output/*: move to output/plugins/
This commit is contained in:
Max Kellermann
@@ -0,0 +1,765 @@
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/*
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* Copyright (C) 2003-2014 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 "JackOutputPlugin.hxx"
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#include "../OutputAPI.hxx"
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#include "ConfigError.hxx"
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#include "util/Error.hxx"
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#include "util/Domain.hxx"
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#include "Log.hxx"
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#include <assert.h>
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#include <glib.h>
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#include <jack/jack.h>
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#include <jack/types.h>
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#include <jack/ringbuffer.h>
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#include <stdlib.h>
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#include <string.h>
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enum {
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MAX_PORTS = 16,
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};
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static const size_t jack_sample_size = sizeof(jack_default_audio_sample_t);
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struct JackOutput {
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struct audio_output base;
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/**
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* libjack options passed to jack_client_open().
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*/
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jack_options_t options;
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const char *name;
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const char *server_name;
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/* configuration */
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char *source_ports[MAX_PORTS];
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unsigned num_source_ports;
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char *destination_ports[MAX_PORTS];
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unsigned num_destination_ports;
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size_t ringbuffer_size;
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/* the current audio format */
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AudioFormat audio_format;
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/* jack library stuff */
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jack_port_t *ports[MAX_PORTS];
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jack_client_t *client;
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jack_ringbuffer_t *ringbuffer[MAX_PORTS];
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bool shutdown;
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/**
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* While this flag is set, the "process" callback generates
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* silence.
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*/
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bool pause;
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bool Initialize(const config_param ¶m, Error &error_r) {
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return ao_base_init(&base, &jack_output_plugin, param,
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error_r);
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}
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void Deinitialize() {
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ao_base_finish(&base);
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}
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};
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static constexpr Domain jack_output_domain("jack_output");
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/**
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* Determine the number of frames guaranteed to be available on all
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* channels.
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*/
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static jack_nframes_t
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mpd_jack_available(const JackOutput *jd)
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{
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size_t min = jack_ringbuffer_read_space(jd->ringbuffer[0]);
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for (unsigned i = 1; i < jd->audio_format.channels; ++i) {
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size_t current = jack_ringbuffer_read_space(jd->ringbuffer[i]);
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if (current < min)
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min = current;
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}
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assert(min % jack_sample_size == 0);
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return min / jack_sample_size;
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}
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static int
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mpd_jack_process(jack_nframes_t nframes, void *arg)
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{
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JackOutput *jd = (JackOutput *) arg;
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if (nframes <= 0)
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return 0;
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if (jd->pause) {
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/* empty the ring buffers */
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const jack_nframes_t available = mpd_jack_available(jd);
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for (unsigned i = 0; i < jd->audio_format.channels; ++i)
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jack_ringbuffer_read_advance(jd->ringbuffer[i],
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available * jack_sample_size);
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/* generate silence while MPD is paused */
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for (unsigned i = 0; i < jd->audio_format.channels; ++i) {
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jack_default_audio_sample_t *out =
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(jack_default_audio_sample_t *)
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jack_port_get_buffer(jd->ports[i], nframes);
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for (jack_nframes_t f = 0; f < nframes; ++f)
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out[f] = 0.0;
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}
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return 0;
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}
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jack_nframes_t available = mpd_jack_available(jd);
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if (available > nframes)
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available = nframes;
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for (unsigned i = 0; i < jd->audio_format.channels; ++i) {
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jack_default_audio_sample_t *out =
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(jack_default_audio_sample_t *)
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jack_port_get_buffer(jd->ports[i], nframes);
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if (out == nullptr)
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/* workaround for libjack1 bug: if the server
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connection fails, the process callback is
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invoked anyway, but unable to get a
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buffer */
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continue;
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jack_ringbuffer_read(jd->ringbuffer[i],
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(char *)out, available * jack_sample_size);
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for (jack_nframes_t f = available; f < nframes; ++f)
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/* ringbuffer underrun, fill with silence */
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out[f] = 0.0;
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}
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/* generate silence for the unused source ports */
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for (unsigned i = jd->audio_format.channels;
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i < jd->num_source_ports; ++i) {
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jack_default_audio_sample_t *out =
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(jack_default_audio_sample_t *)
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jack_port_get_buffer(jd->ports[i], nframes);
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if (out == nullptr)
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/* workaround for libjack1 bug: if the server
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connection fails, the process callback is
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invoked anyway, but unable to get a
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buffer */
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continue;
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for (jack_nframes_t f = 0; f < nframes; ++f)
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out[f] = 0.0;
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}
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return 0;
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}
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static void
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mpd_jack_shutdown(void *arg)
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{
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JackOutput *jd = (JackOutput *) arg;
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jd->shutdown = true;
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}
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static void
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set_audioformat(JackOutput *jd, AudioFormat &audio_format)
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{
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audio_format.sample_rate = jack_get_sample_rate(jd->client);
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if (jd->num_source_ports == 1)
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audio_format.channels = 1;
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else if (audio_format.channels > jd->num_source_ports)
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audio_format.channels = 2;
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if (audio_format.format != SampleFormat::S16 &&
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audio_format.format != SampleFormat::S24_P32)
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audio_format.format = SampleFormat::S24_P32;
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}
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static void
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mpd_jack_error(const char *msg)
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{
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LogError(jack_output_domain, msg);
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}
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#ifdef HAVE_JACK_SET_INFO_FUNCTION
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static void
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mpd_jack_info(const char *msg)
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{
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LogDefault(jack_output_domain, msg);
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}
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#endif
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/**
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* Disconnect the JACK client.
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*/
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static void
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mpd_jack_disconnect(JackOutput *jd)
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{
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assert(jd != nullptr);
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assert(jd->client != nullptr);
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jack_deactivate(jd->client);
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jack_client_close(jd->client);
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jd->client = nullptr;
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}
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/**
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* Connect the JACK client and performs some basic setup
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* (e.g. register callbacks).
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*/
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static bool
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mpd_jack_connect(JackOutput *jd, Error &error)
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{
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jack_status_t status;
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assert(jd != nullptr);
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jd->shutdown = false;
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jd->client = jack_client_open(jd->name, jd->options, &status,
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jd->server_name);
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if (jd->client == nullptr) {
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error.Format(jack_output_domain, status,
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"Failed to connect to JACK server, status=%d",
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status);
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return false;
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}
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jack_set_process_callback(jd->client, mpd_jack_process, jd);
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jack_on_shutdown(jd->client, mpd_jack_shutdown, jd);
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for (unsigned i = 0; i < jd->num_source_ports; ++i) {
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jd->ports[i] = jack_port_register(jd->client,
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jd->source_ports[i],
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JACK_DEFAULT_AUDIO_TYPE,
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JackPortIsOutput, 0);
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if (jd->ports[i] == nullptr) {
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error.Format(jack_output_domain,
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"Cannot register output port \"%s\"",
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jd->source_ports[i]);
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mpd_jack_disconnect(jd);
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return false;
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}
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}
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return true;
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}
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static bool
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mpd_jack_test_default_device(void)
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{
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return true;
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}
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static unsigned
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parse_port_list(const char *source, char **dest, Error &error)
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{
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char **list = g_strsplit(source, ",", 0);
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unsigned n = 0;
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for (n = 0; list[n] != nullptr; ++n) {
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if (n >= MAX_PORTS) {
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error.Set(config_domain,
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"too many port names");
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return 0;
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}
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dest[n] = list[n];
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}
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g_free(list);
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if (n == 0) {
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error.Format(config_domain,
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"at least one port name expected");
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return 0;
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}
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return n;
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}
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static struct audio_output *
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mpd_jack_init(const config_param ¶m, Error &error)
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{
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JackOutput *jd = new JackOutput();
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if (!jd->Initialize(param, error)) {
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delete jd;
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return nullptr;
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}
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const char *value;
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jd->options = JackNullOption;
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jd->name = param.GetBlockValue("client_name", nullptr);
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if (jd->name != nullptr)
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jd->options = jack_options_t(jd->options | JackUseExactName);
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else
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/* if there's a no configured client name, we don't
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care about the JackUseExactName option */
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jd->name = "Music Player Daemon";
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jd->server_name = param.GetBlockValue("server_name", nullptr);
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if (jd->server_name != nullptr)
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jd->options = jack_options_t(jd->options | JackServerName);
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if (!param.GetBlockValue("autostart", false))
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jd->options = jack_options_t(jd->options | JackNoStartServer);
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/* configure the source ports */
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value = param.GetBlockValue("source_ports", "left,right");
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jd->num_source_ports = parse_port_list(value,
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jd->source_ports, error);
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if (jd->num_source_ports == 0)
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return nullptr;
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/* configure the destination ports */
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value = param.GetBlockValue("destination_ports", nullptr);
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if (value == nullptr) {
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/* compatibility with MPD < 0.16 */
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value = param.GetBlockValue("ports", nullptr);
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if (value != nullptr)
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FormatWarning(jack_output_domain,
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"deprecated option 'ports' in line %d",
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param.line);
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}
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if (value != nullptr) {
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jd->num_destination_ports =
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parse_port_list(value,
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jd->destination_ports, error);
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if (jd->num_destination_ports == 0)
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return nullptr;
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} else {
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jd->num_destination_ports = 0;
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}
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if (jd->num_destination_ports > 0 &&
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jd->num_destination_ports != jd->num_source_ports)
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FormatWarning(jack_output_domain,
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"number of source ports (%u) mismatches the "
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"number of destination ports (%u) in line %d",
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jd->num_source_ports, jd->num_destination_ports,
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param.line);
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jd->ringbuffer_size = param.GetBlockValue("ringbuffer_size", 32768u);
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jack_set_error_function(mpd_jack_error);
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#ifdef HAVE_JACK_SET_INFO_FUNCTION
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jack_set_info_function(mpd_jack_info);
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#endif
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return &jd->base;
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}
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static void
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mpd_jack_finish(struct audio_output *ao)
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{
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JackOutput *jd = (JackOutput *)ao;
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for (unsigned i = 0; i < jd->num_source_ports; ++i)
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g_free(jd->source_ports[i]);
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for (unsigned i = 0; i < jd->num_destination_ports; ++i)
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g_free(jd->destination_ports[i]);
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jd->Deinitialize();
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delete jd;
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}
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static bool
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mpd_jack_enable(struct audio_output *ao, Error &error)
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{
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JackOutput *jd = (JackOutput *)ao;
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for (unsigned i = 0; i < jd->num_source_ports; ++i)
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jd->ringbuffer[i] = nullptr;
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return mpd_jack_connect(jd, error);
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}
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static void
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mpd_jack_disable(struct audio_output *ao)
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{
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JackOutput *jd = (JackOutput *)ao;
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if (jd->client != nullptr)
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mpd_jack_disconnect(jd);
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for (unsigned i = 0; i < jd->num_source_ports; ++i) {
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if (jd->ringbuffer[i] != nullptr) {
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jack_ringbuffer_free(jd->ringbuffer[i]);
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jd->ringbuffer[i] = nullptr;
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}
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}
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}
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/**
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* Stops the playback on the JACK connection.
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*/
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static void
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mpd_jack_stop(JackOutput *jd)
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{
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assert(jd != nullptr);
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if (jd->client == nullptr)
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return;
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if (jd->shutdown)
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/* the connection has failed; close it */
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mpd_jack_disconnect(jd);
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else
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/* the connection is alive: just stop playback */
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jack_deactivate(jd->client);
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}
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static bool
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mpd_jack_start(JackOutput *jd, Error &error)
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{
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const char *destination_ports[MAX_PORTS], **jports;
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const char *duplicate_port = nullptr;
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unsigned num_destination_ports;
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assert(jd->client != nullptr);
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assert(jd->audio_format.channels <= jd->num_source_ports);
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/* allocate the ring buffers on the first open(); these
|
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persist until MPD exits. It's too unsafe to delete them
|
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because we can never know when mpd_jack_process() gets
|
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called */
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for (unsigned i = 0; i < jd->num_source_ports; ++i) {
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if (jd->ringbuffer[i] == nullptr)
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jd->ringbuffer[i] =
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jack_ringbuffer_create(jd->ringbuffer_size);
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/* clear the ring buffer to be sure that data from
|
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previous playbacks are gone */
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jack_ringbuffer_reset(jd->ringbuffer[i]);
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}
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if ( jack_activate(jd->client) ) {
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error.Set(jack_output_domain, "cannot activate client");
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mpd_jack_stop(jd);
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return false;
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}
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|
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if (jd->num_destination_ports == 0) {
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/* no output ports were configured - ask libjack for
|
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defaults */
|
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jports = jack_get_ports(jd->client, nullptr, nullptr,
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JackPortIsPhysical | JackPortIsInput);
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if (jports == nullptr) {
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error.Set(jack_output_domain, "no ports found");
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mpd_jack_stop(jd);
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return false;
|
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}
|
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|
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assert(*jports != nullptr);
|
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|
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for (num_destination_ports = 0;
|
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num_destination_ports < MAX_PORTS &&
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jports[num_destination_ports] != nullptr;
|
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++num_destination_ports) {
|
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FormatDebug(jack_output_domain,
|
||||
"destination_port[%u] = '%s'\n",
|
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num_destination_ports,
|
||||
jports[num_destination_ports]);
|
||||
destination_ports[num_destination_ports] =
|
||||
jports[num_destination_ports];
|
||||
}
|
||||
} else {
|
||||
/* use the configured output ports */
|
||||
|
||||
num_destination_ports = jd->num_destination_ports;
|
||||
memcpy(destination_ports, jd->destination_ports,
|
||||
num_destination_ports * sizeof(*destination_ports));
|
||||
|
||||
jports = nullptr;
|
||||
}
|
||||
|
||||
assert(num_destination_ports > 0);
|
||||
|
||||
if (jd->audio_format.channels >= 2 && num_destination_ports == 1) {
|
||||
/* mix stereo signal on one speaker */
|
||||
|
||||
while (num_destination_ports < jd->audio_format.channels)
|
||||
destination_ports[num_destination_ports++] =
|
||||
destination_ports[0];
|
||||
} else if (num_destination_ports > jd->audio_format.channels) {
|
||||
if (jd->audio_format.channels == 1 && num_destination_ports > 2) {
|
||||
/* mono input file: connect the one source
|
||||
channel to the both destination channels */
|
||||
duplicate_port = destination_ports[1];
|
||||
num_destination_ports = 1;
|
||||
} else
|
||||
/* connect only as many ports as we need */
|
||||
num_destination_ports = jd->audio_format.channels;
|
||||
}
|
||||
|
||||
assert(num_destination_ports <= jd->num_source_ports);
|
||||
|
||||
for (unsigned i = 0; i < num_destination_ports; ++i) {
|
||||
int ret;
|
||||
|
||||
ret = jack_connect(jd->client, jack_port_name(jd->ports[i]),
|
||||
destination_ports[i]);
|
||||
if (ret != 0) {
|
||||
error.Format(jack_output_domain,
|
||||
"Not a valid JACK port: %s",
|
||||
destination_ports[i]);
|
||||
|
||||
if (jports != nullptr)
|
||||
free(jports);
|
||||
|
||||
mpd_jack_stop(jd);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
if (duplicate_port != nullptr) {
|
||||
/* mono input file: connect the one source channel to
|
||||
the both destination channels */
|
||||
int ret;
|
||||
|
||||
ret = jack_connect(jd->client, jack_port_name(jd->ports[0]),
|
||||
duplicate_port);
|
||||
if (ret != 0) {
|
||||
error.Format(jack_output_domain,
|
||||
"Not a valid JACK port: %s",
|
||||
duplicate_port);
|
||||
|
||||
if (jports != nullptr)
|
||||
free(jports);
|
||||
|
||||
mpd_jack_stop(jd);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
if (jports != nullptr)
|
||||
free(jports);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool
|
||||
mpd_jack_open(struct audio_output *ao, AudioFormat &audio_format,
|
||||
Error &error)
|
||||
{
|
||||
JackOutput *jd = (JackOutput *)ao;
|
||||
|
||||
assert(jd != nullptr);
|
||||
|
||||
jd->pause = false;
|
||||
|
||||
if (jd->client != nullptr && jd->shutdown)
|
||||
mpd_jack_disconnect(jd);
|
||||
|
||||
if (jd->client == nullptr && !mpd_jack_connect(jd, error))
|
||||
return false;
|
||||
|
||||
set_audioformat(jd, audio_format);
|
||||
jd->audio_format = audio_format;
|
||||
|
||||
if (!mpd_jack_start(jd, error))
|
||||
return false;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static void
|
||||
mpd_jack_close(gcc_unused struct audio_output *ao)
|
||||
{
|
||||
JackOutput *jd = (JackOutput *)ao;
|
||||
|
||||
mpd_jack_stop(jd);
|
||||
}
|
||||
|
||||
static unsigned
|
||||
mpd_jack_delay(struct audio_output *ao)
|
||||
{
|
||||
JackOutput *jd = (JackOutput *)ao;
|
||||
|
||||
return jd->base.pause && jd->pause && !jd->shutdown
|
||||
? 1000
|
||||
: 0;
|
||||
}
|
||||
|
||||
static inline jack_default_audio_sample_t
|
||||
sample_16_to_jack(int16_t sample)
|
||||
{
|
||||
return sample / (jack_default_audio_sample_t)(1 << (16 - 1));
|
||||
}
|
||||
|
||||
static void
|
||||
mpd_jack_write_samples_16(JackOutput *jd, const int16_t *src,
|
||||
unsigned num_samples)
|
||||
{
|
||||
jack_default_audio_sample_t sample;
|
||||
unsigned i;
|
||||
|
||||
while (num_samples-- > 0) {
|
||||
for (i = 0; i < jd->audio_format.channels; ++i) {
|
||||
sample = sample_16_to_jack(*src++);
|
||||
jack_ringbuffer_write(jd->ringbuffer[i],
|
||||
(const char *)&sample,
|
||||
sizeof(sample));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static inline jack_default_audio_sample_t
|
||||
sample_24_to_jack(int32_t sample)
|
||||
{
|
||||
return sample / (jack_default_audio_sample_t)(1 << (24 - 1));
|
||||
}
|
||||
|
||||
static void
|
||||
mpd_jack_write_samples_24(JackOutput *jd, const int32_t *src,
|
||||
unsigned num_samples)
|
||||
{
|
||||
jack_default_audio_sample_t sample;
|
||||
unsigned i;
|
||||
|
||||
while (num_samples-- > 0) {
|
||||
for (i = 0; i < jd->audio_format.channels; ++i) {
|
||||
sample = sample_24_to_jack(*src++);
|
||||
jack_ringbuffer_write(jd->ringbuffer[i],
|
||||
(const char *)&sample,
|
||||
sizeof(sample));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
mpd_jack_write_samples(JackOutput *jd, const void *src,
|
||||
unsigned num_samples)
|
||||
{
|
||||
switch (jd->audio_format.format) {
|
||||
case SampleFormat::S16:
|
||||
mpd_jack_write_samples_16(jd, (const int16_t*)src,
|
||||
num_samples);
|
||||
break;
|
||||
|
||||
case SampleFormat::S24_P32:
|
||||
mpd_jack_write_samples_24(jd, (const int32_t*)src,
|
||||
num_samples);
|
||||
break;
|
||||
|
||||
default:
|
||||
assert(false);
|
||||
gcc_unreachable();
|
||||
}
|
||||
}
|
||||
|
||||
static size_t
|
||||
mpd_jack_play(struct audio_output *ao, const void *chunk, size_t size,
|
||||
Error &error)
|
||||
{
|
||||
JackOutput *jd = (JackOutput *)ao;
|
||||
const size_t frame_size = jd->audio_format.GetFrameSize();
|
||||
size_t space = 0, space1;
|
||||
|
||||
jd->pause = false;
|
||||
|
||||
assert(size % frame_size == 0);
|
||||
size /= frame_size;
|
||||
|
||||
while (true) {
|
||||
if (jd->shutdown) {
|
||||
error.Set(jack_output_domain,
|
||||
"Refusing to play, because "
|
||||
"there is no client thread");
|
||||
return 0;
|
||||
}
|
||||
|
||||
space = jack_ringbuffer_write_space(jd->ringbuffer[0]);
|
||||
for (unsigned i = 1; i < jd->audio_format.channels; ++i) {
|
||||
space1 = jack_ringbuffer_write_space(jd->ringbuffer[i]);
|
||||
if (space > space1)
|
||||
/* send data symmetrically */
|
||||
space = space1;
|
||||
}
|
||||
|
||||
if (space >= jack_sample_size)
|
||||
break;
|
||||
|
||||
/* XXX do something more intelligent to
|
||||
synchronize */
|
||||
g_usleep(1000);
|
||||
}
|
||||
|
||||
space /= jack_sample_size;
|
||||
if (space < size)
|
||||
size = space;
|
||||
|
||||
mpd_jack_write_samples(jd, chunk, size);
|
||||
return size * frame_size;
|
||||
}
|
||||
|
||||
static bool
|
||||
mpd_jack_pause(struct audio_output *ao)
|
||||
{
|
||||
JackOutput *jd = (JackOutput *)ao;
|
||||
|
||||
if (jd->shutdown)
|
||||
return false;
|
||||
|
||||
jd->pause = true;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
const struct audio_output_plugin jack_output_plugin = {
|
||||
"jack",
|
||||
mpd_jack_test_default_device,
|
||||
mpd_jack_init,
|
||||
mpd_jack_finish,
|
||||
mpd_jack_enable,
|
||||
mpd_jack_disable,
|
||||
mpd_jack_open,
|
||||
mpd_jack_close,
|
||||
mpd_jack_delay,
|
||||
nullptr,
|
||||
mpd_jack_play,
|
||||
nullptr,
|
||||
nullptr,
|
||||
mpd_jack_pause,
|
||||
nullptr,
|
||||
};
|
||||
Reference in New Issue
Block a user