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tdeaccessibility/kttsd/players/alsaplayer/alsaplayer.cpp

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/***************************************************** vim:set ts=4 sw=4 sts=4:
ALSA player.
-------------------
Copyright:
(C) 2005 by Gary Cramblitt <garycramblitt@comcast.net>
Portions based on aplay.c in alsa-utils
Copyright (c) by Jaroslav Kysela <perex@suse.cz>
Based on vplay program by Michael Beck
-------------------
Original author: Gary Cramblitt <garycramblitt@comcast.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
******************************************************************************/
// #include <sys/wait.h>
// System includes.
#include <config.h>
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
// TQt includes.
#include <tqdir.h>
#include <tqapplication.h>
#include <tqcstring.h>
// KDE includes.
#include <kdebug.h>
#include <tdeconfig.h>
#include <kstandarddirs.h>
#include <tdemessagebox.h>
#include <tdelocale.h>
// AlsaPlayer includes.
#include "alsaplayer.h"
#if !defined(__GNUC__) || __GNUC__ >= 3
#define ERR(...) do {\
TQString dbgStr;\
TQString s = dbgStr.sprintf( "%s:%d: ERROR ", __FUNCTION__, __LINE__); \
s += dbgStr.sprintf( __VA_ARGS__); \
kdDebug() << timestamp() << "AlsaPlayer::" << s << endl; \
} while (0)
#else
#define ERR(args...) do {\
TQString dbgStr;\
TQString s = dbgStr.sprintf( "%s:%d: ERROR ", __FUNCTION__, __LINE__); \
s += dbgStr.sprintf( ##args ); \
kdDebug() << timestamp() << "AlsaPlayer::" << s << endl; \
} while (0)
#endif
#if !defined(__GNUC__) || __GNUC__ >= 3
#define MSG(...) do {\
if (m_debugLevel >= 1) {\
TQString dbgStr; \
TQString s = dbgStr.sprintf( "%s:%d: ", __FUNCTION__, __LINE__); \
s += dbgStr.sprintf( __VA_ARGS__); \
kdDebug() << timestamp() << "AlsaPlayer::" << s << endl; \
}; \
} while (0)
#else
#define MSG(args...) do {\
if (m_debugLevel >= 1) {\
TQString dbgStr; \
TQString s = dbgStr.sprintf( "%s:%d: ", __FUNCTION__, __LINE__); \
s += dbgStr.sprintf( ##args ); \
kdDebug() << timestamp() << "AlsaPlayer::" << s << endl; \
}; \
} while (0)
#endif
#if !defined(__GNUC__) || __GNUC__ >= 3
#define DBG(...) do {\
if (m_debugLevel >= 2) {\
TQString dbgStr; \
TQString s = dbgStr.sprintf( "%s:%d: ", __FUNCTION__, __LINE__); \
s += dbgStr.sprintf( __VA_ARGS__); \
kdDebug() << timestamp() << "AlsaPlayer::" << s << endl; \
}; \
} while (0)
#else
#define DBG(args...) do {\
if (m_debugLevel >= 2) {\
TQString dbgStr; \
TQString s = dbgStr.sprintf( "%s:%d: ", __FUNCTION__, __LINE__); \
s += dbgStr.sprintf( ##args ); \
kdDebug() << timestamp() << "AlsaPlayer::" << s << endl; \
}; \
} while (0)
#endif
TQString AlsaPlayer::timestamp() const
{
time_t t;
struct timeval tv;
char *tstr;
t = time(NULL);
tstr = strdup(ctime(&t));
tstr[strlen(tstr)-1] = 0;
gettimeofday(&tv,NULL);
TQString ts;
ts.sprintf(" %s [%d] ",tstr, (int) tv.tv_usec);
free(tstr);
return ts;
}
////////////////////////////////////////////////////////////////////////////////
// public methods
////////////////////////////////////////////////////////////////////////////////
AlsaPlayer::AlsaPlayer(TQObject* parent, const char* name, const TQStringList& args) :
Player(parent, name, args),
m_currentVolume(1.0),
m_pcmName("default"),
m_defPeriodSize(128),
m_defPeriods(8),
m_debugLevel(1),
m_simulatedPause(false)
{
init();
}
AlsaPlayer::~AlsaPlayer()
{
if (running()) {
stop();
wait();
}
}
//void AlsaPlayer::play(const FileHandle &file)
void AlsaPlayer::startPlay(const TQString &file)
{
if (running()) {
if (paused()) {
if (canPause)
snd_pcm_pause(handle, false);
else
m_simulatedPause = false;
}
return;
}
audiofile.setName(file);
audiofile.open(IO_ReadOnly);
fd = audiofile.handle();
// Start thread running.
start();
}
/*virtual*/ void AlsaPlayer::run()
{
TQString pName = m_pcmName.section(" ", 0, 0);
DBG("pName = %s", pName.ascii());
pcm_name = tqstrdup(pName.ascii());
int err;
snd_pcm_info_t *info;
m_simulatedPause = false;
snd_pcm_info_alloca(&info);
err = snd_output_stdio_attach(&log, stderr, 0);
assert(err >= 0);
rhwdata.format = DEFAULT_FORMAT;
rhwdata.rate = DEFAULT_SPEED;
rhwdata.channels = 1;
err = snd_pcm_open(&handle, pcm_name, stream, open_mode);
if (err < 0) {
ERR("audio open error on pcm device %s: %s", pcm_name, snd_strerror(err));
return;
}
if ((err = snd_pcm_info(handle, info)) < 0) {
ERR("info error: %s", snd_strerror(err));
return;
}
chunk_size = 1024;
hwdata = rhwdata;
audioBuffer.resize(1024);
// audiobuf = (char *)malloc(1024);
audiobuf = audioBuffer.data();
if (audiobuf == NULL) {
ERR("not enough memory");
return;
}
if (mmap_flag) {
writei_func = snd_pcm_mmap_writei;
readi_func = snd_pcm_mmap_readi;
writen_func = snd_pcm_mmap_writen;
readn_func = snd_pcm_mmap_readn;
} else {
writei_func = snd_pcm_writei;
readi_func = snd_pcm_readi;
writen_func = snd_pcm_writen;
readn_func = snd_pcm_readn;
}
playback(fd);
cleanup();
return;
}
void AlsaPlayer::pause()
{
if (running()) {
DBG("Pause requested");
m_mutex.lock();
if (handle) {
// Some hardware can pause; some can't. canPause is set in set_params.
if (canPause) {
m_simulatedPause = false;
snd_pcm_pause(handle, true);
m_mutex.unlock();
} else {
// Set a flag and cause wait_for_poll to sleep. When resumed, will get
// an underrun.
m_simulatedPause = true;
m_mutex.unlock();
}
}
}
}
void AlsaPlayer::stop()
{
if (running()) {
DBG("STOP! Locking mutex");
m_mutex.lock();
m_simulatedPause = false;
if (handle) {
/* This constant is arbitrary */
char buf = 42;
DBG("Request for stop, device state is %s",
snd_pcm_state_name(snd_pcm_state(handle)));
write(alsa_stop_pipe[1], &buf, 1);
}
DBG("unlocking mutex");
m_mutex.unlock();
/* Wait for thread to exit */
DBG("waiting for thread to exit");
wait();
DBG("cleaning up");
}
cleanup();
}
/*
* Stop playback, cleanup and exit thread.
*/
void AlsaPlayer::stopAndExit()
{
// if (handle) snd_pcm_drop(handle);
cleanup();
exit();
}
void AlsaPlayer::setVolume(float volume)
{
m_currentVolume = volume;
}
float AlsaPlayer::volume() const
{
return m_currentVolume;
}
/////////////////////////////////////////////////////////////////////////////////
// player status functions
/////////////////////////////////////////////////////////////////////////////////
bool AlsaPlayer::playing() const
{
bool result = false;
if (running()) {
m_mutex.lock();
if (handle) {
if (canPause) {
snd_pcm_status_t *status;
snd_pcm_status_alloca(&status);
int res;
if ((res = snd_pcm_status(handle, status)) < 0)
ERR("status error: %s", snd_strerror(res));
else {
result = (SND_PCM_STATE_RUNNING == snd_pcm_status_get_state(status))
|| (SND_PCM_STATE_DRAINING == snd_pcm_status_get_state(status));
DBG("state = %s", snd_pcm_state_name(snd_pcm_status_get_state(status)));
}
} else
result = !m_simulatedPause;
}
m_mutex.unlock();
}
return result;
}
bool AlsaPlayer::paused() const
{
bool result = false;
if (running()) {
m_mutex.lock();
if (handle) {
if (canPause) {
snd_pcm_status_t *status;
snd_pcm_status_alloca(&status);
int res;
if ((res = snd_pcm_status(handle, status)) < 0)
ERR("status error: %s", snd_strerror(res));
else {
result = (SND_PCM_STATE_PAUSED == snd_pcm_status_get_state(status));
DBG("state = %s", snd_pcm_state_name(snd_pcm_status_get_state(status)));
}
} else
result = m_simulatedPause;
}
m_mutex.unlock();
}
return result;
}
int AlsaPlayer::totalTime() const
{
int total = 0;
int rate = hwdata.rate;
int channels = hwdata.channels;
if (rate > 0 && channels > 0) {
total = int((double(pbrec_count) / rate) / channels);
// DBG("pbrec_count = %i rate =%i channels = %i", pbrec_count, rate, channels);
// DBG("totalTime = %i", total);
}
return total;
}
int AlsaPlayer::currentTime() const
{
int current = 0;
int rate = hwdata.rate;
int channels = hwdata.channels;
if (rate > 0 && channels > 0) {
current = int((double(fdcount) / rate) / channels);
// DBG("fdcount = %i rate = %i channels = %i", fdcount, rate, channels);
// DBG("currentTime = %i", current);
}
return current;
}
int AlsaPlayer::position() const
{
// TODO: Make this more accurate by adding frames that have been so-far
// played within the Alsa ring buffer.
return pbrec_count > 0 ? int(double(fdcount) * 1000 / pbrec_count + .5) : 0;
}
/////////////////////////////////////////////////////////////////////////////////
// player seek functions
/////////////////////////////////////////////////////////////////////////////////
void AlsaPlayer::seek(int /*seekTime*/)
{
// TODO:
}
void AlsaPlayer::seekPosition(int /*position*/)
{
// TODO:
}
/*
* Returns a list of PCM devices.
* This function fills the specified list with ALSA hardware soundcards found on the system.
* It uses plughw:xx instead of hw:xx for specifiers, because hw:xx are not practical to
* use (e.g. they require a resampler/channel mixer in the application).
*/
TQStringList AlsaPlayer::getPluginList( const TQCString& /*classname*/ )
{
int err = 0;
int card = -1, device = -1;
snd_ctl_t *handle;
snd_ctl_card_info_t *info;
snd_pcm_info_t *pcminfo;
snd_ctl_card_info_alloca(&info);
snd_pcm_info_alloca(&pcminfo);
TQStringList result;
result.append("default");
for (;;) {
err = snd_card_next(&card);
if (err < 0 || card < 0) break;
if (card >= 0) {
char name[32];
sprintf(name, "hw:%i", card);
if ((err = snd_ctl_open(&handle, name, 0)) < 0) continue;
if ((err = snd_ctl_card_info(handle, info)) < 0) {
snd_ctl_close(handle);
continue;
}
for (int devCnt=0;;++devCnt) {
err = snd_ctl_pcm_next_device(handle, &device);
if (err < 0 || device < 0) break;
snd_pcm_info_set_device(pcminfo, device);
snd_pcm_info_set_subdevice(pcminfo, 0);
snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_PLAYBACK);
if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) continue;
TQString infoName = " ";
infoName += snd_ctl_card_info_get_name(info);
infoName += " (";
infoName += snd_pcm_info_get_name(pcminfo);
infoName += ")";
if (0 == devCnt) {
TQString pcmName = TQString("default:%1").arg(card);
result.append(pcmName + infoName);
}
TQString pcmName = TQString("plughw:%1,%2").arg(card).arg(device);
result.append(pcmName + infoName);
}
snd_ctl_close(handle);
}
}
return result;
}
// TQStringList AlsaPlayer::getPluginList( const TQCString& /*classname*/ )
// {
// TQStringList assumed("default");
// snd_config_t *conf;
// int err = snd_config_update();
// if (err < 0) {
// ERR("snd_config_update: %s", snd_strerror(err));
// return assumed;
// }
// err = snd_config_search(snd_config, "pcm", &conf);
// if (err < 0) return TQStringList();
// snd_config_iterator_t it = snd_config_iterator_first(conf);
// snd_config_iterator_t itEnd = snd_config_iterator_end(conf);
// const char* id;
// snd_config_t *entry;
// TQStringList result;
// snd_ctl_card_info_t *info;
// snd_ctl_card_info_alloca(&info);
// snd_pcm_info_t *pcminfo;
// snd_pcm_info_alloca(&pcminfo);
// while (it != itEnd) {
// entry = snd_config_iterator_entry(it);
// err = snd_config_get_id(entry, &id);
// if (err >= 0) {
// if (TQString(id) != "default")
// {
// int card = -1;
// while (snd_card_next(&card) >= 0 && card >= 0) {
// char name[32];
// sprintf(name, "%s:%d", id, card);
// DBG("Checking %s", name);
// snd_ctl_t *handle;
// if ((err = snd_ctl_open(&handle, name, SND_CTL_NONBLOCK)) >= 0) {
// if ((err = snd_ctl_card_info(handle, info)) >= 0) {
// int dev = -1;
// snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK;
// while (snd_ctl_pcm_next_device(handle, &dev) >= 0 && dev >= 0) {
// snd_pcm_info_set_device(pcminfo, dev);
// snd_pcm_info_set_subdevice(pcminfo, 0);
// snd_pcm_info_set_stream(pcminfo, stream);
// if ((err = snd_ctl_pcm_info(handle, pcminfo)) >= 0) {
// TQString pluginName = name;
// pluginName += ",";
// pluginName += TQString::number(dev);
// pluginName += " ";
// pluginName += snd_ctl_card_info_get_name(info);
// pluginName += ",";
// pluginName += snd_pcm_info_get_name(pcminfo);
// result.append(pluginName);
// // DBG(pluginName);
// }
// }
// }
// snd_ctl_close(handle);
// }
// }
// if (card == -1) result.append(id);
// } else result.append(id);
// }
// it = snd_config_iterator_next(it);
// }
// snd_config_update_free_global();
// return result;
// }
void AlsaPlayer::setSinkName(const TQString& sinkName) { m_pcmName = sinkName; }
/////////////////////////////////////////////////////////////////////////////////
// private
/////////////////////////////////////////////////////////////////////////////////
void AlsaPlayer::init()
{
pcm_name = 0;
handle = 0;
canPause = false;
timelimit = 0;
file_type = FORMAT_DEFAULT;
sleep_min = 0;
// open_mode = 0;
open_mode = SND_PCM_NONBLOCK;
stream = SND_PCM_STREAM_PLAYBACK;
mmap_flag = 0;
interleaved = 1;
audiobuf = NULL;
chunk_size = 0;
period_time = 0;
buffer_time = 0;
avail_min = -1;
start_delay = 0;
stop_delay = 0;
buffer_pos = 0;
log = 0;
fd = -1;
pbrec_count = LLONG_MAX;
alsa_stop_pipe[0] = 0;
alsa_stop_pipe[1] = 0;
alsa_poll_fds = 0;
m_simulatedPause = false;
}
void AlsaPlayer::cleanup()
{
DBG("cleaning up");
m_mutex.lock();
if (pcm_name) free(pcm_name);
if (fd >= 0) audiofile.close();
if (handle) {
snd_pcm_drop(handle);
snd_pcm_close(handle);
}
if (alsa_stop_pipe[0]) close(alsa_stop_pipe[0]);
if (alsa_stop_pipe[1]) close(alsa_stop_pipe[1]);
if (audiobuf) audioBuffer.resize(0);
if (alsa_poll_fds) alsa_poll_fds_barray.resize(0);
if (log) snd_output_close(log);
snd_config_update_free_global();
init();
m_mutex.unlock();
}
/*
* Safe read (for pipes)
*/
ssize_t AlsaPlayer::safe_read(int fd, void *buf, size_t count)
{
ssize_t result = 0;
ssize_t res;
while (count > 0) {
if ((res = read(fd, buf, count)) == 0)
break;
if (res < 0)
return result > 0 ? result : res;
count -= res;
result += res;
buf = (char *)buf + res;
}
return result;
}
/*
* Test, if it is a .VOC file and return >=0 if ok (this is the length of rest)
* < 0 if not
*/
int AlsaPlayer::test_vocfile(void *buffer)
{
VocHeader *vp = (VocHeader*)buffer;
if (!memcmp(vp->magic, VOC_MAGIC_STRING, 20)) {
vocminor = LE_SHORT(vp->version) & 0xFF;
vocmajor = LE_SHORT(vp->version) / 256;
if (LE_SHORT(vp->version) != (0x1233 - LE_SHORT(vp->coded_ver)))
return -2; /* coded version mismatch */
return LE_SHORT(vp->headerlen) - sizeof(VocHeader); /* 0 mostly */
}
return -1; /* magic string fail */
}
/*
* helper for test_wavefile
*/
size_t AlsaPlayer::test_wavefile_read(int fd, char *buffer, size_t *size, size_t reqsize, int line)
{
if (*size >= reqsize)
return *size;
if ((size_t)safe_read(fd, buffer + *size, reqsize - *size) != reqsize - *size) {
ERR("read error (called from line %i)", line);
stopAndExit();
}
return *size = reqsize;
}
#define check_wavefile_space(buffer, len, blimit) \
if (len > blimit) { \
blimit = len; \
if ((buffer = (char*)realloc(buffer, blimit)) == NULL) { \
ERR("not enough memory"); \
stopAndExit(); \
} \
}
/*
* test, if it's a .WAV file, > 0 if ok (and set the speed, stereo etc.)
* == 0 if not
* Value returned is bytes to be discarded.
*/
ssize_t AlsaPlayer::test_wavefile(int fd, char *_buffer, size_t size)
{
WaveHeader *h = (WaveHeader *)_buffer;
char *buffer = NULL;
size_t blimit = 0;
WaveFmtBody *f;
WaveChunkHeader *c;
u_int type;
u_int len;
if (size < sizeof(WaveHeader))
return -1;
if (h->magic != WAV_RIFF || h->type != WAV_WAVE)
return -1;
if (size > sizeof(WaveHeader)) {
check_wavefile_space(buffer, size - sizeof(WaveHeader), blimit);
memcpy(buffer, _buffer + sizeof(WaveHeader), size - sizeof(WaveHeader));
}
size -= sizeof(WaveHeader);
while (1) {
check_wavefile_space(buffer, sizeof(WaveChunkHeader), blimit);
test_wavefile_read(fd, buffer, &size, sizeof(WaveChunkHeader), __LINE__);
c = (WaveChunkHeader*)buffer;
type = c->type;
len = LE_INT(c->length);
len += len % 2;
if (size > sizeof(WaveChunkHeader))
memmove(buffer, buffer + sizeof(WaveChunkHeader), size - sizeof(WaveChunkHeader));
size -= sizeof(WaveChunkHeader);
if (type == WAV_FMT)
break;
check_wavefile_space(buffer, len, blimit);
test_wavefile_read(fd, buffer, &size, len, __LINE__);
if (size > len)
memmove(buffer, buffer + len, size - len);
size -= len;
}
if (len < sizeof(WaveFmtBody)) {
ERR("unknown length of 'fmt ' chunk (read %u, should be %u at least)", len, (u_int)sizeof(WaveFmtBody));
stopAndExit();
}
check_wavefile_space(buffer, len, blimit);
test_wavefile_read(fd, buffer, &size, len, __LINE__);
f = (WaveFmtBody*) buffer;
if (LE_SHORT(f->format) != WAV_PCM_CODE) {
ERR("can't play not PCM-coded WAVE-files");
stopAndExit();
}
if (LE_SHORT(f->modus) < 1) {
ERR("can't play WAVE-files with %d tracks", LE_SHORT(f->modus));
stopAndExit();
}
hwdata.channels = LE_SHORT(f->modus);
switch (LE_SHORT(f->bit_p_spl)) {
case 8:
if (hwdata.format != DEFAULT_FORMAT &&
hwdata.format != SND_PCM_FORMAT_U8)
MSG("Warning: format is changed to U8");
hwdata.format = SND_PCM_FORMAT_U8;
break;
case 16:
if (hwdata.format != DEFAULT_FORMAT &&
hwdata.format != SND_PCM_FORMAT_S16_LE)
MSG("Warning: format is changed to S16_LE");
hwdata.format = SND_PCM_FORMAT_S16_LE;
break;
case 24:
switch (LE_SHORT(f->byte_p_spl) / hwdata.channels) {
case 3:
if (hwdata.format != DEFAULT_FORMAT &&
hwdata.format != SND_PCM_FORMAT_S24_3LE)
MSG("Warning: format is changed to S24_3LE");
hwdata.format = SND_PCM_FORMAT_S24_3LE;
break;
case 4:
if (hwdata.format != DEFAULT_FORMAT &&
hwdata.format != SND_PCM_FORMAT_S24_LE)
MSG("Warning: format is changed to S24_LE");
hwdata.format = SND_PCM_FORMAT_S24_LE;
break;
default:
ERR("can't play WAVE-files with sample %d bits in %d bytes wide (%d channels)", LE_SHORT(f->bit_p_spl), LE_SHORT(f->byte_p_spl), hwdata.channels);
stopAndExit();
}
break;
case 32:
hwdata.format = SND_PCM_FORMAT_S32_LE;
break;
default:
ERR("can't play WAVE-files with sample %d bits wide", LE_SHORT(f->bit_p_spl));
stopAndExit();
}
hwdata.rate = LE_INT(f->sample_fq);
if (size > len)
memmove(buffer, buffer + len, size - len);
size -= len;
while (1) {
u_int type, len;
check_wavefile_space(buffer, sizeof(WaveChunkHeader), blimit);
test_wavefile_read(fd, buffer, &size, sizeof(WaveChunkHeader), __LINE__);
c = (WaveChunkHeader*)buffer;
type = c->type;
len = LE_INT(c->length);
if (size > sizeof(WaveChunkHeader))
memmove(buffer, buffer + sizeof(WaveChunkHeader), size - sizeof(WaveChunkHeader));
size -= sizeof(WaveChunkHeader);
if (type == WAV_DATA) {
if (len < pbrec_count && len < 0x7ffffffe)
pbrec_count = len;
if (size > 0)
memcpy(_buffer, buffer, size);
free(buffer);
return size;
}
len += len % 2;
check_wavefile_space(buffer, len, blimit);
test_wavefile_read(fd, buffer, &size, len, __LINE__);
if (size > len)
memmove(buffer, buffer + len, size - len);
size -= len;
}
/* shouldn't be reached */
return -1;
}
/*
* Test for AU file.
*/
int AlsaPlayer::test_au(int fd, char *buffer)
{
AuHeader *ap = (AuHeader*)buffer;
if (ap->magic != AU_MAGIC)
return -1;
if (BE_INT(ap->hdr_size) > 128 || BE_INT(ap->hdr_size) < 24)
return -1;
pbrec_count = BE_INT(ap->data_size);
switch (BE_INT(ap->encoding)) {
case AU_FMT_ULAW:
if (hwdata.format != DEFAULT_FORMAT &&
hwdata.format != SND_PCM_FORMAT_MU_LAW)
MSG("Warning: format is changed to MU_LAW");
hwdata.format = SND_PCM_FORMAT_MU_LAW;
break;
case AU_FMT_LIN8:
if (hwdata.format != DEFAULT_FORMAT &&
hwdata.format != SND_PCM_FORMAT_U8)
MSG("Warning: format is changed to U8");
hwdata.format = SND_PCM_FORMAT_U8;
break;
case AU_FMT_LIN16:
if (hwdata.format != DEFAULT_FORMAT &&
hwdata.format != SND_PCM_FORMAT_S16_BE)
MSG("Warning: format is changed to S16_BE");
hwdata.format = SND_PCM_FORMAT_S16_BE;
break;
default:
return -1;
}
hwdata.rate = BE_INT(ap->sample_rate);
if (hwdata.rate < 2000 || hwdata.rate > 256000)
return -1;
hwdata.channels = BE_INT(ap->channels);
if (hwdata.channels < 1 || hwdata.channels > 128)
return -1;
if ((size_t)safe_read(fd, buffer + sizeof(AuHeader), BE_INT(ap->hdr_size) - sizeof(AuHeader)) != BE_INT(ap->hdr_size) - sizeof(AuHeader)) {
ERR("read error");
stopAndExit();
}
return 0;
}
void AlsaPlayer::set_params(void)
{
snd_pcm_hw_params_t *hwparams;
snd_pcm_uframes_t period_size;
int err;
int dir;
unsigned int rate;
unsigned int periods;
snd_pcm_hw_params_alloca(&hwparams);
err = snd_pcm_hw_params_any(handle, hwparams);
if (err < 0) {
ERR("Broken configuration for this PCM: no configurations available");
stopAndExit();
}
/* Create the pipe for communication about stop requests. */
if (pipe(alsa_stop_pipe)) {
ERR("Stop pipe creation failed (%s)", strerror(errno));
stopAndExit();
}
/* Find how many descriptors we will get for poll(). */
alsa_fd_count = snd_pcm_poll_descriptors_count(handle);
if (alsa_fd_count <= 0){
ERR("Invalid poll descriptors count returned from ALSA.");
stopAndExit();
}
/* Create and fill in struct pollfd *alsa_poll_fds with ALSA descriptors. */
// alsa_poll_fds = (pollfd *)malloc ((alsa_fd_count + 1) * sizeof(struct pollfd));
alsa_poll_fds_barray.resize((alsa_fd_count + 1) * sizeof(struct pollfd));
alsa_poll_fds = (pollfd *)alsa_poll_fds_barray.data();
assert(alsa_poll_fds);
if ((err = snd_pcm_poll_descriptors(handle, alsa_poll_fds, alsa_fd_count)) < 0) {
ERR("Unable to obtain poll descriptors for playback: %s", snd_strerror(err));
stopAndExit();
}
/* Create a new pollfd structure for requests by alsa_stop(). */
struct pollfd alsa_stop_pipe_pfd;
alsa_stop_pipe_pfd.fd = alsa_stop_pipe[0];
alsa_stop_pipe_pfd.events = POLLIN;
alsa_stop_pipe_pfd.revents = 0;
/* Join this our own pollfd to the ALSAs ones. */
alsa_poll_fds[alsa_fd_count] = alsa_stop_pipe_pfd;
++alsa_fd_count;
if (mmap_flag) {
snd_pcm_access_mask_t *mask = (snd_pcm_access_mask_t *)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(handle, hwparams, mask);
} else if (interleaved)
err = snd_pcm_hw_params_set_access(handle, hwparams,
SND_PCM_ACCESS_RW_INTERLEAVED);
else
err = snd_pcm_hw_params_set_access(handle, hwparams,
SND_PCM_ACCESS_RW_NONINTERLEAVED);
if (err < 0) {
ERR("Error setting access type: %s", snd_strerror(err));
stopAndExit();
}
err = snd_pcm_hw_params_set_format(handle, hwparams, hwdata.format);
if (err < 0) {
ERR("Error setting sample format to %i: %s", hwdata.format, snd_strerror(err));
stopAndExit();
}
err = snd_pcm_hw_params_set_channels(handle, hwparams, hwdata.channels);
if (err < 0) {
ERR("Error setting channel count to %i: %s", hwdata.channels, snd_strerror(err));
stopAndExit();
}
#if 0
err = snd_pcm_hw_params_set_periods_min(handle, hwparams, 2);
assert(err >= 0);
#endif
rate = hwdata.rate;
#if SND_LIB_MAJOR >= 1
err = snd_pcm_hw_params_set_rate_near(handle, hwparams, &hwdata.rate, 0);
#else
err = snd_pcm_hw_params_set_rate_near(handle, hwparams, hwdata.rate, 0);
#endif
assert(err >= 0);
if ((float)rate * 1.05 < hwdata.rate || (float)rate * 0.95 > hwdata.rate) {
MSG("Warning: rate is not accurate (requested = %iHz, got = %iHz)", rate, hwdata.rate);
MSG(" please, try the plug plugin (-Dplug:%s)", snd_pcm_name(handle));
}
period_size = m_defPeriodSize;
dir = 1;
#if SND_LIB_MAJOR >= 1
err = snd_pcm_hw_params_set_period_size_near(handle, hwparams, &period_size, &dir);
#else
err = snd_pcm_hw_params_set_period_size_near(handle, hwparams, period_size, &dir);
#endif
if (err < 0) {
MSG("Setting period_size to %lu failed, but continuing: %s", period_size, snd_strerror(err));
}
periods = m_defPeriods;
dir = 1;
#if SND_LIB_MAJOR >= 1
err = snd_pcm_hw_params_set_periods_near(handle, hwparams, &periods, &dir);
#else
err = snd_pcm_hw_params_set_periods_near(handle, hwparams, periods, &dir);
#endif
if (err < 0)
MSG("Unable to set number of periods to %i, but continuing: %s", periods, snd_strerror(err));
/* Install hw parameters. */
err = snd_pcm_hw_params(handle, hwparams);
if (err < 0) {
MSG("Unable to install hw params: %s", snd_strerror(err));
snd_pcm_hw_params_dump(hwparams, log);
stopAndExit();
}
/* Determine if device can pause. */
canPause = (1 == snd_pcm_hw_params_can_pause(hwparams));
/* Get final buffer size and calculate the chunk size we will pass to device. */
#if SND_LIB_MAJOR >= 1
snd_pcm_hw_params_get_buffer_size(hwparams, &buffer_size);
#else
buffer_size = snd_pcm_hw_params_get_buffer_size(hwparams);
#endif
chunk_size = periods * period_size;
if (0 == chunk_size) {
ERR("Invalid periods or period_size. Cannot continue.");
stopAndExit();
}
if (chunk_size == buffer_size)
MSG("WARNING: Shouldn't use chunk_size equal to buffer_size (%lu). Continuing anyway.", chunk_size);
DBG("Final buffer_size = %lu, chunk_size = %lu, periods = %i, period_size = %lu, canPause = %i",
buffer_size, chunk_size, periods, period_size, canPause);
if (m_debugLevel >= 2)
snd_pcm_dump(handle, log);
bits_per_sample = snd_pcm_format_physical_width(hwdata.format);
bits_per_frame = bits_per_sample * hwdata.channels;
chunk_bytes = chunk_size * bits_per_frame / 8;
audioBuffer.resize(chunk_bytes);
audiobuf = audioBuffer.data();
if (audiobuf == NULL) {
ERR("not enough memory");
stopAndExit();
}
}
#ifndef timersub
#define timersub(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
if ((result)->tv_usec < 0) { \
--(result)->tv_sec; \
(result)->tv_usec += 1000000; \
} \
} while (0)
#endif
/* I/O error handler */
void AlsaPlayer::xrun()
{
snd_pcm_status_t *status;
int res;
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status(handle, status))<0) {
ERR("status error: %s", snd_strerror(res));
stopAndExit();
}
if (SND_PCM_STATE_XRUN == snd_pcm_status_get_state(status)) {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
MSG("%s!!! (at least %.3f ms long)",
stream == SND_PCM_STREAM_PLAYBACK ? "underrun" : "overrun",
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
if (m_debugLevel >= 2) {
DBG("Status:");
snd_pcm_status_dump(status, log);
}
if ((res = snd_pcm_prepare(handle))<0) {
ERR("xrun: prepare error: %s", snd_strerror(res));
stopAndExit();
}
return; /* ok, data should be accepted again */
} if (SND_PCM_STATE_DRAINING == snd_pcm_status_get_state(status)) {
if (m_debugLevel >= 2) {
DBG("Status(DRAINING):");
snd_pcm_status_dump(status, log);
}
if (stream == SND_PCM_STREAM_CAPTURE) {
MSG("capture stream format change? attempting recover...");
if ((res = snd_pcm_prepare(handle))<0) {
ERR("xrun(DRAINING): prepare error: %s", snd_strerror(res));
stopAndExit();
}
return;
}
}
if (m_debugLevel >= 2) {
DBG("Status(R/W):");
snd_pcm_status_dump(status, log);
}
ERR("read/write error, state = %s", snd_pcm_state_name(snd_pcm_status_get_state(status)));
stopAndExit();
}
/* I/O suspend handler */
void AlsaPlayer::suspend(void)
{
int res;
MSG("Suspended. Trying resume. ");
while ((res = snd_pcm_resume(handle)) == -EAGAIN)
sleep(1); /* wait until suspend flag is released */
if (res < 0) {
MSG("Failed. Restarting stream. ");
if ((res = snd_pcm_prepare(handle)) < 0) {
ERR("suspend: prepare error: %s", snd_strerror(res));
stopAndExit();
}
}
MSG("Suspend done.");
}
/* peak handler */
void AlsaPlayer::compute_max_peak(char *data, size_t count)
{
signed int val, max, max_peak = 0, perc;
size_t ocount = count;
switch (bits_per_sample) {
case 8: {
signed char *valp = (signed char *)data;
signed char mask = snd_pcm_format_silence(hwdata.format);
while (count-- > 0) {
val = *valp++ ^ mask;
val = abs(val);
if (max_peak < val)
max_peak = val;
}
break;
}
case 16: {
signed short *valp = (signed short *)data;
signed short mask = snd_pcm_format_silence_16(hwdata.format);
count /= 2;
while (count-- > 0) {
val = *valp++ ^ mask;
val = abs(val);
if (max_peak < val)
max_peak = val;
}
break;
}
case 32: {
signed int *valp = (signed int *)data;
signed int mask = snd_pcm_format_silence_32(hwdata.format);
count /= 4;
while (count-- > 0) {
val = *valp++ ^ mask;
val = abs(val);
if (max_peak < val)
max_peak = val;
}
break;
}
default:
break;
}
max = 1 << (bits_per_sample-1);
if (max <= 0)
max = 0x7fffffff;
DBG("Max peak (%li samples): %05i (0x%04x) ", (long)ocount, max_peak, max_peak);
if (bits_per_sample > 16)
perc = max_peak / (max / 100);
else
perc = max_peak * 100 / max;
for (val = 0; val < 20; val++)
if (val <= perc / 5)
kdDebug() << '#';
else
kdDebug() << ' ';
DBG(" %i%%", perc);
}
/*
* Write to the ALSA pcm.
*/
ssize_t AlsaPlayer::pcm_write(char *data, size_t count)
{
ssize_t r;
ssize_t result = 0;
if (sleep_min == 0 && count < chunk_size) {
DBG("calling snd_pcm_format_set_silence");
snd_pcm_format_set_silence(hwdata.format, data + count * bits_per_frame / 8, (chunk_size - count) * hwdata.channels);
count = chunk_size;
}
while (count > 0) {
DBG("calling writei_func, count = %i", count);
r = writei_func(handle, data, count);
DBG("writei_func returned %i", r);
if (-EAGAIN == r || (r >= 0 && (size_t)r < count)) {
DBG("r = %i calling snd_pcm_wait", r);
snd_pcm_wait(handle, 100);
} else if (-EPIPE == r) {
xrun();
} else if (-ESTRPIPE == r) {
suspend();
} else if (-EBUSY == r){
MSG("WARNING: sleeping while PCM BUSY");
usleep(1000);
continue;
} else if (r < 0) {
ERR("write error: %s", snd_strerror(r));
stopAndExit();
}
if (r > 0) {
if (m_debugLevel >= 1)
compute_max_peak(data, r * hwdata.channels);
result += r;
count -= r;
data += r * bits_per_frame / 8;
}
/* Report current state */
DBG("PCM state before polling: %s",
snd_pcm_state_name(snd_pcm_state(handle)));
int err = wait_for_poll(0);
if (err < 0) {
ERR("Wait for poll() failed");
return -1;
}
else if (err == 1){
MSG("Playback stopped");
/* Drop the playback on the sound device (probably
still in progress up till now) */
err = snd_pcm_drop(handle);
if (err < 0) {
ERR("snd_pcm_drop() failed: %s", snd_strerror(err));
return -1;
}
return -1;
}
}
return result;
}
/*
* ok, let's play a .voc file
*/
ssize_t AlsaPlayer::voc_pcm_write(u_char *data, size_t count)
{
ssize_t result = count, r;
size_t size;
while (count > 0) {
size = count;
if (size > chunk_bytes - buffer_pos)
size = chunk_bytes - buffer_pos;
memcpy(audiobuf + buffer_pos, data, size);
data += size;
count -= size;
buffer_pos += size;
if ((size_t)buffer_pos == chunk_bytes) {
if ((size_t)(r = pcm_write(audiobuf, chunk_size)) != chunk_size)
return r;
buffer_pos = 0;
}
}
return result;
}
void AlsaPlayer::voc_write_silence(unsigned x)
{
unsigned l;
char *buf;
TQByteArray buffer(chunk_bytes);
// buf = (char *) malloc(chunk_bytes);
buf = buffer.data();
if (buf == NULL) {
ERR("can't allocate buffer for silence");
return; /* not fatal error */
}
snd_pcm_format_set_silence(hwdata.format, buf, chunk_size * hwdata.channels);
while (x > 0) {
l = x;
if (l > chunk_size)
l = chunk_size;
if (voc_pcm_write((u_char*)buf, l) != (ssize_t)l) {
ERR("write error");
stopAndExit();
}
x -= l;
}
// free(buf);
}
void AlsaPlayer::voc_pcm_flush(void)
{
if (buffer_pos > 0) {
size_t b;
if (sleep_min == 0) {
if (snd_pcm_format_set_silence(hwdata.format, audiobuf + buffer_pos, chunk_bytes - buffer_pos * 8 / bits_per_sample) < 0)
MSG("voc_pcm_flush - silence error");
b = chunk_size;
} else {
b = buffer_pos * 8 / bits_per_frame;
}
if (pcm_write(audiobuf, b) != (ssize_t)b)
ERR("voc_pcm_flush error");
}
snd_pcm_drain(handle);
}
void AlsaPlayer::voc_play(int fd, int ofs, const char* name)
{
int l;
VocBlockType *bp;
VocVoiceData *vd;
VocExtBlock *eb;
size_t nextblock, in_buffer;
u_char *data, *buf;
char was_extended = 0, output = 0;
u_short *sp, repeat = 0;
size_t silence;
off_t filepos = 0;
#define COUNT(x) nextblock -= x; in_buffer -= x; data += x
#define COUNT1(x) in_buffer -= x; data += x
TQByteArray buffer(64 * 1024);
// data = buf = (u_char *)malloc(64 * 1024);
data = buf = (u_char*)buffer.data();
buffer_pos = 0;
if (data == NULL) {
ERR("malloc error");
stopAndExit();
}
MSG("Playing Creative Labs Channel file '%s'...", name);
/* first we waste the rest of header, ugly but we don't need seek */
while (ofs > (ssize_t)chunk_bytes) {
if ((size_t)safe_read(fd, buf, chunk_bytes) != chunk_bytes) {
ERR("read error");
stopAndExit();
}
ofs -= chunk_bytes;
}
if (ofs) {
if (safe_read(fd, buf, ofs) != ofs) {
ERR("read error");
stopAndExit();
}
}
hwdata.format = DEFAULT_FORMAT;
hwdata.channels = 1;
hwdata.rate = DEFAULT_SPEED;
set_params();
in_buffer = nextblock = 0;
while (1) {
Fill_the_buffer: /* need this for repeat */
if (in_buffer < 32) {
/* move the rest of buffer to pos 0 and fill the buf up */
if (in_buffer)
memcpy(buf, data, in_buffer);
data = buf;
if ((l = safe_read(fd, buf + in_buffer, chunk_bytes - in_buffer)) > 0)
in_buffer += l;
else if (!in_buffer) {
/* the file is truncated, so simulate 'Terminator'
and reduce the datablock for safe landing */
nextblock = buf[0] = 0;
if (l == -1) {
// perror(name);
stopAndExit();
}
}
}
while (!nextblock) { /* this is a new block */
if (in_buffer < sizeof(VocBlockType))
goto __end;
bp = (VocBlockType *) data;
COUNT1(sizeof(VocBlockType));
nextblock = VOC_DATALEN(bp);
if (output)
MSG(" "); /* write /n after ASCII-out */
output = 0;
switch (bp->type) {
case 0:
#if 0
MSG("Terminator");
#endif
return; /* VOC-file stop */
case 1:
vd = (VocVoiceData *) data;
COUNT1(sizeof(VocVoiceData));
/* we need a SYNC, before we can set new SPEED, STEREO ... */
if (!was_extended) {
hwdata.rate = (int) (vd->tc);
hwdata.rate = 1000000 / (256 - hwdata.rate);
#if 0
MSG("Channel data %d Hz", dsp_speed);
#endif
if (vd->pack) { /* /dev/dsp can't it */
ERR("can't play packed .voc files");
return;
}
if (hwdata.channels == 2) /* if we are in Stereo-Mode, switch back */
hwdata.channels = 1;
} else { /* there was extended block */
hwdata.channels = 2;
was_extended = 0;
}
set_params();
break;
case 2: /* nothing to do, pure data */
#if 0
MSG("Channel continuation");
#endif
break;
case 3: /* a silence block, no data, only a count */
sp = (u_short *) data;
COUNT1(sizeof(u_short));
hwdata.rate = (int) (*data);
COUNT1(1);
hwdata.rate = 1000000 / (256 - hwdata.rate);
set_params();
silence = (((size_t) * sp) * 1000) / hwdata.rate;
#if 0
MSG("Silence for %d ms", (int) silence);
#endif
voc_write_silence(*sp);
break;
case 4: /* a marker for syncronisation, no effect */
sp = (u_short *) data;
COUNT1(sizeof(u_short));
#if 0
MSG("Marker %d", *sp);
#endif
break;
case 5: /* ASCII text, we copy to stderr */
output = 1;
#if 0
MSG("ASCII - text :");
#endif
break;
case 6: /* repeat marker, says repeatcount */
/* my specs don't say it: maybe this can be recursive, but
I don't think somebody use it */
repeat = *(u_short *) data;
COUNT1(sizeof(u_short));
#if 0
MSG("Repeat loop %d times", repeat);
#endif
if (filepos >= 0) { /* if < 0, one seek fails, why test another */
if ((filepos = lseek(fd, 0, 1)) < 0) {
ERR("can't play loops; %s isn't seekable", name);
repeat = 0;
} else {
filepos -= in_buffer; /* set filepos after repeat */
}
} else {
repeat = 0;
}
break;
case 7: /* ok, lets repeat that be rewinding tape */
if (repeat) {
if (repeat != 0xFFFF) {
#if 0
MSG("Repeat loop %d", repeat);
#endif
--repeat;
}
#if 0
else
MSG("Neverending loop");
#endif
lseek(fd, filepos, 0);
in_buffer = 0; /* clear the buffer */
goto Fill_the_buffer;
}
#if 0
else
MSG("End repeat loop");
#endif
break;
case 8: /* the extension to play Stereo, I have SB 1.0 :-( */
was_extended = 1;
eb = (VocExtBlock *) data;
COUNT1(sizeof(VocExtBlock));
hwdata.rate = (int) (eb->tc);
hwdata.rate = 256000000L / (65536 - hwdata.rate);
hwdata.channels = eb->mode == VOC_MODE_STEREO ? 2 : 1;
if (hwdata.channels == 2)
hwdata.rate = hwdata.rate >> 1;
if (eb->pack) { /* /dev/dsp can't it */
ERR("can't play packed .voc files");
return;
}
#if 0
MSG("Extended block %s %d Hz",
(eb->mode ? "Stereo" : "Mono"), dsp_speed);
#endif
break;
default:
ERR("unknown blocktype %d. terminate.", bp->type);
return;
} /* switch (bp->type) */
} /* while (! nextblock) */
/* put nextblock data bytes to dsp */
l = in_buffer;
if (nextblock < (size_t)l)
l = nextblock;
if (l) {
if (output) {
if (write(2, data, l) != l) { /* to stderr */
ERR("write error");
stopAndExit();
}
} else {
if (voc_pcm_write(data, l) != l) {
ERR("write error");
stopAndExit();
}
}
COUNT(l);
}
} /* while(1) */
__end:
voc_pcm_flush();
// free(buf);
}
/* that was a big one, perhaps somebody split it :-) */
/* setting the globals for playing raw data */
void AlsaPlayer::init_raw_data(void)
{
hwdata = rhwdata;
}
/* calculate the data count to read from/to dsp */
off_t AlsaPlayer::calc_count(void)
{
off_t count;
if (timelimit == 0) {
count = pbrec_count;
} else {
count = snd_pcm_format_size(hwdata.format, hwdata.rate * hwdata.channels);
count *= (off_t)timelimit;
}
return count < pbrec_count ? count : pbrec_count;
}
void AlsaPlayer::header(int /*rtype*/, const char* /*name*/)
{
// fprintf(stderr, "%s %s '%s' : ",
// (stream == SND_PCM_STREAM_PLAYBACK) ? "Playing" : "Recording",
// fmt_rec_table[rtype].what,
// name);
TQString channels;
if (hwdata.channels == 1)
channels = "Mono";
else if (hwdata.channels == 2)
channels = "Stereo";
else
channels = TQString("Channels %1").arg(hwdata.channels);
DBG("Format: %s, Rate %d Hz, %s",
snd_pcm_format_description(hwdata.format),
hwdata.rate,
channels.ascii());
}
/* playing raw data */
void AlsaPlayer::playback_go(int fd, size_t loaded, off_t count, int rtype, const char *name)
{
int l, r;
off_t written = 0;
off_t c;
if (m_debugLevel >= 1) header(rtype, name);
set_params();
while (loaded > chunk_bytes && written < count) {
if (pcm_write(audiobuf + written, chunk_size) <= 0)
return;
written += chunk_bytes;
loaded -= chunk_bytes;
}
if (written > 0 && loaded > 0)
memmove(audiobuf, audiobuf + written, loaded);
l = loaded;
while (written < count) {
do {
c = count - written;
if (c > chunk_bytes)
c = chunk_bytes;
c -= l;
if (c == 0)
break;
r = safe_read(fd, audiobuf + l, c);
if (r < 0) {
// perror(name);
stopAndExit();
}
fdcount += r;
if (r == 0)
break;
l += r;
} while (sleep_min == 0 && (size_t)l < chunk_bytes);
l = l * 8 / bits_per_frame;
DBG("calling pcm_write with %i frames.", l);
r = pcm_write(audiobuf, l);
DBG("pcm_write returned r = %i", r);
if (r < 0) return;
if (r != l)
break;
r = r * bits_per_frame / 8;
written += r;
l = 0;
}
DBG("Draining...");
/* We want the next "device ready" notification only when the buffer is completely empty. */
/* Do this by setting the avail_min to the buffer size. */
int err;
DBG("Getting swparams");
snd_pcm_sw_params_t *swparams;
snd_pcm_sw_params_alloca(&swparams);
err = snd_pcm_sw_params_current(handle, swparams);
if (err < 0) {
ERR("Unable to get current swparams: %s", snd_strerror(err));
return;
}
DBG("Setting avail min to %lu", buffer_size);
err = snd_pcm_sw_params_set_avail_min(handle, swparams, buffer_size);
if (err < 0) {
ERR("Unable to set avail min for playback: %s", snd_strerror(err));
return;
}
/* write the parameters to the playback device */
DBG("Writing swparams");
err = snd_pcm_sw_params(handle, swparams);
if (err < 0) {
ERR("Unable to set sw params for playback: %s", snd_strerror(err));
return;
}
DBG("Waiting for poll");
err = wait_for_poll(1);
if (err < 0) {
ERR("Wait for poll() failed");
return;
} else if (err == 1){
MSG("Playback stopped while draining");
/* Drop the playback on the sound device (probably
still in progress up till now) */
err = snd_pcm_drop(handle);
if (err < 0) {
ERR("snd_pcm_drop() failed: %s", snd_strerror(err));
return;
}
}
DBG("Draining completed");
}
/*
* let's play or capture it (capture_type says VOC/WAVE/raw)
*/
void AlsaPlayer::playback(int fd)
{
int ofs;
size_t dta;
ssize_t dtawave;
pbrec_count = LLONG_MAX;
fdcount = 0;
/* read the file header */
dta = sizeof(AuHeader);
if ((size_t)safe_read(fd, audiobuf, dta) != dta) {
ERR("read error");
stopAndExit();
}
if (test_au(fd, audiobuf) >= 0) {
rhwdata.format = hwdata.format;
pbrec_count = calc_count();
playback_go(fd, 0, pbrec_count, FORMAT_AU, name.ascii());
goto __end;
}
dta = sizeof(VocHeader);
if ((size_t)safe_read(fd, audiobuf + sizeof(AuHeader),
dta - sizeof(AuHeader)) != dta - sizeof(AuHeader)) {
ERR("read error");
stopAndExit();
}
if ((ofs = test_vocfile(audiobuf)) >= 0) {
pbrec_count = calc_count();
voc_play(fd, ofs, name.ascii());
goto __end;
}
/* read bytes for WAVE-header */
if ((dtawave = test_wavefile(fd, audiobuf, dta)) >= 0) {
pbrec_count = calc_count();
playback_go(fd, dtawave, pbrec_count, FORMAT_WAVE, name.ascii());
} else {
/* should be raw data */
init_raw_data();
pbrec_count = calc_count();
playback_go(fd, dta, pbrec_count, FORMAT_RAW, name.ascii());
}
__end:
return;
}
/* Wait until ALSA is ready for more samples or stop() was called.
@return 0 if ALSA is ready for more input, +1 if a request to stop
the sound output was received and a negative value on error. */
int AlsaPlayer::wait_for_poll(int draining)
{
unsigned short revents;
snd_pcm_state_t state;
int ret;
DBG("Waiting for poll");
/* Wait for certain events */
while (1) {
/* Simulated pause by not writing to alsa device, which will lead to an XRUN
when resumed. */
if (m_simulatedPause)
msleep(500);
else {
ret = poll(alsa_poll_fds, alsa_fd_count, -1);
DBG("activity on %d descriptors", ret);
/* Check for stop request from alsa_stop on the last file descriptors. */
if ((revents = alsa_poll_fds[alsa_fd_count-1].revents)) {
if (revents & POLLIN){
DBG("stop requested");
return 1;
}
}
/* Check the first count-1 descriptors for ALSA events */
snd_pcm_poll_descriptors_revents(handle, alsa_poll_fds, alsa_fd_count-1, &revents);
/* Ensure we are in the right state */
state = snd_pcm_state(handle);
DBG("State after poll returned is %s", snd_pcm_state_name(state));
if (SND_PCM_STATE_XRUN == state){
if (!draining){
MSG("WARNING: Buffer underrun detected!");
xrun();
return 0;
}else{
DBG("Playback terminated");
return 0;
}
}
if (SND_PCM_STATE_SUSPENDED == state){
DBG("WARNING: Suspend detected!");
suspend();
return 0;
}
/* Check for errors */
if (revents & POLLERR) {
DBG("poll revents says POLLERR");
return -EIO;
}
/* Is ALSA ready for more input? */
if ((revents & POLLOUT)){
DBG("Ready for more input");
return 0;
}
}
}
}
#include "alsaplayer.moc"
#undef DBG
#undef MSG
#undef ERR
// vim: sw=4 ts=8 et
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