/* * Copyright (C) 2003-2010 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 "encoder_api.h" #include "encoder_plugin.h" #include "fifo_buffer.h" #include "growing_fifo.h" #include <assert.h> #include <string.h> struct null_encoder { struct encoder encoder; struct fifo_buffer *buffer; }; extern const struct encoder_plugin null_encoder_plugin; static inline GQuark null_encoder_quark(void) { return g_quark_from_static_string("null_encoder"); } static struct encoder * null_encoder_init(G_GNUC_UNUSED const struct config_param *param, G_GNUC_UNUSED GError **error) { struct null_encoder *encoder; encoder = g_new(struct null_encoder, 1); encoder_struct_init(&encoder->encoder, &null_encoder_plugin); return &encoder->encoder; } static void null_encoder_finish(struct encoder *_encoder) { struct null_encoder *encoder = (struct null_encoder *)_encoder; g_free(encoder); } static void null_encoder_close(struct encoder *_encoder) { struct null_encoder *encoder = (struct null_encoder *)_encoder; fifo_buffer_free(encoder->buffer); } static bool null_encoder_open(struct encoder *_encoder, G_GNUC_UNUSED struct audio_format *audio_format, G_GNUC_UNUSED GError **error) { struct null_encoder *encoder = (struct null_encoder *)_encoder; encoder->buffer = growing_fifo_new(); return true; } static bool null_encoder_write(struct encoder *_encoder, const void *data, size_t length, G_GNUC_UNUSED GError **error) { struct null_encoder *encoder = (struct null_encoder *)_encoder; growing_fifo_append(&encoder->buffer, data, length); return length; } static size_t null_encoder_read(struct encoder *_encoder, void *dest, size_t length) { struct null_encoder *encoder = (struct null_encoder *)_encoder; size_t max_length; const void *src = fifo_buffer_read(encoder->buffer, &max_length); if (src == NULL) return 0; if (length > max_length) length = max_length; memcpy(dest, src, length); fifo_buffer_consume(encoder->buffer, length); return length; } const struct encoder_plugin null_encoder_plugin = { .name = "null", .init = null_encoder_init, .finish = null_encoder_finish, .open = null_encoder_open, .close = null_encoder_close, .write = null_encoder_write, .read = null_encoder_read, };