--- /dev/null
+/*
+ * Copyright (C) 2011 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+/** \file ao_write.c Paraslash's libao output plugin. */
+
+#include <pthread.h>
+#include <ao/ao.h>
+#include <regex.h>
+#include <stdbool.h>
+
+#include "para.h"
+#include "fd.h"
+#include "string.h"
+#include "list.h"
+#include "sched.h"
+#include "ggo.h"
+#include "buffer_tree.h"
+#include "write.h"
+#include "write_common.h"
+#include "ao_write.cmdline.h"
+#include "error.h"
+
+struct private_aow_data {
+ ao_device *dev;
+ int bytes_per_frame;
+
+ pthread_t thread;
+ pthread_attr_t attr;
+ pthread_mutex_t mutex;
+ pthread_cond_t data_available;
+ struct btr_node *thread_btrn;
+};
+
+static void aow_close(struct writer_node *wn)
+{
+ struct private_aow_data *pawd = wn->private_data;
+
+ if (!pawd)
+ return;
+ ao_close(pawd->dev);
+ free(pawd);
+ wn->private_data = NULL;
+ ao_shutdown();
+}
+
+static void aow_pre_select(struct sched *s, struct task *t)
+{
+ struct writer_node *wn = container_of(t, struct writer_node, task);
+ int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
+
+ if (ret == 0)
+ return;
+ sched_min_delay(s);
+}
+
+static int aow_set_sample_format(unsigned sample_rate, unsigned channels,
+ int sample_format, ao_sample_format *result)
+{
+ memset(result, 0, sizeof(*result));
+ switch (sample_format) {
+ case SF_U8:
+ case SF_U16_LE:
+ case SF_U16_BE:
+ return -E_AO_BAD_SAMPLE_FORMAT;
+ case SF_S8:
+ /* no need to set byte_format */
+ result->bits = 8;
+ break;
+ case SF_S16_LE:
+ result->bits = 16;
+ result->byte_format = AO_FMT_LITTLE;
+ break;
+ case SF_S16_BE:
+ result->bits = 16;
+ result->byte_format = AO_FMT_BIG;
+ break;
+ default:
+ PARA_EMERG_LOG("bug: invalid sample format\n");
+ exit(EXIT_FAILURE);
+ }
+ result->channels = channels;
+ result->rate = sample_rate;
+ return 1;
+}
+
+static int aow_open_device(int id, ao_sample_format *asf, ao_option *options,
+ ao_device **result)
+{
+ const char *msg;
+ ao_device *dev = ao_open_live(id, asf, options);
+
+ if (dev) {
+ *result = dev;
+ return 1;
+ }
+ switch (errno) {
+ case AO_ENODRIVER:
+ msg = "No driver corresponds to driver_id";
+ break;
+ case AO_ENOTLIVE:
+ msg = "This driver is not a live output device";
+ break;
+ case AO_EBADOPTION:
+ msg = "A valid option key has an invalid value";
+ break;
+ case AO_EOPENDEVICE:
+ msg = "Cannot open the device";
+ break;
+ case AO_EFAIL:
+ msg = "General libao error";
+ break;
+ default:
+ msg = "Unknown ao error";
+ break;
+ }
+ PARA_ERROR_LOG("%s\n", msg);
+ return -E_AO_OPEN_LIVE;
+}
+
+static int aow_init(struct writer_node *wn, unsigned sample_rate,
+ unsigned channels, int sample_format)
+{
+ int id, ret, i;
+ ao_option *aoo = NULL;
+ ao_sample_format asf;
+ ao_info *info;
+ struct private_aow_data *pawd = para_malloc(sizeof(*pawd));
+ struct ao_write_args_info *conf = wn->conf;
+
+ ao_initialize();
+ if (conf->driver_given) {
+ ret = -E_AO_BAD_DRIVER;
+ id = ao_driver_id(conf->driver_arg);
+ } else {
+ ret = -E_AO_DEFAULT_DRIVER;
+ id = ao_default_driver_id();
+ }
+ if (id < 0)
+ goto fail;
+ info = ao_driver_info(id);
+ assert(info && info->short_name);
+ if (info->type == AO_TYPE_FILE) {
+ ret = -E_AO_FILE_NOT_SUPP;
+ goto fail;
+ }
+ PARA_INFO_LOG("using %s driver\n", info->short_name);
+ for (i = 0; i < conf->ao_option_given; i++) {
+ char *o = para_strdup(conf->ao_option_arg[i]), *value;
+
+ ret = -E_AO_BAD_OPTION;
+ value = strchr(o, ':');
+ if (!value) {
+ free(o);
+ goto fail;
+ }
+ *value = '\0';
+ value++;
+ PARA_INFO_LOG("appending option: key=%s, value=%s\n", o, value);
+ ret = ao_append_option(&aoo, o, value);
+ free(o);
+ if (ret == 0) {
+ ret = -E_AO_APPEND_OPTION;
+ goto fail;
+ }
+ }
+ ret = aow_set_sample_format(sample_rate, channels, sample_format, &asf);
+ if (ret < 0)
+ goto fail;
+ if (sample_format == SF_S8 || sample_format == SF_U8)
+ pawd->bytes_per_frame = channels;
+ else
+ pawd->bytes_per_frame = channels * 2;
+ ret = aow_open_device(id, &asf, aoo, &pawd->dev);
+ if (ret < 0)
+ goto fail;
+ PARA_INFO_LOG("successfully opened %s\n", info->short_name);
+ wn->private_data = pawd;
+ return 1;
+fail:
+ free(pawd);
+ return ret;
+}
+
+__noreturn static void *aow_play(void *priv)
+{
+ struct writer_node *wn = priv;
+ struct private_aow_data *pawd = wn->private_data;
+ struct btr_node *btrn = pawd->thread_btrn;
+ size_t frames, bytes;
+ char *data;
+ int ret;
+
+ for (;;) {
+ /*
+ * Lock mutex and wait for signal. pthread_cond_wait() will
+ * automatically and atomically unlock mutex while it waits.
+ */
+ pthread_mutex_lock(&pawd->mutex);
+ for (;;) {
+ ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
+ if (ret < 0)
+ goto unlock;
+ if (ret > 0) {
+ btr_merge(btrn, wn->min_iqs);
+ bytes = btr_next_buffer(btrn, &data);
+ frames = bytes / pawd->bytes_per_frame;
+ if (frames > 0)
+ break;
+ /* eof and less than a single frame available */
+ ret = -E_AO_EOF;
+ goto unlock;
+ }
+ //PARA_CRIT_LOG("waiting for data\n");
+ //usleep(1000);
+ //pthread_mutex_unlock(&pawd->mutex);
+ pthread_cond_wait(&pawd->data_available, &pawd->mutex);
+ }
+ pthread_mutex_unlock(&pawd->mutex);
+ assert(frames > 0);
+ bytes = frames * pawd->bytes_per_frame;
+ ret = -E_AO_PLAY;
+ if (ao_play(pawd->dev, data, bytes) == 0) /* failure */
+ goto out;
+ btr_consume(btrn, bytes);
+ }
+unlock:
+ pthread_mutex_unlock(&pawd->mutex);
+out:
+ assert(ret < 0);
+ PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
+ pthread_exit(NULL);
+}
+
+static int aow_create_thread(struct writer_node *wn)
+{
+ struct private_aow_data *pawd = wn->private_data;
+ int ret;
+ const char *msg;
+
+ /* initialize with default attributes */
+ msg = "could not init mutex";
+ ret = pthread_mutex_init(&pawd->mutex, NULL);
+ if (ret < 0)
+ goto fail;
+
+ msg = "could not initialize condition variable";
+ ret = pthread_cond_init(&pawd->data_available, NULL);
+ if (ret < 0)
+ goto fail;
+
+ msg = "could not initialize thread attributes";
+ ret = pthread_attr_init(&pawd->attr);
+ if (ret < 0)
+ goto fail;
+
+ /* schedule this thread under the real-time policy SCHED_FIFO */
+ msg = "could not set sched policy";
+ ret = pthread_attr_setschedpolicy(&pawd->attr, SCHED_FIFO);
+ if (ret < 0)
+ goto fail;
+
+ msg = "could not set detach state to joinable";
+ ret = pthread_attr_setdetachstate(&pawd->attr, PTHREAD_CREATE_JOINABLE);
+ if (ret < 0)
+ goto fail;
+
+ msg = "could not create thread";
+ ret = pthread_create(&pawd->thread, &pawd->attr, aow_play, wn);
+ if (ret < 0)
+ goto fail;
+ return 1;
+fail:
+ PARA_ERROR_LOG("%s (%s)\n", msg, strerror(ret));
+ return -E_AO_PTHREAD;
+}
+
+static void aow_post_select(__a_unused struct sched *s,
+ struct task *t)
+{
+ struct writer_node *wn = container_of(t, struct writer_node, task);
+ struct btr_node *btrn = wn->btrn;
+ struct private_aow_data *pawd = wn->private_data;
+ int ret;
+
+ if (!pawd) {
+ int32_t rate, ch, format;
+ struct btr_node_description bnd;
+
+ ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
+ if (ret < 0)
+ goto remove_btrn;
+ if (ret == 0)
+ return;
+ get_btr_sample_rate(btrn, &rate);
+ get_btr_channels(btrn, &ch);
+ get_btr_sample_format(btrn, &format);
+ ret = aow_init(wn, rate, ch, format);
+ if (ret < 0)
+ goto remove_btrn;
+ pawd = wn->private_data;
+
+ /* set up thread btr node */
+ bnd.name = "ao_thread_btrn";
+ bnd.parent = btrn;
+ bnd.child = NULL;
+ bnd.handler = NULL;
+ bnd.context = pawd;
+ pawd->thread_btrn = btr_new_node(&bnd);
+ wn->private_data = pawd;
+
+ ret = aow_create_thread(wn);
+ if (ret < 0)
+ goto remove_thread_btrn;
+ return;
+ }
+ pthread_mutex_lock(&pawd->mutex);
+ ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
+ if (ret > 0) {
+ btr_pushdown(btrn);
+ pthread_cond_signal(&pawd->data_available);
+ }
+ pthread_mutex_unlock(&pawd->mutex);
+ if (ret >= 0)
+ goto out;
+ pthread_mutex_lock(&pawd->mutex);
+ btr_remove_node(btrn);
+ btrn = NULL;
+ PARA_INFO_LOG("waiting for thread to terminate\n");
+ pthread_cond_signal(&pawd->data_available);
+ pthread_mutex_unlock(&pawd->mutex);
+ pthread_join(pawd->thread, NULL);
+remove_thread_btrn:
+ btr_remove_node(pawd->thread_btrn);
+ btr_free_node(pawd->thread_btrn);
+remove_btrn:
+ if (btrn)
+ btr_remove_node(btrn);
+out:
+ t->error = ret;
+}
+
+__malloc static void *aow_parse_config_or_die(const char *options)
+{
+ struct ao_write_args_info *conf = para_calloc(sizeof(*conf));
+
+ /* exits on errors */
+ ao_cmdline_parser_string(options, conf, "ao_write");
+ return conf;
+}
+
+static void aow_free_config(void *conf)
+{
+ ao_cmdline_parser_free(conf);
+}
+
+/**
+ * The init function of the ao writer.
+ *
+ * \param w Pointer to the writer to initialize.
+ *
+ * \sa struct writer.
+ */
+void ao_write_init(struct writer *w)
+{
+ struct ao_write_args_info dummy;
+ int i, j, num_drivers, num_lines;
+ ao_info **driver_list;
+ char **dh; /* detailed help */
+
+ ao_cmdline_parser_init(&dummy);
+ w->close = aow_close;
+ w->pre_select = aow_pre_select;
+ w->post_select = aow_post_select;
+ w->parse_config_or_die = aow_parse_config_or_die;
+ w->free_config = aow_free_config;
+ w->shutdown = NULL;
+ w->help = (struct ggo_help) {
+ .short_help = ao_write_args_info_help,
+ };
+ /* create detailed help containing all supported drivers/options */
+ for (i = 0; ao_write_args_info_detailed_help[i]; i++)
+ ; /* nothing */
+ num_lines = i;
+ dh = para_malloc((num_lines + 3) * sizeof(char *));
+ for (i = 0; i < num_lines; i++)
+ dh[i] = para_strdup(ao_write_args_info_detailed_help[i]);
+ dh[num_lines++] = para_strdup("libao drivers available on this host:");
+ dh[num_lines++] = para_strdup("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
+
+ ao_initialize();
+ driver_list = ao_driver_info_list(&num_drivers);
+
+ for (i = 0; i < num_drivers; i++) {
+ ao_info *info = driver_list[i];
+ char *keys = NULL, *tmp = NULL;
+
+ if (info->type == AO_TYPE_FILE)
+ continue;
+ for (j = 0; j < info->option_count; j++) {
+ tmp = make_message("%s%s%s", keys? keys : "",
+ keys? ", " : "",
+ info->options[j]);
+ free(keys);
+ keys = tmp;
+ }
+ dh = para_realloc(dh, (num_lines + 6) * sizeof(char *));
+ dh[num_lines++] = make_message("%s: %s", info->short_name, info->name);
+ dh[num_lines++] = make_message("priority: %d", info->priority);
+ dh[num_lines++] = make_message("keys: %s", keys? keys : "[none]");
+ dh[num_lines++] = make_message("comment: %s", info->comment?
+ info->comment : "[none]");
+ dh[num_lines++] = para_strdup(NULL);
+ free(keys);
+ }
+ dh[num_lines] = NULL;
+ w->help.detailed_help = (const char **)dh;
+ ao_cmdline_parser_free(&dummy);
+ ao_shutdown();
+}
+
CPPFLAGS="$OLD_CPPFLAGS"
LDFLAGS="$OLD_LDFLAGS"
LIBS="$OLD_LIBS"
+########################################################################### libao
+OLD_CPPFLAGS="$CPPFLAGS"
+OLD_LD_FLAGS="$LDFLAGS"
+OLD_LIBS="$LIBS"
+
+have_ao="yes"
+AC_ARG_WITH(ao_headers, [AC_HELP_STRING(--with-ao-headers=dir,
+ [look for ao/ao.h also in dir])])
+if test -n "$with_ao_headers"; then
+ ao_cppflags="-I$with_ao_headers"
+ CPPFLAGS="$CPPFLAGS $ao_cppflags"
+fi
+AC_ARG_WITH(ao_libs, [AC_HELP_STRING(--with-ao-libs=dir,
+ [look for libao also in dir])])
+if test -n "$with_ao_libs"; then
+ ao_libs="-L$with_ao_libs"
+ LDFLAGS="$LDFLAGS $ao_libs"
+fi
+msg="no libao support for para_audiod/para_write"
+AC_CHECK_HEADERS([ao/ao.h], [
+ ], [
+ have_ao="no"
+ AC_MSG_WARN([ao.h not found, $msg])
+])
+if test "$have_ao" = "yes"; then
+ AC_CHECK_LIB([ao], [ao_initialize], [], [
+ have_ao="no"
+ AC_MSG_WARN([ao lib not found or not working, $msg])
+ ])
+fi
+if test "$have_ao" = "yes"; then
+ AC_CHECK_HEADERS([pthread.h], [
+ ], [
+ have_ao="no"
+ AC_MSG_WARN([pthread.h not found, $msg])
+ ])
+fi
+if test "$have_ao" = "yes"; then
+ AC_CHECK_LIB([pthread], [pthread_create], [], [
+ have_ao="no"
+ AC_MSG_WARN([pthread lib not found or not working, $msg])
+ ])
+fi
+if test "$have_ao" = "yes"; then
+ all_errlist_objs="$all_errlist_objs ao_write"
+ audiod_errlist_objs="$audiod_errlist_objs ao_write"
+ audiod_cmdline_objs="$audiod_cmdline_objs add_cmdline(ao_write)"
+ audiod_ldflags="$audiod_ldflags -lao -lpthread"
+
+ write_errlist_objs="$write_errlist_objs ao_write"
+ write_cmdline_objs="$write_cmdline_objs add_cmdline(ao_write)"
+ write_ldflags="$write_ldflags $ao_libs -lao -lpthread"
+ writers="$writers ao"
+ AC_SUBST(ao_cppflags)
+fi
+
+CPPFLAGS="$OLD_CPPFLAGS"
+LDFLAGS="$OLD_LDFLAGS"
+LIBS="$OLD_LIBS"
+
+
AC_SUBST(install_sh, [$INSTALL])
AC_CONFIG_FILES([Makefile])
projects / paraslash.git / commitdiff