s->avctx, " %8.*f", prec, tab[i]); | ||
| 67 | if ((i & 7) == 7) | ||
| 68 | ff_tlog(s->avctx, "\n"); | ||
| 69 | } | ||
| 70 | if ((i & 7) != 0) | ||
| 71 | ff_tlog(s->avctx, "\n"); | ||
| 72 | } | ||
| 73 | #endif /* TRACE */ | ||
| 74 | |||
| 75 | 14 | static av_cold int wma_decode_init(AVCodecContext *avctx) | |
| 76 | { | ||
| 77 | 14 | WMACodecContext *s = avctx->priv_data; | |
| 78 | int i, flags2, ret; | ||
| 79 | uint8_t *extradata; | ||
| 80 | |||
| 81 |
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14 | if (!avctx->block_align) { |
| 82 | ✗ | av_log(avctx, AV_LOG_ERROR, "block_align is not set\n"); | |
| 83 | ✗ | return AVERROR(EINVAL); | |
| 84 | } | ||
| 85 | |||
| 86 | 14 | s->avctx = avctx; | |
| 87 | |||
| 88 | /* extract flag info */ | ||
| 89 | 14 | flags2 = 0; | |
| 90 | 14 | extradata = avctx->extradata; | |
| 91 |
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14 | if (avctx->codec->id == AV_CODEC_ID_WMAV1 && avctx->extradata_size >= 4) |
| 92 | 2 | flags2 = AV_RL16(extradata + 2); | |
| 93 |
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12 | else if (avctx->codec->id == AV_CODEC_ID_WMAV2 && avctx->extradata_size >= 6) |
| 94 | 12 | flags2 = AV_RL16(extradata + 4); | |
| 95 | |||
| 96 | 14 | s->use_exp_vlc = flags2 & 0x0001; | |
| 97 | 14 | s->use_bit_reservoir = flags2 & 0x0002; | |
| 98 | 14 | s->use_variable_block_len = flags2 & 0x0004; | |
| 99 | |||
| 100 |
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14 | if (avctx->codec->id == AV_CODEC_ID_WMAV2 && avctx->extradata_size >= 8){ |
| 101 |
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11 | if (AV_RL16(extradata+4)==0xd && s->use_variable_block_len){ |
| 102 | ✗ | av_log(avctx, AV_LOG_WARNING, "Disabling use_variable_block_len, if this fails contact the ffmpeg developers and send us the file\n"); | |
| 103 | ✗ | s->use_variable_block_len= 0; // this fixes issue1503 | |
| 104 | } | ||
| 105 | } | ||
| 106 | |||
| 107 |
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42 | for (i=0; i<MAX_CHANNELS; i++) |
| 108 | 28 | s->max_exponent[i] = 1.0; | |
| 109 | |||
| 110 |
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14 | if ((ret = ff_wma_init(avctx, flags2)) < 0) |
| 111 | ✗ | return ret; | |
| 112 | |||
| 113 | /* init MDCT */ | ||
| 114 |
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51 | for (i = 0; i < s->nb_block_sizes; i++) { |
| 115 | 37 | float scale = 1.0 / 32768.0; | |
| 116 | 37 | ret = av_tx_init(&s->mdct_ctx[i], &s->mdct_fn[i], AV_TX_FLOAT_MDCT, | |
| 117 | 37 | 1, 1 << (s->frame_len_bits - i), &scale, AV_TX_FULL_IMDCT); | |
| 118 |
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37 | if (ret < 0) |
| 119 | ✗ | return ret; | |
| 120 | } | ||
| 121 | |||
| 122 |
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14 | if (s->use_noise_coding) { |
| 123 | 2 | ret = ff_vlc_init_from_lengths(&s->hgain_vlc, HGAINVLCBITS, | |
| 124 | FF_ARRAY_ELEMS(ff_wma_hgain_hufftab), | ||
| 125 | &ff_wma_hgain_hufftab[0][1], 2, | ||
| 126 | &ff_wma_hgain_hufftab[0][0], 2, 1, | ||
| 127 | -18, 0, avctx); | ||
| 128 |
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2 | if (ret < 0) |
| 129 | ✗ | return ret; | |
| 130 | } | ||
| 131 | |||
| 132 |
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14 | if (s->use_exp_vlc) { |
| 133 | // FIXME move out of context | ||
| 134 | 11 | ret = vlc_init(&s->exp_vlc, EXPVLCBITS, sizeof(ff_aac_scalefactor_bits), | |
| 135 | ff_aac_scalefactor_bits, 1, 1, | ||
| 136 | ff_aac_scalefactor_code, 4, 4, 0); | ||
| 137 |
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11 | if (ret < 0) |
| 138 | ✗ | return ret; | |
| 139 | } else | ||
| 140 | 3 | wma_lsp_to_curve_init(s, s->frame_len); | |
| 141 | |||
| 142 | 14 | avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; | |
| 143 | |||
| 144 | 14 | avctx->delay = s->frame_len * 2; | |
| 145 | |||
| 146 | 14 | return 0; | |
| 147 | } | ||
| 148 | |||
| 149 | /** | ||
| 150 | * compute x^-0.25 with an exponent and mantissa table. We use linear | ||
| 151 | * interpolation to reduce the mantissa table size at a small speed | ||
| 152 | * expense (linear interpolation approximately doubles the number of | ||
| 153 | * bits of precision). | ||
| 154 | */ | ||
| 155 | ✗ | static inline float pow_m1_4(WMACodecContext *s, float x) | |
| 156 | { | ||
| 157 | union { | ||
| 158 | float f; | ||
| 159 | unsigned int v; | ||
| 160 | } u, t; | ||
| 161 | unsigned int e, m; | ||
| 162 | float a, b; | ||
| 163 | |||
| 164 | ✗ | u.f = x; | |
| 165 | ✗ | e = u.v >> 23; | |
| 166 | ✗ | m = (u.v >> (23 - LSP_POW_BITS)) & ((1 << LSP_POW_BITS) - 1); | |
| 167 | /* build interpolation scale: 1 <= t < 2. */ | ||
| 168 | ✗ | t.v = ((u.v << LSP_POW_BITS) & ((1 << 23) - 1)) | (127 << 23); | |
| 169 | ✗ | a = s->lsp_pow_m_table1[m]; | |
| 170 | ✗ | b = s->lsp_pow_m_table2[m]; | |
| 171 | ✗ | return s->lsp_pow_e_table[e] * (a + b * t.f); | |
| 172 | } | ||
| 173 | |||
| 174 | 3 | static av_cold void wma_lsp_to_curve_init(WMACodecContext *s, int frame_len) | |
| 175 | { | ||
| 176 | float wdel, a, b; | ||
| 177 | int i, e, m; | ||
| 178 | |||
| 179 | 3 | wdel = M_PI / frame_len; | |
| 180 |
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1539 | for (i = 0; i < frame_len; i++) |
| 181 | 1536 | s->lsp_cos_table[i] = 2.0f * cos(wdel * i); | |
| 182 | |||
| 183 | /* tables for x^-0.25 computation */ | ||
| 184 |
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771 | for (i = 0; i < 256; i++) { |
| 185 | 768 | e = i - 126; | |
| 186 | 768 | s->lsp_pow_e_table[i] = exp2f(e * -0.25); | |
| 187 | } | ||
| 188 | |||
| 189 | /* NOTE: these two tables are needed to avoid two operations in | ||
| 190 | * pow_m1_4 */ | ||
| 191 | 3 | b = 1.0; | |
| 192 |
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387 | for (i = (1 << LSP_POW_BITS) - 1; i >= 0; i--) { |
| 193 | 384 | m = (1 << LSP_POW_BITS) + i; | |
| 194 | 384 | a = (float) m * (0.5 / (1 << LSP_POW_BITS)); | |
| 195 | 384 | a = 1/sqrt(sqrt(a)); | |
| 196 | 384 | s->lsp_pow_m_table1[i] = 2 * a - b; | |
| 197 | 384 | s->lsp_pow_m_table2[i] = b - a; | |
| 198 | 384 | b = a; | |
| 199 | } | ||
| 200 | 3 | } | |
| 201 | |||
| 202 | /** | ||
| 203 | * NOTE: We use the same code as Vorbis here | ||
| 204 | * @todo optimize it further with SSE/3Dnow | ||
| 205 | */ | ||
| 206 | ✗ | static void wma_lsp_to_curve(WMACodecContext *s, float *out, float *val_max_ptr, | |
| 207 | int n, float *lsp) | ||
| 208 | { | ||
| 209 | int i, j; | ||
| 210 | float p, q, w, v, val_max; | ||
| 211 | |||
| 212 | ✗ | val_max = 0; | |
| 213 | ✗ | for (i = 0; i < n; i++) { | |
| 214 | ✗ | p = 0.5f; | |
| 215 | ✗ | q = 0.5f; | |
| 216 | ✗ | w = s->lsp_cos_table[i]; | |
| 217 | ✗ | for (j = 1; j < NB_LSP_COEFS; j += 2) { | |
| 218 | ✗ | q *= w - lsp[j - 1]; | |
| 219 | ✗ | p *= w - lsp[j]; | |
| 220 | } | ||
| 221 | ✗ | p *= p * (2.0f - w); | |
| 222 | ✗ | q *= q * (2.0f + w); | |
| 223 | ✗ | v = p + q; | |
| 224 | ✗ | v = pow_m1_4(s, v); | |
| 225 | ✗ | if (v > val_max) | |
| 226 | ✗ | val_max = v; | |
| 227 | ✗ | out[i] = v; | |
| 228 | } | ||
| 229 | ✗ | *val_max_ptr = val_max; | |
| 230 | ✗ | } | |
| 231 | |||
| 232 | /** | ||
| 233 | * decode exponents coded with LSP coefficients (same idea as Vorbis) | ||
| 234 | */ | ||
| 235 | ✗ | static void decode_exp_lsp(WMACodecContext *s, int ch) | |
| 236 | { | ||
| 237 | float lsp_coefs[NB_LSP_COEFS]; | ||
| 238 | int val, i; | ||
| 239 | |||
| 240 | ✗ | for (i = 0; i < NB_LSP_COEFS; i++) { | |
| 241 | ✗ | if (i == 0 || i >= 8) | |
| 242 | ✗ | val = get_bits(&s->gb, 3); | |
| 243 | else | ||
| 244 | ✗ | val = get_bits(&s->gb, 4); | |
| 245 | ✗ | lsp_coefs[i] = ff_wma_lsp_codebook[i][val]; | |
| 246 | } | ||
| 247 | |||
| 248 | ✗ | wma_lsp_to_curve(s, s->exponents[ch], &s->max_exponent[ch], | |
| 249 | s->block_len, lsp_coefs); | ||
| 250 | ✗ | } | |
| 251 | |||
| 252 | /** pow(10, i / 16.0) for i in -60..95 */ | ||
| 253 | static const float pow_tab[] = { | ||
| 254 | 1.7782794100389e-04, 2.0535250264571e-04, | ||
| 255 | 2.3713737056617e-04, 2.7384196342644e-04, | ||
| 256 | 3.1622776601684e-04, 3.6517412725484e-04, | ||
| 257 | 4.2169650342858e-04, 4.8696752516586e-04, | ||
| 258 | 5.6234132519035e-04, 6.4938163157621e-04, | ||
| 259 | 7.4989420933246e-04, 8.6596432336006e-04, | ||
| 260 | 1.0000000000000e-03, 1.1547819846895e-03, | ||
| 261 | 1.3335214321633e-03, 1.5399265260595e-03, | ||
| 262 | 1.7782794100389e-03, 2.0535250264571e-03, | ||
| 263 | 2.3713737056617e-03, 2.7384196342644e-03, | ||
| 264 | 3.1622776601684e-03, 3.6517412725484e-03, | ||
| 265 | 4.2169650342858e-03, 4.8696752516586e-03, | ||
| 266 | 5.6234132519035e-03, 6.4938163157621e-03, | ||
| 267 | 7.4989420933246e-03, 8.6596432336006e-03, | ||
| 268 | 1.0000000000000e-02, 1.1547819846895e-02, | ||
| 269 | 1.3335214321633e-02, 1.5399265260595e-02, | ||
| 270 | 1.7782794100389e-02, 2.0535250264571e-02, | ||
| 271 | 2.3713737056617e-02, 2.7384196342644e-02, | ||
| 272 | 3.1622776601684e-02, 3.6517412725484e-02, | ||
| 273 | 4.2169650342858e-02, 4.8696752516586e-02, | ||
| 274 | 5.6234132519035e-02, 6.4938163157621e-02, | ||
| 275 | 7.4989420933246e-02, 8.6596432336007e-02, | ||
| 276 | 1.0000000000000e-01, 1.1547819846895e-01, | ||
| 277 | 1.3335214321633e-01, 1.5399265260595e-01, | ||
| 278 | 1.7782794100389e-01, 2.0535250264571e-01, | ||
| 279 | 2.3713737056617e-01, 2.7384196342644e-01, | ||
| 280 | 3.1622776601684e-01, 3.6517412725484e-01, | ||
| 281 | 4.2169650342858e-01, 4.8696752516586e-01, | ||
| 282 | 5.6234132519035e-01, 6.4938163157621e-01, | ||
| 283 | 7.4989420933246e-01, 8.6596432336007e-01, | ||
| 284 | 1.0000000000000e+00, 1.1547819846895e+00, | ||
| 285 | 1.3335214321633e+00, 1.5399265260595e+00, | ||
| 286 | 1.7782794100389e+00, 2.0535250264571e+00, | ||
| 287 | 2.3713737056617e+00, 2.7384196342644e+00, | ||
| 288 | 3.1622776601684e+00, 3.6517412725484e+00, | ||
| 289 | 4.2169650342858e+00, 4.8696752516586e+00, | ||
| 290 | 5.6234132519035e+00, 6.4938163157621e+00, | ||
| 291 | 7.4989420933246e+00, 8.6596432336007e+00, | ||
| 292 | 1.0000000000000e+01, 1.1547819846895e+01, | ||
| 293 | 1.3335214321633e+01, 1.5399265260595e+01, | ||
| 294 | 1.7782794100389e+01, 2.0535250264571e+01, | ||
| 295 | 2.3713737056617e+01, 2.7384196342644e+01, | ||
| 296 | 3.1622776601684e+01, 3.6517412725484e+01, | ||
| 297 | 4.2169650342858e+01, 4.8696752516586e+01, | ||
| 298 | 5.6234132519035e+01, 6.4938163157621e+01, | ||
| 299 | 7.4989420933246e+01, 8.6596432336007e+01, | ||
| 300 | 1.0000000000000e+02, 1.1547819846895e+02, | ||
| 301 | 1.3335214321633e+02, 1.5399265260595e+02, | ||
| 302 | 1.7782794100389e+02, 2.0535250264571e+02, | ||
| 303 | 2.3713737056617e+02, 2.7384196342644e+02, | ||
| 304 | 3.1622776601684e+02, 3.6517412725484e+02, | ||
| 305 | 4.2169650342858e+02, 4.8696752516586e+02, | ||
| 306 | 5.6234132519035e+02, 6.4938163157621e+02, | ||
| 307 | 7.4989420933246e+02, 8.6596432336007e+02, | ||
| 308 | 1.0000000000000e+03, 1.1547819846895e+03, | ||
| 309 | 1.3335214321633e+03, 1.5399265260595e+03, | ||
| 310 | 1.7782794100389e+03, 2.0535250264571e+03, | ||
| 311 | 2.3713737056617e+03, 2.7384196342644e+03, | ||
| 312 | 3.1622776601684e+03, 3.6517412725484e+03, | ||
| 313 | 4.2169650342858e+03, 4.8696752516586e+03, | ||
| 314 | 5.6234132519035e+03, 6.4938163157621e+03, | ||
| 315 | 7.4989420933246e+03, 8.6596432336007e+03, | ||
| 316 | 1.0000000000000e+04, 1.1547819846895e+04, | ||
| 317 | 1.3335214321633e+04, 1.5399265260595e+04, | ||
| 318 | 1.7782794100389e+04, 2.0535250264571e+04, | ||
| 319 | 2.3713737056617e+04, 2.7384196342644e+04, | ||
| 320 | 3.1622776601684e+04, 3.6517412725484e+04, | ||
| 321 | 4.2169650342858e+04, 4.8696752516586e+04, | ||
| 322 | 5.6234132519035e+04, 6.4938163157621e+04, | ||
| 323 | 7.4989420933246e+04, 8.6596432336007e+04, | ||
| 324 | 1.0000000000000e+05, 1.1547819846895e+05, | ||
| 325 | 1.3335214321633e+05, 1.5399265260595e+05, | ||
| 326 | 1.7782794100389e+05, 2.0535250264571e+05, | ||
| 327 | 2.3713737056617e+05, 2.7384196342644e+05, | ||
| 328 | 3.1622776601684e+05, 3.6517412725484e+05, | ||
| 329 | 4.2169650342858e+05, 4.8696752516586e+05, | ||
| 330 | 5.6234132519035e+05, 6.4938163157621e+05, | ||
| 331 | 7.4989420933246e+05, 8.6596432336007e+05, | ||
| 332 | }; | ||
| 333 | |||
| 334 | /** | ||
| 335 | * decode exponents coded with VLC codes | ||
| 336 | */ | ||
| 337 | 1136 | static int decode_exp_vlc(WMACodecContext *s, int ch) | |
| 338 | { | ||
| 339 | int last_exp, n, code; | ||
| 340 | const uint16_t *ptr; | ||
| 341 | float v, max_scale; | ||
| 342 | uint32_t *q, *q_end, iv; | ||
| 343 | 1136 | const float *ptab = pow_tab + 60; | |
| 344 | 1136 | const uint32_t *iptab = (const uint32_t *) ptab; | |
| 345 | |||
| 346 | 1136 | ptr = s->exponent_bands[s->frame_len_bits - s->block_len_bits]; | |
| 347 | 1136 | q = (uint32_t *) s->exponents[ch]; | |
| 348 | 1136 | q_end = q + s->block_len; | |
| 349 | 1136 | max_scale = 0; | |
| 350 |
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1136 | if (s->version == 1) { |
| 351 | 410 | last_exp = get_bits(&s->gb, 5) + 10; | |
| 352 | 410 | v = ptab[last_exp]; | |
| 353 | 410 | iv = iptab[last_exp]; | |
| 354 | 410 | max_scale = v; | |
| 355 | 410 | n = *ptr++; | |
| 356 |
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410 | switch (n & 3) do { |
| 357 | 820 | case 0: *q++ = iv; | |
| 358 | 820 | case 3: *q++ = iv; | |
| 359 | 820 | case 2: *q++ = iv; | |
| 360 | 1230 | case 1: *q++ = iv; | |
| 361 |
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1230 | } while ((n -= 4) > 0); |
| 362 | } else | ||
| 363 | 726 | last_exp = 36; | |
| 364 | |||
| 365 |
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29126 | while (q < q_end) { |
| 366 | 27990 | code = get_vlc2(&s->gb, s->exp_vlc.table, EXPVLCBITS, EXPMAX); | |
| 367 | /* NOTE: this offset is the same as MPEG-4 AAC! */ | ||
| 368 | 27990 | last_exp += code - 60; | |
| 369 |
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27990 | if ((unsigned) last_exp + 60 >= FF_ARRAY_ELEMS(pow_tab)) { |
| 370 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Exponent out of range: %d\n", | |
| 371 | last_exp); | ||
| 372 | ✗ | return AVERROR_INVALIDDATA; | |
| 373 | } | ||
| 374 | 27990 | v = ptab[last_exp]; | |
| 375 | 27990 | iv = iptab[last_exp]; | |
| 376 |
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27990 | if (v > max_scale) |
| 377 | 1141 | max_scale = v; | |
| 378 | 27990 | n = *ptr++; | |
| 379 |
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27990 | switch (n & 3) do { |
| 380 | 576712 | case 0: *q++ = iv; | |
| 381 | 579172 | case 3: *q++ = iv; | |
| 382 | 581632 | case 2: *q++ = iv; | |
| 383 | 585322 | case 1: *q++ = iv; | |
| 384 |
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585322 | } while ((n -= 4) > 0); |
| 385 | } | ||
| 386 | 1136 | s->max_exponent[ch] = max_scale; | |
| 387 | 1136 | return 0; | |
| 388 | } | ||
| 389 | |||
| 390 | /** | ||
| 391 | * Apply MDCT window and add into output. | ||
| 392 | * | ||
| 393 | * We ensure that when the windows overlap their squared sum | ||
| 394 | * is always 1 (MDCT reconstruction rule). | ||
| 395 | */ | ||
| 396 | 1172 | static void wma_window(WMACodecContext *s, float *out) | |
| 397 | { | ||
| 398 | 1172 | float *in = s->output; | |
| 399 | int block_len, bsize, n; | ||
| 400 | |||
| 401 | /* left part */ | ||
| 402 |
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1172 | if (s->block_len_bits <= s->prev_block_len_bits) { |
| 403 | 1172 | block_len = s->block_len; | |
| 404 | 1172 | bsize = s->frame_len_bits - s->block_len_bits; | |
| 405 | |||
| 406 | 1172 | s->fdsp->vector_fmul_add(out, in, s->windows[bsize], | |
| 407 | out, block_len); | ||
| 408 | } else { | ||
| 409 | ✗ | block_len = 1 << s->prev_block_len_bits; | |
| 410 | ✗ | n = (s->block_len - block_len) / 2; | |
| 411 | ✗ | bsize = s->frame_len_bits - s->prev_block_len_bits; | |
| 412 | |||
| 413 | ✗ | s->fdsp->vector_fmul_add(out + n, in + n, s->windows[bsize], | |
| 414 | ✗ | out + n, block_len); | |
| 415 | |||
| 416 | ✗ | memcpy(out + n + block_len, in + n + block_len, n * sizeof(float)); | |
| 417 | } | ||
| 418 | |||
| 419 | 1172 | out += s->block_len; | |
| 420 | 1172 | in += s->block_len; | |
| 421 | |||
| 422 | /* right part */ | ||
| 423 |
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1172 | if (s->block_len_bits <= s->next_block_len_bits) { |
| 424 | 1172 | block_len = s->block_len; | |
| 425 | 1172 | bsize = s->frame_len_bits - s->block_len_bits; | |
| 426 | |||
| 427 | 1172 | s->fdsp->vector_fmul_reverse(out, in, s->windows[bsize], block_len); | |
| 428 | } else { | ||
| 429 | ✗ | block_len = 1 << s->next_block_len_bits; | |
| 430 | ✗ | n = (s->block_len - block_len) / 2; | |
| 431 | ✗ | bsize = s->frame_len_bits - s->next_block_len_bits; | |
| 432 | |||
| 433 | ✗ | memcpy(out, in, n * sizeof(float)); | |
| 434 | |||
| 435 | ✗ | s->fdsp->vector_fmul_reverse(out + n, in + n, s->windows[bsize], | |
| 436 | block_len); | ||
| 437 | |||
| 438 | ✗ | memset(out + n + block_len, 0, n * sizeof(float)); | |
| 439 | } | ||
| 440 | 1172 | } | |
| 441 | |||
| 442 | /** | ||
| 443 | * @return | ||
| 444 | * 0 if OK. | ||
| 445 | * 1 if last block of frame. | ||
| 446 | * AVERROR if unrecoverable error. | ||
| 447 | */ | ||
| 448 | 586 | static int wma_decode_block(WMACodecContext *s) | |
| 449 | { | ||
| 450 | 586 | int channels = s->avctx->ch_layout.nb_channels; | |
| 451 | int n, v, a, bsize; | ||
| 452 | int coef_nb_bits, total_gain; | ||
| 453 | int nb_coefs[MAX_CHANNELS]; | ||
| 454 | float mdct_norm; | ||
| 455 | AVTXContext *mdct; | ||
| 456 | av_tx_fn mdct_fn; | ||
| 457 | |||
| 458 | av_assert2(channels <= MAX_CHANNELS); | ||
| 459 | |||
| 460 | #ifdef TRACE | ||
| 461 | ff_tlog(s->avctx, "***decode_block: %d:%d\n", | ||
| 462 | s->frame_count - 1, s->block_num); | ||
| 463 | #endif /* TRACE */ | ||
| 464 | |||
| 465 | /* compute current block length */ | ||
| 466 |
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586 | if (s->use_variable_block_len) { |
| 467 | ✗ | n = av_log2(s->nb_block_sizes - 1) + 1; | |
| 468 | |||
| 469 | ✗ | if (s->reset_block_lengths) { | |
| 470 | ✗ | s->reset_block_lengths = 0; | |
| 471 | ✗ | v = get_bits(&s->gb, n); | |
| 472 | ✗ | if (v >= s->nb_block_sizes) { | |
| 473 | ✗ | av_log(s->avctx, AV_LOG_ERROR, | |
| 474 | "prev_block_len_bits %d out of range\n", | ||
| 475 | ✗ | s->frame_len_bits - v); | |
| 476 | ✗ | return AVERROR_INVALIDDATA; | |
| 477 | } | ||
| 478 | ✗ | s->prev_block_len_bits = s->frame_len_bits - v; | |
| 479 | ✗ | v = get_bits(&s->gb, n); | |
| 480 | ✗ | if (v >= s->nb_block_sizes) { | |
| 481 | ✗ | av_log(s->avctx, AV_LOG_ERROR, | |
| 482 | "block_len_bits %d out of range\n", | ||
| 483 | ✗ | s->frame_len_bits - v); | |
| 484 | ✗ | return AVERROR_INVALIDDATA; | |
| 485 | } | ||
| 486 | ✗ | s->block_len_bits = s->frame_len_bits - v; | |
| 487 | } else { | ||
| 488 | /* update block lengths */ | ||
| 489 | ✗ | s->prev_block_len_bits = s->block_len_bits; | |
| 490 | ✗ | s->block_len_bits = s->next_block_len_bits; | |
| 491 | } | ||
| 492 | ✗ | v = get_bits(&s->gb, n); | |
| 493 | ✗ | if (v >= s->nb_block_sizes) { | |
| 494 | ✗ | av_log(s->avctx, AV_LOG_ERROR, | |
| 495 | "next_block_len_bits %d out of range\n", | ||
| 496 | ✗ | s->frame_len_bits - v); | |
| 497 | ✗ | return AVERROR_INVALIDDATA; | |
| 498 | } | ||
| 499 | ✗ | s->next_block_len_bits = s->frame_len_bits - v; | |
| 500 | } else { | ||
| 501 | /* fixed block len */ | ||
| 502 | 586 | s->next_block_len_bits = s->frame_len_bits; | |
| 503 | 586 | s->prev_block_len_bits = s->frame_len_bits; | |
| 504 | 586 | s->block_len_bits = s->frame_len_bits; | |
| 505 | } | ||
| 506 | |||
| 507 |
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586 | if (s->frame_len_bits - s->block_len_bits >= s->nb_block_sizes){ |
| 508 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "block_len_bits not initialized to a valid value\n"); | |
| 509 | ✗ | return AVERROR_INVALIDDATA; | |
| 510 | } | ||
| 511 | |||
| 512 | /* now check if the block length is coherent with the frame length */ | ||
| 513 | 586 | s->block_len = 1 << s->block_len_bits; | |
| 514 |
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586 | if ((s->block_pos + s->block_len) > s->frame_len) { |
| 515 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "frame_len overflow\n"); | |
| 516 | ✗ | return AVERROR_INVALIDDATA; | |
| 517 | } | ||
| 518 | |||
| 519 |
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586 | if (channels == 2) |
| 520 | 586 | s->ms_stereo = get_bits1(&s->gb); | |
| 521 | 586 | v = 0; | |
| 522 |
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1758 | for (int ch = 0; ch < channels; ch++) { |
| 523 | 1172 | a = get_bits1(&s->gb); | |
| 524 | 1172 | s->channel_coded[ch] = a; | |
| 525 | 1172 | v |= a; | |
| 526 | } | ||
| 527 | |||
| 528 | 586 | bsize = s->frame_len_bits - s->block_len_bits; | |
| 529 | |||
| 530 | /* if no channel coded, no need to go further */ | ||
| 531 | /* XXX: fix potential framing problems */ | ||
| 532 |
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586 | if (!v) |
| 533 | ✗ | goto next; | |
| 534 | |||
| 535 | /* read total gain and extract corresponding number of bits for | ||
| 536 | * coef escape coding */ | ||
| 537 | 586 | total_gain = 1; | |
| 538 | for (;;) { | ||
| 539 |
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|
586 | if (get_bits_left(&s->gb) < 7) { |
| 540 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "total_gain overread\n"); | |
| 541 | ✗ | return AVERROR_INVALIDDATA; | |
| 542 | } | ||
| 543 | 586 | a = get_bits(&s->gb, 7); | |
| 544 | 586 | total_gain += a; | |
| 545 |
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586 | if (a != 127) |
| 546 | 586 | break; | |
| 547 | } | ||
| 548 | |||
| 549 | 586 | coef_nb_bits = ff_wma_total_gain_to_bits(total_gain); | |
| 550 | |||
| 551 | /* compute number of coefficients */ | ||
| 552 | 586 | n = s->coefs_end[bsize] - s->coefs_start; | |
| 553 |
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|
1758 | for (int ch = 0; ch < channels; ch++) |
| 554 | 1172 | nb_coefs[ch] = n; | |
| 555 | |||
| 556 | /* complex coding */ | ||
| 557 |
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586 | if (s->use_noise_coding) { |
| 558 | ✗ | for (int ch = 0; ch < channels; ch++) { | |
| 559 | ✗ | if (s->channel_coded[ch]) { | |
| 560 | int n; | ||
| 561 | ✗ | n = s->exponent_high_sizes[bsize]; | |
| 562 | ✗ | for (int i = 0; i < n; i++) { | |
| 563 | ✗ | const unsigned a = get_bits1(&s->gb); | |
| 564 | ✗ | s->high_band_coded[ch][i] = a; | |
| 565 | /* if noise coding, the coefficients are not transmitted */ | ||
| 566 | ✗ | if (a) | |
| 567 | ✗ | nb_coefs[ch] -= s->exponent_high_bands[bsize][i]; | |
| 568 | } | ||
| 569 | } | ||
| 570 | } | ||
| 571 | ✗ | for (int ch = 0; ch < channels; ch++) { | |
| 572 | ✗ | if (s->channel_coded[ch]) { | |
| 573 | int n, val; | ||
| 574 | |||
| 575 | ✗ | n = s->exponent_high_sizes[bsize]; | |
| 576 | ✗ | val = (int) 0x80000000; | |
| 577 | ✗ | for (int i = 0; i < n; i++) { | |
| 578 | ✗ | if (s->high_band_coded[ch][i]) { | |
| 579 | ✗ | if (val == (int) 0x80000000) { | |
| 580 | ✗ | val = get_bits(&s->gb, 7) - 19; | |
| 581 | } else { | ||
| 582 | ✗ | val += get_vlc2(&s->gb, s->hgain_vlc.table, | |
| 583 | HGAINVLCBITS, HGAINMAX); | ||
| 584 | } | ||
| 585 | ✗ | s->high_band_values[ch][i] = val; | |
| 586 | } | ||
| 587 | } | ||
| 588 | } | ||
| 589 | } | ||
| 590 | } | ||
| 591 | |||
| 592 | /* exponents can be reused in short blocks. */ | ||
| 593 |
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586 | if ((s->block_len_bits == s->frame_len_bits) || get_bits1(&s->gb)) { |
| 594 |
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1758 | for (int ch = 0; ch < channels; ch++) { |
| 595 |
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1172 | if (s->channel_coded[ch]) { |
| 596 |
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1136 | if (s->use_exp_vlc) { |
| 597 |
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1136 | if (decode_exp_vlc(s, ch) < 0) |
| 598 | ✗ | return AVERROR_INVALIDDATA; | |
| 599 | } else { | ||
| 600 | ✗ | decode_exp_lsp(s, ch); | |
| 601 | } | ||
| 602 | 1136 | s->exponents_bsize[ch] = bsize; | |
| 603 | 1136 | s->exponents_initialized[ch] = 1; | |
| 604 | } | ||
| 605 | } | ||
| 606 | } | ||
| 607 | |||
| 608 |
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1758 | for (int ch = 0; ch < channels; ch++) { |
| 609 |
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1172 | if (s->channel_coded[ch] && !s->exponents_initialized[ch]) |
| 610 | ✗ | return AVERROR_INVALIDDATA; | |
| 611 | } | ||
| 612 | |||
| 613 | /* parse spectral coefficients : just RLE encoding */ | ||
| 614 |
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1758 | for (int ch = 0; ch < channels; ch++) { |
| 615 |
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1172 | if (s->channel_coded[ch]) { |
| 616 | int tindex; | ||
| 617 | 1136 | WMACoef *ptr = &s->coefs1[ch][0]; | |
| 618 | int ret; | ||
| 619 | |||
| 620 | /* special VLC tables are used for ms stereo because | ||
| 621 | * there is potentially less energy there */ | ||
| 622 |
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|
1136 | tindex = (ch == 1 && s->ms_stereo); |
| 623 | 1136 | memset(ptr, 0, s->block_len * sizeof(WMACoef)); | |
| 624 | 1136 | ret = ff_wma_run_level_decode(s->avctx, &s->gb, s->coef_vlc[tindex].table, | |
| 625 | 1136 | s->level_table[tindex], s->run_table[tindex], | |
| 626 | 0, ptr, 0, nb_coefs[ch], | ||
| 627 | s->block_len, s->frame_len_bits, coef_nb_bits); | ||
| 628 |
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1136 | if (ret < 0) |
| 629 | ✗ | return ret; | |
| 630 | } | ||
| 631 |
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1172 | if (s->version == 1 && channels >= 2) |
| 632 | 410 | align_get_bits(&s->gb); | |
| 633 | } | ||
| 634 | |||
| 635 | /* normalize */ | ||
| 636 | { | ||
| 637 | 586 | int n4 = s->block_len / 2; | |
| 638 | 586 | mdct_norm = 1.0 / (float) n4; | |
| 639 |
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586 | if (s->version == 1) |
| 640 | 205 | mdct_norm *= sqrt(n4); | |
| 641 | } | ||
| 642 | |||
| 643 | /* finally compute the MDCT coefficients */ | ||
| 644 |
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1758 | for (int ch = 0; ch < channels; ch++) { |
| 645 |
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1172 | if (s->channel_coded[ch]) { |
| 646 | WMACoef *coefs1; | ||
| 647 | float *coefs, *exponents, mult, mult1, noise; | ||
| 648 | int n, n1, last_high_band, esize; | ||
| 649 | float exp_power[HIGH_BAND_MAX_SIZE]; | ||
| 650 | |||
| 651 | 1136 | coefs1 = s->coefs1[ch]; | |
| 652 | 1136 | exponents = s->exponents[ch]; | |
| 653 | 1136 | esize = s->exponents_bsize[ch]; | |
| 654 | 1136 | mult = ff_exp10(total_gain * 0.05) / s->max_exponent[ch]; | |
| 655 | 1136 | mult *= mdct_norm; | |
| 656 | 1136 | coefs = s->coefs[ch]; | |
| 657 |
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1136 | if (s->use_noise_coding) { |
| 658 | ✗ | mult1 = mult; | |
| 659 | /* very low freqs : noise */ | ||
| 660 | ✗ | for (int i = 0; i < s->coefs_start; i++) { | |
| 661 | ✗ | *coefs++ = s->noise_table[s->noise_index] * | |
| 662 | ✗ | exponents[i << bsize >> esize] * mult1; | |
| 663 | ✗ | s->noise_index = (s->noise_index + 1) & | |
| 664 | (NOISE_TAB_SIZE - 1); | ||
| 665 | } | ||
| 666 | |||
| 667 | ✗ | n1 = s->exponent_high_sizes[bsize]; | |
| 668 | |||
| 669 | /* compute power of high bands */ | ||
| 670 | ✗ | exponents = s->exponents[ch] + | |
| 671 | ✗ | (s->high_band_start[bsize] << bsize >> esize); | |
| 672 | ✗ | last_high_band = 0; /* avoid warning */ | |
| 673 | ✗ | for (int j = 0; j < n1; j++) { | |
| 674 | ✗ | n = s->exponent_high_bands[s->frame_len_bits - | |
| 675 | ✗ | s->block_len_bits][j]; | |
| 676 | ✗ | if (s->high_band_coded[ch][j]) { | |
| 677 | float e2, v; | ||
| 678 | ✗ | e2 = 0; | |
| 679 | ✗ | for (int i = 0; i < n; i++) { | |
| 680 | ✗ | v = exponents[i << bsize >> esize]; | |
| 681 | ✗ | e2 += v * v; | |
| 682 | } | ||
| 683 | ✗ | exp_power[j] = e2 / n; | |
| 684 | ✗ | last_high_band = j; | |
| 685 | ff_tlog(s->avctx, "%d: power=%f (%d)\n", j, exp_power[j], n); | ||
| 686 | } | ||
| 687 | ✗ | exponents += n << bsize >> esize; | |
| 688 | } | ||
| 689 | |||
| 690 | /* main freqs and high freqs */ | ||
| 691 | ✗ | exponents = s->exponents[ch] + (s->coefs_start << bsize >> esize); | |
| 692 | ✗ | for (int j = -1; j < n1; j++) { | |
| 693 | ✗ | if (j < 0) | |
| 694 | ✗ | n = s->high_band_start[bsize] - s->coefs_start; | |
| 695 | else | ||
| 696 | ✗ | n = s->exponent_high_bands[s->frame_len_bits - | |
| 697 | ✗ | s->block_len_bits][j]; | |
| 698 | ✗ | if (j >= 0 && s->high_band_coded[ch][j]) { | |
| 699 | /* use noise with specified power */ | ||
| 700 | ✗ | mult1 = sqrt(exp_power[j] / exp_power[last_high_band]); | |
| 701 | /* XXX: use a table */ | ||
| 702 | ✗ | mult1 = mult1 * ff_exp10(s->high_band_values[ch][j] * 0.05); | |
| 703 | ✗ | mult1 = mult1 / (s->max_exponent[ch] * s->noise_mult); | |
| 704 | ✗ | mult1 *= mdct_norm; | |
| 705 | ✗ | for (int i = 0; i < n; i++) { | |
| 706 | ✗ | noise = s->noise_table[s->noise_index]; | |
| 707 | ✗ | s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1); | |
| 708 | ✗ | *coefs++ = noise * exponents[i << bsize >> esize] * mult1; | |
| 709 | } | ||
| 710 | ✗ | exponents += n << bsize >> esize; | |
| 711 | } else { | ||
| 712 | /* coded values + small noise */ | ||
| 713 | ✗ | for (int i = 0; i < n; i++) { | |
| 714 | ✗ | noise = s->noise_table[s->noise_index]; | |
| 715 | ✗ | s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1); | |
| 716 | ✗ | *coefs++ = ((*coefs1++) + noise) * | |
| 717 | ✗ | exponents[i << bsize >> esize] * mult; | |
| 718 | } | ||
| 719 | ✗ | exponents += n << bsize >> esize; | |
| 720 | } | ||
| 721 | } | ||
| 722 | |||
| 723 | /* very high freqs : noise */ | ||
| 724 | ✗ | n = s->block_len - s->coefs_end[bsize]; | |
| 725 | ✗ | mult1 = mult * exponents[(-(1 << bsize)) >> esize]; | |
| 726 | ✗ | for (int i = 0; i < n; i++) { | |
| 727 | ✗ | *coefs++ = s->noise_table[s->noise_index] * mult1; | |
| 728 | ✗ | s->noise_index = (s->noise_index + 1) & (NOISE_TAB_SIZE - 1); | |
| 729 | } | ||
| 730 | } else { | ||
| 731 | /* XXX: optimize more */ | ||
| 732 |
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2366 | for (int i = 0; i < s->coefs_start; i++) |
| 733 | 1230 | *coefs++ = 0.0; | |
| 734 | 1136 | n = nb_coefs[ch]; | |
| 735 |
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2117410 | for (int i = 0; i < n; i++) |
| 736 | 2116274 | *coefs++ = coefs1[i] * exponents[i << bsize >> esize] * mult; | |
| 737 | 1136 | n = s->block_len - s->coefs_end[bsize]; | |
| 738 |
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|
210160 | for (int i = 0; i < n; i++) |
| 739 | 209024 | *coefs++ = 0.0; | |
| 740 | } | ||
| 741 | } | ||
| 742 | } | ||
| 743 | |||
| 744 | #ifdef TRACE | ||
| 745 | for (int ch = 0; ch < channels; ch++) { | ||
| 746 | if (s->channel_coded[ch]) { | ||
| 747 | dump_floats(s, "exponents", 3, s->exponents[ch], s->block_len); | ||
| 748 | dump_floats(s, "coefs", 1, s->coefs[ch], s->block_len); | ||
| 749 | } | ||
| 750 | } | ||
| 751 | #endif /* TRACE */ | ||
| 752 | |||
| 753 |
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586 | if (s->ms_stereo && s->channel_coded[1]) { |
| 754 | /* nominal case for ms stereo: we do it before mdct */ | ||
| 755 | /* no need to optimize this case because it should almost | ||
| 756 | * never happen */ | ||
| 757 |
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480 | if (!s->channel_coded[0]) { |
| 758 | ff_tlog(s->avctx, "rare ms-stereo case happened\n"); | ||
| 759 | ✗ | memset(s->coefs[0], 0, sizeof(float) * s->block_len); | |
| 760 | ✗ | s->channel_coded[0] = 1; | |
| 761 | } | ||
| 762 | |||
| 763 | 480 | s->fdsp->butterflies_float(s->coefs[0], s->coefs[1], s->block_len); | |
| 764 | } | ||
| 765 | |||
| 766 | 106 | next: | |
| 767 | 586 | mdct = s->mdct_ctx[bsize]; | |
| 768 | 586 | mdct_fn = s->mdct_fn[bsize]; | |
| 769 | |||
| 770 |
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1758 | for (int ch = 0; ch < channels; ch++) { |
| 771 | int n4, index; | ||
| 772 | |||
| 773 | 1172 | n4 = s->block_len / 2; | |
| 774 |
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1172 | if (s->channel_coded[ch]) |
| 775 | 1136 | mdct_fn(mdct, s->output, s->coefs[ch], sizeof(float)); | |
| 776 |
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36 | else if (!(s->ms_stereo && ch == 1)) |
| 777 | 35 | memset(s->output, 0, sizeof(s->output)); | |
| 778 | |||
| 779 | /* multiply by the window and add in the frame */ | ||
| 780 | 1172 | index = (s->frame_len / 2) + s->block_pos - n4; | |
| 781 | 1172 | wma_window(s, &s->frame_out[ch][index]); | |
| 782 | } | ||
| 783 | |||
| 784 | /* update block number */ | ||
| 785 | 586 | s->block_num++; | |
| 786 | 586 | s->block_pos += s->block_len; | |
| 787 |
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586 | if (s->block_pos >= s->frame_len) |
| 788 | 586 | return 1; | |
| 789 | else | ||
| 790 | ✗ | return 0; | |
| 791 | } | ||
| 792 | |||
| 793 | /* decode a frame of frame_len samples */ | ||
| 794 | 586 | static int wma_decode_frame(WMACodecContext *s, float **samples, | |
| 795 | int samples_offset) | ||
| 796 | { | ||
| 797 | #ifdef TRACE | ||
| 798 | ff_tlog(s->avctx, "***decode_frame: %d size=%d\n", | ||
| 799 | s->frame_count++, s->frame_len); | ||
| 800 | #endif /* TRACE */ | ||
| 801 | |||
| 802 | /* read each block */ | ||
| 803 | 586 | s->block_num = 0; | |
| 804 | 586 | s->block_pos = 0; | |
| 805 | ✗ | for (;;) { | |
| 806 | 586 | int ret = wma_decode_block(s); | |
| 807 |
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586 | if (ret < 0) |
| 808 | ✗ | return ret; | |
| 809 |
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|
586 | if (ret) |
| 810 | 586 | break; | |
| 811 | } | ||
| 812 | |||
| 813 |
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|
1758 | for (int ch = 0; ch < s->avctx->ch_layout.nb_channels; ch++) { |
| 814 | /* copy current block to output */ | ||
| 815 | 1172 | memcpy(samples[ch] + samples_offset, s->frame_out[ch], | |
| 816 | 1172 | s->frame_len * sizeof(*s->frame_out[ch])); | |
| 817 | /* prepare for next block */ | ||
| 818 | 1172 | memmove(&s->frame_out[ch][0], &s->frame_out[ch][s->frame_len], | |
| 819 | 1172 | s->frame_len * sizeof(*s->frame_out[ch])); | |
| 820 | |||
| 821 | #ifdef TRACE | ||
| 822 | dump_floats(s, "samples", 6, samples[ch] + samples_offset, | ||
| 823 | s->frame_len); | ||
| 824 | #endif /* TRACE */ | ||
| 825 | } | ||
| 826 | |||
| 827 | 586 | return 0; | |
| 828 | } | ||
| 829 | |||
| 830 | 593 | static int wma_decode_superframe(AVCodecContext *avctx, AVFrame *frame, | |
| 831 | int *got_frame_ptr, AVPacket *avpkt) | ||
| 832 | { | ||
| 833 | 593 | const uint8_t *buf = avpkt->data; | |
| 834 | 593 | int buf_size = avpkt->size; | |
| 835 | 593 | WMACodecContext *s = avctx->priv_data; | |
| 836 | int nb_frames, bit_offset, pos, len, ret; | ||
| 837 | uint8_t *q; | ||
| 838 | float **samples; | ||
| 839 | int samples_offset; | ||
| 840 | |||
| 841 | ff_tlog(avctx, "***decode_superframe:\n"); | ||
| 842 | |||
| 843 |
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|
593 | if (buf_size == 0) { |
| 844 |
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|
6 | if (s->eof_done) |
| 845 | 3 | return 0; | |
| 846 | |||
| 847 | 3 | frame->nb_samples = s->frame_len; | |
| 848 |
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|
3 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 849 | ✗ | return ret; | |
| 850 | |||
| 851 | 3 | frame->pts = AV_NOPTS_VALUE; | |
| 852 |
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|
9 | for (int i = 0; i < s->avctx->ch_layout.nb_channels; i++) |
| 853 | 6 | memcpy(frame->extended_data[i], &s->frame_out[i][0], | |
| 854 | 6 | frame->nb_samples * sizeof(s->frame_out[i][0])); | |
| 855 | |||
| 856 | 3 | s->last_superframe_len = 0; | |
| 857 | 3 | s->eof_done = 1; | |
| 858 | 3 | *got_frame_ptr = 1; | |
| 859 | 3 | return 0; | |
| 860 | } | ||
| 861 |
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|
587 | if (buf_size < avctx->block_align) { |
| 862 | 1 | av_log(avctx, AV_LOG_ERROR, | |
| 863 | "Input packet size too small (%d < %d)\n", | ||
| 864 | buf_size, avctx->block_align); | ||
| 865 | 1 | return AVERROR_INVALIDDATA; | |
| 866 | } | ||
| 867 |
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|
586 | if (avctx->block_align) |
| 868 | 586 | buf_size = avctx->block_align; | |
| 869 | |||
| 870 | 586 | init_get_bits(&s->gb, buf, buf_size * 8); | |
| 871 | |||
| 872 |
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|
586 | if (s->use_bit_reservoir) { |
| 873 | /* read super frame header */ | ||
| 874 | ✗ | skip_bits(&s->gb, 4); /* super frame index */ | |
| 875 | ✗ | nb_frames = get_bits(&s->gb, 4) - (s->last_superframe_len <= 0); | |
| 876 | ✗ | if (nb_frames <= 0) { | |
| 877 | ✗ | int is_error = nb_frames < 0 || get_bits_left(&s->gb) <= 8; | |
| 878 | ✗ | av_log(avctx, is_error ? AV_LOG_ERROR : AV_LOG_WARNING, | |
| 879 | "nb_frames is %d bits left %d\n", | ||
| 880 | nb_frames, get_bits_left(&s->gb)); | ||
| 881 | ✗ | if (is_error) | |
| 882 | ✗ | return AVERROR_INVALIDDATA; | |
| 883 | |||
| 884 | ✗ | if ((s->last_superframe_len + buf_size - 1) > | |
| 885 | MAX_CODED_SUPERFRAME_SIZE) { | ||
| 886 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 887 | ✗ | goto fail; | |
| 888 | } | ||
| 889 | |||
| 890 | ✗ | q = s->last_superframe + s->last_superframe_len; | |
| 891 | ✗ | len = buf_size - 1; | |
| 892 | ✗ | while (len > 0) { | |
| 893 | ✗ | *q++ = get_bits (&s->gb, 8); | |
| 894 | ✗ | len --; | |
| 895 | } | ||
| 896 | ✗ | memset(q, 0, AV_INPUT_BUFFER_PADDING_SIZE); | |
| 897 | |||
| 898 | ✗ | s->last_superframe_len += 8*buf_size - 8; | |
| 899 | // s->reset_block_lengths = 1; //XXX is this needed ? | ||
| 900 | ✗ | *got_frame_ptr = 0; | |
| 901 | ✗ | return buf_size; | |
| 902 | } | ||
| 903 | } else | ||
| 904 | 586 | nb_frames = 1; | |
| 905 | |||
| 906 | /* get output buffer */ | ||
| 907 | 586 | frame->nb_samples = nb_frames * s->frame_len; | |
| 908 |
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|
586 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 909 | ✗ | return ret; | |
| 910 | 586 | samples = (float **) frame->extended_data; | |
| 911 | 586 | samples_offset = 0; | |
| 912 | |||
| 913 |
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|
586 | if (s->use_bit_reservoir) { |
| 914 | ✗ | bit_offset = get_bits(&s->gb, s->byte_offset_bits + 3); | |
| 915 | ✗ | if (bit_offset > get_bits_left(&s->gb)) { | |
| 916 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
| 917 | "Invalid last frame bit offset %d > buf size %d (%d)\n", | ||
| 918 | bit_offset, get_bits_left(&s->gb), buf_size); | ||
| 919 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 920 | ✗ | goto fail; | |
| 921 | } | ||
| 922 | |||
| 923 | ✗ | if (s->last_superframe_len > 0) { | |
| 924 | /* add bit_offset bits to last frame */ | ||
| 925 | ✗ | if ((s->last_superframe_len + ((bit_offset + 7) >> 3)) > | |
| 926 | MAX_CODED_SUPERFRAME_SIZE) { | ||
| 927 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 928 | ✗ | goto fail; | |
| 929 | } | ||
| 930 | ✗ | q = s->last_superframe + s->last_superframe_len; | |
| 931 | ✗ | len = bit_offset; | |
| 932 | ✗ | while (len > 7) { | |
| 933 | ✗ | *q++ = get_bits(&s->gb, 8); | |
| 934 | ✗ | len -= 8; | |
| 935 | } | ||
| 936 | ✗ | if (len > 0) | |
| 937 | ✗ | *q++ = get_bits(&s->gb, len) << (8 - len); | |
| 938 | ✗ | memset(q, 0, AV_INPUT_BUFFER_PADDING_SIZE); | |
| 939 | |||
| 940 | /* XXX: bit_offset bits into last frame */ | ||
| 941 | ✗ | init_get_bits(&s->gb, s->last_superframe, | |
| 942 | ✗ | s->last_superframe_len * 8 + bit_offset); | |
| 943 | /* skip unused bits */ | ||
| 944 | ✗ | if (s->last_bitoffset > 0) | |
| 945 | ✗ | skip_bits(&s->gb, s->last_bitoffset); | |
| 946 | /* this frame is stored in the last superframe and in the | ||
| 947 | * current one */ | ||
| 948 | ✗ | if ((ret = wma_decode_frame(s, samples, samples_offset)) < 0) | |
| 949 | ✗ | goto fail; | |
| 950 | ✗ | samples_offset += s->frame_len; | |
| 951 | ✗ | nb_frames--; | |
| 952 | } | ||
| 953 | |||
| 954 | /* read each frame starting from bit_offset */ | ||
| 955 | ✗ | pos = bit_offset + 4 + 4 + s->byte_offset_bits + 3; | |
| 956 | ✗ | if (pos >= MAX_CODED_SUPERFRAME_SIZE * 8 || pos > buf_size * 8) | |
| 957 | ✗ | return AVERROR_INVALIDDATA; | |
| 958 | ✗ | init_get_bits(&s->gb, buf + (pos >> 3), (buf_size - (pos >> 3)) * 8); | |
| 959 | ✗ | len = pos & 7; | |
| 960 | ✗ | if (len > 0) | |
| 961 | ✗ | skip_bits(&s->gb, len); | |
| 962 | |||
| 963 | ✗ | s->reset_block_lengths = 1; | |
| 964 | ✗ | for (int i = 0; i < nb_frames; i++) { | |
| 965 | ✗ | if ((ret = wma_decode_frame(s, samples, samples_offset)) < 0) | |
| 966 | ✗ | goto fail; | |
| 967 | ✗ | samples_offset += s->frame_len; | |
| 968 | } | ||
| 969 | |||
| 970 | /* we copy the end of the frame in the last frame buffer */ | ||
| 971 | ✗ | pos = get_bits_count(&s->gb) + | |
| 972 | ✗ | ((bit_offset + 4 + 4 + s->byte_offset_bits + 3) & ~7); | |
| 973 | ✗ | s->last_bitoffset = pos & 7; | |
| 974 | ✗ | pos >>= 3; | |
| 975 | ✗ | len = buf_size - pos; | |
| 976 | ✗ | if (len > MAX_CODED_SUPERFRAME_SIZE || len < 0) { | |
| 977 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "len %d invalid\n", len); | |
| 978 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 979 | ✗ | goto fail; | |
| 980 | } | ||
| 981 | ✗ | s->last_superframe_len = len; | |
| 982 | ✗ | memcpy(s->last_superframe, buf + pos, len); | |
| 983 | } else { | ||
| 984 | /* single frame decode */ | ||
| 985 |
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|
586 | if ((ret = wma_decode_frame(s, samples, samples_offset)) < 0) |
| 986 | ✗ | goto fail; | |
| 987 | 586 | samples_offset += s->frame_len; | |
| 988 | } | ||
| 989 | |||
| 990 | ff_dlog(s->avctx, "%d %d %d %d eaten:%d\n", | ||
| 991 | s->frame_len_bits, s->block_len_bits, s->frame_len, s->block_len, | ||
| 992 | avctx->block_align); | ||
| 993 | |||
| 994 | 586 | *got_frame_ptr = 1; | |
| 995 | |||
| 996 | 586 | return buf_size; | |
| 997 | |||
| 998 | ✗ | fail: | |
| 999 | /* when error, we reset the bit reservoir */ | ||
| 1000 | ✗ | s->last_superframe_len = 0; | |
| 1001 | ✗ | return ret; | |
| 1002 | } | ||
| 1003 | |||
| 1004 | ✗ | static av_cold void flush(AVCodecContext *avctx) | |
| 1005 | { | ||
| 1006 | ✗ | WMACodecContext *s = avctx->priv_data; | |
| 1007 | |||
| 1008 | ✗ | s->last_bitoffset = | |
| 1009 | ✗ | s->last_superframe_len = 0; | |
| 1010 | |||
| 1011 | ✗ | s->eof_done = 0; | |
| 1012 | ✗ | avctx->internal->skip_samples = s->frame_len * 2; | |
| 1013 | ✗ | } | |
| 1014 | |||
| 1015 | #if CONFIG_WMAV1_DECODER | ||
| 1016 | const FFCodec ff_wmav1_decoder = { | ||
| 1017 | .p.name = "wmav1", | ||
| 1018 | CODEC_LONG_NAME("Windows Media Audio 1"), | ||
| 1019 | .p.type = AVMEDIA_TYPE_AUDIO, | ||
| 1020 | .p.id = AV_CODEC_ID_WMAV1, | ||
| 1021 | .priv_data_size = sizeof(WMACodecContext), | ||
| 1022 | .init = wma_decode_init, | ||
| 1023 | .close = ff_wma_end, | ||
| 1024 | FF_CODEC_DECODE_CB(wma_decode_superframe), | ||
| 1025 | .flush = flush, | ||
| 1026 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY, | ||
| 1027 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
| 1028 | }; | ||
| 1029 | #endif | ||
| 1030 | #if CONFIG_WMAV2_DECODER | ||
| 1031 | const FFCodec ff_wmav2_decoder = { | ||
| 1032 | .p.name = "wmav2", | ||
| 1033 | CODEC_LONG_NAME("Windows Media Audio 2"), | ||
| 1034 | .p.type = AVMEDIA_TYPE_AUDIO, | ||
| 1035 | .p.id = AV_CODEC_ID_WMAV2, | ||
| 1036 | .priv_data_size = sizeof(WMACodecContext), | ||
| 1037 | .init = wma_decode_init, | ||
| 1038 | .close = ff_wma_end, | ||
| 1039 | FF_CODEC_DECODE_CB(wma_decode_superframe), | ||
| 1040 | .flush = flush, | ||
| 1041 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY, | ||
| 1042 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
| 1043 | }; | ||
| 1044 | #endif | ||
| 1045 |