repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
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 "avformat.h" | |
| 23 | #include "internal.h" | |
| 24 | #include "pcm.h" | |
| 25 | ||
| 26 | static int pvf_probe(AVProbeData *p) | |
| 27 | { | |
| 28 | if (!memcmp(p->buf, "PVF1\n", 5)) | |
| 29 | return AVPROBE_SCORE_MAX; | |
| 30 | return 0; | |
| 31 | } | |
| 32 | ||
| 33 | static int pvf_read_header(AVFormatContext *s) | |
| 34 | { | |
| 35 | char buffer[32]; | |
| 36 | AVStream *st; | |
| 37 | int bps, channels, sample_rate; | |
| 38 | ||
| 39 | avio_skip(s->pb, 5); | |
| 40 | ff_get_line(s->pb, buffer, sizeof(buffer)); | |
| 41 | if (sscanf(buffer, "%d %d %d", | |
| 42 | &channels, | |
| 43 | &sample_rate, | |
| 44 | &bps) != 3) | |
| 45 | return AVERROR_INVALIDDATA; | |
| 46 | ||
| 47 | if (channels <= 0 || bps <= 0 || sample_rate <= 0) | |
| 48 | return AVERROR_INVALIDDATA; | |
| 49 | ||
| 50 | st = avformat_new_stream(s, NULL); | |
| 51 | if (!st) | |
| 52 | return AVERROR(ENOMEM); | |
| 53 | ||
| 54 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 55 | st->codec->channels = channels; | |
| 56 | st->codec->sample_rate = sample_rate; | |
| 57 | st->codec->codec_id = ff_get_pcm_codec_id(bps, 0, 1, 0xFFFF); | |
| 58 | st->codec->bits_per_coded_sample = bps; | |
| 59 | st->codec->block_align = bps * st->codec->channels / 8; | |
| 60 | ||
| 61 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); | |
| 62 | ||
| 63 | return 0; | |
| 64 | } | |
| 65 | ||
| 66 | AVInputFormat ff_pvf_demuxer = { | |
| 67 | .name = "pvf", | |
| 68 | .long_name = NULL_IF_CONFIG_SMALL("PVF (Portable Voice Format)"), | |
| 69 | .read_probe = pvf_probe, | |
| 70 | .read_header = pvf_read_header, | |
| 71 | .read_packet = ff_pcm_read_packet, | |
| 72 | .read_seek = ff_pcm_read_seek, | |
| 73 | .extensions = "pvf", | |
| 74 | .flags = AVFMT_GENERIC_INDEX, | |
| 75 | }; |