summaryrefslogtreecommitdiffstats
path: root/ext/speex/gstspeexenc.c
diff options
context:
space:
mode:
Diffstat (limited to 'ext/speex/gstspeexenc.c')
-rw-r--r--ext/speex/gstspeexenc.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/ext/speex/gstspeexenc.c b/ext/speex/gstspeexenc.c
new file mode 100644
index 00000000..20bce443
--- /dev/null
+++ b/ext/speex/gstspeexenc.c
@@ -0,0 +1,251 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#include <string.h>
+
+#include "gstspeexenc.h"
+
+extern GstPadTemplate *speexenc_src_template, *speexenc_sink_template;
+
+/* elementfactory information */
+GstElementDetails gst_speexenc_details = {
+ "speex audio encoder",
+ "Codec/Audio/Encoder",
+ ".speex",
+ VERSION,
+ "Wim Taymans <wim.taymans@chello.be>",
+ "(C) 2000",
+};
+
+/* SpeexEnc signals and args */
+enum {
+ FRAME_ENCODED,
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum {
+ ARG_0,
+ /* FILL ME */
+};
+
+static void gst_speexenc_class_init (GstSpeexEnc *klass);
+static void gst_speexenc_init (GstSpeexEnc *speexenc);
+
+static void gst_speexenc_chain (GstPad *pad,GstBuffer *buf);
+static GstPadConnectReturn gst_speexenc_sinkconnect (GstPad *pad, GstCaps *caps);
+
+static GstElementClass *parent_class = NULL;
+static guint gst_speexenc_signals[LAST_SIGNAL] = { 0 };
+
+GType
+gst_speexenc_get_type (void)
+{
+ static GType speexenc_type = 0;
+
+ if (!speexenc_type) {
+ static const GTypeInfo speexenc_info = {
+ sizeof (GstSpeexEncClass),
+ NULL,
+ NULL,
+ (GClassInitFunc) gst_speexenc_class_init,
+ NULL,
+ NULL,
+ sizeof (GstSpeexEnc),
+ 0,
+ (GInstanceInitFunc) gst_speexenc_init,
+ };
+ speexenc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstSpeexEnc", &speexenc_info, 0);
+ }
+ return speexenc_type;
+}
+
+static void
+gst_speexenc_class_init (GstSpeexEnc *klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass*) klass;
+ gstelement_class = (GstElementClass*) klass;
+
+ parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+ gst_speexenc_signals[FRAME_ENCODED] =
+ g_signal_new ("frame_encoded", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GstSpeexEncClass, frame_encoded), NULL, NULL,
+ g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+}
+
+
+static void
+gst_speexenc_init (GstSpeexEnc *speexenc)
+{
+ /* create the sink and src pads */
+ speexenc->sinkpad = gst_pad_new_from_template (speexenc_sink_template, "sink");
+ gst_element_add_pad (GST_ELEMENT (speexenc), speexenc->sinkpad);
+ gst_pad_set_chain_function (speexenc->sinkpad, gst_speexenc_chain);
+ gst_pad_set_connect_function (speexenc->sinkpad, gst_speexenc_sinkconnect);
+
+ speexenc->srcpad = gst_pad_new_from_template (speexenc_src_template, "src");
+ gst_element_add_pad (GST_ELEMENT (speexenc), speexenc->srcpad);
+
+ speex_bits_init(&speexenc->bits);
+ speexenc->mode = &speex_nb_mode;
+ speexenc->bufsize = 0;
+ speexenc->packet_count = 0;
+ speexenc->n_packets = 20;
+}
+
+static GstPadConnectReturn
+gst_speexenc_sinkconnect (GstPad *pad, GstCaps *caps)
+{
+ GstSpeexEnc *speexenc;
+
+ speexenc = GST_SPEEXENC (gst_pad_get_parent (pad));
+
+ if (!GST_CAPS_IS_FIXED (caps))
+ return GST_PAD_CONNECT_DELAYED;
+
+ gst_caps_get_int (caps, "rate", &speexenc->rate);
+ if (gst_pad_try_set_caps (speexenc->srcpad, GST_CAPS_NEW (
+ "speex_speex",
+ "audio/x-speex",
+ "rate", GST_PROPS_INT (speexenc->rate)
+ )))
+ {
+ speex_init_header(&speexenc->header, speexenc->rate, 1, speexenc->mode);
+ speexenc->header.frames_per_packet = speexenc->n_packets;
+
+ speexenc->state = speex_encoder_init(speexenc->mode);
+ speex_encoder_ctl(speexenc->state, SPEEX_GET_FRAME_SIZE, &speexenc->frame_size);
+
+ return GST_PAD_CONNECT_OK;
+ }
+ return GST_PAD_CONNECT_REFUSED;
+
+}
+
+static void
+gst_speexenc_chain (GstPad *pad, GstBuffer *buf)
+{
+ GstSpeexEnc *speexenc;
+ GstBuffer *outbuf;
+ gint16 *data;
+ guint8 *header_data;
+ gint size;
+ float input[1000];
+ gint frame_size;
+ gint i;
+
+ g_return_if_fail (pad != NULL);
+ g_return_if_fail (GST_IS_PAD (pad));
+ g_return_if_fail (buf != NULL);
+
+ speexenc = GST_SPEEXENC (GST_OBJECT_PARENT (pad));
+
+ if (!GST_PAD_CAPS (speexenc->srcpad)) {
+
+ if (!gst_pad_try_set_caps (speexenc->srcpad,
+ GST_CAPS_NEW (
+ "speex_enc",
+ "audio/x-speex",
+ "rate", GST_PROPS_INT (speexenc->rate)
+ )))
+ {
+ gst_element_error (GST_ELEMENT (speexenc), "could not negotiate");
+ return;
+ }
+ }
+
+ if (speexenc->packet_count == 0) {
+ header_data = speex_header_to_packet(&speexenc->header, &size);
+
+ outbuf = gst_buffer_new ();
+ GST_BUFFER_DATA (outbuf) = header_data;
+ GST_BUFFER_SIZE (outbuf) = size;
+
+ gst_pad_push (speexenc->srcpad, outbuf);
+ }
+
+ data = (gint16 *) GST_BUFFER_DATA (buf);
+ size = GST_BUFFER_SIZE (buf) / sizeof (gint16);
+
+ frame_size = speexenc->frame_size;
+
+ if (speexenc->bufsize && (speexenc->bufsize + size >= frame_size)) {
+ memcpy (speexenc->buffer + speexenc->bufsize, data, (frame_size - speexenc->bufsize) * sizeof (gint16));
+
+ for (i = 0; i < frame_size; i++)
+ input[i] = speexenc->buffer[i];
+
+ speex_encode (speexenc->state, input, &speexenc->bits);
+ speexenc->packet_count++;
+
+ if (speexenc->packet_count % speexenc->n_packets == 0) {
+ GstBuffer *outbuf;
+
+ outbuf = gst_buffer_new_and_alloc (frame_size * speexenc->n_packets);
+ GST_BUFFER_SIZE (outbuf) = speex_bits_write(&speexenc->bits,
+ GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
+ GST_BUFFER_TIMESTAMP (outbuf) = speexenc->next_ts;
+ speex_bits_reset(&speexenc->bits);
+
+ gst_pad_push (speexenc->srcpad, outbuf);
+ speexenc->next_ts += frame_size * GST_SECOND / speexenc->rate;
+ }
+
+ size -= (speexenc->frame_size - speexenc->bufsize);
+ data += (speexenc->frame_size - speexenc->bufsize);
+
+ speexenc->bufsize = 0;
+ }
+
+ while (size >= frame_size) {
+ for (i = 0; i < frame_size; i++)
+ input[i] = data[i];
+
+ speex_encode (speexenc->state, input, &speexenc->bits);
+ speexenc->packet_count++;
+
+ if (speexenc->packet_count % speexenc->n_packets == 0) {
+ GstBuffer *outbuf;
+
+ outbuf = gst_buffer_new_and_alloc (frame_size * speexenc->n_packets);
+ GST_BUFFER_SIZE (outbuf) = speex_bits_write(&speexenc->bits,
+ GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
+ GST_BUFFER_TIMESTAMP (outbuf) = speexenc->next_ts;
+ speex_bits_reset(&speexenc->bits);
+
+ gst_pad_push (speexenc->srcpad, outbuf);
+ speexenc->next_ts += frame_size * GST_SECOND / speexenc->rate;
+ }
+
+ size -= frame_size;
+ data += frame_size;
+ }
+
+ if (size) {
+ memcpy (speexenc->buffer + speexenc->bufsize, data, size * sizeof (gint16));
+ speexenc->bufsize += size;
+ }
+
+ gst_buffer_unref(buf);
+}
generated by cgit (git 2.34.1) at 2025-06-15 18:24:15 +0000