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Add a simple non-streaming play example

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This commit is contained in:
Chris Robinson 2017-11-07 23:08:17 -08:00
parent 7c88e4a16b
commit 0e2e9e9a29
2 changed files with 185 additions and 1 deletions
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9
CMakeLists.txt
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@ -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}

177
examples/alplay.c Normal file
View File

@ -0,0 +1,177 @@
/*
* OpenAL Source Play Example
*
* Copyright (c) 2017 by Chris Robinson <chris.kcat@gmail.com>
*
* 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;
}