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2ba45a60 DM |
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 | }; |