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https://github.com/w23/xash3d-fwgs
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The `.editorconfig` file in this repo is configured to trim all trailing whitespace regardless of whether the line is modified. Trims all trailing whitespace in the repository to make the codebase easier to work with in editors that respect `.editorconfig`. `git blame` becomes less useful on these lines but it already isn't very useful. Commands: ``` find . -type f -name '*.h' -exec sed --in-place 's/[[:space:]]\+$//' {} \+ find . -type f -name '*.c' -exec sed --in-place 's/[[:space:]]\+$//' {} \+ ```
264 lines
5.7 KiB
C
264 lines
5.7 KiB
C
/*
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snd_mp3.c - mp3 format loading and streaming
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Copyright (C) 2010 Uncle Mike
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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 3 of the License, or
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(at your option) any later version.
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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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#include "soundlib.h"
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#include "libmpg/libmpg.h"
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/*
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=================================================================
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MPEG decompression
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=================================================================
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*/
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qboolean Sound_LoadMPG( const char *name, const byte *buffer, fs_offset_t filesize )
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{
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void *mpeg;
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size_t pos = 0;
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size_t bytesWrite = 0;
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byte out[OUTBUF_SIZE];
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size_t outsize, padsize;
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int ret;
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wavinfo_t sc;
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// load the file
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if( !buffer || filesize < FRAME_SIZE )
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return false;
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// couldn't create decoder
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if(( mpeg = create_decoder( &ret )) == NULL )
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return false;
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if( ret ) Con_DPrintf( S_ERROR "%s\n", get_error( mpeg ));
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// trying to read header
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if( !feed_mpeg_header( mpeg, buffer, FRAME_SIZE, filesize, &sc ))
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{
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Con_DPrintf( S_ERROR "Sound_LoadMPG: failed to load (%s): %s\n", name, get_error( mpeg ));
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close_decoder( mpeg );
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return false;
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}
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sound.channels = sc.channels;
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sound.rate = sc.rate;
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sound.width = 2; // always 16-bit PCM
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sound.loopstart = -1;
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sound.size = ( sound.channels * sound.rate * sound.width ) * ( sc.playtime / 1000 ); // in bytes
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padsize = sound.size % FRAME_SIZE;
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pos += FRAME_SIZE; // evaluate pos
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if( !sound.size )
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{
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// bad mpeg file ?
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Con_DPrintf( S_ERROR "Sound_LoadMPG: (%s) is probably corrupted\n", name );
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close_decoder( mpeg );
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return false;
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}
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// add sentinel make sure we not overrun
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sound.wav = (byte *)Mem_Calloc( host.soundpool, sound.size + padsize );
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sound.type = WF_PCMDATA;
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// decompress mpg into pcm wav format
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while( bytesWrite < sound.size )
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{
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int size;
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if( feed_mpeg_stream( mpeg, NULL, 0, out, &outsize ) != MP3_OK && outsize <= 0 )
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{
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const byte *data = buffer + pos;
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int bufsize;
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// if there are no bytes remainig so we can decompress the new frame
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if( pos + FRAME_SIZE > filesize )
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bufsize = ( filesize - pos );
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else bufsize = FRAME_SIZE;
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pos += bufsize;
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if( feed_mpeg_stream( mpeg, data, bufsize, out, &outsize ) != MP3_OK )
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break; // there was end of the stream
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}
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if( bytesWrite + outsize > sound.size )
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size = ( sound.size - bytesWrite );
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else size = outsize;
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memcpy( &sound.wav[bytesWrite], out, size );
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bytesWrite += size;
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}
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sound.samples = bytesWrite / ( sound.width * sound.channels );
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close_decoder( mpeg );
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return true;
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}
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/*
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=================
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Stream_OpenMPG
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=================
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*/
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stream_t *Stream_OpenMPG( const char *filename )
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{
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stream_t *stream;
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void *mpeg;
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file_t *file;
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int ret;
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wavinfo_t sc;
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file = FS_Open( filename, "rb", false );
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if( !file ) return NULL;
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// at this point we have valid stream
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stream = Mem_Calloc( host.soundpool, sizeof( stream_t ));
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stream->file = file;
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stream->pos = 0;
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// couldn't create decoder
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if(( mpeg = create_decoder( &ret )) == NULL )
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{
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Con_DPrintf( S_ERROR "Stream_OpenMPG: couldn't create decoder: %s\n", get_error( mpeg ) );
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Mem_Free( stream );
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FS_Close( file );
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return NULL;
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}
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if( ret ) Con_DPrintf( S_ERROR "%s\n", get_error( mpeg ));
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// trying to open stream and read header
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if( !open_mpeg_stream( mpeg, file, (void*)FS_Read, (void*)FS_Seek, &sc ))
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{
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Con_DPrintf( S_ERROR "Stream_OpenMPG: failed to load (%s): %s\n", filename, get_error( mpeg ));
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close_decoder( mpeg );
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Mem_Free( stream );
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FS_Close( file );
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return NULL;
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}
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stream->buffsize = 0; // how many samples left from previous frame
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stream->channels = sc.channels;
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stream->rate = sc.rate;
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stream->width = 2; // always 16 bit
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stream->ptr = mpeg;
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stream->type = WF_MPGDATA;
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return stream;
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}
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/*
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=================
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Stream_ReadMPG
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assume stream is valid
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=================
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*/
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int Stream_ReadMPG( stream_t *stream, int needBytes, void *buffer )
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{
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// buffer handling
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int bytesWritten = 0;
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void *mpg;
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mpg = stream->ptr;
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while( 1 )
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{
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byte *data;
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int outsize;
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if( !stream->buffsize )
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{
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if( read_mpeg_stream( mpg, (byte*)stream->temp, &stream->pos ) != MP3_OK )
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break; // there was end of the stream
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}
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// check remaining size
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if( bytesWritten + stream->pos > needBytes )
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outsize = ( needBytes - bytesWritten );
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else outsize = stream->pos;
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// copy raw sample to output buffer
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data = (byte *)buffer + bytesWritten;
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memcpy( data, &stream->temp[stream->buffsize], outsize );
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bytesWritten += outsize;
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stream->pos -= outsize;
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stream->buffsize += outsize;
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// continue from this sample on a next call
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if( bytesWritten >= needBytes )
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return bytesWritten;
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stream->buffsize = 0; // no bytes remaining
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}
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return 0;
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}
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/*
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=================
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Stream_SetPosMPG
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assume stream is valid
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=================
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*/
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int Stream_SetPosMPG( stream_t *stream, int newpos )
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{
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if( set_stream_pos( stream->ptr, newpos ) != -1 )
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{
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// flush any previous data
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stream->buffsize = 0;
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return true;
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}
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// failed to seek for some reasons
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return false;
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}
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/*
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=================
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Stream_GetPosMPG
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assume stream is valid
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=================
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*/
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int Stream_GetPosMPG( stream_t *stream )
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{
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return get_stream_pos( stream->ptr );
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}
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/*
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=================
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Stream_FreeMPG
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assume stream is valid
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=================
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*/
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void Stream_FreeMPG( stream_t *stream )
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{
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if( stream->ptr )
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{
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close_decoder( stream->ptr );
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stream->ptr = NULL;
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}
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if( stream->file )
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{
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FS_Close( stream->file );
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stream->file = NULL;
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}
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Mem_Free( stream );
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}
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