/* * Copyright (C) 2003-2009 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 "decoder_internal.h" #include "decoder_control.h" #include "player_control.h" #include "pipe.h" #include "input_stream.h" #include "buffer.h" #include "chunk.h" #include <assert.h> /** * This is a wrapper for input_stream_buffer(). It assumes that the * decoder is currently locked, and temporarily unlocks it while * calling input_stream_buffer(). We shouldn't hold the lock during a * potentially blocking operation. */ static bool decoder_input_buffer(struct decoder_control *dc, struct input_stream *is) { GError *error = NULL; int ret; decoder_unlock(dc); ret = input_stream_buffer(is, &error); if (ret < 0) { g_warning("%s", error->message); g_error_free(error); } decoder_lock(dc); return ret > 0; } /** * All chunks are full of decoded data; wait for the player to free * one. */ static enum decoder_command need_chunks(struct decoder_control *dc, struct input_stream *is, bool do_wait) { if (dc->command == DECODE_COMMAND_STOP || dc->command == DECODE_COMMAND_SEEK) return dc->command; if ((is == NULL || !decoder_input_buffer(dc, is)) && do_wait) { decoder_wait(dc); player_signal(); return dc->command; } return DECODE_COMMAND_NONE; } struct music_chunk * decoder_get_chunk(struct decoder *decoder, struct input_stream *is) { struct decoder_control *dc = decoder->dc; enum decoder_command cmd; assert(decoder != NULL); if (decoder->chunk != NULL) return decoder->chunk; do { decoder->chunk = music_buffer_allocate(dc->buffer); if (decoder->chunk != NULL) return decoder->chunk; decoder_lock(dc); cmd = need_chunks(dc, is, true); decoder_unlock(dc); } while (cmd == DECODE_COMMAND_NONE); return NULL; } void decoder_flush_chunk(struct decoder *decoder) { struct decoder_control *dc = decoder->dc; assert(decoder != NULL); assert(decoder->chunk != NULL); if (music_chunk_is_empty(decoder->chunk)) music_buffer_return(dc->buffer, decoder->chunk); else music_pipe_push(dc->pipe, decoder->chunk); decoder->chunk = NULL; }