🛠️🐜 Antkeeper superbuild with dependencies included
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217 lines
7.0 KiB
217 lines
7.0 KiB
/*
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* OpenAL Source Latency Example
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*
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* Copyright (c) 2012 by Chris Robinson <chris.kcat@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/* This file contains an example for checking the latency of a sound. */
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#include <assert.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "sndfile.h"
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#include "AL/al.h"
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#include "AL/alext.h"
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#include "common/alhelpers.h"
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static LPALSOURCEDSOFT alSourcedSOFT;
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static LPALSOURCE3DSOFT alSource3dSOFT;
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static LPALSOURCEDVSOFT alSourcedvSOFT;
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static LPALGETSOURCEDSOFT alGetSourcedSOFT;
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static LPALGETSOURCE3DSOFT alGetSource3dSOFT;
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static LPALGETSOURCEDVSOFT alGetSourcedvSOFT;
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static LPALSOURCEI64SOFT alSourcei64SOFT;
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static LPALSOURCE3I64SOFT alSource3i64SOFT;
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static LPALSOURCEI64VSOFT alSourcei64vSOFT;
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static LPALGETSOURCEI64SOFT alGetSourcei64SOFT;
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static LPALGETSOURCE3I64SOFT alGetSource3i64SOFT;
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static LPALGETSOURCEI64VSOFT alGetSourcei64vSOFT;
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/* LoadBuffer loads the named audio file into an OpenAL buffer object, and
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* returns the new buffer ID.
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*/
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static ALuint LoadSound(const char *filename)
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{
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ALenum err, format;
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ALuint buffer;
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SNDFILE *sndfile;
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SF_INFO sfinfo;
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short *membuf;
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sf_count_t num_frames;
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ALsizei num_bytes;
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/* Open the audio file and check that it's usable. */
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sndfile = sf_open(filename, SFM_READ, &sfinfo);
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if(!sndfile)
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{
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fprintf(stderr, "Could not open audio in %s: %s\n", filename, sf_strerror(sndfile));
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return 0;
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}
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if(sfinfo.frames < 1 || sfinfo.frames > (sf_count_t)(INT_MAX/sizeof(short))/sfinfo.channels)
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{
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fprintf(stderr, "Bad sample count in %s (%" PRId64 ")\n", filename, sfinfo.frames);
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sf_close(sndfile);
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return 0;
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}
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/* Get the sound format, and figure out the OpenAL format */
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format = AL_NONE;
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if(sfinfo.channels == 1)
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format = AL_FORMAT_MONO16;
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else if(sfinfo.channels == 2)
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format = AL_FORMAT_STEREO16;
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else if(sfinfo.channels == 3)
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{
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if(sf_command(sndfile, SFC_WAVEX_GET_AMBISONIC, NULL, 0) == SF_AMBISONIC_B_FORMAT)
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format = AL_FORMAT_BFORMAT2D_16;
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}
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else if(sfinfo.channels == 4)
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{
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if(sf_command(sndfile, SFC_WAVEX_GET_AMBISONIC, NULL, 0) == SF_AMBISONIC_B_FORMAT)
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format = AL_FORMAT_BFORMAT3D_16;
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}
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if(!format)
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{
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fprintf(stderr, "Unsupported channel count: %d\n", sfinfo.channels);
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sf_close(sndfile);
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return 0;
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}
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/* Decode the whole audio file to a buffer. */
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membuf = malloc((size_t)(sfinfo.frames * sfinfo.channels) * sizeof(short));
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num_frames = sf_readf_short(sndfile, membuf, sfinfo.frames);
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if(num_frames < 1)
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{
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free(membuf);
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sf_close(sndfile);
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fprintf(stderr, "Failed to read samples in %s (%" PRId64 ")\n", filename, num_frames);
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return 0;
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}
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num_bytes = (ALsizei)(num_frames * sfinfo.channels) * (ALsizei)sizeof(short);
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/* Buffer the audio data into a new buffer object, then free the data and
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* close the file.
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*/
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buffer = 0;
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alGenBuffers(1, &buffer);
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alBufferData(buffer, format, membuf, num_bytes, sfinfo.samplerate);
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free(membuf);
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sf_close(sndfile);
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/* Check if an error occured, and clean up if so. */
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err = alGetError();
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if(err != AL_NO_ERROR)
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{
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fprintf(stderr, "OpenAL Error: %s\n", alGetString(err));
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if(buffer && alIsBuffer(buffer))
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alDeleteBuffers(1, &buffer);
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return 0;
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}
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return buffer;
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}
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int main(int argc, char **argv)
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{
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ALuint source, buffer;
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ALdouble offsets[2];
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ALenum state;
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/* Print out usage if no arguments were specified */
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if(argc < 2)
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{
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fprintf(stderr, "Usage: %s [-device <name>] <filename>\n", argv[0]);
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return 1;
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}
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/* Initialize OpenAL, and check for source_latency support. */
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argv++; argc--;
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if(InitAL(&argv, &argc) != 0)
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return 1;
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if(!alIsExtensionPresent("AL_SOFT_source_latency"))
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{
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fprintf(stderr, "Error: AL_SOFT_source_latency not supported\n");
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CloseAL();
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return 1;
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}
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/* Define a macro to help load the function pointers. */
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#define LOAD_PROC(T, x) ((x) = FUNCTION_CAST(T, alGetProcAddress(#x)))
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LOAD_PROC(LPALSOURCEDSOFT, alSourcedSOFT);
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LOAD_PROC(LPALSOURCE3DSOFT, alSource3dSOFT);
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LOAD_PROC(LPALSOURCEDVSOFT, alSourcedvSOFT);
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LOAD_PROC(LPALGETSOURCEDSOFT, alGetSourcedSOFT);
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LOAD_PROC(LPALGETSOURCE3DSOFT, alGetSource3dSOFT);
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LOAD_PROC(LPALGETSOURCEDVSOFT, alGetSourcedvSOFT);
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LOAD_PROC(LPALSOURCEI64SOFT, alSourcei64SOFT);
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LOAD_PROC(LPALSOURCE3I64SOFT, alSource3i64SOFT);
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LOAD_PROC(LPALSOURCEI64VSOFT, alSourcei64vSOFT);
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LOAD_PROC(LPALGETSOURCEI64SOFT, alGetSourcei64SOFT);
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LOAD_PROC(LPALGETSOURCE3I64SOFT, alGetSource3i64SOFT);
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LOAD_PROC(LPALGETSOURCEI64VSOFT, alGetSourcei64vSOFT);
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#undef LOAD_PROC
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/* Load the sound into a buffer. */
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buffer = LoadSound(argv[0]);
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if(!buffer)
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{
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CloseAL();
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return 1;
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}
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/* Create the source to play the sound with. */
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source = 0;
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alGenSources(1, &source);
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alSourcei(source, AL_BUFFER, (ALint)buffer);
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assert(alGetError()==AL_NO_ERROR && "Failed to setup sound source");
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/* Play the sound until it finishes. */
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alSourcePlay(source);
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do {
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al_nssleep(10000000);
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alGetSourcei(source, AL_SOURCE_STATE, &state);
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/* Get the source offset and latency. AL_SEC_OFFSET_LATENCY_SOFT will
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* place the offset (in seconds) in offsets[0], and the time until that
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* offset will be heard (in seconds) in offsets[1]. */
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alGetSourcedvSOFT(source, AL_SEC_OFFSET_LATENCY_SOFT, offsets);
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printf("\rOffset: %f - Latency:%3u ms ", offsets[0], (ALuint)(offsets[1]*1000));
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fflush(stdout);
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} while(alGetError() == AL_NO_ERROR && state == AL_PLAYING);
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printf("\n");
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/* All done. Delete resources, and close down OpenAL. */
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alDeleteSources(1, &source);
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alDeleteBuffers(1, &buffer);
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CloseAL();
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return 0;
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}
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