mpv/audio/out/ao_jack.c

285 lines
6.8 KiB
C

/*
* JACK audio output driver for MPlayer
*
* Copyleft 2001 by Felix Bünemann (atmosfear@users.sf.net)
* and Reimar Döffinger (Reimar.Doeffinger@stud.uni-karlsruhe.de)
*
* Copyleft 2013 by William Light <wrl@illest.net> for the mpv project
*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdatomic.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "config.h"
#include "common/msg.h"
#include "ao.h"
#include "internal.h"
#include "audio/format.h"
#include "osdep/timer.h"
#include "options/m_config.h"
#include "options/m_option.h"
#include <jack/jack.h>
#if !HAVE_GPL
#error GPL only
#endif
struct jack_opts {
char *port;
char *client_name;
bool connect;
bool autostart;
int stdlayout;
};
#define OPT_BASE_STRUCT struct jack_opts
static const struct m_sub_options ao_jack_conf = {
.opts = (const struct m_option[]){
{"jack-port", OPT_STRING(port)},
{"jack-name", OPT_STRING(client_name)},
{"jack-autostart", OPT_BOOL(autostart)},
{"jack-connect", OPT_BOOL(connect)},
{"jack-std-channel-layout", OPT_CHOICE(stdlayout,
{"waveext", 0}, {"any", 1})},
{0}
},
.defaults = &(const struct jack_opts) {
.client_name = "mpv",
.connect = true,
},
.size = sizeof(struct jack_opts),
};
struct priv {
jack_client_t *client;
atomic_uint graph_latency_max;
atomic_uint buffer_size;
int last_chunk;
int num_ports;
jack_port_t *ports[MP_NUM_CHANNELS];
int activated;
struct jack_opts *opts;
};
static int graph_order_cb(void *arg)
{
struct ao *ao = arg;
struct priv *p = ao->priv;
jack_latency_range_t jack_latency_range;
jack_port_get_latency_range(p->ports[0], JackPlaybackLatency,
&jack_latency_range);
atomic_store(&p->graph_latency_max, jack_latency_range.max);
return 0;
}
static int buffer_size_cb(jack_nframes_t nframes, void *arg)
{
struct ao *ao = arg;
struct priv *p = ao->priv;
atomic_store(&p->buffer_size, nframes);
return 0;
}
static int process(jack_nframes_t nframes, void *arg)
{
struct ao *ao = arg;
struct priv *p = ao->priv;
void *buffers[MP_NUM_CHANNELS];
for (int i = 0; i < p->num_ports; i++)
buffers[i] = jack_port_get_buffer(p->ports[i], nframes);
jack_nframes_t jack_latency =
atomic_load(&p->graph_latency_max) + atomic_load(&p->buffer_size);
int64_t end_time = mp_time_ns();
end_time += MP_TIME_S_TO_NS((jack_latency + nframes) / (double)ao->samplerate);
ao_read_data(ao, buffers, nframes, end_time);
return 0;
}
static int
connect_to_outports(struct ao *ao)
{
struct priv *p = ao->priv;
char *port_name = (p->opts->port && p->opts->port[0]) ? p->opts->port : NULL;
const char **matching_ports = NULL;
int port_flags = JackPortIsInput;
int i;
if (!port_name)
port_flags |= JackPortIsPhysical;
const char *port_type = JACK_DEFAULT_AUDIO_TYPE; // exclude MIDI ports
matching_ports = jack_get_ports(p->client, port_name, port_type, port_flags);
if (!matching_ports || !matching_ports[0]) {
MP_FATAL(ao, "no ports to connect to\n");
goto err_get_ports;
}
for (i = 0; i < p->num_ports && matching_ports[i]; i++) {
if (jack_connect(p->client, jack_port_name(p->ports[i]),
matching_ports[i]))
{
MP_FATAL(ao, "connecting failed\n");
goto err_connect;
}
}
free(matching_ports);
return 0;
err_connect:
free(matching_ports);
err_get_ports:
return -1;
}
static int
create_ports(struct ao *ao, int nports)
{
struct priv *p = ao->priv;
char pname[30];
int i;
for (i = 0; i < nports; i++) {
snprintf(pname, sizeof(pname), "out_%d", i);
p->ports[i] = jack_port_register(p->client, pname, JACK_DEFAULT_AUDIO_TYPE,
JackPortIsOutput, 0);
if (!p->ports[i]) {
MP_FATAL(ao, "not enough ports available\n");
goto err_port_register;
}
}
p->num_ports = nports;
return 0;
err_port_register:
return -1;
}
static void start(struct ao *ao)
{
struct priv *p = ao->priv;
if (!p->activated) {
p->activated = true;
if (jack_activate(p->client))
MP_FATAL(ao, "activate failed\n");
if (p->opts->connect)
connect_to_outports(ao);
}
}
static int init(struct ao *ao)
{
struct priv *p = ao->priv;
struct mp_chmap_sel sel = {0};
jack_options_t open_options;
p->opts = mp_get_config_group(ao, ao->global, &ao_jack_conf);
ao->format = AF_FORMAT_FLOATP;
switch (p->opts->stdlayout) {
case 0:
mp_chmap_sel_add_waveext(&sel);
break;
default:
mp_chmap_sel_add_any(&sel);
}
if (!ao_chmap_sel_adjust(ao, &sel, &ao->channels))
goto err_chmap;
open_options = JackNullOption;
if (!p->opts->autostart)
open_options |= JackNoStartServer;
p->client = jack_client_open(p->opts->client_name, open_options, NULL);
if (!p->client) {
MP_FATAL(ao, "cannot open server\n");
goto err_client_open;
}
if (create_ports(ao, ao->channels.num))
goto err_create_ports;
jack_set_process_callback(p->client, process, ao);
ao->samplerate = jack_get_sample_rate(p->client);
// The actual device buffer can change, but this is enough for pre-buffer
ao->device_buffer = jack_get_buffer_size(p->client);
jack_set_buffer_size_callback(p->client, buffer_size_cb, ao);
jack_set_graph_order_callback(p->client, graph_order_cb, ao);
if (!ao_chmap_sel_get_def(ao, &sel, &ao->channels, p->num_ports))
goto err_chmap_sel_get_def;
return 0;
err_chmap_sel_get_def:
err_create_ports:
jack_client_close(p->client);
err_client_open:
err_chmap:
return -1;
}
// close audio device
static void uninit(struct ao *ao)
{
struct priv *p = ao->priv;
jack_client_close(p->client);
}
const struct ao_driver audio_out_jack = {
.description = "JACK audio output",
.name = "jack",
.init = init,
.uninit = uninit,
.start = start,
.priv_size = sizeof(struct priv),
.global_opts = &ao_jack_conf,
};