mirror of https://github.com/mpv-player/mpv
573 lines
16 KiB
C
573 lines
16 KiB
C
/*
|
|
* OSS audio output driver
|
|
*
|
|
* This file is part of MPlayer.
|
|
*
|
|
* Support for >2 output channels added 2001-11-25
|
|
* - Steve Davies <steve@daviesfam.org>
|
|
*
|
|
* MPlayer is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* MPlayer is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <sys/ioctl.h>
|
|
#include <unistd.h>
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
#include "config.h"
|
|
#include "mpvcore/options.h"
|
|
#include "mpvcore/mp_msg.h"
|
|
#include "audio/mixer.h"
|
|
|
|
#ifdef HAVE_SYS_SOUNDCARD_H
|
|
#include <sys/soundcard.h>
|
|
#else
|
|
#ifdef HAVE_SOUNDCARD_H
|
|
#include <soundcard.h>
|
|
#endif
|
|
#endif
|
|
|
|
#include "audio/format.h"
|
|
|
|
#include "ao.h"
|
|
|
|
struct priv {
|
|
int audio_fd;
|
|
int prepause_space;
|
|
int oss_mixer_channel;
|
|
audio_buf_info zz;
|
|
int audio_delay_method;
|
|
int buffersize;
|
|
int outburst;
|
|
|
|
char *dsp;
|
|
char *oss_mixer_device;
|
|
char *cfg_oss_mixer_channel;
|
|
};
|
|
|
|
static const char *mixer_channels[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
|
|
|
|
static int format_table[][2] = {
|
|
{AFMT_U8, AF_FORMAT_U8},
|
|
{AFMT_S8, AF_FORMAT_S8},
|
|
{AFMT_U16_LE, AF_FORMAT_U16_LE},
|
|
{AFMT_U16_BE, AF_FORMAT_U16_BE},
|
|
{AFMT_S16_LE, AF_FORMAT_S16_LE},
|
|
{AFMT_S16_BE, AF_FORMAT_S16_BE},
|
|
#ifdef AFMT_S24_PACKED
|
|
{AFMT_S24_PACKED, AF_FORMAT_S24_LE},
|
|
#endif
|
|
#ifdef AFMT_U32_LE
|
|
{AFMT_U32_LE, AF_FORMAT_U32_LE},
|
|
#endif
|
|
#ifdef AFMT_U32_BE
|
|
{AFMT_U32_BE, AF_FORMAT_U32_BE},
|
|
#endif
|
|
#ifdef AFMT_S32_LE
|
|
{AFMT_S32_LE, AF_FORMAT_S32_LE},
|
|
#endif
|
|
#ifdef AFMT_S32_BE
|
|
{AFMT_S32_BE, AF_FORMAT_S32_BE},
|
|
#endif
|
|
#ifdef AFMT_FLOAT
|
|
{AFMT_FLOAT, AF_FORMAT_FLOAT_NE},
|
|
#endif
|
|
// SPECIALS
|
|
#ifdef AFMT_MPEG
|
|
{AFMT_MPEG, AF_FORMAT_MPEG2},
|
|
#endif
|
|
#ifdef AFMT_AC3
|
|
{AFMT_AC3, AF_FORMAT_AC3_NE},
|
|
#endif
|
|
{-1, -1}
|
|
};
|
|
|
|
static int format2oss(int format)
|
|
{
|
|
for (int n = 0; format_table[n][0] != -1; n++) {
|
|
if (format_table[n][1] == format)
|
|
return format_table[n][0];
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int oss2format(int format)
|
|
{
|
|
for (int n = 0; format_table[n][0] != -1; n++) {
|
|
if (format_table[n][0] == format)
|
|
return format_table[n][1];
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
#ifdef SNDCTL_DSP_GETPLAYVOL
|
|
static int volume_oss4(struct ao *ao, ao_control_vol_t *vol, int cmd)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
int v;
|
|
|
|
if (p->audio_fd < 0)
|
|
return CONTROL_ERROR;
|
|
|
|
if (cmd == AOCONTROL_GET_VOLUME) {
|
|
if (ioctl(p->audio_fd, SNDCTL_DSP_GETPLAYVOL, &v) == -1)
|
|
return CONTROL_ERROR;
|
|
vol->right = (v & 0xff00) >> 8;
|
|
vol->left = v & 0x00ff;
|
|
return CONTROL_OK;
|
|
} else if (cmd == AOCONTROL_SET_VOLUME) {
|
|
v = ((int) vol->right << 8) | (int) vol->left;
|
|
if (ioctl(p->audio_fd, SNDCTL_DSP_SETPLAYVOL, &v) == -1)
|
|
return CONTROL_ERROR;
|
|
return CONTROL_OK;
|
|
} else
|
|
return CONTROL_UNKNOWN;
|
|
}
|
|
#endif
|
|
|
|
// to set/get/query special features/parameters
|
|
static int control(struct ao *ao, enum aocontrol cmd, void *arg)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
switch (cmd) {
|
|
case AOCONTROL_GET_VOLUME:
|
|
case AOCONTROL_SET_VOLUME:
|
|
{
|
|
ao_control_vol_t *vol = (ao_control_vol_t *)arg;
|
|
int fd, v, devs;
|
|
|
|
#ifdef SNDCTL_DSP_GETPLAYVOL
|
|
// Try OSS4 first
|
|
if (volume_oss4(ao, vol, cmd) == CONTROL_OK)
|
|
return CONTROL_OK;
|
|
#endif
|
|
|
|
if (AF_FORMAT_IS_AC3(ao->format))
|
|
return CONTROL_TRUE;
|
|
|
|
if ((fd = open(p->oss_mixer_device, O_RDONLY)) != -1) {
|
|
ioctl(fd, SOUND_MIXER_READ_DEVMASK, &devs);
|
|
if (devs & (1 << p->oss_mixer_channel)) {
|
|
if (cmd == AOCONTROL_GET_VOLUME) {
|
|
ioctl(fd, MIXER_READ(p->oss_mixer_channel), &v);
|
|
vol->right = (v & 0xFF00) >> 8;
|
|
vol->left = v & 0x00FF;
|
|
} else {
|
|
v = ((int)vol->right << 8) | (int)vol->left;
|
|
ioctl(fd, MIXER_WRITE(p->oss_mixer_channel), &v);
|
|
}
|
|
} else {
|
|
close(fd);
|
|
return CONTROL_ERROR;
|
|
}
|
|
close(fd);
|
|
return CONTROL_OK;
|
|
}
|
|
}
|
|
return CONTROL_ERROR;
|
|
}
|
|
return CONTROL_UNKNOWN;
|
|
}
|
|
|
|
// open & setup audio device
|
|
// return: 0=success -1=fail
|
|
static int init(struct ao *ao)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
int oss_format;
|
|
|
|
const char *mchan = NULL;
|
|
if (p->cfg_oss_mixer_channel && p->cfg_oss_mixer_channel[0])
|
|
mchan = p->cfg_oss_mixer_channel;
|
|
|
|
MP_VERBOSE(ao, "%d Hz %d chans %s\n", ao->samplerate,
|
|
ao->channels.num, af_fmt2str_short(ao->format));
|
|
|
|
if (mchan) {
|
|
int fd, devs, i;
|
|
|
|
if ((fd = open(p->oss_mixer_device, O_RDONLY)) == -1) {
|
|
MP_ERR(ao, "Can't open mixer device %s: %s\n",
|
|
p->oss_mixer_device, strerror(errno));
|
|
} else {
|
|
ioctl(fd, SOUND_MIXER_READ_DEVMASK, &devs);
|
|
close(fd);
|
|
|
|
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
|
|
if (!strcasecmp(mixer_channels[i], mchan)) {
|
|
if (!(devs & (1 << i))) {
|
|
MP_ERR(ao, "Audio card mixer does not have "
|
|
"channel '%s', using default.\n", mchan);
|
|
i = SOUND_MIXER_NRDEVICES + 1;
|
|
break;
|
|
}
|
|
p->oss_mixer_channel = i;
|
|
break;
|
|
}
|
|
}
|
|
if (i == SOUND_MIXER_NRDEVICES) {
|
|
MP_ERR(ao, "Audio card mixer does not have "
|
|
"channel '%s', using default.\n", mchan);
|
|
}
|
|
}
|
|
} else {
|
|
p->oss_mixer_channel = SOUND_MIXER_PCM;
|
|
}
|
|
|
|
MP_VERBOSE(ao, "using '%s' dsp device\n", p->dsp);
|
|
MP_VERBOSE(ao, "using '%s' mixer device\n", p->oss_mixer_device);
|
|
MP_VERBOSE(ao, "using '%s' mixer device\n", mixer_channels[p->oss_mixer_channel]);
|
|
|
|
#ifdef __linux__
|
|
p->audio_fd = open(p->dsp, O_WRONLY | O_NONBLOCK);
|
|
#else
|
|
p->audio_fd = open(p->dsp, O_WRONLY);
|
|
#endif
|
|
if (p->audio_fd < 0) {
|
|
MP_ERR(ao, "Can't open audio device %s: %s\n", p->dsp, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
#ifdef __linux__
|
|
/* Remove the non-blocking flag */
|
|
if (fcntl(p->audio_fd, F_SETFL, 0) < 0) {
|
|
MP_ERR(ao, "Can't make file descriptor blocking: %s\n", strerror(errno));
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
#if defined(FD_CLOEXEC) && defined(F_SETFD)
|
|
fcntl(p->audio_fd, F_SETFD, FD_CLOEXEC);
|
|
#endif
|
|
|
|
if (AF_FORMAT_IS_AC3(ao->format)) {
|
|
ioctl(p->audio_fd, SNDCTL_DSP_SPEED, &ao->samplerate);
|
|
}
|
|
|
|
ac3_retry:
|
|
if (AF_FORMAT_IS_AC3(ao->format))
|
|
ao->format = AF_FORMAT_AC3_NE;
|
|
oss_format = format2oss(ao->format);
|
|
if (oss_format == -1) {
|
|
MP_VERBOSE(ao, "Unknown/not supported internal format: %s\n",
|
|
af_fmt2str_short(ao->format));
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
oss_format = AFMT_S16_BE;
|
|
#else
|
|
oss_format = AFMT_S16_LE;
|
|
#endif
|
|
ao->format = AF_FORMAT_S16_NE;
|
|
}
|
|
if (ioctl(p->audio_fd, SNDCTL_DSP_SETFMT, &oss_format) < 0 ||
|
|
oss_format != format2oss(ao->format))
|
|
{
|
|
MP_WARN(ao, "Can't set audio device %s to %s output, trying %s...\n",
|
|
p->dsp, af_fmt2str_short(ao->format),
|
|
af_fmt2str_short(AF_FORMAT_S16_NE));
|
|
ao->format = AF_FORMAT_S16_NE;
|
|
goto ac3_retry;
|
|
}
|
|
|
|
ao->format = oss2format(oss_format);
|
|
if (ao->format == -1) {
|
|
MP_ERR(ao, "Unknown/Unsupported OSS format: %x.\n", oss_format);
|
|
return -1;
|
|
}
|
|
|
|
MP_VERBOSE(ao, "sample format: %s\n", af_fmt2str_short(ao->format));
|
|
|
|
if (!AF_FORMAT_IS_AC3(ao->format)) {
|
|
struct mp_chmap_sel sel = {0};
|
|
mp_chmap_sel_add_alsa_def(&sel);
|
|
if (!ao_chmap_sel_adjust(ao, &sel, &ao->channels))
|
|
return -1;
|
|
int reqchannels = ao->channels.num;
|
|
// We only use SNDCTL_DSP_CHANNELS for >2 channels, in case some drivers don't have it
|
|
if (reqchannels > 2) {
|
|
int nchannels = reqchannels;
|
|
if (ioctl(p->audio_fd, SNDCTL_DSP_CHANNELS, &nchannels) == -1 ||
|
|
nchannels != reqchannels)
|
|
{
|
|
MP_ERR(ao, "Failed to set audio device to %d channels.\n",
|
|
reqchannels);
|
|
return -1;
|
|
}
|
|
} else {
|
|
int c = reqchannels - 1;
|
|
if (ioctl(p->audio_fd, SNDCTL_DSP_STEREO, &c) == -1) {
|
|
MP_ERR(ao, "Failed to set audio device to %d channels.\n",
|
|
reqchannels);
|
|
return -1;
|
|
}
|
|
if (!ao_chmap_sel_get_def(ao, &sel, &ao->channels, c + 1))
|
|
return -1;
|
|
}
|
|
MP_VERBOSE(ao, "using %d channels (requested: %d)\n",
|
|
ao->channels.num, reqchannels);
|
|
// set rate
|
|
ioctl(p->audio_fd, SNDCTL_DSP_SPEED, &ao->samplerate);
|
|
MP_VERBOSE(ao, "using %d Hz samplerate\n", ao->samplerate);
|
|
}
|
|
|
|
if (ioctl(p->audio_fd, SNDCTL_DSP_GETOSPACE, &p->zz) == -1) {
|
|
int r = 0;
|
|
MP_WARN(ao, "driver doesn't support SNDCTL_DSP_GETOSPACE\n");
|
|
if (ioctl(p->audio_fd, SNDCTL_DSP_GETBLKSIZE, &r) == -1)
|
|
MP_VERBOSE(ao, "%d bytes/frag (config.h)\n", p->outburst);
|
|
else {
|
|
p->outburst = r;
|
|
MP_VERBOSE(ao, "%d bytes/frag (GETBLKSIZE)\n", p->outburst);
|
|
}
|
|
} else {
|
|
MP_VERBOSE(ao, "frags: %3d/%d (%d bytes/frag) free: %6d\n",
|
|
p->zz.fragments, p->zz.fragstotal, p->zz.fragsize, p->zz.bytes);
|
|
p->buffersize = p->zz.bytes;
|
|
p->outburst = p->zz.fragsize;
|
|
}
|
|
|
|
if (p->buffersize == -1) {
|
|
// Measuring buffer size:
|
|
void *data;
|
|
p->buffersize = 0;
|
|
#ifdef HAVE_AUDIO_SELECT
|
|
data = malloc(p->outburst);
|
|
memset(data, 0, p->outburst);
|
|
while (p->buffersize < 0x40000) {
|
|
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))
|
|
break;
|
|
write(p->audio_fd, data, p->outburst);
|
|
p->buffersize += p->outburst;
|
|
}
|
|
free(data);
|
|
if (p->buffersize == 0) {
|
|
MP_ERR(ao, "*** Your audio driver DOES NOT support select() ***\n");
|
|
MP_ERR(ao, "Recompile mpv with #undef HAVE_AUDIO_SELECT in config.h!\n");
|
|
return -1;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
ao->bps = ao->channels.num * (af_fmt2bits(ao->format) / 8);
|
|
p->outburst -= p->outburst % ao->bps; // round down
|
|
ao->bps *= ao->samplerate;
|
|
|
|
return 0;
|
|
}
|
|
|
|
// close audio device
|
|
static void uninit(struct ao *ao, bool immed)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
if (p->audio_fd == -1)
|
|
return;
|
|
#ifdef SNDCTL_DSP_SYNC
|
|
// to get the buffer played
|
|
if (!immed)
|
|
ioctl(p->audio_fd, SNDCTL_DSP_SYNC, NULL);
|
|
#endif
|
|
#ifdef SNDCTL_DSP_RESET
|
|
if (immed)
|
|
ioctl(p->audio_fd, SNDCTL_DSP_RESET, NULL);
|
|
#endif
|
|
close(p->audio_fd);
|
|
p->audio_fd = -1;
|
|
}
|
|
|
|
static void close_device(struct ao *ao)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
#ifdef SNDCTL_DSP_RESET
|
|
ioctl(p->audio_fd, SNDCTL_DSP_RESET, NULL);
|
|
#endif
|
|
close(p->audio_fd);
|
|
p->audio_fd = -1;
|
|
}
|
|
|
|
// stop playing and empty buffers (for seeking/pause)
|
|
static void reset(struct ao *ao)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
int oss_format;
|
|
close_device(ao);
|
|
p->audio_fd = open(p->dsp, O_WRONLY);
|
|
if (p->audio_fd < 0) {
|
|
MP_ERR(ao, "Fatal error: *** CANNOT "
|
|
"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
|
|
|
|
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)) {
|
|
if (ao->channels.num > 2)
|
|
ioctl(p->audio_fd, SNDCTL_DSP_CHANNELS, &ao->channels.num);
|
|
else {
|
|
int c = ao->channels.num - 1;
|
|
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;
|
|
}
|
|
#endif
|
|
|
|
// check buffer
|
|
#ifdef 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;
|
|
}
|
|
|
|
// stop playing, keep buffers (for pause)
|
|
static void audio_pause(struct ao *ao)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
p->prepause_space = get_space(ao);
|
|
close_device(ao);
|
|
}
|
|
|
|
// 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 len, int flags)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
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, len);
|
|
return len;
|
|
}
|
|
|
|
// resume playing, after audio_pause()
|
|
static void audio_resume(struct ao *ao)
|
|
{
|
|
struct priv *p = ao->priv;
|
|
int fillcnt;
|
|
reset(ao);
|
|
fillcnt = get_space(ao) - p->prepause_space;
|
|
if (fillcnt > 0 && !(ao->format & AF_FORMAT_SPECIAL_MASK)) {
|
|
void *silence = calloc(fillcnt, 1);
|
|
play(ao, silence, fillcnt, 0);
|
|
free(silence);
|
|
}
|
|
}
|
|
|
|
// 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 = {
|
|
.info = &(const struct ao_info) {
|
|
"OSS/ioctl audio output",
|
|
"oss",
|
|
"A'rpi",
|
|
""
|
|
},
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.control = control,
|
|
.get_space = get_space,
|
|
.play = play,
|
|
.get_delay = get_delay,
|
|
.pause = audio_pause,
|
|
.resume = audio_resume,
|
|
.reset = reset,
|
|
.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}
|
|
},
|
|
};
|