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//-----------------------------------------------------------------------------
// Name: ogg_loader.cpp
// Developer: Wolfire Games LLC
// Description:
// License: Read below
//-----------------------------------------------------------------------------
//
// Copyright 2022 Wolfire Games LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//-----------------------------------------------------------------------------
#include <Internal/error.h>
#include <Internal/filesystem.h>
#include <Sound/Loader/ogg_loader.h>
#include <Compat/fileio.h>
#include <Logging/logdata.h>
#include <cstring>
#include <cerrno>
#ifdef WIN32
static int _fseek64_wrap(FILE *f,ogg_int64_t off,int whence){
if(f==NULL)return(-1);
return fseek(f,(long)off,whence);
}
static size_t do_read(void *a, size_t b, size_t c, void *d)
{
return fread(a, b, c, (FILE *)d);
}
#endif
oggLoader::oggLoader(Path path) :
m_ogg_file(NULL),
m_vorbis_info(NULL),
m_vorbis_comment(NULL)
{
int result;
ended = false;
if(!(m_ogg_file = my_fopen(path.GetFullPath(), "rb"))) {
DisplayError("Error",("Could not open file: " + path.GetFullPathStr() + " " + strerror(errno) ).c_str());
ended = true;
return;
}
#ifdef WIN32
ov_callbacks callbacks = {
(size_t (*)(void *, size_t, size_t, void *)) fread,
(int (*)(void *, ogg_int64_t, int)) _fseek64_wrap,
(int (*)(void *)) fclose,
(long (*)(void *)) ftell};
if((result = ov_open_callbacks(m_ogg_file, &m_ogg_stream, NULL, 0, callbacks)) < 0)
#else
if((result = ov_open(m_ogg_file, &m_ogg_stream, NULL, 0)) < 0)
#endif
{
DisplayError("Error","Problem with ogg streaming (ov_open failed)");
// only close file pointers if ov_open fails.
fclose(m_ogg_file);
m_ogg_file = NULL;
ended = true;
return;
}
m_vorbis_info = ov_info(&m_ogg_stream, -1);
m_vorbis_comment = ov_comment(&m_ogg_stream, -1);
}
oggLoader::~oggLoader()
{
if (m_ogg_file != NULL)
ov_clear(&m_ogg_stream);
}
int oggLoader::stream_buffer_int16(char *buffer, int size)
{
// ehh, error condition...
if (m_vorbis_info == NULL)
{
::memset(buffer, 0, size);
return 0;
}
int section;
#ifdef __BIG_ENDIAN__
int bigendianp = 1;
#else
int bigendianp = 0;
#endif
int length = ov_read(&m_ogg_stream, buffer, size, bigendianp, 2, 1, §ion);
if( length == 0 )
ended = true;
return length;
}
unsigned long oggLoader::get_sample_count()
{
if (m_ogg_file != NULL)
return (unsigned long)ov_pcm_total(&m_ogg_stream, 0);
else
return 0;
}
unsigned long oggLoader::get_channels()
{
if (m_vorbis_info)
return m_vorbis_info->channels;
else
return 0;
}
int oggLoader::get_sample_rate()
{
if (m_vorbis_info)
return m_vorbis_info->rate;
else
return 0;
}
int oggLoader::rewind()
{
if (m_ogg_file != NULL)
{
ended = false;
return ov_raw_seek_lap(&m_ogg_stream, 0);
}
return -1;
}
bool oggLoader::is_at_end()
{
return ended;
}
int64_t oggLoader::get_pcm_pos()
{
return ov_pcm_tell( &m_ogg_stream );
}
void oggLoader::set_pcm_pos( int64_t pos )
{
int ret = ov_pcm_seek( &m_ogg_stream, pos );
if( ret != 0 )
{
LOGE << "Error seeking in ogg stream " << std::endl;
}
}
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