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cVS: --------------------------------------------------------------------- 

added get/set_sound controls
stripped down initializing
changed play() again
outsourced xrun-handling
added some cases to get_space() as xrun-handling
added nonblock-mode
added mmap-mode
added subopts for mmap and noblock called mmap and noblock
could be accessed as -ao alsa9:noblock:mmap


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6634 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
joyping 2002-07-03 21:43:28 +00:00
parent 87de548153
commit a678a1018a
2 changed files with 812 additions and 396 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

604
libao2/ao_alsa1x.c
View File

@ -12,8 +12,8 @@
#include <errno.h>
#include <sys/time.h>
#include <stdlib.h>
//#include <unistd.h>
//#include <string.h>
#include <math.h>
#include <string.h>
#include "../config.h"
@ -48,24 +48,27 @@ static snd_pcm_hw_params_t *alsa_hwparams;
static snd_pcm_sw_params_t *alsa_swparams;
static char *alsa_device;
static int alsa_fragsize = OUTBURST; /* possible 4096, original 8192, OUTBURST is set statically to 512 in config.h but now its not used cause chunksize is allocated dynamically. */
/* possible 4096, original 8192, OUTBURST is set statically to 512 in config.h */
static int alsa_fragsize = 4096; //OUTBURST
static int alsa_fragcount = 8;
static int chunk_size = -1;
static int buffer_size = 0;
static int start_delay = 0;
static int stop_delay = 0;
static size_t bits_per_sample, bits_per_frame;
static size_t chunk_bytes;
int ao_mmap = 0;
int ao_noblock = 0;
static int open_mode;
static int set_block_mode;
#define ALSA_DEVICE_SIZE 48
#define BUFFERTIME /* last undef */
#undef SET_PERIOD /* only function now is to set chunksize staticaly, last defined */
#define SW_PARAMS /* last undef */
#undef BUFFERTIME
#define SET_CHUNKSIZE
snd_pcm_t *
spdif_init(int acard, int adevice)
{
//char *pcm_name = "hw:0,2"; /* first card second device */
@ -149,8 +152,8 @@ spdif_init(int acard, int adevice)
fprintf(stderr, "Broken configuration for this PCM: no configurations available");
return NULL;
}
err = snd_pcm_hw_params_set_access(handler, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
err = snd_pcm_hw_params_set_access(handler, params,SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0) {
fprintf(stderr, "Access tyep not available");
return NULL;
@ -186,7 +189,105 @@ spdif_init(int acard, int adevice)
/* to set/get/query special features/parameters */
static int control(int cmd, int arg)
{
return(CONTROL_UNKNOWN);
switch(cmd) {
case AOCONTROL_QUERY_FORMAT:
return CONTROL_TRUE;
case AOCONTROL_GET_VOLUME:
case AOCONTROL_SET_VOLUME:
{
ao_control_vol_t *vol = (ao_control_vol_t *)arg;
int err;
snd_mixer_t *handle;
snd_mixer_elem_t *elem;
snd_mixer_selem_id_t *sid;
const char *mix_name = "PCM";
char *card = "default";
long pmin, pmax;
long get_vol, set_vol;
float calc_vol, diff, f_multi;
if(ao_data.format == AFMT_AC3)
return CONTROL_TRUE;
//allocate simple id
snd_mixer_selem_id_alloca(&sid);
//sets simple-mixer index and name
snd_mixer_selem_id_set_index(sid, 0);
snd_mixer_selem_id_set_name(sid, mix_name);
if ((err = snd_mixer_open(&handle, 0)) < 0) {
printf("alsa-control: mixer open error: %s\n", snd_strerror(err));
return CONTROL_ERROR;
}
if ((err = snd_mixer_attach(handle, card)) < 0) {
printf("alsa-control: mixer attach %s error: %s", card, snd_strerror(err));
snd_mixer_close(handle);
return CONTROL_ERROR;
}
if ((err = snd_mixer_selem_register(handle, NULL, NULL)) < 0) {
printf("alsa-control: mixer register error: %s", snd_strerror(err));
snd_mixer_close(handle);
return CONTROL_ERROR;
}
err = snd_mixer_load(handle);
if (err < 0) {
printf("alsa-control: mixer load error: %s", snd_strerror(err));
snd_mixer_close(handle);
return CONTROL_ERROR;
}
elem = snd_mixer_find_selem(handle, sid);
if (!elem) {
printf("alsa-control: unable to find simple control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
snd_mixer_close(handle);
return CONTROL_ERROR;
}
snd_mixer_selem_get_playback_volume_range(elem,&pmin,&pmax);
f_multi = (100 / (float)pmax);
if (cmd == AOCONTROL_SET_VOLUME) {
diff = (vol->left+vol->right) / 2;
set_vol = rint(diff / f_multi);
if (set_vol < 0)
set_vol = 0;
else if (set_vol > pmax)
set_vol = pmax;
//setting channels
if ((err = snd_mixer_selem_set_playback_volume(elem, 0, set_vol)) < 0) {
printf("alsa-control: error setting left channel, %s",snd_strerror(err));
return CONTROL_ERROR;
}
if ((err = snd_mixer_selem_set_playback_volume(elem, 1, set_vol)) < 0) {
printf("alsa-control: error setting right channel, %s",snd_strerror(err));
return CONTROL_ERROR;
}
//printf("diff=%f, set_vol=%i, pmax=%i, mult=%f\n", diff, set_vol, pmax, f_multi);
}
else {
snd_mixer_selem_get_playback_volume(elem, 0, &get_vol);
calc_vol = get_vol;
calc_vol = rintf(calc_vol * f_multi);
vol->left = vol->right = (int)calc_vol;
//printf("get_vol = %i, calc=%i\n",get_vol, calc_vol);
}
snd_mixer_close(handle);
return CONTROL_OK;
}
}
return(CONTROL_UNKNOWN);
}
@ -198,11 +299,10 @@ static int init(int rate_hz, int channels, int format, int flags)
{
int err;
int cards = -1;
int period_val;
snd_pcm_info_t *alsa_info;
char *str_block_mode;
size_t xfer_align; //new
snd_pcm_uframes_t start_threshold, stop_threshold; //new
printf("alsa-init: testing and bugreports are welcome.\n");
printf("alsa-init: requested format: %d Hz, %d channels, %s\n", rate_hz,
channels, audio_out_format_name(format));
@ -223,7 +323,7 @@ static int init(int rate_hz, int channels, int format, int flags)
ao_data.format = format;
ao_data.channels = channels;
ao_data.outburst = OUTBURST;
ao_data.buffersize = 16384;
ao_data.buffersize = MAX_OUTBURST; // was 16384
switch (format)
{
@ -267,11 +367,49 @@ static int init(int rate_hz, int channels, int format, int flags)
audio_out_format_name(format));
return(0);
default:
break;
break;
}
if (ao_subdevice != NULL) // ?? makes no sense
alsa_device = ao_subdevice;
if (ao_subdevice) {
//start parsing ao_subdevice, ugly and not thread safe!
//maybe there's a better way?
int i2 = 1;
int i3 = 0;
char *sub_str;
char *token_str[3];
char* test_str = strdup(ao_subdevice);
//printf("subd=%s, test=%s\n", ao_subdevice,test_str);
if ((strcspn(ao_subdevice, ":")) > 0) {
sub_str = strtok(test_str, ":");
*(token_str) = sub_str;
while (((sub_str = strtok(NULL, ":")) != NULL) && (i2 <= 3)) {
*(token_str+i2) = sub_str;
//printf("token %i: %s\n", i2, *(token_str+i2));
i2 += 1;
}
for (i3=0; i3 <= i2-1; i3++) {
//printf("test %i, %s\n", i3, *(token_str+i3));
if (strcmp(*(token_str + i3), "mmap") == 0) {
ao_mmap = 1;
}
else if (strcmp(*(token_str+i3), "noblock") == 0) {
ao_noblock = 1;
}
else if (strcmp(*(token_str+i3), "hw") == 0) {
alsa_device = *(token_str+i3);
}
else if (!alsa_device || !ao_mmap || !ao_noblock) {
alsa_device = *(token_str+i3);
}
}
}
} //end parsing ao_subdevice
if (alsa_device == NULL)
{
@ -319,14 +457,46 @@ static int init(int rate_hz, int channels, int format, int flags)
// Try to initialize the SPDIF interface
alsa_handler = spdif_init(0, 2);
}
//setting modes for block or nonblock-mode
if (ao_noblock) {
open_mode = SND_PCM_NONBLOCK;
set_block_mode = 1;
str_block_mode = "nonblock-mode";
}
else {
open_mode = 0;
set_block_mode = 0;
str_block_mode = "block-mode";
}
//modes = 0, SND_PCM_NONBLOCK, SND_PCM_ASYNC
if (!alsa_handler) {
if ((err = snd_pcm_open(&alsa_handler,alsa_device,SND_PCM_STREAM_PLAYBACK,0)) < 0)
{
printf("alsa-init: playback open error: %s\n", snd_strerror(err));
return(0);
if ((err = snd_pcm_open(&alsa_handler, alsa_device, SND_PCM_STREAM_PLAYBACK, open_mode)) < 0)
{
if (ao_noblock) {
printf("alsa-init: open in nonblock-mode failed, trying to open in block-mode\n");
if ((err = snd_pcm_open(&alsa_handler, alsa_device, SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
printf("alsa-init: playback open error: %s\n", snd_strerror(err));
return(0);
} else {
set_block_mode = 0;
str_block_mode = "block-mode";
}
}
} else {
printf("alsa-init: playback open error: %s\n", snd_strerror(err));
return(0);
}
}
}
if ((err = snd_pcm_nonblock(alsa_handler, set_block_mode)) < 0) {
printf("alsa-init: error set block-mode %s\n", snd_strerror(err));
}
else if (verbose) {
printf("alsa-init: pcm opend in %s\n", str_block_mode);
}
snd_pcm_hw_params_alloca(&alsa_hwparams);
snd_pcm_sw_params_alloca(&alsa_swparams);
@ -339,12 +509,21 @@ static int init(int rate_hz, int channels, int format, int flags)
return(0);
}
if ((err = snd_pcm_hw_params_set_access(alsa_handler, alsa_hwparams,
SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
{
printf("alsa-init: unable to set access type: %s\n",
snd_strerror(err));
return(0);
if (ao_mmap) {
snd_pcm_access_mask_t *mask = alloca(snd_pcm_access_mask_sizeof());
snd_pcm_access_mask_none(mask);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_INTERLEAVED);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_NONINTERLEAVED);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_COMPLEX);
err = snd_pcm_hw_params_set_access_mask(alsa_handler, alsa_hwparams, mask);
printf("alsa-init: mmap set\n");
} else {
err = snd_pcm_hw_params_set_access(alsa_handler, alsa_hwparams,SND_PCM_ACCESS_RW_INTERLEAVED);
printf("alsa-init: interleave set\n");
}
if (err < 0) {
printf("alsa-init: unable to set access type: %s\n", snd_strerror(err));
return (0);
}
if ((err = snd_pcm_hw_params_set_format(alsa_handler, alsa_hwparams,
@ -367,21 +546,9 @@ static int init(int rate_hz, int channels, int format, int flags)
{
printf("alsa-init: unable to set samplerate-2: %s\n",
snd_strerror(err));
//snd_pcm_hw_params_dump(alsa_hwparams, errlog); jp
return(0);
}
#ifdef SET_PERIOD
{
if ((err = snd_pcm_hw_params_set_period_size(alsa_handler, alsa_hwparams, alsa_fragsize, 0)) < 0)
{
printf("alsa-init: unable to set periodsize: %s\n", snd_strerror(err));
return(0);
}
}
#endif
#ifdef BUFFERTIME
{
int alsa_buffer_time = 500000; /* original 60 */
@ -406,36 +573,33 @@ static int init(int rate_hz, int channels, int format, int flags)
}
#endif
/* get chunk-size */
if ((err = snd_pcm_hw_params_get_period_size(alsa_hwparams, 0)) < 0)
#ifdef SET_CHUNKSIZE
{
//set chunksize
chunk_size = alsa_fragsize / 4;
if ((err = snd_pcm_hw_params_set_period_size(alsa_handler, alsa_hwparams, chunk_size, 0)) < 0)
{
printf("alsa-init: unable to get chunk-size in hw-params: %s\n", snd_strerror(err));
printf("alsa-init: unable to set periodsize: %s\n", snd_strerror(err));
return(0);
} else
{
chunk_size = err;
if (verbose) {printf("alsa-init: got chunksize %i\n", chunk_size);}
}
else if (verbose) {
printf("alsa-init: chunksize set to %i\n", chunk_size);
}
//set period_count
if ((period_val = snd_pcm_hw_params_get_periods_max(alsa_hwparams, 0)) < alsa_fragcount) {
alsa_fragcount = period_val;
}
/* get buffer size */
if ((err = snd_pcm_hw_params_get_buffer_size(alsa_hwparams)) < 0)
{
printf("alsa-init: unable to get buffersize in hw-params: %s\n", snd_strerror(err));
return(0);
} else
{
ao_data.buffersize = err;
if (verbose) {printf("alsa-init: got buffersize %i\n", ao_data.buffersize);}
}
if (MAX_OUTBURST > ao_data.buffersize) { //warning if MAX_OUTBURST is bigger than buffersize
printf("alsa-init: WARNING! MAX_OUTBURST exceeds your available buffersize.\nalsa-init: MAX_OUTBURST=%i, buffersize=%i\n",MAX_OUTBURST,ao_data.buffersize);}
if (verbose)
printf("alsa-init: current val=%i, fragcount=%i\n", period_val, alsa_fragcount);
if (chunk_size == ao_data.buffersize)
{
printf("alsa-init: Can't use period equal to buffer size (%u == %lu)", chunk_size, (long)buffer_size);
return(0);
}
if ((err = snd_pcm_hw_params_set_periods(alsa_handler, alsa_hwparams, alsa_fragcount, 0)) < 0) {
printf("alsa-init: unable to set periods: %s\n", snd_strerror(err));
}
}
#endif
/* finally install hardware parameters */
if ((err = snd_pcm_hw_params(alsa_handler, alsa_hwparams)) < 0)
@ -446,34 +610,22 @@ static int init(int rate_hz, int channels, int format, int flags)
}
// end setting hw-params
#ifdef SW_PARAMS
// gets buffersize for control
if ((err = snd_pcm_hw_params_get_buffer_size(alsa_hwparams)) < 0)
{
printf("alsa-init: unable to get buffersize: %s\n", snd_strerror(err));
return(0);
}
else {
ao_data.buffersize = err;
if (verbose)
printf("alsa-init: got buffersize=%i\n", ao_data.buffersize);
}
// setting sw-params (only avail-min) if noblocking mode was choosed
if (ao_noblock)
{
size_t n;
xfer_align = snd_pcm_sw_params_get_xfer_align(alsa_swparams);
if (xfer_align == 0)
xfer_align = 4;
n = (ao_data.buffersize / xfer_align) * xfer_align;
if (start_delay <= 0) {
start_threshold = n + (double) ao_data.samplerate * start_delay / 1000000;
} else {
start_threshold = (double) ao_data.samplerate * start_delay / 1000000;
}
if (start_threshold < 1)
start_threshold = 1;
if (start_threshold > n)
start_threshold = n;
if (stop_delay <= 0) {
stop_threshold = ao_data.buffersize + (double) ao_data.samplerate * stop_delay / 1000000;
} else {
stop_threshold = (double) ao_data.samplerate * stop_delay / 1000000;
}
if (verbose) {
printf("alsa-init: start_threshold=%lu, stop_threshold=%lu\n",start_threshold,stop_threshold);
printf("alsa-init: n=%i\n", n);
}
if ((err = snd_pcm_sw_params_current(alsa_handler, alsa_swparams)) < 0)
{
@ -482,30 +634,12 @@ static int init(int rate_hz, int channels, int format, int flags)
}
//set min available frames to consider pcm ready (4)
if ((err = snd_pcm_sw_params_set_avail_min(alsa_handler, alsa_swparams, 4)) < 0)
//increased for nonblock-mode should be set dynamically later
if ((err = snd_pcm_sw_params_set_avail_min(alsa_handler, alsa_swparams, chunk_size)) < 0)
{
printf("alsa-init: unable to set avail_min %s\n",snd_strerror(err));
return(0);
}
if ((err = snd_pcm_sw_params_set_start_threshold(alsa_handler, alsa_swparams, start_threshold)) < 0)
{
printf("alsa-init: unable to set start_threshold %s\n",snd_strerror(err));
return(0);
}
if ((err = snd_pcm_sw_params_set_stop_threshold(alsa_handler, alsa_swparams, stop_threshold)) < 0)
{
printf("alsa-init: unable to set stop_threshold %s\n",snd_strerror(err));
return(0);
}
//transfers stream aligned to 4 in nonblocking-mode it would be 1
if ((err = snd_pcm_sw_params_set_xfer_align(alsa_handler, alsa_swparams, 4)) < 0)
{
printf("alsa-init: unable to set xfer_align: %s\n",snd_strerror(err));
return(0);
}
if ((err = snd_pcm_sw_params(alsa_handler, alsa_swparams)) < 0)
{
@ -519,9 +653,8 @@ static int init(int rate_hz, int channels, int format, int flags)
if (verbose) {
printf("alsa-init: bits per sample (bps)=%i, bits per frame (bpf)=%i, chunk_bytes=%i\n",bits_per_sample,bits_per_frame,chunk_bytes);}
}
#endif //end swparams
}//end swparams
if ((err = snd_pcm_prepare(alsa_handler)) < 0)
{
@ -539,48 +672,52 @@ static int init(int rate_hz, int channels, int format, int flags)
/* close audio device */
static void uninit()
{
if (alsa_handler) {
int err;
//if (alsa_device != NULL)
//free(alsa_device);
//snd_pcm_hw_params_free(alsa_hwparams);
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-uninit: pcm drain error: %s\n", snd_strerror(err));
return;
if (!ao_noblock) {
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-uninit: pcm drain error: %s\n", snd_strerror(err));
return;
}
}
if ((err = snd_pcm_close(alsa_handler)) < 0)
{
{
printf("alsa-uninit: pcm close error: %s\n", snd_strerror(err));
return;
}
}
else {
alsa_handler = NULL;
alsa_device = NULL;
printf("alsa-uninit: pcm closed\n");
}
}
else {
printf("alsa-uninit: no handler defined!\n");
}
}
static void audio_pause()
{
int err;
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-pause: pcm drain error: %s\n", snd_strerror(err));
return;
if (!ao_noblock) {
//drain causes error in nonblock-mode!
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-pause: pcm drain error: %s\n", snd_strerror(err));
return;
}
}
else {
if (verbose)
printf("alsa-pause: paused nonblock\n");
#ifdef reset
if ((err = snd_pcm_reset(alsa_handler)) < 0)
{
printf("alsa-pause: pcm reset error: %s\n", snd_strerror(err));
return;
return;
}
#endif
}
static void audio_resume()
@ -599,18 +736,24 @@ static void reset()
{
int err;
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-reset: pcm drain error: %s\n", snd_strerror(err));
return;
}
if (!ao_noblock) {
//drain causes error in nonblock-mode!
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-pause: pcm drain error: %s\n", snd_strerror(err));
return;
}
if ((err = snd_pcm_prepare(alsa_handler)) < 0)
{
printf("alsa-reset: pcm prepare error: %s\n", snd_strerror(err));
return;
if ((err = snd_pcm_prepare(alsa_handler)) < 0)
{
printf("alsa-reset: pcm prepare error: %s\n", snd_strerror(err));
return;
}
} else {
if (verbose)
printf("alsa-reset: reset nonblocked");
return;
}
}
#ifndef timersub
@ -625,61 +768,96 @@ do { \
} while (0)
#endif
/* I/O error handler */
static int xrun(u_char *str_mode)
{
int err;
snd_pcm_status_t *status;
snd_pcm_status_alloca(&status);
if ((err = snd_pcm_status(alsa_handler, status))<0) {
printf("status error: %s", snd_strerror(err));
return(0);
}
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
printf("alsa-%s: xrun of at least %.3f msecs. resetting stream\n",
str_mode,
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
}
if ((err = snd_pcm_prepare(alsa_handler))<0) {
printf("xrun: prepare error: %s", snd_strerror(err));
return(0);
}
return(1); /* ok, data should be accepted again */
}
/*
plays 'len' bytes of 'data'
returns: number of bytes played
modified last at 26.06.02 by jp
modified last at 29.06.02 by jp
thanxs for marius <marius@rospot.com> for giving us the light ;)
*/
static int play(void* data, int len, int flags)
{
snd_pcm_status_t *status;
int num_frames=len/ao_data.bps;
//ao_data.bps is always 4 cause its set to channels * 2 by alsa_format??
int num_frames = len / ao_data.bps;
signed short *output_samples=data;
snd_pcm_sframes_t res = 0;
//printf("alsa-play: frames=%i, len=%i",num_frames,len);
if (!alsa_handler) {
printf("alsa-play: device configuration error");
return 0;
}
do {
if (res == -EPIPE) { /* underrun */
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status(alsa_handler, status))<0) {
printf("alsa-play: buffer underrun. can't determine length");
} else {
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
printf("alsa-play: xrun of at least %.3f msecs. resetting stream",
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
} else
printf("alsa-play: xrun. can't determine length");
}
res = snd_pcm_prepare(alsa_handler);
}
else if (res == -ESTRPIPE) { /* suspend */
printf("alsa-play: pcm in suspend mode. trying to resume");
while ((res = snd_pcm_resume(alsa_handler)) == -EAGAIN)
sleep(1);
if (res < 0)
res = snd_pcm_prepare(alsa_handler);
}
if (res >= 0)
res = snd_pcm_writei(alsa_handler, (void *)output_samples, num_frames);
if (res > 0) {
output_samples += ao_data.channels * res;
num_frames -= res;
}
while (num_frames > 0) {
} while (res == -EPIPE || num_frames > 0);
if (ao_mmap) {
res = snd_pcm_mmap_writei(alsa_handler, (void *)output_samples, num_frames);
} else {
res = snd_pcm_writei(alsa_handler, (void *)output_samples, num_frames);
}
if (res == -EAGAIN) {
snd_pcm_wait(alsa_handler, 1000);
}
else if (res == -EPIPE) { /* underrun */
if (xrun("play") <= 0) {
printf("alsa-play: xrun reset error");
return(0);
}
}
else if (res == -ESTRPIPE) { /* suspend */
printf("alsa-play: pcm in suspend mode. trying to resume\n");
while ((res = snd_pcm_resume(alsa_handler)) == -EAGAIN)
sleep(1);
}
else if (res < 0) {
printf("alsa-play: unknown status, trying to reset soundcard\n");
if ((res = snd_pcm_prepare(alsa_handler)) < 0) {
printf("alsa-play: snd prepare error");
return(0);
break;
}
}
if (res > 0) {
output_samples += ao_data.channels * res;
num_frames -= res;
}
} //end while
if (res < 0) {
printf("alsa-play: write error %s", snd_strerror(res));
@ -688,12 +866,14 @@ static int play(void* data, int len, int flags)
return res < 0 ? (int)res : len;
}
/* how many byes are free in the buffer */
static int get_space()
{
snd_pcm_status_t *status;
int ret;
char *str_status;
//snd_pcm_sframes_t avail_frames = 0;
if ((ret = snd_pcm_status_malloc(&status)) < 0)
{
@ -709,26 +889,50 @@ static int get_space()
switch(snd_pcm_status_get_state(status))
{
case SND_PCM_STATE_OPEN:
case SND_PCM_STATE_PREPARED:
case SND_PCM_STATE_RUNNING:
ret = snd_pcm_status_get_avail(status) * ao_data.bps;
break;
default:
ret = 0;
case SND_PCM_STATE_OPEN:
str_status = "open";
case SND_PCM_STATE_PREPARED:
if (str_status != "open")
str_status = "prepared";
case SND_PCM_STATE_RUNNING:
ret = snd_pcm_status_get_avail(status) * ao_data.bps;
//avail_frames = snd_pcm_avail_update(alsa_handler) * ao_data.bps;
if (str_status != "open" && str_status != "prepared")
str_status = "running";
break;
case SND_PCM_STATE_PAUSED:
if (verbose) printf("alsa-space: paused");
str_status = "paused";
ret = 0;
break;
case SND_PCM_STATE_XRUN:
xrun("space");
str_status = "xrun";
ret = 0;
break;
default:
str_status = "undefined";
ret = 0;
}
if (verbose && str_status != "running")
printf("alsa-space: free space = %i, status=%i, %s --\n", ret, status, str_status);
snd_pcm_status_free(status);
if (ret < 0)
if (ret < 0) {
printf("negative value!!\n");
ret = 0;
//printf("alsa-space: free space = %i",ret);
}
return(ret);
}
/* delay in seconds between first and last sample in buffer */
static float get_delay()
{
if (alsa_handler) {
snd_pcm_status_t *status;
float ret;
@ -760,4 +964,8 @@ static float get_delay()
if (ret < 0)
ret = 0;
return(ret);
} else {
return(0);
}
}

604
libao2/ao_alsa9.c
View File

@ -12,8 +12,8 @@
#include <errno.h>
#include <sys/time.h>
#include <stdlib.h>
//#include <unistd.h>
//#include <string.h>
#include <math.h>
#include <string.h>
#include "../config.h"
@ -48,24 +48,27 @@ static snd_pcm_hw_params_t *alsa_hwparams;
static snd_pcm_sw_params_t *alsa_swparams;
static char *alsa_device;
static int alsa_fragsize = OUTBURST; /* possible 4096, original 8192, OUTBURST is set statically to 512 in config.h but now its not used cause chunksize is allocated dynamically. */
/* possible 4096, original 8192, OUTBURST is set statically to 512 in config.h */
static int alsa_fragsize = 4096; //OUTBURST
static int alsa_fragcount = 8;
static int chunk_size = -1;
static int buffer_size = 0;
static int start_delay = 0;
static int stop_delay = 0;
static size_t bits_per_sample, bits_per_frame;
static size_t chunk_bytes;
int ao_mmap = 0;
int ao_noblock = 0;
static int open_mode;
static int set_block_mode;
#define ALSA_DEVICE_SIZE 48
#define BUFFERTIME /* last undef */
#undef SET_PERIOD /* only function now is to set chunksize staticaly, last defined */
#define SW_PARAMS /* last undef */
#undef BUFFERTIME
#define SET_CHUNKSIZE
snd_pcm_t *
spdif_init(int acard, int adevice)
{
//char *pcm_name = "hw:0,2"; /* first card second device */
@ -149,8 +152,8 @@ spdif_init(int acard, int adevice)
fprintf(stderr, "Broken configuration for this PCM: no configurations available");
return NULL;
}
err = snd_pcm_hw_params_set_access(handler, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
err = snd_pcm_hw_params_set_access(handler, params,SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0) {
fprintf(stderr, "Access tyep not available");
return NULL;
@ -186,7 +189,105 @@ spdif_init(int acard, int adevice)
/* to set/get/query special features/parameters */
static int control(int cmd, int arg)
{
return(CONTROL_UNKNOWN);
switch(cmd) {
case AOCONTROL_QUERY_FORMAT:
return CONTROL_TRUE;
case AOCONTROL_GET_VOLUME:
case AOCONTROL_SET_VOLUME:
{
ao_control_vol_t *vol = (ao_control_vol_t *)arg;
int err;
snd_mixer_t *handle;
snd_mixer_elem_t *elem;
snd_mixer_selem_id_t *sid;
const char *mix_name = "PCM";
char *card = "default";
long pmin, pmax;
long get_vol, set_vol;
float calc_vol, diff, f_multi;
if(ao_data.format == AFMT_AC3)
return CONTROL_TRUE;
//allocate simple id
snd_mixer_selem_id_alloca(&sid);
//sets simple-mixer index and name
snd_mixer_selem_id_set_index(sid, 0);
snd_mixer_selem_id_set_name(sid, mix_name);
if ((err = snd_mixer_open(&handle, 0)) < 0) {
printf("alsa-control: mixer open error: %s\n", snd_strerror(err));
return CONTROL_ERROR;
}
if ((err = snd_mixer_attach(handle, card)) < 0) {
printf("alsa-control: mixer attach %s error: %s", card, snd_strerror(err));
snd_mixer_close(handle);
return CONTROL_ERROR;
}
if ((err = snd_mixer_selem_register(handle, NULL, NULL)) < 0) {
printf("alsa-control: mixer register error: %s", snd_strerror(err));
snd_mixer_close(handle);
return CONTROL_ERROR;
}
err = snd_mixer_load(handle);
if (err < 0) {
printf("alsa-control: mixer load error: %s", snd_strerror(err));
snd_mixer_close(handle);
return CONTROL_ERROR;
}
elem = snd_mixer_find_selem(handle, sid);
if (!elem) {
printf("alsa-control: unable to find simple control '%s',%i\n", snd_mixer_selem_id_get_name(sid), snd_mixer_selem_id_get_index(sid));
snd_mixer_close(handle);
return CONTROL_ERROR;
}
snd_mixer_selem_get_playback_volume_range(elem,&pmin,&pmax);
f_multi = (100 / (float)pmax);
if (cmd == AOCONTROL_SET_VOLUME) {
diff = (vol->left+vol->right) / 2;
set_vol = rint(diff / f_multi);
if (set_vol < 0)
set_vol = 0;
else if (set_vol > pmax)
set_vol = pmax;
//setting channels
if ((err = snd_mixer_selem_set_playback_volume(elem, 0, set_vol)) < 0) {
printf("alsa-control: error setting left channel, %s",snd_strerror(err));
return CONTROL_ERROR;
}
if ((err = snd_mixer_selem_set_playback_volume(elem, 1, set_vol)) < 0) {
printf("alsa-control: error setting right channel, %s",snd_strerror(err));
return CONTROL_ERROR;
}
//printf("diff=%f, set_vol=%i, pmax=%i, mult=%f\n", diff, set_vol, pmax, f_multi);
}
else {
snd_mixer_selem_get_playback_volume(elem, 0, &get_vol);
calc_vol = get_vol;
calc_vol = rintf(calc_vol * f_multi);
vol->left = vol->right = (int)calc_vol;
//printf("get_vol = %i, calc=%i\n",get_vol, calc_vol);
}
snd_mixer_close(handle);
return CONTROL_OK;
}
}
return(CONTROL_UNKNOWN);
}
@ -198,11 +299,10 @@ static int init(int rate_hz, int channels, int format, int flags)
{
int err;
int cards = -1;
int period_val;
snd_pcm_info_t *alsa_info;
char *str_block_mode;
size_t xfer_align; //new
snd_pcm_uframes_t start_threshold, stop_threshold; //new
printf("alsa-init: testing and bugreports are welcome.\n");
printf("alsa-init: requested format: %d Hz, %d channels, %s\n", rate_hz,
channels, audio_out_format_name(format));
@ -223,7 +323,7 @@ static int init(int rate_hz, int channels, int format, int flags)
ao_data.format = format;
ao_data.channels = channels;
ao_data.outburst = OUTBURST;
ao_data.buffersize = 16384;
ao_data.buffersize = MAX_OUTBURST; // was 16384
switch (format)
{
@ -267,11 +367,49 @@ static int init(int rate_hz, int channels, int format, int flags)
audio_out_format_name(format));
return(0);
default:
break;
break;
}
if (ao_subdevice != NULL) // ?? makes no sense
alsa_device = ao_subdevice;
if (ao_subdevice) {
//start parsing ao_subdevice, ugly and not thread safe!
//maybe there's a better way?
int i2 = 1;
int i3 = 0;
char *sub_str;
char *token_str[3];
char* test_str = strdup(ao_subdevice);
//printf("subd=%s, test=%s\n", ao_subdevice,test_str);
if ((strcspn(ao_subdevice, ":")) > 0) {
sub_str = strtok(test_str, ":");
*(token_str) = sub_str;
while (((sub_str = strtok(NULL, ":")) != NULL) && (i2 <= 3)) {
*(token_str+i2) = sub_str;
//printf("token %i: %s\n", i2, *(token_str+i2));
i2 += 1;
}
for (i3=0; i3 <= i2-1; i3++) {
//printf("test %i, %s\n", i3, *(token_str+i3));
if (strcmp(*(token_str + i3), "mmap") == 0) {
ao_mmap = 1;
}
else if (strcmp(*(token_str+i3), "noblock") == 0) {
ao_noblock = 1;
}
else if (strcmp(*(token_str+i3), "hw") == 0) {
alsa_device = *(token_str+i3);
}
else if (!alsa_device || !ao_mmap || !ao_noblock) {
alsa_device = *(token_str+i3);
}
}
}
} //end parsing ao_subdevice
if (alsa_device == NULL)
{
@ -319,14 +457,46 @@ static int init(int rate_hz, int channels, int format, int flags)
// Try to initialize the SPDIF interface
alsa_handler = spdif_init(0, 2);
}
//setting modes for block or nonblock-mode
if (ao_noblock) {
open_mode = SND_PCM_NONBLOCK;
set_block_mode = 1;
str_block_mode = "nonblock-mode";
}
else {
open_mode = 0;
set_block_mode = 0;
str_block_mode = "block-mode";
}
//modes = 0, SND_PCM_NONBLOCK, SND_PCM_ASYNC
if (!alsa_handler) {
if ((err = snd_pcm_open(&alsa_handler,alsa_device,SND_PCM_STREAM_PLAYBACK,0)) < 0)
{
printf("alsa-init: playback open error: %s\n", snd_strerror(err));
return(0);
if ((err = snd_pcm_open(&alsa_handler, alsa_device, SND_PCM_STREAM_PLAYBACK, open_mode)) < 0)
{
if (ao_noblock) {
printf("alsa-init: open in nonblock-mode failed, trying to open in block-mode\n");
if ((err = snd_pcm_open(&alsa_handler, alsa_device, SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
printf("alsa-init: playback open error: %s\n", snd_strerror(err));
return(0);
} else {
set_block_mode = 0;
str_block_mode = "block-mode";
}
}
} else {
printf("alsa-init: playback open error: %s\n", snd_strerror(err));
return(0);
}
}
}
if ((err = snd_pcm_nonblock(alsa_handler, set_block_mode)) < 0) {
printf("alsa-init: error set block-mode %s\n", snd_strerror(err));
}
else if (verbose) {
printf("alsa-init: pcm opend in %s\n", str_block_mode);
}
snd_pcm_hw_params_alloca(&alsa_hwparams);
snd_pcm_sw_params_alloca(&alsa_swparams);
@ -339,12 +509,21 @@ static int init(int rate_hz, int channels, int format, int flags)
return(0);
}
if ((err = snd_pcm_hw_params_set_access(alsa_handler, alsa_hwparams,
SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
{
printf("alsa-init: unable to set access type: %s\n",
snd_strerror(err));
return(0);
if (ao_mmap) {
snd_pcm_access_mask_t *mask = alloca(snd_pcm_access_mask_sizeof());
snd_pcm_access_mask_none(mask);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_INTERLEAVED);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_NONINTERLEAVED);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_COMPLEX);
err = snd_pcm_hw_params_set_access_mask(alsa_handler, alsa_hwparams, mask);
printf("alsa-init: mmap set\n");
} else {
err = snd_pcm_hw_params_set_access(alsa_handler, alsa_hwparams,SND_PCM_ACCESS_RW_INTERLEAVED);
printf("alsa-init: interleave set\n");
}
if (err < 0) {
printf("alsa-init: unable to set access type: %s\n", snd_strerror(err));
return (0);
}
if ((err = snd_pcm_hw_params_set_format(alsa_handler, alsa_hwparams,
@ -367,21 +546,9 @@ static int init(int rate_hz, int channels, int format, int flags)
{
printf("alsa-init: unable to set samplerate-2: %s\n",
snd_strerror(err));
//snd_pcm_hw_params_dump(alsa_hwparams, errlog); jp
return(0);
}
#ifdef SET_PERIOD
{
if ((err = snd_pcm_hw_params_set_period_size(alsa_handler, alsa_hwparams, alsa_fragsize, 0)) < 0)
{
printf("alsa-init: unable to set periodsize: %s\n", snd_strerror(err));
return(0);
}
}
#endif
#ifdef BUFFERTIME
{
int alsa_buffer_time = 500000; /* original 60 */
@ -406,36 +573,33 @@ static int init(int rate_hz, int channels, int format, int flags)
}
#endif
/* get chunk-size */
if ((err = snd_pcm_hw_params_get_period_size(alsa_hwparams, 0)) < 0)
#ifdef SET_CHUNKSIZE
{
//set chunksize
chunk_size = alsa_fragsize / 4;
if ((err = snd_pcm_hw_params_set_period_size(alsa_handler, alsa_hwparams, chunk_size, 0)) < 0)
{
printf("alsa-init: unable to get chunk-size in hw-params: %s\n", snd_strerror(err));
printf("alsa-init: unable to set periodsize: %s\n", snd_strerror(err));
return(0);
} else
{
chunk_size = err;
if (verbose) {printf("alsa-init: got chunksize %i\n", chunk_size);}
}
else if (verbose) {
printf("alsa-init: chunksize set to %i\n", chunk_size);
}
//set period_count
if ((period_val = snd_pcm_hw_params_get_periods_max(alsa_hwparams, 0)) < alsa_fragcount) {
alsa_fragcount = period_val;
}
/* get buffer size */
if ((err = snd_pcm_hw_params_get_buffer_size(alsa_hwparams)) < 0)
{
printf("alsa-init: unable to get buffersize in hw-params: %s\n", snd_strerror(err));
return(0);
} else
{
ao_data.buffersize = err;
if (verbose) {printf("alsa-init: got buffersize %i\n", ao_data.buffersize);}
}
if (MAX_OUTBURST > ao_data.buffersize) { //warning if MAX_OUTBURST is bigger than buffersize
printf("alsa-init: WARNING! MAX_OUTBURST exceeds your available buffersize.\nalsa-init: MAX_OUTBURST=%i, buffersize=%i\n",MAX_OUTBURST,ao_data.buffersize);}
if (verbose)
printf("alsa-init: current val=%i, fragcount=%i\n", period_val, alsa_fragcount);
if (chunk_size == ao_data.buffersize)
{
printf("alsa-init: Can't use period equal to buffer size (%u == %lu)", chunk_size, (long)buffer_size);
return(0);
}
if ((err = snd_pcm_hw_params_set_periods(alsa_handler, alsa_hwparams, alsa_fragcount, 0)) < 0) {
printf("alsa-init: unable to set periods: %s\n", snd_strerror(err));
}
}
#endif
/* finally install hardware parameters */
if ((err = snd_pcm_hw_params(alsa_handler, alsa_hwparams)) < 0)
@ -446,34 +610,22 @@ static int init(int rate_hz, int channels, int format, int flags)
}
// end setting hw-params
#ifdef SW_PARAMS
// gets buffersize for control
if ((err = snd_pcm_hw_params_get_buffer_size(alsa_hwparams)) < 0)
{
printf("alsa-init: unable to get buffersize: %s\n", snd_strerror(err));
return(0);
}
else {
ao_data.buffersize = err;
if (verbose)
printf("alsa-init: got buffersize=%i\n", ao_data.buffersize);
}
// setting sw-params (only avail-min) if noblocking mode was choosed
if (ao_noblock)
{
size_t n;
xfer_align = snd_pcm_sw_params_get_xfer_align(alsa_swparams);
if (xfer_align == 0)
xfer_align = 4;
n = (ao_data.buffersize / xfer_align) * xfer_align;
if (start_delay <= 0) {
start_threshold = n + (double) ao_data.samplerate * start_delay / 1000000;
} else {
start_threshold = (double) ao_data.samplerate * start_delay / 1000000;
}
if (start_threshold < 1)
start_threshold = 1;
if (start_threshold > n)
start_threshold = n;
if (stop_delay <= 0) {
stop_threshold = ao_data.buffersize + (double) ao_data.samplerate * stop_delay / 1000000;
} else {
stop_threshold = (double) ao_data.samplerate * stop_delay / 1000000;
}
if (verbose) {
printf("alsa-init: start_threshold=%lu, stop_threshold=%lu\n",start_threshold,stop_threshold);
printf("alsa-init: n=%i\n", n);
}
if ((err = snd_pcm_sw_params_current(alsa_handler, alsa_swparams)) < 0)
{
@ -482,30 +634,12 @@ static int init(int rate_hz, int channels, int format, int flags)
}
//set min available frames to consider pcm ready (4)
if ((err = snd_pcm_sw_params_set_avail_min(alsa_handler, alsa_swparams, 4)) < 0)
//increased for nonblock-mode should be set dynamically later
if ((err = snd_pcm_sw_params_set_avail_min(alsa_handler, alsa_swparams, chunk_size)) < 0)
{
printf("alsa-init: unable to set avail_min %s\n",snd_strerror(err));
return(0);
}
if ((err = snd_pcm_sw_params_set_start_threshold(alsa_handler, alsa_swparams, start_threshold)) < 0)
{
printf("alsa-init: unable to set start_threshold %s\n",snd_strerror(err));
return(0);
}
if ((err = snd_pcm_sw_params_set_stop_threshold(alsa_handler, alsa_swparams, stop_threshold)) < 0)
{
printf("alsa-init: unable to set stop_threshold %s\n",snd_strerror(err));
return(0);
}
//transfers stream aligned to 4 in nonblocking-mode it would be 1
if ((err = snd_pcm_sw_params_set_xfer_align(alsa_handler, alsa_swparams, 4)) < 0)
{
printf("alsa-init: unable to set xfer_align: %s\n",snd_strerror(err));
return(0);
}
if ((err = snd_pcm_sw_params(alsa_handler, alsa_swparams)) < 0)
{
@ -519,9 +653,8 @@ static int init(int rate_hz, int channels, int format, int flags)
if (verbose) {
printf("alsa-init: bits per sample (bps)=%i, bits per frame (bpf)=%i, chunk_bytes=%i\n",bits_per_sample,bits_per_frame,chunk_bytes);}
}
#endif //end swparams
}//end swparams
if ((err = snd_pcm_prepare(alsa_handler)) < 0)
{
@ -539,48 +672,52 @@ static int init(int rate_hz, int channels, int format, int flags)
/* close audio device */
static void uninit()
{
if (alsa_handler) {
int err;
//if (alsa_device != NULL)
//free(alsa_device);
//snd_pcm_hw_params_free(alsa_hwparams);
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-uninit: pcm drain error: %s\n", snd_strerror(err));
return;
if (!ao_noblock) {
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-uninit: pcm drain error: %s\n", snd_strerror(err));
return;
}
}
if ((err = snd_pcm_close(alsa_handler)) < 0)
{
{
printf("alsa-uninit: pcm close error: %s\n", snd_strerror(err));
return;
}
}
else {
alsa_handler = NULL;
alsa_device = NULL;
printf("alsa-uninit: pcm closed\n");
}
}
else {
printf("alsa-uninit: no handler defined!\n");
}
}
static void audio_pause()
{
int err;
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-pause: pcm drain error: %s\n", snd_strerror(err));
return;
if (!ao_noblock) {
//drain causes error in nonblock-mode!
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-pause: pcm drain error: %s\n", snd_strerror(err));
return;
}
}
else {
if (verbose)
printf("alsa-pause: paused nonblock\n");
#ifdef reset
if ((err = snd_pcm_reset(alsa_handler)) < 0)
{
printf("alsa-pause: pcm reset error: %s\n", snd_strerror(err));
return;
return;
}
#endif
}
static void audio_resume()
@ -599,18 +736,24 @@ static void reset()
{
int err;
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-reset: pcm drain error: %s\n", snd_strerror(err));
return;
}
if (!ao_noblock) {
//drain causes error in nonblock-mode!
if ((err = snd_pcm_drain(alsa_handler)) < 0)
{
printf("alsa-pause: pcm drain error: %s\n", snd_strerror(err));
return;
}
if ((err = snd_pcm_prepare(alsa_handler)) < 0)
{
printf("alsa-reset: pcm prepare error: %s\n", snd_strerror(err));
return;
if ((err = snd_pcm_prepare(alsa_handler)) < 0)
{
printf("alsa-reset: pcm prepare error: %s\n", snd_strerror(err));
return;
}
} else {
if (verbose)
printf("alsa-reset: reset nonblocked");
return;
}
}
#ifndef timersub
@ -625,61 +768,96 @@ do { \
} while (0)
#endif
/* I/O error handler */
static int xrun(u_char *str_mode)
{
int err;
snd_pcm_status_t *status;
snd_pcm_status_alloca(&status);
if ((err = snd_pcm_status(alsa_handler, status))<0) {
printf("status error: %s", snd_strerror(err));
return(0);
}
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
printf("alsa-%s: xrun of at least %.3f msecs. resetting stream\n",
str_mode,
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
}
if ((err = snd_pcm_prepare(alsa_handler))<0) {
printf("xrun: prepare error: %s", snd_strerror(err));
return(0);
}
return(1); /* ok, data should be accepted again */
}
/*
plays 'len' bytes of 'data'
returns: number of bytes played
modified last at 26.06.02 by jp
modified last at 29.06.02 by jp
thanxs for marius <marius@rospot.com> for giving us the light ;)
*/
static int play(void* data, int len, int flags)
{
snd_pcm_status_t *status;
int num_frames=len/ao_data.bps;
//ao_data.bps is always 4 cause its set to channels * 2 by alsa_format??
int num_frames = len / ao_data.bps;
signed short *output_samples=data;
snd_pcm_sframes_t res = 0;
//printf("alsa-play: frames=%i, len=%i",num_frames,len);
if (!alsa_handler) {
printf("alsa-play: device configuration error");
return 0;
}
do {
if (res == -EPIPE) { /* underrun */
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status(alsa_handler, status))<0) {
printf("alsa-play: buffer underrun. can't determine length");
} else {
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
printf("alsa-play: xrun of at least %.3f msecs. resetting stream",
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
} else
printf("alsa-play: xrun. can't determine length");
}
res = snd_pcm_prepare(alsa_handler);
}
else if (res == -ESTRPIPE) { /* suspend */
printf("alsa-play: pcm in suspend mode. trying to resume");
while ((res = snd_pcm_resume(alsa_handler)) == -EAGAIN)
sleep(1);
if (res < 0)
res = snd_pcm_prepare(alsa_handler);
}
if (res >= 0)
res = snd_pcm_writei(alsa_handler, (void *)output_samples, num_frames);
if (res > 0) {
output_samples += ao_data.channels * res;
num_frames -= res;
}
while (num_frames > 0) {
} while (res == -EPIPE || num_frames > 0);
if (ao_mmap) {
res = snd_pcm_mmap_writei(alsa_handler, (void *)output_samples, num_frames);
} else {
res = snd_pcm_writei(alsa_handler, (void *)output_samples, num_frames);
}
if (res == -EAGAIN) {
snd_pcm_wait(alsa_handler, 1000);
}
else if (res == -EPIPE) { /* underrun */
if (xrun("play") <= 0) {
printf("alsa-play: xrun reset error");
return(0);
}
}
else if (res == -ESTRPIPE) { /* suspend */
printf("alsa-play: pcm in suspend mode. trying to resume\n");
while ((res = snd_pcm_resume(alsa_handler)) == -EAGAIN)
sleep(1);
}
else if (res < 0) {
printf("alsa-play: unknown status, trying to reset soundcard\n");
if ((res = snd_pcm_prepare(alsa_handler)) < 0) {
printf("alsa-play: snd prepare error");
return(0);
break;
}
}
if (res > 0) {
output_samples += ao_data.channels * res;
num_frames -= res;
}
} //end while
if (res < 0) {
printf("alsa-play: write error %s", snd_strerror(res));
@ -688,12 +866,14 @@ static int play(void* data, int len, int flags)
return res < 0 ? (int)res : len;
}
/* how many byes are free in the buffer */
static int get_space()
{
snd_pcm_status_t *status;
int ret;
char *str_status;
//snd_pcm_sframes_t avail_frames = 0;
if ((ret = snd_pcm_status_malloc(&status)) < 0)
{
@ -709,26 +889,50 @@ static int get_space()
switch(snd_pcm_status_get_state(status))
{
case SND_PCM_STATE_OPEN:
case SND_PCM_STATE_PREPARED:
case SND_PCM_STATE_RUNNING:
ret = snd_pcm_status_get_avail(status) * ao_data.bps;
break;
default:
ret = 0;
case SND_PCM_STATE_OPEN:
str_status = "open";
case SND_PCM_STATE_PREPARED:
if (str_status != "open")
str_status = "prepared";
case SND_PCM_STATE_RUNNING:
ret = snd_pcm_status_get_avail(status) * ao_data.bps;
//avail_frames = snd_pcm_avail_update(alsa_handler) * ao_data.bps;
if (str_status != "open" && str_status != "prepared")
str_status = "running";
break;
case SND_PCM_STATE_PAUSED:
if (verbose) printf("alsa-space: paused");
str_status = "paused";
ret = 0;
break;
case SND_PCM_STATE_XRUN:
xrun("space");
str_status = "xrun";
ret = 0;
break;
default:
str_status = "undefined";
ret = 0;
}
if (verbose && str_status != "running")
printf("alsa-space: free space = %i, status=%i, %s --\n", ret, status, str_status);
snd_pcm_status_free(status);
if (ret < 0)
if (ret < 0) {
printf("negative value!!\n");
ret = 0;
//printf("alsa-space: free space = %i",ret);
}
return(ret);
}
/* delay in seconds between first and last sample in buffer */
static float get_delay()
{
if (alsa_handler) {
snd_pcm_status_t *status;
float ret;
@ -760,4 +964,8 @@ static float get_delay()
if (ret < 0)
ret = 0;
return(ret);
} else {
return(0);
}
}