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GStreamer Base Plugins 0.10 Library Reference Manual | ![]() |
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gsttunergsttuner — interface for elements that provide tuner operations |
#include <gst/interfaces/tuner.h> GstTuner; GstTunerClass; const GList* gst_tuner_list_channels (GstTuner *tuner); GstTunerChannel* gst_tuner_get_channel (GstTuner *tuner); void gst_tuner_set_channel (GstTuner *tuner, GstTunerChannel *channel); const GList* gst_tuner_list_norms (GstTuner *tuner); GstTunerNorm* gst_tuner_get_norm (GstTuner *tuner); void gst_tuner_set_norm (GstTuner *tuner, GstTunerNorm *norm); void gst_tuner_set_frequency (GstTuner *tuner, GstTunerChannel *channel, gulong frequency); gint gst_tuner_signal_strength (GstTuner *tuner, GstTunerChannel *channel); GstTunerNorm* gst_tuner_find_norm_by_name (GstTuner *tuner, gchar *norm); GstTunerChannel* gst_tuner_find_channel_by_name (GstTuner *tuner, gchar *channel); void gst_tuner_channel_changed (GstTuner *tuner, GstTunerChannel *channel); void gst_tuner_norm_changed (GstTuner *tuner, GstTunerNorm *norm); void gst_tuner_frequency_changed (GstTuner *tuner, GstTunerChannel *channel, gulong frequency); void gst_tuner_signal_changed (GstTuner *tuner, GstTunerChannel *channel, gint signal);
typedef struct { GTypeInterface klass; /* virtual functions */ const GList * (* list_channels) (GstTuner *tuner); void (* set_channel) (GstTuner *tuner, GstTunerChannel *channel); GstTunerChannel * (* get_channel) (GstTuner *tuner); const GList * (* list_norms) (GstTuner *tuner); void (* set_norm) (GstTuner *tuner, GstTunerNorm *norm); GstTunerNorm *(* get_norm) (GstTuner *tuner); void (* set_frequency) (GstTuner *tuner, GstTunerChannel *channel, gulong frequency); gulong (* get_frequency) (GstTuner *tuner, GstTunerChannel *channel); gint (* signal_strength) (GstTuner *tuner, GstTunerChannel *channel); /* signals */ void (*channel_changed) (GstTuner *tuner, GstTunerChannel *channel); void (*norm_changed) (GstTuner *tuner, GstTunerNorm *norm); void (*frequency_changed) (GstTuner *tuner, GstTunerChannel *channel, gulong frequency); void (*signal_changed) (GstTuner *tuner, GstTunerChannel *channel, gint signal); gpointer _gst_reserved[GST_PADDING]; } GstTunerClass;
const GList* gst_tuner_list_channels (GstTuner *tuner);
Retrieve a list of channels (e.g. 'composite', 's-video', ...) from the given tuner object.
tuner : |
the GstTuner (a GstElement) to get the channels from. |
Returns : | a list of channels available on this tuner. |
GstTunerChannel* gst_tuner_get_channel (GstTuner *tuner);
tuner : |
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Returns : |
void gst_tuner_set_channel (GstTuner *tuner, GstTunerChannel *channel);
Tunes the object to the given channel.
tuner : |
the GstTuner (a GstElement) that owns the channel. |
channel : |
the channel to tune to. |
GstTunerNorm* gst_tuner_get_norm (GstTuner *tuner);
Get the current video norm from the given tuner object for the currently selected channel.
tuner : |
the GstTuner (a GstElement) to get the current norm from. |
Returns : | the current norm. |
void gst_tuner_set_norm (GstTuner *tuner, GstTunerNorm *norm);
Changes the video norm on this tuner to the given norm.
tuner : |
the GstTuner (a GstElement) to set the norm on. |
norm : |
the norm to use for the current channel. |
void gst_tuner_set_frequency (GstTuner *tuner, GstTunerChannel *channel, gulong frequency);
Sets a tuning frequency on the given tuner/channel. Note that this
requires the given channel to be a "tuning" channel, which can be
checked using GST_TUNER_CHANNEL_HAS_FLAG()
, with the proper flag
being GST_TUNER_CHANNEL_FREQUENCY.
tuner : |
the Gsttuner (a GstElement) that owns the given channel. |
channel : |
the GstTunerChannel to set the frequency on. |
frequency : |
the frequency to tune in to. |
gint gst_tuner_signal_strength (GstTuner *tuner, GstTunerChannel *channel);
tuner : |
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channel : |
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Returns : |
GstTunerNorm* gst_tuner_find_norm_by_name (GstTuner *tuner, gchar *norm);
tuner : |
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norm : |
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Returns : |
GstTunerChannel* gst_tuner_find_channel_by_name (GstTuner *tuner, gchar *channel);
tuner : |
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channel : |
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Returns : |
void gst_tuner_channel_changed (GstTuner *tuner, GstTunerChannel *channel);
tuner : |
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channel : |
void gst_tuner_norm_changed (GstTuner *tuner, GstTunerNorm *norm);
tuner : |
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norm : |
void gst_tuner_frequency_changed (GstTuner *tuner, GstTunerChannel *channel, gulong frequency);
tuner : |
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channel : |
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frequency : |
void gst_tuner_signal_changed (GstTuner *tuner, GstTunerChannel *channel, gint signal);
tuner : |
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channel : |
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signal : |
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