mirror of
https://github.com/mstorsjo/fdk-aac.git
synced 2025-02-13 18:00:44 +01:00
4f0d97057c
- Update disclaimer in all source files. - Increment library version in each FDK sub-module. Bug 9428126 Change-Id: I490b96d4ee472246b01483202b0bb4f1e9c2a5d7
265 lines
10 KiB
C
265 lines
10 KiB
C
|
|
/* -----------------------------------------------------------------------------------------------------------
|
|
Software License for The Fraunhofer FDK AAC Codec Library for Android
|
|
|
|
© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung 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-4 AAC Encoder **************************
|
|
|
|
Author(s):
|
|
Description:
|
|
|
|
******************************************************************************/
|
|
|
|
#ifndef TPENC_LATM_H
|
|
#define TPENC_LATM_H
|
|
|
|
|
|
|
|
#include "tpenc_lib.h"
|
|
#include "FDK_bitstream.h"
|
|
|
|
|
|
#define DEFAULT_LATM_NR_OF_SUBFRAMES 1
|
|
#define DEFAULT_LATM_SMC_REPEAT 8
|
|
|
|
#define MAX_AAC_LAYERS 9
|
|
|
|
#define LATM_MAX_PROGRAMS 1
|
|
#define LATM_MAX_STREAM_ID 16
|
|
|
|
#define LATM_MAX_LAYERS 1 /*MAX_AAC_LAYERS*/
|
|
|
|
#define MAX_NR_OF_SUBFRAMES 2 /* set this carefully to avoid buffer overflows */
|
|
|
|
typedef enum { LATMVAR_SIMPLE_SEQUENCE } LATM_VAR_MODE;
|
|
|
|
typedef struct {
|
|
signed int frameLengthType;
|
|
signed int frameLengthBits;
|
|
signed int varFrameLengthTable[4];
|
|
signed int streamID;
|
|
} LATM_LAYER_INFO;
|
|
|
|
|
|
typedef struct {
|
|
LATM_LAYER_INFO m_linfo[LATM_MAX_PROGRAMS][LATM_MAX_LAYERS];
|
|
CODER_CONFIG *config[LATM_MAX_PROGRAMS][LATM_MAX_LAYERS];
|
|
|
|
LATM_VAR_MODE varMode;
|
|
TRANSPORT_TYPE tt;
|
|
|
|
int audioMuxLengthBytes;
|
|
|
|
int audioMuxLengthBytesPos;
|
|
int taraBufferFullness; /* state of the bit reservoir */
|
|
int varStreamCnt;
|
|
unsigned int otherDataLenBytes;
|
|
|
|
UCHAR latmFrameCounter; /* Current frame number. Counts modulo muxConfigPeriod */
|
|
UCHAR muxConfigPeriod; /* Distance in frames between MuxConfig */
|
|
|
|
UCHAR audioMuxVersion; /* AMV1 supports transmission of taraBufferFullness and ASC lengths */
|
|
UCHAR audioMuxVersionA; /* for future extensions */
|
|
|
|
UCHAR noProgram;
|
|
UCHAR noLayer[LATM_MAX_PROGRAMS];
|
|
UCHAR fractDelayPresent;
|
|
|
|
UCHAR allStreamsSameTimeFraming;
|
|
UCHAR subFrameCnt; /* Current Subframe frame */
|
|
UCHAR noSubframes; /* Number of subframes */
|
|
UINT latmSubframeStart; /* Position of current subframe start */
|
|
UCHAR noSubframes_next;
|
|
|
|
UCHAR fillBits; /* AudioMuxElement fill bits */
|
|
UCHAR streamMuxConfigBits;
|
|
|
|
} LATM_STREAM;
|
|
|
|
typedef LATM_STREAM *HANDLE_LATM_STREAM;
|
|
|
|
/**
|
|
* \brief Initialize LATM_STREAM Handle. Creates automatically one program with one layer with
|
|
* the given layerConfig. The layerConfig must be persisten because references to this pointer
|
|
* are made at any time again.
|
|
* Use transportEnc_Latm_AddLayer() to add more programs/layers.
|
|
*
|
|
* \param hLatmStreamInfo HANDLE_LATM_STREAM handle
|
|
* \param hBs Bitstream handle
|
|
* \param layerConfig a valid CODER_CONFIG struct containing the current audio configuration parameters
|
|
* \param audioMuxVersion the LATM audioMuxVersion to be used
|
|
* \param tt the specific TRANSPORT_TYPE to be used, either TT_MP4_LOAS, TT_MP4_LATM_MCP1 or TT_MP4_LATM_MCP0 LOAS
|
|
* \param cb callback information structure.
|
|
*
|
|
* \return an TRANSPORTENC_ERROR error code
|
|
*/
|
|
TRANSPORTENC_ERROR transportEnc_Latm_Init(
|
|
HANDLE_LATM_STREAM hLatmStreamInfo,
|
|
HANDLE_FDK_BITSTREAM hBs,
|
|
CODER_CONFIG *layerConfig,
|
|
UINT audioMuxVersion,
|
|
TRANSPORT_TYPE tt,
|
|
CSTpCallBacks *cb
|
|
);
|
|
|
|
/**
|
|
* \brief Get bit demand of next LATM/LOAS header
|
|
*
|
|
* \param hAss HANDLE_LATM_STREAM handle
|
|
* \param streamDataLength the length of the payload
|
|
*
|
|
* \return the number of bits required by the LATM/LOAS headers
|
|
*/
|
|
unsigned int transportEnc_LatmCountTotalBitDemandHeader (
|
|
HANDLE_LATM_STREAM hAss,
|
|
unsigned int streamDataLength
|
|
);
|
|
|
|
/**
|
|
* \brief Write LATM/LOAS header into given bitstream handle
|
|
*
|
|
* \param hLatmStreamInfo HANDLE_LATM_STREAM handle
|
|
* \param hBitstream Bitstream handle
|
|
* \param auBits amount of current payload bits
|
|
* \param bufferFullness LATM buffer fullness value
|
|
* \param cb callback information structure.
|
|
*
|
|
* \return an TRANSPORTENC_ERROR error code
|
|
*/
|
|
TRANSPORTENC_ERROR
|
|
transportEnc_LatmWrite (
|
|
HANDLE_LATM_STREAM hAss,
|
|
HANDLE_FDK_BITSTREAM hBitstream,
|
|
int auBits,
|
|
int bufferFullness,
|
|
CSTpCallBacks *cb
|
|
);
|
|
|
|
/**
|
|
* \brief Adjust bit count relative to current subframe
|
|
*
|
|
* \param hAss HANDLE_LATM_STREAM handle
|
|
* \param pBits pointer to an int, where the current frame bit count is contained,
|
|
* and where the subframe relative bit count will be returned into
|
|
*
|
|
* \return void
|
|
*/
|
|
void transportEnc_LatmAdjustSubframeBits(HANDLE_LATM_STREAM hAss,
|
|
int *pBits);
|
|
|
|
/**
|
|
* \brief Request an LATM frame, which may, or may not be available
|
|
*
|
|
* \param hAss HANDLE_LATM_STREAM handle
|
|
* \param hBs Bitstream handle
|
|
* \param pBytes pointer to an int, where the current frame byte count stored into.
|
|
* A return value of zero means that currently no LATM/LOAS frame can be returned.
|
|
* The latter is expected in case of multiple subframes being used.
|
|
*
|
|
* \return void
|
|
*/
|
|
void transportEnc_LatmGetFrame(
|
|
HANDLE_LATM_STREAM hAss,
|
|
HANDLE_FDK_BITSTREAM hBs,
|
|
int *pBytes
|
|
);
|
|
|
|
/**
|
|
* \brief Write a StreamMuxConfig into the given bitstream handle
|
|
*
|
|
* \param hAss HANDLE_LATM_STREAM handle
|
|
* \param hBs Bitstream handle
|
|
* \param bufferFullness LATM buffer fullness value
|
|
* \param cb callback information structure.
|
|
*
|
|
* \return void
|
|
*/
|
|
TRANSPORTENC_ERROR
|
|
CreateStreamMuxConfig(
|
|
HANDLE_LATM_STREAM hAss,
|
|
HANDLE_FDK_BITSTREAM hBs,
|
|
int bufferFullness,
|
|
CSTpCallBacks *cb
|
|
);
|
|
|
|
|
|
#endif /* TPENC_LATM_H */
|