From 41b1ba146a3742f70f9a0a6b7de3e5811d95d16c Mon Sep 17 00:00:00 2001 From: Chris Robinson Date: Wed, 31 Oct 2012 22:39:57 -0700 Subject: [PATCH] Add an example to get and show the source latency --- CMakeLists.txt | 8 +- examples/allatency.c | 213 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 220 insertions(+), 1 deletion(-) create mode 100644 examples/allatency.c diff --git a/CMakeLists.txt b/CMakeLists.txt index bcb1fa10..d793eed6 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -834,7 +834,13 @@ IF(EXAMPLES) TARGET_LINK_LIBRARIES(alreverb ${FFMPEG_LIBRARIES} ${LIBNAME}) SET_TARGET_PROPERTIES(alreverb PROPERTIES COMPILE_FLAGS "${FFMPEG_CFLAGS}") - INSTALL(TARGETS alstream alreverb + ADD_EXECUTABLE(allatency examples/common/alhelpers.c + examples/common/alffmpeg.c + examples/allatency.c) + TARGET_LINK_LIBRARIES(allatency ${FFMPEG_LIBRARIES} ${LIBNAME}) + SET_TARGET_PROPERTIES(allatency PROPERTIES COMPILE_FLAGS "${FFMPEG_CFLAGS}") + + INSTALL(TARGETS alstream alreverb allatency RUNTIME DESTINATION bin LIBRARY DESTINATION "lib${LIB_SUFFIX}" ARCHIVE DESTINATION "lib${LIB_SUFFIX}" diff --git a/examples/allatency.c b/examples/allatency.c new file mode 100644 index 00000000..48bf5b51 --- /dev/null +++ b/examples/allatency.c @@ -0,0 +1,213 @@ +/* + * OpenAL Source Latency Example + * + * Copyright (c) 2012 by Chris Robinson + * + * 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 checking the latency of a sound. */ + +#include +#include +#ifdef _WIN32 +#define WIN32_LEAN_AND_MEAN +#include +#else +#include +#define Sleep(x) usleep((x)*1000) +#endif + +#include "AL/al.h" +#include "AL/alc.h" +#include "AL/alext.h" + +#include "common/alhelpers.h" +#include "common/alffmpeg.h" + + +LPALBUFFERSAMPLESSOFT alBufferSamplesSOFT = wrap_BufferSamples; +LPALISBUFFERFORMATSUPPORTEDSOFT alIsBufferFormatSupportedSOFT; + +LPALSOURCEDSOFT alSourcedSOFT; +LPALSOURCE3DSOFT alSource3dSOFT; +LPALSOURCEDVSOFT alSourcedvSOFT; +LPALGETSOURCEDSOFT alGetSourcedSOFT; +LPALGETSOURCE3DSOFT alGetSource3dSOFT; +LPALGETSOURCEDVSOFT alGetSourcedvSOFT; +LPALSOURCEI64SOFT alSourcei64SOFT; +LPALSOURCE3I64SOFT alSource3i64SOFT; +LPALSOURCEI64VSOFT alSourcei64vSOFT; +LPALGETSOURCEI64SOFT alGetSourcei64SOFT; +LPALGETSOURCE3I64SOFT alGetSource3i64SOFT; +LPALGETSOURCEI64VSOFT alGetSourcei64vSOFT; + +/* LoadBuffer loads the named audio file into an OpenAL buffer object, and + * returns the new buffer ID. */ +static ALuint LoadSound(const char *filename) +{ + ALenum err, format, type, channels; + ALuint rate, buffer; + size_t datalen; + void *data; + FilePtr audiofile; + StreamPtr sound; + + /* Open the file and get the first stream from it */ + audiofile = openAVFile(filename); + sound = getAVAudioStream(audiofile, 0); + if(!sound) + { + fprintf(stderr, "Could not open audio in %s\n", filename); + closeAVFile(audiofile); + return 0; + } + + /* Get the sound format, and figure out the OpenAL format */ + if(getAVAudioInfo(sound, &rate, &channels, &type) != 0) + { + fprintf(stderr, "Error getting audio info for %s\n", filename); + closeAVFile(audiofile); + return 0; + } + + format = GetFormat(channels, type, alIsBufferFormatSupportedSOFT); + if(format == AL_NONE) + { + fprintf(stderr, "Unsupported format (%s, %s) for %s\n", + ChannelsName(channels), TypeName(type), filename); + closeAVFile(audiofile); + return 0; + } + + /* Decode the whole audio stream to a buffer. */ + data = decodeAVAudioStream(sound, &datalen); + if(!data) + { + fprintf(stderr, "Failed to read audio from %s\n", filename); + closeAVFile(audiofile); + return 0; + } + + /* Buffer the audio data into a new buffer object, then free the data and + * close the file. */ + buffer = 0; + alGenBuffers(1, &buffer); + alBufferSamplesSOFT(buffer, rate, format, BytesToFrames(datalen, channels, type), + channels, type, data); + free(data); + closeAVFile(audiofile); + + /* 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(alIsBuffer(buffer)) + alDeleteBuffers(1, &buffer); + return 0; + } + + return buffer; +} + + +int main(int argc, char **argv) +{ + ALuint source, buffer; + ALdouble offsets[2]; + ALenum state; + + /* Print out usage if no file was specified */ + if(argc < 2) + { + fprintf(stderr, "Usage: %s \n", argv[0]); + return 1; + } + + /* Initialize OpenAL with the default device, and check for EFX support. */ + if(InitAL() != 0) + return 1; + + if(!alIsExtensionPresent("AL_SOFT_source_latency")) + { + fprintf(stderr, "Error: AL_SOFT_source_latency not supported\n"); + CloseAL(); + return 1; + } + + /* Define a macro to help load the function pointers. */ +#define LOAD_PROC(x) ((x) = alGetProcAddress(#x)) + LOAD_PROC(alSourcedSOFT); + LOAD_PROC(alSource3dSOFT); + LOAD_PROC(alSourcedvSOFT); + LOAD_PROC(alGetSourcedSOFT); + LOAD_PROC(alGetSource3dSOFT); + LOAD_PROC(alGetSourcedvSOFT); + LOAD_PROC(alSourcei64SOFT); + LOAD_PROC(alSource3i64SOFT); + LOAD_PROC(alSourcei64vSOFT); + LOAD_PROC(alGetSourcei64SOFT); + LOAD_PROC(alGetSource3i64SOFT); + LOAD_PROC(alGetSourcei64vSOFT); + + if(alIsExtensionPresent("AL_SOFT_buffer_samples")) + { + LOAD_PROC(alBufferSamplesSOFT); + LOAD_PROC(alIsBufferFormatSupportedSOFT); + } +#undef LOAD_PROC + + /* Load the sound into a buffer. */ + buffer = LoadSound(argv[1]); + if(!buffer) + { + 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 { + Sleep(10); + alGetSourcei(source, AL_SOURCE_STATE, &state); + + /* Get the source offset and latency. AL_SEC_OFFSET_LATENCY_SOFT will + * place the offset (in seconds) in offsets[0], and the time until that + * offset will be heard (in seconds) in offsets[1]. */ + alGetSourcedvSOFT(source, AL_SEC_OFFSET_LATENCY_SOFT, offsets); + printf("\rOffset: %f - Latency:%3u ms ", offsets[0], (ALuint)(offsets[1]*1000)); + fflush(stdout); + } while(alGetError() == AL_NO_ERROR && state == AL_PLAYING); + printf("\n"); + + /* All done. Delete resources, and close OpenAL. */ + alDeleteSources(1, &source); + alDeleteBuffers(1, &buffer); + + CloseAL(); + + return 0; +} -- 2.11.4.GIT