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+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+� Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V.
+ All rights reserved.
+
+ 1. INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
+the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
+This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
+audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
+independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
+of the MPEG specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
+may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
+individually for the purpose of encoding or decoding bit streams in products that are compliant with
+the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
+these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
+software may already be covered under those patent licenses when it is used for those licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
+are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
+applications information and documentation.
+
+2. COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification, are permitted without
+payment of copyright license fees provided that you satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
+your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation and/or other materials
+provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
+You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived from this library without
+prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
+software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
+and the date of any change. For modified versions of the FDK AAC Codec, the term
+"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
+"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
+
+3. NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
+ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
+respect to this software.
+
+You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
+by appropriate patent licenses.
+
+4. DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
+"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
+of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
+including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
+or business interruption, however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of this software, even if
+advised of the possibility of such damage.
+
+5. CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------------------------------------- */
+
+/******************************** MPEG Audio Encoder **************************
+
+ Initial author: serge
+ contents/description: DAB Transport Headers support
+
+******************************************************************************/
+#include <stdio.h>
+#include "FDK_audio.h"
+#include "tpenc_dab.h"
+
+
+#include "tpenc_lib.h"
+#include "tpenc_asc.h"
+
+
+int dabWrite_CrcStartReg(
+ HANDLE_DAB pDab, /*!< pointer to dab stucture */
+ HANDLE_FDK_BITSTREAM hBs, /*!< handle to current bit buffer structure */
+ int mBits /*!< number of bits in crc region */
+ )
+{
+ //fprintf(stderr, "dabWrite_CrcStartReg(%p): bits in crc region=%d\n", hBs, mBits);
+ //return ( FDKcrcStartReg(&pDab->crcInfo, hBs, mBits) );
+}
+
+void dabWrite_CrcEndReg(
+ HANDLE_DAB pDab, /*!< pointer to dab crc info stucture */
+ HANDLE_FDK_BITSTREAM hBs, /*!< handle to current bit buffer structure */
+ int reg /*!< crc region */
+ )
+{
+ //fprintf(stderr, "dabWrite_CrcEndReg(%p): crc region=%d\n", hBs, reg);
+ //FDKcrcEndReg(&pDab->crcInfo, hBs, reg);
+}
+
+int dabWrite_GetHeaderBits( HANDLE_DAB hDab )
+{
+ int bits = 0;
+
+ if (hDab->currentBlock == 0) {
+ /* Static and variable header bits */
+ bits += 16; //header_firecode 16
+ bits += 8; //rfa=1, dac_rate=1, sbr_flag=1, aac_channel_mode=1, ps_flag=1, mpeg_surround_config=3
+ bits += 12 * hDab->num_raw_blocks; //au_start[1...num_aus] 12 bit AU start position markers
+
+ //4 byte alignment
+ if (hDab->dac_rate == 0 || hDab->sbr_flag == 0)
+ bits+=4;
+ //16sbr => 16 + 5 + 3 + 12*(2-1) => 36 => 40 bits 5
+ //24sbr => 16 + 5 + 3 + 12*(3-1) => 48 ok 6
+ //32sbr => 16 + 5 + 3 + 12*(4-1) => 60 => 64 bits 8
+ //48sbr => 16 + 5 + 3 + 12*(6-1) => 84 => 88 bits 11
+ }
+
+ /* Add raw data block CRC bits. Not really part of the header, put they cause bit overhead to be accounted. */
+ bits += 16;
+
+
+ return bits;
+}
+
+
+int dabWrite_CountTotalBitDemandHeader( HANDLE_DAB hDab, unsigned int streamDataLength )
+{
+ fprintf(stderr, "streamDataLength=%d (%d bytes)\n", streamDataLength, streamDataLength >> 3);
+ return dabWrite_GetHeaderBits(hDab);
+}
+
+
+INT dabWrite_Init(HANDLE_DAB hDab, CODER_CONFIG *config)
+{
+ /* Sanity checks */
+ if((int)config->aot > 4
+ || (int)config->aot < 1 ) {
+ return -1;
+ }
+
+ /* Sanity checks DAB-specific */
+ if ( !(config->nSubFrames == 2 && config->samplingRate == 16000 && (config->flags & CC_SBR)) &&
+ !(config->nSubFrames == 3 && config->samplingRate == 24000 && (config->flags & CC_SBR)) &&
+ !(config->nSubFrames == 4 && config->samplingRate == 32000) &&
+ !(config->nSubFrames == 6 && config->samplingRate == 48000)) {
+ return -1;
+ }
+
+ hDab->dac_rate = 0;
+ hDab->aac_channel_mode=0;
+ hDab->sbr_flag = 0;
+ hDab->ps_flag = 0;
+ hDab->mpeg_surround_config=0;
+ hDab->subchannels_num=config->bitRate/8000;
+
+
+ if(config->samplingRate == 24000 || config->samplingRate == 48000)
+ hDab->dac_rate = 1;
+
+ if (config->extAOT==AOT_SBR || config->extAOT == AOT_PS)
+ hDab->sbr_flag = 1;
+
+ if(config->extAOT == AOT_PS)
+ hDab->ps_flag = 1;
+
+
+ if(config->channelMode == MODE_2)
+ hDab->aac_channel_mode = 1;
+
+ fprintf(stderr, "hDab->dac_rate=%d\n", hDab->dac_rate);
+ fprintf(stderr, "hDab->sbr_flag=%d\n", hDab->sbr_flag);
+ fprintf(stderr, "hDab->ps_flag=%d\n", hDab->ps_flag);
+ fprintf(stderr, "hDab->aac_channel_mode=%d\n", hDab->aac_channel_mode);
+ fprintf(stderr, "hDab->subchannels_num=%d\n", hDab->subchannels_num);
+ fprintf(stderr, "cc->nSubFrames=%d\n", config->nSubFrames);
+
+ hDab->num_raw_blocks=config->nSubFrames-1; /* 0 means 1 raw data block */
+
+ FDKcrcInit(&hDab->crcInfo, 0x1021, 0xFFFF, 16);
+ FDKcrcInit(&hDab->crcFire, 0x782d, 0, 16);
+
+ hDab->currentBlock = 0;
+ hDab->headerBits = dabWrite_GetHeaderBits(hDab);
+
+ return 0;
+}
+
+int dabWrite_EncodeHeader(HANDLE_DAB hDab,
+ HANDLE_FDK_BITSTREAM hBitStream,
+ int buffer_fullness,
+ int frame_length)
+{
+ INT crcIndex = 0;
+
+
+ FDK_ASSERT(((frame_length+hDab->headerBits)/8)<0x2000); /*13 bit*/
+ FDK_ASSERT(buffer_fullness<0x800); /* 11 bit */
+
+ FDKcrcReset(&hDab->crcInfo);
+
+
+// fprintf(stderr, "dabWrite_EncodeHeader() hDab->currentBlock=%d, frame_length=%d, buffer_fullness=%d\n",
+// hDab->currentBlock, frame_length, buffer_fullness);
+
+// if (hDab->currentBlock == 0) {
+// //hDab->subFrameStartPrev=dabWrite_GetHeaderBits(hDab);
+// fprintf(stderr, "header bits[%d] [%d]\n", hDab->subFrameStartPrev, hDab->subFrameStartPrev >> 3);
+// FDKresetBitbuffer(hBitStream, BS_WRITER);
+// }
+
+ //hDab->subFrameStartBit = FDKgetValidBits(hBitStream);
+// fprintf(stderr, "dabWrite_EncodeHeader() hDab->subFrameStartBit=%d [%d]\n", hDab->subFrameStartBit, hDab->subFrameStartBit >> 3);
+
+ //hDab->subFrameStartBit = FDKgetValidBits(hBitStream);
+ /* Skip new header if this is raw data block 1..n */
+ if (hDab->currentBlock == 0)
+ {
+ FDKresetBitbuffer(hBitStream, BS_WRITER);
+// fprintf(stderr, "dabWrite_EncodeHeader() after FDKresetBitbuffer=%d [%d]\n", FDKgetValidBits(hBitStream), FDKgetValidBits(hBitStream) >> 3);
+
+ /* fixed header */
+ FDKwriteBits(hBitStream, 0, 16); //header_firecode
+ FDKwriteBits(hBitStream, 0, 1); //rfa
+ FDKwriteBits(hBitStream, hDab->dac_rate, 1);
+ FDKwriteBits(hBitStream, hDab->sbr_flag, 1);
+ FDKwriteBits(hBitStream, hDab->aac_channel_mode, 1);
+ FDKwriteBits(hBitStream, hDab->ps_flag, 1);
+ FDKwriteBits(hBitStream, hDab->mpeg_surround_config, 3);
+ /* variable header */
+ int i;
+ for(i=0; i<hDab->num_raw_blocks; i++)
+ FDKwriteBits(hBitStream, 0, 12);
+ /* padding */
+ if (hDab->dac_rate == 0 || hDab->sbr_flag == 0) {
+ FDKwriteBits(hBitStream, 0, 4);
+ }
+ } /* End of DAB header */
+
+ hDab->subFrameStartBit = FDKgetValidBits(hBitStream);
+ FDK_ASSERT(FDKgetValidBits(hBitStream) % 8 == 0); //only aligned header
+
+// fprintf(stderr, "dabWrite_EncodeHeader() FDKgetValidBits(hBitStream)=%d [%d]\n", FDKgetValidBits(hBitStream), FDKgetValidBits(hBitStream) >> 3);
+ return 0;
+}
+
+void dabWrite_EndRawDataBlock(HANDLE_DAB hDab,
+ HANDLE_FDK_BITSTREAM hBs,
+ int *pBits)
+{
+ FDK_BITSTREAM bsWriter;
+ INT crcIndex = 0;
+ USHORT crcData;
+ INT frameLen = (FDKgetValidBits(hBs) - hDab->subFrameStartBit) >> 3;
+ fprintf(stderr, "frame=%d\n", frameLen);
+ FDK_ASSERT(FDKgetValidBits(hBs) % 8 == 0); //only aligned au's
+ FDK_ASSERT(hDab->subchannels_num*110*8 > FDKgetValidBits(hBs)+2*8); //don't overlap superframe
+
+ FDKinitBitStream(&bsWriter, hBs->hBitBuf.Buffer, hBs->hBitBuf.bufSize, 0, BS_WRITER);
+ FDKpushFor(&bsWriter, hDab->subFrameStartBit);
+ FDKcrcReset(&hDab->crcInfo);
+ hDab->crcIndex = FDKcrcStartReg(&hDab->crcInfo, &bsWriter, 0);
+#if 1
+ if (hDab->currentBlock == hDab->num_raw_blocks) {
+ INT offset_size = hDab->subchannels_num*110*8 - 2*8 - FDKgetValidBits(hBs);
+ fprintf(stderr, "offset_size=%d\n", offset_size >> 3);
+ FDKpushFor(hBs, offset_size);
+ }
+#endif
+
+ FDKpushFor(&bsWriter, FDKgetValidBits(hBs) - hDab->subFrameStartBit);
+ FDKcrcEndReg(&hDab->crcInfo, &bsWriter, hDab->crcIndex);
+ crcData = FDKcrcGetCRC(&hDab->crcInfo);
+ fprintf(stderr, "crcData = %04x\n", crcData);
+ /* Write inverted CRC of current raw data block */
+ FDKwriteBits(hBs, crcData ^ 0xffff, 16);
+ FDKsyncCache(hBs);
+
+
+ /* Write distance to current data block */
+ if(hDab->currentBlock) {
+ FDKinitBitStream(&bsWriter, hBs->hBitBuf.Buffer, hBs->hBitBuf.bufSize, 0, BS_WRITER);
+ FDKpushFor(&bsWriter, 24 + (hDab->currentBlock-1)*12);
+ fprintf(stderr, "FDKwriteBits() = %d\n", hDab->subFrameStartBit>>3);
+ FDKwriteBits(&bsWriter, (hDab->subFrameStartBit>>3), 12);
+ FDKsyncCache(&bsWriter);
+ }
+
+ /* Write FireCode */
+ if (hDab->currentBlock == hDab->num_raw_blocks) {
+ FDKinitBitStream(&bsWriter, hBs->hBitBuf.Buffer, hBs->hBitBuf.bufSize, 0, BS_WRITER);
+ FDKpushFor(&bsWriter, 16);
+
+ FDKcrcReset(&hDab->crcFire);
+ crcIndex = FDKcrcStartReg(&hDab->crcFire, &bsWriter, 72);
+ FDKpushFor(&bsWriter, 9*8); //9bytes
+ FDKcrcEndReg(&hDab->crcFire, &bsWriter, crcIndex);
+
+ crcData = FDKcrcGetCRC(&hDab->crcFire);
+ fprintf(stderr, "Firecode: %04x\n", crcData);
+
+ FDKinitBitStream(&bsWriter, hBs->hBitBuf.Buffer, hBs->hBitBuf.bufSize, 0, BS_WRITER);
+ FDKwriteBits(&bsWriter, crcData, 16);
+ FDKsyncCache(&bsWriter);
+ }
+
+ if (hDab->currentBlock == 0)
+ *pBits += hDab->headerBits;
+ else
+ *pBits += 16;
+
+
+ /* Correct *pBits to reflect the amount of bits of the current subframe */
+ *pBits -= hDab->subFrameStartBit;
+ /* Fixup CRC bits, since they come after each raw data block */
+
+ hDab->currentBlock++;
+ fprintf(stderr, "dabWrite_EndRawDataBlock() *pBits=%d (%d)\n", *pBits, *pBits >> 3);
+}
+
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