output_*: convert to C++
This commit is contained in:
Max Kellermann
690
src/OutputThread.cxx
Normal file
690
src/OutputThread.cxx
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@@ -0,0 +1,690 @@
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/*
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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 "OutputThread.hxx"
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extern "C" {
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#include "output_api.h"
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#include "output_internal.h"
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#include "chunk.h"
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#include "pipe.h"
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#include "player_control.h"
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#include "pcm_mix.h"
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#include "filter_plugin.h"
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#include "filter/convert_filter_plugin.h"
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#include "filter/replay_gain_filter_plugin.h"
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#include "notify.h"
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}
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#include "mpd_error.h"
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#include "gcc.h"
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#include <glib.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <errno.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "output"
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static void ao_command_finished(struct audio_output *ao)
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{
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assert(ao->command != AO_COMMAND_NONE);
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ao->command = AO_COMMAND_NONE;
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g_mutex_unlock(ao->mutex);
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notify_signal(&audio_output_client_notify);
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g_mutex_lock(ao->mutex);
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}
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static bool
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ao_enable(struct audio_output *ao)
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{
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GError *error = NULL;
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bool success;
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if (ao->really_enabled)
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return true;
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g_mutex_unlock(ao->mutex);
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success = ao_plugin_enable(ao, &error);
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g_mutex_lock(ao->mutex);
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if (!success) {
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g_warning("Failed to enable \"%s\" [%s]: %s\n",
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ao->name, ao->plugin->name, error->message);
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g_error_free(error);
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return false;
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}
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ao->really_enabled = true;
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return true;
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}
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static void
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ao_close(struct audio_output *ao, bool drain);
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static void
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ao_disable(struct audio_output *ao)
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{
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if (ao->open)
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ao_close(ao, false);
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if (ao->really_enabled) {
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ao->really_enabled = false;
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g_mutex_unlock(ao->mutex);
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ao_plugin_disable(ao);
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g_mutex_lock(ao->mutex);
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}
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}
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static const struct audio_format *
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ao_filter_open(struct audio_output *ao,
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struct audio_format *audio_format,
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GError **error_r)
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{
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assert(audio_format_valid(audio_format));
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/* the replay_gain filter cannot fail here */
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if (ao->replay_gain_filter != NULL)
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filter_open(ao->replay_gain_filter, audio_format, error_r);
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if (ao->other_replay_gain_filter != NULL)
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filter_open(ao->other_replay_gain_filter, audio_format,
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error_r);
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const struct audio_format *af
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= filter_open(ao->filter, audio_format, error_r);
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if (af == NULL) {
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if (ao->replay_gain_filter != NULL)
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filter_close(ao->replay_gain_filter);
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if (ao->other_replay_gain_filter != NULL)
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filter_close(ao->other_replay_gain_filter);
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}
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return af;
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}
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static void
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ao_filter_close(struct audio_output *ao)
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{
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if (ao->replay_gain_filter != NULL)
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filter_close(ao->replay_gain_filter);
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if (ao->other_replay_gain_filter != NULL)
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filter_close(ao->other_replay_gain_filter);
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filter_close(ao->filter);
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}
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static void
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ao_open(struct audio_output *ao)
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{
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bool success;
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GError *error = NULL;
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const struct audio_format *filter_audio_format;
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struct audio_format_string af_string;
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assert(!ao->open);
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assert(ao->pipe != NULL);
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assert(ao->chunk == NULL);
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assert(audio_format_valid(&ao->in_audio_format));
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if (ao->fail_timer != NULL) {
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/* this can only happen when this
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output thread fails while
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audio_output_open() is run in the
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player thread */
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g_timer_destroy(ao->fail_timer);
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ao->fail_timer = NULL;
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}
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/* enable the device (just in case the last enable has failed) */
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if (!ao_enable(ao))
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/* still no luck */
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return;
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/* open the filter */
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filter_audio_format = ao_filter_open(ao, &ao->in_audio_format, &error);
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if (filter_audio_format == NULL) {
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g_warning("Failed to open filter for \"%s\" [%s]: %s",
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ao->name, ao->plugin->name, error->message);
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g_error_free(error);
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ao->fail_timer = g_timer_new();
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return;
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}
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assert(audio_format_valid(filter_audio_format));
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ao->out_audio_format = *filter_audio_format;
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audio_format_mask_apply(&ao->out_audio_format,
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&ao->config_audio_format);
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g_mutex_unlock(ao->mutex);
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success = ao_plugin_open(ao, &ao->out_audio_format, &error);
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g_mutex_lock(ao->mutex);
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assert(!ao->open);
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if (!success) {
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g_warning("Failed to open \"%s\" [%s]: %s",
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ao->name, ao->plugin->name, error->message);
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g_error_free(error);
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ao_filter_close(ao);
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ao->fail_timer = g_timer_new();
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return;
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}
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convert_filter_set(ao->convert_filter, &ao->out_audio_format);
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ao->open = true;
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g_debug("opened plugin=%s name=\"%s\" "
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"audio_format=%s",
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ao->plugin->name, ao->name,
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audio_format_to_string(&ao->out_audio_format, &af_string));
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if (!audio_format_equals(&ao->in_audio_format,
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&ao->out_audio_format))
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g_debug("converting from %s",
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audio_format_to_string(&ao->in_audio_format,
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&af_string));
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}
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static void
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ao_close(struct audio_output *ao, bool drain)
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{
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assert(ao->open);
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ao->pipe = NULL;
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ao->chunk = NULL;
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ao->open = false;
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g_mutex_unlock(ao->mutex);
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if (drain)
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ao_plugin_drain(ao);
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else
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ao_plugin_cancel(ao);
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ao_plugin_close(ao);
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ao_filter_close(ao);
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g_mutex_lock(ao->mutex);
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g_debug("closed plugin=%s name=\"%s\"", ao->plugin->name, ao->name);
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}
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static void
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ao_reopen_filter(struct audio_output *ao)
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{
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const struct audio_format *filter_audio_format;
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GError *error = NULL;
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ao_filter_close(ao);
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filter_audio_format = ao_filter_open(ao, &ao->in_audio_format, &error);
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if (filter_audio_format == NULL) {
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g_warning("Failed to open filter for \"%s\" [%s]: %s",
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ao->name, ao->plugin->name, error->message);
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g_error_free(error);
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/* this is a little code duplication fro ao_close(),
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but we cannot call this function because we must
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not call filter_close(ao->filter) again */
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ao->pipe = NULL;
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ao->chunk = NULL;
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ao->open = false;
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ao->fail_timer = g_timer_new();
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g_mutex_unlock(ao->mutex);
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ao_plugin_close(ao);
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g_mutex_lock(ao->mutex);
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return;
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}
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convert_filter_set(ao->convert_filter, &ao->out_audio_format);
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}
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static void
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ao_reopen(struct audio_output *ao)
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{
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if (!audio_format_fully_defined(&ao->config_audio_format)) {
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if (ao->open) {
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const struct music_pipe *mp = ao->pipe;
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ao_close(ao, true);
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ao->pipe = mp;
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}
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/* no audio format is configured: copy in->out, let
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the output's open() method determine the effective
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out_audio_format */
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ao->out_audio_format = ao->in_audio_format;
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audio_format_mask_apply(&ao->out_audio_format,
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&ao->config_audio_format);
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}
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if (ao->open)
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/* the audio format has changed, and all filters have
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to be reconfigured */
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ao_reopen_filter(ao);
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else
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ao_open(ao);
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}
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/**
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* Wait until the output's delay reaches zero.
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*
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* @return true if playback should be continued, false if a command
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* was issued
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*/
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static bool
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ao_wait(struct audio_output *ao)
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{
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while (true) {
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unsigned delay = ao_plugin_delay(ao);
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if (delay == 0)
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return true;
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GTimeVal tv;
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g_get_current_time(&tv);
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g_time_val_add(&tv, delay * 1000);
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(void)g_cond_timed_wait(ao->cond, ao->mutex, &tv);
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if (ao->command != AO_COMMAND_NONE)
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return false;
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}
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}
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static const void *
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ao_chunk_data(struct audio_output *ao, const struct music_chunk *chunk,
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struct filter *replay_gain_filter,
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unsigned *replay_gain_serial_p,
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size_t *length_r)
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{
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assert(chunk != NULL);
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assert(!music_chunk_is_empty(chunk));
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assert(music_chunk_check_format(chunk, &ao->in_audio_format));
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const void *data = chunk->data;
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size_t length = chunk->length;
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(void)ao;
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assert(length % audio_format_frame_size(&ao->in_audio_format) == 0);
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if (length > 0 && replay_gain_filter != NULL) {
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if (chunk->replay_gain_serial != *replay_gain_serial_p) {
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replay_gain_filter_set_info(replay_gain_filter,
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chunk->replay_gain_serial != 0
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? &chunk->replay_gain_info
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: NULL);
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*replay_gain_serial_p = chunk->replay_gain_serial;
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}
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GError *error = NULL;
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data = filter_filter(replay_gain_filter, data, length,
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&length, &error);
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if (data == NULL) {
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g_warning("\"%s\" [%s] failed to filter: %s",
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ao->name, ao->plugin->name, error->message);
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g_error_free(error);
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return NULL;
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}
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}
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*length_r = length;
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return data;
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}
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static const void *
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ao_filter_chunk(struct audio_output *ao, const struct music_chunk *chunk,
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size_t *length_r)
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{
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GError *error = NULL;
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size_t length;
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const void *data = ao_chunk_data(ao, chunk, ao->replay_gain_filter,
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&ao->replay_gain_serial, &length);
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if (data == NULL)
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return NULL;
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if (length == 0) {
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/* empty chunk, nothing to do */
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*length_r = 0;
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return data;
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}
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/* cross-fade */
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if (chunk->other != NULL) {
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size_t other_length;
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const void *other_data =
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ao_chunk_data(ao, chunk->other,
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ao->other_replay_gain_filter,
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&ao->other_replay_gain_serial,
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&other_length);
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if (other_data == NULL)
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return NULL;
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if (other_length == 0) {
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*length_r = 0;
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return data;
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}
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/* if the "other" chunk is longer, then that trailer
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is used as-is, without mixing; it is part of the
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"next" song being faded in, and if there's a rest,
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it means cross-fading ends here */
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if (length > other_length)
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length = other_length;
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void *dest = pcm_buffer_get(&ao->cross_fade_buffer,
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other_length);
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memcpy(dest, other_data, other_length);
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if (!pcm_mix(dest, data, length,
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sample_format(ao->in_audio_format.format),
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1.0 - chunk->mix_ratio)) {
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g_warning("Cannot cross-fade format %s",
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sample_format_to_string(sample_format(ao->in_audio_format.format)));
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return NULL;
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}
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data = dest;
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length = other_length;
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}
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/* apply filter chain */
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data = filter_filter(ao->filter, data, length, &length, &error);
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if (data == NULL) {
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g_warning("\"%s\" [%s] failed to filter: %s",
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ao->name, ao->plugin->name, error->message);
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g_error_free(error);
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return NULL;
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}
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*length_r = length;
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return data;
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}
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static bool
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ao_play_chunk(struct audio_output *ao, const struct music_chunk *chunk)
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{
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GError *error = NULL;
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assert(ao != NULL);
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assert(ao->filter != NULL);
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if (ao->tags && gcc_unlikely(chunk->tag != NULL)) {
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g_mutex_unlock(ao->mutex);
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ao_plugin_send_tag(ao, chunk->tag);
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g_mutex_lock(ao->mutex);
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}
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size_t size;
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#if GCC_CHECK_VERSION(4,7)
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/* workaround -Wmaybe-uninitialized false positive */
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size = 0;
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#endif
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const char *data = (const char *)ao_filter_chunk(ao, chunk, &size);
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if (data == NULL) {
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ao_close(ao, false);
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/* don't automatically reopen this device for 10
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seconds */
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ao->fail_timer = g_timer_new();
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return false;
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}
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while (size > 0 && ao->command == AO_COMMAND_NONE) {
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size_t nbytes;
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if (!ao_wait(ao))
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break;
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g_mutex_unlock(ao->mutex);
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nbytes = ao_plugin_play(ao, data, size, &error);
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g_mutex_lock(ao->mutex);
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if (nbytes == 0) {
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/* play()==0 means failure */
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g_warning("\"%s\" [%s] failed to play: %s",
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ao->name, ao->plugin->name, error->message);
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g_error_free(error);
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ao_close(ao, false);
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/* don't automatically reopen this device for
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10 seconds */
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assert(ao->fail_timer == NULL);
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ao->fail_timer = g_timer_new();
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return false;
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}
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assert(nbytes <= size);
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assert(nbytes % audio_format_frame_size(&ao->out_audio_format) == 0);
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data += nbytes;
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size -= nbytes;
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}
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return true;
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}
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static const struct music_chunk *
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ao_next_chunk(struct audio_output *ao)
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{
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return ao->chunk != NULL
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/* continue the previous play() call */
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? ao->chunk->next
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/* get the first chunk from the pipe */
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: music_pipe_peek(ao->pipe);
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}
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||||
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||||
/**
|
||||
* Plays all remaining chunks, until the tail of the pipe has been
|
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* reached (and no more chunks are queued), or until a command is
|
||||
* received.
|
||||
*
|
||||
* @return true if at least one chunk has been available, false if the
|
||||
* tail of the pipe was already reached
|
||||
*/
|
||||
static bool
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||||
ao_play(struct audio_output *ao)
|
||||
{
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||||
bool success;
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||||
const struct music_chunk *chunk;
|
||||
|
||||
assert(ao->pipe != NULL);
|
||||
|
||||
chunk = ao_next_chunk(ao);
|
||||
if (chunk == NULL)
|
||||
/* no chunk available */
|
||||
return false;
|
||||
|
||||
ao->chunk_finished = false;
|
||||
|
||||
while (chunk != NULL && ao->command == AO_COMMAND_NONE) {
|
||||
assert(!ao->chunk_finished);
|
||||
|
||||
ao->chunk = chunk;
|
||||
|
||||
success = ao_play_chunk(ao, chunk);
|
||||
if (!success) {
|
||||
assert(ao->chunk == NULL);
|
||||
break;
|
||||
}
|
||||
|
||||
assert(ao->chunk == chunk);
|
||||
chunk = chunk->next;
|
||||
}
|
||||
|
||||
ao->chunk_finished = true;
|
||||
|
||||
g_mutex_unlock(ao->mutex);
|
||||
player_lock_signal(ao->player_control);
|
||||
g_mutex_lock(ao->mutex);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static void ao_pause(struct audio_output *ao)
|
||||
{
|
||||
bool ret;
|
||||
|
||||
g_mutex_unlock(ao->mutex);
|
||||
ao_plugin_cancel(ao);
|
||||
g_mutex_lock(ao->mutex);
|
||||
|
||||
ao->pause = true;
|
||||
ao_command_finished(ao);
|
||||
|
||||
do {
|
||||
if (!ao_wait(ao))
|
||||
break;
|
||||
|
||||
g_mutex_unlock(ao->mutex);
|
||||
ret = ao_plugin_pause(ao);
|
||||
g_mutex_lock(ao->mutex);
|
||||
|
||||
if (!ret) {
|
||||
ao_close(ao, false);
|
||||
break;
|
||||
}
|
||||
} while (ao->command == AO_COMMAND_NONE);
|
||||
|
||||
ao->pause = false;
|
||||
}
|
||||
|
||||
static gpointer audio_output_task(gpointer arg)
|
||||
{
|
||||
struct audio_output *ao = (struct audio_output *)arg;
|
||||
|
||||
g_mutex_lock(ao->mutex);
|
||||
|
||||
while (1) {
|
||||
switch (ao->command) {
|
||||
case AO_COMMAND_NONE:
|
||||
break;
|
||||
|
||||
case AO_COMMAND_ENABLE:
|
||||
ao_enable(ao);
|
||||
ao_command_finished(ao);
|
||||
break;
|
||||
|
||||
case AO_COMMAND_DISABLE:
|
||||
ao_disable(ao);
|
||||
ao_command_finished(ao);
|
||||
break;
|
||||
|
||||
case AO_COMMAND_OPEN:
|
||||
ao_open(ao);
|
||||
ao_command_finished(ao);
|
||||
break;
|
||||
|
||||
case AO_COMMAND_REOPEN:
|
||||
ao_reopen(ao);
|
||||
ao_command_finished(ao);
|
||||
break;
|
||||
|
||||
case AO_COMMAND_CLOSE:
|
||||
assert(ao->open);
|
||||
assert(ao->pipe != NULL);
|
||||
|
||||
ao_close(ao, false);
|
||||
ao_command_finished(ao);
|
||||
break;
|
||||
|
||||
case AO_COMMAND_PAUSE:
|
||||
if (!ao->open) {
|
||||
/* the output has failed after
|
||||
audio_output_all_pause() has
|
||||
submitted the PAUSE command; bail
|
||||
out */
|
||||
ao_command_finished(ao);
|
||||
break;
|
||||
}
|
||||
|
||||
ao_pause(ao);
|
||||
/* don't "break" here: this might cause
|
||||
ao_play() to be called when command==CLOSE
|
||||
ends the paused state - "continue" checks
|
||||
the new command first */
|
||||
continue;
|
||||
|
||||
case AO_COMMAND_DRAIN:
|
||||
if (ao->open) {
|
||||
assert(ao->chunk == NULL);
|
||||
assert(music_pipe_peek(ao->pipe) == NULL);
|
||||
|
||||
g_mutex_unlock(ao->mutex);
|
||||
ao_plugin_drain(ao);
|
||||
g_mutex_lock(ao->mutex);
|
||||
}
|
||||
|
||||
ao_command_finished(ao);
|
||||
continue;
|
||||
|
||||
case AO_COMMAND_CANCEL:
|
||||
ao->chunk = NULL;
|
||||
|
||||
if (ao->open) {
|
||||
g_mutex_unlock(ao->mutex);
|
||||
ao_plugin_cancel(ao);
|
||||
g_mutex_lock(ao->mutex);
|
||||
}
|
||||
|
||||
ao_command_finished(ao);
|
||||
continue;
|
||||
|
||||
case AO_COMMAND_KILL:
|
||||
ao->chunk = NULL;
|
||||
ao_command_finished(ao);
|
||||
g_mutex_unlock(ao->mutex);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (ao->open && ao->allow_play && ao_play(ao))
|
||||
/* don't wait for an event if there are more
|
||||
chunks in the pipe */
|
||||
continue;
|
||||
|
||||
if (ao->command == AO_COMMAND_NONE)
|
||||
g_cond_wait(ao->cond, ao->mutex);
|
||||
}
|
||||
}
|
||||
|
||||
void audio_output_thread_start(struct audio_output *ao)
|
||||
{
|
||||
GError *e = NULL;
|
||||
|
||||
assert(ao->command == AO_COMMAND_NONE);
|
||||
|
||||
if (!(ao->thread = g_thread_create(audio_output_task, ao, true, &e)))
|
||||
MPD_ERROR("Failed to spawn output task: %s\n", e->message);
|
||||
}
|
||||
Reference in New Issue
Block a user