FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/y41pdec.c
Date: 2022-12-05 03:11:11
Exec Total Coverage
Lines: 30 34 88.2%
Functions: 2 2 100.0%
Branches: 7 10 70.0%

Line Branch Exec Source
1 /*
2 * y41p decoder
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 "decode.h"
26
27 6 static av_cold int y41p_decode_init(AVCodecContext *avctx)
28 {
29 6 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
30 6 avctx->bits_per_raw_sample = 12;
31
32
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6 if (avctx->width & 7) {
33 av_log(avctx, AV_LOG_WARNING, "y41p requires width to be divisible by 8.\n");
34 }
35
36 6 return 0;
37 }
38
39 150 static int y41p_decode_frame(AVCodecContext *avctx, AVFrame *pic,
40 int *got_frame, AVPacket *avpkt)
41 {
42 150 const uint8_t *src = avpkt->data;
43 uint8_t *y, *u, *v;
44 int i, j, ret;
45
46
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150 if (avpkt->size < 3LL * avctx->height * FFALIGN(avctx->width, 8) / 2) {
47 av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
48 return AVERROR(EINVAL);
49 }
50
51
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150 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
52 return ret;
53
54 150 pic->key_frame = 1;
55 150 pic->pict_type = AV_PICTURE_TYPE_I;
56
57
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43350 for (i = avctx->height - 1; i >= 0 ; i--) {
58 43200 y = &pic->data[0][i * pic->linesize[0]];
59 43200 u = &pic->data[1][i * pic->linesize[1]];
60 43200 v = &pic->data[2][i * pic->linesize[2]];
61
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1944000 for (j = 0; j < avctx->width; j += 8) {
62 1900800 *(u++) = *src++;
63 1900800 *(y++) = *src++;
64 1900800 *(v++) = *src++;
65 1900800 *(y++) = *src++;
66
67 1900800 *(u++) = *src++;
68 1900800 *(y++) = *src++;
69 1900800 *(v++) = *src++;
70 1900800 *(y++) = *src++;
71
72 1900800 *(y++) = *src++;
73 1900800 *(y++) = *src++;
74 1900800 *(y++) = *src++;
75 1900800 *(y++) = *src++;
76 }
77 }
78
79 150 *got_frame = 1;
80
81 150 return avpkt->size;
82 }
83
84 const FFCodec ff_y41p_decoder = {
85 .p.name = "y41p",
86 CODEC_LONG_NAME("Uncompressed YUV 4:1:1 12-bit"),
87 .p.type = AVMEDIA_TYPE_VIDEO,
88 .p.id = AV_CODEC_ID_Y41P,
89 .init = y41p_decode_init,
90 FF_CODEC_DECODE_CB(y41p_decode_frame),
91 .p.capabilities = AV_CODEC_CAP_DR1,
92 };
93