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Code Issues Releases Wiki Activity

ao_openal: allow setting the OpenAL sub-device

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Now "-ao openal:device=<subdevice>" will pass <subdevice> as device to
OpenAL. This allows selecting both the OpenAL backend (OS-level audio
API) and the physical output device.

The available devices can be listed with "-ao openal:device=help".
This commit is contained in:
wm4 2012-03-13 00:24:38 +01:00
parent c48c0f453b
commit 00421e5eec
1 changed files with 28 additions and 2 deletions
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30
libao2/ao_openal.c
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@ -28,9 +28,11 @@
#ifdef OPENAL_AL_H
#include <OpenAL/alc.h>
#include <OpenAL/al.h>
#include <OpenAL/alext.h>
#else
#include <AL/alc.h>
#include <AL/al.h>
#include <AL/alext.h>
#endif
#include "mp_msg.h"
@ -86,11 +88,27 @@ static int control(int cmd, void *arg) {
static void print_help(void) {
mp_msg(MSGT_AO, MSGL_FATAL,
"\n-ao openal commandline help:\n"
"Example: mplayer -ao openal\n"
"Example: mplayer -ao openal:device=subdevice\n"
"\nOptions:\n"
" device=subdevice\n"
" Audio device OpenAL should use. Devices can be listed\n"
" with -ao openal:device=help\n"
);
}
static void list_devices(void) {
if (alcIsExtensionPresent(NULL, "ALC_ENUMERATE_ALL_EXT") != AL_TRUE) {
mp_msg(MSGT_AO, MSGL_FATAL, "Device listing not supported.\n");
return;
}
const char *list = alcGetString(NULL, ALC_ALL_DEVICES_SPECIFIER);
mp_msg(MSGT_AO, MSGL_FATAL, "OpenAL devices:\n");
while (list && *list) {
mp_msg(MSGT_AO, MSGL_FATAL, " '%s'\n", list);
list = list + strlen(list) + 1;
}
}
static int init(int rate, int channels, int format, int flags) {
float position[3] = {0, 0, 0};
float direction[6] = {0, 0, 1, 0, -1, 0};
@ -105,7 +123,9 @@ static int init(int rate, int channels, int format, int flags) {
ALCint freq = 0;
ALCint attribs[] = {ALC_FREQUENCY, rate, 0, 0};
int i;
char *device = NULL;
const opt_t subopts[] = {
{"device", OPT_ARG_MSTRZ, &device, NULL},
{NULL}
};
global_ao->no_persistent_volume = true;
@ -113,11 +133,15 @@ static int init(int rate, int channels, int format, int flags) {
print_help();
return 0;
}
if (strcmp(device, "help") == 0) {
list_devices();
goto err_out;
}
if (channels > MAX_CHANS) {
mp_msg(MSGT_AO, MSGL_FATAL, "[OpenAL] Invalid number of channels: %i\n", channels);
goto err_out;
}
dev = alcOpenDevice(NULL);
dev = alcOpenDevice(device);
if (!dev) {
mp_msg(MSGT_AO, MSGL_FATAL, "[OpenAL] could not open device\n");
goto err_out;
@ -146,9 +170,11 @@ static int init(int rate, int channels, int format, int flags) {
ao_data.buffersize = CHUNK_SIZE * NUM_BUF;
ao_data.outburst = channels * CHUNK_SIZE;
tmpbuf = malloc(CHUNK_SIZE);
free(device);
return 1;
err_out:
free(device);
return 0;
}