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/***************************************************************************
* Copyright (C) 2005-2019 by the FIFE team *
* http://www.fifengine.net *
* This file is part of FIFE. *
* *
* FIFE is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or (at your option) any later version. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
***************************************************************************/
// Standard C++ library includes
// Platform specific includes
// 3rd party library includes
// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "util/log/logger.h"
#include "util/base/exception.h"
#include "sounddecoder_ogg.h"
namespace FIFE {
/** Logger to use for this source file.
* @relates Logger
*/
static Logger _log(LM_AUDIO);
/* OggVorbis Callback functions
*/
namespace OGG_cb {
static size_t read(void *ptr, size_t size, size_t nmemb, void *datasource) {
RawData* rdp = reinterpret_cast<RawData*>(datasource);
size_t restlen = rdp->getDataLength()-rdp->getCurrentIndex();
size_t len = (restlen<=size*nmemb)?restlen:size*nmemb;
if (len) {
rdp->readInto(reinterpret_cast<uint8_t *>(ptr), len);
}
return len;
}
static int32_t seek(void *datasource, ogg_int64_t offset, int32_t whence) {
RawData* rdp = reinterpret_cast<RawData*>(datasource);
switch (whence) {
case SEEK_SET:
(*rdp).setIndex(static_cast<uint32_t>(offset));
return 0;
case SEEK_CUR:
(*rdp).moveIndex(static_cast<uint32_t>(offset));
return 0;
case SEEK_END:
(*rdp).setIndex( (*rdp).getDataLength() -1 + static_cast<uint32_t>(offset));
return 0;
}
return -1;
}
static int32_t close(void *datasource) { return 0; }
static long tell(void *datasource) {
RawData* rdp = reinterpret_cast<RawData*>(datasource);
return (*rdp).getCurrentIndex();
}
}
SoundDecoderOgg::SoundDecoderOgg(RawData* rdp) : m_file(rdp) {
ov_callbacks ocb = {
OGG_cb::read, OGG_cb::seek, OGG_cb::close, OGG_cb::tell
};
if (0 > ov_open_callbacks(m_file.get(), &m_ovf, 0, 0, ocb)) {
throw InvalidFormat("Error opening OggVorbis file");
}
vorbis_info* vi = ov_info(&m_ovf, -1);
if (!vi) {
throw InvalidFormat("Error fetching OggVorbis info");
}
if (!ov_seekable(&m_ovf)) {
throw InvalidFormat("OggVorbis file has to be seekable");
}
m_isstereo = vi->channels == 2;
m_samplerate = vi->rate;
m_is8bit = false;
m_declength = (m_isstereo ? 2 : 1) * 2 * ov_pcm_total(&m_ovf, -1);
m_datasize = 0;
m_data = NULL;
}
SoundDecoderOgg::~SoundDecoderOgg() {
releaseBuffer();
ov_clear(&m_ovf);
}
bool SoundDecoderOgg::decode(uint64_t length) {
int32_t stream = 0;
int32_t ret = 0;
// release buffer and allocate new memory
releaseBuffer();
m_data = new char[length];
// decode the stream
m_datasize = 0;
while (length-m_datasize > 0) {
ret = ov_read(&m_ovf, m_data + m_datasize, length-m_datasize, 0, 2, 1, &stream);
if (ret > 0) {
m_datasize += ret;
} else if (ret == OV_HOLE) {
continue;
} else if (ret == 0 || ret <= OV_EREAD) {
break;
}
}
return m_datasize == 0;
}
bool SoundDecoderOgg::setCursor(uint64_t pos) {
if (ov_pcm_seek(&m_ovf, pos / ((m_isstereo ? 2 : 1) * 2)) == 0) {
return true;
}
return false;
}
void SoundDecoderOgg::releaseBuffer() {
if (m_data != NULL) {
delete[] m_data;
m_data = NULL;
}
}
}
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