mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 15:22:09 +00:00
831d7c3c40
They are useless. Not only are they actually rarely in use; but libavcodec doesn't even output them, as libavcodec has no such sample formats for decoded audio. Even if it should happen that we actually still need them (e.g. if doing direct hardware output), there are better solutions. Swapping the sign is a fast and lossless operation and can be done inplace, so AO actually needing it could do this directly. If you wonder why we keep U8 instead of S8: because libavcodec does it.
165 lines
3.7 KiB
C
165 lines
3.7 KiB
C
/*
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* RSound audio output driver
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*
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* Copyright (C) 2011 Hans-Kristian Arntzen
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*
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* This file is part of mpv.
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*
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* mpv 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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* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.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 <rsound.h>
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#include "talloc.h"
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#include "options/m_option.h"
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#include "osdep/timer.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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rsound_t *rd;
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char *host;
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char *port;
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};
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static int set_format(struct ao *ao)
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{
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int rsd_format;
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switch (ao->format) {
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case AF_FORMAT_U8:
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rsd_format = RSD_U8;
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break;
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case AF_FORMAT_S32:
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rsd_format = RSD_S32_NE;
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break;
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default:
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rsd_format = RSD_S16_NE;
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ao->format = AF_FORMAT_S16;
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}
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return rsd_format;
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}
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static int init(struct ao *ao)
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{
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struct priv *priv = ao->priv;
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if (rsd_init(&priv->rd) < 0)
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return -1;
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if (priv->host && priv->host[0])
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rsd_set_param(priv->rd, RSD_HOST, priv->host);
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if (priv->port && priv->port[0])
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rsd_set_param(priv->rd, RSD_PORT, priv->port);
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// Actual channel layout unknown.
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struct mp_chmap_sel sel = {0};
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mp_chmap_sel_add_waveext_def(&sel);
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if (!ao_chmap_sel_adjust(ao, &sel, &ao->channels)) {
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rsd_free(priv->rd);
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return -1;
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}
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rsd_set_param(priv->rd, RSD_SAMPLERATE, (int[]) { ao->samplerate });
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rsd_set_param(priv->rd, RSD_CHANNELS, (int[]) { ao->channels.num });
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ao->format = af_fmt_from_planar(ao->format);
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int rsd_format = set_format(ao);
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rsd_set_param(priv->rd, RSD_FORMAT, &rsd_format);
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if (rsd_start(priv->rd) < 0) {
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rsd_free(priv->rd);
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return -1;
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}
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return 0;
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}
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static void uninit(struct ao *ao)
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{
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struct priv *priv = ao->priv;
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rsd_stop(priv->rd);
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rsd_free(priv->rd);
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}
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static void reset(struct ao *ao)
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{
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struct priv *priv = ao->priv;
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rsd_stop(priv->rd);
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rsd_start(priv->rd);
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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 *priv = ao->priv;
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rsd_pause(priv->rd, 1);
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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 *priv = ao->priv;
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rsd_pause(priv->rd, 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 *priv = ao->priv;
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return rsd_get_avail(priv->rd) / ao->sstride;
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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 *priv = ao->priv;
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return rsd_write(priv->rd, data[0], samples * ao->sstride) / ao->sstride;
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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 *priv = ao->priv;
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return rsd_delay_ms(priv->rd) / 1000.0;
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}
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#define OPT_BASE_STRUCT struct priv
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const struct ao_driver audio_out_rsound = {
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.description = "RSound output driver",
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.name = "rsound",
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.init = init,
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.uninit = uninit,
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.reset = reset,
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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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.priv_size = sizeof(struct priv),
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.options = (const struct m_option[]) {
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OPT_STRING("host", host, 0),
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OPT_STRING("port", port, 0),
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{0}
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},
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};
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