mirror of https://github.com/mpv-player/mpv
371 lines
11 KiB
C
371 lines
11 KiB
C
/*
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* JACK audio output driver for MPlayer
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*
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* Copyleft 2001 by Felix Bünemann (atmosfear@users.sf.net)
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* and Reimar Döffinger (Reimar.Doeffinger@stud.uni-karlsruhe.de)
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*
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* This file is part of MPlayer.
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*
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* MPlayer 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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* MPlayer 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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* along with MPlayer; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "config.h"
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#include "mpvcore/mp_msg.h"
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#include "ao.h"
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#include "audio/format.h"
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#include "osdep/timer.h"
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#include "mpvcore/m_option.h"
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#include "mpvcore/mp_ring.h"
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#include <jack/jack.h>
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//! maximum number of channels supported, avoids lots of mallocs
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#define MAX_CHANS MP_NUM_CHANNELS
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//! size of one chunk, if this is too small MPlayer will start to "stutter"
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//! after a short time of playback
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#define CHUNK_SIZE (24 * 1024)
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//! number of "virtual" chunks the buffer consists of
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#define NUM_CHUNKS 8
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struct priv {
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jack_port_t * ports[MAX_CHANS];
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int num_ports; // Number of used ports == number of channels
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jack_client_t *client;
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int outburst;
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float jack_latency;
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char *cfg_port;
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char *cfg_client_name;
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int estimate;
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int connect;
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int autostart;
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int stdlayout;
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volatile int paused;
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volatile int underrun; // signals if an underrun occured
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volatile float callback_interval;
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volatile float callback_time;
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struct mp_ring *ring; // buffer for audio data
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};
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static void silence(float **bufs, int cnt, int num_bufs);
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struct deinterleave {
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float **bufs;
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int num_bufs;
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int cur_buf;
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int pos;
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};
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static void deinterleave(void *info, void *src, int len)
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{
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struct deinterleave *di = info;
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float *s = src;
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int i;
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len /= sizeof(float);
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for (i = 0; i < len; i++) {
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di->bufs[di->cur_buf++][di->pos] = s[i];
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if (di->cur_buf >= di->num_bufs) {
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di->cur_buf = 0;
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di->pos++;
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}
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}
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}
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/**
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* \brief read data from buffer and splitting it into channels
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* \param bufs num_bufs float buffers, each will contain the data of one channel
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* \param cnt number of samples to read per channel
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* \param num_bufs number of channels to split the data into
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* \return number of samples read per channel, equals cnt unless there was too
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* little data in the buffer
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*
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* Assumes the data in the buffer is of type float, the number of bytes
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* read is res * num_bufs * sizeof(float), where res is the return value.
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* If there is not enough data in the buffer remaining parts will be filled
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* with silence.
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*/
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static int read_buffer(struct mp_ring *ring, float **bufs, int cnt, int num_bufs)
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{
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struct deinterleave di = {
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bufs, num_bufs, 0, 0
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};
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int buffered = mp_ring_buffered(ring);
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if (cnt * sizeof(float) * num_bufs > buffered) {
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silence(bufs, cnt, num_bufs);
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cnt = buffered / sizeof(float) / num_bufs;
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}
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mp_ring_read_cb(ring, &di, cnt * num_bufs * sizeof(float), deinterleave);
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return cnt;
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}
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// end ring buffer stuff
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/**
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* \brief fill the buffers with silence
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* \param bufs num_bufs float buffers, each will contain the data of one channel
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* \param cnt number of samples in each buffer
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* \param num_bufs number of buffers
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*/
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static void silence(float **bufs, int cnt, int num_bufs)
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{
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int i;
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for (i = 0; i < num_bufs; i++)
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memset(bufs[i], 0, cnt * sizeof(float));
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}
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/**
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* \brief JACK Callback function
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* \param nframes number of frames to fill into buffers
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* \param arg unused
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* \return currently always 0
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*
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* Write silence into buffers if paused or an underrun occured
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*/
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static int outputaudio(jack_nframes_t nframes, void *arg)
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{
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struct ao *ao = arg;
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struct priv *p = ao->priv;
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float *bufs[MAX_CHANS];
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int i;
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for (i = 0; i < p->num_ports; i++)
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bufs[i] = jack_port_get_buffer(p->ports[i], nframes);
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if (p->paused || p->underrun || !p->ring)
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silence(bufs, nframes, p->num_ports);
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else if (read_buffer(p->ring, bufs, nframes, p->num_ports) < nframes)
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p->underrun = 1;
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if (p->estimate) {
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float now = mp_time_us() / 1000000.0;
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float diff = p->callback_time + p->callback_interval - now;
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if ((diff > -0.002) && (diff < 0.002))
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p->callback_time += p->callback_interval;
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else
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p->callback_time = now;
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p->callback_interval = (float)nframes / (float)ao->samplerate;
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}
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return 0;
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}
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static int init(struct ao *ao)
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{
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struct priv *p = ao->priv;
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const char **matching_ports = NULL;
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char *port_name = p->cfg_port && p->cfg_port[0] ? p->cfg_port : NULL;
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jack_options_t open_options = JackUseExactName;
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int port_flags = JackPortIsInput;
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int i;
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struct mp_chmap_sel sel = {0};
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if (p->stdlayout == 0) {
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mp_chmap_sel_add_waveext(&sel);
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} else if (p->stdlayout == 1) {
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mp_chmap_sel_add_alsa_def(&sel);
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} else {
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mp_chmap_sel_add_any(&sel);
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}
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if (!ao_chmap_sel_adjust(ao, &sel, &ao->channels))
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goto err_out;
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if (!p->autostart)
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open_options |= JackNoStartServer;
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p->client = jack_client_open(p->cfg_client_name, open_options, NULL);
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if (!p->client) {
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MP_FATAL(ao, "cannot open server\n");
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goto err_out;
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}
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jack_set_process_callback(p->client, outputaudio, ao);
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// list matching ports if connections should be made
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if (p->connect) {
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if (!port_name)
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port_flags |= JackPortIsPhysical;
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matching_ports = jack_get_ports(p->client, port_name, NULL, port_flags);
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if (!matching_ports || !matching_ports[0]) {
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MP_FATAL(ao, "no physical ports available\n");
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goto err_out;
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}
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i = 1;
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p->num_ports = ao->channels.num;
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while (matching_ports[i])
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i++;
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if (p->num_ports > i)
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p->num_ports = i;
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}
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// create out output ports
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for (i = 0; i < p->num_ports; i++) {
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char pname[30];
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snprintf(pname, 30, "out_%d", i);
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p->ports[i] =
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jack_port_register(p->client, pname, JACK_DEFAULT_AUDIO_TYPE,
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JackPortIsOutput, 0);
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if (!p->ports[i]) {
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MP_FATAL(ao, "not enough ports available\n");
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goto err_out;
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}
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}
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if (jack_activate(p->client)) {
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MP_FATAL(ao, "activate failed\n");
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goto err_out;
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}
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for (i = 0; i < p->num_ports; i++) {
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if (jack_connect(p->client, jack_port_name(p->ports[i]),
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matching_ports[i]))
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{
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MP_FATAL(ao, "connecting failed\n");
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goto err_out;
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}
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}
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ao->samplerate = jack_get_sample_rate(p->client);
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jack_latency_range_t jack_latency_range;
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jack_port_get_latency_range(p->ports[0], JackPlaybackLatency,
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&jack_latency_range);
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p->jack_latency = (float)(jack_latency_range.max + jack_get_buffer_size(p->client))
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/ (float)ao->samplerate;
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p->callback_interval = 0;
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if (!ao_chmap_sel_get_def(ao, &sel, &ao->channels, p->num_ports))
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goto err_out;
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ao->format = AF_FORMAT_FLOAT_NE;
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int unitsize = ao->channels.num * sizeof(float);
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p->outburst = (CHUNK_SIZE + unitsize - 1) / unitsize * unitsize;
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p->ring = mp_ring_new(p, NUM_CHUNKS * p->outburst);
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free(matching_ports);
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return 0;
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err_out:
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free(matching_ports);
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if (p->client)
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jack_client_close(p->client);
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return -1;
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}
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static float get_delay(struct ao *ao)
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{
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struct priv *p = ao->priv;
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int buffered = mp_ring_buffered(p->ring); // could be less
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float in_jack = p->jack_latency;
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if (p->estimate && p->callback_interval > 0) {
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float elapsed = mp_time_us() / 1000000.0 - p->callback_time;
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in_jack += p->callback_interval - elapsed;
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if (in_jack < 0)
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in_jack = 0;
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}
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return (float)buffered / (float)ao->bps + in_jack;
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}
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/**
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* \brief stop playing and empty buffers (for seeking/pause)
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*/
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static void reset(struct ao *ao)
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{
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struct priv *p = ao->priv;
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p->paused = 1;
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mp_ring_reset(p->ring);
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p->paused = 0;
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}
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// close audio device
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static void uninit(struct ao *ao, bool immed)
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{
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struct priv *p = ao->priv;
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if (!immed)
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mp_sleep_us(get_delay(ao) * 1000 * 1000);
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// HACK, make sure jack doesn't loop-output dirty buffers
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reset(ao);
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mp_sleep_us(100 * 1000);
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jack_client_close(p->client);
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}
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/**
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* \brief stop playing, keep buffers (for pause)
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*/
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static void audio_pause(struct ao *ao)
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{
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struct priv *p = ao->priv;
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p->paused = 1;
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}
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/**
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* \brief resume playing, after audio_pause()
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*/
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static void audio_resume(struct ao *ao)
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{
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struct priv *p = ao->priv;
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p->paused = 0;
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}
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static int get_space(struct ao *ao)
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{
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struct priv *p = ao->priv;
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return mp_ring_available(p->ring);
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}
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/**
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* \brief write data into buffer and reset underrun flag
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*/
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static int play(struct ao *ao, void *data, int len, int flags)
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{
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struct priv *p = ao->priv;
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if (!(flags & AOPLAY_FINAL_CHUNK))
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len -= len % p->outburst;
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p->underrun = 0;
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return mp_ring_write(p->ring, data, len);
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}
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#define OPT_BASE_STRUCT struct priv
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const struct ao_driver audio_out_jack = {
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.info = &(const struct ao_info) {
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"JACK audio output",
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"jack",
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"Reimar Döffinger <Reimar.Doeffinger@stud.uni-karlsruhe.de>",
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"based on ao_sdl.c"
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},
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.init = init,
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.uninit = uninit,
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.get_space = get_space,
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.play = play,
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.get_delay = get_delay,
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.pause = audio_pause,
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.resume = audio_resume,
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.reset = reset,
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.priv_size = sizeof(struct priv),
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.priv_defaults = &(const struct priv) {
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.cfg_client_name = "mpv",
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.estimate = 1,
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.connect = 1,
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},
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.options = (const struct m_option[]) {
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OPT_STRING("port", cfg_port, 0),
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OPT_STRING("name", cfg_client_name, 0),
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OPT_FLAG("estimate", estimate, 0),
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OPT_FLAG("autostart", autostart, 0),
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OPT_FLAG("connect", connect, 0),
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OPT_CHOICE("std-channel-layout", stdlayout, 0,
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({"waveext", 0}, {"alsa", 1}, {"any", 2})),
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{0}
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},
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};
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