3 * Copyright Konstantin Shishkov.
5 * This file is part of FFmpeg.
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.
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.
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
23 * Based on documents from Game Audio Player and own research
27 #include "allformats.h"
31 /* if we don't know the size in advance */
32 #define AU_UNKOWN_SIZE ((uint32_t)(~0))
34 static int sol_probe(AVProbeData *p)
36 /* check file header */
38 if (p->buf_size <= 14)
40 magic=le2me_16(*((uint16_t*)p->buf));
41 if ((magic == 0x0B8D || magic == 0x0C0D || magic == 0x0C8D) &&
42 p->buf[2] == 'S' && p->buf[3] == 'O' &&
43 p->buf[4] == 'L' && p->buf[5] == 0)
44 return AVPROBE_SCORE_MAX;
53 static int sol_codec_id(int magic, int type)
57 if (type & SOL_DPCM) return CODEC_ID_SOL_DPCM;
58 else return CODEC_ID_PCM_U8;
62 if (type & SOL_16BIT) return CODEC_ID_SOL_DPCM;
63 else if (magic == 0x0C8D) return CODEC_ID_SOL_DPCM;
64 else return CODEC_ID_SOL_DPCM;
66 if (type & SOL_16BIT) return CODEC_ID_PCM_S16LE;
67 return CODEC_ID_PCM_U8;
70 static int sol_codec_type(int magic, int type)
72 if (magic == 0x0B8D) return 1;//SOL_DPCM_OLD;
75 if (type & SOL_16BIT) return 3;//SOL_DPCM_NEW16;
76 else if (magic == 0x0C8D) return 1;//SOL_DPCM_OLD;
77 else return 2;//SOL_DPCM_NEW8;
82 static int sol_channels(int magic, int type)
84 if (magic == 0x0B8D || !(type & SOL_STEREO)) return 1;
88 static int sol_read_header(AVFormatContext *s,
89 AVFormatParameters *ap)
92 unsigned int magic,tag;
93 ByteIOContext *pb = &s->pb;
94 unsigned int id, codec, channels, rate, type;
97 /* check ".snd" header */
100 if (tag != MKTAG('S', 'O', 'L', 0))
106 get_byte(pb); /* newer SOLs contain padding byte */
108 codec = sol_codec_id(magic, type);
109 channels = sol_channels(magic, type);
111 if (codec == CODEC_ID_SOL_DPCM)
112 id = sol_codec_type(magic, type);
115 /* now we are ready: build format streams */
116 st = av_new_stream(s, 0);
119 st->codec->codec_type = CODEC_TYPE_AUDIO;
120 st->codec->codec_tag = id;
121 st->codec->codec_id = codec;
122 st->codec->channels = channels;
123 st->codec->sample_rate = rate;
124 av_set_pts_info(st, 64, 1, rate);
128 #define MAX_SIZE 4096
130 static int sol_read_packet(AVFormatContext *s,
135 if (url_feof(&s->pb))
137 ret= av_get_packet(&s->pb, pkt, MAX_SIZE);
138 pkt->stream_index = 0;
140 /* note: we need to modify the packet size here to handle the last
146 static int sol_read_close(AVFormatContext *s)
151 AVInputFormat sol_demuxer = {