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/*
* Copyright 2003-2016 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 "config.h"
#include "DecoderAPI.hxx"
#include "DecoderControl.hxx"
#include "Bridge.hxx"
#include "input/InputStream.hxx"
#include "Log.hxx"
#include <assert.h>
size_t
decoder_read(DecoderClient *client,
InputStream &is,
void *buffer, size_t length)
try {
assert(buffer != nullptr);
/* XXX don't allow client==nullptr */
if (client == nullptr)
return is.LockRead(buffer, length);
auto &bridge = *(DecoderBridge *)client;
assert(bridge.dc.state == DecoderState::START ||
bridge.dc.state == DecoderState::DECODE);
if (length == 0)
return 0;
ScopeLock lock(is.mutex);
while (true) {
if (bridge.CheckCancelRead())
return 0;
if (is.IsAvailable())
break;
is.cond.wait(is.mutex);
}
size_t nbytes = is.Read(buffer, length);
assert(nbytes > 0 || is.IsEOF());
return nbytes;
} catch (const std::runtime_error &e) {
auto *bridge = (DecoderBridge *)client;
if (bridge != nullptr)
bridge->error = std::current_exception();
else
LogError(e);
return 0;
}
bool
decoder_read_full(DecoderClient *client, InputStream &is,
void *_buffer, size_t size)
{
uint8_t *buffer = (uint8_t *)_buffer;
while (size > 0) {
size_t nbytes = decoder_read(client, is, buffer, size);
if (nbytes == 0)
return false;
buffer += nbytes;
size -= nbytes;
}
return true;
}
bool
decoder_skip(DecoderClient *client, InputStream &is, size_t size)
{
while (size > 0) {
char buffer[1024];
size_t nbytes = decoder_read(client, is, buffer,
std::min(sizeof(buffer), size));
if (nbytes == 0)
return false;
size -= nbytes;
}
return true;
}
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