FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/bmv.c
Date: 2024-03-28 14:59:00
Exec Total Coverage
Lines: 54 65 83.1%
Functions: 3 3 100.0%
Branches: 16 26 61.5%

Line Branch Exec Source
1 /*
2 * Discworld II BMV demuxer
3 * Copyright (c) 2011 Konstantin Shishkov
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 #include "libavutil/channel_layout.h"
23 #include "avformat.h"
24 #include "demux.h"
25 #include "internal.h"
26
27 enum BMVFlags {
28 BMV_NOP = 0,
29 BMV_END,
30 BMV_DELTA,
31 BMV_INTRA,
32
33 BMV_AUDIO = 0x20,
34 };
35
36 typedef struct BMVContext {
37 uint8_t *packet;
38 int size;
39 int get_next;
40 int64_t audio_pos;
41 } BMVContext;
42
43 2 static int bmv_read_header(AVFormatContext *s)
44 {
45 AVStream *st, *ast;
46 2 BMVContext *c = s->priv_data;
47
48 2 st = avformat_new_stream(s, 0);
49
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2 if (!st)
50 return AVERROR(ENOMEM);
51 2 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
52 2 st->codecpar->codec_id = AV_CODEC_ID_BMV_VIDEO;
53 2 st->codecpar->width = 640;
54 2 st->codecpar->height = 429;
55 2 st->codecpar->format = AV_PIX_FMT_PAL8;
56 2 avpriv_set_pts_info(st, 16, 1, 12);
57 2 ast = avformat_new_stream(s, 0);
58
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2 if (!ast)
59 return AVERROR(ENOMEM);
60 2 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
61 2 ast->codecpar->codec_id = AV_CODEC_ID_BMV_AUDIO;
62 2 ast->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
63 2 ast->codecpar->sample_rate = 22050;
64 2 avpriv_set_pts_info(ast, 16, 1, 22050);
65
66 2 c->get_next = 1;
67 2 c->audio_pos = 0;
68 2 return 0;
69 }
70
71 88 static int bmv_read_packet(AVFormatContext *s, AVPacket *pkt)
72 {
73 88 BMVContext *c = s->priv_data;
74 int type, err;
75
76
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88 while (c->get_next) {
77
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46 if (s->pb->eof_reached)
78 2 return AVERROR_EOF;
79 44 type = avio_r8(s->pb);
80
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44 if (type == BMV_NOP)
81 continue;
82
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44 if (type == BMV_END)
83 return AVERROR_EOF;
84 44 c->size = avio_rl24(s->pb);
85
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44 if (!c->size)
86 return AVERROR_INVALIDDATA;
87
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44 if ((err = av_reallocp(&c->packet, c->size + 1)) < 0)
88 return err;
89 44 c->packet[0] = type;
90
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44 if (avio_read(s->pb, c->packet + 1, c->size) != c->size)
91 2 return AVERROR(EIO);
92
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42 if (type & BMV_AUDIO) {
93 42 int audio_size = c->packet[1] * 65 + 1;
94
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42 if (audio_size >= c->size) {
95 av_log(s, AV_LOG_ERROR, "Reported audio size %d is bigger than packet size (%d)\n",
96 audio_size, c->size);
97 return AVERROR_INVALIDDATA;
98 }
99
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42 if ((err = av_new_packet(pkt, audio_size)) < 0)
100 return err;
101 42 memcpy(pkt->data, c->packet + 1, pkt->size);
102 42 pkt->stream_index = 1;
103 42 pkt->pts = c->audio_pos;
104 42 pkt->duration = c->packet[1] * 32;
105 42 c->audio_pos += pkt->duration;
106 42 c->get_next = 0;
107 42 return pkt->size;
108 } else
109 break;
110 }
111
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42 if ((err = av_new_packet(pkt, c->size + 1)) < 0)
112 return err;
113 42 pkt->stream_index = 0;
114 42 c->get_next = 1;
115 42 memcpy(pkt->data, c->packet, pkt->size);
116 42 return pkt->size;
117 }
118
119 2 static int bmv_read_close(AVFormatContext *s)
120 {
121 2 BMVContext *c = s->priv_data;
122
123 2 av_freep(&c->packet);
124
125 2 return 0;
126 }
127
128 const FFInputFormat ff_bmv_demuxer = {
129 .p.name = "bmv",
130 .p.long_name = NULL_IF_CONFIG_SMALL("Discworld II BMV"),
131 .p.extensions = "bmv",
132 .priv_data_size = sizeof(BMVContext),
133 .read_header = bmv_read_header,
134 .read_packet = bmv_read_packet,
135 .read_close = bmv_read_close,
136 };
137