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e37d67725e
Though documentation and even a comment at the start of Mix_FreeChunk()
state that it's unsafe to free chunk which is still being played, the
function actually contains the code to stop all playback of a chunk which is
being freed. See SDL2_mixer 2.0.0, mixer.c:759:
/* Guarantee that this chunk isn't playing */
SDL_LockAudio();
if ( mix_channel ) {
for ( i=0; i<num_channels; ++i ) {
if ( chunk == mix_channel[i].chunk ) {
mix_channel[i].playing = 0;
mix_channel[i].looping = 0;
}
}
}
SDL_UnlockAudio();
As a result, no special actions are required to stop Mixer playback
before destruction of the Chunks (which is a common case with SDL2pp,
as Chunks may only be constructed after Mixer is created, and are
correspondingly destroyed in reverse order, e.g. before Mixer).
81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
/*
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libSDL2pp - C++11 bindings/wrapper for SDL2
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Copyright (C) 2015 Dmitry Marakasov <amdmi3@amdmi3.ru>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include <iostream>
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#include <SDL2/SDL.h>
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#include <SDL2/SDL_mixer.h>
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#include <SDL2pp/SDL.hh>
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#include <SDL2pp/SDLMixer.hh>
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#include <SDL2pp/Mixer.hh>
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#include <SDL2pp/Chunk.hh>
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using namespace SDL2pp;
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int main() try {
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SDL sdl(SDL_INIT_AUDIO);
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SDLMixer mixerlib(MIX_INIT_OGG);
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Mixer mixer(MIX_DEFAULT_FREQUENCY, MIX_DEFAULT_FORMAT, MIX_DEFAULT_CHANNELS, 4096);
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Chunk sound(TESTDATA_DIR "/test.ogg");
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mixer.ChannelFinished([](int channel){
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std::cerr << "Channel " << channel << " finished playback" << std::endl;
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});
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int chan;
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// Fade in
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chan = mixer.FadeInChannel(-1, sound, 0, 1000);
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std::cerr << "Fading sound in on channel " << chan << "\n";
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SDL_Delay(2000);
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// Mix 3 sounds
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chan = mixer.PlayChannel(-1, sound);
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std::cerr << "Playing sound on channel " << chan << "\n";
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SDL_Delay(250);
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chan = mixer.PlayChannel(-1, sound);
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std::cerr << "Playing sound on channel " << chan << "\n";
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SDL_Delay(250);
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chan = mixer.PlayChannel(-1, sound);
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std::cerr << "Playing sound on channel " << chan << "\n";
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SDL_Delay(2000);
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// Fade out
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chan = mixer.PlayChannel(-1, sound);
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std::cerr << "Fading out sound on channel " << chan << "\n";
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mixer.FadeOutChannel(chan, 2000);
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SDL_Delay(2000);
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return 0;
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} catch (std::exception& e) {
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std::cerr << "Error: " << e.what() << std::endl;
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return 1;
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}
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