mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 23:32:26 +00:00
31a10f7c38
In most places where af_fmt2bits is called to get the bits/sample, the result is immediately converted to bytes/sample. Avoid this by getting bytes/sample directly by introducing af_fmt2bps.
627 lines
18 KiB
C
627 lines
18 KiB
C
/*
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* OSS audio output driver
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*
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* This file is part of MPlayer.
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*
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* Original author: A'rpi
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* Support for >2 output channels added 2001-11-25
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* - Steve Davies <steve@daviesfam.org>
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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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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 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 <sys/ioctl.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include "config.h"
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#include "options/options.h"
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#include "common/msg.h"
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#if HAVE_SYS_SOUNDCARD_H
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#include <sys/soundcard.h>
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#else
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#if HAVE_SOUNDCARD_H
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#include <soundcard.h>
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#endif
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#endif
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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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int audio_fd;
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int prepause_space;
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int oss_mixer_channel;
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audio_buf_info zz;
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int audio_delay_method;
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int buffersize;
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int outburst;
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char *dsp;
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char *oss_mixer_device;
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char *cfg_oss_mixer_channel;
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};
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static const char *mixer_channels[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
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/* like alsa except for 6.1 and 7.1, from pcm/matrix_map.h */
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static const struct mp_chmap oss_layouts[MP_NUM_CHANNELS + 1] = {
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{0}, // empty
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MP_CHMAP_INIT_MONO, // mono
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MP_CHMAP2(FL, FR), // stereo
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MP_CHMAP3(FL, FR, LFE), // 2.1
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MP_CHMAP4(FL, FR, BL, BR), // 4.0
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MP_CHMAP5(FL, FR, BL, BR, FC), // 5.0
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MP_CHMAP6(FL, FR, BL, BR, FC, LFE), // 5.1
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MP_CHMAP7(FL, FR, BL, BR, FC, LFE, BC), // 6.1
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MP_CHMAP8(FL, FR, BL, BR, FC, LFE, SL, SR), // 7.1
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};
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static int format_table[][2] = {
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{AFMT_U8, AF_FORMAT_U8},
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{AFMT_S8, AF_FORMAT_S8},
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{AFMT_U16_LE, AF_FORMAT_U16_LE},
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{AFMT_U16_BE, AF_FORMAT_U16_BE},
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{AFMT_S16_LE, AF_FORMAT_S16_LE},
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{AFMT_S16_BE, AF_FORMAT_S16_BE},
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#ifdef AFMT_S24_PACKED
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{AFMT_S24_PACKED, AF_FORMAT_S24_LE},
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#endif
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#ifdef AFMT_U24_LE
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{AFMT_U24_LE, AF_FORMAT_U24_LE},
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#endif
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#ifdef AFMT_U24_BE
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{AFMT_U24_BE, AF_FORMAT_U24_BE},
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#endif
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#ifdef AFMT_S24_LE
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{AFMT_S24_LE, AF_FORMAT_S24_LE},
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#endif
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#ifdef AFMT_S24_BE
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{AFMT_S24_BE, AF_FORMAT_S24_BE},
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#endif
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#ifdef AFMT_U32_LE
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{AFMT_U32_LE, AF_FORMAT_U32_LE},
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#endif
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#ifdef AFMT_U32_BE
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{AFMT_U32_BE, AF_FORMAT_U32_BE},
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#endif
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#ifdef AFMT_S32_LE
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{AFMT_S32_LE, AF_FORMAT_S32_LE},
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#endif
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#ifdef AFMT_S32_BE
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{AFMT_S32_BE, AF_FORMAT_S32_BE},
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#endif
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#ifdef AFMT_FLOAT
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{AFMT_FLOAT, AF_FORMAT_FLOAT},
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#endif
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// SPECIALS
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#ifdef AFMT_MPEG
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{AFMT_MPEG, AF_FORMAT_MPEG2},
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#endif
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#ifdef AFMT_AC3
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{AFMT_AC3, AF_FORMAT_AC3},
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#endif
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{-1, -1}
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};
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static int format2oss(int format)
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{
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for (int n = 0; format_table[n][0] != -1; n++) {
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if (format_table[n][1] == format)
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return format_table[n][0];
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}
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return -1;
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}
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static int oss2format(int format)
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{
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for (int n = 0; format_table[n][0] != -1; n++) {
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if (format_table[n][0] == format)
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return format_table[n][1];
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}
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return -1;
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}
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#ifdef SNDCTL_DSP_GETPLAYVOL
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static int volume_oss4(struct ao *ao, ao_control_vol_t *vol, int cmd)
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{
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struct priv *p = ao->priv;
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int v;
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if (p->audio_fd < 0)
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return CONTROL_ERROR;
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if (cmd == AOCONTROL_GET_VOLUME) {
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if (ioctl(p->audio_fd, SNDCTL_DSP_GETPLAYVOL, &v) == -1)
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return CONTROL_ERROR;
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vol->right = (v & 0xff00) >> 8;
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vol->left = v & 0x00ff;
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return CONTROL_OK;
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} else if (cmd == AOCONTROL_SET_VOLUME) {
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v = ((int) vol->right << 8) | (int) vol->left;
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if (ioctl(p->audio_fd, SNDCTL_DSP_SETPLAYVOL, &v) == -1)
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return CONTROL_ERROR;
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return CONTROL_OK;
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} else
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return CONTROL_UNKNOWN;
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}
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#endif
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// to set/get/query special features/parameters
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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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switch (cmd) {
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case AOCONTROL_GET_VOLUME:
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case AOCONTROL_SET_VOLUME:
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{
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ao_control_vol_t *vol = (ao_control_vol_t *)arg;
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int fd, v, devs;
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#ifdef SNDCTL_DSP_GETPLAYVOL
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// Try OSS4 first
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if (volume_oss4(ao, vol, cmd) == CONTROL_OK)
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return CONTROL_OK;
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#endif
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if (AF_FORMAT_IS_AC3(ao->format))
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return CONTROL_TRUE;
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if ((fd = open(p->oss_mixer_device, O_RDONLY)) != -1) {
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ioctl(fd, SOUND_MIXER_READ_DEVMASK, &devs);
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if (devs & (1 << p->oss_mixer_channel)) {
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if (cmd == AOCONTROL_GET_VOLUME) {
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ioctl(fd, MIXER_READ(p->oss_mixer_channel), &v);
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vol->right = (v & 0xFF00) >> 8;
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vol->left = v & 0x00FF;
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} else {
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v = ((int)vol->right << 8) | (int)vol->left;
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ioctl(fd, MIXER_WRITE(p->oss_mixer_channel), &v);
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}
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} else {
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close(fd);
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return CONTROL_ERROR;
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}
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close(fd);
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return CONTROL_OK;
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}
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}
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return CONTROL_ERROR;
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}
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return CONTROL_UNKNOWN;
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}
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// open & setup audio device
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// return: 0=success -1=fail
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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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int oss_format;
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#ifdef SNDCTL_DSP_GETPLAYVOL
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ao->no_persistent_volume = true;
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#endif
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const char *mchan = NULL;
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if (p->cfg_oss_mixer_channel && p->cfg_oss_mixer_channel[0])
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mchan = p->cfg_oss_mixer_channel;
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if (mchan) {
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int fd, devs, i;
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if ((fd = open(p->oss_mixer_device, O_RDONLY)) == -1) {
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MP_ERR(ao, "Can't open mixer device %s: %s\n",
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p->oss_mixer_device, strerror(errno));
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} else {
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ioctl(fd, SOUND_MIXER_READ_DEVMASK, &devs);
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close(fd);
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for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
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if (!strcasecmp(mixer_channels[i], mchan)) {
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if (!(devs & (1 << i))) {
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MP_ERR(ao, "Audio card mixer does not have "
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"channel '%s', using default.\n", mchan);
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i = SOUND_MIXER_NRDEVICES + 1;
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break;
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}
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p->oss_mixer_channel = i;
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break;
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}
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}
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if (i == SOUND_MIXER_NRDEVICES) {
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MP_ERR(ao, "Audio card mixer does not have "
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"channel '%s', using default.\n", mchan);
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}
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}
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} else {
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p->oss_mixer_channel = SOUND_MIXER_PCM;
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}
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MP_VERBOSE(ao, "using '%s' dsp device\n", p->dsp);
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MP_VERBOSE(ao, "using '%s' mixer device\n", p->oss_mixer_device);
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MP_VERBOSE(ao, "using '%s' mixer device\n", mixer_channels[p->oss_mixer_channel]);
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#ifdef __linux__
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p->audio_fd = open(p->dsp, O_WRONLY | O_NONBLOCK);
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#else
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p->audio_fd = open(p->dsp, O_WRONLY);
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#endif
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if (p->audio_fd < 0) {
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MP_ERR(ao, "Can't open audio device %s: %s\n", p->dsp, strerror(errno));
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return -1;
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}
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#ifdef __linux__
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/* Remove the non-blocking flag */
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if (fcntl(p->audio_fd, F_SETFL, 0) < 0) {
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MP_ERR(ao, "Can't make file descriptor blocking: %s\n", strerror(errno));
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return -1;
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}
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#endif
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#if defined(FD_CLOEXEC) && defined(F_SETFD)
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fcntl(p->audio_fd, F_SETFD, FD_CLOEXEC);
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#endif
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ao->format = af_fmt_from_planar(ao->format);
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if (AF_FORMAT_IS_AC3(ao->format)) {
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ioctl(p->audio_fd, SNDCTL_DSP_SPEED, &ao->samplerate);
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}
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ac3_retry:
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if (AF_FORMAT_IS_AC3(ao->format))
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ao->format = AF_FORMAT_AC3;
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oss_format = format2oss(ao->format);
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if (oss_format == -1) {
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MP_VERBOSE(ao, "Unknown/not supported internal format: %s\n",
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af_fmt_to_str(ao->format));
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#if defined(AFMT_S32_LE) && defined(AFMT_S32_BE)
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#if BYTE_ORDER == BIG_ENDIAN
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oss_format = AFMT_S32_BE;
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#else
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oss_format = AFMT_S32_LE;
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#endif
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ao->format = AF_FORMAT_S32;
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#elif defined(AFMT_S24_LE) && defined(AFMT_S24_BE)
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#if BYTE_ORDER == BIG_ENDIAN
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oss_format = AFMT_S24_BE;
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#else
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oss_format = AFMT_S24_LE;
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#endif
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ao->format = AF_FORMAT_S24;
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#else
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#if BYTE_ORDER == BIG_ENDIAN
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oss_format = AFMT_S16_BE;
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#else
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oss_format = AFMT_S16_LE;
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#endif
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ao->format = AF_FORMAT_S16;
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#endif
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}
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if (ioctl(p->audio_fd, SNDCTL_DSP_SETFMT, &oss_format) < 0 ||
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oss_format != format2oss(ao->format))
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{
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MP_WARN(ao, "Can't set audio device %s to %s output, trying %s...\n",
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p->dsp, af_fmt_to_str(ao->format),
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af_fmt_to_str(AF_FORMAT_S16));
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ao->format = AF_FORMAT_S16;
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goto ac3_retry;
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}
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ao->format = oss2format(oss_format);
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if (ao->format == -1) {
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MP_ERR(ao, "Unknown/Unsupported OSS format: %x.\n", oss_format);
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return -1;
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}
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MP_VERBOSE(ao, "sample format: %s\n", af_fmt_to_str(ao->format));
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if (!AF_FORMAT_IS_AC3(ao->format)) {
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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, &oss_layouts[n]);
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if (!ao_chmap_sel_adjust(ao, &sel, &ao->channels))
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return -1;
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int reqchannels = ao->channels.num;
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// We only use SNDCTL_DSP_CHANNELS for >2 channels, in case some drivers don't have it
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if (reqchannels > 2) {
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int nchannels = reqchannels;
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if (ioctl(p->audio_fd, SNDCTL_DSP_CHANNELS, &nchannels) == -1 ||
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nchannels != reqchannels)
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{
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MP_ERR(ao, "Failed to set audio device to %d channels.\n",
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reqchannels);
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return -1;
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}
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} else {
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int c = reqchannels - 1;
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if (ioctl(p->audio_fd, SNDCTL_DSP_STEREO, &c) == -1) {
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MP_ERR(ao, "Failed to set audio device to %d channels.\n",
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reqchannels);
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return -1;
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}
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if (!ao_chmap_sel_get_def(ao, &sel, &ao->channels, c + 1))
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return -1;
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}
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MP_VERBOSE(ao, "using %d channels (requested: %d)\n",
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ao->channels.num, reqchannels);
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// set rate
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ioctl(p->audio_fd, SNDCTL_DSP_SPEED, &ao->samplerate);
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MP_VERBOSE(ao, "using %d Hz samplerate\n", ao->samplerate);
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}
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if (ioctl(p->audio_fd, SNDCTL_DSP_GETOSPACE, &p->zz) == -1) {
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int r = 0;
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MP_WARN(ao, "driver doesn't support SNDCTL_DSP_GETOSPACE\n");
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if (ioctl(p->audio_fd, SNDCTL_DSP_GETBLKSIZE, &r) == -1)
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MP_VERBOSE(ao, "%d bytes/frag (config.h)\n", p->outburst);
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else {
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p->outburst = r;
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MP_VERBOSE(ao, "%d bytes/frag (GETBLKSIZE)\n", p->outburst);
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}
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} else {
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MP_VERBOSE(ao, "frags: %3d/%d (%d bytes/frag) free: %6d\n",
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p->zz.fragments, p->zz.fragstotal, p->zz.fragsize, p->zz.bytes);
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p->buffersize = p->zz.bytes;
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p->outburst = p->zz.fragsize;
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}
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if (p->buffersize == -1) {
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// Measuring buffer size:
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void *data;
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p->buffersize = 0;
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#if HAVE_AUDIO_SELECT
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data = malloc(p->outburst);
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memset(data, 0, p->outburst);
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while (p->buffersize < 0x40000) {
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fd_set rfds;
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struct timeval tv;
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FD_ZERO(&rfds);
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FD_SET(p->audio_fd, &rfds);
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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if (!select(p->audio_fd + 1, NULL, &rfds, NULL, &tv))
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break;
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write(p->audio_fd, data, p->outburst);
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p->buffersize += p->outburst;
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}
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free(data);
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if (p->buffersize == 0) {
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MP_ERR(ao, "*** Your audio driver DOES NOT support select() ***\n");
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MP_ERR(ao, "Recompile mpv with #define HAVE_AUDIO_SELECT 0 in config.h!\n");
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return -1;
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}
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#endif
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}
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ao->bps = ao->channels.num * af_fmt2bps(ao->format);
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p->outburst -= p->outburst % ao->bps; // round down
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ao->bps *= ao->samplerate;
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return 0;
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}
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// close audio device
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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->audio_fd == -1)
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return;
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#ifdef SNDCTL_DSP_RESET
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ioctl(p->audio_fd, SNDCTL_DSP_RESET, NULL);
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#endif
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close(p->audio_fd);
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p->audio_fd = -1;
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}
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static void drain(struct ao *ao)
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{
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#ifdef SNDCTL_DSP_SYNC
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struct priv *p = ao->priv;
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// to get the buffer played
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if (p->audio_fd != -1)
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ioctl(p->audio_fd, SNDCTL_DSP_SYNC, NULL);
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#endif
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}
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#ifndef SNDCTL_DSP_RESET
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static void close_device(struct ao *ao)
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{
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struct priv *p = ao->priv;
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close(p->audio_fd);
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p->audio_fd = -1;
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}
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#endif
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// stop playing and empty buffers (for seeking/pause)
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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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int oss_format;
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#ifdef SNDCTL_DSP_RESET
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ioctl(p->audio_fd, SNDCTL_DSP_RESET, NULL);
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#else
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close_device(ao);
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p->audio_fd = open(p->dsp, O_WRONLY);
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if (p->audio_fd < 0) {
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MP_ERR(ao, "Fatal error: *** CANNOT "
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"RE-OPEN / RESET AUDIO DEVICE *** %s\n", strerror(errno));
|
|
return;
|
|
}
|
|
|
|
#if defined(FD_CLOEXEC) && defined(F_SETFD)
|
|
fcntl(p->audio_fd, F_SETFD, FD_CLOEXEC);
|
|
#endif
|
|
#endif
|
|
|
|
oss_format = format2oss(ao->format);
|
|
if (AF_FORMAT_IS_AC3(ao->format))
|
|
ioctl(p->audio_fd, SNDCTL_DSP_SPEED, &ao->samplerate);
|
|
ioctl(p->audio_fd, SNDCTL_DSP_SETFMT, &oss_format);
|
|
if (!AF_FORMAT_IS_AC3(ao->format)) {
|
|
int c = ao->channels.num;
|
|
if (ao->channels.num > 2)
|
|
ioctl(p->audio_fd, SNDCTL_DSP_CHANNELS, &c);
|
|
else {
|
|
c--;
|
|
ioctl(p->audio_fd, SNDCTL_DSP_STEREO, &c);
|
|
}
|
|
ioctl(p->audio_fd, SNDCTL_DSP_SPEED, &ao->samplerate);
|
|
}
|
|
}
|
|
|
|
// return: how many bytes can be played without blocking
|
|
static int get_space(struct ao *ao)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
int playsize = p->outburst;
|
|
|
|
#ifdef SNDCTL_DSP_GETOSPACE
|
|
if (ioctl(p->audio_fd, SNDCTL_DSP_GETOSPACE, &p->zz) != -1) {
|
|
// calculate exact buffer space:
|
|
playsize = p->zz.fragments * p->zz.fragsize;
|
|
return playsize / ao->sstride;
|
|
}
|
|
#endif
|
|
|
|
// check buffer
|
|
#if HAVE_AUDIO_SELECT
|
|
{
|
|
fd_set rfds;
|
|
struct timeval tv;
|
|
FD_ZERO(&rfds);
|
|
FD_SET(p->audio_fd, &rfds);
|
|
tv.tv_sec = 0;
|
|
tv.tv_usec = 0;
|
|
if (!select(p->audio_fd + 1, NULL, &rfds, NULL, &tv))
|
|
return 0; // not block!
|
|
}
|
|
#endif
|
|
|
|
return p->outburst / ao->sstride;
|
|
}
|
|
|
|
// stop playing, keep buffers (for pause)
|
|
static void audio_pause(struct ao *ao)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
p->prepause_space = get_space(ao) * ao->sstride;
|
|
#ifdef SNDCTL_DSP_RESET
|
|
ioctl(p->audio_fd, SNDCTL_DSP_RESET, NULL);
|
|
#else
|
|
close_device(ao);
|
|
#endif
|
|
}
|
|
|
|
// plays 'len' bytes of 'data'
|
|
// it should round it down to outburst*n
|
|
// return: number of bytes played
|
|
static int play(struct ao *ao, void **data, int samples, int flags)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
int len = samples * ao->sstride;
|
|
if (len == 0)
|
|
return len;
|
|
if (len > p->outburst || !(flags & AOPLAY_FINAL_CHUNK)) {
|
|
len /= p->outburst;
|
|
len *= p->outburst;
|
|
}
|
|
len = write(p->audio_fd, data[0], len);
|
|
return len / ao->sstride;
|
|
}
|
|
|
|
// resume playing, after audio_pause()
|
|
static void audio_resume(struct ao *ao)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
#ifndef SNDCTL_DSP_RESET
|
|
reset(ao);
|
|
#endif
|
|
int fillframes = get_space(ao) - p->prepause_space / ao->sstride;
|
|
if (fillframes > 0)
|
|
ao_play_silence(ao, fillframes);
|
|
}
|
|
|
|
// return: delay in seconds between first and last sample in buffer
|
|
static float get_delay(struct ao *ao)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
/* Calculate how many bytes/second is sent out */
|
|
if (p->audio_delay_method == 2) {
|
|
#ifdef SNDCTL_DSP_GETODELAY
|
|
int r = 0;
|
|
if (ioctl(p->audio_fd, SNDCTL_DSP_GETODELAY, &r) != -1)
|
|
return ((float)r) / (float)ao->bps;
|
|
#endif
|
|
p->audio_delay_method = 1; // fallback if not supported
|
|
}
|
|
if (p->audio_delay_method == 1) {
|
|
// SNDCTL_DSP_GETOSPACE
|
|
if (ioctl(p->audio_fd, SNDCTL_DSP_GETOSPACE, &p->zz) != -1) {
|
|
return ((float)(p->buffersize -
|
|
p->zz.bytes)) / (float)ao->bps;
|
|
}
|
|
p->audio_delay_method = 0; // fallback if not supported
|
|
}
|
|
return ((float)p->buffersize) / (float)ao->bps;
|
|
}
|
|
|
|
#define OPT_BASE_STRUCT struct priv
|
|
|
|
const struct ao_driver audio_out_oss = {
|
|
.description = "OSS/ioctl audio output",
|
|
.name = "oss",
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.control = control,
|
|
.get_space = get_space,
|
|
.play = play,
|
|
.get_delay = get_delay,
|
|
.pause = audio_pause,
|
|
.resume = audio_resume,
|
|
.reset = reset,
|
|
.drain = drain,
|
|
.priv_size = sizeof(struct priv),
|
|
.priv_defaults = &(const struct priv) {
|
|
.audio_fd = -1,
|
|
.audio_delay_method = 2,
|
|
.buffersize = -1,
|
|
.outburst = 512,
|
|
.oss_mixer_channel = SOUND_MIXER_PCM,
|
|
|
|
.dsp = PATH_DEV_DSP,
|
|
.oss_mixer_device = PATH_DEV_MIXER,
|
|
},
|
|
.options = (const struct m_option[]) {
|
|
OPT_STRING("device", dsp, 0),
|
|
OPT_STRING("mixer-device", oss_mixer_device, 0),
|
|
OPT_STRING("mixer-channel", cfg_oss_mixer_channel, 0),
|
|
{0}
|
|
},
|
|
};
|