
it appears a one-character typo in the cmake_minimum_required line prevents it from compiling under CMake 4.0. in order to fix that, I had to take this thing out of submodules... it is recommended to do this after you pull; git submodule deinit extern/libsndfile
166 lines
4.3 KiB
C
166 lines
4.3 KiB
C
/*
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** Copyright (C) 2019 Erik de Castro Lopo <erikd@mega-nerd.com>
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** Copyright (C) 2021 Arthur Taylor <art@ified.ca>
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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 Lesser General Public License as published by
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** the Free Software Foundation ; either version 2.1 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 Lesser General Public License for more details.
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**
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** You should have received a copy of the GNU Lesser General Public License
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** along with this program ; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "sfconfig.h"
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#include "sndfile.h"
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#include "common.h"
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#if HAVE_MPEG
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#include "mpeg.h"
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static int mpeg_write_header (SF_PRIVATE *psf, int calc_length) ;
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static int mpeg_command (SF_PRIVATE *psf, int command, void *data, int datasize) ;
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/*------------------------------------------------------------------------------
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* Private functions
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*/
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static int
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mpeg_write_header (SF_PRIVATE *psf, int UNUSED (calc_length))
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{
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if (psf->have_written)
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return 0 ;
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return mpeg_l3_encoder_write_id3tag (psf) ;
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}
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static int
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mpeg_command (SF_PRIVATE *psf, int command, void *data, int datasize)
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{ int bitrate_mode ;
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switch (command)
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{ case SFC_SET_COMPRESSION_LEVEL :
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if (data == NULL || datasize != sizeof (double))
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{ psf->error = SFE_BAD_COMMAND_PARAM ;
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return SF_FALSE ;
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} ;
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if (psf->file.mode != SFM_WRITE)
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{ psf->error = SFE_NOT_WRITEMODE ;
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return SF_FALSE ;
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} ;
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return mpeg_l3_encoder_set_quality (psf, *(double *) data) ;
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case SFC_SET_BITRATE_MODE :
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if (psf->file.mode != SFM_WRITE)
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{ psf->error = SFE_NOT_WRITEMODE ;
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return SF_FALSE ;
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} ;
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if (data == NULL || datasize != sizeof (int))
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{ psf->error = SFE_BAD_COMMAND_PARAM ;
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return SF_FALSE ;
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} ;
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bitrate_mode = *(int *) data ;
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return mpeg_l3_encoder_set_bitrate_mode (psf, bitrate_mode) ;
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case SFC_GET_BITRATE_MODE :
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if (psf->file.mode == SFM_READ)
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return mpeg_decoder_get_bitrate_mode (psf) ;
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else
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return mpeg_l3_encoder_get_bitrate_mode (psf) ;
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default :
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return SF_FALSE ;
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} ;
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return SF_FALSE ;
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} /* mpeg_command */
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/*------------------------------------------------------------------------------
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* Public functions
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*/
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int
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mpeg_init (SF_PRIVATE *psf, int bitrate_mode, int write_metadata)
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{ int error ;
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if (psf->file.mode == SFM_RDWR)
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return SFE_BAD_MODE_RW ;
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if (psf->file.mode == SFM_WRITE)
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{ switch (SF_CODEC (psf->sf.format))
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{ case SF_FORMAT_MPEG_LAYER_III :
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if ((error = mpeg_l3_encoder_init (psf, write_metadata)))
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return error ;
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mpeg_l3_encoder_set_bitrate_mode (psf, bitrate_mode) ;
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if (write_metadata)
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{ /* ID3 support */
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psf->strings.flags = SF_STR_ALLOW_START ;
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psf->write_header = mpeg_write_header ;
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} ;
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break ;
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case SF_FORMAT_MPEG_LAYER_I :
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case SF_FORMAT_MPEG_LAYER_II :
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psf_log_printf (psf, "MPEG Layer I and II encoding is not yet supported.\n") ;
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return SFE_UNIMPLEMENTED ;
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default:
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psf_log_printf (psf, "%s: bad psf->sf.format 0x%x.\n", __func__, psf->sf.format) ;
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return SFE_INTERNAL ;
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} ;
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} ;
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if (psf->file.mode == SFM_READ)
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{ if ((error = mpeg_decoder_init (psf)))
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return error ;
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} ;
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return 0 ;
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} /* mpeg_init */
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int
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mpeg_open (SF_PRIVATE *psf)
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{ int error ;
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/* Choose variable bitrate mode by default for standalone files.*/
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if ((error = mpeg_init (psf, SF_BITRATE_MODE_VARIABLE, SF_TRUE)))
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return error ;
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psf->dataoffset = 0 ;
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psf->command = mpeg_command ;
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if (psf->filelength != SF_COUNT_MAX)
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psf->datalength = psf->filelength - psf->dataoffset ;
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else
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psf->datalength = SF_COUNT_MAX ;
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return 0 ;
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} /* mpeg_open */
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#else /* HAVE_MPEG */
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int
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mpeg_init (SF_PRIVATE *psf, int UNUSED (bitrate_mode) , int UNUSED (write_metadata))
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{
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psf_log_printf (psf, "This version of libsndfile was compiled without MPEG support.\n") ;
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return SFE_UNIMPLEMENTED ;
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} /* mpeg_init */
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int
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mpeg_open (SF_PRIVATE *psf)
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{
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psf_log_printf (psf, "This version of libsndfile was compiled without MP3 support.\n") ;
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return SFE_UNIMPLEMENTED ;
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} /* mpeg_open */
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#endif
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