FFmpeg  2.1.1
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 "mpegvideo.h"
23 #include "msmpeg4data.h"
24 #include "simple_idct.h"
25 #include "wmv2.h"
26 
27 
29  MpegEncContext * const s= &w->s;
30 
31  ff_wmv2dsp_init(&w->wdsp);
34  w->wdsp.idct_perm);
47  s->dsp.idct_put = w->wdsp.idct_put;
48  s->dsp.idct_add = w->wdsp.idct_add;
49  s->dsp.idct = NULL;
50 }
51 
52 static void wmv2_add_block(Wmv2Context *w, int16_t *block1, uint8_t *dst, int stride, int n){
53  MpegEncContext * const s= &w->s;
54 
55  if (s->block_last_index[n] >= 0) {
56  switch(w->abt_type_table[n]){
57  case 0:
58  w->wdsp.idct_add(dst, stride, block1);
59  break;
60  case 1:
61  ff_simple_idct84_add(dst , stride, block1);
62  ff_simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
63  s->dsp.clear_block(w->abt_block2[n]);
64  break;
65  case 2:
66  ff_simple_idct48_add(dst , stride, block1);
67  ff_simple_idct48_add(dst + 4 , stride, w->abt_block2[n]);
68  s->dsp.clear_block(w->abt_block2[n]);
69  break;
70  default:
71  av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
72  }
73  }
74 }
75 
76 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){
77  Wmv2Context * const w= (Wmv2Context*)s;
78 
79  wmv2_add_block(w, block1[0], dest_y , s->linesize, 0);
80  wmv2_add_block(w, block1[1], dest_y + 8 , s->linesize, 1);
81  wmv2_add_block(w, block1[2], dest_y + 8*s->linesize, s->linesize, 2);
82  wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3);
83 
84  if(s->flags&CODEC_FLAG_GRAY) return;
85 
86  wmv2_add_block(w, block1[4], dest_cb , s->uvlinesize, 4);
87  wmv2_add_block(w, block1[5], dest_cr , s->uvlinesize, 5);
88 }
89 
91  uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
92  uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
93  int motion_x, int motion_y, int h)
94 {
95  Wmv2Context * const w= (Wmv2Context*)s;
96  uint8_t *ptr;
97  int dxy, mx, my, src_x, src_y, v_edge_pos;
98  ptrdiff_t offset, linesize, uvlinesize;
99  int emu=0;
100 
101  dxy = ((motion_y & 1) << 1) | (motion_x & 1);
102  dxy = 2*dxy + w->hshift;
103  src_x = s->mb_x * 16 + (motion_x >> 1);
104  src_y = s->mb_y * 16 + (motion_y >> 1);
105 
106  /* WARNING: do no forget half pels */
107  v_edge_pos = s->v_edge_pos;
108  src_x = av_clip(src_x, -16, s->width);
109  src_y = av_clip(src_y, -16, s->height);
110 
111  if(src_x<=-16 || src_x >= s->width)
112  dxy &= ~3;
113  if(src_y<=-16 || src_y >= s->height)
114  dxy &= ~4;
115 
116  linesize = s->linesize;
117  uvlinesize = s->uvlinesize;
118  ptr = ref_picture[0] + (src_y * linesize) + src_x;
119 
120  if(src_x<1 || src_y<1 || src_x + 17 >= s->h_edge_pos
121  || src_y + h+1 >= v_edge_pos){
123  ptr - 1 - s->linesize, s->linesize, 19, 19,
124  src_x-1, src_y-1,
125  s->h_edge_pos, s->v_edge_pos);
126  ptr= s->edge_emu_buffer + 1 + s->linesize;
127  emu=1;
128  }
129 
130  s->dsp.put_mspel_pixels_tab[dxy](dest_y , ptr , linesize);
131  s->dsp.put_mspel_pixels_tab[dxy](dest_y+8 , ptr+8 , linesize);
132  s->dsp.put_mspel_pixels_tab[dxy](dest_y +8*linesize, ptr +8*linesize, linesize);
133  s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);
134 
135  if(s->flags&CODEC_FLAG_GRAY) return;
136 
137  if (s->out_format == FMT_H263) {
138  dxy = 0;
139  if ((motion_x & 3) != 0)
140  dxy |= 1;
141  if ((motion_y & 3) != 0)
142  dxy |= 2;
143  mx = motion_x >> 2;
144  my = motion_y >> 2;
145  } else {
146  mx = motion_x / 2;
147  my = motion_y / 2;
148  dxy = ((my & 1) << 1) | (mx & 1);
149  mx >>= 1;
150  my >>= 1;
151  }
152 
153  src_x = s->mb_x * 8 + mx;
154  src_y = s->mb_y * 8 + my;
155  src_x = av_clip(src_x, -8, s->width >> 1);
156  if (src_x == (s->width >> 1))
157  dxy &= ~1;
158  src_y = av_clip(src_y, -8, s->height >> 1);
159  if (src_y == (s->height >> 1))
160  dxy &= ~2;
161  offset = (src_y * uvlinesize) + src_x;
162  ptr = ref_picture[1] + offset;
163  if(emu){
165  ptr, s->uvlinesize, 9, 9, src_x, src_y,
166  s->h_edge_pos>>1, s->v_edge_pos>>1);
167  ptr= s->edge_emu_buffer;
168  }
169  pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
170 
171  ptr = ref_picture[2] + offset;
172  if(emu){
174  ptr, s->uvlinesize, 9, 9, src_x, src_y,
175  s->h_edge_pos>>1, s->v_edge_pos>>1);
176  ptr= s->edge_emu_buffer;
177  }
178  pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
179 }
const char * s
Definition: avisynth_c.h:668
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, int idct_permutation_type)
Definition: dsputil.c:134
ScanTable intra_v_scantable
Definition: mpegvideo.h:302
void ff_simple_idct84_add(uint8_t *dest, int line_size, int16_t *block)
Definition: simple_idct.c:180
void(* emulated_edge_mc)(uint8_t *dst, ptrdiff_t dst_stride, const uint8_t *src, ptrdiff_t src_stride, 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:61
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:285
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
int abt_type_table[6]
Definition: wmv2.h:43
mpegvideo header.
int stride
Definition: mace.c:144
#define av_cold
Definition: avcodec.h:653
void(* idct_add)(uint8_t *dest, int line_size, int16_t *block)
block -&gt; idct -&gt; add dest -&gt; clip to unsigned 8 bit -&gt; dest.
Definition: dsputil.h:232
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
block -&gt; idct -&gt; clip to unsigned 8 bit -&gt; dest.
Definition: dsputil.h:226
uint8_t
int idct_perm
Definition: wmv2dsp.h:28
enum OutputFormat out_format
output format
Definition: mpegvideo.h:253
static const uint8_t offset[511][2]
Definition: vf_uspp.c:58
MSMPEG4 data tables.
uint8_t idct_permutation[64]
idct input permutation.
Definition: dsputil.h:246
MpegEncContext s
Definition: wmv2.h:36
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
Definition: wmv2dsp.h:26
qpel_mc_func put_mspel_pixels_tab[8]
Definition: dsputil.h:189
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
static void wmv2_add_block(Wmv2Context *w, int16_t *block1, uint8_t *dst, int stride, int n)
Definition: wmv2.c:52
uint8_t * edge_emu_buffer
temporary buffer for if MVs point to out-of-frame data
Definition: mpegvideo.h:368
av_cold void ff_wmv2dsp_init(WMV2DSPContext *c)
Definition: wmv2dsp.c:141
Libavcodec external API header.
const uint8_t ff_wmv2_scantableB[64]
Definition: msmpeg4data.c:1994
void(* idct)(int16_t *block)
Definition: dsputil.h:219
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
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:90
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:295
int n
Definition: avisynth_c.h:588
void(* idct_add)(uint8_t *dest, int line_size, int16_t *block)
Definition: wmv2dsp.h:25
void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr)
Definition: wmv2.c:76
ptrdiff_t linesize
line size, in bytes, may be different from width
Definition: mpegvideo.h:287
int idct_permutation_type
Definition: dsputil.h:247
ScanTable intra_scantable
Definition: mpegvideo.h:300
const uint8_t ff_wmv2_scantableA[64]
Definition: msmpeg4data.c:1987
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:249
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: dsputil.c:111
ScanTable intra_h_scantable
Definition: mpegvideo.h:301
ptrdiff_t uvlinesize
line size, for chroma in bytes, may be different from width
Definition: mpegvideo.h:288
DSPContext dsp
pointers for accelerated dsp functions
Definition: mpegvideo.h:395
static int16_t block1[64]
Definition: dct-test.c:199
MpegEncContext.
Definition: mpegvideo.h:245
struct AVCodecContext * avctx
Definition: mpegvideo.h:247
#define CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:705
WMV2DSPContext wdsp
Definition: wmv2.h:38
void(* clear_block)(int16_t *block)
Definition: dsputil.h:142
int hshift
Definition: wmv2.h:51
VideoDSPContext vdsp
Definition: mpegvideo.h:398
simple idct header.
av_cold void ff_wmv2_common_init(Wmv2Context *w)
Definition: wmv2.c:28
int flags
AVCodecContext.flags (HQ, MV4, ...)
Definition: mpegvideo.h:264
ScanTable inter_scantable
if inter == intra then intra should be used to reduce tha cache usage
Definition: mpegvideo.h:299
static int ref_picture(H264Context *h, Picture *dst, Picture *src)
Definition: h264.c:313