SDL.cpp revision 7324a5ab12cc734e2feb4cef8baeda26566d3c92
1b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten/* 2b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * Copyright (C) 2010 The Android Open Source Project 3b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * 4b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * Licensed under the Apache License, Version 2.0 (the "License"); 5b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * you may not use this file except in compliance with the License. 6b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * You may obtain a copy of the License at 7b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * 8b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * http://www.apache.org/licenses/LICENSE-2.0 9b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * 10b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * Unless required by applicable law or agreed to in writing, software 11b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * distributed under the License is distributed on an "AS IS" BASIS, 12b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * See the License for the specific language governing permissions and 14b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * limitations under the License. 15b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten */ 16b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 17b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten/* SDL platform implementation */ 18b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 19b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten#include "sles_allinclusive.h" 20b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 21b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten#ifdef USE_SDL 22b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 23b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kastenstatic void SDLCALL SDL_callback(void *context, Uint8 *stream, int len) 24b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten{ 25b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten assert(len > 0); 2600d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten IEngine *thisEngine = (IEngine *) context; 2700d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten // A peek would be risky if output mixes are dynamic, so we pause during switch and use shared 2800d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten interface_lock_shared(thisEngine); 2900d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten COutputMix *outputMix = thisEngine->mOutputMix; 3000d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten interface_unlock_shared(thisEngine); 3100d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten if (NULL != outputMix) { 3200d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten SLOutputMixExtItf OutputMixExt = &outputMix->mOutputMixExt.mItf; 3300d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten (*OutputMixExt)->FillBuffer(OutputMixExt, stream, (SLuint32) len); 3400d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten } else { 3500d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten memset(stream, 0, (size_t) len); 3600d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten } 37b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten} 38b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 3900d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kastenvoid SDL_start(IEngine *thisEngine) 40b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten{ 41b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten SDL_AudioSpec fmt; 42b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten fmt.freq = 44100; 43b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten fmt.format = AUDIO_S16; 44b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten fmt.channels = 2; 457324a5ab12cc734e2feb4cef8baeda26566d3c92Glenn Kasten#ifdef _WIN32 // FIXME Either a bug or a serious misunderstanding 467324a5ab12cc734e2feb4cef8baeda26566d3c92Glenn Kasten fmt.samples = 512; 477324a5ab12cc734e2feb4cef8baeda26566d3c92Glenn Kasten#else 48b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten fmt.samples = 256; 497324a5ab12cc734e2feb4cef8baeda26566d3c92Glenn Kasten#endif 50b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten fmt.callback = SDL_callback; 5100d2d554e04ac369367c903dbf53b975355d1bcdGlenn Kasten fmt.userdata = (void *) thisEngine; 52b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 53b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten if (SDL_OpenAudio(&fmt, NULL) < 0) { 54b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten fprintf(stderr, "Unable to open audio: %s\n", SDL_GetError()); 55b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten exit(1); 56b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten } 57b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten} 58b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 59b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten#endif // USE_SDL 60