Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 107 insertions, 0 deletions

diff --git a/plugins/codecs/opus_dec/opusdecode.c b/plugins/codecs/opus_dec/opusdecode.c
new file mode 100644
index 00000000..97398bb5
--- /dev/null
+++ b/plugins/codecs/opus_dec/opusdecode.c
@@ -0,0 +1,107 @@
+/* opusdecode.c
+ * opus 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 <stdlib.h>
+#include "opus/opus.h"
+
+#include "wsutil/codecs.h"
+#include "ws_attributes.h"
+
+void codec_register_opus(void);
+
+static void *
+codec_opus_init(codec_context_t *ctx _U_)
+{
+    OpusDecoder *state;
+    int err = OPUS_INTERNAL_ERROR;
+    /* Opus has in-band signaling and can convert what is sent to our
+     * desired output.
+     * always use maximum 48000 to cover all 8k/12k/16k/24k/48k
+     * always downmix to mono because RTP Player only supports mono now
+     */
+    state = opus_decoder_create(48000, 1, &err);
+    return state;
+}
+
+static void
+codec_opus_release(codec_context_t *ctx)
+{
+    OpusDecoder* state = (OpusDecoder*)ctx->priv;
+    if (!state) {
+      return; /* out-of-memory; */
+    }
+    opus_decoder_destroy(state);
+}
+
+static unsigned
+codec_opus_get_channels(codec_context_t *ctx _U_)
+{
+    return 1;
+}
+
+static unsigned
+codec_opus_get_frequency(codec_context_t *ctx _U_)
+{
+    /* although can set kinds of fs, but we set 48K now */
+    return 48000;
+}
+
+static size_t
+codec_opus_decode(codec_context_t *ctx,
+                  const void *input, size_t inputSizeBytes,
+                  void *output, size_t *outputSizeBytes)
+{
+    OpusDecoder *state = (OpusDecoder *)ctx->priv;
+
+    if (!state) {
+        return 0;  /* out-of-memory */
+    }
+
+    const unsigned char *data = (const unsigned char *)input;
+    opus_int32 len = (opus_int32)inputSizeBytes;
+    int frame_samples = opus_decoder_get_nb_samples(state, data, len);
+    if (frame_samples < 0) { // OPUS_INVALID_PACKET
+        return 0;
+    }
+
+    // reserve space for the first time
+    if (!output || !outputSizeBytes) {
+        return frame_samples*2;
+    }
+    opus_int16 *pcm = (opus_int16*)(output);
+    int ret = opus_decode(state, data, len, pcm, frame_samples, 0);
+
+    if (ret < 0) {
+        return 0;
+    }
+    *outputSizeBytes = ret * 2;
+    return *outputSizeBytes;
+}
+
+void
+codec_register_opus(void)
+{
+    register_codec("opus", codec_opus_init, codec_opus_release,
+                   codec_opus_get_channels, codec_opus_get_frequency, codec_opus_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:
+ */