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+/* Copyright (c) 2012 Xiph.Org Foundation
+ Written by Jean-Marc Valin */
+/*
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ - Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ - Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+ OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#ifndef OPUS_PRIVATE_H
+#define OPUS_PRIVATE_H
+
+#include "arch.h"
+#include "opus.h"
+#include "celt.h"
+
+#include <stddef.h> /* offsetof */
+
+struct OpusRepacketizer {
+ unsigned char toc;
+ int nb_frames;
+ const unsigned char *frames[48];
+ opus_int16 len[48];
+ int framesize;
+};
+
+typedef struct ChannelLayout {
+ int nb_channels;
+ int nb_streams;
+ int nb_coupled_streams;
+ unsigned char mapping[256];
+} ChannelLayout;
+
+int validate_layout(const ChannelLayout *layout);
+int get_left_channel(const ChannelLayout *layout, int stream_id, int prev);
+int get_right_channel(const ChannelLayout *layout, int stream_id, int prev);
+int get_mono_channel(const ChannelLayout *layout, int stream_id, int prev);
+
+
+
+#define MODE_SILK_ONLY 1000
+#define MODE_HYBRID 1001
+#define MODE_CELT_ONLY 1002
+
+#define OPUS_SET_VOICE_RATIO_REQUEST 11018
+#define OPUS_GET_VOICE_RATIO_REQUEST 11019
+
+/** Configures the encoder's expected percentage of voice
+ * opposed to music or other signals.
+ *
+ * @note This interface is currently more aspiration than actuality. It's
+ * ultimately expected to bias an automatic signal classifier, but it currently
+ * just shifts the static bitrate to mode mapping around a little bit.
+ *
+ * @param[in] x <tt>int</tt>: Voice percentage in the range 0-100, inclusive.
+ * @hideinitializer */
+#define OPUS_SET_VOICE_RATIO(x) OPUS_SET_VOICE_RATIO_REQUEST, __opus_check_int(x)
+/** Gets the encoder's configured voice ratio value, @see OPUS_SET_VOICE_RATIO
+ *
+ * @param[out] x <tt>int*</tt>: Voice percentage in the range 0-100, inclusive.
+ * @hideinitializer */
+#define OPUS_GET_VOICE_RATIO(x) OPUS_GET_VOICE_RATIO_REQUEST, __opus_check_int_ptr(x)
+
+
+#define OPUS_SET_FORCE_MODE_REQUEST 11002
+#define OPUS_SET_FORCE_MODE(x) OPUS_SET_FORCE_MODE_REQUEST, __opus_check_int(x)
+
+typedef void (*downmix_func)(const void *, opus_val32 *, int, int, int, int, int);
+void downmix_float(const void *_x, opus_val32 *sub, int subframe, int offset, int c1, int c2, int C);
+void downmix_int(const void *_x, opus_val32 *sub, int subframe, int offset, int c1, int c2, int C);
+
+int encode_size(int size, unsigned char *data);
+
+opus_int32 frame_size_select(opus_int32 frame_size, int variable_duration, opus_int32 Fs);
+
+opus_int32 compute_frame_size(const void *analysis_pcm, int frame_size,
+ int variable_duration, int C, opus_int32 Fs, int bitrate_bps,
+ int delay_compensation, downmix_func downmix
+#ifndef DISABLE_FLOAT_API
+ , float *subframe_mem
+#endif
+ );
+
+opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_size,
+ unsigned char *data, opus_int32 out_data_bytes, int lsb_depth,
+ const void *analysis_pcm, opus_int32 analysis_size, int c1, int c2,
+ int analysis_channels, downmix_func downmix, int float_api);
+
+int opus_decode_native(OpusDecoder *st, const unsigned char *data, opus_int32 len,
+ opus_val16 *pcm, int frame_size, int decode_fec, int self_delimited,
+ opus_int32 *packet_offset, int soft_clip);
+
+/* Make sure everything is properly aligned. */
+static OPUS_INLINE int align(int i)
+{
+ struct foo {char c; union { void* p; opus_int32 i; opus_val32 v; } u;};
+
+ unsigned int alignment = offsetof(struct foo, u);
+
+ /* Optimizing compilers should optimize div and multiply into and
+ for all sensible alignment values. */
+ return ((i + alignment - 1) / alignment) * alignment;
+}
+
+int opus_packet_parse_impl(const unsigned char *data, opus_int32 len,
+ int self_delimited, unsigned char *out_toc,
+ const unsigned char *frames[48], opus_int16 size[48],
+ int *payload_offset, opus_int32 *packet_offset);
+
+opus_int32 opus_repacketizer_out_range_impl(OpusRepacketizer *rp, int begin, int end,
+ unsigned char *data, opus_int32 maxlen, int self_delimited, int pad);
+
+int pad_frame(unsigned char *data, opus_int32 len, opus_int32 new_len);
+
+#endif /* OPUS_PRIVATE_H */