checkasm: Add tests for h264 idct
[libav.git] / libavcodec / ffv1dec.c
1 /*
2 * FFV1 decoder
3 *
4 * Copyright (c) 2003-2012 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of Libav.
7 *
8 * Libav is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * Libav is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * FF Video Codec 1 (a lossless codec) decoder
26 */
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/crc.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/timer.h"
34 #include "avcodec.h"
35 #include "internal.h"
36 #include "get_bits.h"
37 #include "put_bits.h"
38 #include "rangecoder.h"
39 #include "golomb.h"
40 #include "mathops.h"
41 #include "ffv1.h"
42
43 static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state,
44 int is_signed)
45 {
46 if (get_rac(c, state + 0))
47 return 0;
48 else {
49 int i, e, a;
50 e = 0;
51 while (get_rac(c, state + 1 + FFMIN(e, 9))) // 1..10
52 e++;
53
54 a = 1;
55 for (i = e - 1; i >= 0; i--)
56 a += a + get_rac(c, state + 22 + FFMIN(i, 9)); // 22..31
57
58 e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21
59 return (a ^ e) - e;
60 }
61 }
62
63 static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
64 {
65 return get_symbol_inline(c, state, is_signed);
66 }
67
68 static inline int get_vlc_symbol(GetBitContext *gb, VlcState *const state,
69 int bits)
70 {
71 int k, i, v, ret;
72
73 i = state->count;
74 k = 0;
75 while (i < state->error_sum) { // FIXME: optimize
76 k++;
77 i += i;
78 }
79
80 assert(k <= 8);
81
82 v = get_sr_golomb(gb, k, 12, bits);
83 ff_dlog(NULL, "v:%d bias:%d error:%d drift:%d count:%d k:%d",
84 v, state->bias, state->error_sum, state->drift, state->count, k);
85
86 #if 0 // JPEG LS
87 if (k == 0 && 2 * state->drift <= -state->count)
88 v ^= (-1);
89 #else
90 v ^= ((2 * state->drift + state->count) >> 31);
91 #endif
92
93 ret = fold(v + state->bias, bits);
94
95 update_vlc_state(state, v);
96
97 return ret;
98 }
99
100 static av_always_inline void decode_line(FFV1Context *s, int w,
101 int16_t *sample[2],
102 int plane_index, int bits)
103 {
104 PlaneContext *const p = &s->plane[plane_index];
105 RangeCoder *const c = &s->c;
106 int x;
107 int run_count = 0;
108 int run_mode = 0;
109 int run_index = s->run_index;
110
111 for (x = 0; x < w; x++) {
112 int diff, context, sign;
113
114 context = get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);
115 if (context < 0) {
116 context = -context;
117 sign = 1;
118 } else
119 sign = 0;
120
121 av_assert2(context < p->context_count);
122
123 if (s->ac != AC_GOLOMB_RICE) {
124 diff = get_symbol_inline(c, p->state[context], 1);
125 } else {
126 if (context == 0 && run_mode == 0)
127 run_mode = 1;
128
129 if (run_mode) {
130 if (run_count == 0 && run_mode == 1) {
131 if (get_bits1(&s->gb)) {
132 run_count = 1 << ff_log2_run[run_index];
133 if (x + run_count <= w)
134 run_index++;
135 } else {
136 if (ff_log2_run[run_index])
137 run_count = get_bits(&s->gb, ff_log2_run[run_index]);
138 else
139 run_count = 0;
140 if (run_index)
141 run_index--;
142 run_mode = 2;
143 }
144 }
145 run_count--;
146 if (run_count < 0) {
147 run_mode = 0;
148 run_count = 0;
149 diff = get_vlc_symbol(&s->gb, &p->vlc_state[context],
150 bits);
151 if (diff >= 0)
152 diff++;
153 } else
154 diff = 0;
155 } else
156 diff = get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);
157
158 ff_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",
159 run_count, run_index, run_mode, x, get_bits_count(&s->gb));
160 }
161
162 if (sign)
163 diff = -diff;
164
165 sample[1][x] = (predict(sample[1] + x, sample[0] + x) + diff) &
166 ((1 << bits) - 1);
167 }
168 s->run_index = run_index;
169 }
170
171 static void decode_plane(FFV1Context *s, uint8_t *src,
172 int w, int h, int stride, int plane_index)
173 {
174 int x, y;
175 int16_t *sample[2];
176 sample[0] = s->sample_buffer + 3;
177 sample[1] = s->sample_buffer + w + 6 + 3;
178
179 s->run_index = 0;
180
181 memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->sample_buffer));
182
183 for (y = 0; y < h; y++) {
184 int16_t *temp = sample[0]; // FIXME: try a normal buffer
185
186 sample[0] = sample[1];
187 sample[1] = temp;
188
189 sample[1][-1] = sample[0][0];
190 sample[0][w] = sample[0][w - 1];
191
192 // { START_TIMER
193 if (s->avctx->bits_per_raw_sample <= 8) {
194 decode_line(s, w, sample, plane_index, 8);
195 for (x = 0; x < w; x++)
196 src[x + stride * y] = sample[1][x];
197 } else {
198 decode_line(s, w, sample, plane_index,
199 s->avctx->bits_per_raw_sample);
200 if (s->packed_at_lsb) {
201 for (x = 0; x < w; x++)
202 ((uint16_t *)(src + stride * y))[x] = sample[1][x];
203 } else {
204 for (x = 0; x < w; x++)
205 ((uint16_t *)(src + stride * y))[x] = sample[1][x] << (16 - s->avctx->bits_per_raw_sample);
206 }
207 }
208 // STOP_TIMER("decode-line") }
209 }
210 }
211
212 static void decode_rgb_frame(FFV1Context *s, uint8_t *src[3], int w, int h,
213 int stride[3])
214 {
215 int x, y, p;
216 int16_t *sample[4][2];
217 int lbd = s->avctx->bits_per_raw_sample <= 8;
218 int bits = s->avctx->bits_per_raw_sample > 0
219 ? s->avctx->bits_per_raw_sample
220 : 8;
221 int offset = 1 << bits;
222
223 for (x = 0; x < 4; x++) {
224 sample[x][0] = s->sample_buffer + x * 2 * (w + 6) + 3;
225 sample[x][1] = s->sample_buffer + (x * 2 + 1) * (w + 6) + 3;
226 }
227
228 s->run_index = 0;
229
230 memset(s->sample_buffer, 0, 8 * (w + 6) * sizeof(*s->sample_buffer));
231
232 for (y = 0; y < h; y++) {
233 for (p = 0; p < 3 + s->transparency; p++) {
234 int16_t *temp = sample[p][0]; //FIXME try a normal buffer
235
236 sample[p][0] = sample[p][1];
237 sample[p][1] = temp;
238
239 sample[p][1][-1] = sample[p][0][0];
240 sample[p][0][w] = sample[p][0][w - 1];
241 if (lbd)
242 decode_line(s, w, sample[p], (p + 1) / 2, 9);
243 else
244 decode_line(s, w, sample[p], (p + 1) / 2, bits + 1);
245 }
246 for (x = 0; x < w; x++) {
247 int g = sample[0][1][x];
248 int b = sample[1][1][x];
249 int r = sample[2][1][x];
250 int a = sample[3][1][x];
251
252 b -= offset;
253 r -= offset;
254 g -= (b + r) >> 2;
255 b += g;
256 r += g;
257
258 if (lbd)
259 *((uint32_t *)(src[0] + x * 4 + stride[0] * y)) = b +
260 (g << 8) + (r << 16) + (a << 24);
261 else {
262 *((uint16_t *)(src[0] + x * 2 + stride[0] * y)) = b;
263 *((uint16_t *)(src[1] + x * 2 + stride[1] * y)) = g;
264 *((uint16_t *)(src[2] + x * 2 + stride[2] * y)) = r;
265 }
266 }
267 }
268 }
269
270 static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
271 {
272 RangeCoder *c = &fs->c;
273 uint8_t state[CONTEXT_SIZE];
274 unsigned ps, i, context_count;
275 memset(state, 128, sizeof(state));
276
277 if (fs->ac == AC_RANGE_CUSTOM_TAB) {
278 for (i = 1; i < 256; i++) {
279 fs->c.one_state[i] = f->state_transition[i];
280 fs->c.zero_state[256 - i] = 256 - fs->c.one_state[i];
281 }
282 }
283
284 fs->slice_x = get_symbol(c, state, 0) * f->width;
285 fs->slice_y = get_symbol(c, state, 0) * f->height;
286 fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
287 fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
288
289 fs->slice_x /= f->num_h_slices;
290 fs->slice_y /= f->num_v_slices;
291 fs->slice_width = fs->slice_width / f->num_h_slices - fs->slice_x;
292 fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
293 if ((unsigned)fs->slice_width > f->width ||
294 (unsigned)fs->slice_height > f->height)
295 return AVERROR_INVALIDDATA;
296 if ((unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width ||
297 (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
298 return AVERROR_INVALIDDATA;
299
300 for (i = 0; i < f->plane_count; i++) {
301 PlaneContext *const p = &fs->plane[i];
302 int idx = get_symbol(c, state, 0);
303 if (idx > (unsigned)f->quant_table_count) {
304 av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");
305 return AVERROR_INVALIDDATA;
306 }
307 p->quant_table_index = idx;
308 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));
309 context_count = f->context_count[idx];
310
311 if (p->context_count < context_count) {
312 av_freep(&p->state);
313 av_freep(&p->vlc_state);
314 }
315 p->context_count = context_count;
316 }
317
318 ps = get_symbol(c, state, 0);
319 if (ps == 1) {
320 f->cur->interlaced_frame = 1;
321 f->cur->top_field_first = 1;
322 } else if (ps == 2) {
323 f->cur->interlaced_frame = 1;
324 f->cur->top_field_first = 0;
325 } else if (ps == 3) {
326 f->cur->interlaced_frame = 0;
327 }
328 f->cur->sample_aspect_ratio.num = get_symbol(c, state, 0);
329 f->cur->sample_aspect_ratio.den = get_symbol(c, state, 0);
330
331 if (av_image_check_sar(f->width, f->height,
332 f->cur->sample_aspect_ratio) < 0) {
333 av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
334 f->cur->sample_aspect_ratio.num,
335 f->cur->sample_aspect_ratio.den);
336 f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };
337 }
338
339 return 0;
340 }
341
342 static int decode_slice(AVCodecContext *c, void *arg)
343 {
344 FFV1Context *fs = *(void **)arg;
345 FFV1Context *f = fs->avctx->priv_data;
346 int width, height, x, y, ret;
347 const int ps = (av_pix_fmt_desc_get(c->pix_fmt)->flags & AV_PIX_FMT_FLAG_PLANAR)
348 ? (c->bits_per_raw_sample > 8) + 1
349 : 4;
350 AVFrame *const p = f->cur;
351
352 if (f->version > 2) {
353 if (decode_slice_header(f, fs) < 0) {
354 fs->slice_damaged = 1;
355 return AVERROR_INVALIDDATA;
356 }
357 }
358 if ((ret = ffv1_init_slice_state(f, fs)) < 0)
359 return ret;
360 if (f->cur->key_frame)
361 ffv1_clear_slice_state(f, fs);
362 width = fs->slice_width;
363 height = fs->slice_height;
364 x = fs->slice_x;
365 y = fs->slice_y;
366
367 if (fs->ac == AC_GOLOMB_RICE) {
368 if (f->version == 3 && f->minor_version > 1 || f->version > 3)
369 get_rac(&fs->c, (uint8_t[]) { 129 });
370 fs->ac_byte_count = f->version > 2 || (!x && !y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;
371 init_get_bits(&fs->gb, fs->c.bytestream_start + fs->ac_byte_count,
372 (fs->c.bytestream_end - fs->c.bytestream_start -
373 fs->ac_byte_count) * 8);
374 }
375
376 av_assert1(width && height);
377 if (f->colorspace == 0) {
378 const int chroma_width = AV_CEIL_RSHIFT(width, f->chroma_h_shift);
379 const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);
380 const int cx = x >> f->chroma_h_shift;
381 const int cy = y >> f->chroma_v_shift;
382 decode_plane(fs, p->data[0] + ps * x + y * p->linesize[0], width,
383 height, p->linesize[0],
384 0);
385
386 if (f->chroma_planes) {
387 decode_plane(fs, p->data[1] + ps * cx + cy * p->linesize[1],
388 chroma_width, chroma_height, p->linesize[1],
389 1);
390 decode_plane(fs, p->data[2] + ps * cx + cy * p->linesize[2],
391 chroma_width, chroma_height, p->linesize[2],
392 1);
393 }
394 if (fs->transparency)
395 decode_plane(fs, p->data[3] + ps * x + y * p->linesize[3], width,
396 height, p->linesize[3],
397 2);
398 } else {
399 uint8_t *planes[3] = { p->data[0] + ps * x + y * p->linesize[0],
400 p->data[1] + ps * x + y * p->linesize[1],
401 p->data[2] + ps * x + y * p->linesize[2] };
402 decode_rgb_frame(fs, planes, width, height, p->linesize);
403 }
404 if (fs->ac != AC_GOLOMB_RICE && f->version > 2) {
405 int v;
406 get_rac(&fs->c, (uint8_t[]) { 129 });
407 v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5 * f->ec;
408 if (v) {
409 av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n",
410 v);
411 fs->slice_damaged = 1;
412 }
413 }
414
415 emms_c();
416
417 return 0;
418 }
419
420 static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
421 {
422 int v;
423 int i = 0;
424 uint8_t state[CONTEXT_SIZE];
425
426 memset(state, 128, sizeof(state));
427
428 for (v = 0; i < 128; v++) {
429 unsigned len = get_symbol(c, state, 0) + 1;
430
431 if (len > 128 - i)
432 return -1;
433
434 while (len--) {
435 quant_table[i] = scale * v;
436 i++;
437 }
438 }
439
440 for (i = 1; i < 128; i++)
441 quant_table[256 - i] = -quant_table[i];
442 quant_table[128] = -quant_table[127];
443
444 return 2 * v - 1;
445 }
446
447 static int read_quant_tables(RangeCoder *c,
448 int16_t quant_table[MAX_CONTEXT_INPUTS][256])
449 {
450 int i;
451 int context_count = 1;
452
453 for (i = 0; i < 5; i++) {
454 context_count *= read_quant_table(c, quant_table[i], context_count);
455 if (context_count > 32768U) {
456 return -1;
457 }
458 }
459 return (context_count + 1) / 2;
460 }
461
462 static int read_extra_header(FFV1Context *f)
463 {
464 RangeCoder *const c = &f->c;
465 uint8_t state[CONTEXT_SIZE];
466 int i, j, k, ret;
467 uint8_t state2[32][CONTEXT_SIZE];
468
469 memset(state2, 128, sizeof(state2));
470 memset(state, 128, sizeof(state));
471
472 ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);
473 ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
474
475 f->version = get_symbol(c, state, 0);
476 if (f->version > 2) {
477 c->bytestream_end -= 4;
478 f->minor_version = get_symbol(c, state, 0);
479 }
480 f->ac = get_symbol(c, state, 0);
481
482 if (f->ac == AC_RANGE_CUSTOM_TAB) {
483 for (i = 1; i < 256; i++)
484 f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
485 }
486
487 f->colorspace = get_symbol(c, state, 0); //YUV cs type
488 f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);
489 f->chroma_planes = get_rac(c, state);
490 f->chroma_h_shift = get_symbol(c, state, 0);
491 f->chroma_v_shift = get_symbol(c, state, 0);
492 f->transparency = get_rac(c, state);
493 f->plane_count = 2 + f->transparency;
494 f->num_h_slices = 1 + get_symbol(c, state, 0);
495 f->num_v_slices = 1 + get_symbol(c, state, 0);
496
497 if (f->num_h_slices > (unsigned)f->width ||
498 f->num_v_slices > (unsigned)f->height) {
499 av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");
500 return AVERROR_INVALIDDATA;
501 }
502
503 f->quant_table_count = get_symbol(c, state, 0);
504 if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES)
505 return AVERROR_INVALIDDATA;
506 for (i = 0; i < f->quant_table_count; i++) {
507 f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);
508 if (f->context_count[i] < 0) {
509 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
510 return AVERROR_INVALIDDATA;
511 }
512 }
513 if ((ret = ffv1_allocate_initial_states(f)) < 0)
514 return ret;
515
516 for (i = 0; i < f->quant_table_count; i++)
517 if (get_rac(c, state)) {
518 for (j = 0; j < f->context_count[i]; j++)
519 for (k = 0; k < CONTEXT_SIZE; k++) {
520 int pred = j ? f->initial_states[i][j - 1][k] : 128;
521 f->initial_states[i][j][k] =
522 (pred + get_symbol(c, state2[k], 1)) & 0xFF;
523 }
524 }
525
526 if (f->version > 2) {
527 f->ec = get_symbol(c, state, 0);
528 }
529
530 if (f->version > 2) {
531 unsigned v;
532 v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0,
533 f->avctx->extradata, f->avctx->extradata_size);
534 if (v) {
535 av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
536 return AVERROR_INVALIDDATA;
537 }
538 }
539
540 return 0;
541 }
542
543
544 static int read_header(FFV1Context *f)
545 {
546 uint8_t state[CONTEXT_SIZE];
547 int i, j, context_count = -1;
548 RangeCoder *const c = &f->slice_context[0]->c;
549
550 memset(state, 128, sizeof(state));
551
552 if (f->version < 2) {
553 int chroma_planes, chroma_h_shift, chroma_v_shift, transparency, colorspace, bits_per_raw_sample;
554 unsigned v = get_symbol(c, state, 0);
555 if (v > 1) {
556 av_log(f->avctx, AV_LOG_ERROR,
557 "invalid version %d in version 1 header\n", v);
558 return AVERROR_INVALIDDATA;
559 }
560 f->version = v;
561
562 f->ac = get_symbol(c, state, 0);
563
564 if (f->ac == AC_RANGE_CUSTOM_TAB) {
565 for (i = 1; i < 256; i++)
566 f->state_transition[i] =
567 get_symbol(c, state, 1) + c->one_state[i];
568 }
569
570 colorspace = get_symbol(c, state, 0); //YUV cs type
571 bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
572 chroma_planes = get_rac(c, state);
573 chroma_h_shift = get_symbol(c, state, 0);
574 chroma_v_shift = get_symbol(c, state, 0);
575 transparency = get_rac(c, state);
576
577 if (f->plane_count) {
578 if (colorspace != f->colorspace ||
579 bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
580 chroma_planes != f->chroma_planes ||
581 chroma_h_shift != f->chroma_h_shift ||
582 chroma_v_shift != f->chroma_v_shift ||
583 transparency != f->transparency) {
584 av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
585 return AVERROR_INVALIDDATA;
586 }
587 }
588
589 f->colorspace = colorspace;
590 f->avctx->bits_per_raw_sample = bits_per_raw_sample;
591 f->chroma_planes = chroma_planes;
592 f->chroma_h_shift = chroma_h_shift;
593 f->chroma_v_shift = chroma_v_shift;
594 f->transparency = transparency;
595
596 f->plane_count = 2 + f->transparency;
597 }
598
599 if (f->colorspace == 0) {
600 if (!f->transparency && !f->chroma_planes) {
601 if (f->avctx->bits_per_raw_sample <= 8)
602 f->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
603 else
604 f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
605 } else if (f->avctx->bits_per_raw_sample <= 8 && !f->transparency) {
606 switch (16 * f->chroma_h_shift + f->chroma_v_shift) {
607 case 0x00:
608 f->avctx->pix_fmt = AV_PIX_FMT_YUV444P;
609 break;
610 case 0x01:
611 f->avctx->pix_fmt = AV_PIX_FMT_YUV440P;
612 break;
613 case 0x10:
614 f->avctx->pix_fmt = AV_PIX_FMT_YUV422P;
615 break;
616 case 0x11:
617 f->avctx->pix_fmt = AV_PIX_FMT_YUV420P;
618 break;
619 case 0x20:
620 f->avctx->pix_fmt = AV_PIX_FMT_YUV411P;
621 break;
622 case 0x22:
623 f->avctx->pix_fmt = AV_PIX_FMT_YUV410P;
624 break;
625 default:
626 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
627 return AVERROR(ENOSYS);
628 }
629 } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
630 switch (16 * f->chroma_h_shift + f->chroma_v_shift) {
631 case 0x00:
632 f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
633 break;
634 case 0x10:
635 f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
636 break;
637 case 0x11:
638 f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
639 break;
640 default:
641 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
642 return AVERROR(ENOSYS);
643 }
644 } else if (f->avctx->bits_per_raw_sample == 9) {
645 f->packed_at_lsb = 1;
646 switch (16 * f->chroma_h_shift + f->chroma_v_shift) {
647 case 0x00:
648 f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
649 break;
650 case 0x10:
651 f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
652 break;
653 case 0x11:
654 f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
655 break;
656 default:
657 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
658 return AVERROR(ENOSYS);
659 }
660 } else if (f->avctx->bits_per_raw_sample == 10) {
661 f->packed_at_lsb = 1;
662 switch (16 * f->chroma_h_shift + f->chroma_v_shift) {
663 case 0x00:
664 f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
665 break;
666 case 0x10:
667 f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
668 break;
669 case 0x11:
670 f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
671 break;
672 default:
673 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
674 return AVERROR(ENOSYS);
675 }
676 } else {
677 switch (16 * f->chroma_h_shift + f->chroma_v_shift) {
678 case 0x00:
679 f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
680 break;
681 case 0x10:
682 f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
683 break;
684 case 0x11:
685 f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
686 break;
687 default:
688 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
689 return AVERROR(ENOSYS);
690 }
691 }
692 } else if (f->colorspace == 1) {
693 if (f->chroma_h_shift || f->chroma_v_shift) {
694 av_log(f->avctx, AV_LOG_ERROR,
695 "chroma subsampling not supported in this colorspace\n");
696 return AVERROR(ENOSYS);
697 }
698 switch (f->avctx->bits_per_raw_sample) {
699 case 0:
700 case 8:
701 f->avctx->pix_fmt = AV_PIX_FMT_RGB32;
702 break;
703 case 9:
704 f->avctx->pix_fmt = AV_PIX_FMT_GBRP9;
705 break;
706 case 10:
707 f->avctx->pix_fmt = AV_PIX_FMT_GBRP10;
708 break;
709 default:
710 av_log(f->avctx, AV_LOG_ERROR,
711 "bit depth %d not supported\n",
712 f->avctx->bits_per_raw_sample);
713 return AVERROR(ENOSYS);
714 }
715 } else {
716 av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
717 return AVERROR(ENOSYS);
718 }
719
720 ff_dlog(f->avctx, "%d %d %d\n",
721 f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);
722 if (f->version < 2) {
723 context_count = read_quant_tables(c, f->quant_table);
724 if (context_count < 0) {
725 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
726 return AVERROR_INVALIDDATA;
727 }
728 } else if (f->version < 3) {
729 f->slice_count = get_symbol(c, state, 0);
730 } else {
731 const uint8_t *p = c->bytestream_end;
732 for (f->slice_count = 0;
733 f->slice_count < MAX_SLICES && 3 < p - c->bytestream_start;
734 f->slice_count++) {
735 int trailer = 3 + 5 * !!f->ec;
736 int size = AV_RB24(p - trailer);
737 if (size + trailer > p - c->bytestream_start)
738 break;
739 p -= size + trailer;
740 }
741 }
742 if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0) {
743 av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid\n",
744 f->slice_count);
745 return AVERROR_INVALIDDATA;
746 }
747
748 for (j = 0; j < f->slice_count; j++) {
749 FFV1Context *fs = f->slice_context[j];
750 fs->ac = f->ac;
751 fs->packed_at_lsb = f->packed_at_lsb;
752
753 fs->slice_damaged = 0;
754
755 if (f->version == 2) {
756 fs->slice_x = get_symbol(c, state, 0) * f->width;
757 fs->slice_y = get_symbol(c, state, 0) * f->height;
758 fs->slice_width =
759 (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
760 fs->slice_height =
761 (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
762
763 fs->slice_x /= f->num_h_slices;
764 fs->slice_y /= f->num_v_slices;
765 fs->slice_width = fs->slice_width / f->num_h_slices - fs->slice_x;
766 fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
767 if ((unsigned)fs->slice_width > f->width ||
768 (unsigned)fs->slice_height > f->height)
769 return AVERROR_INVALIDDATA;
770 if ((unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
771 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height >
772 f->height)
773 return AVERROR_INVALIDDATA;
774 }
775
776 for (i = 0; i < f->plane_count; i++) {
777 PlaneContext *const p = &fs->plane[i];
778
779 if (f->version == 2) {
780 int idx = get_symbol(c, state, 0);
781 if (idx > (unsigned)f->quant_table_count) {
782 av_log(f->avctx, AV_LOG_ERROR,
783 "quant_table_index out of range\n");
784 return AVERROR_INVALIDDATA;
785 }
786 p->quant_table_index = idx;
787 memcpy(p->quant_table, f->quant_tables[idx],
788 sizeof(p->quant_table));
789 context_count = f->context_count[idx];
790 } else {
791 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
792 }
793
794 if (f->version <= 2) {
795 av_assert0(context_count >= 0);
796 if (p->context_count < context_count) {
797 av_freep(&p->state);
798 av_freep(&p->vlc_state);
799 }
800 p->context_count = context_count;
801 }
802 }
803 }
804 return 0;
805 }
806
807 static av_cold int ffv1_decode_init(AVCodecContext *avctx)
808 {
809 FFV1Context *f = avctx->priv_data;
810 int ret;
811
812 ffv1_common_init(avctx);
813
814 f->last_picture = av_frame_alloc();
815 if (!f->last_picture)
816 return AVERROR(ENOMEM);
817
818 if (avctx->extradata && (ret = read_extra_header(f)) < 0)
819 return ret;
820
821 if ((ret = ffv1_init_slice_contexts(f)) < 0)
822 return ret;
823
824 return 0;
825 }
826
827 static int ffv1_decode_frame(AVCodecContext *avctx, void *data,
828 int *got_frame, AVPacket *avpkt)
829 {
830 uint8_t *buf = avpkt->data;
831 int buf_size = avpkt->size;
832 FFV1Context *f = avctx->priv_data;
833 RangeCoder *const c = &f->slice_context[0]->c;
834 int i, ret;
835 uint8_t keystate = 128;
836 uint8_t *buf_p;
837 AVFrame *const p = data;
838
839 f->cur = p;
840
841 ff_init_range_decoder(c, buf, buf_size);
842 ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
843
844 p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
845 if (get_rac(c, &keystate)) {
846 p->key_frame = 1;
847 f->key_frame_ok = 0;
848 if ((ret = read_header(f)) < 0)
849 return ret;
850 f->key_frame_ok = 1;
851 } else {
852 if (!f->key_frame_ok) {
853 av_log(avctx, AV_LOG_ERROR,
854 "Cannot decode non-keyframe without valid keyframe\n");
855 return AVERROR_INVALIDDATA;
856 }
857 p->key_frame = 0;
858 }
859
860 if ((ret = ff_get_buffer(avctx, p, AV_GET_BUFFER_FLAG_REF)) < 0) {
861 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
862 return ret;
863 }
864
865 if (avctx->debug & FF_DEBUG_PICT_INFO)
866 av_log(avctx, AV_LOG_DEBUG,
867 "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
868 f->version, p->key_frame, f->ac, f->ec, f->slice_count,
869 f->avctx->bits_per_raw_sample);
870
871 buf_p = buf + buf_size;
872 for (i = f->slice_count - 1; i >= 0; i--) {
873 FFV1Context *fs = f->slice_context[i];
874 int trailer = 3 + 5 * !!f->ec;
875 int v;
876
877 if (i || f->version > 2)
878 v = AV_RB24(buf_p - trailer) + trailer;
879 else
880 v = buf_p - c->bytestream_start;
881 if (buf_p - c->bytestream_start < v) {
882 av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
883 return AVERROR_INVALIDDATA;
884 }
885 buf_p -= v;
886
887 if (f->ec) {
888 unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
889 if (crc) {
890 av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", crc);
891 fs->slice_damaged = 1;
892 }
893 }
894
895 if (i) {
896 ff_init_range_decoder(&fs->c, buf_p, v);
897 } else
898 fs->c.bytestream_end = buf_p + v;
899
900 fs->cur = p;
901 }
902
903 avctx->execute(avctx, decode_slice, &f->slice_context[0], NULL,
904 f->slice_count,
905 sizeof(void *));
906
907 for (i = f->slice_count - 1; i >= 0; i--) {
908 FFV1Context *fs = f->slice_context[i];
909 int j;
910 if (fs->slice_damaged && f->last_picture->data[0]) {
911 const uint8_t *src[4];
912 uint8_t *dst[4];
913 for (j = 0; j < 4; j++) {
914 int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
915 int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
916 dst[j] = p->data[j] + p->linesize[j] *
917 (fs->slice_y >> sv) + (fs->slice_x >> sh);
918 src[j] = f->last_picture->data[j] +
919 f->last_picture->linesize[j] *
920 (fs->slice_y >> sv) + (fs->slice_x >> sh);
921 }
922 av_image_copy(dst, p->linesize, src,
923 f->last_picture->linesize,
924 avctx->pix_fmt, fs->slice_width,
925 fs->slice_height);
926 }
927 }
928
929 f->picture_number++;
930
931 av_frame_unref(f->last_picture);
932 if ((ret = av_frame_ref(f->last_picture, p)) < 0)
933 return ret;
934 f->cur = NULL;
935
936 *got_frame = 1;
937
938 return buf_size;
939 }
940
941 static av_cold int ffv1_decode_close(AVCodecContext *avctx)
942 {
943 FFV1Context *s = avctx->priv_data;;
944
945 av_frame_free(&s->last_picture);
946
947 ffv1_close(avctx);
948
949 return 0;
950 }
951
952 AVCodec ff_ffv1_decoder = {
953 .name = "ffv1",
954 .long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
955 .type = AVMEDIA_TYPE_VIDEO,
956 .id = AV_CODEC_ID_FFV1,
957 .priv_data_size = sizeof(FFV1Context),
958 .init = ffv1_decode_init,
959 .close = ffv1_decode_close,
960 .decode = ffv1_decode_frame,
961 .capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |
962 AV_CODEC_CAP_SLICE_THREADS,
963 };