1/*
2 * v410 encoder
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
26static av_cold int v410_encode_init(AVCodecContext *avctx)
27{
28    if (avctx->width & 1) {
29        av_log(avctx, AV_LOG_ERROR, "v410 requires even width.\n");
30        return AVERROR_INVALIDDATA;
31    }
32
33    avctx->coded_frame = avcodec_alloc_frame();
34
35    if (!avctx->coded_frame) {
36        av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
37        return AVERROR(ENOMEM);
38    }
39
40    return 0;
41}
42
43static int v410_encode_frame(AVCodecContext *avctx, uint8_t *buf,
44                             int buf_size, void *data)
45{
46    AVFrame *pic = data;
47    uint8_t *dst = buf;
48    uint16_t *y, *u, *v;
49    uint32_t val;
50    int i, j;
51    int output_size = 0;
52
53    if (buf_size < avctx->width * avctx->height * 4) {
54        av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n");
55        return AVERROR(ENOMEM);
56    }
57
58    avctx->coded_frame->reference = 0;
59    avctx->coded_frame->key_frame = 1;
60    avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
61
62    y = (uint16_t *)pic->data[0];
63    u = (uint16_t *)pic->data[1];
64    v = (uint16_t *)pic->data[2];
65
66    for (i = 0; i < avctx->height; i++) {
67        for (j = 0; j < avctx->width; j++) {
68            val  = u[j] << 2;
69            val |= y[j] << 12;
70            val |= (uint32_t) v[j] << 22;
71            AV_WL32(dst, val);
72            dst += 4;
73            output_size += 4;
74        }
75        y += pic->linesize[0] >> 1;
76        u += pic->linesize[1] >> 1;
77        v += pic->linesize[2] >> 1;
78    }
79
80    return output_size;
81}
82
83static av_cold int v410_encode_close(AVCodecContext *avctx)
84{
85    av_freep(&avctx->coded_frame);
86
87    return 0;
88}
89
90AVCodec ff_v410_encoder = {
91    .name         = "v410",
92    .type         = AVMEDIA_TYPE_VIDEO,
93    .id           = CODEC_ID_V410,
94    .init         = v410_encode_init,
95    .encode       = v410_encode_frame,
96    .close        = v410_encode_close,
97    .pix_fmts     = (const enum PixelFormat[]){ PIX_FMT_YUV444P10, PIX_FMT_NONE },
98    .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
99};
100