diff options
Diffstat (limited to 'libAACenc/src/aacenc.h')
| -rw-r--r-- | libAACenc/src/aacenc.h | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/libAACenc/src/aacenc.h b/libAACenc/src/aacenc.h index 87fc3e8..79524b5 100644 --- a/libAACenc/src/aacenc.h +++ b/libAACenc/src/aacenc.h @@ -2,7 +2,7 @@ /* ----------------------------------------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. +© Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. All rights reserved. 1. INTRODUCTION @@ -98,6 +98,11 @@ amm-info@iis.fraunhofer.de #include "sbr_encoder.h" +#define BITRES_MAX_LD 4000 +#define BITRES_MIN_LD 500 +#define BITRATE_MAX_LD 70000 /* Max assumed bitrate for bitres calculation */ +#define BITRATE_MIN_LD 12000 /* Min assumed bitrate for bitres calculation */ + #ifdef __cplusplus extern "C" { #endif @@ -204,6 +209,8 @@ struct AACENC_CONFIG { INT maxBitsPerFrame; /* maximum number of bits in AU */ INT bitreservoir; /* size of bitreservoir */ + INT audioMuxVersion; /* audio mux version in loas/latm transport format */ + UINT sbrRatio; /* sbr sampling rate ratio: dual- or single-rate */ UCHAR useTns; /* flag: use temporal noise shaping */ @@ -223,6 +230,36 @@ typedef struct { typedef struct AAC_ENC *HANDLE_AAC_ENC; /** + * \brief Calculate framesize in bits for given bit rate, frame length and sampling rate. + * + * \param bitRate Ttarget bitrate in bits per second. + * \param frameLength Number of audio samples in one frame. + * \param samplingRate Sampling rate in Hz. + * + * \return Framesize in bits per frame. +*/ +INT FDKaacEnc_CalcBitsPerFrame( + const INT bitRate, + const INT frameLength, + const INT samplingRate + ); + +/** + * \brief Calculate bitrate in bits per second for given framesize, frame length and sampling rate. + * + * \param bitsPerFrame Framesize in bits per frame. + * \param frameLength Number of audio samples in one frame. + * \param samplingRate Sampling rate in Hz. + * + * \return Bitrate in bits per second. +*/ +INT FDKaacEnc_CalcBitrate( + const INT bitsPerFrame, + const INT frameLength, + const INT samplingRate + ); + +/** * \brief Limit given bit rate to a valid value * \param hTpEnc transport encoder handle * \param coreSamplingRate the sample rate to be used for the AAC encoder |