misc/libopenalbridge/commands.c
author koda
Fri, 06 Jan 2012 01:51:04 +0100
changeset 6551 a2f39cb9af62
parent 3697 d5b30d6373fc
permissions -rw-r--r--
fix a couple of loose ends: sdl_mixer is informed of that OGG is provided by Tremor with its own macro, there is no more a segfault on Tremor cleanup, added new event type and timestamp entry for SDL, removed spurious characters from the japanese translation, uSound errors now are output with SDLTry, uSound doesn't need sound preloading any more
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/*
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 *  commands.c
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 *  Hedgewars
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 *
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 *  Created by Vittorio on 13/06/10.
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 *  Copyright 2010 __MyCompanyName__. All rights reserved.
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 *
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 */
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#include "commands.h"
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#include "wrappers.h"
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ALfloat old_gain;
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extern ALuint *Sources;
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extern ALuint cache_size, cache_index, sources_number;
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extern ALboolean instances_number;
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extern al_sound_t *the_sounds;
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void openal_pausesound (uint32_t index) {
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    if (openal_ready() == AL_TRUE && index < cache_size)
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        alSourcePause(Sources[the_sounds[index].source_index]);
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}
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void openal_stopsound (uint32_t index) {
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    if (openal_ready() == AL_TRUE && index < cache_size)
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        alSourceStop(Sources[the_sounds[index].source_index]);
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}
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void openal_playsound (unsigned int index) {
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    ALboolean needsSource = AL_TRUE;
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    ALfloat SourcePosition[] = { 0.0, 0.0, 0.0 };
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    ALfloat SourceVelocity[] = { 0.0, 0.0, 0.0 };
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    ALint state;
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    int i, j;
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    if (openal_ready() == AL_TRUE && index < cache_size) {
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        // check if sound has already a source
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        if (the_sounds[index].source_index != -1) {
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            // it has a source, check it's not playing
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            alGetSourcei(Sources[the_sounds[index].source_index], AL_SOURCE_STATE, &state);
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            if (state != AL_PLAYING && state != AL_PAUSED) {
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                // it is not being played, so we can use it safely
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	            needsSource = AL_FALSE;
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            }
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            // else it is being played, so we have to allocate a new source for this buffer
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        }
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        if (needsSource) {
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#ifdef DEBUG
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            fprintf(stderr,"(Bridge Debug) - looking for a source for sound %d\n", index);
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#endif
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            for (i = 0; i < sources_number; i++) {
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                // let's iterate on Sources until we find a source that is not playing
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                alGetSourcei(Sources[i], AL_SOURCE_STATE, &state);
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                if (state != AL_PLAYING && state != AL_PAUSED) {
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                    // let's iterate on the_sounds until we find the sound using that source
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                    for (j = 0; j < cache_size; j++) {
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                        if (the_sounds[j].source_index == i) {
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                            the_sounds[j].source_index = -1;
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                            break;
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                        }
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                    }
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                    // here we know that no-one is using that source so we can use it
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                    break;
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                }
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            }
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            if (i == sources_number) {
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                // this means all sources are busy
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            }
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            // set source properties that it will use when it's in playback
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            alSourcei (Sources[i], AL_BUFFER,   the_sounds[index].buffer);
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            alSourcef (Sources[i], AL_PITCH,    1.0f);
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            alSourcef (Sources[i], AL_GAIN,     1.0f);
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            alSourcefv(Sources[i], AL_POSITION, SourcePosition);
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            alSourcefv(Sources[i], AL_VELOCITY, SourceVelocity);
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            alSourcei (Sources[i], AL_LOOPING,  0);
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            if (AL_NO_ERROR != alGetError()) {
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                fprintf(stderr,"(Bridge ERROR) - failed to set Source properties\n");
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                return;
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            }
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            the_sounds[index].source_index = i;
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        }
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        alSourcePlay(Sources[the_sounds[index].source_index]);
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        if (AL_NO_ERROR != alGetError()) {
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            fprintf(stderr,"(Bridge Warning) - failed to play sound %d\n", index);
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            return;
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        }
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    }
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}
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void openal_toggleloop (uint32_t index) {
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    ALint loop;
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    if (openal_ready() == AL_TRUE && index < cache_size) {
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        alGetSourcei (Sources[the_sounds[index].source_index], AL_LOOPING, &loop);
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        alSourcei (Sources[the_sounds[index].source_index], AL_LOOPING, !((uint8_t) loop) & 0x00000001);
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    }
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}
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void openal_setvolume (uint32_t index, float gain) {
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    if (openal_ready() == AL_TRUE && index < cache_size)
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        alSourcef (Sources[the_sounds[index].source_index], AL_GAIN, gain);
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}
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void openal_setglobalvolume (float gain) {
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    if (openal_ready() == AL_TRUE)
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        alListenerf (AL_GAIN, gain);
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}
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void openal_togglemute () {
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    ALfloat gain;
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    if (openal_ready() == AL_TRUE) {
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        alGetListenerf (AL_GAIN, &gain);
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        if (gain > 0) {
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            old_gain = gain;
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            gain = 0;
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        } else
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            gain = old_gain;
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        alListenerf (AL_GAIN, gain);
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    }
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}
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// Fade in or out by calling a helper thread
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void openal_fade (uint32_t index, uint16_t quantity, al_fade_t direction) {
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#ifndef _WIN32
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    pthread_t thread;
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#else
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    HANDLE Thread;
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#endif
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    fade_t *fade;
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    if (openal_ready() == AL_TRUE && index < cache_size) {
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        fade = (fade_t*) Malloc(sizeof(fade_t));
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        fade->index = index;
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        fade->quantity = quantity;
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        fade->type = direction;
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#ifndef _WIN32
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        pthread_create(&thread, NULL, (void *)helper_fade, (void *)fade);
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        pthread_detach(thread);
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#else
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        Thread = (HANDLE) _beginthread((void *)helper_fade, 0, (void *)fade);
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#endif
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    }
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}
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void openal_setposition (uint32_t index, float x, float y, float z) {
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    if (openal_ready() == AL_TRUE && index < cache_size)
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        alSource3f(Sources[the_sounds[index].source_index], AL_POSITION, x, y, z);;
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}
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void helper_fade(void *tmp) {
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    ALfloat gain;
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    ALfloat target_gain;
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    fade_t *fade;
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    uint32_t index;
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    uint16_t quantity;
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    al_fade_t type;
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    fade = tmp;
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    index = fade->index;
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    quantity = fade->quantity;
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    type = fade->type;
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    free (fade);
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    if (type == AL_FADE_IN) {
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#ifdef DEBUG
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        fprintf(stderr,"(Bridge Info) - Fade-in in progress [index %d quantity %d]", index, quantity);
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#endif
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        // save the volume desired after the fade
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        alGetSourcef(Sources[the_sounds[index].source_index], AL_GAIN, &target_gain);
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        if (target_gain > 1.0f || target_gain <= 0.0f)
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            target_gain = 1.0f;
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        for (gain = 0.0f ; gain <= target_gain; gain += (float) quantity/10000) {
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#ifdef TRACE
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            fprintf(stderr,"(Bridge Debug) - Fade-in set gain to %f\n", gain);
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#endif
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            alSourcef(Sources[the_sounds[index].source_index], AL_GAIN, gain);
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            usleep(10000);
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        }
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    } else {
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        alGetSourcef(Sources[the_sounds[index].source_index], AL_GAIN, &target_gain);
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        for (gain = target_gain; gain >= 0.00f; gain -= (float) quantity/10000) {
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#ifdef TRACE
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            fprintf(stderr,"(Bridge Debug) - Fade-out set gain to %f\n", gain);
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#endif
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            alSourcef(Sources[the_sounds[index].source_index], AL_GAIN, gain);
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            usleep(10000);
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        }
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        if (AL_NO_ERROR != alGetError())
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            fprintf(stderr,"(Bridge Warning) - Failed to set fade-out effect\n");
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        // stop that sound and reset its volume
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        alSourceStop (Sources[the_sounds[index].source_index]);
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        alSourcef (Sources[the_sounds[index].source_index], AL_GAIN, target_gain);
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    }
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    if (AL_NO_ERROR != alGetError())
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        fprintf(stderr,"(Bridge Warning) - Failed to set fade effect\n");
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#ifndef _WIN32
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    pthread_exit(NULL);
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#else
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    _endthread();
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#endif
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}
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