Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / yuv4enc.c
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
26 static av_cold int yuv4_encode_init(AVCodecContext *avctx)
27 {
28 avctx->coded_frame = av_frame_alloc();
29
30 if (!avctx->coded_frame) {
31 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
32 return AVERROR(ENOMEM);
33 }
34
35 return 0;
36 }
37
38 static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
39 const AVFrame *pic, int *got_packet)
40 {
41 uint8_t *dst;
42 uint8_t *y, *u, *v;
43 int i, j, ret;
44
45 if ((ret = ff_alloc_packet2(avctx, pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1))) < 0)
46 return ret;
47 dst = pkt->data;
48
49 avctx->coded_frame->key_frame = 1;
50 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
51
52 y = pic->data[0];
53 u = pic->data[1];
54 v = pic->data[2];
55
56 for (i = 0; i < avctx->height + 1 >> 1; i++) {
57 for (j = 0; j < avctx->width + 1 >> 1; j++) {
58 *dst++ = u[j] ^ 0x80;
59 *dst++ = v[j] ^ 0x80;
60 *dst++ = y[ 2 * j ];
61 *dst++ = y[ 2 * j + 1];
62 *dst++ = y[pic->linesize[0] + 2 * j ];
63 *dst++ = y[pic->linesize[0] + 2 * j + 1];
64 }
65 y += 2 * pic->linesize[0];
66 u += pic->linesize[1];
67 v += pic->linesize[2];
68 }
69
70 pkt->flags |= AV_PKT_FLAG_KEY;
71 *got_packet = 1;
72 return 0;
73 }
74
75 static av_cold int yuv4_encode_close(AVCodecContext *avctx)
76 {
77 av_freep(&avctx->coded_frame);
78
79 return 0;
80 }
81
82 AVCodec ff_yuv4_encoder = {
83 .name = "yuv4",
84 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"),
85 .type = AVMEDIA_TYPE_VIDEO,
86 .id = AV_CODEC_ID_YUV4,
87 .init = yuv4_encode_init,
88 .encode2 = yuv4_encode_frame,
89 .close = yuv4_encode_close,
90 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
91 };