| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 "demux.h" | ||
| 25 | #include "internal.h" | ||
| 26 | #include "pcm.h" | ||
| 27 | |||
| 28 | 7186 | static int pvf_probe(const AVProbeData *p) | |
| 29 | { | ||
| 30 |
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7186 | if (!memcmp(p->buf, "PVF1\n", 5)) |
| 31 | ✗ | return AVPROBE_SCORE_MAX; | |
| 32 | 7186 | return 0; | |
| 33 | } | ||
| 34 | |||
| 35 | ✗ | static int pvf_read_header(AVFormatContext *s) | |
| 36 | { | ||
| 37 | char buffer[32]; | ||
| 38 | AVStream *st; | ||
| 39 | int bps, channels, sample_rate; | ||
| 40 | |||
| 41 | ✗ | avio_skip(s->pb, 5); | |
| 42 | ✗ | ff_get_line(s->pb, buffer, sizeof(buffer)); | |
| 43 | ✗ | if (sscanf(buffer, "%d %d %d", | |
| 44 | &channels, | ||
| 45 | &sample_rate, | ||
| 46 | &bps) != 3) | ||
| 47 | ✗ | return AVERROR_INVALIDDATA; | |
| 48 | |||
| 49 | ✗ | if (channels <= 0 || channels > FF_SANE_NB_CHANNELS || | |
| 50 | ✗ | bps <= 0 || bps > INT_MAX / FF_SANE_NB_CHANNELS || sample_rate <= 0) | |
| 51 | ✗ | return AVERROR_INVALIDDATA; | |
| 52 | |||
| 53 | ✗ | st = avformat_new_stream(s, NULL); | |
| 54 | ✗ | if (!st) | |
| 55 | ✗ | return AVERROR(ENOMEM); | |
| 56 | |||
| 57 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 58 | ✗ | st->codecpar->ch_layout.nb_channels = channels; | |
| 59 | ✗ | st->codecpar->sample_rate = sample_rate; | |
| 60 | ✗ | st->codecpar->codec_id = ff_get_pcm_codec_id(bps, 0, 1, 0xFFFF); | |
| 61 | ✗ | st->codecpar->bits_per_coded_sample = bps; | |
| 62 | ✗ | st->codecpar->block_align = bps * st->codecpar->ch_layout.nb_channels / 8; | |
| 63 | |||
| 64 | ✗ | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 65 | |||
| 66 | ✗ | return 0; | |
| 67 | } | ||
| 68 | |||
| 69 | const FFInputFormat ff_pvf_demuxer = { | ||
| 70 | .p.name = "pvf", | ||
| 71 | .p.long_name = NULL_IF_CONFIG_SMALL("PVF (Portable Voice Format)"), | ||
| 72 | .p.extensions = "pvf", | ||
| 73 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 74 | .read_probe = pvf_probe, | ||
| 75 | .read_header = pvf_read_header, | ||
| 76 | .read_packet = ff_pcm_read_packet, | ||
| 77 | .read_seek = ff_pcm_read_seek, | ||
| 78 | }; | ||
| 79 |