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ringbuffer: allow for custom commit functions

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Allow subclasses to override the commit method.
This commit is contained in:
Wim Taymans 2009-04-09 18:04:44 +02:00
parent cae2981f83
commit e6798c5cce
2 changed files with 69 additions and 42 deletions
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104
gst-libs/gst/audio/gstringbuffer.c
View file

@ -52,6 +52,8 @@ static void gst_ring_buffer_dispose (GObject * object);
static void gst_ring_buffer_finalize (GObject * object);
static gboolean gst_ring_buffer_pause_unlocked (GstRingBuffer * buf);
static guint default_commit (GstRingBuffer * buf, guint64 * sample,
guchar * data, gint in_samples, gint out_samples, gint * accum);
static GstObjectClass *parent_class = NULL;
@ -89,14 +91,18 @@ gst_ring_buffer_class_init (GstRingBufferClass * klass)
{
GObjectClass *gobject_class;
GstObjectClass *gstobject_class;
GstRingBufferClass *gstringbuffer_class;
gobject_class = (GObjectClass *) klass;
gstobject_class = (GstObjectClass *) klass;
gstringbuffer_class = (GstRingBufferClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_ring_buffer_dispose);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_ring_buffer_finalize);
gstringbuffer_class->commit = GST_DEBUG_FUNCPTR (default_commit);
}
static void
@ -1525,43 +1531,8 @@ G_STMT_START { \
GST_DEBUG ("rev_down end %d/%d",*accum,*toprocess); \
} G_STMT_END
/**
* gst_ring_buffer_commit_full:
* @buf: the #GstRingBuffer to commit
* @sample: the sample position of the data
* @data: the data to commit
* @in_samples: the number of samples in the data to commit
* @out_samples: the number of samples to write to the ringbuffer
* @accum: accumulator for rate conversion.
*
* Commit @in_samples samples pointed to by @data to the ringbuffer @buf.
*
* @in_samples and @out_samples define the rate conversion to perform on the the
* samples in @data. For negative rates, @out_samples must be negative and
* @in_samples positive.
*
* When @out_samples is positive, the first sample will be written at position @sample
* in the ringbuffer. When @out_samples is negative, the last sample will be written to
* @sample in reverse order.
*
* @out_samples does not need to be a multiple of the segment size of the ringbuffer
* although it is recommended for optimal performance.
*
* @accum will hold a temporary accumulator used in rate conversion and should be
* set to 0 when this function is first called. In case the commit operation is
* interrupted, one can resume the processing by passing the previously returned
* @accum value back to this function.
*
* MT safe.
*
* Returns: The number of samples written to the ringbuffer or -1 on error. The
* number of samples written can be less than @out_samples when @buf was interrupted
* with a flush or stop.
*
* Since: 0.10.11.
*/
guint
gst_ring_buffer_commit_full (GstRingBuffer * buf, guint64 * sample,
static guint
default_commit (GstRingBuffer * buf, guint64 * sample,
guchar * data, gint in_samples, gint out_samples, gint * accum)
{
gint segdone;
@ -1572,10 +1543,6 @@ gst_ring_buffer_commit_full (GstRingBuffer * buf, guint64 * sample,
gint inr, outr;
gboolean reverse;
if (G_UNLIKELY (in_samples == 0 || out_samples == 0))
return in_samples;
g_return_val_if_fail (GST_IS_RING_BUFFER (buf), -1);
g_return_val_if_fail (buf->data != NULL, -1);
g_return_val_if_fail (data != NULL, -1);
@ -1693,6 +1660,61 @@ not_started:
}
}
/**
* gst_ring_buffer_commit_full:
* @buf: the #GstRingBuffer to commit
* @sample: the sample position of the data
* @data: the data to commit
* @in_samples: the number of samples in the data to commit
* @out_samples: the number of samples to write to the ringbuffer
* @accum: accumulator for rate conversion.
*
* Commit @in_samples samples pointed to by @data to the ringbuffer @buf.
*
* @in_samples and @out_samples define the rate conversion to perform on the the
* samples in @data. For negative rates, @out_samples must be negative and
* @in_samples positive.
*
* When @out_samples is positive, the first sample will be written at position @sample
* in the ringbuffer. When @out_samples is negative, the last sample will be written to
* @sample in reverse order.
*
* @out_samples does not need to be a multiple of the segment size of the ringbuffer
* although it is recommended for optimal performance.
*
* @accum will hold a temporary accumulator used in rate conversion and should be
* set to 0 when this function is first called. In case the commit operation is
* interrupted, one can resume the processing by passing the previously returned
* @accum value back to this function.
*
* MT safe.
*
* Returns: The number of samples written to the ringbuffer or -1 on error. The
* number of samples written can be less than @out_samples when @buf was interrupted
* with a flush or stop.
*
* Since: 0.10.11.
*/
guint
gst_ring_buffer_commit_full (GstRingBuffer * buf, guint64 * sample,
guchar * data, gint in_samples, gint out_samples, gint * accum)
{
GstRingBufferClass *rclass;
guint res = -1;
g_return_val_if_fail (GST_IS_RING_BUFFER (buf), -1);
if (G_UNLIKELY (in_samples == 0 || out_samples == 0))
return in_samples;
rclass = GST_RING_BUFFER_GET_CLASS (buf);
if (G_LIKELY (rclass->commit))
res = rclass->commit (buf, sample, data, in_samples, out_samples, accum);
return res;
}
/**
* gst_ring_buffer_commit:
* @buf: the #GstRingBuffer to commit

7
gst-libs/gst/audio/gstringbuffer.h
View file

@ -300,6 +300,7 @@ struct _GstRingBuffer {
* @delay: get number of samples queued in device
* @activate: activate the thread that starts pulling and monitoring the
* consumed segments in the device. Since 0.10.22
* @commit: write samples into the ringbuffer
*
* The vmethods that subclasses can override to implement the ringbuffer.
*/
@ -322,8 +323,12 @@ struct _GstRingBufferClass {
/* ABI added */
gboolean (*activate) (GstRingBuffer *buf, gboolean active);
guint (*commit) (GstRingBuffer * buf, guint64 *sample,
guchar * data, gint in_samples,
gint out_samples, gint * accum);
/*< private >*/
gpointer _gst_reserved[GST_PADDING - 1];
gpointer _gst_reserved[GST_PADDING - 2];
};
GType gst_ring_buffer_get_type(void);