mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 23:32:26 +00:00
e4e7fade96
So whoever (nobody?) would want to deal with this broken and obscure AO for an obscure audio API could add support for some more channel layouts.
327 lines
8.3 KiB
C
327 lines
8.3 KiB
C
/*
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* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
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* Copyright (c) 2013 Christian Neukirchen <chneukirchen@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <poll.h>
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#include <errno.h>
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#include <sndio.h>
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#include "options/m_option.h"
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#include "common/msg.h"
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#include "audio/format.h"
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#include "ao.h"
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#include "internal.h"
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struct priv {
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struct sio_hdl *hdl;
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struct sio_par par;
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int delay;
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bool playing;
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int vol;
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int havevol;
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#define SILENCE_NMAX 0x1000
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char silence[SILENCE_NMAX];
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struct pollfd *pfd;
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char *dev;
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};
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/*
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* misc parameters (volume, etc...)
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*/
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static int control(struct ao *ao, enum aocontrol cmd, void *arg)
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{
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struct priv *p = ao->priv;
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ao_control_vol_t *vol = arg;
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switch (cmd) {
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case AOCONTROL_GET_VOLUME:
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if (!p->havevol)
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return CONTROL_FALSE;
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vol->left = vol->right = p->vol * 100 / SIO_MAXVOL;
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break;
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case AOCONTROL_SET_VOLUME:
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if (!p->havevol)
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return CONTROL_FALSE;
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sio_setvol(p->hdl, vol->left * SIO_MAXVOL / 100);
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break;
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case AOCONTROL_HAS_SOFT_VOLUME:
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return CONTROL_TRUE;
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default:
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return CONTROL_UNKNOWN;
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}
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return CONTROL_OK;
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}
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/*
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* call-back invoked to notify of the hardware position
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*/
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static void movecb(void *addr, int delta)
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{
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struct priv *p = addr;
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p->delay -= delta;
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}
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/*
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* call-back invoked to notify about volume changes
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*/
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static void volcb(void *addr, unsigned newvol)
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{
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struct priv *p = addr;
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p->vol = newvol;
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}
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static const struct mp_chmap sndio_layouts[MP_NUM_CHANNELS + 1] = {
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{0}, // empty
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{1, {MP_SPEAKER_ID_FL}}, // mono
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MP_CHMAP2(FL, FR), // stereo
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{0}, // 2.1
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MP_CHMAP4(FL, FR, BL, BR), // 4.0
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{0}, // 5.0
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MP_CHMAP6(FL, FR, BL, BR, FC, LFE), // 5.1
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{0}, // 6.1
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MP_CHMAP8(FL, FR, BL, BR, FC, LFE, SL, SR), // 7.1
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/* above is the fixed channel assignment for sndio, since we need to fill
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all channels and cannot insert silence, not all layouts are supported.
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NOTE: MP_SPEAKER_ID_NA could be used to add padding channels. */
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};
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/*
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* open device and setup parameters
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* return: 0=success -1=fail
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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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struct af_to_par {
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int format, bits, sig;
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};
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static const struct af_to_par af_to_par[] = {
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{AF_FORMAT_U8, 8, 0},
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{AF_FORMAT_S16, 16, 1},
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{AF_FORMAT_S24, 24, 1},
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{AF_FORMAT_S32, 32, 1},
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};
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const struct af_to_par *ap;
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int i;
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p->hdl = sio_open(p->dev, SIO_PLAY, 0);
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if (p->hdl == NULL) {
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MP_ERR(ao, "can't open sndio %s\n", p->dev);
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goto error;
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}
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ao->format = af_fmt_from_planar(ao->format);
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sio_initpar(&p->par);
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for (i = 0, ap = af_to_par;; i++, ap++) {
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if (i == sizeof(af_to_par) / sizeof(struct af_to_par)) {
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MP_VERBOSE(ao, "unsupported format\n");
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p->par.bits = 16;
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p->par.sig = 1;
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p->par.le = SIO_LE_NATIVE;
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break;
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}
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if (ap->format == ao->format) {
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p->par.bits = ap->bits;
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p->par.sig = ap->sig;
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if (ap->bits > 8)
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p->par.le = SIO_LE_NATIVE;
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if (ap->bits != SIO_BPS(ap->bits))
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p->par.bps = ap->bits / 8;
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break;
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}
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}
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p->par.rate = ao->samplerate;
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struct mp_chmap_sel sel = {0};
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for (int n = 0; n < MP_NUM_CHANNELS+1; n++)
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mp_chmap_sel_add_map(&sel, &sndio_layouts[n]);
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if (!ao_chmap_sel_adjust(ao, &sel, &ao->channels))
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goto error;
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p->par.pchan = ao->channels.num;
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p->par.appbufsz = p->par.rate * 250 / 1000; /* 250ms buffer */
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p->par.round = p->par.rate * 10 / 1000; /* 10ms block size */
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if (!sio_setpar(p->hdl, &p->par)) {
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MP_ERR(ao, "couldn't set params\n");
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goto error;
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}
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if (!sio_getpar(p->hdl, &p->par)) {
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MP_ERR(ao, "couldn't get params\n");
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goto error;
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}
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if (p->par.bps > 1 && p->par.le != SIO_LE_NATIVE) {
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MP_ERR(ao, "swapped endian output not supported\n");
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goto error;
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}
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if (p->par.bits == 8 && p->par.bps == 1 && !p->par.sig) {
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ao->format = AF_FORMAT_U8;
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} else if (p->par.bits == 16 && p->par.bps == 2 && p->par.sig) {
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ao->format = AF_FORMAT_S16;
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} else if ((p->par.bits == 24 || p->par.msb) && p->par.bps == 3 && p->par.sig) {
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ao->format = AF_FORMAT_S24;
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} else if ((p->par.bits == 32 || p->par.msb) && p->par.bps == 4 && p->par.sig) {
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ao->format = AF_FORMAT_S32;
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} else {
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MP_ERR(ao, "couldn't set format\n");
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goto error;
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}
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p->havevol = sio_onvol(p->hdl, volcb, p);
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sio_onmove(p->hdl, movecb, p);
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if (!sio_start(p->hdl))
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MP_ERR(ao, "init: couldn't start\n");
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p->pfd = calloc (sio_nfds(p->hdl), sizeof (struct pollfd));
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if (!p->pfd)
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goto error;
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return 0;
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error:
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if (p->hdl)
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sio_close(p->hdl);
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return -1;
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}
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/*
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* close device
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*/
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static void uninit(struct ao *ao)
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{
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struct priv *p = ao->priv;
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if (p->hdl)
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sio_close(p->hdl);
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free(p->pfd);
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}
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/*
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* 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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if (p->playing) {
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MP_WARN(ao, "Blocking until remaining audio is played... (sndio design bug).\n");
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p->playing = false;
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if (!sio_stop(p->hdl))
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MP_ERR(ao, "reset: couldn't stop\n");
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p->delay = 0;
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if (!sio_start(p->hdl))
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MP_ERR(ao, "reset: couldn't start\n");
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}
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}
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/*
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* play given number of samples until sio_write() blocks
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*/
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static int play(struct ao *ao, void **data, int samples, int flags)
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{
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struct priv *p = ao->priv;
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int n;
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n = sio_write(p->hdl, data[0], samples * ao->sstride) / ao->sstride;
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p->delay += n;
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p->playing = true;
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/* on AOPLAY_FINAL_CHUNK, just let it underrun */
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return n;
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}
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/*
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* make libsndio call movecb()
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*/
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static void update(struct ao *ao)
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{
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struct priv *p = ao->priv;
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int n = sio_pollfd(p->hdl, p->pfd, POLLOUT);
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while (poll(p->pfd, n, 0) < 0 && errno == EINTR) {}
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sio_revents(p->hdl, p->pfd);
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}
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/*
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* how many samples can be played without blocking
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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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update(ao);
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int samples = p->par.bufsz - p->delay;
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return samples / p->par.round * p->par.round;
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}
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/*
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* return: delay in seconds between first and last sample in buffer
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*/
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static double get_delay(struct ao *ao)
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{
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struct priv *p = ao->priv;
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update(ao);
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return p->delay / (double)p->par.rate;
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}
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/*
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* 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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reset(ao);
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}
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/*
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* 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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return;
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}
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#define OPT_BASE_STRUCT struct priv
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const struct ao_driver audio_out_sndio = {
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.description = "sndio audio output",
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.name = "sndio",
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.init = init,
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.uninit = uninit,
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.control = control,
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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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.options = (const struct m_option[]) {
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OPT_STRING("device", dev, 0, OPTDEF_STR(SIO_DEVANY)),
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{0}
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},
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};
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