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authorMax Kellermann <max@duempel.org>2013-01-29 14:32:32 +0100
committerMax Kellermann <max@duempel.org>2013-01-29 14:32:32 +0100
commit26a9ce7b2927f2fc79af46c3152fbc41ee602197 (patch)
tree6510001270201b23f8e2f342940c70f5ea287adb /src/output/oss_output_plugin.c
parent76417d44464248949e7843eee0d5338a8e0a22ac (diff)
downloadmpd-26a9ce7b2927f2fc79af46c3152fbc41ee602197.tar.gz
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output/{alsa,oss}: convert to C++
Diffstat (limited to 'src/output/oss_output_plugin.c')
-rw-r--r--src/output/oss_output_plugin.c788
1 files changed, 0 insertions, 788 deletions
diff --git a/src/output/oss_output_plugin.c b/src/output/oss_output_plugin.c
deleted file mode 100644
index e366a4537..000000000
--- a/src/output/oss_output_plugin.c
+++ /dev/null
@@ -1,788 +0,0 @@
-/*
- * Copyright (C) 2003-2011 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * 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, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "config.h"
-#include "oss_output_plugin.h"
-#include "output_api.h"
-#include "mixer_list.h"
-#include "fd_util.h"
-#include "glib_compat.h"
-
-#include <glib.h>
-
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <assert.h>
-
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN "oss"
-
-#if defined(__OpenBSD__) || defined(__NetBSD__)
-# include <soundcard.h>
-#else /* !(defined(__OpenBSD__) || defined(__NetBSD__) */
-# include <sys/soundcard.h>
-#endif /* !(defined(__OpenBSD__) || defined(__NetBSD__) */
-
-/* We got bug reports from FreeBSD users who said that the two 24 bit
- formats generate white noise on FreeBSD, but 32 bit works. This is
- a workaround until we know what exactly is expected by the kernel
- audio drivers. */
-#ifndef __linux__
-#undef AFMT_S24_PACKED
-#undef AFMT_S24_NE
-#endif
-
-#ifdef AFMT_S24_PACKED
-#include "pcm_export.h"
-#endif
-
-struct oss_data {
- struct audio_output base;
-
-#ifdef AFMT_S24_PACKED
- struct pcm_export_state export;
-#endif
-
- int fd;
- const char *device;
-
- /**
- * The current input audio format. This is needed to reopen
- * the device after cancel().
- */
- struct audio_format audio_format;
-
- /**
- * The current OSS audio format. This is needed to reopen the
- * device after cancel().
- */
- int oss_format;
-};
-
-/**
- * The quark used for GError.domain.
- */
-static inline GQuark
-oss_output_quark(void)
-{
- return g_quark_from_static_string("oss_output");
-}
-
-static struct oss_data *
-oss_data_new(void)
-{
- struct oss_data *ret = g_new(struct oss_data, 1);
-
- ret->device = NULL;
- ret->fd = -1;
-
- return ret;
-}
-
-static void
-oss_data_free(struct oss_data *od)
-{
- g_free(od);
-}
-
-enum oss_stat {
- OSS_STAT_NO_ERROR = 0,
- OSS_STAT_NOT_CHAR_DEV = -1,
- OSS_STAT_NO_PERMS = -2,
- OSS_STAT_DOESN_T_EXIST = -3,
- OSS_STAT_OTHER = -4,
-};
-
-static enum oss_stat
-oss_stat_device(const char *device, int *errno_r)
-{
- struct stat st;
-
- if (0 == stat(device, &st)) {
- if (!S_ISCHR(st.st_mode)) {
- return OSS_STAT_NOT_CHAR_DEV;
- }
- } else {
- *errno_r = errno;
-
- switch (errno) {
- case ENOENT:
- case ENOTDIR:
- return OSS_STAT_DOESN_T_EXIST;
- case EACCES:
- return OSS_STAT_NO_PERMS;
- default:
- return OSS_STAT_OTHER;
- }
- }
-
- return OSS_STAT_NO_ERROR;
-}
-
-static const char *default_devices[] = { "/dev/sound/dsp", "/dev/dsp" };
-
-static bool
-oss_output_test_default_device(void)
-{
- int fd, i;
-
- for (i = G_N_ELEMENTS(default_devices); --i >= 0; ) {
- fd = open_cloexec(default_devices[i], O_WRONLY, 0);
-
- if (fd >= 0) {
- close(fd);
- return true;
- }
- g_warning("Error opening OSS device \"%s\": %s\n",
- default_devices[i], g_strerror(errno));
- }
-
- return false;
-}
-
-static struct audio_output *
-oss_open_default(GError **error)
-{
- int i;
- int err[G_N_ELEMENTS(default_devices)];
- enum oss_stat ret[G_N_ELEMENTS(default_devices)];
-
- for (i = G_N_ELEMENTS(default_devices); --i >= 0; ) {
- ret[i] = oss_stat_device(default_devices[i], &err[i]);
- if (ret[i] == OSS_STAT_NO_ERROR) {
- struct oss_data *od = oss_data_new();
- if (!ao_base_init(&od->base, &oss_output_plugin, NULL,
- error)) {
- g_free(od);
- return NULL;
- }
-
- od->device = default_devices[i];
- return &od->base;
- }
- }
-
- for (i = G_N_ELEMENTS(default_devices); --i >= 0; ) {
- const char *dev = default_devices[i];
- switch(ret[i]) {
- case OSS_STAT_NO_ERROR:
- /* never reached */
- break;
- case OSS_STAT_DOESN_T_EXIST:
- g_warning("%s not found\n", dev);
- break;
- case OSS_STAT_NOT_CHAR_DEV:
- g_warning("%s is not a character device\n", dev);
- break;
- case OSS_STAT_NO_PERMS:
- g_warning("%s: permission denied\n", dev);
- break;
- case OSS_STAT_OTHER:
- g_warning("Error accessing %s: %s\n",
- dev, g_strerror(err[i]));
- }
- }
-
- g_set_error(error, oss_output_quark(), 0,
- "error trying to open default OSS device");
- return NULL;
-}
-
-static struct audio_output *
-oss_output_init(const struct config_param *param, GError **error)
-{
- const char *device = config_get_block_string(param, "device", NULL);
- if (device != NULL) {
- struct oss_data *od = oss_data_new();
- if (!ao_base_init(&od->base, &oss_output_plugin, param,
- error)) {
- g_free(od);
- return NULL;
- }
-
- od->device = device;
- return &od->base;
- }
-
- return oss_open_default(error);
-}
-
-static void
-oss_output_finish(struct audio_output *ao)
-{
- struct oss_data *od = (struct oss_data *)ao;
-
- ao_base_finish(&od->base);
- oss_data_free(od);
-}
-
-#ifdef AFMT_S24_PACKED
-
-static bool
-oss_output_enable(struct audio_output *ao, G_GNUC_UNUSED GError **error_r)
-{
- struct oss_data *od = (struct oss_data *)ao;
-
- pcm_export_init(&od->export);
- return true;
-}
-
-static void
-oss_output_disable(struct audio_output *ao)
-{
- struct oss_data *od = (struct oss_data *)ao;
-
- pcm_export_deinit(&od->export);
-}
-
-#endif
-
-static void
-oss_close(struct oss_data *od)
-{
- if (od->fd >= 0)
- close(od->fd);
- od->fd = -1;
-}
-
-/**
- * A tri-state type for oss_try_ioctl().
- */
-enum oss_setup_result {
- SUCCESS,
- ERROR,
- UNSUPPORTED,
-};
-
-/**
- * Invoke an ioctl on the OSS file descriptor. On success, SUCCESS is
- * returned. If the parameter is not supported, UNSUPPORTED is
- * returned. Any other failure returns ERROR and allocates a GError.
- */
-static enum oss_setup_result
-oss_try_ioctl_r(int fd, unsigned long request, int *value_r,
- const char *msg, GError **error_r)
-{
- assert(fd >= 0);
- assert(value_r != NULL);
- assert(msg != NULL);
- assert(error_r == NULL || *error_r == NULL);
-
- int ret = ioctl(fd, request, value_r);
- if (ret >= 0)
- return SUCCESS;
-
- if (errno == EINVAL)
- return UNSUPPORTED;
-
- g_set_error(error_r, oss_output_quark(), errno,
- "%s: %s", msg, g_strerror(errno));
- return ERROR;
-}
-
-/**
- * Invoke an ioctl on the OSS file descriptor. On success, SUCCESS is
- * returned. If the parameter is not supported, UNSUPPORTED is
- * returned. Any other failure returns ERROR and allocates a GError.
- */
-static enum oss_setup_result
-oss_try_ioctl(int fd, unsigned long request, int value,
- const char *msg, GError **error_r)
-{
- return oss_try_ioctl_r(fd, request, &value, msg, error_r);
-}
-
-/**
- * Set up the channel number, and attempts to find alternatives if the
- * specified number is not supported.
- */
-static bool
-oss_setup_channels(int fd, struct audio_format *audio_format, GError **error_r)
-{
- const char *const msg = "Failed to set channel count";
- int channels = audio_format->channels;
- enum oss_setup_result result =
- oss_try_ioctl_r(fd, SNDCTL_DSP_CHANNELS, &channels, msg, error_r);
- switch (result) {
- case SUCCESS:
- if (!audio_valid_channel_count(channels))
- break;
-
- audio_format->channels = channels;
- return true;
-
- case ERROR:
- return false;
-
- case UNSUPPORTED:
- break;
- }
-
- for (unsigned i = 1; i < 2; ++i) {
- if (i == audio_format->channels)
- /* don't try that again */
- continue;
-
- channels = i;
- result = oss_try_ioctl_r(fd, SNDCTL_DSP_CHANNELS, &channels,
- msg, error_r);
- switch (result) {
- case SUCCESS:
- if (!audio_valid_channel_count(channels))
- break;
-
- audio_format->channels = channels;
- return true;
-
- case ERROR:
- return false;
-
- case UNSUPPORTED:
- break;
- }
- }
-
- g_set_error(error_r, oss_output_quark(), EINVAL, "%s", msg);
- return false;
-}
-
-/**
- * Set up the sample rate, and attempts to find alternatives if the
- * specified sample rate is not supported.
- */
-static bool
-oss_setup_sample_rate(int fd, struct audio_format *audio_format,
- GError **error_r)
-{
- const char *const msg = "Failed to set sample rate";
- int sample_rate = audio_format->sample_rate;
- enum oss_setup_result result =
- oss_try_ioctl_r(fd, SNDCTL_DSP_SPEED, &sample_rate,
- msg, error_r);
- switch (result) {
- case SUCCESS:
- if (!audio_valid_sample_rate(sample_rate))
- break;
-
- audio_format->sample_rate = sample_rate;
- return true;
-
- case ERROR:
- return false;
-
- case UNSUPPORTED:
- break;
- }
-
- static const int sample_rates[] = { 48000, 44100, 0 };
- for (unsigned i = 0; sample_rates[i] != 0; ++i) {
- sample_rate = sample_rates[i];
- if (sample_rate == (int)audio_format->sample_rate)
- continue;
-
- result = oss_try_ioctl_r(fd, SNDCTL_DSP_SPEED, &sample_rate,
- msg, error_r);
- switch (result) {
- case SUCCESS:
- if (!audio_valid_sample_rate(sample_rate))
- break;
-
- audio_format->sample_rate = sample_rate;
- return true;
-
- case ERROR:
- return false;
-
- case UNSUPPORTED:
- break;
- }
- }
-
- g_set_error(error_r, oss_output_quark(), EINVAL, "%s", msg);
- return false;
-}
-
-/**
- * Convert a MPD sample format to its OSS counterpart. Returns
- * AFMT_QUERY if there is no direct counterpart.
- */
-static int
-sample_format_to_oss(enum sample_format format)
-{
- switch (format) {
- case SAMPLE_FORMAT_UNDEFINED:
- case SAMPLE_FORMAT_FLOAT:
- case SAMPLE_FORMAT_DSD:
- return AFMT_QUERY;
-
- case SAMPLE_FORMAT_S8:
- return AFMT_S8;
-
- case SAMPLE_FORMAT_S16:
- return AFMT_S16_NE;
-
- case SAMPLE_FORMAT_S24_P32:
-#ifdef AFMT_S24_NE
- return AFMT_S24_NE;
-#else
- return AFMT_QUERY;
-#endif
-
- case SAMPLE_FORMAT_S32:
-#ifdef AFMT_S32_NE
- return AFMT_S32_NE;
-#else
- return AFMT_QUERY;
-#endif
- }
-
- return AFMT_QUERY;
-}
-
-/**
- * Convert an OSS sample format to its MPD counterpart. Returns
- * SAMPLE_FORMAT_UNDEFINED if there is no direct counterpart.
- */
-static enum sample_format
-sample_format_from_oss(int format)
-{
- switch (format) {
- case AFMT_S8:
- return SAMPLE_FORMAT_S8;
-
- case AFMT_S16_NE:
- return SAMPLE_FORMAT_S16;
-
-#ifdef AFMT_S24_PACKED
- case AFMT_S24_PACKED:
- return SAMPLE_FORMAT_S24_P32;
-#endif
-
-#ifdef AFMT_S24_NE
- case AFMT_S24_NE:
- return SAMPLE_FORMAT_S24_P32;
-#endif
-
-#ifdef AFMT_S32_NE
- case AFMT_S32_NE:
- return SAMPLE_FORMAT_S32;
-#endif
-
- default:
- return SAMPLE_FORMAT_UNDEFINED;
- }
-}
-
-/**
- * Probe one sample format.
- *
- * @return the selected sample format or SAMPLE_FORMAT_UNDEFINED on
- * error
- */
-static enum oss_setup_result
-oss_probe_sample_format(int fd, enum sample_format sample_format,
- enum sample_format *sample_format_r,
- int *oss_format_r,
-#ifdef AFMT_S24_PACKED
- struct pcm_export_state *export,
-#endif
- GError **error_r)
-{
- int oss_format = sample_format_to_oss(sample_format);
- if (oss_format == AFMT_QUERY)
- return UNSUPPORTED;
-
- enum oss_setup_result result =
- oss_try_ioctl_r(fd, SNDCTL_DSP_SAMPLESIZE,
- &oss_format,
- "Failed to set sample format", error_r);
-
-#ifdef AFMT_S24_PACKED
- if (result == UNSUPPORTED && sample_format == SAMPLE_FORMAT_S24_P32) {
- /* if the driver doesn't support padded 24 bit, try
- packed 24 bit */
- oss_format = AFMT_S24_PACKED;
- result = oss_try_ioctl_r(fd, SNDCTL_DSP_SAMPLESIZE,
- &oss_format,
- "Failed to set sample format", error_r);
- }
-#endif
-
- if (result != SUCCESS)
- return result;
-
- sample_format = sample_format_from_oss(oss_format);
- if (sample_format == SAMPLE_FORMAT_UNDEFINED)
- return UNSUPPORTED;
-
- *sample_format_r = sample_format;
- *oss_format_r = oss_format;
-
-#ifdef AFMT_S24_PACKED
- pcm_export_open(export, sample_format, 0, false, false,
- oss_format == AFMT_S24_PACKED,
- oss_format == AFMT_S24_PACKED &&
- G_BYTE_ORDER != G_LITTLE_ENDIAN);
-#endif
-
- return SUCCESS;
-}
-
-/**
- * Set up the sample format, and attempts to find alternatives if the
- * specified format is not supported.
- */
-static bool
-oss_setup_sample_format(int fd, struct audio_format *audio_format,
- int *oss_format_r,
-#ifdef AFMT_S24_PACKED
- struct pcm_export_state *export,
-#endif
- GError **error_r)
-{
- enum sample_format mpd_format;
- enum oss_setup_result result =
- oss_probe_sample_format(fd, audio_format->format,
- &mpd_format, oss_format_r,
-#ifdef AFMT_S24_PACKED
- export,
-#endif
- error_r);
- switch (result) {
- case SUCCESS:
- audio_format->format = mpd_format;
- return true;
-
- case ERROR:
- return false;
-
- case UNSUPPORTED:
- break;
- }
-
- if (result != UNSUPPORTED)
- return result == SUCCESS;
-
- /* the requested sample format is not available - probe for
- other formats supported by MPD */
-
- static const enum sample_format sample_formats[] = {
- SAMPLE_FORMAT_S24_P32,
- SAMPLE_FORMAT_S32,
- SAMPLE_FORMAT_S16,
- SAMPLE_FORMAT_S8,
- SAMPLE_FORMAT_UNDEFINED /* sentinel */
- };
-
- for (unsigned i = 0; sample_formats[i] != SAMPLE_FORMAT_UNDEFINED; ++i) {
- mpd_format = sample_formats[i];
- if (mpd_format == audio_format->format)
- /* don't try that again */
- continue;
-
- result = oss_probe_sample_format(fd, mpd_format,
- &mpd_format, oss_format_r,
-#ifdef AFMT_S24_PACKED
- export,
-#endif
- error_r);
- switch (result) {
- case SUCCESS:
- audio_format->format = mpd_format;
- return true;
-
- case ERROR:
- return false;
-
- case UNSUPPORTED:
- break;
- }
- }
-
- g_set_error_literal(error_r, oss_output_quark(), EINVAL,
- "Failed to set sample format");
- return false;
-}
-
-/**
- * Sets up the OSS device which was opened before.
- */
-static bool
-oss_setup(struct oss_data *od, struct audio_format *audio_format,
- GError **error_r)
-{
- return oss_setup_channels(od->fd, audio_format, error_r) &&
- oss_setup_sample_rate(od->fd, audio_format, error_r) &&
- oss_setup_sample_format(od->fd, audio_format, &od->oss_format,
-#ifdef AFMT_S24_PACKED
- &od->export,
-#endif
- error_r);
-}
-
-/**
- * Reopen the device with the saved audio_format, without any probing.
- */
-static bool
-oss_reopen(struct oss_data *od, GError **error_r)
-{
- assert(od->fd < 0);
-
- od->fd = open_cloexec(od->device, O_WRONLY, 0);
- if (od->fd < 0) {
- g_set_error(error_r, oss_output_quark(), errno,
- "Error opening OSS device \"%s\": %s",
- od->device, g_strerror(errno));
- return false;
- }
-
- enum oss_setup_result result;
-
- const char *const msg1 = "Failed to set channel count";
- result = oss_try_ioctl(od->fd, SNDCTL_DSP_CHANNELS,
- od->audio_format.channels, msg1, error_r);
- if (result != SUCCESS) {
- oss_close(od);
- if (result == UNSUPPORTED)
- g_set_error(error_r, oss_output_quark(), EINVAL,
- "%s", msg1);
- return false;
- }
-
- const char *const msg2 = "Failed to set sample rate";
- result = oss_try_ioctl(od->fd, SNDCTL_DSP_SPEED,
- od->audio_format.sample_rate, msg2, error_r);
- if (result != SUCCESS) {
- oss_close(od);
- if (result == UNSUPPORTED)
- g_set_error(error_r, oss_output_quark(), EINVAL,
- "%s", msg2);
- return false;
- }
-
- const char *const msg3 = "Failed to set sample format";
- result = oss_try_ioctl(od->fd, SNDCTL_DSP_SAMPLESIZE,
- od->oss_format,
- msg3, error_r);
- if (result != SUCCESS) {
- oss_close(od);
- if (result == UNSUPPORTED)
- g_set_error(error_r, oss_output_quark(), EINVAL,
- "%s", msg3);
- return false;
- }
-
- return true;
-}
-
-static bool
-oss_output_open(struct audio_output *ao, struct audio_format *audio_format,
- GError **error)
-{
- struct oss_data *od = (struct oss_data *)ao;
-
- od->fd = open_cloexec(od->device, O_WRONLY, 0);
- if (od->fd < 0) {
- g_set_error(error, oss_output_quark(), errno,
- "Error opening OSS device \"%s\": %s",
- od->device, g_strerror(errno));
- return false;
- }
-
- if (!oss_setup(od, audio_format, error)) {
- oss_close(od);
- return false;
- }
-
- od->audio_format = *audio_format;
- return true;
-}
-
-static void
-oss_output_close(struct audio_output *ao)
-{
- struct oss_data *od = (struct oss_data *)ao;
-
- oss_close(od);
-}
-
-static void
-oss_output_cancel(struct audio_output *ao)
-{
- struct oss_data *od = (struct oss_data *)ao;
-
- if (od->fd >= 0) {
- ioctl(od->fd, SNDCTL_DSP_RESET, 0);
- oss_close(od);
- }
-}
-
-static size_t
-oss_output_play(struct audio_output *ao, const void *chunk, size_t size,
- GError **error)
-{
- struct oss_data *od = (struct oss_data *)ao;
- ssize_t ret;
-
- /* reopen the device since it was closed by dropBufferedAudio */
- if (od->fd < 0 && !oss_reopen(od, error))
- return 0;
-
-#ifdef AFMT_S24_PACKED
- chunk = pcm_export(&od->export, chunk, size, &size);
-#endif
-
- while (true) {
- ret = write(od->fd, chunk, size);
- if (ret > 0) {
-#ifdef AFMT_S24_PACKED
- ret = pcm_export_source_size(&od->export, ret);
-#endif
- return ret;
- }
-
- if (ret < 0 && errno != EINTR) {
- g_set_error(error, oss_output_quark(), errno,
- "Write error on %s: %s",
- od->device, g_strerror(errno));
- return 0;
- }
- }
-}
-
-const struct audio_output_plugin oss_output_plugin = {
- .name = "oss",
- .test_default_device = oss_output_test_default_device,
- .init = oss_output_init,
- .finish = oss_output_finish,
-#ifdef AFMT_S24_PACKED
- .enable = oss_output_enable,
- .disable = oss_output_disable,
-#endif
- .open = oss_output_open,
- .close = oss_output_close,
- .play = oss_output_play,
- .cancel = oss_output_cancel,
-
- .mixer_plugin = &oss_mixer_plugin,
-};