/* * Copyright (C) 2003-2011 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_thread.h" #include "decoder_control.h" #include "decoder_internal.h" #include "decoder_list.h" #include "decoder_plugin.h" #include "decoder_api.h" #include "replay_gain_ape.h" #include "input_stream.h" #include "pipe.h" #include "song.h" #include "tag.h" #include "mapper.h" #include "path.h" #include "uri.h" #include "mpd_error.h" #include <glib.h> #include <unistd.h> #include <stdio.h> /* for SEEK_SET */ #undef G_LOG_DOMAIN #define G_LOG_DOMAIN "decoder_thread" /** * Marks the current decoder command as "finished" and notifies the * player thread. * * @param dc the #decoder_control object; must be locked */ static void decoder_command_finished_locked(struct decoder_control *dc) { assert(dc->command != DECODE_COMMAND_NONE); dc->command = DECODE_COMMAND_NONE; g_cond_signal(dc->client_cond); } /** * Opens the input stream with input_stream_open(), and waits until * the stream gets ready. If a decoder STOP command is received * during that, it cancels the operation (but does not close the * stream). * * Unlock the decoder before calling this function. * * @return an input_stream on success or if #DECODE_COMMAND_STOP is * received, NULL on error */ static struct input_stream * decoder_input_stream_open(struct decoder_control *dc, const char *uri) { GError *error = NULL; struct input_stream *is; is = input_stream_open(uri, dc->mutex, dc->cond, &error); if (is == NULL) { if (error != NULL) { g_warning("%s", error->message); g_error_free(error); } return NULL; } /* wait for the input stream to become ready; its metadata will be available then */ decoder_lock(dc); input_stream_update(is); while (!is->ready && dc->command != DECODE_COMMAND_STOP) { decoder_wait(dc); input_stream_update(is); } if (!input_stream_check(is, &error)) { decoder_unlock(dc); g_warning("%s", error->message); g_error_free(error); return NULL; } decoder_unlock(dc); return is; } static bool decoder_stream_decode(const struct decoder_plugin *plugin, struct decoder *decoder, struct input_stream *input_stream) { assert(plugin != NULL); assert(plugin->stream_decode != NULL); assert(decoder != NULL); assert(decoder->stream_tag == NULL); assert(decoder->decoder_tag == NULL); assert(input_stream != NULL); assert(input_stream->ready); assert(decoder->dc->state == DECODE_STATE_START); if (decoder->dc->command == DECODE_COMMAND_STOP) return true; /* rewind the stream, so each plugin gets a fresh start */ input_stream_seek(input_stream, 0, SEEK_SET, NULL); decoder_unlock(decoder->dc); decoder_plugin_stream_decode(plugin, decoder, input_stream); decoder_lock(decoder->dc); assert(decoder->dc->state == DECODE_STATE_START || decoder->dc->state == DECODE_STATE_DECODE); return decoder->dc->state != DECODE_STATE_START; } static bool decoder_file_decode(const struct decoder_plugin *plugin, struct decoder *decoder, const char *path) { assert(plugin != NULL); assert(plugin->file_decode != NULL); assert(decoder != NULL); assert(decoder->stream_tag == NULL); assert(decoder->decoder_tag == NULL); assert(path != NULL); assert(g_path_is_absolute(path)); assert(decoder->dc->state == DECODE_STATE_START); if (decoder->dc->command == DECODE_COMMAND_STOP) return true; decoder_unlock(decoder->dc); decoder_plugin_file_decode(plugin, decoder, path); decoder_lock(decoder->dc); assert(decoder->dc->state == DECODE_STATE_START || decoder->dc->state == DECODE_STATE_DECODE); return decoder->dc->state != DECODE_STATE_START; } /** * Hack to allow tracking const decoder plugins in a GSList. */ static inline gpointer deconst_plugin(const struct decoder_plugin *plugin) { union { const struct decoder_plugin *in; gpointer out; } u = { .in = plugin }; return u.out; } /** * Try decoding a stream, using plugins matching the stream's MIME type. * * @param tried_r a list of plugins which were tried */ static bool decoder_run_stream_mime_type(struct decoder *decoder, struct input_stream *is, GSList **tried_r) { assert(tried_r != NULL); const struct decoder_plugin *plugin; unsigned int next = 0; if (is->mime == NULL) return false; while ((plugin = decoder_plugin_from_mime_type(is->mime, next++))) { if (plugin->stream_decode == NULL) continue; if (g_slist_find(*tried_r, plugin) != NULL) /* don't try a plugin twice */ continue; if (decoder_stream_decode(plugin, decoder, is)) return true; *tried_r = g_slist_prepend(*tried_r, deconst_plugin(plugin)); } return false; } /** * Try decoding a stream, using plugins matching the stream's URI * suffix. * * @param tried_r a list of plugins which were tried */ static bool decoder_run_stream_suffix(struct decoder *decoder, struct input_stream *is, const char *uri, GSList **tried_r) { assert(tried_r != NULL); const char *suffix = uri_get_suffix(uri); const struct decoder_plugin *plugin = NULL; if (suffix == NULL) return false; while ((plugin = decoder_plugin_from_suffix(suffix, plugin)) != NULL) { if (plugin->stream_decode == NULL) continue; if (g_slist_find(*tried_r, plugin) != NULL) /* don't try a plugin twice */ continue; if (decoder_stream_decode(plugin, decoder, is)) return true; *tried_r = g_slist_prepend(*tried_r, deconst_plugin(plugin)); } return false; } /** * Try decoding a stream, using the fallback plugin. */ static bool decoder_run_stream_fallback(struct decoder *decoder, struct input_stream *is) { const struct decoder_plugin *plugin; plugin = decoder_plugin_from_name("mad"); return plugin != NULL && plugin->stream_decode != NULL && decoder_stream_decode(plugin, decoder, is); } /** * Try decoding a stream. */ static bool decoder_run_stream(struct decoder *decoder, const char *uri) { struct decoder_control *dc = decoder->dc; struct input_stream *input_stream; bool success; decoder_unlock(dc); input_stream = decoder_input_stream_open(dc, uri); if (input_stream == NULL) { decoder_lock(dc); return false; } decoder_lock(dc); GSList *tried = NULL; success = dc->command == DECODE_COMMAND_STOP || /* first we try mime types: */ decoder_run_stream_mime_type(decoder, input_stream, &tried) || /* if that fails, try suffix matching the URL: */ decoder_run_stream_suffix(decoder, input_stream, uri, &tried) || /* fallback to mp3: this is needed for bastard streams that don't have a suffix or set the mimeType */ (tried == NULL && decoder_run_stream_fallback(decoder, input_stream)); g_slist_free(tried); decoder_unlock(dc); input_stream_close(input_stream); decoder_lock(dc); return success; } /** * Attempt to load replay gain data, and pass it to * decoder_replay_gain(). */ static void decoder_load_replay_gain(struct decoder *decoder, const char *path_fs) { struct replay_gain_info info; if (replay_gain_ape_read(path_fs, &info)) decoder_replay_gain(decoder, &info); } /** * Try decoding a file. */ static bool decoder_run_file(struct decoder *decoder, const char *path_fs) { struct decoder_control *dc = decoder->dc; const char *suffix = uri_get_suffix(path_fs); const struct decoder_plugin *plugin = NULL; if (suffix == NULL) return false; decoder_unlock(dc); decoder_load_replay_gain(decoder, path_fs); while ((plugin = decoder_plugin_from_suffix(suffix, plugin)) != NULL) { if (plugin->file_decode != NULL) { decoder_lock(dc); if (decoder_file_decode(plugin, decoder, path_fs)) return true; decoder_unlock(dc); } else if (plugin->stream_decode != NULL) { struct input_stream *input_stream; bool success; input_stream = decoder_input_stream_open(dc, path_fs); if (input_stream == NULL) continue; decoder_lock(dc); success = decoder_stream_decode(plugin, decoder, input_stream); decoder_unlock(dc); input_stream_close(input_stream); if (success) { decoder_lock(dc); return true; } } } decoder_lock(dc); return false; } static void decoder_run_song(struct decoder_control *dc, const struct song *song, const char *uri) { struct decoder decoder = { .dc = dc, .initial_seek_pending = dc->start_ms > 0, .initial_seek_running = false, }; int ret; decoder.timestamp = 0.0; decoder.seeking = false; decoder.song_tag = song->tag != NULL && song_is_file(song) ? tag_dup(song->tag) : NULL; decoder.stream_tag = NULL; decoder.decoder_tag = NULL; decoder.chunk = NULL; dc->state = DECODE_STATE_START; decoder_command_finished_locked(dc); pcm_convert_init(&decoder.conv_state); ret = song_is_file(song) ? decoder_run_file(&decoder, uri) : decoder_run_stream(&decoder, uri); decoder_unlock(dc); pcm_convert_deinit(&decoder.conv_state); /* flush the last chunk */ if (decoder.chunk != NULL) decoder_flush_chunk(&decoder); if (decoder.song_tag != NULL) tag_free(decoder.song_tag); if (decoder.stream_tag != NULL) tag_free(decoder.stream_tag); if (decoder.decoder_tag != NULL) tag_free(decoder.decoder_tag); decoder_lock(dc); dc->state = ret ? DECODE_STATE_STOP : DECODE_STATE_ERROR; } static void decoder_run(struct decoder_control *dc) { const struct song *song = dc->song; char *uri; assert(song != NULL); if (song_is_file(song)) uri = map_song_fs(song); else uri = song_get_uri(song); if (uri == NULL) { dc->state = DECODE_STATE_ERROR; decoder_command_finished_locked(dc); return; } decoder_run_song(dc, song, uri); g_free(uri); } static gpointer decoder_task(gpointer arg) { struct decoder_control *dc = arg; decoder_lock(dc); do { assert(dc->state == DECODE_STATE_STOP || dc->state == DECODE_STATE_ERROR); switch (dc->command) { case DECODE_COMMAND_START: g_debug("clearing mixramp tags"); dc_mixramp_start(dc, NULL); dc_mixramp_prev_end(dc, dc->mixramp_end); dc->mixramp_end = NULL; /* Don't free, it's copied above. */ dc->replay_gain_prev_db = dc->replay_gain_db; dc->replay_gain_db = 0; /* fall through */ case DECODE_COMMAND_SEEK: decoder_run(dc); break; case DECODE_COMMAND_STOP: decoder_command_finished_locked(dc); break; case DECODE_COMMAND_NONE: decoder_wait(dc); break; } } while (dc->command != DECODE_COMMAND_NONE || !dc->quit); decoder_unlock(dc); return NULL; } void decoder_thread_start(struct decoder_control *dc) { GError *e = NULL; assert(dc->thread == NULL); dc->quit = false; dc->thread = g_thread_create(decoder_task, dc, true, &e); if (dc->thread == NULL) MPD_ERROR("Failed to spawn decoder task: %s", e->message); }