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vaapi_h264.c
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1 /*
2  * H.264 HW decode acceleration through VA API
3  *
4  * Copyright (C) 2008-2009 Splitted-Desktop Systems
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "h264dec.h"
24 #include "h264_ps.h"
25 #include "hwaccel.h"
26 #include "vaapi_decode.h"
27 
28 /**
29  * @file
30  * This file implements the glue code between FFmpeg's and VA API's
31  * structures for H.264 decoding.
32  */
33 
34 /**
35  * Initialize an empty VA API picture.
36  *
37  * VA API requires a fixed-size reference picture array.
38  */
39 static void init_vaapi_pic(VAPictureH264 *va_pic)
40 {
41  va_pic->picture_id = VA_INVALID_ID;
42  va_pic->flags = VA_PICTURE_H264_INVALID;
43  va_pic->TopFieldOrderCnt = 0;
44  va_pic->BottomFieldOrderCnt = 0;
45 }
46 
47 /**
48  * Translate an FFmpeg Picture into its VA API form.
49  *
50  * @param[out] va_pic A pointer to VA API's own picture struct
51  * @param[in] pic A pointer to the FFmpeg picture struct to convert
52  * @param[in] pic_structure The picture field type (as defined in mpegvideo.h),
53  * supersedes pic's field type if nonzero.
54  */
55 static void fill_vaapi_pic(VAPictureH264 *va_pic,
56  const H264Picture *pic,
57  int pic_structure)
58 {
59  if (pic_structure == 0)
60  pic_structure = pic->reference;
61  pic_structure &= PICT_FRAME; /* PICT_TOP_FIELD|PICT_BOTTOM_FIELD */
62 
63  va_pic->picture_id = ff_vaapi_get_surface_id(pic->f);
64  va_pic->frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num;
65 
66  va_pic->flags = 0;
67  if (pic_structure != PICT_FRAME)
68  va_pic->flags |= (pic_structure & PICT_TOP_FIELD) ? VA_PICTURE_H264_TOP_FIELD : VA_PICTURE_H264_BOTTOM_FIELD;
69  if (pic->reference)
70  va_pic->flags |= pic->long_ref ? VA_PICTURE_H264_LONG_TERM_REFERENCE : VA_PICTURE_H264_SHORT_TERM_REFERENCE;
71 
72  va_pic->TopFieldOrderCnt = 0;
73  if (pic->field_poc[0] != INT_MAX)
74  va_pic->TopFieldOrderCnt = pic->field_poc[0];
75 
76  va_pic->BottomFieldOrderCnt = 0;
77  if (pic->field_poc[1] != INT_MAX)
78  va_pic->BottomFieldOrderCnt = pic->field_poc[1];
79 }
80 
81 /** Decoded Picture Buffer (DPB). */
82 typedef struct DPB {
83  int size; ///< Current number of reference frames in the DPB
84  int max_size; ///< Max number of reference frames. This is FF_ARRAY_ELEMS(VAPictureParameterBufferH264.ReferenceFrames)
85  VAPictureH264 *va_pics; ///< Pointer to VAPictureParameterBufferH264.ReferenceFrames array
86 } DPB;
87 
88 /**
89  * Append picture to the decoded picture buffer, in a VA API form that
90  * merges the second field picture attributes with the first, if
91  * available. The decoded picture buffer's size must be large enough
92  * to receive the new VA API picture object.
93  */
94 static int dpb_add(DPB *dpb, const H264Picture *pic)
95 {
96  int i;
97 
98  if (dpb->size >= dpb->max_size)
99  return -1;
100 
101  for (i = 0; i < dpb->size; i++) {
102  VAPictureH264 * const va_pic = &dpb->va_pics[i];
103  if (va_pic->picture_id == ff_vaapi_get_surface_id(pic->f)) {
104  VAPictureH264 temp_va_pic;
105  fill_vaapi_pic(&temp_va_pic, pic, 0);
106 
107  if ((temp_va_pic.flags ^ va_pic->flags) & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD)) {
108  va_pic->flags |= temp_va_pic.flags & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD);
109  /* Merge second field */
110  if (temp_va_pic.flags & VA_PICTURE_H264_TOP_FIELD) {
111  va_pic->TopFieldOrderCnt = temp_va_pic.TopFieldOrderCnt;
112  } else {
113  va_pic->BottomFieldOrderCnt = temp_va_pic.BottomFieldOrderCnt;
114  }
115  }
116  return 0;
117  }
118  }
119 
120  fill_vaapi_pic(&dpb->va_pics[dpb->size++], pic, 0);
121  return 0;
122 }
123 
124 /** Fill in VA API reference frames array. */
125 static int fill_vaapi_ReferenceFrames(VAPictureParameterBufferH264 *pic_param,
126  const H264Context *h)
127 {
128  DPB dpb;
129  int i;
130 
131  dpb.size = 0;
132  dpb.max_size = FF_ARRAY_ELEMS(pic_param->ReferenceFrames);
133  dpb.va_pics = pic_param->ReferenceFrames;
134  for (i = 0; i < dpb.max_size; i++)
135  init_vaapi_pic(&dpb.va_pics[i]);
136 
137  for (i = 0; i < h->short_ref_count; i++) {
138  const H264Picture *pic = h->short_ref[i];
139  if (pic && pic->reference && dpb_add(&dpb, pic) < 0)
140  return -1;
141  }
142 
143  for (i = 0; i < 16; i++) {
144  const H264Picture *pic = h->long_ref[i];
145  if (pic && pic->reference && dpb_add(&dpb, pic) < 0)
146  return -1;
147  }
148  return 0;
149 }
150 
151 /**
152  * Fill in VA API reference picture lists from the FFmpeg reference
153  * picture list.
154  *
155  * @param[out] RefPicList VA API internal reference picture list
156  * @param[in] ref_list A pointer to the FFmpeg reference list
157  * @param[in] ref_count The number of reference pictures in ref_list
158  */
159 static void fill_vaapi_RefPicList(VAPictureH264 RefPicList[32],
160  const H264Ref *ref_list,
161  unsigned int ref_count)
162 {
163  unsigned int i, n = 0;
164  for (i = 0; i < ref_count; i++)
165  if (ref_list[i].reference)
166  fill_vaapi_pic(&RefPicList[n++], ref_list[i].parent,
167  ref_list[i].reference);
168 
169  for (; n < 32; n++)
170  init_vaapi_pic(&RefPicList[n]);
171 }
172 
173 /**
174  * Fill in prediction weight table.
175  *
176  * VA API requires a plain prediction weight table as it does not infer
177  * any value.
178  *
179  * @param[in] h A pointer to the current H.264 context
180  * @param[in] list The reference frame list index to use
181  * @param[out] luma_weight_flag VA API plain luma weight flag
182  * @param[out] luma_weight VA API plain luma weight table
183  * @param[out] luma_offset VA API plain luma offset table
184  * @param[out] chroma_weight_flag VA API plain chroma weight flag
185  * @param[out] chroma_weight VA API plain chroma weight table
186  * @param[out] chroma_offset VA API plain chroma offset table
187  */
189  int list,
190  unsigned char *luma_weight_flag,
191  short luma_weight[32],
192  short luma_offset[32],
193  unsigned char *chroma_weight_flag,
194  short chroma_weight[32][2],
195  short chroma_offset[32][2])
196 {
197  const H264SliceContext *sl = &h->slice_ctx[0];
198  unsigned int i, j;
199 
200  *luma_weight_flag = sl->pwt.luma_weight_flag[list];
201  *chroma_weight_flag = sl->pwt.chroma_weight_flag[list];
202 
203  for (i = 0; i < sl->ref_count[list]; i++) {
204  /* VA API also wants the inferred (default) values, not
205  only what is available in the bitstream (7.4.3.2). */
206  if (sl->pwt.luma_weight_flag[list]) {
207  luma_weight[i] = sl->pwt.luma_weight[i][list][0];
208  luma_offset[i] = sl->pwt.luma_weight[i][list][1];
209  } else {
210  luma_weight[i] = 1 << sl->pwt.luma_log2_weight_denom;
211  luma_offset[i] = 0;
212  }
213  for (j = 0; j < 2; j++) {
214  if (sl->pwt.chroma_weight_flag[list]) {
215  chroma_weight[i][j] = sl->pwt.chroma_weight[i][list][j][0];
216  chroma_offset[i][j] = sl->pwt.chroma_weight[i][list][j][1];
217  } else {
218  chroma_weight[i][j] = 1 << sl->pwt.chroma_log2_weight_denom;
219  chroma_offset[i][j] = 0;
220  }
221  }
222  }
223 }
224 
225 /** Initialize and start decoding a frame with VA API. */
227  av_unused const uint8_t *buffer,
228  av_unused uint32_t size)
229 {
230  const H264Context *h = avctx->priv_data;
232  const PPS *pps = h->ps.pps;
233  const SPS *sps = h->ps.sps;
234  VAPictureParameterBufferH264 pic_param;
235  VAIQMatrixBufferH264 iq_matrix;
236  int err;
237 
239 
240  pic_param = (VAPictureParameterBufferH264) {
241  .picture_width_in_mbs_minus1 = h->mb_width - 1,
242  .picture_height_in_mbs_minus1 = h->mb_height - 1,
243  .bit_depth_luma_minus8 = sps->bit_depth_luma - 8,
244  .bit_depth_chroma_minus8 = sps->bit_depth_chroma - 8,
245  .num_ref_frames = sps->ref_frame_count,
246  .seq_fields.bits = {
247  .chroma_format_idc = sps->chroma_format_idc,
248  .residual_colour_transform_flag = sps->residual_color_transform_flag,
249  .gaps_in_frame_num_value_allowed_flag = sps->gaps_in_frame_num_allowed_flag,
250  .frame_mbs_only_flag = sps->frame_mbs_only_flag,
251  .mb_adaptive_frame_field_flag = sps->mb_aff,
252  .direct_8x8_inference_flag = sps->direct_8x8_inference_flag,
253  .MinLumaBiPredSize8x8 = sps->level_idc >= 31, /* A.3.3.2 */
254  .log2_max_frame_num_minus4 = sps->log2_max_frame_num - 4,
255  .pic_order_cnt_type = sps->poc_type,
256  .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_poc_lsb - 4,
257  .delta_pic_order_always_zero_flag = sps->delta_pic_order_always_zero_flag,
258  },
259  .num_slice_groups_minus1 = pps->slice_group_count - 1,
260  .slice_group_map_type = pps->mb_slice_group_map_type,
261  .slice_group_change_rate_minus1 = 0, /* FMO is not implemented */
262  .pic_init_qp_minus26 = pps->init_qp - 26,
263  .pic_init_qs_minus26 = pps->init_qs - 26,
264  .chroma_qp_index_offset = pps->chroma_qp_index_offset[0],
265  .second_chroma_qp_index_offset = pps->chroma_qp_index_offset[1],
266  .pic_fields.bits = {
267  .entropy_coding_mode_flag = pps->cabac,
268  .weighted_pred_flag = pps->weighted_pred,
269  .weighted_bipred_idc = pps->weighted_bipred_idc,
270  .transform_8x8_mode_flag = pps->transform_8x8_mode,
271  .field_pic_flag = h->picture_structure != PICT_FRAME,
272  .constrained_intra_pred_flag = pps->constrained_intra_pred,
273  .pic_order_present_flag = pps->pic_order_present,
274  .deblocking_filter_control_present_flag = pps->deblocking_filter_parameters_present,
275  .redundant_pic_cnt_present_flag = pps->redundant_pic_cnt_present,
276  .reference_pic_flag = h->nal_ref_idc != 0,
277  },
278  .frame_num = h->poc.frame_num,
279  };
280 
281  fill_vaapi_pic(&pic_param.CurrPic, h->cur_pic_ptr, h->picture_structure);
282  err = fill_vaapi_ReferenceFrames(&pic_param, h);
283  if (err < 0)
284  goto fail;
285 
286  err = ff_vaapi_decode_make_param_buffer(avctx, pic,
287  VAPictureParameterBufferType,
288  &pic_param, sizeof(pic_param));
289  if (err < 0)
290  goto fail;
291 
292  memcpy(iq_matrix.ScalingList4x4,
293  pps->scaling_matrix4, sizeof(iq_matrix.ScalingList4x4));
294  memcpy(iq_matrix.ScalingList8x8[0],
295  pps->scaling_matrix8[0], sizeof(iq_matrix.ScalingList8x8[0]));
296  memcpy(iq_matrix.ScalingList8x8[1],
297  pps->scaling_matrix8[3], sizeof(iq_matrix.ScalingList8x8[0]));
298 
299  err = ff_vaapi_decode_make_param_buffer(avctx, pic,
300  VAIQMatrixBufferType,
301  &iq_matrix, sizeof(iq_matrix));
302  if (err < 0)
303  goto fail;
304 
305  return 0;
306 
307 fail:
308  ff_vaapi_decode_cancel(avctx, pic);
309  return err;
310 }
311 
312 /** End a hardware decoding based frame. */
314 {
315  const H264Context *h = avctx->priv_data;
317  H264SliceContext *sl = &h->slice_ctx[0];
318  int ret;
319 
320  ret = ff_vaapi_decode_issue(avctx, pic);
321  if (ret < 0)
322  goto finish;
323 
324  ff_h264_draw_horiz_band(h, sl, 0, h->avctx->height);
325 
326 finish:
327  return ret;
328 }
329 
330 /** Decode the given H.264 slice with VA API. */
332  const uint8_t *buffer,
333  uint32_t size)
334 {
335  const H264Context *h = avctx->priv_data;
337  const H264SliceContext *sl = &h->slice_ctx[0];
338  VASliceParameterBufferH264 slice_param;
339  int err;
340 
341  slice_param = (VASliceParameterBufferH264) {
342  .slice_data_size = size,
343  .slice_data_offset = 0,
344  .slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
345  .slice_data_bit_offset = get_bits_count(&sl->gb),
346  .first_mb_in_slice = (sl->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + sl->mb_x,
347  .slice_type = ff_h264_get_slice_type(sl),
348  .direct_spatial_mv_pred_flag = sl->slice_type == AV_PICTURE_TYPE_B ? sl->direct_spatial_mv_pred : 0,
349  .num_ref_idx_l0_active_minus1 = sl->list_count > 0 ? sl->ref_count[0] - 1 : 0,
350  .num_ref_idx_l1_active_minus1 = sl->list_count > 1 ? sl->ref_count[1] - 1 : 0,
351  .cabac_init_idc = sl->cabac_init_idc,
352  .slice_qp_delta = sl->qscale - h->ps.pps->init_qp,
353  .disable_deblocking_filter_idc = sl->deblocking_filter < 2 ? !sl->deblocking_filter : sl->deblocking_filter,
354  .slice_alpha_c0_offset_div2 = sl->slice_alpha_c0_offset / 2,
355  .slice_beta_offset_div2 = sl->slice_beta_offset / 2,
356  .luma_log2_weight_denom = sl->pwt.luma_log2_weight_denom,
357  .chroma_log2_weight_denom = sl->pwt.chroma_log2_weight_denom,
358  };
359 
360  fill_vaapi_RefPicList(slice_param.RefPicList0, sl->ref_list[0],
361  sl->list_count > 0 ? sl->ref_count[0] : 0);
362  fill_vaapi_RefPicList(slice_param.RefPicList1, sl->ref_list[1],
363  sl->list_count > 1 ? sl->ref_count[1] : 0);
364 
366  &slice_param.luma_weight_l0_flag,
367  slice_param.luma_weight_l0,
368  slice_param.luma_offset_l0,
369  &slice_param.chroma_weight_l0_flag,
370  slice_param.chroma_weight_l0,
371  slice_param.chroma_offset_l0);
373  &slice_param.luma_weight_l1_flag,
374  slice_param.luma_weight_l1,
375  slice_param.luma_offset_l1,
376  &slice_param.chroma_weight_l1_flag,
377  slice_param.chroma_weight_l1,
378  slice_param.chroma_offset_l1);
379 
380  err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
381  &slice_param, sizeof(slice_param),
382  buffer, size);
383  if (err) {
384  ff_vaapi_decode_cancel(avctx, pic);
385  return err;
386  }
387 
388  return 0;
389 }
390 
392  .name = "h264_vaapi",
393  .type = AVMEDIA_TYPE_VIDEO,
394  .id = AV_CODEC_ID_H264,
395  .pix_fmt = AV_PIX_FMT_VAAPI,
396  .start_frame = &vaapi_h264_start_frame,
397  .end_frame = &vaapi_h264_end_frame,
398  .decode_slice = &vaapi_h264_decode_slice,
399  .frame_priv_data_size = sizeof(VAAPIDecodePicture),
402  .priv_data_size = sizeof(VAAPIDecodeContext),
403  .caps_internal = HWACCEL_CAP_ASYNC_SAFE,
404 };
int chroma_format_idc
Definition: h264_ps.h:47
int long_ref
1->long term reference 0->short term reference
Definition: h264dec.h:154
H264POCContext poc
Definition: h264dec.h:458
int weighted_bipred_idc
Definition: h264_ps.h:116
int chroma_qp_index_offset[2]
Definition: h264_ps.h:119
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int ff_vaapi_decode_make_param_buffer(AVCodecContext *avctx, VAAPIDecodePicture *pic, int type, const void *data, size_t size)
Definition: vaapi_decode.c:28
int luma_weight_flag[2]
7.4.3.2 luma_weight_lX_flag
Definition: h264_parse.h:35
AVHWAccel ff_h264_vaapi_hwaccel
Definition: vaapi_h264.c:391
int chroma_weight[48][2][2][2]
Definition: h264_parse.h:39
static VASurfaceID ff_vaapi_get_surface_id(AVFrame *pic)
Definition: vaapi_decode.h:35
Sequence parameter set.
Definition: h264_ps.h:43
Picture parameter set.
Definition: h264_ps.h:108
int frame_mbs_only_flag
Definition: h264_ps.h:61
int mb_height
Definition: h264dec.h:433
int max_size
Max number of reference frames. This is FF_ARRAY_ELEMS(VAPictureParameterBufferH264.ReferenceFrames)
Definition: vaapi_h264.c:84
H264Context.
Definition: h264dec.h:337
AVFrame * f
Definition: h264dec.h:129
H264Picture * long_ref[32]
Definition: h264dec.h:462
int picture_structure
Definition: h264dec.h:406
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264dec.h:267
static int vaapi_h264_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Decode the given H.264 slice with VA API.
Definition: vaapi_h264.c:331
uint8_t scaling_matrix4[6][16]
Definition: h264_ps.h:124
int deblocking_filter_parameters_present
deblocking_filter_parameters_present_flag
Definition: h264_ps.h:120
const PPS * pps
Definition: h264_ps.h:144
int ff_vaapi_decode_uninit(AVCodecContext *avctx)
Definition: vaapi_decode.c:603
uint8_t
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:279
static void fill_vaapi_plain_pred_weight_table(const H264Context *h, int list, unsigned char *luma_weight_flag, short luma_weight[32], short luma_offset[32], unsigned char *chroma_weight_flag, short chroma_weight[32][2], short chroma_offset[32][2])
Fill in prediction weight table.
Definition: vaapi_h264.c:188
int gaps_in_frame_num_allowed_flag
Definition: h264_ps.h:57
int slice_alpha_c0_offset
Definition: h264dec.h:194
int bit_depth_chroma
bit_depth_chroma_minus8 + 8
Definition: h264_ps.h:98
int ff_vaapi_decode_issue(AVCodecContext *avctx, VAAPIDecodePicture *pic)
Definition: vaapi_decode.c:149
int chroma_weight_flag[2]
7.4.3.2 chroma_weight_lX_flag
Definition: h264_parse.h:36
int cabac
entropy_coding_mode_flag
Definition: h264_ps.h:110
static void finish(void)
Definition: movenc.c:344
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
int redundant_pic_cnt_present
redundant_pic_cnt_present_flag
Definition: h264_ps.h:122
ptrdiff_t size
Definition: opengl_enc.c:101
int luma_weight[48][2][2]
Definition: h264_parse.h:38
void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height)
Definition: h264dec.c:104
H.264 parameter set handling.
int mb_aff
mb_adaptive_frame_field_flag
Definition: h264_ps.h:62
int chroma_log2_weight_denom
Definition: h264_parse.h:34
int poc_type
pic_order_cnt_type
Definition: h264_ps.h:50
int constrained_intra_pred
constrained_intra_pred_flag
Definition: h264_ps.h:121
void * hwaccel_picture_private
hardware accelerator private data
Definition: h264dec.h:142
int deblocking_filter
disable_deblocking_filter_idc with 1 <-> 0
Definition: h264dec.h:193
int weighted_pred
weighted_pred_flag
Definition: h264_ps.h:115
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
int direct_spatial_mv_pred
Definition: h264dec.h:251
int frame_num
frame_num (raw frame_num from slice header)
Definition: h264dec.h:149
int residual_color_transform_flag
residual_colour_transform_flag
Definition: h264_ps.h:99
int ff_h264_get_slice_type(const H264SliceContext *sl)
Reconstruct bitstream slice_type.
Definition: h264_slice.c:2138
#define fail()
Definition: checkasm.h:95
int delta_pic_order_always_zero_flag
Definition: h264_ps.h:52
static int fill_vaapi_ReferenceFrames(VAPictureParameterBufferH264 *pic_param, const H264Context *h)
Fill in VA API reference frames array.
Definition: vaapi_h264.c:125
static void fill_vaapi_RefPicList(VAPictureH264 RefPicList[32], const H264Ref *ref_list, unsigned int ref_count)
Fill in VA API reference picture lists from the FFmpeg reference picture list.
Definition: vaapi_h264.c:159
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:125
int ref_frame_count
num_ref_frames
Definition: h264_ps.h:56
const char * name
Name of the hardware accelerated codec.
Definition: avcodec.h:3855
int reference
Definition: h264dec.h:160
int ff_vaapi_decode_init(AVCodecContext *avctx)
Definition: vaapi_decode.c:471
static int vaapi_h264_end_frame(AVCodecContext *avctx)
End a hardware decoding based frame.
Definition: vaapi_h264.c:313
H264PredWeightTable pwt
Definition: h264dec.h:197
int size
Current number of reference frames in the DPB.
Definition: vaapi_h264.c:83
int init_qp
pic_init_qp_minus26 + 26
Definition: h264_ps.h:117
H.264 / AVC / MPEG-4 part10 codec.
H264SliceContext * slice_ctx
Definition: h264dec.h:350
int direct_8x8_inference_flag
Definition: h264_ps.h:63
int n
Definition: avisynth_c.h:684
#define FIELD_OR_MBAFF_PICTURE(h)
Definition: h264dec.h:91
#define FF_ARRAY_ELEMS(a)
int pic_order_present
pic_order_present_flag
Definition: h264_ps.h:111
VASurfaceID output_surface
Definition: vaapi_decode.h:45
AVCodecContext * avctx
Definition: h264dec.h:339
H264Picture * short_ref[32]
Definition: h264dec.h:461
int field_poc[2]
top/bottom POC
Definition: h264dec.h:147
main external API structure.
Definition: avcodec.h:1745
static void fill_vaapi_pic(VAPictureH264 *va_pic, const H264Picture *pic, int pic_structure)
Translate an FFmpeg Picture into its VA API form.
Definition: vaapi_h264.c:55
static int dpb_add(DPB *dpb, const H264Picture *pic)
Append picture to the decoded picture buffer, in a VA API form that merges the second field picture a...
Definition: vaapi_h264.c:94
H264Picture * cur_pic_ptr
Definition: h264dec.h:346
const SPS * sps
Definition: h264_ps.h:145
int log2_max_poc_lsb
log2_max_pic_order_cnt_lsb_minus4
Definition: h264_ps.h:51
int ff_vaapi_decode_cancel(AVCodecContext *avctx, VAAPIDecodePicture *pic)
Definition: vaapi_decode.c:221
int transform_8x8_mode
transform_8x8_mode_flag
Definition: h264_ps.h:123
unsigned int list_count
Definition: h264dec.h:268
int init_qs
pic_init_qs_minus26 + 26
Definition: h264_ps.h:118
int pic_id
pic_num (short -> no wrap version of pic_num, pic_num & max_pic_num; long -> long_pic_num) ...
Definition: h264dec.h:152
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264_ps.h:49
H264ParamSets ps
Definition: h264dec.h:454
Bi-dir predicted.
Definition: avutil.h:276
int bit_depth_luma
bit_depth_luma_minus8 + 8
Definition: h264_ps.h:97
static int vaapi_h264_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
Initialize and start decoding a frame with VA API.
Definition: vaapi_h264.c:226
#define HWACCEL_CAP_ASYNC_SAFE
Definition: hwaccel.h:22
void * priv_data
Definition: avcodec.h:1787
#define PICT_FRAME
Definition: mpegutils.h:39
static void init_vaapi_pic(VAPictureH264 *va_pic)
Initialize an empty VA API picture.
Definition: vaapi_h264.c:39
Decoded Picture Buffer (DPB).
Definition: vaapi_h264.c:82
int mb_width
Definition: h264dec.h:433
int slice_group_count
num_slice_groups_minus1 + 1
Definition: h264_ps.h:112
H264Ref ref_list[2][48]
0..15: frame refs, 16..47: mbaff field refs.
Definition: h264dec.h:269
VAPictureH264 * va_pics
Pointer to VAPictureParameterBufferH264.ReferenceFrames array.
Definition: vaapi_h264.c:85
int slice_beta_offset
Definition: h264dec.h:195
int level_idc
Definition: h264_ps.h:46
int ff_vaapi_decode_make_slice_buffer(AVCodecContext *avctx, VAAPIDecodePicture *pic, const void *params_data, size_t params_size, const void *slice_data, size_t slice_size)
Definition: vaapi_decode.c:57
int nal_ref_idc
Definition: h264dec.h:440
GetBitContext gb
Definition: h264dec.h:179
int cabac_init_idc
Definition: h264dec.h:320
GLuint buffer
Definition: opengl_enc.c:102
#define av_unused
Definition: attributes.h:125
int short_ref_count
number of actual short term references
Definition: h264dec.h:477
int mb_slice_group_map_type
Definition: h264_ps.h:113