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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * AIFF/AIFF-C demuxer |
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| 3 | * Copyright (c) 2006 Patrick Guimond |
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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/intreadwrite.h" |
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| 23 | #include "libavutil/mathematics.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 "pcm.h" |
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| 28 | #include "aiff.h" |
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| 29 | #include "isom.h" |
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| 30 | #include "id3v2.h" |
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| 31 | #include "mov_chan.h" |
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| 32 | |||
| 33 | #define AIFF 0 |
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| 34 | #define AIFF_C_VERSION1 0xA2805140 |
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| 35 | |||
| 36 | typedef struct { |
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| 37 | int64_t data_end; |
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| 38 | int block_duration; |
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| 39 | } AIFFInputContext; |
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| 40 | |||
| 41 | static enum AVCodecID aiff_codec_get_id(int bps) |
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| 42 | { |
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| 43 | if (bps <= 8) |
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| 44 | return AV_CODEC_ID_PCM_S8; |
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| 45 | if (bps <= 16) |
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| 46 | return AV_CODEC_ID_PCM_S16BE; |
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| 47 | if (bps <= 24) |
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| 48 | return AV_CODEC_ID_PCM_S24BE; |
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| 49 | if (bps <= 32) |
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| 50 | return AV_CODEC_ID_PCM_S32BE; |
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| 51 | |||
| 52 | /* bigger than 32 isn't allowed */ |
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| 53 | return AV_CODEC_ID_NONE; |
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| 54 | } |
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| 55 | |||
| 56 | /* returns the size of the found tag */ |
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| 57 | static int get_tag(AVIOContext *pb, uint32_t * tag) |
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| 58 | { |
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| 59 | int size; |
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| 60 | |||
| 61 | if (url_feof(pb)) |
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| 62 | return AVERROR(EIO); |
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| 63 | |||
| 64 | *tag = avio_rl32(pb); |
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| 65 | size = avio_rb32(pb); |
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| 66 | |||
| 67 | if (size < 0) |
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| 68 | size = 0x7fffffff; |
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| 69 | |||
| 70 | return size; |
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| 71 | } |
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| 72 | |||
| 73 | /* Metadata string read */ |
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| 74 | static void get_meta(AVFormatContext *s, const char *key, int size) |
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| 75 | { |
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| 76 | uint8_t *str = av_malloc(size+1); |
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| 77 | |||
| 78 | if (str) { |
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| 79 | int res = avio_read(s->pb, str, size); |
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| 80 | if (res < 0){ |
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| 81 | av_free(str); |
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| 82 | return; |
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| 83 | } |
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| 84 | size += (size&1)-res; |
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| 85 | str[res] = 0; |
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| 86 | av_dict_set(&s->metadata, key, str, AV_DICT_DONT_STRDUP_VAL); |
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| 87 | }else |
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| 88 | size+= size&1; |
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| 89 | |||
| 90 | avio_skip(s->pb, size); |
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| 91 | } |
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| 92 | |||
| 93 | /* Returns the number of sound data frames or negative on error */ |
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| 94 | static unsigned int get_aiff_header(AVFormatContext *s, int size, |
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| 95 | unsigned version) |
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| 96 | { |
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| 97 | AVIOContext *pb = s->pb; |
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| 98 | AVCodecContext *codec = s->streams[0]->codec; |
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| 99 | AIFFInputContext *aiff = s->priv_data; |
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| 100 | int exp; |
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| 101 | uint64_t val; |
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| 102 | double sample_rate; |
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| 103 | unsigned int num_frames; |
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| 104 | |||
| 105 | if (size & 1) |
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| 106 | size++; |
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| 107 | codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 108 | codec->channels = avio_rb16(pb); |
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| 109 | num_frames = avio_rb32(pb); |
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| 110 | codec->bits_per_coded_sample = avio_rb16(pb); |
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| 111 | |||
| 112 | exp = avio_rb16(pb); |
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| 113 | val = avio_rb64(pb); |
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| 114 | sample_rate = ldexp(val, exp - 16383 - 63); |
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| 115 | codec->sample_rate = sample_rate; |
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| 116 | size -= 18; |
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| 117 | |||
| 118 | /* get codec id for AIFF-C */ |
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| 119 | if (version == AIFF_C_VERSION1) { |
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| 120 | codec->codec_tag = avio_rl32(pb); |
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| 121 | codec->codec_id = ff_codec_get_id(ff_codec_aiff_tags, codec->codec_tag); |
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| 122 | size -= 4; |
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| 123 | } |
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| 124 | |||
| 125 | if (version != AIFF_C_VERSION1 || codec->codec_id == AV_CODEC_ID_PCM_S16BE) { |
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| 126 | codec->codec_id = aiff_codec_get_id(codec->bits_per_coded_sample); |
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| 127 | codec->bits_per_coded_sample = av_get_bits_per_sample(codec->codec_id); |
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| 128 | aiff->block_duration = 1; |
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| 129 | } else { |
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| 130 | switch (codec->codec_id) { |
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| 131 | case AV_CODEC_ID_PCM_F32BE: |
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| 132 | case AV_CODEC_ID_PCM_F64BE: |
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| 133 | case AV_CODEC_ID_PCM_S16LE: |
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| 134 | case AV_CODEC_ID_PCM_ALAW: |
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| 135 | case AV_CODEC_ID_PCM_MULAW: |
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| 136 | aiff->block_duration = 1; |
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| 137 | break; |
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| 138 | case AV_CODEC_ID_ADPCM_IMA_QT: |
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| 139 | codec->block_align = 34*codec->channels; |
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| 140 | break; |
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| 141 | case AV_CODEC_ID_MACE3: |
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| 142 | codec->block_align = 2*codec->channels; |
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| 143 | break; |
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| 144 | case AV_CODEC_ID_ADPCM_G726LE: |
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| 145 | codec->bits_per_coded_sample = 5; |
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| 146 | case AV_CODEC_ID_ADPCM_G722: |
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| 147 | case AV_CODEC_ID_MACE6: |
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| 148 | codec->block_align = 1*codec->channels; |
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| 149 | break; |
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| 150 | case AV_CODEC_ID_GSM: |
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| 151 | codec->block_align = 33; |
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| 152 | break; |
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| 153 | default: |
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| 154 | aiff->block_duration = 1; |
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| 155 | break; |
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| 156 | } |
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| 157 | if (codec->block_align > 0) |
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| 158 | aiff->block_duration = av_get_audio_frame_duration(codec, |
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| 159 | codec->block_align); |
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| 160 | } |
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| 161 | |||
| 162 | /* Block align needs to be computed in all cases, as the definition |
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| 163 | * is specific to applications -> here we use the WAVE format definition */ |
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| 164 | if (!codec->block_align) |
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| 165 | codec->block_align = (av_get_bits_per_sample(codec->codec_id) * codec->channels) >> 3; |
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| 166 | |||
| 167 | if (aiff->block_duration) { |
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| 168 | codec->bit_rate = codec->sample_rate * (codec->block_align << 3) / |
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| 169 | aiff->block_duration; |
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| 170 | } |
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| 171 | |||
| 172 | /* Chunk is over */ |
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| 173 | if (size) |
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| 174 | avio_skip(pb, size); |
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| 175 | |||
| 176 | return num_frames; |
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| 177 | } |
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| 178 | |||
| 179 | static int aiff_probe(AVProbeData *p) |
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| 180 | { |
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| 181 | /* check file header */ |
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| 182 | if (p->buf[0] == 'F' && p->buf[1] == 'O' && |
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| 183 | p->buf[2] == 'R' && p->buf[3] == 'M' && |
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| 184 | p->buf[8] == 'A' && p->buf[9] == 'I' && |
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| 185 | p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C')) |
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| 186 | return AVPROBE_SCORE_MAX; |
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| 187 | else |
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| 188 | return 0; |
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| 189 | } |
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| 190 | |||
| 191 | /* aiff input */ |
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| 192 | static int aiff_read_header(AVFormatContext *s) |
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| 193 | { |
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| 194 | int ret, size, filesize; |
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| 195 | int64_t offset = 0, position; |
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| 196 | uint32_t tag; |
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| 197 | unsigned version = AIFF_C_VERSION1; |
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| 198 | AVIOContext *pb = s->pb; |
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| 199 | AVStream * st; |
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| 200 | AIFFInputContext *aiff = s->priv_data; |
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| 201 | ID3v2ExtraMeta *id3v2_extra_meta = NULL; |
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| 202 | |||
| 203 | /* check FORM header */ |
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| 204 | filesize = get_tag(pb, &tag); |
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| 205 | if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M')) |
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| 206 | return AVERROR_INVALIDDATA; |
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| 207 | |||
| 208 | /* AIFF data type */ |
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| 209 | tag = avio_rl32(pb); |
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| 210 | if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */ |
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| 211 | version = AIFF; |
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| 212 | else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */ |
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| 213 | return AVERROR_INVALIDDATA; |
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| 214 | |||
| 215 | filesize -= 4; |
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| 216 | |||
| 217 | st = avformat_new_stream(s, NULL); |
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| 218 | if (!st) |
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| 219 | return AVERROR(ENOMEM); |
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| 220 | |||
| 221 | while (filesize > 0) { |
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| 222 | /* parse different chunks */ |
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| 223 | size = get_tag(pb, &tag); |
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| 224 | if (size < 0) |
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| 225 | return size; |
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| 226 | |||
| 227 | filesize -= size + 8; |
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| 228 | |||
| 229 | switch (tag) { |
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| 230 | case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */ |
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| 231 | /* Then for the complete header info */ |
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| 232 | st->nb_frames = get_aiff_header(s, size, version); |
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| 233 | if (st->nb_frames < 0) |
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| 234 | return st->nb_frames; |
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| 235 | if (offset > 0) // COMM is after SSND |
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| 236 | goto got_sound; |
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| 237 | break; |
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| 238 | case MKTAG('I', 'D', '3', ' '): |
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| 239 | position = avio_tell(pb); |
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| 240 | ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta); |
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| 241 | if (id3v2_extra_meta) |
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| 242 | if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) { |
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| 243 | ff_id3v2_free_extra_meta(&id3v2_extra_meta); |
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| 244 | return ret; |
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| 245 | } |
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| 246 | ff_id3v2_free_extra_meta(&id3v2_extra_meta); |
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| 247 | if (position + size > avio_tell(pb)) |
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| 248 | avio_skip(pb, position + size - avio_tell(pb)); |
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| 249 | break; |
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| 250 | case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */ |
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| 251 | version = avio_rb32(pb); |
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| 252 | break; |
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| 253 | case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */ |
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| 254 | get_meta(s, "title" , size); |
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| 255 | break; |
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| 256 | case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */ |
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| 257 | get_meta(s, "author" , size); |
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| 258 | break; |
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| 259 | case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */ |
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| 260 | get_meta(s, "copyright", size); |
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| 261 | break; |
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| 262 | case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */ |
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| 263 | get_meta(s, "comment" , size); |
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| 264 | break; |
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| 265 | case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */ |
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| 266 | aiff->data_end = avio_tell(pb) + size; |
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| 267 | offset = avio_rb32(pb); /* Offset of sound data */ |
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| 268 | avio_rb32(pb); /* BlockSize... don't care */ |
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| 269 | offset += avio_tell(pb); /* Compute absolute data offset */ |
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| 270 | if (st->codec->block_align && !pb->seekable) /* Assume COMM already parsed */ |
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| 271 | goto got_sound; |
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| 272 | if (!pb->seekable) { |
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| 273 | av_log(s, AV_LOG_ERROR, "file is not seekable\n"); |
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| 274 | return -1; |
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| 275 | } |
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| 276 | avio_skip(pb, size - 8); |
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| 277 | break; |
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| 278 | case MKTAG('w', 'a', 'v', 'e'): |
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| 279 | if ((uint64_t)size > (1<<30)) |
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| 280 | return -1; |
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| 281 | if (ff_alloc_extradata(st->codec, size)) |
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| 282 | return AVERROR(ENOMEM); |
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| 283 | avio_read(pb, st->codec->extradata, size); |
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| 284 | if (st->codec->codec_id == AV_CODEC_ID_QDM2 && size>=12*4 && !st->codec->block_align) { |
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| 285 | st->codec->block_align = AV_RB32(st->codec->extradata+11*4); |
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| 286 | aiff->block_duration = AV_RB32(st->codec->extradata+9*4); |
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| 287 | } else if (st->codec->codec_id == AV_CODEC_ID_QCELP) { |
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| 288 | char rate = 0; |
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| 289 | if (size >= 25) |
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| 290 | rate = st->codec->extradata[24]; |
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| 291 | switch (rate) { |
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| 292 | case 'H': // RATE_HALF |
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| 293 | st->codec->block_align = 17; |
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| 294 | break; |
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| 295 | case 'F': // RATE_FULL |
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| 296 | default: |
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| 297 | st->codec->block_align = 35; |
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| 298 | } |
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| 299 | aiff->block_duration = 160; |
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| 300 | st->codec->bit_rate = st->codec->sample_rate * (st->codec->block_align << 3) / |
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| 301 | aiff->block_duration; |
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| 302 | } |
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| 303 | break; |
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| 304 | case MKTAG('C','H','A','N'): |
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| 305 | if(ff_mov_read_chan(s, pb, st, size) < 0) |
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| 306 | return AVERROR_INVALIDDATA; |
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| 307 | break; |
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| 308 | default: /* Jump */ |
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| 309 | if (size & 1) /* Always even aligned */ |
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| 310 | size++; |
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| 311 | avio_skip(pb, size); |
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| 312 | } |
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| 313 | } |
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| 314 | |||
| 315 | got_sound: |
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| 316 | if (!st->codec->block_align) { |
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| 317 | av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n"); |
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| 318 | return -1; |
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| 319 | } |
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| 320 | |||
| 321 | /* Now positioned, get the sound data start and end */ |
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| 322 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
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| 323 | st->start_time = 0; |
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| 324 | st->duration = st->nb_frames * aiff->block_duration; |
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| 325 | |||
| 326 | /* Position the stream at the first block */ |
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| 327 | avio_seek(pb, offset, SEEK_SET); |
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| 328 | |||
| 329 | return 0; |
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| 330 | } |
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| 331 | |||
| 332 | #define MAX_SIZE 4096 |
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| 333 | |||
| 334 | static int aiff_read_packet(AVFormatContext *s, |
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| 335 | AVPacket *pkt) |
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| 336 | { |
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| 337 | AVStream *st = s->streams[0]; |
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| 338 | AIFFInputContext *aiff = s->priv_data; |
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| 339 | int64_t max_size; |
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| 340 | int res, size; |
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| 341 | |||
| 342 | /* calculate size of remaining data */ |
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| 343 | max_size = aiff->data_end - avio_tell(s->pb); |
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| 344 | if (max_size <= 0) |
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| 345 | return AVERROR_EOF; |
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| 346 | |||
| 347 | /* Now for that packet */ |
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| 348 | if (st->codec->block_align >= 17) // GSM, QCLP, IMA4 |
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| 349 | size = st->codec->block_align; |
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| 350 | else |
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| 351 | size = (MAX_SIZE / st->codec->block_align) * st->codec->block_align; |
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| 352 | size = FFMIN(max_size, size); |
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| 353 | res = av_get_packet(s->pb, pkt, size); |
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| 354 | if (res < 0) |
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| 355 | return res; |
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| 356 | |||
| 357 | if (size >= st->codec->block_align) |
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| 358 | pkt->flags &= ~AV_PKT_FLAG_CORRUPT; |
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| 359 | /* Only one stream in an AIFF file */ |
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| 360 | pkt->stream_index = 0; |
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| 361 | pkt->duration = (res / st->codec->block_align) * aiff->block_duration; |
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| 362 | return 0; |
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| 363 | } |
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| 364 | |||
| 365 | AVInputFormat ff_aiff_demuxer = { |
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| 366 | .name = "aiff", |
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| 367 | .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"), |
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| 368 | .priv_data_size = sizeof(AIFFInputContext), |
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| 369 | .read_probe = aiff_probe, |
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| 370 | .read_header = aiff_read_header, |
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| 371 | .read_packet = aiff_read_packet, |
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| 372 | .read_seek = ff_pcm_read_seek, |
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| 373 | .codec_tag = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 }, |
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| 374 | }; |