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authorMarcel Holtmann <marcel@holtmann.org>2007-08-25 19:32:03 +0000
committerMarcel Holtmann <marcel@holtmann.org>2007-08-25 19:32:03 +0000
commitd542fb37a81d1d96604d41b36a6d6b11087ba2da (patch)
treedef78906f93346b776df63bebdb334a8fa73acee /audio
parent80c75b2aeb116ae9eb70b864f5dac1891551787d (diff)
Implement full encoding support
Diffstat (limited to 'audio')
-rw-r--r--audio/gstsbcenc.c115
-rw-r--r--audio/gstsbcenc.h4
2 files changed, 117 insertions, 2 deletions
diff --git a/audio/gstsbcenc.c b/audio/gstsbcenc.c
index 6e63ac45..86a66270 100644
--- a/audio/gstsbcenc.c
+++ b/audio/gstsbcenc.c
@@ -25,7 +25,7 @@
#include <config.h>
#endif
-#include "sbc.h"
+#include <string.h>
#include "gstsbcenc.h"
@@ -40,21 +40,132 @@ static const GstElementDetails sbc_enc_details =
"Encode a SBC audio stream",
"Marcel Holtmann <marcel@holtmann.org>");
+static GstStaticPadTemplate sbc_enc_sink_factory =
+ GST_STATIC_PAD_TEMPLATE("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS("audio/x-raw-int, "
+ "rate = (int) { 16000, 32000, 44100, 48000 }, "
+ "channels = (int) [ 1, 2 ], "
+ "endianness = (int) BYTE_ORDER, "
+ "signed = (boolean) true, "
+ "width = (int) 16, "
+ "depth = (int) 16"));
+
+static GstStaticPadTemplate sbc_enc_src_factory =
+ GST_STATIC_PAD_TEMPLATE("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS("audio/x-sbc"));
+
+static GstFlowReturn sbc_enc_chain(GstPad *pad, GstBuffer *buffer)
+{
+ GstSbcEnc *enc = GST_SBC_ENC(gst_pad_get_parent(pad));
+ GstFlowReturn res = GST_FLOW_OK;
+ GstStructure *structure;
+ gint rate, channels;
+ guint size, offset = 0;
+ guint8 *data;
+
+ data = GST_BUFFER_DATA(buffer);
+ size = GST_BUFFER_SIZE(buffer);
+
+ structure = gst_caps_get_structure(GST_PAD_CAPS(pad), 0);
+ gst_structure_get_int(structure, "rate", &rate);
+ gst_structure_get_int(structure, "channels", &channels);
+
+ enc->sbc.rate = rate;
+ enc->sbc.channels = channels;
+ enc->sbc.subbands = 8;
+ enc->sbc.joint = 0;
+
+ while (offset < size) {
+ GstBuffer *output;
+ GstCaps *caps;
+ int consumed;
+
+ consumed = sbc_encode(&enc->sbc, data + offset, size - offset);
+ if (consumed <= 0)
+ break;
+
+ caps = GST_PAD_CAPS(enc->srcpad);
+
+ res = gst_pad_alloc_buffer_and_set_caps(enc->srcpad,
+ GST_BUFFER_OFFSET_NONE,
+ enc->sbc.len, caps, &output);
+
+ if (res != GST_FLOW_OK)
+ goto done;
+
+ memcpy(GST_BUFFER_DATA(output), enc->sbc.data, enc->sbc.len);
+
+ res = gst_pad_push(enc->srcpad, output);
+ if (res != GST_FLOW_OK)
+ goto done;
+
+ offset += consumed;
+ }
+
+ if (offset < size)
+ res = GST_FLOW_ERROR;
+
+done:
+ gst_buffer_unref(buffer);
+ gst_object_unref(enc);
+
+ return res;
+}
+
+static GstStateChangeReturn sbc_enc_change_state(GstElement *element,
+ GstStateChange transition)
+{
+ GstSbcEnc *enc = GST_SBC_ENC(element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ GST_DEBUG("Setup subband codec");
+ sbc_init(&enc->sbc, 0);
+ break;
+
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ GST_DEBUG("Finish subband codec");
+ sbc_finish(&enc->sbc);
+ break;
+
+ default:
+ break;
+ }
+
+ return parent_class->change_state(element, transition);
+}
+
static void gst_sbc_enc_base_init(gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS(g_class);
+ gst_element_class_add_pad_template(element_class,
+ gst_static_pad_template_get(&sbc_enc_sink_factory));
+
+ gst_element_class_add_pad_template(element_class,
+ gst_static_pad_template_get(&sbc_enc_src_factory));
+
gst_element_class_set_details(element_class, &sbc_enc_details);
}
static void gst_sbc_enc_class_init(GstSbcEncClass *klass)
{
+ GstElementClass *element_class = GST_ELEMENT_CLASS(klass);
+
parent_class = g_type_class_peek_parent(klass);
+ element_class->change_state = GST_DEBUG_FUNCPTR(sbc_enc_change_state);
+
GST_DEBUG_CATEGORY_INIT(sbc_enc_debug, "sbcenc", 0,
"SBC encoding element");
}
-static void gst_sbc_enc_init(GstSbcEnc *sbcenc, GstSbcEncClass *klass)
+static void gst_sbc_enc_init(GstSbcEnc *self, GstSbcEncClass *klass)
{
+ self->sinkpad = gst_pad_new_from_static_template(&sbc_enc_sink_factory, "sink");
+ gst_element_add_pad(GST_ELEMENT(self), self->sinkpad);
+
+ self->srcpad = gst_pad_new_from_static_template(&sbc_enc_src_factory, "src");
+ gst_pad_set_chain_function(self->sinkpad, GST_DEBUG_FUNCPTR(sbc_enc_chain));
+ gst_element_add_pad(GST_ELEMENT(self), self->srcpad);
}
diff --git a/audio/gstsbcenc.h b/audio/gstsbcenc.h
index 64457d21..491135c1 100644
--- a/audio/gstsbcenc.h
+++ b/audio/gstsbcenc.h
@@ -23,6 +23,8 @@
#include <gst/gst.h>
+#include "sbc.h"
+
G_BEGIN_DECLS
#define GST_TYPE_SBC_ENC \
@@ -44,6 +46,8 @@ struct _GstSbcEnc {
GstPad *sinkpad;
GstPad *srcpad;
+
+ sbc_t sbc;
};
struct _GstSbcEncClass {