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testsurround: Add surround sound channel tester

main
Cameron Gutman 2021-10-29 01:11:59 -05:00 committed by Sam Lantinga
parent 27369b3e40
commit cd66c050fe
7 changed files with 430 additions and 0 deletions
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1
.gitignore vendored
View File

@ -157,6 +157,7 @@ test/testshape
test/testsprite2
test/testspriteminimal
test/teststreaming
test/testsurround
test/testthread
test/testtimer
test/testurl

11
VisualC/SDL.sln
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@ -56,6 +56,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testyuv", "tests\testyuv\te
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testsensor", "tests\testsensor\testsensor.vcxproj", "{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testsurround", "tests\testsurround\testsurround.vcxproj", "{70B894A9-E306-49E8-ABC2-932A952A5E5F}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Win32 = Debug|Win32
@ -280,6 +282,14 @@ Global
{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Release|Win32.Build.0 = Release|Win32
{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Release|x64.ActiveCfg = Release|x64
{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Release|x64.Build.0 = Release|x64
{70B894A9-E306-49E8-ABC2-932A952A5E5F}.Debug|Win32.ActiveCfg = Debug|Win32
{70B894A9-E306-49E8-ABC2-932A952A5E5F}.Debug|Win32.Build.0 = Debug|Win32
{70B894A9-E306-49E8-ABC2-932A952A5E5F}.Debug|x64.ActiveCfg = Debug|x64
{70B894A9-E306-49E8-ABC2-932A952A5E5F}.Debug|x64.Build.0 = Debug|x64
{70B894A9-E306-49E8-ABC2-932A952A5E5F}.Release|Win32.ActiveCfg = Release|Win32
{70B894A9-E306-49E8-ABC2-932A952A5E5F}.Release|Win32.Build.0 = Release|Win32
{70B894A9-E306-49E8-ABC2-932A952A5E5F}.Release|x64.ActiveCfg = Release|x64
{70B894A9-E306-49E8-ABC2-932A952A5E5F}.Release|x64.Build.0 = Release|x64
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
@ -309,6 +319,7 @@ Global
{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A5} = {D69D5741-611F-4E14-8541-1FEE94F50B5A}
{40FB7794-D3C3-4CFE-BCF4-A80C97635682} = {D69D5741-611F-4E14-8541-1FEE94F50B5A}
{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4} = {D69D5741-611F-4E14-8541-1FEE94F50B5A}
{70B894A9-E306-49E8-ABC2-932A952A5E5F} = {D69D5741-611F-4E14-8541-1FEE94F50B5A}
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {C320C9F2-1A8F-41D7-B02B-6338F872BCAD}

210
VisualC/tests/testsurround/testsurround.vcxproj Normal file
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@ -0,0 +1,210 @@
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<PropertyGroup Label="Globals">
<ProjectGuid>{70B894A9-E306-49E8-ABC2-932A952A5E5F}</ProjectGuid>
<RootNamespace>testsurround</RootNamespace>
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1
test/CMakeLists.txt
View File

@ -23,6 +23,7 @@ add_executable(checkkeys checkkeys.c)
add_executable(checkkeysthreads checkkeysthreads.c)
add_executable(loopwave loopwave.c)
add_executable(loopwavequeue loopwavequeue.c)
add_executable(testsurround testsurround.c)
add_executable(testresample testresample.c)
add_executable(testaudioinfo testaudioinfo.c)

4
test/Makefile.in
View File

@ -62,6 +62,7 @@ TARGETS = \
testsprite2$(EXE) \
testspriteminimal$(EXE) \
teststreaming$(EXE) \
testsurround$(EXE) \
testthread$(EXE) \
testtimer$(EXE) \
testurl$(EXE) \
@ -95,6 +96,9 @@ loopwave$(EXE): $(srcdir)/loopwave.c
loopwavequeue$(EXE): $(srcdir)/loopwavequeue.c
$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
testsurround$(EXE): $(srcdir)/testsurround.c
$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
testresample$(EXE): $(srcdir)/testresample.c
$(CC) -o $@ $^ $(CFLAGS) $(LIBS)

1
test/README
View File

@ -4,6 +4,7 @@ These are test programs for the SDL library:
checkkeys Watch the key events to check the keyboard
loopwave Audio test -- loop playing a WAV file
loopwavequeue Audio test -- loop playing a WAV file with SDL_QueueAudio
testsurround Audio test -- play test tone on each audio channel
testaudioinfo Lists audio device capabilities
testerror Tests multi-threaded error handling
testfile Tests RWops layer

202
test/testsurround.c Normal file
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@ -0,0 +1,202 @@
/*
Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely.
*/
/* Program to test surround sound audio channels */
#include "SDL_config.h"
#include <stdio.h>
#include <stdlib.h>
#include "SDL.h"
static int total_channels;
static int active_channel;
#define SAMPLE_RATE_HZ 48000
#define CHANNEL_TEST_TIME_SEC 5
#define MAX_AMPLITUDE SDL_MAX_SINT16
#define SINE_FREQ_HZ 500
#define LFE_SINE_FREQ_HZ 50
/* The channel layout is defined in SDL_audio.h */
const char*
get_channel_name(int channel_index, int channel_count)
{
switch (channel_index) {
case 0:
return "Front Left";
case 1:
return "Front Right";
case 2:
switch (channel_count) {
case 3:
return "Low Frequency Effects";
case 4:
return "Back Left";
default:
return "Front Center";
}
case 3:
switch (channel_count) {
case 4:
return "Back Right";
case 5:
return "Back Left";
default:
return "Low Frequency Effects";
}
case 4:
switch (channel_count) {
case 5:
return "Back Right";
case 7:
return "Back Center";
case 6:
case 8:
return "Back Left";
}
case 5:
switch (channel_count) {
case 7:
return "Back Left";
case 6:
case 8:
return "Back Right";
}
case 6:
switch (channel_count) {
case 7:
return "Back Right";
case 8:
return "Side Left";
}
case 7:
return "Side Right";
}
return NULL;
}
SDL_bool
is_lfe_channel(int channel_index, int channel_count)
{
return (channel_count == 3 && channel_index == 2) || (channel_count >= 6 && channel_index == 3);
}
void SDLCALL
fill_buffer(void* unused, Uint8* stream, int len)
{
Sint16* buffer = (Sint16*)stream;
int samples = len / sizeof(int16_t);
static int total_samples = 0;
int i;
SDL_memset(stream, 0, len);
/* This can happen for a short time when switching devices */
if (active_channel == total_channels) {
return;
}
/* Play a sine wave on the active channel only */
for (i = active_channel; i < samples; i += total_channels) {
float time = (float)total_samples++ / SAMPLE_RATE_HZ;
int sine_freq = is_lfe_channel(active_channel, total_channels) ? LFE_SINE_FREQ_HZ : SINE_FREQ_HZ;
int amplitude;
/* Gradually ramp up and down to avoid audible pops when switching between channels */
if (total_samples < SAMPLE_RATE_HZ) {
amplitude = total_samples * MAX_AMPLITUDE / SAMPLE_RATE_HZ;
} else if (total_samples > (CHANNEL_TEST_TIME_SEC - 1) * SAMPLE_RATE_HZ) {
amplitude = (CHANNEL_TEST_TIME_SEC * SAMPLE_RATE_HZ - total_samples) * MAX_AMPLITUDE / SAMPLE_RATE_HZ;
} else {
amplitude = MAX_AMPLITUDE;
}
buffer[i] = (Sint16)(SDL_sin(6.283185f * sine_freq * time) * amplitude);
/* Reset our state for next callback if this channel test is finished */
if (total_samples == CHANNEL_TEST_TIME_SEC * SAMPLE_RATE_HZ) {
total_samples = 0;
active_channel++;
break;
}
}
}
int
main(int argc, char *argv[])
{
int i;
/* Enable standard application logging */
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
if (SDL_Init(SDL_INIT_AUDIO) < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
return 1;
}
/* Show the list of available drivers */
SDL_Log("Available audio drivers:");
for (i = 0; i < SDL_GetNumAudioDrivers(); ++i) {
SDL_Log("%i: %s", i, SDL_GetAudioDriver(i));
}
SDL_Log("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
for (i = 0; i < SDL_GetNumAudioDevices(0); i++) {
const char *devname = SDL_GetAudioDeviceName(i, 0);
int j;
SDL_AudioSpec spec;
SDL_AudioDeviceID dev;
if (SDL_GetAudioDeviceSpec(i, 0, &spec) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_GetAudioSpec() failed: %s\n", SDL_GetError());
continue;
}
spec.freq = SAMPLE_RATE_HZ;
spec.format = AUDIO_S16SYS;
spec.samples = 4096;
spec.callback = fill_buffer;
dev = SDL_OpenAudioDevice(devname, 0, &spec, NULL, 0);
if (dev == 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_OpenAudioDevice() failed: %s\n", SDL_GetError());
continue;
}
SDL_Log("Testing audio device: %s (%d channels)\n", devname, spec.channels);
/* These are used by the fill_buffer callback */
total_channels = spec.channels;
active_channel = 0;
SDL_PauseAudioDevice(dev, 0);
for (j = 0; j < total_channels; j++) {
int sine_freq = is_lfe_channel(j, total_channels) ? LFE_SINE_FREQ_HZ : SINE_FREQ_HZ;
SDL_Log("Playing %d Hz test tone on channel: %s\n", sine_freq, get_channel_name(j, total_channels));
/* fill_buffer() will increment the active channel */
SDL_Delay(CHANNEL_TEST_TIME_SEC * 1000);
}
SDL_CloseAudioDevice(dev);
}
SDL_Quit();
return 0;
}