mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-21 18:50:50 +01:00
sound examples: Delete stale ossinit.h file
Fixes: 3decd659a788("sound examples: Simplify audio example")
Sponsored by: The FreeBSD Foundation
MFC after: 2 days
This commit is contained in:
Christos Margiolis
parent
c3516c6533
commit
7ae4868a9a
@ -1,262 +0,0 @@
|
||||
/*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*
|
||||
* Copyright (c) 2021 Goran Mekić
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/soundcard.h>
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
|
||||
|
||||
#ifndef SAMPLE_SIZE
|
||||
#define SAMPLE_SIZE 16
|
||||
#endif
|
||||
|
||||
/* Format can be unsigned, in which case replace S with U */
|
||||
#if SAMPLE_SIZE == 32
|
||||
typedef int32_t sample_t;
|
||||
int format = AFMT_S32_NE; /* Signed 32bit native endian format */
|
||||
#elif SAMPLE_SIZE == 16
|
||||
typedef int16_t sample_t;
|
||||
int format = AFMT_S16_NE; /* Signed 16bit native endian format */
|
||||
#elif SAMPLE_SIZE == 8
|
||||
typedef int8_t sample_t;
|
||||
int format = AFMT_S8_NE; /* Signed 8bit native endian format */
|
||||
#else
|
||||
#error Unsupported sample format!
|
||||
typedef int32_t sample_t;
|
||||
int format = AFMT_S32_NE; /* Not a real value, just silencing
|
||||
* compiler errors */
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* Minimal configuration for OSS
|
||||
* For real world applications, this structure will probably contain many
|
||||
* more fields
|
||||
*/
|
||||
typedef struct config {
|
||||
char *device;
|
||||
int channels;
|
||||
int fd;
|
||||
int format;
|
||||
int frag;
|
||||
int sample_count;
|
||||
int sample_rate;
|
||||
int sample_size;
|
||||
int chsamples;
|
||||
int mmap;
|
||||
oss_audioinfo audio_info;
|
||||
audio_buf_info buffer_info;
|
||||
} config_t;
|
||||
|
||||
|
||||
/*
|
||||
* Error state is indicated by value=-1 in which case application exits
|
||||
* with error
|
||||
*/
|
||||
static inline void
|
||||
check_error(const int value, const char *message)
|
||||
{
|
||||
if (value == -1) {
|
||||
fprintf(stderr, "OSS error: %s %s\n", message, strerror(errno));
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* Calculate frag by giving it minimal size of buffer */
|
||||
static inline int
|
||||
size2frag(int x)
|
||||
{
|
||||
int frag = 0;
|
||||
|
||||
while ((1 << frag) < x) {
|
||||
++frag;
|
||||
}
|
||||
return frag;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Split input buffer into channels. Input buffer is in interleaved format
|
||||
* which means if we have 2 channels (L and R), this is what the buffer of
|
||||
* 8 samples would contain: L,R,L,R,L,R,L,R. The result are two channels
|
||||
* containing: L,L,L,L and R,R,R,R.
|
||||
*/
|
||||
void
|
||||
oss_split(config_t *config, sample_t *input, sample_t *output)
|
||||
{
|
||||
int channel;
|
||||
int index;
|
||||
|
||||
for (int i = 0; i < config->sample_count; ++i) {
|
||||
channel = i % config->channels;
|
||||
index = i / config->channels;
|
||||
output[channel * index] = input[i];
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Convert channels into interleaved format and place it in output
|
||||
* buffer
|
||||
*/
|
||||
void
|
||||
oss_merge(config_t *config, sample_t *input, sample_t *output)
|
||||
{
|
||||
for (int channel = 0; channel < config->channels; ++channel) {
|
||||
for (int index = 0; index < config->chsamples; ++index) {
|
||||
output[index * config->channels + channel] = input[channel * index];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
oss_init(config_t *config)
|
||||
{
|
||||
int error;
|
||||
int tmp;
|
||||
|
||||
/* Open the device for read and write */
|
||||
config->fd = open(config->device, O_RDWR);
|
||||
check_error(config->fd, "open");
|
||||
|
||||
/* Get device information */
|
||||
config->audio_info.dev = -1;
|
||||
error = ioctl(config->fd, SNDCTL_ENGINEINFO, &(config->audio_info));
|
||||
check_error(error, "SNDCTL_ENGINEINFO");
|
||||
printf("min_channels: %d\n", config->audio_info.min_channels);
|
||||
printf("max_channels: %d\n", config->audio_info.max_channels);
|
||||
printf("latency: %d\n", config->audio_info.latency);
|
||||
printf("handle: %s\n", config->audio_info.handle);
|
||||
if (config->audio_info.min_rate > config->sample_rate || config->sample_rate > config->audio_info.max_rate) {
|
||||
fprintf(stderr, "%s doesn't support chosen ", config->device);
|
||||
fprintf(stderr, "samplerate of %dHz!\n", config->sample_rate);
|
||||
exit(1);
|
||||
}
|
||||
if (config->channels < 1) {
|
||||
config->channels = config->audio_info.max_channels;
|
||||
}
|
||||
|
||||
/*
|
||||
* If device is going to be used in mmap mode, disable all format
|
||||
* conversions. Official OSS documentation states error code should not be
|
||||
* checked. http://manuals.opensound.com/developer/mmap_test.c.html#LOC10
|
||||
*/
|
||||
if (config->mmap) {
|
||||
tmp = 0;
|
||||
ioctl(config->fd, SNDCTL_DSP_COOKEDMODE, &tmp);
|
||||
}
|
||||
|
||||
/*
|
||||
* Set number of channels. If number of channels is chosen to the value
|
||||
* near the one wanted, save it in config
|
||||
*/
|
||||
tmp = config->channels;
|
||||
error = ioctl(config->fd, SNDCTL_DSP_CHANNELS, &tmp);
|
||||
check_error(error, "SNDCTL_DSP_CHANNELS");
|
||||
if (tmp != config->channels) { /* or check if tmp is close enough? */
|
||||
fprintf(stderr, "%s doesn't support chosen ", config->device);
|
||||
fprintf(stderr, "channel count of %d", config->channels);
|
||||
fprintf(stderr, ", set to %d!\n", tmp);
|
||||
}
|
||||
config->channels = tmp;
|
||||
|
||||
/* Set format, or bit size: 8, 16, 24 or 32 bit sample */
|
||||
tmp = config->format;
|
||||
error = ioctl(config->fd, SNDCTL_DSP_SETFMT, &tmp);
|
||||
check_error(error, "SNDCTL_DSP_SETFMT");
|
||||
if (tmp != config->format) {
|
||||
fprintf(stderr, "%s doesn't support chosen sample format!\n", config->device);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/* Most common values for samplerate (in kHz): 44.1, 48, 88.2, 96 */
|
||||
tmp = config->sample_rate;
|
||||
error = ioctl(config->fd, SNDCTL_DSP_SPEED, &tmp);
|
||||
check_error(error, "SNDCTL_DSP_SPEED");
|
||||
|
||||
/* Get and check device capabilities */
|
||||
error = ioctl(config->fd, SNDCTL_DSP_GETCAPS, &(config->audio_info.caps));
|
||||
check_error(error, "SNDCTL_DSP_GETCAPS");
|
||||
if (!(config->audio_info.caps & PCM_CAP_DUPLEX)) {
|
||||
fprintf(stderr, "Device doesn't support full duplex!\n");
|
||||
exit(1);
|
||||
}
|
||||
if (config->mmap) {
|
||||
if (!(config->audio_info.caps & PCM_CAP_TRIGGER)) {
|
||||
fprintf(stderr, "Device doesn't support triggering!\n");
|
||||
exit(1);
|
||||
}
|
||||
if (!(config->audio_info.caps & PCM_CAP_MMAP)) {
|
||||
fprintf(stderr, "Device doesn't support mmap mode!\n");
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* If desired frag is smaller than minimum, based on number of channels
|
||||
* and format (size in bits: 8, 16, 24, 32), set that as frag. Buffer size
|
||||
* is 2^frag, but the real size of the buffer will be read when the
|
||||
* configuration of the device is successful
|
||||
*/
|
||||
int min_frag = size2frag(config->sample_size * config->channels);
|
||||
|
||||
if (config->frag < min_frag) {
|
||||
config->frag = min_frag;
|
||||
}
|
||||
|
||||
/*
|
||||
* Allocate buffer in fragments. Total buffer will be split in number
|
||||
* of fragments (2 by default)
|
||||
*/
|
||||
if (config->buffer_info.fragments < 0) {
|
||||
config->buffer_info.fragments = 2;
|
||||
}
|
||||
tmp = ((config->buffer_info.fragments) << 16) | config->frag;
|
||||
error = ioctl(config->fd, SNDCTL_DSP_SETFRAGMENT, &tmp);
|
||||
check_error(error, "SNDCTL_DSP_SETFRAGMENT");
|
||||
|
||||
/* When all is set and ready to go, get the size of buffer */
|
||||
error = ioctl(config->fd, SNDCTL_DSP_GETOSPACE, &(config->buffer_info));
|
||||
check_error(error, "SNDCTL_DSP_GETOSPACE");
|
||||
if (config->buffer_info.bytes < 1) {
|
||||
fprintf(
|
||||
stderr,
|
||||
"OSS buffer error: buffer size can not be %d\n",
|
||||
config->buffer_info.bytes
|
||||
);
|
||||
exit(1);
|
||||
}
|
||||
config->sample_count = config->buffer_info.bytes / config->sample_size;
|
||||
config->chsamples = config->sample_count / config->channels;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user