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1 | /* | ||
2 | * DV decoder | ||
3 | * Copyright (c) 2002 Fabrice Bellard | ||
4 | * Copyright (c) 2004 Roman Shaposhnik | ||
5 | * | ||
6 | * 50 Mbps (DVCPRO50) support | ||
7 | * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com> | ||
8 | * | ||
9 | * 100 Mbps (DVCPRO HD) support | ||
10 | * Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D) | ||
11 | * Final code by Roman Shaposhnik | ||
12 | * | ||
13 | * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth | ||
14 | * of DV technical info. | ||
15 | * | ||
16 | * This file is part of FFmpeg. | ||
17 | * | ||
18 | * FFmpeg is free software; you can redistribute it and/or | ||
19 | * modify it under the terms of the GNU Lesser General Public | ||
20 | * License as published by the Free Software Foundation; either | ||
21 | * version 2.1 of the License, or (at your option) any later version. | ||
22 | * | ||
23 | * FFmpeg is distributed in the hope that it will be useful, | ||
24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
26 | * Lesser General Public License for more details. | ||
27 | * | ||
28 | * You should have received a copy of the GNU Lesser General Public | ||
29 | * License along with FFmpeg; if not, write to the Free Software | ||
30 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
31 | */ | ||
32 | |||
33 | /** | ||
34 | * @file | ||
35 | * DV decoder | ||
36 | */ | ||
37 | |||
38 | #include "libavutil/avassert.h" | ||
39 | #include "libavutil/internal.h" | ||
40 | #include "libavutil/mem_internal.h" | ||
41 | #include "libavutil/thread.h" | ||
42 | |||
43 | #include "avcodec.h" | ||
44 | #include "codec_internal.h" | ||
45 | #include "decode.h" | ||
46 | #include "dv.h" | ||
47 | #include "dv_internal.h" | ||
48 | #include "dv_profile_internal.h" | ||
49 | #include "dvdata.h" | ||
50 | #include "get_bits.h" | ||
51 | #include "idctdsp.h" | ||
52 | #include "put_bits.h" | ||
53 | #include "simple_idct.h" | ||
54 | #include "thread.h" | ||
55 | |||
56 | typedef struct BlockInfo { | ||
57 | const uint32_t *factor_table; | ||
58 | const uint8_t *scan_table; | ||
59 | uint8_t pos; /* position in block */ | ||
60 | void (*idct_put)(uint8_t *dest, ptrdiff_t stride, int16_t *block); | ||
61 | uint8_t partial_bit_count; | ||
62 | uint32_t partial_bit_buffer; | ||
63 | int shift_offset; | ||
64 | } BlockInfo; | ||
65 | |||
66 | typedef struct DVDecContext { | ||
67 | const AVDVProfile *sys; | ||
68 | const AVFrame *frame; | ||
69 | const uint8_t *buf; | ||
70 | |||
71 | uint8_t dv_zigzag[2][64]; | ||
72 | DVwork_chunk work_chunks[4 * 12 * 27]; | ||
73 | uint32_t idct_factor[2 * 4 * 16 * 64]; | ||
74 | void (*idct_put[2])(uint8_t *dest, ptrdiff_t stride, int16_t *block); | ||
75 | |||
76 | IDCTDSPContext idsp; | ||
77 | } DVDecContext; | ||
78 | |||
79 | static const int dv_iweight_bits = 14; | ||
80 | |||
81 | static const uint16_t dv_iweight_88[64] = { | ||
82 | 32768, 16705, 16705, 17734, 17032, 17734, 18205, 18081, | ||
83 | 18081, 18205, 18725, 18562, 19195, 18562, 18725, 19266, | ||
84 | 19091, 19705, 19705, 19091, 19266, 21407, 19643, 20267, | ||
85 | 20228, 20267, 19643, 21407, 22725, 21826, 20853, 20806, | ||
86 | 20806, 20853, 21826, 22725, 23170, 23170, 21407, 21400, | ||
87 | 21407, 23170, 23170, 24598, 23786, 22018, 22018, 23786, | ||
88 | 24598, 25251, 24465, 22654, 24465, 25251, 25972, 25172, | ||
89 | 25172, 25972, 26722, 27969, 26722, 29692, 29692, 31521, | ||
90 | }; | ||
91 | static const uint16_t dv_iweight_248[64] = { | ||
92 | 32768, 16384, 16705, 16705, 17734, 17734, 17734, 17734, | ||
93 | 18081, 18081, 18725, 18725, 21407, 21407, 19091, 19091, | ||
94 | 19195, 19195, 18205, 18205, 18725, 18725, 19705, 19705, | ||
95 | 20267, 20267, 21826, 21826, 23170, 23170, 20806, 20806, | ||
96 | 20267, 20267, 19266, 19266, 21407, 21407, 20853, 20853, | ||
97 | 21400, 21400, 23786, 23786, 24465, 24465, 22018, 22018, | ||
98 | 23170, 23170, 22725, 22725, 24598, 24598, 24465, 24465, | ||
99 | 25172, 25172, 27969, 27969, 25972, 25972, 29692, 29692 | ||
100 | }; | ||
101 | |||
102 | /** | ||
103 | * The "inverse" DV100 weights are actually just the spec weights (zig-zagged). | ||
104 | */ | ||
105 | static const uint16_t dv_iweight_1080_y[64] = { | ||
106 | 128, 16, 16, 17, 17, 17, 18, 18, | ||
107 | 18, 18, 18, 18, 19, 18, 18, 19, | ||
108 | 19, 19, 19, 19, 19, 42, 38, 40, | ||
109 | 40, 40, 38, 42, 44, 43, 41, 41, | ||
110 | 41, 41, 43, 44, 45, 45, 42, 42, | ||
111 | 42, 45, 45, 48, 46, 43, 43, 46, | ||
112 | 48, 49, 48, 44, 48, 49, 101, 98, | ||
113 | 98, 101, 104, 109, 104, 116, 116, 123, | ||
114 | }; | ||
115 | static const uint16_t dv_iweight_1080_c[64] = { | ||
116 | 128, 16, 16, 17, 17, 17, 25, 25, | ||
117 | 25, 25, 26, 25, 26, 25, 26, 26, | ||
118 | 26, 27, 27, 26, 26, 42, 38, 40, | ||
119 | 40, 40, 38, 42, 44, 43, 41, 41, | ||
120 | 41, 41, 43, 44, 91, 91, 84, 84, | ||
121 | 84, 91, 91, 96, 93, 86, 86, 93, | ||
122 | 96, 197, 191, 177, 191, 197, 203, 197, | ||
123 | 197, 203, 209, 219, 209, 232, 232, 246, | ||
124 | }; | ||
125 | static const uint16_t dv_iweight_720_y[64] = { | ||
126 | 128, 16, 16, 17, 17, 17, 18, 18, | ||
127 | 18, 18, 18, 18, 19, 18, 18, 19, | ||
128 | 19, 19, 19, 19, 19, 42, 38, 40, | ||
129 | 40, 40, 38, 42, 44, 43, 41, 41, | ||
130 | 41, 41, 43, 44, 68, 68, 63, 63, | ||
131 | 63, 68, 68, 96, 92, 86, 86, 92, | ||
132 | 96, 98, 96, 88, 96, 98, 202, 196, | ||
133 | 196, 202, 208, 218, 208, 232, 232, 246, | ||
134 | }; | ||
135 | static const uint16_t dv_iweight_720_c[64] = { | ||
136 | 128, 24, 24, 26, 26, 26, 36, 36, | ||
137 | 36, 36, 36, 36, 38, 36, 36, 38, | ||
138 | 38, 38, 38, 38, 38, 84, 76, 80, | ||
139 | 80, 80, 76, 84, 88, 86, 82, 82, | ||
140 | 82, 82, 86, 88, 182, 182, 168, 168, | ||
141 | 168, 182, 182, 192, 186, 192, 172, 186, | ||
142 | 192, 394, 382, 354, 382, 394, 406, 394, | ||
143 | 394, 406, 418, 438, 418, 464, 464, 492, | ||
144 | }; | ||
145 | |||
146 | #define TEX_VLC_BITS 10 | ||
147 | |||
148 | /* XXX: also include quantization */ | ||
149 | static RL_VLC_ELEM dv_rl_vlc[1664]; | ||
150 | |||
151 | 34 | static av_cold void dv_init_static(void) | |
152 | { | ||
153 | 34 | VLCElem vlc_buf[FF_ARRAY_ELEMS(dv_rl_vlc)] = { 0 }; | |
154 | 34 | VLC dv_vlc = { .table = vlc_buf, .table_allocated = FF_ARRAY_ELEMS(vlc_buf) }; | |
155 | 34 | const unsigned offset = FF_ARRAY_ELEMS(dv_rl_vlc) - (2 * NB_DV_VLC - NB_DV_ZERO_LEVEL_ENTRIES); | |
156 | 34 | RL_VLC_ELEM *tmp = dv_rl_vlc + offset; | |
157 | int i, j; | ||
158 | |||
159 | /* it's faster to include sign bit in a generic VLC parsing scheme */ | ||
160 |
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13940 | for (i = 0, j = 0; i < NB_DV_VLC; i++, j++) { |
161 | 13906 | tmp[j].len = ff_dv_vlc_len[i]; | |
162 | 13906 | tmp[j].run = ff_dv_vlc_run[i]; | |
163 | 13906 | tmp[j].level = ff_dv_vlc_level[i]; | |
164 | |||
165 |
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13906 | if (ff_dv_vlc_level[i]) { |
166 | 11458 | tmp[j].len++; | |
167 | |||
168 | 11458 | j++; | |
169 | 11458 | tmp[j].len = ff_dv_vlc_len[i] + 1; | |
170 | 11458 | tmp[j].run = ff_dv_vlc_run[i]; | |
171 | 11458 | tmp[j].level = -ff_dv_vlc_level[i]; | |
172 | } | ||
173 | } | ||
174 | |||
175 | /* NOTE: as a trick, we use the fact the no codes are unused | ||
176 | * to accelerate the parsing of partial codes */ | ||
177 | 34 | ff_init_vlc_from_lengths(&dv_vlc, TEX_VLC_BITS, j, | |
178 | 34 | &tmp[0].len, sizeof(tmp[0]), | |
179 | NULL, 0, 0, 0, INIT_VLC_USE_NEW_STATIC, NULL); | ||
180 | av_assert1(dv_vlc.table_size == 1664); | ||
181 | |||
182 |
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56610 | for (int i = 0; i < dv_vlc.table_size; i++) { |
183 | 56576 | int code = dv_vlc.table[i].sym; | |
184 | 56576 | int len = dv_vlc.table[i].len; | |
185 | int level, run; | ||
186 | |||
187 |
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56576 | if (len < 0) { // more bits needed |
188 | 1088 | run = 0; | |
189 | 1088 | level = code; | |
190 | } else { | ||
191 | av_assert1(i <= code + offset); | ||
192 | 55488 | run = tmp[code].run + 1; | |
193 | 55488 | level = tmp[code].level; | |
194 | } | ||
195 | 56576 | dv_rl_vlc[i].len = len; | |
196 | 56576 | dv_rl_vlc[i].level = level; | |
197 | 56576 | dv_rl_vlc[i].run = run; | |
198 | } | ||
199 | 34 | } | |
200 | |||
201 | 58 | static void dv_init_weight_tables(DVDecContext *ctx, const AVDVProfile *d) | |
202 | { | ||
203 | int j, i, c, s; | ||
204 | 58 | uint32_t *factor1 = &ctx->idct_factor[0], | |
205 |
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58 | *factor2 = &ctx->idct_factor[DV_PROFILE_IS_HD(d) ? 4096 : 2816]; |
206 | |||
207 |
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58 | if (DV_PROFILE_IS_HD(d)) { |
208 | /* quantization quanta by QNO for DV100 */ | ||
209 | static const uint8_t dv100_qstep[16] = { | ||
210 | 1, /* QNO = 0 and 1 both have no quantization */ | ||
211 | 1, | ||
212 | 2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52 | ||
213 | }; | ||
214 | const uint16_t *iweight1, *iweight2; | ||
215 | |||
216 |
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17 | if (d->height == 720) { |
217 | 9 | iweight1 = &dv_iweight_720_y[0]; | |
218 | 9 | iweight2 = &dv_iweight_720_c[0]; | |
219 | } else { | ||
220 | 8 | iweight1 = &dv_iweight_1080_y[0]; | |
221 | 8 | iweight2 = &dv_iweight_1080_c[0]; | |
222 | } | ||
223 |
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85 | for (c = 0; c < 4; c++) { |
224 |
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1156 | for (s = 0; s < 16; s++) { |
225 |
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70720 | for (i = 0; i < 64; i++) { |
226 | 69632 | *factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i]; | |
227 | 69632 | *factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i]; | |
228 | } | ||
229 | } | ||
230 | } | ||
231 | } else { | ||
232 | static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 }; | ||
233 | 41 | const uint16_t *iweight1 = &dv_iweight_88[0]; | |
234 |
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123 | for (j = 0; j < 2; j++, iweight1 = &dv_iweight_248[0]) { |
235 |
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1886 | for (s = 0; s < 22; s++) { |
236 |
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9020 | for (i = c = 0; c < 4; c++) { |
237 |
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122672 | for (; i < dv_quant_areas[c]; i++) { |
238 | 115456 | *factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1); | |
239 | 115456 | *factor2++ = (*factor1++) << 1; | |
240 | } | ||
241 | } | ||
242 | } | ||
243 | } | ||
244 | } | ||
245 | 58 | } | |
246 | |||
247 | 60 | static av_cold int dvvideo_decode_init(AVCodecContext *avctx) | |
248 | { | ||
249 | static AVOnce init_static_once = AV_ONCE_INIT; | ||
250 | 60 | DVDecContext *s = avctx->priv_data; | |
251 | int i; | ||
252 | |||
253 | 60 | avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; | |
254 | |||
255 | 60 | ff_idctdsp_init(&s->idsp, avctx); | |
256 | |||
257 |
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3900 | for (i = 0; i < 64; i++) |
258 | 3840 | s->dv_zigzag[0][i] = s->idsp.idct_permutation[ff_zigzag_direct[i]]; | |
259 | |||
260 |
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60 | if (avctx->lowres){ |
261 | ✗ | for (i = 0; i < 64; i++){ | |
262 | ✗ | int j = ff_dv_zigzag248_direct[i]; | |
263 | ✗ | s->dv_zigzag[1][i] = s->idsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2]; | |
264 | } | ||
265 | }else | ||
266 | 60 | memcpy(s->dv_zigzag[1], ff_dv_zigzag248_direct, sizeof(s->dv_zigzag[1])); | |
267 | |||
268 | 60 | s->idct_put[0] = s->idsp.idct_put; | |
269 | 60 | s->idct_put[1] = ff_simple_idct248_put; | |
270 | |||
271 | 60 | ff_thread_once(&init_static_once, dv_init_static); | |
272 | |||
273 | 60 | return 0; | |
274 | } | ||
275 | |||
276 | /* decode AC coefficients */ | ||
277 | 30597572 | static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, int16_t *block) | |
278 | { | ||
279 | 30597572 | int last_index = gb->size_in_bits; | |
280 | 30597572 | const uint8_t *scan_table = mb->scan_table; | |
281 | 30597572 | const uint32_t *factor_table = mb->factor_table; | |
282 | 30597572 | int pos = mb->pos; | |
283 | 30597572 | int partial_bit_count = mb->partial_bit_count; | |
284 | int level, run, vlc_len, index; | ||
285 | |||
286 | 30597572 | OPEN_READER_NOSIZE(re, gb); | |
287 | 30597572 | UPDATE_CACHE(re, gb); | |
288 | |||
289 | /* if we must parse a partial VLC, we do it here */ | ||
290 |
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30597572 | if (partial_bit_count > 0) { |
291 | 7006249 | re_cache = re_cache >> partial_bit_count | | |
292 | 7006249 | mb->partial_bit_buffer; | |
293 | 7006249 | re_index -= partial_bit_count; | |
294 | 7006249 | mb->partial_bit_count = 0; | |
295 | } | ||
296 | |||
297 | /* get the AC coefficients until last_index is reached */ | ||
298 | for (;;) { | ||
299 | 205743711 | ff_dlog(NULL, "%2d: bits=%04"PRIx32" index=%u\n", | |
300 | pos, SHOW_UBITS(re, gb, 16), re_index); | ||
301 | /* our own optimized GET_RL_VLC */ | ||
302 | 236341283 | index = NEG_USR32(re_cache, TEX_VLC_BITS); | |
303 | 236341283 | vlc_len = dv_rl_vlc[index].len; | |
304 |
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236341283 | if (vlc_len < 0) { |
305 | 18065775 | index = NEG_USR32((unsigned) re_cache << TEX_VLC_BITS, -vlc_len) + | |
306 | 18065775 | dv_rl_vlc[index].level; | |
307 | 18065775 | vlc_len = TEX_VLC_BITS - vlc_len; | |
308 | } | ||
309 | 236341283 | level = dv_rl_vlc[index].level; | |
310 | 236341283 | run = dv_rl_vlc[index].run; | |
311 | |||
312 | /* gotta check if we're still within gb boundaries */ | ||
313 |
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236341283 | if (re_index + vlc_len > last_index) { |
314 | /* should be < 16 bits otherwise a codeword could have been parsed */ | ||
315 | 8401374 | mb->partial_bit_count = last_index - re_index; | |
316 | 8401374 | mb->partial_bit_buffer = re_cache & ~(-1u >> mb->partial_bit_count); | |
317 | 8401374 | re_index = last_index; | |
318 | 8401374 | break; | |
319 | } | ||
320 | 227939909 | re_index += vlc_len; | |
321 | |||
322 | ff_dlog(NULL, "run=%d level=%d\n", run, level); | ||
323 | 227939909 | pos += run; | |
324 |
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227939909 | if (pos >= 64) |
325 | 22196198 | break; | |
326 | |||
327 | 205743711 | level = (level * factor_table[pos] + (1 << (dv_iweight_bits - 1))) >> | |
328 | dv_iweight_bits; | ||
329 | 205743711 | block[scan_table[pos]] = level; | |
330 | |||
331 | 205743711 | UPDATE_CACHE(re, gb); | |
332 | } | ||
333 | 30597572 | CLOSE_READER(re, gb); | |
334 | 30597572 | mb->pos = pos; | |
335 | 30597572 | } | |
336 | |||
337 | 16904140 | static inline void bit_copy(PutBitContext *pb, GetBitContext *gb) | |
338 | { | ||
339 | 16904140 | int bits_left = get_bits_left(gb); | |
340 |
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53568356 | while (bits_left >= MIN_CACHE_BITS) { |
341 | 36664216 | put_bits(pb, MIN_CACHE_BITS, get_bits(gb, MIN_CACHE_BITS)); | |
342 | 36664216 | bits_left -= MIN_CACHE_BITS; | |
343 | } | ||
344 |
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16904140 | if (bits_left > 0) |
345 | 16344707 | put_bits(pb, bits_left, get_bits(gb, bits_left)); | |
346 | 16904140 | } | |
347 | |||
348 | ✗ | static av_always_inline void put_block_8x4(int16_t *block, uint8_t *av_restrict p, int stride) | |
349 | { | ||
350 | int i, j; | ||
351 | |||
352 | ✗ | for (i = 0; i < 4; i++) { | |
353 | ✗ | for (j = 0; j < 8; j++) | |
354 | ✗ | p[j] = av_clip_uint8(block[j]); | |
355 | ✗ | block += 8; | |
356 | ✗ | p += stride; | |
357 | } | ||
358 | } | ||
359 | |||
360 | ✗ | static void dv100_idct_put_last_row_field_chroma(const DVDecContext *s, uint8_t *data, | |
361 | int stride, int16_t *blocks) | ||
362 | { | ||
363 | ✗ | s->idsp.idct(blocks + 0*64); | |
364 | ✗ | s->idsp.idct(blocks + 1*64); | |
365 | |||
366 | ✗ | put_block_8x4(blocks+0*64, data, stride<<1); | |
367 | ✗ | put_block_8x4(blocks+0*64 + 4*8, data + 8, stride<<1); | |
368 | ✗ | put_block_8x4(blocks+1*64, data + stride, stride<<1); | |
369 | ✗ | put_block_8x4(blocks+1*64 + 4*8, data + 8 + stride, stride<<1); | |
370 | } | ||
371 | |||
372 | ✗ | static void dv100_idct_put_last_row_field_luma(const DVDecContext *s, uint8_t *data, | |
373 | int stride, int16_t *blocks) | ||
374 | { | ||
375 | ✗ | s->idsp.idct(blocks + 0*64); | |
376 | ✗ | s->idsp.idct(blocks + 1*64); | |
377 | ✗ | s->idsp.idct(blocks + 2*64); | |
378 | ✗ | s->idsp.idct(blocks + 3*64); | |
379 | |||
380 | ✗ | put_block_8x4(blocks+0*64, data, stride<<1); | |
381 | ✗ | put_block_8x4(blocks+0*64 + 4*8, data + 16, stride<<1); | |
382 | ✗ | put_block_8x4(blocks+1*64, data + 8, stride<<1); | |
383 | ✗ | put_block_8x4(blocks+1*64 + 4*8, data + 24, stride<<1); | |
384 | ✗ | put_block_8x4(blocks+2*64, data + stride, stride<<1); | |
385 | ✗ | put_block_8x4(blocks+2*64 + 4*8, data + 16 + stride, stride<<1); | |
386 | ✗ | put_block_8x4(blocks+3*64, data + 8 + stride, stride<<1); | |
387 | ✗ | put_block_8x4(blocks+3*64 + 4*8, data + 24 + stride, stride<<1); | |
388 | } | ||
389 | |||
390 | /* mb_x and mb_y are in units of 8 pixels */ | ||
391 | 620568 | static int dv_decode_video_segment(AVCodecContext *avctx, void *arg) | |
392 | { | ||
393 | 620568 | const DVDecContext *s = avctx->priv_data; | |
394 | 620568 | DVwork_chunk *work_chunk = arg; | |
395 | int quant, dc, dct_mode, class1, j; | ||
396 | int mb_index, mb_x, mb_y, last_index; | ||
397 | int y_stride, linesize; | ||
398 | int16_t *block, *block1; | ||
399 | int c_offset; | ||
400 | uint8_t *y_ptr; | ||
401 | const uint8_t *buf_ptr; | ||
402 | PutBitContext pb, vs_pb; | ||
403 | GetBitContext gb; | ||
404 | BlockInfo mb_data[5 * DV_MAX_BPM], *mb, *mb1; | ||
405 | 620568 | LOCAL_ALIGNED_16(int16_t, sblock, [5 * DV_MAX_BPM], [64]); | |
406 | 620568 | LOCAL_ALIGNED_16(uint8_t, mb_bit_buffer, [80 + AV_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */ | |
407 | 620568 | LOCAL_ALIGNED_16(uint8_t, vs_bit_buffer, [80 * 5 + AV_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */ | |
408 | 620568 | const int log2_blocksize = 3 - avctx->lowres; | |
409 | int is_field_mode[5]; | ||
410 | 620568 | int vs_bit_buffer_damaged = 0; | |
411 | 620568 | int mb_bit_buffer_damaged[5] = {0}; | |
412 | 620568 | int retried = 0; | |
413 | int sta; | ||
414 | |||
415 | av_assert1((((uintptr_t) mb_bit_buffer) & 7) == 0); | ||
416 | av_assert1((((uintptr_t) vs_bit_buffer) & 7) == 0); | ||
417 | |||
418 | 620569 | retry: | |
419 | |||
420 | 620569 | memset(sblock, 0, 5 * DV_MAX_BPM * sizeof(*sblock)); | |
421 | |||
422 | /* pass 1: read DC and AC coefficients in blocks */ | ||
423 | 620569 | buf_ptr = &s->buf[work_chunk->buf_offset * 80]; | |
424 | 620569 | block1 = &sblock[0][0]; | |
425 | 620569 | mb1 = mb_data; | |
426 | 620569 | init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80); | |
427 |
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3723414 | for (mb_index = 0; mb_index < 5; mb_index++, mb1 += s->sys->bpm, block1 += s->sys->bpm * 64) { |
428 | /* skip header */ | ||
429 | 3102845 | quant = buf_ptr[3] & 0x0f; | |
430 |
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3102845 | if (avctx->error_concealment) { |
431 |
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3102845 | if ((buf_ptr[3] >> 4) == 0x0E) |
432 | ✗ | vs_bit_buffer_damaged = 1; | |
433 |
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3102845 | if (!mb_index) { |
434 | 620569 | sta = buf_ptr[3] >> 4; | |
435 |
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2482276 | } else if (sta != (buf_ptr[3] >> 4)) |
436 | ✗ | vs_bit_buffer_damaged = 1; | |
437 | } | ||
438 | 3102845 | buf_ptr += 4; | |
439 | 3102845 | init_put_bits(&pb, mb_bit_buffer, 80); | |
440 | 3102845 | mb = mb1; | |
441 | 3102845 | block = block1; | |
442 | 3102845 | is_field_mode[mb_index] = 0; | |
443 |
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25305515 | for (j = 0; j < s->sys->bpm; j++) { |
444 | 22202670 | last_index = s->sys->block_sizes[j]; | |
445 | 22202670 | init_get_bits(&gb, buf_ptr, last_index); | |
446 | |||
447 | /* get the DC */ | ||
448 | 22202670 | dc = get_sbits(&gb, 9); | |
449 | 22202670 | dct_mode = get_bits1(&gb); | |
450 | 22202670 | class1 = get_bits(&gb, 2); | |
451 |
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22202670 | if (DV_PROFILE_IS_HD(s->sys)) { |
452 | 14342400 | mb->idct_put = s->idct_put[0]; | |
453 | 14342400 | mb->scan_table = s->dv_zigzag[0]; | |
454 |
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14342400 | mb->factor_table = &s->idct_factor[(j >= 4) * 4 * 16 * 64 + |
455 | 14342400 | class1 * 16 * 64 + | |
456 | 14342400 | quant * 64]; | |
457 |
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14342400 | is_field_mode[mb_index] |= !j && dct_mode; |
458 | } else { | ||
459 |
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7860270 | mb->idct_put = s->idct_put[dct_mode && log2_blocksize == 3]; |
460 | 7860270 | mb->scan_table = s->dv_zigzag[dct_mode]; | |
461 | 7860270 | mb->factor_table = | |
462 |
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7860270 | &s->idct_factor[(class1 == 3) * 2 * 22 * 64 + |
463 | 7860270 | dct_mode * 22 * 64 + | |
464 | 7860270 | (quant + ff_dv_quant_offset[class1]) * 64]; | |
465 | } | ||
466 | 22202670 | dc = dc * 4; | |
467 | /* convert to unsigned because 128 is not added in the | ||
468 | * standard IDCT */ | ||
469 | 22202670 | dc += 1024; | |
470 | 22202670 | block[0] = dc; | |
471 | 22202670 | buf_ptr += last_index >> 3; | |
472 | 22202670 | mb->pos = 0; | |
473 | 22202670 | mb->partial_bit_count = 0; | |
474 | |||
475 | ff_dlog(avctx, "MB block: %d, %d ", mb_index, j); | ||
476 | 22202670 | dv_decode_ac(&gb, mb, block); | |
477 | |||
478 | /* write the remaining bits in a new buffer only if the | ||
479 | * block is finished */ | ||
480 |
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22202670 | if (mb->pos >= 64) |
481 | 14800193 | bit_copy(&pb, &gb); | |
482 |
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22202670 | if (mb->pos >= 64 && mb->pos < 127) |
483 | ✗ | vs_bit_buffer_damaged = mb_bit_buffer_damaged[mb_index] = 1; | |
484 | |||
485 | 22202670 | block += 64; | |
486 | 22202670 | mb++; | |
487 | } | ||
488 | |||
489 |
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3102845 | if (mb_bit_buffer_damaged[mb_index] > 0) |
490 | 1 | continue; | |
491 | |||
492 | /* pass 2: we can do it just after */ | ||
493 | ff_dlog(avctx, "***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index); | ||
494 | 3102844 | block = block1; | |
495 | 3102844 | mb = mb1; | |
496 | 3102844 | init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb)); | |
497 | 3102844 | put_bits32(&pb, 0); // padding must be zeroed | |
498 | 3102844 | flush_put_bits(&pb); | |
499 |
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19841303 | for (j = 0; j < s->sys->bpm; j++, block += 64, mb++) { |
500 |
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17737356 | if (mb->pos < 64 && get_bits_left(&gb) > 0) { |
501 | 4506592 | dv_decode_ac(&gb, mb, block); | |
502 | /* if still not finished, no need to parse other blocks */ | ||
503 |
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4506592 | if (mb->pos < 64) |
504 | 998897 | break; | |
505 |
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3507695 | if (mb->pos < 127) |
506 | 2 | vs_bit_buffer_damaged = mb_bit_buffer_damaged[mb_index] = 1; | |
507 | } | ||
508 | } | ||
509 | /* all blocks are finished, so the extra bytes can be used at | ||
510 | * the video segment level */ | ||
511 |
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3102844 | if (j >= s->sys->bpm) |
512 | 2103947 | bit_copy(&vs_pb, &gb); | |
513 | } | ||
514 | |||
515 | /* we need a pass over the whole video segment */ | ||
516 | ff_dlog(avctx, "***pass 3 size=%d\n", put_bits_count(&vs_pb)); | ||
517 | 620569 | block = &sblock[0][0]; | |
518 | 620569 | mb = mb_data; | |
519 | 620569 | init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb)); | |
520 | 620569 | put_bits32(&vs_pb, 0); // padding must be zeroed | |
521 | 620569 | flush_put_bits(&vs_pb); | |
522 |
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3723414 | for (mb_index = 0; mb_index < 5; mb_index++) { |
523 |
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25305515 | for (j = 0; j < s->sys->bpm; j++) { |
524 |
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22202670 | if (mb->pos < 64 && get_bits_left(&gb) > 0 && !vs_bit_buffer_damaged) { |
525 | ff_dlog(avctx, "start %d:%d\n", mb_index, j); | ||
526 | 3888310 | dv_decode_ac(&gb, mb, block); | |
527 | } | ||
528 | |||
529 |
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22202670 | if (mb->pos >= 64 && mb->pos < 127) { |
530 | 2 | av_log(avctx, AV_LOG_ERROR, | |
531 | 2 | "AC EOB marker is absent pos=%d\n", mb->pos); | |
532 | 2 | vs_bit_buffer_damaged = 1; | |
533 | } | ||
534 | 22202670 | block += 64; | |
535 | 22202670 | mb++; | |
536 | } | ||
537 | } | ||
538 |
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620569 | if (vs_bit_buffer_damaged && !retried) { |
539 | 1 | av_log(avctx, AV_LOG_ERROR, "Concealing bitstream errors\n"); | |
540 | 1 | retried = 1; | |
541 | 1 | goto retry; | |
542 | } | ||
543 | |||
544 | /* compute idct and place blocks */ | ||
545 | 620568 | block = &sblock[0][0]; | |
546 | 620568 | mb = mb_data; | |
547 |
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3723408 | for (mb_index = 0; mb_index < 5; mb_index++) { |
548 | 3102840 | dv_calculate_mb_xy(s->sys, s->buf, work_chunk, mb_index, &mb_x, &mb_y); | |
549 | |||
550 | /* idct_put'ting luminance */ | ||
551 |
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3102840 | if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) || |
552 |
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2680020 | (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) || |
553 |
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2673336 | (s->sys->height >= 720 && mb_y != 134)) { |
554 | 2213124 | y_stride = (s->frame->linesize[0] << | |
555 | 2213124 | ((!is_field_mode[mb_index]) * log2_blocksize)); | |
556 | } else { | ||
557 | 889716 | y_stride = (2 << log2_blocksize); | |
558 | } | ||
559 | 3102840 | y_ptr = s->frame->data[0] + | |
560 | 3102840 | ((mb_y * s->frame->linesize[0] + mb_x) << log2_blocksize); | |
561 |
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3102840 | if (mb_y == 134 && is_field_mode[mb_index]) { |
562 | ✗ | dv100_idct_put_last_row_field_luma(s, y_ptr, s->frame->linesize[0], block); | |
563 | } else { | ||
564 | 3102840 | linesize = s->frame->linesize[0] << is_field_mode[mb_index]; | |
565 | 3102840 | mb[0].idct_put(y_ptr, linesize, block + 0 * 64); | |
566 |
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3102840 | if (s->sys->video_stype == 4) { /* SD 422 */ |
567 | 586440 | mb[2].idct_put(y_ptr + (1 << log2_blocksize), linesize, block + 2 * 64); | |
568 | } else { | ||
569 | 2516400 | mb[1].idct_put(y_ptr + (1 << log2_blocksize), linesize, block + 1 * 64); | |
570 | 2516400 | mb[2].idct_put(y_ptr + y_stride, linesize, block + 2 * 64); | |
571 | 2516400 | mb[3].idct_put(y_ptr + (1 << log2_blocksize) + y_stride, linesize, block + 3 * 64); | |
572 | } | ||
573 | } | ||
574 | 3102840 | mb += 4; | |
575 | 3102840 | block += 4 * 64; | |
576 | |||
577 | /* idct_put'ting chrominance */ | ||
578 | 6205680 | c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] + | |
579 |
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3102840 | (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << log2_blocksize); |
580 |
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9308520 | for (j = 2; j; j--) { |
581 | 6205680 | uint8_t *c_ptr = s->frame->data[j] + c_offset; | |
582 |
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6205680 | if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) { |
583 | uint64_t aligned_pixels[64 / 8]; | ||
584 | 13368 | uint8_t *pixels = (uint8_t *) aligned_pixels; | |
585 | uint8_t *c_ptr1, *ptr1; | ||
586 | int x, y; | ||
587 | 13368 | mb->idct_put(pixels, 8, block); | |
588 |
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120312 | for (y = 0; y < (1 << log2_blocksize); y++, c_ptr += s->frame->linesize[j], pixels += 8) { |
589 | 106944 | ptr1 = pixels + ((1 << (log2_blocksize))>>1); | |
590 | 106944 | c_ptr1 = c_ptr + (s->frame->linesize[j] << log2_blocksize); | |
591 |
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534720 | for (x = 0; x < (1 << FFMAX(log2_blocksize - 1, 0)); x++) { |
592 | 427776 | c_ptr[x] = pixels[x]; | |
593 | 427776 | c_ptr1[x] = ptr1[x]; | |
594 | } | ||
595 | } | ||
596 | 13368 | block += 64; | |
597 | 13368 | mb++; | |
598 | } else { | ||
599 |
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6192312 | y_stride = (mb_y == 134) ? (1 << log2_blocksize) : |
600 | 6173952 | s->frame->linesize[j] << ((!is_field_mode[mb_index]) * log2_blocksize); | |
601 |
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6192312 | if (mb_y == 134 && is_field_mode[mb_index]) { |
602 | ✗ | dv100_idct_put_last_row_field_chroma(s, c_ptr, s->frame->linesize[j], block); | |
603 | ✗ | mb += 2; | |
604 | ✗ | block += 2*64; | |
605 | } else { | ||
606 | 6192312 | linesize = s->frame->linesize[j] << is_field_mode[mb_index]; | |
607 | 6192312 | (mb++)->idct_put(c_ptr, linesize, block); | |
608 | 6192312 | block += 64; | |
609 |
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6192312 | if (s->sys->bpm == 8) { |
610 | 3585600 | (mb++)->idct_put(c_ptr + y_stride, linesize, block); | |
611 | 3585600 | block += 64; | |
612 | } | ||
613 | } | ||
614 | } | ||
615 | } | ||
616 | } | ||
617 | 620568 | return 0; | |
618 | } | ||
619 | |||
620 | /* NOTE: exactly one frame must be given (120000 bytes for NTSC, | ||
621 | * 144000 bytes for PAL - or twice those for 50Mbps) */ | ||
622 | 1043 | static int dvvideo_decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
623 | int *got_frame, AVPacket *avpkt) | ||
624 | { | ||
625 | 1043 | uint8_t *buf = avpkt->data; | |
626 | 1043 | int buf_size = avpkt->size; | |
627 | 1043 | DVDecContext *s = avctx->priv_data; | |
628 | const uint8_t *vsc_pack; | ||
629 | int apt, is16_9, ret; | ||
630 | const AVDVProfile *sys; | ||
631 | |||
632 | 1043 | sys = ff_dv_frame_profile(avctx, s->sys, buf, buf_size); | |
633 |
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1043 | if (!sys || buf_size < sys->frame_size) { |
634 | ✗ | av_log(avctx, AV_LOG_ERROR, "could not find dv frame profile\n"); | |
635 | ✗ | return -1; /* NOTE: we only accept several full frames */ | |
636 | } | ||
637 | |||
638 |
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1043 | if (sys != s->sys) { |
639 | 58 | ret = ff_dv_init_dynamic_tables(s->work_chunks, sys); | |
640 |
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58 | if (ret < 0) { |
641 | ✗ | av_log(avctx, AV_LOG_ERROR, "Error initializing the work tables.\n"); | |
642 | ✗ | return ret; | |
643 | } | ||
644 | 58 | dv_init_weight_tables(s, sys); | |
645 | 58 | s->sys = sys; | |
646 | } | ||
647 | |||
648 | 1043 | s->frame = frame; | |
649 | 1043 | frame->key_frame = 1; | |
650 | 1043 | frame->pict_type = AV_PICTURE_TYPE_I; | |
651 | 1043 | avctx->pix_fmt = s->sys->pix_fmt; | |
652 | 1043 | avctx->framerate = av_inv_q(s->sys->time_base); | |
653 | |||
654 | 1043 | ret = ff_set_dimensions(avctx, s->sys->width, s->sys->height); | |
655 |
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1043 | if (ret < 0) |
656 | ✗ | return ret; | |
657 | |||
658 | /* Determine the codec's sample_aspect ratio from the packet */ | ||
659 | 1043 | vsc_pack = buf + 80 * 5 + 48 + 5; | |
660 |
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1043 | if (*vsc_pack == DV_VIDEO_CONTROL) { |
661 | 1043 | apt = buf[4] & 0x07; | |
662 |
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1312 | is16_9 = (vsc_pack[2] & 0x07) == 0x02 || |
663 |
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269 | (!apt && (vsc_pack[2] & 0x07) == 0x07); |
664 | 1043 | ff_set_sar(avctx, s->sys->sar[is16_9]); | |
665 | } | ||
666 | |||
667 |
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1043 | if ((ret = ff_thread_get_buffer(avctx, frame, 0)) < 0) |
668 | ✗ | return ret; | |
669 | |||
670 | /* Determine the codec's field order from the packet */ | ||
671 |
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1043 | if ( *vsc_pack == DV_VIDEO_CONTROL ) { |
672 |
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1043 | if (avctx->height == 720) { |
673 | 205 | frame->interlaced_frame = 0; | |
674 | 205 | frame->top_field_first = 0; | |
675 |
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838 | } else if (avctx->height == 1080) { |
676 | 204 | frame->interlaced_frame = 1; | |
677 | 204 | frame->top_field_first = (vsc_pack[3] & 0x40) == 0x40; | |
678 | } else { | ||
679 | 634 | frame->interlaced_frame = (vsc_pack[3] & 0x10) == 0x10; | |
680 | 634 | frame->top_field_first = !(vsc_pack[3] & 0x40); | |
681 | } | ||
682 | } | ||
683 | |||
684 | 1043 | s->buf = buf; | |
685 | 1043 | avctx->execute(avctx, dv_decode_video_segment, s->work_chunks, NULL, | |
686 | dv_work_pool_size(s->sys), sizeof(DVwork_chunk)); | ||
687 | |||
688 | 1043 | emms_c(); | |
689 | |||
690 | /* return image */ | ||
691 | 1043 | *got_frame = 1; | |
692 | |||
693 | 1043 | return s->sys->frame_size; | |
694 | } | ||
695 | |||
696 | const FFCodec ff_dvvideo_decoder = { | ||
697 | .p.name = "dvvideo", | ||
698 | CODEC_LONG_NAME("DV (Digital Video)"), | ||
699 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
700 | .p.id = AV_CODEC_ID_DVVIDEO, | ||
701 | .priv_data_size = sizeof(DVDecContext), | ||
702 | .init = dvvideo_decode_init, | ||
703 | FF_CODEC_DECODE_CB(dvvideo_decode_frame), | ||
704 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS, | ||
705 | .p.max_lowres = 3, | ||
706 | }; | ||
707 |