159 lines
2.9 KiB
C++
159 lines
2.9 KiB
C++
/* Mednafen - Multi-system Emulator
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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
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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 <mednafen/mednafen.h>
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#include "CDAFReader.h"
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#include "CDAFReader_Vorbis.h"
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#if 0
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#include <tremor/ivorbisfile.h>
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#else
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#include <mednafen/tremor/ivorbisfile.h>
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#endif
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class CDAFReader_Vorbis final : public CDAFReader
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{
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public:
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CDAFReader_Vorbis(Stream *fp);
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~CDAFReader_Vorbis();
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uint64 Read_(int16 *buffer, uint64 frames) override;
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bool Seek_(uint64 frame_offset) override;
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uint64 FrameCount(void) override;
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private:
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OggVorbis_File ovfile;
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Stream *fw;
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};
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static size_t iov_read_func(void *ptr, size_t size, size_t nmemb, void *user_data)
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{
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Stream *fw = (Stream*)user_data;
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if(!size)
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return(0);
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try
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{
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return fw->read(ptr, size * nmemb, false) / size;
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}
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catch(...)
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{
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return(0);
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}
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}
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static int iov_seek_func(void *user_data, ogg_int64_t offset, int whence)
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{
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Stream *fw = (Stream*)user_data;
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try
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{
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fw->seek(offset, whence);
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return(0);
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}
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catch(...)
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{
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return(-1);
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}
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}
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static int iov_close_func(void *user_data)
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{
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Stream *fw = (Stream*)user_data;
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try
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{
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fw->close();
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return(0);
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}
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catch(...)
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{
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return EOF;
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}
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}
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static long iov_tell_func(void *user_data)
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{
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Stream *fw = (Stream*)user_data;
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try
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{
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return fw->tell();
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}
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catch(...)
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{
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return(-1);
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}
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}
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CDAFReader_Vorbis::CDAFReader_Vorbis(Stream *fp) : fw(fp)
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{
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ov_callbacks cb;
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memset(&cb, 0, sizeof(cb));
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cb.read_func = iov_read_func;
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cb.seek_func = iov_seek_func;
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cb.close_func = iov_close_func;
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cb.tell_func = iov_tell_func;
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if(ov_open_callbacks(fp, &ovfile, NULL, 0, cb))
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throw(0);
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}
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CDAFReader_Vorbis::~CDAFReader_Vorbis()
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{
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ov_clear(&ovfile);
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}
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uint64 CDAFReader_Vorbis::Read_(int16 *buffer, uint64 frames)
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{
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uint8 *tw_buf = (uint8 *)buffer;
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int cursection = 0;
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long toread = frames * sizeof(int16) * 2;
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while(toread > 0)
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{
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long didread = ov_read(&ovfile, (char*)tw_buf, toread, &cursection);
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if(didread == 0)
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break;
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tw_buf = (uint8 *)tw_buf + didread;
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toread -= didread;
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}
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return(frames - toread / sizeof(int16) / 2);
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}
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bool CDAFReader_Vorbis::Seek_(uint64 frame_offset)
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{
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ov_pcm_seek(&ovfile, frame_offset);
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return(true);
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}
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uint64 CDAFReader_Vorbis::FrameCount(void)
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{
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return(ov_pcm_total(&ovfile, -1));
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}
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CDAFReader* CDAFR_Vorbis_Open(Stream* fp)
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{
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return new CDAFReader_Vorbis(fp);
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}
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