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/*
Copyright (C) 2004 Allan Sandfeld Jensen <kde@carewolf.com>
Copyright (C) 2005 Benjamin Meyer <ben at meyerhome dot net>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "encoderflac.h"
#ifdef HAVE_LIBFLAC
#include <FLAC/format.h>
#include <FLAC/metadata.h>
#include <FLAC/stream_encoder.h>
#include <kconfig.h>
#include <kdebug.h>
#if !defined FLAC_API_VERSION_CURRENT || FLAC_API_VERSION_CURRENT < 8
#define LEGACY_FLAC
#else
#undef LEGACY_FLAC
#endif
extern "C"
{
KDE_EXPORT void create_audiocd_encoders(KIO::SlaveBase *slave, TQPtrList<AudioCDEncoder> &encoders)
{
encoders.append(new EncoderFLAC(slave));
}
}
class EncoderFLAC::Private {
public:
FLAC__StreamEncoder *encoder;
FLAC__StreamMetadata** metadata;
KIO::SlaveBase* ioslave;
unsigned long data;
};
#ifdef LEGACY_FLAC
static FLAC__StreamEncoderWriteStatus WriteCallback(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
#else
static FLAC__StreamEncoderWriteStatus WriteCallback(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data)
#endif
{
EncoderFLAC::Private *d = (EncoderFLAC::Private*)client_data;
d->data += bytes;
TQByteArray output;
if (bytes) {
output.setRawData((const char*)buffer, bytes);
d->ioslave->data(output);
output.resetRawData((const char*)buffer, bytes);
}
return FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
}
static void MetadataCallback (const FLAC__StreamEncoder *encoder, const FLAC__StreamMetadata *metadata, void *client_data)
{
// We do not have seekable writeback so we just discard the updated metadata
}
/*
static FLAC__SeekableStreamEncoderSeektqStatus SeekCallback(const FLAC__SeekableStreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data)
{} ; */
EncoderFLAC::EncoderFLAC(KIO::SlaveBase *slave) : AudioCDEncoder(slave) {
d = new Private();
d->ioslave = slave;
d->encoder = 0;
}
EncoderFLAC::~EncoderFLAC() {
if (d->encoder) FLAC__stream_encoder_delete(d->encoder);
delete d;
}
bool EncoderFLAC::init(){
d->encoder = FLAC__stream_encoder_new();
d->metadata = 0;
d->data = 0;
return true;
}
void EncoderFLAC::loadSettings() {
// config->setGroup("FLAC");
}
// Estimate size to be 5/8 of uncompresed size.
unsigned long EncoderFLAC::size(long time_secs) const {
long uncompressed = (time_secs * (44100*2*2));
return (uncompressed/8)*5 + 1000;
}
long EncoderFLAC::readInit(long size) {
kdDebug(7117) << "EncoderFLAC::readInit() called"<< endl;
d->data = 0;
#ifdef LEGACY_FLAC
FLAC__stream_encoder_set_write_callback(d->encoder, WriteCallback);
FLAC__stream_encoder_set_metadata_callback(d->encoder, MetadataCallback);
FLAC__stream_encoder_set_client_data(d->encoder, d);
#endif
// The options match approximely those of flac compression-level-3
FLAC__stream_encoder_set_do_mid_side_stereo(d->encoder, true);
FLAC__stream_encoder_set_loose_mid_side_stereo(d->encoder, true); // flac -M
FLAC__stream_encoder_set_max_lpc_order(d->encoder, 6); // flac -l6
FLAC__stream_encoder_set_min_residual_partition_order(d->encoder, 3);
FLAC__stream_encoder_set_max_residual_partition_order(d->encoder, 3); // flac -r3,3
FLAC__stream_encoder_set_blocksize(d->encoder, 4608);
FLAC__stream_encoder_set_streamable_subset(d->encoder, true);
if (size > 0)
FLAC__stream_encoder_set_total_samples_estimate(d->encoder, size/4);
#ifdef LEGACY_FLAC
if(FLAC__stream_encoder_init(d->encoder) != FLAC__STREAM_ENCODER_OK)
; // really should handle an init failure
#else
if(FLAC__stream_encoder_init_stream(d->encoder, WriteCallback, NULL, NULL, MetadataCallback, d) != FLAC__STREAM_ENCODER_INIT_STATUS_OK)
; // really should handle an init failure
#endif
return d->data;
}
long EncoderFLAC::read(int16_t * buf, int frames)
{
unsigned long olddata = d->data;
FLAC__int32 *buffer = new FLAC__int32[frames*2];
for(int i=0; i<frames*2;i++) {
buffer[i] = (FLAC__int32)buf[i];
}
bool res = FLAC__stream_encoder_process_interleaved (d->encoder, buffer, frames);
delete[] buffer;
return d->data - olddata;
}
long EncoderFLAC::readCleanup()
{
FLAC__stream_encoder_finish(d->encoder);
// FLAC__stream_encoder_delete(d->encoder);
if (d->metadata) {
FLAC__metadata_object_delete(d->metadata[0]);
delete[] d->metadata;
d->metadata = 0;
}
return 0;
}
void EncoderFLAC::fillSongInfo( KCDDB::CDInfo info, int track, const TQString &comment )
{
d->metadata = new FLAC__StreamMetadata*[1];
d->metadata[0] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT);
// d->metadata[1] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
// d->metadata[2] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE)
typedef TQPair<TQString, TQVariant> Comment;
Comment comments[7] = { Comment("Title", info.trackInfoList[track].get("title")),
Comment("Artist", info.get("artist")),
Comment("Album", info.get("title")),
Comment("Genre", info.get("genre")),
Comment("Tracknumber", TQString::number(track+1)),
Comment("Comment", comment),
Comment("Date", TQString() )};
if (info.get("Year").toInt() > 0) {
TQDateTime dt(TQDate(info.get("Year").toInt(), 1, 1));
comments[6] = Comment("Date", dt.toString(Qt::ISODate));
}
FLAC__StreamMetadata_VorbisComment_Entry entry;
TQString field;
TQCString cfield;
int num_comments = 0;
for(int i=0; i<7; i++) {
if (!comments[i].second.toString().isEmpty()) {
field = comments[i].first+"="+comments[i].second.toString();
cfield = field.utf8();
entry.entry = (FLAC__byte*)qstrdup(cfield);
entry.length = cfield.length();
// Insert in vorbiscomment and assign ownership of pointers to FLAC
FLAC__metadata_object_vorbiscomment_insert_comment(d->metadata[0], num_comments, entry, false);
num_comments++;
}
}
FLAC__stream_encoder_set_metadata(d->encoder, d->metadata, 1);
}
#endif // HAVE_LIBFLAC
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