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jack: improve process_cb

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This commit is contained in:
Tristan Matthews 2010-05-11 17:56:31 -04:00 committed by Wim Taymans
parent 59fddc9237
commit 7f172b2b96
2 changed files with 17 additions and 24 deletions
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40
ext/jack/gstjackaudiosrc.c
View file

@ -98,6 +98,7 @@ gst_jack_audio_src_allocate_channels (GstJackAudioSrc * src, gint channels)
/* alloc enough input ports */
src->ports = g_realloc (src->ports, sizeof (jack_port_t *) * channels);
src->buffers = g_realloc (src->buffers, sizeof (sample_t *) * channels);
/* create an input port for each channel */
while (src->port_count < channels) {
@ -138,6 +139,8 @@ gst_jack_audio_src_free_channels (GstJackAudioSrc * src)
}
g_free (src->ports);
src->ports = NULL;
g_free (src->buffers);
src->buffers = NULL;
}
/* ringbuffer abstract base class */
@ -203,47 +206,35 @@ jack_process_cb (jack_nframes_t nframes, void *arg)
{
GstJackAudioSrc *src;
GstRingBuffer *buf;
GstJackRingBuffer *abuf;
gint len, givenLen;
guint8 *writeptr, *dataStart;
guint8 *writeptr;
gint writeseg;
gint channels, i, j;
sample_t **buffers, *data;
sample_t *data;
buf = GST_RING_BUFFER_CAST (arg);
abuf = GST_JACK_RING_BUFFER_CAST (arg);
src = GST_JACK_AUDIO_SRC (GST_OBJECT_PARENT (buf));
channels = buf->spec.channels;
len = sizeof (sample_t) * nframes * channels;
/* alloc pointers to samples */
buffers = g_alloca (sizeof (sample_t *) * channels);
data = g_alloca (len);
/* get input buffers */
for (i = 0; i < channels; i++)
buffers[i] = (sample_t *) jack_port_get_buffer (src->ports[i], nframes);
//writeptr = data;
dataStart = (guint8 *) data;
/* the samples in the jack input buffers have to be interleaved into the
* ringbuffer
*/
for (i = 0; i < nframes; ++i)
for (j = 0; j < channels; ++j)
*data++ = buffers[j][i];
src->buffers[i] =
(sample_t *) jack_port_get_buffer (src->ports[i], nframes);
if (gst_ring_buffer_prepare_read (buf, &writeseg, &writeptr, &givenLen)) {
memcpy (writeptr, (char *) dataStart, givenLen);
/* the samples in the jack input buffers have to be interleaved into the
* ringbuffer
*/
data = (sample_t *) writeptr;
for (i = 0; i < nframes; ++i)
for (j = 0; j < channels; ++j)
*data++ = src->buffers[j][i];
GST_DEBUG ("copy %d frames: %p, %d bytes, %d channels", nframes, writeptr,
len / channels, channels);
/* clear written samples in the ringbuffer */
// gst_ring_buffer_clear(buf, 0);
/* we wrote one segment */
gst_ring_buffer_advance (buf, 1);
}
@ -728,6 +719,7 @@ gst_jack_audio_src_init (GstJackAudioSrc * src, GstJackAudioSrcClass * gclass)
src->server = g_strdup (DEFAULT_PROP_SERVER);
src->ports = NULL;
src->port_count = 0;
src->buffers = NULL;
}
static void

1
ext/jack/gstjackaudiosrc.h
View file

@ -81,6 +81,7 @@ struct _GstJackAudioSrc
/* our ports */
jack_port_t **ports;
int port_count;
sample_t **buffers;
};
struct _GstJackAudioSrcClass