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/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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 "MmsInputPlugin.hxx"
#include "input/ThreadInputStream.hxx"
#include "input/InputPlugin.hxx"
#include "system/Error.hxx"
#include "util/ASCII.hxx"
#include <libmms/mmsx.h>
#include <stdexcept>
static constexpr size_t MMS_BUFFER_SIZE = 256 * 1024;
class MmsInputStream final : public ThreadInputStream {
mmsx_t *mms;
public:
MmsInputStream(const char *_uri, Mutex &_mutex)
:ThreadInputStream(input_plugin_mms.name, _uri, _mutex,
MMS_BUFFER_SIZE) {
}
~MmsInputStream() noexcept override {
Stop();
}
protected:
virtual void Open() override;
virtual size_t ThreadRead(void *ptr, size_t size) override;
void Close() noexcept override {
mmsx_close(mms);
}
};
void
MmsInputStream::Open()
{
{
const ScopeUnlock unlock(mutex);
mms = mmsx_connect(nullptr, nullptr, GetURI(), 128 * 1024);
if (mms == nullptr)
throw std::runtime_error("mmsx_connect() failed");
}
/* TODO: is this correct? at least this selects the ffmpeg
decoder, which seems to work fine */
SetMimeType("audio/x-ms-wma");
}
static InputStreamPtr
input_mms_open(const char *url,
Mutex &mutex)
{
auto m = std::make_unique<MmsInputStream>(url, mutex);
m->Start();
return m;
}
size_t
MmsInputStream::ThreadRead(void *ptr, size_t read_size)
{
/* unfortunately, mmsx_read() blocks until the whole buffer
has been filled; to avoid big latencies, limit the size of
each chunk we read to a reasonable size */
constexpr size_t MAX_CHUNK = 16384;
if (read_size > MAX_CHUNK)
read_size = MAX_CHUNK;
int nbytes = mmsx_read(nullptr, mms, (char *)ptr, read_size);
if (nbytes <= 0) {
if (nbytes < 0)
throw MakeErrno("mmsx_read() failed");
return 0;
}
return (size_t)nbytes;
}
static constexpr const char *mms_prefixes[] = {
"mms://",
"mmsh://",
"mmst://",
"mmsu://",
nullptr
};
const InputPlugin input_plugin_mms = {
"mms",
mms_prefixes,
nullptr,
nullptr,
input_mms_open,
};
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