sbc: Implement full parsing support

diff --git a/ext/sbc/gstsbcparse.c b/ext/sbc/gstsbcparse.c
new file mode 100644 (file)
index 0000000..5097a85
--- /dev/null
+++ b/ext/sbc/gstsbcparse.c
@@ -0,0 +1,194 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2004-2007  Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+
+#include "gstsbcparse.h"
+
+GST_DEBUG_CATEGORY_STATIC(sbc_parse_debug);
+#define GST_CAT_DEFAULT sbc_parse_debug
+
+GST_BOILERPLATE(GstSbcParse, gst_sbc_parse, GstElement, GST_TYPE_ELEMENT);
+
+static const GstElementDetails sbc_parse_details =
+       GST_ELEMENT_DETAILS("Bluetooth SBC parser",
+                               "Codec/Parser/Audio",
+                               "Parse a SBC audio stream",
+                               "Marcel Holtmann <marcel@holtmann.org>");
+
+static GstStaticPadTemplate sbc_parse_sink_factory =
+       GST_STATIC_PAD_TEMPLATE("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+               GST_STATIC_CAPS("audio/x-sbc"));
+
+static GstStaticPadTemplate sbc_parse_src_factory =
+       GST_STATIC_PAD_TEMPLATE("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+               GST_STATIC_CAPS("audio/x-sbc, "
+                               "rate = (int) { 16000, 32000, 44100, 48000 }, "
+                               "channels = (int) [ 1, 2 ], "
+                               "mode = (string) { mono, dual, stereo, joint }, "
+                               "blocks = (int) { 4, 8, 12, 16 }, "
+                               "subbands = (int) { 4, 8 }, "
+                               "allocation = (string) { snr, loudness }"));
+
+static GstFlowReturn sbc_parse_chain(GstPad *pad, GstBuffer *buffer)
+{
+       GstSbcParse *parse = GST_SBC_PARSE(gst_pad_get_parent(pad));
+       GstFlowReturn res = GST_FLOW_OK;
+       guint size, offset = 0;
+       guint8 *data;
+       GstClockTime timestamp;
+
+       timestamp = GST_BUFFER_TIMESTAMP(buffer);
+
+       if (parse->buffer) {
+               GstBuffer *temp = buffer;
+               buffer = gst_buffer_span(parse->buffer, 0, buffer,
+                       GST_BUFFER_SIZE(parse->buffer) + GST_BUFFER_SIZE(buffer));
+               gst_buffer_unref(temp);
+               gst_buffer_unref(parse->buffer);
+               parse->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_parse(&parse->sbc, data + offset, size - offset);
+               if (consumed <= 0)
+                       break;
+
+               caps = gst_caps_new_simple("audio/x-sbc",
+                               "rate", G_TYPE_INT, parse->sbc.rate,
+                               "channels", G_TYPE_INT, parse->sbc.channels,
+                               NULL);
+
+               template = gst_static_pad_template_get(&sbc_parse_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(parse->srcpad,
+                                               GST_BUFFER_OFFSET_NONE,
+                                               consumed, temp, &output);
+
+               gst_caps_unref(temp);
+
+               if (res != GST_FLOW_OK)
+                       goto done;
+
+               memcpy(GST_BUFFER_DATA(output), data + offset, consumed);
+
+               res = gst_pad_push(parse->srcpad, output);
+               if (res != GST_FLOW_OK)
+                       goto done;
+
+               offset += consumed;
+       }
+
+       if (offset < size)
+               parse->buffer = gst_buffer_create_sub(buffer,
+                                                       offset, size - offset);
+
+done:
+       gst_buffer_unref(buffer);
+       gst_object_unref(parse);
+
+       return res;
+}
+
+static GstStateChangeReturn sbc_parse_change_state(GstElement *element,
+                                               GstStateChange transition)
+{
+       GstSbcParse *parse = GST_SBC_PARSE(element);
+
+       switch (transition) {
+       case GST_STATE_CHANGE_READY_TO_PAUSED:
+               GST_DEBUG("Setup subband codec");
+               if (parse->buffer) {
+                       gst_buffer_unref(parse->buffer);
+                       parse->buffer = NULL;
+               }
+               sbc_init(&parse->sbc, 0);
+               break;
+
+       case GST_STATE_CHANGE_PAUSED_TO_READY:
+               GST_DEBUG("Finish subband codec");
+               if (parse->buffer) {
+                       gst_buffer_unref(parse->buffer);
+                       parse->buffer = NULL;
+               }
+               sbc_finish(&parse->sbc);
+               break;
+
+       default:
+               break;
+       }
+
+       return parent_class->change_state(element, transition);
+}
+
+static void gst_sbc_parse_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_parse_sink_factory));
+
+       gst_element_class_add_pad_template(element_class,
+               gst_static_pad_template_get(&sbc_parse_src_factory));
+
+       gst_element_class_set_details(element_class, &sbc_parse_details);
+}
+
+static void gst_sbc_parse_class_init(GstSbcParseClass *klass)
+{
+       GstElementClass *element_class = GST_ELEMENT_CLASS(klass);
+
+       parent_class = g_type_class_peek_parent(klass);
+
+       element_class->change_state = GST_DEBUG_FUNCPTR(sbc_parse_change_state);
+
+       GST_DEBUG_CATEGORY_INIT(sbc_parse_debug, "sbcparse", 0,
+                                               "SBC parsing element");
+}
+
+static void gst_sbc_parse_init(GstSbcParse *self, GstSbcParseClass *klass)
+{
+       self->sinkpad = gst_pad_new_from_static_template(&sbc_parse_sink_factory, "sink");
+       gst_pad_set_chain_function(self->sinkpad, GST_DEBUG_FUNCPTR(sbc_parse_chain));
+       gst_element_add_pad(GST_ELEMENT(self), self->sinkpad);
+
+       self->srcpad = gst_pad_new_from_static_template(&sbc_parse_src_factory, "src");
+       gst_element_add_pad(GST_ELEMENT(self), self->srcpad);
+}

diff --git a/ext/sbc/gstsbcparse.h b/ext/sbc/gstsbcparse.h
new file mode 100644 (file)
index 0000000..ceaf219
--- /dev/null
+++ b/ext/sbc/gstsbcparse.h
@@ -0,0 +1,61 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2004-2007  Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include <gst/gst.h>
+
+#include "sbc.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_SBC_PARSE \
+       (gst_sbc_parse_get_type())
+#define GST_SBC_PARSE(obj) \
+       (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SBC_PARSE,GstSbcParse))
+#define GST_SBC_PARSE_CLASS(klass) \
+       (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SBC_PARSE,GstSbcParseClass))
+#define GST_IS_SBC_PARSE(obj) \
+       (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SBC_PARSE))
+#define GST_IS_SBC_PARSE_CLASS(obj) \
+       (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SBC_PARSE))
+
+typedef struct _GstSbcParse GstSbcParse;
+typedef struct _GstSbcParseClass GstSbcParseClass;
+
+struct _GstSbcParse {
+       GstElement element;
+
+       GstPad *sinkpad;
+       GstPad *srcpad;
+
+       GstBuffer *buffer;
+
+       sbc_t sbc;
+};
+
+struct _GstSbcParseClass {
+       GstElementClass parent_class;
+};
+
+GType gst_sbc_parse_get_type(void);
+
+G_END_DECLS