output/{alsa,oss}: convert to C++

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,
-};