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 "codec_internal.h"
25 #include "encode.h"
26
yuv4_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * pic,int * got_packet)27 static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
28 const AVFrame *pic, int *got_packet)
29 {
30 uint8_t *dst;
31 uint8_t *y, *u, *v;
32 int i, j, ret;
33
34 ret = ff_get_encode_buffer(avctx, pkt, 6 * (avctx->width + 1 >> 1)
35 * (avctx->height + 1 >> 1), 0);
36 if (ret < 0)
37 return ret;
38 dst = pkt->data;
39
40 y = pic->data[0];
41 u = pic->data[1];
42 v = pic->data[2];
43
44 for (i = 0; i < avctx->height + 1 >> 1; i++) {
45 for (j = 0; j < avctx->width + 1 >> 1; j++) {
46 *dst++ = u[j] ^ 0x80;
47 *dst++ = v[j] ^ 0x80;
48 *dst++ = y[ 2 * j ];
49 *dst++ = y[ 2 * j + 1];
50 *dst++ = y[pic->linesize[0] + 2 * j ];
51 *dst++ = y[pic->linesize[0] + 2 * j + 1];
52 }
53 y += 2 * pic->linesize[0];
54 u += pic->linesize[1];
55 v += pic->linesize[2];
56 }
57
58 *got_packet = 1;
59 return 0;
60 }
61
62 const FFCodec ff_yuv4_encoder = {
63 .p.name = "yuv4",
64 .p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
65 .p.type = AVMEDIA_TYPE_VIDEO,
66 .p.id = AV_CODEC_ID_YUV4,
67 .p.capabilities = AV_CODEC_CAP_DR1,
68 .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
69 FF_CODEC_ENCODE_CB(yuv4_encode_frame),
70 };
71