1 /*
2 * libquicktime yuv4 encoder
3 *
4 * Copyright (c) 2011 Carl Eugen Hoyos
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "avcodec.h"
24 #include "internal.h"
25
yuv4_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * pic,int * got_packet)26 static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
27 const AVFrame *pic, int *got_packet)
28 {
29 uint8_t *dst;
30 uint8_t *y, *u, *v;
31 int i, j, ret;
32
33 if ((ret = ff_alloc_packet2(avctx, pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1), 0)) < 0)
34 return ret;
35 dst = pkt->data;
36
37 y = pic->data[0];
38 u = pic->data[1];
39 v = pic->data[2];
40
41 for (i = 0; i < avctx->height + 1 >> 1; i++) {
42 for (j = 0; j < avctx->width + 1 >> 1; j++) {
43 *dst++ = u[j] ^ 0x80;
44 *dst++ = v[j] ^ 0x80;
45 *dst++ = y[ 2 * j ];
46 *dst++ = y[ 2 * j + 1];
47 *dst++ = y[pic->linesize[0] + 2 * j ];
48 *dst++ = y[pic->linesize[0] + 2 * j + 1];
49 }
50 y += 2 * pic->linesize[0];
51 u += pic->linesize[1];
52 v += pic->linesize[2];
53 }
54
55 pkt->flags |= AV_PKT_FLAG_KEY;
56 *got_packet = 1;
57 return 0;
58 }
59
60 AVCodec ff_yuv4_encoder = {
61 .name = "yuv4",
62 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
63 .type = AVMEDIA_TYPE_VIDEO,
64 .id = AV_CODEC_ID_YUV4,
65 .encode2 = yuv4_encode_frame,
66 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
67 };
68