diff options
Diffstat (limited to 'media/libstagefright/codecs/aacenc/src/aacenc_core.c')
| -rw-r--r-- | media/libstagefright/codecs/aacenc/src/aacenc_core.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacenc/src/aacenc_core.c b/media/libstagefright/codecs/aacenc/src/aacenc_core.c new file mode 100644 index 0000000..616475c --- /dev/null +++ b/media/libstagefright/codecs/aacenc/src/aacenc_core.c @@ -0,0 +1,239 @@ +/*
+ ** Copyright 2003-2010, VisualOn, Inc.
+ **
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ **
+ ** http://www.apache.org/licenses/LICENSE-2.0
+ **
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ */
+/*******************************************************************************
+ File: aacenc_core.c
+
+ Content: aac encoder core functions
+
+*******************************************************************************/ + +#include "typedef.h" +#include "aacenc_core.h" +#include "bitenc.h" + +#include "psy_configuration.h" +#include "psy_main.h" +#include "qc_main.h" +#include "psy_main.h" +#include "channel_map.h" +#include "aac_rom.h" + +/******************************************************************************** +* +* function name: AacInitDefaultConfig +* description: gives reasonable default configuration +* +**********************************************************************************/ +void AacInitDefaultConfig(AACENC_CONFIG *config) +{ + /* default configurations */ + config->adtsUsed = 1; + config->nChannelsIn = 2; + config->nChannelsOut = 2; + config->bitRate = 128000; + config->bandWidth = 0; +} + +/******************************************************************************** +* +* function name: AacEncOpen +* description: allocate and initialize a new encoder instance +* returns: 0 if success +* +**********************************************************************************/ +Word16 AacEncOpen( AAC_ENCODER* hAacEnc, /* pointer to an encoder handle, initialized on return */ + const AACENC_CONFIG config /* pre-initialized config struct */ + ) +{ + Word32 i;
+ Word32 error = 0; + Word16 profile = 1;
+ + ELEMENT_INFO *elInfo = NULL; + + if (hAacEnc==0) { + error=1; + } + + if (!error) { + hAacEnc->config = config; + } + + if (!error) { + error = InitElementInfo (config.nChannelsOut, + &hAacEnc->elInfo); + } +
+ if (!error) { + elInfo = &hAacEnc->elInfo; + } + + if (!error) { + /* use or not tns tool for long and short block */ + Word16 tnsMask=3; + + /* init encoder psychoacoustic */ + error = psyMainInit(&hAacEnc->psyKernel, + config.sampleRate, + config.bitRate, + elInfo->nChannelsInEl, + tnsMask, + hAacEnc->config.bandWidth); + } + + /* use or not adts header */ + if(!error) {
+ hAacEnc->qcOut.qcElement.adtsUsed = config.adtsUsed;
+ } + + /* init encoder quantization */ + if (!error) { + struct QC_INIT qcInit; + + /*qcInit.channelMapping = &hAacEnc->channelMapping;*/ + qcInit.elInfo = &hAacEnc->elInfo; + + qcInit.maxBits = (Word16) (MAXBITS_COEF*elInfo->nChannelsInEl); + qcInit.bitRes = qcInit.maxBits; + qcInit.averageBits = (Word16) ((config.bitRate * FRAME_LEN_LONG) / config.sampleRate); + + qcInit.padding.paddingRest = config.sampleRate; + + qcInit.meanPe = (Word16) ((10 * FRAME_LEN_LONG * hAacEnc->config.bandWidth) / + (config.sampleRate>>1)); + + qcInit.maxBitFac = (Word16) ((100 * (MAXBITS_COEF-MINBITS_COEF)* elInfo->nChannelsInEl)/ + (qcInit.averageBits?qcInit.averageBits:1)); + + qcInit.bitrate = config.bitRate; + + error = QCInit(&hAacEnc->qcKernel, &qcInit); + } + + /* init bitstream encoder */ + if (!error) { + hAacEnc->bseInit.nChannels = elInfo->nChannelsInEl; + hAacEnc->bseInit.bitrate = config.bitRate; + hAacEnc->bseInit.sampleRate = config.sampleRate; + hAacEnc->bseInit.profile = profile; + } + + return error; +} + +/******************************************************************************** +* +* function name: AacEncEncode +* description: encode pcm to aac data core function +* returns: 0 if success +* +**********************************************************************************/ +Word16 AacEncEncode(AAC_ENCODER *aacEnc, /*!< an encoder handle */ + Word16 *timeSignal, /*!< BLOCKSIZE*nChannels audio samples, interleaved */ + const UWord8 *ancBytes, /*!< pointer to ancillary data bytes */ + Word16 *numAncBytes, /*!< number of ancillary Data Bytes */ + UWord8 *outBytes, /*!< pointer to output buffer (must be large MINBITS_COEF/8*MAX_CHANNELS bytes) */ + Word32 *numOutBytes /*!< number of bytes in output buffer after processing */ + ) +{ + ELEMENT_INFO *elInfo = &aacEnc->elInfo; + Word16 globUsedBits; + Word16 ancDataBytes, ancDataBytesLeft; + + ancDataBytes = ancDataBytesLeft = *numAncBytes; + + /* init output aac data buffer and length */ + aacEnc->hBitStream = CreateBitBuffer(&aacEnc->bitStream, outBytes, *numOutBytes); + + /* psychoacoustic process */ + psyMain(aacEnc->config.nChannelsOut, + elInfo, + timeSignal, + &aacEnc->psyKernel.psyData[elInfo->ChannelIndex[0]], + &aacEnc->psyKernel.tnsData[elInfo->ChannelIndex[0]], + &aacEnc->psyKernel.psyConfLong, + &aacEnc->psyKernel.psyConfShort, + &aacEnc->psyOut.psyOutChannel[elInfo->ChannelIndex[0]], + &aacEnc->psyOut.psyOutElement, + aacEnc->psyKernel.pScratchTns, + aacEnc->config.sampleRate); + + /* adjust bitrate and frame length */ + AdjustBitrate(&aacEnc->qcKernel, + aacEnc->config.bitRate, + aacEnc->config.sampleRate); + + /* quantization and coding process */ + QCMain(&aacEnc->qcKernel, + &aacEnc->qcKernel.elementBits, + &aacEnc->qcKernel.adjThr.adjThrStateElem, + &aacEnc->psyOut.psyOutChannel[elInfo->ChannelIndex[0]], + &aacEnc->psyOut.psyOutElement, + &aacEnc->qcOut.qcChannel[elInfo->ChannelIndex[0]], + &aacEnc->qcOut.qcElement, + elInfo->nChannelsInEl, + min(ancDataBytesLeft,ancDataBytes)); + + ancDataBytesLeft = ancDataBytesLeft - ancDataBytes; + + globUsedBits = FinalizeBitConsumption(&aacEnc->qcKernel, + &aacEnc->qcOut); + + /* write bitstream process */ + WriteBitstream(aacEnc->hBitStream, + *elInfo, + &aacEnc->qcOut, + &aacEnc->psyOut, + &globUsedBits, + ancBytes,
+ aacEnc->psyKernel.sampleRateIdx); + + updateBitres(&aacEnc->qcKernel, + &aacEnc->qcOut); + + /* write out the bitstream */ + *numOutBytes = GetBitsAvail(aacEnc->hBitStream) >> 3;
+ + return 0; +} + + +/******************************************************************************** +* +* function name:AacEncClose +* description: deallocate an encoder instance +* +**********************************************************************************/ +void AacEncClose (AAC_ENCODER* hAacEnc, VO_MEM_OPERATOR *pMemOP) +{ + if (hAacEnc) { + QCDelete(&hAacEnc->qcKernel, pMemOP); + + QCOutDelete(&hAacEnc->qcOut, pMemOP); + + PsyDelete(&hAacEnc->psyKernel, pMemOP); + + PsyOutDelete(&hAacEnc->psyOut, pMemOP); + + DeleteBitBuffer(&hAacEnc->hBitStream); + + if(hAacEnc->intbuf) + { + mem_free(pMemOP, hAacEnc->intbuf, VO_INDEX_ENC_AAC); + hAacEnc->intbuf = NULL; + } + } +} |