/* gfx_gdi_init:
*/
static struct BITMAP *gfx_gdi_init(int w, int h, int v_w, int v_h, int color_depth)
{
/* virtual screen are not supported */
if ((v_w!=0 && v_w!=w) || (v_h!=0 && v_h!=h))
return NULL;
_enter_critical();
gfx_gdi.w = w;
gfx_gdi.h = h;
if (adjust_window(w, h) != 0) {
_TRACE(PREFIX_E "window size not supported.\n");
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Resolution not supported"));
goto Error;
}
/* the last flag serves as an end of loop delimiter */
gdi_dirty_lines = _AL_MALLOC_ATOMIC((h+1) * sizeof(char));
ASSERT(gdi_dirty_lines);
memset(gdi_dirty_lines, 0, (h+1) * sizeof(char));
gdi_dirty_lines[h] = 1;
/* create the screen surface */
screen_surf = _AL_MALLOC_ATOMIC(w * h * BYTES_PER_PIXEL(color_depth));
gdi_screen = _make_bitmap(w, h, (unsigned long)screen_surf, &gfx_gdi, color_depth, w * BYTES_PER_PIXEL(color_depth));
gdi_screen->write_bank = gfx_gdi_write_bank;
_screen_vtable.acquire = gfx_gdi_lock;
_screen_vtable.release = gfx_gdi_unlock;
_screen_vtable.unwrite_bank = gfx_gdi_unwrite_bank;
/* create render timer */
vsync_event = CreateEvent(NULL, FALSE, FALSE, NULL);
install_int(render_proc, RENDER_DELAY);
/* connect to the system driver */
win_gfx_driver = &win_gfx_driver_gdi;
/* set the default switching policy */
set_display_switch_mode(SWITCH_PAUSE);
/* grab input devices */
win_grab_input();
_exit_critical();
return gdi_screen;
Error:
_exit_critical();
gfx_gdi_exit(NULL);
return NULL;
}
/* sys_directx_get_executable_name:
* Returns full path to the current executable.
*/
static void sys_directx_get_executable_name(char *output, int size)
{
char *temp = _AL_MALLOC_ATOMIC(size);
if (GetModuleFileName(allegro_inst, temp, size))
do_uconvert(temp, U_ASCII, output, U_CURRENT, size);
else
usetc(output, 0);
_AL_FREE(temp);
}
/* sys_directx_message:
* Displays a message.
*/
static void sys_directx_message(AL_CONST char *msg)
{
char *tmp1 = _AL_MALLOC_ATOMIC(ALLEGRO_MESSAGE_SIZE);
char tmp2[WND_TITLE_SIZE*2];
HWND allegro_wnd = win_get_window();
while ((ugetc(msg) == '\r') || (ugetc(msg) == '\n'))
msg += uwidth(msg);
MessageBoxW(allegro_wnd,
(unsigned short *)uconvert(msg, U_CURRENT, tmp1, U_UNICODE, ALLEGRO_MESSAGE_SIZE),
(unsigned short *)uconvert(wnd_title, U_ASCII, tmp2, U_UNICODE, sizeof(tmp2)),
MB_OK);
_AL_FREE(tmp1);
}
/* get_dib_from_bitmap_32:
* Creates a Windows device-independent bitmap (DIB) from an Allegro BITMAP.
* You have to free the memory allocated by this function.
*
* This version always creates a 32-bit DIB.
*/
static BYTE *get_dib_from_bitmap_32(ALLEGRO_BITMAP *bitmap)
{
int w, h;
int x, y;
int pitch;
BYTE *pixels;
BYTE *dst;
w = al_get_bitmap_width(bitmap);
h = al_get_bitmap_height(bitmap);
pitch = w * 4;
pixels = (BYTE *) _AL_MALLOC_ATOMIC(h * pitch);
if (!pixels)
return NULL;
for (y = 0; y < h; y++) {
dst = pixels + y * pitch;
for (x = 0; x < w; x++) {
ALLEGRO_COLOR col;
unsigned char r, g, b, a;
col = al_get_pixel(bitmap, x, y);
al_unmap_rgba(col, &r, &g, &b, &a);
/* BGR */
dst[0] = b;
dst[1] = g;
dst[2] = r;
dst[3] = a;
dst += 4;
}
}
return pixels;
}
/* Function: al_load_ogg_vorbis_f
*/
ALLEGRO_SAMPLE *al_load_ogg_vorbis_f(ALLEGRO_FILE* file)
{
/* Note: decoding library returns floats. I always return 16-bit (most
* commonly supported).
*/
#ifdef ALLEGRO_LITTLE_ENDIAN
const int endian = 0; /* 0 for Little-Endian, 1 for Big-Endian */
#else
const int endian = 1; /* 0 for Little-Endian, 1 for Big-Endian */
#endif
int word_size = 2; /* 1 = 8bit, 2 = 16-bit. nothing else */
int signedness = 1; /* 0 for unsigned, 1 for signed */
const int packet_size = 4096; /* suggestion for size to read at a time */
OggVorbis_File vf;
vorbis_info* vi;
char *buffer;
long pos;
ALLEGRO_SAMPLE *sample;
int channels;
long rate;
long total_samples;
int bitstream;
long total_size;
AL_OV_DATA ov;
if (file == NULL) {
ALLEGRO_WARN("Audio file failed to open.\n");
return NULL;
}
ov.file = file;
if (ov_open_callbacks(&ov, &vf, NULL, 0, callbacks) < 0) {
ALLEGRO_WARN("Audio file does not appear to be an Ogg bitstream.\n");
al_fclose(file);
return NULL;
}
vi = ov_info(&vf, -1);
channels = vi->channels;
rate = vi->rate;
total_samples = ov_pcm_total(&vf, -1);
bitstream = -1;
total_size = total_samples * channels * word_size;
ALLEGRO_DEBUG("channels %d\n", channels);
ALLEGRO_DEBUG("word_size %d\n", word_size);
ALLEGRO_DEBUG("rate %ld\n", rate);
ALLEGRO_DEBUG("total_samples %ld\n", total_samples);
ALLEGRO_DEBUG("total_size %ld\n", total_size);
buffer = _AL_MALLOC_ATOMIC(total_size);
if (!buffer) {
al_fclose(file);
return NULL;
}
pos = 0;
while (pos < total_size) {
/* XXX error handling */
#if !defined(ALLEGRO_GP2XWIZ) && !defined(ALLEGRO_IPHONE)
long read = ov_read(&vf, buffer + pos, packet_size, endian, word_size,
signedness, &bitstream);
#else
(void)endian;
(void)signedness;
long read = ov_read(&vf, buffer + pos, packet_size, &bitstream);
#endif
pos += read;
if (read == 0)
break;
}
ov_clear(&vf);
sample = al_create_sample(buffer, total_samples, rate,
_al_word_size_to_depth_conf(word_size),
_al_count_to_channel_conf(channels), true);
if (!sample) {
_AL_FREE(buffer);
}
return sample;
}
/* _unix_read_os_type:
* Set the os_type variable to something sensible.
*/
void _unix_read_os_type(void)
{
#ifdef ALLEGRO_HAVE_SYS_UTSNAME_H
struct utsname utsn;
char *tmpstr, *tmpstr2;
size_t pos;
uname(&utsn);
/* fetch OS version and revision */
tmpstr = _AL_MALLOC_ATOMIC(strlen(utsn.release)+1);
_al_sane_strncpy(tmpstr, utsn.release, strlen(utsn.release)+1);
tmpstr2 = NULL;
for (pos = 0; pos <= strlen(utsn.release); pos++) {
if (tmpstr[pos] == '.') {
tmpstr[pos] = '\0';
if (!tmpstr2)
tmpstr2 = tmpstr + pos + 1;
}
}
os_version = atoi(tmpstr);
os_revision = atoi(tmpstr2);
_AL_FREE(tmpstr);
/* try to detect Unix systems we know of */
if (!strcmp(utsn.sysname, "Linux")) {
os_type = OSTYPE_LINUX;
}
else if (!strcmp(utsn.sysname, "SunOS")) {
os_type = OSTYPE_SUNOS;
}
else if (!strcmp(utsn.sysname, "FreeBSD")) {
os_type = OSTYPE_FREEBSD;
}
else if (!strcmp(utsn.sysname, "NetBSD")) {
os_type = OSTYPE_NETBSD;
}
else if (!strcmp(utsn.sysname, "OpenBSD")) {
os_type = OSTYPE_OPENBSD;
}
else if ((!strcmp(utsn.sysname, "IRIX"))
|| (!strcmp(utsn.sysname, "IRIX64"))) {
os_type = OSTYPE_IRIX;
}
else if (!strcmp(utsn.sysname, "Darwin")) {
os_type = OSTYPE_DARWIN;
}
else if (!strcmp(utsn.sysname, "QNX")) {
os_type = OSTYPE_QNX;
}
else {
os_type = OSTYPE_UNIX; /* that's all we can say for now */
}
#else
os_type = OSTYPE_UNIX;
#endif
os_multitasking = TRUE;
}
/* jack_init:
* JACK init routine.
*/
static int jack_init(int input, int voices)
{
const char **ports;
char tmp[128];
if (!jack_detect(input))
return -1;
jack_bufsize = get_config_int("sound", "jack_buffer_size",
jack_bufsize);
if (jack_bufsize == -1)
jack_bufsize = jack_get_buffer_size (jack_client);
/* Those are already read in from the config file by Allegro. */
jack_16bit = (_sound_bits == 16 ? 1 : 0);
jack_stereo = (_sound_stereo ? 1 : 0);
/* Let Allegro mix in its native unsigned format. */
jack_signed = 0;
jack_set_process_callback (jack_client, jack_process, NULL);
output_left = jack_port_register (jack_client, jack_stereo ? "left" : "mono",
JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
if (jack_stereo)
output_right = jack_port_register (jack_client, "right",
JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
jack_rate = jack_get_sample_rate (jack_client);
jack_buffer = _AL_MALLOC_ATOMIC(jack_bufsize * (1 + jack_16bit) * (1 + jack_stereo));
if (!jack_buffer) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text(
"Cannot allocate audio buffer"));
jack_exit (input);
return -1;
}
digi_jack.voices = voices;
if (_mixer_init(jack_bufsize * (1 + jack_stereo), jack_rate,
jack_stereo, jack_16bit, &digi_jack.voices)) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text(
"Cannot init software mixer"));
jack_exit (input);
return -1;
}
_mix_some_samples((uintptr_t) jack_buffer, 0, jack_signed);
if (jack_activate (jack_client)) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text(
"Cannot activate Jack client"));
jack_exit (input);
return 1;
}
/* Try to connect the ports. Failure to connect is not critical, since with
* JACK, users may connect/disconnect ports anytime, without Allegro caring.
*/
if ((ports = jack_get_ports (jack_client, NULL, NULL,
JackPortIsPhysical|JackPortIsInput)) == NULL) {
TRACE (PREFIX_I "Cannot find any physical playback ports");
}
if (ports) {
if (ports[0]) {
if (jack_connect (jack_client, jack_port_name (output_left), ports[0]) == 0)
TRACE (PREFIX_I "Connected left playback port to %s", ports[0]);
}
if (jack_stereo && ports[1]) {
if (jack_connect (jack_client, jack_port_name (output_right), ports[1]) == 0)
TRACE (PREFIX_I "Connected right playback port to %s", ports[1]);
}
_AL_FREE (ports);
}
uszprintf(jack_desc, sizeof(jack_desc),
get_config_text ("Jack, client '%s': %d bits, %s, %d bps, %s"),
jack_client_name, jack_16bit ? 16 : 8,
uconvert_ascii((jack_signed ? "signed" : "unsigned"), tmp),
jack_rate, uconvert_ascii((jack_stereo ? "stereo" : "mono"), tmp));
return 0;
}
static int
sndio_init(int input, int voices)
{
char tmp1[128], tmp2[128];
if (input) {
digi_driver->rec_cap_bits = 16;
digi_driver->rec_cap_stereo = TRUE;
return 0;
}
if (open_sndio_device(0) != 0)
return -1;
sndio_play_bufdata = _AL_MALLOC_ATOMIC(sndio_play_bufsize);
if (sndio_play_bufdata == 0) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE,
get_config_text("Can not allocate audio buffer"));
sio_close(hdl);
return -1;
}
sndio_realpos = sndio_playpos = 0;
sio_onmove(hdl, movecb, NULL);
sndio_volume = 127;
sio_onvol(hdl, volcb, NULL);
if (!sio_start(hdl)) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE,
get_config_text("Can not start sndio"));
sio_close(hdl);
return -1;
}
digi_sndio.voices = voices;
/* first arg is total number of samples */
if (_mixer_init(sndio_play_round * (_sound_stereo ? 2 : 1),
_sound_freq, _sound_stereo, ((_sound_bits == 16) ? 1 : 0),
&digi_sndio.voices) != 0) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE,
get_config_text("Can not init software mixer"));
sio_close(hdl);
return -1;
}
_mix_some_samples((uintptr_t) sndio_play_bufdata, 0, sndio_signed);
/* Add audio interrupt. */
_unix_bg_man->register_func(sndio_update);
uszprintf(sndio_desc, sizeof(sndio_desc),
get_config_text("%s: %d bits, %s, %d Hz, %s"),
"sndio device",
_sound_bits,
uconvert_ascii((sndio_signed ? "signed" : "unsigned"), tmp1),
_sound_freq,
uconvert_ascii((par.pchan == 2 ? "stereo" : "mono"), tmp2));
digi_driver->desc = sndio_desc;
return 0;
}
/* create_bitmap_ex
* Creates a new memory bitmap in the specified color_depth
*/
BITMAP *create_bitmap_ex(int color_depth, int width, int height)
{
GFX_VTABLE *vtable;
BITMAP *bitmap;
int nr_pointers;
int padding;
int i;
ASSERT(width >= 0);
ASSERT(height > 0);
ASSERT(system_driver);
if (system_driver->create_bitmap)
return system_driver->create_bitmap(color_depth, width, height);
vtable = _get_vtable(color_depth);
if (!vtable)
return NULL;
/* We need at least two pointers when drawing, otherwise we get crashes with
* Electric Fence. We think some of the assembly code assumes a second line
* pointer is always available.
*/
nr_pointers = MAX(2, height);
bitmap = _AL_MALLOC(sizeof(BITMAP) + (sizeof(char *) * nr_pointers));
if (!bitmap)
return NULL;
/* This avoids a crash for assembler code accessing the last pixel, as it
* read 4 bytes instead of 3.
*/
padding = (color_depth == 24) ? 1 : 0;
bitmap->dat = _AL_MALLOC_ATOMIC(width * height * BYTES_PER_PIXEL(color_depth) + padding);
if (!bitmap->dat) {
_AL_FREE(bitmap);
return NULL;
}
bitmap->w = bitmap->cr = width;
bitmap->h = bitmap->cb = height;
bitmap->clip = TRUE;
bitmap->cl = bitmap->ct = 0;
bitmap->vtable = vtable;
bitmap->write_bank = bitmap->read_bank = _stub_bank_switch;
bitmap->id = 0;
bitmap->extra = NULL;
bitmap->x_ofs = 0;
bitmap->y_ofs = 0;
bitmap->seg = _default_ds();
if (height > 0) {
bitmap->line[0] = bitmap->dat;
for (i=1; i<height; i++)
bitmap->line[i] = bitmap->line[i-1] + width * BYTES_PER_PIXEL(color_depth);
}
if (system_driver->created_bitmap)
system_driver->created_bitmap(bitmap);
return bitmap;
}
static int joy_init(void)
{
JOYSTICK_INFO *j;
AL_CONST char *device_name = NULL;
char tmp[128], tmp1[128], tmp2[128];
unsigned int raw_version;
struct {
unsigned char build, minor, major;
} version;
char num_axes, num_buttons;
int throttle;
int i, s, a, b;
for (i = 0; i < MAX_JOYSTICKS; i++) {
/* Check for a user override on the device to use. */
uszprintf(tmp, sizeof(tmp), uconvert_ascii("joystick_device_%d", tmp1), i);
device_name = get_config_string(uconvert_ascii("joystick", tmp1), tmp, NULL);
/* Special case for the first joystick. */
if (!device_name && (i == 0))
device_name = get_config_string(uconvert_ascii("joystick", tmp1),
uconvert_ascii("joystick_device", tmp2),
NULL);
if (device_name) {
joy_fd[i] = open(uconvert_toascii(device_name, tmp), O_RDONLY|O_NONBLOCK);
if (joy_fd[i] == -1)
break;
}
else {
snprintf(tmp, sizeof(tmp), "/dev/input/js%d", i);
tmp[sizeof(tmp)-1] = 0;
joy_fd[i] = open(tmp, O_RDONLY|O_NONBLOCK);
if (joy_fd[i] == -1) {
snprintf(tmp, sizeof(tmp), "/dev/js%d", i);
tmp[sizeof(tmp)-1] = 0;
joy_fd[i] = open(tmp, O_RDONLY|O_NONBLOCK);
if (joy_fd[i] == -1)
break;
}
}
if (ioctl(joy_fd[i], JSIOCGVERSION, &raw_version) < 0) {
/* NOTE: IOCTL fails if the joystick API is version 0.x */
uszprintf(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Your Linux joystick API is version 0.x which is unsupported."));
return -1;
}
version.major = (raw_version & 0xFF0000) >> 16;
version.minor = (raw_version & 0xFF00) >> 8;
version.build = (raw_version & 0xFF);
ioctl(joy_fd[i], JSIOCGAXES, &num_axes);
ioctl(joy_fd[i], JSIOCGBUTTONS, &num_buttons);
if (num_axes > TOTAL_JOYSTICK_AXES)
num_axes = TOTAL_JOYSTICK_AXES;
if (num_buttons > MAX_JOYSTICK_BUTTONS)
num_buttons = MAX_JOYSTICK_BUTTONS;
/* User is allowed to override our simple assumption of which
* axis number (kernel) the throttle is located at. */
uszprintf(tmp, sizeof(tmp), uconvert_ascii("throttle_axis_%d", tmp1), i);
throttle = get_config_int(uconvert_ascii("joystick", tmp1), tmp, -1);
if (throttle == -1) {
throttle = get_config_int(uconvert_ascii("joystick", tmp1),
uconvert_ascii("throttle_axis", tmp2), -1);
}
/* Each pair of axes is assumed to make up a stick unless it
* is the sole remaining axis, or has been user specified, in
* which case it is a throttle. */
j = &joy[i];
j->flags = JOYFLAG_ANALOGUE;
for (s = 0, a = 0; (s < MAX_JOYSTICK_STICKS) && (a < num_axes); s++) {
if ((a == throttle) || (a == num_axes-1)) {
/* One axis throttle */
j->stick[s].flags = JOYFLAG_ANALOGUE | JOYFLAG_UNSIGNED;
j->stick[s].num_axis = 1;
j->stick[s].axis[0].name = get_config_text("Throttle");
j->stick[s].name = ustrdup(j->stick[s].axis[0].name);
axis[i][a++] = &j->stick[s].axis[0];
}
else {
/* Two axis stick. */
j->stick[s].flags = JOYFLAG_ANALOGUE | JOYFLAG_SIGNED;
j->stick[s].num_axis = 2;
j->stick[s].axis[0].name = get_config_text("X");
j->stick[s].axis[1].name = get_config_text("Y");
j->stick[s].name = _AL_MALLOC_ATOMIC(32);
ASSERT(j->stick[s].name);
uszprintf((char *)j->stick[s].name, 32, get_config_text("Stick %d"), s+1);
axis[i][a++] = &j->stick[s].axis[0];
axis[i][a++] = &j->stick[s].axis[1];
}
}
j->num_sticks = s;
for (b = 0; b < num_buttons; b++) {
j->button[b].name = _AL_MALLOC_ATOMIC(16);
ASSERT(j->button[b].name);
uszprintf((char *)j->button[b].name, 16, uconvert_ascii("%c", tmp), 'A' + b);
}
j->num_buttons = num_buttons;
}
num_joysticks = i;
if (num_joysticks == 0) {
uszprintf(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Unable to open %s: %s"),
device_name ? device_name : uconvert_ascii("/dev/js0", tmp), ustrerror(errno));
return -1;
}
return 0;
}
/* ljoy_get_joystick: [primary thread]
*
* Returns the address of a ALLEGRO_JOYSTICK structure for the device
* number NUM. The top-level joystick functions will not call this
* function if joystick number NUM was already gotten. If the
* device cannot be opened, NULL is returned.
*/
static ALLEGRO_JOYSTICK *ljoy_get_joystick(int num)
{
ALLEGRO_JOYSTICK_LINUX *joy;
int fd;
/* Try to open the device. */
fd = try_open_joy_device(num);
if (fd == -1)
return NULL;
/* Allocate a structure for the joystick. */
joy = _AL_MALLOC(sizeof *joy);
if (!joy) {
close(fd);
return NULL;
}
memset(joy, 0, sizeof *joy);
/* Initialise the event source part of it. */
_al_event_source_init(&joy->parent.es);
/* Fill in the joystick information fields. */
{
/* char tmp[128], tmp1[128], tmp2[128]; */
char num_axes;
char num_buttons;
int throttle;
int s, a, b;
ioctl(fd, JSIOCGAXES, &num_axes);
ioctl(fd, JSIOCGBUTTONS, &num_buttons);
if (num_axes > TOTAL_JOYSTICK_AXES)
num_axes = TOTAL_JOYSTICK_AXES;
if (num_buttons > _AL_MAX_JOYSTICK_BUTTONS)
num_buttons = _AL_MAX_JOYSTICK_BUTTONS;
/* XXX use configuration system when we get one */
throttle = -1;
#if 0
/* User is allowed to override our simple assumption of which
* axis number (kernel) the throttle is located at. */
snprintf(tmp, sizeof(tmp), "throttle_axis_%d", num);
throttle = get_config_int("joystick", tmp, -1);
if (throttle == -1) {
throttle = get_config_int("joystick",
"throttle_axis", -1);
}
#endif
/* Each pair of axes is assumed to make up a stick unless it
* is the sole remaining axis, or has been user specified, in
* which case it is a throttle. */
for (s = 0, a = 0;
s < _AL_MAX_JOYSTICK_STICKS && a < num_axes;
s++)
{
if ((a == throttle) || (a == num_axes-1)) {
/* One axis throttle. */
joy->parent.info.stick[s].flags = ALLEGRO_JOYFLAG_ANALOGUE;
joy->parent.info.stick[s].num_axes = 1;
joy->parent.info.stick[s].axis[0].name = "Throttle";
char *name = joy->parent.info.stick[s].axis[0].name;
joy->parent.info.stick[s].name = _AL_MALLOC_ATOMIC(strlen(name) + 1);
strcpy(joy->parent.info.stick[s].name, name);
joy->axis_mapping[a].stick = s;
joy->axis_mapping[a].axis = 0;
a++;
}
else {
/* Two axis stick. */
joy->parent.info.stick[s].flags = ALLEGRO_JOYFLAG_ANALOGUE;
joy->parent.info.stick[s].num_axes = 2;
joy->parent.info.stick[s].axis[0].name = "X";
joy->parent.info.stick[s].axis[1].name = "Y";
joy->parent.info.stick[s].name = _AL_MALLOC_ATOMIC (32);
snprintf((char *)joy->parent.info.stick[s].name, 32, "Stick %d", s+1);
joy->axis_mapping[a].stick = s;
joy->axis_mapping[a].axis = 0;
a++;
joy->axis_mapping[a].stick = s;
joy->axis_mapping[a].axis = 1;
a++;
}
}
joy->parent.info.num_sticks = s;
/* Do the buttons. */
for (b = 0; b < num_buttons; b++) {
joy->parent.info.button[b].name = _AL_MALLOC_ATOMIC (32);
snprintf((char *)joy->parent.info.button[b].name, 32, "B%d", b+1);
}
joy->parent.info.num_buttons = num_buttons;
}
joy->parent.num = num;
joy->fd = fd;
/* Register the joystick with the fdwatch subsystem. */
_al_unix_start_watching_fd(joy->fd, ljoy_process_new_data, joy);
return (ALLEGRO_JOYSTICK *) joy;
}
/* alsa_init:
* ALSA init routine.
*/
static int alsa_init(int input, int voices)
{
int ret = 0;
char tmp1[128], tmp2[128];
int format = 0;
unsigned int numfrags = 0;
snd_pcm_uframes_t fragsize;
if (input) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Input is not supported"));
return -1;
}
ALSA9_CHECK(snd_output_stdio_attach(&snd_output, stdout, 0));
alsa_device = get_config_string(uconvert_ascii("sound", tmp1),
uconvert_ascii("alsa_device", tmp2),
alsa_device);
alsa_mixer_device = get_config_string(uconvert_ascii("sound", tmp1),
uconvert_ascii("alsa_mixer_device", tmp2),
alsa_mixer_device);
fragsize = get_config_int(uconvert_ascii("sound", tmp1),
uconvert_ascii("alsa_fragsize", tmp2), 0);
numfrags = get_config_int(uconvert_ascii("sound", tmp1),
uconvert_ascii("alsa_numfrags", tmp2),
ALSA_DEFAULT_NUMFRAGS);
ret = snd_pcm_open(&pcm_handle, alsa_device, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
if (ret < 0) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Can not open card/pcm device"));
return -1;
}
snd_mixer_open(&alsa_mixer, 0);
if (alsa_mixer
&& snd_mixer_attach(alsa_mixer, alsa_mixer_device) >= 0
&& snd_mixer_selem_register (alsa_mixer, NULL, NULL) >= 0
&& snd_mixer_load(alsa_mixer) >= 0) {
const char *alsa_mixer_elem_name = get_config_string(uconvert_ascii("sound", tmp1),
uconvert_ascii("alsa_mixer_elem", tmp2),
"PCM");
alsa_mixer_elem = snd_mixer_first_elem(alsa_mixer);
while (alsa_mixer_elem) {
const char *name = snd_mixer_selem_get_name(alsa_mixer_elem);
if (strcasecmp(name, alsa_mixer_elem_name) == 0) {
snd_mixer_selem_get_playback_volume_range(alsa_mixer_elem, &alsa_mixer_elem_min, &alsa_mixer_elem_max);
alsa_mixer_allegro_ratio = (double) (alsa_mixer_elem_max - alsa_mixer_elem_min) / (double) 255;
break;
}
alsa_mixer_elem = snd_mixer_elem_next(alsa_mixer_elem);
}
}
/* Set format variables. */
alsa_bits = (_sound_bits == 8) ? 8 : 16;
alsa_stereo = (_sound_stereo) ? 1 : 0;
alsa_rate = (_sound_freq > 0) ? _sound_freq : 44100;
alsa_signed = 0;
format = ((alsa_bits == 16) ? SND_PCM_FORMAT_U16_NE : SND_PCM_FORMAT_U8);
switch (format) {
case SND_PCM_FORMAT_U8:
alsa_bits = 8;
break;
case SND_PCM_FORMAT_U16_NE:
if (sizeof(short) != 2) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Unsupported sample format"));
goto Error;
}
break;
default:
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Unsupported sample format"));
goto Error;
}
alsa_sample_size = (alsa_bits / 8) * (alsa_stereo ? 2 : 1);
if (fragsize == 0) {
unsigned int size = alsa_rate * ALSA_DEFAULT_BUFFER_MS / 1000 / numfrags;
fragsize = 1;
while (fragsize < size)
fragsize <<= 1;
}
snd_pcm_hw_params_malloc(&hwparams);
snd_pcm_sw_params_malloc(&swparams);
ALSA9_CHECK(snd_pcm_hw_params_any(pcm_handle, hwparams));
ALSA9_CHECK(snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED));
ALSA9_CHECK(snd_pcm_hw_params_set_format(pcm_handle, hwparams, format));
ALSA9_CHECK(snd_pcm_hw_params_set_channels(pcm_handle, hwparams, alsa_stereo + 1));
ALSA9_CHECK(snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &alsa_rate, NULL));
ALSA9_CHECK(snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &fragsize, NULL));
ALSA9_CHECK(snd_pcm_hw_params_set_periods_near(pcm_handle, hwparams, &numfrags, NULL));
ALSA9_CHECK(snd_pcm_hw_params(pcm_handle, hwparams));
ALSA9_CHECK(snd_pcm_hw_params_get_period_size(hwparams, &alsa_bufsize, NULL));
ALSA9_CHECK(snd_pcm_hw_params_get_periods(hwparams, &alsa_fragments, NULL));
TRACE (PREFIX_I "alsa_bufsize = %ld, alsa_fragments = %d\n", alsa_bufsize, alsa_fragments);
ALSA9_CHECK(snd_pcm_sw_params_current(pcm_handle, swparams));
ALSA9_CHECK(snd_pcm_sw_params_set_start_threshold(pcm_handle, swparams, alsa_bufsize));
ALSA9_CHECK(snd_pcm_sw_params_set_avail_min(pcm_handle, swparams, fragsize));
ALSA9_CHECK(snd_pcm_sw_params_set_xfer_align(pcm_handle, swparams, 1));
ALSA9_CHECK(snd_pcm_sw_params(pcm_handle, swparams));
/* Allocate mixing buffer. */
alsa_bufdata = _AL_MALLOC_ATOMIC(alsa_bufsize * alsa_sample_size);
if (!alsa_bufdata) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Can not allocate audio buffer"));
goto Error;
}
/* Initialise mixer. */
digi_alsa.voices = voices;
if (_mixer_init(alsa_bufsize * (alsa_stereo ? 2 : 1), alsa_rate,
alsa_stereo, ((alsa_bits == 16) ? 1 : 0),
&digi_alsa.voices) != 0) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Can not init software mixer"));
goto Error;
}
snd_pcm_prepare(pcm_handle);
pdc = snd_pcm_poll_descriptors_count (pcm_handle);
if (pdc <= 0) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Invalid poll descriptors count"));
goto Error;
}
ufds = _AL_MALLOC(sizeof(struct pollfd) * pdc);
if (ufds == NULL) {
ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Not enough memory for poll descriptors"));
goto Error;
}
ALSA9_CHECK(snd_pcm_poll_descriptors(pcm_handle, ufds, pdc));
poll_next = 0;
_mix_some_samples((uintptr_t) alsa_bufdata, 0, alsa_signed);
/* Add audio interrupt. */
_unix_bg_man->register_func(alsa_update);
uszprintf(alsa_desc, sizeof(alsa_desc),
get_config_text
("Alsa 0.9, Device '%s': %d bits, %s, %d bps, %s"),
alsa_device, alsa_bits,
uconvert_ascii((alsa_signed ? "signed" : "unsigned"), tmp1),
alsa_rate, uconvert_ascii((alsa_stereo ? "stereo" : "mono"), tmp2));
digi_driver->desc = alsa_desc;
return 0;
Error:
if (pcm_handle) {
snd_pcm_close(pcm_handle);
pcm_handle = NULL;
}
return -1;
}
