FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/yuv4dec.c
Date: 2024-07-16 12:46:59
Exec Total Coverage
Lines: 23 26 88.5%
Functions: 2 2 100.0%
Branches: 6 8 75.0%

Line Branch Exec Source
1 /*
2 * libquicktime yuv4 decoder
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 "codec_internal.h"
25 #include "decode.h"
26
27 8 static av_cold int yuv4_decode_init(AVCodecContext *avctx)
28 {
29 8 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
30
31 8 return 0;
32 }
33
34 200 static int yuv4_decode_frame(AVCodecContext *avctx, AVFrame *pic,
35 int *got_frame, AVPacket *avpkt)
36 {
37 200 const uint8_t *src = avpkt->data;
38 uint8_t *y, *u, *v;
39 int i, j, ret;
40
41
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200 if (avpkt->size < 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1)) {
42 av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
43 return AVERROR(EINVAL);
44 }
45
46
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200 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
47 return ret;
48
49 200 y = pic->data[0];
50 200 u = pic->data[1];
51 200 v = pic->data[2];
52
53
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22650 for (i = 0; i < (avctx->height + 1) >> 1; i++) {
54
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3838500 for (j = 0; j < (avctx->width + 1) >> 1; j++) {
55 3816050 u[j] = *src++ ^ 0x80;
56 3816050 v[j] = *src++ ^ 0x80;
57 3816050 y[ 2 * j ] = *src++;
58 3816050 y[ 2 * j + 1] = *src++;
59 3816050 y[pic->linesize[0] + 2 * j ] = *src++;
60 3816050 y[pic->linesize[0] + 2 * j + 1] = *src++;
61 }
62
63 22450 y += 2 * pic->linesize[0];
64 22450 u += pic->linesize[1];
65 22450 v += pic->linesize[2];
66 }
67
68 200 *got_frame = 1;
69
70 200 return avpkt->size;
71 }
72
73 const FFCodec ff_yuv4_decoder = {
74 .p.name = "yuv4",
75 CODEC_LONG_NAME("Uncompressed packed 4:2:0"),
76 .p.type = AVMEDIA_TYPE_VIDEO,
77 .p.id = AV_CODEC_ID_YUV4,
78 .init = yuv4_decode_init,
79 FF_CODEC_DECODE_CB(yuv4_decode_frame),
80 .p.capabilities = AV_CODEC_CAP_DR1,
81 };
82