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path: root/libavcodec/ffv1dec.c (plain)
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1/*
2 * FFV1 decoder
3 *
4 * Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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/crc.h"
30#include "libavutil/opt.h"
31#include "libavutil/imgutils.h"
32#include "libavutil/pixdesc.h"
33#include "libavutil/timer.h"
34#include "avcodec.h"
35#include "internal.h"
36#include "get_bits.h"
37#include "rangecoder.h"
38#include "golomb.h"
39#include "mathops.h"
40#include "ffv1.h"
41
42static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state,
43 int is_signed)
44{
45 if (get_rac(c, state + 0))
46 return 0;
47 else {
48 int i, e, a;
49 e = 0;
50 while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..10
51 e++;
52 if (e > 31)
53 return AVERROR_INVALIDDATA;
54 }
55
56 a = 1;
57 for (i = e - 1; i >= 0; i--)
58 a += a + get_rac(c, state + 22 + FFMIN(i, 9)); // 22..31
59
60 e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21
61 return (a ^ e) - e;
62 }
63}
64
65static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
66{
67 return get_symbol_inline(c, state, is_signed);
68}
69
70static inline int get_vlc_symbol(GetBitContext *gb, VlcState *const state,
71 int bits)
72{
73 int k, i, v, ret;
74
75 i = state->count;
76 k = 0;
77 while (i < state->error_sum) { // FIXME: optimize
78 k++;
79 i += i;
80 }
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 v ^= ((2 * state->drift + state->count) >> 31);
87
88 ret = fold(v + state->bias, bits);
89
90 update_vlc_state(state, v);
91
92 return ret;
93}
94
95#define TYPE int16_t
96#define RENAME(name) name
97#include "ffv1dec_template.c"
98#undef TYPE
99#undef RENAME
100
101#define TYPE int32_t
102#define RENAME(name) name ## 32
103#include "ffv1dec_template.c"
104
105static void decode_plane(FFV1Context *s, uint8_t *src,
106 int w, int h, int stride, int plane_index,
107 int pixel_stride)
108{
109 int x, y;
110 int16_t *sample[2];
111 sample[0] = s->sample_buffer + 3;
112 sample[1] = s->sample_buffer + w + 6 + 3;
113
114 s->run_index = 0;
115
116 memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->sample_buffer));
117
118 for (y = 0; y < h; y++) {
119 int16_t *temp = sample[0]; // FIXME: try a normal buffer
120
121 sample[0] = sample[1];
122 sample[1] = temp;
123
124 sample[1][-1] = sample[0][0];
125 sample[0][w] = sample[0][w - 1];
126
127// { START_TIMER
128 if (s->avctx->bits_per_raw_sample <= 8) {
129 decode_line(s, w, sample, plane_index, 8);
130 for (x = 0; x < w; x++)
131 src[x*pixel_stride + stride * y] = sample[1][x];
132 } else {
133 decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);
134 if (s->packed_at_lsb) {
135 for (x = 0; x < w; x++) {
136 ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x];
137 }
138 } else {
139 for (x = 0; x < w; x++) {
140 ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x] << (16 - s->avctx->bits_per_raw_sample) | ((uint16_t **)sample)[1][x] >> (2 * s->avctx->bits_per_raw_sample - 16);
141 }
142 }
143 }
144// STOP_TIMER("decode-line") }
145 }
146}
147
148static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
149{
150 RangeCoder *c = &fs->c;
151 uint8_t state[CONTEXT_SIZE];
152 unsigned ps, i, context_count;
153 memset(state, 128, sizeof(state));
154
155 av_assert0(f->version > 2);
156
157 fs->slice_x = get_symbol(c, state, 0) * f->width ;
158 fs->slice_y = get_symbol(c, state, 0) * f->height;
159 fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
160 fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
161
162 fs->slice_x /= f->num_h_slices;
163 fs->slice_y /= f->num_v_slices;
164 fs->slice_width = fs->slice_width /f->num_h_slices - fs->slice_x;
165 fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;
166 if ((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)
167 return -1;
168 if ( (unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
169 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
170 return -1;
171
172 for (i = 0; i < f->plane_count; i++) {
173 PlaneContext * const p = &fs->plane[i];
174 int idx = get_symbol(c, state, 0);
175 if (idx >= (unsigned)f->quant_table_count) {
176 av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");
177 return -1;
178 }
179 p->quant_table_index = idx;
180 memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));
181 context_count = f->context_count[idx];
182
183 if (p->context_count < context_count) {
184 av_freep(&p->state);
185 av_freep(&p->vlc_state);
186 }
187 p->context_count = context_count;
188 }
189
190 ps = get_symbol(c, state, 0);
191 if (ps == 1) {
192 f->cur->interlaced_frame = 1;
193 f->cur->top_field_first = 1;
194 } else if (ps == 2) {
195 f->cur->interlaced_frame = 1;
196 f->cur->top_field_first = 0;
197 } else if (ps == 3) {
198 f->cur->interlaced_frame = 0;
199 }
200 f->cur->sample_aspect_ratio.num = get_symbol(c, state, 0);
201 f->cur->sample_aspect_ratio.den = get_symbol(c, state, 0);
202
203 if (av_image_check_sar(f->width, f->height,
204 f->cur->sample_aspect_ratio) < 0) {
205 av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
206 f->cur->sample_aspect_ratio.num,
207 f->cur->sample_aspect_ratio.den);
208 f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };
209 }
210
211 if (fs->version > 3) {
212 fs->slice_reset_contexts = get_rac(c, state);
213 fs->slice_coding_mode = get_symbol(c, state, 0);
214 if (fs->slice_coding_mode != 1) {
215 fs->slice_rct_by_coef = get_symbol(c, state, 0);
216 fs->slice_rct_ry_coef = get_symbol(c, state, 0);
217 if ((uint64_t)fs->slice_rct_by_coef + (uint64_t)fs->slice_rct_ry_coef > 4) {
218 av_log(f->avctx, AV_LOG_ERROR, "slice_rct_y_coef out of range\n");
219 return AVERROR_INVALIDDATA;
220 }
221 }
222 }
223
224 return 0;
225}
226
227static int decode_slice(AVCodecContext *c, void *arg)
228{
229 FFV1Context *fs = *(void **)arg;
230 FFV1Context *f = fs->avctx->priv_data;
231 int width, height, x, y, ret;
232 const int ps = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;
233 AVFrame * const p = f->cur;
234 int i, si;
235
236 for( si=0; fs != f->slice_context[si]; si ++)
237 ;
238
239 if(f->fsrc && !p->key_frame)
240 ff_thread_await_progress(&f->last_picture, si, 0);
241
242 if(f->fsrc && !p->key_frame) {
243 FFV1Context *fssrc = f->fsrc->slice_context[si];
244 FFV1Context *fsdst = f->slice_context[si];
245 av_assert1(fsdst->plane_count == fssrc->plane_count);
246 av_assert1(fsdst == fs);
247
248 if (!p->key_frame)
249 fsdst->slice_damaged |= fssrc->slice_damaged;
250
251 for (i = 0; i < f->plane_count; i++) {
252 PlaneContext *psrc = &fssrc->plane[i];
253 PlaneContext *pdst = &fsdst->plane[i];
254
255 av_free(pdst->state);
256 av_free(pdst->vlc_state);
257 memcpy(pdst, psrc, sizeof(*pdst));
258 pdst->state = NULL;
259 pdst->vlc_state = NULL;
260
261 if (fssrc->ac) {
262 pdst->state = av_malloc_array(CONTEXT_SIZE, psrc->context_count);
263 memcpy(pdst->state, psrc->state, CONTEXT_SIZE * psrc->context_count);
264 } else {
265 pdst->vlc_state = av_malloc_array(sizeof(*pdst->vlc_state), psrc->context_count);
266 memcpy(pdst->vlc_state, psrc->vlc_state, sizeof(*pdst->vlc_state) * psrc->context_count);
267 }
268 }
269 }
270
271 fs->slice_rct_by_coef = 1;
272 fs->slice_rct_ry_coef = 1;
273
274 if (f->version > 2) {
275 if (ff_ffv1_init_slice_state(f, fs) < 0)
276 return AVERROR(ENOMEM);
277 if (decode_slice_header(f, fs) < 0) {
278 fs->slice_x = fs->slice_y = fs->slice_height = fs->slice_width = 0;
279 fs->slice_damaged = 1;
280 return AVERROR_INVALIDDATA;
281 }
282 }
283 if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
284 return ret;
285 if (f->cur->key_frame || fs->slice_reset_contexts)
286 ff_ffv1_clear_slice_state(f, fs);
287
288 width = fs->slice_width;
289 height = fs->slice_height;
290 x = fs->slice_x;
291 y = fs->slice_y;
292
293 if (fs->ac == AC_GOLOMB_RICE) {
294 if (f->version == 3 && f->micro_version > 1 || f->version > 3)
295 get_rac(&fs->c, (uint8_t[]) { 129 });
296 fs->ac_byte_count = f->version > 2 || (!x && !y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;
297 init_get_bits(&fs->gb,
298 fs->c.bytestream_start + fs->ac_byte_count,
299 (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);
300 }
301
302 av_assert1(width && height);
303 if (f->colorspace == 0 && (f->chroma_planes || !fs->transparency)) {
304 const int chroma_width = AV_CEIL_RSHIFT(width, f->chroma_h_shift);
305 const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);
306 const int cx = x >> f->chroma_h_shift;
307 const int cy = y >> f->chroma_v_shift;
308 decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1);
309
310 if (f->chroma_planes) {
311 decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1);
312 decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1);
313 }
314 if (fs->transparency)
315 decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], (f->version >= 4 && !f->chroma_planes) ? 1 : 2, 1);
316 } else if (f->colorspace == 0) {
317 decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] , width, height, p->linesize[0], 0, 2);
318 decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] + 1, width, height, p->linesize[0], 1, 2);
319 } else if (f->use32bit) {
320 uint8_t *planes[3] = { p->data[0] + ps * x + y * p->linesize[0],
321 p->data[1] + ps * x + y * p->linesize[1],
322 p->data[2] + ps * x + y * p->linesize[2] };
323 decode_rgb_frame32(fs, planes, width, height, p->linesize);
324 } else {
325 uint8_t *planes[3] = { p->data[0] + ps * x + y * p->linesize[0],
326 p->data[1] + ps * x + y * p->linesize[1],
327 p->data[2] + ps * x + y * p->linesize[2] };
328 decode_rgb_frame(fs, planes, width, height, p->linesize);
329 }
330 if (fs->ac != AC_GOLOMB_RICE && f->version > 2) {
331 int v;
332 get_rac(&fs->c, (uint8_t[]) { 129 });
333 v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;
334 if (v) {
335 av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);
336 fs->slice_damaged = 1;
337 }
338 }
339
340 emms_c();
341
342 ff_thread_report_progress(&f->picture, si, 0);
343
344 return 0;
345}
346
347static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
348{
349 int v;
350 int i = 0;
351 uint8_t state[CONTEXT_SIZE];
352
353 memset(state, 128, sizeof(state));
354
355 for (v = 0; i < 128; v++) {
356 unsigned len = get_symbol(c, state, 0) + 1;
357
358 if (len > 128 - i || !len)
359 return AVERROR_INVALIDDATA;
360
361 while (len--) {
362 quant_table[i] = scale * v;
363 i++;
364 }
365 }
366
367 for (i = 1; i < 128; i++)
368 quant_table[256 - i] = -quant_table[i];
369 quant_table[128] = -quant_table[127];
370
371 return 2 * v - 1;
372}
373
374static int read_quant_tables(RangeCoder *c,
375 int16_t quant_table[MAX_CONTEXT_INPUTS][256])
376{
377 int i;
378 int context_count = 1;
379
380 for (i = 0; i < 5; i++) {
381 int ret = read_quant_table(c, quant_table[i], context_count);
382 if (ret < 0)
383 return ret;
384 context_count *= ret;
385 if (context_count > 32768U) {
386 return AVERROR_INVALIDDATA;
387 }
388 }
389 return (context_count + 1) / 2;
390}
391
392static int read_extra_header(FFV1Context *f)
393{
394 RangeCoder *const c = &f->c;
395 uint8_t state[CONTEXT_SIZE];
396 int i, j, k, ret;
397 uint8_t state2[32][CONTEXT_SIZE];
398 unsigned crc = 0;
399
400 memset(state2, 128, sizeof(state2));
401 memset(state, 128, sizeof(state));
402
403 ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);
404 ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
405
406 f->version = get_symbol(c, state, 0);
407 if (f->version < 2) {
408 av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");
409 return AVERROR_INVALIDDATA;
410 }
411 if (f->version > 2) {
412 c->bytestream_end -= 4;
413 f->micro_version = get_symbol(c, state, 0);
414 if (f->micro_version < 0)
415 return AVERROR_INVALIDDATA;
416 }
417 f->ac = get_symbol(c, state, 0);
418
419 if (f->ac == AC_RANGE_CUSTOM_TAB) {
420 for (i = 1; i < 256; i++)
421 f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
422 }
423
424 f->colorspace = get_symbol(c, state, 0); //YUV cs type
425 f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);
426 f->chroma_planes = get_rac(c, state);
427 f->chroma_h_shift = get_symbol(c, state, 0);
428 f->chroma_v_shift = get_symbol(c, state, 0);
429 f->transparency = get_rac(c, state);
430 f->plane_count = 1 + (f->chroma_planes || f->version<4) + f->transparency;
431 f->num_h_slices = 1 + get_symbol(c, state, 0);
432 f->num_v_slices = 1 + get_symbol(c, state, 0);
433
434 if (f->chroma_h_shift > 4U || f->chroma_v_shift > 4U) {
435 av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
436 f->chroma_h_shift, f->chroma_v_shift);
437 return AVERROR_INVALIDDATA;
438 }
439
440 if (f->num_h_slices > (unsigned)f->width || !f->num_h_slices ||
441 f->num_v_slices > (unsigned)f->height || !f->num_v_slices
442 ) {
443 av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");
444 return AVERROR_INVALIDDATA;
445 }
446
447 f->quant_table_count = get_symbol(c, state, 0);
448 if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count) {
449 av_log(f->avctx, AV_LOG_ERROR, "quant table count %d is invalid\n", f->quant_table_count);
450 f->quant_table_count = 0;
451 return AVERROR_INVALIDDATA;
452 }
453
454 for (i = 0; i < f->quant_table_count; i++) {
455 f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);
456 if (f->context_count[i] < 0) {
457 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
458 return AVERROR_INVALIDDATA;
459 }
460 }
461 if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)
462 return ret;
463
464 for (i = 0; i < f->quant_table_count; i++)
465 if (get_rac(c, state)) {
466 for (j = 0; j < f->context_count[i]; j++)
467 for (k = 0; k < CONTEXT_SIZE; k++) {
468 int pred = j ? f->initial_states[i][j - 1][k] : 128;
469 f->initial_states[i][j][k] =
470 (pred + get_symbol(c, state2[k], 1)) & 0xFF;
471 }
472 }
473
474 if (f->version > 2) {
475 f->ec = get_symbol(c, state, 0);
476 if (f->micro_version > 2)
477 f->intra = get_symbol(c, state, 0);
478 }
479
480 if (f->version > 2) {
481 unsigned v;
482 v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0,
483 f->avctx->extradata, f->avctx->extradata_size);
484 if (v || f->avctx->extradata_size < 4) {
485 av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);
486 return AVERROR_INVALIDDATA;
487 }
488 crc = AV_RB32(f->avctx->extradata + f->avctx->extradata_size - 4);
489 }
490
491 if (f->avctx->debug & FF_DEBUG_PICT_INFO)
492 av_log(f->avctx, AV_LOG_DEBUG,
493 "global: ver:%d.%d, coder:%d, colorspace: %d bpr:%d chroma:%d(%d:%d), alpha:%d slices:%dx%d qtabs:%d ec:%d intra:%d CRC:0x%08X\n",
494 f->version, f->micro_version,
495 f->ac,
496 f->colorspace,
497 f->avctx->bits_per_raw_sample,
498 f->chroma_planes, f->chroma_h_shift, f->chroma_v_shift,
499 f->transparency,
500 f->num_h_slices, f->num_v_slices,
501 f->quant_table_count,
502 f->ec,
503 f->intra,
504 crc
505 );
506 return 0;
507}
508
509static int read_header(FFV1Context *f)
510{
511 uint8_t state[CONTEXT_SIZE];
512 int i, j, context_count = -1; //-1 to avoid warning
513 RangeCoder *const c = &f->slice_context[0]->c;
514
515 memset(state, 128, sizeof(state));
516
517 if (f->version < 2) {
518 int chroma_planes, chroma_h_shift, chroma_v_shift, transparency, colorspace, bits_per_raw_sample;
519 unsigned v= get_symbol(c, state, 0);
520 if (v >= 2) {
521 av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);
522 return AVERROR_INVALIDDATA;
523 }
524 f->version = v;
525 f->ac = get_symbol(c, state, 0);
526
527 if (f->ac == AC_RANGE_CUSTOM_TAB) {
528 for (i = 1; i < 256; i++)
529 f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
530 }
531
532 colorspace = get_symbol(c, state, 0); //YUV cs type
533 bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;
534 chroma_planes = get_rac(c, state);
535 chroma_h_shift = get_symbol(c, state, 0);
536 chroma_v_shift = get_symbol(c, state, 0);
537 transparency = get_rac(c, state);
538 if (colorspace == 0 && f->avctx->skip_alpha)
539 transparency = 0;
540
541 if (f->plane_count) {
542 if (colorspace != f->colorspace ||
543 bits_per_raw_sample != f->avctx->bits_per_raw_sample ||
544 chroma_planes != f->chroma_planes ||
545 chroma_h_shift != f->chroma_h_shift ||
546 chroma_v_shift != f->chroma_v_shift ||
547 transparency != f->transparency) {
548 av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");
549 return AVERROR_INVALIDDATA;
550 }
551 }
552
553 if (chroma_h_shift > 4U || chroma_v_shift > 4U) {
554 av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",
555 chroma_h_shift, chroma_v_shift);
556 return AVERROR_INVALIDDATA;
557 }
558
559 f->colorspace = colorspace;
560 f->avctx->bits_per_raw_sample = bits_per_raw_sample;
561 f->chroma_planes = chroma_planes;
562 f->chroma_h_shift = chroma_h_shift;
563 f->chroma_v_shift = chroma_v_shift;
564 f->transparency = transparency;
565
566 f->plane_count = 2 + f->transparency;
567 }
568
569 if (f->colorspace == 0) {
570 if (!f->transparency && !f->chroma_planes) {
571 if (f->avctx->bits_per_raw_sample <= 8)
572 f->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
573 else if (f->avctx->bits_per_raw_sample == 10) {
574 f->packed_at_lsb = 1;
575 f->avctx->pix_fmt = AV_PIX_FMT_GRAY10;
576 } else if (f->avctx->bits_per_raw_sample == 12) {
577 f->packed_at_lsb = 1;
578 f->avctx->pix_fmt = AV_PIX_FMT_GRAY12;
579 } else if (f->avctx->bits_per_raw_sample == 16) {
580 f->packed_at_lsb = 1;
581 f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
582 } else if (f->avctx->bits_per_raw_sample < 16) {
583 f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
584 } else
585 return AVERROR(ENOSYS);
586 } else if (f->transparency && !f->chroma_planes) {
587 if (f->avctx->bits_per_raw_sample <= 8)
588 f->avctx->pix_fmt = AV_PIX_FMT_YA8;
589 else
590 return AVERROR(ENOSYS);
591 } else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {
592 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
593 case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P; break;
594 case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P; break;
595 case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P; break;
596 case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P; break;
597 case 0x20: f->avctx->pix_fmt = AV_PIX_FMT_YUV411P; break;
598 case 0x22: f->avctx->pix_fmt = AV_PIX_FMT_YUV410P; break;
599 }
600 } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {
601 switch(16*f->chroma_h_shift + f->chroma_v_shift) {
602 case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P; break;
603 case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;
604 case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;
605 }
606 } else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {
607 f->packed_at_lsb = 1;
608 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
609 case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9; break;
610 case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9; break;
611 case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9; break;
612 }
613 } else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {
614 f->packed_at_lsb = 1;
615 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
616 case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P9; break;
617 case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P9; break;
618 case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P9; break;
619 }
620 } else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {
621 f->packed_at_lsb = 1;
622 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
623 case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10; break;
624 case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;
625 case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;
626 }
627 } else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {
628 f->packed_at_lsb = 1;
629 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
630 case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P10; break;
631 case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P10; break;
632 case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;
633 }
634 } else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency) {
635 f->packed_at_lsb = 1;
636 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
637 case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P12; break;
638 case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P12; break;
639 case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P12; break;
640 }
641 } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){
642 f->packed_at_lsb = 1;
643 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
644 case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;
645 case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;
646 case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;
647 }
648 } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){
649 f->packed_at_lsb = 1;
650 switch(16 * f->chroma_h_shift + f->chroma_v_shift) {
651 case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;
652 case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;
653 case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16; break;
654 }
655 }
656 } else if (f->colorspace == 1) {
657 if (f->chroma_h_shift || f->chroma_v_shift) {
658 av_log(f->avctx, AV_LOG_ERROR,
659 "chroma subsampling not supported in this colorspace\n");
660 return AVERROR(ENOSYS);
661 }
662 if ( f->avctx->bits_per_raw_sample <= 8 && !f->transparency)
663 f->avctx->pix_fmt = AV_PIX_FMT_0RGB32;
664 else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency)
665 f->avctx->pix_fmt = AV_PIX_FMT_RGB32;
666 else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency)
667 f->avctx->pix_fmt = AV_PIX_FMT_GBRP9;
668 else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency)
669 f->avctx->pix_fmt = AV_PIX_FMT_GBRP10;
670 else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency)
671 f->avctx->pix_fmt = AV_PIX_FMT_GBRP12;
672 else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency)
673 f->avctx->pix_fmt = AV_PIX_FMT_GBRP14;
674 else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency) {
675 f->avctx->pix_fmt = AV_PIX_FMT_GBRP16;
676 f->use32bit = 1;
677 }
678 } else {
679 av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
680 return AVERROR(ENOSYS);
681 }
682 if (f->avctx->pix_fmt == AV_PIX_FMT_NONE) {
683 av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
684 return AVERROR(ENOSYS);
685 }
686
687 ff_dlog(f->avctx, "%d %d %d\n",
688 f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);
689 if (f->version < 2) {
690 context_count = read_quant_tables(c, f->quant_table);
691 if (context_count < 0) {
692 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
693 return AVERROR_INVALIDDATA;
694 }
695 f->slice_count = f->max_slice_count;
696 } else if (f->version < 3) {
697 f->slice_count = get_symbol(c, state, 0);
698 } else {
699 const uint8_t *p = c->bytestream_end;
700 for (f->slice_count = 0;
701 f->slice_count < MAX_SLICES && 3 < p - c->bytestream_start;
702 f->slice_count++) {
703 int trailer = 3 + 5*!!f->ec;
704 int size = AV_RB24(p-trailer);
705 if (size + trailer > p - c->bytestream_start)
706 break;
707 p -= size + trailer;
708 }
709 }
710 if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0 || f->slice_count > f->max_slice_count) {
711 av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid (max=%d)\n", f->slice_count, f->max_slice_count);
712 return AVERROR_INVALIDDATA;
713 }
714
715 for (j = 0; j < f->slice_count; j++) {
716 FFV1Context *fs = f->slice_context[j];
717 fs->ac = f->ac;
718 fs->packed_at_lsb = f->packed_at_lsb;
719
720 fs->slice_damaged = 0;
721
722 if (f->version == 2) {
723 fs->slice_x = get_symbol(c, state, 0) * f->width ;
724 fs->slice_y = get_symbol(c, state, 0) * f->height;
725 fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
726 fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
727
728 fs->slice_x /= f->num_h_slices;
729 fs->slice_y /= f->num_v_slices;
730 fs->slice_width = fs->slice_width / f->num_h_slices - fs->slice_x;
731 fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
732 if ((unsigned)fs->slice_width > f->width ||
733 (unsigned)fs->slice_height > f->height)
734 return AVERROR_INVALIDDATA;
735 if ( (unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width
736 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
737 return AVERROR_INVALIDDATA;
738 }
739
740 for (i = 0; i < f->plane_count; i++) {
741 PlaneContext *const p = &fs->plane[i];
742
743 if (f->version == 2) {
744 int idx = get_symbol(c, state, 0);
745 if (idx > (unsigned)f->quant_table_count) {
746 av_log(f->avctx, AV_LOG_ERROR,
747 "quant_table_index out of range\n");
748 return AVERROR_INVALIDDATA;
749 }
750 p->quant_table_index = idx;
751 memcpy(p->quant_table, f->quant_tables[idx],
752 sizeof(p->quant_table));
753 context_count = f->context_count[idx];
754 } else {
755 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
756 }
757
758 if (f->version <= 2) {
759 av_assert0(context_count >= 0);
760 if (p->context_count < context_count) {
761 av_freep(&p->state);
762 av_freep(&p->vlc_state);
763 }
764 p->context_count = context_count;
765 }
766 }
767 }
768 return 0;
769}
770
771static av_cold int decode_init(AVCodecContext *avctx)
772{
773 FFV1Context *f = avctx->priv_data;
774 int ret;
775
776 if ((ret = ff_ffv1_common_init(avctx)) < 0)
777 return ret;
778
779 if (avctx->extradata_size > 0 && (ret = read_extra_header(f)) < 0)
780 return ret;
781
782 if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
783 return ret;
784
785 avctx->internal->allocate_progress = 1;
786
787 return 0;
788}
789
790static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
791{
792 uint8_t *buf = avpkt->data;
793 int buf_size = avpkt->size;
794 FFV1Context *f = avctx->priv_data;
795 RangeCoder *const c = &f->slice_context[0]->c;
796 int i, ret;
797 uint8_t keystate = 128;
798 uint8_t *buf_p;
799 AVFrame *p;
800
801 if (f->last_picture.f)
802 ff_thread_release_buffer(avctx, &f->last_picture);
803 FFSWAP(ThreadFrame, f->picture, f->last_picture);
804
805 f->cur = p = f->picture.f;
806
807 if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {
808 /* we have interlaced material flagged in container */
809 p->interlaced_frame = 1;
810 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
811 p->top_field_first = 1;
812 }
813
814 f->avctx = avctx;
815 ff_init_range_decoder(c, buf, buf_size);
816 ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
817
818 p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P
819 if (get_rac(c, &keystate)) {
820 p->key_frame = 1;
821 f->key_frame_ok = 0;
822 if ((ret = read_header(f)) < 0)
823 return ret;
824 f->key_frame_ok = 1;
825 } else {
826 if (!f->key_frame_ok) {
827 av_log(avctx, AV_LOG_ERROR,
828 "Cannot decode non-keyframe without valid keyframe\n");
829 return AVERROR_INVALIDDATA;
830 }
831 p->key_frame = 0;
832 }
833
834 if ((ret = ff_thread_get_buffer(avctx, &f->picture, AV_GET_BUFFER_FLAG_REF)) < 0)
835 return ret;
836
837 if (avctx->debug & FF_DEBUG_PICT_INFO)
838 av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
839 f->version, p->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);
840
841 ff_thread_finish_setup(avctx);
842
843 buf_p = buf + buf_size;
844 for (i = f->slice_count - 1; i >= 0; i--) {
845 FFV1Context *fs = f->slice_context[i];
846 int trailer = 3 + 5*!!f->ec;
847 int v;
848
849 if (i || f->version > 2) v = AV_RB24(buf_p-trailer) + trailer;
850 else v = buf_p - c->bytestream_start;
851 if (buf_p - c->bytestream_start < v) {
852 av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
853 ff_thread_report_progress(&f->picture, INT_MAX, 0);
854 return AVERROR_INVALIDDATA;
855 }
856 buf_p -= v;
857
858 if (f->ec) {
859 unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);
860 if (crc) {
861 int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;
862 av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!", crc);
863 if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {
864 av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));
865 } else if (ts != AV_NOPTS_VALUE) {
866 av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);
867 } else {
868 av_log(f->avctx, AV_LOG_ERROR, "\n");
869 }
870 fs->slice_damaged = 1;
871 }
872 if (avctx->debug & FF_DEBUG_PICT_INFO) {
873 av_log(avctx, AV_LOG_DEBUG, "slice %d, CRC: 0x%08"PRIX32"\n", i, AV_RB32(buf_p + v - 4));
874 }
875 }
876
877 if (i) {
878 ff_init_range_decoder(&fs->c, buf_p, v);
879 } else
880 fs->c.bytestream_end = buf_p + v;
881
882 fs->avctx = avctx;
883 fs->cur = p;
884 }
885
886 avctx->execute(avctx,
887 decode_slice,
888 &f->slice_context[0],
889 NULL,
890 f->slice_count,
891 sizeof(void*));
892
893 for (i = f->slice_count - 1; i >= 0; i--) {
894 FFV1Context *fs = f->slice_context[i];
895 int j;
896 if (fs->slice_damaged && f->last_picture.f->data[0]) {
897 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
898 const uint8_t *src[4];
899 uint8_t *dst[4];
900 ff_thread_await_progress(&f->last_picture, INT_MAX, 0);
901 for (j = 0; j < 4; j++) {
902 int pixshift = desc->comp[j].depth > 8;
903 int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
904 int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
905 dst[j] = p->data[j] + p->linesize[j] *
906 (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
907 src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *
908 (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);
909 }
910 av_image_copy(dst, p->linesize, src,
911 f->last_picture.f->linesize,
912 avctx->pix_fmt,
913 fs->slice_width,
914 fs->slice_height);
915 }
916 }
917 ff_thread_report_progress(&f->picture, INT_MAX, 0);
918
919 f->picture_number++;
920
921 if (f->last_picture.f)
922 ff_thread_release_buffer(avctx, &f->last_picture);
923 f->cur = NULL;
924 if ((ret = av_frame_ref(data, f->picture.f)) < 0)
925 return ret;
926
927 *got_frame = 1;
928
929 return buf_size;
930}
931
932#if HAVE_THREADS
933static int init_thread_copy(AVCodecContext *avctx)
934{
935 FFV1Context *f = avctx->priv_data;
936 int i, ret;
937
938 f->picture.f = NULL;
939 f->last_picture.f = NULL;
940 f->sample_buffer = NULL;
941 f->max_slice_count = 0;
942 f->slice_count = 0;
943
944 for (i = 0; i < f->quant_table_count; i++) {
945 av_assert0(f->version > 1);
946 f->initial_states[i] = av_memdup(f->initial_states[i],
947 f->context_count[i] * sizeof(*f->initial_states[i]));
948 }
949
950 f->picture.f = av_frame_alloc();
951 f->last_picture.f = av_frame_alloc();
952
953 if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)
954 return ret;
955
956 return 0;
957}
958#endif
959
960static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
961{
962 fsdst->version = fsrc->version;
963 fsdst->micro_version = fsrc->micro_version;
964 fsdst->chroma_planes = fsrc->chroma_planes;
965 fsdst->chroma_h_shift = fsrc->chroma_h_shift;
966 fsdst->chroma_v_shift = fsrc->chroma_v_shift;
967 fsdst->transparency = fsrc->transparency;
968 fsdst->plane_count = fsrc->plane_count;
969 fsdst->ac = fsrc->ac;
970 fsdst->colorspace = fsrc->colorspace;
971
972 fsdst->ec = fsrc->ec;
973 fsdst->intra = fsrc->intra;
974 fsdst->slice_damaged = fssrc->slice_damaged;
975 fsdst->key_frame_ok = fsrc->key_frame_ok;
976
977 fsdst->bits_per_raw_sample = fsrc->bits_per_raw_sample;
978 fsdst->packed_at_lsb = fsrc->packed_at_lsb;
979 fsdst->slice_count = fsrc->slice_count;
980 if (fsrc->version<3){
981 fsdst->slice_x = fssrc->slice_x;
982 fsdst->slice_y = fssrc->slice_y;
983 fsdst->slice_width = fssrc->slice_width;
984 fsdst->slice_height = fssrc->slice_height;
985 }
986}
987
988#if HAVE_THREADS
989static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
990{
991 FFV1Context *fsrc = src->priv_data;
992 FFV1Context *fdst = dst->priv_data;
993 int i, ret;
994
995 if (dst == src)
996 return 0;
997
998 {
999 ThreadFrame picture = fdst->picture, last_picture = fdst->last_picture;
1000 uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
1001 struct FFV1Context *slice_context[MAX_SLICES];
1002 memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));
1003 memcpy(slice_context, fdst->slice_context , sizeof(fdst->slice_context));
1004
1005 memcpy(fdst, fsrc, sizeof(*fdst));
1006 memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));
1007 memcpy(fdst->slice_context, slice_context , sizeof(fdst->slice_context));
1008 fdst->picture = picture;
1009 fdst->last_picture = last_picture;
1010 for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {
1011 FFV1Context *fssrc = fsrc->slice_context[i];
1012 FFV1Context *fsdst = fdst->slice_context[i];
1013 copy_fields(fsdst, fssrc, fsrc);
1014 }
1015 av_assert0(!fdst->plane[0].state);
1016 av_assert0(!fdst->sample_buffer);
1017 }
1018
1019 av_assert1(fdst->max_slice_count == fsrc->max_slice_count);
1020
1021
1022 ff_thread_release_buffer(dst, &fdst->picture);
1023 if (fsrc->picture.f->data[0]) {
1024 if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)
1025 return ret;
1026 }
1027
1028 fdst->fsrc = fsrc;
1029
1030 return 0;
1031}
1032#endif
1033
1034AVCodec ff_ffv1_decoder = {
1035 .name = "ffv1",
1036 .long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
1037 .type = AVMEDIA_TYPE_VIDEO,
1038 .id = AV_CODEC_ID_FFV1,
1039 .priv_data_size = sizeof(FFV1Context),
1040 .init = decode_init,
1041 .close = ff_ffv1_close,
1042 .decode = decode_frame,
1043 .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
1044 .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
1045 .capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |
1046 AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS,
1047 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP
1048};
1049
generated by cgit at 2024-05-17 03:40:29 (GMT)