FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vaapi_mpeg4.c
Go to the documentation of this file.
1 /*
2  * MPEG-4 / H.263 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 "vaapi_internal.h"
24 #include "internal.h"
25 #include "h263.h"
26 #include "mpeg4video.h"
27 #include "mpegvideo.h"
28 
29 /** Reconstruct bitstream intra_dc_vlc_thr */
31 {
32  switch (s->intra_dc_threshold) {
33  case 99: return 0;
34  case 13: return 1;
35  case 15: return 2;
36  case 17: return 3;
37  case 19: return 4;
38  case 21: return 5;
39  case 23: return 6;
40  case 0: return 7;
41  }
42  return 0;
43 }
44 
46 {
47  Mpeg4DecContext *ctx = avctx->priv_data;
48  MpegEncContext * const s = &ctx->m;
49  FFVAContext * const vactx = ff_vaapi_get_context(avctx);
50  VAPictureParameterBufferMPEG4 *pic_param;
51  VAIQMatrixBufferMPEG4 *iq_matrix;
52  int i;
53 
54  vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4);
55 
56  /* Fill in VAPictureParameterBufferMPEG4 */
57  pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4));
58  if (!pic_param)
59  return -1;
60  pic_param->vop_width = s->width;
61  pic_param->vop_height = s->height;
62  pic_param->forward_reference_picture = VA_INVALID_ID;
63  pic_param->backward_reference_picture = VA_INVALID_ID;
64  pic_param->vol_fields.value = 0; /* reset all bits */
65  pic_param->vol_fields.bits.short_video_header = avctx->codec->id == AV_CODEC_ID_H263;
66  pic_param->vol_fields.bits.chroma_format = CHROMA_420;
67  pic_param->vol_fields.bits.interlaced = !s->progressive_sequence;
68  pic_param->vol_fields.bits.obmc_disable = 1;
69  pic_param->vol_fields.bits.sprite_enable = ctx->vol_sprite_usage;
70  pic_param->vol_fields.bits.sprite_warping_accuracy = s->sprite_warping_accuracy;
71  pic_param->vol_fields.bits.quant_type = s->mpeg_quant;
72  pic_param->vol_fields.bits.quarter_sample = s->quarter_sample;
73  pic_param->vol_fields.bits.data_partitioned = s->data_partitioning;
74  pic_param->vol_fields.bits.reversible_vlc = ctx->rvlc;
75  pic_param->vol_fields.bits.resync_marker_disable = !ctx->resync_marker;
76  pic_param->no_of_sprite_warping_points = ctx->num_sprite_warping_points;
77  for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
78  pic_param->sprite_trajectory_du[i] = ctx->sprite_traj[i][0];
79  pic_param->sprite_trajectory_dv[i] = ctx->sprite_traj[i][1];
80  }
81  pic_param->quant_precision = s->quant_precision;
82  pic_param->vop_fields.value = 0; /* reset all bits */
83  pic_param->vop_fields.bits.vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I;
84  pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0;
85  pic_param->vop_fields.bits.vop_rounding_type = s->no_rounding;
86  pic_param->vop_fields.bits.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(ctx);
87  pic_param->vop_fields.bits.top_field_first = s->top_field_first;
88  pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan;
89  pic_param->vop_fcode_forward = s->f_code;
90  pic_param->vop_fcode_backward = s->b_code;
91  pic_param->vop_time_increment_resolution = avctx->framerate.num;
92  pic_param->num_macroblocks_in_gob = s->mb_width * H263_GOB_HEIGHT(s->height);
93  pic_param->num_gobs_in_vop = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob;
94  pic_param->TRB = s->pb_time;
95  pic_param->TRD = s->pp_time;
96 
98  pic_param->backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
99  if (s->pict_type != AV_PICTURE_TYPE_I)
100  pic_param->forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
101 
102  /* Fill in VAIQMatrixBufferMPEG4 */
103  /* Only the first inverse quantisation method uses the weighting matrices */
104  if (pic_param->vol_fields.bits.quant_type) {
105  iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4));
106  if (!iq_matrix)
107  return -1;
108  iq_matrix->load_intra_quant_mat = 1;
109  iq_matrix->load_non_intra_quant_mat = 1;
110 
111  for (i = 0; i < 64; i++) {
113  iq_matrix->intra_quant_mat[i] = s->intra_matrix[n];
114  iq_matrix->non_intra_quant_mat[i] = s->inter_matrix[n];
115  }
116  }
117  return 0;
118 }
119 
121 {
122  MpegEncContext * const s = avctx->priv_data;
123  FFVAContext * const vactx = ff_vaapi_get_context(avctx);
124  VASliceParameterBufferMPEG4 *slice_param;
125 
126  /* Fill in VASliceParameterBufferMPEG4 */
127  slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(vactx, buffer, size);
128  if (!slice_param)
129  return -1;
130  slice_param->macroblock_offset = get_bits_count(&s->gb) % 8;
131  slice_param->macroblock_number = 0;
132  slice_param->quant_scale = s->qscale;
133 
134  return 0;
135 }
136 
137 #if CONFIG_MPEG4_VAAPI_HWACCEL
138 AVHWAccel ff_mpeg4_vaapi_hwaccel = {
139  .name = "mpeg4_vaapi",
140  .type = AVMEDIA_TYPE_VIDEO,
141  .id = AV_CODEC_ID_MPEG4,
142  .pix_fmt = AV_PIX_FMT_VAAPI,
143  .start_frame = vaapi_mpeg4_start_frame,
144  .end_frame = ff_vaapi_mpeg_end_frame,
145  .decode_slice = vaapi_mpeg4_decode_slice,
146  .init = ff_vaapi_context_init,
147  .uninit = ff_vaapi_context_fini,
148  .priv_data_size = sizeof(FFVAContext),
149 };
150 #endif
151 
152 #if CONFIG_H263_VAAPI_HWACCEL
153 AVHWAccel ff_h263_vaapi_hwaccel = {
154  .name = "h263_vaapi",
155  .type = AVMEDIA_TYPE_VIDEO,
156  .id = AV_CODEC_ID_H263,
157  .pix_fmt = AV_PIX_FMT_VAAPI,
158  .start_frame = vaapi_mpeg4_start_frame,
159  .end_frame = ff_vaapi_mpeg_end_frame,
160  .decode_slice = vaapi_mpeg4_decode_slice,
161  .init = ff_vaapi_context_init,
162  .uninit = ff_vaapi_context_fini,
163  .priv_data_size = sizeof(FFVAContext),
164 };
165 #endif
VASliceParameterBufferBase * ff_vaapi_alloc_slice(FFVAContext *vactx, const uint8_t *buffer, uint32_t size)
Allocate a new slice descriptor for the input slice.
Definition: vaapi.c:178
uint16_t sprite_traj[4][2]
sprite trajectory points
Definition: mpeg4video.h:75
IDCTDSPContext idsp
Definition: mpegvideo.h:227
const struct AVCodec * codec
Definition: avcodec.h:1657
AVRational framerate
Definition: avcodec.h:3337
int ff_vaapi_context_fini(AVCodecContext *avctx)
Common AVHWAccel.uninit() implementation.
Definition: vaapi.c:66
const char * s
Definition: avisynth_c.h:631
int sprite_warping_accuracy
Definition: mpegvideo.h:401
int resync_marker
could this stream contain resync markers
Definition: mpeg4video.h:82
int num
numerator
Definition: rational.h:44
mpegvideo header.
int qscale
QP.
Definition: mpegvideo.h:201
int quant_precision
Definition: mpegvideo.h:398
int vol_sprite_usage
Definition: mpeg4video.h:71
uint8_t
unsigned int slice_param_size
Size of a slice parameter element.
int no_rounding
apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always ...
Definition: mpegvideo.h:284
#define CHROMA_420
Definition: mpegvideo.h:472
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
uint16_t pp_time
time distance between the last 2 p,s,i frames
Definition: mpegvideo.h:390
void * ff_vaapi_alloc_iq_matrix(FFVAContext *vactx, unsigned int size)
Allocate a new IQ matrix buffer.
Definition: vaapi.c:168
static FFVAContext * ff_vaapi_get_context(AVCodecContext *avctx)
Extract vaapi_context from an AVCodecContext.
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:126
ptrdiff_t size
Definition: opengl_enc.c:101
int intra_dc_threshold
QP above which the ac VLC should be used for intra dc.
Definition: mpeg4video.h:92
MpegEncContext m
Definition: mpeg4video.h:66
enum AVCodecID id
Definition: avcodec.h:3555
static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: vaapi_mpeg4.c:120
int ff_vaapi_context_init(AVCodecContext *avctx)
Common AVHWAccel.init() implementation.
Definition: vaapi.c:45
int quarter_sample
1->qpel, 0->half pel ME/MC
Definition: mpegvideo.h:399
GetBitContext gb
Definition: mpegvideo.h:445
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:258
int top_field_first
Definition: mpegvideo.h:462
const char * name
Name of the hardware accelerated codec.
Definition: avcodec.h:3667
int alternate_scan
Definition: mpegvideo.h:467
AVFormatContext * ctx
Definition: movenc.c:48
static VASurfaceID ff_vaapi_get_surface_id(AVFrame *pic)
Extract VASurfaceID from an AVFrame.
int n
Definition: avisynth_c.h:547
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
uint16_t inter_matrix[64]
Definition: mpegvideo.h:302
main external API structure.
Definition: avcodec.h:1648
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:97
int data_partitioning
data partitioning flag from header
Definition: mpegvideo.h:402
int progressive_sequence
Definition: mpegvideo.h:453
struct AVFrame * f
Definition: mpegpicture.h:46
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
int f_code
forward MV resolution
Definition: mpegvideo.h:235
void * ff_vaapi_alloc_pic_param(FFVAContext *vactx, unsigned int size)
Allocate a new picture parameter buffer.
Definition: vaapi.c:163
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:209
static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
Reconstruct bitstream intra_dc_vlc_thr.
Definition: vaapi_mpeg4.c:30
MpegEncContext.
Definition: mpegvideo.h:78
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
Definition: vaapi_mpeg4.c:45
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
Picture last_picture
copy of the previous picture structure.
Definition: mpegvideo.h:159
Bi-dir predicted.
Definition: avutil.h:268
#define H263_GOB_HEIGHT(h)
Definition: h263.h:44
void * priv_data
Definition: avcodec.h:1690
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
int ff_vaapi_mpeg_end_frame(AVCodecContext *avctx)
int num_sprite_warping_points
Definition: mpeg4video.h:73
int b_code
backward MV resolution for B-frames (MPEG-4)
Definition: mpegvideo.h:236
GLuint buffer
Definition: opengl_enc.c:102
#define av_unused
Definition: attributes.h:126
uint16_t pb_time
time distance between the last b and p,s,i frame
Definition: mpegvideo.h:391