xbmc/cores/paplayer/AudioDecoder.h

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #pragma once
  10
  11 #include "threads/CriticalSection.h"
  12 #include "utils/RingBuffer.h"
  13
  14 struct AEAudioFormat;
  15 class CFileItem;
  16 class ICodec;
  17
  18 #define PACKET_SIZE 3840    // audio packet size - we keep 1 in reserve for gapless playback
  19                             // using a multiple of 1, 2, 3, 4, 5, 6 to guarantee track alignment
  20                             // note that 7 or higher channels won't work too well.
  21
  22 #define INPUT_SIZE PACKET_SIZE * 3      // input data size we read from the codecs at a time
  23                                         // * 3 to allow 24 bit audio
  24
  25 #define OUTPUT_SAMPLES PACKET_SIZE      // max number of output samples
  26 #define INPUT_SAMPLES  PACKET_SIZE      // number of input samples (distributed over channels)
  27
  28 #define STATUS_NO_FILE  0
  29 #define STATUS_QUEUING  1
  30 #define STATUS_QUEUED   2
  31 #define STATUS_PLAYING  3
  32 #define STATUS_ENDING   4
  33 #define STATUS_ENDED    5
  34
  35 // return codes from decoders
  36 #define RET_ERROR -1
  37 #define RET_SUCCESS 0
  38 #define RET_SLEEP 1
  39
  40 class CAudioDecoder
  41 {
  42 public:
  43   CAudioDecoder();
  44   ~CAudioDecoder();
  45
  46   bool Create(const CFileItem &file, int64_t seekOffset);
  47   void Destroy();
  48
  49   int ReadSamples(int numsamples);
  50
  51   bool CanSeek();
  52   int64_t Seek(int64_t time);
  53   int64_t TotalTime();
  54   void SetTotalTime(int64_t time);
  55   void Start() { m_canPlay = true;}; // cause a pre-buffered stream to start.
  56   int GetStatus() { return m_status; }
  57   void SetStatus(int status) { m_status = status; }
  58
  59   AEAudioFormat GetFormat();
  60   unsigned int GetChannels();
  61   // Data management
  62   unsigned int GetDataSize(bool checkPktSize);
  63   void *GetData(unsigned int samples);
  64   uint8_t* GetRawData(int &size);
  65   ICodec *GetCodec() const { return m_codec; }
  66   float GetReplayGain(float &peakVal);
  67
  68 private:
  69   // pcm buffer
  70   CRingBuffer m_pcmBuffer;
  71
  72   // output buffer (for transferring data from the Pcm Buffer to the rest of the audio chain)
  73   float m_outputBuffer[OUTPUT_SAMPLES];
  74
  75   // input buffer (for transferring data from the Codecs to our Pcm Ringbuffer
  76   uint8_t m_pcmInputBuffer[INPUT_SIZE];
  77   float m_inputBuffer[INPUT_SAMPLES];
  78
  79   uint8_t *m_rawBuffer;
  80   int m_rawBufferSize;
  81
  82   // status
  83   bool m_eof;
  84   int m_status;
  85   bool m_canPlay;
  86
  87   // the codec we're using
  88   ICodec* m_codec;
  89
  90   CCriticalSection m_critSection;
  91 };