added opus plugin

git-svn-id: http://svn.code.sf.net/p/qmmp-dev/code/trunk/qmmp@3256 90c681e8-e032-0410-971d-27865f9a5e38

1 files changed, 159 insertions, 0 deletions

diff --git a/src/plugins/Input/opus/decoder_opus.cpp b/src/plugins/Input/opus/decoder_opus.cpp
new file mode 100644
index 000000000..b8fda17fb
--- /dev/null
+++ b/src/plugins/Input/opus/decoder_opus.cpp
@@ -0,0 +1,159 @@
+/***************************************************************************
+ *   Copyright (C) 2013 by Ilya Kotov                                      *
+ *   forkotov02@hotmail.ru                                                 *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program 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 General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
+ ***************************************************************************/
+
+#include <QObject>
+#include <QIODevice>
+#include <qmmp/buffer.h>
+#include <qmmp/output.h>
+#include <qmmp/fileinfo.h>
+#include "decoder_opus.h"
+
+// ic functions for libopusfile
+static int opusread (void *src, unsigned char *buf,int size)
+{
+    DecoderOpus *d = (DecoderOpus *) src;
+    return d->input()->read((char *) buf, size);
+}
+
+static int opusseek(void *src, opus_int64 offset, int whence)
+{
+    DecoderOpus *d = (DecoderOpus *) src;
+    if (d->input()->isSequential())
+        return -1;
+    long start = 0;
+    switch (whence)
+    {
+    case SEEK_END:
+        start = d->input()->size();
+        break;
+
+    case SEEK_CUR:
+        start = d->input()->pos();
+        break;
+
+    case SEEK_SET:
+    default:
+        start = 0;
+    }
+
+    if (d->input()->seek(start + offset))
+        return 0;
+    return -1;
+}
+
+static opus_int64  opustell(void *src)
+{
+    DecoderOpus *dogg = (DecoderOpus *) src;
+    return (long) dogg->input()->pos();
+}
+
+// Decoder class
+DecoderOpus::DecoderOpus(const QString &url, QIODevice *i) : Decoder(i)
+{
+    m_totalTime = 0;
+    m_opusfile = 0;
+    m_chan = 0;
+    m_bitrate = 0;
+    m_url = url;
+}
+
+DecoderOpus::~DecoderOpus()
+{
+    if (m_opusfile)
+        op_free(m_opusfile);
+    m_opusfile = 0;
+}
+
+bool DecoderOpus::initialize()
+{
+    qDebug("DecoderOpus: initialize");
+    quint32 freq = 0;
+    m_chan = 0;
+    m_totalTime = 0;
+
+    if (!input())
+    {
+        qDebug("DecoderOpus: cannot initialize.  No input");
+        return false;
+    }
+
+    if (!input()->isOpen())
+    {
+        if (!input()->open(QIODevice::ReadOnly))
+        {
+            qWarning("DecoderOpus: unable to open input. Error: %s",qPrintable(input()->errorString()));
+            return false;
+        }
+    }
+
+    OpusFileCallbacks opuscb =
+    {
+        opusread,
+        opusseek,
+        opustell,
+        0,
+    };
+    m_opusfile = op_open_callbacks(this, &opuscb, 0, 0, 0);
+
+    if (!m_opusfile)
+    {
+        qWarning("DecoderOpus: cannot open stream");
+        return false;
+    }
+
+    m_bitrate = op_bitrate(m_opusfile, -1) / 1000;
+
+    if((m_totalTime = op_pcm_total(m_opusfile, -1) / 48) < 0)
+        m_totalTime = 0;
+
+    const OpusHead *head = op_head(m_opusfile, -1);
+    if (head)
+    {
+        freq = head->input_sample_rate;
+        m_chan =  head->channel_count;
+    }
+    configure(freq, m_chan, Qmmp::PCM_S16LE);
+    return true;
+}
+
+qint64 DecoderOpus::totalTime()
+{
+    if (!m_opusfile)
+        return 0;
+    return m_totalTime;
+}
+
+int DecoderOpus::bitrate()
+{
+    return m_bitrate;
+}
+
+void DecoderOpus::seek(qint64 time)
+{
+    op_pcm_seek(m_opusfile, time*48);
+}
+
+qint64 DecoderOpus::read(char *data, qint64 maxSize)
+{
+    int samples = maxSize / 2 / m_chan;
+    samples = op_read(m_opusfile, (opus_int16 *)data, samples, 0);
+    m_bitrate = op_bitrate_instant(m_opusfile) / 1000;
+    return samples * m_chan * 2;
+}