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This commit is contained in:
Christian R. Helmrich
2020-08-18 12:00:00 +02:00
parent b033287115
commit 399a5b78d8
3 changed files with 5 additions and 32 deletions
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31
src/app/basicMP4Writer.cpp
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@@ -13,14 +13,6 @@
#include "basicMP4Writer.h"
#include "version.h"
#if 0 // DEBUG
static const uint8_t muLawHeader[44] = {
0x52, 0x49, 0x46, 0x46, 0xF0, 0xFF, 0xFF, 0xFF, 0x57, 0x41, 0x56, 0x45, 0x66, 0x6D, 0x74, 0x20,
0x10, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x08, 0x00, 0x64, 0x61, 0x74, 0x61, 0xF0, 0xFF, 0xFF, 0xFF
};
#endif
static const uint8_t staticHeaderTemplate[STAT_HEADER_SIZE] = {
0x00, 0x00, 0x00, 0x18, 0x66, 0x74, 0x79, 0x70, 0x6D, 0x70, 0x34, 0x32, 0x00, 0x00, 0x00, 0x00, // ftyp
0x6D, 0x70, 0x34, 0x32, 0x69, 0x73, 0x6F, 0x6D, 0x00, 0x00, MOOV_BSIZE, 0x6D, 0x6F, 0x6F, 0x76, // moov
@@ -107,7 +99,7 @@ int BasicMP4Writer::finishFile (const unsigned avgBitrate, const unsigned maxBit
#ifndef NO_FIX_FOR_ISSUE_1
# ifndef NO_FIX_FOR_ISSUE_13
const uint32_t chunkCount = (m_frameCount + m_rndAccPeriod - 1) / m_rndAccPeriod;
const uint32_t stssAtomSize = STSX_BSIZE + chunkCount * 4;
const uint32_t stssAtomSize = STSX_BSIZE + chunkCount * 4; // NOTE: must equal stcoAtomSize
# else
const uint32_t stssAtomSize = STSX_BSIZE + 4;
# endif
@@ -369,22 +361,6 @@ int BasicMP4Writer::finishFile (const unsigned avgBitrate, const unsigned maxBit
int BasicMP4Writer::initHeader (const uint32_t audioLength) // reserve bytes for header in file
{
#if 0 // DEBUG
const uint8_t numChannels = m_staticHeader[517];
// write basic <20>-Law WAVE header for testing
memcpy (m_staticHeader, muLawHeader, 44 * sizeof (uint8_t));
m_staticHeader[22] = numChannels;
m_staticHeader[24] = uint8_t (m_sampleRate & 0xFF);
m_staticHeader[25] = uint8_t (m_sampleRate >> 8u);
m_staticHeader[26] = uint8_t (m_sampleRate >> 16u);
m_staticHeader[28] = uint8_t ((m_sampleRate * numChannels) & 0xFF);
m_staticHeader[29] = uint8_t ((m_sampleRate * numChannels) >> 8u);
m_staticHeader[30] = uint8_t ((m_sampleRate * numChannels) >> 16u);
m_staticHeader[32] = numChannels; // byte count per frame
return _WRITE (m_fileHandle, m_staticHeader, 44);
#else
/* NOTE: the following condition is, as far as I can tell, correct, but some decoders with DRC processing
may decode too few samples with it. Hence, I disabled it. See also corresponding NOTE in exhaleApp.cpp */
const bool flushFrameUsed = true; // ((audioLength + m_pregapLength) % m_frameLength) > 0;
@@ -411,7 +387,6 @@ int BasicMP4Writer::initHeader (const uint32_t audioLength) // reserve bytes for
m_mediaOffset = bytesWritten; // first frame will be written at this offset
return bytesWritten;
#endif
}
unsigned BasicMP4Writer::open (const int mp4FileHandle, const unsigned sampleRate, const unsigned numChannels,
@@ -437,9 +412,7 @@ unsigned BasicMP4Writer::open (const int mp4FileHandle, const unsigned sampleRat
#else
reset (frameLength, pregapLength, raPeriod);
#endif
#if 0 // DEBUG
m_sampleRate = sampleRate;
#endif
// create fixed-length 576-byte part of MPEG-4 file header
memcpy (m_staticHeader, staticHeaderTemplate, STAT_HEADER_SIZE * sizeof (uint8_t));

4
src/lib/bitAllocation.cpp
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@@ -521,9 +521,9 @@ unsigned BitAllocator::imprSfbStepSizes (const SfbGroupData* const groupData[USA
if ((m_rateIndex == 0) && lowRateTuning) // clip near-zero SNRs to a minimum SNR
{
const uint32_t rms = uint32_t ((grpRms[b] * (8192u - (uint64_t) sfm[ch] * sfm[ch]) + (1u << 12)) >> 13);
const uint32_t lim = uint32_t ((grpRms[b] * (8192u - (uint64_t) sfm[ch] * sfm[ch]) + (1u << 12)) >> 13);
if ((grpStepSizes[b] > grpRms[b]) && ((grpStepSizes[b] >> 1) <= rms)) grpStepSizes[b] = grpRms[b];
if ((grpStepSizes[b] > grpRms[b]) && ((grpStepSizes[b] >> 1) <= lim)) grpStepSizes[b] = grpRms[b];
}
}
}

2
src/lib/stereoProcessing.cpp
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@@ -584,7 +584,7 @@ unsigned StereoProcessor::applyPredJointStereo (int32_t* const mdctSpectrum1, in
*sfbMdctR = resiRe;
}
}
else // complex data, both MDCT and MDST is available
else // complex data, both MDCT and MDST are available
{
int32_t* sfbMdstD = (alterPredDir ? &mdstSpectrum2[sfbStart] : &mdstSpectrum1[sfbStart]);
int32_t* sfbMdstR = (alterPredDir ? &mdstSpectrum1[sfbStart] : &mdstSpectrum2[sfbStart]);