/* * ACM demuxer * Copyright (c) 2015 Paul B Mahol * * 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 "libavutil/intreadwrite.h"#include "avformat.h"#include "demux.h"#include "rawdec.h"#include "internal.h" static int acm_probe(const AVProbeData *p){    if (AV_RB32(p->buf) != 0x97280301)        return 0;     return AVPROBE_SCORE_MAX / 3 * 2;} static int acm_read_header(AVFormatContext *s){    AVStream *st;    int ret;     st = avformat_new_stream(s, NULL);    if (!st)        return AVERROR(ENOMEM);     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;    st->codecpar->codec_id   = AV_CODEC_ID_INTERPLAY_ACM;     ret = ff_get_extradata(s, st->codecpar, s->pb, 14);    if (ret < 0)        return ret;     st->codecpar->ch_layout.nb_channels = AV_RL16(st->codecpar->extradata +  8);    st->codecpar->sample_rate = AV_RL16(st->codecpar->extradata + 10);    if (st->codecpar->ch_layout.nb_channels <= 0 || st->codecpar->sample_rate <= 0)        return AVERROR_INVALIDDATA;    st->start_time         = 0;    st->duration           = AV_RL32(st->codecpar->extradata +  4) / st->codecpar->ch_layout.nb_channels;    ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;    avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);     return 0;} const FFInputFormat ff_acm_demuxer = {    .p.name         = "acm",    .p.long_name    = NULL_IF_CONFIG_SMALL("Interplay ACM"),    .p.flags        = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS,    .p.extensions   = "acm",    .p.priv_class   = &ff_raw_demuxer_class,    .read_probe     = acm_probe,    .read_header    = acm_read_header,    .read_packet    = ff_raw_read_partial_packet,    .raw_codec_id   = AV_CODEC_ID_INTERPLAY_ACM,    .priv_data_size = sizeof(FFRawDemuxerContext),};