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 "codec_internal.h"
25 #include "encode.h"
26 #include "internal.h"
27
y41p_encode_init(AVCodecContext * avctx)28 static av_cold int y41p_encode_init(AVCodecContext *avctx)
29 {
30 if (avctx->width & 7) {
31 av_log(avctx, AV_LOG_ERROR, "y41p requires width to be divisible by 8.\n");
32 return AVERROR_INVALIDDATA;
33 }
34
35 avctx->bits_per_coded_sample = 12;
36 avctx->bit_rate = ff_guess_coded_bitrate(avctx);
37
38 return 0;
39 }
40
y41p_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * pic,int * got_packet)41 static int y41p_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
42 const AVFrame *pic, int *got_packet)
43 {
44 uint8_t *dst;
45 uint8_t *y, *u, *v;
46 int i, j, ret;
47
48 ret = ff_get_encode_buffer(avctx, pkt, avctx->width * avctx->height * 1.5, 0);
49 if (ret < 0)
50 return ret;
51
52 dst = pkt->data;
53
54 for (i = avctx->height - 1; i >= 0; i--) {
55 y = &pic->data[0][i * pic->linesize[0]];
56 u = &pic->data[1][i * pic->linesize[1]];
57 v = &pic->data[2][i * pic->linesize[2]];
58 for (j = 0; j < avctx->width; j += 8) {
59 *(dst++) = *(u++);
60 *(dst++) = *(y++);
61 *(dst++) = *(v++);
62 *(dst++) = *(y++);
63
64 *(dst++) = *(u++);
65 *(dst++) = *(y++);
66 *(dst++) = *(v++);
67 *(dst++) = *(y++);
68
69 *(dst++) = *(y++);
70 *(dst++) = *(y++);
71 *(dst++) = *(y++);
72 *(dst++) = *(y++);
73 }
74 }
75
76 *got_packet = 1;
77 return 0;
78 }
79
80 const FFCodec ff_y41p_encoder = {
81 .p.name = "y41p",
82 .p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
83 .p.type = AVMEDIA_TYPE_VIDEO,
84 .p.id = AV_CODEC_ID_Y41P,
85 .p.capabilities = AV_CODEC_CAP_DR1,
86 .init = y41p_encode_init,
87 FF_CODEC_ENCODE_CB(y41p_encode_frame),
88 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
89 AV_PIX_FMT_NONE },
90 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
91 };
92