Fix bandwith vs. bandwiDth typo.
[libav.git] / libavcodec / v210dec.c
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ca0bb1c4
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1/*
2 * V210 decoder
3 *
4 * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
5 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include "avcodec.h"
25#include "libavutil/bswap.h"
26
27static av_cold int decode_init(AVCodecContext *avctx)
28{
29 if (avctx->width & 1) {
30 av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
31 return -1;
32 }
33 if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0)
34 return -1;
35 avctx->pix_fmt = PIX_FMT_YUV422P16;
36 avctx->bits_per_raw_sample = 10;
37
38 avctx->coded_frame = avcodec_alloc_frame();
39
40 return 0;
41}
42
43static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
44{
45 int h, w;
46 AVFrame *pic = avctx->coded_frame;
47 const uint8_t *psrc = avpkt->data;
48 uint16_t *y, *u, *v;
49 int aligned_width = ((avctx->width + 47) / 48) * 48;
50 int stride = aligned_width * 8 / 3;
51
52 if (pic->data[0])
53 avctx->release_buffer(avctx, pic);
54
55 if (avpkt->size < stride * avctx->height) {
56 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
57 return -1;
58 }
59
60 pic->reference = 0;
61 if (avctx->get_buffer(avctx, pic) < 0)
62 return -1;
63
64 y = pic->data[0];
65 u = pic->data[1];
66 v = pic->data[2];
67 pic->pict_type = FF_I_TYPE;
68 pic->key_frame = 1;
69
70#define READ_PIXELS(a, b, c) \
71 do { \
72 val = le2me_32(*src++); \
73 *a++ = val << 6; \
74 *b++ = (val >> 4) & 0xFFC0; \
75 *c++ = (val >> 14) & 0xFFC0; \
76 } while (0);
77
78 for (h = 0; h < avctx->height; h++) {
79 const uint32_t *src = psrc;
80 uint32_t val;
81 for (w = 0; w < avctx->width - 5; w += 6) {
82 READ_PIXELS(u, y, v);
83 READ_PIXELS(y, u, y);
84 READ_PIXELS(v, y, u);
85 READ_PIXELS(y, v, y);
86 }
87 if (w < avctx->width - 1) {
88 READ_PIXELS(u, y, v);
89
90 val = le2me_32(*src++);
91 *y++ = val << 6;
92 }
93 if (w < avctx->width - 3) {
94 *u++ = (val >> 4) & 0xFFC0;
95 *y++ = (val >> 14) & 0xFFC0;
96
97 val = le2me_32(*src++);
98 *v++ = val << 6;
99 *y++ = (val >> 4) & 0xFFC0;
100 }
101
102 psrc += stride;
103 y += pic->linesize[0]/2 - avctx->width;
104 u += pic->linesize[1]/2 - avctx->width/2;
105 v += pic->linesize[2]/2 - avctx->width/2;
106 }
107
108 *data_size = sizeof(AVFrame);
109 *(AVFrame*)data = *avctx->coded_frame;
110
111 return avpkt->size;
112}
113
114static av_cold int decode_close(AVCodecContext *avctx)
115{
116 av_freep(&avctx->coded_frame);
117
118 return 0;
119}
120
121AVCodec v210_decoder = {
122 "v210",
123 CODEC_TYPE_VIDEO,
124 CODEC_ID_V210,
125 0,
126 decode_init,
127 NULL,
128 decode_close,
129 decode_frame,
130 CODEC_CAP_DR1,
131 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
132};