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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 2 | * WavPack demuxer |
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| 3 | * Copyright (c) 2006,2011 Konstantin Shishkov |
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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 "libavutil/channel_layout.h" |
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| 23 | #include "libavutil/intreadwrite.h" |
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| 24 | #include "libavutil/dict.h" |
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| 25 | #include "avformat.h" |
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| 26 | #include "internal.h" |
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| 27 | #include "apetag.h" |
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| 28 | #include "id3v1.h" |
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| 29 | #include "wv.h" |
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| 30 | |||
| 31 | enum WV_FLAGS { |
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| 32 | WV_MONO = 0x0004, |
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| 33 | WV_HYBRID = 0x0008, |
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| 34 | WV_JOINT = 0x0010, |
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| 35 | WV_CROSSD = 0x0020, |
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| 36 | WV_HSHAPE = 0x0040, |
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| 37 | WV_FLOAT = 0x0080, |
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| 38 | WV_INT32 = 0x0100, |
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| 39 | WV_HBR = 0x0200, |
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| 40 | WV_HBAL = 0x0400, |
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| 41 | WV_MCINIT = 0x0800, |
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| 42 | WV_MCEND = 0x1000, |
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| 43 | }; |
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| 44 | |||
| 45 | static const int wv_rates[16] = { |
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| 46 | 6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000, |
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| 47 | 32000, 44100, 48000, 64000, 88200, 96000, 192000, -1 |
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| 48 | }; |
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| 49 | |||
| 50 | typedef struct { |
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| 51 | uint8_t block_header[WV_HEADER_SIZE]; |
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| 52 | WvHeader header; |
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| 53 | int rate, chan, bpp; |
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| 54 | uint32_t chmask; |
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| 55 | int multichannel; |
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| 56 | int block_parsed; |
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| 57 | int64_t pos; |
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| 58 | |||
| 59 | int64_t apetag_start; |
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| 60 | } WVContext; |
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| 61 | |||
| 62 | static int wv_probe(AVProbeData *p) |
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| 63 | { |
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| 64 | /* check file header */ |
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| 65 | if (p->buf_size <= 32) |
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| 66 | return 0; |
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| 67 | if (AV_RL32(&p->buf[0]) == MKTAG('w', 'v', 'p', 'k') && |
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| 68 | AV_RL32(&p->buf[4]) >= 24 && |
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| 69 | AV_RL32(&p->buf[4]) <= WV_BLOCK_LIMIT && |
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| 70 | AV_RL16(&p->buf[8]) >= 0x402 && |
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| 71 | AV_RL16(&p->buf[8]) <= 0x410) |
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| 72 | return AVPROBE_SCORE_MAX; |
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| 73 | else |
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| 74 | return 0; |
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| 75 | } |
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| 76 | |||
| 77 | static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb) |
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| 78 | { |
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| 79 | WVContext *wc = ctx->priv_data; |
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| 80 | int ret; |
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| 81 | int rate, bpp, chan; |
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| 82 | uint32_t chmask, flags; |
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| 83 | |||
| 84 | wc->pos = avio_tell(pb); |
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| 85 | |||
| 86 | /* don't return bogus packets with the ape tag data */ |
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| 87 | if (wc->apetag_start && wc->pos >= wc->apetag_start) |
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| 88 | return AVERROR_EOF; |
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| 89 | |||
| 90 | ret = avio_read(pb, wc->block_header, WV_HEADER_SIZE); |
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| 91 | if (ret != WV_HEADER_SIZE) |
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| 92 | return (ret < 0) ? ret : AVERROR_EOF; |
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| 93 | |||
| 94 | ret = ff_wv_parse_header(&wc->header, wc->block_header); |
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| 95 | if (ret < 0) { |
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| 96 | av_log(ctx, AV_LOG_ERROR, "Invalid block header.\n"); |
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| 97 | return ret; |
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| 98 | } |
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| 99 | |||
| 100 | if (wc->header.version < 0x402 || wc->header.version > 0x410) { |
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| 101 | av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", wc->header.version); |
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| 102 | return AVERROR_PATCHWELCOME; |
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| 103 | } |
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| 104 | |||
| 105 | /* Blocks with zero samples don't contain actual audio information |
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| 106 | * and should be ignored */ |
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| 107 | if (!wc->header.samples) |
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| 108 | return 0; |
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| 109 | // parse flags |
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| 110 | flags = wc->header.flags; |
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| 111 | bpp = ((flags & 3) + 1) << 3; |
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| 112 | chan = 1 + !(flags & WV_MONO); |
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| 113 | chmask = flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO; |
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| 114 | rate = wv_rates[(flags >> 23) & 0xF]; |
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| 115 | wc->multichannel = !(wc->header.initial && wc->header.final); |
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| 116 | if (wc->multichannel) { |
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| 117 | chan = wc->chan; |
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| 118 | chmask = wc->chmask; |
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| 119 | } |
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| 120 | if ((rate == -1 || !chan) && !wc->block_parsed) { |
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| 121 | int64_t block_end = avio_tell(pb) + wc->header.blocksize; |
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| 122 | if (!pb->seekable) { |
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| 123 | av_log(ctx, AV_LOG_ERROR, |
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| 124 | "Cannot determine additional parameters\n"); |
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| 125 | return AVERROR_INVALIDDATA; |
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| 126 | } |
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| 127 | while (avio_tell(pb) < block_end) { |
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| 128 | int id, size; |
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| 129 | id = avio_r8(pb); |
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| 130 | size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb); |
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| 131 | size <<= 1; |
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| 132 | if (id & 0x40) |
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| 133 | size--; |
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| 134 | switch (id & 0x3F) { |
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| 135 | case 0xD: |
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| 136 | if (size <= 1) { |
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| 137 | av_log(ctx, AV_LOG_ERROR, |
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| 138 | "Insufficient channel information\n"); |
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| 139 | return AVERROR_INVALIDDATA; |
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| 140 | } |
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| 141 | chan = avio_r8(pb); |
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| 142 | switch (size - 2) { |
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| 143 | case 0: |
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| 144 | chmask = avio_r8(pb); |
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| 145 | break; |
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| 146 | case 1: |
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| 147 | chmask = avio_rl16(pb); |
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| 148 | break; |
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| 149 | case 2: |
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| 150 | chmask = avio_rl24(pb); |
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| 151 | break; |
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| 152 | case 3: |
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| 153 | chmask = avio_rl32(pb); |
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| 154 | break; |
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| 155 | case 5: |
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| 156 | avio_skip(pb, 1); |
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| 157 | chan |= (avio_r8(pb) & 0xF) << 8; |
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| 158 | chmask = avio_rl24(pb); |
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| 159 | break; |
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| 160 | default: |
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| 161 | av_log(ctx, AV_LOG_ERROR, |
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| 162 | "Invalid channel info size %d\n", size); |
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| 163 | return AVERROR_INVALIDDATA; |
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| 164 | } |
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| 165 | break; |
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| 166 | case 0x27: |
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| 167 | rate = avio_rl24(pb); |
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| 168 | break; |
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| 169 | default: |
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| 170 | avio_skip(pb, size); |
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| 171 | } |
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| 172 | if (id & 0x40) |
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| 173 | avio_skip(pb, 1); |
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| 174 | } |
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| 175 | if (rate == -1) { |
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| 176 | av_log(ctx, AV_LOG_ERROR, |
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| 177 | "Cannot determine custom sampling rate\n"); |
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| 178 | return AVERROR_INVALIDDATA; |
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| 179 | } |
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| 180 | avio_seek(pb, block_end - wc->header.blocksize, SEEK_SET); |
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| 181 | } |
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| 182 | if (!wc->bpp) |
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| 183 | wc->bpp = bpp; |
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| 184 | if (!wc->chan) |
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| 185 | wc->chan = chan; |
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| 186 | if (!wc->chmask) |
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| 187 | wc->chmask = chmask; |
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| 188 | if (!wc->rate) |
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| 189 | wc->rate = rate; |
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| 190 | |||
| 191 | if (flags && bpp != wc->bpp) { |
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| 192 | av_log(ctx, AV_LOG_ERROR, |
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| 193 | "Bits per sample differ, this block: %i, header block: %i\n", |
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| 194 | bpp, wc->bpp); |
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| 195 | return AVERROR_INVALIDDATA; |
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| 196 | } |
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| 197 | if (flags && !wc->multichannel && chan != wc->chan) { |
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| 198 | av_log(ctx, AV_LOG_ERROR, |
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| 199 | "Channels differ, this block: %i, header block: %i\n", |
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| 200 | chan, wc->chan); |
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| 201 | return AVERROR_INVALIDDATA; |
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| 202 | } |
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| 203 | if (flags && rate != -1 && rate != wc->rate) { |
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| 204 | av_log(ctx, AV_LOG_ERROR, |
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| 205 | "Sampling rate differ, this block: %i, header block: %i\n", |
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| 206 | rate, wc->rate); |
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| 207 | return AVERROR_INVALIDDATA; |
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| 208 | } |
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| 209 | return 0; |
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| 210 | } |
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| 211 | |||
| 212 | static int wv_read_header(AVFormatContext *s) |
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| 213 | { |
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| 214 | AVIOContext *pb = s->pb; |
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| 215 | WVContext *wc = s->priv_data; |
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| 216 | AVStream *st; |
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| 217 | int ret; |
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| 218 | |||
| 219 | wc->block_parsed = 0; |
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| 220 | for (;;) { |
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| 221 | if ((ret = wv_read_block_header(s, pb)) < 0) |
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| 222 | return ret; |
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| 223 | if (!wc->header.samples) |
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| 224 | avio_skip(pb, wc->header.blocksize); |
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| 225 | else |
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| 226 | break; |
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| 227 | } |
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| 228 | |||
| 229 | /* now we are ready: build format streams */ |
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| 230 | st = avformat_new_stream(s, NULL); |
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| 231 | if (!st) |
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| 232 | return AVERROR(ENOMEM); |
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| 233 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 234 | st->codec->codec_id = AV_CODEC_ID_WAVPACK; |
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| 235 | st->codec->channels = wc->chan; |
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| 236 | st->codec->channel_layout = wc->chmask; |
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| 237 | st->codec->sample_rate = wc->rate; |
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| 238 | st->codec->bits_per_coded_sample = wc->bpp; |
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| 239 | avpriv_set_pts_info(st, 64, 1, wc->rate); |
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| 240 | st->start_time = 0; |
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| 241 | if (wc->header.total_samples != 0xFFFFFFFFu) |
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| 242 | st->duration = wc->header.total_samples; |
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| 243 | |||
| 244 | if (s->pb->seekable) { |
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| 245 | int64_t cur = avio_tell(s->pb); |
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| 246 | wc->apetag_start = ff_ape_parse_tag(s); |
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| 247 | if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) |
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| 248 | ff_id3v1_read(s); |
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| 249 | avio_seek(s->pb, cur, SEEK_SET); |
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| 250 | } |
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| 251 | |||
| 252 | return 0; |
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| 253 | } |
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| 254 | |||
| 255 | static int wv_read_packet(AVFormatContext *s, AVPacket *pkt) |
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| 256 | { |
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| 257 | WVContext *wc = s->priv_data; |
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| 258 | int ret; |
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| 259 | int off; |
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| 260 | int64_t pos; |
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| 261 | uint32_t block_samples; |
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| 262 | |||
| 263 | if (url_feof(s->pb)) |
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| 264 | return AVERROR_EOF; |
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| 265 | if (wc->block_parsed) { |
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| 266 | if ((ret = wv_read_block_header(s, s->pb)) < 0) |
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| 267 | return ret; |
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| 268 | } |
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| 269 | |||
| 270 | pos = wc->pos; |
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| 271 | if (av_new_packet(pkt, wc->header.blocksize + WV_HEADER_SIZE) < 0) |
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| 272 | return AVERROR(ENOMEM); |
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| 273 | memcpy(pkt->data, wc->block_header, WV_HEADER_SIZE); |
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| 274 | ret = avio_read(s->pb, pkt->data + WV_HEADER_SIZE, wc->header.blocksize); |
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| 275 | if (ret != wc->header.blocksize) { |
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| 276 | av_free_packet(pkt); |
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| 277 | return AVERROR(EIO); |
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| 278 | } |
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| 279 | while (!(wc->header.flags & WV_FLAG_FINAL_BLOCK)) { |
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| 280 | if ((ret = wv_read_block_header(s, s->pb)) < 0) { |
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| 281 | av_free_packet(pkt); |
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| 282 | return ret; |
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| 283 | } |
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| 284 | |||
| 285 | off = pkt->size; |
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| 286 | if ((ret = av_grow_packet(pkt, WV_HEADER_SIZE + wc->header.blocksize)) < 0) { |
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| 287 | av_free_packet(pkt); |
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| 288 | return ret; |
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| 289 | } |
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| 290 | memcpy(pkt->data + off, wc->block_header, WV_HEADER_SIZE); |
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| 291 | |||
| 292 | ret = avio_read(s->pb, pkt->data + off + WV_HEADER_SIZE, wc->header.blocksize); |
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| 293 | if (ret != wc->header.blocksize) { |
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| 294 | av_free_packet(pkt); |
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| 295 | return (ret < 0) ? ret : AVERROR_EOF; |
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| 296 | } |
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| 297 | } |
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| 298 | pkt->stream_index = 0; |
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| 299 | wc->block_parsed = 1; |
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| 300 | pkt->pts = wc->header.block_idx; |
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| 301 | block_samples = wc->header.samples; |
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| 302 | if (block_samples > INT32_MAX) |
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| 303 | av_log(s, AV_LOG_WARNING, |
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| 304 | "Too many samples in block: %"PRIu32"\n", block_samples); |
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| 305 | else |
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| 306 | pkt->duration = block_samples; |
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| 307 | |||
| 308 | av_add_index_entry(s->streams[0], pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME); |
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| 309 | return 0; |
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| 310 | } |
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| 311 | |||
| 312 | static int wv_read_seek(AVFormatContext *s, int stream_index, |
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| 313 | int64_t timestamp, int flags) |
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| 314 | { |
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| 315 | AVStream *st = s->streams[stream_index]; |
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| 316 | WVContext *wc = s->priv_data; |
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| 317 | AVPacket pkt1, *pkt = &pkt1; |
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| 318 | int ret; |
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| 319 | int index = av_index_search_timestamp(st, timestamp, flags); |
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| 320 | int64_t pos, pts; |
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| 321 | |||
| 322 | /* if found, seek there */ |
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| 323 | if (index >= 0 && |
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| 324 | timestamp <= st->index_entries[st->nb_index_entries - 1].timestamp) { |
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| 325 | wc->block_parsed = 1; |
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| 326 | avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET); |
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| 327 | return 0; |
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| 328 | } |
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| 329 | /* if timestamp is out of bounds, return error */ |
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| 330 | if (timestamp < 0 || timestamp >= s->duration) |
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| 331 | return AVERROR(EINVAL); |
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| 332 | |||
| 333 | pos = avio_tell(s->pb); |
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| 334 | do { |
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| 335 | ret = av_read_frame(s, pkt); |
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| 336 | if (ret < 0) { |
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| 337 | avio_seek(s->pb, pos, SEEK_SET); |
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| 338 | return ret; |
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| 339 | } |
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| 340 | pts = pkt->pts; |
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| 341 | av_free_packet(pkt); |
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| 342 | } while(pts < timestamp); |
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| 343 | return 0; |
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| 344 | } |
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| 345 | |||
| 346 | AVInputFormat ff_wv_demuxer = { |
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| 347 | .name = "wv", |
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| 348 | .long_name = NULL_IF_CONFIG_SMALL("WavPack"), |
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| 349 | .priv_data_size = sizeof(WVContext), |
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| 350 | .read_probe = wv_probe, |
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| 351 | .read_header = wv_read_header, |
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| 352 | .read_packet = wv_read_packet, |
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| 353 | .read_seek = wv_read_seek, |
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| 354 | }; |