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