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98 lines
3.4 KiB
98 lines
3.4 KiB
/*----------------------------------------------------------------------------
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*
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* File:
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* eas_audioconst.h
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*
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* Contents and purpose:
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* Defines audio constants related to the sample rate, bit size, etc.
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*
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*
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* Copyright Sonic Network Inc. 2005
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*----------------------------------------------------------------------------
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* Revision Control:
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* $Revision: 82 $
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* $Date: 2006-07-10 11:45:19 -0700 (Mon, 10 Jul 2006) $
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*----------------------------------------------------------------------------
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*/
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#ifndef _EAS_AUDIOCONST_H
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#define _EAS_AUDIOCONST_H
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/*----------------------------------------------------------------------------
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* These macros define the various characteristics of the defined sample rates
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*----------------------------------------------------------------------------
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* BUFFER_SIZE_IN_MONO_SAMPLES size of buffer in samples
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* _OUTPUT_SAMPLE_RATE compiled output sample rate
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* AUDIO_FRAME_LENGTH length of an audio frame in 256ths of a millisecond
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* SYNTH_UPDATE_PERIOD_IN_BITS length of an audio frame (2^x samples)
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*----------------------------------------------------------------------------
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*/
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#if defined (_SAMPLE_RATE_8000)
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#define BUFFER_SIZE_IN_MONO_SAMPLES 32
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#define _OUTPUT_SAMPLE_RATE 8000
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#define AUDIO_FRAME_LENGTH 1024
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#define SYNTH_UPDATE_PERIOD_IN_BITS 5
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#elif defined (_SAMPLE_RATE_16000)
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#define BUFFER_SIZE_IN_MONO_SAMPLES 64
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#define _OUTPUT_SAMPLE_RATE 16000
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#define AUDIO_FRAME_LENGTH 1024
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#define SYNTH_UPDATE_PERIOD_IN_BITS 6
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#elif defined (_SAMPLE_RATE_20000)
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#define BUFFER_SIZE_IN_MONO_SAMPLES 128
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#define _OUTPUT_SAMPLE_RATE 20000
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#define AUDIO_FRAME_LENGTH 1638
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#define SYNTH_UPDATE_PERIOD_IN_BITS 7
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#elif defined (_SAMPLE_RATE_22050)
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#define BUFFER_SIZE_IN_MONO_SAMPLES 128
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#define _OUTPUT_SAMPLE_RATE 22050
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#define AUDIO_FRAME_LENGTH 1486
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#define SYNTH_UPDATE_PERIOD_IN_BITS 7
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#elif defined (_SAMPLE_RATE_24000)
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#define BUFFER_SIZE_IN_MONO_SAMPLES 128
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#define _OUTPUT_SAMPLE_RATE 24000
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#define AUDIO_FRAME_LENGTH 1365
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#define SYNTH_UPDATE_PERIOD_IN_BITS 7
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#elif defined (_SAMPLE_RATE_32000)
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#define BUFFER_SIZE_IN_MONO_SAMPLES 128
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#define _OUTPUT_SAMPLE_RATE 32000
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#define AUDIO_FRAME_LENGTH 1024
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#define SYNTH_UPDATE_PERIOD_IN_BITS 7
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#elif defined (_SAMPLE_RATE_44100)
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#define BUFFER_SIZE_IN_MONO_SAMPLES 256
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#define _OUTPUT_SAMPLE_RATE 44100
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#define AUDIO_FRAME_LENGTH 1486
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#define SYNTH_UPDATE_PERIOD_IN_BITS 8
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#elif defined (_SAMPLE_RATE_48000)
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#define BUFFER_SIZE_IN_MONO_SAMPLES 256
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#define _OUTPUT_SAMPLE_RATE 48000
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#define AUDIO_FRAME_LENGTH 1365
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#define SYNTH_UPDATE_PERIOD_IN_BITS 8
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#else
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#error "_SAMPLE_RATE_XXXXX must be defined to valid rate"
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#endif
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#endif /* #ifndef _EAS_AUDIOCONST_H */
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