From cbc5984df86796fa1e52958f7b0eb637a9ac88a2 Mon Sep 17 00:00:00 2001
From: jm <jm@0101bb08-14d6-0310-b084-bc0e0c8e3800>
Date: Sun, 14 Oct 2007 15:43:33 +0000
Subject: Manual update -- including Speex-specific jitter buffer

git-svn-id: http://svn.xiph.org/trunk/speex@13981 0101bb08-14d6-0310-b084-bc0e0c8e3800
---
 speexclient/speex_jitter_buffer.c | 85 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 speexclient/speex_jitter_buffer.c

(limited to 'speexclient')

diff --git a/speexclient/speex_jitter_buffer.c b/speexclient/speex_jitter_buffer.c
new file mode 100644
index 0000000..d79f34c
--- /dev/null
+++ b/speexclient/speex_jitter_buffer.c
@@ -0,0 +1,85 @@
+#include <speex/speex_jitter.h>
+
+
+void speex_jitter_init(SpeexJitter *jitter, void *decoder, int sampling_rate)
+{
+   jitter->dec = decoder;
+   speex_decoder_ctl(decoder, SPEEX_GET_FRAME_SIZE, &jitter->frame_size);
+
+   jitter->packets = jitter_buffer_init(jitter->frame_size);
+
+   speex_bits_init(&jitter->current_packet);
+   jitter->valid_bits = 0;
+
+}
+
+void speex_jitter_destroy(SpeexJitter *jitter)
+{
+   jitter_buffer_destroy(jitter->packets);
+   speex_bits_destroy(&jitter->current_packet);
+}
+
+void speex_jitter_put(SpeexJitter *jitter, char *packet, int len, int timestamp)
+{
+   JitterBufferPacket p;
+   p.data = packet;
+   p.len = len;
+   p.timestamp = timestamp;
+   p.span = jitter->frame_size;
+   jitter_buffer_put(jitter->packets, &p);
+}
+
+void speex_jitter_get(SpeexJitter *jitter, spx_int16_t *out, int *current_timestamp)
+{
+   int i;
+   int ret;
+   spx_int32_t activity;
+   char data[2048];
+   JitterBufferPacket packet;
+   packet.data = data;
+   
+   if (jitter->valid_bits)
+   {
+      /* Try decoding last received packet */
+      ret = speex_decode_int(jitter->dec, &jitter->current_packet, out);
+      if (ret == 0)
+      {
+         jitter_buffer_tick(jitter->packets);
+         return;
+      } else {
+         jitter->valid_bits = 0;
+      }
+   }
+
+   ret = jitter_buffer_get(jitter->packets, &packet, NULL);
+   
+   if (ret != JITTER_BUFFER_OK)
+   {
+      /* No packet found */
+
+      /*fprintf (stderr, "lost/late frame\n");*/
+      /*Packet is late or lost*/
+      speex_decode_int(jitter->dec, NULL, out);
+   } else {
+      speex_bits_read_from(&jitter->current_packet, packet.data, packet.len);
+      /* Decode packet */
+      ret = speex_decode_int(jitter->dec, &jitter->current_packet, out);
+      if (ret == 0)
+      {
+         jitter->valid_bits = 1;
+      } else {
+         /* Error while decoding */
+         for (i=0;i<jitter->frame_size;i++)
+            out[i]=0;
+      }
+   }
+   speex_decoder_ctl(jitter->dec, SPEEX_GET_ACTIVITY, &activity);
+   if (activity < 30)
+      jitter_buffer_update_delay(jitter->packets, &packet, NULL);
+   jitter_buffer_tick(jitter->packets);
+}
+
+int speex_jitter_get_pointer_timestamp(SpeexJitter *jitter)
+{
+   return jitter_buffer_get_pointer_timestamp(jitter->packets);
+}
-- 
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