1128 lines
38 KiB
C
1128 lines
38 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AOM_AOM_AOM_ENCODER_H_
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#define AOM_AOM_AOM_ENCODER_H_
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/*!\defgroup encoder Encoder Algorithm Interface
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* \ingroup codec
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* This abstraction allows applications using this encoder to easily support
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* multiple video formats with minimal code duplication. This section describes
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* the interface common to all encoders.
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* @{
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*/
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/*!\file
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* \brief Describes the encoder algorithm interface to applications.
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*
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* This file describes the interface between an application and a
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* video encoder algorithm.
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*
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "aom/aom_codec.h"
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/*!\brief Current ABI version number
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*
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* \internal
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* If this file is altered in any way that changes the ABI, this value
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* must be bumped. Examples include, but are not limited to, changing
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* types, removing or reassigning enums, adding/removing/rearranging
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* fields to structures
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*/
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#define AOM_ENCODER_ABI_VERSION \
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(8 + AOM_CODEC_ABI_VERSION) /**<\hideinitializer*/
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/*! \brief Encoder capabilities bitfield
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*
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* Each encoder advertises the capabilities it supports as part of its
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* ::aom_codec_iface_t interface structure. Capabilities are extra
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* interfaces or functionality, and are not required to be supported
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* by an encoder.
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*
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* The available flags are specified by AOM_CODEC_CAP_* defines.
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*/
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#define AOM_CODEC_CAP_PSNR 0x10000 /**< Can issue PSNR packets */
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/*! Can support input images at greater than 8 bitdepth.
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*/
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#define AOM_CODEC_CAP_HIGHBITDEPTH 0x40000
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/*! \brief Initialization-time Feature Enabling
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*
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* Certain codec features must be known at initialization time, to allow
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* for proper memory allocation.
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*
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* The available flags are specified by AOM_CODEC_USE_* defines.
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*/
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#define AOM_CODEC_USE_PSNR 0x10000 /**< Calculate PSNR on each frame */
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/*!\brief Make the encoder output one partition at a time. */
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#define AOM_CODEC_USE_HIGHBITDEPTH 0x40000 /**< Use high bitdepth */
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/*!\brief Generic fixed size buffer structure
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*
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* This structure is able to hold a reference to any fixed size buffer.
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*/
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typedef struct aom_fixed_buf {
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void *buf; /**< Pointer to the data. Does NOT own the data! */
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size_t sz; /**< Length of the buffer, in chars */
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} aom_fixed_buf_t; /**< alias for struct aom_fixed_buf */
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/*!\brief Error Resilient flags
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*
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* These flags define which error resilient features to enable in the
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* encoder. The flags are specified through the
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* aom_codec_enc_cfg::g_error_resilient variable.
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*/
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typedef uint32_t aom_codec_er_flags_t;
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/*!\brief Improve resiliency against losses of whole frames */
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#define AOM_ERROR_RESILIENT_DEFAULT 0x1
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/*!\brief Encoder output packet variants
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*
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* This enumeration lists the different kinds of data packets that can be
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* returned by calls to aom_codec_get_cx_data(). Algorithms \ref MAY
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* extend this list to provide additional functionality.
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*/
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enum aom_codec_cx_pkt_kind {
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AOM_CODEC_CX_FRAME_PKT, /**< Compressed video frame */
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AOM_CODEC_STATS_PKT, /**< Two-pass statistics for this frame */
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AOM_CODEC_FPMB_STATS_PKT, /**< first pass mb statistics for this frame */
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AOM_CODEC_PSNR_PKT, /**< PSNR statistics for this frame */
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AOM_CODEC_CUSTOM_PKT = 256 /**< Algorithm extensions */
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};
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/*!\brief Encoder output packet
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*
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* This structure contains the different kinds of output data the encoder
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* may produce while compressing a frame.
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*/
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typedef struct aom_codec_cx_pkt {
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enum aom_codec_cx_pkt_kind kind; /**< packet variant */
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union {
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struct {
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void *buf; /**< compressed data buffer */
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size_t sz; /**< length of compressed data */
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/*!\brief time stamp to show frame (in timebase units) */
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aom_codec_pts_t pts;
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/*!\brief duration to show frame (in timebase units) */
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unsigned long duration;
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aom_codec_frame_flags_t flags; /**< flags for this frame */
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/*!\brief the partition id defines the decoding order of the partitions.
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* Only applicable when "output partition" mode is enabled. First
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* partition has id 0.*/
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int partition_id;
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/*!\brief size of the visible frame in this packet */
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size_t vis_frame_size;
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} frame; /**< data for compressed frame packet */
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aom_fixed_buf_t twopass_stats; /**< data for two-pass packet */
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aom_fixed_buf_t firstpass_mb_stats; /**< first pass mb packet */
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struct aom_psnr_pkt {
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unsigned int samples[4]; /**< Number of samples, total/y/u/v */
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uint64_t sse[4]; /**< sum squared error, total/y/u/v */
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double psnr[4]; /**< PSNR, total/y/u/v */
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} psnr; /**< data for PSNR packet */
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aom_fixed_buf_t raw; /**< data for arbitrary packets */
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/* This packet size is fixed to allow codecs to extend this
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* interface without having to manage storage for raw packets,
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* i.e., if it's smaller than 128 bytes, you can store in the
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* packet list directly.
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*/
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char pad[128 - sizeof(enum aom_codec_cx_pkt_kind)]; /**< fixed sz */
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} data; /**< packet data */
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} aom_codec_cx_pkt_t; /**< alias for struct aom_codec_cx_pkt */
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/*!\brief Rational Number
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*
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* This structure holds a fractional value.
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*/
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typedef struct aom_rational {
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int num; /**< fraction numerator */
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int den; /**< fraction denominator */
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} aom_rational_t; /**< alias for struct aom_rational */
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/*!\brief Multi-pass Encoding Pass */
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enum aom_enc_pass {
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AOM_RC_ONE_PASS, /**< Single pass mode */
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AOM_RC_FIRST_PASS, /**< First pass of multi-pass mode */
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AOM_RC_LAST_PASS /**< Final pass of multi-pass mode */
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};
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/*!\brief Rate control mode */
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enum aom_rc_mode {
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AOM_VBR, /**< Variable Bit Rate (VBR) mode */
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AOM_CBR, /**< Constant Bit Rate (CBR) mode */
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AOM_CQ, /**< Constrained Quality (CQ) mode */
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AOM_Q, /**< Constant Quality (Q) mode */
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};
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/*!\brief Keyframe placement mode.
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*
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* This enumeration determines whether keyframes are placed automatically by
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* the encoder or whether this behavior is disabled. Older releases of this
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* SDK were implemented such that AOM_KF_FIXED meant keyframes were disabled.
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* This name is confusing for this behavior, so the new symbols to be used
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* are AOM_KF_AUTO and AOM_KF_DISABLED.
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*/
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enum aom_kf_mode {
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AOM_KF_FIXED, /**< deprecated, implies AOM_KF_DISABLED */
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AOM_KF_AUTO, /**< Encoder determines optimal placement automatically */
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AOM_KF_DISABLED = 0 /**< Encoder does not place keyframes. */
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};
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/*!\brief Frame super-resolution mode. */
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typedef enum {
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/**< Frame super-resolution is disabled for all frames. */
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AOM_SUPERRES_NONE,
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/**< All frames are coded at the specified scale and super-resolved. */
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AOM_SUPERRES_FIXED,
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/**< All frames are coded at a random scale and super-resolved. */
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AOM_SUPERRES_RANDOM,
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/**< Super-resolution scale for each frame is determined based on the q index
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of that frame. */
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AOM_SUPERRES_QTHRESH,
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/**< Full-resolution or super-resolution and the scale (in case of
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super-resolution) are automatically selected for each frame. */
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AOM_SUPERRES_AUTO,
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} aom_superres_mode;
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/*!\brief Encoder Config Options
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*
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* This type allows to enumerate and control flags defined for encoder control
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* via config file at runtime.
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*/
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typedef struct cfg_options {
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/*!\brief Indicate init by cfg file
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* 0 or 1
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*/
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unsigned int init_by_cfg_file;
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/*!\brief Superblock size
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* 0, 64 or 128
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*/
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unsigned int super_block_size;
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/*!\brief max partition size
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* 8, 16, 32, 64, 128
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*/
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unsigned int max_partition_size;
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/*!\brief min partition size
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* 8, 16, 32, 64, 128
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*/
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unsigned int min_partition_size;
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/*!\brief disable AB Shape partition type
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*
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*/
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unsigned int disable_ab_partition_type;
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/*!\brief disable rectangular partition type
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*
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*/
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unsigned int disable_rect_partition_type;
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/*!\brief disable 1:4/4:1 partition type
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*
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*/
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unsigned int disable_1to4_partition_type;
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/*!\brief disable flip and identity transform type
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*
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*/
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unsigned int disable_flip_idtx;
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/*!\brief disable CDEF filter
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*
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*/
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unsigned int disable_cdef;
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/*!\brief disable Loop Restoration Filter
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*
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*/
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unsigned int disable_lr;
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/*!\brief disable OBMC
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*
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*/
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unsigned int disable_obmc;
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/*!\brief disable Warped Motion
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*
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*/
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unsigned int disable_warp_motion;
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/*!\brief disable global motion
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*
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*/
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unsigned int disable_global_motion;
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/*!\brief disable dist weighted compound
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*
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*/
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unsigned int disable_dist_wtd_comp;
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/*!\brief disable diff weighted compound
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*
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*/
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unsigned int disable_diff_wtd_comp;
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/*!\brief disable inter/intra compound
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*
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*/
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unsigned int disable_inter_intra_comp;
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/*!\brief disable masked compound
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*
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*/
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unsigned int disable_masked_comp;
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/*!\brief disable one sided compound
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*
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*/
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unsigned int disable_one_sided_comp;
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/*!\brief disable Palette
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*
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*/
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unsigned int disable_palette;
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/*!\brief disable Intra Block Copy
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*
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*/
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unsigned int disable_intrabc;
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/*!\brief disable chroma from luma
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*
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*/
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unsigned int disable_cfl;
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/*!\brief disable intra smooth mode
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*
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*/
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unsigned int disable_smooth_intra;
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/*!\brief disable filter intra
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*
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*/
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unsigned int disable_filter_intra;
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/*!\brief disable dual filter
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*
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*/
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unsigned int disable_dual_filter;
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/*!\brief disable intra angle delta
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*
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*/
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unsigned int disable_intra_angle_delta;
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/*!\brief disable intra edge filter
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*
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*/
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unsigned int disable_intra_edge_filter;
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/*!\brief disable 64x64 transform
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*
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*/
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unsigned int disable_tx_64x64;
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/*!\brief disable smooth inter/intra
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*
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*/
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unsigned int disable_smooth_inter_intra;
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/*!\brief disable inter/inter wedge comp
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*
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*/
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unsigned int disable_inter_inter_wedge;
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/*!\brief disable inter/intra wedge comp
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*
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*/
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unsigned int disable_inter_intra_wedge;
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/*!\brief disable paeth intra
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*
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*/
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unsigned int disable_paeth_intra;
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/*!\brief disable trellis quantization
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*
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*/
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unsigned int disable_trellis_quant;
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/*!\brief disable ref frame MV
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*
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*/
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unsigned int disable_ref_frame_mv;
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/*!\brief use reduced reference frame set
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*
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*/
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unsigned int reduced_reference_set;
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/*!\brief use reduced transform type set
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*
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*/
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unsigned int reduced_tx_type_set;
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} cfg_options_t;
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/*!\brief Encoded Frame Flags
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*
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* This type indicates a bitfield to be passed to aom_codec_encode(), defining
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* per-frame boolean values. By convention, bits common to all codecs will be
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* named AOM_EFLAG_*, and bits specific to an algorithm will be named
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* /algo/_eflag_*. The lower order 16 bits are reserved for common use.
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*/
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typedef long aom_enc_frame_flags_t;
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/*!\brief Force this frame to be a keyframe */
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#define AOM_EFLAG_FORCE_KF (1 << 0)
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/*!\brief Encoder configuration structure
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*
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* This structure contains the encoder settings that have common representations
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* across all codecs. This doesn't imply that all codecs support all features,
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* however.
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*/
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typedef struct aom_codec_enc_cfg {
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/*
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* generic settings (g)
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*/
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/*!\brief Algorithm specific "usage" value
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*
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* Algorithms may define multiple values for usage, which may convey the
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* intent of how the application intends to use the stream. If this value
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* is non-zero, consult the documentation for the codec to determine its
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* meaning.
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*/
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unsigned int g_usage;
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/*!\brief Maximum number of threads to use
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*
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* For multi-threaded implementations, use no more than this number of
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* threads. The codec may use fewer threads than allowed. The value
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* 0 is equivalent to the value 1.
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*/
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unsigned int g_threads;
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/*!\brief Bitstream profile to use
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*
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* Some codecs support a notion of multiple bitstream profiles. Typically
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* this maps to a set of features that are turned on or off. Often the
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* profile to use is determined by the features of the intended decoder.
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* Consult the documentation for the codec to determine the valid values
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* for this parameter, or set to zero for a sane default.
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*/
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unsigned int g_profile; /**< profile of bitstream to use */
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/*!\brief Width of the frame
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*
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* This value identifies the presentation resolution of the frame,
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* in pixels. Note that the frames passed as input to the encoder must
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* have this resolution. Frames will be presented by the decoder in this
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* resolution, independent of any spatial resampling the encoder may do.
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*/
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unsigned int g_w;
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/*!\brief Height of the frame
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*
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* This value identifies the presentation resolution of the frame,
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* in pixels. Note that the frames passed as input to the encoder must
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* have this resolution. Frames will be presented by the decoder in this
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* resolution, independent of any spatial resampling the encoder may do.
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*/
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unsigned int g_h;
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/*!\brief Max number of frames to encode
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*
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*/
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unsigned int g_limit;
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/*!\brief Forced maximum width of the frame
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*
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* If this value is non-zero then it is used to force the maximum frame
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* width written in write_sequence_header().
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*/
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unsigned int g_forced_max_frame_width;
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/*!\brief Forced maximum height of the frame
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*
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* If this value is non-zero then it is used to force the maximum frame
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* height written in write_sequence_header().
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*/
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unsigned int g_forced_max_frame_height;
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/*!\brief Bit-depth of the codec
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*
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* This value identifies the bit_depth of the codec,
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* Only certain bit-depths are supported as identified in the
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* aom_bit_depth_t enum.
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*/
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aom_bit_depth_t g_bit_depth;
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/*!\brief Bit-depth of the input frames
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*
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* This value identifies the bit_depth of the input frames in bits.
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* Note that the frames passed as input to the encoder must have
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* this bit-depth.
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*/
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unsigned int g_input_bit_depth;
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/*!\brief Stream timebase units
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*
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* Indicates the smallest interval of time, in seconds, used by the stream.
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* For fixed frame rate material, or variable frame rate material where
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* frames are timed at a multiple of a given clock (ex: video capture),
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* the \ref RECOMMENDED method is to set the timebase to the reciprocal
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* of the frame rate (ex: 1001/30000 for 29.970 Hz NTSC). This allows the
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* pts to correspond to the frame number, which can be handy. For
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* re-encoding video from containers with absolute time timestamps, the
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* \ref RECOMMENDED method is to set the timebase to that of the parent
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* container or multimedia framework (ex: 1/1000 for ms, as in FLV).
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*/
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struct aom_rational g_timebase;
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/*!\brief Enable error resilient modes.
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*
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* The error resilient bitfield indicates to the encoder which features
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* it should enable to take measures for streaming over lossy or noisy
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* links.
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*/
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aom_codec_er_flags_t g_error_resilient;
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/*!\brief Multi-pass Encoding Mode
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*
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* This value should be set to the current phase for multi-pass encoding.
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* For single pass, set to #AOM_RC_ONE_PASS.
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*/
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enum aom_enc_pass g_pass;
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/*!\brief Allow lagged encoding
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*
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* If set, this value allows the encoder to consume a number of input
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* frames before producing output frames. This allows the encoder to
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* base decisions for the current frame on future frames. This does
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* increase the latency of the encoding pipeline, so it is not appropriate
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* in all situations (ex: realtime encoding).
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*
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* Note that this is a maximum value -- the encoder may produce frames
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* sooner than the given limit. Set this value to 0 to disable this
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* feature.
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*/
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unsigned int g_lag_in_frames;
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|
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/*
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* rate control settings (rc)
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*/
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/*!\brief Temporal resampling configuration, if supported by the codec.
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*
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* Temporal resampling allows the codec to "drop" frames as a strategy to
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* meet its target data rate. This can cause temporal discontinuities in
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* the encoded video, which may appear as stuttering during playback. This
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* trade-off is often acceptable, but for many applications is not. It can
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* be disabled in these cases.
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*
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* Note that not all codecs support this feature. All aom AVx codecs do.
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* For other codecs, consult the documentation for that algorithm.
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*
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* This threshold is described as a percentage of the target data buffer.
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* When the data buffer falls below this percentage of fullness, a
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* dropped frame is indicated. Set the threshold to zero (0) to disable
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* this feature.
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*/
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unsigned int rc_dropframe_thresh;
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|
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/*!\brief Mode for spatial resampling, if supported by the codec.
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*
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* Spatial resampling allows the codec to compress a lower resolution
|
|
* version of the frame, which is then upscaled by the decoder to the
|
|
* correct presentation resolution. This increases visual quality at
|
|
* low data rates, at the expense of CPU time on the encoder/decoder.
|
|
*/
|
|
unsigned int rc_resize_mode;
|
|
|
|
/*!\brief Frame resize denominator.
|
|
*
|
|
* The denominator for resize to use, assuming 8 as the numerator.
|
|
*
|
|
* Valid denominators are 8 - 16 for now.
|
|
*/
|
|
unsigned int rc_resize_denominator;
|
|
|
|
/*!\brief Keyframe resize denominator.
|
|
*
|
|
* The denominator for resize to use, assuming 8 as the numerator.
|
|
*
|
|
* Valid denominators are 8 - 16 for now.
|
|
*/
|
|
unsigned int rc_resize_kf_denominator;
|
|
|
|
/*!\brief Frame super-resolution scaling mode.
|
|
*
|
|
* Similar to spatial resampling, frame super-resolution integrates
|
|
* upscaling after the encode/decode process. Taking control of upscaling and
|
|
* using restoration filters should allow it to outperform normal resizing.
|
|
*/
|
|
aom_superres_mode rc_superres_mode;
|
|
|
|
/*!\brief Frame super-resolution denominator.
|
|
*
|
|
* The denominator for superres to use. If fixed it will only change if the
|
|
* cumulative scale change over resizing and superres is greater than 1/2;
|
|
* this forces superres to reduce scaling.
|
|
*
|
|
* Valid denominators are 8 to 16.
|
|
*
|
|
* Used only by AOM_SUPERRES_FIXED.
|
|
*/
|
|
unsigned int rc_superres_denominator;
|
|
|
|
/*!\brief Keyframe super-resolution denominator.
|
|
*
|
|
* The denominator for superres to use. If fixed it will only change if the
|
|
* cumulative scale change over resizing and superres is greater than 1/2;
|
|
* this forces superres to reduce scaling.
|
|
*
|
|
* Valid denominators are 8 - 16 for now.
|
|
*/
|
|
unsigned int rc_superres_kf_denominator;
|
|
|
|
/*!\brief Frame super-resolution q threshold.
|
|
*
|
|
* The q level threshold after which superres is used.
|
|
* Valid values are 1 to 63.
|
|
*
|
|
* Used only by AOM_SUPERRES_QTHRESH
|
|
*/
|
|
unsigned int rc_superres_qthresh;
|
|
|
|
/*!\brief Keyframe super-resolution q threshold.
|
|
*
|
|
* The q level threshold after which superres is used for key frames.
|
|
* Valid values are 1 to 63.
|
|
*
|
|
* Used only by AOM_SUPERRES_QTHRESH
|
|
*/
|
|
unsigned int rc_superres_kf_qthresh;
|
|
|
|
/*!\brief Rate control algorithm to use.
|
|
*
|
|
* Indicates whether the end usage of this stream is to be streamed over
|
|
* a bandwidth constrained link, indicating that Constant Bit Rate (CBR)
|
|
* mode should be used, or whether it will be played back on a high
|
|
* bandwidth link, as from a local disk, where higher variations in
|
|
* bitrate are acceptable.
|
|
*/
|
|
enum aom_rc_mode rc_end_usage;
|
|
|
|
/*!\brief Two-pass stats buffer.
|
|
*
|
|
* A buffer containing all of the stats packets produced in the first
|
|
* pass, concatenated.
|
|
*/
|
|
aom_fixed_buf_t rc_twopass_stats_in;
|
|
|
|
/*!\brief first pass mb stats buffer.
|
|
*
|
|
* A buffer containing all of the first pass mb stats packets produced
|
|
* in the first pass, concatenated.
|
|
*/
|
|
aom_fixed_buf_t rc_firstpass_mb_stats_in;
|
|
|
|
/*!\brief Target data rate
|
|
*
|
|
* Target bandwidth to use for this stream, in kilobits per second.
|
|
*/
|
|
unsigned int rc_target_bitrate;
|
|
|
|
/*
|
|
* quantizer settings
|
|
*/
|
|
|
|
/*!\brief Minimum (Best Quality) Quantizer
|
|
*
|
|
* The quantizer is the most direct control over the quality of the
|
|
* encoded image. The range of valid values for the quantizer is codec
|
|
* specific. Consult the documentation for the codec to determine the
|
|
* values to use. To determine the range programmatically, call
|
|
* aom_codec_enc_config_default() with a usage value of 0.
|
|
*/
|
|
unsigned int rc_min_quantizer;
|
|
|
|
/*!\brief Maximum (Worst Quality) Quantizer
|
|
*
|
|
* The quantizer is the most direct control over the quality of the
|
|
* encoded image. The range of valid values for the quantizer is codec
|
|
* specific. Consult the documentation for the codec to determine the
|
|
* values to use. To determine the range programmatically, call
|
|
* aom_codec_enc_config_default() with a usage value of 0.
|
|
*/
|
|
unsigned int rc_max_quantizer;
|
|
|
|
/*
|
|
* bitrate tolerance
|
|
*/
|
|
|
|
/*!\brief Rate control adaptation undershoot control
|
|
*
|
|
* This value, controls the tolerance of the VBR algorithm to undershoot
|
|
* and is used as a trigger threshold for more agressive adaptation of Q.
|
|
*
|
|
* Valid values in the range 0-100.
|
|
*/
|
|
unsigned int rc_undershoot_pct;
|
|
|
|
/*!\brief Rate control adaptation overshoot control
|
|
*
|
|
* This value, controls the tolerance of the VBR algorithm to overshoot
|
|
* and is used as a trigger threshold for more agressive adaptation of Q.
|
|
*
|
|
* Valid values in the range 0-1000.
|
|
*/
|
|
unsigned int rc_overshoot_pct;
|
|
|
|
/*
|
|
* decoder buffer model parameters
|
|
*/
|
|
|
|
/*!\brief Decoder Buffer Size
|
|
*
|
|
* This value indicates the amount of data that may be buffered by the
|
|
* decoding application. Note that this value is expressed in units of
|
|
* time (milliseconds). For example, a value of 5000 indicates that the
|
|
* client will buffer (at least) 5000ms worth of encoded data. Use the
|
|
* target bitrate (#rc_target_bitrate) to convert to bits/bytes, if
|
|
* necessary.
|
|
*/
|
|
unsigned int rc_buf_sz;
|
|
|
|
/*!\brief Decoder Buffer Initial Size
|
|
*
|
|
* This value indicates the amount of data that will be buffered by the
|
|
* decoding application prior to beginning playback. This value is
|
|
* expressed in units of time (milliseconds). Use the target bitrate
|
|
* (#rc_target_bitrate) to convert to bits/bytes, if necessary.
|
|
*/
|
|
unsigned int rc_buf_initial_sz;
|
|
|
|
/*!\brief Decoder Buffer Optimal Size
|
|
*
|
|
* This value indicates the amount of data that the encoder should try
|
|
* to maintain in the decoder's buffer. This value is expressed in units
|
|
* of time (milliseconds). Use the target bitrate (#rc_target_bitrate)
|
|
* to convert to bits/bytes, if necessary.
|
|
*/
|
|
unsigned int rc_buf_optimal_sz;
|
|
|
|
/*
|
|
* 2 pass rate control parameters
|
|
*/
|
|
|
|
/*!\brief Two-pass mode CBR/VBR bias
|
|
*
|
|
* Bias, expressed on a scale of 0 to 100, for determining target size
|
|
* for the current frame. The value 0 indicates the optimal CBR mode
|
|
* value should be used. The value 100 indicates the optimal VBR mode
|
|
* value should be used. Values in between indicate which way the
|
|
* encoder should "lean."
|
|
*/
|
|
unsigned int rc_2pass_vbr_bias_pct;
|
|
|
|
/*!\brief Two-pass mode per-GOP minimum bitrate
|
|
*
|
|
* This value, expressed as a percentage of the target bitrate, indicates
|
|
* the minimum bitrate to be used for a single GOP (aka "section")
|
|
*/
|
|
unsigned int rc_2pass_vbr_minsection_pct;
|
|
|
|
/*!\brief Two-pass mode per-GOP maximum bitrate
|
|
*
|
|
* This value, expressed as a percentage of the target bitrate, indicates
|
|
* the maximum bitrate to be used for a single GOP (aka "section")
|
|
*/
|
|
unsigned int rc_2pass_vbr_maxsection_pct;
|
|
|
|
/*
|
|
* keyframing settings (kf)
|
|
*/
|
|
|
|
/*!\brief Option to enable forward reference key frame
|
|
*
|
|
*/
|
|
int fwd_kf_enabled;
|
|
|
|
/*!\brief Keyframe placement mode
|
|
*
|
|
* This value indicates whether the encoder should place keyframes at a
|
|
* fixed interval, or determine the optimal placement automatically
|
|
* (as governed by the #kf_min_dist and #kf_max_dist parameters)
|
|
*/
|
|
enum aom_kf_mode kf_mode;
|
|
|
|
/*!\brief Keyframe minimum interval
|
|
*
|
|
* This value, expressed as a number of frames, prevents the encoder from
|
|
* placing a keyframe nearer than kf_min_dist to the previous keyframe. At
|
|
* least kf_min_dist frames non-keyframes will be coded before the next
|
|
* keyframe. Set kf_min_dist equal to kf_max_dist for a fixed interval.
|
|
*/
|
|
unsigned int kf_min_dist;
|
|
|
|
/*!\brief Keyframe maximum interval
|
|
*
|
|
* This value, expressed as a number of frames, forces the encoder to code
|
|
* a keyframe if one has not been coded in the last kf_max_dist frames.
|
|
* A value of 0 implies all frames will be keyframes. Set kf_min_dist
|
|
* equal to kf_max_dist for a fixed interval.
|
|
*/
|
|
unsigned int kf_max_dist;
|
|
|
|
/*!\brief sframe interval
|
|
*
|
|
* This value, expressed as a number of frames, forces the encoder to code
|
|
* an S-Frame every sframe_dist frames.
|
|
*/
|
|
unsigned int sframe_dist;
|
|
|
|
/*!\brief sframe insertion mode
|
|
*
|
|
* This value must be set to 1 or 2, and tells the encoder how to insert
|
|
* S-Frames. It will only have an effect if sframe_dist != 0.
|
|
*
|
|
* If altref is enabled:
|
|
* - if sframe_mode == 1, the considered frame will be made into an
|
|
* S-Frame only if it is an altref frame
|
|
* - if sframe_mode == 2, the next altref frame will be made into an
|
|
* S-Frame.
|
|
*
|
|
* Otherwise: the considered frame will be made into an S-Frame.
|
|
*/
|
|
unsigned int sframe_mode;
|
|
|
|
/*!\brief Tile coding mode
|
|
*
|
|
* This value indicates the tile coding mode.
|
|
* A value of 0 implies a normal non-large-scale tile coding. A value of 1
|
|
* implies a large-scale tile coding.
|
|
*/
|
|
unsigned int large_scale_tile;
|
|
|
|
/*!\brief Monochrome mode
|
|
*
|
|
* If this is nonzero, the encoder will generate a monochrome stream
|
|
* with no chroma planes.
|
|
*/
|
|
unsigned int monochrome;
|
|
|
|
/*!\brief full_still_picture_hdr
|
|
*
|
|
* If this is nonzero, the encoder will generate a full header even for
|
|
* still picture encoding. if zero, a reduced header is used for still
|
|
* picture. This flag has no effect when a regular video with more than
|
|
* a single frame is encoded.
|
|
*/
|
|
unsigned int full_still_picture_hdr;
|
|
|
|
/*!\brief Bitstream syntax mode
|
|
*
|
|
* This value indicates the bitstream syntax mode.
|
|
* A value of 0 indicates bitstream is saved as Section 5 bitstream. A value
|
|
* of 1 indicates the bitstream is saved in Annex-B format
|
|
*/
|
|
unsigned int save_as_annexb;
|
|
|
|
/*!\brief Number of explicit tile widths specified
|
|
*
|
|
* This value indicates the number of tile widths specified
|
|
* A value of 0 implies no tile widths are specified.
|
|
* Tile widths are given in the array tile_widths[]
|
|
*/
|
|
int tile_width_count;
|
|
|
|
/*!\brief Number of explicit tile heights specified
|
|
*
|
|
* This value indicates the number of tile heights specified
|
|
* A value of 0 implies no tile heights are specified.
|
|
* Tile heights are given in the array tile_heights[]
|
|
*/
|
|
int tile_height_count;
|
|
|
|
/*!\brief Maximum number of tile widths in tile widths array
|
|
*
|
|
* This define gives the maximum number of elements in the tile_widths array.
|
|
*/
|
|
#define MAX_TILE_WIDTHS 64 // maximum tile width array length
|
|
|
|
/*!\brief Array of specified tile widths
|
|
*
|
|
* This array specifies tile widths (and may be empty)
|
|
* The number of widths specified is given by tile_width_count
|
|
*/
|
|
int tile_widths[MAX_TILE_WIDTHS];
|
|
|
|
/*!\brief Maximum number of tile heights in tile heights array.
|
|
*
|
|
* This define gives the maximum number of elements in the tile_heights array.
|
|
*/
|
|
#define MAX_TILE_HEIGHTS 64 // maximum tile height array length
|
|
|
|
/*!\brief Array of specified tile heights
|
|
*
|
|
* This array specifies tile heights (and may be empty)
|
|
* The number of heights specified is given by tile_height_count
|
|
*/
|
|
int tile_heights[MAX_TILE_HEIGHTS];
|
|
|
|
/*!\brief Whether encoder should use fixed QP offsets.
|
|
*
|
|
* If a value of 1 is provided, encoder will use fixed QP offsets for frames
|
|
* at different levels of the pyramid.
|
|
* - If 'fixed_qp_offsets' is also provided, encoder will use the given
|
|
* offsets
|
|
* - If not, encoder will select the fixed offsets based on the cq-level
|
|
* provided.
|
|
* If a value of 0 is provided and fixed_qp_offset are not provided, encoder
|
|
* will NOT use fixed QP offsets.
|
|
* Note: This option is only relevant for --end-usage=q.
|
|
*/
|
|
unsigned int use_fixed_qp_offsets;
|
|
|
|
/*!\brief Number of fixed QP offsets
|
|
*
|
|
* This defines the number of elements in the fixed_qp_offsets array.
|
|
*/
|
|
#define FIXED_QP_OFFSET_COUNT 5
|
|
|
|
/*!\brief Array of fixed QP offsets
|
|
*
|
|
* This array specifies fixed QP offsets (range: 0 to 63) for frames at
|
|
* different levels of the pyramid. It is a comma-separated list of 5 values:
|
|
* - QP offset for keyframe
|
|
* - QP offset for ALTREF frame
|
|
* - QP offset for 1st level internal ARF
|
|
* - QP offset for 2nd level internal ARF
|
|
* - QP offset for 3rd level internal ARF
|
|
* Notes:
|
|
* - QP offset for leaf level frames is not explicitly specified. These frames
|
|
* use the worst quality allowed (--cq-level).
|
|
* - This option is only relevant for --end-usage=q.
|
|
*/
|
|
int fixed_qp_offsets[FIXED_QP_OFFSET_COUNT];
|
|
|
|
/*!\brief Options defined per config file
|
|
*
|
|
*/
|
|
cfg_options_t encoder_cfg;
|
|
} aom_codec_enc_cfg_t; /**< alias for struct aom_codec_enc_cfg */
|
|
|
|
/*!\brief Initialize an encoder instance
|
|
*
|
|
* Initializes a encoder context using the given interface. Applications
|
|
* should call the aom_codec_enc_init convenience macro instead of this
|
|
* function directly, to ensure that the ABI version number parameter
|
|
* is properly initialized.
|
|
*
|
|
* If the library was configured with --disable-multithread, this call
|
|
* is not thread safe and should be guarded with a lock if being used
|
|
* in a multithreaded context.
|
|
*
|
|
* \param[in] ctx Pointer to this instance's context.
|
|
* \param[in] iface Pointer to the algorithm interface to use.
|
|
* \param[in] cfg Configuration to use, if known.
|
|
* \param[in] flags Bitfield of AOM_CODEC_USE_* flags
|
|
* \param[in] ver ABI version number. Must be set to
|
|
* AOM_ENCODER_ABI_VERSION
|
|
* \retval #AOM_CODEC_OK
|
|
* The decoder algorithm initialized.
|
|
* \retval #AOM_CODEC_MEM_ERROR
|
|
* Memory allocation failed.
|
|
*/
|
|
aom_codec_err_t aom_codec_enc_init_ver(aom_codec_ctx_t *ctx,
|
|
aom_codec_iface_t *iface,
|
|
const aom_codec_enc_cfg_t *cfg,
|
|
aom_codec_flags_t flags, int ver);
|
|
|
|
/*!\brief Convenience macro for aom_codec_enc_init_ver()
|
|
*
|
|
* Ensures the ABI version parameter is properly set.
|
|
*/
|
|
#define aom_codec_enc_init(ctx, iface, cfg, flags) \
|
|
aom_codec_enc_init_ver(ctx, iface, cfg, flags, AOM_ENCODER_ABI_VERSION)
|
|
|
|
/*!\brief Get the default configuration for a usage.
|
|
*
|
|
* Initializes an encoder configuration structure with default values. Supports
|
|
* the notion of "usages" so that an algorithm may offer different default
|
|
* settings depending on the user's intended goal. This function \ref SHOULD
|
|
* be called by all applications to initialize the configuration structure
|
|
* before specializing the configuration with application specific values.
|
|
*
|
|
* \param[in] iface Pointer to the algorithm interface to use.
|
|
* \param[out] cfg Configuration buffer to populate.
|
|
* \param[in] usage Algorithm specific usage value. For AV1, must be
|
|
* set to AOM_USAGE_GOOD_QUALITY (0) or
|
|
* AOM_USAGE_REALTIME (1).
|
|
*
|
|
* \retval #AOM_CODEC_OK
|
|
* The configuration was populated.
|
|
* \retval #AOM_CODEC_INCAPABLE
|
|
* Interface is not an encoder interface.
|
|
* \retval #AOM_CODEC_INVALID_PARAM
|
|
* A parameter was NULL, or the usage value was not recognized.
|
|
*/
|
|
aom_codec_err_t aom_codec_enc_config_default(aom_codec_iface_t *iface,
|
|
aom_codec_enc_cfg_t *cfg,
|
|
unsigned int usage);
|
|
|
|
/*!\brief Set or change configuration
|
|
*
|
|
* Reconfigures an encoder instance according to the given configuration.
|
|
*
|
|
* \param[in] ctx Pointer to this instance's context
|
|
* \param[in] cfg Configuration buffer to use
|
|
*
|
|
* \retval #AOM_CODEC_OK
|
|
* The configuration was populated.
|
|
* \retval #AOM_CODEC_INCAPABLE
|
|
* Interface is not an encoder interface.
|
|
* \retval #AOM_CODEC_INVALID_PARAM
|
|
* A parameter was NULL, or the usage value was not recognized.
|
|
*/
|
|
aom_codec_err_t aom_codec_enc_config_set(aom_codec_ctx_t *ctx,
|
|
const aom_codec_enc_cfg_t *cfg);
|
|
|
|
/*!\brief Get global stream headers
|
|
*
|
|
* Retrieves a stream level global header packet, if supported by the codec.
|
|
* Calls to this function should be deferred until all configuration information
|
|
* has been passed to libaom. Otherwise the global header data may be
|
|
* invalidated by additional configuration changes.
|
|
*
|
|
* The AV1 implementation of this function returns an OBU. The OBU returned is
|
|
* in Low Overhead Bitstream Format. Specifically, the obu_has_size_field bit is
|
|
* set, and the buffer contains the obu_size field for the returned OBU.
|
|
*
|
|
* \param[in] ctx Pointer to this instance's context
|
|
*
|
|
* \retval NULL
|
|
* Encoder does not support global header, or an error occurred while
|
|
* generating the global header.
|
|
*
|
|
* \retval Non-NULL
|
|
* Pointer to buffer containing global header packet. The caller owns the
|
|
* memory associated with this buffer, and must free the 'buf' member of the
|
|
* aom_fixed_buf_t as well as the aom_fixed_buf_t pointer. Memory returned
|
|
* must be freed via call to free().
|
|
*/
|
|
aom_fixed_buf_t *aom_codec_get_global_headers(aom_codec_ctx_t *ctx);
|
|
|
|
/*!\brief usage parameter analogous to AV1 GOOD QUALITY mode. */
|
|
#define AOM_USAGE_GOOD_QUALITY (0)
|
|
/*!\brief usage parameter analogous to AV1 REALTIME mode. */
|
|
#define AOM_USAGE_REALTIME (1)
|
|
|
|
/*!\brief Encode a frame
|
|
*
|
|
* Encodes a video frame at the given "presentation time." The presentation
|
|
* time stamp (PTS) \ref MUST be strictly increasing.
|
|
*
|
|
* When the last frame has been passed to the encoder, this function should
|
|
* continue to be called in a loop, with the img parameter set to NULL. This
|
|
* will signal the end-of-stream condition to the encoder and allow it to
|
|
* encode any held buffers. Encoding is complete when aom_codec_encode() is
|
|
* called with img set to NULL and aom_codec_get_cx_data() returns no data.
|
|
*
|
|
* \param[in] ctx Pointer to this instance's context
|
|
* \param[in] img Image data to encode, NULL to flush.
|
|
* \param[in] pts Presentation time stamp, in timebase units. If img
|
|
* is NULL, pts is ignored.
|
|
* \param[in] duration Duration to show frame, in timebase units. If img
|
|
* is not NULL, duration must be nonzero. If img is
|
|
* NULL, duration is ignored.
|
|
* \param[in] flags Flags to use for encoding this frame.
|
|
*
|
|
* \retval #AOM_CODEC_OK
|
|
* The configuration was populated.
|
|
* \retval #AOM_CODEC_INCAPABLE
|
|
* Interface is not an encoder interface.
|
|
* \retval #AOM_CODEC_INVALID_PARAM
|
|
* A parameter was NULL, the image format is unsupported, etc.
|
|
*/
|
|
aom_codec_err_t aom_codec_encode(aom_codec_ctx_t *ctx, const aom_image_t *img,
|
|
aom_codec_pts_t pts, unsigned long duration,
|
|
aom_enc_frame_flags_t flags);
|
|
|
|
/*!\brief Set compressed data output buffer
|
|
*
|
|
* Sets the buffer that the codec should output the compressed data
|
|
* into. This call effectively sets the buffer pointer returned in the
|
|
* next AOM_CODEC_CX_FRAME_PKT packet. Subsequent packets will be
|
|
* appended into this buffer. The buffer is preserved across frames,
|
|
* so applications must periodically call this function after flushing
|
|
* the accumulated compressed data to disk or to the network to reset
|
|
* the pointer to the buffer's head.
|
|
*
|
|
* `pad_before` bytes will be skipped before writing the compressed
|
|
* data, and `pad_after` bytes will be appended to the packet. The size
|
|
* of the packet will be the sum of the size of the actual compressed
|
|
* data, pad_before, and pad_after. The padding bytes will be preserved
|
|
* (not overwritten).
|
|
*
|
|
* Note that calling this function does not guarantee that the returned
|
|
* compressed data will be placed into the specified buffer. In the
|
|
* event that the encoded data will not fit into the buffer provided,
|
|
* the returned packet \ref MAY point to an internal buffer, as it would
|
|
* if this call were never used. In this event, the output packet will
|
|
* NOT have any padding, and the application must free space and copy it
|
|
* to the proper place. This is of particular note in configurations
|
|
* that may output multiple packets for a single encoded frame (e.g., lagged
|
|
* encoding) or if the application does not reset the buffer periodically.
|
|
*
|
|
* Applications may restore the default behavior of the codec providing
|
|
* the compressed data buffer by calling this function with a NULL
|
|
* buffer.
|
|
*
|
|
* Applications \ref MUSTNOT call this function during iteration of
|
|
* aom_codec_get_cx_data().
|
|
*
|
|
* \param[in] ctx Pointer to this instance's context
|
|
* \param[in] buf Buffer to store compressed data into
|
|
* \param[in] pad_before Bytes to skip before writing compressed data
|
|
* \param[in] pad_after Bytes to skip after writing compressed data
|
|
*
|
|
* \retval #AOM_CODEC_OK
|
|
* The buffer was set successfully.
|
|
* \retval #AOM_CODEC_INVALID_PARAM
|
|
* A parameter was NULL, the image format is unsupported, etc.
|
|
*/
|
|
aom_codec_err_t aom_codec_set_cx_data_buf(aom_codec_ctx_t *ctx,
|
|
const aom_fixed_buf_t *buf,
|
|
unsigned int pad_before,
|
|
unsigned int pad_after);
|
|
|
|
/*!\brief Encoded data iterator
|
|
*
|
|
* Iterates over a list of data packets to be passed from the encoder to the
|
|
* application. The different kinds of packets available are enumerated in
|
|
* #aom_codec_cx_pkt_kind.
|
|
*
|
|
* #AOM_CODEC_CX_FRAME_PKT packets should be passed to the application's
|
|
* muxer. Multiple compressed frames may be in the list.
|
|
* #AOM_CODEC_STATS_PKT packets should be appended to a global buffer.
|
|
*
|
|
* The application \ref MUST silently ignore any packet kinds that it does
|
|
* not recognize or support.
|
|
*
|
|
* The data buffers returned from this function are only guaranteed to be
|
|
* valid until the application makes another call to any aom_codec_* function.
|
|
*
|
|
* \param[in] ctx Pointer to this instance's context
|
|
* \param[in,out] iter Iterator storage, initialized to NULL
|
|
*
|
|
* \return Returns a pointer to an output data packet (compressed frame data,
|
|
* two-pass statistics, etc.) or NULL to signal end-of-list.
|
|
*
|
|
*/
|
|
const aom_codec_cx_pkt_t *aom_codec_get_cx_data(aom_codec_ctx_t *ctx,
|
|
aom_codec_iter_t *iter);
|
|
|
|
/*!\brief Get Preview Frame
|
|
*
|
|
* Returns an image that can be used as a preview. Shows the image as it would
|
|
* exist at the decompressor. The application \ref MUST NOT write into this
|
|
* image buffer.
|
|
*
|
|
* \param[in] ctx Pointer to this instance's context
|
|
*
|
|
* \return Returns a pointer to a preview image, or NULL if no image is
|
|
* available.
|
|
*
|
|
*/
|
|
const aom_image_t *aom_codec_get_preview_frame(aom_codec_ctx_t *ctx);
|
|
|
|
/*!@} - end defgroup encoder*/
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif // AOM_AOM_AOM_ENCODER_H_
|