FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/vc2enc.c
Date: 2026-01-16 07:34:38
Exec Total Coverage
Lines: 524 597 87.8%
Functions: 34 34 100.0%
Branches: 178 266 66.9%
Line Branch Exec Source
1 /*
2 * Copyright (C) 2016 Open Broadcast Systems Ltd.
3 * Author 2016 Rostislav Pehlivanov <atomnuker@gmail.com>
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 #include "libavutil/mem.h"
23 #include "libavutil/pixdesc.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/thread.h"
26 #include "libavutil/version.h"
27 #include "codec_internal.h"
28 #include "dirac.h"
29 #include "encode.h"
30 #include "put_bits.h"
31 #include "version.h"
32
33 #include "vc2enc_dwt.h"
34 #include "diractab.h"
35
36 /* The limited size resolution of each slice forces us to do this */
37 #define SSIZE_ROUND(b) (FFALIGN((b), s->size_scaler) + 4 + s->prefix_bytes)
38
39 /* Decides the cutoff point in # of slices to distribute the leftover bytes */
40 #define SLICE_REDIST_TOTAL 150
41
42 typedef struct VC2BaseVideoFormat {
43 enum AVPixelFormat pix_fmt;
44 AVRational time_base;
45 int width, height;
46 uint8_t interlaced, level;
47 char name[13];
48 } VC2BaseVideoFormat;
49
50 static const VC2BaseVideoFormat base_video_fmts[] = {
51 { 0 }, /* Custom format, here just to make indexing equal to base_vf */
52 { AV_PIX_FMT_YUV420P, { 1001, 15000 }, 176, 120, 0, 1, "QSIF525" },
53 { AV_PIX_FMT_YUV420P, { 2, 25 }, 176, 144, 0, 1, "QCIF" },
54 { AV_PIX_FMT_YUV420P, { 1001, 15000 }, 352, 240, 0, 1, "SIF525" },
55 { AV_PIX_FMT_YUV420P, { 2, 25 }, 352, 288, 0, 1, "CIF" },
56 { AV_PIX_FMT_YUV420P, { 1001, 15000 }, 704, 480, 0, 1, "4SIF525" },
57 { AV_PIX_FMT_YUV420P, { 2, 25 }, 704, 576, 0, 1, "4CIF" },
58
59 { AV_PIX_FMT_YUV422P10, { 1001, 30000 }, 720, 480, 1, 2, "SD480I-60" },
60 { AV_PIX_FMT_YUV422P10, { 1, 25 }, 720, 576, 1, 2, "SD576I-50" },
61
62 { AV_PIX_FMT_YUV422P10, { 1001, 60000 }, 1280, 720, 0, 3, "HD720P-60" },
63 { AV_PIX_FMT_YUV422P10, { 1, 50 }, 1280, 720, 0, 3, "HD720P-50" },
64 { AV_PIX_FMT_YUV422P10, { 1001, 30000 }, 1920, 1080, 1, 3, "HD1080I-60" },
65 { AV_PIX_FMT_YUV422P10, { 1, 25 }, 1920, 1080, 1, 3, "HD1080I-50" },
66 { AV_PIX_FMT_YUV422P10, { 1001, 60000 }, 1920, 1080, 0, 3, "HD1080P-60" },
67 { AV_PIX_FMT_YUV422P10, { 1, 50 }, 1920, 1080, 0, 3, "HD1080P-50" },
68
69 { AV_PIX_FMT_YUV444P12, { 1, 24 }, 2048, 1080, 0, 4, "DC2K" },
70 { AV_PIX_FMT_YUV444P12, { 1, 24 }, 4096, 2160, 0, 5, "DC4K" },
71
72 { AV_PIX_FMT_YUV422P10, { 1001, 60000 }, 3840, 2160, 0, 6, "UHDTV 4K-60" },
73 { AV_PIX_FMT_YUV422P10, { 1, 50 }, 3840, 2160, 0, 6, "UHDTV 4K-50" },
74
75 { AV_PIX_FMT_YUV422P10, { 1001, 60000 }, 7680, 4320, 0, 7, "UHDTV 8K-60" },
76 { AV_PIX_FMT_YUV422P10, { 1, 50 }, 7680, 4320, 0, 7, "UHDTV 8K-50" },
77
78 { AV_PIX_FMT_YUV422P10, { 1001, 24000 }, 1920, 1080, 0, 3, "HD1080P-24" },
79 { AV_PIX_FMT_YUV422P10, { 1001, 30000 }, 720, 486, 1, 2, "SD Pro486" },
80 };
81 static const int base_video_fmts_len = FF_ARRAY_ELEMS(base_video_fmts);
82
83 enum VC2_QM {
84 VC2_QM_DEF = 0,
85 VC2_QM_COL,
86 VC2_QM_FLAT,
87
88 VC2_QM_NB
89 };
90
91 typedef struct SubBand {
92 dwtcoef *buf;
93 ptrdiff_t stride;
94 int width;
95 int height;
96 } SubBand;
97
98 typedef struct Plane {
99 SubBand band[MAX_DWT_LEVELS][4];
100 dwtcoef *coef_buf;
101 int width;
102 int height;
103 int dwt_width;
104 int dwt_height;
105 ptrdiff_t coef_stride;
106 } Plane;
107
108 typedef struct SliceArgs {
109 const struct VC2EncContext *ctx;
110 union {
111 int cache[DIRAC_MAX_QUANT_INDEX];
112 uint8_t *buf;
113 };
114 int x;
115 int y;
116 int quant_idx;
117 int bits_ceil;
118 int bits_floor;
119 int bytes;
120 } SliceArgs;
121
122 typedef struct TransformArgs {
123 const struct VC2EncContext *ctx;
124 Plane *plane;
125 const void *idata;
126 ptrdiff_t istride;
127 int field;
128 VC2TransformContext t;
129 } TransformArgs;
130
131 typedef struct VC2EncContext {
132 AVClass *av_class;
133 PutBitContext pb;
134 Plane plane[3];
135 AVCodecContext *avctx;
136 DiracVersionInfo ver;
137
138 SliceArgs *slice_args;
139 TransformArgs transform_args[3];
140
141 /* For conversion from unsigned pixel values to signed */
142 int diff_offset;
143 int bpp;
144 int bpp_idx;
145
146 /* Picture number */
147 uint32_t picture_number;
148
149 /* Base video format */
150 int base_vf;
151 int level;
152 int profile;
153
154 /* Quantization matrix */
155 uint8_t quant[MAX_DWT_LEVELS][4];
156 int custom_quant_matrix;
157
158 /* Division LUT */
159 uint32_t qmagic_lut[116][2];
160
161 int num_x; /* #slices horizontally */
162 int num_y; /* #slices vertically */
163 int prefix_bytes;
164 int size_scaler;
165 int chroma_x_shift;
166 int chroma_y_shift;
167
168 /* Rate control stuff */
169 int frame_max_bytes;
170 int slice_max_bytes;
171 int slice_min_bytes;
172 int q_ceil;
173 int q_avg;
174
175 /* Options */
176 double tolerance;
177 int wavelet_idx;
178 int wavelet_depth;
179 int strict_compliance;
180 int slice_height;
181 int slice_width;
182 int interlaced;
183 enum VC2_QM quant_matrix;
184
185 /* Parse code state */
186 uint32_t next_parse_offset;
187 enum DiracParseCodes last_parse_code;
188 } VC2EncContext;
189
190 /// x_k x_{k-1} ... x_0 -> 0 x_k 0 x_{k - 1} ... 0 x_0
191 static uint16_t interleaved_ue_golomb_tab[256];
192 /// 1 x_{k-1} ... x_0 -> 0 0 0 x_{k - 1} ... 0 x_0
193 static uint16_t top_interleaved_ue_golomb_tab[256];
194 /// 1 x_{k-1} ... x_0 -> 2 * k
195 static uint8_t golomb_len_tab[256];
196 /// quant -> av_log2(ff_dirac_qscale_tab[quant]) + 32
197 static uint8_t qscale_len_tab[FF_ARRAY_ELEMS(ff_dirac_qscale_tab)];
198
199 33 static av_cold void vc2_init_static_data(void)
200 {
201 33 interleaved_ue_golomb_tab[1] = 1;
202
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 8415 for (unsigned i = 2; i < 256; ++i) {
203 8382 golomb_len_tab[i] = golomb_len_tab[i >> 1] + 2;
204 8382 interleaved_ue_golomb_tab[i] = (interleaved_ue_golomb_tab[i >> 1] << 2) | (i & 1);
205 8382 top_interleaved_ue_golomb_tab[i] = interleaved_ue_golomb_tab[i] ^ (1 << golomb_len_tab[i]);
206 }
207
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 3861 for (size_t i = 0; i < FF_ARRAY_ELEMS(qscale_len_tab); ++i)
208 3828 qscale_len_tab[i] = av_log2(ff_dirac_qscale_tab[i]) + 32;
209 33 }
210
211 35739495 static av_always_inline void put_vc2_ue_uint_inline(PutBitContext *pb, uint32_t val)
212 {
213 35739495 uint64_t pbits = 1;
214 35739495 int bits = 1;
215
216 35739495 ++val;
217
218
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 39007001 while (val >> 8) {
219 3267506 pbits |= (uint64_t)interleaved_ue_golomb_tab[val & 0xff] << bits;
220 3267506 val >>= 8;
221 3267506 bits += 16;
222 }
223 35739495 pbits |= (uint64_t)top_interleaved_ue_golomb_tab[val] << bits;
224 35739495 bits += golomb_len_tab[val];
225
226 35739495 put_bits63(pb, bits, pbits);
227 35739495 }
228
229 4455 static av_noinline void put_vc2_ue_uint(PutBitContext *pb, uint32_t val)
230 {
231 4455 put_vc2_ue_uint_inline(pb, val);
232 4455 }
233
234 35735040 static av_always_inline int count_vc2_ue_uint(uint32_t val)
235 {
236 35735040 return 2 * av_log2(val + 1) + 1;
237 }
238
239 /* VC-2 10.4 - parse_info() */
240 660 static void encode_parse_info(VC2EncContext *s, enum DiracParseCodes pcode)
241 {
242 uint32_t cur_pos, dist;
243
244 660 align_put_bits(&s->pb);
245
246 660 cur_pos = put_bytes_count(&s->pb, 0);
247
248 /* Magic string */
249 660 ff_put_string(&s->pb, "BBCD", 0);
250
251 /* Parse code */
252 660 put_bits(&s->pb, 8, pcode);
253
254 /* Next parse offset */
255 660 dist = cur_pos - s->next_parse_offset;
256 660 AV_WB32(s->pb.buf + s->next_parse_offset + 5, dist);
257 660 s->next_parse_offset = cur_pos;
258
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 660 put_bits32(&s->pb, pcode == DIRAC_PCODE_END_SEQ ? 13 : 0);
259
260 /* Last parse offset */
261
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 660 put_bits32(&s->pb, s->last_parse_code == DIRAC_PCODE_END_SEQ ? 13 : dist);
262
263 660 s->last_parse_code = pcode;
264 660 }
265
266 /* VC-2 11.1 - parse_parameters()
267 * The level dictates what the decoder should expect in terms of resolution
268 * and allows it to quickly reject whatever it can't support. Remember,
269 * this codec kinda targets cheapo FPGAs without much memory. Unfortunately
270 * it also limits us greatly in our choice of formats, hence the flag to disable
271 * strict_compliance */
272 165 static void encode_parse_params(VC2EncContext *s)
273 {
274 165 put_vc2_ue_uint(&s->pb, s->ver.major); /* VC-2 demands this to be 2 */
275 165 put_vc2_ue_uint(&s->pb, s->ver.minor); /* ^^ and this to be 0 */
276 165 put_vc2_ue_uint(&s->pb, s->profile); /* 3 to signal HQ profile */
277 165 put_vc2_ue_uint(&s->pb, s->level); /* 3 - 1080/720, 6 - 4K */
278 165 }
279
280 /* VC-2 11.3 - frame_size() */
281 165 static void encode_frame_size(VC2EncContext *s)
282 {
283 165 put_bits(&s->pb, 1, !s->strict_compliance);
284
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 165 if (!s->strict_compliance) {
285 165 AVCodecContext *avctx = s->avctx;
286 165 put_vc2_ue_uint(&s->pb, avctx->width);
287 165 put_vc2_ue_uint(&s->pb, avctx->height);
288 }
289 165 }
290
291 /* VC-2 11.3.3 - color_diff_sampling_format() */
292 165 static void encode_sample_fmt(VC2EncContext *s)
293 {
294 165 put_bits(&s->pb, 1, !s->strict_compliance);
295
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 165 if (!s->strict_compliance) {
296 int idx;
297
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 165 if (s->chroma_x_shift == 1 && s->chroma_y_shift == 0)
298 75 idx = 1; /* 422 */
299
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 90 else if (s->chroma_x_shift == 1 && s->chroma_y_shift == 1)
300 45 idx = 2; /* 420 */
301 else
302 45 idx = 0; /* 444 */
303 165 put_vc2_ue_uint(&s->pb, idx);
304 }
305 165 }
306
307 /* VC-2 11.3.4 - scan_format() */
308 165 static void encode_scan_format(VC2EncContext *s)
309 {
310 165 put_bits(&s->pb, 1, !s->strict_compliance);
311
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 165 if (!s->strict_compliance)
312 165 put_vc2_ue_uint(&s->pb, s->interlaced);
313 165 }
314
315 /* VC-2 11.3.5 - frame_rate() */
316 165 static void encode_frame_rate(VC2EncContext *s)
317 {
318 165 put_bits(&s->pb, 1, !s->strict_compliance);
319
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 165 if (!s->strict_compliance) {
320 165 AVCodecContext *avctx = s->avctx;
321 165 put_vc2_ue_uint(&s->pb, 0);
322 165 put_vc2_ue_uint(&s->pb, avctx->time_base.den);
323 165 put_vc2_ue_uint(&s->pb, avctx->time_base.num);
324 }
325 165 }
326
327 /* VC-2 11.3.6 - aspect_ratio() */
328 165 static void encode_aspect_ratio(VC2EncContext *s)
329 {
330 165 put_bits(&s->pb, 1, !s->strict_compliance);
331
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 165 if (!s->strict_compliance) {
332 165 AVCodecContext *avctx = s->avctx;
333 165 put_vc2_ue_uint(&s->pb, 0);
334 165 put_vc2_ue_uint(&s->pb, avctx->sample_aspect_ratio.num);
335 165 put_vc2_ue_uint(&s->pb, avctx->sample_aspect_ratio.den);
336 }
337 165 }
338
339 /* VC-2 11.3.7 - clean_area() */
340 165 static void encode_clean_area(VC2EncContext *s)
341 {
342 165 put_bits(&s->pb, 1, 0);
343 165 }
344
345 /* VC-2 11.3.8 - signal_range() */
346 165 static void encode_signal_range(VC2EncContext *s)
347 {
348 165 put_bits(&s->pb, 1, !s->strict_compliance);
349
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 165 if (!s->strict_compliance)
350 165 put_vc2_ue_uint(&s->pb, s->bpp_idx);
351 165 }
352
353 /* VC-2 11.3.9 - color_spec() */
354 165 static void encode_color_spec(VC2EncContext *s)
355 {
356 165 AVCodecContext *avctx = s->avctx;
357 165 put_bits(&s->pb, 1, !s->strict_compliance);
358
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 165 if (!s->strict_compliance) {
359 int val;
360 165 put_vc2_ue_uint(&s->pb, 0);
361
362 /* primaries */
363 165 put_bits(&s->pb, 1, 1);
364
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 165 if (avctx->color_primaries == AVCOL_PRI_BT470BG)
365 ✗ val = 2;
366
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 165 else if (avctx->color_primaries == AVCOL_PRI_SMPTE170M)
367 ✗ val = 1;
368
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 165 else if (avctx->color_primaries == AVCOL_PRI_SMPTE240M)
369 ✗ val = 1;
370 else
371 165 val = 0;
372 165 put_vc2_ue_uint(&s->pb, val);
373
374 /* color matrix */
375 165 put_bits(&s->pb, 1, 1);
376
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 165 if (avctx->colorspace == AVCOL_SPC_RGB)
377 ✗ val = 3;
378
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 165 else if (avctx->colorspace == AVCOL_SPC_YCOCG)
379 ✗ val = 2;
380
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 165 else if (avctx->colorspace == AVCOL_SPC_BT470BG)
381 ✗ val = 1;
382 else
383 165 val = 0;
384 165 put_vc2_ue_uint(&s->pb, val);
385
386 /* transfer function */
387 165 put_bits(&s->pb, 1, 1);
388
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 165 if (avctx->color_trc == AVCOL_TRC_LINEAR)
389 ✗ val = 2;
390
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 165 else if (avctx->color_trc == AVCOL_TRC_BT1361_ECG)
391 ✗ val = 1;
392 else
393 165 val = 0;
394 165 put_vc2_ue_uint(&s->pb, val);
395 }
396 165 }
397
398 /* VC-2 11.3 - source_parameters() */
399 165 static void encode_source_params(VC2EncContext *s)
400 {
401 165 encode_frame_size(s);
402 165 encode_sample_fmt(s);
403 165 encode_scan_format(s);
404 165 encode_frame_rate(s);
405 165 encode_aspect_ratio(s);
406 165 encode_clean_area(s);
407 165 encode_signal_range(s);
408 165 encode_color_spec(s);
409 165 }
410
411 /* VC-2 11 - sequence_header() */
412 165 static void encode_seq_header(VC2EncContext *s)
413 {
414 165 align_put_bits(&s->pb);
415 165 encode_parse_params(s);
416 165 put_vc2_ue_uint(&s->pb, s->base_vf);
417 165 encode_source_params(s);
418 165 put_vc2_ue_uint(&s->pb, s->interlaced); /* Frames or fields coding */
419 165 }
420
421 /* VC-2 12.1 - picture_header() */
422 165 static void encode_picture_header(VC2EncContext *s)
423 {
424 165 align_put_bits(&s->pb);
425 165 put_bits32(&s->pb, s->picture_number++);
426 165 }
427
428 /* VC-2 12.3.4.1 - slice_parameters() */
429 165 static void encode_slice_params(VC2EncContext *s)
430 {
431 165 put_vc2_ue_uint(&s->pb, s->num_x);
432 165 put_vc2_ue_uint(&s->pb, s->num_y);
433 165 put_vc2_ue_uint(&s->pb, s->prefix_bytes);
434 165 put_vc2_ue_uint(&s->pb, s->size_scaler);
435 165 }
436
437 /* 1st idx = LL, second - vertical, third - horizontal, fourth - total */
438 static const uint8_t vc2_qm_col_tab[][4] = {
439 {20, 9, 15, 4},
440 { 0, 6, 6, 4},
441 { 0, 3, 3, 5},
442 { 0, 3, 5, 1},
443 { 0, 11, 10, 11}
444 };
445
446 static const uint8_t vc2_qm_flat_tab[][4] = {
447 { 0, 0, 0, 0},
448 { 0, 0, 0, 0},
449 { 0, 0, 0, 0},
450 { 0, 0, 0, 0},
451 { 0, 0, 0, 0}
452 };
453
454 165 static void init_quant_matrix(VC2EncContext *s)
455 {
456 int level, orientation;
457
458
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 165 if (s->wavelet_depth <= 4 && s->quant_matrix == VC2_QM_DEF) {
459 165 s->custom_quant_matrix = 0;
460
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 825 for (level = 0; level < s->wavelet_depth; level++) {
461 660 s->quant[level][0] = ff_dirac_default_qmat[s->wavelet_idx][level][0];
462 660 s->quant[level][1] = ff_dirac_default_qmat[s->wavelet_idx][level][1];
463 660 s->quant[level][2] = ff_dirac_default_qmat[s->wavelet_idx][level][2];
464 660 s->quant[level][3] = ff_dirac_default_qmat[s->wavelet_idx][level][3];
465 }
466 165 return;
467 }
468
469 ✗ s->custom_quant_matrix = 1;
470
471 ✗ if (s->quant_matrix == VC2_QM_DEF) {
472 ✗ for (level = 0; level < s->wavelet_depth; level++) {
473 ✗ for (orientation = 0; orientation < 4; orientation++) {
474 ✗ if (level <= 3)
475 ✗ s->quant[level][orientation] = ff_dirac_default_qmat[s->wavelet_idx][level][orientation];
476 else
477 ✗ s->quant[level][orientation] = vc2_qm_col_tab[level][orientation];
478 }
479 }
480 ✗ } else if (s->quant_matrix == VC2_QM_COL) {
481 ✗ for (level = 0; level < s->wavelet_depth; level++) {
482 ✗ for (orientation = 0; orientation < 4; orientation++) {
483 ✗ s->quant[level][orientation] = vc2_qm_col_tab[level][orientation];
484 }
485 }
486 } else {
487 ✗ for (level = 0; level < s->wavelet_depth; level++) {
488 ✗ for (orientation = 0; orientation < 4; orientation++) {
489 ✗ s->quant[level][orientation] = vc2_qm_flat_tab[level][orientation];
490 }
491 }
492 }
493 }
494
495 /* VC-2 12.3.4.2 - quant_matrix() */
496 165 static void encode_quant_matrix(VC2EncContext *s)
497 {
498 int level;
499 165 put_bits(&s->pb, 1, s->custom_quant_matrix);
500
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 165 if (s->custom_quant_matrix) {
501 ✗ put_vc2_ue_uint(&s->pb, s->quant[0][0]);
502 ✗ for (level = 0; level < s->wavelet_depth; level++) {
503 ✗ put_vc2_ue_uint(&s->pb, s->quant[level][1]);
504 ✗ put_vc2_ue_uint(&s->pb, s->quant[level][2]);
505 ✗ put_vc2_ue_uint(&s->pb, s->quant[level][3]);
506 }
507 }
508 165 }
509
510 /* VC-2 12.3 - transform_parameters() */
511 165 static void encode_transform_params(VC2EncContext *s)
512 {
513 165 put_vc2_ue_uint(&s->pb, s->wavelet_idx);
514 165 put_vc2_ue_uint(&s->pb, s->wavelet_depth);
515
516 165 encode_slice_params(s);
517 165 encode_quant_matrix(s);
518 165 }
519
520 /* VC-2 12.2 - wavelet_transform() */
521 165 static void encode_wavelet_transform(VC2EncContext *s)
522 {
523 165 encode_transform_params(s);
524 165 align_put_bits(&s->pb);
525 165 }
526
527 /* VC-2 12 - picture_parse() */
528 165 static void encode_picture_start(VC2EncContext *s)
529 {
530 165 align_put_bits(&s->pb);
531 165 encode_picture_header(s);
532 165 align_put_bits(&s->pb);
533 165 encode_wavelet_transform(s);
534 165 }
535
536 #define QUANT(c, mul, add, shift) (((mul) * (c) + (add)) >> (shift))
537
538 /* VC-2 13.5.5.2 - slice_band() */
539 1274130 static void encode_subband(const VC2EncContext *s, PutBitContext *pb,
540 int sx, int sy, const SubBand *b, int quant)
541 {
542 int x, y;
543
544 1274130 const int left = b->width * (sx+0) / s->num_x;
545 1274130 const int right = b->width * (sx+1) / s->num_x;
546 1274130 const int top = b->height * (sy+0) / s->num_y;
547 1274130 const int bottom = b->height * (sy+1) / s->num_y;
548
549 1274130 dwtcoef *coeff = b->buf + top * b->stride;
550 1274130 const uint64_t q_m = ((uint64_t)(s->qmagic_lut[quant][0])) << 2;
551 1274130 const uint64_t q_a = s->qmagic_lut[quant][1];
552 1274130 const int q_s = qscale_len_tab[quant];
553
554
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555
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556
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 35735040 uint32_t c_abs = QUANT(FFABS(coeff[x]), q_m, q_a, q_s);
557 35735040 put_vc2_ue_uint_inline(pb, c_abs);
558
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 35735040 if (c_abs)
559 32314611 put_bits(pb, 1, coeff[x] < 0);
560 }
561 4098600 coeff += b->stride;
562 }
563 1274130 }
564
565 130680 static int count_hq_slice(SliceArgs *slice, int quant_idx)
566 {
567 int x, y;
568 uint8_t quants[MAX_DWT_LEVELS][4];
569 130680 int bits = 0, p, level, orientation;
570 130680 const VC2EncContext *s = slice->ctx;
571
572
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 130680 if (slice->cache[quant_idx])
573 98010 return slice->cache[quant_idx];
574
575 32670 bits += 8*s->prefix_bytes;
576 32670 bits += 8; /* quant_idx */
577
578
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 163350 for (level = 0; level < s->wavelet_depth; level++)
579
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 555390 for (orientation = !!level; orientation < 4; orientation++)
580 424710 quants[level][orientation] = FFMAX(quant_idx - s->quant[level][orientation], 0);
581
582
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 130680 for (p = 0; p < 3; p++) {
583 int bytes_start, bytes_len, pad_s, pad_c;
584 98010 bytes_start = bits >> 3;
585 98010 bits += 8;
586
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 490050 for (level = 0; level < s->wavelet_depth; level++) {
587
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 1666170 for (orientation = !!level; orientation < 4; orientation++) {
588 1274130 const SubBand *b = &s->plane[p].band[level][orientation];
589
590 1274130 const int q_idx = quants[level][orientation];
591 1274130 const uint64_t q_m = ((uint64_t)s->qmagic_lut[q_idx][0]) << 2;
592 1274130 const uint64_t q_a = s->qmagic_lut[q_idx][1];
593 1274130 const int q_s = qscale_len_tab[q_idx];
594
595 1274130 const int left = b->width * slice->x / s->num_x;
596 1274130 const int right = b->width *(slice->x+1) / s->num_x;
597 1274130 const int top = b->height * slice->y / s->num_y;
598 1274130 const int bottom = b->height *(slice->y+1) / s->num_y;
599
600 1274130 dwtcoef *buf = b->buf + top * b->stride;
601
602
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603
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604
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 35735040 uint32_t c_abs = QUANT(FFABS(buf[x]), q_m, q_a, q_s);
605 35735040 bits += count_vc2_ue_uint(c_abs);
606 35735040 bits += !!c_abs;
607 }
608 4098600 buf += b->stride;
609 }
610 }
611 }
612 98010 bits += FFALIGN(bits, 8) - bits;
613 98010 bytes_len = (bits >> 3) - bytes_start - 1;
614 98010 pad_s = FFALIGN(bytes_len, s->size_scaler)/s->size_scaler;
615 98010 pad_c = (pad_s*s->size_scaler) - bytes_len;
616 98010 bits += pad_c*8;
617 }
618
619 32670 slice->cache[quant_idx] = bits;
620
621 32670 return bits;
622 }
623
624 /* Approaches the best possible quantizer asymptotically, its kinda exhaustive
625 * but we have a LUT to get the coefficient size in bits. Guaranteed to never
626 * overshoot, which is apparently very important when streaming */
627 32670 static int rate_control(AVCodecContext *avctx, void *arg)
628 {
629 32670 SliceArgs *slice_dat = arg;
630 32670 const VC2EncContext *s = slice_dat->ctx;
631 32670 const int top = slice_dat->bits_ceil;
632 32670 const int bottom = slice_dat->bits_floor;
633 32670 int quant_buf[2] = {-1, -1};
634 32670 int quant = slice_dat->quant_idx, step = 1;
635 32670 int bits_last, bits = count_hq_slice(slice_dat, quant);
636
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 98010 while ((bits > top) || (bits < bottom)) {
637
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 98010 const int signed_step = bits > top ? +step : -step;
638 98010 quant = av_clip(quant + signed_step, 0, s->q_ceil-1);
639 98010 bits = count_hq_slice(slice_dat, quant);
640
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 98010 if (quant_buf[1] == quant) {
641 32670 quant = FFMAX(quant_buf[0], quant);
642
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 32670 bits = quant == quant_buf[0] ? bits_last : bits;
643 32670 break;
644 }
645 65340 step = av_clip(step/2, 1, (s->q_ceil-1)/2);
646 65340 quant_buf[1] = quant_buf[0];
647 65340 quant_buf[0] = quant;
648 65340 bits_last = bits;
649 }
650 32670 slice_dat->quant_idx = av_clip(quant, 0, s->q_ceil-1);
651 32670 slice_dat->bytes = SSIZE_ROUND(bits >> 3);
652 32670 return 0;
653 }
654
655 165 static int calc_slice_sizes(VC2EncContext *s)
656 {
657 165 int i, j, slice_x, slice_y, bytes_left = 0;
658 165 int bytes_top[SLICE_REDIST_TOTAL] = {0};
659 165 int64_t total_bytes_needed = 0;
660 165 int slice_redist_range = FFMIN(SLICE_REDIST_TOTAL, s->num_x*s->num_y);
661 165 SliceArgs *enc_args = s->slice_args;
662 165 SliceArgs *top_loc[SLICE_REDIST_TOTAL] = {NULL};
663
664 165 init_quant_matrix(s);
665
666
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 3135 for (slice_y = 0; slice_y < s->num_y; slice_y++) {
667
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 35640 for (slice_x = 0; slice_x < s->num_x; slice_x++) {
668 32670 SliceArgs *args = &enc_args[s->num_x*slice_y + slice_x];
669 32670 args->ctx = s;
670 32670 args->x = slice_x;
671 32670 args->y = slice_y;
672 32670 args->bits_ceil = s->slice_max_bytes << 3;
673 32670 args->bits_floor = s->slice_min_bytes << 3;
674 32670 memset(args->cache, 0, s->q_ceil*sizeof(*args->cache));
675 }
676 }
677
678 /* First pass - determine baseline slice sizes w.r.t. max_slice_size */
679 165 s->avctx->execute(s->avctx, rate_control, enc_args, NULL, s->num_x*s->num_y,
680 sizeof(SliceArgs));
681
682
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 32835 for (i = 0; i < s->num_x*s->num_y; i++) {
683 32670 SliceArgs *args = &enc_args[i];
684 32670 bytes_left += args->bytes;
685
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686
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 1155403 if (args->bytes > bytes_top[j]) {
687 32670 bytes_top[j] = args->bytes;
688 32670 top_loc[j] = args;
689 32670 break;
690 }
691 }
692 }
693
694 165 bytes_left = s->frame_max_bytes - bytes_left;
695
696 /* Second pass - distribute leftover bytes */
697
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 165 while (bytes_left > 0) {
698 165 int distributed = 0;
699
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 165 for (i = 0; i < slice_redist_range; i++) {
700 SliceArgs *args;
701 int bits, bytes, diff, prev_bytes, new_idx;
702
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 165 if (bytes_left <= 0)
703 ✗ break;
704
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 165 if (!top_loc[i] || !top_loc[i]->quant_idx)
705 break;
706 ✗ args = top_loc[i];
707 ✗ prev_bytes = args->bytes;
708 ✗ new_idx = FFMAX(args->quant_idx - 1, 0);
709 ✗ bits = count_hq_slice(args, new_idx);
710 ✗ bytes = SSIZE_ROUND(bits >> 3);
711 ✗ diff = bytes - prev_bytes;
712 ✗ if ((bytes_left - diff) > 0) {
713 ✗ args->quant_idx = new_idx;
714 ✗ args->bytes = bytes;
715 ✗ bytes_left -= diff;
716 ✗ distributed++;
717 }
718 }
719
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 165 if (!distributed)
720 165 break;
721 }
722
723
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 32835 for (i = 0; i < s->num_x*s->num_y; i++) {
724 32670 SliceArgs *args = &enc_args[i];
725 32670 total_bytes_needed += args->bytes;
726 32670 s->q_avg = (s->q_avg + args->quant_idx)/2;
727 }
728
729 165 return total_bytes_needed;
730 }
731
732 /* VC-2 13.5.3 - hq_slice */
733 32670 static int encode_hq_slice(AVCodecContext *avctx, void *arg)
734 {
735 32670 const SliceArgs *slice_dat = arg;
736 32670 const VC2EncContext *s = slice_dat->ctx;
737 32670 PutBitContext pb0, *const pb = &pb0;
738 32670 const int slice_x = slice_dat->x;
739 32670 const int slice_y = slice_dat->y;
740 32670 const int quant_idx = slice_dat->quant_idx;
741 32670 const int slice_bytes_max = slice_dat->bytes;
742 uint8_t quants[MAX_DWT_LEVELS][4];
743 int p, level, orientation;
744
745 /* The reference decoder ignores it, and its typical length is 0 */
746 32670 memset(slice_dat->buf, 0, s->prefix_bytes);
747
748 32670 init_put_bits(pb, slice_dat->buf + s->prefix_bytes, slice_dat->bytes - s->prefix_bytes);
749
750 32670 put_bits(pb, 8, quant_idx);
751
752 /* Slice quantization (slice_quantizers() in the specs) */
753
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 163350 for (level = 0; level < s->wavelet_depth; level++)
754
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 555390 for (orientation = !!level; orientation < 4; orientation++)
755 424710 quants[level][orientation] = FFMAX(quant_idx - s->quant[level][orientation], 0);
756
757 /* Luma + 2 Chroma planes */
758
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 130680 for (p = 0; p < 3; p++) {
759 int bytes_start, bytes_len, pad_s, pad_c;
760 98010 bytes_start = put_bytes_count(pb, 0);
761 98010 put_bits(pb, 8, 0);
762
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 490050 for (level = 0; level < s->wavelet_depth; level++) {
763
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 1666170 for (orientation = !!level; orientation < 4; orientation++) {
764 1274130 encode_subband(s, pb, slice_x, slice_y,
765 &s->plane[p].band[level][orientation],
766 1274130 quants[level][orientation]);
767 }
768 }
769 98010 flush_put_bits(pb);
770 98010 bytes_len = put_bytes_output(pb) - bytes_start - 1;
771
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 98010 if (p == 2) {
772 32670 int len_diff = slice_bytes_max - put_bytes_output(pb);
773 32670 pad_s = FFALIGN((bytes_len + len_diff), s->size_scaler)/s->size_scaler;
774 32670 pad_c = (pad_s*s->size_scaler) - bytes_len;
775 } else {
776 65340 pad_s = FFALIGN(bytes_len, s->size_scaler)/s->size_scaler;
777 65340 pad_c = (pad_s*s->size_scaler) - bytes_len;
778 }
779 98010 pb->buf[bytes_start] = pad_s;
780 /* vc2-reference uses that padding that decodes to '0' coeffs */
781 98010 memset(put_bits_ptr(pb), 0xFF, pad_c);
782 98010 skip_put_bytes(pb, pad_c);
783 }
784
785 32670 return 0;
786 }
787
788 /* VC-2 13.5.1 - low_delay_transform_data() */
789 165 static int encode_slices(VC2EncContext *s)
790 {
791 uint8_t *buf;
792 165 int slice_x, slice_y, skip = 0;
793 165 SliceArgs *enc_args = s->slice_args;
794
795 165 flush_put_bits(&s->pb);
796 165 buf = put_bits_ptr(&s->pb);
797
798
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 3135 for (slice_y = 0; slice_y < s->num_y; slice_y++) {
799
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 35640 for (slice_x = 0; slice_x < s->num_x; slice_x++) {
800 32670 SliceArgs *args = &enc_args[s->num_x*slice_y + slice_x];
801 32670 args->buf = buf + skip;
802 32670 skip += args->bytes;
803 }
804 }
805
806 165 s->avctx->execute(s->avctx, encode_hq_slice, enc_args, NULL, s->num_x*s->num_y,
807 sizeof(SliceArgs));
808
809 165 skip_put_bytes(&s->pb, skip);
810
811 165 return 0;
812 }
813
814 /*
815 * Transform basics for a 3 level transform
816 * |---------------------------------------------------------------------|
817 * | LL-0 | HL-0 | | |
818 * |--------|-------| HL-1 | |
819 * | LH-0 | HH-0 | | |
820 * |----------------|-----------------| HL-2 |
821 * | | | |
822 * | LH-1 | HH-1 | |
823 * | | | |
824 * |----------------------------------|----------------------------------|
825 * | | |
826 * | | |
827 * | | |
828 * | LH-2 | HH-2 |
829 * | | |
830 * | | |
831 * | | |
832 * |---------------------------------------------------------------------|
833 *
834 * DWT transforms are generally applied by splitting the image in two vertically
835 * and applying a low pass transform on the left part and a corresponding high
836 * pass transform on the right hand side. This is known as the horizontal filter
837 * stage.
838 * After that, the same operation is performed except the image is divided
839 * horizontally, with the high pass on the lower and the low pass on the higher
840 * side.
841 * Therefore, you're left with 4 subdivisions - known as low-low, low-high,
842 * high-low and high-high. They're referred to as orientations in the decoder
843 * and encoder.
844 *
845 * The LL (low-low) area contains the original image downsampled by the amount
846 * of levels. The rest of the areas can be thought as the details needed
847 * to restore the image perfectly to its original size.
848 */
849 495 static int dwt_plane(AVCodecContext *avctx, void *arg)
850 {
851 495 TransformArgs *transform_dat = arg;
852 495 const VC2EncContext *s = transform_dat->ctx;
853 495 const void *frame_data = transform_dat->idata;
854 495 const ptrdiff_t linesize = transform_dat->istride;
855 495 const int field = transform_dat->field;
856 495 const Plane *p = transform_dat->plane;
857 495 VC2TransformContext *t = &transform_dat->t;
858 495 dwtcoef *buf = p->coef_buf;
859 495 const int idx = s->wavelet_idx;
860 495 const int skip = 1 + s->interlaced;
861
862 int x, y, level, offset;
863 495 ptrdiff_t pix_stride = linesize >> (s->bpp - 1);
864
865
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 495 if (field == 1) {
866 ✗ offset = 0;
867 ✗ pix_stride <<= 1;
868
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 495 } else if (field == 2) {
869 ✗ offset = pix_stride;
870 ✗ pix_stride <<= 1;
871 } else {
872 495 offset = 0;
873 }
874
875
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 495 if (s->bpp == 1) {
876 135 const uint8_t *pix = (const uint8_t *)frame_data + offset;
877
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 34695 for (y = 0; y < p->height*skip; y+=skip) {
878
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 9918720 for (x = 0; x < p->width; x++) {
879 9884160 buf[x] = pix[x] - s->diff_offset;
880 }
881 34560 memset(&buf[x], 0, (p->coef_stride - p->width)*sizeof(dwtcoef));
882 34560 buf += p->coef_stride;
883 34560 pix += pix_stride;
884 }
885 } else {
886 360 const uint16_t *pix = (const uint16_t *)frame_data + offset;
887
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 95400 for (y = 0; y < p->height*skip; y+=skip) {
888
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 25945920 for (x = 0; x < p->width; x++) {
889 25850880 buf[x] = pix[x] - s->diff_offset;
890 }
891 95040 memset(&buf[x], 0, (p->coef_stride - p->width)*sizeof(dwtcoef));
892 95040 buf += p->coef_stride;
893 95040 pix += pix_stride;
894 }
895 }
896
897 495 memset(buf, 0, p->coef_stride * (p->dwt_height - p->height) * sizeof(dwtcoef));
898
899
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 2475 for (level = s->wavelet_depth-1; level >= 0; level--) {
900 1980 const SubBand *b = &p->band[level][0];
901 1980 t->vc2_subband_dwt[idx](t, p->coef_buf, p->coef_stride,
902 1980 b->width, b->height);
903 }
904
905 495 return 0;
906 }
907
908 165 static int encode_frame(VC2EncContext *s, AVPacket *avpkt, const AVFrame *frame,
909 const char *aux_data, const int header_size, int field)
910 {
911 int i, ret;
912 int64_t max_frame_bytes;
913
914 /* Threaded DWT transform */
915
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 660 for (i = 0; i < 3; i++) {
916 495 s->transform_args[i].ctx = s;
917 495 s->transform_args[i].field = field;
918 495 s->transform_args[i].plane = &s->plane[i];
919 495 s->transform_args[i].idata = frame->data[i];
920 495 s->transform_args[i].istride = frame->linesize[i];
921 }
922 165 s->avctx->execute(s->avctx, dwt_plane, s->transform_args, NULL, 3,
923 sizeof(TransformArgs));
924
925 /* Calculate per-slice quantizers and sizes */
926 165 max_frame_bytes = header_size + calc_slice_sizes(s);
927
928
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 165 if (field < 2) {
929 165 ret = ff_get_encode_buffer(s->avctx, avpkt,
930 165 max_frame_bytes << s->interlaced, 0);
931
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 165 if (ret < 0)
932 ✗ return ret;
933 165 init_put_bits(&s->pb, avpkt->data, avpkt->size);
934 }
935
936 /* Sequence header */
937 165 encode_parse_info(s, DIRAC_PCODE_SEQ_HEADER);
938 165 encode_seq_header(s);
939
940 /* Encoder version */
941
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 165 if (aux_data) {
942 165 encode_parse_info(s, DIRAC_PCODE_AUX);
943 165 ff_put_string(&s->pb, aux_data, 1);
944 }
945
946 /* Picture header */
947 165 encode_parse_info(s, DIRAC_PCODE_PICTURE_HQ);
948 165 encode_picture_start(s);
949
950 /* Encode slices */
951 165 encode_slices(s);
952
953 /* End sequence */
954 165 encode_parse_info(s, DIRAC_PCODE_END_SEQ);
955
956 165 return 0;
957 }
958
959 165 static av_cold int vc2_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
960 const AVFrame *frame, int *got_packet)
961 {
962 165 int ret = 0;
963 165 int slice_ceil, sig_size = 256;
964 165 VC2EncContext *s = avctx->priv_data;
965 165 const int bitexact = avctx->flags & AV_CODEC_FLAG_BITEXACT;
966
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 165 const char *aux_data = bitexact ? "Lavc" : LIBAVCODEC_IDENT;
967
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 165 const int aux_data_size = bitexact ? sizeof("Lavc") : sizeof(LIBAVCODEC_IDENT);
968 165 const int header_size = 100 + aux_data_size;
969 165 int64_t r_bitrate = avctx->bit_rate >> (s->interlaced);
970
971 165 s->avctx = avctx;
972 165 s->size_scaler = 2;
973 165 s->prefix_bytes = 0;
974 165 s->last_parse_code = 0;
975 165 s->next_parse_offset = 0;
976
977 /* Rate control */
978 165 s->frame_max_bytes = (av_rescale(r_bitrate, s->avctx->time_base.num,
979 165 s->avctx->time_base.den) >> 3) - header_size;
980 165 s->slice_max_bytes = slice_ceil = av_rescale(s->frame_max_bytes, 1, s->num_x*s->num_y);
981
982 /* Find an appropriate size scaler */
983
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 1155 while (sig_size > 255) {
984 990 int r_size = SSIZE_ROUND(s->slice_max_bytes);
985
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 990 if (r_size > slice_ceil) {
986 825 s->slice_max_bytes -= r_size - slice_ceil;
987 825 r_size = SSIZE_ROUND(s->slice_max_bytes);
988 }
989 990 sig_size = r_size/s->size_scaler; /* Signalled slize size */
990 990 s->size_scaler <<= 1;
991 }
992
993 165 s->slice_min_bytes = s->slice_max_bytes - s->slice_max_bytes*(s->tolerance/100.0f);
994
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 165 if (s->slice_min_bytes < 0 || s->slice_max_bytes > INT_MAX >> 3)
995 ✗ return AVERROR(EINVAL);
996
997 165 ret = encode_frame(s, avpkt, frame, aux_data, header_size, s->interlaced);
998
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 165 if (ret)
999 ✗ return ret;
1000
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 165 if (s->interlaced) {
1001 ✗ ret = encode_frame(s, avpkt, frame, aux_data, header_size, 2);
1002 ✗ if (ret)
1003 ✗ return ret;
1004 }
1005
1006 165 flush_put_bits(&s->pb);
1007 165 av_shrink_packet(avpkt, put_bytes_output(&s->pb));
1008
1009 165 *got_packet = 1;
1010
1011 165 return 0;
1012 }
1013
1014 33 static av_cold int vc2_encode_end(AVCodecContext *avctx)
1015 {
1016 int i;
1017 33 VC2EncContext *s = avctx->priv_data;
1018
1019 33 av_log(avctx, AV_LOG_INFO, "Qavg: %i\n", s->q_avg);
1020
1021
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 132 for (i = 0; i < 3; i++) {
1022 99 ff_vc2enc_free_transforms(&s->transform_args[i].t);
1023 99 av_freep(&s->plane[i].coef_buf);
1024 }
1025
1026 33 av_freep(&s->slice_args);
1027
1028 33 return 0;
1029 }
1030
1031 33 static av_cold int vc2_encode_init(AVCodecContext *avctx)
1032 {
1033 static AVOnce init_static_once = AV_ONCE_INIT;
1034 Plane *p;
1035 SubBand *b;
1036 int i, level, o, shift;
1037 const AVPixFmtDescriptor *pixdesc;
1038 int depth;
1039 33 VC2EncContext *s = avctx->priv_data;
1040
1041 33 s->picture_number = 0;
1042
1043 /* Total allowed quantization range */
1044 33 s->q_ceil = DIRAC_MAX_QUANT_INDEX;
1045
1046 33 s->ver.major = 2;
1047 33 s->ver.minor = 0;
1048 33 s->profile = 3;
1049 33 s->level = 3;
1050
1051 33 s->base_vf = -1;
1052 33 s->strict_compliance = 1;
1053
1054 33 s->q_avg = 0;
1055 33 s->slice_max_bytes = 0;
1056 33 s->slice_min_bytes = 0;
1057
1058 /* Mark unknown as progressive */
1059
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 66 s->interlaced = !((avctx->field_order == AV_FIELD_UNKNOWN) ||
1060
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 33 (avctx->field_order == AV_FIELD_PROGRESSIVE));
1061
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 792 for (i = 0; i < base_video_fmts_len; i++) {
1063 759 const VC2BaseVideoFormat *fmt = &base_video_fmts[i];
1064
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 759 if (avctx->pix_fmt != fmt->pix_fmt)
1065 606 continue;
1066
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 153 if (avctx->time_base.num != fmt->time_base.num)
1067 93 continue;
1068
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 60 if (avctx->time_base.den != fmt->time_base.den)
1069 42 continue;
1070
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 18 if (avctx->width != fmt->width)
1071 18 continue;
1072 ✗ if (avctx->height != fmt->height)
1073 ✗ continue;
1074 ✗ if (s->interlaced != fmt->interlaced)
1075 ✗ continue;
1076 ✗ s->base_vf = i;
1077 ✗ s->level = base_video_fmts[i].level;
1078 ✗ break;
1079 }
1080
1081
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 33 if (s->interlaced)
1082 ✗ av_log(avctx, AV_LOG_WARNING, "Interlacing enabled!\n");
1083
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 33 if ((s->slice_width & (s->slice_width - 1)) ||
1085
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 33 (s->slice_height & (s->slice_height - 1))) {
1086 ✗ av_log(avctx, AV_LOG_ERROR, "Slice size is not a power of two!\n");
1087 ✗ return AVERROR(EINVAL);
1088 }
1089
1090
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 33 if ((s->slice_width > avctx->width) ||
1091
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 33 (s->slice_height > avctx->height)) {
1092 ✗ av_log(avctx, AV_LOG_ERROR, "Slice size is bigger than the image!\n");
1093 ✗ return AVERROR(EINVAL);
1094 }
1095
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 33 if (s->base_vf <= 0) {
1097
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 33 if (avctx->strict_std_compliance < FF_COMPLIANCE_STRICT) {
1098 33 s->strict_compliance = s->base_vf = 0;
1099 33 av_log(avctx, AV_LOG_WARNING, "Format does not strictly comply with VC2 specs\n");
1100 } else {
1101 ✗ av_log(avctx, AV_LOG_WARNING, "Given format does not strictly comply with "
1102 "the specifications, decrease strictness to use it.\n");
1103 ✗ return AVERROR(EINVAL);
1104 }
1105 } else {
1106 ✗ av_log(avctx, AV_LOG_INFO, "Selected base video format = %i (%s)\n",
1107 ✗ s->base_vf, base_video_fmts[s->base_vf].name);
1108 }
1109
1110 33 pixdesc = av_pix_fmt_desc_get(avctx->pix_fmt);
1111 /* Chroma subsampling */
1112 33 s->chroma_x_shift = pixdesc->log2_chroma_w;
1113 33 s->chroma_y_shift = pixdesc->log2_chroma_h;
1114
1115 /* Bit depth and color range index */
1116 33 depth = pixdesc->comp[0].depth;
1117
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 33 if (depth == 8 && avctx->color_range == AVCOL_RANGE_JPEG) {
1118 ✗ s->bpp = 1;
1119 ✗ s->bpp_idx = 1;
1120 ✗ s->diff_offset = 128;
1121
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 33 } else if (depth == 8 && (avctx->color_range == AVCOL_RANGE_MPEG ||
1122 ✗ avctx->color_range == AVCOL_RANGE_UNSPECIFIED)) {
1123 9 s->bpp = 1;
1124 9 s->bpp_idx = 2;
1125 9 s->diff_offset = 128;
1126
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 24 } else if (depth == 10) {
1127 15 s->bpp = 2;
1128 15 s->bpp_idx = 3;
1129 15 s->diff_offset = 512;
1130 } else {
1131 9 s->bpp = 2;
1132 9 s->bpp_idx = 4;
1133 9 s->diff_offset = 2048;
1134 }
1135
1136 /* Planes initialization */
1137
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 132 for (i = 0; i < 3; i++) {
1138 int w, h;
1139 99 p = &s->plane[i];
1140
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 99 p->width = avctx->width >> (i ? s->chroma_x_shift : 0);
1141
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 99 p->height = avctx->height >> (i ? s->chroma_y_shift : 0);
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 99 if (s->interlaced)
1143 ✗ p->height >>= 1;
1144 99 p->dwt_width = w = FFALIGN(p->width, (1 << s->wavelet_depth));
1145 99 p->dwt_height = h = FFALIGN(p->height, (1 << s->wavelet_depth));
1146 99 p->coef_stride = FFALIGN(p->dwt_width, 32);
1147 99 p->coef_buf = av_mallocz(p->coef_stride*p->dwt_height*sizeof(dwtcoef));
1148
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 99 if (!p->coef_buf)
1149 ✗ return AVERROR(ENOMEM);
1150
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 495 for (level = s->wavelet_depth-1; level >= 0; level--) {
1151 396 w = w >> 1;
1152 396 h = h >> 1;
1153
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 1980 for (o = 0; o < 4; o++) {
1154 1584 b = &p->band[level][o];
1155 1584 b->width = w;
1156 1584 b->height = h;
1157 1584 b->stride = p->coef_stride;
1158 1584 shift = (o > 1)*b->height*b->stride + (o & 1)*b->width;
1159 1584 b->buf = p->coef_buf + shift;
1160 }
1161 }
1162
1163 /* DWT init */
1164
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 99 if (ff_vc2enc_init_transforms(&s->transform_args[i].t,
1165 99 s->plane[i].coef_stride,
1166 s->plane[i].dwt_height,
1167 s->slice_width, s->slice_height))
1168 ✗ return AVERROR(ENOMEM);
1169 }
1170
1171 /* Slices */
1172 33 s->num_x = s->plane[0].dwt_width/s->slice_width;
1173 33 s->num_y = s->plane[0].dwt_height/s->slice_height;
1174
1175 33 s->slice_args = av_calloc(s->num_x*s->num_y, sizeof(SliceArgs));
1176
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 33 if (!s->slice_args)
1177 ✗ return AVERROR(ENOMEM);
1178
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 3861 for (i = 0; i < 116; i++) {
1180 3828 const uint64_t qf = ff_dirac_qscale_tab[i];
1181 3828 const uint32_t m = av_log2(qf);
1182 3828 const uint32_t t = (1ULL << (m + 32)) / qf;
1183 3828 const uint32_t r = (t*qf + qf) & UINT32_MAX;
1184
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 3828 if (!(qf & (qf - 1))) {
1185 957 s->qmagic_lut[i][0] = 0xFFFFFFFF;
1186 957 s->qmagic_lut[i][1] = 0xFFFFFFFF;
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 2871 } else if (r <= 1 << m) {
1188 2145 s->qmagic_lut[i][0] = t + 1;
1189 2145 s->qmagic_lut[i][1] = 0;
1190 } else {
1191 726 s->qmagic_lut[i][0] = t;
1192 726 s->qmagic_lut[i][1] = t;
1193 }
1194 }
1195
1196 33 ff_thread_once(&init_static_once, vc2_init_static_data);
1197
1198 33 return 0;
1199 }
1200
1201 #define VC2ENC_FLAGS (AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
1202 static const AVOption vc2enc_options[] = {
1203 {"tolerance", "Max undershoot in percent", offsetof(VC2EncContext, tolerance), AV_OPT_TYPE_DOUBLE, {.dbl = 5.0f}, 0.0f, 45.0f, VC2ENC_FLAGS, .unit = "tolerance"},
1204 {"slice_width", "Slice width", offsetof(VC2EncContext, slice_width), AV_OPT_TYPE_INT, {.i64 = 32}, 32, 1024, VC2ENC_FLAGS, .unit = "slice_width"},
1205 {"slice_height", "Slice height", offsetof(VC2EncContext, slice_height), AV_OPT_TYPE_INT, {.i64 = 16}, 8, 1024, VC2ENC_FLAGS, .unit = "slice_height"},
1206 {"wavelet_depth", "Transform depth", offsetof(VC2EncContext, wavelet_depth), AV_OPT_TYPE_INT, {.i64 = 4}, 1, 5, VC2ENC_FLAGS, .unit = "wavelet_depth"},
1207 {"wavelet_type", "Transform type", offsetof(VC2EncContext, wavelet_idx), AV_OPT_TYPE_INT, {.i64 = VC2_TRANSFORM_9_7}, 0, VC2_TRANSFORMS_NB, VC2ENC_FLAGS, .unit = "wavelet_idx"},
1208 {"9_7", "Deslauriers-Dubuc (9,7)", 0, AV_OPT_TYPE_CONST, {.i64 = VC2_TRANSFORM_9_7}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit = "wavelet_idx"},
1209 {"5_3", "LeGall (5,3)", 0, AV_OPT_TYPE_CONST, {.i64 = VC2_TRANSFORM_5_3}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit = "wavelet_idx"},
1210 {"haar", "Haar (with shift)", 0, AV_OPT_TYPE_CONST, {.i64 = VC2_TRANSFORM_HAAR_S}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit = "wavelet_idx"},
1211 {"haar_noshift", "Haar (without shift)", 0, AV_OPT_TYPE_CONST, {.i64 = VC2_TRANSFORM_HAAR}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit = "wavelet_idx"},
1212 {"qm", "Custom quantization matrix", offsetof(VC2EncContext, quant_matrix), AV_OPT_TYPE_INT, {.i64 = VC2_QM_DEF}, 0, VC2_QM_NB, VC2ENC_FLAGS, .unit = "quant_matrix"},
1213 {"default", "Default from the specifications", 0, AV_OPT_TYPE_CONST, {.i64 = VC2_QM_DEF}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit = "quant_matrix"},
1214 {"color", "Prevents low bitrate discoloration", 0, AV_OPT_TYPE_CONST, {.i64 = VC2_QM_COL}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit = "quant_matrix"},
1215 {"flat", "Optimize for PSNR", 0, AV_OPT_TYPE_CONST, {.i64 = VC2_QM_FLAT}, INT_MIN, INT_MAX, VC2ENC_FLAGS, .unit = "quant_matrix"},
1216 {NULL}
1217 };
1218
1219 static const AVClass vc2enc_class = {
1220 .class_name = "SMPTE VC-2 encoder",
1221 .category = AV_CLASS_CATEGORY_ENCODER,
1222 .option = vc2enc_options,
1223 .item_name = av_default_item_name,
1224 .version = LIBAVUTIL_VERSION_INT
1225 };
1226
1227 static const FFCodecDefault vc2enc_defaults[] = {
1228 { "b", "600000000" },
1229 { NULL },
1230 };
1231
1232 static const enum AVPixelFormat allowed_pix_fmts[] = {
1233 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
1234 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
1235 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
1236 AV_PIX_FMT_NONE
1237 };
1238
1239 const FFCodec ff_vc2_encoder = {
1240 .p.name = "vc2",
1241 CODEC_LONG_NAME("SMPTE VC-2"),
1242 .p.type = AVMEDIA_TYPE_VIDEO,
1243 .p.id = AV_CODEC_ID_DIRAC,
1244 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS |
1245 AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
1246 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1247 .priv_data_size = sizeof(VC2EncContext),
1248 .init = vc2_encode_init,
1249 .close = vc2_encode_end,
1250 FF_CODEC_ENCODE_CB(vc2_encode_frame),
1251 .p.priv_class = &vc2enc_class,
1252 .defaults = vc2enc_defaults,
1253 CODEC_PIXFMTS_ARRAY(allowed_pix_fmts),
1254 .color_ranges = AVCOL_RANGE_MPEG | AVCOL_RANGE_JPEG,
1255 };
1256