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| author | Jean-Michel Trivi <jmtrivi@google.com> | 2016-04-05 17:43:33 +0000 |
|---|---|---|
| committer | android-build-merger <android-build-merger@google.com> | 2016-04-05 17:43:33 +0000 |
| commit | 65750eae6583754ea9d84fed41dc12d1fc3d73d0 (patch) | |
| tree | a8dc54ef8dba931c72627e7bbebf1844b81a31f7 /libAACenc/include/aacenc_lib.h | |
| parent | 0713b4acff1a489e7d49725dc7c5e3dad370b5c8 (diff) | |
| parent | e1c78ed73faa51f2c7fcb0c4a17a92be9cc747f5 (diff) | |
| download | fdk-aac-65750eae6583754ea9d84fed41dc12d1fc3d73d0.tar.gz fdk-aac-65750eae6583754ea9d84fed41dc12d1fc3d73d0.tar.bz2 fdk-aac-65750eae6583754ea9d84fed41dc12d1fc3d73d0.zip | |
SBR/AAC encoder updates, code clean up
am: e1c78ed
* commit 'e1c78ed73faa51f2c7fcb0c4a17a92be9cc747f5':
SBR/AAC encoder updates, code clean up
Change-Id: I908adc47823de593c3e258c67f360da9321780f5
Diffstat (limited to 'libAACenc/include/aacenc_lib.h')
| -rw-r--r-- | libAACenc/include/aacenc_lib.h | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/libAACenc/include/aacenc_lib.h b/libAACenc/include/aacenc_lib.h index 8c0e1cd..828a917 100644 --- a/libAACenc/include/aacenc_lib.h +++ b/libAACenc/include/aacenc_lib.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 @@ -897,11 +897,7 @@ typedef enum This configuration can be used only with stereo input audio data. - 23: MPEG-4 AAC Low-Delay. - 39: MPEG-4 AAC Enhanced Low-Delay. Since there is no ::AUDIO_OBJECT_TYPE for ELD in - combination with SBR defined, enable SBR explicitely by ::AACENC_SBR_MODE parameter. - - 129: MPEG-2 AAC Low Complexity. - - 132: MPEG-2 AAC Low Complexity with Spectral Band Replication (HE-AAC). - - 156: MPEG-2 AAC Low Complexity with Spectral Band Replication and Parametric Stereo (HE-AAC v2). - This configuration can be used only with stereo input audio data. */ + combination with SBR defined, enable SBR explicitely by ::AACENC_SBR_MODE parameter. */ AACENC_BITRATE = 0x0101, /*!< Total encoder bitrate. This parameter is mandatory and interacts with ::AACENC_BITRATEMODE. - CBR: Bitrate in bits/second. @@ -958,6 +954,16 @@ typedef enum - 1 to fs/2: Frequency bandwidth in Hertz. (Experts only, better do not touch this value to avoid degraded audio quality) */ + AACENC_PEAK_BITRATE = 0x0207, /*!< Peak bitrate configuration parameter to adjust maximum bits per audio frame. Bitrate is in bits/second. + The peak bitrate will internally be limited to the chosen bitrate ::AACENC_BITRATE as lower limit + and the number_of_effective_channels*6144 bit as upper limit. + + Setting the peak bitrate equal to ::AACENC_BITRATE does not necessarily mean that the audio frames + will be of constant size. Since the peak bitate is in bits/second, the frame sizes can vary by + one byte in one or the other direction over various frames. However, it is not recommended to reduce + the peak pitrate to ::AACENC_BITRATE - it would disable the bitreservoir, which would affect the + audio quality by a large amount. */ + AACENC_TRANSMUX = 0x0300, /*!< Transport type to be used. See ::TRANSPORT_TYPE in FDK_audio.h. Following types can be configured in encoder library: - 0: raw access units @@ -1023,6 +1029,11 @@ typedef enum - ADTS: Maximum number of sub frames restricted to 4. - LOAS/LATM: Maximum number of sub frames restricted to 2.*/ + AACENC_AUDIOMUXVER = 0x0304, /*!< AudioMuxVersion to be used for LATM. (AudioMuxVersionA, currently not implemented): + - 0: Default, no transmission of tara Buffer fullness, no ASC length and including actual latm Buffer fullnes. + - 1: Transmission of tara Buffer fullness, ASC length and actual latm Buffer fullness. + - 2: Transmission of tara Buffer fullness, ASC length and maximum level of latm Buffer fullness. */ + AACENC_PROTECTION = 0x0306, /*!< Configure protection in tranpsort layer: - 0: No protection. (default) - 1: CRC active for ADTS bitstream format. */ |