/*
* Copyright 2008-2013 Various Authors
* Copyright 2004-2005 Timo Hirvonen
*
* This program 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.
*
* This program 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 this program; if not, see .
*/
#include "../op.h"
#include "../sf.h"
#include "../xmalloc.h"
#include "../debug.h"
#include "../utils.h"
#if defined(__OpenBSD__)
#include
#else
#include
#endif
#include
#include
#include
#include
#include
static sample_format_t oss_sf;
static int oss_fd = -1;
/* configuration */
static char *oss_dsp_device = NULL;
static int oss_close(void);
static int oss_reset(void)
{
if (fcntl(oss_fd, SNDCTL_DSP_RESET, 0) == -1) {
return -1;
}
return 0;
}
#if defined(__linux__)
/* defined only in OSSv4, but seem to work in OSSv3 (Linux) */
#ifndef AFMT_S32_LE
#define AFMT_S32_LE 0x00001000
#endif
#ifndef AFMT_S32_BE
#define AFMT_S32_BE 0x00002000
#endif
#ifndef AFMT_S24_PACKED
#define AFMT_S24_PACKED 0x00040000
#endif
#endif
struct oss_fmt {
int fmt, bits, sig, be;
};
static struct oss_fmt oss_fmts[] = {
{ AFMT_S16_BE, 16, 1, 1 },
{ AFMT_S16_LE, 16, 1, 0 },
#ifdef AFMT_S24_PACKED
{ AFMT_S24_PACKED, 24, 1, 0 },
#endif
#ifdef AFMT_S24_BE
{ AFMT_S24_BE, 24, 1, 1 },
#endif
#ifdef AFMT_S24_LE
{ AFMT_S24_LE, 24, 1, 0 },
#endif
#ifdef AFMT_S32_BE
{ AFMT_S32_BE, 32, 1, 1 },
#endif
#ifdef AFMT_S32_LE
{ AFMT_S32_LE, 32, 1, 0 },
#endif
{ AFMT_U16_BE, 16, 0, 1 },
{ AFMT_U16_LE, 16, 0, 0 },
#ifdef AFMT_U24_BE
{ AFMT_U24_BE, 24, 0, 1 },
#endif
#ifdef AFMT_U24_LE
{ AFMT_U24_LE, 24, 0, 0 },
#endif
#ifdef AFMT_U32_BE
{ AFMT_U32_BE, 32, 0, 1 },
#endif
#ifdef AFMT_U32_LE
{ AFMT_U32_LE, 32, 0, 0 },
#endif
{ AFMT_S8, 8, 1, 0 },
{ AFMT_S8, 8, 1, 1 },
{ AFMT_U8, 8, 0, 0 },
{ AFMT_U8, 8, 0, 1 },
};
static int oss_set_sf(sample_format_t sf)
{
int found, tmp, log2_fragment_size, nr_fragments, bytes_per_second;
size_t i;
oss_reset();
oss_sf = sf;
#ifdef SNDCTL_DSP_CHANNELS
tmp = sf_get_channels(oss_sf);
if (ioctl(oss_fd, SNDCTL_DSP_CHANNELS, &tmp) == -1)
return -1;
#else
tmp = sf_get_channels(oss_sf) - 1;
if (ioctl(oss_fd, SNDCTL_DSP_STEREO, &tmp) == -1)
return -1;
#endif
found = 0;
for (i = 0; i < N_ELEMENTS(oss_fmts); i++) {
if (sf_get_bits(oss_sf) == oss_fmts[i].bits &&
sf_get_signed(oss_sf) == oss_fmts[i].sig &&
sf_get_bigendian(oss_sf) == oss_fmts[i].be) {
found = 1;
tmp = oss_fmts[i].fmt;
break;
}
}
if (!found) {
d_print("unsupported sample format: %c%u_%s\n",
sf_get_signed(oss_sf) ? 'S' : 'U', sf_get_bits(oss_sf),
sf_get_bigendian(oss_sf) ? "BE" : "LE");
return -1;
}
if (ioctl(oss_fd, SNDCTL_DSP_SAMPLESIZE, &tmp) == -1)
return -1;
tmp = sf_get_rate(oss_sf);
if (ioctl(oss_fd, SNDCTL_DSP_SPEED, &tmp) == -1)
return -1;
bytes_per_second = sf_get_second_size(oss_sf);
log2_fragment_size = 0;
while (1 << log2_fragment_size < bytes_per_second / 25)
log2_fragment_size++;
log2_fragment_size--;
nr_fragments = 32;
/* bits 0..15 = size of fragment, 16..31 = log2(number of fragments) */
tmp = (nr_fragments << 16) + log2_fragment_size;
if (ioctl(oss_fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1)
return -1;
return 0;
}
static int oss_device_exists(const char *device)
{
struct stat s;
if (stat(device, &s))
return 0;
return 1;
}
static int oss_init(void)
{
const char *new_dsp_dev = "/dev/sound/dsp";
const char *dsp_dev = "/dev/dsp";
if (oss_dsp_device) {
if (oss_device_exists(oss_dsp_device))
return 0;
free(oss_dsp_device);
oss_dsp_device = NULL;
return -1;
}
if (oss_device_exists(new_dsp_dev)) {
oss_dsp_device = xstrdup(new_dsp_dev);
return 0;
}
if (oss_device_exists(dsp_dev)) {
oss_dsp_device = xstrdup(dsp_dev);
return 0;
}
return -1;
}
static int oss_exit(void)
{
free(oss_dsp_device);
oss_dsp_device = NULL;
return 0;
}
static int oss_open(sample_format_t sf, const channel_position_t *channel_map)
{
int oss_version = 0;
oss_fd = open(oss_dsp_device, O_WRONLY);
if (oss_fd == -1)
return -1;
ioctl(oss_fd, OSS_GETVERSION, &oss_version);
d_print("oss version: %#08x\n", oss_version);
if (oss_set_sf(sf) == -1) {
oss_close();
return -1;
}
return 0;
}
static int oss_close(void)
{
close(oss_fd);
oss_fd = -1;
return 0;
}
static int oss_write(const char *buffer, int count)
{
int rc;
count -= count % sf_get_frame_size(oss_sf);
rc = write(oss_fd, buffer, count);
return rc;
}
static int oss_pause(void)
{
if (ioctl(oss_fd, SNDCTL_DSP_POST, NULL) == -1)
return -1;
return 0;
}
static int oss_unpause(void)
{
return 0;
}
static int oss_buffer_space(void)
{
audio_buf_info info;
int space;
if (ioctl(oss_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
return -1;
space = (info.fragments - 1) * info.fragsize;
return space;
}
static int op_oss_set_device(const char *val)
{
free(oss_dsp_device);
oss_dsp_device = xstrdup(val);
return 0;
}
static int op_oss_get_device(char **val)
{
if (oss_dsp_device)
*val = xstrdup(oss_dsp_device);
return 0;
}
const struct output_plugin_ops op_pcm_ops = {
.init = oss_init,
.exit = oss_exit,
.open = oss_open,
.close = oss_close,
.write = oss_write,
.pause = oss_pause,
.unpause = oss_unpause,
.buffer_space = oss_buffer_space,
};
const struct output_plugin_opt op_pcm_options[] = {
OPT(op_oss, device),
{ NULL },
};
const int op_priority = 1;
const unsigned op_abi_version = OP_ABI_VERSION;