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2ba45a60 DM |
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/imgutils.h" | |
40 | #include "libavutil/internal.h" | |
41 | #include "libavutil/pixdesc.h" | |
42 | ||
43 | #include "avcodec.h" | |
44 | #include "dv.h" | |
f6fa7814 | 45 | #include "dv_profile_internal.h" |
2ba45a60 DM |
46 | #include "dvdata.h" |
47 | #include "get_bits.h" | |
48 | #include "idctdsp.h" | |
49 | #include "internal.h" | |
50 | #include "put_bits.h" | |
51 | #include "simple_idct.h" | |
52 | ||
53 | typedef struct BlockInfo { | |
54 | const uint32_t *factor_table; | |
55 | const uint8_t *scan_table; | |
56 | uint8_t pos; /* position in block */ | |
57 | void (*idct_put)(uint8_t *dest, int line_size, int16_t *block); | |
58 | uint8_t partial_bit_count; | |
59 | uint32_t partial_bit_buffer; | |
60 | int shift_offset; | |
61 | } BlockInfo; | |
62 | ||
63 | static const int dv_iweight_bits = 14; | |
64 | ||
f6fa7814 DM |
65 | static const uint16_t dv_iweight_88[64] = { |
66 | 32768, 16705, 16705, 17734, 17032, 17734, 18205, 18081, | |
67 | 18081, 18205, 18725, 18562, 19195, 18562, 18725, 19266, | |
68 | 19091, 19705, 19705, 19091, 19266, 21407, 19643, 20267, | |
69 | 20228, 20267, 19643, 21407, 22725, 21826, 20853, 20806, | |
70 | 20806, 20853, 21826, 22725, 23170, 23170, 21407, 21400, | |
71 | 21407, 23170, 23170, 24598, 23786, 22018, 22018, 23786, | |
72 | 24598, 25251, 24465, 22654, 24465, 25251, 25972, 25172, | |
73 | 25172, 25972, 26722, 27969, 26722, 29692, 29692, 31521, | |
74 | }; | |
75 | static const uint16_t dv_iweight_248[64] = { | |
76 | 32768, 16384, 16705, 16705, 17734, 17734, 17734, 17734, | |
77 | 18081, 18081, 18725, 18725, 21407, 21407, 19091, 19091, | |
78 | 19195, 19195, 18205, 18205, 18725, 18725, 19705, 19705, | |
79 | 20267, 20267, 21826, 21826, 23170, 23170, 20806, 20806, | |
80 | 20267, 20267, 19266, 19266, 21407, 21407, 20853, 20853, | |
81 | 21400, 21400, 23786, 23786, 24465, 24465, 22018, 22018, | |
82 | 23170, 23170, 22725, 22725, 24598, 24598, 24465, 24465, | |
83 | 25172, 25172, 27969, 27969, 25972, 25972, 29692, 29692 | |
84 | }; | |
85 | ||
86 | /** | |
87 | * The "inverse" DV100 weights are actually just the spec weights (zig-zagged). | |
88 | */ | |
89 | static const uint16_t dv_iweight_1080_y[64] = { | |
90 | 128, 16, 16, 17, 17, 17, 18, 18, | |
91 | 18, 18, 18, 18, 19, 18, 18, 19, | |
92 | 19, 19, 19, 19, 19, 42, 38, 40, | |
93 | 40, 40, 38, 42, 44, 43, 41, 41, | |
94 | 41, 41, 43, 44, 45, 45, 42, 42, | |
95 | 42, 45, 45, 48, 46, 43, 43, 46, | |
96 | 48, 49, 48, 44, 48, 49, 101, 98, | |
97 | 98, 101, 104, 109, 104, 116, 116, 123, | |
98 | }; | |
99 | static const uint16_t dv_iweight_1080_c[64] = { | |
100 | 128, 16, 16, 17, 17, 17, 25, 25, | |
101 | 25, 25, 26, 25, 26, 25, 26, 26, | |
102 | 26, 27, 27, 26, 26, 42, 38, 40, | |
103 | 40, 40, 38, 42, 44, 43, 41, 41, | |
104 | 41, 41, 43, 44, 91, 91, 84, 84, | |
105 | 84, 91, 91, 96, 93, 86, 86, 93, | |
106 | 96, 197, 191, 177, 191, 197, 203, 197, | |
107 | 197, 203, 209, 219, 209, 232, 232, 246, | |
108 | }; | |
109 | static const uint16_t dv_iweight_720_y[64] = { | |
110 | 128, 16, 16, 17, 17, 17, 18, 18, | |
111 | 18, 18, 18, 18, 19, 18, 18, 19, | |
112 | 19, 19, 19, 19, 19, 42, 38, 40, | |
113 | 40, 40, 38, 42, 44, 43, 41, 41, | |
114 | 41, 41, 43, 44, 68, 68, 63, 63, | |
115 | 63, 68, 68, 96, 92, 86, 86, 92, | |
116 | 96, 98, 96, 88, 96, 98, 202, 196, | |
117 | 196, 202, 208, 218, 208, 232, 232, 246, | |
118 | }; | |
119 | const uint16_t dv_iweight_720_c[64] = { | |
120 | 128, 24, 24, 26, 26, 26, 36, 36, | |
121 | 36, 36, 36, 36, 38, 36, 36, 38, | |
122 | 38, 38, 38, 38, 38, 84, 76, 80, | |
123 | 80, 80, 76, 84, 88, 86, 82, 82, | |
124 | 82, 82, 86, 88, 182, 182, 168, 168, | |
125 | 168, 182, 182, 192, 186, 192, 172, 186, | |
126 | 192, 394, 382, 354, 382, 394, 406, 394, | |
127 | 394, 406, 418, 438, 418, 464, 464, 492, | |
128 | }; | |
129 | ||
130 | static void dv_init_weight_tables(DVVideoContext *ctx, const AVDVProfile *d) | |
131 | { | |
132 | int j, i, c, s; | |
133 | uint32_t *factor1 = &ctx->idct_factor[0], | |
134 | *factor2 = &ctx->idct_factor[DV_PROFILE_IS_HD(d) ? 4096 : 2816]; | |
135 | ||
136 | if (DV_PROFILE_IS_HD(d)) { | |
137 | /* quantization quanta by QNO for DV100 */ | |
138 | static const uint8_t dv100_qstep[16] = { | |
139 | 1, /* QNO = 0 and 1 both have no quantization */ | |
140 | 1, | |
141 | 2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52 | |
142 | }; | |
143 | const uint16_t *iweight1, *iweight2; | |
144 | ||
145 | if (d->height == 720) { | |
146 | iweight1 = &dv_iweight_720_y[0]; | |
147 | iweight2 = &dv_iweight_720_c[0]; | |
148 | } else { | |
149 | iweight1 = &dv_iweight_1080_y[0]; | |
150 | iweight2 = &dv_iweight_1080_c[0]; | |
151 | } | |
152 | for (c = 0; c < 4; c++) { | |
153 | for (s = 0; s < 16; s++) { | |
154 | for (i = 0; i < 64; i++) { | |
155 | *factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i]; | |
156 | *factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i]; | |
157 | } | |
158 | } | |
159 | } | |
160 | } else { | |
161 | static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 }; | |
162 | const uint16_t *iweight1 = &dv_iweight_88[0]; | |
163 | for (j = 0; j < 2; j++, iweight1 = &dv_iweight_248[0]) { | |
164 | for (s = 0; s < 22; s++) { | |
165 | for (i = c = 0; c < 4; c++) { | |
166 | for (; i < dv_quant_areas[c]; i++) { | |
167 | *factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1); | |
168 | *factor2++ = (*factor1++) << 1; | |
169 | } | |
170 | } | |
171 | } | |
172 | } | |
173 | } | |
174 | } | |
175 | ||
2ba45a60 DM |
176 | static av_cold int dvvideo_decode_init(AVCodecContext *avctx) |
177 | { | |
178 | DVVideoContext *s = avctx->priv_data; | |
179 | IDCTDSPContext idsp; | |
180 | int i; | |
181 | ||
182 | memset(&idsp,0, sizeof(idsp)); | |
183 | ff_idctdsp_init(&idsp, avctx); | |
184 | ||
185 | for (i = 0; i < 64; i++) | |
186 | s->dv_zigzag[0][i] = idsp.idct_permutation[ff_zigzag_direct[i]]; | |
187 | ||
188 | if (avctx->lowres){ | |
189 | for (i = 0; i < 64; i++){ | |
190 | int j = ff_dv_zigzag248_direct[i]; | |
191 | s->dv_zigzag[1][i] = idsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2]; | |
192 | } | |
193 | }else | |
194 | memcpy(s->dv_zigzag[1], ff_dv_zigzag248_direct, sizeof(s->dv_zigzag[1])); | |
195 | ||
196 | s->idct_put[0] = idsp.idct_put; | |
197 | s->idct_put[1] = ff_simple_idct248_put; | |
198 | ||
199 | return ff_dvvideo_init(avctx); | |
200 | } | |
201 | ||
202 | /* decode AC coefficients */ | |
203 | static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, int16_t *block) | |
204 | { | |
205 | int last_index = gb->size_in_bits; | |
206 | const uint8_t *scan_table = mb->scan_table; | |
207 | const uint32_t *factor_table = mb->factor_table; | |
208 | int pos = mb->pos; | |
209 | int partial_bit_count = mb->partial_bit_count; | |
210 | int level, run, vlc_len, index; | |
211 | ||
212 | OPEN_READER_NOSIZE(re, gb); | |
213 | UPDATE_CACHE(re, gb); | |
214 | ||
215 | /* if we must parse a partial VLC, we do it here */ | |
216 | if (partial_bit_count > 0) { | |
217 | re_cache = re_cache >> partial_bit_count | | |
218 | mb->partial_bit_buffer; | |
219 | re_index -= partial_bit_count; | |
220 | mb->partial_bit_count = 0; | |
221 | } | |
222 | ||
223 | /* get the AC coefficients until last_index is reached */ | |
224 | for (;;) { | |
225 | av_dlog(NULL, "%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16), | |
226 | re_index); | |
227 | /* our own optimized GET_RL_VLC */ | |
228 | index = NEG_USR32(re_cache, TEX_VLC_BITS); | |
229 | vlc_len = ff_dv_rl_vlc[index].len; | |
230 | if (vlc_len < 0) { | |
231 | index = NEG_USR32((unsigned) re_cache << TEX_VLC_BITS, -vlc_len) + | |
232 | ff_dv_rl_vlc[index].level; | |
233 | vlc_len = TEX_VLC_BITS - vlc_len; | |
234 | } | |
235 | level = ff_dv_rl_vlc[index].level; | |
236 | run = ff_dv_rl_vlc[index].run; | |
237 | ||
238 | /* gotta check if we're still within gb boundaries */ | |
239 | if (re_index + vlc_len > last_index) { | |
240 | /* should be < 16 bits otherwise a codeword could have been parsed */ | |
241 | mb->partial_bit_count = last_index - re_index; | |
242 | mb->partial_bit_buffer = re_cache & ~(-1u >> mb->partial_bit_count); | |
243 | re_index = last_index; | |
244 | break; | |
245 | } | |
246 | re_index += vlc_len; | |
247 | ||
248 | av_dlog(NULL, "run=%d level=%d\n", run, level); | |
249 | pos += run; | |
250 | if (pos >= 64) | |
251 | break; | |
252 | ||
253 | level = (level * factor_table[pos] + (1 << (dv_iweight_bits - 1))) >> | |
254 | dv_iweight_bits; | |
255 | block[scan_table[pos]] = level; | |
256 | ||
257 | UPDATE_CACHE(re, gb); | |
258 | } | |
259 | CLOSE_READER(re, gb); | |
260 | mb->pos = pos; | |
261 | } | |
262 | ||
263 | static inline void bit_copy(PutBitContext *pb, GetBitContext *gb) | |
264 | { | |
265 | int bits_left = get_bits_left(gb); | |
266 | while (bits_left >= MIN_CACHE_BITS) { | |
267 | put_bits(pb, MIN_CACHE_BITS, get_bits(gb, MIN_CACHE_BITS)); | |
268 | bits_left -= MIN_CACHE_BITS; | |
269 | } | |
270 | if (bits_left > 0) | |
271 | put_bits(pb, bits_left, get_bits(gb, bits_left)); | |
272 | } | |
273 | ||
274 | /* mb_x and mb_y are in units of 8 pixels */ | |
275 | static int dv_decode_video_segment(AVCodecContext *avctx, void *arg) | |
276 | { | |
277 | DVVideoContext *s = avctx->priv_data; | |
278 | DVwork_chunk *work_chunk = arg; | |
279 | int quant, dc, dct_mode, class1, j; | |
280 | int mb_index, mb_x, mb_y, last_index; | |
281 | int y_stride, linesize; | |
282 | int16_t *block, *block1; | |
283 | int c_offset; | |
284 | uint8_t *y_ptr; | |
285 | const uint8_t *buf_ptr; | |
286 | PutBitContext pb, vs_pb; | |
287 | GetBitContext gb; | |
288 | BlockInfo mb_data[5 * DV_MAX_BPM], *mb, *mb1; | |
289 | LOCAL_ALIGNED_16(int16_t, sblock, [5 * DV_MAX_BPM], [64]); | |
290 | LOCAL_ALIGNED_16(uint8_t, mb_bit_buffer, [80 + FF_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */ | |
291 | LOCAL_ALIGNED_16(uint8_t, vs_bit_buffer, [80 * 5 + FF_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */ | |
292 | const int log2_blocksize = 3-s->avctx->lowres; | |
293 | int is_field_mode[5]; | |
294 | ||
295 | av_assert1((((int) mb_bit_buffer) & 7) == 0); | |
296 | av_assert1((((int) vs_bit_buffer) & 7) == 0); | |
297 | ||
298 | memset(sblock, 0, 5 * DV_MAX_BPM * sizeof(*sblock)); | |
299 | ||
300 | /* pass 1: read DC and AC coefficients in blocks */ | |
301 | buf_ptr = &s->buf[work_chunk->buf_offset * 80]; | |
302 | block1 = &sblock[0][0]; | |
303 | mb1 = mb_data; | |
304 | init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80); | |
305 | for (mb_index = 0; mb_index < 5; mb_index++, mb1 += s->sys->bpm, block1 += s->sys->bpm * 64) { | |
306 | /* skip header */ | |
307 | quant = buf_ptr[3] & 0x0f; | |
308 | buf_ptr += 4; | |
309 | init_put_bits(&pb, mb_bit_buffer, 80); | |
310 | mb = mb1; | |
311 | block = block1; | |
312 | is_field_mode[mb_index] = 0; | |
313 | for (j = 0; j < s->sys->bpm; j++) { | |
314 | last_index = s->sys->block_sizes[j]; | |
315 | init_get_bits(&gb, buf_ptr, last_index); | |
316 | ||
317 | /* get the DC */ | |
318 | dc = get_sbits(&gb, 9); | |
319 | dct_mode = get_bits1(&gb); | |
320 | class1 = get_bits(&gb, 2); | |
321 | if (DV_PROFILE_IS_HD(s->sys)) { | |
322 | mb->idct_put = s->idct_put[0]; | |
323 | mb->scan_table = s->dv_zigzag[0]; | |
324 | mb->factor_table = &s->idct_factor[(j >= 4) * 4 * 16 * 64 + | |
325 | class1 * 16 * 64 + | |
326 | quant * 64]; | |
327 | is_field_mode[mb_index] |= !j && dct_mode; | |
328 | } else { | |
329 | mb->idct_put = s->idct_put[dct_mode && log2_blocksize == 3]; | |
330 | mb->scan_table = s->dv_zigzag[dct_mode]; | |
331 | mb->factor_table = | |
332 | &s->idct_factor[(class1 == 3) * 2 * 22 * 64 + | |
333 | dct_mode * 22 * 64 + | |
334 | (quant + ff_dv_quant_offset[class1]) * 64]; | |
335 | } | |
336 | dc = dc << 2; | |
337 | /* convert to unsigned because 128 is not added in the | |
338 | * standard IDCT */ | |
339 | dc += 1024; | |
340 | block[0] = dc; | |
341 | buf_ptr += last_index >> 3; | |
342 | mb->pos = 0; | |
343 | mb->partial_bit_count = 0; | |
344 | ||
345 | av_dlog(avctx, "MB block: %d, %d ", mb_index, j); | |
346 | dv_decode_ac(&gb, mb, block); | |
347 | ||
348 | /* write the remaining bits in a new buffer only if the | |
349 | * block is finished */ | |
350 | if (mb->pos >= 64) | |
351 | bit_copy(&pb, &gb); | |
352 | ||
353 | block += 64; | |
354 | mb++; | |
355 | } | |
356 | ||
357 | /* pass 2: we can do it just after */ | |
358 | av_dlog(avctx, "***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index); | |
359 | block = block1; | |
360 | mb = mb1; | |
361 | init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb)); | |
362 | put_bits32(&pb, 0); // padding must be zeroed | |
363 | flush_put_bits(&pb); | |
364 | for (j = 0; j < s->sys->bpm; j++, block += 64, mb++) { | |
365 | if (mb->pos < 64 && get_bits_left(&gb) > 0) { | |
366 | dv_decode_ac(&gb, mb, block); | |
367 | /* if still not finished, no need to parse other blocks */ | |
368 | if (mb->pos < 64) | |
369 | break; | |
370 | } | |
371 | } | |
372 | /* all blocks are finished, so the extra bytes can be used at | |
373 | * the video segment level */ | |
374 | if (j >= s->sys->bpm) | |
375 | bit_copy(&vs_pb, &gb); | |
376 | } | |
377 | ||
378 | /* we need a pass over the whole video segment */ | |
379 | av_dlog(avctx, "***pass 3 size=%d\n", put_bits_count(&vs_pb)); | |
380 | block = &sblock[0][0]; | |
381 | mb = mb_data; | |
382 | init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb)); | |
383 | put_bits32(&vs_pb, 0); // padding must be zeroed | |
384 | flush_put_bits(&vs_pb); | |
385 | for (mb_index = 0; mb_index < 5; mb_index++) { | |
386 | for (j = 0; j < s->sys->bpm; j++) { | |
387 | if (mb->pos < 64 && get_bits_left(&gb) > 0) { | |
388 | av_dlog(avctx, "start %d:%d\n", mb_index, j); | |
389 | dv_decode_ac(&gb, mb, block); | |
390 | } | |
391 | if (mb->pos >= 64 && mb->pos < 127) | |
392 | av_log(avctx, AV_LOG_ERROR, | |
393 | "AC EOB marker is absent pos=%d\n", mb->pos); | |
394 | block += 64; | |
395 | mb++; | |
396 | } | |
397 | } | |
398 | ||
399 | /* compute idct and place blocks */ | |
400 | block = &sblock[0][0]; | |
401 | mb = mb_data; | |
402 | for (mb_index = 0; mb_index < 5; mb_index++) { | |
403 | dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y); | |
404 | ||
405 | /* idct_put'ting luminance */ | |
406 | if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) || | |
407 | (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) || | |
408 | (s->sys->height >= 720 && mb_y != 134)) { | |
409 | y_stride = (s->frame->linesize[0] << | |
410 | ((!is_field_mode[mb_index]) * log2_blocksize)); | |
411 | } else { | |
412 | y_stride = (2 << log2_blocksize); | |
413 | } | |
414 | y_ptr = s->frame->data[0] + | |
415 | ((mb_y * s->frame->linesize[0] + mb_x) << log2_blocksize); | |
416 | linesize = s->frame->linesize[0] << is_field_mode[mb_index]; | |
417 | mb[0].idct_put(y_ptr, linesize, block + 0 * 64); | |
418 | if (s->sys->video_stype == 4) { /* SD 422 */ | |
419 | mb[2].idct_put(y_ptr + (1 << log2_blocksize), linesize, block + 2 * 64); | |
420 | } else { | |
421 | mb[1].idct_put(y_ptr + (1 << log2_blocksize), linesize, block + 1 * 64); | |
422 | mb[2].idct_put(y_ptr + y_stride, linesize, block + 2 * 64); | |
423 | mb[3].idct_put(y_ptr + (1 << log2_blocksize) + y_stride, linesize, block + 3 * 64); | |
424 | } | |
425 | mb += 4; | |
426 | block += 4 * 64; | |
427 | ||
428 | /* idct_put'ting chrominance */ | |
429 | c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] + | |
430 | (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << log2_blocksize); | |
431 | for (j = 2; j; j--) { | |
432 | uint8_t *c_ptr = s->frame->data[j] + c_offset; | |
433 | if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) { | |
434 | uint64_t aligned_pixels[64 / 8]; | |
435 | uint8_t *pixels = (uint8_t *) aligned_pixels; | |
436 | uint8_t *c_ptr1, *ptr1; | |
437 | int x, y; | |
438 | mb->idct_put(pixels, 8, block); | |
439 | for (y = 0; y < (1 << log2_blocksize); y++, c_ptr += s->frame->linesize[j], pixels += 8) { | |
440 | ptr1 = pixels + ((1 << (log2_blocksize))>>1); | |
441 | c_ptr1 = c_ptr + (s->frame->linesize[j] << log2_blocksize); | |
442 | for (x = 0; x < (1 << FFMAX(log2_blocksize - 1, 0)); x++) { | |
443 | c_ptr[x] = pixels[x]; | |
444 | c_ptr1[x] = ptr1[x]; | |
445 | } | |
446 | } | |
447 | block += 64; | |
448 | mb++; | |
449 | } else { | |
450 | y_stride = (mb_y == 134) ? (1 << log2_blocksize) : | |
451 | s->frame->linesize[j] << ((!is_field_mode[mb_index]) * log2_blocksize); | |
452 | linesize = s->frame->linesize[j] << is_field_mode[mb_index]; | |
453 | (mb++)->idct_put(c_ptr, linesize, block); | |
454 | block += 64; | |
455 | if (s->sys->bpm == 8) { | |
456 | (mb++)->idct_put(c_ptr + y_stride, linesize, block); | |
457 | block += 64; | |
458 | } | |
459 | } | |
460 | } | |
461 | } | |
462 | return 0; | |
463 | } | |
464 | ||
465 | /* NOTE: exactly one frame must be given (120000 bytes for NTSC, | |
466 | * 144000 bytes for PAL - or twice those for 50Mbps) */ | |
467 | static int dvvideo_decode_frame(AVCodecContext *avctx, void *data, | |
468 | int *got_frame, AVPacket *avpkt) | |
469 | { | |
470 | uint8_t *buf = avpkt->data; | |
471 | int buf_size = avpkt->size; | |
472 | DVVideoContext *s = avctx->priv_data; | |
473 | const uint8_t *vsc_pack; | |
474 | int apt, is16_9, ret; | |
475 | const AVDVProfile *sys; | |
476 | ||
f6fa7814 | 477 | sys = ff_dv_frame_profile(avctx, s->sys, buf, buf_size); |
2ba45a60 DM |
478 | if (!sys || buf_size < sys->frame_size) { |
479 | av_log(avctx, AV_LOG_ERROR, "could not find dv frame profile\n"); | |
480 | return -1; /* NOTE: we only accept several full frames */ | |
481 | } | |
482 | ||
483 | if (sys != s->sys) { | |
484 | ret = ff_dv_init_dynamic_tables(s, sys); | |
485 | if (ret < 0) { | |
486 | av_log(avctx, AV_LOG_ERROR, "Error initializing the work tables.\n"); | |
487 | return ret; | |
488 | } | |
f6fa7814 | 489 | dv_init_weight_tables(s, sys); |
2ba45a60 DM |
490 | s->sys = sys; |
491 | } | |
492 | ||
493 | s->frame = data; | |
494 | s->frame->key_frame = 1; | |
495 | s->frame->pict_type = AV_PICTURE_TYPE_I; | |
496 | avctx->pix_fmt = s->sys->pix_fmt; | |
f6fa7814 | 497 | avctx->framerate = av_inv_q(s->sys->time_base); |
2ba45a60 DM |
498 | |
499 | ret = ff_set_dimensions(avctx, s->sys->width, s->sys->height); | |
500 | if (ret < 0) | |
501 | return ret; | |
502 | ||
503 | /* Determine the codec's sample_aspect ratio from the packet */ | |
504 | vsc_pack = buf + 80 * 5 + 48 + 5; | |
505 | if (*vsc_pack == dv_video_control) { | |
506 | apt = buf[4] & 0x07; | |
507 | is16_9 = (vsc_pack[2] & 0x07) == 0x02 || | |
f6fa7814 | 508 | (!apt && (vsc_pack[2] & 0x07) == 0x07); |
2ba45a60 DM |
509 | ff_set_sar(avctx, s->sys->sar[is16_9]); |
510 | } | |
511 | ||
512 | if ((ret = ff_get_buffer(avctx, s->frame, 0)) < 0) | |
513 | return ret; | |
514 | s->frame->interlaced_frame = 1; | |
515 | s->frame->top_field_first = 0; | |
516 | ||
517 | /* Determine the codec's field order from the packet */ | |
518 | if ( *vsc_pack == dv_video_control ) { | |
519 | s->frame->top_field_first = !(vsc_pack[3] & 0x40); | |
520 | } | |
521 | ||
522 | s->buf = buf; | |
523 | avctx->execute(avctx, dv_decode_video_segment, s->work_chunks, NULL, | |
524 | dv_work_pool_size(s->sys), sizeof(DVwork_chunk)); | |
525 | ||
526 | emms_c(); | |
527 | ||
528 | /* return image */ | |
529 | *got_frame = 1; | |
530 | ||
531 | return s->sys->frame_size; | |
532 | } | |
533 | ||
534 | AVCodec ff_dvvideo_decoder = { | |
535 | .name = "dvvideo", | |
536 | .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"), | |
537 | .type = AVMEDIA_TYPE_VIDEO, | |
538 | .id = AV_CODEC_ID_DVVIDEO, | |
539 | .priv_data_size = sizeof(DVVideoContext), | |
540 | .init = dvvideo_decode_init, | |
541 | .decode = dvvideo_decode_frame, | |
542 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS, | |
543 | .max_lowres = 3, | |
544 | }; |