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-rw-r--r--audio/ossaudio.c446
1 files changed, 292 insertions, 154 deletions
diff --git a/audio/ossaudio.c b/audio/ossaudio.c
index ceb81ce..42bffae 100644
--- a/audio/ossaudio.c
+++ b/audio/ossaudio.c
@@ -31,36 +31,26 @@
#include <sys/soundcard.h>
#endif
#include "qemu-common.h"
+#include "host-utils.h"
+#include "qemu-char.h"
#include "audio.h"
#define AUDIO_CAP "oss"
#include "audio_int.h"
-/* http://www.df.lth.se/~john_e/gems/gem002d.html */
-/* http://www.multi-platforms.com/Tips/PopCount.htm */
-uint32_t popcount (uint32_t u)
-{
- u = ((u&0x55555555) + ((u>>1)&0x55555555));
- u = ((u&0x33333333) + ((u>>2)&0x33333333));
- u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
- u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
- u = ( u&0x0000ffff) + (u>>16);
- return u;
-}
-
-inline uint32_t lsbindex (uint32_t u)
-{
- return popcount ((u&-u)-1);
-}
+#if defined OSS_GETVERSION && defined SNDCTL_DSP_POLICY
+#define USE_DSP_POLICY
+#endif
typedef struct OSSVoiceOut {
HWVoiceOut hw;
void *pcm_buf;
int fd;
+ int wpos;
int nfrags;
int fragsize;
int mmapped;
- int old_optr;
+ int pending;
} OSSVoiceOut;
typedef struct OSSVoiceIn {
@@ -69,7 +59,6 @@ typedef struct OSSVoiceIn {
int fd;
int nfrags;
int fragsize;
- int old_optr;
} OSSVoiceIn;
static struct {
@@ -79,13 +68,17 @@ static struct {
const char *devpath_out;
const char *devpath_in;
int debug;
+ int exclusive;
+ int policy;
} conf = {
.try_mmap = 0,
.nfrags = 4,
.fragsize = 4096,
.devpath_out = "/dev/dsp",
.devpath_in = "/dev/dsp",
- .debug = 0
+ .debug = 0,
+ .exclusive = 0,
+ .policy = 5
};
struct oss_params {
@@ -127,13 +120,42 @@ static void GCC_FMT_ATTR (3, 4) oss_logerr2 (
static void oss_anal_close (int *fdp)
{
- int err = close (*fdp);
+ int err;
+
+ qemu_set_fd_handler (*fdp, NULL, NULL, NULL);
+ err = close (*fdp);
if (err) {
oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
}
*fdp = -1;
}
+static void oss_helper_poll_out (void *opaque)
+{
+ (void) opaque;
+ audio_run ("oss_poll_out");
+}
+
+static void oss_helper_poll_in (void *opaque)
+{
+ (void) opaque;
+ audio_run ("oss_poll_in");
+}
+
+static int oss_poll_out (HWVoiceOut *hw)
+{
+ OSSVoiceOut *oss = (OSSVoiceOut *) hw;
+
+ return qemu_set_fd_handler (oss->fd, NULL, oss_helper_poll_out, NULL);
+}
+
+static int oss_poll_in (HWVoiceIn *hw)
+{
+ OSSVoiceIn *oss = (OSSVoiceIn *) hw;
+
+ return qemu_set_fd_handler (oss->fd, oss_helper_poll_in, NULL, NULL);
+}
+
static int oss_write (SWVoiceOut *sw, void *buf, int len)
{
return audio_pcm_sw_write (sw, buf, len);
@@ -218,17 +240,46 @@ static void oss_dump_info (struct oss_params *req, struct oss_params *obt)
}
#endif
+#ifdef USE_DSP_POLICY
+static int oss_get_version (int fd, int *version, const char *typ)
+{
+ if (ioctl (fd, OSS_GETVERSION, &version)) {
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+ /*
+ * Looks like atm (20100109) FreeBSD knows OSS_GETVERSION
+ * since 7.x, but currently only on the mixer device (or in
+ * the Linuxolator), and in the native version that part of
+ * the code is in fact never reached so the ioctl fails anyway.
+ * Until this is fixed, just check the errno and if its what
+ * FreeBSD's sound drivers return atm assume they are new enough.
+ */
+ if (errno == EINVAL) {
+ *version = 0x040000;
+ return 0;
+ }
+#endif
+ oss_logerr2 (errno, typ, "Failed to get OSS version\n");
+ return -1;
+ }
+ return 0;
+}
+#endif
+
static int oss_open (int in, struct oss_params *req,
struct oss_params *obt, int *pfd)
{
int fd;
- int mmmmssss;
+ int oflags = conf.exclusive ? O_EXCL : 0;
audio_buf_info abinfo;
int fmt, freq, nchannels;
+ int setfragment = 1;
const char *dspname = in ? conf.devpath_in : conf.devpath_out;
const char *typ = in ? "ADC" : "DAC";
- fd = open (dspname, (in ? O_RDONLY : O_WRONLY) | O_NONBLOCK);
+ /* Kludge needed to have working mmap on Linux */
+ oflags |= conf.try_mmap ? O_RDWR : (in ? O_RDONLY : O_WRONLY);
+
+ fd = open (dspname, oflags | O_NONBLOCK);
if (-1 == fd) {
oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
return -1;
@@ -259,11 +310,36 @@ static int oss_open (int in, struct oss_params *req,
goto err;
}
- mmmmssss = (req->nfrags << 16) | lsbindex (req->fragsize);
- if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
- oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
- req->nfrags, req->fragsize);
- goto err;
+#ifdef USE_DSP_POLICY
+ if (conf.policy >= 0) {
+ int version;
+
+ if (!oss_get_version (fd, &version, typ)) {
+ if (conf.debug) {
+ dolog ("OSS version = %#x\n", version);
+ }
+
+ if (version >= 0x040000) {
+ int policy = conf.policy;
+ if (ioctl (fd, SNDCTL_DSP_POLICY, &policy)) {
+ oss_logerr2 (errno, typ,
+ "Failed to set timing policy to %d\n",
+ conf.policy);
+ goto err;
+ }
+ setfragment = 0;
+ }
+ }
+ }
+#endif
+
+ if (setfragment) {
+ int mmmmssss = (req->nfrags << 16) | ctz32 (req->fragsize);
+ if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
+ oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
+ req->nfrags, req->fragsize);
+ goto err;
+ }
}
if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
@@ -305,26 +381,58 @@ static int oss_open (int in, struct oss_params *req,
return -1;
}
-static int oss_run_out (HWVoiceOut *hw)
+static void oss_write_pending (OSSVoiceOut *oss)
+{
+ HWVoiceOut *hw = &oss->hw;
+
+ if (oss->mmapped) {
+ return;
+ }
+
+ while (oss->pending) {
+ int samples_written;
+ ssize_t bytes_written;
+ int samples_till_end = hw->samples - oss->wpos;
+ int samples_to_write = audio_MIN (oss->pending, samples_till_end);
+ int bytes_to_write = samples_to_write << hw->info.shift;
+ void *pcm = advance (oss->pcm_buf, oss->wpos << hw->info.shift);
+
+ bytes_written = write (oss->fd, pcm, bytes_to_write);
+ if (bytes_written < 0) {
+ if (errno != EAGAIN) {
+ oss_logerr (errno, "failed to write %d bytes\n",
+ bytes_to_write);
+ }
+ break;
+ }
+
+ if (bytes_written & hw->info.align) {
+ dolog ("misaligned write asked for %d, but got %zd\n",
+ bytes_to_write, bytes_written);
+ return;
+ }
+
+ samples_written = bytes_written >> hw->info.shift;
+ oss->pending -= samples_written;
+ oss->wpos = (oss->wpos + samples_written) % hw->samples;
+ if (bytes_written - bytes_to_write) {
+ break;
+ }
+ }
+}
+
+static int oss_run_out (HWVoiceOut *hw, int live)
{
OSSVoiceOut *oss = (OSSVoiceOut *) hw;
- int err, rpos, live, decr;
- int samples;
- uint8_t *dst;
- struct st_sample *src;
+ int err, decr;
struct audio_buf_info abinfo;
struct count_info cntinfo;
int bufsize;
- live = audio_pcm_hw_get_live_out (hw);
- if (!live) {
- return 0;
- }
-
bufsize = hw->samples << hw->info.shift;
if (oss->mmapped) {
- int bytes;
+ int bytes, pos;
err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
if (err < 0) {
@@ -332,20 +440,8 @@ static int oss_run_out (HWVoiceOut *hw)
return 0;
}
- if (cntinfo.ptr == oss->old_optr) {
- if (abs (hw->samples - live) < 64) {
- dolog ("warning: Overrun\n");
- }
- return 0;
- }
-
- if (cntinfo.ptr > oss->old_optr) {
- bytes = cntinfo.ptr - oss->old_optr;
- }
- else {
- bytes = bufsize + cntinfo.ptr - oss->old_optr;
- }
-
+ pos = hw->rpos << hw->info.shift;
+ bytes = audio_ring_dist (cntinfo.ptr, pos, bufsize);
decr = audio_MIN (bytes >> hw->info.shift, live);
}
else {
@@ -358,7 +454,7 @@ static int oss_run_out (HWVoiceOut *hw)
if (abinfo.bytes > bufsize) {
if (conf.debug) {
dolog ("warning: Invalid available size, size=%d bufsize=%d\n"
- "please report your OS/audio hw to malc@pulsesoft.com\n",
+ "please report your OS/audio hw to av1474@comtv.ru\n",
abinfo.bytes, bufsize);
}
abinfo.bytes = bufsize;
@@ -378,53 +474,10 @@ static int oss_run_out (HWVoiceOut *hw)
}
}
- samples = decr;
- rpos = hw->rpos;
- while (samples) {
- int left_till_end_samples = hw->samples - rpos;
- int convert_samples = audio_MIN (samples, left_till_end_samples);
-
- src = hw->mix_buf + rpos;
- dst = advance (oss->pcm_buf, rpos << hw->info.shift);
-
- hw->clip (dst, src, convert_samples);
- if (!oss->mmapped) {
- int written;
+ decr = audio_pcm_hw_clip_out (hw, oss->pcm_buf, decr, oss->pending);
+ oss->pending += decr;
+ oss_write_pending (oss);
- written = write (oss->fd, dst, convert_samples << hw->info.shift);
- /* XXX: follow errno recommendations ? */
- if (written == -1) {
- oss_logerr (
- errno,
- "Failed to write %d bytes of audio data from %p\n",
- convert_samples << hw->info.shift,
- dst
- );
- continue;
- }
-
- if (written != convert_samples << hw->info.shift) {
- int wsamples = written >> hw->info.shift;
- int wbytes = wsamples << hw->info.shift;
- if (wbytes != written) {
- dolog ("warning: Misaligned write %d (requested %d), "
- "alignment %d\n",
- wbytes, written, hw->info.align + 1);
- }
- decr -= wsamples;
- rpos = (rpos + wsamples) % hw->samples;
- break;
- }
- }
-
- rpos = (rpos + convert_samples) % hw->samples;
- samples -= convert_samples;
- }
- if (oss->mmapped) {
- oss->old_optr = cntinfo.ptr;
- }
-
- hw->rpos = rpos;
return decr;
}
@@ -498,7 +551,7 @@ static int oss_init_out (HWVoiceOut *hw, struct audsettings *as)
oss->mmapped = 0;
if (conf.try_mmap) {
oss->pcm_buf = mmap (
- 0,
+ NULL,
hw->samples << hw->info.shift,
PROT_READ | PROT_WRITE,
MAP_SHARED,
@@ -508,7 +561,8 @@ static int oss_init_out (HWVoiceOut *hw, struct audsettings *as)
if (oss->pcm_buf == MAP_FAILED) {
oss_logerr (errno, "Failed to map %d bytes of DAC\n",
hw->samples << hw->info.shift);
- } else {
+ }
+ else {
int err;
int trig = 0;
if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
@@ -563,25 +617,48 @@ static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...)
int trig;
OSSVoiceOut *oss = (OSSVoiceOut *) hw;
- if (!oss->mmapped) {
- return 0;
- }
-
switch (cmd) {
case VOICE_ENABLE:
- ldebug ("enabling voice\n");
- audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples);
- trig = PCM_ENABLE_OUTPUT;
- if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
- oss_logerr (
- errno,
- "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
- );
- return -1;
+ {
+ va_list ap;
+ int poll_mode;
+
+ va_start (ap, cmd);
+ poll_mode = va_arg (ap, int);
+ va_end (ap);
+
+ ldebug ("enabling voice\n");
+ if (poll_mode && oss_poll_out (hw)) {
+ poll_mode = 0;
+ }
+ hw->poll_mode = poll_mode;
+
+ if (!oss->mmapped) {
+ return 0;
+ }
+
+ audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples);
+ trig = PCM_ENABLE_OUTPUT;
+ if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
+ oss_logerr (
+ errno,
+ "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
+ );
+ return -1;
+ }
}
break;
case VOICE_DISABLE:
+ if (hw->poll_mode) {
+ qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
+ hw->poll_mode = 0;
+ }
+
+ if (!oss->mmapped) {
+ return 0;
+ }
+
ldebug ("disabling voice\n");
trig = 0;
if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
@@ -671,8 +748,8 @@ static int oss_run_in (HWVoiceIn *hw)
int add;
int len;
} bufs[2] = {
- { hw->wpos, 0 },
- { 0, 0 }
+ { .add = hw->wpos, .len = 0 },
+ { .add = 0, .len = 0 }
};
if (!dead) {
@@ -687,7 +764,6 @@ static int oss_run_in (HWVoiceIn *hw)
bufs[0].len = dead << hwshift;
}
-
for (i = 0; i < 2; ++i) {
ssize_t nread;
@@ -737,8 +813,32 @@ static int oss_read (SWVoiceIn *sw, void *buf, int size)
static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...)
{
- (void) hw;
- (void) cmd;
+ OSSVoiceIn *oss = (OSSVoiceIn *) hw;
+
+ switch (cmd) {
+ case VOICE_ENABLE:
+ {
+ va_list ap;
+ int poll_mode;
+
+ va_start (ap, cmd);
+ poll_mode = va_arg (ap, int);
+ va_end (ap);
+
+ if (poll_mode && oss_poll_in (hw)) {
+ poll_mode = 0;
+ }
+ hw->poll_mode = poll_mode;
+ }
+ break;
+
+ case VOICE_DISABLE:
+ if (hw->poll_mode) {
+ hw->poll_mode = 0;
+ qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
+ }
+ break;
+ }
return 0;
}
@@ -753,45 +853,83 @@ static void oss_audio_fini (void *opaque)
}
static struct audio_option oss_options[] = {
- {"FRAGSIZE", AUD_OPT_INT, &conf.fragsize,
- "Fragment size in bytes", NULL, 0},
- {"NFRAGS", AUD_OPT_INT, &conf.nfrags,
- "Number of fragments", NULL, 0},
- {"MMAP", AUD_OPT_BOOL, &conf.try_mmap,
- "Try using memory mapped access", NULL, 0},
- {"DAC_DEV", AUD_OPT_STR, &conf.devpath_out,
- "Path to DAC device", NULL, 0},
- {"ADC_DEV", AUD_OPT_STR, &conf.devpath_in,
- "Path to ADC device", NULL, 0},
- {"DEBUG", AUD_OPT_BOOL, &conf.debug,
- "Turn on some debugging messages", NULL, 0},
- {NULL, 0, NULL, NULL, NULL, 0}
+ {
+ .name = "FRAGSIZE",
+ .tag = AUD_OPT_INT,
+ .valp = &conf.fragsize,
+ .descr = "Fragment size in bytes"
+ },
+ {
+ .name = "NFRAGS",
+ .tag = AUD_OPT_INT,
+ .valp = &conf.nfrags,
+ .descr = "Number of fragments"
+ },
+ {
+ .name = "MMAP",
+ .tag = AUD_OPT_BOOL,
+ .valp = &conf.try_mmap,
+ .descr = "Try using memory mapped access"
+ },
+ {
+ .name = "DAC_DEV",
+ .tag = AUD_OPT_STR,
+ .valp = &conf.devpath_out,
+ .descr = "Path to DAC device"
+ },
+ {
+ .name = "ADC_DEV",
+ .tag = AUD_OPT_STR,
+ .valp = &conf.devpath_in,
+ .descr = "Path to ADC device"
+ },
+ {
+ .name = "EXCLUSIVE",
+ .tag = AUD_OPT_BOOL,
+ .valp = &conf.exclusive,
+ .descr = "Open device in exclusive mode (vmix wont work)"
+ },
+#ifdef USE_DSP_POLICY
+ {
+ .name = "POLICY",
+ .tag = AUD_OPT_INT,
+ .valp = &conf.policy,
+ .descr = "Set the timing policy of the device, -1 to use fragment mode",
+ },
+#endif
+ {
+ .name = "DEBUG",
+ .tag = AUD_OPT_BOOL,
+ .valp = &conf.debug,
+ .descr = "Turn on some debugging messages"
+ },
+ { /* End of list */ }
};
static struct audio_pcm_ops oss_pcm_ops = {
- oss_init_out,
- oss_fini_out,
- oss_run_out,
- oss_write,
- oss_ctl_out,
-
- oss_init_in,
- oss_fini_in,
- oss_run_in,
- oss_read,
- oss_ctl_in
+ .init_out = oss_init_out,
+ .fini_out = oss_fini_out,
+ .run_out = oss_run_out,
+ .write = oss_write,
+ .ctl_out = oss_ctl_out,
+
+ .init_in = oss_init_in,
+ .fini_in = oss_fini_in,
+ .run_in = oss_run_in,
+ .read = oss_read,
+ .ctl_in = oss_ctl_in
};
struct audio_driver oss_audio_driver = {
- INIT_FIELD (name = ) "oss",
- INIT_FIELD (descr = ) "OSS audio (www.opensound.com)",
- INIT_FIELD (options = ) oss_options,
- INIT_FIELD (init = ) oss_audio_init,
- INIT_FIELD (fini = ) oss_audio_fini,
- INIT_FIELD (pcm_ops = ) &oss_pcm_ops,
- INIT_FIELD (can_be_default = ) 1,
- INIT_FIELD (max_voices_out = ) INT_MAX,
- INIT_FIELD (max_voices_in = ) INT_MAX,
- INIT_FIELD (voice_size_out = ) sizeof (OSSVoiceOut),
- INIT_FIELD (voice_size_in = ) sizeof (OSSVoiceIn)
+ .name = "oss",
+ .descr = "OSS http://www.opensound.com",
+ .options = oss_options,
+ .init = oss_audio_init,
+ .fini = oss_audio_fini,
+ .pcm_ops = &oss_pcm_ops,
+ .can_be_default = 1,
+ .max_voices_out = INT_MAX,
+ .max_voices_in = INT_MAX,
+ .voice_size_out = sizeof (OSSVoiceOut),
+ .voice_size_in = sizeof (OSSVoiceIn)
};
generated by cgit v1.1 at 2024-05-19 04:43:25 +0000