3 * Copyright (c) 2013 James Almer
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
22 #include "libavutil/channel_layout.h"
23 #include "libavutil/intreadwrite.h"
27 static int adp_probe(AVProbeData
*p
)
35 for (i
= 0; i
< p
->buf_size
- 3; i
+=32) {
36 if (p
->buf
[i
] != p
->buf
[i
+2] || p
->buf
[i
+1] != p
->buf
[i
+3])
38 if (p
->buf
[i
] != last
)
45 return p
->buf_size
< 260 ? 1 : AVPROBE_SCORE_MAX
/ 4;
48 static int adp_read_header(AVFormatContext
*s
)
52 st
= avformat_new_stream(s
, NULL
);
54 return AVERROR(ENOMEM
);
56 st
->codec
->codec_type
= AVMEDIA_TYPE_AUDIO
;
57 st
->codec
->codec_id
= AV_CODEC_ID_ADPCM_DTK
;
58 st
->codec
->channel_layout
= AV_CH_LAYOUT_STEREO
;
59 st
->codec
->channels
= 2;
60 st
->codec
->sample_rate
= 48000;
63 st
->duration
= av_get_audio_frame_duration(st
->codec
, avio_size(s
->pb
));
65 avpriv_set_pts_info(st
, 64, 1, st
->codec
->sample_rate
);
70 static int adp_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
77 ret
= av_get_packet(s
->pb
, pkt
, size
);
84 av_shrink_packet(pkt
, ret
);
86 pkt
->stream_index
= 0;
91 AVInputFormat ff_adp_demuxer
= {
93 .long_name
= NULL_IF_CONFIG_SMALL("ADP"),
94 .read_probe
= adp_probe
,
95 .read_header
= adp_read_header
,
96 .read_packet
= adp_read_packet
,
97 .extensions
= "adp,dtk",