FFmpeg
v210_template.c
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1 /*
2  * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
3  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "bytestream.h"
23 #include "internal.h"
24 
25 #define CLIP(v, depth) av_clip(v, 1<<(depth-8), ((1<<depth)-(1<<(depth-8))-1))
26 #define WRITE_PIXELS(a, b, c, depth) \
27  do { \
28  val = CLIP(*a++, depth) << (10-depth); \
29  val |= (CLIP(*b++, depth) << (20-depth)) | \
30  (CLIP(*c++, depth) << (30-depth)); \
31  AV_WL32(dst, val); \
32  dst += 4; \
33  } while (0)
34 
35 static void RENAME(v210_enc)(AVCodecContext *avctx,
36  uint8_t *dst, const AVFrame *pic)
37 {
38  V210EncContext *s = avctx->priv_data;
39  int aligned_width = ((avctx->width + 47) / 48) * 48;
40  int stride = aligned_width * 8 / 3;
41  int line_padding = stride - ((avctx->width * 8 + 11) / 12) * 4;
42  int h, w;
43  const TYPE *y = (const TYPE *)pic->data[0];
44  const TYPE *u = (const TYPE *)pic->data[1];
45  const TYPE *v = (const TYPE *)pic->data[2];
46  const int sample_size = 6 * s->RENAME(sample_factor);
47  const int sample_w = avctx->width / sample_size;
48 
49  for (h = 0; h < avctx->height; h++) {
50  uint32_t val;
51  w = sample_w * sample_size;
52  s->RENAME(pack_line)(y, u, v, dst, w);
53 
54  y += w;
55  u += w >> 1;
56  v += w >> 1;
57  dst += sample_w * 16 * s->RENAME(sample_factor);
58 
59  for (; w < avctx->width - 5; w += 6) {
60  WRITE_PIXELS(u, y, v, DEPTH);
61  WRITE_PIXELS(y, u, y, DEPTH);
62  WRITE_PIXELS(v, y, u, DEPTH);
63  WRITE_PIXELS(y, v, y, DEPTH);
64  }
65  if (w < avctx->width - 1) {
66  WRITE_PIXELS(u, y, v, DEPTH);
67 
68  val = CLIP(*y++, DEPTH) << (10-DEPTH);
69  if (w == avctx->width - 2) {
70  AV_WL32(dst, val);
71  dst += 4;
72  }
73  }
74  if (w < avctx->width - 3) {
75  val |= (CLIP(*u++, DEPTH) << (20-DEPTH)) | (CLIP(*y++, DEPTH) << (30-DEPTH));
76  AV_WL32(dst, val);
77  dst += 4;
78 
79  val = CLIP(*v++, DEPTH) << (10-DEPTH) | (CLIP(*y++, DEPTH) << (20-DEPTH));
80  AV_WL32(dst, val);
81  dst += 4;
82  }
83 
84  memset(dst, 0, line_padding);
85  dst += line_padding;
86  y += pic->linesize[0] / BYTES_PER_PIXEL - avctx->width;
87  u += pic->linesize[1] / BYTES_PER_PIXEL - avctx->width / 2;
88  v += pic->linesize[2] / BYTES_PER_PIXEL - avctx->width / 2;
89  }
90 }
const char const char void * val
Definition: avisynth_c.h:863
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
#define CLIP(v, depth)
Definition: v210_template.c:25
#define RENAME(name)
Definition: ffv1.h:197
uint8_t
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:252
#define width
uint8_t w
Definition: llviddspenc.c:38
#define s(width, name)
Definition: cbs_vp9.c:257
#define BYTES_PER_PIXEL
Definition: v210enc.c:41
main external API structure.
Definition: avcodec.h:1570
#define DEPTH
Definition: v210enc.c:40
#define TYPE
Definition: ffv1.h:196
#define WRITE_PIXELS(a, b, c, depth)
Definition: v210_template.c:26
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:104
common internal api header.
#define AV_WL32(p, v)
Definition: intreadwrite.h:426