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-rw-r--r--dxr3audiodecoder.c302
1 files changed, 0 insertions, 302 deletions
diff --git a/dxr3audiodecoder.c b/dxr3audiodecoder.c
deleted file mode 100644
index 94bdb4e..0000000
--- a/dxr3audiodecoder.c
+++ /dev/null
@@ -1,302 +0,0 @@
-/*
- * dxr3audiodecoder.c
- *
- * Copyright (C) 2002-2004 Kai Möller
- * Copyright (C) 2004 Christian Gmeiner
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License
- * as published by the Free Software Foundation; either version 2.1
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- */
-
-
-/*
-ToDo:
- - cDxr3AudioDecoder::Init: Why are we always reinit the codec?
-*/
-
-
-#include <stdio.h>
-#include "dxr3audiodecoder.h"
-#include "dxr3pesframe.h"
-
-// ==================================
-const int cLPCM_HEADER_LENGTH = 7;
-
-// ==================================
-//! constructor
-cDxr3AudioDecoder::cDxr3AudioDecoder() : m_RBuf(50000), m_AC3dtsDecoder(&m_RBuf)
-{
- // default start values
- m_DecoderOpened = false;
- m_AudioSynched = false;
- m_Volume = 255;
- m_Codec.id = CODEC_ID_MP2;
-
- Init();
-
- // setuo our header
- m_LastHeader[0] = 0xFF;
- m_LastHeader[1] = m_LastHeader[2] = m_LastHeader[3] = 0;
-};
-
-// ==================================
-//! deconst.
-cDxr3AudioDecoder::~cDxr3AudioDecoder()
-{
- // close codec, if it is open
- cDxr3Ffmepg::Instance().CloseCodec(m_Codec);
-};
-
-// ==================================
-//! (re)init ffmpeg codec
-void cDxr3AudioDecoder::Init()
-{
- // (re)init codec
- cDxr3Ffmepg::Instance().CloseCodec(m_Codec);
- if (cDxr3Ffmepg::Instance().FindCodec(m_Codec))
- {
- cDxr3Ffmepg::Instance().OpenCodec(m_Codec);
- m_Rate = m_Channels = -1;
- m_FrameSize = m_Codec.codec_context.frame_size;
- m_DecoderOpened = true;
- m_FoundHeader = false;
- m_DecodeAudio = true;
- }
- else
- {
- m_DecoderOpened = false;
- }
-}
-
-// ==================================
-//! decode given buffer
-void cDxr3AudioDecoder::Decode(const uint8_t* buf, int length, uint32_t pts, cDxr3SyncBuffer &aBuf)
-{
- if (!m_DecoderOpened)
- {
- // No decoder is open, so it
- // is better to stop here.
- return;
- }
-
- int len;
- int out_size;
-
- enum audioException
- {
- WRONG_LENGTH,
- UNEXPECTED_PARAMETER_CHANGE
- };
-
- int i = 0;
- for (i = 0; i < length-4 && !m_FoundHeader; i++)
- {
- unsigned int tempHead = *((unsigned int*)(buf+i));
- if (HeadCheck(tempHead))
- {
- if ((buf[i+2] & 0xFC) != (m_LastHeader[2] & 0xFC))
- {
- cLog::Instance() << "cDxr3AudioDecoder::Decode Found different audio header -> init\n";
- cLog::Instance() << "cDxr3AudioDecoder::Decode Old header 0x" << std::hex << *((uint32_t*) m_LastHeader) << " new header 0x" << *((uint32_t*) (buf+i)) << std::dec << "\n";
-
- Init();
- m_LastHeader[0] = buf[i];
- m_LastHeader[1] = buf[i+1];
- m_LastHeader[2] = buf[i+2];
- m_LastHeader[3] = buf[i+3];
- }
- m_FoundHeader = true;
- }
- }
-
- if (m_AudioSynched)
- {
- // no header found
- m_DecodeAudio = true;
- }
- else
- {
- if (m_FoundHeader && pts)
- {
- m_DecodeAudio = true;
- m_AudioSynched = true;
- }
- }
-
- try
- {
- while (length > 0 && m_DecodeAudio)
- {
- len = avcodec_decode_audio(&m_Codec.codec_context, (short *)(&m_PcmBuf), &out_size,
- const_cast<uint8_t *>(buf), length);
- if (len < 0 || out_size < 0) throw WRONG_LENGTH;
-
- if (m_Codec.codec_context.sample_rate != m_Rate)
- {
- cLog::Instance() << "cDxr3AudioDecoder::Decode Sample rate = " << m_Codec.codec_context.sample_rate << "\n";
- if (m_Rate != -1) throw UNEXPECTED_PARAMETER_CHANGE;
- m_Rate = m_Codec.codec_context.sample_rate;
- }
- if (m_Codec.codec_context.channels != m_Channels+1 )
- {
- if (m_Channels != -1) throw UNEXPECTED_PARAMETER_CHANGE;
- m_Channels = (m_Codec.codec_context.channels == 2) ? 1 : 0;
- cLog::Instance() << "cDxr3AudioDecoder::Decode channels = " << m_Codec.codec_context.channels << "\n";
- }
- if (out_size)
- {
- cFixedLengthFrame* pTempFrame = aBuf.Push(m_PcmBuf, out_size, pts);
- pTempFrame->SetChannelCount(m_Channels);
- pTempFrame->SetDataRate(m_Rate);
- }
- length -= len;
- buf += len;
- }
- }
- catch (audioException ex)
- {
- switch (ex)
- {
- case WRONG_LENGTH:
- cLog::Instance() << "cDxr3AudioDecoder::Decode wrong length\n";
- break;
-
- case UNEXPECTED_PARAMETER_CHANGE:
- cLog::Instance() << "cDxr3AudioDecoder::Decode unexpected parameter change\n";
- break;
-
- default:
- cLog::Instance() << "cDxr3AudioDecoder::Decode unexpeced exception\n";
- break;
- }
- dsyslog("cDxr3AudioDecoder::Decode skipping %d broken data bytes", length);
-
- Init();
- }
-}
-
-// ==================================
-//! decode lpcm
-void cDxr3AudioDecoder::DecodeLpcm(const uint8_t* buf, int length, uint32_t pts, cDxr3SyncBuffer &aBuf)
-{
- if (length > (cLPCM_HEADER_LENGTH + 2))
- {
- uint8_t* pFrame = new uint8_t[length - cLPCM_HEADER_LENGTH];
- assert(!((length - cLPCM_HEADER_LENGTH) % 2)); // only even number of bytes are allowed
-
- for (int i = cLPCM_HEADER_LENGTH; i < length; i += 2)
- {
- pFrame[i - cLPCM_HEADER_LENGTH] = buf[i + 1];
- pFrame[i - cLPCM_HEADER_LENGTH + 1] = buf[i];
- }
-
- int codedSpeed = (buf[5] >> 4) & 0x03;
- int speed = 0;
-
- switch (codedSpeed)
- {
- case 1:
- speed = 96000;
- break;
-
- case 2:
- speed = 44100;
- break;
-
- case 3:
- speed = 32000;
- break;
-
- default:
- speed = 48000;
- break;
- }
-
- cFixedLengthFrame* pTempFrame = aBuf.Push(pFrame, length - cLPCM_HEADER_LENGTH, pts);
- pTempFrame->SetChannelCount(1);
- pTempFrame->SetDataRate(speed);
-
- delete[] pFrame;
- }
-}
-
-// ==================================
-//! decode ac3
-void cDxr3AudioDecoder::DecodeAc3Dts(const uint8_t* pPes, const uint8_t* buf, int length, uint32_t pts, cDxr3SyncBuffer &aBuf)
-{
- int headerLength = (int) (buf - pPes);
-
- uint8_t* pBuf = (uint8_t*) pPes;
- m_AC3dtsDecoder.Check(pBuf + headerLength, length, pBuf);
- m_AC3dtsDecoder.Encapsulate(pBuf + headerLength, length);
-
- cFrame* pFrame = 0;
- while ((pFrame = m_RBuf.Get()))
- {
- if (pFrame && pFrame->Count())
- {
- cDxr3PesFrame tempPes;
- tempPes.ExtractNextFrame(pFrame->Data(), pFrame->Count());
- int pesHeaderLength = (int) (tempPes.GetEsStart() - tempPes.GetPesStart());
- uint8_t* pData = pFrame->Data() + pesHeaderLength + cLPCM_HEADER_LENGTH;
-
- for (int i = 0; i < pFrame->Count() - pesHeaderLength - cLPCM_HEADER_LENGTH; i += 2)
- {
- std::swap(pData[i], pData[i + 1]);
- }
-
- aBuf.Push(pFrame->Data() + pesHeaderLength + cLPCM_HEADER_LENGTH, pFrame->Count() - pesHeaderLength - 7, tempPes.GetPts());
- if (pFrame) m_RBuf.Drop(pFrame);
- }
- }
-}
-
-// ==================================
-//! checking routine
-bool cDxr3AudioDecoder::HeadCheck(unsigned long head)
-{
- bool retval = false;
-
- uint8_t* phead = (uint8_t*) (&head);
- if (phead[0] != 0xFF)
- {
- retval = false;
- }
- else if (phead[1] != 0xFC && phead[1] != 0xFE)
- {
- retval = false;
- }
- else if ((phead[2] & 0xF0) == 0xF0)
- {
- retval = false;
- }
- else if ((phead[2] & 0xC) == 0xC)
- {
- retval = false;
- }
- else
- {
- retval = true;
- }
-
- return retval;
-}
-
-// Local variables:
-// mode: c++
-// c-file-style: "stroustrup"
-// c-file-offsets: ((inline-open . 0))
-// indent-tabs-mode: t
-// End:
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