FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/cljrdec.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 29 32 90.6%
Branches: 9 12 75.0%

Line Branch Exec Source
1 /*
2 * Cirrus Logic AccuPak (CLJR) decoder
3 * Copyright (c) 2003 Alex Beregszaszi
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * Cirrus Logic AccuPak decoder.
25 */
26
27 #include "avcodec.h"
28 #include "get_bits.h"
29 #include "internal.h"
30
31 237 static int decode_frame(AVCodecContext *avctx,
32 void *data, int *got_frame,
33 AVPacket *avpkt)
34 {
35 237 const uint8_t *buf = avpkt->data;
36 237 int buf_size = avpkt->size;
37 GetBitContext gb;
38 237 AVFrame * const p = data;
39 int x, y, ret;
40
41
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237 if (avctx->height <= 0 || avctx->width <= 0) {
42 av_log(avctx, AV_LOG_ERROR, "Invalid width or height\n");
43 return AVERROR_INVALIDDATA;
44 }
45
46
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237 if (buf_size / avctx->height < avctx->width) {
47 1 av_log(avctx, AV_LOG_ERROR,
48 "Resolution larger than buffer size. Invalid header?\n");
49 1 return AVERROR_INVALIDDATA;
50 }
51
52
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236 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
53 return ret;
54 236 p->pict_type = AV_PICTURE_TYPE_I;
55 236 p->key_frame = 1;
56
57 236 init_get_bits(&gb, buf, buf_size * 8);
58
59
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51616 for (y = 0; y < avctx->height; y++) {
60 51380 uint8_t *luma = &p->data[0][y * p->linesize[0]];
61 51380 uint8_t *cb = &p->data[1][y * p->linesize[1]];
62 51380 uint8_t *cr = &p->data[2][y * p->linesize[2]];
63
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4257080 for (x = 0; x < avctx->width; x += 4) {
64 4205700 luma[3] = (get_bits(&gb, 5)*33) >> 2;
65 4205700 luma[2] = (get_bits(&gb, 5)*33) >> 2;
66 4205700 luma[1] = (get_bits(&gb, 5)*33) >> 2;
67 4205700 luma[0] = (get_bits(&gb, 5)*33) >> 2;
68 4205700 luma += 4;
69 4205700 *(cb++) = get_bits(&gb, 6) << 2;
70 4205700 *(cr++) = get_bits(&gb, 6) << 2;
71 }
72 }
73
74 236 *got_frame = 1;
75
76 236 return buf_size;
77 }
78
79 10 static av_cold int decode_init(AVCodecContext *avctx)
80 {
81 10 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
82 10 return 0;
83 }
84
85 const AVCodec ff_cljr_decoder = {
86 .name = "cljr",
87 .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
88 .type = AVMEDIA_TYPE_VIDEO,
89 .id = AV_CODEC_ID_CLJR,
90 .init = decode_init,
91 .decode = decode_frame,
92 .capabilities = AV_CODEC_CAP_DR1,
93 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
94 };
95
96