mirror of
https://github.com/hrydgard/ppsspp.git
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128 lines
3.7 KiB
C++
128 lines
3.7 KiB
C++
// Copyright (c) 2013- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#include "Core/HW/MediaEngine.h"
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#include "Core/HLE/sceAudio.h"
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// Decodes packet by packet - does NOT demux.
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// audioType
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enum PSPAudioType {
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PSP_CODEC_AT3PLUS = 0x00001000,
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PSP_CODEC_AT3 = 0x00001001,
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PSP_CODEC_MP3 = 0x00001002,
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PSP_CODEC_AAC = 0x00001003,
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};
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class AudioDecoder {
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public:
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virtual ~AudioDecoder() {}
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virtual PSPAudioType GetAudioType() const = 0;
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// inbytesConsumed can include skipping metadata.
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// outSamples is in stereo samples. So you have to multiply by 4 for 16-bit stereo audio to get bytes.
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// For Atrac3, if *outSamples != 0, it'll cap the number of samples to output. In this case, its value can only shrink.
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// TODO: Implement that in the other decoders too, if needed.
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virtual bool Decode(const uint8_t *inbuf, int inbytes, int *inbytesConsumed, int outputChannels, int16_t *outbuf, int *outSamples) = 0;
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virtual bool IsOK() const = 0;
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virtual void SetChannels(int channels) = 0;
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virtual void FlushBuffers() {}
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// Just metadata.
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void SetCtxPtr(uint32_t ptr) { ctxPtr = ptr; }
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uint32_t GetCtxPtr() const { return ctxPtr; }
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private:
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uint32_t ctxPtr = 0xFFFFFFFF;
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};
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void AudioClose(AudioDecoder **ctx);
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const char *GetCodecName(int codec); // audioType
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bool IsValidCodec(PSPAudioType codec);
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AudioDecoder *CreateAudioDecoder(PSPAudioType audioType, int sampleRateHz = 44100, int channels = 2, size_t blockAlign = 0, const uint8_t *extraData = nullptr, size_t extraDataSize = 0);
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class AuCtx {
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public:
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AuCtx();
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~AuCtx();
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u32 AuDecode(u32 pcmAddr);
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u32 AuNotifyAddStreamData(int size);
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int AuCheckStreamDataNeeded();
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int AuStreamBytesNeeded();
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int AuStreamWorkareaSize();
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u32 AuResetPlayPosition();
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u32 AuResetPlayPositionByFrame(int position);
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u32 AuGetInfoToAddStreamData(u32 bufPtr, u32 sizePtr, u32 srcPosPtr);
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void SetReadPos(int pos) { readPos = pos; }
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int ReadPos() { return readPos; }
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void DoState(PointerWrap &p);
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void EatSourceBuff(int amount) {
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if (amount > (int)sourcebuff.size()) {
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amount = (int)sourcebuff.size();
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}
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if (amount > 0)
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sourcebuff.erase(sourcebuff.begin(), sourcebuff.begin() + amount);
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AuBufAvailable -= amount;
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}
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// Au source information. Written to from for example sceAacInit so public for now.
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u64 startPos = 0;
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u64 endPos = 0;
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u32 AuBuf = 0;
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u32 AuBufSize = 0;
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u32 PCMBuf = 0;
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u32 PCMBufSize = 0;
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int freq = -1; // used by AAC only?
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int BitRate = 0;
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int SamplingRate = -1;
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int Channels = 0;
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int Version = -1;
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// State variables. These should be relatively easy to move into private.
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u32 SumDecodedSamples = 0;
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int LoopNum = -1;
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u32 MaxOutputSample = 0;
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int FrameNum = 0;
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// Au decoder
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AudioDecoder *decoder = nullptr;
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private:
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size_t FindNextMp3Sync();
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std::vector<u8> sourcebuff; // source buffer
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// buffers informations
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int AuBufAvailable = 0; // the available buffer of AuBuf to be able to recharge data
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int readPos = 0; // read position in audio source file
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int askedReadSize = 0; // the size of data requied to be read from file by the game
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int nextOutputHalf = 0;
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};
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