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-rw-r--r--audio/gstsbcdec.c138
-rw-r--r--audio/gstsbcdec.h6
2 files changed, 142 insertions, 2 deletions
diff --git a/audio/gstsbcdec.c b/audio/gstsbcdec.c
index 9d547eda..ceea4383 100644
--- a/audio/gstsbcdec.c
+++ b/audio/gstsbcdec.c
@@ -25,7 +25,7 @@
#include <config.h>
#endif
-#include "sbc.h"
+#include <string.h>
#include "gstsbcdec.h"
@@ -40,21 +40,155 @@ static const GstElementDetails sbc_dec_details =
"Decode a SBC audio stream",
"Marcel Holtmann <marcel@holtmann.org>");
+static GstStaticPadTemplate sbc_dec_sink_factory =
+ GST_STATIC_PAD_TEMPLATE("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS("audio/x-sbc"));
+
+static GstStaticPadTemplate sbc_dec_src_factory =
+ GST_STATIC_PAD_TEMPLATE("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS("audio/x-raw-int, "
+ "rate = (int) [ 6000, 48000 ], "
+ "channels = (int) [ 1, 2 ], "
+ "endianness = (int) BYTE_ORDER, "
+ "signed = (boolean) true, "
+ "width = (int) 16, "
+ "depth = (int) 16"));
+
+static GstFlowReturn sbc_dec_chain(GstPad *pad, GstBuffer *buffer)
+{
+ GstSbcDec *dec = GST_SBC_DEC(gst_pad_get_parent(pad));
+ GstFlowReturn res = GST_FLOW_OK;
+ guint size, offset = 0;
+ guint8 *data;
+ GstClockTime timestamp;
+
+ timestamp = GST_BUFFER_TIMESTAMP(buffer);
+
+ if (dec->buffer) {
+ GstBuffer *temp = buffer;
+ buffer = gst_buffer_span(dec->buffer, 0, buffer,
+ GST_BUFFER_SIZE(dec->buffer) + GST_BUFFER_SIZE(buffer));
+ gst_buffer_unref(temp);
+ gst_buffer_unref(dec->buffer);
+ dec->buffer = NULL;
+ }
+
+ data = GST_BUFFER_DATA(buffer);
+ size = GST_BUFFER_SIZE(buffer);
+
+ while (offset < size) {
+ GstBuffer *output;
+ GstPadTemplate *template;
+ GstCaps *caps, *temp;
+ int consumed;
+
+ consumed = sbc_decode(&dec->sbc, data + offset, size - offset);
+ if (consumed <= 0)
+ break;
+
+ caps = gst_caps_new_simple("audio/x-raw-int",
+ "rate", G_TYPE_INT, dec->sbc.rate,
+ "channels", G_TYPE_INT, dec->sbc.channels,
+ NULL);
+
+ template = gst_static_pad_template_get(&sbc_dec_src_factory);
+
+ temp = gst_caps_intersect(caps,
+ gst_pad_template_get_caps(template));
+
+ gst_caps_unref(caps);
+
+ res = gst_pad_alloc_buffer_and_set_caps(dec->srcpad,
+ GST_BUFFER_OFFSET_NONE,
+ dec->sbc.len, temp, &output);
+
+ gst_caps_unref(temp);
+
+ if (res != GST_FLOW_OK)
+ goto done;
+
+ memcpy(GST_BUFFER_DATA(output), dec->sbc.data, dec->sbc.len);
+
+ res = gst_pad_push(dec->srcpad, output);
+ if (res != GST_FLOW_OK)
+ goto done;
+
+ offset += consumed;
+ }
+
+ if (offset < size)
+ dec->buffer = gst_buffer_create_sub(buffer,
+ offset, size - offset);
+
+done:
+ gst_buffer_unref(buffer);
+ gst_object_unref(dec);
+
+ return res;
+}
+
+static GstStateChangeReturn sbc_dec_change_state(GstElement *element,
+ GstStateChange transition)
+{
+ GstSbcDec *dec = GST_SBC_DEC(element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ GST_DEBUG("Setup subband codec");
+ if (dec->buffer) {
+ gst_buffer_unref(dec->buffer);
+ dec->buffer = NULL;
+ }
+ sbc_init(&dec->sbc, 0);
+ break;
+
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ GST_DEBUG("Finish subband codec");
+ if (dec->buffer) {
+ gst_buffer_unref(dec->buffer);
+ dec->buffer = NULL;
+ }
+ sbc_finish(&dec->sbc);
+ break;
+
+ default:
+ break;
+ }
+
+ return parent_class->change_state(element, transition);
+}
+
static void gst_sbc_dec_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_dec_sink_factory));
+
+ gst_element_class_add_pad_template(element_class,
+ gst_static_pad_template_get(&sbc_dec_src_factory));
+
gst_element_class_set_details(element_class, &sbc_dec_details);
}
static void gst_sbc_dec_class_init(GstSbcDecClass *klass)
{
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS(klass);
+
parent_class = g_type_class_peek_parent(klass);
+ gstelement_class->change_state = GST_DEBUG_FUNCPTR(sbc_dec_change_state);
+
GST_DEBUG_CATEGORY_INIT(sbc_dec_debug, "sbcdec", 0,
"SBC decoding element");
}
-static void gst_sbc_dec_init(GstSbcDec *sbcdec, GstSbcDecClass *klass)
+static void gst_sbc_dec_init(GstSbcDec *self, GstSbcDecClass *klass)
{
+ self->sinkpad = gst_pad_new_from_static_template(&sbc_dec_sink_factory, "sink");
+ gst_pad_set_chain_function(self->sinkpad, GST_DEBUG_FUNCPTR(sbc_dec_chain));
+ gst_element_add_pad(GST_ELEMENT(self), self->sinkpad);
+
+ self->srcpad = gst_pad_new_from_static_template(&sbc_dec_src_factory, "src");
+ gst_element_add_pad(GST_ELEMENT(self), self->srcpad);
}
diff --git a/audio/gstsbcdec.h b/audio/gstsbcdec.h
index 0737b9d9..4a6922a0 100644
--- a/audio/gstsbcdec.h
+++ b/audio/gstsbcdec.h
@@ -23,6 +23,8 @@
#include <gst/gst.h>
+#include "sbc.h"
+
G_BEGIN_DECLS
#define GST_TYPE_SBC_DEC \
@@ -44,6 +46,10 @@ struct _GstSbcDec {
GstPad *sinkpad;
GstPad *srcpad;
+
+ GstBuffer *buffer;
+
+ sbc_t sbc;
};
struct _GstSbcDecClass {