3 * Copyright (c) 2010 Mohamed Naufal Basheer
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
27 #include "libavutil/attributes.h"
28 #include "libavutil/channel_layout.h"
32 static const uint8_t frame_size
[4] = { 24, 20, 4, 1 };
34 static av_cold
int g723_1_init(AVFormatContext
*s
)
38 st
= avformat_new_stream(s
, NULL
);
40 return AVERROR(ENOMEM
);
42 st
->codec
->codec_type
= AVMEDIA_TYPE_AUDIO
;
43 st
->codec
->codec_id
= AV_CODEC_ID_G723_1
;
44 st
->codec
->channel_layout
= AV_CH_LAYOUT_MONO
;
45 st
->codec
->channels
= 1;
46 st
->codec
->sample_rate
= 8000;
48 avpriv_set_pts_info(st
, 64, 1, st
->codec
->sample_rate
);
54 static int g723_1_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
58 pkt
->pos
= avio_tell(s
->pb
);
59 byte
= avio_r8(s
->pb
);
60 size
= frame_size
[byte
& 3];
62 ret
= av_new_packet(pkt
, size
);
68 pkt
->stream_index
= 0;
70 ret
= avio_read(s
->pb
, pkt
->data
+ 1, size
- 1);
73 return ret
< 0 ? ret
: AVERROR_EOF
;
79 AVInputFormat ff_g723_1_demuxer
= {
81 .long_name
= NULL_IF_CONFIG_SMALL("G.723.1"),
82 .read_header
= g723_1_init
,
83 .read_packet
= g723_1_read_packet
,
84 .extensions
= "tco,rco,g723_1",
85 .flags
= AVFMT_GENERIC_INDEX