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151 lines
3.9 KiB
C
151 lines
3.9 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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*
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* gstosshelper.h: helper functions for OSS Device handling. This
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* set of functions takes care of device setting/getting,
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* opening/closing devices, parsing caps to OSS formats/settings
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* or the other way around, device probing, supported format
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* probing and mixer integration.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_OSS_HELPER_H__
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#define __GST_OSS_HELPER_H__
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#include <gst/gst.h>
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#include <sys/types.h>
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/* debugging category */
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GST_DEBUG_CATEGORY_EXTERN (oss_debug);
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#define GST_CAT_DEFAULT oss_debug
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G_BEGIN_DECLS
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enum {
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ARG_0,
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OSS_ARG_DEVICE,
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OSS_ARG_MIXER_DEVICE,
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OSS_ARG_DEVICE_NAME,
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OSS_ARG_0
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};
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typedef enum {
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GST_OSS_MODE_READ,
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GST_OSS_MODE_WRITE,
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GST_OSS_MODE_VOLUME,
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GST_OSS_MODE_MIXER
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} GstOssOpenMode;
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/*
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* Embed those two in whatever object you're creating.
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*/
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typedef struct _GstOssDeviceCombination {
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gchar *dsp, *mixer;
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dev_t dev;
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} GstOssDeviceCombination;
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typedef struct _GstOssDevice {
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/* device state */
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int fd;
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int caps; /* the capabilities */
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gint format;
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gint fragment;
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guint64 fragment_time;
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gint fragment_size;
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GstOssOpenMode mode;
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GstCaps *probed_caps;
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/* stats bytes per *second* */
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guint bps;
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/* sample width in bytes */
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guint sample_width;
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/* parameters */
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gint law;
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gint endianness;
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gboolean sign;
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gint width;
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gint depth;
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gint channels;
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gint rate;
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/* mixer stuff */
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GList *tracklist;
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guint32 stereomask,
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recdevs,
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recmask,
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mixcaps;
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gint mixer_fd;
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gchar *device_name;
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} GstOssDevice;
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/*
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* class/type/interface handling for mixer/device handling.
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*/
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void gst_oss_add_mixer_type (GType type);
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void gst_oss_add_device_properties (GstElementClass * klass);
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void gst_oss_set_device_property (GstElement * element,
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GstOssDeviceCombination * c,
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GstOssDevice * dev,
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guint prop_id,
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GParamSpec * pspec,
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const GValue * value);
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void gst_oss_get_device_property (GstElement * element,
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GstOssDeviceCombination * c,
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GstOssDevice * d,
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guint prop_id,
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GParamSpec * pspec,
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GValue * value);
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/*
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* device open/close.
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*/
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void gst_oss_init (GObject * obj,
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GstOssDeviceCombination * c,
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GstOssDevice * dev,
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GstOssOpenMode mode);
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void gst_oss_dispose (GstOssDeviceCombination * c,
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GstOssDevice * dev);
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gboolean gst_oss_open (GstElement * element,
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GstOssDeviceCombination * c,
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GstOssDevice * dev);
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void gst_oss_close (GstOssDevice * dev);
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/*
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* caps parsing/probing.
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*/
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gboolean gst_oss_parse_caps (GstOssDevice * dev,
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const GstCaps * caps);
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gboolean gst_oss_merge_fixed_caps (GstOssDevice * dev,
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GstCaps * caps);
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gboolean gst_oss_sync_parms (GstOssDevice * dev);
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void gst_oss_reset (GstOssDevice * dev);
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gboolean gst_oss_convert (GstOssDevice * dev,
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GstFormat src_format,
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gint64 src_value,
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GstFormat * dest_format,
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gint64 * dest_value);
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void gst_oss_probe_caps (GstOssDevice * dev);
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G_END_DECLS
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#endif /* __GST_OSS_HELPER_H__ */
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