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-rw-r--r--src/audioOutputs/audioOutput_oss.c238
1 files changed, 234 insertions, 4 deletions
diff --git a/src/audioOutputs/audioOutput_oss.c b/src/audioOutputs/audioOutput_oss.c
index 70ae04695..b3ad9bff4 100644
--- a/src/audioOutputs/audioOutput_oss.c
+++ b/src/audioOutputs/audioOutput_oss.c
@@ -52,20 +52,211 @@ typedef struct _OssData {
int sampleRate;
int bitFormat;
int bits;
+ int * supported[3];
+ int numSupported[3];
+ int * unsupported[3];
+ int numUnsupported[3];
} OssData;
+#define OSS_SUPPORTED 1
+#define OSS_UNSUPPORTED 0
+#define OSS_UNKNOWN -1
+
+#define OSS_RATE 0
+#define OSS_CHANNELS 1
+#define OSS_BITS 2
+
+static int getIndexForParam(int param) {
+ int index = 0;
+
+ switch(param) {
+ case SNDCTL_DSP_SPEED:
+ index = OSS_RATE;
+ break;
+ case SNDCTL_DSP_CHANNELS:
+ index = OSS_CHANNELS;
+ break;
+ case SNDCTL_DSP_SAMPLESIZE:
+ index = OSS_BITS;
+ break;
+ }
+
+ return index;
+}
+
+static int findSupportedParam(OssData * od, int param, int val) {
+ int i;
+ int index = getIndexForParam(param);
+
+ for(i = 0; i < od->numSupported[index]; i++) {
+ if(od->supported[index][i] == val) return 1;
+ }
+
+ return 0;
+}
+
+static int canConvert(int index, int val) {
+ switch(index) {
+ case OSS_BITS:
+ if(val!=16) return 0;
+ break;
+ case OSS_CHANNELS:
+ if(val!=2) return 0;
+ break;
+ }
+
+ return 1;
+}
+
+static int getSupportedParam(OssData * od, int param, int val) {
+ int i;
+ int index = getIndexForParam(param);
+ int ret = -1;
+ int least = val;
+ int diff;
+
+ for(i = 0; i < od->numSupported[index]; i++) {
+ diff = od->supported[index][i]-val;
+ if(diff < 0) diff = -diff;
+ if(diff < least) {
+ if(!canConvert(index, od->supported[index][i])) {
+ continue;
+ }
+ least = diff;
+ ret = od->supported[index][i];
+ }
+ }
+
+ return ret;
+}
+
+static int findUnsupportedParam(OssData * od, int param, int val) {
+ int i;
+ int index = getIndexForParam(param);
+
+ for(i = 0; i < od->numUnsupported[index]; i++) {
+ if(od->unsupported[index][i] == val) return 1;
+ }
+
+ return 0;
+}
+
+static void addSupportedParam(OssData * od, int param, int val) {
+ int index = getIndexForParam(param);
+
+ od->numSupported[index]++;
+ od->supported[index] = realloc(od->supported[index],
+ od->numSupported[index]*sizeof(int));
+ od->supported[index][od->numSupported[index]-1] = val;
+}
+
+static void addUnsupportedParam(OssData * od, int param, int val) {
+ int index = getIndexForParam(param);
+
+ od->numUnsupported[index]++;
+ od->unsupported[index] = realloc(od->unsupported[index],
+ od->numUnsupported[index]*sizeof(int));
+ od->unsupported[index][od->numUnsupported[index]-1] = val;
+}
+
+static void removeSupportedParam(OssData * od, int param, int val) {
+ int i = 0;
+ int j = 0;
+ int index = getIndexForParam(param);
+
+ for(i = 0; i < od->numSupported[index]-1; i++) {
+ if(od->supported[index][i] == val) j = 1;
+ od->supported[index][i] = od->supported[index][i+j];
+ }
+
+ od->numSupported[index]--;
+ od->supported[index] = realloc(od->supported[index],
+ od->numSupported[index]*sizeof(int));
+}
+
+static void removeUnsupportedParam(OssData * od, int param, int val) {
+ int i = 0;
+ int j = 0;
+ int index = getIndexForParam(param);
+
+ for(i = 0; i < od->numUnsupported[index]-1; i++) {
+ if(od->unsupported[index][i] == val) j = 1;
+ od->unsupported[index][i] = od->unsupported[index][i+j];
+ }
+
+ od->numUnsupported[index]--;
+ od->unsupported[index] = realloc(od->unsupported[index],
+ od->numUnsupported[index]*sizeof(int));
+}
+
+static int isSupportedParam(OssData * od, int param, int val) {
+ if(findSupportedParam(od, param, val)) return OSS_SUPPORTED;
+ if(findUnsupportedParam(od, param, val)) return OSS_UNSUPPORTED;
+ return OSS_UNKNOWN;
+}
+
+static void supportParam(OssData * od, int param, int val) {
+ int supported = isSupportedParam(od, param, val);
+
+ if(supported == OSS_SUPPORTED) return;
+
+ if(supported == OSS_UNSUPPORTED) {
+ removeUnsupportedParam(od, param, val);
+ }
+
+ addSupportedParam(od, param, val);
+}
+
+static void unsupportParam(OssData * od, int param, int val) {
+ int supported = isSupportedParam(od, param, val);
+
+ if(supported == OSS_UNSUPPORTED) return;
+
+ if(supported == OSS_SUPPORTED) {
+ removeSupportedParam(od, param, val);
+ }
+
+ addUnsupportedParam(od, param, val);
+}
+
static OssData * newOssData() {
OssData * ret = malloc(sizeof(OssData));
ret->device = NULL;
ret->fd = -1;
+ ret->supported[OSS_RATE] = NULL;
+ ret->supported[OSS_CHANNELS] = NULL;
+ ret->supported[OSS_BITS] = NULL;
+ ret->unsupported[OSS_RATE] = NULL;
+ ret->unsupported[OSS_CHANNELS] = NULL;
+ ret->unsupported[OSS_BITS] = NULL;
+
+ ret->numSupported[OSS_RATE] = 0;
+ ret->numSupported[OSS_CHANNELS] = 0;
+ ret->numSupported[OSS_BITS] = 0;
+ ret->numUnsupported[OSS_RATE] = 0;
+ ret->numUnsupported[OSS_CHANNELS] = 0;
+ ret->numUnsupported[OSS_BITS] = 0;
+
+ supportParam(ret, SNDCTL_DSP_SPEED, 48000);
+ supportParam(ret, SNDCTL_DSP_SPEED, 44100);
+ supportParam(ret, SNDCTL_DSP_CHANNELS, 2);
+ supportParam(ret, SNDCTL_DSP_SAMPLESIZE, 16);
+
return ret;
}
static void freeOssData(OssData * od) {
if(od->device) free(od->device);
+ if(od->supported[OSS_RATE]) free(od->supported[OSS_RATE]);
+ if(od->supported[OSS_CHANNELS]) free(od->supported[OSS_CHANNELS]);
+ if(od->supported[OSS_BITS]) free(od->supported[OSS_BITS]);
+ if(od->unsupported[OSS_RATE]) free(od->unsupported[OSS_RATE]);
+ if(od->unsupported[OSS_CHANNELS]) free(od->unsupported[OSS_CHANNELS]);
+ if(od->unsupported[OSS_BITS]) free(od->unsupported[OSS_BITS]);
+
free(od);
}
@@ -158,6 +349,35 @@ static void oss_finishDriver(AudioOutput * audioOutput) {
freeOssData(od);
}
+static int setParam(OssData * od, int param, int * value) {
+ int val = *value;
+ int copy;
+ int supported = isSupportedParam(od, param, val);
+
+ do {
+ if(supported == OSS_UNSUPPORTED) {
+ val = getSupportedParam(od, param, val);
+ if(copy < 0) return -1;
+ }
+ copy = val;
+ if(ioctl(od->fd, param, &copy)) {
+ unsupportParam(od, param, val);
+ supported = OSS_UNSUPPORTED;
+ }
+ else {
+ if(supported == OSS_UNKNOWN) {
+ supportParam(od, param, val);
+ supported = OSS_SUPPORTED;
+ }
+ val = copy;
+ }
+ } while( supported == OSS_UNSUPPORTED );
+
+ *value = val;
+
+ return 0;
+}
+
static int oss_open(AudioOutput * audioOutput) {
OssData * od = audioOutput->data;
@@ -174,7 +394,7 @@ static int oss_open(AudioOutput * audioOutput) {
goto fail;
}
- if(ioctl(od->fd, SNDCTL_DSP_CHANNELS, &od->channels)) {
+ if(setParam(od, SNDCTL_DSP_CHANNELS, &od->channels)) {
ERROR("OSS device \"%s\" does not support %i channels: %s\n",
od->device,
od->channels,
@@ -182,7 +402,7 @@ static int oss_open(AudioOutput * audioOutput) {
goto fail;
}
- if(ioctl(od->fd, SNDCTL_DSP_SPEED, &od->sampleRate)) {
+ if(setParam(od, SNDCTL_DSP_SPEED, &od->sampleRate)) {
ERROR("OSS device \"%s\" does not support %i Hz audio: %s\n",
od->device,
od->sampleRate,
@@ -190,7 +410,7 @@ static int oss_open(AudioOutput * audioOutput) {
goto fail;
}
- if(ioctl(od->fd, SNDCTL_DSP_SAMPLESIZE, &od->bits)) {
+ if(setParam(od, SNDCTL_DSP_SAMPLESIZE, &od->bits)) {
ERROR("OSS device \"%s\" does not support %i bit audio: %s\n",
od->device,
od->bits,
@@ -210,6 +430,7 @@ fail:
static int oss_openDevice(AudioOutput * audioOutput)
{
+ int ret = -1;
OssData * od = audioOutput->data;
AudioFormat * audioFormat = &audioOutput->outAudioFormat;
#ifdef WORDS_BIGENDIAN
@@ -221,7 +442,16 @@ static int oss_openDevice(AudioOutput * audioOutput)
od->sampleRate = audioFormat->sampleRate;
od->bits = audioFormat->bits;
- return oss_open(audioOutput);
+ ret = oss_open(audioOutput);
+
+ audioFormat->channels = od->channels;
+ audioFormat->sampleRate = od->sampleRate;
+ audioFormat->bits = od->bits;
+
+ DEBUG("oss device \"%s\" will be playing %i channel audio at %i Hz\n",
+ od->device, od->channels, od->sampleRate);
+
+ return ret;
}
static void oss_closeDevice(AudioOutput * audioOutput) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 23:12:32 +0000