mirror of
https://github.com/w23/xash3d-fwgs
synced 2024-12-16 14:10:11 +01:00
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
/*
|
|
libmpg.c - compact version of famous library mpg123
|
|
Copyright (C) 2017 Uncle Mike
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
*/
|
|
|
|
#include "mpg123.h"
|
|
#include "libmpg.h"
|
|
|
|
void *create_decoder( int *error )
|
|
{
|
|
void *mpg;
|
|
int ret;
|
|
|
|
if( error ) *error = 0;
|
|
mpg123_init();
|
|
|
|
mpg = mpg123_new( &ret );
|
|
if( !mpg ) return NULL;
|
|
|
|
ret = mpg123_param( mpg, MPG123_FLAGS, MPG123_FUZZY|MPG123_SEEKBUFFER|MPG123_GAPLESS );
|
|
if( ret != MPG123_OK && error )
|
|
*error = 1;
|
|
|
|
// let the seek index auto-grow and contain an entry for every frame
|
|
ret = mpg123_param( mpg, MPG123_INDEX_SIZE, -1 );
|
|
if( ret != MPG123_OK && error )
|
|
*error = 1;
|
|
|
|
return mpg;
|
|
}
|
|
|
|
int feed_mpeg_header( void *mpg, const byte *data, long bufsize, long streamsize, wavinfo_t *sc )
|
|
{
|
|
mpg123_handle_t *mh = (mpg123_handle_t *)mpg;
|
|
int ret, no;
|
|
|
|
if( !mh || !sc ) return 0;
|
|
|
|
ret = mpg123_open_feed( mh );
|
|
if( ret != MPG123_OK )
|
|
return 0;
|
|
|
|
// feed input chunk and get first chunk of decoded audio.
|
|
ret = mpg123_decode( mh, data, bufsize, NULL, 0, NULL );
|
|
|
|
if( ret != MPG123_NEW_FORMAT )
|
|
return 0; // there were errors
|
|
|
|
mpg123_getformat( mh, &sc->rate, &sc->channels, &no );
|
|
mpg123_format_none( mh );
|
|
mpg123_format( mh, sc->rate, sc->channels, MPG123_ENC_SIGNED_16 );
|
|
|
|
// some hacking to get function get_songlen to working properly
|
|
mh->rdat.filelen = streamsize;
|
|
sc->playtime = get_songlen( mh, -1 ) * 1000;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int feed_mpeg_stream( void *mpg, const byte *data, long bufsize, byte *outbuf, size_t *outsize )
|
|
{
|
|
switch( mpg123_decode( mpg, data, bufsize, outbuf, OUTBUF_SIZE, outsize ))
|
|
{
|
|
case MPG123_NEED_MORE:
|
|
return MP3_NEED_MORE;
|
|
case MPG123_OK:
|
|
return MP3_OK;
|
|
default:
|
|
return MP3_ERR;
|
|
}
|
|
}
|
|
|
|
int open_mpeg_stream( void *mpg, void *file, pfread f_read, pfseek f_seek, wavinfo_t *sc )
|
|
{
|
|
mpg123_handle_t *mh = (mpg123_handle_t *)mpg;
|
|
int ret, no;
|
|
|
|
if( !mh || !sc ) return 0;
|
|
|
|
ret = mpg123_replace_reader_handle( mh, (void *)f_read, (void *)f_seek, NULL );
|
|
if( ret != MPG123_OK )
|
|
return 0;
|
|
|
|
ret = mpg123_open_handle( mh, file );
|
|
if( ret != MPG123_OK )
|
|
return 0;
|
|
|
|
ret = mpg123_getformat( mh, &sc->rate, &sc->channels, &no );
|
|
if( ret != MPG123_OK )
|
|
return 0;
|
|
|
|
mpg123_format_none( mh );
|
|
mpg123_format( mh, sc->rate, sc->channels, MPG123_ENC_SIGNED_16 );
|
|
sc->playtime = get_songlen( mh, -1 ) * 1000;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int read_mpeg_stream( void *mpg, byte *outbuf, size_t *outsize )
|
|
{
|
|
switch( mpg123_read( mpg, outbuf, OUTBUF_SIZE, outsize ))
|
|
{
|
|
case MPG123_OK:
|
|
return MP3_OK;
|
|
default:
|
|
return MP3_ERR;
|
|
}
|
|
}
|
|
|
|
int get_stream_pos( void *mpg )
|
|
{
|
|
return mpg123_tell( mpg );
|
|
}
|
|
|
|
int set_stream_pos( void *mpg, int curpos )
|
|
{
|
|
return mpg123_seek( mpg, curpos, SEEK_SET );
|
|
}
|
|
|
|
void close_decoder( void *mpg )
|
|
{
|
|
mpg123_delete( mpg );
|
|
mpg123_exit();
|
|
}
|