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h264: check that an IDR NAL only contains I slices
[libav.git] / libavcodec / h264.c
1 /*
2 * H.26L/H.264/AVC/JVT/14496-10/... decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * H.264 / AVC / MPEG4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/stereo3d.h"
31 #include "internal.h"
32 #include "cabac.h"
33 #include "cabac_functions.h"
34 #include "dsputil.h"
35 #include "error_resilience.h"
36 #include "avcodec.h"
37 #include "mpegvideo.h"
38 #include "h264.h"
39 #include "h264data.h"
40 #include "h264chroma.h"
41 #include "h264_mvpred.h"
42 #include "golomb.h"
43 #include "mathops.h"
44 #include "rectangle.h"
45 #include "svq3.h"
46 #include "thread.h"
47
48 #include <assert.h>
49
50 const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
51
52 static const uint8_t rem6[QP_MAX_NUM + 1] = {
53 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2,
54 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
55 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
56 };
57
58 static const uint8_t div6[QP_MAX_NUM + 1] = {
59 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3,
60 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
61 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10,
62 };
63
64 static const uint8_t field_scan[16] = {
65 0 + 0 * 4, 0 + 1 * 4, 1 + 0 * 4, 0 + 2 * 4,
66 0 + 3 * 4, 1 + 1 * 4, 1 + 2 * 4, 1 + 3 * 4,
67 2 + 0 * 4, 2 + 1 * 4, 2 + 2 * 4, 2 + 3 * 4,
68 3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4, 3 + 3 * 4,
69 };
70
71 static const uint8_t field_scan8x8[64] = {
72 0 + 0 * 8, 0 + 1 * 8, 0 + 2 * 8, 1 + 0 * 8,
73 1 + 1 * 8, 0 + 3 * 8, 0 + 4 * 8, 1 + 2 * 8,
74 2 + 0 * 8, 1 + 3 * 8, 0 + 5 * 8, 0 + 6 * 8,
75 0 + 7 * 8, 1 + 4 * 8, 2 + 1 * 8, 3 + 0 * 8,
76 2 + 2 * 8, 1 + 5 * 8, 1 + 6 * 8, 1 + 7 * 8,
77 2 + 3 * 8, 3 + 1 * 8, 4 + 0 * 8, 3 + 2 * 8,
78 2 + 4 * 8, 2 + 5 * 8, 2 + 6 * 8, 2 + 7 * 8,
79 3 + 3 * 8, 4 + 1 * 8, 5 + 0 * 8, 4 + 2 * 8,
80 3 + 4 * 8, 3 + 5 * 8, 3 + 6 * 8, 3 + 7 * 8,
81 4 + 3 * 8, 5 + 1 * 8, 6 + 0 * 8, 5 + 2 * 8,
82 4 + 4 * 8, 4 + 5 * 8, 4 + 6 * 8, 4 + 7 * 8,
83 5 + 3 * 8, 6 + 1 * 8, 6 + 2 * 8, 5 + 4 * 8,
84 5 + 5 * 8, 5 + 6 * 8, 5 + 7 * 8, 6 + 3 * 8,
85 7 + 0 * 8, 7 + 1 * 8, 6 + 4 * 8, 6 + 5 * 8,
86 6 + 6 * 8, 6 + 7 * 8, 7 + 2 * 8, 7 + 3 * 8,
87 7 + 4 * 8, 7 + 5 * 8, 7 + 6 * 8, 7 + 7 * 8,
88 };
89
90 static const uint8_t field_scan8x8_cavlc[64] = {
91 0 + 0 * 8, 1 + 1 * 8, 2 + 0 * 8, 0 + 7 * 8,
92 2 + 2 * 8, 2 + 3 * 8, 2 + 4 * 8, 3 + 3 * 8,
93 3 + 4 * 8, 4 + 3 * 8, 4 + 4 * 8, 5 + 3 * 8,
94 5 + 5 * 8, 7 + 0 * 8, 6 + 6 * 8, 7 + 4 * 8,
95 0 + 1 * 8, 0 + 3 * 8, 1 + 3 * 8, 1 + 4 * 8,
96 1 + 5 * 8, 3 + 1 * 8, 2 + 5 * 8, 4 + 1 * 8,
97 3 + 5 * 8, 5 + 1 * 8, 4 + 5 * 8, 6 + 1 * 8,
98 5 + 6 * 8, 7 + 1 * 8, 6 + 7 * 8, 7 + 5 * 8,
99 0 + 2 * 8, 0 + 4 * 8, 0 + 5 * 8, 2 + 1 * 8,
100 1 + 6 * 8, 4 + 0 * 8, 2 + 6 * 8, 5 + 0 * 8,
101 3 + 6 * 8, 6 + 0 * 8, 4 + 6 * 8, 6 + 2 * 8,
102 5 + 7 * 8, 6 + 4 * 8, 7 + 2 * 8, 7 + 6 * 8,
103 1 + 0 * 8, 1 + 2 * 8, 0 + 6 * 8, 3 + 0 * 8,
104 1 + 7 * 8, 3 + 2 * 8, 2 + 7 * 8, 4 + 2 * 8,
105 3 + 7 * 8, 5 + 2 * 8, 4 + 7 * 8, 5 + 4 * 8,
106 6 + 3 * 8, 6 + 5 * 8, 7 + 3 * 8, 7 + 7 * 8,
107 };
108
109 // zigzag_scan8x8_cavlc[i] = zigzag_scan8x8[(i/4) + 16*(i%4)]
110 static const uint8_t zigzag_scan8x8_cavlc[64] = {
111 0 + 0 * 8, 1 + 1 * 8, 1 + 2 * 8, 2 + 2 * 8,
112 4 + 1 * 8, 0 + 5 * 8, 3 + 3 * 8, 7 + 0 * 8,
113 3 + 4 * 8, 1 + 7 * 8, 5 + 3 * 8, 6 + 3 * 8,
114 2 + 7 * 8, 6 + 4 * 8, 5 + 6 * 8, 7 + 5 * 8,
115 1 + 0 * 8, 2 + 0 * 8, 0 + 3 * 8, 3 + 1 * 8,
116 3 + 2 * 8, 0 + 6 * 8, 4 + 2 * 8, 6 + 1 * 8,
117 2 + 5 * 8, 2 + 6 * 8, 6 + 2 * 8, 5 + 4 * 8,
118 3 + 7 * 8, 7 + 3 * 8, 4 + 7 * 8, 7 + 6 * 8,
119 0 + 1 * 8, 3 + 0 * 8, 0 + 4 * 8, 4 + 0 * 8,
120 2 + 3 * 8, 1 + 5 * 8, 5 + 1 * 8, 5 + 2 * 8,
121 1 + 6 * 8, 3 + 5 * 8, 7 + 1 * 8, 4 + 5 * 8,
122 4 + 6 * 8, 7 + 4 * 8, 5 + 7 * 8, 6 + 7 * 8,
123 0 + 2 * 8, 2 + 1 * 8, 1 + 3 * 8, 5 + 0 * 8,
124 1 + 4 * 8, 2 + 4 * 8, 6 + 0 * 8, 4 + 3 * 8,
125 0 + 7 * 8, 4 + 4 * 8, 7 + 2 * 8, 3 + 6 * 8,
126 5 + 5 * 8, 6 + 5 * 8, 6 + 6 * 8, 7 + 7 * 8,
127 };
128
129 static const uint8_t dequant4_coeff_init[6][3] = {
130 { 10, 13, 16 },
131 { 11, 14, 18 },
132 { 13, 16, 20 },
133 { 14, 18, 23 },
134 { 16, 20, 25 },
135 { 18, 23, 29 },
136 };
137
138 static const uint8_t dequant8_coeff_init_scan[16] = {
139 0, 3, 4, 3, 3, 1, 5, 1, 4, 5, 2, 5, 3, 1, 5, 1
140 };
141
142 static const uint8_t dequant8_coeff_init[6][6] = {
143 { 20, 18, 32, 19, 25, 24 },
144 { 22, 19, 35, 21, 28, 26 },
145 { 26, 23, 42, 24, 33, 31 },
146 { 28, 25, 45, 26, 35, 33 },
147 { 32, 28, 51, 30, 40, 38 },
148 { 36, 32, 58, 34, 46, 43 },
149 };
150
151 static const enum AVPixelFormat h264_hwaccel_pixfmt_list_420[] = {
152 #if CONFIG_H264_DXVA2_HWACCEL
153 AV_PIX_FMT_DXVA2_VLD,
154 #endif
155 #if CONFIG_H264_VAAPI_HWACCEL
156 AV_PIX_FMT_VAAPI_VLD,
157 #endif
158 #if CONFIG_H264_VDA_HWACCEL
159 AV_PIX_FMT_VDA_VLD,
160 #endif
161 #if CONFIG_H264_VDPAU_HWACCEL
162 AV_PIX_FMT_VDPAU,
163 #endif
164 AV_PIX_FMT_YUV420P,
165 AV_PIX_FMT_NONE
166 };
167
168 static const enum AVPixelFormat h264_hwaccel_pixfmt_list_jpeg_420[] = {
169 #if CONFIG_H264_DXVA2_HWACCEL
170 AV_PIX_FMT_DXVA2_VLD,
171 #endif
172 #if CONFIG_H264_VAAPI_HWACCEL
173 AV_PIX_FMT_VAAPI_VLD,
174 #endif
175 #if CONFIG_H264_VDA_HWACCEL
176 AV_PIX_FMT_VDA_VLD,
177 #endif
178 #if CONFIG_H264_VDPAU_HWACCEL
179 AV_PIX_FMT_VDPAU,
180 #endif
181 AV_PIX_FMT_YUVJ420P,
182 AV_PIX_FMT_NONE
183 };
184
185 static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
186 int (*mv)[2][4][2],
187 int mb_x, int mb_y, int mb_intra, int mb_skipped)
188 {
189 H264Context *h = opaque;
190
191 h->mb_x = mb_x;
192 h->mb_y = mb_y;
193 h->mb_xy = mb_x + mb_y * h->mb_stride;
194 memset(h->non_zero_count_cache, 0, sizeof(h->non_zero_count_cache));
195 assert(ref >= 0);
196 /* FIXME: It is possible albeit uncommon that slice references
197 * differ between slices. We take the easy approach and ignore
198 * it for now. If this turns out to have any relevance in
199 * practice then correct remapping should be added. */
200 if (ref >= h->ref_count[0])
201 ref = 0;
202 fill_rectangle(&h->cur_pic.ref_index[0][4 * h->mb_xy],
203 2, 2, 2, ref, 1);
204 fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
205 fill_rectangle(h->mv_cache[0][scan8[0]], 4, 4, 8,
206 pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
207 assert(!FRAME_MBAFF(h));
208 ff_h264_hl_decode_mb(h);
209 }
210
211 void ff_h264_draw_horiz_band(H264Context *h, int y, int height)
212 {
213 AVCodecContext *avctx = h->avctx;
214 Picture *cur = &h->cur_pic;
215 Picture *last = h->ref_list[0][0].f.data[0] ? &h->ref_list[0][0] : NULL;
216 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
217 int vshift = desc->log2_chroma_h;
218 const int field_pic = h->picture_structure != PICT_FRAME;
219 if (field_pic) {
220 height <<= 1;
221 y <<= 1;
222 }
223
224 height = FFMIN(height, avctx->height - y);
225
226 if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
227 return;
228
229 if (avctx->draw_horiz_band) {
230 AVFrame *src;
231 int offset[AV_NUM_DATA_POINTERS];
232 int i;
233
234 if (cur->f.pict_type == AV_PICTURE_TYPE_B || h->low_delay ||
235 (avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
236 src = &cur->f;
237 else if (last)
238 src = &last->f;
239 else
240 return;
241
242 offset[0] = y * src->linesize[0];
243 offset[1] =
244 offset[2] = (y >> vshift) * src->linesize[1];
245 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
246 offset[i] = 0;
247
248 emms_c();
249
250 avctx->draw_horiz_band(avctx, src, offset,
251 y, h->picture_structure, height);
252 }
253 }
254
255 static void unref_picture(H264Context *h, Picture *pic)
256 {
257 int off = offsetof(Picture, tf) + sizeof(pic->tf);
258 int i;
259
260 if (!pic->f.buf[0])
261 return;
262
263 ff_thread_release_buffer(h->avctx, &pic->tf);
264 av_buffer_unref(&pic->hwaccel_priv_buf);
265
266 av_buffer_unref(&pic->qscale_table_buf);
267 av_buffer_unref(&pic->mb_type_buf);
268 for (i = 0; i < 2; i++) {
269 av_buffer_unref(&pic->motion_val_buf[i]);
270 av_buffer_unref(&pic->ref_index_buf[i]);
271 }
272
273 memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
274 }
275
276 static void release_unused_pictures(H264Context *h, int remove_current)
277 {
278 int i;
279
280 /* release non reference frames */
281 for (i = 0; i < MAX_PICTURE_COUNT; i++) {
282 if (h->DPB[i].f.buf[0] && !h->DPB[i].reference &&
283 (remove_current || &h->DPB[i] != h->cur_pic_ptr)) {
284 unref_picture(h, &h->DPB[i]);
285 }
286 }
287 }
288
289 static int ref_picture(H264Context *h, Picture *dst, Picture *src)
290 {
291 int ret, i;
292
293 av_assert0(!dst->f.buf[0]);
294 av_assert0(src->f.buf[0]);
295
296 src->tf.f = &src->f;
297 dst->tf.f = &dst->f;
298 ret = ff_thread_ref_frame(&dst->tf, &src->tf);
299 if (ret < 0)
300 goto fail;
301
302 dst->qscale_table_buf = av_buffer_ref(src->qscale_table_buf);
303 dst->mb_type_buf = av_buffer_ref(src->mb_type_buf);
304 if (!dst->qscale_table_buf || !dst->mb_type_buf)
305 goto fail;
306 dst->qscale_table = src->qscale_table;
307 dst->mb_type = src->mb_type;
308
309 for (i = 0; i < 2; i++) {
310 dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
311 dst->ref_index_buf[i] = av_buffer_ref(src->ref_index_buf[i]);
312 if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i])
313 goto fail;
314 dst->motion_val[i] = src->motion_val[i];
315 dst->ref_index[i] = src->ref_index[i];
316 }
317
318 if (src->hwaccel_picture_private) {
319 dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
320 if (!dst->hwaccel_priv_buf)
321 goto fail;
322 dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
323 }
324
325 for (i = 0; i < 2; i++)
326 dst->field_poc[i] = src->field_poc[i];
327
328 memcpy(dst->ref_poc, src->ref_poc, sizeof(src->ref_poc));
329 memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
330
331 dst->poc = src->poc;
332 dst->frame_num = src->frame_num;
333 dst->mmco_reset = src->mmco_reset;
334 dst->pic_id = src->pic_id;
335 dst->long_ref = src->long_ref;
336 dst->mbaff = src->mbaff;
337 dst->field_picture = src->field_picture;
338 dst->needs_realloc = src->needs_realloc;
339 dst->reference = src->reference;
340 dst->recovered = src->recovered;
341
342 return 0;
343 fail:
344 unref_picture(h, dst);
345 return ret;
346 }
347
348 static int alloc_scratch_buffers(H264Context *h, int linesize)
349 {
350 int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
351
352 if (h->bipred_scratchpad)
353 return 0;
354
355 h->bipred_scratchpad = av_malloc(16 * 6 * alloc_size);
356 // edge emu needs blocksize + filter length - 1
357 // (= 21x21 for h264)
358 h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 21);
359 h->me.scratchpad = av_mallocz(alloc_size * 2 * 16 * 2);
360
361 if (!h->bipred_scratchpad || !h->edge_emu_buffer || !h->me.scratchpad) {
362 av_freep(&h->bipred_scratchpad);
363 av_freep(&h->edge_emu_buffer);
364 av_freep(&h->me.scratchpad);
365 return AVERROR(ENOMEM);
366 }
367
368 h->me.temp = h->me.scratchpad;
369
370 return 0;
371 }
372
373 static int init_table_pools(H264Context *h)
374 {
375 const int big_mb_num = h->mb_stride * (h->mb_height + 1) + 1;
376 const int mb_array_size = h->mb_stride * h->mb_height;
377 const int b4_stride = h->mb_width * 4 + 1;
378 const int b4_array_size = b4_stride * h->mb_height * 4;
379
380 h->qscale_table_pool = av_buffer_pool_init(big_mb_num + h->mb_stride,
381 av_buffer_allocz);
382 h->mb_type_pool = av_buffer_pool_init((big_mb_num + h->mb_stride) *
383 sizeof(uint32_t), av_buffer_allocz);
384 h->motion_val_pool = av_buffer_pool_init(2 * (b4_array_size + 4) *
385 sizeof(int16_t), av_buffer_allocz);
386 h->ref_index_pool = av_buffer_pool_init(4 * mb_array_size, av_buffer_allocz);
387
388 if (!h->qscale_table_pool || !h->mb_type_pool || !h->motion_val_pool ||
389 !h->ref_index_pool) {
390 av_buffer_pool_uninit(&h->qscale_table_pool);
391 av_buffer_pool_uninit(&h->mb_type_pool);
392 av_buffer_pool_uninit(&h->motion_val_pool);
393 av_buffer_pool_uninit(&h->ref_index_pool);
394 return AVERROR(ENOMEM);
395 }
396
397 return 0;
398 }
399
400 static int alloc_picture(H264Context *h, Picture *pic)
401 {
402 int i, ret = 0;
403
404 av_assert0(!pic->f.data[0]);
405
406 pic->tf.f = &pic->f;
407 ret = ff_thread_get_buffer(h->avctx, &pic->tf, pic->reference ?
408 AV_GET_BUFFER_FLAG_REF : 0);
409 if (ret < 0)
410 goto fail;
411
412 h->linesize = pic->f.linesize[0];
413 h->uvlinesize = pic->f.linesize[1];
414
415 if (h->avctx->hwaccel) {
416 const AVHWAccel *hwaccel = h->avctx->hwaccel;
417 av_assert0(!pic->hwaccel_picture_private);
418 if (hwaccel->priv_data_size) {
419 pic->hwaccel_priv_buf = av_buffer_allocz(hwaccel->priv_data_size);
420 if (!pic->hwaccel_priv_buf)
421 return AVERROR(ENOMEM);
422 pic->hwaccel_picture_private = pic->hwaccel_priv_buf->data;
423 }
424 }
425
426 if (!h->qscale_table_pool) {
427 ret = init_table_pools(h);
428 if (ret < 0)
429 goto fail;
430 }
431
432 pic->qscale_table_buf = av_buffer_pool_get(h->qscale_table_pool);
433 pic->mb_type_buf = av_buffer_pool_get(h->mb_type_pool);
434 if (!pic->qscale_table_buf || !pic->mb_type_buf)
435 goto fail;
436
437 pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * h->mb_stride + 1;
438 pic->qscale_table = pic->qscale_table_buf->data + 2 * h->mb_stride + 1;
439
440 for (i = 0; i < 2; i++) {
441 pic->motion_val_buf[i] = av_buffer_pool_get(h->motion_val_pool);
442 pic->ref_index_buf[i] = av_buffer_pool_get(h->ref_index_pool);
443 if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
444 goto fail;
445
446 pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
447 pic->ref_index[i] = pic->ref_index_buf[i]->data;
448 }
449
450 return 0;
451 fail:
452 unref_picture(h, pic);
453 return (ret < 0) ? ret : AVERROR(ENOMEM);
454 }
455
456 static inline int pic_is_unused(H264Context *h, Picture *pic)
457 {
458 if (!pic->f.buf[0])
459 return 1;
460 if (pic->needs_realloc && !(pic->reference & DELAYED_PIC_REF))
461 return 1;
462 return 0;
463 }
464
465 static int find_unused_picture(H264Context *h)
466 {
467 int i;
468
469 for (i = 0; i < MAX_PICTURE_COUNT; i++) {
470 if (pic_is_unused(h, &h->DPB[i]))
471 break;
472 }
473 if (i == MAX_PICTURE_COUNT)
474 return AVERROR_INVALIDDATA;
475
476 if (h->DPB[i].needs_realloc) {
477 h->DPB[i].needs_realloc = 0;
478 unref_picture(h, &h->DPB[i]);
479 }
480
481 return i;
482 }
483
484 /**
485 * Check if the top & left blocks are available if needed and
486 * change the dc mode so it only uses the available blocks.
487 */
488 int ff_h264_check_intra4x4_pred_mode(H264Context *h)
489 {
490 static const int8_t top[12] = {
491 -1, 0, LEFT_DC_PRED, -1, -1, -1, -1, -1, 0
492 };
493 static const int8_t left[12] = {
494 0, -1, TOP_DC_PRED, 0, -1, -1, -1, 0, -1, DC_128_PRED
495 };
496 int i;
497
498 if (!(h->top_samples_available & 0x8000)) {
499 for (i = 0; i < 4; i++) {
500 int status = top[h->intra4x4_pred_mode_cache[scan8[0] + i]];
501 if (status < 0) {
502 av_log(h->avctx, AV_LOG_ERROR,
503 "top block unavailable for requested intra4x4 mode %d at %d %d\n",
504 status, h->mb_x, h->mb_y);
505 return AVERROR_INVALIDDATA;
506 } else if (status) {
507 h->intra4x4_pred_mode_cache[scan8[0] + i] = status;
508 }
509 }
510 }
511
512 if ((h->left_samples_available & 0x8888) != 0x8888) {
513 static const int mask[4] = { 0x8000, 0x2000, 0x80, 0x20 };
514 for (i = 0; i < 4; i++)
515 if (!(h->left_samples_available & mask[i])) {
516 int status = left[h->intra4x4_pred_mode_cache[scan8[0] + 8 * i]];
517 if (status < 0) {
518 av_log(h->avctx, AV_LOG_ERROR,
519 "left block unavailable for requested intra4x4 mode %d at %d %d\n",
520 status, h->mb_x, h->mb_y);
521 return AVERROR_INVALIDDATA;
522 } else if (status) {
523 h->intra4x4_pred_mode_cache[scan8[0] + 8 * i] = status;
524 }
525 }
526 }
527
528 return 0;
529 } // FIXME cleanup like ff_h264_check_intra_pred_mode
530
531 /**
532 * Check if the top & left blocks are available if needed and
533 * change the dc mode so it only uses the available blocks.
534 */
535 int ff_h264_check_intra_pred_mode(H264Context *h, int mode, int is_chroma)
536 {
537 static const int8_t top[4] = { LEFT_DC_PRED8x8, 1, -1, -1 };
538 static const int8_t left[5] = { TOP_DC_PRED8x8, -1, 2, -1, DC_128_PRED8x8 };
539
540 if (mode > 3U) {
541 av_log(h->avctx, AV_LOG_ERROR,
542 "out of range intra chroma pred mode at %d %d\n",
543 h->mb_x, h->mb_y);
544 return AVERROR_INVALIDDATA;
545 }
546
547 if (!(h->top_samples_available & 0x8000)) {
548 mode = top[mode];
549 if (mode < 0) {
550 av_log(h->avctx, AV_LOG_ERROR,
551 "top block unavailable for requested intra mode at %d %d\n",
552 h->mb_x, h->mb_y);
553 return AVERROR_INVALIDDATA;
554 }
555 }
556
557 if ((h->left_samples_available & 0x8080) != 0x8080) {
558 mode = left[mode];
559 if (is_chroma && (h->left_samples_available & 0x8080)) {
560 // mad cow disease mode, aka MBAFF + constrained_intra_pred
561 mode = ALZHEIMER_DC_L0T_PRED8x8 +
562 (!(h->left_samples_available & 0x8000)) +
563 2 * (mode == DC_128_PRED8x8);
564 }
565 if (mode < 0) {
566 av_log(h->avctx, AV_LOG_ERROR,
567 "left block unavailable for requested intra mode at %d %d\n",
568 h->mb_x, h->mb_y);
569 return AVERROR_INVALIDDATA;
570 }
571 }
572
573 return mode;
574 }
575
576 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src,
577 int *dst_length, int *consumed, int length)
578 {
579 int i, si, di;
580 uint8_t *dst;
581 int bufidx;
582
583 // src[0]&0x80; // forbidden bit
584 h->nal_ref_idc = src[0] >> 5;
585 h->nal_unit_type = src[0] & 0x1F;
586
587 src++;
588 length--;
589
590 #define STARTCODE_TEST \
591 if (i + 2 < length && src[i + 1] == 0 && src[i + 2] <= 3) { \
592 if (src[i + 2] != 3) { \
593 /* startcode, so we must be past the end */ \
594 length = i; \
595 } \
596 break; \
597 }
598
599 #if HAVE_FAST_UNALIGNED
600 #define FIND_FIRST_ZERO \
601 if (i > 0 && !src[i]) \
602 i--; \
603 while (src[i]) \
604 i++
605
606 #if HAVE_FAST_64BIT
607 for (i = 0; i + 1 < length; i += 9) {
608 if (!((~AV_RN64A(src + i) &
609 (AV_RN64A(src + i) - 0x0100010001000101ULL)) &
610 0x8000800080008080ULL))
611 continue;
612 FIND_FIRST_ZERO;
613 STARTCODE_TEST;
614 i -= 7;
615 }
616 #else
617 for (i = 0; i + 1 < length; i += 5) {
618 if (!((~AV_RN32A(src + i) &
619 (AV_RN32A(src + i) - 0x01000101U)) &
620 0x80008080U))
621 continue;
622 FIND_FIRST_ZERO;
623 STARTCODE_TEST;
624 i -= 3;
625 }
626 #endif
627 #else
628 for (i = 0; i + 1 < length; i += 2) {
629 if (src[i])
630 continue;
631 if (i > 0 && src[i - 1] == 0)
632 i--;
633 STARTCODE_TEST;
634 }
635 #endif
636
637 if (i >= length - 1) { // no escaped 0
638 *dst_length = length;
639 *consumed = length + 1; // +1 for the header
640 return src;
641 }
642
643 // use second escape buffer for inter data
644 bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0;
645 av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx],
646 length + FF_INPUT_BUFFER_PADDING_SIZE);
647 dst = h->rbsp_buffer[bufidx];
648
649 if (dst == NULL)
650 return NULL;
651
652 memcpy(dst, src, i);
653 si = di = i;
654 while (si + 2 < length) {
655 // remove escapes (very rare 1:2^22)
656 if (src[si + 2] > 3) {
657 dst[di++] = src[si++];
658 dst[di++] = src[si++];
659 } else if (src[si] == 0 && src[si + 1] == 0) {
660 if (src[si + 2] == 3) { // escape
661 dst[di++] = 0;
662 dst[di++] = 0;
663 si += 3;
664 continue;
665 } else // next start code
666 goto nsc;
667 }
668
669 dst[di++] = src[si++];
670 }
671 while (si < length)
672 dst[di++] = src[si++];
673
674 nsc:
675 memset(dst + di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
676
677 *dst_length = di;
678 *consumed = si + 1; // +1 for the header
679 /* FIXME store exact number of bits in the getbitcontext
680 * (it is needed for decoding) */
681 return dst;
682 }
683
684 /**
685 * Identify the exact end of the bitstream
686 * @return the length of the trailing, or 0 if damaged
687 */
688 static int decode_rbsp_trailing(H264Context *h, const uint8_t *src)
689 {
690 int v = *src;
691 int r;
692
693 tprintf(h->avctx, "rbsp trailing %X\n", v);
694
695 for (r = 1; r < 9; r++) {
696 if (v & 1)
697 return r;
698 v >>= 1;
699 }
700 return 0;
701 }
702
703 static inline int get_lowest_part_list_y(H264Context *h, Picture *pic, int n,
704 int height, int y_offset, int list)
705 {
706 int raw_my = h->mv_cache[list][scan8[n]][1];
707 int filter_height_up = (raw_my & 3) ? 2 : 0;
708 int filter_height_down = (raw_my & 3) ? 3 : 0;
709 int full_my = (raw_my >> 2) + y_offset;
710 int top = full_my - filter_height_up;
711 int bottom = full_my + filter_height_down + height;
712
713 return FFMAX(abs(top), bottom);
714 }
715
716 static inline void get_lowest_part_y(H264Context *h, int refs[2][48], int n,
717 int height, int y_offset, int list0,
718 int list1, int *nrefs)
719 {
720 int my;
721
722 y_offset += 16 * (h->mb_y >> MB_FIELD(h));
723
724 if (list0) {
725 int ref_n = h->ref_cache[0][scan8[n]];
726 Picture *ref = &h->ref_list[0][ref_n];
727
728 // Error resilience puts the current picture in the ref list.
729 // Don't try to wait on these as it will cause a deadlock.
730 // Fields can wait on each other, though.
731 if (ref->tf.progress->data != h->cur_pic.tf.progress->data ||
732 (ref->reference & 3) != h->picture_structure) {
733 my = get_lowest_part_list_y(h, ref, n, height, y_offset, 0);
734 if (refs[0][ref_n] < 0)
735 nrefs[0] += 1;
736 refs[0][ref_n] = FFMAX(refs[0][ref_n], my);
737 }
738 }
739
740 if (list1) {
741 int ref_n = h->ref_cache[1][scan8[n]];
742 Picture *ref = &h->ref_list[1][ref_n];
743
744 if (ref->tf.progress->data != h->cur_pic.tf.progress->data ||
745 (ref->reference & 3) != h->picture_structure) {
746 my = get_lowest_part_list_y(h, ref, n, height, y_offset, 1);
747 if (refs[1][ref_n] < 0)
748 nrefs[1] += 1;
749 refs[1][ref_n] = FFMAX(refs[1][ref_n], my);
750 }
751 }
752 }
753
754 /**
755 * Wait until all reference frames are available for MC operations.
756 *
757 * @param h the H264 context
758 */
759 static void await_references(H264Context *h)
760 {
761 const int mb_xy = h->mb_xy;
762 const int mb_type = h->cur_pic.mb_type[mb_xy];
763 int refs[2][48];
764 int nrefs[2] = { 0 };
765 int ref, list;
766
767 memset(refs, -1, sizeof(refs));
768
769 if (IS_16X16(mb_type)) {
770 get_lowest_part_y(h, refs, 0, 16, 0,
771 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
772 } else if (IS_16X8(mb_type)) {
773 get_lowest_part_y(h, refs, 0, 8, 0,
774 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
775 get_lowest_part_y(h, refs, 8, 8, 8,
776 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
777 } else if (IS_8X16(mb_type)) {
778 get_lowest_part_y(h, refs, 0, 16, 0,
779 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
780 get_lowest_part_y(h, refs, 4, 16, 0,
781 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
782 } else {
783 int i;
784
785 assert(IS_8X8(mb_type));
786
787 for (i = 0; i < 4; i++) {
788 const int sub_mb_type = h->sub_mb_type[i];
789 const int n = 4 * i;
790 int y_offset = (i & 2) << 2;
791
792 if (IS_SUB_8X8(sub_mb_type)) {
793 get_lowest_part_y(h, refs, n, 8, y_offset,
794 IS_DIR(sub_mb_type, 0, 0),
795 IS_DIR(sub_mb_type, 0, 1),
796 nrefs);
797 } else if (IS_SUB_8X4(sub_mb_type)) {
798 get_lowest_part_y(h, refs, n, 4, y_offset,
799 IS_DIR(sub_mb_type, 0, 0),
800 IS_DIR(sub_mb_type, 0, 1),
801 nrefs);
802 get_lowest_part_y(h, refs, n + 2, 4, y_offset + 4,
803 IS_DIR(sub_mb_type, 0, 0),
804 IS_DIR(sub_mb_type, 0, 1),
805 nrefs);
806 } else if (IS_SUB_4X8(sub_mb_type)) {
807 get_lowest_part_y(h, refs, n, 8, y_offset,
808 IS_DIR(sub_mb_type, 0, 0),
809 IS_DIR(sub_mb_type, 0, 1),
810 nrefs);
811 get_lowest_part_y(h, refs, n + 1, 8, y_offset,
812 IS_DIR(sub_mb_type, 0, 0),
813 IS_DIR(sub_mb_type, 0, 1),
814 nrefs);
815 } else {
816 int j;
817 assert(IS_SUB_4X4(sub_mb_type));
818 for (j = 0; j < 4; j++) {
819 int sub_y_offset = y_offset + 2 * (j & 2);
820 get_lowest_part_y(h, refs, n + j, 4, sub_y_offset,
821 IS_DIR(sub_mb_type, 0, 0),
822 IS_DIR(sub_mb_type, 0, 1),
823 nrefs);
824 }
825 }
826 }
827 }
828
829 for (list = h->list_count - 1; list >= 0; list--)
830 for (ref = 0; ref < 48 && nrefs[list]; ref++) {
831 int row = refs[list][ref];
832 if (row >= 0) {
833 Picture *ref_pic = &h->ref_list[list][ref];
834 int ref_field = ref_pic->reference - 1;
835 int ref_field_picture = ref_pic->field_picture;
836 int pic_height = 16 * h->mb_height >> ref_field_picture;
837
838 row <<= MB_MBAFF(h);
839 nrefs[list]--;
840
841 if (!FIELD_PICTURE(h) && ref_field_picture) { // frame referencing two fields
842 ff_thread_await_progress(&ref_pic->tf,
843 FFMIN((row >> 1) - !(row & 1),
844 pic_height - 1),
845 1);
846 ff_thread_await_progress(&ref_pic->tf,
847 FFMIN((row >> 1), pic_height - 1),
848 0);
849 } else if (FIELD_PICTURE(h) && !ref_field_picture) { // field referencing one field of a frame
850 ff_thread_await_progress(&ref_pic->tf,
851 FFMIN(row * 2 + ref_field,
852 pic_height - 1),
853 0);
854 } else if (FIELD_PICTURE(h)) {
855 ff_thread_await_progress(&ref_pic->tf,
856 FFMIN(row, pic_height - 1),
857 ref_field);
858 } else {
859 ff_thread_await_progress(&ref_pic->tf,
860 FFMIN(row, pic_height - 1),
861 0);
862 }
863 }
864 }
865 }
866
867 static av_always_inline void mc_dir_part(H264Context *h, Picture *pic,
868 int n, int square, int height,
869 int delta, int list,
870 uint8_t *dest_y, uint8_t *dest_cb,
871 uint8_t *dest_cr,
872 int src_x_offset, int src_y_offset,
873 qpel_mc_func *qpix_op,
874 h264_chroma_mc_func chroma_op,
875 int pixel_shift, int chroma_idc)
876 {
877 const int mx = h->mv_cache[list][scan8[n]][0] + src_x_offset * 8;
878 int my = h->mv_cache[list][scan8[n]][1] + src_y_offset * 8;
879 const int luma_xy = (mx & 3) + ((my & 3) << 2);
880 ptrdiff_t offset = ((mx >> 2) << pixel_shift) + (my >> 2) * h->mb_linesize;
881 uint8_t *src_y = pic->f.data[0] + offset;
882 uint8_t *src_cb, *src_cr;
883 int extra_width = 0;
884 int extra_height = 0;
885 int emu = 0;
886 const int full_mx = mx >> 2;
887 const int full_my = my >> 2;
888 const int pic_width = 16 * h->mb_width;
889 const int pic_height = 16 * h->mb_height >> MB_FIELD(h);
890 int ysh;
891
892 if (mx & 7)
893 extra_width -= 3;
894 if (my & 7)
895 extra_height -= 3;
896
897 if (full_mx < 0 - extra_width ||
898 full_my < 0 - extra_height ||
899 full_mx + 16 /*FIXME*/ > pic_width + extra_width ||
900 full_my + 16 /*FIXME*/ > pic_height + extra_height) {
901 h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
902 src_y - (2 << pixel_shift) - 2 * h->mb_linesize,
903 h->mb_linesize, h->mb_linesize,
904 16 + 5, 16 + 5 /*FIXME*/, full_mx - 2,
905 full_my - 2, pic_width, pic_height);
906 src_y = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
907 emu = 1;
908 }
909
910 qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); // FIXME try variable height perhaps?
911 if (!square)
912 qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
913
914 if (CONFIG_GRAY && h->flags & CODEC_FLAG_GRAY)
915 return;
916
917 if (chroma_idc == 3 /* yuv444 */) {
918 src_cb = pic->f.data[1] + offset;
919 if (emu) {
920 h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
921 src_cb - (2 << pixel_shift) - 2 * h->mb_linesize,
922 h->mb_linesize, h->mb_linesize,
923 16 + 5, 16 + 5 /*FIXME*/,
924 full_mx - 2, full_my - 2,
925 pic_width, pic_height);
926 src_cb = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
927 }
928 qpix_op[luma_xy](dest_cb, src_cb, h->mb_linesize); // FIXME try variable height perhaps?
929 if (!square)
930 qpix_op[luma_xy](dest_cb + delta, src_cb + delta, h->mb_linesize);
931
932 src_cr = pic->f.data[2] + offset;
933 if (emu) {
934 h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
935 src_cr - (2 << pixel_shift) - 2 * h->mb_linesize,
936 h->mb_linesize, h->mb_linesize,
937 16 + 5, 16 + 5 /*FIXME*/,
938 full_mx - 2, full_my - 2,
939 pic_width, pic_height);
940 src_cr = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
941 }
942 qpix_op[luma_xy](dest_cr, src_cr, h->mb_linesize); // FIXME try variable height perhaps?
943 if (!square)
944 qpix_op[luma_xy](dest_cr + delta, src_cr + delta, h->mb_linesize);
945 return;
946 }
947
948 ysh = 3 - (chroma_idc == 2 /* yuv422 */);
949 if (chroma_idc == 1 /* yuv420 */ && MB_FIELD(h)) {
950 // chroma offset when predicting from a field of opposite parity
951 my += 2 * ((h->mb_y & 1) - (pic->reference - 1));
952 emu |= (my >> 3) < 0 || (my >> 3) + 8 >= (pic_height >> 1);
953 }
954
955 src_cb = pic->f.data[1] + ((mx >> 3) << pixel_shift) +
956 (my >> ysh) * h->mb_uvlinesize;
957 src_cr = pic->f.data[2] + ((mx >> 3) << pixel_shift) +
958 (my >> ysh) * h->mb_uvlinesize;
959
960 if (emu) {
961 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,
962 h->mb_uvlinesize, h->mb_uvlinesize,
963 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
964 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
965 src_cb = h->edge_emu_buffer;
966 }
967 chroma_op(dest_cb, src_cb, h->mb_uvlinesize,
968 height >> (chroma_idc == 1 /* yuv420 */),
969 mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
970
971 if (emu) {
972 h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,
973 h->mb_uvlinesize, h->mb_uvlinesize,
974 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
975 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
976 src_cr = h->edge_emu_buffer;
977 }
978 chroma_op(dest_cr, src_cr, h->mb_uvlinesize, height >> (chroma_idc == 1 /* yuv420 */),
979 mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
980 }
981
982 static av_always_inline void mc_part_std(H264Context *h, int n, int square,
983 int height, int delta,
984 uint8_t *dest_y, uint8_t *dest_cb,
985 uint8_t *dest_cr,
986 int x_offset, int y_offset,
987 qpel_mc_func *qpix_put,
988 h264_chroma_mc_func chroma_put,
989 qpel_mc_func *qpix_avg,
990 h264_chroma_mc_func chroma_avg,
991 int list0, int list1,
992 int pixel_shift, int chroma_idc)
993 {
994 qpel_mc_func *qpix_op = qpix_put;
995 h264_chroma_mc_func chroma_op = chroma_put;
996
997 dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
998 if (chroma_idc == 3 /* yuv444 */) {
999 dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
1000 dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
1001 } else if (chroma_idc == 2 /* yuv422 */) {
1002 dest_cb += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
1003 dest_cr += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
1004 } else { /* yuv420 */
1005 dest_cb += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
1006 dest_cr += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
1007 }
1008 x_offset += 8 * h->mb_x;
1009 y_offset += 8 * (h->mb_y >> MB_FIELD(h));
1010
1011 if (list0) {
1012 Picture *ref = &h->ref_list[0][h->ref_cache[0][scan8[n]]];
1013 mc_dir_part(h, ref, n, square, height, delta, 0,
1014 dest_y, dest_cb, dest_cr, x_offset, y_offset,
1015 qpix_op, chroma_op, pixel_shift, chroma_idc);
1016
1017 qpix_op = qpix_avg;
1018 chroma_op = chroma_avg;
1019 }
1020
1021 if (list1) {
1022 Picture *ref = &h->ref_list[1][h->ref_cache[1][scan8[n]]];
1023 mc_dir_part(h, ref, n, square, height, delta, 1,
1024 dest_y, dest_cb, dest_cr, x_offset, y_offset,
1025 qpix_op, chroma_op, pixel_shift, chroma_idc);
1026 }
1027 }
1028
1029 static av_always_inline void mc_part_weighted(H264Context *h, int n, int square,
1030 int height, int delta,
1031 uint8_t *dest_y, uint8_t *dest_cb,
1032 uint8_t *dest_cr,
1033 int x_offset, int y_offset,
1034 qpel_mc_func *qpix_put,
1035 h264_chroma_mc_func chroma_put,
1036 h264_weight_func luma_weight_op,
1037 h264_weight_func chroma_weight_op,
1038 h264_biweight_func luma_weight_avg,
1039 h264_biweight_func chroma_weight_avg,
1040 int list0, int list1,
1041 int pixel_shift, int chroma_idc)
1042 {
1043 int chroma_height;
1044
1045 dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
1046 if (chroma_idc == 3 /* yuv444 */) {
1047 chroma_height = height;
1048 chroma_weight_avg = luma_weight_avg;
1049 chroma_weight_op = luma_weight_op;
1050 dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
1051 dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
1052 } else if (chroma_idc == 2 /* yuv422 */) {
1053 chroma_height = height;
1054 dest_cb += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
1055 dest_cr += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
1056 } else { /* yuv420 */
1057 chroma_height = height >> 1;
1058 dest_cb += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
1059 dest_cr += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
1060 }
1061 x_offset += 8 * h->mb_x;
1062 y_offset += 8 * (h->mb_y >> MB_FIELD(h));
1063
1064 if (list0 && list1) {
1065 /* don't optimize for luma-only case, since B-frames usually
1066 * use implicit weights => chroma too. */
1067 uint8_t *tmp_cb = h->bipred_scratchpad;
1068 uint8_t *tmp_cr = h->bipred_scratchpad + (16 << pixel_shift);
1069 uint8_t *tmp_y = h->bipred_scratchpad + 16 * h->mb_uvlinesize;
1070 int refn0 = h->ref_cache[0][scan8[n]];
1071 int refn1 = h->ref_cache[1][scan8[n]];
1072
1073 mc_dir_part(h, &h->ref_list[0][refn0], n, square, height, delta, 0,
1074 dest_y, dest_cb, dest_cr,
1075 x_offset, y_offset, qpix_put, chroma_put,
1076 pixel_shift, chroma_idc);
1077 mc_dir_part(h, &h->ref_list[1][refn1], n, square, height, delta, 1,
1078 tmp_y, tmp_cb, tmp_cr,
1079 x_offset, y_offset, qpix_put, chroma_put,
1080 pixel_shift, chroma_idc);
1081
1082 if (h->use_weight == 2) {
1083 int weight0 = h->implicit_weight[refn0][refn1][h->mb_y & 1];
1084 int weight1 = 64 - weight0;
1085 luma_weight_avg(dest_y, tmp_y, h->mb_linesize,
1086 height, 5, weight0, weight1, 0);
1087 chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize,
1088 chroma_height, 5, weight0, weight1, 0);
1089 chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize,
1090 chroma_height, 5, weight0, weight1, 0);
1091 } else {
1092 luma_weight_avg(dest_y, tmp_y, h->mb_linesize, height,
1093 h->luma_log2_weight_denom,
1094 h->luma_weight[refn0][0][0],
1095 h->luma_weight[refn1][1][0],
1096 h->luma_weight[refn0][0][1] +
1097 h->luma_weight[refn1][1][1]);
1098 chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, chroma_height,
1099 h->chroma_log2_weight_denom,
1100 h->chroma_weight[refn0][0][0][0],
1101 h->chroma_weight[refn1][1][0][0],
1102 h->chroma_weight[refn0][0][0][1] +
1103 h->chroma_weight[refn1][1][0][1]);
1104 chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, chroma_height,
1105 h->chroma_log2_weight_denom,
1106 h->chroma_weight[refn0][0][1][0],
1107 h->chroma_weight[refn1][1][1][0],
1108 h->chroma_weight[refn0][0][1][1] +
1109 h->chroma_weight[refn1][1][1][1]);
1110 }
1111 } else {
1112 int list = list1 ? 1 : 0;
1113 int refn = h->ref_cache[list][scan8[n]];
1114 Picture *ref = &h->ref_list[list][refn];
1115 mc_dir_part(h, ref, n, square, height, delta, list,
1116 dest_y, dest_cb, dest_cr, x_offset, y_offset,
1117 qpix_put, chroma_put, pixel_shift, chroma_idc);
1118
1119 luma_weight_op(dest_y, h->mb_linesize, height,
1120 h->luma_log2_weight_denom,
1121 h->luma_weight[refn][list][0],
1122 h->luma_weight[refn][list][1]);
1123 if (h->use_weight_chroma) {
1124 chroma_weight_op(dest_cb, h->mb_uvlinesize, chroma_height,
1125 h->chroma_log2_weight_denom,
1126 h->chroma_weight[refn][list][0][0],
1127 h->chroma_weight[refn][list][0][1]);
1128 chroma_weight_op(dest_cr, h->mb_uvlinesize, chroma_height,
1129 h->chroma_log2_weight_denom,
1130 h->chroma_weight[refn][list][1][0],
1131 h->chroma_weight[refn][list][1][1]);
1132 }
1133 }
1134 }
1135
1136 static av_always_inline void prefetch_motion(H264Context *h, int list,
1137 int pixel_shift, int chroma_idc)
1138 {
1139 /* fetch pixels for estimated mv 4 macroblocks ahead
1140 * optimized for 64byte cache lines */
1141 const int refn = h->ref_cache[list][scan8[0]];
1142 if (refn >= 0) {
1143 const int mx = (h->mv_cache[list][scan8[0]][0] >> 2) + 16 * h->mb_x + 8;
1144 const int my = (h->mv_cache[list][scan8[0]][1] >> 2) + 16 * h->mb_y;
1145 uint8_t **src = h->ref_list[list][refn].f.data;
1146 int off = (mx << pixel_shift) +
1147 (my + (h->mb_x & 3) * 4) * h->mb_linesize +
1148 (64 << pixel_shift);
1149 h->vdsp.prefetch(src[0] + off, h->linesize, 4);
1150 if (chroma_idc == 3 /* yuv444 */) {
1151 h->vdsp.prefetch(src[1] + off, h->linesize, 4);
1152 h->vdsp.prefetch(src[2] + off, h->linesize, 4);
1153 } else {
1154 off = ((mx >> 1) << pixel_shift) +
1155 ((my >> 1) + (h->mb_x & 7)) * h->uvlinesize +
1156 (64 << pixel_shift);
1157 h->vdsp.prefetch(src[1] + off, src[2] - src[1], 2);
1158 }
1159 }
1160 }
1161
1162 static void free_tables(H264Context *h, int free_rbsp)
1163 {
1164 int i;
1165 H264Context *hx;
1166
1167 av_freep(&h->intra4x4_pred_mode);
1168 av_freep(&h->chroma_pred_mode_table);
1169 av_freep(&h->cbp_table);
1170 av_freep(&h->mvd_table[0]);
1171 av_freep(&h->mvd_table[1]);
1172 av_freep(&h->direct_table);
1173 av_freep(&h->non_zero_count);
1174 av_freep(&h->slice_table_base);
1175 h->slice_table = NULL;
1176 av_freep(&h->list_counts);
1177
1178 av_freep(&h->mb2b_xy);
1179 av_freep(&h->mb2br_xy);
1180
1181 av_buffer_pool_uninit(&h->qscale_table_pool);
1182 av_buffer_pool_uninit(&h->mb_type_pool);
1183 av_buffer_pool_uninit(&h->motion_val_pool);
1184 av_buffer_pool_uninit(&h->ref_index_pool);
1185
1186 if (free_rbsp && h->DPB) {
1187 for (i = 0; i < MAX_PICTURE_COUNT; i++)
1188 unref_picture(h, &h->DPB[i]);
1189 av_freep(&h->DPB);
1190 } else if (h->DPB) {
1191 for (i = 0; i < MAX_PICTURE_COUNT; i++)
1192 h->DPB[i].needs_realloc = 1;
1193 }
1194
1195 h->cur_pic_ptr = NULL;
1196
1197 for (i = 0; i < MAX_THREADS; i++) {
1198 hx = h->thread_context[i];
1199 if (!hx)
1200 continue;
1201 av_freep(&hx->top_borders[1]);
1202 av_freep(&hx->top_borders[0]);
1203 av_freep(&hx->bipred_scratchpad);
1204 av_freep(&hx->edge_emu_buffer);
1205 av_freep(&hx->dc_val_base);
1206 av_freep(&hx->me.scratchpad);
1207 av_freep(&hx->er.mb_index2xy);
1208 av_freep(&hx->er.error_status_table);
1209 av_freep(&hx->er.er_temp_buffer);
1210 av_freep(&hx->er.mbintra_table);
1211 av_freep(&hx->er.mbskip_table);
1212
1213 if (free_rbsp) {
1214 av_freep(&hx->rbsp_buffer[1]);
1215 av_freep(&hx->rbsp_buffer[0]);
1216 hx->rbsp_buffer_size[0] = 0;
1217 hx->rbsp_buffer_size[1] = 0;
1218 }
1219 if (i)
1220 av_freep(&h->thread_context[i]);
1221 }
1222 }
1223
1224 static void init_dequant8_coeff_table(H264Context *h)
1225 {
1226 int i, j, q, x;
1227 const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
1228
1229 for (i = 0; i < 6; i++) {
1230 h->dequant8_coeff[i] = h->dequant8_buffer[i];
1231 for (j = 0; j < i; j++)
1232 if (!memcmp(h->pps.scaling_matrix8[j], h->pps.scaling_matrix8[i],
1233 64 * sizeof(uint8_t))) {
1234 h->dequant8_coeff[i] = h->dequant8_buffer[j];
1235 break;
1236 }
1237 if (j < i)
1238 continue;
1239
1240 for (q = 0; q < max_qp + 1; q++) {
1241 int shift = div6[q];
1242 int idx = rem6[q];
1243 for (x = 0; x < 64; x++)
1244 h->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
1245 ((uint32_t)dequant8_coeff_init[idx][dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
1246 h->pps.scaling_matrix8[i][x]) << shift;
1247 }
1248 }
1249 }
1250
1251 static void init_dequant4_coeff_table(H264Context *h)
1252 {
1253 int i, j, q, x;
1254 const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
1255 for (i = 0; i < 6; i++) {
1256 h->dequant4_coeff[i] = h->dequant4_buffer[i];
1257 for (j = 0; j < i; j++)
1258 if (!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i],
1259 16 * sizeof(uint8_t))) {
1260 h->dequant4_coeff[i] = h->dequant4_buffer[j];
1261 break;
1262 }
1263 if (j < i)
1264 continue;
1265
1266 for (q = 0; q < max_qp + 1; q++) {
1267 int shift = div6[q] + 2;
1268 int idx = rem6[q];
1269 for (x = 0; x < 16; x++)
1270 h->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
1271 ((uint32_t)dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
1272 h->pps.scaling_matrix4[i][x]) << shift;
1273 }
1274 }
1275 }
1276
1277 static void init_dequant_tables(H264Context *h)
1278 {
1279 int i, x;
1280 init_dequant4_coeff_table(h);
1281 if (h->pps.transform_8x8_mode)
1282 init_dequant8_coeff_table(h);
1283 if (h->sps.transform_bypass) {
1284 for (i = 0; i < 6; i++)
1285 for (x = 0; x < 16; x++)
1286 h->dequant4_coeff[i][0][x] = 1 << 6;
1287 if (h->pps.transform_8x8_mode)
1288 for (i = 0; i < 6; i++)
1289 for (x = 0; x < 64; x++)
1290 h->dequant8_coeff[i][0][x] = 1 << 6;
1291 }
1292 }
1293
1294 int ff_h264_alloc_tables(H264Context *h)
1295 {
1296 const int big_mb_num = h->mb_stride * (h->mb_height + 1);
1297 const int row_mb_num = h->mb_stride * 2 * h->avctx->thread_count;
1298 int x, y, i;
1299
1300 FF_ALLOCZ_OR_GOTO(h->avctx, h->intra4x4_pred_mode,
1301 row_mb_num * 8 * sizeof(uint8_t), fail)
1302 FF_ALLOCZ_OR_GOTO(h->avctx, h->non_zero_count,
1303 big_mb_num * 48 * sizeof(uint8_t), fail)
1304 FF_ALLOCZ_OR_GOTO(h->avctx, h->slice_table_base,
1305 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
1306 FF_ALLOCZ_OR_GOTO(h->avctx, h->cbp_table,
1307 big_mb_num * sizeof(uint16_t), fail)
1308 FF_ALLOCZ_OR_GOTO(h->avctx, h->chroma_pred_mode_table,
1309 big_mb_num * sizeof(uint8_t), fail)
1310 FF_ALLOCZ_OR_GOTO(h->avctx, h->mvd_table[0],
1311 16 * row_mb_num * sizeof(uint8_t), fail);
1312 FF_ALLOCZ_OR_GOTO(h->avctx, h->mvd_table[1],
1313 16 * row_mb_num * sizeof(uint8_t), fail);
1314 FF_ALLOCZ_OR_GOTO(h->avctx, h->direct_table,
1315 4 * big_mb_num * sizeof(uint8_t), fail);
1316 FF_ALLOCZ_OR_GOTO(h->avctx, h->list_counts,
1317 big_mb_num * sizeof(uint8_t), fail)
1318
1319 memset(h->slice_table_base, -1,
1320 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
1321 h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
1322
1323 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2b_xy,
1324 big_mb_num * sizeof(uint32_t), fail);
1325 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2br_xy,
1326 big_mb_num * sizeof(uint32_t), fail);
1327 for (y = 0; y < h->mb_height; y++)
1328 for (x = 0; x < h->mb_width; x++) {
1329 const int mb_xy = x + y * h->mb_stride;
1330 const int b_xy = 4 * x + 4 * y * h->b_stride;
1331
1332 h->mb2b_xy[mb_xy] = b_xy;
1333 h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
1334 }
1335
1336 if (!h->dequant4_coeff[0])
1337 init_dequant_tables(h);
1338
1339 if (!h->DPB) {
1340 h->DPB = av_mallocz_array(MAX_PICTURE_COUNT, sizeof(*h->DPB));
1341 if (!h->DPB)
1342 return AVERROR(ENOMEM);
1343 for (i = 0; i < MAX_PICTURE_COUNT; i++)
1344 av_frame_unref(&h->DPB[i].f);
1345 av_frame_unref(&h->cur_pic.f);
1346 }
1347
1348 return 0;
1349
1350 fail:
1351 free_tables(h, 1);
1352 return AVERROR(ENOMEM);
1353 }
1354
1355 /**
1356 * Mimic alloc_tables(), but for every context thread.
1357 */
1358 static void clone_tables(H264Context *dst, H264Context *src, int i)
1359 {
1360 dst->intra4x4_pred_mode = src->intra4x4_pred_mode + i * 8 * 2 * src->mb_stride;
1361 dst->non_zero_count = src->non_zero_count;
1362 dst->slice_table = src->slice_table;
1363 dst->cbp_table = src->cbp_table;
1364 dst->mb2b_xy = src->mb2b_xy;
1365 dst->mb2br_xy = src->mb2br_xy;
1366 dst->chroma_pred_mode_table = src->chroma_pred_mode_table;
1367 dst->mvd_table[0] = src->mvd_table[0] + i * 8 * 2 * src->mb_stride;
1368 dst->mvd_table[1] = src->mvd_table[1] + i * 8 * 2 * src->mb_stride;
1369 dst->direct_table = src->direct_table;
1370 dst->list_counts = src->list_counts;
1371 dst->DPB = src->DPB;
1372 dst->cur_pic_ptr = src->cur_pic_ptr;
1373 dst->cur_pic = src->cur_pic;
1374 dst->bipred_scratchpad = NULL;
1375 dst->edge_emu_buffer = NULL;
1376 dst->me.scratchpad = NULL;
1377 ff_h264_pred_init(&dst->hpc, src->avctx->codec_id, src->sps.bit_depth_luma,
1378 src->sps.chroma_format_idc);
1379 }
1380
1381 /**
1382 * Init context
1383 * Allocate buffers which are not shared amongst multiple threads.
1384 */
1385 static int context_init(H264Context *h)
1386 {
1387 ERContext *er = &h->er;
1388 int mb_array_size = h->mb_height * h->mb_stride;
1389 int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
1390 int c_size = h->mb_stride * (h->mb_height + 1);
1391 int yc_size = y_size + 2 * c_size;
1392 int x, y, i;
1393
1394 FF_ALLOCZ_OR_GOTO(h->avctx, h->top_borders[0],
1395 h->mb_width * 16 * 3 * sizeof(uint8_t) * 2, fail)
1396 FF_ALLOCZ_OR_GOTO(h->avctx, h->top_borders[1],
1397 h->mb_width * 16 * 3 * sizeof(uint8_t) * 2, fail)
1398
1399 h->ref_cache[0][scan8[5] + 1] =
1400 h->ref_cache[0][scan8[7] + 1] =
1401 h->ref_cache[0][scan8[13] + 1] =
1402 h->ref_cache[1][scan8[5] + 1] =
1403 h->ref_cache[1][scan8[7] + 1] =
1404 h->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
1405
1406 if (CONFIG_ERROR_RESILIENCE) {
1407 /* init ER */
1408 er->avctx = h->avctx;
1409 er->dsp = &h->dsp;
1410 er->decode_mb = h264_er_decode_mb;
1411 er->opaque = h;
1412 er->quarter_sample = 1;
1413
1414 er->mb_num = h->mb_num;
1415 er->mb_width = h->mb_width;
1416 er->mb_height = h->mb_height;
1417 er->mb_stride = h->mb_stride;
1418 er->b8_stride = h->mb_width * 2 + 1;
1419
1420 FF_ALLOCZ_OR_GOTO(h->avctx, er->mb_index2xy, (h->mb_num + 1) * sizeof(int),
1421 fail); // error ressilience code looks cleaner with this
1422 for (y = 0; y < h->mb_height; y++)
1423 for (x = 0; x < h->mb_width; x++)
1424 er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
1425
1426 er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
1427 h->mb_stride + h->mb_width;
1428
1429 FF_ALLOCZ_OR_GOTO(h->avctx, er->error_status_table,
1430 mb_array_size * sizeof(uint8_t), fail);
1431
1432 FF_ALLOC_OR_GOTO(h->avctx, er->mbintra_table, mb_array_size, fail);
1433 memset(er->mbintra_table, 1, mb_array_size);
1434
1435 FF_ALLOCZ_OR_GOTO(h->avctx, er->mbskip_table, mb_array_size + 2, fail);
1436
1437 FF_ALLOC_OR_GOTO(h->avctx, er->er_temp_buffer, h->mb_height * h->mb_stride,
1438 fail);
1439
1440 FF_ALLOCZ_OR_GOTO(h->avctx, h->dc_val_base, yc_size * sizeof(int16_t), fail);
1441 er->dc_val[0] = h->dc_val_base + h->mb_width * 2 + 2;
1442 er->dc_val[1] = h->dc_val_base + y_size + h->mb_stride + 1;
1443 er->dc_val[2] = er->dc_val[1] + c_size;
1444 for (i = 0; i < yc_size; i++)
1445 h->dc_val_base[i] = 1024;
1446 }
1447
1448 return 0;
1449
1450 fail:
1451 return AVERROR(ENOMEM); // free_tables will clean up for us
1452 }
1453
1454 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
1455 int parse_extradata);
1456
1457 int ff_h264_decode_extradata(H264Context *h)
1458 {
1459 AVCodecContext *avctx = h->avctx;
1460 int ret;
1461
1462 if (avctx->extradata[0] == 1) {
1463 int i, cnt, nalsize;
1464 unsigned char *p = avctx->extradata;
1465
1466 h->is_avc = 1;
1467
1468 if (avctx->extradata_size < 7) {
1469 av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
1470 return AVERROR_INVALIDDATA;
1471 }
1472 /* sps and pps in the avcC always have length coded with 2 bytes,
1473 * so put a fake nal_length_size = 2 while parsing them */
1474 h->nal_length_size = 2;
1475 // Decode sps from avcC
1476 cnt = *(p + 5) & 0x1f; // Number of sps
1477 p += 6;
1478 for (i = 0; i < cnt; i++) {
1479 nalsize = AV_RB16(p) + 2;
1480 if (p - avctx->extradata + nalsize > avctx->extradata_size)
1481 return AVERROR_INVALIDDATA;
1482 ret = decode_nal_units(h, p, nalsize, 1);
1483 if (ret < 0) {
1484 av_log(avctx, AV_LOG_ERROR,
1485 "Decoding sps %d from avcC failed\n", i);
1486 return ret;
1487 }
1488 p += nalsize;
1489 }
1490 // Decode pps from avcC
1491 cnt = *(p++); // Number of pps
1492 for (i = 0; i < cnt; i++) {
1493 nalsize = AV_RB16(p) + 2;
1494 if (p - avctx->extradata + nalsize > avctx->extradata_size)
1495 return AVERROR_INVALIDDATA;
1496 ret = decode_nal_units(h, p, nalsize, 1);
1497 if (ret < 0) {
1498 av_log(avctx, AV_LOG_ERROR,
1499 "Decoding pps %d from avcC failed\n", i);
1500 return ret;
1501 }
1502 p += nalsize;
1503 }
1504 // Now store right nal length size, that will be used to parse all other nals
1505 h->nal_length_size = (avctx->extradata[4] & 0x03) + 1;
1506 } else {
1507 h->is_avc = 0;
1508 ret = decode_nal_units(h, avctx->extradata, avctx->extradata_size, 1);
1509 if (ret < 0)
1510 return ret;
1511 }
1512 return 0;
1513 }
1514
1515 av_cold int ff_h264_decode_init(AVCodecContext *avctx)
1516 {
1517 H264Context *h = avctx->priv_data;
1518 int i;
1519 int ret;
1520
1521 h->avctx = avctx;
1522
1523 h->bit_depth_luma = 8;
1524 h->chroma_format_idc = 1;
1525
1526 ff_h264dsp_init(&h->h264dsp, 8, 1);
1527 ff_h264chroma_init(&h->h264chroma, h->sps.bit_depth_chroma);
1528 ff_h264qpel_init(&h->h264qpel, 8);
1529 ff_h264_pred_init(&h->hpc, h->avctx->codec_id, 8, 1);
1530
1531 h->dequant_coeff_pps = -1;
1532
1533 /* needed so that IDCT permutation is known early */
1534 if (CONFIG_ERROR_RESILIENCE)
1535 ff_dsputil_init(&h->dsp, h->avctx);
1536 ff_videodsp_init(&h->vdsp, 8);
1537
1538 memset(h->pps.scaling_matrix4, 16, 6 * 16 * sizeof(uint8_t));
1539 memset(h->pps.scaling_matrix8, 16, 2 * 64 * sizeof(uint8_t));
1540
1541 h->picture_structure = PICT_FRAME;
1542 h->slice_context_count = 1;
1543 h->workaround_bugs = avctx->workaround_bugs;
1544 h->flags = avctx->flags;
1545
1546 /* set defaults */
1547 // s->decode_mb = ff_h263_decode_mb;
1548 if (!avctx->has_b_frames)
1549 h->low_delay = 1;
1550
1551 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
1552
1553 ff_h264_decode_init_vlc();
1554
1555 ff_init_cabac_states();
1556
1557 h->pixel_shift = 0;
1558 h->sps.bit_depth_luma = avctx->bits_per_raw_sample = 8;
1559
1560 h->thread_context[0] = h;
1561 h->outputed_poc = h->next_outputed_poc = INT_MIN;
1562 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
1563 h->last_pocs[i] = INT_MIN;
1564 h->prev_poc_msb = 1 << 16;
1565 h->x264_build = -1;
1566 ff_h264_reset_sei(h);
1567 h->recovery_frame = -1;
1568 h->frame_recovered = 0;
1569 if (avctx->codec_id == AV_CODEC_ID_H264) {
1570 if (avctx->ticks_per_frame == 1)
1571 h->avctx->time_base.den *= 2;
1572 avctx->ticks_per_frame = 2;
1573 }
1574
1575 if (avctx->extradata_size > 0 && avctx->extradata) {
1576 ret = ff_h264_decode_extradata(h);
1577 if (ret < 0)
1578 return ret;
1579 }
1580
1581 if (h->sps.bitstream_restriction_flag &&
1582 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
1583 h->avctx->has_b_frames = h->sps.num_reorder_frames;
1584 h->low_delay = 0;
1585 }
1586
1587 avctx->internal->allocate_progress = 1;
1588
1589 return 0;
1590 }
1591
1592 #define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b) + (size))))
1593 #undef REBASE_PICTURE
1594 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
1595 ((pic && pic >= old_ctx->DPB && \
1596 pic < old_ctx->DPB + MAX_PICTURE_COUNT) ? \
1597 &new_ctx->DPB[pic - old_ctx->DPB] : NULL)
1598
1599 static void copy_picture_range(Picture **to, Picture **from, int count,
1600 H264Context *new_base,
1601 H264Context *old_base)
1602 {
1603 int i;
1604
1605 for (i = 0; i < count; i++) {
1606 assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
1607 IN_RANGE(from[i], old_base->DPB,
1608 sizeof(Picture) * MAX_PICTURE_COUNT) ||
1609 !from[i]));
1610 to[i] = REBASE_PICTURE(from[i], new_base, old_base);
1611 }
1612 }
1613
1614 static int copy_parameter_set(void **to, void **from, int count, int size)
1615 {
1616 int i;
1617
1618 for (i = 0; i < count; i++) {
1619 if (to[i] && !from[i]) {
1620 av_freep(&to[i]);
1621 } else if (from[i] && !to[i]) {
1622 to[i] = av_malloc(size);
1623 if (!to[i])
1624 return AVERROR(ENOMEM);
1625 }
1626
1627 if (from[i])
1628 memcpy(to[i], from[i], size);
1629 }
1630
1631 return 0;
1632 }
1633
1634 static int decode_init_thread_copy(AVCodecContext *avctx)
1635 {
1636 H264Context *h = avctx->priv_data;
1637
1638 if (!avctx->internal->is_copy)
1639 return 0;
1640 memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
1641 memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
1642
1643 h->context_initialized = 0;
1644
1645 return 0;
1646 }
1647
1648 #define copy_fields(to, from, start_field, end_field) \
1649 memcpy(&to->start_field, &from->start_field, \
1650 (char *)&to->end_field - (char *)&to->start_field)
1651
1652 static int h264_slice_header_init(H264Context *, int);
1653
1654 static int h264_set_parameter_from_sps(H264Context *h);
1655
1656 static int decode_update_thread_context(AVCodecContext *dst,
1657 const AVCodecContext *src)
1658 {
1659 H264Context *h = dst->priv_data, *h1 = src->priv_data;
1660 int inited = h->context_initialized, err = 0;
1661 int context_reinitialized = 0;
1662 int i, ret;
1663
1664 if (dst == src || !h1->context_initialized)
1665 return 0;
1666
1667 if (inited &&
1668 (h->width != h1->width ||
1669 h->height != h1->height ||
1670 h->mb_width != h1->mb_width ||
1671 h->mb_height != h1->mb_height ||
1672 h->sps.bit_depth_luma != h1->sps.bit_depth_luma ||
1673 h->sps.chroma_format_idc != h1->sps.chroma_format_idc ||
1674 h->sps.colorspace != h1->sps.colorspace)) {
1675
1676 /* set bits_per_raw_sample to the previous value. the check for changed
1677 * bit depth in h264_set_parameter_from_sps() uses it and sets it to
1678 * the current value */
1679 h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
1680
1681 av_freep(&h->bipred_scratchpad);
1682
1683 h->width = h1->width;
1684 h->height = h1->height;
1685 h->mb_height = h1->mb_height;
1686 h->mb_width = h1->mb_width;
1687 h->mb_num = h1->mb_num;
1688 h->mb_stride = h1->mb_stride;
1689 h->b_stride = h1->b_stride;
1690
1691 if ((err = h264_slice_header_init(h, 1)) < 0) {
1692 av_log(h->avctx, AV_LOG_ERROR, "h264_slice_header_init() failed");
1693 return err;
1694 }
1695 context_reinitialized = 1;
1696
1697 /* update linesize on resize. The decoder doesn't
1698 * necessarily call h264_frame_start in the new thread */
1699 h->linesize = h1->linesize;
1700 h->uvlinesize = h1->uvlinesize;
1701
1702 /* copy block_offset since frame_start may not be called */
1703 memcpy(h->block_offset, h1->block_offset, sizeof(h->block_offset));
1704 }
1705
1706 if (!inited) {
1707 for (i = 0; i < MAX_SPS_COUNT; i++)
1708 av_freep(h->sps_buffers + i);
1709
1710 for (i = 0; i < MAX_PPS_COUNT; i++)
1711 av_freep(h->pps_buffers + i);
1712
1713 memcpy(h, h1, sizeof(*h1));
1714 memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
1715 memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
1716 memset(&h->er, 0, sizeof(h->er));
1717 memset(&h->me, 0, sizeof(h->me));
1718 memset(&h->mb, 0, sizeof(h->mb));
1719 memset(&h->mb_luma_dc, 0, sizeof(h->mb_luma_dc));
1720 memset(&h->mb_padding, 0, sizeof(h->mb_padding));
1721 h->context_initialized = 0;
1722
1723 memset(&h->cur_pic, 0, sizeof(h->cur_pic));
1724 av_frame_unref(&h->cur_pic.f);
1725 h->cur_pic.tf.f = &h->cur_pic.f;
1726
1727 h->avctx = dst;
1728 h->DPB = NULL;
1729 h->qscale_table_pool = NULL;
1730 h->mb_type_pool = NULL;
1731 h->ref_index_pool = NULL;
1732 h->motion_val_pool = NULL;
1733
1734 ret = ff_h264_alloc_tables(h);
1735 if (ret < 0) {
1736 av_log(dst, AV_LOG_ERROR, "Could not allocate memory for h264\n");
1737 return ret;
1738 }
1739 ret = context_init(h);
1740 if (ret < 0) {
1741 av_log(dst, AV_LOG_ERROR, "context_init() failed.\n");
1742 return ret;
1743 }
1744
1745 for (i = 0; i < 2; i++) {
1746 h->rbsp_buffer[i] = NULL;
1747 h->rbsp_buffer_size[i] = 0;
1748 }
1749 h->bipred_scratchpad = NULL;
1750 h->edge_emu_buffer = NULL;
1751
1752 h->thread_context[0] = h;
1753
1754 h->context_initialized = 1;
1755 }
1756
1757 h->avctx->coded_height = h1->avctx->coded_height;
1758 h->avctx->coded_width = h1->avctx->coded_width;
1759 h->avctx->width = h1->avctx->width;
1760 h->avctx->height = h1->avctx->height;
1761 h->coded_picture_number = h1->coded_picture_number;
1762 h->first_field = h1->first_field;
1763 h->picture_structure = h1->picture_structure;
1764 h->qscale = h1->qscale;
1765 h->droppable = h1->droppable;
1766 h->data_partitioning = h1->data_partitioning;
1767 h->low_delay = h1->low_delay;
1768
1769 for (i = 0; i < MAX_PICTURE_COUNT; i++) {
1770 unref_picture(h, &h->DPB[i]);
1771 if (h1->DPB[i].f.buf[0] &&
1772 (ret = ref_picture(h, &h->DPB[i], &h1->DPB[i])) < 0)
1773 return ret;
1774 }
1775
1776 h->cur_pic_ptr = REBASE_PICTURE(h1->cur_pic_ptr, h, h1);
1777 unref_picture(h, &h->cur_pic);
1778 if ((ret = ref_picture(h, &h->cur_pic, &h1->cur_pic)) < 0)
1779 return ret;
1780
1781 h->workaround_bugs = h1->workaround_bugs;
1782 h->low_delay = h1->low_delay;
1783 h->droppable = h1->droppable;
1784
1785 /* frame_start may not be called for the next thread (if it's decoding
1786 * a bottom field) so this has to be allocated here */
1787 err = alloc_scratch_buffers(h, h1->linesize);
1788 if (err < 0)
1789 return err;
1790
1791 // extradata/NAL handling
1792 h->is_avc = h1->is_avc;
1793
1794 // SPS/PPS
1795 if ((ret = copy_parameter_set((void **)h->sps_buffers,
1796 (void **)h1->sps_buffers,
1797 MAX_SPS_COUNT, sizeof(SPS))) < 0)
1798 return ret;
1799 h->sps = h1->sps;
1800 if ((ret = copy_parameter_set((void **)h->pps_buffers,
1801 (void **)h1->pps_buffers,
1802 MAX_PPS_COUNT, sizeof(PPS))) < 0)
1803 return ret;
1804 h->pps = h1->pps;
1805
1806 // Dequantization matrices
1807 // FIXME these are big - can they be only copied when PPS changes?
1808 copy_fields(h, h1, dequant4_buffer, dequant4_coeff);
1809
1810 for (i = 0; i < 6; i++)
1811 h->dequant4_coeff[i] = h->dequant4_buffer[0] +
1812 (h1->dequant4_coeff[i] - h1->dequant4_buffer[0]);
1813
1814 for (i = 0; i < 6; i++)
1815 h->dequant8_coeff[i] = h->dequant8_buffer[0] +
1816 (h1->dequant8_coeff[i] - h1->dequant8_buffer[0]);
1817
1818 h->dequant_coeff_pps = h1->dequant_coeff_pps;
1819
1820 // POC timing
1821 copy_fields(h, h1, poc_lsb, redundant_pic_count);
1822
1823 // reference lists
1824 copy_fields(h, h1, short_ref, cabac_init_idc);
1825
1826 copy_picture_range(h->short_ref, h1->short_ref, 32, h, h1);
1827 copy_picture_range(h->long_ref, h1->long_ref, 32, h, h1);
1828 copy_picture_range(h->delayed_pic, h1->delayed_pic,
1829 MAX_DELAYED_PIC_COUNT + 2, h, h1);
1830
1831 h->last_slice_type = h1->last_slice_type;
1832
1833 if (context_reinitialized)
1834 h264_set_parameter_from_sps(h);
1835
1836 if (!h->cur_pic_ptr)
1837 return 0;
1838
1839 if (!h->droppable) {
1840 err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1841 h->prev_poc_msb = h->poc_msb;
1842 h->prev_poc_lsb = h->poc_lsb;
1843 }
1844 h->prev_frame_num_offset = h->frame_num_offset;
1845 h->prev_frame_num = h->frame_num;
1846 h->outputed_poc = h->next_outputed_poc;
1847
1848 h->recovery_frame = h1->recovery_frame;
1849 h->frame_recovered = h1->frame_recovered;
1850
1851 return err;
1852 }
1853
1854 static int h264_frame_start(H264Context *h)
1855 {
1856 Picture *pic;
1857 int i, ret;
1858 const int pixel_shift = h->pixel_shift;
1859
1860 release_unused_pictures(h, 1);
1861 h->cur_pic_ptr = NULL;
1862
1863 i = find_unused_picture(h);
1864 if (i < 0) {
1865 av_log(h->avctx, AV_LOG_ERROR, "no frame buffer available\n");
1866 return i;
1867 }
1868 pic = &h->DPB[i];
1869
1870 pic->reference = h->droppable ? 0 : h->picture_structure;
1871 pic->f.coded_picture_number = h->coded_picture_number++;
1872 pic->field_picture = h->picture_structure != PICT_FRAME;
1873 /*
1874 * Zero key_frame here; IDR markings per slice in frame or fields are ORed
1875 * in later.
1876 * See decode_nal_units().
1877 */
1878 pic->f.key_frame = 0;
1879 pic->mmco_reset = 0;
1880 pic->recovered = 0;
1881
1882 if ((ret = alloc_picture(h, pic)) < 0)
1883 return ret;
1884
1885 h->cur_pic_ptr = pic;
1886 unref_picture(h, &h->cur_pic);
1887 if ((ret = ref_picture(h, &h->cur_pic, h->cur_pic_ptr)) < 0)
1888 return ret;
1889
1890 if (CONFIG_ERROR_RESILIENCE)
1891 ff_er_frame_start(&h->er);
1892
1893 assert(h->linesize && h->uvlinesize);
1894
1895 for (i = 0; i < 16; i++) {
1896 h->block_offset[i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * h->linesize * ((scan8[i] - scan8[0]) >> 3);
1897 h->block_offset[48 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * h->linesize * ((scan8[i] - scan8[0]) >> 3);
1898 }
1899 for (i = 0; i < 16; i++) {
1900 h->block_offset[16 + i] =
1901 h->block_offset[32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * h->uvlinesize * ((scan8[i] - scan8[0]) >> 3);
1902 h->block_offset[48 + 16 + i] =
1903 h->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * h->uvlinesize * ((scan8[i] - scan8[0]) >> 3);
1904 }
1905
1906 /* can't be in alloc_tables because linesize isn't known there.
1907 * FIXME: redo bipred weight to not require extra buffer? */
1908 for (i = 0; i < h->slice_context_count; i++)
1909 if (h->thread_context[i]) {
1910 ret = alloc_scratch_buffers(h->thread_context[i], h->linesize);
1911 if (ret < 0)
1912 return ret;
1913 }
1914
1915 /* Some macroblocks can be accessed before they're available in case
1916 * of lost slices, MBAFF or threading. */
1917 memset(h->slice_table, -1,
1918 (h->mb_height * h->mb_stride - 1) * sizeof(*h->slice_table));
1919
1920 // s->decode = (s->flags & CODEC_FLAG_PSNR) || !s->encoding ||
1921 // s->current_picture.f.reference /* || h->contains_intra */ || 1;
1922
1923 /* We mark the current picture as non-reference after allocating it, so
1924 * that if we break out due to an error it can be released automatically
1925 * in the next ff_MPV_frame_start().
1926 */
1927 h->cur_pic_ptr->reference = 0;
1928
1929 h->cur_pic_ptr->field_poc[0] = h->cur_pic_ptr->field_poc[1] = INT_MAX;
1930
1931 h->next_output_pic = NULL;
1932
1933 assert(h->cur_pic_ptr->long_ref == 0);
1934
1935 return 0;
1936 }
1937
1938 /**
1939 * Run setup operations that must be run after slice header decoding.
1940 * This includes finding the next displayed frame.
1941 *
1942 * @param h h264 master context
1943 * @param setup_finished enough NALs have been read that we can call
1944 * ff_thread_finish_setup()
1945 */
1946 static void decode_postinit(H264Context *h, int setup_finished)
1947 {
1948 Picture *out = h->cur_pic_ptr;
1949 Picture *cur = h->cur_pic_ptr;
1950 int i, pics, out_of_order, out_idx;
1951 int invalid = 0, cnt = 0;
1952
1953 h->cur_pic_ptr->f.pict_type = h->pict_type;
1954
1955 if (h->next_output_pic)
1956 return;
1957
1958 if (cur->field_poc[0] == INT_MAX || cur->field_poc[1] == INT_MAX) {
1959 /* FIXME: if we have two PAFF fields in one packet, we can't start
1960 * the next thread here. If we have one field per packet, we can.
1961 * The check in decode_nal_units() is not good enough to find this
1962 * yet, so we assume the worst for now. */
1963 // if (setup_finished)
1964 // ff_thread_finish_setup(h->avctx);
1965 return;
1966 }
1967
1968 cur->f.interlaced_frame = 0;
1969 cur->f.repeat_pict = 0;
1970
1971 /* Signal interlacing information externally. */
1972 /* Prioritize picture timing SEI information over used
1973 * decoding process if it exists. */
1974
1975 if (h->sps.pic_struct_present_flag) {
1976 switch (h->sei_pic_struct) {
1977 case SEI_PIC_STRUCT_FRAME:
1978 break;
1979 case SEI_PIC_STRUCT_TOP_FIELD:
1980 case SEI_PIC_STRUCT_BOTTOM_FIELD:
1981 cur->f.interlaced_frame = 1;
1982 break;
1983 case SEI_PIC_STRUCT_TOP_BOTTOM:
1984 case SEI_PIC_STRUCT_BOTTOM_TOP:
1985 if (FIELD_OR_MBAFF_PICTURE(h))
1986 cur->f.interlaced_frame = 1;
1987 else
1988 // try to flag soft telecine progressive
1989 cur->f.interlaced_frame = h->prev_interlaced_frame;
1990 break;
1991 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
1992 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
1993 /* Signal the possibility of telecined film externally
1994 * (pic_struct 5,6). From these hints, let the applications
1995 * decide if they apply deinterlacing. */
1996 cur->f.repeat_pict = 1;
1997 break;
1998 case SEI_PIC_STRUCT_FRAME_DOUBLING:
1999 cur->f.repeat_pict = 2;
2000 break;
2001 case SEI_PIC_STRUCT_FRAME_TRIPLING:
2002 cur->f.repeat_pict = 4;
2003 break;
2004 }
2005
2006 if ((h->sei_ct_type & 3) &&
2007 h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
2008 cur->f.interlaced_frame = (h->sei_ct_type & (1 << 1)) != 0;
2009 } else {
2010 /* Derive interlacing flag from used decoding process. */
2011 cur->f.interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
2012 }
2013 h->prev_interlaced_frame = cur->f.interlaced_frame;
2014
2015 if (cur->field_poc[0] != cur->field_poc[1]) {
2016 /* Derive top_field_first from field pocs. */
2017 cur->f.top_field_first = cur->field_poc[0] < cur->field_poc[1];
2018 } else {
2019 if (cur->f.interlaced_frame || h->sps.pic_struct_present_flag) {
2020 /* Use picture timing SEI information. Even if it is a
2021 * information of a past frame, better than nothing. */
2022 if (h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
2023 h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
2024 cur->f.top_field_first = 1;
2025 else
2026 cur->f.top_field_first = 0;
2027 } else {
2028 /* Most likely progressive */
2029 cur->f.top_field_first = 0;
2030 }
2031 }
2032
2033 if (h->sei_frame_packing_present &&
2034 h->frame_packing_arrangement_type >= 0 &&
2035 h->frame_packing_arrangement_type <= 6 &&
2036 h->content_interpretation_type > 0 &&
2037 h->content_interpretation_type < 3) {
2038 AVStereo3D *stereo = av_stereo3d_create_side_data(&cur->f);
2039 if (!stereo)
2040 return;
2041
2042 switch (h->frame_packing_arrangement_type) {
2043 case 0:
2044 stereo->type = AV_STEREO3D_CHECKERBOARD;
2045 break;
2046 case 1:
2047 stereo->type = AV_STEREO3D_LINES;
2048 break;
2049 case 2:
2050 stereo->type = AV_STEREO3D_COLUMNS;
2051 break;
2052 case 3:
2053 if (h->quincunx_subsampling)
2054 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2055 else
2056 stereo->type = AV_STEREO3D_SIDEBYSIDE;
2057 break;
2058 case 4:
2059 stereo->type = AV_STEREO3D_TOPBOTTOM;
2060 break;
2061 case 5:
2062 stereo->type = AV_STEREO3D_FRAMESEQUENCE;
2063 break;
2064 case 6:
2065 stereo->type = AV_STEREO3D_2D;
2066 break;
2067 }
2068
2069 if (h->content_interpretation_type == 2)
2070 stereo->flags = AV_STEREO3D_FLAG_INVERT;
2071 }
2072
2073 // FIXME do something with unavailable reference frames
2074
2075 /* Sort B-frames into display order */
2076
2077 if (h->sps.bitstream_restriction_flag &&
2078 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
2079 h->avctx->has_b_frames = h->sps.num_reorder_frames;
2080 h->low_delay = 0;
2081 }
2082
2083 if (h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT &&
2084 !h->sps.bitstream_restriction_flag) {
2085 h->avctx->has_b_frames = MAX_DELAYED_PIC_COUNT - 1;
2086 h->low_delay = 0;
2087 }
2088
2089 pics = 0;
2090 while (h->delayed_pic[pics])
2091 pics++;
2092
2093 assert(pics <= MAX_DELAYED_PIC_COUNT);
2094
2095 h->delayed_pic[pics++] = cur;
2096 if (cur->reference == 0)
2097 cur->reference = DELAYED_PIC_REF;
2098
2099 /* Frame reordering. This code takes pictures from coding order and sorts
2100 * them by their incremental POC value into display order. It supports POC
2101 * gaps, MMCO reset codes and random resets.
2102 * A "display group" can start either with a IDR frame (f.key_frame = 1),
2103 * and/or can be closed down with a MMCO reset code. In sequences where
2104 * there is no delay, we can't detect that (since the frame was already
2105 * output to the user), so we also set h->mmco_reset to detect the MMCO
2106 * reset code.
2107 * FIXME: if we detect insufficient delays (as per h->avctx->has_b_frames),
2108 * we increase the delay between input and output. All frames affected by
2109 * the lag (e.g. those that should have been output before another frame
2110 * that we already returned to the user) will be dropped. This is a bug
2111 * that we will fix later. */
2112 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++) {
2113 cnt += out->poc < h->last_pocs[i];
2114 invalid += out->poc == INT_MIN;
2115 }
2116 if (!h->mmco_reset && !cur->f.key_frame &&
2117 cnt + invalid == MAX_DELAYED_PIC_COUNT && cnt > 0) {
2118 h->mmco_reset = 2;
2119 if (pics > 1)
2120 h->delayed_pic[pics - 2]->mmco_reset = 2;
2121 }
2122 if (h->mmco_reset || cur->f.key_frame) {
2123 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
2124 h->last_pocs[i] = INT_MIN;
2125 cnt = 0;
2126 invalid = MAX_DELAYED_PIC_COUNT;
2127 }
2128 out = h->delayed_pic[0];
2129 out_idx = 0;
2130 for (i = 1; i < MAX_DELAYED_PIC_COUNT &&
2131 h->delayed_pic[i] &&
2132 !h->delayed_pic[i - 1]->mmco_reset &&
2133 !h->delayed_pic[i]->f.key_frame;
2134 i++)
2135 if (h->delayed_pic[i]->poc < out->poc) {
2136 out = h->delayed_pic[i];
2137 out_idx = i;
2138 }
2139 if (h->avctx->has_b_frames == 0 &&
2140 (h->delayed_pic[0]->f.key_frame || h->mmco_reset))
2141 h->next_outputed_poc = INT_MIN;
2142 out_of_order = !out->f.key_frame && !h->mmco_reset &&
2143 (out->poc < h->next_outputed_poc);
2144
2145 if (h->sps.bitstream_restriction_flag &&
2146 h->avctx->has_b_frames >= h->sps.num_reorder_frames) {
2147 } else if (out_of_order && pics - 1 == h->avctx->has_b_frames &&
2148 h->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT) {
2149 if (invalid + cnt < MAX_DELAYED_PIC_COUNT) {
2150 h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames, cnt);
2151 }
2152 h->low_delay = 0;
2153 } else if (h->low_delay &&
2154 ((h->next_outputed_poc != INT_MIN &&
2155 out->poc > h->next_outputed_poc + 2) ||
2156 cur->f.pict_type == AV_PICTURE_TYPE_B)) {
2157 h->low_delay = 0;
2158 h->avctx->has_b_frames++;
2159 }
2160
2161 if (pics > h->avctx->has_b_frames) {
2162 out->reference &= ~DELAYED_PIC_REF;
2163 // for frame threading, the owner must be the second field's thread or
2164 // else the first thread can release the picture and reuse it unsafely
2165 for (i = out_idx; h->delayed_pic[i]; i++)
2166 h->delayed_pic[i] = h->delayed_pic[i + 1];
2167 }
2168 memmove(h->last_pocs, &h->last_pocs[1],
2169 sizeof(*h->last_pocs) * (MAX_DELAYED_PIC_COUNT - 1));
2170 h->last_pocs[MAX_DELAYED_PIC_COUNT - 1] = cur->poc;
2171 if (!out_of_order && pics > h->avctx->has_b_frames) {
2172 h->next_output_pic = out;
2173 if (out->mmco_reset) {
2174 if (out_idx > 0) {
2175 h->next_outputed_poc = out->poc;
2176 h->delayed_pic[out_idx - 1]->mmco_reset = out->mmco_reset;
2177 } else {
2178 h->next_outputed_poc = INT_MIN;
2179 }
2180 } else {
2181 if (out_idx == 0 && pics > 1 && h->delayed_pic[0]->f.key_frame) {
2182 h->next_outputed_poc = INT_MIN;
2183 } else {
2184 h->next_outputed_poc = out->poc;
2185 }
2186 }
2187 h->mmco_reset = 0;
2188 } else {
2189 av_log(h->avctx, AV_LOG_DEBUG, "no picture\n");
2190 }
2191
2192 if (h->next_output_pic) {
2193 if (h->next_output_pic->recovered) {
2194 // We have reached an recovery point and all frames after it in
2195 // display order are "recovered".
2196 h->frame_recovered |= FRAME_RECOVERED_SEI;
2197 }
2198 h->next_output_pic->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_SEI);
2199 }
2200
2201 if (setup_finished && !h->avctx->hwaccel)
2202 ff_thread_finish_setup(h->avctx);
2203 }
2204
2205 static av_always_inline void backup_mb_border(H264Context *h, uint8_t *src_y,
2206 uint8_t *src_cb, uint8_t *src_cr,
2207 int linesize, int uvlinesize,
2208 int simple)
2209 {
2210 uint8_t *top_border;
2211 int top_idx = 1;
2212 const int pixel_shift = h->pixel_shift;
2213 int chroma444 = CHROMA444(h);
2214 int chroma422 = CHROMA422(h);
2215
2216 src_y -= linesize;
2217 src_cb -= uvlinesize;
2218 src_cr -= uvlinesize;
2219
2220 if (!simple && FRAME_MBAFF(h)) {
2221 if (h->mb_y & 1) {
2222 if (!MB_MBAFF(h)) {
2223 top_border = h->top_borders[0][h->mb_x];
2224 AV_COPY128(top_border, src_y + 15 * linesize);
2225 if (pixel_shift)
2226 AV_COPY128(top_border + 16, src_y + 15 * linesize + 16);
2227 if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
2228 if (chroma444) {
2229 if (pixel_shift) {
2230 AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
2231 AV_COPY128(top_border + 48, src_cb + 15 * uvlinesize + 16);
2232 AV_COPY128(top_border + 64, src_cr + 15 * uvlinesize);
2233 AV_COPY128(top_border + 80, src_cr + 15 * uvlinesize + 16);
2234 } else {
2235 AV_COPY128(top_border + 16, src_cb + 15 * uvlinesize);
2236 AV_COPY128(top_border + 32, src_cr + 15 * uvlinesize);
2237 }
2238 } else if (chroma422) {
2239 if (pixel_shift) {
2240 AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
2241 AV_COPY128(top_border + 48, src_cr + 15 * uvlinesize);
2242 } else {
2243 AV_COPY64(top_border + 16, src_cb + 15 * uvlinesize);
2244 AV_COPY64(top_border + 24, src_cr + 15 * uvlinesize);
2245 }
2246 } else {
2247 if (pixel_shift) {
2248 AV_COPY128(top_border + 32, src_cb + 7 * uvlinesize);
2249 AV_COPY128(top_border + 48, src_cr + 7 * uvlinesize);
2250 } else {
2251 AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize);
2252 AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize);
2253 }
2254 }
2255 }
2256 }
2257 } else if (MB_MBAFF(h)) {
2258 top_idx = 0;
2259 } else
2260 return;
2261 }
2262
2263 top_border = h->top_borders[top_idx][h->mb_x];
2264 /* There are two lines saved, the line above the top macroblock
2265 * of a pair, and the line above the bottom macroblock. */
2266 AV_COPY128(top_border, src_y + 16 * linesize);
2267 if (pixel_shift)
2268 AV_COPY128(top_border + 16, src_y + 16 * linesize + 16);
2269
2270 if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
2271 if (chroma444) {
2272 if (pixel_shift) {
2273 AV_COPY128(top_border + 32, src_cb + 16 * linesize);
2274 AV_COPY128(top_border + 48, src_cb + 16 * linesize + 16);
2275 AV_COPY128(top_border + 64, src_cr + 16 * linesize);
2276 AV_COPY128(top_border + 80, src_cr + 16 * linesize + 16);
2277 } else {
2278 AV_COPY128(top_border + 16, src_cb + 16 * linesize);
2279 AV_COPY128(top_border + 32, src_cr + 16 * linesize);
2280 }
2281 } else if (chroma422) {
2282 if (pixel_shift) {
2283 AV_COPY128(top_border + 32, src_cb + 16 * uvlinesize);
2284 AV_COPY128(top_border + 48, src_cr + 16 * uvlinesize);
2285 } else {
2286 AV_COPY64(top_border + 16, src_cb + 16 * uvlinesize);
2287 AV_COPY64(top_border + 24, src_cr + 16 * uvlinesize);
2288 }
2289 } else {
2290 if (pixel_shift) {
2291 AV_COPY128(top_border + 32, src_cb + 8 * uvlinesize);
2292 AV_COPY128(top_border + 48, src_cr + 8 * uvlinesize);
2293 } else {
2294 AV_COPY64(top_border + 16, src_cb + 8 * uvlinesize);
2295 AV_COPY64(top_border + 24, src_cr + 8 * uvlinesize);
2296 }
2297 }
2298 }
2299 }
2300
2301 static av_always_inline void xchg_mb_border(H264Context *h, uint8_t *src_y,
2302 uint8_t *src_cb, uint8_t *src_cr,
2303 int linesize, int uvlinesize,
2304 int xchg, int chroma444,
2305 int simple, int pixel_shift)
2306 {
2307 int deblock_topleft;
2308 int deblock_top;
2309 int top_idx = 1;
2310 uint8_t *top_border_m1;
2311 uint8_t *top_border;
2312
2313 if (!simple && FRAME_MBAFF(h)) {
2314 if (h->mb_y & 1) {
2315 if (!MB_MBAFF(h))
2316 return;
2317 } else {
2318 top_idx = MB_MBAFF(h) ? 0 : 1;
2319 }
2320 }
2321
2322 if (h->deblocking_filter == 2) {
2323 deblock_topleft = h->slice_table[h->mb_xy - 1 - h->mb_stride] == h->slice_num;
2324 deblock_top = h->top_type;
2325 } else {
2326 deblock_topleft = (h->mb_x > 0);
2327 deblock_top = (h->mb_y > !!MB_FIELD(h));
2328 }
2329
2330 src_y -= linesize + 1 + pixel_shift;
2331 src_cb -= uvlinesize + 1 + pixel_shift;
2332 src_cr -= uvlinesize + 1 + pixel_shift;
2333
2334 top_border_m1 = h->top_borders[top_idx][h->mb_x - 1];
2335 top_border = h->top_borders[top_idx][h->mb_x];
2336
2337 #define XCHG(a, b, xchg) \
2338 if (pixel_shift) { \
2339 if (xchg) { \
2340 AV_SWAP64(b + 0, a + 0); \
2341 AV_SWAP64(b + 8, a + 8); \
2342 } else { \
2343 AV_COPY128(b, a); \
2344 } \
2345 } else if (xchg) \
2346 AV_SWAP64(b, a); \
2347 else \
2348 AV_COPY64(b, a);
2349
2350 if (deblock_top) {
2351 if (deblock_topleft) {
2352 XCHG(top_border_m1 + (8 << pixel_shift),
2353 src_y - (7 << pixel_shift), 1);
2354 }
2355 XCHG(top_border + (0 << pixel_shift), src_y + (1 << pixel_shift), xchg);
2356 XCHG(top_border + (8 << pixel_shift), src_y + (9 << pixel_shift), 1);
2357 if (h->mb_x + 1 < h->mb_width) {
2358 XCHG(h->top_borders[top_idx][h->mb_x + 1],
2359 src_y + (17 << pixel_shift), 1);
2360 }
2361 }
2362 if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
2363 if (chroma444) {
2364 if (deblock_topleft) {
2365 XCHG(top_border_m1 + (24 << pixel_shift), src_cb - (7 << pixel_shift), 1);
2366 XCHG(top_border_m1 + (40 << pixel_shift), src_cr - (7 << pixel_shift), 1);
2367 }
2368 XCHG(top_border + (16 << pixel_shift), src_cb + (1 << pixel_shift), xchg);
2369 XCHG(top_border + (24 << pixel_shift), src_cb + (9 << pixel_shift), 1);
2370 XCHG(top_border + (32 << pixel_shift), src_cr + (1 << pixel_shift), xchg);
2371 XCHG(top_border + (40 << pixel_shift), src_cr + (9 << pixel_shift), 1);
2372 if (h->mb_x + 1 < h->mb_width) {
2373 XCHG(h->top_borders[top_idx][h->mb_x + 1] + (16 << pixel_shift), src_cb + (17 << pixel_shift), 1);
2374 XCHG(h->top_borders[top_idx][h->mb_x + 1] + (32 << pixel_shift), src_cr + (17 << pixel_shift), 1);
2375 }
2376 } else {
2377 if (deblock_top) {
2378 if (deblock_topleft) {
2379 XCHG(top_border_m1 + (16 << pixel_shift), src_cb - (7 << pixel_shift), 1);
2380 XCHG(top_border_m1 + (24 << pixel_shift), src_cr - (7 << pixel_shift), 1);
2381 }
2382 XCHG(top_border + (16 << pixel_shift), src_cb + 1 + pixel_shift, 1);
2383 XCHG(top_border + (24 << pixel_shift), src_cr + 1 + pixel_shift, 1);
2384 }
2385 }
2386 }
2387 }
2388
2389 static av_always_inline int dctcoef_get(int16_t *mb, int high_bit_depth,
2390 int index)
2391 {
2392 if (high_bit_depth) {
2393 return AV_RN32A(((int32_t *)mb) + index);
2394 } else
2395 return AV_RN16A(mb + index);
2396 }
2397
2398 static av_always_inline void dctcoef_set(int16_t *mb, int high_bit_depth,
2399 int index, int value)
2400 {
2401 if (high_bit_depth) {
2402 AV_WN32A(((int32_t *)mb) + index, value);
2403 } else
2404 AV_WN16A(mb + index, value);
2405 }
2406
2407 static av_always_inline void hl_decode_mb_predict_luma(H264Context *h,
2408 int mb_type, int is_h264,
2409 int simple,
2410 int transform_bypass,
2411 int pixel_shift,
2412 int *block_offset,
2413 int linesize,
2414 uint8_t *dest_y, int p)
2415 {
2416 void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
2417 void (*idct_dc_add)(uint8_t *dst, int16_t *block, int stride);
2418 int i;
2419 int qscale = p == 0 ? h->qscale : h->chroma_qp[p - 1];
2420 block_offset += 16 * p;
2421 if (IS_INTRA4x4(mb_type)) {
2422 if (IS_8x8DCT(mb_type)) {
2423 if (transform_bypass) {
2424 idct_dc_add =
2425 idct_add = h->h264dsp.h264_add_pixels8_clear;
2426 } else {
2427 idct_dc_add = h->h264dsp.h264_idct8_dc_add;
2428 idct_add = h->h264dsp.h264_idct8_add;
2429 }
2430 for (i = 0; i < 16; i += 4) {
2431 uint8_t *const ptr = dest_y + block_offset[i];
2432 const int dir = h->intra4x4_pred_mode_cache[scan8[i]];
2433 if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {
2434 h->hpc.pred8x8l_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2435 } else {
2436 const int nnz = h->non_zero_count_cache[scan8[i + p * 16]];
2437 h->hpc.pred8x8l[dir](ptr, (h->topleft_samples_available << i) & 0x8000,
2438 (h->topright_samples_available << i) & 0x4000, linesize);
2439 if (nnz) {
2440 if (nnz == 1 && dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
2441 idct_dc_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2442 else
2443 idct_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2444 }
2445 }
2446 }
2447 } else {
2448 if (transform_bypass) {
2449 idct_dc_add =
2450 idct_add = h->h264dsp.h264_add_pixels4_clear;
2451 } else {
2452 idct_dc_add = h->h264dsp.h264_idct_dc_add;
2453 idct_add = h->h264dsp.h264_idct_add;
2454 }
2455 for (i = 0; i < 16; i++) {
2456 uint8_t *const ptr = dest_y + block_offset[i];
2457 const int dir = h->intra4x4_pred_mode_cache[scan8[i]];
2458
2459 if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {
2460 h->hpc.pred4x4_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2461 } else {
2462 uint8_t *topright;
2463 int nnz, tr;
2464 uint64_t tr_high;
2465 if (dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED) {
2466 const int topright_avail = (h->topright_samples_available << i) & 0x8000;
2467 assert(h->mb_y || linesize <= block_offset[i]);
2468 if (!topright_avail) {
2469 if (pixel_shift) {
2470 tr_high = ((uint16_t *)ptr)[3 - linesize / 2] * 0x0001000100010001ULL;
2471 topright = (uint8_t *)&tr_high;
2472 } else {
2473 tr = ptr[3 - linesize] * 0x01010101u;
2474 topright = (uint8_t *)&tr;
2475 }
2476 } else
2477 topright = ptr + (4 << pixel_shift) - linesize;
2478 } else
2479 topright = NULL;
2480
2481 h->hpc.pred4x4[dir](ptr, topright, linesize);
2482 nnz = h->non_zero_count_cache[scan8[i + p * 16]];
2483 if (nnz) {
2484 if (is_h264) {
2485 if (nnz == 1 && dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
2486 idct_dc_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2487 else
2488 idct_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
2489 } else if (CONFIG_SVQ3_DECODER)
2490 ff_svq3_add_idct_c(ptr, h->mb + i * 16 + p * 256, linesize, qscale, 0);
2491 }
2492 }
2493 }
2494 }
2495 } else {
2496 h->hpc.pred16x16[h->intra16x16_pred_mode](dest_y, linesize);
2497 if (is_h264) {
2498 if (h->non_zero_count_cache[scan8[LUMA_DC_BLOCK_INDEX + p]]) {
2499 if (!transform_bypass)
2500 h->h264dsp.h264_luma_dc_dequant_idct(h->mb + (p * 256 << pixel_shift),
2501 h->mb_luma_dc[p],
2502 h->dequant4_coeff[p][qscale][0]);
2503 else {
2504 static const uint8_t dc_mapping[16] = {
2505 0 * 16, 1 * 16, 4 * 16, 5 * 16,
2506 2 * 16, 3 * 16, 6 * 16, 7 * 16,
2507 8 * 16, 9 * 16, 12 * 16, 13 * 16,
2508 10 * 16, 11 * 16, 14 * 16, 15 * 16
2509 };
2510 for (i = 0; i < 16; i++)
2511 dctcoef_set(h->mb + (p * 256 << pixel_shift),
2512 pixel_shift, dc_mapping[i],
2513 dctcoef_get(h->mb_luma_dc[p],
2514 pixel_shift, i));
2515 }
2516 }
2517 } else if (CONFIG_SVQ3_DECODER)
2518 ff_svq3_luma_dc_dequant_idct_c(h->mb + p * 256,
2519 h->mb_luma_dc[p], qscale);
2520 }
2521 }
2522
2523 static av_always_inline void hl_decode_mb_idct_luma(H264Context *h, int mb_type,
2524 int is_h264, int simple,
2525 int transform_bypass,
2526 int pixel_shift,
2527 int *block_offset,
2528 int linesize,
2529 uint8_t *dest_y, int p)
2530 {
2531 void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
2532 int i;
2533 block_offset += 16 * p;
2534 if (!IS_INTRA4x4(mb_type)) {
2535 if (is_h264) {
2536 if (IS_INTRA16x16(mb_type)) {
2537 if (transform_bypass) {
2538 if (h->sps.profile_idc == 244 &&
2539 (h->intra16x16_pred_mode == VERT_PRED8x8 ||
2540 h->intra16x16_pred_mode == HOR_PRED8x8)) {
2541 h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset,
2542 h->mb + (p * 256 << pixel_shift),
2543 linesize);
2544 } else {
2545 for (i = 0; i < 16; i++)
2546 if (h->non_zero_count_cache[scan8[i + p * 16]] ||
2547 dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
2548 h->h264dsp.h264_add_pixels4_clear(dest_y + block_offset[i],
2549 h->mb + (i * 16 + p * 256 << pixel_shift),
2550 linesize);
2551 }
2552 } else {
2553 h->h264dsp.h264_idct_add16intra(dest_y, block_offset,
2554 h->mb + (p * 256 << pixel_shift),
2555 linesize,
2556 h->non_zero_count_cache + p * 5 * 8);
2557 }
2558 } else if (h->cbp & 15) {
2559 if (transform_bypass) {
2560 const int di = IS_8x8DCT(mb_type) ? 4 : 1;
2561 idct_add = IS_8x8DCT(mb_type) ? h->h264dsp.h264_add_pixels8_clear
2562 : h->h264dsp.h264_add_pixels4_clear;
2563 for (i = 0; i < 16; i += di)
2564 if (h->non_zero_count_cache[scan8[i + p * 16]])
2565 idct_add(dest_y + block_offset[i],
2566 h->mb + (i * 16 + p * 256 << pixel_shift),
2567 linesize);
2568 } else {
2569 if (IS_8x8DCT(mb_type))
2570 h->h264dsp.h264_idct8_add4(dest_y, block_offset,
2571 h->mb + (p * 256 << pixel_shift),
2572 linesize,
2573 h->non_zero_count_cache + p * 5 * 8);
2574 else
2575 h->h264dsp.h264_idct_add16(dest_y, block_offset,
2576 h->mb + (p * 256 << pixel_shift),
2577 linesize,
2578 h->non_zero_count_cache + p * 5 * 8);
2579 }
2580 }
2581 } else if (CONFIG_SVQ3_DECODER) {
2582 for (i = 0; i < 16; i++)
2583 if (h->non_zero_count_cache[scan8[i + p * 16]] || h->mb[i * 16 + p * 256]) {
2584 // FIXME benchmark weird rule, & below
2585 uint8_t *const ptr = dest_y + block_offset[i];
2586 ff_svq3_add_idct_c(ptr, h->mb + i * 16 + p * 256, linesize,
2587 h->qscale, IS_INTRA(mb_type) ? 1 : 0);
2588 }
2589 }
2590 }
2591 }
2592
2593 #define BITS 8
2594 #define SIMPLE 1
2595 #include "h264_mb_template.c"
2596
2597 #undef BITS
2598 #define BITS 16
2599 #include "h264_mb_template.c"
2600
2601 #undef SIMPLE
2602 #define SIMPLE 0
2603 #include "h264_mb_template.c"
2604
2605 void ff_h264_hl_decode_mb(H264Context *h)
2606 {
2607 const int mb_xy = h->mb_xy;
2608 const int mb_type = h->cur_pic.mb_type[mb_xy];
2609 int is_complex = CONFIG_SMALL || h->is_complex ||
2610 IS_INTRA_PCM(mb_type) || h->qscale == 0;
2611
2612 if (CHROMA444(h)) {
2613 if (is_complex || h->pixel_shift)
2614 hl_decode_mb_444_complex(h);
2615 else
2616 hl_decode_mb_444_simple_8(h);
2617 } else if (is_complex) {
2618 hl_decode_mb_complex(h);
2619 } else if (h->pixel_shift) {
2620 hl_decode_mb_simple_16(h);
2621 } else
2622 hl_decode_mb_simple_8(h);
2623 }
2624
2625 int ff_pred_weight_table(H264Context *h)
2626 {
2627 int list, i;
2628 int luma_def, chroma_def;
2629
2630 h->use_weight = 0;
2631 h->use_weight_chroma = 0;
2632 h->luma_log2_weight_denom = get_ue_golomb(&h->gb);
2633 if (h->sps.chroma_format_idc)
2634 h->chroma_log2_weight_denom = get_ue_golomb(&h->gb);
2635 luma_def = 1 << h->luma_log2_weight_denom;
2636 chroma_def = 1 << h->chroma_log2_weight_denom;
2637
2638 for (list = 0; list < 2; list++) {
2639 h->luma_weight_flag[list] = 0;
2640 h->chroma_weight_flag[list] = 0;
2641 for (i = 0; i < h->ref_count[list]; i++) {
2642 int luma_weight_flag, chroma_weight_flag;
2643
2644 luma_weight_flag = get_bits1(&h->gb);
2645 if (luma_weight_flag) {
2646 h->luma_weight[i][list][0] = get_se_golomb(&h->gb);
2647 h->luma_weight[i][list][1] = get_se_golomb(&h->gb);
2648 if (h->luma_weight[i][list][0] != luma_def ||
2649 h->luma_weight[i][list][1] != 0) {
2650 h->use_weight = 1;
2651 h->luma_weight_flag[list] = 1;
2652 }
2653 } else {
2654 h->luma_weight[i][list][0] = luma_def;
2655 h->luma_weight[i][list][1] = 0;
2656 }
2657
2658 if (h->sps.chroma_format_idc) {
2659 chroma_weight_flag = get_bits1(&h->gb);
2660 if (chroma_weight_flag) {
2661 int j;
2662 for (j = 0; j < 2; j++) {
2663 h->chroma_weight[i][list][j][0] = get_se_golomb(&h->gb);
2664 h->chroma_weight[i][list][j][1] = get_se_golomb(&h->gb);
2665 if (h->chroma_weight[i][list][j][0] != chroma_def ||
2666 h->chroma_weight[i][list][j][1] != 0) {
2667 h->use_weight_chroma = 1;
2668 h->chroma_weight_flag[list] = 1;
2669 }
2670 }
2671 } else {
2672 int j;
2673 for (j = 0; j < 2; j++) {
2674 h->chroma_weight[i][list][j][0] = chroma_def;
2675 h->chroma_weight[i][list][j][1] = 0;
2676 }
2677 }
2678 }
2679 }
2680 if (h->slice_type_nos != AV_PICTURE_TYPE_B)
2681 break;
2682 }
2683 h->use_weight = h->use_weight || h->use_weight_chroma;
2684 return 0;
2685 }
2686
2687 /**
2688 * Initialize implicit_weight table.
2689 * @param field 0/1 initialize the weight for interlaced MBAFF
2690 * -1 initializes the rest
2691 */
2692 static void implicit_weight_table(H264Context *h, int field)
2693 {
2694 int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
2695
2696 for (i = 0; i < 2; i++) {
2697 h->luma_weight_flag[i] = 0;
2698 h->chroma_weight_flag[i] = 0;
2699 }
2700
2701 if (field < 0) {
2702 if (h->picture_structure == PICT_FRAME) {
2703 cur_poc = h->cur_pic_ptr->poc;
2704 } else {
2705 cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1];
2706 }
2707 if (h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF(h) &&
2708 h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2 * cur_poc) {
2709 h->use_weight = 0;
2710 h->use_weight_chroma = 0;
2711 return;
2712 }
2713 ref_start = 0;
2714 ref_count0 = h->ref_count[0];
2715 ref_count1 = h->ref_count[1];
2716 } else {
2717 cur_poc = h->cur_pic_ptr->field_poc[field];
2718 ref_start = 16;
2719 ref_count0 = 16 + 2 * h->ref_count[0];
2720 ref_count1 = 16 + 2 * h->ref_count[1];
2721 }
2722
2723 h->use_weight = 2;
2724 h->use_weight_chroma = 2;
2725 h->luma_log2_weight_denom = 5;
2726 h->chroma_log2_weight_denom = 5;
2727
2728 for (ref0 = ref_start; ref0 < ref_count0; ref0++) {
2729 int poc0 = h->ref_list[0][ref0].poc;
2730 for (ref1 = ref_start; ref1 < ref_count1; ref1++) {
2731 int w = 32;
2732 if (!h->ref_list[0][ref0].long_ref && !h->ref_list[1][ref1].long_ref) {
2733 int poc1 = h->ref_list[1][ref1].poc;
2734 int td = av_clip(poc1 - poc0, -128, 127);
2735 if (td) {
2736 int tb = av_clip(cur_poc - poc0, -128, 127);
2737 int tx = (16384 + (FFABS(td) >> 1)) / td;
2738 int dist_scale_factor = (tb * tx + 32) >> 8;
2739 if (dist_scale_factor >= -64 && dist_scale_factor <= 128)
2740 w = 64 - dist_scale_factor;
2741 }
2742 }
2743 if (field < 0) {
2744 h->implicit_weight[ref0][ref1][0] =
2745 h->implicit_weight[ref0][ref1][1] = w;
2746 } else {
2747 h->implicit_weight[ref0][ref1][field] = w;
2748 }
2749 }
2750 }
2751 }
2752
2753 /**
2754 * instantaneous decoder refresh.
2755 */
2756 static void idr(H264Context *h)
2757 {
2758 ff_h264_remove_all_refs(h);
2759 h->prev_frame_num = 0;
2760 h->prev_frame_num_offset = 0;
2761 h->prev_poc_msb =
2762 h->prev_poc_lsb = 0;
2763 }
2764
2765 /* forget old pics after a seek */
2766 static void flush_change(H264Context *h)
2767 {
2768 int i;
2769 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
2770 h->last_pocs[i] = INT_MIN;
2771 h->outputed_poc = h->next_outputed_poc = INT_MIN;
2772 h->prev_interlaced_frame = 1;
2773 idr(h);
2774 if (h->cur_pic_ptr)
2775 h->cur_pic_ptr->reference = 0;
2776 h->first_field = 0;
2777 memset(h->ref_list[0], 0, sizeof(h->ref_list[0]));
2778 memset(h->ref_list[1], 0, sizeof(h->ref_list[1]));
2779 memset(h->default_ref_list[0], 0, sizeof(h->default_ref_list[0]));
2780 memset(h->default_ref_list[1], 0, sizeof(h->default_ref_list[1]));
2781 ff_h264_reset_sei(h);
2782 h->recovery_frame = -1;
2783 h->frame_recovered = 0;
2784 }
2785
2786 /* forget old pics after a seek */
2787 static void flush_dpb(AVCodecContext *avctx)
2788 {
2789 H264Context *h = avctx->priv_data;
2790 int i;
2791
2792 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++) {
2793 if (h->delayed_pic[i])
2794 h->delayed_pic[i]->reference = 0;
2795 h->delayed_pic[i] = NULL;
2796 }
2797
2798 flush_change(h);
2799
2800 if (h->DPB)
2801 for (i = 0; i < MAX_PICTURE_COUNT; i++)
2802 unref_picture(h, &h->DPB[i]);
2803 h->cur_pic_ptr = NULL;
2804 unref_picture(h, &h->cur_pic);
2805
2806 h->mb_x = h->mb_y = 0;
2807
2808 h->parse_context.state = -1;
2809 h->parse_context.frame_start_found = 0;
2810 h->parse_context.overread = 0;
2811 h->parse_context.overread_index = 0;
2812 h->parse_context.index = 0;
2813 h->parse_context.last_index = 0;
2814
2815 free_tables(h, 1);
2816 h->context_initialized = 0;
2817 }
2818
2819 int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc)