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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 2 | * Core Audio Format muxer |
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| 3 | * Copyright (c) 2011 Carl Eugen Hoyos |
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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 "avformat.h" |
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| 23 | #include "caf.h" |
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| 24 | #include "isom.h" |
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| 25 | #include "avio_internal.h" |
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| 26 | #include "libavutil/intfloat.h" |
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| 27 | #include "libavutil/dict.h" |
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| 28 | |||
| 29 | typedef struct { |
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| 30 | int64_t data; |
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| 31 | uint8_t *pkt_sizes; |
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| 32 | int size_buffer_size; |
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| 33 | int size_entries_used; |
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| 34 | int packets; |
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| 35 | } CAFContext; |
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| 36 | |||
| 37 | static uint32_t codec_flags(enum AVCodecID codec_id) { |
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| 38 | switch (codec_id) { |
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| 39 | case AV_CODEC_ID_PCM_F32BE: |
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| 40 | case AV_CODEC_ID_PCM_F64BE: |
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| 41 | return 1; //< kCAFLinearPCMFormatFlagIsFloat |
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| 42 | case AV_CODEC_ID_PCM_S16LE: |
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| 43 | case AV_CODEC_ID_PCM_S24LE: |
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| 44 | case AV_CODEC_ID_PCM_S32LE: |
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| 45 | return 2; //< kCAFLinearPCMFormatFlagIsLittleEndian |
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| 46 | case AV_CODEC_ID_PCM_F32LE: |
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| 47 | case AV_CODEC_ID_PCM_F64LE: |
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| 48 | return 3; //< kCAFLinearPCMFormatFlagIsFloat | kCAFLinearPCMFormatFlagIsLittleEndian |
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| 49 | default: |
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| 50 | return 0; |
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| 51 | } |
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| 52 | } |
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| 53 | |||
| 54 | static uint32_t samples_per_packet(enum AVCodecID codec_id, int channels) { |
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| 55 | switch (codec_id) { |
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| 56 | case AV_CODEC_ID_PCM_S8: |
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| 57 | case AV_CODEC_ID_PCM_S16LE: |
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| 58 | case AV_CODEC_ID_PCM_S16BE: |
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| 59 | case AV_CODEC_ID_PCM_S24LE: |
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| 60 | case AV_CODEC_ID_PCM_S24BE: |
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| 61 | case AV_CODEC_ID_PCM_S32LE: |
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| 62 | case AV_CODEC_ID_PCM_S32BE: |
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| 63 | case AV_CODEC_ID_PCM_F32LE: |
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| 64 | case AV_CODEC_ID_PCM_F32BE: |
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| 65 | case AV_CODEC_ID_PCM_F64LE: |
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| 66 | case AV_CODEC_ID_PCM_F64BE: |
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| 67 | case AV_CODEC_ID_PCM_ALAW: |
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| 68 | case AV_CODEC_ID_PCM_MULAW: |
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| 69 | return 1; |
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| 70 | case AV_CODEC_ID_MACE3: |
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| 71 | case AV_CODEC_ID_MACE6: |
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| 72 | return 6; |
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| 73 | case AV_CODEC_ID_ADPCM_IMA_QT: |
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| 74 | return 64; |
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| 75 | case AV_CODEC_ID_AMR_NB: |
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| 76 | case AV_CODEC_ID_GSM: |
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| 77 | case AV_CODEC_ID_ILBC: |
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| 78 | case AV_CODEC_ID_QCELP: |
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| 79 | return 160; |
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| 80 | case AV_CODEC_ID_GSM_MS: |
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| 81 | return 320; |
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| 82 | case AV_CODEC_ID_MP1: |
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| 83 | return 384; |
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| 84 | case AV_CODEC_ID_MP2: |
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| 85 | case AV_CODEC_ID_MP3: |
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| 86 | return 1152; |
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| 87 | case AV_CODEC_ID_AC3: |
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| 88 | return 1536; |
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| 89 | case AV_CODEC_ID_QDM2: |
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| 90 | return 2048 * channels; |
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| 91 | case AV_CODEC_ID_ALAC: |
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| 92 | return 4096; |
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| 93 | case AV_CODEC_ID_ADPCM_IMA_WAV: |
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| 94 | return (1024 - 4 * channels) * 8 / (4 * channels) + 1; |
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| 95 | case AV_CODEC_ID_ADPCM_MS: |
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| 96 | return (1024 - 7 * channels) * 2 / channels + 2; |
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| 97 | default: |
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| 98 | return 0; |
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| 99 | } |
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| 100 | } |
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| 101 | |||
| 102 | static int caf_write_header(AVFormatContext *s) |
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| 103 | { |
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| 104 | AVIOContext *pb = s->pb; |
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| 105 | AVCodecContext *enc = s->streams[0]->codec; |
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| 106 | CAFContext *caf = s->priv_data; |
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| 107 | AVDictionaryEntry *t = NULL; |
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| 108 | unsigned int codec_tag = ff_codec_get_tag(ff_codec_caf_tags, enc->codec_id); |
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| 109 | int64_t chunk_size = 0; |
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| 110 | |||
| 111 | switch (enc->codec_id) { |
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| 112 | case AV_CODEC_ID_AAC: |
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| 113 | case AV_CODEC_ID_AC3: |
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| 114 | av_log(s, AV_LOG_ERROR, "muxing codec currently unsupported\n"); |
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| 115 | return AVERROR_PATCHWELCOME; |
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| 116 | } |
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| 117 | |||
| 118 | switch (enc->codec_id) { |
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| 119 | case AV_CODEC_ID_PCM_S8: |
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| 120 | case AV_CODEC_ID_PCM_S16LE: |
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| 121 | case AV_CODEC_ID_PCM_S16BE: |
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| 122 | case AV_CODEC_ID_PCM_S24LE: |
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| 123 | case AV_CODEC_ID_PCM_S24BE: |
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| 124 | case AV_CODEC_ID_PCM_S32LE: |
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| 125 | case AV_CODEC_ID_PCM_S32BE: |
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| 126 | case AV_CODEC_ID_PCM_F32LE: |
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| 127 | case AV_CODEC_ID_PCM_F32BE: |
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| 128 | case AV_CODEC_ID_PCM_F64LE: |
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| 129 | case AV_CODEC_ID_PCM_F64BE: |
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| 130 | case AV_CODEC_ID_PCM_ALAW: |
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| 131 | case AV_CODEC_ID_PCM_MULAW: |
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| 132 | codec_tag = MKTAG('l','p','c','m'); |
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| 133 | } |
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| 134 | |||
| 135 | if (!codec_tag) { |
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| 136 | av_log(s, AV_LOG_ERROR, "unsupported codec\n"); |
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| 137 | return AVERROR_INVALIDDATA; |
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| 138 | } |
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| 139 | |||
| 140 | if (!enc->block_align && !pb->seekable) { |
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| 141 | av_log(s, AV_LOG_ERROR, "Muxing variable packet size not supported on non seekable output\n"); |
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| 142 | return AVERROR_INVALIDDATA; |
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| 143 | } |
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| 144 | |||
| 145 | ffio_wfourcc(pb, "caff"); //< mFileType |
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| 146 | avio_wb16(pb, 1); //< mFileVersion |
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| 147 | avio_wb16(pb, 0); //< mFileFlags |
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| 148 | |||
| 149 | ffio_wfourcc(pb, "desc"); //< Audio Description chunk |
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| 150 | avio_wb64(pb, 32); //< mChunkSize |
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| 151 | avio_wb64(pb, av_double2int(enc->sample_rate)); //< mSampleRate |
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| 152 | avio_wl32(pb, codec_tag); //< mFormatID |
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| 153 | avio_wb32(pb, codec_flags(enc->codec_id)); //< mFormatFlags |
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| 154 | avio_wb32(pb, enc->block_align); //< mBytesPerPacket |
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| 155 | avio_wb32(pb, samples_per_packet(enc->codec_id, enc->channels)); //< mFramesPerPacket |
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| 156 | avio_wb32(pb, enc->channels); //< mChannelsPerFrame |
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| 157 | avio_wb32(pb, av_get_bits_per_sample(enc->codec_id)); //< mBitsPerChannel |
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| 158 | |||
| 159 | if (enc->channel_layout) { |
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| 160 | ffio_wfourcc(pb, "chan"); |
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| 161 | avio_wb64(pb, 12); |
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| 162 | ff_mov_write_chan(pb, enc->channel_layout); |
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| 163 | } |
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| 164 | |||
| 165 | if (enc->codec_id == AV_CODEC_ID_ALAC) { |
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| 166 | ffio_wfourcc(pb, "kuki"); |
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| 167 | avio_wb64(pb, 12 + enc->extradata_size); |
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| 168 | avio_write(pb, "\0\0\0\14frmaalac", 12); |
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| 169 | avio_write(pb, enc->extradata, enc->extradata_size); |
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| 170 | } else if (enc->codec_id == AV_CODEC_ID_AMR_NB) { |
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| 171 | ffio_wfourcc(pb, "kuki"); |
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| 172 | avio_wb64(pb, 29); |
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| 173 | avio_write(pb, "\0\0\0\14frmasamr", 12); |
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| 174 | avio_wb32(pb, 0x11); /* size */ |
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| 175 | avio_write(pb, "samrFFMP", 8); |
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| 176 | avio_w8(pb, 0); /* decoder version */ |
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| 177 | |||
| 178 | avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */ |
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| 179 | avio_w8(pb, 0x00); /* Mode change period (no restriction) */ |
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| 180 | avio_w8(pb, 0x01); /* Frames per sample */ |
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| 181 | } else if (enc->codec_id == AV_CODEC_ID_QDM2) { |
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| 182 | ffio_wfourcc(pb, "kuki"); |
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| 183 | avio_wb64(pb, enc->extradata_size); |
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| 184 | avio_write(pb, enc->extradata, enc->extradata_size); |
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| 185 | } |
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| 186 | |||
| 187 | if (av_dict_count(s->metadata)) { |
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| 188 | ffio_wfourcc(pb, "info"); //< Information chunk |
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| 189 | while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) { |
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| 190 | chunk_size += strlen(t->key) + strlen(t->value) + 2; |
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| 191 | } |
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| 192 | avio_wb64(pb, chunk_size + 4); |
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| 193 | avio_wb32(pb, av_dict_count(s->metadata)); |
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| 194 | t = NULL; |
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| 195 | while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) { |
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| 196 | avio_put_str(pb, t->key); |
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| 197 | avio_put_str(pb, t->value); |
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| 198 | } |
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| 199 | } |
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| 200 | |||
| 201 | ffio_wfourcc(pb, "data"); //< Audio Data chunk |
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| 202 | caf->data = avio_tell(pb); |
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| 203 | avio_wb64(pb, -1); //< mChunkSize |
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| 204 | avio_wb32(pb, 0); //< mEditCount |
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| 205 | |||
| 206 | avio_flush(pb); |
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| 207 | return 0; |
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| 208 | } |
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| 209 | |||
| 210 | static int caf_write_packet(AVFormatContext *s, AVPacket *pkt) |
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| 211 | { |
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| 212 | CAFContext *caf = s->priv_data; |
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| 213 | |||
| 214 | avio_write(s->pb, pkt->data, pkt->size); |
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| 215 | if (!s->streams[0]->codec->block_align) { |
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| 216 | void *pkt_sizes = caf->pkt_sizes; |
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| 217 | int i, alloc_size = caf->size_entries_used + 5; |
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| 218 | if (alloc_size < 0) { |
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| 219 | caf->pkt_sizes = NULL; |
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| 220 | } else { |
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| 221 | caf->pkt_sizes = av_fast_realloc(caf->pkt_sizes, |
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| 222 | &caf->size_buffer_size, |
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| 223 | alloc_size); |
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| 224 | } |
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| 225 | if (!caf->pkt_sizes) { |
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| 226 | av_free(pkt_sizes); |
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| 227 | return AVERROR(ENOMEM); |
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| 228 | } |
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| 229 | for (i = 4; i > 0; i--) { |
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| 230 | unsigned top = pkt->size >> i * 7; |
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| 231 | if (top) |
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| 232 | caf->pkt_sizes[caf->size_entries_used++] = 128 | top; |
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| 233 | } |
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| 234 | caf->pkt_sizes[caf->size_entries_used++] = pkt->size & 127; |
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| 235 | caf->packets++; |
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| 236 | } |
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| 237 | return 0; |
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| 238 | } |
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| 239 | |||
| 240 | static int caf_write_trailer(AVFormatContext *s) |
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| 241 | { |
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| 242 | CAFContext *caf = s->priv_data; |
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| 243 | AVIOContext *pb = s->pb; |
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| 244 | AVCodecContext *enc = s->streams[0]->codec; |
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| 245 | |||
| 246 | if (pb->seekable) { |
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| 247 | int64_t file_size = avio_tell(pb); |
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| 248 | |||
| 249 | avio_seek(pb, caf->data, SEEK_SET); |
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| 250 | avio_wb64(pb, file_size - caf->data - 8); |
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| 251 | avio_seek(pb, file_size, SEEK_SET); |
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| 252 | if (!enc->block_align) { |
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| 253 | ffio_wfourcc(pb, "pakt"); |
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| 254 | avio_wb64(pb, caf->size_entries_used + 24); |
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| 255 | avio_wb64(pb, caf->packets); ///< mNumberPackets |
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| 256 | avio_wb64(pb, caf->packets * samples_per_packet(enc->codec_id, enc->channels)); ///< mNumberValidFrames |
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| 257 | avio_wb32(pb, 0); ///< mPrimingFrames |
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| 258 | avio_wb32(pb, 0); ///< mRemainderFrames |
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| 259 | avio_write(pb, caf->pkt_sizes, caf->size_entries_used); |
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| 260 | caf->size_buffer_size = 0; |
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| 261 | } |
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| 262 | avio_flush(pb); |
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| 263 | } |
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| 264 | av_freep(&caf->pkt_sizes); |
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| 265 | return 0; |
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| 266 | } |
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| 267 | |||
| 268 | AVOutputFormat ff_caf_muxer = { |
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| 269 | .name = "caf", |
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| 270 | .long_name = NULL_IF_CONFIG_SMALL("Apple CAF (Core Audio Format)"), |
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| 271 | .mime_type = "audio/x-caf", |
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| 272 | .extensions = "caf", |
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| 273 | .priv_data_size = sizeof(CAFContext), |
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| 274 | .audio_codec = AV_CODEC_ID_PCM_S16BE, |
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| 275 | .video_codec = AV_CODEC_ID_NONE, |
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| 276 | .write_header = caf_write_header, |
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| 277 | .write_packet = caf_write_packet, |
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| 278 | .write_trailer = caf_write_trailer, |
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| 279 | .codec_tag = (const AVCodecTag* const []){ff_codec_caf_tags, 0}, |
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| 280 | }; |