blob: c6652b9b43cd8fac17c2691e0b350072e5f5b139
| 1 | /* |
| 2 | * PVF demuxer |
| 3 | * Copyright (c) 2012 Paul B Mahol |
| 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 "libavcodec/internal.h" |
| 23 | #include "avformat.h" |
| 24 | #include "internal.h" |
| 25 | #include "pcm.h" |
| 26 | |
| 27 | static int pvf_probe(AVProbeData *p) |
| 28 | { |
| 29 | if (!memcmp(p->buf, "PVF1\n", 5)) |
| 30 | return AVPROBE_SCORE_MAX; |
| 31 | return 0; |
| 32 | } |
| 33 | |
| 34 | static int pvf_read_header(AVFormatContext *s) |
| 35 | { |
| 36 | char buffer[32]; |
| 37 | AVStream *st; |
| 38 | int bps, channels, sample_rate; |
| 39 | |
| 40 | avio_skip(s->pb, 5); |
| 41 | ff_get_line(s->pb, buffer, sizeof(buffer)); |
| 42 | if (sscanf(buffer, "%d %d %d", |
| 43 | &channels, |
| 44 | &sample_rate, |
| 45 | &bps) != 3) |
| 46 | return AVERROR_INVALIDDATA; |
| 47 | |
| 48 | if (channels <= 0 || channels > FF_SANE_NB_CHANNELS || |
| 49 | bps <= 0 || bps > INT_MAX / FF_SANE_NB_CHANNELS || sample_rate <= 0) |
| 50 | return AVERROR_INVALIDDATA; |
| 51 | |
| 52 | st = avformat_new_stream(s, NULL); |
| 53 | if (!st) |
| 54 | return AVERROR(ENOMEM); |
| 55 | |
| 56 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| 57 | st->codecpar->channels = channels; |
| 58 | st->codecpar->sample_rate = sample_rate; |
| 59 | st->codecpar->codec_id = ff_get_pcm_codec_id(bps, 0, 1, 0xFFFF); |
| 60 | st->codecpar->bits_per_coded_sample = bps; |
| 61 | st->codecpar->block_align = bps * st->codecpar->channels / 8; |
| 62 | |
| 63 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
| 64 | |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | AVInputFormat ff_pvf_demuxer = { |
| 69 | .name = "pvf", |
| 70 | .long_name = NULL_IF_CONFIG_SMALL("PVF (Portable Voice Format)"), |
| 71 | .read_probe = pvf_probe, |
| 72 | .read_header = pvf_read_header, |
| 73 | .read_packet = ff_pcm_read_packet, |
| 74 | .read_seek = ff_pcm_read_seek, |
| 75 | .extensions = "pvf", |
| 76 | .flags = AVFMT_GENERIC_INDEX, |
| 77 | }; |
| 78 |