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
RENAME(v210_enc)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 }
91