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wmv2.c
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1 /*
2  * Copyright (c) 2002 The FFmpeg Project
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "avcodec.h"
22 #include "idctdsp.h"
23 #include "mpegutils.h"
24 #include "mpegvideo.h"
25 #include "msmpeg4data.h"
26 #include "simple_idct.h"
27 #include "wmv2.h"
28 
29 
31 {
32  MpegEncContext *const s = &w->s;
33 
34  ff_blockdsp_init(&s->bdsp, s->avctx);
35  ff_wmv2dsp_init(&w->wdsp);
36  s->idsp.perm_type = w->wdsp.idct_perm;
38  w->wdsp.idct_perm);
51  s->idsp.idct_put = w->wdsp.idct_put;
52  s->idsp.idct_add = w->wdsp.idct_add;
53  s->idsp.idct = NULL;
54 }
55 
56 static void wmv2_add_block(Wmv2Context *w, int16_t *block1,
57  uint8_t *dst, int stride, int n)
58 {
59  MpegEncContext *const s = &w->s;
60 
61  if (s->block_last_index[n] >= 0) {
62  switch (w->abt_type_table[n]) {
63  case 0:
64  w->wdsp.idct_add(dst, stride, block1);
65  break;
66  case 1:
67  ff_simple_idct84_add(dst, stride, block1);
68  ff_simple_idct84_add(dst + 4 * stride, stride, w->abt_block2[n]);
69  s->bdsp.clear_block(w->abt_block2[n]);
70  break;
71  case 2:
72  ff_simple_idct48_add(dst, stride, block1);
73  ff_simple_idct48_add(dst + 4, stride, w->abt_block2[n]);
74  s->bdsp.clear_block(w->abt_block2[n]);
75  break;
76  default:
77  av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
78  }
79  }
80 }
81 
82 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block1[6][64],
83  uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr)
84 {
85  Wmv2Context *const w = (Wmv2Context *) s;
86 
87  wmv2_add_block(w, block1[0], dest_y, s->linesize, 0);
88  wmv2_add_block(w, block1[1], dest_y + 8, s->linesize, 1);
89  wmv2_add_block(w, block1[2], dest_y + 8 * s->linesize, s->linesize, 2);
90  wmv2_add_block(w, block1[3], dest_y + 8 + 8 * s->linesize, s->linesize, 3);
91 
92  if (s->avctx->flags & CODEC_FLAG_GRAY)
93  return;
94 
95  wmv2_add_block(w, block1[4], dest_cb, s->uvlinesize, 4);
96  wmv2_add_block(w, block1[5], dest_cr, s->uvlinesize, 5);
97 }
98 
100  uint8_t *dest_cb, uint8_t *dest_cr,
101  uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
102  int motion_x, int motion_y, int h)
103 {
104  Wmv2Context *const w = (Wmv2Context *) s;
105  uint8_t *ptr;
106  int dxy, mx, my, src_x, src_y, v_edge_pos;
107  ptrdiff_t offset, linesize, uvlinesize;
108  int emu = 0;
109 
110  dxy = ((motion_y & 1) << 1) | (motion_x & 1);
111  dxy = 2 * dxy + w->hshift;
112  src_x = s->mb_x * 16 + (motion_x >> 1);
113  src_y = s->mb_y * 16 + (motion_y >> 1);
114 
115  /* WARNING: do no forget half pels */
116  v_edge_pos = s->v_edge_pos;
117  src_x = av_clip(src_x, -16, s->width);
118  src_y = av_clip(src_y, -16, s->height);
119 
120  if (src_x <= -16 || src_x >= s->width)
121  dxy &= ~3;
122  if (src_y <= -16 || src_y >= s->height)
123  dxy &= ~4;
124 
125  linesize = s->linesize;
126  uvlinesize = s->uvlinesize;
127  ptr = ref_picture[0] + (src_y * linesize) + src_x;
128 
129  if (src_x < 1 || src_y < 1 || src_x + 17 >= s->h_edge_pos ||
130  src_y + h + 1 >= v_edge_pos) {
131  s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr - 1 - s->linesize,
132  s->linesize, s->linesize, 19, 19,
133  src_x - 1, src_y - 1,
134  s->h_edge_pos, s->v_edge_pos);
135  ptr = s->sc.edge_emu_buffer + 1 + s->linesize;
136  emu = 1;
137  }
138 
139  w->wdsp.put_mspel_pixels_tab[dxy](dest_y, ptr, linesize);
140  w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8, ptr + 8, linesize);
141  w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8 * linesize, ptr + 8 * linesize, linesize);
142  w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8 + 8 * linesize, ptr + 8 + 8 * linesize, linesize);
143 
144  if (s->avctx->flags & CODEC_FLAG_GRAY)
145  return;
146 
147  dxy = 0;
148  if ((motion_x & 3) != 0)
149  dxy |= 1;
150  if ((motion_y & 3) != 0)
151  dxy |= 2;
152  mx = motion_x >> 2;
153  my = motion_y >> 2;
154 
155  src_x = s->mb_x * 8 + mx;
156  src_y = s->mb_y * 8 + my;
157  src_x = av_clip(src_x, -8, s->width >> 1);
158  if (src_x == (s->width >> 1))
159  dxy &= ~1;
160  src_y = av_clip(src_y, -8, s->height >> 1);
161  if (src_y == (s->height >> 1))
162  dxy &= ~2;
163  offset = (src_y * uvlinesize) + src_x;
164  ptr = ref_picture[1] + offset;
165  if (emu) {
167  s->uvlinesize, s->uvlinesize,
168  9, 9,
169  src_x, src_y,
170  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
171  ptr = s->sc.edge_emu_buffer;
172  }
173  pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
174 
175  ptr = ref_picture[2] + offset;
176  if (emu) {
178  s->uvlinesize, s->uvlinesize,
179  9, 9,
180  src_x, src_y,
181  s->h_edge_pos >> 1, s->v_edge_pos >> 1);
182  ptr = s->sc.edge_emu_buffer;
183  }
184  pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
185 }
IDCTDSPContext idsp
Definition: mpegvideo.h:299
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
void ff_wmv2_add_mb(MpegEncContext *s, int16_t block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr)
Definition: wmv2.c:82
ScanTable intra_v_scantable
Definition: mpegvideo.h:162
void ff_simple_idct84_add(uint8_t *dest, int line_size, int16_t *block)
Definition: simple_idct.c:180
void(* clear_block)(int16_t *block)
Definition: blockdsp.h:35
uint8_t * edge_emu_buffer
temporary buffer for if MVs point to out-of-frame data
Definition: mpegvideo.h:141
int16_t abt_block2[6][64]
Definition: wmv2.h:54
int v_edge_pos
horizontal / vertical position of the right/bottom edge (pixel replication)
Definition: mpegvideo.h:201
int abt_type_table[6]
Definition: wmv2.h:43
mpegvideo header.
void(* emulated_edge_mc)(uint8_t *dst, const uint8_t *src, ptrdiff_t dst_linesize, ptrdiff_t src_linesize, int block_w, int block_h, int src_x, int src_y, int w, int h)
Copy a rectangular area of samples to a temporary buffer and replicate the border samples...
Definition: videodsp.h:63
ScratchpadContext sc
Definition: mpegvideo.h:271
uint8_t
#define av_cold
Definition: attributes.h:74
int idct_perm
Definition: wmv2dsp.h:32
MSMPEG4 data tables.
MpegEncContext s
Definition: wmv2.h:36
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
Definition: wmv2dsp.h:28
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static void wmv2_add_block(Wmv2Context *w, int16_t *block1, uint8_t *dst, int stride, int n)
Definition: wmv2.c:56
int flags
CODEC_FLAG_*.
Definition: avcodec.h:1335
av_cold void ff_wmv2dsp_init(WMV2DSPContext *c)
Definition: wmv2dsp.c:251
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
Libavcodec external API header.
const uint8_t ff_wmv2_scantableB[64]
Definition: msmpeg4data.c:1994
qpel_mc_func put_mspel_pixels_tab[8]
Definition: wmv2dsp.h:30
const uint8_t ff_wmv1_scantable[WMV1_SCANTABLE_COUNT][64]
Definition: msmpeg4data.c:1825
void(* op_pixels_func)(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
Definition: hpeldsp.h:38
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
Definition: idctdsp.c:50
ScanTable abt_scantable[2]
Definition: wmv2.h:53
void ff_simple_idct48_add(uint8_t *dest, int line_size, int16_t *block)
Definition: simple_idct.c:195
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:155
int n
Definition: avisynth_c.h:547
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
void(* idct_add)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:77
void(* idct_add)(uint8_t *dest, int line_size, int16_t *block)
Definition: wmv2dsp.h:27
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:70
ptrdiff_t linesize
line size, in bytes, may be different from width
Definition: mpegvideo.h:203
BlockDSPContext bdsp
Definition: mpegvideo.h:295
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:58
ScanTable intra_scantable
Definition: mpegvideo.h:160
const uint8_t ff_wmv2_scantableA[64]
Definition: msmpeg4data.c:1987
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:169
ScanTable intra_h_scantable
Definition: mpegvideo.h:161
ptrdiff_t uvlinesize
line size, for chroma in bytes, may be different from width
Definition: mpegvideo.h:204
static int16_t block1[64]
Definition: dct-test.c:111
MpegEncContext.
Definition: mpegvideo.h:150
struct AVCodecContext * avctx
Definition: mpegvideo.h:167
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
#define CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:738
void ff_mspel_motion(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture, op_pixels_func(*pix_op)[4], int motion_x, int motion_y, int h)
Definition: wmv2.c:99
WMV2DSPContext wdsp
Definition: wmv2.h:38
int hshift
Definition: wmv2.h:51
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
VideoDSPContext vdsp
Definition: mpegvideo.h:305
simple idct header.
av_cold void ff_wmv2_common_init(Wmv2Context *w)
Definition: wmv2.c:30
ScanTable inter_scantable
if inter == intra then intra should be used to reduce tha cache usage
Definition: mpegvideo.h:159
enum idct_permutation_type perm_type
Definition: idctdsp.h:95
void(* idct)(int16_t *block)
Definition: idctdsp.h:63