| 1 | /* |
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| 2 | * FFissionDecoder.cpp |
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| 3 | * |
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| 4 | * Copyright (c) 2006 David Conrad |
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| 5 | * |
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| 6 | * This program is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; |
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| 9 | * version 2.1 of the License. |
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| 10 | * |
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| 11 | * This program is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with this program; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | * |
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| 20 | */ |
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| 21 | |
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| 22 | #include "FFissionDecoder.h" |
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| 23 | #include "ACCodecDispatch.h" |
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| 24 | #include "FFusionCodec.h" |
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| 25 | #include "Codecprintf.h" |
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| 26 | #include "CodecIDs.h" |
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| 27 | |
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| 28 | typedef struct CookieAtomHeader { |
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| 29 | long size; |
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| 30 | long type; |
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| 31 | unsigned char data[1]; |
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| 32 | } CookieAtomHeader; |
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| 33 | |
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| 34 | struct CodecPair { |
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| 35 | OSType mFormatID; |
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| 36 | CodecID codecID; |
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| 37 | }; |
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| 38 | |
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| 39 | static const CodecPair kAllInputFormats[] = |
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| 40 | { |
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| 41 | { kAudioFormatWMA1MS, CODEC_ID_WMAV1 }, |
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| 42 | { kAudioFormatWMA2MS, CODEC_ID_WMAV2 }, |
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| 43 | { kAudioFormatFlashADPCM, CODEC_ID_ADPCM_SWF }, |
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| 44 | { kAudioFormatXiphVorbis, CODEC_ID_VORBIS }, |
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| 45 | { kAudioFormatMPEGLayer2, CODEC_ID_MP2 }, |
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| 46 | { kAudioFormatMPEGLayer1, CODEC_ID_MP2 }, |
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| 47 | { 0x6d730050, CODEC_ID_MP2 }, |
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| 48 | { kAudioFormatTTA, CODEC_ID_TTA }, |
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| 49 | { kAudioFormatDTS, CODEC_ID_DTS }, |
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| 50 | { kAudioFormatNellymoser, CODEC_ID_NELLYMOSER }, |
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| 51 | { 0, CODEC_ID_NONE } |
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| 52 | }; |
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| 53 | |
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| 54 | static CodecID GetCodecID(OSType formatID) |
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| 55 | { |
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| 56 | for (int i = 0; kAllInputFormats[i].codecID != CODEC_ID_NONE; i++) { |
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| 57 | if (kAllInputFormats[i].mFormatID == formatID) |
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| 58 | return kAllInputFormats[i].codecID; |
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| 59 | } |
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| 60 | return CODEC_ID_NONE; |
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| 61 | } |
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| 62 | |
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| 63 | |
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| 64 | FFissionDecoder::FFissionDecoder(UInt32 inInputBufferByteSize) : FFissionCodec(0) |
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| 65 | { |
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| 66 | kIntPCMOutFormatFlag = kLinearPCMFormatFlagIsSignedInteger | kAudioFormatFlagsNativeEndian | kLinearPCMFormatFlagIsPacked; |
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| 67 | magicCookie = NULL; |
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| 68 | magicCookieSize = 0; |
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| 69 | |
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| 70 | for (int i = 0; kAllInputFormats[i].codecID != CODEC_ID_NONE; i++) { |
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| 71 | CAStreamBasicDescription theInputFormat(kAudioStreamAnyRate, kAllInputFormats[i].mFormatID, 0, 1, 0, 0, 0, 0); |
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| 72 | AddInputFormat(theInputFormat); |
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| 73 | } |
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| 74 | |
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| 75 | // libavcodec outputs 16-bit native-endian integer pcm, so why do conversions ourselves? |
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| 76 | CAStreamBasicDescription theOutputFormat(kAudioStreamAnyRate, kAudioFormatLinearPCM, 0, 1, 0, 0, 16, kIntPCMOutFormatFlag); |
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| 77 | AddOutputFormat(theOutputFormat); |
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| 78 | |
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| 79 | inputBuffer.Initialize(inInputBufferByteSize); |
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| 80 | outBufUsed = 0; |
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| 81 | outBufSize = AVCODEC_MAX_AUDIO_FRAME_SIZE; |
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| 82 | outputBuffer = new Byte[outBufSize]; |
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| 83 | } |
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| 84 | |
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| 85 | FFissionDecoder::~FFissionDecoder() |
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| 86 | { |
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| 87 | if (magicCookie) |
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| 88 | delete[] magicCookie; |
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| 89 | |
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| 90 | delete[] outputBuffer; |
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| 91 | } |
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| 92 | |
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| 93 | void FFissionDecoder::Initialize(const AudioStreamBasicDescription* inInputFormat, const AudioStreamBasicDescription* inOutputFormat, const void* inMagicCookie, UInt32 inMagicCookieByteSize) |
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| 94 | { |
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| 95 | if (inMagicCookieByteSize > 0) |
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| 96 | SetMagicCookie(inMagicCookie, inMagicCookieByteSize); |
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| 97 | |
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| 98 | FFissionCodec::Initialize(inInputFormat, inOutputFormat, inMagicCookie, inMagicCookieByteSize); |
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| 99 | } |
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| 100 | |
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| 101 | void FFissionDecoder::Uninitialize() |
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| 102 | { |
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| 103 | outBufUsed = 0; |
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| 104 | inputBuffer.Zap(inputBuffer.GetDataAvailable()); |
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| 105 | |
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| 106 | FFissionCodec::Uninitialize(); |
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| 107 | } |
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| 108 | |
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| 109 | void FFissionDecoder::Reset() |
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| 110 | { |
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| 111 | outBufUsed = 0; |
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| 112 | inputBuffer.Zap(inputBuffer.GetDataAvailable()); |
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| 113 | |
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| 114 | FFissionCodec::Reset(); |
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| 115 | } |
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| 116 | |
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| 117 | void FFissionDecoder::SetMagicCookie(const void* inMagicCookieData, UInt32 inMagicCookieDataByteSize) |
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| 118 | { |
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| 119 | if (magicCookie) |
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| 120 | delete[] magicCookie; |
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| 121 | |
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| 122 | magicCookieSize = inMagicCookieDataByteSize; |
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| 123 | |
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| 124 | if (magicCookieSize > 0) { |
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| 125 | magicCookie = new Byte[magicCookieSize + FF_INPUT_BUFFER_PADDING_SIZE]; |
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| 126 | memcpy(magicCookie, inMagicCookieData, magicCookieSize); |
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| 127 | } else |
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| 128 | magicCookie = NULL; |
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| 129 | |
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| 130 | FFissionCodec::SetMagicCookie(inMagicCookieData, inMagicCookieDataByteSize); |
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| 131 | } |
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| 132 | |
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| 133 | void FFissionDecoder::SetupExtradata(OSType formatID) |
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| 134 | { |
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| 135 | if (!magicCookie) return; |
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| 136 | |
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| 137 | switch (formatID) { |
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| 138 | case kAudioFormatWMA1MS: |
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| 139 | case kAudioFormatWMA2MS: |
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| 140 | case kAudioFormatTTA: |
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| 141 | if (magicCookieSize < 12 + 18 + 8 + 8) |
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| 142 | return; |
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| 143 | |
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| 144 | avContext->extradata = magicCookie + 12 + 18 + 8; |
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| 145 | avContext->extradata_size = magicCookieSize - 12 - 18 - 8 - 8; |
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| 146 | break; |
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| 147 | |
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| 148 | case kAudioFormatXiphVorbis: |
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| 149 | avContext->extradata_size = ConvertXiphVorbisCookie(); |
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| 150 | avContext->extradata = magicCookie; |
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| 151 | break; |
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| 152 | |
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| 153 | default: |
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| 154 | return; |
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| 155 | } |
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| 156 | |
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| 157 | // this is safe because we always allocate this amount of additional memory for our copy of the magic cookie |
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| 158 | memset(avContext->extradata + avContext->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
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| 159 | } |
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| 160 | |
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| 161 | int FFissionDecoder::ConvertXiphVorbisCookie() |
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| 162 | { |
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| 163 | Byte *ptr = magicCookie; |
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| 164 | Byte *cend = magicCookie + magicCookieSize; |
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| 165 | Byte *headerData[3] = {NULL}; |
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| 166 | int headerSize[3] = {0}; |
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| 167 | |
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| 168 | while (ptr < cend) { |
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| 169 | CookieAtomHeader *aheader = reinterpret_cast<CookieAtomHeader *>(ptr); |
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| 170 | int size = EndianU32_BtoN(aheader->size); |
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| 171 | ptr += size; |
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| 172 | if (ptr > cend || size <= 0) |
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| 173 | break; |
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| 174 | |
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| 175 | switch(EndianS32_BtoN(aheader->type)) { |
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| 176 | case kCookieTypeVorbisHeader: |
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| 177 | headerData[0] = aheader->data; |
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| 178 | headerSize[0] = size - 8; |
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| 179 | break; |
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| 180 | |
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| 181 | case kCookieTypeVorbisComments: |
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| 182 | headerData[1] = aheader->data; |
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| 183 | headerSize[1] = size - 8; |
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| 184 | break; |
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| 185 | |
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| 186 | case kCookieTypeVorbisCodebooks: |
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| 187 | headerData[2] = aheader->data; |
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| 188 | headerSize[2] = size - 8; |
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| 189 | break; |
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| 190 | } |
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| 191 | } |
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| 192 | |
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| 193 | if (headerSize[0] <= 0 || headerSize[1] <= 0 || headerSize[2] <= 0) { |
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| 194 | Codecprintf(NULL, "Invalid Vorbis extradata\n"); |
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| 195 | return 0; |
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| 196 | } |
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| 197 | |
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| 198 | int len = headerSize[0] + headerSize[1] + headerSize[2]; |
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| 199 | Byte *newCookie = new Byte[len + len/255 + 64]; |
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| 200 | ptr = newCookie; |
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| 201 | |
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| 202 | ptr[0] = 2; // number of packets minus 1 |
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| 203 | int offset = 1; |
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| 204 | offset += av_xiphlacing(&ptr[offset], headerSize[0]); |
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| 205 | offset += av_xiphlacing(&ptr[offset], headerSize[1]); |
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| 206 | for (int i = 0; i < 3; i++) { |
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| 207 | memcpy(&ptr[offset], headerData[i], headerSize[i]); |
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| 208 | offset += headerSize[i]; |
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| 209 | } |
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| 210 | |
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| 211 | delete[] magicCookie; |
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| 212 | magicCookie = newCookie; |
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| 213 | magicCookieSize = offset; |
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| 214 | |
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| 215 | return offset; |
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| 216 | } |
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| 217 | |
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| 218 | void FFissionDecoder::GetProperty(AudioCodecPropertyID inPropertyID, UInt32& ioPropertyDataSize, void* outPropertyData) { |
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| 219 | switch (inPropertyID) { |
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| 220 | case kAudioCodecPropertyNameCFString: |
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| 221 | if (ioPropertyDataSize != sizeof(CFStringRef)) |
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| 222 | CODEC_THROW(kAudioCodecBadPropertySizeError); |
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| 223 | break; |
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| 224 | |
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| 225 | case kAudioCodecPropertyInputBufferSize: |
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| 226 | case kAudioCodecPropertyUsedInputBufferSize: |
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| 227 | if (ioPropertyDataSize != sizeof(UInt32)) |
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| 228 | CODEC_THROW(kAudioCodecBadPropertySizeError); |
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| 229 | break; |
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| 230 | } |
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| 231 | |
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| 232 | switch (inPropertyID) { |
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| 233 | case kAudioCodecPropertyNameCFString: |
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| 234 | *(CFStringRef*)outPropertyData = CFCopyLocalizedStringFromTableInBundle(CFSTR("Perian FFmpeg audio decoder"), CFSTR("CodecNames"), GetCodecBundle(), CFSTR("")); |
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| 235 | break; |
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| 236 | |
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| 237 | case kAudioCodecPropertyInputBufferSize: |
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| 238 | *reinterpret_cast<UInt32*>(outPropertyData) = inputBuffer.GetBufferByteSize(); |
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| 239 | break; |
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| 240 | |
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| 241 | case kAudioCodecPropertyUsedInputBufferSize: |
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| 242 | *reinterpret_cast<UInt32*>(outPropertyData) = inputBuffer.GetDataAvailable(); |
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| 243 | break; |
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| 244 | |
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| 245 | default: |
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| 246 | FFissionCodec::GetProperty(inPropertyID, ioPropertyDataSize, outPropertyData); |
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| 247 | } |
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| 248 | } |
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| 249 | |
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| 250 | void FFissionDecoder::SetCurrentInputFormat(const AudioStreamBasicDescription& inInputFormat) |
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| 251 | { |
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| 252 | if(mIsInitialized) { |
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| 253 | CODEC_THROW(kAudioCodecStateError); |
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| 254 | } |
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| 255 | |
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| 256 | if (avCodec) { |
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| 257 | avcodec_close(avContext); |
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| 258 | avCodec = NULL; |
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| 259 | } |
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| 260 | |
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| 261 | CodecID codecID = GetCodecID(inInputFormat.mFormatID); |
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| 262 | |
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| 263 | // check to make sure the input format is legal |
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| 264 | if (avcodec_find_decoder(codecID) == NULL) { |
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| 265 | Codecprintf(NULL, "Unsupported input format id %4.4s\n", &inInputFormat.mFormatID); |
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| 266 | CODEC_THROW(kAudioCodecUnsupportedFormatError); |
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| 267 | } |
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| 268 | |
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| 269 | // tell our base class about the new format |
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| 270 | FFissionCodec::SetCurrentInputFormat(inInputFormat); |
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| 271 | } |
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| 272 | |
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| 273 | void FFissionDecoder::OpenAVCodec() |
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| 274 | { |
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| 275 | if (!mIsInitialized) |
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| 276 | CODEC_THROW(kAudioCodecStateError); |
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| 277 | |
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| 278 | CodecID codecID = GetCodecID(mInputFormat.mFormatID); |
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| 279 | |
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| 280 | avCodec = avcodec_find_decoder(codecID); |
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| 281 | |
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| 282 | avcodec_get_context_defaults(avContext); |
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| 283 | |
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| 284 | avContext->sample_rate = mInputFormat.mSampleRate; |
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| 285 | avContext->channels = mInputFormat.mChannelsPerFrame; |
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| 286 | avContext->block_align = mInputFormat.mBytesPerPacket; |
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| 287 | avContext->frame_size = mInputFormat.mFramesPerPacket; |
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| 288 | avContext->bits_per_coded_sample = mInputFormat.mBitsPerChannel; |
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| 289 | |
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| 290 | if (avContext->sample_rate == 0) { |
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| 291 | Codecprintf(NULL, "Invalid sample rate %d\n", avContext->sample_rate); |
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| 292 | avCodec = NULL; |
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| 293 | return; |
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| 294 | } |
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| 295 | |
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| 296 | if (magicCookie) { |
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| 297 | SetupExtradata(mInputFormat.mFormatID); |
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| 298 | } |
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| 299 | |
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| 300 | if (avcodec_open(avContext, avCodec)) { |
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| 301 | Codecprintf(NULL, "error opening audio avcodec\n"); |
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| 302 | avCodec = NULL; |
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| 303 | CODEC_THROW(kAudioCodecUnsupportedFormatError); |
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| 304 | } |
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| 305 | } |
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| 306 | |
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| 307 | void FFissionDecoder::SetCurrentOutputFormat(const AudioStreamBasicDescription& inOutputFormat) |
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| 308 | { |
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| 309 | if(mIsInitialized) { |
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| 310 | CODEC_THROW(kAudioCodecStateError); |
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| 311 | } |
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| 312 | |
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| 313 | // check to make sure the output format is legal |
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| 314 | if (inOutputFormat.mFormatID != kAudioFormatLinearPCM || |
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| 315 | inOutputFormat.mFormatFlags != kIntPCMOutFormatFlag || |
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| 316 | inOutputFormat.mBitsPerChannel != 16) |
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| 317 | { |
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| 318 | Codecprintf(NULL, "We only support 16 bit native endian signed integer for output\n"); |
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| 319 | CODEC_THROW(kAudioCodecUnsupportedFormatError); |
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| 320 | } |
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| 321 | |
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| 322 | // tell our base class about the new format |
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| 323 | FFissionCodec::SetCurrentOutputFormat(inOutputFormat); |
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| 324 | } |
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| 325 | |
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| 326 | void FFissionDecoder::AppendInputData(const void* inInputData, UInt32& ioInputDataByteSize, |
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| 327 | UInt32& ioNumberPackets, const AudioStreamPacketDescription* inPacketDescription) |
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| 328 | { |
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| 329 | const Byte *inData = (const Byte *)inInputData; |
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| 330 | |
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| 331 | if (inPacketDescription && ioNumberPackets) { |
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| 332 | for (int i = 0; i < ioNumberPackets; i++) { |
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| 333 | UInt32 packetSize = inPacketDescription[i].mDataByteSize; |
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| 334 | inputBuffer.In(inData + inPacketDescription[i].mStartOffset, packetSize); |
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| 335 | } |
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| 336 | } else if (mInputFormat.mBytesPerPacket != 0) { |
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| 337 | // no packet description, assume cbr |
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| 338 | UInt32 amountToCopy = FFMIN(mInputFormat.mBytesPerPacket * ioNumberPackets, ioInputDataByteSize); |
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| 339 | UInt32 numPackets = amountToCopy / mInputFormat.mBytesPerPacket; |
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| 340 | |
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| 341 | ioInputDataByteSize = amountToCopy; |
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| 342 | ioNumberPackets = numPackets; |
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| 343 | |
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| 344 | for (int i = 0; i < numPackets; i++) { |
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| 345 | UInt32 packetSize = mInputFormat.mBytesPerPacket; |
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| 346 | inputBuffer.In(inData, packetSize); |
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| 347 | inData += mInputFormat.mBytesPerPacket; |
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| 348 | } |
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| 349 | } else { |
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| 350 | // XiphQT throws this in this situation (we need packet descriptions, but don't get them) |
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| 351 | // is there a better error to throw? |
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| 352 | CODEC_THROW(kAudioCodecNotEnoughBufferSpaceError); |
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| 353 | } |
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| 354 | } |
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| 355 | |
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| 356 | UInt32 FFissionDecoder::ProduceOutputPackets(void* outOutputData, |
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| 357 | UInt32& ioOutputDataByteSize, // number of bytes written to outOutputData |
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| 358 | UInt32& ioNumberPackets, |
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| 359 | AudioStreamPacketDescription* outPacketDescription) |
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| 360 | { |
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| 361 | UInt32 ans; |
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| 362 | |
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| 363 | if (!avCodec) |
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| 364 | OpenAVCodec(); |
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| 365 | |
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| 366 | if (!mIsInitialized || !avCodec) |
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| 367 | CODEC_THROW(kAudioCodecStateError); |
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| 368 | |
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| 369 | UInt32 written = 0; |
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| 370 | Byte *outData = (Byte *) outOutputData; |
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| 371 | |
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| 372 | // we have leftovers from the last packet, use that first |
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| 373 | if (outBufUsed > 0) { |
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| 374 | int amountToCopy = FFMIN(outBufUsed, ioOutputDataByteSize); |
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| 375 | memcpy(outData, outputBuffer, amountToCopy); |
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| 376 | outBufUsed -= amountToCopy; |
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| 377 | written += amountToCopy; |
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| 378 | |
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| 379 | if (outBufUsed > 0) |
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| 380 | memmove(outputBuffer, outputBuffer + amountToCopy, outBufUsed); |
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| 381 | } |
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| 382 | |
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| 383 | // loop until we satisfy the request or run out of input data |
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| 384 | while (written < ioOutputDataByteSize && inputBuffer.GetNumPackets() > 0) { |
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| 385 | int packetSize = inputBuffer.GetCurrentPacketSize(); |
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| 386 | uint8_t *packet = inputBuffer.GetData(); |
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| 387 | |
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| 388 | // decode one packet to our buffer |
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| 389 | outBufUsed = outBufSize; |
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| 390 | int len = avcodec_decode_audio2(avContext, (int16_t *)outputBuffer, &outBufUsed, packet, packetSize); |
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| 391 | |
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| 392 | if (len < 0) { |
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| 393 | Codecprintf(NULL, "Error decoding audio frame\n"); |
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| 394 | inputBuffer.Zap(packetSize); |
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| 395 | outBufUsed = 0; |
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| 396 | ioOutputDataByteSize = written; |
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| 397 | ioNumberPackets = ioOutputDataByteSize / (2 * mOutputFormat.NumberChannels()); |
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| 398 | return kAudioCodecProduceOutputPacketFailure; |
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| 399 | } |
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| 400 | inputBuffer.Zap(len); |
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| 401 | |
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| 402 | // copy up to the amount requested |
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| 403 | int amountToCopy = FFMIN(outBufUsed, ioOutputDataByteSize - written); |
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| 404 | memcpy(outData + written, outputBuffer, amountToCopy); |
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| 405 | outBufUsed -= amountToCopy; |
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| 406 | written += amountToCopy; |
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| 407 | |
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| 408 | // and save what's left over |
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| 409 | if (outBufUsed > 0) |
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| 410 | memmove(outputBuffer, outputBuffer + amountToCopy, outBufUsed); |
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| 411 | } |
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| 412 | |
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| 413 | if (written < ioOutputDataByteSize) |
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| 414 | ans = kAudioCodecProduceOutputPacketNeedsMoreInputData; |
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| 415 | else if (inputBuffer.GetNumPackets() > 0) |
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| 416 | // we have an entire packet left to decode |
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| 417 | ans = kAudioCodecProduceOutputPacketSuccessHasMore; |
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| 418 | else |
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| 419 | ans = kAudioCodecProduceOutputPacketSuccess; |
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| 420 | |
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| 421 | ioOutputDataByteSize = written; |
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| 422 | ioNumberPackets = ioOutputDataByteSize / (2 * mOutputFormat.NumberChannels()); |
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| 423 | |
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| 424 | return ans; |
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| 425 | } |
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| 426 | |
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| 427 | UInt32 FFissionDecoder::GetVersion() const |
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| 428 | { |
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| 429 | return kFFusionCodecVersion; |
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| 430 | } |
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| 431 | |
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| 432 | // comment from XiphQT (variable frames per packet means FrameSize should be reported 0, |
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| 433 | // but apparently needs 1 on Intel?): |
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| 434 | /* The following line has been changed according to Apple engineers' suggestion |
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| 435 | I received via Steve Nicolai (in response to *my* bugreport, I think...). |
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| 436 | (Why don't they just implement the VBR-VFPP properly? *sigh*) */ |
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| 437 | #ifdef TARGET_CPU_X86 |
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| 438 | #define SHOULD_BE_ZERO 1 |
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| 439 | #else |
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| 440 | #define SHOULD_BE_ZERO 0 |
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| 441 | #endif |
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| 442 | |
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| 443 | void FFissionVBRDecoder::GetProperty(AudioCodecPropertyID inPropertyID, UInt32& ioPropertyDataSize, void* outPropertyData) |
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| 444 | { |
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| 445 | switch (inPropertyID) { |
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| 446 | case kAudioCodecPropertyPacketFrameSize: |
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| 447 | case kAudioCodecPropertyHasVariablePacketByteSizes: |
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| 448 | case kAudioCodecPropertyRequiresPacketDescription: |
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| 449 | if (ioPropertyDataSize != sizeof(UInt32)) |
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| 450 | CODEC_THROW(kAudioCodecBadPropertySizeError); |
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| 451 | break; |
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| 452 | } |
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| 453 | |
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| 454 | switch (inPropertyID) { |
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| 455 | case kAudioCodecPropertyPacketFrameSize: |
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| 456 | *reinterpret_cast<UInt32*>(outPropertyData) = SHOULD_BE_ZERO; |
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| 457 | break; |
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| 458 | |
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| 459 | case kAudioCodecPropertyHasVariablePacketByteSizes: |
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| 460 | case kAudioCodecPropertyRequiresPacketDescription: |
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| 461 | *reinterpret_cast<UInt32*>(outPropertyData) = true; |
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| 462 | break; |
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| 463 | |
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| 464 | default: |
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| 465 | FFissionDecoder::GetProperty(inPropertyID, ioPropertyDataSize, outPropertyData); |
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| 466 | } |
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| 467 | } |
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| 468 | |
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| 469 | |
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| 470 | extern "C" |
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| 471 | ComponentResult FFissionDecoderEntry(ComponentParameters* inParameters, FFissionDecoder* inThis) |
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| 472 | { |
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| 473 | return ACCodecDispatch(inParameters, inThis); |
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| 474 | } |
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| 475 | |
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| 476 | extern "C" |
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| 477 | ComponentResult FFissionVBRDecoderEntry(ComponentParameters* inParameters, FFissionVBRDecoder* inThis) |
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| 478 | { |
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| 479 | return ACCodecDispatch(inParameters, inThis); |
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| 480 | } |
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