Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

third_party/aom/aom/aomdx.h

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+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+/*!\defgroup aom_decoder AOMedia AOM/AV1 Decoder
+ * \ingroup aom
+ *
+ * @{
+ */
+/*!\file
+ * \brief Provides definitions for using AOM or AV1 within the aom Decoder
+ *        interface.
+ */
+#ifndef AOM_AOMDX_H_
+#define AOM_AOMDX_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Include controls common to both the encoder and decoder */
+#include "./aom.h"
+
+/*!\name Algorithm interface for AV1
+ *
+ * This interface provides the capability to decode AV1 streams.
+ * @{
+ */
+extern aom_codec_iface_t aom_codec_av1_dx_algo;
+extern aom_codec_iface_t *aom_codec_av1_dx(void);
+/*!@} - end algorithm interface member group*/
+
+/** Data structure that stores bit accounting for debug
+ */
+typedef struct Accounting Accounting;
+
+/** Callback that inspects decoder frame data.
+ */
+typedef void (*aom_inspect_cb)(void *decoder, void *ctx);
+
+/*!\brief Structure to hold inspection callback and context.
+ *
+ * Defines a structure to hold the inspection callback function and calling
+ * context.
+ */
+typedef struct aom_inspect_init {
+  /*! Inspection callback. */
+  aom_inspect_cb inspect_cb;
+
+  /*! Inspection context. */
+  void *inspect_ctx;
+} aom_inspect_init;
+
+/*!\enum aom_dec_control_id
+ * \brief AOM decoder control functions
+ *
+ * This set of macros define the control functions available for the AOM
+ * decoder interface.
+ *
+ * \sa #aom_codec_control
+ */
+enum aom_dec_control_id {
+  /** control function to get info on which reference frames were updated
+   *  by the last decode
+   */
+  AOMD_GET_LAST_REF_UPDATES = AOM_DECODER_CTRL_ID_START,
+
+  /** check if the indicated frame is corrupted */
+  AOMD_GET_FRAME_CORRUPTED,
+
+  /** control function to get info on which reference frames were used
+   *  by the last decode
+   */
+  AOMD_GET_LAST_REF_USED,
+
+  /** decryption function to decrypt encoded buffer data immediately
+   * before decoding. Takes a aom_decrypt_init, which contains
+   * a callback function and opaque context pointer.
+   */
+  AOMD_SET_DECRYPTOR,
+  // AOMD_SET_DECRYPTOR = AOMD_SET_DECRYPTOR,
+
+  /** control function to get the dimensions that the current frame is decoded
+   * at. This may be different to the intended display size for the frame as
+   * specified in the wrapper or frame header (see AV1D_GET_DISPLAY_SIZE). */
+  AV1D_GET_FRAME_SIZE,
+
+  /** control function to get the current frame's intended display dimensions
+   * (as specified in the wrapper or frame header). This may be different to
+   * the decoded dimensions of this frame (see AV1D_GET_FRAME_SIZE). */
+  AV1D_GET_DISPLAY_SIZE,
+
+  /** control function to get the bit depth of the stream. */
+  AV1D_GET_BIT_DEPTH,
+
+  /** control function to set the byte alignment of the planes in the reference
+   * buffers. Valid values are power of 2, from 32 to 1024. A value of 0 sets
+   * legacy alignment. I.e. Y plane is aligned to 32 bytes, U plane directly
+   * follows Y plane, and V plane directly follows U plane. Default value is 0.
+   */
+  AV1_SET_BYTE_ALIGNMENT,
+
+  /** control function to invert the decoding order to from right to left. The
+   * function is used in a test to confirm the decoding independence of tile
+   * columns. The function may be used in application where this order
+   * of decoding is desired.
+   *
+   * TODO(yaowu): Rework the unit test that uses this control, and in a future
+   *              release, this test-only control shall be removed.
+   */
+  AV1_INVERT_TILE_DECODE_ORDER,
+
+  /** control function to set the skip loop filter flag. Valid values are
+   * integers. The decoder will skip the loop filter when its value is set to
+   * nonzero. If the loop filter is skipped the decoder may accumulate decode
+   * artifacts. The default value is 0.
+   */
+  AV1_SET_SKIP_LOOP_FILTER,
+
+  /** control function to retrieve a pointer to the Accounting struct.  When
+   * compiled without --enable-accounting, this returns AOM_CODEC_INCAPABLE.
+   * If called before a frame has been decoded, this returns AOM_CODEC_ERROR.
+   * The caller should ensure that AOM_CODEC_OK is returned before attempting
+   * to dereference the Accounting pointer.
+   */
+  AV1_GET_ACCOUNTING,
+
+  /** control function to get last decoded frame quantizer. Returned value uses
+   * internal quantizer scale defined by the codec.
+   */
+  AOMD_GET_LAST_QUANTIZER,
+
+  /** control function to set the range of tile decoding. A value that is
+   * greater and equal to zero indicates only the specific row/column is
+   * decoded. A value that is -1 indicates the whole row/column is decoded.
+   * A special case is both values are -1 that means the whole frame is
+   * decoded.
+   */
+  AV1_SET_DECODE_TILE_ROW,
+  AV1_SET_DECODE_TILE_COL,
+
+  /** control function to set an aom_inspect_cb callback that is invoked each
+   * time a frame is decoded.  When compiled without --enable-inspection, this
+   * returns AOM_CODEC_INCAPABLE.
+   */
+  AV1_SET_INSPECTION_CALLBACK,
+
+  AOM_DECODER_CTRL_ID_MAX,
+};
+
+/** Decrypt n bytes of data from input -> output, using the decrypt_state
+ *  passed in AOMD_SET_DECRYPTOR.
+ */
+typedef void (*aom_decrypt_cb)(void *decrypt_state, const unsigned char *input,
+                               unsigned char *output, int count);
+
+/*!\brief Structure to hold decryption state
+ *
+ * Defines a structure to hold the decryption state and access function.
+ */
+typedef struct aom_decrypt_init {
+  /*! Decrypt callback. */
+  aom_decrypt_cb decrypt_cb;
+
+  /*! Decryption state. */
+  void *decrypt_state;
+} aom_decrypt_init;
+
+/*!\cond */
+/*!\brief AOM decoder control function parameter type
+ *
+ * Defines the data types that AOMD control functions take. Note that
+ * additional common controls are defined in aom.h
+ *
+ */
+
+AOM_CTRL_USE_TYPE(AOMD_GET_LAST_REF_UPDATES, int *)
+#define AOM_CTRL_AOMD_GET_LAST_REF_UPDATES
+AOM_CTRL_USE_TYPE(AOMD_GET_FRAME_CORRUPTED, int *)
+#define AOM_CTRL_AOMD_GET_FRAME_CORRUPTED
+AOM_CTRL_USE_TYPE(AOMD_GET_LAST_REF_USED, int *)
+#define AOM_CTRL_AOMD_GET_LAST_REF_USED
+AOM_CTRL_USE_TYPE(AOMD_GET_LAST_QUANTIZER, int *)
+#define AOM_CTRL_AOMD_GET_LAST_QUANTIZER
+AOM_CTRL_USE_TYPE(AOMD_SET_DECRYPTOR, aom_decrypt_init *)
+#define AOM_CTRL_AOMD_SET_DECRYPTOR
+// AOM_CTRL_USE_TYPE(AOMD_SET_DECRYPTOR, aom_decrypt_init *)
+//#define AOM_CTRL_AOMD_SET_DECRYPTOR
+AOM_CTRL_USE_TYPE(AV1D_GET_DISPLAY_SIZE, int *)
+#define AOM_CTRL_AV1D_GET_DISPLAY_SIZE
+AOM_CTRL_USE_TYPE(AV1D_GET_BIT_DEPTH, unsigned int *)
+#define AOM_CTRL_AV1D_GET_BIT_DEPTH
+AOM_CTRL_USE_TYPE(AV1D_GET_FRAME_SIZE, int *)
+#define AOM_CTRL_AV1D_GET_FRAME_SIZE
+AOM_CTRL_USE_TYPE(AV1_INVERT_TILE_DECODE_ORDER, int)
+#define AOM_CTRL_AV1_INVERT_TILE_DECODE_ORDER
+AOM_CTRL_USE_TYPE(AV1_GET_ACCOUNTING, Accounting **)
+#define AOM_CTRL_AV1_GET_ACCOUNTING
+AOM_CTRL_USE_TYPE(AV1_SET_DECODE_TILE_ROW, int)
+#define AOM_CTRL_AV1_SET_DECODE_TILE_ROW
+AOM_CTRL_USE_TYPE(AV1_SET_DECODE_TILE_COL, int)
+#define AOM_CTRL_AV1_SET_DECODE_TILE_COL
+AOM_CTRL_USE_TYPE(AV1_SET_INSPECTION_CALLBACK, aom_inspect_init *)
+#define AOM_CTRL_AV1_SET_INSPECTION_CALLBACK
+/*!\endcond */
+/*! @} - end defgroup aom_decoder */
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AOM_AOMDX_H_