1/*
2 * V210 encoder
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 "bytestream.h"
26#include "internal.h"
27
28static av_cold int encode_init(AVCodecContext *avctx)
29{
30    if (avctx->width & 1) {
31        av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
32        return AVERROR(EINVAL);
33    }
34
35    if (avctx->bits_per_raw_sample != 10)
36        av_log(avctx, AV_LOG_WARNING, "bits per raw sample: %d != 10-bit\n",
37               avctx->bits_per_raw_sample);
38
39    avctx->coded_frame = av_frame_alloc();
40    if (!avctx->coded_frame)
41        return AVERROR(ENOMEM);
42
43    avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
44
45    return 0;
46}
47
48static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
49                        const AVFrame *pic, int *got_packet)
50{
51    int aligned_width = ((avctx->width + 47) / 48) * 48;
52    int stride = aligned_width * 8 / 3;
53    int line_padding = stride - ((avctx->width * 8 + 11) / 12) * 4;
54    int h, w, ret;
55    const uint16_t *y = (const uint16_t*)pic->data[0];
56    const uint16_t *u = (const uint16_t*)pic->data[1];
57    const uint16_t *v = (const uint16_t*)pic->data[2];
58    PutByteContext p;
59
60    if ((ret = ff_alloc_packet2(avctx, pkt, avctx->height * stride)) < 0)
61        return ret;
62
63    bytestream2_init_writer(&p, pkt->data, pkt->size);
64
65#define CLIP(v) av_clip(v, 4, 1019)
66
67#define WRITE_PIXELS(a, b, c)           \
68    do {                                \
69        val =   CLIP(*a++);             \
70        val |= (CLIP(*b++) << 10) |     \
71               (CLIP(*c++) << 20);      \
72        bytestream2_put_le32u(&p, val); \
73    } while (0)
74
75    for (h = 0; h < avctx->height; h++) {
76        uint32_t val;
77        for (w = 0; w < avctx->width - 5; w += 6) {
78            WRITE_PIXELS(u, y, v);
79            WRITE_PIXELS(y, u, y);
80            WRITE_PIXELS(v, y, u);
81            WRITE_PIXELS(y, v, y);
82        }
83        if (w < avctx->width - 1) {
84            WRITE_PIXELS(u, y, v);
85
86            val = CLIP(*y++);
87            if (w == avctx->width - 2)
88                bytestream2_put_le32u(&p, val);
89            if (w < avctx->width - 3) {
90                val |= (CLIP(*u++) << 10) | (CLIP(*y++) << 20);
91                bytestream2_put_le32u(&p, val);
92
93                val = CLIP(*v++) | (CLIP(*y++) << 10);
94                bytestream2_put_le32u(&p, val);
95            }
96        }
97
98        bytestream2_set_buffer(&p, 0, line_padding);
99
100        y += pic->linesize[0] / 2 - avctx->width;
101        u += pic->linesize[1] / 2 - avctx->width / 2;
102        v += pic->linesize[2] / 2 - avctx->width / 2;
103    }
104
105    pkt->flags |= AV_PKT_FLAG_KEY;
106    *got_packet = 1;
107    return 0;
108}
109
110static av_cold int encode_close(AVCodecContext *avctx)
111{
112    av_freep(&avctx->coded_frame);
113
114    return 0;
115}
116
117AVCodec ff_v210_encoder = {
118    .name           = "v210",
119    .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
120    .type           = AVMEDIA_TYPE_VIDEO,
121    .id             = AV_CODEC_ID_V210,
122    .init           = encode_init,
123    .encode2        = encode_frame,
124    .close          = encode_close,
125    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV422P10, AV_PIX_FMT_NONE },
126};
127