/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree.
*/
/*!\defgroup vp8_decoder WebM VP8/VP9 Decoder * \ingroup vp8 * * @{
*/ /*!\file * \brief Provides definitions for using VP8 or VP9 within the vpx Decoder * interface.
*/ #ifndef VPX_VPX_VP8DX_H_ #define VPX_VPX_VP8DX_H_
#ifdef __cplusplus extern"C" { #endif
/* Include controls common to both the encoder and decoder */ #include"./vp8.h"
/*!\name Algorithm interface for VP8 * * This interface provides the capability to decode VP8 streams. * @{
*/
/*!\brief A single instance of the VP8 decoder. *\deprecated This access mechanism is provided for backwards compatibility; * prefer vpx_codec_vp8_dx().
*/ extern vpx_codec_iface_t vpx_codec_vp8_dx_algo;
/*!\brief The interface to the VP8 decoder.
*/ extern vpx_codec_iface_t *vpx_codec_vp8_dx(void); /*!@} - end algorithm interface member group*/
/*!\name Algorithm interface for VP9 * * This interface provides the capability to decode VP9 streams. * @{
*/
/*!\brief A single instance of the VP9 decoder. *\deprecated This access mechanism is provided for backwards compatibility; * prefer vpx_codec_vp9_dx().
*/ extern vpx_codec_iface_t vpx_codec_vp9_dx_algo;
/*!\brief The interface to the VP9 decoder.
*/ extern vpx_codec_iface_t *vpx_codec_vp9_dx(void); /*!@} - end algorithm interface member group*/
/*!\enum vp8_dec_control_id * \brief VP8 decoder control functions * * This set of macros define the control functions available for the VP8 * decoder interface. * * \sa #vpx_codec_control
*/ enum vp8_dec_control_id { /** control function to get info on which reference frames were updated * by the last decode
*/
VP8D_GET_LAST_REF_UPDATES = VP8_DECODER_CTRL_ID_START,
/** check if the indicated frame is corrupted */
VP8D_GET_FRAME_CORRUPTED,
/** control function to get info on which reference frames were used * by the last decode
*/
VP8D_GET_LAST_REF_USED,
/** decryption function to decrypt encoded buffer data immediately * before decoding. Takes a vpx_decrypt_init, which contains * a callback function and opaque context pointer.
*/
VPXD_SET_DECRYPTOR,
VP8D_SET_DECRYPTOR = VPXD_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 VP9D_GET_DISPLAY_SIZE). */
VP9D_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 VP9D_GET_FRAME_SIZE). */
VP9D_GET_DISPLAY_SIZE,
/** control function to get the bit depth of the stream. */
VP9D_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.
*/
VP9_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.
*/
VP9_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.
*/
VP9_SET_SKIP_LOOP_FILTER,
/** control function to decode SVC stream up to the x spatial layers, * where x is passed in through the control, and is 0 for base layer.
*/
VP9_DECODE_SVC_SPATIAL_LAYER,
/*!\brief Codec control function to get last decoded frame quantizer. * * Return value uses internal quantizer scale defined by the codec. * * Supported in codecs: VP8, VP9
*/
VPXD_GET_LAST_QUANTIZER,
/*!\brief Codec control function to set row level multi-threading. * * 0 : off, 1 : on * * Supported in codecs: VP9
*/
VP9D_SET_ROW_MT,
/*!\brief Codec control function to set loopfilter optimization. * * 0 : off, Loop filter is done after all tiles have been decoded * 1 : on, Loop filter is done immediately after decode without * waiting for all threads to sync. * * Supported in codecs: VP9
*/
VP9D_SET_LOOP_FILTER_OPT,
VP8_DECODER_CTRL_ID_MAX
};
/** Decrypt n bytes of data from input -> output, using the decrypt_state * passed in VPXD_SET_DECRYPTOR.
*/ typedefvoid (*vpx_decrypt_cb)(void *decrypt_state, constunsignedchar *input, unsignedchar *output, int count);
/*!\brief Structure to hold decryption state * * Defines a structure to hold the decryption state and access function.
*/ typedefstruct vpx_decrypt_init { /*! Decrypt callback. */
vpx_decrypt_cb decrypt_cb;
/*!\cond */ /*!\brief VP8 decoder control function parameter type * * Defines the data types that VP8D control functions take. Note that * additional common controls are defined in vp8.h *
*/
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