/*
  * PVF demuxer
  * Copyright (c) 2012 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 "avformat.h"
 #include "internal.h"
 #include "pcm.h"
 
 static int pvf_probe(AVProbeData *p)
 {
     if (!memcmp(p->buf, "PVF1\n", 5))
         return AVPROBE_SCORE_MAX;
     return 0;
 }
 
 static int pvf_read_header(AVFormatContext *s)
 {
     char buffer[32];
     AVStream *st;
     int bps, channels, sample_rate;
 
     avio_skip(s->pb, 5);

     ff_get_line(s->pb, buffer, sizeof(buffer));

     if (sscanf(buffer, "%d %d %d",
                &channels,
                &sample_rate,
                &bps) != 3)
         return AVERROR_INVALIDDATA;
 
     if (channels <= 0 || bps <= 0 || sample_rate <= 0)
         return AVERROR_INVALIDDATA;
 
     st = avformat_new_stream(s, NULL);
     if (!st)
         return AVERROR(ENOMEM);
 
     st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
     st->codec->channels    = channels;
     st->codec->sample_rate = sample_rate;
     st->codec->codec_id    = ff_get_pcm_codec_id(bps, 0, 1, 0xFFFF);
     st->codec->bits_per_coded_sample = bps;
     st->codec->block_align = bps * st->codec->channels / 8;
 
     avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
 
     return 0;
 }
 
 AVInputFormat ff_pvf_demuxer = {
     .name           = "pvf",
     .long_name      = NULL_IF_CONFIG_SMALL("PVF (Portable Voice Format)"),
     .read_probe     = pvf_probe,
     .read_header    = pvf_read_header,

     .read_packet    = ff_pcm_read_packet,

     .read_seek      = ff_pcm_read_seek,
     .extensions     = "pvf",
     .flags          = AVFMT_GENERIC_INDEX,
 };