FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/sp5xdec.c
Date: 2021-09-23 20:34:37
Exec Total Coverage
Lines: 36 38 94.7%
Branches: 13 18 72.2%

Line Branch Exec Source
1 /*
2 * Sunplus JPEG decoder (SP5X)
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 * Sunplus JPEG decoder (SP5X).
25 */
26
27 #include "avcodec.h"
28 #include "internal.h"
29 #include "mjpeg.h"
30 #include "mjpegdec.h"
31 #include "sp5x.h"
32
33 378 int ff_sp5x_process_packet(AVCodecContext *avctx, AVPacket *avpkt)
34 {
35 378 const uint8_t *buf = avpkt->data;
36 378 int buf_size = avpkt->size;
37 AVBufferRef *buf_recoded;
38 uint8_t *recoded;
39 378 int i = 0, j = 0;
40
41
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378 if (!avctx->width || !avctx->height)
42 return -1;
43
44 378 buf_recoded = av_buffer_allocz(buf_size + 1024);
45
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378 if (!buf_recoded)
46 return -1;
47 378 recoded = buf_recoded->data;
48
49 /* SOI */
50 378 recoded[j++] = 0xFF;
51 378 recoded[j++] = 0xD8;
52
53 378 memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
54 378 memcpy(recoded + j + 5, &sp5x_qscale_five_quant_table[0], 64);
55 378 memcpy(recoded + j + 70, &sp5x_qscale_five_quant_table[1], 64);
56 378 j += sizeof(sp5x_data_dqt);
57
58 378 memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
59 378 j += sizeof(sp5x_data_dht);
60
61 378 memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
62 378 AV_WB16(recoded+j+5, avctx->coded_height);
63 378 AV_WB16(recoded+j+7, avctx->coded_width);
64 378 j += sizeof(sp5x_data_sof);
65
66 378 memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
67 378 j += sizeof(sp5x_data_sos);
68
69
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378 if(avctx->codec_id==AV_CODEC_ID_AMV)
70
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3659228 for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++)
71 3658861 recoded[j++] = buf[i];
72 else
73
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39435 for (i = 14; i < buf_size && j < buf_size+1024-3; i++)
74 {
75 39424 recoded[j++] = buf[i];
76
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39424 if (buf[i] == 0xff)
77 93 recoded[j++] = 0;
78 }
79
80 /* EOI */
81 378 recoded[j++] = 0xFF;
82 378 recoded[j++] = 0xD9;
83
84 378 av_buffer_unref(&avpkt->buf);
85 378 avpkt->buf = buf_recoded;
86 378 avpkt->data = recoded;
87 378 avpkt->size = j;
88
89 378 return 0;
90 }
91
92 #if CONFIG_SP5X_DECODER
93 const AVCodec ff_sp5x_decoder = {
94 .name = "sp5x",
95 .long_name = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"),
96 .type = AVMEDIA_TYPE_VIDEO,
97 .id = AV_CODEC_ID_SP5X,
98 .priv_data_size = sizeof(MJpegDecodeContext),
99 .init = ff_mjpeg_decode_init,
100 .close = ff_mjpeg_decode_end,
101 .receive_frame = ff_mjpeg_receive_frame,
102 .capabilities = AV_CODEC_CAP_DR1,
103 .max_lowres = 3,
104 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
105 FF_CODEC_CAP_SETS_PKT_DTS,
106 };
107 #endif
108 #if CONFIG_AMV_DECODER
109 const AVCodec ff_amv_decoder = {
110 .name = "amv",
111 .long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
112 .type = AVMEDIA_TYPE_VIDEO,
113 .id = AV_CODEC_ID_AMV,
114 .priv_data_size = sizeof(MJpegDecodeContext),
115 .init = ff_mjpeg_decode_init,
116 .close = ff_mjpeg_decode_end,
117 .receive_frame = ff_mjpeg_receive_frame,
118 .max_lowres = 3,
119 .capabilities = AV_CODEC_CAP_DR1,
120 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
121 FF_CODEC_CAP_SETS_PKT_DTS,
122 };
123 #endif
124