Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavcodec / y41penc.c
1 /*
2 * y41p encoder
3 *
4 * Copyright (c) 2012 Paul B Mahol
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 y41p_encode_init(AVCodecContext *avctx)
27 {
28 if (avctx->width & 7) {
29 av_log(avctx, AV_LOG_ERROR, "y41p requires width to be divisible by 8.\n");
30 return AVERROR_INVALIDDATA;
31 }
32
33 avctx->coded_frame = av_frame_alloc();
34 avctx->bits_per_coded_sample = 12;
35
36 if (!avctx->coded_frame) {
37 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
38 return AVERROR(ENOMEM);
39 }
40
41 return 0;
42 }
43
44 static int y41p_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
45 const AVFrame *pic, int *got_packet)
46 {
47 uint8_t *dst;
48 uint8_t *y, *u, *v;
49 int i, j, ret;
50
51 if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * 1.5)) < 0)
52 return ret;
53
54 avctx->coded_frame->key_frame = 1;
55 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
56 dst = pkt->data;
57
58 for (i = avctx->height - 1; i >= 0; i--) {
59 y = &pic->data[0][i * pic->linesize[0]];
60 u = &pic->data[1][i * pic->linesize[1]];
61 v = &pic->data[2][i * pic->linesize[2]];
62 for (j = 0; j < avctx->width; j += 8) {
63 *(dst++) = *(u++);
64 *(dst++) = *(y++);
65 *(dst++) = *(v++);
66 *(dst++) = *(y++);
67
68 *(dst++) = *(u++);
69 *(dst++) = *(y++);
70 *(dst++) = *(v++);
71 *(dst++) = *(y++);
72
73 *(dst++) = *(y++);
74 *(dst++) = *(y++);
75 *(dst++) = *(y++);
76 *(dst++) = *(y++);
77 }
78 }
79
80 pkt->flags |= AV_PKT_FLAG_KEY;
81 *got_packet = 1;
82 return 0;
83 }
84
85 static av_cold int y41p_encode_close(AVCodecContext *avctx)
86 {
87 av_freep(&avctx->coded_frame);
88
89 return 0;
90 }
91
92 AVCodec ff_y41p_encoder = {
93 .name = "y41p",
94 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
95 .type = AVMEDIA_TYPE_VIDEO,
96 .id = AV_CODEC_ID_Y41P,
97 .init = y41p_encode_init,
98 .encode2 = y41p_encode_frame,
99 .close = y41p_encode_close,
100 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
101 AV_PIX_FMT_NONE },
102 };