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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * SoX native format demuxer |
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| 3 | * Copyright (c) 2009 Daniel Verkamp |
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| 4 | * |
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| 5 | * Based on libSoX sox-fmt.c |
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| 6 | * Copyright (c) 2008 robs@users.sourceforge.net |
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| 7 | * |
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| 8 | * This file is part of FFmpeg. |
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| 9 | * |
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| 10 | * FFmpeg is free software; you can redistribute it and/or |
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| 11 | * modify it under the terms of the GNU Lesser General Public |
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| 12 | * License as published by the Free Software Foundation; either |
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| 13 | * version 2.1 of the License, or (at your option) any later version. |
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| 14 | * |
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| 15 | * FFmpeg is distributed in the hope that it will be useful, |
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * Lesser General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU Lesser General Public |
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| 21 | * License along with FFmpeg; if not, write to the Free Software |
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| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |||
| 25 | /** |
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| 26 | * @file |
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| 27 | * SoX native format demuxer |
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| 28 | * @author Daniel Verkamp |
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| 29 | * @see http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format |
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| 30 | */ |
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| 31 | |||
| 32 | #include "libavutil/intreadwrite.h" |
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| 33 | #include "libavutil/intfloat.h" |
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| 34 | #include "libavutil/dict.h" |
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| 35 | #include "avformat.h" |
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| 36 | #include "internal.h" |
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| 37 | #include "pcm.h" |
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| 38 | #include "sox.h" |
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| 39 | |||
| 40 | static int sox_probe(AVProbeData *p) |
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| 41 | { |
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| 42 | if (AV_RL32(p->buf) == SOX_TAG || AV_RB32(p->buf) == SOX_TAG) |
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| 43 | return AVPROBE_SCORE_MAX; |
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| 44 | return 0; |
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| 45 | } |
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| 46 | |||
| 47 | static int sox_read_header(AVFormatContext *s) |
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| 48 | { |
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| 49 | AVIOContext *pb = s->pb; |
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| 50 | unsigned header_size, comment_size; |
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| 51 | double sample_rate, sample_rate_frac; |
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| 52 | AVStream *st; |
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| 53 | |||
| 54 | st = avformat_new_stream(s, NULL); |
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| 55 | if (!st) |
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| 56 | return AVERROR(ENOMEM); |
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| 57 | |||
| 58 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 59 | |||
| 60 | if (avio_rl32(pb) == SOX_TAG) { |
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| 61 | st->codec->codec_id = AV_CODEC_ID_PCM_S32LE; |
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| 62 | header_size = avio_rl32(pb); |
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| 63 | avio_skip(pb, 8); /* sample count */ |
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| 64 | sample_rate = av_int2double(avio_rl64(pb)); |
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| 65 | st->codec->channels = avio_rl32(pb); |
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| 66 | comment_size = avio_rl32(pb); |
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| 67 | } else { |
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| 68 | st->codec->codec_id = AV_CODEC_ID_PCM_S32BE; |
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| 69 | header_size = avio_rb32(pb); |
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| 70 | avio_skip(pb, 8); /* sample count */ |
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| 71 | sample_rate = av_int2double(avio_rb64(pb)); |
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| 72 | st->codec->channels = avio_rb32(pb); |
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| 73 | comment_size = avio_rb32(pb); |
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| 74 | } |
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| 75 | |||
| 76 | if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) { |
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| 77 | av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size); |
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| 78 | return AVERROR_INVALIDDATA; |
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| 79 | } |
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| 80 | |||
| 81 | if (sample_rate <= 0 || sample_rate > INT_MAX) { |
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| 82 | av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate); |
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| 83 | return AVERROR_INVALIDDATA; |
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| 84 | } |
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| 85 | |||
| 86 | sample_rate_frac = sample_rate - floor(sample_rate); |
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| 87 | if (sample_rate_frac) |
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| 88 | av_log(s, AV_LOG_WARNING, |
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| 89 | "truncating fractional part of sample rate (%f)\n", |
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| 90 | sample_rate_frac); |
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| 91 | |||
| 92 | if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size |
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| 93 | || st->codec->channels > 65535) /* Reserve top 16 bits */ { |
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| 94 | av_log(s, AV_LOG_ERROR, "invalid header\n"); |
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| 95 | return AVERROR_INVALIDDATA; |
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| 96 | } |
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| 97 | |||
| 98 | if (comment_size && comment_size < UINT_MAX) { |
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| 99 | char *comment = av_malloc(comment_size+1); |
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| 100 | if(!comment) |
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| 101 | return AVERROR(ENOMEM); |
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| 102 | if (avio_read(pb, comment, comment_size) != comment_size) { |
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| 103 | av_freep(&comment); |
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| 104 | return AVERROR(EIO); |
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| 105 | } |
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| 106 | comment[comment_size] = 0; |
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| 107 | |||
| 108 | av_dict_set(&s->metadata, "comment", comment, |
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| 109 | AV_DICT_DONT_STRDUP_VAL); |
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| 110 | } |
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| 111 | |||
| 112 | avio_skip(pb, header_size - SOX_FIXED_HDR - comment_size); |
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| 113 | |||
| 114 | st->codec->sample_rate = sample_rate; |
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| 115 | st->codec->bits_per_coded_sample = 32; |
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| 116 | st->codec->bit_rate = st->codec->sample_rate * |
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| 117 | st->codec->bits_per_coded_sample * |
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| 118 | st->codec->channels; |
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| 119 | st->codec->block_align = st->codec->bits_per_coded_sample * |
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| 120 | st->codec->channels / 8; |
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| 121 | |||
| 122 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
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| 123 | |||
| 124 | return 0; |
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| 125 | } |
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| 126 | |||
| 127 | AVInputFormat ff_sox_demuxer = { |
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| 128 | .name = "sox", |
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| 129 | .long_name = NULL_IF_CONFIG_SMALL("SoX native"), |
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| 130 | .read_probe = sox_probe, |
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| 131 | .read_header = sox_read_header, |
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| 132 | .read_packet = ff_pcm_read_packet, |
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| 133 | .read_seek = ff_pcm_read_seek, |
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| 134 | }; |