diff options
| -rw-r--r-- | CMakeLists.txt | 9 | ||||
| -rw-r--r-- | examples/alplay.c | 177 |
2 files changed, 185 insertions, 1 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 8055146f..fb65489f 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -1495,6 +1495,13 @@ IF(ALSOFT_EXAMPLES) IF(SDL_SOUND_FOUND) SET(EX_COMMON_OBJS examples/common/alhelpers.c) + ADD_EXECUTABLE(alplay examples/alplay.c ${COMMON_OBJS} ${EX_COMMON_OBJS}) + TARGET_LINK_LIBRARIES(alplay ${SDL_SOUND_LIBRARIES} ${SDL2_LIBRARY} OpenAL) + SET_PROPERTY(TARGET alplay APPEND PROPERTY COMPILE_FLAGS ${EXTRA_CFLAGS}) + SET_PROPERTY(TARGET alplay APPEND PROPERTY + INCLUDE_DIRECTORIES ${SDL2_INCLUDE_DIR} ${SDL_SOUND_INCLUDE_DIR} + ) + ADD_EXECUTABLE(alstream examples/alstream.c ${COMMON_OBJS} ${EX_COMMON_OBJS}) TARGET_LINK_LIBRARIES(alstream ${SDL_SOUND_LIBRARIES} ${SDL2_LIBRARY} OpenAL) SET_PROPERTY(TARGET alstream APPEND PROPERTY COMPILE_FLAGS ${EXTRA_CFLAGS}) @@ -1531,7 +1538,7 @@ IF(ALSOFT_EXAMPLES) ) IF(ALSOFT_INSTALL) - INSTALL(TARGETS alstream alreverb allatency alloopback alhrtf + INSTALL(TARGETS alplay alstream alreverb allatency alloopback alhrtf RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} diff --git a/examples/alplay.c b/examples/alplay.c new file mode 100644 index 00000000..81cb56d5 --- /dev/null +++ b/examples/alplay.c @@ -0,0 +1,177 @@ +/* + * OpenAL Source Play Example + * + * Copyright (c) 2017 by Chris Robinson <[email protected]> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +/* This file contains an example for playing a sound buffer. */ + +#include <stdio.h> +#include <assert.h> + +#include <SDL_sound.h> + +#include "AL/al.h" +#include "AL/alc.h" + +#include "common/alhelpers.h" + + +/* LoadBuffer loads the named audio file into an OpenAL buffer object, and + * returns the new buffer ID. + */ +static ALuint LoadSound(const char *filename) +{ + Sound_Sample *sample; + ALenum err, format; + ALuint buffer; + Uint32 slen; + + /* Open the audio file */ + sample = Sound_NewSampleFromFile(filename, NULL, 65536); + if(!sample) + { + fprintf(stderr, "Could not open audio in %s\n", filename); + return 0; + } + + /* Get the sound format, and figure out the OpenAL format */ + if(sample->actual.channels == 1) + { + if(sample->actual.format == AUDIO_U8) + format = AL_FORMAT_MONO8; + else if(sample->actual.format == AUDIO_S16SYS) + format = AL_FORMAT_MONO16; + else + { + fprintf(stderr, "Unsupported sample format: 0x%04x\n", sample->actual.format); + Sound_FreeSample(sample); + return 0; + } + } + else if(sample->actual.channels == 2) + { + if(sample->actual.format == AUDIO_U8) + format = AL_FORMAT_STEREO8; + else if(sample->actual.format == AUDIO_S16SYS) + format = AL_FORMAT_STEREO16; + else + { + fprintf(stderr, "Unsupported sample format: 0x%04x\n", sample->actual.format); + Sound_FreeSample(sample); + return 0; + } + } + else + { + fprintf(stderr, "Unsupported channel count: %d\n", sample->actual.channels); + Sound_FreeSample(sample); + return 0; + } + + /* Decode the whole audio stream to a buffer. */ + slen = Sound_DecodeAll(sample); + if(!sample->buffer || slen == 0) + { + fprintf(stderr, "Failed to read audio from %s\n", filename); + Sound_FreeSample(sample); + return 0; + } + + /* Buffer the audio data into a new buffer object, then free the data and + * close the file. */ + buffer = 0; + alGenBuffers(1, &buffer); + alBufferData(buffer, format, sample->buffer, slen, sample->actual.rate); + Sound_FreeSample(sample); + + /* Check if an error occured, and clean up if so. */ + err = alGetError(); + if(err != AL_NO_ERROR) + { + fprintf(stderr, "OpenAL Error: %s\n", alGetString(err)); + if(buffer && alIsBuffer(buffer)) + alDeleteBuffers(1, &buffer); + return 0; + } + + return buffer; +} + + +int main(int argc, char **argv) +{ + ALuint source, buffer; + ALfloat offset; + ALenum state; + + /* Print out usage if no arguments were specified */ + if(argc < 2) + { + fprintf(stderr, "Usage: %s [-device <name>] <filename>\n", argv[0]); + return 1; + } + + /* Initialize OpenAL. */ + argv++; argc--; + if(InitAL(&argv, &argc) != 0) + return 1; + + /* Initialize SDL_sound. */ + Sound_Init(); + + /* Load the sound into a buffer. */ + buffer = LoadSound(argv[0]); + if(!buffer) + { + Sound_Quit(); + CloseAL(); + return 1; + } + + /* Create the source to play the sound with. */ + source = 0; + alGenSources(1, &source); + alSourcei(source, AL_BUFFER, buffer); + assert(alGetError()==AL_NO_ERROR && "Failed to setup sound source"); + + /* Play the sound until it finishes. */ + alSourcePlay(source); + do { + al_nssleep(10000000); + alGetSourcei(source, AL_SOURCE_STATE, &state); + + /* Get the source offset. */ + alGetSourcef(source, AL_SEC_OFFSET, &offset); + printf("\rOffset: %f ", offset); + fflush(stdout); + } while(alGetError() == AL_NO_ERROR && state == AL_PLAYING); + printf("\n"); + + /* All done. Delete resources, and close down SDL_sound and OpenAL. */ + alDeleteSources(1, &source); + alDeleteBuffers(1, &buffer); + + Sound_Quit(); + CloseAL(); + + return 0; +} |