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-rw-r--r--desiredata/src/s_audio_alsa.c93
1 files changed, 28 insertions, 65 deletions
diff --git a/desiredata/src/s_audio_alsa.c b/desiredata/src/s_audio_alsa.c
index d3d1b3f1..21119641 100644
--- a/desiredata/src/s_audio_alsa.c
+++ b/desiredata/src/s_audio_alsa.c
@@ -167,37 +167,34 @@ static int alsaio_setup(t_alsa_dev *dev, int out, int *channels, int *rate, int
}
/* return 0 on success */
-int alsa_open_audio(
+static int alsa_open_audio(
int naudioindev, int * audioindev, int nchindev, int * chindev,
int naudiooutdev, int *audiooutdev, int nchoutdev, int *choutdev, int rate, int dummy) {
int err, inchans = 0, outchans = 0;
char devname[512];
int frag_size = (sys_blocksize ? sys_blocksize : ALSA_DEFFRAGSIZE);
- int nfrags, i, iodev, dev2;
+ int nfrags, i;
nfrags = int(sys_schedadvance * (float)rate / (1e6 * frag_size));
/* save our belief as to ALSA's buffer size for later */
alsa_buf_samps = nfrags * frag_size;
alsa_nindev = alsa_noutdev = 0;
alsa_jittermax = ALSA_DEFJITTERMAX;
if (sys_verbose) post("audio buffer set to %d", (int)(0.001 * sys_schedadvance));
- for (iodev = 0; iodev < naudioindev; iodev++) {
+ for (int iodev=0; iodev<naudioindev; iodev++) {
alsa_numbertoname(audioindev[iodev], devname, 512);
err = snd_pcm_open(&alsa_indev[alsa_nindev].a_handle, devname, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
check_error(err, "snd_pcm_open (input)");
- if (err < 0)
- continue;
+ if (err<0) continue;
alsa_indev[alsa_nindev].a_devno = audioindev[iodev];
snd_pcm_nonblock(alsa_indev[alsa_nindev].a_handle, 1);
- if (sys_verbose)
- post("opened input device name %s", devname);
+ if (sys_verbose) post("opened input device name %s", devname);
alsa_nindev++;
}
- for (iodev = 0; iodev < naudiooutdev; iodev++) {
+ for (int iodev=0; iodev<naudiooutdev; iodev++) {
alsa_numbertoname(audiooutdev[iodev], devname, 512);
err = snd_pcm_open(&alsa_outdev[alsa_noutdev].a_handle, devname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
check_error(err, "snd_pcm_open (output)");
- if (err < 0)
- continue;
+ if (err<0) continue;
alsa_outdev[alsa_noutdev].a_devno = audiooutdev[iodev];
snd_pcm_nonblock(alsa_outdev[alsa_noutdev].a_handle, 1);
alsa_noutdev++;
@@ -205,29 +202,28 @@ int naudiooutdev, int *audiooutdev, int nchoutdev, int *choutdev, int rate, int
if (!alsa_nindev && !alsa_noutdev) goto blewit;
/* If all the open devices support mmap_noninterleaved, let's call Wini's code in s_audio_alsamm.c */
alsa_usemmap = 1;
- for (iodev = 0; iodev < alsa_nindev ; iodev++) if (!alsaio_canmmap(&alsa_indev [iodev])) alsa_usemmap = 0;
- for (iodev = 0; iodev < alsa_noutdev; iodev++) if (!alsaio_canmmap(&alsa_outdev[iodev])) alsa_usemmap = 0;
+ for (int iodev=0; iodev<alsa_nindev ; iodev++) if (!alsaio_canmmap(&alsa_indev [iodev])) alsa_usemmap = 0;
+ for (int iodev=0; iodev<alsa_noutdev; iodev++) if (!alsaio_canmmap(&alsa_outdev[iodev])) alsa_usemmap = 0;
if (alsa_usemmap) {
post("using mmap audio interface");
if (alsamm_open_audio(rate)) goto blewit; else return 0;
}
- for (iodev = 0; iodev < alsa_nindev; iodev++) {
+ for (int iodev=0; iodev<alsa_nindev; iodev++) {
int channels = chindev[iodev];
if (alsaio_setup(&alsa_indev[iodev], 0, &channels, &rate, nfrags, frag_size) < 0) goto blewit;
inchans += channels;
}
- for (iodev = 0; iodev < alsa_noutdev; iodev++) {
+ for (int iodev=0; iodev<alsa_noutdev; iodev++) {
int channels = choutdev[iodev];
if (alsaio_setup(&alsa_outdev[iodev], 1, &channels, &rate, nfrags, frag_size) < 0) goto blewit;
outchans += channels;
}
- if (!inchans && !outchans)
- goto blewit;
- for (iodev = 0; iodev < alsa_nindev ; iodev++) snd_pcm_prepare( alsa_indev[iodev].a_handle);
- for (iodev = 0; iodev < alsa_noutdev; iodev++) snd_pcm_prepare(alsa_outdev[iodev].a_handle);
+ if (!inchans && !outchans) goto blewit;
+ for (int iodev=0; iodev<alsa_nindev ; iodev++) snd_pcm_prepare( alsa_indev[iodev].a_handle);
+ for (int iodev=0; iodev<alsa_noutdev; iodev++) snd_pcm_prepare(alsa_outdev[iodev].a_handle);
/* if duplex we can link the channels so they start together */
- for (iodev = 0; iodev < alsa_nindev; iodev++) {
- for (dev2 = 0; dev2 < alsa_noutdev; dev2++) {
+ for (int iodev=0; iodev<alsa_nindev; iodev++) {
+ for (int dev2=0; dev2<alsa_noutdev; dev2++) {
if (alsa_indev[iodev].a_devno == alsa_outdev[iodev].a_devno) {
snd_pcm_link(alsa_indev[iodev].a_handle,alsa_outdev[iodev].a_handle);
}
@@ -243,11 +239,11 @@ int naudiooutdev, int *audiooutdev, int nchoutdev, int *choutdev, int rate, int
if (outchans) {
i = (frag_size * nfrags)/sys_dacblocksize + 1;
while (i--) {
- for (iodev = 0; iodev < alsa_noutdev; iodev++)
+ for (int iodev=0; iodev<alsa_noutdev; iodev++)
snd_pcm_writei(alsa_outdev[iodev].a_handle, alsa_snd_buf, sys_dacblocksize);
}
} else if (inchans) {
- for (iodev = 0; iodev < alsa_nindev; iodev++)
+ for (int iodev=0; iodev<alsa_nindev; iodev++)
if ((err = snd_pcm_start(alsa_indev[iodev].a_handle)) < 0) check_error(err, "input start failed");
}
return 0;
@@ -258,12 +254,9 @@ blewit:
return 1;
}
-void alsa_close_audio() {
+static void alsa_close_audio() {
int err;
- if (alsa_usemmap) {
- alsamm_close_audio();
- return;
- }
+ if (alsa_usemmap) {alsamm_close_audio(); return;}
for (int iodev=0; iodev<alsa_nindev; iodev++) {
err = snd_pcm_close(alsa_indev[iodev].a_handle);
check_error(err, "snd_pcm_close (input)");
@@ -298,16 +291,17 @@ int alsa_send_dacs() {
callno++;
#endif
alsa_checkiosync(); /* check I/O are in sync and data not late */
- for (iodev = 0; iodev < alsa_nindev; iodev++) {
+ for (int iodev=0; iodev<alsa_nindev; iodev++) {
snd_pcm_status(alsa_indev[iodev].a_handle, alsa_status);
if (snd_pcm_status_get_avail(alsa_status) < transfersize) return SENDDACS_NO;
}
- for (iodev = 0; iodev < alsa_noutdev; iodev++) {
+ for (int iodev=0; iodev<alsa_noutdev; iodev++) {
snd_pcm_status(alsa_outdev[iodev].a_handle, alsa_status);
if (snd_pcm_status_get_avail(alsa_status) < transfersize) return SENDDACS_NO;
}
/* do output */
- for (iodev = 0, fp1 = sys_soundout, ch = 0; iodev < alsa_noutdev; iodev++) {
+ fp1 = sys_soundout; ch = 0;
+ for (int iodev=0; iodev<alsa_noutdev; iodev++) {
int thisdevchans = alsa_outdev[iodev].a_channels;
int chans = (chansouttogo < thisdevchans ? chansouttogo : thisdevchans);
chansouttogo -= chans;
@@ -340,10 +334,8 @@ int alsa_send_dacs() {
sys_log_error(ERR_DACSLEPT);
return SENDDACS_NO;
}
-
/* zero out the output buffer */
- memset(sys_soundout, 0, sys_dacblocksize * sizeof(*sys_soundout) *
- sys_outchannels);
+ memset(sys_soundout, 0, sys_dacblocksize * sizeof(*sys_soundout) * sys_outchannels);
if (sys_getrealtime() - timenow > 0.002) {
#ifdef DEBUG_ALSA_XFER
post("output %d took %d msec", callno, int(1000 * (timenow - timelast)));
@@ -412,42 +404,13 @@ void alsa_printstate() {
}
-void alsa_resync() {
- int i, result, iodev = 0;
- if (sys_audioapi != API_ALSA) {
- error("restart-audio: implemented for ALSA only.");
- return;
- }
- memset(alsa_snd_buf, 0, alsa_indev[iodev].a_sampwidth * sys_dacblocksize * sys_outchannels);
- for (i = 0; i < 1000000; i++) {
- result = snd_pcm_writei(alsa_outdev[iodev].a_handle, alsa_snd_buf, sys_dacblocksize);
- if (result != (int)sys_dacblocksize) break;
- }
- post("%d written", i);
-}
-
void alsa_putzeros(int iodev, int n) {
- int result;
memset(alsa_snd_buf, 0, alsa_outdev[iodev].a_sampwidth * sys_dacblocksize * alsa_outdev[iodev].a_channels);
- for (int i=0; i<n; i++) {
- result = snd_pcm_writei(alsa_outdev[iodev].a_handle, alsa_snd_buf, sys_dacblocksize);
-#if 0
- if (result != sys_dacblocksize) post("result %d", result);
-#endif
- }
- /* post ("putzeros %d", n); */
+ for (int i=0; i<n; i++) snd_pcm_writei(alsa_outdev[iodev].a_handle, alsa_snd_buf, sys_dacblocksize);
}
void alsa_getzeros(int iodev, int n) {
- int i, result;
- for (i = 0; i < n; i++) {
- result = snd_pcm_readi(alsa_indev[iodev].a_handle, alsa_snd_buf, sys_dacblocksize);
-#if 0
- if (result != sys_dacblocksize)
- post("result %d", result);
-#endif
- }
- /* post ("getzeros %d", n); */
+ for (int i=0; i<n; i++) snd_pcm_readi(alsa_indev[iodev].a_handle, alsa_snd_buf, sys_dacblocksize);
}
/* call this only if both input and output are open */
@@ -550,7 +513,7 @@ static void alsa_numbertoname(int devno, char *devname, int nchar) {
/* For each hardware card found, we list two devices, the "hard" and
"plug" one. The card scan is derived from portaudio code. */
-void alsa_getdevs(char *indevlist, int *nindevs, char *outdevlist, int *noutdevs, int *canmulti, int maxndev, int devdescsize) {
+static void alsa_getdevs(char *indevlist, int *nindevs, char *outdevlist, int *noutdevs, int *canmulti, int maxndev, int devdescsize) {
int ndev = 0, cardno = -1, i, j;
*canmulti = 2; /* supports multiple devices */
while (!snd_card_next(&cardno) && cardno >= 0) {
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-26 16:02:36 +0000