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author | Wim Taymans <wim.taymans@gmail.com> | 2006-02-15 12:17:28 +0000 |
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committer | Wim Taymans <wim.taymans@gmail.com> | 2006-02-15 12:17:28 +0000 |
commit | 5e5386b43004e38fe50b4d51d90f945b2332bc9e (patch) | |
tree | b9646750ab01abdbe27c94895f6303282b5e5ffb /ext/hal/hal.c | |
parent | 7531337e949072e2e5ee6659e91962bb1835956b (diff) |
Add HAL sound device wrapper plugins. Closes #329106
Original commit message from CVS:
* configure.ac:
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-good-plugins-docs.sgml:
* docs/plugins/gst-plugins-good-plugins-sections.txt:
* docs/plugins/gst-plugins-good-plugins.hierarchy:
* ext/Makefile.am:
* ext/hal/Makefile.am:
* ext/hal/gsthalaudiosink.c: (gst_hal_audio_sink_base_init),
(gst_hal_audio_sink_class_init), (gst_hal_audio_sink_reset),
(gst_hal_audio_sink_init), (gst_hal_audio_sink_dispose),
(do_toggle_element), (gst_hal_audio_sink_set_property),
(gst_hal_audio_sink_get_property),
(gst_hal_audio_sink_change_state):
* ext/hal/gsthalaudiosink.h:
* ext/hal/gsthalaudiosrc.c: (gst_hal_audio_src_base_init),
(gst_hal_audio_src_class_init), (gst_hal_audio_src_reset),
(gst_hal_audio_src_init), (gst_hal_audio_src_dispose),
(do_toggle_element), (gst_hal_audio_src_set_property),
(gst_hal_audio_src_get_property), (gst_hal_audio_src_change_state):
* ext/hal/gsthalaudiosrc.h:
* ext/hal/gsthalelements.c: (plugin_init):
* ext/hal/gsthalelements.h:
* ext/hal/hal.c: (gst_hal_get_string),
(gst_hal_render_bin_from_udi), (gst_hal_get_audio_sink),
(gst_hal_get_audio_src):
* ext/hal/hal.h:
Add HAL sound device wrapper plugins. Closes #329106
Diffstat (limited to 'ext/hal/hal.c')
-rw-r--r-- | ext/hal/hal.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/ext/hal/hal.c b/ext/hal/hal.c new file mode 100644 index 00000000..9b55f6d6 --- /dev/null +++ b/ext/hal/hal.c @@ -0,0 +1,168 @@ +/* GStreamer + * Copyright (C) <2002> Thomas Vander Stichele <thomas@apestaart.org> + * Copyright (C) <2006> Jürg Billeter <j@bitron.ch> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/* + * this library handles interaction with Hal + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <string.h> +#include <glib.h> +#include "hal.h" + + +/* external functions */ + +/** + * gst_hal_get_string: + * @key: a #gchar corresponding to the key you want to get. + * + * Get Hal UDI @udi's string value. + * + * Returns: a newly allocated #gchar string containing the appropriate pipeline + * for UDI @udi, or NULL in the case of an error.. + */ +gchar * +gst_hal_get_string (const gchar * udi) +{ + DBusConnection *connection; + DBusError error; + LibHalContext *ctx; + char *type, *string; + char *element; + int card, device; + + dbus_error_init (&error); + + connection = dbus_bus_get (DBUS_BUS_SYSTEM, &error); + g_return_val_if_fail (connection != NULL, NULL); + + ctx = libhal_ctx_new (); + g_return_val_if_fail (ctx != NULL, NULL); + + libhal_ctx_set_dbus_connection (ctx, connection); + libhal_ctx_init (ctx, &error); + + string = NULL; + + if (libhal_device_query_capability (ctx, udi, "alsa", &error)) { + type = libhal_device_get_property_string (ctx, udi, "alsa.type", &error); + if (strcmp (type, "playback") == 0) { + element = "alsasink"; + } else if (strcmp (type, "capture") == 0) { + element = "alsasrc"; + } else { + element = NULL; + } + card = libhal_device_get_property_int (ctx, udi, "alsa.card", &error); + device = libhal_device_get_property_int (ctx, udi, "alsa.device", &error); + if (device == 0) { + /* handle default device specially to use + * dmix, dsnoop, and softvol if appropriate */ + string = g_strdup_printf ("%s device=default:%d", element, card); + } else { + string = + g_strdup_printf ("%s device=plughw:%d,%d", element, card, device); + } + } + + libhal_ctx_shutdown (ctx, &error); + libhal_ctx_free (ctx); + + dbus_error_free (&error); + + return string; +} + +/** + * gst_hal_render_bin_from_udi: + * @key: a #gchar string corresponding to a Hal UDI. + * + * Render bin from Hal UDI @udi. + * + * Returns: a #GstElement containing the rendered bin. + */ +GstElement * +gst_hal_render_bin_from_udi (const gchar * udi) +{ + GstElement *bin = NULL; + gchar *value; + + value = gst_hal_get_string (udi); + if (value) + bin = gst_parse_bin_from_description (value, TRUE, NULL); + g_free (value); + return bin; +} + +/** + * gst_hal_get_audio_sink: + * + * Render audio output bin from GStreamer Hal UDI. + * If no device with the specified UDI exists, the default audio sink for the + * platform is used (typically osssink or sunaudiosink). + * + * Returns: a #GstElement containing the audio output bin, or NULL if + * everything failed. + */ +GstElement * +gst_hal_get_audio_sink (const gchar * udi) +{ + GstElement *ret = gst_hal_render_bin_from_udi (udi); + + if (!ret) { + ret = gst_element_factory_make (DEFAULT_AUDIOSINK, NULL); + + if (!ret) + g_warning ("No Hal default audio sink key and %s doesn't work", + DEFAULT_AUDIOSINK); + } + + return ret; +} + +/** + * gst_hal_get_audio_src: + * + * Render audio acquisition bin from GStreamer Hal UDI. + * If no device with the specified UDI exists, the default audio source for the + * plaform is used (typically osssrc or sunaudiosrc). + * + * Returns: a #GstElement containing the audio source bin, or NULL if + * everything failed. + */ +GstElement * +gst_hal_get_audio_src (const gchar * udi) +{ + GstElement *ret = gst_hal_render_bin_from_udi (udi); + + if (!ret) { + ret = gst_element_factory_make (DEFAULT_AUDIOSRC, NULL); + + if (!ret) + g_warning ("No Hal default audio src key and %s doesn't work", + DEFAULT_AUDIOSRC); + } + + return ret; +} |