118 lines
2.6 KiB
C++
118 lines
2.6 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "NullEncoderPlugin.hxx"
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#include "EncoderAPI.hxx"
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#include "util/fifo_buffer.h"
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extern "C" {
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#include "util/growing_fifo.h"
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}
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#include "gcc.h"
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#include <assert.h>
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#include <string.h>
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struct NullEncoder final {
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Encoder encoder;
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struct fifo_buffer *buffer;
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NullEncoder():encoder(null_encoder_plugin) {}
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};
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static Encoder *
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null_encoder_init(gcc_unused const config_param ¶m,
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gcc_unused Error &error)
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{
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NullEncoder *encoder = new NullEncoder();
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return &encoder->encoder;
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}
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static void
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null_encoder_finish(Encoder *_encoder)
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{
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NullEncoder *encoder = (NullEncoder *)_encoder;
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delete encoder;
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}
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static void
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null_encoder_close(Encoder *_encoder)
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{
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NullEncoder *encoder = (NullEncoder *)_encoder;
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fifo_buffer_free(encoder->buffer);
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}
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static bool
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null_encoder_open(Encoder *_encoder,
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gcc_unused AudioFormat &audio_format,
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gcc_unused Error &error)
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{
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NullEncoder *encoder = (NullEncoder *)_encoder;
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encoder->buffer = growing_fifo_new();
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return true;
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}
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static bool
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null_encoder_write(Encoder *_encoder,
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const void *data, size_t length,
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gcc_unused Error &error)
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{
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NullEncoder *encoder = (NullEncoder *)_encoder;
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growing_fifo_append(&encoder->buffer, data, length);
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return length;
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}
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static size_t
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null_encoder_read(Encoder *_encoder, void *dest, size_t length)
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{
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NullEncoder *encoder = (NullEncoder *)_encoder;
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size_t max_length;
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const void *src = fifo_buffer_read(encoder->buffer, &max_length);
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if (src == nullptr)
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return 0;
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if (length > max_length)
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length = max_length;
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memcpy(dest, src, length);
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fifo_buffer_consume(encoder->buffer, length);
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return length;
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}
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const EncoderPlugin null_encoder_plugin = {
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"null",
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null_encoder_init,
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null_encoder_finish,
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null_encoder_open,
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null_encoder_close,
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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null_encoder_write,
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null_encoder_read,
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nullptr,
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};
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