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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 | }; |