1/* 2 * g722 raw demuxer 3 * Copyright (c) 2010 Martin Storsjo 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/avassert.h" 23#include "avformat.h" 24#include "internal.h" 25#include "rawdec.h" 26 27static int g722_read_header(AVFormatContext *s) 28{ 29 AVStream *st; 30 31 st = avformat_new_stream(s, NULL); 32 if (!st) 33 return AVERROR(ENOMEM); 34 35 st->codec->codec_type = AVMEDIA_TYPE_AUDIO; 36 st->codec->codec_id = AV_CODEC_ID_ADPCM_G722; 37 st->codec->sample_rate = 16000; 38 st->codec->channels = 1; 39 40 st->codec->bits_per_coded_sample = 41 av_get_bits_per_sample(st->codec->codec_id); 42 43 av_assert0(st->codec->bits_per_coded_sample > 0); 44 45 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); 46 return 0; 47} 48 49AVInputFormat ff_g722_demuxer = { 50 .name = "g722", 51 .long_name = NULL_IF_CONFIG_SMALL("raw G.722"), 52 .read_header = g722_read_header, 53 .read_packet = ff_raw_read_partial_packet, 54 .flags = AVFMT_GENERIC_INDEX, 55 .extensions = "g722,722", 56 .raw_codec_id = AV_CODEC_ID_ADPCM_G722, 57}; 58