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
y41p_encode_init(AVCodecContext * avctx)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->bits_per_coded_sample = 12;
34 avctx->bit_rate = ff_guess_coded_bitrate(avctx);
35
36 return 0;
37 }
38
y41p_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * pic,int * got_packet)39 static int y41p_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
40 const AVFrame *pic, int *got_packet)
41 {
42 uint8_t *dst;
43 uint8_t *y, *u, *v;
44 int i, j, ret;
45
46 if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * 1.5, 0)) < 0)
47 return ret;
48
49 dst = pkt->data;
50
51 for (i = avctx->height - 1; i >= 0; i--) {
52 y = &pic->data[0][i * pic->linesize[0]];
53 u = &pic->data[1][i * pic->linesize[1]];
54 v = &pic->data[2][i * pic->linesize[2]];
55 for (j = 0; j < avctx->width; j += 8) {
56 *(dst++) = *(u++);
57 *(dst++) = *(y++);
58 *(dst++) = *(v++);
59 *(dst++) = *(y++);
60
61 *(dst++) = *(u++);
62 *(dst++) = *(y++);
63 *(dst++) = *(v++);
64 *(dst++) = *(y++);
65
66 *(dst++) = *(y++);
67 *(dst++) = *(y++);
68 *(dst++) = *(y++);
69 *(dst++) = *(y++);
70 }
71 }
72
73 pkt->flags |= AV_PKT_FLAG_KEY;
74 *got_packet = 1;
75 return 0;
76 }
77
78 AVCodec ff_y41p_encoder = {
79 .name = "y41p",
80 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
81 .type = AVMEDIA_TYPE_VIDEO,
82 .id = AV_CODEC_ID_Y41P,
83 .init = y41p_encode_init,
84 .encode2 = y41p_encode_frame,
85 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
86 AV_PIX_FMT_NONE },
87 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
88 };
89