[x265] [PATCH] Add emergency denoising when frame qp > QP_MAX_SPEC
Sagar Kotecha
sagar at multicorewareinc.com
Thu Aug 20 10:13:11 CEST 2015
I think we can do that. It will be much cleaner.
On Thu, Aug 20, 2015 at 12:11 PM, Deepthi Nandakumar <
deepthi at multicorewareinc.com> wrote:
>
>
> On Wed, Aug 19, 2015 at 3:31 PM, <sagar at multicorewareinc.com> wrote:
>
>> # HG changeset patch
>> # User Sagar Kotecha <sagar at multicorewareinc.com>
>> # Date 1439978360 -19800
>> # Node ID 8878f03570b2a8d0207f5e96bae3900de5653ec0
>> # Parent 2980141a744a569ad6f60dbebdece76a4eababfd
>> Add emergency denoising when frame qp > QP_MAX_SPEC
>>
>> This feature is ported from x264, and is turned on for VBV encodes
>>
>> diff -r 2980141a744a -r 8878f03570b2 source/common/common.h
>> --- a/source/common/common.h Tue Aug 18 12:45:52 2015 +0530
>> +++ b/source/common/common.h Wed Aug 19 15:29:20 2015 +0530
>> @@ -317,6 +317,9 @@
>> #define CHROMA_V_SHIFT(x) (x == X265_CSP_I420)
>> #define X265_MAX_PRED_MODE_PER_CTU 85 * 2 * 8
>>
>> +#define MAX_NUM_TR_COEFFS MAX_TR_SIZE * MAX_TR_SIZE // Maximum
>> number of transform coefficients, for a 32x32 transform
>> +#define MAX_NUM_TR_CATEGORIES 16 // 32, 16,
>> 8, 4 transform categories each for luma and chroma
>> +
>> namespace X265_NS {
>>
>> enum { SAO_NUM_OFFSET = 4 };
>> diff -r 2980141a744a -r 8878f03570b2 source/common/quant.cpp
>> --- a/source/common/quant.cpp Tue Aug 18 12:45:52 2015 +0530
>> +++ b/source/common/quant.cpp Wed Aug 19 15:29:20 2015 +0530
>> @@ -444,12 +444,12 @@
>> primitives.cu[sizeIdx].dct(m_fencShortBuf, m_fencDctCoeff,
>> trSize);
>> }
>>
>> - if (m_nr)
>> + if (m_nr && m_nr->offset)
>> {
>> /* denoise is not applied to intra residual, so DST can be
>> ignored */
>> int cat = sizeIdx + 4 * !isLuma + 8 * !isIntra;
>> int numCoeff = 1 << (log2TrSize * 2);
>> - primitives.denoiseDct(m_resiDctCoeff,
>> m_nr->residualSum[cat], m_nr->offsetDenoise[cat], numCoeff);
>> + primitives.denoiseDct(m_resiDctCoeff,
>> m_nr->residualSum[cat], m_nr->offset[cat], numCoeff);
>> m_nr->count[cat]++;
>> }
>> }
>> diff -r 2980141a744a -r 8878f03570b2 source/common/quant.h
>> --- a/source/common/quant.h Tue Aug 18 12:45:52 2015 +0530
>> +++ b/source/common/quant.h Wed Aug 19 15:29:20 2015 +0530
>> @@ -59,18 +59,19 @@
>> }
>> };
>>
>> -#define MAX_NUM_TR_COEFFS MAX_TR_SIZE * MAX_TR_SIZE /* Maximum
>> number of transform coefficients, for a 32x32 transform */
>> -#define MAX_NUM_TR_CATEGORIES 16 /* 32, 16, 8,
>> 4 transform categories each for luma and chroma */
>> -
>> // NOTE: MUST be 16-byte aligned for asm code
>> struct NoiseReduction
>> {
>> /* 0 = luma 4x4, 1 = luma 8x8, 2 = luma 16x16, 3 = luma 32x32
>> * 4 = chroma 4x4, 5 = chroma 8x8, 6 = chroma 16x16, 7 = chroma 32x32
>> * Intra 0..7 - Inter 8..15 */
>> - uint16_t offsetDenoise[MAX_NUM_TR_CATEGORIES][MAX_NUM_TR_COEFFS];
>> - uint32_t residualSum[MAX_NUM_TR_CATEGORIES][MAX_NUM_TR_COEFFS];
>> - uint32_t count[MAX_NUM_TR_CATEGORIES];
>> + uint16_t nrOffsetDenoise[MAX_NUM_TR_CATEGORIES][MAX_NUM_TR_COEFFS];
>> + uint32_t nrResidualSum[MAX_NUM_TR_CATEGORIES][MAX_NUM_TR_COEFFS];
>> + uint32_t nrCount[MAX_NUM_TR_CATEGORIES];
>> +
>> + ALIGN_VAR_16(uint16_t, (*offset)[MAX_NUM_TR_COEFFS]);
>> + uint32_t(*residualSum)[MAX_NUM_TR_COEFFS];
>> + uint32_t *count;
>> };
>>
>> class Quant
>> diff -r 2980141a744a -r 8878f03570b2 source/encoder/encoder.cpp
>> --- a/source/encoder/encoder.cpp Tue Aug 18 12:45:52 2015 +0530
>> +++ b/source/encoder/encoder.cpp Wed Aug 19 15:29:20 2015 +0530
>> @@ -68,6 +68,7 @@
>> m_latestParam = NULL;
>> m_threadPool = NULL;
>> m_analysisFile = NULL;
>> + m_offsetEmergency = NULL;
>> for (int i = 0; i < X265_MAX_FRAME_THREADS; i++)
>> m_frameEncoder[i] = NULL;
>>
>> @@ -187,6 +188,7 @@
>> {
>> x265_log(m_param, X265_LOG_ERROR, "Unable to allocate scaling
>> list arrays\n");
>> m_aborted = true;
>> + return;
>> }
>> else if (!m_param->scalingLists || !strcmp(m_param->scalingLists,
>> "off"))
>> m_scalingList.m_bEnabled = false;
>> @@ -194,7 +196,6 @@
>> m_scalingList.setDefaultScalingList();
>> else if (m_scalingList.parseScalingList(m_param->scalingLists))
>> m_aborted = true;
>> - m_scalingList.setupQuantMatrices();
>>
>> m_lookahead = new Lookahead(m_param, m_threadPool);
>> if (m_numPools)
>> @@ -221,6 +222,83 @@
>> }
>> }
>>
>> + if (m_param->rc.vbvBufferSize)
>> + {
>> + m_offsetEmergency =
>> (uint16_t(*)[MAX_NUM_TR_CATEGORIES][MAX_NUM_TR_COEFFS])X265_MALLOC(uint16_t,
>> MAX_NUM_TR_CATEGORIES * MAX_NUM_TR_COEFFS * (QP_MAX_MAX - QP_MAX_SPEC));
>> + if (!m_offsetEmergency)
>> + {
>> + x265_log(m_param, X265_LOG_ERROR, "Unable to allocate
>> memory\n");
>> + m_aborted = true;
>> + return;
>> + }
>> +
>> + bool scalingEnabled = m_scalingList.m_bEnabled;
>> + if (!scalingEnabled)
>> + {
>> + m_scalingList.setDefaultScalingList();
>> + m_scalingList.setupQuantMatrices();
>> + }
>> + else
>> + m_scalingList.setupQuantMatrices();
>> +
>> + for (int q = 0; q < QP_MAX_MAX - QP_MAX_SPEC; q++)
>> + {
>> + for (int cat = 0; cat < MAX_NUM_TR_CATEGORIES; cat++)
>> + {
>> + uint16_t *nrOffset = m_offsetEmergency[q][cat];
>> +
>> + int trSize = cat & 3;
>> +
>> + int coefCount = 1 << ((trSize + 2) * 2);
>> +
>> + /* Denoise chroma first then luma, then DC. */
>> + int dcThreshold = (QP_MAX_MAX - QP_MAX_SPEC) * 2 / 3;
>> + int lumaThreshold = (QP_MAX_MAX - QP_MAX_SPEC) * 2 / 3;
>> + int chromaThreshold = 0;
>> +
>> + int thresh = (cat < 4 || (cat >= 8 && cat < 12)) ?
>> lumaThreshold : chromaThreshold;
>> +
>> + double quantF = (double)(1ULL << (q / 6 + 16 + 8));
>> +
>> + for (int i = 0; i < coefCount; i++)
>> + {
>> + uint16_t max = (1 << (7 + X265_DEPTH)) - 1;
>> + /* True "emergency mode": remove all DCT
>> coefficients */
>> + if (q == QP_MAX_MAX - QP_MAX_SPEC - 1)
>> + {
>> + nrOffset[i] = max;
>> + continue;
>> + }
>> +
>> + int iThresh = i == 0 ? dcThreshold : thresh;
>> + if (q < iThresh)
>> + {
>> + nrOffset[i] = 0;
>> + continue;
>> + }
>> +
>> + int numList = (cat >= 8) * 3 + ((int)!iThresh);
>> +
>> + double pos = (double)(q - iThresh + 1) / (QP_MAX_MAX
>> - QP_MAX_SPEC - iThresh);
>> + double start = quantF /
>> (m_scalingList.m_quantCoef[trSize][numList][QP_MAX_SPEC % 6][i]);
>> +
>> + // Formula chosen as an exponential scale to vaguely
>> mimic the effects of a higher quantizer.
>> + double bias = (pow(2, pos * (QP_MAX_MAX -
>> QP_MAX_SPEC)) * 0.003 - 0.003) * start;
>> + nrOffset[i] = (uint16_t)X265_MIN(bias + 0.5, max);
>> + }
>> + }
>> + }
>> +
>> + if (!scalingEnabled)
>> + {
>> + m_scalingList.m_bEnabled = false;
>> + m_scalingList.m_bDataPresent = false;
>> + m_scalingList.setupQuantMatrices();
>> + }
>> + }
>> + else
>> + m_scalingList.setupQuantMatrices();
>> +
>> for (int i = 0; i < m_param->frameNumThreads; i++)
>> {
>> m_frameEncoder[i]->start();
>> @@ -314,6 +392,8 @@
>> delete m_rateControl;
>> }
>>
>> + X265_FREE(m_offsetEmergency);
>> +
>> if (m_analysisFile)
>> fclose(m_analysisFile);
>>
>> diff -r 2980141a744a -r 8878f03570b2 source/encoder/encoder.h
>> --- a/source/encoder/encoder.h Tue Aug 18 12:45:52 2015 +0530
>> +++ b/source/encoder/encoder.h Wed Aug 19 15:29:20 2015 +0530
>> @@ -130,6 +130,10 @@
>> bool m_aborted; // fatal error detected
>> bool m_reconfigured; // reconfigure of encoder
>> detected
>>
>> + uint16_t
>> (*m_offsetEmergency)[MAX_NUM_TR_CATEGORIES][MAX_NUM_TR_COEFFS];
>> + ALIGN_VAR_32(uint32_t,
>> m_residualSumEmergency[MAX_NUM_TR_CATEGORIES][MAX_NUM_TR_COEFFS]);
>>
>
> Can we remove the alignment directive? Will introduce padding within a key
> structure.
>
> + uint32_t m_countEmergency[MAX_NUM_TR_CATEGORIES];
>> +
>> Encoder();
>> ~Encoder() {}
>>
>> diff -r 2980141a744a -r 8878f03570b2 source/encoder/frameencoder.cpp
>> --- a/source/encoder/frameencoder.cpp Tue Aug 18 12:45:52 2015 +0530
>> +++ b/source/encoder/frameencoder.cpp Wed Aug 19 15:29:20 2015 +0530
>> @@ -135,7 +135,7 @@
>> ok &= m_rce.picTimingSEI && m_rce.hrdTiming;
>> }
>>
>> - if (m_param->noiseReductionIntra || m_param->noiseReductionInter)
>> + if (m_param->noiseReductionIntra || m_param->noiseReductionInter ||
>> m_param->rc.vbvBufferSize)
>> m_nr = X265_MALLOC(NoiseReduction, 1);
>> if (m_nr)
>> memset(m_nr, 0, sizeof(NoiseReduction));
>> @@ -362,11 +362,47 @@
>> }
>> }
>>
>> + int numTLD;
>> + if (m_pool)
>> + numTLD = m_param->bEnableWavefront ? m_pool->m_numWorkers :
>> m_pool->m_numWorkers + m_pool->m_numProviders;
>> + else
>> + numTLD = 1;
>> +
>> /* Get the QP for this frame from rate control. This call may block
>> until
>> * frames ahead of it in encode order have called rateControlEnd() */
>> int qp = m_top->m_rateControl->rateControlStart(m_frame, &m_rce,
>> m_top);
>> m_rce.newQp = qp;
>>
>> + if (m_nr)
>> + {
>> + if (qp > QP_MAX_SPEC && m_frame->m_param->rc.vbvBufferSize)
>> + {
>> + for (int i = 0; i < numTLD; i++)
>> + {
>> + m_tld[i].analysis.m_quant.m_frameNr[m_jpId].offset =
>> m_top->m_offsetEmergency[qp - QP_MAX_SPEC - 1];
>> + m_tld[i].analysis.m_quant.m_frameNr[m_jpId].residualSum
>> = m_top->m_residualSumEmergency;
>> + m_tld[i].analysis.m_quant.m_frameNr[m_jpId].count =
>> m_top->m_countEmergency;
>> + }
>> + }
>> + else
>> + {
>> + if (m_param->noiseReductionIntra ||
>> m_param->noiseReductionInter)
>> + {
>> + for (int i = 0; i < numTLD; i++)
>> + {
>> + m_tld[i].analysis.m_quant.m_frameNr[m_jpId].offset =
>> m_tld[i].analysis.m_quant.m_frameNr[m_jpId].nrOffsetDenoise;
>> +
>> m_tld[i].analysis.m_quant.m_frameNr[m_jpId].residualSum =
>> m_tld[i].analysis.m_quant.m_frameNr[m_jpId].nrResidualSum;
>> + m_tld[i].analysis.m_quant.m_frameNr[m_jpId].count =
>> m_tld[i].analysis.m_quant.m_frameNr[m_jpId].nrCount;
>> + }
>> + }
>> + else
>> + {
>> + for (int i = 0; i < numTLD; i++)
>> + m_tld[i].analysis.m_quant.m_frameNr[m_jpId].offset =
>> NULL;
>> + }
>> + }
>> + }
>> +
>> /* Clip slice QP to 0-51 spec range before encoding */
>> slice->m_sliceQp = x265_clip3(-QP_BD_OFFSET, QP_MAX_SPEC, qp);
>>
>> @@ -699,37 +735,36 @@
>> }
>> }
>>
>> - int numTLD;
>> - if (m_pool)
>> - numTLD = m_param->bEnableWavefront ? m_pool->m_numWorkers :
>> m_pool->m_numWorkers + m_pool->m_numProviders;
>> - else
>> - numTLD = 1;
>> -
>> if (m_nr)
>> {
>> - /* Accumulate NR statistics from all worker threads */
>> - for (int i = 0; i < numTLD; i++)
>> - {
>> - NoiseReduction* nr =
>> &m_tld[i].analysis.m_quant.m_frameNr[m_jpId];
>> - for (int cat = 0; cat < MAX_NUM_TR_CATEGORIES; cat++)
>> - {
>> - for (int coeff = 0; coeff < MAX_NUM_TR_COEFFS; coeff++)
>> - m_nr->residualSum[cat][coeff] +=
>> nr->residualSum[cat][coeff];
>> -
>> - m_nr->count[cat] += nr->count[cat];
>> - }
>> - }
>> -
>> - noiseReductionUpdate();
>> -
>> - /* Copy updated NR coefficients back to all worker threads */
>> - for (int i = 0; i < numTLD; i++)
>> - {
>> - NoiseReduction* nr =
>> &m_tld[i].analysis.m_quant.m_frameNr[m_jpId];
>> - memcpy(nr->offsetDenoise, m_nr->offsetDenoise,
>> sizeof(uint16_t) * MAX_NUM_TR_CATEGORIES * MAX_NUM_TR_COEFFS);
>> - memset(nr->count, 0, sizeof(uint32_t) *
>> MAX_NUM_TR_CATEGORIES);
>> - memset(nr->residualSum, 0, sizeof(uint32_t) *
>> MAX_NUM_TR_CATEGORIES * MAX_NUM_TR_COEFFS);
>> - }
>> + bool nrEnabled = (m_rce.newQp < QP_MAX_SPEC ||
>> !m_param->rc.vbvBufferSize) && (m_param->noiseReductionIntra ||
>> m_param->noiseReductionInter);
>> +
>> + if (nrEnabled)
>> + {
>> + /* Accumulate NR statistics from all worker threads */
>> + for (int i = 0; i < numTLD; i++)
>> + {
>> + NoiseReduction* nr =
>> &m_tld[i].analysis.m_quant.m_frameNr[m_jpId];
>> + for (int cat = 0; cat < MAX_NUM_TR_CATEGORIES; cat++)
>> + {
>> + for (int coeff = 0; coeff < MAX_NUM_TR_COEFFS;
>> coeff++)
>> + m_nr->nrResidualSum[cat][coeff] +=
>> nr->nrResidualSum[cat][coeff];
>> +
>> + m_nr->nrCount[cat] += nr->nrCount[cat];
>> + }
>> + }
>> +
>> + noiseReductionUpdate();
>> +
>> + /* Copy updated NR coefficients back to all worker threads */
>> + for (int i = 0; i < numTLD; i++)
>> + {
>> + NoiseReduction* nr =
>> &m_tld[i].analysis.m_quant.m_frameNr[m_jpId];
>> + memcpy(nr->nrOffsetDenoise, m_nr->nrOffsetDenoise,
>> sizeof(uint16_t)* MAX_NUM_TR_CATEGORIES * MAX_NUM_TR_COEFFS);
>> + memset(nr->nrCount, 0, sizeof(uint32_t)*
>> MAX_NUM_TR_CATEGORIES);
>> + memset(nr->nrResidualSum, 0, sizeof(uint32_t)*
>> MAX_NUM_TR_CATEGORIES * MAX_NUM_TR_COEFFS);
>> + }
>> + }
>> }
>>
>> #if DETAILED_CU_STATS
>> @@ -1253,25 +1288,25 @@
>> int trSize = cat & 3;
>> int coefCount = 1 << ((trSize + 2) * 2);
>>
>> - if (m_nr->count[cat] > maxBlocksPerTrSize[trSize])
>> + if (m_nr->nrCount[cat] > maxBlocksPerTrSize[trSize])
>> {
>> for (int i = 0; i < coefCount; i++)
>> - m_nr->residualSum[cat][i] >>= 1;
>> - m_nr->count[cat] >>= 1;
>> + m_nr->nrResidualSum[cat][i] >>= 1;
>> + m_nr->nrCount[cat] >>= 1;
>> }
>>
>> int nrStrength = cat < 8 ? m_param->noiseReductionIntra :
>> m_param->noiseReductionInter;
>> - uint64_t scaledCount = (uint64_t)nrStrength * m_nr->count[cat];
>> + uint64_t scaledCount = (uint64_t)nrStrength * m_nr->nrCount[cat];
>>
>> for (int i = 0; i < coefCount; i++)
>> {
>> - uint64_t value = scaledCount + m_nr->residualSum[cat][i] / 2;
>> - uint64_t denom = m_nr->residualSum[cat][i] + 1;
>> - m_nr->offsetDenoise[cat][i] = (uint16_t)(value / denom);
>> + uint64_t value = scaledCount + m_nr->nrResidualSum[cat][i] /
>> 2;
>> + uint64_t denom = m_nr->nrResidualSum[cat][i] + 1;
>> + m_nr->nrOffsetDenoise[cat][i] = (uint16_t)(value / denom);
>> }
>>
>> // Don't denoise DC coefficients
>> - m_nr->offsetDenoise[cat][0] = 0;
>> + m_nr->nrOffsetDenoise[cat][0] = 0;
>> }
>> }
>>
>> diff -r 2980141a744a -r 8878f03570b2 source/encoder/search.cpp
>> --- a/source/encoder/search.cpp Tue Aug 18 12:45:52 2015 +0530
>> +++ b/source/encoder/search.cpp Wed Aug 19 15:29:20 2015 +0530
>> @@ -80,7 +80,7 @@
>> m_me.init(param.searchMethod, param.subpelRefine, param.internalCsp);
>>
>> bool ok = m_quant.init(param.rdoqLevel, param.psyRdoq, scalingList,
>> m_entropyCoder);
>> - if (m_param->noiseReductionIntra || m_param->noiseReductionInter)
>> + if (m_param->noiseReductionIntra || m_param->noiseReductionInter ||
>> m_param->rc.vbvBufferSize)
>> ok &= m_quant.allocNoiseReduction(param);
>>
>> ok &= Predict::allocBuffers(param.internalCsp); /* sets
>> m_hChromaShift & m_vChromaShift */
>> _______________________________________________
>> x265-devel mailing list
>> x265-devel at videolan.org
>> https://mailman.videolan.org/listinfo/x265-devel
>>
>
>
> _______________________________________________
> x265-devel mailing list
> x265-devel at videolan.org
> https://mailman.videolan.org/listinfo/x265-devel
>
>
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