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| author | Jean-Michel Trivi <jmtrivi@google.com> | 2013-12-30 16:01:08 -0800 |
|---|---|---|
| committer | Jean-Michel Trivi <jmtrivi@google.com> | 2014-03-31 23:41:44 +0000 |
| commit | 603f48ab99ce76f552f4f6f85d06b8c5b94c698e (patch) | |
| tree | 303937f6779cdb798e3cec67ebe32abb39eab15b /libAACdec/include | |
| parent | 629f60c0e71f4a5ad273d5ab3fc6964e5eb1f9f4 (diff) | |
| download | aac-603f48ab99ce76f552f4f6f85d06b8c5b94c698e.tar.gz | |
AAC Decoder: introduce time domain limiter
Introduce time domain limiter. The module is per default enabled for all
AAC-LC and HE-AAC v1/2 streams. For all ER-AAC-LD and ER-AAC-ELD streams
the limiter is disabled per default. The feature can be en- or disabled
via dynamic API parameter. Note that the limiter introduces an additional
output delay which depends on the module parameters and the streams
sampling rate.
Bug 9428126
Change-Id: I299a072340b33e2c324facbd347a72c8de3d380e
Diffstat (limited to 'libAACdec/include')
| -rw-r--r-- | libAACdec/include/aacdecoder_lib.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libAACdec/include/aacdecoder_lib.h b/libAACdec/include/aacdecoder_lib.h index 0253c5c..a281ab9 100644 --- a/libAACdec/include/aacdecoder_lib.h +++ b/libAACdec/include/aacdecoder_lib.h @@ -436,6 +436,16 @@ typedef enum 2: Create a dual mono output signal from channel 2. \n 3: Create a dual mono output signal by mixing both channels (L' = R' = 0.5*Ch1 + 0.5*Ch2). */ AAC_PCM_OUTPUT_CHANNEL_MAPPING = 0x0003, /*!< Output buffer channel ordering. 0: MPEG PCE style order, 1: WAV file channel order (default). */ + AAC_PCM_LIMITER_ENABLE = 0x0004, /*!< Enable signal level limiting. \n + -1: Auto-config. Enable limiter for all non-lowdelay configurations by default. \n + 0: Disable limiter in general. \n + 1: Enable limiter always. + It is recommended to call the decoder with a AACDEC_CLRHIST flag to reset all states when + the limiter switch is changed explicitly. */ + AAC_PCM_LIMITER_ATTACK_TIME = 0x0005, /*!< Signal level limiting attack time in ms. + Default confguration is 15 ms. Adjustable range from 1 ms to 15 ms. */ + AAC_PCM_LIMITER_RELEAS_TIME = 0x0006, /*!< Signal level limiting release time in ms. + Default configuration is 50 ms. Adjustable time must be larger than 0 ms. */ AAC_PCM_MIN_OUTPUT_CHANNELS = 0x0011, /*!< Minimum number of PCM output channels. If higher than the number of encoded audio channels, a simple channel extension is applied. \n -1, 0: Disable channel extenstion feature. The decoder output contains the same number of |