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
30 static const uint8_t frame_size[4] = {24, 20, 4, 1};
32 static int g723_1_init(AVFormatContext *s)
36 st = avformat_new_stream(s, NULL);
38 return AVERROR(ENOMEM);
40 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
41 st->codec->codec_id = CODEC_ID_G723_1;
42 st->codec->channels = 1;
43 st->codec->sample_rate = 8000;
45 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
50 static int g723_1_read_packet(AVFormatContext *s, AVPacket *pkt)
54 pkt->pos = avio_tell(s->pb);
55 byte = avio_r8(s->pb);
56 size = frame_size[byte & 3];
58 ret = av_new_packet(pkt, size);
64 pkt->stream_index = 0;
66 ret = avio_read(s->pb, pkt->data + 1, size - 1);
69 return ret < 0 ? ret : AVERROR_EOF;
75 AVInputFormat ff_g723_1_demuxer = {
77 .long_name = NULL_IF_CONFIG_SMALL("G.723.1 format"),
78 .read_header = g723_1_init,
79 .read_packet = g723_1_read_packet,
80 .extensions = "tco,rco",
81 .flags = AVFMT_GENERIC_INDEX