view src/audio/nas/SDL_nasaudio.c @ 1558:b46bb79cc197

Fixed bug #113: Date: Sat, 16 Apr 2005 08:39:22 +1000 From: "Eric Mangold" Subject: [SDL] Window manager does not show SDL window titles Hello, I have an issue with SDL-using applications and the sawfish window manager. The problem is that SDL windows do not show the window caption. My gnome panel *does* show the window name, but the actual sawfish window frame shows no caption at all. All other non-SDL applications that I use work fine. I tried a couple other window managers, and they *were* able to show the SDL window captions correctly. Though there many be other WMs that can't. I believe the problem is that SDL is using the UTF8_STRING type for the window's WM_NAME and WM_ICON properties. In fact, WM_NAME and WM_ICON are supposed to set to a TEXT type, usually STRING (ISO 8859-1). The property names _NET_WM_NAME and _NET_WM_ICON_NAME should be used to store the UTF8_STRING versions of the window title and icon name. You can see the properties I refer to with a command like this: xprop|grep -e "WM.*NAME" Please note the freedesktop.org standard: http://standards.freedesktop.org/wm-spec/wm-spec-1.3.html#id2506954 This page talks a little bit about the history of these properties. Just search down the page for "WM_NAME". http://www.cl.cam.ac.uk/~mgk25/unicode.html Please let me know if I can be of any assistance in resolving this issue. Thanks, Eric Mangold
author Sam Lantinga <slouken@libsdl.org>
date Mon, 20 Mar 2006 07:31:36 +0000 (2006-03-20)
parents d910939febfa
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org

    This driver was written by:
    Erik Inge Bols�
    knan@mo.himolde.no
*/
#include "SDL_config.h"

/* Allow access to a raw mixing buffer */

#include <signal.h>
#include <unistd.h>

#include "SDL_timer.h"
#include "SDL_audio.h"
#include "../SDL_audiomem.h"
#include "../SDL_audio_c.h"
#include "../SDL_audiodev_c.h"
#include "SDL_nasaudio.h"

/* The tag name used by artsc audio */
#define NAS_DRIVER_NAME         "nas"

static struct SDL_PrivateAudioData *this2 = NULL;

/* Audio driver functions */
static int NAS_OpenAudio(_THIS, SDL_AudioSpec *spec);
static void NAS_WaitAudio(_THIS);
static void NAS_PlayAudio(_THIS);
static Uint8 *NAS_GetAudioBuf(_THIS);
static void NAS_CloseAudio(_THIS);

/* Audio driver bootstrap functions */

static int Audio_Available(void)
{
	AuServer *aud = AuOpenServer("", 0, NULL, 0, NULL, NULL);
	if (!aud) return 0;

	AuCloseServer(aud);
	return 1;
}

static void Audio_DeleteDevice(SDL_AudioDevice *device)
{
	SDL_free(device->hidden);
	SDL_free(device);
}

static SDL_AudioDevice *Audio_CreateDevice(int devindex)
{
	SDL_AudioDevice *this;

	/* Initialize all variables that we clean on shutdown */
	this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
	if ( this ) {
		SDL_memset(this, 0, (sizeof *this));
		this->hidden = (struct SDL_PrivateAudioData *)
				SDL_malloc((sizeof *this->hidden));
	}
	if ( (this == NULL) || (this->hidden == NULL) ) {
		SDL_OutOfMemory();
		if ( this ) {
			SDL_free(this);
		}
		return(0);
	}
	SDL_memset(this->hidden, 0, (sizeof *this->hidden));

	/* Set the function pointers */
	this->OpenAudio = NAS_OpenAudio;
	this->WaitAudio = NAS_WaitAudio;
	this->PlayAudio = NAS_PlayAudio;
	this->GetAudioBuf = NAS_GetAudioBuf;
	this->CloseAudio = NAS_CloseAudio;

	this->free = Audio_DeleteDevice;

	return this;
}

AudioBootStrap NAS_bootstrap = {
	NAS_DRIVER_NAME, "Network Audio System",
	Audio_Available, Audio_CreateDevice
};

/* This function waits until it is possible to write a full sound buffer */
static void NAS_WaitAudio(_THIS)
{
	while ( this->hidden->buf_free < this->hidden->mixlen ) {
		AuEvent ev;
		AuNextEvent(this->hidden->aud, AuTrue, &ev);
		AuDispatchEvent(this->hidden->aud, &ev);
	}
}

static void NAS_PlayAudio(_THIS)
{
	while (this->hidden->mixlen > this->hidden->buf_free) { /* We think the buffer is full? Yikes! Ask the server for events,
				    in the hope that some of them is LowWater events telling us more
				    of the buffer is free now than what we think. */
		AuEvent ev;
		AuNextEvent(this->hidden->aud, AuTrue, &ev);
		AuDispatchEvent(this->hidden->aud, &ev);
	}
	this->hidden->buf_free -= this->hidden->mixlen;

	/* Write the audio data */
	AuWriteElement(this->hidden->aud, this->hidden->flow, 0, this->hidden->mixlen, this->hidden->mixbuf, AuFalse, NULL);

	this->hidden->written += this->hidden->mixlen;
	
#ifdef DEBUG_AUDIO
	fprintf(stderr, "Wrote %d bytes of audio data\n", this->hidden->mixlen);
#endif
}

static Uint8 *NAS_GetAudioBuf(_THIS)
{
	return(this->hidden->mixbuf);
}

static void NAS_CloseAudio(_THIS)
{
	if ( this->hidden->mixbuf != NULL ) {
		SDL_FreeAudioMem(this->hidden->mixbuf);
		this->hidden->mixbuf = NULL;
	}
	if ( this->hidden->aud ) {
		AuCloseServer(this->hidden->aud);
		this->hidden->aud = 0;
	}
}

static unsigned char sdlformat_to_auformat(unsigned int fmt)
{
  switch (fmt)
    {
    case AUDIO_U8:
      return AuFormatLinearUnsigned8;
    case AUDIO_S8:
      return AuFormatLinearSigned8;
    case AUDIO_U16LSB:
      return AuFormatLinearUnsigned16LSB;
    case AUDIO_U16MSB:
      return AuFormatLinearUnsigned16MSB;
    case AUDIO_S16LSB:
      return AuFormatLinearSigned16LSB;
    case AUDIO_S16MSB:
      return AuFormatLinearSigned16MSB;
    }
  return AuNone;
}

static AuBool
event_handler(AuServer* aud, AuEvent* ev, AuEventHandlerRec* hnd)
{
	switch (ev->type) {
	case AuEventTypeElementNotify: {
		AuElementNotifyEvent* event = (AuElementNotifyEvent *)ev;

		switch (event->kind) {
		case AuElementNotifyKindLowWater:
			if (this2->buf_free >= 0) {
				this2->really += event->num_bytes;
				gettimeofday(&this2->last_tv, 0);
				this2->buf_free += event->num_bytes;
			} else {
				this2->buf_free = event->num_bytes;
			}
			break;
		case AuElementNotifyKindState:
			switch (event->cur_state) {
			case AuStatePause:
				if (event->reason != AuReasonUser) {
					if (this2->buf_free >= 0) {
						this2->really += event->num_bytes;
						gettimeofday(&this2->last_tv, 0);
						this2->buf_free += event->num_bytes;
					} else {
						this2->buf_free = event->num_bytes;
					}
				}
				break;
			}
		}
	}
	}
	return AuTrue;
}

static AuDeviceID
find_device(_THIS, int nch)
{
	int i;
	for (i = 0; i < AuServerNumDevices(this->hidden->aud); i++) {
		if ((AuDeviceKind(AuServerDevice(this->hidden->aud, i)) ==
				AuComponentKindPhysicalOutput) &&
			AuDeviceNumTracks(AuServerDevice(this->hidden->aud, i)) == nch) {
			return AuDeviceIdentifier(AuServerDevice(this->hidden->aud, i));
		}
	}
	return AuNone;
}

static int NAS_OpenAudio(_THIS, SDL_AudioSpec *spec)
{
	AuElement elms[3];
	int buffer_size;
	Uint16 test_format, format;

	this->hidden->mixbuf = NULL;

	/* Try for a closest match on audio format */
	format = 0;
	for ( test_format = SDL_FirstAudioFormat(spec->format);
						! format && test_format; ) {
		format = sdlformat_to_auformat(test_format);

		if (format == AuNone) {
			test_format = SDL_NextAudioFormat();
		}
	}
	if ( format == 0 ) {
		SDL_SetError("Couldn't find any hardware audio formats");
		return(-1);
	}
	spec->format = test_format;

	this->hidden->aud = AuOpenServer("", 0, NULL, 0, NULL, NULL);
	if (this->hidden->aud == 0)
	{
		SDL_SetError("Couldn't open connection to NAS server");
		return (-1);
	}
	
	this->hidden->dev = find_device(this, spec->channels);
	if ((this->hidden->dev == AuNone) || (!(this->hidden->flow = AuCreateFlow(this->hidden->aud, NULL)))) {
		AuCloseServer(this->hidden->aud);
		this->hidden->aud = 0;
		SDL_SetError("Couldn't find a fitting playback device on NAS server");
		return (-1);
	}
	
	buffer_size = spec->freq;
	if (buffer_size < 4096)
		buffer_size = 4096; 

	if (buffer_size > 32768)
		buffer_size = 32768; /* So that the buffer won't get unmanageably big. */

	/* Calculate the final parameters for this audio specification */
	SDL_CalculateAudioSpec(spec);

	this2 = this->hidden;

	AuMakeElementImportClient(elms, spec->freq, format, spec->channels, AuTrue,
				buffer_size, buffer_size / 4, 0, NULL);
	AuMakeElementExportDevice(elms+1, 0, this->hidden->dev, spec->freq,
				AuUnlimitedSamples, 0, NULL);
	AuSetElements(this->hidden->aud, this->hidden->flow, AuTrue, 2, elms, NULL);
	AuRegisterEventHandler(this->hidden->aud, AuEventHandlerIDMask, 0, this->hidden->flow,
				event_handler, (AuPointer) NULL);

	AuStartFlow(this->hidden->aud, this->hidden->flow, NULL);

	/* Allocate mixing buffer */
	this->hidden->mixlen = spec->size;
	this->hidden->mixbuf = (Uint8 *)SDL_AllocAudioMem(this->hidden->mixlen);
	if ( this->hidden->mixbuf == NULL ) {
		return(-1);
	}
	SDL_memset(this->hidden->mixbuf, spec->silence, spec->size);

	/* Get the parent process id (we're the parent of the audio thread) */
	this->hidden->parent = getpid();

	/* We're ready to rock and roll. :-) */
	return(0);
}