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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * PVF demuxer |
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| 3 | * Copyright (c) 2012 Paul B Mahol |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | #include "avformat.h" |
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| 23 | #include "internal.h" |
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| 24 | #include "pcm.h" |
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| 25 | |||
| 26 | static int pvf_probe(AVProbeData *p) |
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| 27 | { |
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| 28 | if (!memcmp(p->buf, "PVF1\n", 5)) |
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| 29 | return AVPROBE_SCORE_MAX; |
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| 30 | return 0; |
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| 31 | } |
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| 32 | |||
| 33 | static int pvf_read_header(AVFormatContext *s) |
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| 34 | { |
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| 35 | char buffer[32]; |
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| 36 | AVStream *st; |
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| 37 | int bps, channels, sample_rate; |
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| 38 | |||
| 39 | avio_skip(s->pb, 5); |
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| 40 | ff_get_line(s->pb, buffer, sizeof(buffer)); |
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| 41 | if (sscanf(buffer, "%d %d %d", |
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| 42 | &channels, |
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| 43 | &sample_rate, |
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| 44 | &bps) != 3) |
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| 45 | return AVERROR_INVALIDDATA; |
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| 46 | |||
| 47 | if (channels <= 0 || bps <= 0 || sample_rate <= 0) |
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| 48 | return AVERROR_INVALIDDATA; |
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| 49 | |||
| 50 | st = avformat_new_stream(s, NULL); |
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| 51 | if (!st) |
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| 52 | return AVERROR(ENOMEM); |
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| 53 | |||
| 54 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 55 | st->codec->channels = channels; |
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| 56 | st->codec->sample_rate = sample_rate; |
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| 57 | st->codec->codec_id = ff_get_pcm_codec_id(bps, 0, 1, 0xFFFF); |
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| 58 | st->codec->bits_per_coded_sample = bps; |
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| 59 | st->codec->block_align = bps * st->codec->channels / 8; |
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| 60 | |||
| 61 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
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| 62 | |||
| 63 | return 0; |
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| 64 | } |
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| 65 | |||
| 66 | AVInputFormat ff_pvf_demuxer = { |
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| 67 | .name = "pvf", |
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| 68 | .long_name = NULL_IF_CONFIG_SMALL("PVF (Portable Voice Format)"), |
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| 69 | .read_probe = pvf_probe, |
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| 70 | .read_header = pvf_read_header, |
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| 71 | .read_packet = ff_pcm_read_packet, |
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| 72 | .read_seek = ff_pcm_read_seek, |
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| 73 | .extensions = "pvf", |
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| 74 | .flags = AVFMT_GENERIC_INDEX, |
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| 75 | }; |