2 * H.26L/H.264/AVC/JVT/14496-10/... decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * H.264 / AVC / MPEG4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
28 #include "libavutil/avassert.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/timer.h"
33 #include "cabac_functions.h"
34 #include "error_resilience.h"
38 #include "h264chroma.h"
39 #include "h264_mvpred.h"
42 #include "mpegutils.h"
43 #include "rectangle.h"
47 static const uint8_t rem6[QP_MAX_NUM + 1] = {
48 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2,
49 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
50 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2,
51 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5,
55 static const uint8_t div6[QP_MAX_NUM + 1] = {
56 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3,
57 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6,
58 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10,
59 10,10,10,11,11,11,11,11,11,12,12,12,12,12,12,13,13,13, 13, 13, 13,
63 static const uint8_t field_scan[16+1] = {
64 0 + 0 * 4, 0 + 1 * 4, 1 + 0 * 4, 0 + 2 * 4,
65 0 + 3 * 4, 1 + 1 * 4, 1 + 2 * 4, 1 + 3 * 4,
66 2 + 0 * 4, 2 + 1 * 4, 2 + 2 * 4, 2 + 3 * 4,
67 3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4, 3 + 3 * 4,
70 static const uint8_t field_scan8x8[64+1] = {
71 0 + 0 * 8, 0 + 1 * 8, 0 + 2 * 8, 1 + 0 * 8,
72 1 + 1 * 8, 0 + 3 * 8, 0 + 4 * 8, 1 + 2 * 8,
73 2 + 0 * 8, 1 + 3 * 8, 0 + 5 * 8, 0 + 6 * 8,
74 0 + 7 * 8, 1 + 4 * 8, 2 + 1 * 8, 3 + 0 * 8,
75 2 + 2 * 8, 1 + 5 * 8, 1 + 6 * 8, 1 + 7 * 8,
76 2 + 3 * 8, 3 + 1 * 8, 4 + 0 * 8, 3 + 2 * 8,
77 2 + 4 * 8, 2 + 5 * 8, 2 + 6 * 8, 2 + 7 * 8,
78 3 + 3 * 8, 4 + 1 * 8, 5 + 0 * 8, 4 + 2 * 8,
79 3 + 4 * 8, 3 + 5 * 8, 3 + 6 * 8, 3 + 7 * 8,
80 4 + 3 * 8, 5 + 1 * 8, 6 + 0 * 8, 5 + 2 * 8,
81 4 + 4 * 8, 4 + 5 * 8, 4 + 6 * 8, 4 + 7 * 8,
82 5 + 3 * 8, 6 + 1 * 8, 6 + 2 * 8, 5 + 4 * 8,
83 5 + 5 * 8, 5 + 6 * 8, 5 + 7 * 8, 6 + 3 * 8,
84 7 + 0 * 8, 7 + 1 * 8, 6 + 4 * 8, 6 + 5 * 8,
85 6 + 6 * 8, 6 + 7 * 8, 7 + 2 * 8, 7 + 3 * 8,
86 7 + 4 * 8, 7 + 5 * 8, 7 + 6 * 8, 7 + 7 * 8,
89 static const uint8_t field_scan8x8_cavlc[64+1] = {
90 0 + 0 * 8, 1 + 1 * 8, 2 + 0 * 8, 0 + 7 * 8,
91 2 + 2 * 8, 2 + 3 * 8, 2 + 4 * 8, 3 + 3 * 8,
92 3 + 4 * 8, 4 + 3 * 8, 4 + 4 * 8, 5 + 3 * 8,
93 5 + 5 * 8, 7 + 0 * 8, 6 + 6 * 8, 7 + 4 * 8,
94 0 + 1 * 8, 0 + 3 * 8, 1 + 3 * 8, 1 + 4 * 8,
95 1 + 5 * 8, 3 + 1 * 8, 2 + 5 * 8, 4 + 1 * 8,
96 3 + 5 * 8, 5 + 1 * 8, 4 + 5 * 8, 6 + 1 * 8,
97 5 + 6 * 8, 7 + 1 * 8, 6 + 7 * 8, 7 + 5 * 8,
98 0 + 2 * 8, 0 + 4 * 8, 0 + 5 * 8, 2 + 1 * 8,
99 1 + 6 * 8, 4 + 0 * 8, 2 + 6 * 8, 5 + 0 * 8,
100 3 + 6 * 8, 6 + 0 * 8, 4 + 6 * 8, 6 + 2 * 8,
101 5 + 7 * 8, 6 + 4 * 8, 7 + 2 * 8, 7 + 6 * 8,
102 1 + 0 * 8, 1 + 2 * 8, 0 + 6 * 8, 3 + 0 * 8,
103 1 + 7 * 8, 3 + 2 * 8, 2 + 7 * 8, 4 + 2 * 8,
104 3 + 7 * 8, 5 + 2 * 8, 4 + 7 * 8, 5 + 4 * 8,
105 6 + 3 * 8, 6 + 5 * 8, 7 + 3 * 8, 7 + 7 * 8,
108 // zigzag_scan8x8_cavlc[i] = zigzag_scan8x8[(i/4) + 16*(i%4)]
109 static const uint8_t zigzag_scan8x8_cavlc[64+1] = {
110 0 + 0 * 8, 1 + 1 * 8, 1 + 2 * 8, 2 + 2 * 8,
111 4 + 1 * 8, 0 + 5 * 8, 3 + 3 * 8, 7 + 0 * 8,
112 3 + 4 * 8, 1 + 7 * 8, 5 + 3 * 8, 6 + 3 * 8,
113 2 + 7 * 8, 6 + 4 * 8, 5 + 6 * 8, 7 + 5 * 8,
114 1 + 0 * 8, 2 + 0 * 8, 0 + 3 * 8, 3 + 1 * 8,
115 3 + 2 * 8, 0 + 6 * 8, 4 + 2 * 8, 6 + 1 * 8,
116 2 + 5 * 8, 2 + 6 * 8, 6 + 2 * 8, 5 + 4 * 8,
117 3 + 7 * 8, 7 + 3 * 8, 4 + 7 * 8, 7 + 6 * 8,
118 0 + 1 * 8, 3 + 0 * 8, 0 + 4 * 8, 4 + 0 * 8,
119 2 + 3 * 8, 1 + 5 * 8, 5 + 1 * 8, 5 + 2 * 8,
120 1 + 6 * 8, 3 + 5 * 8, 7 + 1 * 8, 4 + 5 * 8,
121 4 + 6 * 8, 7 + 4 * 8, 5 + 7 * 8, 6 + 7 * 8,
122 0 + 2 * 8, 2 + 1 * 8, 1 + 3 * 8, 5 + 0 * 8,
123 1 + 4 * 8, 2 + 4 * 8, 6 + 0 * 8, 4 + 3 * 8,
124 0 + 7 * 8, 4 + 4 * 8, 7 + 2 * 8, 3 + 6 * 8,
125 5 + 5 * 8, 6 + 5 * 8, 6 + 6 * 8, 7 + 7 * 8,
128 static const uint8_t dequant4_coeff_init[6][3] = {
137 static const uint8_t dequant8_coeff_init_scan[16] = {
138 0, 3, 4, 3, 3, 1, 5, 1, 4, 5, 2, 5, 3, 1, 5, 1
141 static const uint8_t dequant8_coeff_init[6][6] = {
142 { 20, 18, 32, 19, 25, 24 },
143 { 22, 19, 35, 21, 28, 26 },
144 { 26, 23, 42, 24, 33, 31 },
145 { 28, 25, 45, 26, 35, 33 },
146 { 32, 28, 51, 30, 40, 38 },
147 { 36, 32, 58, 34, 46, 43 },
150 static const enum AVPixelFormat h264_hwaccel_pixfmt_list_420[] = {
151 #if CONFIG_H264_DXVA2_HWACCEL
152 AV_PIX_FMT_DXVA2_VLD,
154 #if CONFIG_H264_VAAPI_HWACCEL
155 AV_PIX_FMT_VAAPI_VLD,
157 #if CONFIG_H264_VDA_HWACCEL
161 #if CONFIG_H264_VDPAU_HWACCEL
168 static const enum AVPixelFormat h264_hwaccel_pixfmt_list_jpeg_420[] = {
169 #if CONFIG_H264_DXVA2_HWACCEL
170 AV_PIX_FMT_DXVA2_VLD,
172 #if CONFIG_H264_VAAPI_HWACCEL
173 AV_PIX_FMT_VAAPI_VLD,
175 #if CONFIG_H264_VDA_HWACCEL
179 #if CONFIG_H264_VDPAU_HWACCEL
187 static void release_unused_pictures(H264Context *h, int remove_current)
191 /* release non reference frames */
192 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
193 if (h->DPB[i].f.buf[0] && !h->DPB[i].reference &&
194 (remove_current || &h->DPB[i] != h->cur_pic_ptr)) {
195 ff_h264_unref_picture(h, &h->DPB[i]);
200 static int alloc_scratch_buffers(H264Context *h, int linesize)
202 int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
204 if (h->bipred_scratchpad)
207 h->bipred_scratchpad = av_malloc(16 * 6 * alloc_size);
208 // edge emu needs blocksize + filter length - 1
209 // (= 21x21 for h264)
210 h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 21);
212 if (!h->bipred_scratchpad || !h->edge_emu_buffer) {
213 av_freep(&h->bipred_scratchpad);
214 av_freep(&h->edge_emu_buffer);
215 return AVERROR(ENOMEM);
221 static int init_table_pools(H264Context *h)
223 const int big_mb_num = h->mb_stride * (h->mb_height + 1) + 1;
224 const int mb_array_size = h->mb_stride * h->mb_height;
225 const int b4_stride = h->mb_width * 4 + 1;
226 const int b4_array_size = b4_stride * h->mb_height * 4;
228 h->qscale_table_pool = av_buffer_pool_init(big_mb_num + h->mb_stride,
230 h->mb_type_pool = av_buffer_pool_init((big_mb_num + h->mb_stride) *
231 sizeof(uint32_t), av_buffer_allocz);
232 h->motion_val_pool = av_buffer_pool_init(2 * (b4_array_size + 4) *
233 sizeof(int16_t), av_buffer_allocz);
234 h->ref_index_pool = av_buffer_pool_init(4 * mb_array_size, av_buffer_allocz);
236 if (!h->qscale_table_pool || !h->mb_type_pool || !h->motion_val_pool ||
237 !h->ref_index_pool) {
238 av_buffer_pool_uninit(&h->qscale_table_pool);
239 av_buffer_pool_uninit(&h->mb_type_pool);
240 av_buffer_pool_uninit(&h->motion_val_pool);
241 av_buffer_pool_uninit(&h->ref_index_pool);
242 return AVERROR(ENOMEM);
248 static int alloc_picture(H264Context *h, H264Picture *pic)
252 av_assert0(!pic->f.data[0]);
255 ret = ff_thread_get_buffer(h->avctx, &pic->tf, pic->reference ?
256 AV_GET_BUFFER_FLAG_REF : 0);
260 h->linesize = pic->f.linesize[0];
261 h->uvlinesize = pic->f.linesize[1];
262 pic->crop = h->sps.crop;
263 pic->crop_top = h->sps.crop_top;
264 pic->crop_left= h->sps.crop_left;
266 if (h->avctx->hwaccel) {
267 const AVHWAccel *hwaccel = h->avctx->hwaccel;
268 av_assert0(!pic->hwaccel_picture_private);
269 if (hwaccel->frame_priv_data_size) {
270 pic->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
271 if (!pic->hwaccel_priv_buf)
272 return AVERROR(ENOMEM);
273 pic->hwaccel_picture_private = pic->hwaccel_priv_buf->data;
276 if (!h->avctx->hwaccel && CONFIG_GRAY && h->flags & CODEC_FLAG_GRAY && pic->f.data[2]) {
277 int h_chroma_shift, v_chroma_shift;
278 av_pix_fmt_get_chroma_sub_sample(pic->f.format,
279 &h_chroma_shift, &v_chroma_shift);
281 for(i=0; i<FF_CEIL_RSHIFT(h->avctx->height, v_chroma_shift); i++) {
282 memset(pic->f.data[1] + pic->f.linesize[1]*i,
283 0x80, FF_CEIL_RSHIFT(h->avctx->width, h_chroma_shift));
284 memset(pic->f.data[2] + pic->f.linesize[2]*i,
285 0x80, FF_CEIL_RSHIFT(h->avctx->width, h_chroma_shift));
289 if (!h->qscale_table_pool) {
290 ret = init_table_pools(h);
295 pic->qscale_table_buf = av_buffer_pool_get(h->qscale_table_pool);
296 pic->mb_type_buf = av_buffer_pool_get(h->mb_type_pool);
297 if (!pic->qscale_table_buf || !pic->mb_type_buf)
300 pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * h->mb_stride + 1;
301 pic->qscale_table = pic->qscale_table_buf->data + 2 * h->mb_stride + 1;
303 for (i = 0; i < 2; i++) {
304 pic->motion_val_buf[i] = av_buffer_pool_get(h->motion_val_pool);
305 pic->ref_index_buf[i] = av_buffer_pool_get(h->ref_index_pool);
306 if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
309 pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
310 pic->ref_index[i] = pic->ref_index_buf[i]->data;
315 ff_h264_unref_picture(h, pic);
316 return (ret < 0) ? ret : AVERROR(ENOMEM);
319 static inline int pic_is_unused(H264Context *h, H264Picture *pic)
323 if (pic->needs_realloc && !(pic->reference & DELAYED_PIC_REF))
328 static int find_unused_picture(H264Context *h)
332 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
333 if (pic_is_unused(h, &h->DPB[i]))
336 if (i == H264_MAX_PICTURE_COUNT)
337 return AVERROR_INVALIDDATA;
339 if (h->DPB[i].needs_realloc) {
340 h->DPB[i].needs_realloc = 0;
341 ff_h264_unref_picture(h, &h->DPB[i]);
348 static void init_dequant8_coeff_table(H264Context *h)
351 const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
353 for (i = 0; i < 6; i++) {
354 h->dequant8_coeff[i] = h->dequant8_buffer[i];
355 for (j = 0; j < i; j++)
356 if (!memcmp(h->pps.scaling_matrix8[j], h->pps.scaling_matrix8[i],
357 64 * sizeof(uint8_t))) {
358 h->dequant8_coeff[i] = h->dequant8_buffer[j];
364 for (q = 0; q < max_qp + 1; q++) {
367 for (x = 0; x < 64; x++)
368 h->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
369 ((uint32_t)dequant8_coeff_init[idx][dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
370 h->pps.scaling_matrix8[i][x]) << shift;
375 static void init_dequant4_coeff_table(H264Context *h)
378 const int max_qp = 51 + 6 * (h->sps.bit_depth_luma - 8);
379 for (i = 0; i < 6; i++) {
380 h->dequant4_coeff[i] = h->dequant4_buffer[i];
381 for (j = 0; j < i; j++)
382 if (!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i],
383 16 * sizeof(uint8_t))) {
384 h->dequant4_coeff[i] = h->dequant4_buffer[j];
390 for (q = 0; q < max_qp + 1; q++) {
391 int shift = div6[q] + 2;
393 for (x = 0; x < 16; x++)
394 h->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
395 ((uint32_t)dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
396 h->pps.scaling_matrix4[i][x]) << shift;
401 void h264_init_dequant_tables(H264Context *h)
404 init_dequant4_coeff_table(h);
405 memset(h->dequant8_coeff, 0, sizeof(h->dequant8_coeff));
407 if (h->pps.transform_8x8_mode)
408 init_dequant8_coeff_table(h);
409 if (h->sps.transform_bypass) {
410 for (i = 0; i < 6; i++)
411 for (x = 0; x < 16; x++)
412 h->dequant4_coeff[i][0][x] = 1 << 6;
413 if (h->pps.transform_8x8_mode)
414 for (i = 0; i < 6; i++)
415 for (x = 0; x < 64; x++)
416 h->dequant8_coeff[i][0][x] = 1 << 6;
421 * Mimic alloc_tables(), but for every context thread.
423 static void clone_tables(H264Context *dst, H264Context *src, int i)
425 dst->intra4x4_pred_mode = src->intra4x4_pred_mode + i * 8 * 2 * src->mb_stride;
426 dst->non_zero_count = src->non_zero_count;
427 dst->slice_table = src->slice_table;
428 dst->cbp_table = src->cbp_table;
429 dst->mb2b_xy = src->mb2b_xy;
430 dst->mb2br_xy = src->mb2br_xy;
431 dst->chroma_pred_mode_table = src->chroma_pred_mode_table;
432 dst->mvd_table[0] = src->mvd_table[0] + i * 8 * 2 * src->mb_stride;
433 dst->mvd_table[1] = src->mvd_table[1] + i * 8 * 2 * src->mb_stride;
434 dst->direct_table = src->direct_table;
435 dst->list_counts = src->list_counts;
437 dst->cur_pic_ptr = src->cur_pic_ptr;
438 dst->cur_pic = src->cur_pic;
439 dst->bipred_scratchpad = NULL;
440 dst->edge_emu_buffer = NULL;
441 ff_h264_pred_init(&dst->hpc, src->avctx->codec_id, src->sps.bit_depth_luma,
442 src->sps.chroma_format_idc);
445 #define IN_RANGE(a, b, size) (((a) >= (b)) && ((a) < ((b) + (size))))
446 #undef REBASE_PICTURE
447 #define REBASE_PICTURE(pic, new_ctx, old_ctx) \
448 (((pic) && (pic) >= (old_ctx)->DPB && \
449 (pic) < (old_ctx)->DPB + H264_MAX_PICTURE_COUNT) ? \
450 &(new_ctx)->DPB[(pic) - (old_ctx)->DPB] : NULL)
452 static void copy_picture_range(H264Picture **to, H264Picture **from, int count,
453 H264Context *new_base,
454 H264Context *old_base)
458 for (i = 0; i < count; i++) {
459 assert((IN_RANGE(from[i], old_base, sizeof(*old_base)) ||
460 IN_RANGE(from[i], old_base->DPB,
461 sizeof(H264Picture) * H264_MAX_PICTURE_COUNT) ||
463 to[i] = REBASE_PICTURE(from[i], new_base, old_base);
467 static int copy_parameter_set(void **to, void **from, int count, int size)
471 for (i = 0; i < count; i++) {
472 if (to[i] && !from[i]) {
474 } else if (from[i] && !to[i]) {
475 to[i] = av_malloc(size);
477 return AVERROR(ENOMEM);
481 memcpy(to[i], from[i], size);
487 #define copy_fields(to, from, start_field, end_field) \
488 memcpy(&(to)->start_field, &(from)->start_field, \
489 (char *)&(to)->end_field - (char *)&(to)->start_field)
491 static int h264_slice_header_init(H264Context *h, int reinit);
493 int ff_h264_update_thread_context(AVCodecContext *dst,
494 const AVCodecContext *src)
496 H264Context *h = dst->priv_data, *h1 = src->priv_data;
497 int inited = h->context_initialized, err = 0;
498 int context_reinitialized = 0;
505 (h->width != h1->width ||
506 h->height != h1->height ||
507 h->mb_width != h1->mb_width ||
508 h->mb_height != h1->mb_height ||
509 h->sps.bit_depth_luma != h1->sps.bit_depth_luma ||
510 h->sps.chroma_format_idc != h1->sps.chroma_format_idc ||
511 h->sps.colorspace != h1->sps.colorspace)) {
513 /* set bits_per_raw_sample to the previous value. the check for changed
514 * bit depth in h264_set_parameter_from_sps() uses it and sets it to
515 * the current value */
516 h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
518 av_freep(&h->bipred_scratchpad);
520 h->width = h1->width;
521 h->height = h1->height;
522 h->mb_height = h1->mb_height;
523 h->mb_width = h1->mb_width;
524 h->mb_num = h1->mb_num;
525 h->mb_stride = h1->mb_stride;
526 h->b_stride = h1->b_stride;
528 if ((ret = copy_parameter_set((void **)h->sps_buffers,
529 (void **)h1->sps_buffers,
530 MAX_SPS_COUNT, sizeof(SPS))) < 0)
533 if ((ret = copy_parameter_set((void **)h->pps_buffers,
534 (void **)h1->pps_buffers,
535 MAX_PPS_COUNT, sizeof(PPS))) < 0)
539 if ((err = h264_slice_header_init(h, 1)) < 0) {
540 av_log(h->avctx, AV_LOG_ERROR, "h264_slice_header_init() failed\n");
543 context_reinitialized = 1;
546 h264_set_parameter_from_sps(h);
547 //Note we set context_reinitialized which will cause h264_set_parameter_from_sps to be reexecuted
548 h->cur_chroma_format_idc = h1->cur_chroma_format_idc;
551 /* update linesize on resize for h264. The h264 decoder doesn't
552 * necessarily call ff_mpv_frame_start in the new thread */
553 h->linesize = h1->linesize;
554 h->uvlinesize = h1->uvlinesize;
556 /* copy block_offset since frame_start may not be called */
557 memcpy(h->block_offset, h1->block_offset, sizeof(h->block_offset));
560 for (i = 0; i < MAX_SPS_COUNT; i++)
561 av_freep(h->sps_buffers + i);
563 for (i = 0; i < MAX_PPS_COUNT; i++)
564 av_freep(h->pps_buffers + i);
566 av_freep(&h->rbsp_buffer[0]);
567 av_freep(&h->rbsp_buffer[1]);
568 memcpy(h, h1, offsetof(H264Context, intra_pcm_ptr));
569 memcpy(&h->cabac, &h1->cabac,
570 sizeof(H264Context) - offsetof(H264Context, cabac));
571 av_assert0((void*)&h->cabac == &h->mb_padding + 1);
573 memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
574 memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
576 memset(&h->er, 0, sizeof(h->er));
577 memset(&h->mb, 0, sizeof(h->mb));
578 memset(&h->mb_luma_dc, 0, sizeof(h->mb_luma_dc));
579 memset(&h->mb_padding, 0, sizeof(h->mb_padding));
580 memset(&h->cur_pic, 0, sizeof(h->cur_pic));
584 h->qscale_table_pool = NULL;
585 h->mb_type_pool = NULL;
586 h->ref_index_pool = NULL;
587 h->motion_val_pool = NULL;
588 for (i = 0; i < 2; i++) {
589 h->rbsp_buffer[i] = NULL;
590 h->rbsp_buffer_size[i] = 0;
593 if (h1->context_initialized) {
594 h->context_initialized = 0;
596 memset(&h->cur_pic, 0, sizeof(h->cur_pic));
597 av_frame_unref(&h->cur_pic.f);
598 h->cur_pic.tf.f = &h->cur_pic.f;
600 ret = ff_h264_alloc_tables(h);
602 av_log(dst, AV_LOG_ERROR, "Could not allocate memory\n");
605 ret = ff_h264_context_init(h);
607 av_log(dst, AV_LOG_ERROR, "context_init() failed.\n");
612 h->bipred_scratchpad = NULL;
613 h->edge_emu_buffer = NULL;
615 h->thread_context[0] = h;
616 h->context_initialized = h1->context_initialized;
619 h->avctx->coded_height = h1->avctx->coded_height;
620 h->avctx->coded_width = h1->avctx->coded_width;
621 h->avctx->width = h1->avctx->width;
622 h->avctx->height = h1->avctx->height;
623 h->coded_picture_number = h1->coded_picture_number;
624 h->first_field = h1->first_field;
625 h->picture_structure = h1->picture_structure;
626 h->qscale = h1->qscale;
627 h->droppable = h1->droppable;
628 h->low_delay = h1->low_delay;
630 for (i = 0; h->DPB && i < H264_MAX_PICTURE_COUNT; i++) {
631 ff_h264_unref_picture(h, &h->DPB[i]);
632 if (h1->DPB && h1->DPB[i].f.buf[0] &&
633 (ret = ff_h264_ref_picture(h, &h->DPB[i], &h1->DPB[i])) < 0)
637 h->cur_pic_ptr = REBASE_PICTURE(h1->cur_pic_ptr, h, h1);
638 ff_h264_unref_picture(h, &h->cur_pic);
639 if (h1->cur_pic.f.buf[0] && (ret = ff_h264_ref_picture(h, &h->cur_pic, &h1->cur_pic)) < 0)
642 h->workaround_bugs = h1->workaround_bugs;
643 h->low_delay = h1->low_delay;
644 h->droppable = h1->droppable;
646 // extradata/NAL handling
647 h->is_avc = h1->is_avc;
650 if ((ret = copy_parameter_set((void **)h->sps_buffers,
651 (void **)h1->sps_buffers,
652 MAX_SPS_COUNT, sizeof(SPS))) < 0)
655 if ((ret = copy_parameter_set((void **)h->pps_buffers,
656 (void **)h1->pps_buffers,
657 MAX_PPS_COUNT, sizeof(PPS))) < 0)
661 // Dequantization matrices
662 // FIXME these are big - can they be only copied when PPS changes?
663 copy_fields(h, h1, dequant4_buffer, dequant4_coeff);
665 for (i = 0; i < 6; i++)
666 h->dequant4_coeff[i] = h->dequant4_buffer[0] +
667 (h1->dequant4_coeff[i] - h1->dequant4_buffer[0]);
669 for (i = 0; i < 6; i++)
670 h->dequant8_coeff[i] = h->dequant8_buffer[0] +
671 (h1->dequant8_coeff[i] - h1->dequant8_buffer[0]);
673 h->dequant_coeff_pps = h1->dequant_coeff_pps;
676 copy_fields(h, h1, poc_lsb, redundant_pic_count);
679 copy_fields(h, h1, short_ref, cabac_init_idc);
681 copy_picture_range(h->short_ref, h1->short_ref, 32, h, h1);
682 copy_picture_range(h->long_ref, h1->long_ref, 32, h, h1);
683 copy_picture_range(h->delayed_pic, h1->delayed_pic,
684 MAX_DELAYED_PIC_COUNT + 2, h, h1);
686 h->frame_recovered = h1->frame_recovered;
688 if (context_reinitialized)
689 ff_h264_set_parameter_from_sps(h);
695 err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
696 h->prev_poc_msb = h->poc_msb;
697 h->prev_poc_lsb = h->poc_lsb;
699 h->prev_frame_num_offset = h->frame_num_offset;
700 h->prev_frame_num = h->frame_num;
701 h->outputed_poc = h->next_outputed_poc;
703 h->recovery_frame = h1->recovery_frame;
708 static int h264_frame_start(H264Context *h)
712 const int pixel_shift = h->pixel_shift;
714 1<<(h->sps.bit_depth_luma-1),
715 1<<(h->sps.bit_depth_chroma-1),
716 1<<(h->sps.bit_depth_chroma-1),
720 if (!ff_thread_can_start_frame(h->avctx)) {
721 av_log(h->avctx, AV_LOG_ERROR, "Attempt to start a frame outside SETUP state\n");
725 release_unused_pictures(h, 1);
726 h->cur_pic_ptr = NULL;
728 i = find_unused_picture(h);
730 av_log(h->avctx, AV_LOG_ERROR, "no frame buffer available\n");
735 pic->reference = h->droppable ? 0 : h->picture_structure;
736 pic->f.coded_picture_number = h->coded_picture_number++;
737 pic->field_picture = h->picture_structure != PICT_FRAME;
740 * Zero key_frame here; IDR markings per slice in frame or fields are ORed
742 * See decode_nal_units().
744 pic->f.key_frame = 0;
747 pic->invalid_gap = 0;
748 pic->sei_recovery_frame_cnt = h->sei_recovery_frame_cnt;
750 if ((ret = alloc_picture(h, pic)) < 0)
752 if(!h->frame_recovered && !h->avctx->hwaccel &&
753 !(h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU))
754 avpriv_color_frame(&pic->f, c);
756 h->cur_pic_ptr = pic;
757 ff_h264_unref_picture(h, &h->cur_pic);
758 if (CONFIG_ERROR_RESILIENCE) {
759 ff_h264_set_erpic(&h->er.cur_pic, NULL);
762 if ((ret = ff_h264_ref_picture(h, &h->cur_pic, h->cur_pic_ptr)) < 0)
765 if (CONFIG_ERROR_RESILIENCE) {
766 ff_er_frame_start(&h->er);
767 ff_h264_set_erpic(&h->er.last_pic, NULL);
768 ff_h264_set_erpic(&h->er.next_pic, NULL);
771 assert(h->linesize && h->uvlinesize);
773 for (i = 0; i < 16; i++) {
774 h->block_offset[i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * h->linesize * ((scan8[i] - scan8[0]) >> 3);
775 h->block_offset[48 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * h->linesize * ((scan8[i] - scan8[0]) >> 3);
777 for (i = 0; i < 16; i++) {
778 h->block_offset[16 + i] =
779 h->block_offset[32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 4 * h->uvlinesize * ((scan8[i] - scan8[0]) >> 3);
780 h->block_offset[48 + 16 + i] =
781 h->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7) << pixel_shift) + 8 * h->uvlinesize * ((scan8[i] - scan8[0]) >> 3);
784 /* We mark the current picture as non-reference after allocating it, so
785 * that if we break out due to an error it can be released automatically
786 * in the next ff_mpv_frame_start().
788 h->cur_pic_ptr->reference = 0;
790 h->cur_pic_ptr->field_poc[0] = h->cur_pic_ptr->field_poc[1] = INT_MAX;
792 h->next_output_pic = NULL;
794 assert(h->cur_pic_ptr->long_ref == 0);
799 static av_always_inline void backup_mb_border(H264Context *h, uint8_t *src_y,
800 uint8_t *src_cb, uint8_t *src_cr,
801 int linesize, int uvlinesize,
806 const int pixel_shift = h->pixel_shift;
807 int chroma444 = CHROMA444(h);
808 int chroma422 = CHROMA422(h);
811 src_cb -= uvlinesize;
812 src_cr -= uvlinesize;
814 if (!simple && FRAME_MBAFF(h)) {
817 top_border = h->top_borders[0][h->mb_x];
818 AV_COPY128(top_border, src_y + 15 * linesize);
820 AV_COPY128(top_border + 16, src_y + 15 * linesize + 16);
821 if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
824 AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
825 AV_COPY128(top_border + 48, src_cb + 15 * uvlinesize + 16);
826 AV_COPY128(top_border + 64, src_cr + 15 * uvlinesize);
827 AV_COPY128(top_border + 80, src_cr + 15 * uvlinesize + 16);
829 AV_COPY128(top_border + 16, src_cb + 15 * uvlinesize);
830 AV_COPY128(top_border + 32, src_cr + 15 * uvlinesize);
832 } else if (chroma422) {
834 AV_COPY128(top_border + 32, src_cb + 15 * uvlinesize);
835 AV_COPY128(top_border + 48, src_cr + 15 * uvlinesize);
837 AV_COPY64(top_border + 16, src_cb + 15 * uvlinesize);
838 AV_COPY64(top_border + 24, src_cr + 15 * uvlinesize);
842 AV_COPY128(top_border + 32, src_cb + 7 * uvlinesize);
843 AV_COPY128(top_border + 48, src_cr + 7 * uvlinesize);
845 AV_COPY64(top_border + 16, src_cb + 7 * uvlinesize);
846 AV_COPY64(top_border + 24, src_cr + 7 * uvlinesize);
851 } else if (MB_MBAFF(h)) {
857 top_border = h->top_borders[top_idx][h->mb_x];
858 /* There are two lines saved, the line above the top macroblock
859 * of a pair, and the line above the bottom macroblock. */
860 AV_COPY128(top_border, src_y + 16 * linesize);
862 AV_COPY128(top_border + 16, src_y + 16 * linesize + 16);
864 if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
867 AV_COPY128(top_border + 32, src_cb + 16 * linesize);
868 AV_COPY128(top_border + 48, src_cb + 16 * linesize + 16);
869 AV_COPY128(top_border + 64, src_cr + 16 * linesize);
870 AV_COPY128(top_border + 80, src_cr + 16 * linesize + 16);
872 AV_COPY128(top_border + 16, src_cb + 16 * linesize);
873 AV_COPY128(top_border + 32, src_cr + 16 * linesize);
875 } else if (chroma422) {
877 AV_COPY128(top_border + 32, src_cb + 16 * uvlinesize);
878 AV_COPY128(top_border + 48, src_cr + 16 * uvlinesize);
880 AV_COPY64(top_border + 16, src_cb + 16 * uvlinesize);
881 AV_COPY64(top_border + 24, src_cr + 16 * uvlinesize);
885 AV_COPY128(top_border + 32, src_cb + 8 * uvlinesize);
886 AV_COPY128(top_border + 48, src_cr + 8 * uvlinesize);
888 AV_COPY64(top_border + 16, src_cb + 8 * uvlinesize);
889 AV_COPY64(top_border + 24, src_cr + 8 * uvlinesize);
896 * Initialize implicit_weight table.
897 * @param field 0/1 initialize the weight for interlaced MBAFF
898 * -1 initializes the rest
900 static void implicit_weight_table(H264Context *h, int field)
902 int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
904 for (i = 0; i < 2; i++) {
905 h->luma_weight_flag[i] = 0;
906 h->chroma_weight_flag[i] = 0;
910 if (h->picture_structure == PICT_FRAME) {
911 cur_poc = h->cur_pic_ptr->poc;
913 cur_poc = h->cur_pic_ptr->field_poc[h->picture_structure - 1];
915 if (h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF(h) &&
916 h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2 * cur_poc) {
918 h->use_weight_chroma = 0;
922 ref_count0 = h->ref_count[0];
923 ref_count1 = h->ref_count[1];
925 cur_poc = h->cur_pic_ptr->field_poc[field];
927 ref_count0 = 16 + 2 * h->ref_count[0];
928 ref_count1 = 16 + 2 * h->ref_count[1];
932 h->use_weight_chroma = 2;
933 h->luma_log2_weight_denom = 5;
934 h->chroma_log2_weight_denom = 5;
936 for (ref0 = ref_start; ref0 < ref_count0; ref0++) {
937 int poc0 = h->ref_list[0][ref0].poc;
938 for (ref1 = ref_start; ref1 < ref_count1; ref1++) {
940 if (!h->ref_list[0][ref0].long_ref && !h->ref_list[1][ref1].long_ref) {
941 int poc1 = h->ref_list[1][ref1].poc;
942 int td = av_clip(poc1 - poc0, -128, 127);
944 int tb = av_clip(cur_poc - poc0, -128, 127);
945 int tx = (16384 + (FFABS(td) >> 1)) / td;
946 int dist_scale_factor = (tb * tx + 32) >> 8;
947 if (dist_scale_factor >= -64 && dist_scale_factor <= 128)
948 w = 64 - dist_scale_factor;
952 h->implicit_weight[ref0][ref1][0] =
953 h->implicit_weight[ref0][ref1][1] = w;
955 h->implicit_weight[ref0][ref1][field] = w;
962 * initialize scan tables
964 static void init_scan_tables(H264Context *h)
967 for (i = 0; i < 16; i++) {
968 #define TRANSPOSE(x) ((x) >> 2) | (((x) << 2) & 0xF)
969 h->zigzag_scan[i] = TRANSPOSE(zigzag_scan[i]);
970 h->field_scan[i] = TRANSPOSE(field_scan[i]);
973 for (i = 0; i < 64; i++) {
974 #define TRANSPOSE(x) ((x) >> 3) | (((x) & 7) << 3)
975 h->zigzag_scan8x8[i] = TRANSPOSE(ff_zigzag_direct[i]);
976 h->zigzag_scan8x8_cavlc[i] = TRANSPOSE(zigzag_scan8x8_cavlc[i]);
977 h->field_scan8x8[i] = TRANSPOSE(field_scan8x8[i]);
978 h->field_scan8x8_cavlc[i] = TRANSPOSE(field_scan8x8_cavlc[i]);
981 if (h->sps.transform_bypass) { // FIXME same ugly
982 memcpy(h->zigzag_scan_q0 , zigzag_scan , sizeof(h->zigzag_scan_q0 ));
983 memcpy(h->zigzag_scan8x8_q0 , ff_zigzag_direct , sizeof(h->zigzag_scan8x8_q0 ));
984 memcpy(h->zigzag_scan8x8_cavlc_q0 , zigzag_scan8x8_cavlc , sizeof(h->zigzag_scan8x8_cavlc_q0));
985 memcpy(h->field_scan_q0 , field_scan , sizeof(h->field_scan_q0 ));
986 memcpy(h->field_scan8x8_q0 , field_scan8x8 , sizeof(h->field_scan8x8_q0 ));
987 memcpy(h->field_scan8x8_cavlc_q0 , field_scan8x8_cavlc , sizeof(h->field_scan8x8_cavlc_q0 ));
989 memcpy(h->zigzag_scan_q0 , h->zigzag_scan , sizeof(h->zigzag_scan_q0 ));
990 memcpy(h->zigzag_scan8x8_q0 , h->zigzag_scan8x8 , sizeof(h->zigzag_scan8x8_q0 ));
991 memcpy(h->zigzag_scan8x8_cavlc_q0 , h->zigzag_scan8x8_cavlc , sizeof(h->zigzag_scan8x8_cavlc_q0));
992 memcpy(h->field_scan_q0 , h->field_scan , sizeof(h->field_scan_q0 ));
993 memcpy(h->field_scan8x8_q0 , h->field_scan8x8 , sizeof(h->field_scan8x8_q0 ));
994 memcpy(h->field_scan8x8_cavlc_q0 , h->field_scan8x8_cavlc , sizeof(h->field_scan8x8_cavlc_q0 ));
999 * Replicate H264 "master" context to thread contexts.
1001 static int clone_slice(H264Context *dst, H264Context *src)
1003 memcpy(dst->block_offset, src->block_offset, sizeof(dst->block_offset));
1004 dst->cur_pic_ptr = src->cur_pic_ptr;
1005 dst->cur_pic = src->cur_pic;
1006 dst->linesize = src->linesize;
1007 dst->uvlinesize = src->uvlinesize;
1008 dst->first_field = src->first_field;
1010 dst->prev_poc_msb = src->prev_poc_msb;
1011 dst->prev_poc_lsb = src->prev_poc_lsb;
1012 dst->prev_frame_num_offset = src->prev_frame_num_offset;
1013 dst->prev_frame_num = src->prev_frame_num;
1014 dst->short_ref_count = src->short_ref_count;
1016 memcpy(dst->short_ref, src->short_ref, sizeof(dst->short_ref));
1017 memcpy(dst->long_ref, src->long_ref, sizeof(dst->long_ref));
1018 memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
1020 memcpy(dst->dequant4_coeff, src->dequant4_coeff, sizeof(src->dequant4_coeff));
1021 memcpy(dst->dequant8_coeff, src->dequant8_coeff, sizeof(src->dequant8_coeff));
1026 static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
1028 switch (h->sps.bit_depth_luma) {
1031 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1032 return AV_PIX_FMT_GBRP9;
1034 return AV_PIX_FMT_YUV444P9;
1035 } else if (CHROMA422(h))
1036 return AV_PIX_FMT_YUV422P9;
1038 return AV_PIX_FMT_YUV420P9;
1042 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1043 return AV_PIX_FMT_GBRP10;
1045 return AV_PIX_FMT_YUV444P10;
1046 } else if (CHROMA422(h))
1047 return AV_PIX_FMT_YUV422P10;
1049 return AV_PIX_FMT_YUV420P10;
1053 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1054 return AV_PIX_FMT_GBRP12;
1056 return AV_PIX_FMT_YUV444P12;
1057 } else if (CHROMA422(h))
1058 return AV_PIX_FMT_YUV422P12;
1060 return AV_PIX_FMT_YUV420P12;
1064 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1065 return AV_PIX_FMT_GBRP14;
1067 return AV_PIX_FMT_YUV444P14;
1068 } else if (CHROMA422(h))
1069 return AV_PIX_FMT_YUV422P14;
1071 return AV_PIX_FMT_YUV420P14;
1075 if (h->avctx->colorspace == AVCOL_SPC_RGB) {
1076 av_log(h->avctx, AV_LOG_DEBUG, "Detected GBR colorspace.\n");
1077 return AV_PIX_FMT_GBR24P;
1078 } else if (h->avctx->colorspace == AVCOL_SPC_YCGCO) {
1079 av_log(h->avctx, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
1081 return h->avctx->color_range == AVCOL_RANGE_JPEG ? AV_PIX_FMT_YUVJ444P
1082 : AV_PIX_FMT_YUV444P;
1083 } else if (CHROMA422(h)) {
1084 return h->avctx->color_range == AVCOL_RANGE_JPEG ? AV_PIX_FMT_YUVJ422P
1085 : AV_PIX_FMT_YUV422P;
1088 const enum AVPixelFormat * fmt = h->avctx->codec->pix_fmts ?
1089 h->avctx->codec->pix_fmts :
1090 h->avctx->color_range == AVCOL_RANGE_JPEG ?
1091 h264_hwaccel_pixfmt_list_jpeg_420 :
1092 h264_hwaccel_pixfmt_list_420;
1094 for (i=0; fmt[i] != AV_PIX_FMT_NONE; i++)
1095 if (fmt[i] == h->avctx->pix_fmt && !force_callback)
1097 return ff_thread_get_format(h->avctx, fmt);
1101 av_log(h->avctx, AV_LOG_ERROR,
1102 "Unsupported bit depth %d\n", h->sps.bit_depth_luma);
1103 return AVERROR_INVALIDDATA;
1107 /* export coded and cropped frame dimensions to AVCodecContext */
1108 static int init_dimensions(H264Context *h)
1110 int width = h->width - (h->sps.crop_right + h->sps.crop_left);
1111 int height = h->height - (h->sps.crop_top + h->sps.crop_bottom);
1112 int crop_present = h->sps.crop_left || h->sps.crop_top ||
1113 h->sps.crop_right || h->sps.crop_bottom;
1114 av_assert0(h->sps.crop_right + h->sps.crop_left < (unsigned)h->width);
1115 av_assert0(h->sps.crop_top + h->sps.crop_bottom < (unsigned)h->height);
1117 /* handle container cropping */
1118 if (!crop_present &&
1119 FFALIGN(h->avctx->width, 16) == h->width &&
1120 FFALIGN(h->avctx->height, 16) == h->height) {
1121 width = h->avctx->width;
1122 height = h->avctx->height;
1125 if (width <= 0 || height <= 0) {
1126 av_log(h->avctx, AV_LOG_ERROR, "Invalid cropped dimensions: %dx%d.\n",
1128 if (h->avctx->err_recognition & AV_EF_EXPLODE)
1129 return AVERROR_INVALIDDATA;
1131 av_log(h->avctx, AV_LOG_WARNING, "Ignoring cropping information.\n");
1132 h->sps.crop_bottom =
1142 h->avctx->coded_width = h->width;
1143 h->avctx->coded_height = h->height;
1144 h->avctx->width = width;
1145 h->avctx->height = height;
1150 static int h264_slice_header_init(H264Context *h, int reinit)
1152 int nb_slices = (HAVE_THREADS &&
1153 h->avctx->active_thread_type & FF_THREAD_SLICE) ?
1154 h->avctx->thread_count : 1;
1157 ff_set_sar(h->avctx, h->sps.sar);
1158 av_pix_fmt_get_chroma_sub_sample(h->avctx->pix_fmt,
1159 &h->chroma_x_shift, &h->chroma_y_shift);
1161 if (h->sps.timing_info_present_flag) {
1162 int64_t den = h->sps.time_scale;
1163 if (h->x264_build < 44U)
1165 av_reduce(&h->avctx->time_base.num, &h->avctx->time_base.den,
1166 h->sps.num_units_in_tick, den, 1 << 30);
1170 ff_h264_free_tables(h, 0);
1172 h->prev_interlaced_frame = 1;
1174 init_scan_tables(h);
1175 ret = ff_h264_alloc_tables(h);
1177 av_log(h->avctx, AV_LOG_ERROR, "Could not allocate memory\n");
1181 if (nb_slices > H264_MAX_THREADS || (nb_slices > h->mb_height && h->mb_height)) {
1184 max_slices = FFMIN(H264_MAX_THREADS, h->mb_height);
1186 max_slices = H264_MAX_THREADS;
1187 av_log(h->avctx, AV_LOG_WARNING, "too many threads/slices %d,"
1188 " reducing to %d\n", nb_slices, max_slices);
1189 nb_slices = max_slices;
1191 h->slice_context_count = nb_slices;
1193 if (!HAVE_THREADS || !(h->avctx->active_thread_type & FF_THREAD_SLICE)) {
1194 ret = ff_h264_context_init(h);
1196 av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
1200 for (i = 1; i < h->slice_context_count; i++) {
1202 c = h->thread_context[i] = av_mallocz(sizeof(H264Context));
1204 ret = AVERROR(ENOMEM);
1207 c->avctx = h->avctx;
1208 if (CONFIG_ERROR_RESILIENCE) {
1212 c->h264dsp = h->h264dsp;
1213 c->h264qpel = h->h264qpel;
1214 c->h264chroma = h->h264chroma;
1217 c->pixel_shift = h->pixel_shift;
1218 c->cur_chroma_format_idc = h->cur_chroma_format_idc;
1219 c->width = h->width;
1220 c->height = h->height;
1221 c->linesize = h->linesize;
1222 c->uvlinesize = h->uvlinesize;
1223 c->chroma_x_shift = h->chroma_x_shift;
1224 c->chroma_y_shift = h->chroma_y_shift;
1225 c->qscale = h->qscale;
1226 c->droppable = h->droppable;
1227 c->data_partitioning = h->data_partitioning;
1228 c->low_delay = h->low_delay;
1229 c->mb_width = h->mb_width;
1230 c->mb_height = h->mb_height;
1231 c->mb_stride = h->mb_stride;
1232 c->mb_num = h->mb_num;
1233 c->flags = h->flags;
1234 c->workaround_bugs = h->workaround_bugs;
1235 c->pict_type = h->pict_type;
1237 init_scan_tables(c);
1238 clone_tables(c, h, i);
1239 c->context_initialized = 1;
1242 for (i = 0; i < h->slice_context_count; i++)
1243 if ((ret = ff_h264_context_init(h->thread_context[i])) < 0) {
1244 av_log(h->avctx, AV_LOG_ERROR, "context_init() failed.\n");
1249 h->context_initialized = 1;
1253 ff_h264_free_tables(h, 0);
1254 h->context_initialized = 0;
1258 static enum AVPixelFormat non_j_pixfmt(enum AVPixelFormat a)
1261 case AV_PIX_FMT_YUVJ420P: return AV_PIX_FMT_YUV420P;
1262 case AV_PIX_FMT_YUVJ422P: return AV_PIX_FMT_YUV422P;
1263 case AV_PIX_FMT_YUVJ444P: return AV_PIX_FMT_YUV444P;
1270 * Decode a slice header.
1271 * This will (re)intialize the decoder and call h264_frame_start() as needed.
1273 * @param h h264context
1274 * @param h0 h264 master context (differs from 'h' when doing sliced based
1275 * parallel decoding)
1277 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1279 int ff_h264_decode_slice_header(H264Context *h, H264Context *h0)
1281 unsigned int first_mb_in_slice;
1282 unsigned int pps_id;
1284 unsigned int slice_type, tmp, i, j;
1285 int last_pic_structure, last_pic_droppable;
1287 int needs_reinit = 0;
1288 int field_pic_flag, bottom_field_flag;
1290 h->qpel_put = h->h264qpel.put_h264_qpel_pixels_tab;
1291 h->qpel_avg = h->h264qpel.avg_h264_qpel_pixels_tab;
1293 first_mb_in_slice = get_ue_golomb_long(&h->gb);
1295 if (first_mb_in_slice == 0) { // FIXME better field boundary detection
1296 if (h0->current_slice && h->cur_pic_ptr && FIELD_PICTURE(h)) {
1297 ff_h264_field_end(h, 1);
1300 h0->current_slice = 0;
1301 if (!h0->first_field) {
1302 if (h->cur_pic_ptr && !h->droppable) {
1303 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1304 h->picture_structure == PICT_BOTTOM_FIELD);
1306 h->cur_pic_ptr = NULL;
1310 slice_type = get_ue_golomb_31(&h->gb);
1311 if (slice_type > 9) {
1312 av_log(h->avctx, AV_LOG_ERROR,
1313 "slice type %d too large at %d %d\n",
1314 slice_type, h->mb_x, h->mb_y);
1315 return AVERROR_INVALIDDATA;
1317 if (slice_type > 4) {
1319 h->slice_type_fixed = 1;
1321 h->slice_type_fixed = 0;
1323 slice_type = golomb_to_pict_type[slice_type];
1324 h->slice_type = slice_type;
1325 h->slice_type_nos = slice_type & 3;
1327 if (h->nal_unit_type == NAL_IDR_SLICE &&
1328 h->slice_type_nos != AV_PICTURE_TYPE_I) {
1329 av_log(h->avctx, AV_LOG_ERROR, "A non-intra slice in an IDR NAL unit.\n");
1330 return AVERROR_INVALIDDATA;
1334 (h->avctx->skip_frame >= AVDISCARD_NONREF && !h->nal_ref_idc) ||
1335 (h->avctx->skip_frame >= AVDISCARD_BIDIR && h->slice_type_nos == AV_PICTURE_TYPE_B) ||
1336 (h->avctx->skip_frame >= AVDISCARD_NONINTRA && h->slice_type_nos != AV_PICTURE_TYPE_I) ||
1337 (h->avctx->skip_frame >= AVDISCARD_NONKEY && h->nal_unit_type != NAL_IDR_SLICE) ||
1338 h->avctx->skip_frame >= AVDISCARD_ALL) {
1339 return SLICE_SKIPED;
1342 // to make a few old functions happy, it's wrong though
1343 h->pict_type = h->slice_type;
1345 pps_id = get_ue_golomb(&h->gb);
1346 if (pps_id >= MAX_PPS_COUNT) {
1347 av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
1348 return AVERROR_INVALIDDATA;
1350 if (!h0->pps_buffers[pps_id]) {
1351 av_log(h->avctx, AV_LOG_ERROR,
1352 "non-existing PPS %u referenced\n",
1354 return AVERROR_INVALIDDATA;
1356 if (h0->au_pps_id >= 0 && pps_id != h0->au_pps_id) {
1357 av_log(h->avctx, AV_LOG_ERROR,
1358 "PPS change from %d to %d forbidden\n",
1359 h0->au_pps_id, pps_id);
1360 return AVERROR_INVALIDDATA;
1362 h->pps = *h0->pps_buffers[pps_id];
1364 if (!h0->sps_buffers[h->pps.sps_id]) {
1365 av_log(h->avctx, AV_LOG_ERROR,
1366 "non-existing SPS %u referenced\n",
1368 return AVERROR_INVALIDDATA;
1371 if (h->pps.sps_id != h->sps.sps_id ||
1372 h->pps.sps_id != h->current_sps_id ||
1373 h0->sps_buffers[h->pps.sps_id]->new) {
1375 h->sps = *h0->sps_buffers[h->pps.sps_id];
1377 if (h->mb_width != h->sps.mb_width ||
1378 h->mb_height != h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag) ||
1379 h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma ||
1380 h->cur_chroma_format_idc != h->sps.chroma_format_idc
1384 if (h->bit_depth_luma != h->sps.bit_depth_luma ||
1385 h->chroma_format_idc != h->sps.chroma_format_idc) {
1386 h->bit_depth_luma = h->sps.bit_depth_luma;
1387 h->chroma_format_idc = h->sps.chroma_format_idc;
1390 if ((ret = ff_h264_set_parameter_from_sps(h)) < 0)
1394 h->avctx->profile = ff_h264_get_profile(&h->sps);
1395 h->avctx->level = h->sps.level_idc;
1396 h->avctx->refs = h->sps.ref_frame_count;
1398 must_reinit = (h->context_initialized &&
1399 ( 16*h->sps.mb_width != h->avctx->coded_width
1400 || 16*h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag) != h->avctx->coded_height
1401 || h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma
1402 || h->cur_chroma_format_idc != h->sps.chroma_format_idc
1403 || av_cmp_q(h->sps.sar, h->avctx->sample_aspect_ratio)
1404 || h->mb_width != h->sps.mb_width
1405 || h->mb_height != h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag)
1407 if (non_j_pixfmt(h0->avctx->pix_fmt) != non_j_pixfmt(get_pixel_format(h0, 0)))
1410 h->mb_width = h->sps.mb_width;
1411 h->mb_height = h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1412 h->mb_num = h->mb_width * h->mb_height;
1413 h->mb_stride = h->mb_width + 1;
1415 h->b_stride = h->mb_width * 4;
1417 h->chroma_y_shift = h->sps.chroma_format_idc <= 1; // 400 uses yuv420p
1419 h->width = 16 * h->mb_width;
1420 h->height = 16 * h->mb_height;
1422 ret = init_dimensions(h);
1426 if (h->sps.video_signal_type_present_flag) {
1427 h->avctx->color_range = h->sps.full_range>0 ? AVCOL_RANGE_JPEG
1429 if (h->sps.colour_description_present_flag) {
1430 if (h->avctx->colorspace != h->sps.colorspace)
1432 h->avctx->color_primaries = h->sps.color_primaries;
1433 h->avctx->color_trc = h->sps.color_trc;
1434 h->avctx->colorspace = h->sps.colorspace;
1438 if (h->context_initialized &&
1439 (must_reinit || needs_reinit)) {
1441 av_log(h->avctx, AV_LOG_ERROR,
1442 "changing width %d -> %d / height %d -> %d on "
1444 h->width, h->avctx->coded_width,
1445 h->height, h->avctx->coded_height,
1446 h0->current_slice + 1);
1447 return AVERROR_INVALIDDATA;
1450 ff_h264_flush_change(h);
1452 if ((ret = get_pixel_format(h, 1)) < 0)
1454 h->avctx->pix_fmt = ret;
1456 av_log(h->avctx, AV_LOG_INFO, "Reinit context to %dx%d, "
1457 "pix_fmt: %s\n", h->width, h->height, av_get_pix_fmt_name(h->avctx->pix_fmt));
1459 if ((ret = h264_slice_header_init(h, 1)) < 0) {
1460 av_log(h->avctx, AV_LOG_ERROR,
1461 "h264_slice_header_init() failed\n");
1465 if (!h->context_initialized) {
1467 av_log(h->avctx, AV_LOG_ERROR,
1468 "Cannot (re-)initialize context during parallel decoding.\n");
1469 return AVERROR_PATCHWELCOME;
1472 if ((ret = get_pixel_format(h, 1)) < 0)
1474 h->avctx->pix_fmt = ret;
1476 if ((ret = h264_slice_header_init(h, 0)) < 0) {
1477 av_log(h->avctx, AV_LOG_ERROR,
1478 "h264_slice_header_init() failed\n");
1483 if (h == h0 && h->dequant_coeff_pps != pps_id) {
1484 h->dequant_coeff_pps = pps_id;
1485 h264_init_dequant_tables(h);
1488 h->frame_num = get_bits(&h->gb, h->sps.log2_max_frame_num);
1491 h->mb_aff_frame = 0;
1492 last_pic_structure = h0->picture_structure;
1493 last_pic_droppable = h0->droppable;
1494 h->droppable = h->nal_ref_idc == 0;
1495 if (h->sps.frame_mbs_only_flag) {
1496 h->picture_structure = PICT_FRAME;
1498 if (!h->sps.direct_8x8_inference_flag && slice_type == AV_PICTURE_TYPE_B) {
1499 av_log(h->avctx, AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n");
1502 field_pic_flag = get_bits1(&h->gb);
1503 if (field_pic_flag) {
1504 bottom_field_flag = get_bits1(&h->gb);
1505 h->picture_structure = PICT_TOP_FIELD + bottom_field_flag;
1507 h->picture_structure = PICT_FRAME;
1508 h->mb_aff_frame = h->sps.mb_aff;
1511 h->mb_field_decoding_flag = h->picture_structure != PICT_FRAME;
1513 if (h0->current_slice != 0) {
1514 if (last_pic_structure != h->picture_structure ||
1515 last_pic_droppable != h->droppable) {
1516 av_log(h->avctx, AV_LOG_ERROR,
1517 "Changing field mode (%d -> %d) between slices is not allowed\n",
1518 last_pic_structure, h->picture_structure);
1519 h->picture_structure = last_pic_structure;
1520 h->droppable = last_pic_droppable;
1521 return AVERROR_INVALIDDATA;
1522 } else if (!h0->cur_pic_ptr) {
1523 av_log(h->avctx, AV_LOG_ERROR,
1524 "unset cur_pic_ptr on slice %d\n",
1525 h0->current_slice + 1);
1526 return AVERROR_INVALIDDATA;
1529 /* Shorten frame num gaps so we don't have to allocate reference
1530 * frames just to throw them away */
1531 if (h->frame_num != h->prev_frame_num) {
1532 int unwrap_prev_frame_num = h->prev_frame_num;
1533 int max_frame_num = 1 << h->sps.log2_max_frame_num;
1535 if (unwrap_prev_frame_num > h->frame_num)
1536 unwrap_prev_frame_num -= max_frame_num;
1538 if ((h->frame_num - unwrap_prev_frame_num) > h->sps.ref_frame_count) {
1539 unwrap_prev_frame_num = (h->frame_num - h->sps.ref_frame_count) - 1;
1540 if (unwrap_prev_frame_num < 0)
1541 unwrap_prev_frame_num += max_frame_num;
1543 h->prev_frame_num = unwrap_prev_frame_num;
1547 /* See if we have a decoded first field looking for a pair...
1548 * Here, we're using that to see if we should mark previously
1549 * decode frames as "finished".
1550 * We have to do that before the "dummy" in-between frame allocation,
1551 * since that can modify h->cur_pic_ptr. */
1552 if (h0->first_field) {
1553 assert(h0->cur_pic_ptr);
1554 assert(h0->cur_pic_ptr->f.buf[0]);
1555 assert(h0->cur_pic_ptr->reference != DELAYED_PIC_REF);
1557 /* Mark old field/frame as completed */
1558 if (h0->cur_pic_ptr->tf.owner == h0->avctx) {
1559 ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1560 last_pic_structure == PICT_BOTTOM_FIELD);
1563 /* figure out if we have a complementary field pair */
1564 if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1565 /* Previous field is unmatched. Don't display it, but let it
1566 * remain for reference if marked as such. */
1567 if (last_pic_structure != PICT_FRAME) {
1568 ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1569 last_pic_structure == PICT_TOP_FIELD);
1572 if (h0->cur_pic_ptr->frame_num != h->frame_num) {
1573 /* This and previous field were reference, but had
1574 * different frame_nums. Consider this field first in
1575 * pair. Throw away previous field except for reference
1577 if (last_pic_structure != PICT_FRAME) {
1578 ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1579 last_pic_structure == PICT_TOP_FIELD);
1582 /* Second field in complementary pair */
1583 if (!((last_pic_structure == PICT_TOP_FIELD &&
1584 h->picture_structure == PICT_BOTTOM_FIELD) ||
1585 (last_pic_structure == PICT_BOTTOM_FIELD &&
1586 h->picture_structure == PICT_TOP_FIELD))) {
1587 av_log(h->avctx, AV_LOG_ERROR,
1588 "Invalid field mode combination %d/%d\n",
1589 last_pic_structure, h->picture_structure);
1590 h->picture_structure = last_pic_structure;
1591 h->droppable = last_pic_droppable;
1592 return AVERROR_INVALIDDATA;
1593 } else if (last_pic_droppable != h->droppable) {
1594 avpriv_request_sample(h->avctx,
1595 "Found reference and non-reference fields in the same frame, which");
1596 h->picture_structure = last_pic_structure;
1597 h->droppable = last_pic_droppable;
1598 return AVERROR_PATCHWELCOME;
1604 while (h->frame_num != h->prev_frame_num && !h0->first_field &&
1605 h->frame_num != (h->prev_frame_num + 1) % (1 << h->sps.log2_max_frame_num)) {
1606 H264Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
1607 av_log(h->avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n",
1608 h->frame_num, h->prev_frame_num);
1609 if (!h->sps.gaps_in_frame_num_allowed_flag)
1610 for(i=0; i<FF_ARRAY_ELEMS(h->last_pocs); i++)
1611 h->last_pocs[i] = INT_MIN;
1612 ret = h264_frame_start(h);
1614 h0->first_field = 0;
1618 h->prev_frame_num++;
1619 h->prev_frame_num %= 1 << h->sps.log2_max_frame_num;
1620 h->cur_pic_ptr->frame_num = h->prev_frame_num;
1621 h->cur_pic_ptr->invalid_gap = !h->sps.gaps_in_frame_num_allowed_flag;
1622 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 0);
1623 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX, 1);
1624 ret = ff_generate_sliding_window_mmcos(h, 1);
1625 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1627 ret = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1628 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1630 /* Error concealment: If a ref is missing, copy the previous ref
1632 * FIXME: Avoiding a memcpy would be nice, but ref handling makes
1633 * many assumptions about there being no actual duplicates.
1634 * FIXME: This does not copy padding for out-of-frame motion
1635 * vectors. Given we are concealing a lost frame, this probably
1636 * is not noticeable by comparison, but it should be fixed. */
1637 if (h->short_ref_count) {
1639 av_image_copy(h->short_ref[0]->f.data,
1640 h->short_ref[0]->f.linesize,
1641 (const uint8_t **)prev->f.data,
1646 h->short_ref[0]->poc = prev->poc + 2;
1648 h->short_ref[0]->frame_num = h->prev_frame_num;
1652 /* See if we have a decoded first field looking for a pair...
1653 * We're using that to see whether to continue decoding in that
1654 * frame, or to allocate a new one. */
1655 if (h0->first_field) {
1656 assert(h0->cur_pic_ptr);
1657 assert(h0->cur_pic_ptr->f.buf[0]);
1658 assert(h0->cur_pic_ptr->reference != DELAYED_PIC_REF);
1660 /* figure out if we have a complementary field pair */
1661 if (!FIELD_PICTURE(h) || h->picture_structure == last_pic_structure) {
1662 /* Previous field is unmatched. Don't display it, but let it
1663 * remain for reference if marked as such. */
1664 h0->cur_pic_ptr = NULL;
1665 h0->first_field = FIELD_PICTURE(h);
1667 if (h0->cur_pic_ptr->frame_num != h->frame_num) {
1668 ff_thread_report_progress(&h0->cur_pic_ptr->tf, INT_MAX,
1669 h0->picture_structure==PICT_BOTTOM_FIELD);
1670 /* This and the previous field had different frame_nums.
1671 * Consider this field first in pair. Throw away previous
1672 * one except for reference purposes. */
1673 h0->first_field = 1;
1674 h0->cur_pic_ptr = NULL;
1676 /* Second field in complementary pair */
1677 h0->first_field = 0;
1681 /* Frame or first field in a potentially complementary pair */
1682 h0->first_field = FIELD_PICTURE(h);
1685 if (!FIELD_PICTURE(h) || h0->first_field) {
1686 if (h264_frame_start(h) < 0) {
1687 h0->first_field = 0;
1688 return AVERROR_INVALIDDATA;
1691 release_unused_pictures(h, 0);
1693 /* Some macroblocks can be accessed before they're available in case
1694 * of lost slices, MBAFF or threading. */
1695 if (FIELD_PICTURE(h)) {
1696 for(i = (h->picture_structure == PICT_BOTTOM_FIELD); i<h->mb_height; i++)
1697 memset(h->slice_table + i*h->mb_stride, -1, (h->mb_stride - (i+1==h->mb_height)) * sizeof(*h->slice_table));
1699 memset(h->slice_table, -1,
1700 (h->mb_height * h->mb_stride - 1) * sizeof(*h->slice_table));
1702 h0->last_slice_type = -1;
1704 if (h != h0 && (ret = clone_slice(h, h0)) < 0)
1707 /* can't be in alloc_tables because linesize isn't known there.
1708 * FIXME: redo bipred weight to not require extra buffer? */
1709 for (i = 0; i < h->slice_context_count; i++)
1710 if (h->thread_context[i]) {
1711 ret = alloc_scratch_buffers(h->thread_context[i], h->linesize);
1716 h->cur_pic_ptr->frame_num = h->frame_num; // FIXME frame_num cleanup
1718 av_assert1(h->mb_num == h->mb_width * h->mb_height);
1719 if (first_mb_in_slice << FIELD_OR_MBAFF_PICTURE(h) >= h->mb_num ||
1720 first_mb_in_slice >= h->mb_num) {
1721 av_log(h->avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1722 return AVERROR_INVALIDDATA;
1724 h->resync_mb_x = h->mb_x = first_mb_in_slice % h->mb_width;
1725 h->resync_mb_y = h->mb_y = (first_mb_in_slice / h->mb_width) <<
1726 FIELD_OR_MBAFF_PICTURE(h);
1727 if (h->picture_structure == PICT_BOTTOM_FIELD)
1728 h->resync_mb_y = h->mb_y = h->mb_y + 1;
1729 av_assert1(h->mb_y < h->mb_height);
1731 if (h->picture_structure == PICT_FRAME) {
1732 h->curr_pic_num = h->frame_num;
1733 h->max_pic_num = 1 << h->sps.log2_max_frame_num;
1735 h->curr_pic_num = 2 * h->frame_num + 1;
1736 h->max_pic_num = 1 << (h->sps.log2_max_frame_num + 1);
1739 if (h->nal_unit_type == NAL_IDR_SLICE)
1740 get_ue_golomb(&h->gb); /* idr_pic_id */
1742 if (h->sps.poc_type == 0) {
1743 h->poc_lsb = get_bits(&h->gb, h->sps.log2_max_poc_lsb);
1745 if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
1746 h->delta_poc_bottom = get_se_golomb(&h->gb);
1749 if (h->sps.poc_type == 1 && !h->sps.delta_pic_order_always_zero_flag) {
1750 h->delta_poc[0] = get_se_golomb(&h->gb);
1752 if (h->pps.pic_order_present == 1 && h->picture_structure == PICT_FRAME)
1753 h->delta_poc[1] = get_se_golomb(&h->gb);
1756 ff_init_poc(h, h->cur_pic_ptr->field_poc, &h->cur_pic_ptr->poc);
1758 if (h->pps.redundant_pic_cnt_present)
1759 h->redundant_pic_count = get_ue_golomb(&h->gb);
1761 ret = ff_set_ref_count(h);
1765 if (slice_type != AV_PICTURE_TYPE_I &&
1766 (h0->current_slice == 0 ||
1767 slice_type != h0->last_slice_type ||
1768 memcmp(h0->last_ref_count, h0->ref_count, sizeof(h0->ref_count)))) {
1770 ff_h264_fill_default_ref_list(h);
1773 if (h->slice_type_nos != AV_PICTURE_TYPE_I) {
1774 ret = ff_h264_decode_ref_pic_list_reordering(h);
1776 h->ref_count[1] = h->ref_count[0] = 0;
1781 if ((h->pps.weighted_pred && h->slice_type_nos == AV_PICTURE_TYPE_P) ||
1782 (h->pps.weighted_bipred_idc == 1 &&
1783 h->slice_type_nos == AV_PICTURE_TYPE_B))
1784 ff_pred_weight_table(h);
1785 else if (h->pps.weighted_bipred_idc == 2 &&
1786 h->slice_type_nos == AV_PICTURE_TYPE_B) {
1787 implicit_weight_table(h, -1);
1790 for (i = 0; i < 2; i++) {
1791 h->luma_weight_flag[i] = 0;
1792 h->chroma_weight_flag[i] = 0;
1796 // If frame-mt is enabled, only update mmco tables for the first slice
1797 // in a field. Subsequent slices can temporarily clobber h->mmco_index
1798 // or h->mmco, which will cause ref list mix-ups and decoding errors
1799 // further down the line. This may break decoding if the first slice is
1800 // corrupt, thus we only do this if frame-mt is enabled.
1801 if (h->nal_ref_idc) {
1802 ret = ff_h264_decode_ref_pic_marking(h0, &h->gb,
1803 !(h->avctx->active_thread_type & FF_THREAD_FRAME) ||
1804 h0->current_slice == 0);
1805 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1806 return AVERROR_INVALIDDATA;
1809 if (FRAME_MBAFF(h)) {
1810 ff_h264_fill_mbaff_ref_list(h);
1812 if (h->pps.weighted_bipred_idc == 2 && h->slice_type_nos == AV_PICTURE_TYPE_B) {
1813 implicit_weight_table(h, 0);
1814 implicit_weight_table(h, 1);
1818 if (h->slice_type_nos == AV_PICTURE_TYPE_B && !h->direct_spatial_mv_pred)
1819 ff_h264_direct_dist_scale_factor(h);
1820 ff_h264_direct_ref_list_init(h);
1822 if (h->slice_type_nos != AV_PICTURE_TYPE_I && h->pps.cabac) {
1823 tmp = get_ue_golomb_31(&h->gb);
1825 av_log(h->avctx, AV_LOG_ERROR, "cabac_init_idc %u overflow\n", tmp);
1826 return AVERROR_INVALIDDATA;
1828 h->cabac_init_idc = tmp;
1831 h->last_qscale_diff = 0;
1832 tmp = h->pps.init_qp + get_se_golomb(&h->gb);
1833 if (tmp > 51 + 6 * (h->sps.bit_depth_luma - 8)) {
1834 av_log(h->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
1835 return AVERROR_INVALIDDATA;
1838 h->chroma_qp[0] = get_chroma_qp(h, 0, h->qscale);
1839 h->chroma_qp[1] = get_chroma_qp(h, 1, h->qscale);
1840 // FIXME qscale / qp ... stuff
1841 if (h->slice_type == AV_PICTURE_TYPE_SP)
1842 get_bits1(&h->gb); /* sp_for_switch_flag */
1843 if (h->slice_type == AV_PICTURE_TYPE_SP ||
1844 h->slice_type == AV_PICTURE_TYPE_SI)
1845 get_se_golomb(&h->gb); /* slice_qs_delta */
1847 h->deblocking_filter = 1;
1848 h->slice_alpha_c0_offset = 0;
1849 h->slice_beta_offset = 0;
1850 if (h->pps.deblocking_filter_parameters_present) {
1851 tmp = get_ue_golomb_31(&h->gb);
1853 av_log(h->avctx, AV_LOG_ERROR,
1854 "deblocking_filter_idc %u out of range\n", tmp);
1855 return AVERROR_INVALIDDATA;
1857 h->deblocking_filter = tmp;
1858 if (h->deblocking_filter < 2)
1859 h->deblocking_filter ^= 1; // 1<->0
1861 if (h->deblocking_filter) {
1862 h->slice_alpha_c0_offset = get_se_golomb(&h->gb) * 2;
1863 h->slice_beta_offset = get_se_golomb(&h->gb) * 2;
1864 if (h->slice_alpha_c0_offset > 12 ||
1865 h->slice_alpha_c0_offset < -12 ||
1866 h->slice_beta_offset > 12 ||
1867 h->slice_beta_offset < -12) {
1868 av_log(h->avctx, AV_LOG_ERROR,
1869 "deblocking filter parameters %d %d out of range\n",
1870 h->slice_alpha_c0_offset, h->slice_beta_offset);
1871 return AVERROR_INVALIDDATA;
1876 if (h->avctx->skip_loop_filter >= AVDISCARD_ALL ||
1877 (h->avctx->skip_loop_filter >= AVDISCARD_NONKEY &&
1878 h->nal_unit_type != NAL_IDR_SLICE) ||
1879 (h->avctx->skip_loop_filter >= AVDISCARD_NONINTRA &&
1880 h->slice_type_nos != AV_PICTURE_TYPE_I) ||
1881 (h->avctx->skip_loop_filter >= AVDISCARD_BIDIR &&
1882 h->slice_type_nos == AV_PICTURE_TYPE_B) ||
1883 (h->avctx->skip_loop_filter >= AVDISCARD_NONREF &&
1884 h->nal_ref_idc == 0))
1885 h->deblocking_filter = 0;
1887 if (h->deblocking_filter == 1 && h0->max_contexts > 1) {
1888 if (h->avctx->flags2 & CODEC_FLAG2_FAST) {
1889 /* Cheat slightly for speed:
1890 * Do not bother to deblock across slices. */
1891 h->deblocking_filter = 2;
1893 h0->max_contexts = 1;
1894 if (!h0->single_decode_warning) {
1895 av_log(h->avctx, AV_LOG_INFO,
1896 "Cannot parallelize slice decoding with deblocking filter type 1, decoding such frames in sequential order\n"
1897 "To parallelize slice decoding you need video encoded with disable_deblocking_filter_idc set to 2 (deblock only edges that do not cross slices).\n"
1898 "Setting the flags2 libavcodec option to +fast (-flags2 +fast) will disable deblocking across slices and enable parallel slice decoding "
1899 "but will generate non-standard-compliant output.\n");
1900 h0->single_decode_warning = 1;
1903 av_log(h->avctx, AV_LOG_ERROR,
1904 "Deblocking switched inside frame.\n");
1905 return SLICE_SINGLETHREAD;
1910 FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset) -
1912 h->pps.chroma_qp_index_offset[0],
1913 h->pps.chroma_qp_index_offset[1]) +
1914 6 * (h->sps.bit_depth_luma - 8);
1916 h0->last_slice_type = slice_type;
1917 memcpy(h0->last_ref_count, h0->ref_count, sizeof(h0->last_ref_count));
1918 h->slice_num = ++h0->current_slice;
1921 h0->slice_row[(h->slice_num-1)&(MAX_SLICES-1)]= h->resync_mb_y;
1922 if ( h0->slice_row[h->slice_num&(MAX_SLICES-1)] + 3 >= h->resync_mb_y
1923 && h0->slice_row[h->slice_num&(MAX_SLICES-1)] <= h->resync_mb_y
1924 && h->slice_num >= MAX_SLICES) {
1925 //in case of ASO this check needs to be updated depending on how we decide to assign slice numbers in this case
1926 av_log(h->avctx, AV_LOG_WARNING, "Possibly too many slices (%d >= %d), increase MAX_SLICES and recompile if there are artifacts\n", h->slice_num, MAX_SLICES);
1929 for (j = 0; j < 2; j++) {
1931 int *ref2frm = h->ref2frm[h->slice_num & (MAX_SLICES - 1)][j];
1932 for (i = 0; i < 16; i++) {
1934 if (j < h->list_count && i < h->ref_count[j] &&
1935 h->ref_list[j][i].f.buf[0]) {
1937 AVBuffer *buf = h->ref_list[j][i].f.buf[0]->buffer;
1938 for (k = 0; k < h->short_ref_count; k++)
1939 if (h->short_ref[k]->f.buf[0]->buffer == buf) {
1943 for (k = 0; k < h->long_ref_count; k++)
1944 if (h->long_ref[k] && h->long_ref[k]->f.buf[0]->buffer == buf) {
1945 id_list[i] = h->short_ref_count + k;
1953 for (i = 0; i < 16; i++)
1954 ref2frm[i + 2] = 4 * id_list[i] + (h->ref_list[j][i].reference & 3);
1956 ref2frm[18 + 1] = -1;
1957 for (i = 16; i < 48; i++)
1958 ref2frm[i + 4] = 4 * id_list[(i - 16) >> 1] +
1959 (h->ref_list[j][i].reference & 3);
1962 #if CONFIG_ERROR_RESILIENCE
1963 if (h->ref_count[0]) ff_h264_set_erpic(&h->er.last_pic, &h->ref_list[0][0]);
1964 if (h->ref_count[1]) ff_h264_set_erpic(&h->er.next_pic, &h->ref_list[1][0]);
1967 h->er.ref_count = h->ref_count[0];
1968 h0->au_pps_id = pps_id;
1970 h0->sps_buffers[h->pps.sps_id]->new = 0;
1971 h->current_sps_id = h->pps.sps_id;
1973 if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
1974 av_log(h->avctx, AV_LOG_DEBUG,
1975 "slice:%d %s mb:%d %c%s%s pps:%u frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
1977 (h->picture_structure == PICT_FRAME ? "F" : h->picture_structure == PICT_TOP_FIELD ? "T" : "B"),
1979 av_get_picture_type_char(h->slice_type),
1980 h->slice_type_fixed ? " fix" : "",
1981 h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
1982 pps_id, h->frame_num,
1983 h->cur_pic_ptr->field_poc[0],
1984 h->cur_pic_ptr->field_poc[1],
1985 h->ref_count[0], h->ref_count[1],
1987 h->deblocking_filter,
1988 h->slice_alpha_c0_offset, h->slice_beta_offset,
1990 h->use_weight == 1 && h->use_weight_chroma ? "c" : "",
1991 h->slice_type == AV_PICTURE_TYPE_B ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : "");
1997 int ff_h264_get_slice_type(const H264Context *h)
1999 switch (h->slice_type) {
2000 case AV_PICTURE_TYPE_P:
2002 case AV_PICTURE_TYPE_B:
2004 case AV_PICTURE_TYPE_I:
2006 case AV_PICTURE_TYPE_SP:
2008 case AV_PICTURE_TYPE_SI:
2011 return AVERROR_INVALIDDATA;
2015 static av_always_inline void fill_filter_caches_inter(H264Context *h,
2016 int mb_type, int top_xy,
2017 int left_xy[LEFT_MBS],
2019 int left_type[LEFT_MBS],
2020 int mb_xy, int list)
2022 int b_stride = h->b_stride;
2023 int16_t(*mv_dst)[2] = &h->mv_cache[list][scan8[0]];
2024 int8_t *ref_cache = &h->ref_cache[list][scan8[0]];
2025 if (IS_INTER(mb_type) || IS_DIRECT(mb_type)) {
2026 if (USES_LIST(top_type, list)) {
2027 const int b_xy = h->mb2b_xy[top_xy] + 3 * b_stride;
2028 const int b8_xy = 4 * top_xy + 2;
2029 int (*ref2frm)[64] = (void*)(h->ref2frm[h->slice_table[top_xy] & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
2030 AV_COPY128(mv_dst - 1 * 8, h->cur_pic.motion_val[list][b_xy + 0]);
2031 ref_cache[0 - 1 * 8] =
2032 ref_cache[1 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 0]];
2033 ref_cache[2 - 1 * 8] =
2034 ref_cache[3 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 1]];
2036 AV_ZERO128(mv_dst - 1 * 8);
2037 AV_WN32A(&ref_cache[0 - 1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2040 if (!IS_INTERLACED(mb_type ^ left_type[LTOP])) {
2041 if (USES_LIST(left_type[LTOP], list)) {
2042 const int b_xy = h->mb2b_xy[left_xy[LTOP]] + 3;
2043 const int b8_xy = 4 * left_xy[LTOP] + 1;
2044 int (*ref2frm)[64] =(void*)( h->ref2frm[h->slice_table[left_xy[LTOP]] & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
2045 AV_COPY32(mv_dst - 1 + 0, h->cur_pic.motion_val[list][b_xy + b_stride * 0]);
2046 AV_COPY32(mv_dst - 1 + 8, h->cur_pic.motion_val[list][b_xy + b_stride * 1]);
2047 AV_COPY32(mv_dst - 1 + 16, h->cur_pic.motion_val[list][b_xy + b_stride * 2]);
2048 AV_COPY32(mv_dst - 1 + 24, h->cur_pic.motion_val[list][b_xy + b_stride * 3]);
2050 ref_cache[-1 + 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 0]];
2051 ref_cache[-1 + 16] =
2052 ref_cache[-1 + 24] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 2 * 1]];
2054 AV_ZERO32(mv_dst - 1 + 0);
2055 AV_ZERO32(mv_dst - 1 + 8);
2056 AV_ZERO32(mv_dst - 1 + 16);
2057 AV_ZERO32(mv_dst - 1 + 24);
2060 ref_cache[-1 + 16] =
2061 ref_cache[-1 + 24] = LIST_NOT_USED;
2066 if (!USES_LIST(mb_type, list)) {
2067 fill_rectangle(mv_dst, 4, 4, 8, pack16to32(0, 0), 4);
2068 AV_WN32A(&ref_cache[0 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2069 AV_WN32A(&ref_cache[1 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2070 AV_WN32A(&ref_cache[2 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2071 AV_WN32A(&ref_cache[3 * 8], ((LIST_NOT_USED) & 0xFF) * 0x01010101u);
2076 int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
2077 int (*ref2frm)[64] = (void*)(h->ref2frm[h->slice_num & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
2078 uint32_t ref01 = (pack16to32(ref2frm[list][ref[0]], ref2frm[list][ref[1]]) & 0x00FF00FF) * 0x0101;
2079 uint32_t ref23 = (pack16to32(ref2frm[list][ref[2]], ref2frm[list][ref[3]]) & 0x00FF00FF) * 0x0101;
2080 AV_WN32A(&ref_cache[0 * 8], ref01);
2081 AV_WN32A(&ref_cache[1 * 8], ref01);
2082 AV_WN32A(&ref_cache[2 * 8], ref23);
2083 AV_WN32A(&ref_cache[3 * 8], ref23);
2087 int16_t(*mv_src)[2] = &h->cur_pic.motion_val[list][4 * h->mb_x + 4 * h->mb_y * b_stride];
2088 AV_COPY128(mv_dst + 8 * 0, mv_src + 0 * b_stride);
2089 AV_COPY128(mv_dst + 8 * 1, mv_src + 1 * b_stride);
2090 AV_COPY128(mv_dst + 8 * 2, mv_src + 2 * b_stride);
2091 AV_COPY128(mv_dst + 8 * 3, mv_src + 3 * b_stride);
2097 * @return non zero if the loop filter can be skipped
2099 static int fill_filter_caches(H264Context *h, int mb_type)
2101 const int mb_xy = h->mb_xy;
2102 int top_xy, left_xy[LEFT_MBS];
2103 int top_type, left_type[LEFT_MBS];
2107 top_xy = mb_xy - (h->mb_stride << MB_FIELD(h));
2109 /* Wow, what a mess, why didn't they simplify the interlacing & intra
2110 * stuff, I can't imagine that these complex rules are worth it. */
2112 left_xy[LBOT] = left_xy[LTOP] = mb_xy - 1;
2113 if (FRAME_MBAFF(h)) {
2114 const int left_mb_field_flag = IS_INTERLACED(h->cur_pic.mb_type[mb_xy - 1]);
2115 const int curr_mb_field_flag = IS_INTERLACED(mb_type);
2117 if (left_mb_field_flag != curr_mb_field_flag)
2118 left_xy[LTOP] -= h->mb_stride;
2120 if (curr_mb_field_flag)
2121 top_xy += h->mb_stride &
2122 (((h->cur_pic.mb_type[top_xy] >> 7) & 1) - 1);
2123 if (left_mb_field_flag != curr_mb_field_flag)
2124 left_xy[LBOT] += h->mb_stride;
2128 h->top_mb_xy = top_xy;
2129 h->left_mb_xy[LTOP] = left_xy[LTOP];
2130 h->left_mb_xy[LBOT] = left_xy[LBOT];
2132 /* For sufficiently low qp, filtering wouldn't do anything.
2133 * This is a conservative estimate: could also check beta_offset
2134 * and more accurate chroma_qp. */
2135 int qp_thresh = h->qp_thresh; // FIXME strictly we should store qp_thresh for each mb of a slice
2136 int qp = h->cur_pic.qscale_table[mb_xy];
2137 if (qp <= qp_thresh &&
2138 (left_xy[LTOP] < 0 ||
2139 ((qp + h->cur_pic.qscale_table[left_xy[LTOP]] + 1) >> 1) <= qp_thresh) &&
2141 ((qp + h->cur_pic.qscale_table[top_xy] + 1) >> 1) <= qp_thresh)) {
2142 if (!FRAME_MBAFF(h))
2144 if ((left_xy[LTOP] < 0 ||
2145 ((qp + h->cur_pic.qscale_table[left_xy[LBOT]] + 1) >> 1) <= qp_thresh) &&
2146 (top_xy < h->mb_stride ||
2147 ((qp + h->cur_pic.qscale_table[top_xy - h->mb_stride] + 1) >> 1) <= qp_thresh))
2152 top_type = h->cur_pic.mb_type[top_xy];
2153 left_type[LTOP] = h->cur_pic.mb_type[left_xy[LTOP]];
2154 left_type[LBOT] = h->cur_pic.mb_type[left_xy[LBOT]];
2155 if (h->deblocking_filter == 2) {
2156 if (h->slice_table[top_xy] != h->slice_num)
2158 if (h->slice_table[left_xy[LBOT]] != h->slice_num)
2159 left_type[LTOP] = left_type[LBOT] = 0;
2161 if (h->slice_table[top_xy] == 0xFFFF)
2163 if (h->slice_table[left_xy[LBOT]] == 0xFFFF)
2164 left_type[LTOP] = left_type[LBOT] = 0;
2166 h->top_type = top_type;
2167 h->left_type[LTOP] = left_type[LTOP];
2168 h->left_type[LBOT] = left_type[LBOT];
2170 if (IS_INTRA(mb_type))
2173 fill_filter_caches_inter(h, mb_type, top_xy, left_xy,
2174 top_type, left_type, mb_xy, 0);
2175 if (h->list_count == 2)
2176 fill_filter_caches_inter(h, mb_type, top_xy, left_xy,
2177 top_type, left_type, mb_xy, 1);
2179 nnz = h->non_zero_count[mb_xy];
2180 nnz_cache = h->non_zero_count_cache;
2181 AV_COPY32(&nnz_cache[4 + 8 * 1], &nnz[0]);
2182 AV_COPY32(&nnz_cache[4 + 8 * 2], &nnz[4]);
2183 AV_COPY32(&nnz_cache[4 + 8 * 3], &nnz[8]);
2184 AV_COPY32(&nnz_cache[4 + 8 * 4], &nnz[12]);
2185 h->cbp = h->cbp_table[mb_xy];
2188 nnz = h->non_zero_count[top_xy];
2189 AV_COPY32(&nnz_cache[4 + 8 * 0], &nnz[3 * 4]);
2192 if (left_type[LTOP]) {
2193 nnz = h->non_zero_count[left_xy[LTOP]];
2194 nnz_cache[3 + 8 * 1] = nnz[3 + 0 * 4];
2195 nnz_cache[3 + 8 * 2] = nnz[3 + 1 * 4];
2196 nnz_cache[3 + 8 * 3] = nnz[3 + 2 * 4];
2197 nnz_cache[3 + 8 * 4] = nnz[3 + 3 * 4];
2200 /* CAVLC 8x8dct requires NNZ values for residual decoding that differ
2201 * from what the loop filter needs */
2202 if (!CABAC(h) && h->pps.transform_8x8_mode) {
2203 if (IS_8x8DCT(top_type)) {
2204 nnz_cache[4 + 8 * 0] =
2205 nnz_cache[5 + 8 * 0] = (h->cbp_table[top_xy] & 0x4000) >> 12;
2206 nnz_cache[6 + 8 * 0] =
2207 nnz_cache[7 + 8 * 0] = (h->cbp_table[top_xy] & 0x8000) >> 12;
2209 if (IS_8x8DCT(left_type[LTOP])) {
2210 nnz_cache[3 + 8 * 1] =
2211 nnz_cache[3 + 8 * 2] = (h->cbp_table[left_xy[LTOP]] & 0x2000) >> 12; // FIXME check MBAFF
2213 if (IS_8x8DCT(left_type[LBOT])) {
2214 nnz_cache[3 + 8 * 3] =
2215 nnz_cache[3 + 8 * 4] = (h->cbp_table[left_xy[LBOT]] & 0x8000) >> 12; // FIXME check MBAFF
2218 if (IS_8x8DCT(mb_type)) {
2219 nnz_cache[scan8[0]] =
2220 nnz_cache[scan8[1]] =
2221 nnz_cache[scan8[2]] =
2222 nnz_cache[scan8[3]] = (h->cbp & 0x1000) >> 12;
2224 nnz_cache[scan8[0 + 4]] =
2225 nnz_cache[scan8[1 + 4]] =
2226 nnz_cache[scan8[2 + 4]] =
2227 nnz_cache[scan8[3 + 4]] = (h->cbp & 0x2000) >> 12;
2229 nnz_cache[scan8[0 + 8]] =
2230 nnz_cache[scan8[1 + 8]] =
2231 nnz_cache[scan8[2 + 8]] =
2232 nnz_cache[scan8[3 + 8]] = (h->cbp & 0x4000) >> 12;
2234 nnz_cache[scan8[0 + 12]] =
2235 nnz_cache[scan8[1 + 12]] =
2236 nnz_cache[scan8[2 + 12]] =
2237 nnz_cache[scan8[3 + 12]] = (h->cbp & 0x8000) >> 12;
2244 static void loop_filter(H264Context *h, int start_x, int end_x)
2246 uint8_t *dest_y, *dest_cb, *dest_cr;
2247 int linesize, uvlinesize, mb_x, mb_y;
2248 const int end_mb_y = h->mb_y + FRAME_MBAFF(h);
2249 const int old_slice_type = h->slice_type;
2250 const int pixel_shift = h->pixel_shift;
2251 const int block_h = 16 >> h->chroma_y_shift;
2253 if (h->deblocking_filter) {
2254 for (mb_x = start_x; mb_x < end_x; mb_x++)
2255 for (mb_y = end_mb_y - FRAME_MBAFF(h); mb_y <= end_mb_y; mb_y++) {
2257 mb_xy = h->mb_xy = mb_x + mb_y * h->mb_stride;
2258 h->slice_num = h->slice_table[mb_xy];
2259 mb_type = h->cur_pic.mb_type[mb_xy];
2260 h->list_count = h->list_counts[mb_xy];
2264 h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2268 dest_y = h->cur_pic.f.data[0] +
2269 ((mb_x << pixel_shift) + mb_y * h->linesize) * 16;
2270 dest_cb = h->cur_pic.f.data[1] +
2271 (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
2272 mb_y * h->uvlinesize * block_h;
2273 dest_cr = h->cur_pic.f.data[2] +
2274 (mb_x << pixel_shift) * (8 << CHROMA444(h)) +
2275 mb_y * h->uvlinesize * block_h;
2276 // FIXME simplify above
2279 linesize = h->mb_linesize = h->linesize * 2;
2280 uvlinesize = h->mb_uvlinesize = h->uvlinesize * 2;
2281 if (mb_y & 1) { // FIXME move out of this function?
2282 dest_y -= h->linesize * 15;
2283 dest_cb -= h->uvlinesize * (block_h - 1);
2284 dest_cr -= h->uvlinesize * (block_h - 1);
2287 linesize = h->mb_linesize = h->linesize;
2288 uvlinesize = h->mb_uvlinesize = h->uvlinesize;
2290 backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize,
2292 if (fill_filter_caches(h, mb_type))
2294 h->chroma_qp[0] = get_chroma_qp(h, 0, h->cur_pic.qscale_table[mb_xy]);
2295 h->chroma_qp[1] = get_chroma_qp(h, 1, h->cur_pic.qscale_table[mb_xy]);
2297 if (FRAME_MBAFF(h)) {
2298 ff_h264_filter_mb(h, mb_x, mb_y, dest_y, dest_cb, dest_cr,
2299 linesize, uvlinesize);
2301 ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb,
2302 dest_cr, linesize, uvlinesize);
2306 h->slice_type = old_slice_type;
2308 h->mb_y = end_mb_y - FRAME_MBAFF(h);
2309 h->chroma_qp[0] = get_chroma_qp(h, 0, h->qscale);
2310 h->chroma_qp[1] = get_chroma_qp(h, 1, h->qscale);
2313 static void predict_field_decoding_flag(H264Context *h)
2315 const int mb_xy = h->mb_x + h->mb_y * h->mb_stride;
2316 int mb_type = (h->slice_table[mb_xy - 1] == h->slice_num) ?
2317 h->cur_pic.mb_type[mb_xy - 1] :
2318 (h->slice_table[mb_xy - h->mb_stride] == h->slice_num) ?
2319 h->cur_pic.mb_type[mb_xy - h->mb_stride] : 0;
2320 h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2324 * Draw edges and report progress for the last MB row.
2326 static void decode_finish_row(H264Context *h)
2328 int top = 16 * (h->mb_y >> FIELD_PICTURE(h));
2329 int pic_height = 16 * h->mb_height >> FIELD_PICTURE(h);
2330 int height = 16 << FRAME_MBAFF(h);
2331 int deblock_border = (16 + 4) << FRAME_MBAFF(h);
2333 if (h->deblocking_filter) {
2334 if ((top + height) >= pic_height)
2335 height += deblock_border;
2336 top -= deblock_border;
2339 if (top >= pic_height || (top + height) < 0)
2342 height = FFMIN(height, pic_height - top);
2344 height = top + height;
2348 ff_h264_draw_horiz_band(h, top, height);
2350 if (h->droppable || h->er.error_occurred)
2353 ff_thread_report_progress(&h->cur_pic_ptr->tf, top + height - 1,
2354 h->picture_structure == PICT_BOTTOM_FIELD);
2357 static void er_add_slice(H264Context *h, int startx, int starty,
2358 int endx, int endy, int status)
2360 if (CONFIG_ERROR_RESILIENCE) {
2361 ERContext *er = &h->er;
2363 ff_er_add_slice(er, startx, starty, endx, endy, status);
2367 static int decode_slice(struct AVCodecContext *avctx, void *arg)
2369 H264Context *h = *(void **)arg;
2370 int lf_x_start = h->mb_x;
2372 h->mb_skip_run = -1;
2374 av_assert0(h->block_offset[15] == (4 * ((scan8[15] - scan8[0]) & 7) << h->pixel_shift) + 4 * h->linesize * ((scan8[15] - scan8[0]) >> 3));
2376 h->is_complex = FRAME_MBAFF(h) || h->picture_structure != PICT_FRAME ||
2377 avctx->codec_id != AV_CODEC_ID_H264 ||
2378 (CONFIG_GRAY && (h->flags & CODEC_FLAG_GRAY));
2380 if (!(h->avctx->active_thread_type & FF_THREAD_SLICE) && h->picture_structure == PICT_FRAME && h->er.error_status_table) {
2381 const int start_i = av_clip(h->resync_mb_x + h->resync_mb_y * h->mb_width, 0, h->mb_num - 1);
2383 int prev_status = h->er.error_status_table[h->er.mb_index2xy[start_i - 1]];
2384 prev_status &= ~ VP_START;
2385 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END))
2386 h->er.error_occurred = 1;
2392 align_get_bits(&h->gb);
2395 ff_init_cabac_decoder(&h->cabac,
2396 h->gb.buffer + get_bits_count(&h->gb) / 8,
2397 (get_bits_left(&h->gb) + 7) / 8);
2399 ff_h264_init_cabac_states(h);
2403 int ret = ff_h264_decode_mb_cabac(h);
2405 // STOP_TIMER("decode_mb_cabac")
2408 ff_h264_hl_decode_mb(h);
2410 // FIXME optimal? or let mb_decode decode 16x32 ?
2411 if (ret >= 0 && FRAME_MBAFF(h)) {
2414 ret = ff_h264_decode_mb_cabac(h);
2417 ff_h264_hl_decode_mb(h);
2420 eos = get_cabac_terminate(&h->cabac);
2422 if ((h->workaround_bugs & FF_BUG_TRUNCATED) &&
2423 h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2424 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x - 1,
2425 h->mb_y, ER_MB_END);
2426 if (h->mb_x >= lf_x_start)
2427 loop_filter(h, lf_x_start, h->mb_x + 1);
2430 if (h->cabac.bytestream > h->cabac.bytestream_end + 2 )
2431 av_log(h->avctx, AV_LOG_DEBUG, "bytestream overread %"PTRDIFF_SPECIFIER"\n", h->cabac.bytestream_end - h->cabac.bytestream);
2432 if (ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 4) {
2433 av_log(h->avctx, AV_LOG_ERROR,
2434 "error while decoding MB %d %d, bytestream %"PTRDIFF_SPECIFIER"\n",
2436 h->cabac.bytestream_end - h->cabac.bytestream);
2437 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
2438 h->mb_y, ER_MB_ERROR);
2439 return AVERROR_INVALIDDATA;
2442 if (++h->mb_x >= h->mb_width) {
2443 loop_filter(h, lf_x_start, h->mb_x);
2444 h->mb_x = lf_x_start = 0;
2445 decode_finish_row(h);
2447 if (FIELD_OR_MBAFF_PICTURE(h)) {
2449 if (FRAME_MBAFF(h) && h->mb_y < h->mb_height)
2450 predict_field_decoding_flag(h);
2454 if (eos || h->mb_y >= h->mb_height) {
2455 tprintf(h->avctx, "slice end %d %d\n",
2456 get_bits_count(&h->gb), h->gb.size_in_bits);
2457 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x - 1,
2458 h->mb_y, ER_MB_END);
2459 if (h->mb_x > lf_x_start)
2460 loop_filter(h, lf_x_start, h->mb_x);
2466 int ret = ff_h264_decode_mb_cavlc(h);
2469 ff_h264_hl_decode_mb(h);
2471 // FIXME optimal? or let mb_decode decode 16x32 ?
2472 if (ret >= 0 && FRAME_MBAFF(h)) {
2474 ret = ff_h264_decode_mb_cavlc(h);
2477 ff_h264_hl_decode_mb(h);
2482 av_log(h->avctx, AV_LOG_ERROR,
2483 "error while decoding MB %d %d\n", h->mb_x, h->mb_y);
2484 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
2485 h->mb_y, ER_MB_ERROR);
2489 if (++h->mb_x >= h->mb_width) {
2490 loop_filter(h, lf_x_start, h->mb_x);
2491 h->mb_x = lf_x_start = 0;
2492 decode_finish_row(h);
2494 if (FIELD_OR_MBAFF_PICTURE(h)) {
2496 if (FRAME_MBAFF(h) && h->mb_y < h->mb_height)
2497 predict_field_decoding_flag(h);
2499 if (h->mb_y >= h->mb_height) {
2500 tprintf(h->avctx, "slice end %d %d\n",
2501 get_bits_count(&h->gb), h->gb.size_in_bits);
2503 if ( get_bits_left(&h->gb) == 0
2504 || get_bits_left(&h->gb) > 0 && !(h->avctx->err_recognition & AV_EF_AGGRESSIVE)) {
2505 er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
2506 h->mb_x - 1, h->mb_y, ER_MB_END);
2510 er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
2511 h->mb_x, h->mb_y, ER_MB_END);
2513 return AVERROR_INVALIDDATA;
2518 if (get_bits_left(&h->gb) <= 0 && h->mb_skip_run <= 0) {
2519 tprintf(h->avctx, "slice end %d %d\n",
2520 get_bits_count(&h->gb), h->gb.size_in_bits);
2522 if (get_bits_left(&h->gb) == 0) {
2523 er_add_slice(h, h->resync_mb_x, h->resync_mb_y,
2524 h->mb_x - 1, h->mb_y, ER_MB_END);
2525 if (h->mb_x > lf_x_start)
2526 loop_filter(h, lf_x_start, h->mb_x);
2530 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
2531 h->mb_y, ER_MB_ERROR);
2533 return AVERROR_INVALIDDATA;
2541 * Call decode_slice() for each context.
2543 * @param h h264 master context
2544 * @param context_count number of contexts to execute
2546 int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count)
2548 AVCodecContext *const avctx = h->avctx;
2552 av_assert0(h->mb_y < h->mb_height);
2554 if (h->avctx->hwaccel ||
2555 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
2557 if (context_count == 1) {
2558 return decode_slice(avctx, &h);
2560 av_assert0(context_count > 0);
2561 for (i = 1; i < context_count; i++) {
2562 hx = h->thread_context[i];
2563 if (CONFIG_ERROR_RESILIENCE) {
2564 hx->er.error_count = 0;
2566 hx->x264_build = h->x264_build;
2569 avctx->execute(avctx, decode_slice, h->thread_context,
2570 NULL, context_count, sizeof(void *));
2572 /* pull back stuff from slices to master context */
2573 hx = h->thread_context[context_count - 1];
2576 h->droppable = hx->droppable;
2577 h->picture_structure = hx->picture_structure;
2578 if (CONFIG_ERROR_RESILIENCE) {
2579 for (i = 1; i < context_count; i++)
2580 h->er.error_count += h->thread_context[i]->er.error_count;