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Viewing changes to src/decoder/FlacPcm.cxx

  • Committer: Package Import Robot
  • Author(s): Steve Kowalik
  • Date: 2013-11-12 18:17:40 UTC
  • mfrom: (2.2.36 sid)
  • Revision ID: package-import@ubuntu.com-20131112181740-72aa4zihehoobedp
Tags: 0.18.3-1ubuntu1
* Merge from Debian unstable.  Remaining changes:
  - Add libmp3lame-dev to Build-Depends, and enable LAME.
  - Read the user for the daemon from the config file in the init script.
  - Move avahi-daemon from Suggests to Recommends.
  - Added apport hook to include user configuration file.

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src/decoder/FlacPcm.cxx
 
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/*
 
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 * Copyright (C) 2003-2013 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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#include "config.h"
 
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#include "FlacPcm.hxx"
 
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#include <assert.h>
 
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static void flac_convert_stereo16(int16_t *dest,
 
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                                  const FLAC__int32 * const buf[],
 
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                                  unsigned int position, unsigned int end)
 
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{
 
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        for (; position < end; ++position) {
 
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                *dest++ = buf[0][position];
 
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                *dest++ = buf[1][position];
 
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        }
 
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}
 
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static void
 
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flac_convert_16(int16_t *dest,
 
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                unsigned int num_channels,
 
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                const FLAC__int32 * const buf[],
 
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                unsigned int position, unsigned int end)
 
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{
 
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        unsigned int c_chan;
 
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        for (; position < end; ++position)
 
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                for (c_chan = 0; c_chan < num_channels; c_chan++)
 
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                        *dest++ = buf[c_chan][position];
 
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}
 
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/**
 
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 * Note: this function also handles 24 bit files!
 
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 */
 
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static void
 
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flac_convert_32(int32_t *dest,
 
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                unsigned int num_channels,
 
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                const FLAC__int32 * const buf[],
 
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                unsigned int position, unsigned int end)
 
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{
 
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        unsigned int c_chan;
 
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        for (; position < end; ++position)
 
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                for (c_chan = 0; c_chan < num_channels; c_chan++)
 
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                        *dest++ = buf[c_chan][position];
 
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}
 
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static void
 
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flac_convert_8(int8_t *dest,
 
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               unsigned int num_channels,
 
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               const FLAC__int32 * const buf[],
 
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               unsigned int position, unsigned int end)
 
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{
 
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        unsigned int c_chan;
 
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        for (; position < end; ++position)
 
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                for (c_chan = 0; c_chan < num_channels; c_chan++)
 
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                        *dest++ = buf[c_chan][position];
 
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}
 
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void
 
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flac_convert(void *dest,
 
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             unsigned int num_channels, SampleFormat sample_format,
 
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             const FLAC__int32 *const buf[],
 
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             unsigned int position, unsigned int end)
 
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{
 
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        switch (sample_format) {
 
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        case SampleFormat::S16:
 
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                if (num_channels == 2)
 
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                        flac_convert_stereo16((int16_t*)dest, buf,
 
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                                              position, end);
 
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                else
 
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                        flac_convert_16((int16_t*)dest, num_channels, buf,
 
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                                        position, end);
 
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                break;
 
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        case SampleFormat::S24_P32:
 
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        case SampleFormat::S32:
 
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                flac_convert_32((int32_t*)dest, num_channels, buf,
 
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                                position, end);
 
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                break;
 
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        case SampleFormat::S8:
 
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                flac_convert_8((int8_t*)dest, num_channels, buf,
 
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                               position, end);
 
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                break;
 
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        case SampleFormat::FLOAT:
 
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        case SampleFormat::DSD:
 
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        case SampleFormat::UNDEFINED:
 
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                assert(false);
 
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                gcc_unreachable();
 
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        }
 
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}