1 files changed, 120 insertions, 2 deletions
diff --git a/media/libopus/include/opus.h b/media/libopus/include/opus.h
index 0c69c627d9..eadeda75a0 100644
--- a/media/libopus/include/opus.h
+++ b/media/libopus/include/opus.h
@@ -103,7 +103,7 @@ extern "C" {
   * @endcode
   *
   * where opus_encoder_get_size() returns the required size for the encoder state. Note that
-  * future versions of this code may change the size, so no assuptions should be made about it.
+  * future versions of this code may change the size, so no assumptions should be made about it.
   *
   * The encoder state is always continuous in memory and only a shallow copy is sufficient
   * to copy it (e.g. memcpy())
@@ -357,7 +357,7 @@ OPUS_EXPORT int opus_encoder_ctl(OpusEncoder *st, int request, ...) OPUS_ARG_NON
   * error = opus_decoder_init(dec, Fs, channels);
   * @endcode
   * where opus_decoder_get_size() returns the required size for the decoder state. Note that
-  * future versions of this code may change the size, so no assuptions should be made about it.
+  * future versions of this code may change the size, so no assumptions should be made about it.
   *
   * The decoder state is always continuous in memory and only a shallow copy is sufficient
   * to copy it (e.g. memcpy())
@@ -398,6 +398,21 @@ OPUS_EXPORT int opus_encoder_ctl(OpusEncoder *st, int request, ...) OPUS_ARG_NON
   */
 typedef struct OpusDecoder OpusDecoder;
 
+/** Opus DRED decoder.
+  * This contains the complete state of an Opus DRED decoder.
+  * It is position independent and can be freely copied.
+  * @see opus_dred_decoder_create,opus_dred_decoder_init
+  */
+typedef struct OpusDREDDecoder OpusDREDDecoder;
+
+
+/** Opus DRED state.
+  * This contains the complete state of an Opus DRED packet.
+  * It is position independent and can be freely copied.
+  * @see opus_dred_create,opus_dred_init
+  */
+typedef struct OpusDRED OpusDRED;
+
 /** Gets the size of an <code>OpusDecoder</code> structure.
   * @param [in] channels <tt>int</tt>: Number of channels.
   *                                    This must be 1 or 2.
@@ -511,6 +526,101 @@ OPUS_EXPORT int opus_decoder_ctl(OpusDecoder *st, int request, ...) OPUS_ARG_NON
   */
 OPUS_EXPORT void opus_decoder_destroy(OpusDecoder *st);
 
+/** Gets the size of an <code>OpusDREDDecoder</code> structure.
+  * @returns The size in bytes.
+  */
+OPUS_EXPORT int opus_dred_decoder_get_size(void);
+
+/** Allocates and initializes an OpusDREDDecoder state.
+  * @param [out] error <tt>int*</tt>: #OPUS_OK Success or @ref opus_errorcodes
+  */
+OPUS_EXPORT OpusDREDDecoder *opus_dred_decoder_create(int *error);
+
+/** Initializes an <code>OpusDREDDecoder</code> state.
+  * @param[in] dec <tt>OpusDREDDecoder*</tt>: State to be initialized.
+  */
+OPUS_EXPORT int opus_dred_decoder_init(OpusDREDDecoder *dec);
+
+/** Frees an <code>OpusDREDDecoder</code> allocated by opus_dred_decoder_create().
+  * @param[in] dec <tt>OpusDREDDecoder*</tt>: State to be freed.
+  */
+OPUS_EXPORT void opus_dred_decoder_destroy(OpusDREDDecoder *dec);
+
+/** Perform a CTL function on an Opus DRED decoder.
+  *
+  * Generally the request and subsequent arguments are generated
+  * by a convenience macro.
+  * @param dred_dec <tt>OpusDREDDecoder*</tt>: DRED Decoder state.
+  * @param request This and all remaining parameters should be replaced by one
+  *                of the convenience macros in @ref opus_genericctls or
+  *                @ref opus_decoderctls.
+  * @see opus_genericctls
+  * @see opus_decoderctls
+  */
+OPUS_EXPORT int opus_dred_decoder_ctl(OpusDREDDecoder *dred_dec, int request, ...);
+
+/** Gets the size of an <code>OpusDRED</code> structure.
+  * @returns The size in bytes.
+  */
+OPUS_EXPORT int opus_dred_get_size(void);
+
+/** Allocates and initializes a DRED state.
+  * @param [out] error <tt>int*</tt>: #OPUS_OK Success or @ref opus_errorcodes
+  */
+OPUS_EXPORT OpusDRED *opus_dred_alloc(int *error);
+
+/** Frees an <code>OpusDRED</code> allocated by opus_dred_create().
+  * @param[in] dec <tt>OpusDRED*</tt>: State to be freed.
+  */
+OPUS_EXPORT void opus_dred_free(OpusDRED *dec);
+
+/** Decode an Opus DRED packet.
+  * @param [in] dred_dec <tt>OpusDRED*</tt>: DRED Decoder state
+  * @param [in] dred <tt>OpusDRED*</tt>: DRED state
+  * @param [in] data <tt>char*</tt>: Input payload
+  * @param [in] len <tt>opus_int32</tt>: Number of bytes in payload
+  * @param [in] max_dred_samples <tt>opus_int32</tt>: Maximum number of DRED samples that may be needed (if available in the packet).
+  * @param [in] sampling_rate <tt>opus_int32</tt>: Sampling rate used for max_dred_samples argument. Needs not match the actual sampling rate of the decoder.
+  * @param [out] dred_end <tt>opus_int32*</tt>: Number of non-encoded (silence) samples between the DRED timestamp and the last DRED sample.
+  * @param [in] defer_processing <tt>int</tt>: Flag (0 or 1). If set to one, the CPU-intensive part of the DRED decoding is deferred until opus_dred_process() is called.
+  * @returns Offset (positive) of the first decoded DRED samples, zero if no DRED is present, or @ref opus_errorcodes
+  */
+OPUS_EXPORT int opus_dred_parse(OpusDREDDecoder *dred_dec, OpusDRED *dred, const unsigned char *data, opus_int32 len, opus_int32 max_dred_samples, opus_int32 sampling_rate, int *dred_end, int defer_processing) OPUS_ARG_NONNULL(1);
+
+/** Finish decoding an Opus DRED packet. The function only needs to be called if opus_dred_parse() was called with defer_processing=1.
+  * The source and destination will often be the same DRED state.
+  * @param [in] dred_dec <tt>OpusDRED*</tt>: DRED Decoder state
+  * @param [in] src <tt>OpusDRED*</tt>: Source DRED state to start the processing from.
+  * @param [out] dst <tt>OpusDRED*</tt>: Destination DRED state to store the updated state after processing.
+  * @returns @ref opus_errorcodes
+  */
+OPUS_EXPORT int opus_dred_process(OpusDREDDecoder *dred_dec, const OpusDRED *src, OpusDRED *dst);
+
+/** Decode audio from an Opus DRED packet with floating point output.
+  * @param [in] st <tt>OpusDecoder*</tt>: Decoder state
+  * @param [in] dred <tt>OpusDRED*</tt>: DRED state
+  * @param [in] dred_offset <tt>opus_int32</tt>: position of the redundancy to decode (in samples before the beginning of the real audio data in the packet).
+  * @param [out] pcm <tt>opus_int16*</tt>: Output signal (interleaved if 2 channels). length
+  *  is frame_size*channels*sizeof(opus_int16)
+  * @param [in] frame_size Number of samples per channel to decode in \a pcm.
+  *  frame_size <b>must</b> be a multiple of 2.5 ms.
+  * @returns Number of decoded samples or @ref opus_errorcodes
+  */
+OPUS_EXPORT int opus_decoder_dred_decode(OpusDecoder *st, const OpusDRED *dred, opus_int32 dred_offset, opus_int16 *pcm, opus_int32 frame_size);
+
+/** Decode audio from an Opus DRED packet with floating point output.
+  * @param [in] st <tt>OpusDecoder*</tt>: Decoder state
+  * @param [in] dred <tt>OpusDRED*</tt>: DRED state
+  * @param [in] dred_offset <tt>opus_int32</tt>: position of the redundancy to decode (in samples before the beginning of the real audio data in the packet).
+  * @param [out] pcm <tt>float*</tt>: Output signal (interleaved if 2 channels). length
+  *  is frame_size*channels*sizeof(float)
+  * @param [in] frame_size Number of samples per channel to decode in \a pcm.
+  *  frame_size <b>must</b> be a multiple of 2.5 ms.
+  * @returns Number of decoded samples or @ref opus_errorcodes
+  */
+OPUS_EXPORT int opus_decoder_dred_decode_float(OpusDecoder *st, const OpusDRED *dred, opus_int32 dred_offset, float *pcm, opus_int32 frame_size);
+
+
 /** Parse an opus packet into one or more frames.
   * Opus_decode will perform this operation internally so most applications do
   * not need to use this function.
@@ -583,6 +693,14 @@ OPUS_EXPORT OPUS_WARN_UNUSED_RESULT int opus_packet_get_nb_frames(const unsigned
   */
 OPUS_EXPORT OPUS_WARN_UNUSED_RESULT int opus_packet_get_nb_samples(const unsigned char packet[], opus_int32 len, opus_int32 Fs) OPUS_ARG_NONNULL(1);
 
+/** Checks whether an Opus packet has LBRR.
+  * @param [in] packet <tt>char*</tt>: Opus packet
+  * @param [in] len <tt>opus_int32</tt>: Length of packet
+  * @returns 1 is LBRR is present, 0 otherwise
+  * @retval OPUS_INVALID_PACKET The compressed data passed is corrupted or of an unsupported type
+  */
+OPUS_EXPORT OPUS_WARN_UNUSED_RESULT int opus_packet_has_lbrr(const unsigned char packet[], opus_int32 len);
+
 /** Gets the number of samples of an Opus packet.
   * @param [in] dec <tt>OpusDecoder*</tt>: Decoder state
   * @param [in] packet <tt>char*</tt>: Opus packet