/*

 * G.728 raw demuxer

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "avformat.h"

#include "demux.h"

#include "internal.h"

static int g728_read_header(AVFormatContext *s)

{

    AVStream *st = avformat_new_stream(s, NULL);

    if (!st)

        return AVERROR(ENOMEM);

    st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;

    st->codecpar->codec_id    = ffifmt(s->iformat)->raw_codec_id;

    st->codecpar->sample_rate = 8000;

    st->codecpar->bit_rate    = 16000;

    st->codecpar->block_align = 5;

    st->codecpar->ch_layout   = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;

    avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);

    return 0;

}

static int g728_read_packet(AVFormatContext *s, AVPacket *pkt)

{

    int ret = av_get_packet(s->pb, pkt, 1020); // a size similar to RAW_PACKET_SIZE divisible by 5

    pkt->flags &= ~AV_PKT_FLAG_CORRUPT;

    pkt->duration = (pkt->size / 5) * 20;

    return ret;

}

const FFInputFormat ff_g728_demuxer = {

    .p.name         = "g728",

    .p.long_name    = NULL_IF_CONFIG_SMALL("raw G.728"),

    .p.extensions   = "g728",

    .p.flags        = AVFMT_GENERIC_INDEX,

    .read_header    = g728_read_header,

    .read_packet    = g728_read_packet,

    .raw_codec_id   = AV_CODEC_ID_G728,

};