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gst/audioconvert/gstaudioconvert.c: Make audioconvert GAP-aware by outputting silence buffers when the input has the ...

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Original commit message from CVS:
* gst/audioconvert/gstaudioconvert.c: (gst_audio_convert_init),
(gst_audio_convert_create_silence_buffer),
(gst_audio_convert_transform):
Make audioconvert GAP-aware by outputting silence buffers when the
input has the GAP flag set. This is up to 8x faster.
Based on a patch by Stefan Kost. Fixes bug #517813.
This commit is contained in:
Sebastian Dröge 2008-03-21 15:58:44 +00:00
parent cd5f49f47f
commit 88136fc11a
2 changed files with 92 additions and 3 deletions
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9
ChangeLog
View file

@ -1,3 +1,12 @@
2008-03-21 Sebastian Dröge <slomo@circular-chaos.org>
* gst/audioconvert/gstaudioconvert.c: (gst_audio_convert_init),
(gst_audio_convert_create_silence_buffer),
(gst_audio_convert_transform):
Make audioconvert GAP-aware by outputting silence buffers when the
input has the GAP flag set. This is up to 8x faster.
Based on a patch by Stefan Kost. Fixes bug #517813.
2008-03-21 Sebastian Dröge <slomo@circular-chaos.org>
* gst/volume/gstvolume.c: (volume_process_double):

80
gst/audioconvert/gstaudioconvert.c
View file

@ -293,6 +293,8 @@ gst_audio_convert_init (GstAudioConvert * this, GstAudioConvertClass * g_class)
this->dither = DITHER_TPDF;
this->ns = NOISE_SHAPING_NONE;
memset (&this->ctx, 0, sizeof (AudioConvertCtx));
gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (this), TRUE);
}
static void
@ -946,6 +948,79 @@ gst_audio_convert_transform_ip (GstBaseTransform * base, GstBuffer * buf)
return GST_FLOW_OK;
}
static void
gst_audio_convert_create_silence_buffer (GstAudioConvert * this, gpointer dst,
gint size)
{
if (this->ctx.out.is_int && !this->ctx.out.sign) {
gint i;
switch (this->ctx.out.width) {
case 8:{
guint8 zero = 0x80 >> (8 - this->ctx.out.depth);
memset (dst, zero, size);
break;
}
case 16:{
guint16 *data = (guint16 *) dst;
guint16 zero = 0x8000 >> (16 - this->ctx.out.depth);
if (this->ctx.out.endianness == G_LITTLE_ENDIAN)
zero = GUINT16_TO_LE (zero);
else
zero = GUINT16_TO_BE (zero);
size /= 2;
for (i = 0; i < size; i++)
data[i] = zero;
break;
}
case 24:{
guint32 zero = 0x800000 >> (24 - this->ctx.out.depth);
guint8 *data = (guint8 *) dst;
if (this->ctx.out.endianness == G_LITTLE_ENDIAN) {
for (i = 0; i < size; i += 3) {
data[i] = zero & 0xff;
data[i + 1] = (zero >> 8) & 0xff;
data[i + 2] = (zero >> 16) & 0xff;
}
} else {
for (i = 0; i < size; i += 3) {
data[i + 2] = zero & 0xff;
data[i + 1] = (zero >> 8) & 0xff;
data[i] = (zero >> 16) & 0xff;
}
}
break;
}
case 32:{
guint32 *data = (guint32 *) dst;
guint32 zero = (0x80000000 >> (32 - this->ctx.out.depth));
if (this->ctx.out.endianness == G_LITTLE_ENDIAN)
zero = GUINT32_TO_LE (zero);
else
zero = GUINT32_TO_BE (zero);
size /= 4;
for (i = 0; i < size; i++)
data[i] = zero;
break;
}
default:
memset (dst, 0, size);
g_return_if_reached ();
break;
}
} else {
memset (dst, 0, size);
}
}
static GstFlowReturn
gst_audio_convert_transform (GstBaseTransform * base, GstBuffer * inbuf,
GstBuffer * outbuf)
@ -978,9 +1053,14 @@ gst_audio_convert_transform (GstBaseTransform * base, GstBuffer * inbuf,
dst = GST_BUFFER_DATA (outbuf);
/* and convert the samples */
if (!GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP)) {
if (!(res = audio_convert_convert (&this->ctx, src, dst,
samples, gst_buffer_is_writable (inbuf))))
goto convert_error;
} else {
/* Create silence buffer */
gst_audio_convert_create_silence_buffer (this, dst, outsize);
}
GST_BUFFER_SIZE (outbuf) = outsize;