d23c590462ea5abf7be694dfa01a59238ffe9387
[libav.git] / libavcodec / v410dec.c
1 /*
2 * v410 decoder
3 *
4 * Copyright (c) 2011 Derek Buitenhuis
5 *
6 * This file is part of Libav.
7 *
8 * Libav is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * Libav is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "libavutil/intreadwrite.h"
24 #include "avcodec.h"
25
26 static av_cold int v410_decode_init(AVCodecContext *avctx)
27 {
28 avctx->pix_fmt = PIX_FMT_YUV444P10;
29 avctx->bits_per_raw_sample = 10;
30
31 if (avctx->width & 1) {
32 if (avctx->err_recognition & AV_EF_EXPLODE) {
33 av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
34 return AVERROR_INVALIDDATA;
35 } else {
36 av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");
37 }
38 }
39
40 avctx->coded_frame = avcodec_alloc_frame();
41
42 if (!avctx->coded_frame) {
43 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
44 return AVERROR(ENOMEM);
45 }
46
47 return 0;
48 }
49
50 static int v410_decode_frame(AVCodecContext *avctx, void *data,
51 int *data_size, AVPacket *avpkt)
52 {
53 AVFrame *pic = avctx->coded_frame;
54 uint8_t *src = avpkt->data;
55 uint16_t *y, *u, *v;
56 uint32_t val;
57 int i, j;
58
59 if (pic->data[0])
60 avctx->release_buffer(avctx, pic);
61
62 if (avpkt->size < 4 * avctx->height * avctx->width) {
63 av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
64 return AVERROR(EINVAL);
65 }
66
67 pic->reference = 0;
68
69 if (avctx->get_buffer(avctx, pic) < 0) {
70 av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
71 return AVERROR(ENOMEM);
72 }
73
74 pic->key_frame = 1;
75 pic->pict_type = AV_PICTURE_TYPE_I;
76
77 y = (uint16_t *)pic->data[0];
78 u = (uint16_t *)pic->data[1];
79 v = (uint16_t *)pic->data[2];
80
81 for (i = 0; i < avctx->height; i++) {
82 for (j = 0; j < avctx->width; j++) {
83 val = AV_RL32(src);
84
85 u[j] = (val >> 2) & 0x3FF;
86 y[j] = (val >> 12) & 0x3FF;
87 v[j] = (val >> 22);
88
89 src += 4;
90 }
91
92 y += pic->linesize[0] >> 1;
93 u += pic->linesize[1] >> 1;
94 v += pic->linesize[2] >> 1;
95 }
96
97 *data_size = sizeof(AVFrame);
98 *(AVFrame *)data = *pic;
99
100 return avpkt->size;
101 }
102
103 static av_cold int v410_decode_close(AVCodecContext *avctx)
104 {
105 if (avctx->coded_frame->data[0])
106 avctx->release_buffer(avctx, avctx->coded_frame);
107
108 av_freep(&avctx->coded_frame);
109
110 return 0;
111 }
112
113 AVCodec ff_v410_decoder = {
114 .name = "v410",
115 .type = AVMEDIA_TYPE_VIDEO,
116 .id = AV_CODEC_ID_V410,
117 .init = v410_decode_init,
118 .decode = v410_decode_frame,
119 .close = v410_decode_close,
120 .capabilities = CODEC_CAP_DR1,
121 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
122 };