Dima353/openal-soft
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add a recording example app

Browse Source
This commit is contained in:
Chris Robinson
2017-06-23 05:19:24 -07:00
parent d1077795de
commit e07166e93c
2 changed files with 377 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
CMakeLists.txt
+14
View File
@@ -1409,6 +1409,20 @@ IF(ALSOFT_TESTS)
ENDIF()
IF(ALSOFT_EXAMPLES)
ADD_EXECUTABLE(alrecord examples/alrecord.c ${COMMON_OBJS})
TARGET_LINK_LIBRARIES(alrecord OpenAL)
SET_PROPERTY(TARGET alrecord APPEND PROPERTY COMPILE_FLAGS ${EXTRA_CFLAGS})
IF(ALSOFT_INSTALL)
INSTALL(TARGETS alrecord
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
)
ENDIF()
MESSAGE(STATUS "Building example programs")
IF(SDL2_FOUND)
IF(SDL_SOUND_FOUND)
SET(EX_COMMON_OBJS examples/common/alhelpers.c)
examples/alrecord.c
+363
View File
@@ -0,0 +1,363 @@
/*
* OpenAL Recording 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 a relatively simple recorder. */
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "AL/al.h"
#include "AL/alc.h"
#include "AL/alext.h"
#include "common/alhelpers.h"
#if defined(_WIN64)
#define SZFMT "%I64u"
#elif defined(_WIN32)
#define SZFMT "%u"
#else
#define SZFMT "%zu"
#endif
static void fwrite16le(ALushort val, FILE *f)
{
ALubyte data[2] = { val&0xff, (val>>8)&0xff };
fwrite(data, 1, 2, f);
}
static void fwrite32le(ALuint val, FILE *f)
{
ALubyte data[4] = { val&0xff, (val>>8)&0xff, (val>>16)&0xff, (val>>24)&0xff };
fwrite(data, 1, 4, f);
}
typedef struct Recorder {
ALCdevice *mDevice;
FILE *mFile;
long mDataSizeOffset;
size_t mDataSize;
float mRecTime;
int mChannels;
int mBits;
int mSampleRate;
size_t mFrameSize;
ALbyte *mBuffer;
ALsizei mBufferSize;
} Recorder;
int main(int argc, char **argv)
{
static const char optlist[] =
" --channels/-c <channels> Set channel count (1 or 2)\n"
" --bits/-b <bits> Set channel count (8 or 16)\n"
" --rate/-r <rate> Set sample rate (8000 to 96000)\n"
" --time/-t <time> Time in seconds to record (1 to 10)\n"
" --outfile/-o <filename> Output filename (default: record.wav)";
const char *fname = "record.wav";
const char *devname = NULL;
const char *progname;
Recorder recorder;
long total_size;
ALenum format;
ALCenum err;
progname = argv[0];
if(argc < 2)
{
fprintf(stderr, "Record from a device to a wav file.\n\n"
"Usage: %s [-device <name>] [options...]\n\n"
"Available options:\n%s\n", progname, optlist);
return 0;
}
recorder.mDevice = NULL;
recorder.mFile = NULL;
recorder.mDataSizeOffset = 0;
recorder.mDataSize = 0;
recorder.mRecTime = 4.0f;
recorder.mChannels = 1;
recorder.mBits = 16;
recorder.mSampleRate = 44100;
recorder.mFrameSize = recorder.mChannels * recorder.mBits / 8;
recorder.mBuffer = NULL;
recorder.mBufferSize = 0;
argv++; argc--;
if(argc > 1 && strcmp(argv[0], "-device") == 0)
{
devname = argv[1];
argv += 2;
argc -= 2;
}
while(argc > 0)
{
char *end;
if(strcmp(argv[0], "--") == 0)
break;
else if(strcmp(argv[0], "--channels") == 0 || strcmp(argv[0], "-c") == 0)
{
if(!(argc > 1))
{
fprintf(stderr, "Missing argument for option: %s\n", argv[0]);
return 1;
}
recorder.mChannels = strtol(argv[1], &end, 0);
if((recorder.mChannels != 1 && recorder.mChannels != 2) || (end && *end != '\0'))
{
fprintf(stderr, "Invalid channels: %s\n", argv[1]);
return 1;
}
argv += 2;
argc -= 2;
}
else if(strcmp(argv[0], "--bits") == 0 || strcmp(argv[0], "-b") == 0)
{
if(!(argc > 1))
{
fprintf(stderr, "Missing argument for option: %s\n", argv[0]);
return 1;
}
recorder.mBits = strtol(argv[1], &end, 0);
if((recorder.mBits != 8 && recorder.mBits != 16) || (end && *end != '\0'))
{
fprintf(stderr, "Invalid bit count: %s\n", argv[1]);
return 1;
}
argv += 2;
argc -= 2;
}
else if(strcmp(argv[0], "--rate") == 0 || strcmp(argv[0], "-r") == 0)
{
if(!(argc > 1))
{
fprintf(stderr, "Missing argument for option: %s\n", argv[0]);
return 1;
}
recorder.mSampleRate = strtol(argv[1], &end, 0);
if(!(recorder.mSampleRate >= 8000 && recorder.mSampleRate <= 96000) || (end && *end != '\0'))
{
fprintf(stderr, "Invalid sample rate: %s\n", argv[1]);
return 1;
}
argv += 2;
argc -= 2;
}
else if(strcmp(argv[0], "--time") == 0 || strcmp(argv[0], "-t") == 0)
{
if(!(argc > 1))
{
fprintf(stderr, "Missing argument for option: %s\n", argv[0]);
return 1;
}
recorder.mRecTime = strtod(argv[1], &end);
if(!(recorder.mRecTime >= 1.0f && recorder.mRecTime <= 10.0f) || (end && *end != '\0'))
{
fprintf(stderr, "Invalid record time: %s\n", argv[1]);
return 1;
}
argv += 2;
argc -= 2;
}
else if(strcmp(argv[0], "--outfile") == 0 || strcmp(argv[0], "-o") == 0)
{
if(!(argc > 1))
{
fprintf(stderr, "Missing argument for option: %s\n", argv[0]);
return 1;
}
fname = argv[1];
argv += 2;
argc -= 2;
}
else if(strcmp(argv[0], "--help") == 0 || strcmp(argv[0], "-h") == 0)
{
fprintf(stderr, "Record from a device to a wav file.\n\n"
"Usage: %s [-device <name>] [options...]\n\n"
"Available options:\n%s\n", progname, optlist);
return 0;
}
else
{
fprintf(stderr, "Invalid option '%s'.\n\n"
"Usage: %s [-device <name>] [options...]\n\n"
"Available options:\n%s\n", argv[0], progname, optlist);
return 0;
}
}
recorder.mFrameSize = recorder.mChannels * recorder.mBits / 8;
format = AL_NONE;
if(recorder.mChannels == 1)
{
if(recorder.mBits == 8)
format = AL_FORMAT_MONO8;
else if(recorder.mBits == 16)
format = AL_FORMAT_MONO16;
}
else if(recorder.mChannels == 2)
{
if(recorder.mBits == 8)
format = AL_FORMAT_STEREO8;
else if(recorder.mBits == 16)
format = AL_FORMAT_STEREO16;
}
recorder.mDevice = alcCaptureOpenDevice(devname, recorder.mSampleRate, format, 32768);
if(!recorder.mDevice)
{
fprintf(stderr, "Failed to open %s, %s %d-bit %dhz %d samples\n", devname?devname:"default device",
(recorder.mChannels == 1) ? "mono" : "stereo", recorder.mBits,recorder.mSampleRate,
32768
);
return 1;
}
fprintf(stderr, "Opened \"%s\"\n", alcGetString(
recorder.mDevice, ALC_CAPTURE_DEVICE_SPECIFIER
));
recorder.mFile = fopen(fname, "wb");
if(!recorder.mFile)
{
fprintf(stderr, "Failed to open '%s' for writing\n", fname);
alcCaptureCloseDevice(recorder.mDevice);
return 1;
}
fputs("RIFF", recorder.mFile);
fwrite32le(0xFFFFFFFF, recorder.mFile); // 'RIFF' header len; filled in at close
fputs("WAVE", recorder.mFile);
fputs("fmt ", recorder.mFile);
fwrite32le(18, recorder.mFile); // 'fmt ' header len
// 16-bit val, format type id
fwrite16le(0x0001, recorder.mFile);
// 16-bit val, channel count
fwrite16le(recorder.mChannels, recorder.mFile);
// 32-bit val, frequency
fwrite32le(recorder.mSampleRate, recorder.mFile);
// 32-bit val, bytes per second
fwrite32le(recorder.mSampleRate * recorder.mFrameSize, recorder.mFile);
// 16-bit val, frame size
fwrite16le(recorder.mFrameSize, recorder.mFile);
// 16-bit val, bits per sample
fwrite16le(recorder.mBits, recorder.mFile);
// 16-bit val, extra byte count
fwrite16le(0, recorder.mFile);
fputs("data", recorder.mFile);
fwrite32le(0xFFFFFFFF, recorder.mFile); // 'data' header len; filled in at close
recorder.mDataSizeOffset = ftell(recorder.mFile) - 4;
if(ferror(recorder.mFile) || recorder.mDataSizeOffset < 0)
{
fprintf(stderr, "Error writing header: %s\n", strerror(errno));
fclose(recorder.mFile);
alcCaptureCloseDevice(recorder.mDevice);
return 1;
}
fprintf(stderr, "Recording '%s', %s %d-bit %dhz, %f sec\n", fname,
(recorder.mChannels == 1) ? "mono" : "stereo", recorder.mBits,recorder.mSampleRate,
ceilf(recorder.mRecTime)
);
alcCaptureStart(recorder.mDevice);
while((double)recorder.mDataSize/(double)recorder.mSampleRate < recorder.mRecTime &&
(err=alcGetError(recorder.mDevice)) == ALC_NO_ERROR && !ferror(recorder.mFile))
{
ALCint count = 0;
fprintf(stderr, "\rCaptured "SZFMT" samples", recorder.mDataSize);
alcGetIntegerv(recorder.mDevice, ALC_CAPTURE_SAMPLES, 1, &count);
if(count < 1)
{
al_nssleep(10000000);
continue;
}
if(count > recorder.mBufferSize)
{
ALbyte *data = calloc(recorder.mFrameSize, count);
free(recorder.mBuffer);
recorder.mBuffer = data;
recorder.mBufferSize = count;
}
alcCaptureSamples(recorder.mDevice, recorder.mBuffer, count);
#if defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN
if(recorder.mBits == 16)
{
ALCint i;
/* Byteswap short samples on big-endian systems (wav needs little-
* endian, and OpenAL gives the system's native-endian).
*/
for(i = 0;i < count*recorder.mChannels;i++)
{
ALbyte b = recorder.mBuffer[i*2 + 0];
recorder.mBuffer[i*2 + 0] = recorder.mBuffer[i*2 + 1];
recorder.mBuffer[i*2 + 1] = b;
}
}
#endif
recorder.mDataSize += fwrite(recorder.mBuffer, recorder.mFrameSize, count, recorder.mFile);
}
alcCaptureStop(recorder.mDevice);
fprintf(stderr, "\rCaptured "SZFMT" samples\n", recorder.mDataSize);
if(err != ALC_NO_ERROR)
fprintf(stderr, "Got device error 0x%04x: %s\n", err, alcGetString(recorder.mDevice, err));
alcCaptureCloseDevice(recorder.mDevice);
recorder.mDevice = NULL;
free(recorder.mBuffer);
recorder.mBuffer = NULL;
recorder.mBufferSize = 0;
total_size = ftell(recorder.mFile);
if(fseek(recorder.mFile, recorder.mDataSizeOffset, SEEK_SET) == 0)
{
fwrite32le(recorder.mDataSize*recorder.mFrameSize, recorder.mFile);
if(fseek(recorder.mFile, 4, SEEK_SET) == 0)
fwrite32le(total_size - 8, recorder.mFile);
}
fclose(recorder.mFile);
recorder.mFile = NULL;
return 0;
}