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🎥 Command line media player
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C
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284/* * 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 "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_optsstatic 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, NULL, true, true);
return 0;}
static intconnect_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 intcreate_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 devicestatic 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,};