Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 141 insertions, 0 deletions

diff --git a/plugins/codecs/iLBC/iLBCdecode.c b/plugins/codecs/iLBC/iLBCdecode.c
new file mode 100644
index 00000000..d127f160
--- /dev/null
+++ b/plugins/codecs/iLBC/iLBCdecode.c
@@ -0,0 +1,141 @@
+/* iLBCdecode.c
+ * iLBC codec
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+
+#include <glib.h>
+
+#include "ilbc.h"
+#include "wsutil/codecs.h"
+#include "ws_attributes.h"
+
+#define ILBC_20MS 20
+#define ILBC_30MS 30
+#define ILBC_PAYLOAD_LEN_20MS 38
+#define ILBC_PAYLOAD_LEN_30MS 50
+#define SAMPLE_SIZE 2
+
+typedef struct {
+#ifdef LIBILBC_VERSION_MAJOR
+    IlbcDecoderInstance *ilbc_ctx;  /* Real iLBC context */
+#else
+    iLBC_decinst_t *ilbc_ctx;  /* Real iLBC context */
+#endif
+    guint8 payload_len; /* Remember last payload_len */
+} ilbc_ctx_t;
+
+void codec_register_iLBC(void);
+
+static void *
+codec_iLBC_init(codec_context_t *ctx _U_)
+{
+    ilbc_ctx_t *priv;
+
+    priv=(ilbc_ctx_t *)g_malloc0(sizeof(*priv));
+    WebRtcIlbcfix_DecoderCreate(&(priv->ilbc_ctx));
+
+    return priv;
+}
+
+static void
+codec_iLBC_release(codec_context_t *ctx)
+{
+    WebRtcIlbcfix_DecoderFree(((ilbc_ctx_t *)ctx->priv)->ilbc_ctx);
+    g_free(ctx);
+}
+
+static unsigned
+codec_iLBC_get_channels(codec_context_t *ctx _U_)
+{
+    return 1;
+}
+
+static unsigned
+codec_iLBC_get_frequency(codec_context_t *ctx _U_)
+{
+    return 8000;
+}
+
+static size_t
+codec_iLBC_decode(codec_context_t *ctx,
+        const void *inputBytes, size_t inputBytesSize,
+        void *outputSamples, size_t *outputSamplesSize)
+{
+    int16_t speechType; // Not used in Wireshark code
+#ifdef LIBILBC_VERSION_MAJOR
+    int8_t *dataIn  = (int8_t *)inputBytes;
+#else
+    int16_t *dataIn  = (int16_t *)inputBytes;
+#endif
+    int16_t *dataOut = (int16_t *)outputSamples;
+    ilbc_ctx_t *dataCtx = (ilbc_ctx_t *)ctx->priv;
+    size_t outputSamplesCount;
+
+    if (!outputSamples || !outputSamplesSize)
+    {
+        if (0 == inputBytesSize%ILBC_PAYLOAD_LEN_20MS) {
+            /* 20ms packet size = 160 samples = 320 bytes */
+            return BLOCKL_20MS*SAMPLE_SIZE;
+        } else if (0 == inputBytesSize%ILBC_PAYLOAD_LEN_30MS) {
+            /* 30ms packet size = 240 samples = 480 bytes */
+            return BLOCKL_30MS*SAMPLE_SIZE;
+        } else {
+            /* unknown packet size */
+            return 0;
+        }
+    }
+
+    if (0 == inputBytesSize%ILBC_PAYLOAD_LEN_20MS) {
+        /* 20ms packet size */
+        if (dataCtx->payload_len != ILBC_20MS) {
+            WebRtcIlbcfix_DecoderInit(dataCtx->ilbc_ctx, ILBC_20MS);
+            dataCtx->payload_len = ILBC_20MS;
+        }
+        outputSamplesCount = WebRtcIlbcfix_Decode(dataCtx->ilbc_ctx, dataIn,
+                               (int16_t)inputBytesSize, dataOut, &speechType);
+    } else if (0 == inputBytesSize%ILBC_PAYLOAD_LEN_30MS) {
+        /* 30ms packet size */
+        if (dataCtx->payload_len != ILBC_30MS) {
+            WebRtcIlbcfix_DecoderInit(dataCtx->ilbc_ctx, ILBC_30MS);
+            dataCtx->payload_len = ILBC_30MS;
+        }
+        outputSamplesCount = WebRtcIlbcfix_Decode(dataCtx->ilbc_ctx, dataIn,
+                               (int16_t)inputBytesSize, dataOut, &speechType);
+    } else {
+        /* unknown packet size */
+        outputSamplesCount = 0;
+    }
+
+    /* WebRtcIlbcfix_Decode returns count of samples, but we return count of bytes */
+    *outputSamplesSize = outputSamplesCount*SAMPLE_SIZE;
+    return *outputSamplesSize;
+}
+
+void
+codec_register_iLBC(void)
+{
+    register_codec("iLBC", codec_iLBC_init, codec_iLBC_release,
+            codec_iLBC_get_channels, codec_iLBC_get_frequency, codec_iLBC_decode);
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */