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/*
* Copyright (C) 2003-2013 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 "NullEncoderPlugin.hxx"
#include "EncoderAPI.hxx"
#include "util/fifo_buffer.h"
extern "C" {
#include "util/growing_fifo.h"
}
#include "Compiler.h"
#include <assert.h>
#include <string.h>
struct NullEncoder final {
Encoder encoder;
struct fifo_buffer *buffer;
NullEncoder():encoder(null_encoder_plugin) {}
};
static Encoder *
null_encoder_init(gcc_unused const config_param ¶m,
gcc_unused Error &error)
{
NullEncoder *encoder = new NullEncoder();
return &encoder->encoder;
}
static void
null_encoder_finish(Encoder *_encoder)
{
NullEncoder *encoder = (NullEncoder *)_encoder;
delete encoder;
}
static void
null_encoder_close(Encoder *_encoder)
{
NullEncoder *encoder = (NullEncoder *)_encoder;
fifo_buffer_free(encoder->buffer);
}
static bool
null_encoder_open(Encoder *_encoder,
gcc_unused AudioFormat &audio_format,
gcc_unused Error &error)
{
NullEncoder *encoder = (NullEncoder *)_encoder;
encoder->buffer = growing_fifo_new();
return true;
}
static bool
null_encoder_write(Encoder *_encoder,
const void *data, size_t length,
gcc_unused Error &error)
{
NullEncoder *encoder = (NullEncoder *)_encoder;
growing_fifo_append(&encoder->buffer, data, length);
return length;
}
static size_t
null_encoder_read(Encoder *_encoder, void *dest, size_t length)
{
NullEncoder *encoder = (NullEncoder *)_encoder;
size_t max_length;
const void *src = fifo_buffer_read(encoder->buffer, &max_length);
if (src == nullptr)
return 0;
if (length > max_length)
length = max_length;
memcpy(dest, src, length);
fifo_buffer_consume(encoder->buffer, length);
return length;
}
const EncoderPlugin null_encoder_plugin = {
"null",
null_encoder_init,
null_encoder_finish,
null_encoder_open,
null_encoder_close,
nullptr,
nullptr,
nullptr,
nullptr,
null_encoder_write,
null_encoder_read,
nullptr,
};
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