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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 2 | * RIFF muxing functions |
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| 3 | * Copyright (c) 2000 Fabrice Bellard |
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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/dict.h" |
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| 23 | #include "libavutil/log.h" |
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| 24 | #include "libavutil/mathematics.h" |
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| 25 | #include "libavcodec/avcodec.h" |
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| 26 | #include "libavcodec/bytestream.h" |
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| 27 | #include "avformat.h" |
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| 28 | #include "avio_internal.h" |
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| 29 | #include "riff.h" |
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| 30 | |||
| 31 | int64_t ff_start_tag(AVIOContext *pb, const char *tag) |
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| 32 | { |
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| 33 | ffio_wfourcc(pb, tag); |
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| 34 | avio_wl32(pb, 0); |
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| 35 | return avio_tell(pb); |
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| 36 | } |
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| 37 | |||
| 38 | void ff_end_tag(AVIOContext *pb, int64_t start) |
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| 39 | { |
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| 40 | int64_t pos; |
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| 41 | |||
| 42 | av_assert0((start&1) == 0); |
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| 43 | |||
| 44 | pos = avio_tell(pb); |
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| 45 | if (pos & 1) |
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| 46 | avio_w8(pb, 0); |
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| 47 | avio_seek(pb, start - 4, SEEK_SET); |
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| 48 | avio_wl32(pb, (uint32_t)(pos - start)); |
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| 49 | avio_seek(pb, FFALIGN(pos, 2), SEEK_SET); |
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| 50 | } |
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| 51 | |||
| 52 | /* WAVEFORMATEX header */ |
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| 53 | /* returns the size or -1 on error */ |
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| 54 | int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc) |
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| 55 | { |
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| 56 | int bps, blkalign, bytespersec, frame_size; |
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| 57 | int hdrsize = 18; |
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| 58 | int waveformatextensible; |
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| 59 | uint8_t temp[256]; |
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| 60 | uint8_t *riff_extradata = temp; |
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| 61 | uint8_t *riff_extradata_start = temp; |
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| 62 | |||
| 63 | if (!enc->codec_tag || enc->codec_tag > 0xffff) |
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| 64 | return -1; |
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| 65 | |||
| 66 | /* We use the known constant frame size for the codec if known, otherwise |
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| 67 | * fall back on using AVCodecContext.frame_size, which is not as reliable |
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| 68 | * for indicating packet duration. */ |
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| 69 | frame_size = av_get_audio_frame_duration(enc, 0); |
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| 70 | if (!frame_size) |
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| 71 | frame_size = enc->frame_size; |
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| 72 | |||
| 73 | waveformatextensible = (enc->channels > 2 && enc->channel_layout) || |
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| 74 | enc->sample_rate > 48000 || |
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| 75 | av_get_bits_per_sample(enc->codec_id) > 16; |
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| 76 | |||
| 77 | if (waveformatextensible) |
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| 78 | avio_wl16(pb, 0xfffe); |
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| 79 | else |
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| 80 | avio_wl16(pb, enc->codec_tag); |
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| 81 | |||
| 82 | avio_wl16(pb, enc->channels); |
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| 83 | avio_wl32(pb, enc->sample_rate); |
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| 84 | if (enc->codec_id == AV_CODEC_ID_ATRAC3 || |
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| 85 | enc->codec_id == AV_CODEC_ID_G723_1 || |
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| 86 | enc->codec_id == AV_CODEC_ID_MP2 || |
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| 87 | enc->codec_id == AV_CODEC_ID_MP3 || |
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| 88 | enc->codec_id == AV_CODEC_ID_GSM_MS) { |
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| 89 | bps = 0; |
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| 90 | } else { |
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| 91 | if (!(bps = av_get_bits_per_sample(enc->codec_id))) { |
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| 92 | if (enc->bits_per_coded_sample) |
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| 93 | bps = enc->bits_per_coded_sample; |
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| 94 | else |
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| 95 | bps = 16; // default to 16 |
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| 96 | } |
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| 97 | } |
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| 98 | if (bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample) { |
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| 99 | av_log(enc, AV_LOG_WARNING, |
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| 100 | "requested bits_per_coded_sample (%d) " |
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| 101 | "and actually stored (%d) differ\n", |
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| 102 | enc->bits_per_coded_sample, bps); |
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| 103 | } |
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| 104 | |||
| 105 | if (enc->codec_id == AV_CODEC_ID_MP2 || |
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| 106 | enc->codec_id == AV_CODEC_ID_MP3) { |
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| 107 | /* This is wrong, but it seems many demuxers do not work if this |
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| 108 | * is set correctly. */ |
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| 109 | blkalign = frame_size; |
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| 110 | // blkalign = 144 * enc->bit_rate/enc->sample_rate; |
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| 111 | } else if (enc->codec_id == AV_CODEC_ID_AC3) { |
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| 112 | blkalign = 3840; /* maximum bytes per frame */ |
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| 113 | } else if (enc->codec_id == AV_CODEC_ID_AAC) { |
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| 114 | blkalign = 768 * enc->channels; /* maximum bytes per frame */ |
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| 115 | } else if (enc->codec_id == AV_CODEC_ID_G723_1) { |
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| 116 | blkalign = 24; |
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| 117 | } else if (enc->block_align != 0) { /* specified by the codec */ |
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| 118 | blkalign = enc->block_align; |
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| 119 | } else |
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| 120 | blkalign = bps * enc->channels / av_gcd(8, bps); |
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| 121 | if (enc->codec_id == AV_CODEC_ID_PCM_U8 || |
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| 122 | enc->codec_id == AV_CODEC_ID_PCM_S24LE || |
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| 123 | enc->codec_id == AV_CODEC_ID_PCM_S32LE || |
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| 124 | enc->codec_id == AV_CODEC_ID_PCM_F32LE || |
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| 125 | enc->codec_id == AV_CODEC_ID_PCM_F64LE || |
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| 126 | enc->codec_id == AV_CODEC_ID_PCM_S16LE) { |
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| 127 | bytespersec = enc->sample_rate * blkalign; |
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| 128 | } else if (enc->codec_id == AV_CODEC_ID_G723_1) { |
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| 129 | bytespersec = 800; |
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| 130 | } else { |
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| 131 | bytespersec = enc->bit_rate / 8; |
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| 132 | } |
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| 133 | avio_wl32(pb, bytespersec); /* bytes per second */ |
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| 134 | avio_wl16(pb, blkalign); /* block align */ |
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| 135 | avio_wl16(pb, bps); /* bits per sample */ |
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| 136 | if (enc->codec_id == AV_CODEC_ID_MP3) { |
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| 137 | hdrsize += 12; |
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| 138 | bytestream_put_le16(&riff_extradata, 1); /* wID */ |
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| 139 | bytestream_put_le32(&riff_extradata, 2); /* fdwFlags */ |
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| 140 | bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */ |
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| 141 | bytestream_put_le16(&riff_extradata, 1); /* nFramesPerBlock */ |
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| 142 | bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */ |
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| 143 | } else if (enc->codec_id == AV_CODEC_ID_MP2) { |
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| 144 | hdrsize += 22; |
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| 145 | /* fwHeadLayer */ |
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| 146 | bytestream_put_le16(&riff_extradata, 2); |
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| 147 | /* dwHeadBitrate */ |
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| 148 | bytestream_put_le32(&riff_extradata, enc->bit_rate); |
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| 149 | /* fwHeadMode */ |
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| 150 | bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8); |
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| 151 | /* fwHeadModeExt */ |
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| 152 | bytestream_put_le16(&riff_extradata, 0); |
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| 153 | /* wHeadEmphasis */ |
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| 154 | bytestream_put_le16(&riff_extradata, 1); |
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| 155 | /* fwHeadFlags */ |
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| 156 | bytestream_put_le16(&riff_extradata, 16); |
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| 157 | /* dwPTSLow */ |
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| 158 | bytestream_put_le32(&riff_extradata, 0); |
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| 159 | /* dwPTSHigh */ |
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| 160 | bytestream_put_le32(&riff_extradata, 0); |
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| 161 | } else if (enc->codec_id == AV_CODEC_ID_G723_1) { |
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| 162 | hdrsize += 20; |
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| 163 | bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */ |
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| 164 | bytestream_put_le32(&riff_extradata, 0xaea2f732); |
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| 165 | bytestream_put_le16(&riff_extradata, 0xacde); |
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| 166 | } else if (enc->codec_id == AV_CODEC_ID_GSM_MS || |
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| 167 | enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) { |
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| 168 | hdrsize += 2; |
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| 169 | /* wSamplesPerBlock */ |
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| 170 | bytestream_put_le16(&riff_extradata, frame_size); |
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| 171 | } else if (enc->extradata_size) { |
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| 172 | riff_extradata_start = enc->extradata; |
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| 173 | riff_extradata = enc->extradata + enc->extradata_size; |
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| 174 | hdrsize += enc->extradata_size; |
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| 175 | } |
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| 176 | /* write WAVEFORMATEXTENSIBLE extensions */ |
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| 177 | if (waveformatextensible) { |
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| 178 | hdrsize += 22; |
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| 179 | /* 22 is WAVEFORMATEXTENSIBLE size */ |
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| 180 | avio_wl16(pb, riff_extradata - riff_extradata_start + 22); |
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| 181 | /* ValidBitsPerSample || SamplesPerBlock || Reserved */ |
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| 182 | avio_wl16(pb, bps); |
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| 183 | /* dwChannelMask */ |
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| 184 | avio_wl32(pb, enc->channel_layout); |
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| 185 | /* GUID + next 3 */ |
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| 186 | avio_wl32(pb, enc->codec_tag); |
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| 187 | avio_wl32(pb, 0x00100000); |
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| 188 | avio_wl32(pb, 0xAA000080); |
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| 189 | avio_wl32(pb, 0x719B3800); |
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| 190 | } else { |
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| 191 | avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */ |
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| 192 | } |
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| 193 | avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start); |
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| 194 | if (hdrsize & 1) { |
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| 195 | hdrsize++; |
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| 196 | avio_w8(pb, 0); |
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| 197 | } |
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| 198 | |||
| 199 | return hdrsize; |
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| 200 | } |
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| 201 | |||
| 202 | /* BITMAPINFOHEADER header */ |
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| 203 | void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, |
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| 204 | const AVCodecTag *tags, int for_asf) |
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| 205 | { |
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| 206 | /* size */ |
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| 207 | avio_wl32(pb, 40 + enc->extradata_size); |
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| 208 | avio_wl32(pb, enc->width); |
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| 209 | //We always store RGB TopDown |
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| 210 | avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height); |
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| 211 | /* planes */ |
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| 212 | avio_wl16(pb, 1); |
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| 213 | /* depth */ |
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| 214 | avio_wl16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24); |
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| 215 | /* compression type */ |
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| 216 | avio_wl32(pb, enc->codec_tag); |
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| 217 | avio_wl32(pb, (enc->width * enc->height * (enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24)+7) / 8); |
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| 218 | avio_wl32(pb, 0); |
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| 219 | avio_wl32(pb, 0); |
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| 220 | avio_wl32(pb, 0); |
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| 221 | avio_wl32(pb, 0); |
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| 222 | |||
| 223 | avio_write(pb, enc->extradata, enc->extradata_size); |
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| 224 | |||
| 225 | if (!for_asf && enc->extradata_size & 1) |
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| 226 | avio_w8(pb, 0); |
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| 227 | } |
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| 228 | |||
| 229 | void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, |
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| 230 | int *au_ssize, int *au_scale) |
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| 231 | { |
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| 232 | int gcd; |
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| 233 | int audio_frame_size; |
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| 234 | |||
| 235 | /* We use the known constant frame size for the codec if known, otherwise |
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| 236 | * fall back on using AVCodecContext.frame_size, which is not as reliable |
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| 237 | * for indicating packet duration. */ |
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| 238 | audio_frame_size = av_get_audio_frame_duration(stream, 0); |
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| 239 | if (!audio_frame_size) |
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| 240 | audio_frame_size = stream->frame_size; |
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| 241 | |||
| 242 | *au_ssize = stream->block_align; |
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| 243 | if (audio_frame_size && stream->sample_rate) { |
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| 244 | *au_scale = audio_frame_size; |
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| 245 | *au_rate = stream->sample_rate; |
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| 246 | } else if (stream->codec_type == AVMEDIA_TYPE_VIDEO || |
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| 247 | stream->codec_type == AVMEDIA_TYPE_DATA || |
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| 248 | stream->codec_type == AVMEDIA_TYPE_SUBTITLE) { |
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| 249 | *au_scale = stream->time_base.num; |
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| 250 | *au_rate = stream->time_base.den; |
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| 251 | } else { |
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| 252 | *au_scale = stream->block_align ? stream->block_align * 8 : 8; |
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| 253 | *au_rate = stream->bit_rate ? stream->bit_rate : |
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| 254 | 8 * stream->sample_rate; |
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| 255 | } |
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| 256 | gcd = av_gcd(*au_scale, *au_rate); |
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| 257 | *au_scale /= gcd; |
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| 258 | *au_rate /= gcd; |
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| 259 | } |
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| 260 | |||
| 261 | void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str) |
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| 262 | { |
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| 263 | int len = strlen(str); |
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| 264 | if (len > 0) { |
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| 265 | len++; |
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| 266 | ffio_wfourcc(pb, tag); |
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| 267 | avio_wl32(pb, len); |
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| 268 | avio_put_str(pb, str); |
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| 269 | if (len & 1) |
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| 270 | avio_w8(pb, 0); |
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| 271 | } |
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| 272 | } |
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| 273 | |||
| 274 | static const char riff_tags[][5] = { |
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| 275 | "IARL", "IART", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI", |
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| 276 | "IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD", |
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| 277 | "IPRT", "ITRK", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH", |
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| 278 | { 0 } |
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| 279 | }; |
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| 280 | |||
| 281 | static int riff_has_valid_tags(AVFormatContext *s) |
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| 282 | { |
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| 283 | int i; |
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| 284 | |||
| 285 | for (i = 0; *riff_tags[i]; i++) |
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| 286 | if (av_dict_get(s->metadata, riff_tags[i], NULL, AV_DICT_MATCH_CASE)) |
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| 287 | return 1; |
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| 288 | |||
| 289 | return 0; |
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| 290 | } |
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| 291 | |||
| 292 | void ff_riff_write_info(AVFormatContext *s) |
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| 293 | { |
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| 294 | AVIOContext *pb = s->pb; |
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| 295 | int i; |
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| 296 | int64_t list_pos; |
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| 297 | AVDictionaryEntry *t = NULL; |
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| 298 | |||
| 299 | ff_metadata_conv(&s->metadata, ff_riff_info_conv, NULL); |
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| 300 | |||
| 301 | /* writing empty LIST is not nice and may cause problems */ |
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| 302 | if (!riff_has_valid_tags(s)) |
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| 303 | return; |
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| 304 | |||
| 305 | list_pos = ff_start_tag(pb, "LIST"); |
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| 306 | ffio_wfourcc(pb, "INFO"); |
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| 307 | for (i = 0; *riff_tags[i]; i++) |
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| 308 | if ((t = av_dict_get(s->metadata, riff_tags[i], |
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| 309 | NULL, AV_DICT_MATCH_CASE))) |
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| 310 | ff_riff_write_info_tag(s->pb, t->key, t->value); |
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| 311 | ff_end_tag(pb, list_pos); |
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| 312 | } |