summaryrefslogtreecommitdiffstats
path: root/gst/law/alaw-encode.c
diff options
context:
space:
mode:
Diffstat (limited to 'gst/law/alaw-encode.c')
-rw-r--r--gst/law/alaw-encode.c155
1 files changed, 75 insertions, 80 deletions
diff --git a/gst/law/alaw-encode.c b/gst/law/alaw-encode.c
index 6a6708ab..b6e4825a 100644
--- a/gst/law/alaw-encode.c
+++ b/gst/law/alaw-encode.c
@@ -27,14 +27,6 @@
extern GstPadTemplate *alawenc_src_template, *alawenc_sink_template;
-/* elementfactory information */
-static GstElementDetails alawenc_details = {
- "PCM to A Law conversion",
- "Codec/Encoder/Audio",
- "Convert 16bit PCM to 8bit A law",
- "Zaheer Merali <zaheer@bellworldwide.net>"
-};
-
/* Stereo signals and args */
enum
{
@@ -51,11 +43,6 @@ static void gst_alawenc_class_init (GstALawEncClass * klass);
static void gst_alawenc_base_init (GstALawEncClass * klass);
static void gst_alawenc_init (GstALawEnc * alawenc);
-static void gst_alawenc_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec);
-static void gst_alawenc_get_property (GObject * object, guint prop_id,
- GValue * value, GParamSpec * pspec);
-
static void gst_alawenc_chain (GstPad * pad, GstData * _data);
/*
@@ -127,31 +114,73 @@ static GstElementClass *parent_class = NULL;
/*static guint gst_stereo_signals[LAST_SIGNAL] = { 0 }; */
+static GstCaps *
+alawenc_getcaps (GstPad * pad)
+{
+ GstALawEnc *alawenc = GST_ALAWENC (gst_pad_get_parent (pad));
+ GstPad *otherpad;
+ GstCaps *base_caps, *othercaps;
+ GstStructure *structure;
+ const GValue *rate, *chans;
+
+ if (pad == alawenc->srcpad) {
+ otherpad = alawenc->sinkpad;
+ base_caps = gst_caps_new_simple ("audio/x-mulaw", NULL);
+ } else {
+ otherpad = alawenc->srcpad;
+ base_caps = gst_caps_new_simple ("audio/x-raw-int",
+ "width", G_TYPE_INT, 16, "depth", G_TYPE_INT, 16,
+ "endianness", G_TYPE_INT, G_BYTE_ORDER, NULL);
+ }
+ othercaps = gst_pad_get_allowed_caps (otherpad);
+
+ /* Not fully correct, but usually, all structures in a caps have
+ * the same samplerate and channels range. */
+ structure = gst_caps_get_structure (othercaps, 0);
+ rate = gst_structure_get_value (structure, "rate");
+ chans = gst_structure_get_value (structure, "channels");
+ if (!rate || !chans)
+ return gst_caps_new_empty ();
+
+ /* Set the samplerate/channels on the to-be-returned caps */
+ structure = gst_caps_get_structure (base_caps, 0);
+ gst_structure_set_value (structure, "rate", rate);
+ gst_structure_set_value (structure, "channels", chans);
+ gst_caps_free (othercaps);
+
+ return base_caps;
+}
+
static GstPadLinkReturn
alawenc_link (GstPad * pad, const GstCaps * caps)
{
- GstCaps *tempcaps;
- gint rate, channels;
+ GstALawEnc *alawenc = GST_ALAWENC (gst_pad_get_parent (pad));
+ GstPad *otherpad;
GstStructure *structure;
- gboolean ret;
-
- GstALawEnc *alawenc = GST_ALAWENC (GST_OBJECT_PARENT (pad));
+ const GValue *rate, *chans;
+ GstCaps *base_caps;
structure = gst_caps_get_structure (caps, 0);
-
- ret = gst_structure_get_int (structure, "rate", &rate);
- ret &= gst_structure_get_int (structure, "channels", &channels);
-
- if (!ret)
+ rate = gst_structure_get_value (structure, "rate");
+ chans = gst_structure_get_value (structure, "channels");
+ if (!rate || !chans)
return GST_PAD_LINK_REFUSED;
- tempcaps = gst_caps_new_simple ("audio/x-alaw",
- "depth", G_TYPE_INT, 8,
- "width", G_TYPE_INT, 8,
- "signed", G_TYPE_BOOLEAN, FALSE,
- "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, channels, NULL);
+ if (pad == alawenc->sinkpad) {
+ otherpad = alawenc->srcpad;
+ base_caps = gst_caps_new_simple ("audio/x-mulaw", NULL);
+ } else {
+ otherpad = alawenc->sinkpad;
+ base_caps = gst_caps_new_simple ("audio/x-raw-int",
+ "width", G_TYPE_INT, 16, "depth", G_TYPE_INT, 16,
+ "endianness", G_TYPE_INT, G_BYTE_ORDER, NULL);
+ }
+
+ structure = gst_caps_get_structure (base_caps, 0);
+ gst_structure_set_value (structure, "rate", rate);
+ gst_structure_set_value (structure, "channels", chans);
- return gst_pad_try_set_caps (alawenc->srcpad, tempcaps);
+ return gst_pad_try_set_caps (otherpad, base_caps);
}
GType
@@ -183,6 +212,12 @@ static void
gst_alawenc_base_init (GstALawEncClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+ GstElementDetails alawenc_details = {
+ "PCM to A Law conversion",
+ "Codec/Encoder/Audio",
+ "Convert 16bit PCM to 8bit A law",
+ "Zaheer Merali <zaheer@bellworldwide.net>"
+ };
gst_element_class_add_pad_template (element_class, alawenc_src_template);
gst_element_class_add_pad_template (element_class, alawenc_sink_template);
@@ -192,27 +227,21 @@ gst_alawenc_base_init (GstALawEncClass * klass)
static void
gst_alawenc_class_init (GstALawEncClass * klass)
{
- GObjectClass *gobject_class;
- GstElementClass *gstelement_class;
-
- gobject_class = (GObjectClass *) klass;
- gstelement_class = (GstElementClass *) klass;
-
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
-
- gobject_class->set_property = gst_alawenc_set_property;
- gobject_class->get_property = gst_alawenc_get_property;
}
static void
gst_alawenc_init (GstALawEnc * alawenc)
{
alawenc->sinkpad = gst_pad_new_from_template (alawenc_sink_template, "sink");
- alawenc->srcpad = gst_pad_new_from_template (alawenc_src_template, "src");
gst_pad_set_link_function (alawenc->sinkpad, alawenc_link);
-
- gst_element_add_pad (GST_ELEMENT (alawenc), alawenc->sinkpad);
+ gst_pad_set_getcaps_function (alawenc->sinkpad, alawenc_getcaps);
gst_pad_set_chain_function (alawenc->sinkpad, gst_alawenc_chain);
+ gst_element_add_pad (GST_ELEMENT (alawenc), alawenc->sinkpad);
+
+ alawenc->srcpad = gst_pad_new_from_template (alawenc_src_template, "src");
+ gst_pad_set_link_function (alawenc->srcpad, alawenc_link);
+ gst_pad_set_getcaps_function (alawenc->srcpad, alawenc_getcaps);
gst_element_add_pad (GST_ELEMENT (alawenc), alawenc->srcpad);
}
@@ -235,51 +264,17 @@ gst_alawenc_chain (GstPad * pad, GstData * _data)
g_return_if_fail (GST_IS_ALAWENC (alawenc));
linear_data = (gint16 *) GST_BUFFER_DATA (buf);
- outbuf = gst_buffer_new ();
- GST_BUFFER_DATA (outbuf) =
- (gchar *) g_new (guint8, GST_BUFFER_SIZE (buf) / 2);
- GST_BUFFER_SIZE (outbuf) = GST_BUFFER_SIZE (buf) / 2;
-
-
+ outbuf = gst_buffer_new_and_alloc (GST_BUFFER_SIZE (buf) / 2);
+ GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
+ GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf);
alaw_data = (guint8 *) GST_BUFFER_DATA (outbuf);
+
for (i = 0; i < GST_BUFFER_SIZE (outbuf); i++) {
*alaw_data = s16_to_alaw (*linear_data);
alaw_data++;
linear_data++;
}
+
gst_buffer_unref (buf);
gst_pad_push (alawenc->srcpad, GST_DATA (outbuf));
}
-
-static void
-gst_alawenc_set_property (GObject * object, guint prop_id, const GValue * value,
- GParamSpec * pspec)
-{
- GstALawEnc *alawenc;
-
- /* it's not null if we got it, but it might not be ours */
- g_return_if_fail (GST_IS_ALAWENC (object));
- alawenc = GST_ALAWENC (object);
-
- switch (prop_id) {
- default:
- break;
- }
-}
-
-static void
-gst_alawenc_get_property (GObject * object, guint prop_id, GValue * value,
- GParamSpec * pspec)
-{
- GstALawEnc *alawenc;
-
- /* it's not null if we got it, but it might not be ours */
- g_return_if_fail (GST_IS_ALAWENC (object));
- alawenc = GST_ALAWENC (object);
-
- switch (prop_id) {
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
generated by cgit (git 2.34.1) at 2025-06-14 23:14:08 +0000