34a092a997
Because casting to and from "enum dsp_id" just adds noise, change everything to unsigned int. Change-Id: I52a7ae55f406e673d5b811b29657fcdc4b62ab10
74 lines
3.3 KiB
C
74 lines
3.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2012 Michael Sevakis
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef DSP_SAMPLE_IO_H
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#define DSP_SAMPLE_IO_H
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/* 16-bit samples are scaled based on these constants. The shift should be
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* no more than 15.
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*/
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#define WORD_SHIFT 12
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#define WORD_FRACBITS 27
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#define NATIVE_DEPTH 16
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struct sample_io_data;
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/* DSP initial buffer input function call prototype */
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typedef void (*sample_input_fn_type)(struct sample_io_data *this,
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struct dsp_buffer **buf_p);
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/* DSP final buffer output function call prototype */
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typedef void (*sample_output_fn_type)(struct sample_io_data *this,
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struct dsp_buffer *src,
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struct dsp_buffer *dst);
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/* This becomes part of the DSP aggregate */
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struct sample_io_data
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{
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int outcount; /* 00h: Output count */
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struct sample_format format; /* Format for next dsp_process call */
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int sample_depth; /* Codec-specified sample depth */
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int stereo_mode; /* Codec-specified channel format */
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sample_input_fn_type input_samples; /* Initial input function */
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struct dsp_buffer sample_buf; /* Buffer descriptor for converted samples */
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int32_t *sample_buf_p[2]; /* Internal format buffer pointers */
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sample_output_fn_type output_samples; /* Final output function */
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unsigned int output_sampr; /* Master output samplerate */
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uint8_t format_dirty; /* Format change set, avoids superfluous
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increments before carrying it out */
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uint8_t output_version; /* Format version of src buffer at output */
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};
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void dsp_sample_input_init(struct sample_io_data *this, unsigned int dsp_id);
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void dsp_sample_input_flush(struct sample_io_data *this);
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void dsp_sample_input_format_change(struct sample_io_data *this,
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struct sample_format *format);
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void dsp_sample_output_init(struct sample_io_data *this);
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void dsp_sample_output_flush(struct sample_io_data *this);
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void dsp_sample_output_format_change(struct sample_io_data *this,
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struct sample_format *format);
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/* Sample IO watches the format setting from the codec */
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bool dsp_sample_io_configure(struct sample_io_data *this,
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unsigned int setting,
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intptr_t *value_p);
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#endif /* DSP_SAMPLE_IO_H */
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