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vaapi_mpeg2.c
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1 /*
2  * MPEG-2 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 "mpegutils.h"
24 #include "mpegvideo.h"
25 #include "internal.h"
26 #include "vaapi_decode.h"
27 
28 /** Reconstruct bitstream f_code */
29 static inline int mpeg2_get_f_code(const MpegEncContext *s)
30 {
31  return (s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) |
32  (s->mpeg_f_code[1][0] << 4) | s->mpeg_f_code[1][1];
33 }
34 
35 /** Determine frame start: first field for field picture or frame picture */
36 static inline int mpeg2_get_is_frame_start(const MpegEncContext *s)
37 {
38  return s->first_field || s->picture_structure == PICT_FRAME;
39 }
40 
42 {
43  const MpegEncContext *s = avctx->priv_data;
45  VAPictureParameterBufferMPEG2 pic_param;
46  VAIQMatrixBufferMPEG2 iq_matrix;
47  int i, err;
48 
50 
51  pic_param = (VAPictureParameterBufferMPEG2) {
52  .horizontal_size = s->width,
53  .vertical_size = s->height,
54  .forward_reference_picture = VA_INVALID_ID,
55  .backward_reference_picture = VA_INVALID_ID,
56  .picture_coding_type = s->pict_type,
57  .f_code = mpeg2_get_f_code(s),
58  .picture_coding_extension.bits = {
59  .intra_dc_precision = s->intra_dc_precision,
60  .picture_structure = s->picture_structure,
61  .top_field_first = s->top_field_first,
62  .frame_pred_frame_dct = s->frame_pred_frame_dct,
63  .concealment_motion_vectors = s->concealment_motion_vectors,
64  .q_scale_type = s->q_scale_type,
65  .intra_vlc_format = s->intra_vlc_format,
66  .alternate_scan = s->alternate_scan,
67  .repeat_first_field = s->repeat_first_field,
68  .progressive_frame = s->progressive_frame,
69  .is_first_field = mpeg2_get_is_frame_start(s),
70  },
71  };
72 
73  switch (s->pict_type) {
74  case AV_PICTURE_TYPE_B:
75  pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
76  // fall-through
77  case AV_PICTURE_TYPE_P:
78  pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
79  break;
80  }
81 
82  err = ff_vaapi_decode_make_param_buffer(avctx, pic,
83  VAPictureParameterBufferType,
84  &pic_param, sizeof(pic_param));
85  if (err < 0)
86  goto fail;
87 
88  iq_matrix.load_intra_quantiser_matrix = 1;
89  iq_matrix.load_non_intra_quantiser_matrix = 1;
90  iq_matrix.load_chroma_intra_quantiser_matrix = 1;
91  iq_matrix.load_chroma_non_intra_quantiser_matrix = 1;
92 
93  for (i = 0; i < 64; i++) {
95  iq_matrix.intra_quantiser_matrix[i] = s->intra_matrix[n];
96  iq_matrix.non_intra_quantiser_matrix[i] = s->inter_matrix[n];
97  iq_matrix.chroma_intra_quantiser_matrix[i] = s->chroma_intra_matrix[n];
98  iq_matrix.chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n];
99  }
100 
101  err = ff_vaapi_decode_make_param_buffer(avctx, pic,
102  VAIQMatrixBufferType,
103  &iq_matrix, sizeof(iq_matrix));
104  if (err < 0)
105  goto fail;
106 
107  return 0;
108 
109 fail:
110  ff_vaapi_decode_cancel(avctx, pic);
111  return err;
112 }
113 
115 {
116  MpegEncContext *s = avctx->priv_data;
118  int ret;
119 
120  ret = ff_vaapi_decode_issue(avctx, pic);
121  if (ret < 0)
122  goto fail;
123 
125 
126 fail:
127  return ret;
128 }
129 
130 static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
131 {
132  const MpegEncContext *s = avctx->priv_data;
134  VASliceParameterBufferMPEG2 slice_param;
135  GetBitContext gb;
136  uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset;
137  int err;
138 
139  /* Determine macroblock_offset */
140  init_get_bits(&gb, buffer, 8 * size);
141  if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */
142  return AVERROR_INVALIDDATA;
143  quantiser_scale_code = get_bits(&gb, 5);
144  intra_slice_flag = get_bits1(&gb);
145  if (intra_slice_flag) {
146  skip_bits(&gb, 8);
147  if (skip_1stop_8data_bits(&gb) < 0)
148  return AVERROR_INVALIDDATA;
149  }
150  macroblock_offset = get_bits_count(&gb);
151 
152  slice_param = (VASliceParameterBufferMPEG2) {
153  .slice_data_size = size,
154  .slice_data_offset = 0,
155  .slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
156  .macroblock_offset = macroblock_offset,
157  .slice_horizontal_position = s->mb_x,
158  .slice_vertical_position = s->mb_y >> (s->picture_structure != PICT_FRAME),
159  .quantiser_scale_code = quantiser_scale_code,
160  .intra_slice_flag = intra_slice_flag,
161  };
162 
163  err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
164  &slice_param, sizeof(slice_param),
165  buffer, size);
166  if (err < 0) {
167  ff_vaapi_decode_cancel(avctx, pic);
168  return err;
169  }
170 
171  return 0;
172 }
173 
175  .name = "mpeg2_vaapi",
176  .type = AVMEDIA_TYPE_VIDEO,
178  .pix_fmt = AV_PIX_FMT_VAAPI,
179  .start_frame = &vaapi_mpeg2_start_frame,
180  .end_frame = &vaapi_mpeg2_end_frame,
181  .decode_slice = &vaapi_mpeg2_decode_slice,
182  .frame_priv_data_size = sizeof(VAAPIDecodePicture),
185  .priv_data_size = sizeof(VAAPIDecodeContext),
186 };
IDCTDSPContext idsp
Definition: mpegvideo.h:227
static int mpeg2_get_f_code(const MpegEncContext *s)
Reconstruct bitstream f_code.
Definition: vaapi_mpeg2.c:29
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:261
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:27
uint16_t chroma_intra_matrix[64]
Definition: mpegvideo.h:301
uint16_t chroma_inter_matrix[64]
Definition: mpegvideo.h:303
static VASurfaceID ff_vaapi_get_surface_id(AVFrame *pic)
Definition: vaapi_decode.h:35
mpegvideo header.
void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h)
Definition: mpegvideo.c:2734
int ff_vaapi_decode_uninit(AVCodecContext *avctx)
Definition: vaapi_decode.c:517
uint8_t
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:287
int ff_vaapi_decode_issue(AVCodecContext *avctx, VAAPIDecodePicture *pic)
Definition: vaapi_decode.c:148
int intra_dc_precision
Definition: mpegvideo.h:461
int repeat_first_field
Definition: mpegvideo.h:470
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
ptrdiff_t size
Definition: opengl_enc.c:101
#define fail()
Definition: checkasm.h:85
static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
Definition: vaapi_mpeg2.c:41
int intra_vlc_format
Definition: mpegvideo.h:467
int progressive_frame
Definition: mpegvideo.h:479
int top_field_first
Definition: mpegvideo.h:463
const char * name
Name of the hardware accelerated codec.
Definition: avcodec.h:3772
int ff_vaapi_decode_init(AVCodecContext *avctx)
Definition: vaapi_decode.c:421
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:181
int alternate_scan
Definition: mpegvideo.h:468
void * hwaccel_picture_private
Hardware accelerator private data.
Definition: mpegpicture.h:77
static int mpeg2_get_is_frame_start(const MpegEncContext *s)
Determine frame start: first field for field picture or frame picture.
Definition: vaapi_mpeg2.c:36
int n
Definition: avisynth_c.h:684
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
int mpeg_f_code[2][2]
Definition: mpegvideo.h:455
static int vaapi_mpeg2_end_frame(AVCodecContext *avctx)
Definition: vaapi_mpeg2.c:114
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:196
int first_field
is 1 for the first field of a field picture 0 otherwise
Definition: mpegvideo.h:482
VASurfaceID output_surface
Definition: vaapi_decode.h:45
int frame_pred_frame_dct
Definition: mpegvideo.h:462
uint16_t inter_matrix[64]
Definition: mpegvideo.h:302
int concealment_motion_vectors
Definition: mpegvideo.h:464
main external API structure.
Definition: avcodec.h:1691
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:97
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:313
AVHWAccel ff_mpeg2_vaapi_hwaccel
Definition: vaapi_mpeg2.c:174
static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: vaapi_mpeg2.c:130
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:306
struct AVFrame * f
Definition: mpegpicture.h:46
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:425
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:346
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:209
int ff_vaapi_decode_cancel(AVCodecContext *avctx, VAAPIDecodePicture *pic)
Definition: vaapi_decode.c:220
MpegEncContext.
Definition: mpegvideo.h:78
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
common internal api header.
Picture last_picture
copy of the previous picture structure.
Definition: mpegvideo.h:159
Bi-dir predicted.
Definition: avutil.h:276
void * priv_data
Definition: avcodec.h:1733
#define PICT_FRAME
Definition: mpegutils.h:39
int picture_structure
Definition: mpegvideo.h:458
Picture next_picture
copy of the next picture structure.
Definition: mpegvideo.h:165
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
Definition: mpegvideo.h:300
static int skip_1stop_8data_bits(GetBitContext *gb)
Definition: get_bits.h:592
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:56
Predicted.
Definition: avutil.h:275
GLuint buffer
Definition: opengl_enc.c:102
#define av_unused
Definition: attributes.h:125