| /* |
| * 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, |
| }; |
