git: 7ae4868a9a1a - main - sound examples: Delete stale ossinit.h file
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Date: Sat, 24 Aug 2024 12:16:37 UTC
The branch main has been updated by christos:
URL: https://cgit.FreeBSD.org/src/commit/?id=7ae4868a9a1ad255e03529f5872c78f14f215f25
commit 7ae4868a9a1ad255e03529f5872c78f14f215f25
Author: Christos Margiolis <christos@FreeBSD.org>
AuthorDate: 2024-08-24 12:16:21 +0000
Commit: Christos Margiolis <christos@FreeBSD.org>
CommitDate: 2024-08-24 12:16:21 +0000
sound examples: Delete stale ossinit.h file
Fixes: 3decd659a788("sound examples: Simplify audio example")
Sponsored by: The FreeBSD Foundation
MFC after: 2 days
---
share/examples/sound/oss/ossinit.h | 262 -------------------------------------
1 file changed, 262 deletions(-)
diff --git a/share/examples/sound/oss/ossinit.h b/share/examples/sound/oss/ossinit.h
deleted file mode 100644
index 83920712286d..000000000000
--- a/share/examples/sound/oss/ossinit.h
+++ /dev/null
@@ -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;
-}