frodovdr/vdr-plugin-softhddevice
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Add ac3 pass-through device to OSS module.

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This commit is contained in:
Johns 2012-01-23 20:23:05 +01:00
parent 5f43803236
commit 217545542d
2 changed files with 42 additions and 15 deletions
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2
README.txt
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@ -88,6 +88,8 @@ Setup: environment
only if oss is configured only if oss is configured
OSS_AUDIODEV=/dev/dsp OSS_AUDIODEV=/dev/dsp
oss dsp device name oss dsp device name
OSS_AC3_AUDIODEV=
oss AC3/pass-though device name
OSS_MIXERDEV=/dev/mixer OSS_MIXERDEV=/dev/mixer
oss mixer device name oss mixer device name
OSS_MIXER_CHANNEL=pcm OSS_MIXER_CHANNEL=pcm

55
audio.c
View File

@ -1441,6 +1441,32 @@ static void OssThreadFlushBuffers(void)
//---------------------------------------------------------------------------- //----------------------------------------------------------------------------
/**
** Open OSS pcm device.
**
** @param use_ac3 use ac3/pass-through device
*/
static int OssOpenPCM(int use_ac3)
{
const char *device;
int fildes;
// &&|| hell
if (!(use_ac3 && ((device = AudioAC3Device)
|| (device = getenv("OSS_AC3_AUDIODEV"))))
&& !(device = AudioPCMDevice) && !(device = getenv("OSS_AUDIODEV"))) {
device = "/dev/dsp";
}
Debug(3, "audio/oss: &&|| hell '%s'\n", device);
if ((fildes = open(device, O_WRONLY)) < 0) {
Error(_("audio/oss: can't open dsp device '%s': %s\n"), device,
strerror(errno));
return -1;
}
return fildes;
}
/** /**
** Initialize OSS pcm device. ** Initialize OSS pcm device.
** **
@ -1448,19 +1474,9 @@ static void OssThreadFlushBuffers(void)
*/ */
static void OssInitPCM(void) static void OssInitPCM(void)
{ {
const char *device;
int fildes; int fildes;
if (!(device = AudioPCMDevice)) { fildes = OssOpenPCM(0);
if (!(device = getenv("OSS_AUDIODEV"))) {
device = "/dev/dsp";
}
}
if ((fildes = open(device, O_WRONLY)) < 0) {
Error(_("audio/oss: can't open dsp device '%s': %s\n"), device,
strerror(errno));
return;
}
OssPcmFildes = fildes; OssPcmFildes = fildes;
} }
@ -1601,8 +1617,7 @@ static uint64_t OssGetDelay(void)
** **
** @todo audio changes must be queued and done when the buffer is empty ** @todo audio changes must be queued and done when the buffer is empty
*/ */
static int OssSetup(int *freq, int *channels, __attribute__ ((unused)) static int OssSetup(int *freq, int *channels, int use_ac3)
int use_ac3)
{ {
int ret; int ret;
int tmp; int tmp;
@ -1613,6 +1628,18 @@ static int OssSetup(int *freq, int *channels, __attribute__ ((unused))
// flush any buffered data // flush any buffered data
AudioFlushBuffers(); AudioFlushBuffers();
if (1) { // close+open for pcm / ac3
int fildes;
fildes = OssPcmFildes;
OssPcmFildes = -1;
close(fildes);
if (!(fildes = OssOpenPCM(use_ac3))) {
return -1;
}
OssPcmFildes = fildes;
}
ret = 0; ret = 0;
tmp = AFMT_S16_NE; // native 16 bits tmp = AFMT_S16_NE; // native 16 bits
@ -1701,8 +1728,6 @@ static int OssSetup(int *freq, int *channels, __attribute__ ((unused))
/** /**
** Initialize OSS audio output module. ** Initialize OSS audio output module.
**
** @param use_ac3 use ac3/pass-through device
*/ */
static void OssInit(void) static void OssInit(void)
{ {