b99ecb4dc9
For simplicity, the MPD core should not have to deal with packing. It is rarely used, and those plugins that need it should use the pcm_export library instead.
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/*
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* Copyright (C) 2003-2011 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef PCM_CONVERT_H
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#define PCM_CONVERT_H
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#include "pcm_dsd.h"
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#include "pcm_resample.h"
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#include "pcm_dither.h"
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#include "pcm_buffer.h"
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struct audio_format;
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/**
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* This object is statically allocated (within another struct), and
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* holds buffer allocations and the state for all kinds of PCM
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* conversions.
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*/
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struct pcm_convert_state {
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struct pcm_dsd dsd;
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struct pcm_resample_state resample;
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struct pcm_dither dither;
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/** the buffer for converting the sample format */
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struct pcm_buffer format_buffer;
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/** the buffer for converting the channel count */
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struct pcm_buffer channels_buffer;
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};
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static inline GQuark
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pcm_convert_quark(void)
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{
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return g_quark_from_static_string("pcm_convert");
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}
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/**
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* Initializes a pcm_convert_state object.
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*/
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void pcm_convert_init(struct pcm_convert_state *state);
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/**
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* Deinitializes a pcm_convert_state object and frees allocated
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* memory.
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*/
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void pcm_convert_deinit(struct pcm_convert_state *state);
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/**
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* Reset the pcm_convert_state object. Use this at the boundary
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* between two distinct songs and each time the format changes.
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*/
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void
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pcm_convert_reset(struct pcm_convert_state *state);
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/**
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* Converts PCM data between two audio formats.
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*
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* @param state an initialized pcm_convert_state object
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* @param src_format the source audio format
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* @param src the source PCM buffer
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* @param src_size the size of #src in bytes
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* @param dest_format the requested destination audio format
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* @param dest_size_r returns the number of bytes of the destination buffer
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* @param error_r location to store the error occurring, or NULL to
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* ignore errors
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* @return the destination buffer, or NULL on error
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*/
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const void *
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pcm_convert(struct pcm_convert_state *state,
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const struct audio_format *src_format,
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const void *src, size_t src_size,
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const struct audio_format *dest_format,
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size_t *dest_size_r,
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GError **error_r);
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#endif
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