| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * NIST Sphere 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 "libavutil/avstring.h" | ||
| 23 | #include "libavutil/intreadwrite.h" | ||
| 24 | #include "avformat.h" | ||
| 25 | #include "demux.h" | ||
| 26 | #include "internal.h" | ||
| 27 | #include "pcm.h" | ||
| 28 | |||
| 29 | 7128 | static int nist_probe(const AVProbeData *p) | |
| 30 | { | ||
| 31 |
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7128 | if (AV_RL64(p->buf) == AV_RL64("NIST_1A\x0a")) |
| 32 | 1 | return AVPROBE_SCORE_MAX; | |
| 33 | 7127 | return 0; | |
| 34 | } | ||
| 35 | |||
| 36 | 1 | static int nist_read_header(AVFormatContext *s) | |
| 37 | { | ||
| 38 | 1 | char buffer[256], coding[32] = "pcm", format[32] = "01"; | |
| 39 | 1 | int bps = 0, be = 0; | |
| 40 | 1 | int32_t header_size = -1; | |
| 41 | AVStream *st; | ||
| 42 | |||
| 43 | 1 | st = avformat_new_stream(s, NULL); | |
| 44 |
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1 | if (!st) |
| 45 | ✗ | return AVERROR(ENOMEM); | |
| 46 | |||
| 47 | 1 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 48 | |||
| 49 | 1 | ff_get_line(s->pb, buffer, sizeof(buffer)); | |
| 50 | 1 | ff_get_line(s->pb, buffer, sizeof(buffer)); | |
| 51 | 1 | sscanf(buffer, "%"SCNd32, &header_size); | |
| 52 |
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1 | if (header_size <= 0) |
| 53 | ✗ | return AVERROR_INVALIDDATA; | |
| 54 | |||
| 55 |
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6 | while (!avio_feof(s->pb)) { |
| 56 | 6 | ff_get_line(s->pb, buffer, sizeof(buffer)); | |
| 57 | |||
| 58 |
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6 | if (avio_tell(s->pb) >= header_size) |
| 59 | ✗ | return AVERROR_INVALIDDATA; | |
| 60 | |||
| 61 |
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6 | if (!memcmp(buffer, "end_head", 8)) { |
| 62 |
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1 | if (!st->codecpar->bits_per_coded_sample) |
| 63 | 1 | st->codecpar->bits_per_coded_sample = bps << 3; | |
| 64 | |||
| 65 |
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1 | if (!av_strcasecmp(coding, "pcm")) { |
| 66 | ✗ | if (st->codecpar->codec_id == AV_CODEC_ID_NONE) | |
| 67 | ✗ | st->codecpar->codec_id = ff_get_pcm_codec_id(st->codecpar->bits_per_coded_sample, | |
| 68 | 0, be, 0xFFFF); | ||
| 69 |
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1 | } else if (!av_strcasecmp(coding, "alaw")) { |
| 70 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW; | |
| 71 |
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1 | } else if (!av_strcasecmp(coding, "ulaw") || |
| 72 | ✗ | !av_strcasecmp(coding, "mu-law")) { | |
| 73 | 1 | st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW; | |
| 74 | ✗ | } else if (!av_strncasecmp(coding, "pcm,embedded-shorten", 20)) { | |
| 75 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_SHORTEN; | |
| 76 | ✗ | if (ff_alloc_extradata(st->codecpar, 1)) | |
| 77 | ✗ | st->codecpar->extradata[0] = 1; | |
| 78 | } else { | ||
| 79 | ✗ | avpriv_request_sample(s, "coding %s", coding); | |
| 80 | } | ||
| 81 | |||
| 82 | 1 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 83 | |||
| 84 | 1 | st->codecpar->block_align = st->codecpar->bits_per_coded_sample * | |
| 85 | 1 | st->codecpar->ch_layout.nb_channels / 8; | |
| 86 | |||
| 87 |
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1 | if (avio_tell(s->pb) > header_size) |
| 88 | ✗ | return AVERROR_INVALIDDATA; | |
| 89 | |||
| 90 | 1 | avio_skip(s->pb, header_size - avio_tell(s->pb)); | |
| 91 | |||
| 92 | 1 | return 0; | |
| 93 |
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5 | } else if (!memcmp(buffer, "channel_count", 13)) { |
| 94 | 1 | sscanf(buffer, "%*s %*s %u", &st->codecpar->ch_layout.nb_channels); | |
| 95 |
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1 | if (st->codecpar->ch_layout.nb_channels <= 0 || st->codecpar->ch_layout.nb_channels > INT16_MAX) |
| 96 | ✗ | return AVERROR_INVALIDDATA; | |
| 97 |
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4 | } else if (!memcmp(buffer, "sample_byte_format", 18)) { |
| 98 | ✗ | sscanf(buffer, "%*s %*s %31s", format); | |
| 99 | |||
| 100 | ✗ | if (!av_strcasecmp(format, "01")) { | |
| 101 | ✗ | be = 0; | |
| 102 | ✗ | } else if (!av_strcasecmp(format, "10")) { | |
| 103 | ✗ | be = 1; | |
| 104 | ✗ | } else if (!av_strcasecmp(format, "mu-law")) { | |
| 105 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW; | |
| 106 | ✗ | } else if (av_strcasecmp(format, "1")) { | |
| 107 | ✗ | avpriv_request_sample(s, "sample byte format %s", format); | |
| 108 | ✗ | return AVERROR_PATCHWELCOME; | |
| 109 | } | ||
| 110 |
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4 | } else if (!memcmp(buffer, "sample_coding", 13)) { |
| 111 | 1 | sscanf(buffer, "%*s %*s %31s", coding); | |
| 112 |
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3 | } else if (!memcmp(buffer, "sample_count", 12)) { |
| 113 | 1 | sscanf(buffer, "%*s %*s %"SCNd64, &st->duration); | |
| 114 |
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2 | } else if (!memcmp(buffer, "sample_n_bytes", 14)) { |
| 115 | 1 | sscanf(buffer, "%*s %*s %d", &bps); | |
| 116 |
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1 | if (bps > INT16_MAX/8U) |
| 117 | ✗ | return AVERROR_INVALIDDATA; | |
| 118 |
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1 | } else if (!memcmp(buffer, "sample_rate", 11)) { |
| 119 | 1 | sscanf(buffer, "%*s %*s %d", &st->codecpar->sample_rate); | |
| 120 | ✗ | } else if (!memcmp(buffer, "sample_sig_bits", 15)) { | |
| 121 | ✗ | sscanf(buffer, "%*s %*s %d", &st->codecpar->bits_per_coded_sample); | |
| 122 | ✗ | if (st->codecpar->bits_per_coded_sample <= 0 || st->codecpar->bits_per_coded_sample > INT16_MAX) | |
| 123 | ✗ | return AVERROR_INVALIDDATA; | |
| 124 | } else { | ||
| 125 | char key[32], value[32]; | ||
| 126 | ✗ | if (sscanf(buffer, "%31s %*s %31s", key, value) == 2) { | |
| 127 | ✗ | av_dict_set(&s->metadata, key, value, AV_DICT_APPEND); | |
| 128 | } else { | ||
| 129 | ✗ | av_log(s, AV_LOG_ERROR, "Failed to parse '%s' as metadata\n", buffer); | |
| 130 | } | ||
| 131 | } | ||
| 132 | } | ||
| 133 | |||
| 134 | ✗ | return AVERROR_EOF; | |
| 135 | } | ||
| 136 | |||
| 137 | const FFInputFormat ff_nistsphere_demuxer = { | ||
| 138 | .p.name = "nistsphere", | ||
| 139 | .p.long_name = NULL_IF_CONFIG_SMALL("NIST SPeech HEader REsources"), | ||
| 140 | .p.extensions = "nist,sph", | ||
| 141 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 142 | .read_probe = nist_probe, | ||
| 143 | .read_header = nist_read_header, | ||
| 144 | .read_packet = ff_pcm_read_packet, | ||
| 145 | .read_seek = ff_pcm_read_seek, | ||
| 146 | }; | ||
| 147 |