1043 lines
40 KiB
C++
1043 lines
40 KiB
C++
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VPX_VPX_ENCODER_H_
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#define VPX_VPX_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 "./vpx_codec.h"
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/*! Temporal Scalability: Maximum length of the sequence defining frame
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* layer membership
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*/
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#define VPX_TS_MAX_PERIODICITY 16
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/*! Temporal Scalability: Maximum number of coding layers */
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#define VPX_TS_MAX_LAYERS 5
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/*!\deprecated Use #VPX_TS_MAX_PERIODICITY instead. */
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#define MAX_PERIODICITY VPX_TS_MAX_PERIODICITY
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/*! Temporal+Spatial Scalability: Maximum number of coding layers */
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#define VPX_MAX_LAYERS 12 // 3 temporal + 4 spatial layers are allowed.
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/*!\deprecated Use #VPX_MAX_LAYERS instead. */
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#define MAX_LAYERS VPX_MAX_LAYERS // 3 temporal + 4 spatial layers allowed.
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/*! Spatial Scalability: Maximum number of coding layers */
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#define VPX_SS_MAX_LAYERS 5
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/*! Spatial Scalability: Default number of coding layers */
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#define VPX_SS_DEFAULT_LAYERS 1
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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 VPX_ENCODER_ABI_VERSION (5 + VPX_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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* ::vpx_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 VPX_CODEC_CAP_* defines.
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*/
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#define VPX_CODEC_CAP_PSNR 0x10000 /**< Can issue PSNR packets */
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/*! Can output one partition at a time. Each partition is returned in its
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* own VPX_CODEC_CX_FRAME_PKT, with the FRAME_IS_FRAGMENT flag set for
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* every partition but the last. In this mode all frames are always
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* returned partition by partition.
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*/
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#define VPX_CODEC_CAP_OUTPUT_PARTITION 0x20000
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/*! Can support input images at greater than 8 bitdepth.
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*/
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#define VPX_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 VPX_CODEC_USE_* defines.
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*/
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#define VPX_CODEC_USE_PSNR 0x10000 /**< Calculate PSNR on each frame */
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#define VPX_CODEC_USE_OUTPUT_PARTITION 0x20000 /**< Make the encoder output one
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partition at a time. */
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#define VPX_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 vpx_fixed_buf {
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void *buf; /**< Pointer to the data */
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size_t sz; /**< Length of the buffer, in chars */
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} vpx_fixed_buf_t; /**< alias for struct vpx_fixed_buf */
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/*!\brief Time Stamp Type
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*
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* An integer, which when multiplied by the stream's time base, provides
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* the absolute time of a sample.
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*/
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typedef int64_t vpx_codec_pts_t;
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/*!\brief Compressed Frame Flags
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*
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* This type represents a bitfield containing information about a compressed
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* frame that may be useful to an application. The most significant 16 bits
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* can be used by an algorithm to provide additional detail, for example to
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* support frame types that are codec specific (MPEG-1 D-frames for example)
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*/
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typedef uint32_t vpx_codec_frame_flags_t;
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#define VPX_FRAME_IS_KEY 0x1 /**< frame is the start of a GOP */
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#define VPX_FRAME_IS_DROPPABLE 0x2 /**< frame can be dropped without affecting
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the stream (no future frame depends on
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this one) */
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#define VPX_FRAME_IS_INVISIBLE 0x4 /**< frame should be decoded but will not
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be shown */
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#define VPX_FRAME_IS_FRAGMENT 0x8 /**< this is a fragment of the encoded
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frame */
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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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* vpx_codec_enc_cfg::g_error_resilient variable.
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*/
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typedef uint32_t vpx_codec_er_flags_t;
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#define VPX_ERROR_RESILIENT_DEFAULT 0x1 /**< Improve resiliency against
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losses of whole frames */
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#define VPX_ERROR_RESILIENT_PARTITIONS 0x2 /**< The frame partitions are
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independently decodable by the
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bool decoder, meaning that
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partitions can be decoded even
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though earlier partitions have
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been lost. Note that intra
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prediction is still done over
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the partition boundary. */
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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 vpx_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 vpx_codec_cx_pkt_kind {
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VPX_CODEC_CX_FRAME_PKT, /**< Compressed video frame */
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VPX_CODEC_STATS_PKT, /**< Two-pass statistics for this frame */
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VPX_CODEC_FPMB_STATS_PKT, /**< first pass mb statistics for this frame */
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VPX_CODEC_PSNR_PKT, /**< PSNR statistics for this frame */
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// Spatial SVC is still experimental and may be removed before the next ABI
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// bump.
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#if VPX_ENCODER_ABI_VERSION > (5 + VPX_CODEC_ABI_VERSION)
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VPX_CODEC_SPATIAL_SVC_LAYER_SIZES, /**< Sizes for each layer in this frame*/
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VPX_CODEC_SPATIAL_SVC_LAYER_PSNR, /**< PSNR for each layer in this frame*/
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#endif
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VPX_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 vpx_codec_cx_pkt {
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enum vpx_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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vpx_codec_pts_t pts; /**< time stamp to show frame
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(in timebase units) */
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unsigned long duration; /**< duration to show frame
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(in timebase units) */
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vpx_codec_frame_flags_t flags; /**< flags for this frame */
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int partition_id; /**< the partition id
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defines the decoding order
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of the partitions. Only
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applicable when "output partition"
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mode is enabled. First partition
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has id 0.*/
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} frame; /**< data for compressed frame packet */
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vpx_fixed_buf_t twopass_stats; /**< data for two-pass packet */
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vpx_fixed_buf_t firstpass_mb_stats; /**< first pass mb packet */
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struct vpx_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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vpx_fixed_buf_t raw; /**< data for arbitrary packets */
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// Spatial SVC is still experimental and may be removed before the next
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// ABI bump.
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#if VPX_ENCODER_ABI_VERSION > (5 + VPX_CODEC_ABI_VERSION)
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size_t layer_sizes[VPX_SS_MAX_LAYERS];
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struct vpx_psnr_pkt layer_psnr[VPX_SS_MAX_LAYERS];
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#endif
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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 vpx_codec_cx_pkt_kind)]; /**< fixed sz */
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} data; /**< packet data */
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} vpx_codec_cx_pkt_t; /**< alias for struct vpx_codec_cx_pkt */
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/*!\brief Encoder return output buffer callback
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*
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* This callback function, when registered, returns with packets when each
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* spatial layer is encoded.
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*/
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// putting the definitions here for now. (agrange: find if there
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// is a better place for this)
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typedef void (* vpx_codec_enc_output_cx_pkt_cb_fn_t)(vpx_codec_cx_pkt_t *pkt,
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void *user_data);
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/*!\brief Callback function pointer / user data pair storage */
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typedef struct vpx_codec_enc_output_cx_cb_pair {
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vpx_codec_enc_output_cx_pkt_cb_fn_t output_cx_pkt; /**< Callback function */
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void *user_priv; /**< Pointer to private data */
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} vpx_codec_priv_output_cx_pkt_cb_pair_t;
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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 vpx_rational {
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int num; /**< fraction numerator */
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int den; /**< fraction denominator */
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} vpx_rational_t; /**< alias for struct vpx_rational */
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/*!\brief Multi-pass Encoding Pass */
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enum vpx_enc_pass {
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VPX_RC_ONE_PASS, /**< Single pass mode */
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VPX_RC_FIRST_PASS, /**< First pass of multi-pass mode */
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VPX_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 vpx_rc_mode {
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VPX_VBR, /**< Variable Bit Rate (VBR) mode */
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VPX_CBR, /**< Constant Bit Rate (CBR) mode */
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VPX_CQ, /**< Constrained Quality (CQ) mode */
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VPX_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 VPX_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 VPX_KF_AUTO and VPX_KF_DISABLED.
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*/
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enum vpx_kf_mode {
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VPX_KF_FIXED, /**< deprecated, implies VPX_KF_DISABLED */
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VPX_KF_AUTO, /**< Encoder determines optimal placement automatically */
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VPX_KF_DISABLED = 0 /**< Encoder does not place keyframes. */
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};
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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 vpx_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 VPX_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 vpx_enc_frame_flags_t;
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#define VPX_EFLAG_FORCE_KF (1<<0) /**< Force this frame to be a keyframe */
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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 vpx_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 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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* vpx_bit_depth_t enum.
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*/
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vpx_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 vpx_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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vpx_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 #VPX_RC_ONE_PASS.
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*/
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enum vpx_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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* 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 vpx VPx 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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/*!\brief Enable/disable 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
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* version of the frame, which is then upscaled by the encoder to the
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* correct presentation resolution. This increases visual quality at
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* low data rates, at the expense of CPU time on the encoder/decoder.
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*/
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unsigned int rc_resize_allowed;
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/*!\brief Internal coded frame width.
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*
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* If spatial resampling is enabled this specifies the width of the
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* encoded frame.
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*/
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unsigned int rc_scaled_width;
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/*!\brief Internal coded frame height.
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*
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* If spatial resampling is enabled this specifies the height of the
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* encoded frame.
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*/
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unsigned int rc_scaled_height;
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/*!\brief Spatial resampling up watermark.
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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 rises above this percentage of fullness, the
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* encoder will step up to a higher resolution version of the frame.
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*/
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unsigned int rc_resize_up_thresh;
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/*!\brief Spatial resampling down watermark.
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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, the
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* encoder will step down to a lower resolution version of the frame.
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*/
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unsigned int rc_resize_down_thresh;
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/*!\brief Rate control algorithm to use.
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*
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* Indicates whether the end usage of this stream is to be streamed over
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* a bandwidth constrained link, indicating that Constant Bit Rate (CBR)
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* mode should be used, or whether it will be played back on a high
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* bandwidth link, as from a local disk, where higher variations in
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* bitrate are acceptable.
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*/
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enum vpx_rc_mode rc_end_usage;
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|
|
/*!\brief Two-pass stats buffer.
|
|
*
|
|
* A buffer containing all of the stats packets produced in the first
|
|
* pass, concatenated.
|
|
*/
|
|
vpx_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.
|
|
*/
|
|
vpx_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
|
|
* vpx_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
|
|
* vpx_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, expressed as a percentage of the target bitrate,
|
|
* controls the maximum allowed adaptation speed of the codec.
|
|
* This factor controls the maximum amount of bits that can
|
|
* be subtracted from the target bitrate in order to compensate
|
|
* for prior overshoot.
|
|
*
|
|
* Valid values in the range 0-1000.
|
|
*/
|
|
unsigned int rc_undershoot_pct;
|
|
|
|
|
|
/*!\brief Rate control adaptation overshoot control
|
|
*
|
|
* This value, expressed as a percentage of the target bitrate,
|
|
* controls the maximum allowed adaptation speed of the codec.
|
|
* This factor controls the maximum amount of bits that can
|
|
* be added to the target bitrate in order to compensate for
|
|
* prior undershoot.
|
|
*
|
|
* 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; /**< RC mode bias between CBR and VBR(0-100: 0->CBR, 100->VBR) */
|
|
|
|
|
|
/*!\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 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 vpx_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;
|
|
|
|
/*
|
|
* Spatial scalability settings (ss)
|
|
*/
|
|
|
|
/*!\brief Number of spatial coding layers.
|
|
*
|
|
* This value specifies the number of spatial coding layers to be used.
|
|
*/
|
|
unsigned int ss_number_layers;
|
|
|
|
/*!\brief Enable auto alt reference flags for each spatial layer.
|
|
*
|
|
* These values specify if auto alt reference frame is enabled for each
|
|
* spatial layer.
|
|
*/
|
|
int ss_enable_auto_alt_ref[VPX_SS_MAX_LAYERS];
|
|
|
|
/*!\brief Target bitrate for each spatial layer.
|
|
*
|
|
* These values specify the target coding bitrate to be used for each
|
|
* spatial layer.
|
|
*/
|
|
unsigned int ss_target_bitrate[VPX_SS_MAX_LAYERS];
|
|
|
|
/*!\brief Number of temporal coding layers.
|
|
*
|
|
* This value specifies the number of temporal layers to be used.
|
|
*/
|
|
unsigned int ts_number_layers;
|
|
|
|
/*!\brief Target bitrate for each temporal layer.
|
|
*
|
|
* These values specify the target coding bitrate to be used for each
|
|
* temporal layer.
|
|
*/
|
|
unsigned int ts_target_bitrate[VPX_TS_MAX_LAYERS];
|
|
|
|
/*!\brief Frame rate decimation factor for each temporal layer.
|
|
*
|
|
* These values specify the frame rate decimation factors to apply
|
|
* to each temporal layer.
|
|
*/
|
|
unsigned int ts_rate_decimator[VPX_TS_MAX_LAYERS];
|
|
|
|
/*!\brief Length of the sequence defining frame temporal layer membership.
|
|
*
|
|
* This value specifies the length of the sequence that defines the
|
|
* membership of frames to temporal layers. For example, if the
|
|
* ts_periodicity = 8, then the frames are assigned to coding layers with a
|
|
* repeated sequence of length 8.
|
|
*/
|
|
unsigned int ts_periodicity;
|
|
|
|
/*!\brief Template defining the membership of frames to temporal layers.
|
|
*
|
|
* This array defines the membership of frames to temporal coding layers.
|
|
* For a 2-layer encoding that assigns even numbered frames to one temporal
|
|
* layer (0) and odd numbered frames to a second temporal layer (1) with
|
|
* ts_periodicity=8, then ts_layer_id = (0,1,0,1,0,1,0,1).
|
|
*/
|
|
unsigned int ts_layer_id[VPX_TS_MAX_PERIODICITY];
|
|
|
|
/*!\brief Target bitrate for each spatial/temporal layer.
|
|
*
|
|
* These values specify the target coding bitrate to be used for each
|
|
* spatial/temporal layer.
|
|
*
|
|
*/
|
|
unsigned int layer_target_bitrate[VPX_MAX_LAYERS];
|
|
|
|
/*!\brief Temporal layering mode indicating which temporal layering scheme to use.
|
|
*
|
|
* The value (refer to VP9E_TEMPORAL_LAYERING_MODE) specifies the
|
|
* temporal layering mode to use.
|
|
*
|
|
*/
|
|
int temporal_layering_mode;
|
|
} vpx_codec_enc_cfg_t; /**< alias for struct vpx_codec_enc_cfg */
|
|
|
|
/*!\brief vp9 svc extra configure parameters
|
|
*
|
|
* This defines max/min quantizers and scale factors for each layer
|
|
*
|
|
*/
|
|
typedef struct vpx_svc_parameters {
|
|
int max_quantizers[VPX_MAX_LAYERS]; /**< Max Q for each layer */
|
|
int min_quantizers[VPX_MAX_LAYERS]; /**< Min Q for each layer */
|
|
int scaling_factor_num[VPX_MAX_LAYERS]; /**< Scaling factor-numerator */
|
|
int scaling_factor_den[VPX_MAX_LAYERS]; /**< Scaling factor-denominator */
|
|
int temporal_layering_mode; /**< Temporal layering mode */
|
|
} vpx_svc_extra_cfg_t;
|
|
|
|
|
|
/*!\brief Initialize an encoder instance
|
|
*
|
|
* Initializes a encoder context using the given interface. Applications
|
|
* should call the vpx_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. May be NULL.
|
|
* \param[in] flags Bitfield of VPX_CODEC_USE_* flags
|
|
* \param[in] ver ABI version number. Must be set to
|
|
* VPX_ENCODER_ABI_VERSION
|
|
* \retval #VPX_CODEC_OK
|
|
* The decoder algorithm initialized.
|
|
* \retval #VPX_CODEC_MEM_ERROR
|
|
* Memory allocation failed.
|
|
*/
|
|
vpx_codec_err_t vpx_codec_enc_init_ver(vpx_codec_ctx_t *ctx,
|
|
vpx_codec_iface_t *iface,
|
|
const vpx_codec_enc_cfg_t *cfg,
|
|
vpx_codec_flags_t flags,
|
|
int ver);
|
|
|
|
|
|
/*!\brief Convenience macro for vpx_codec_enc_init_ver()
|
|
*
|
|
* Ensures the ABI version parameter is properly set.
|
|
*/
|
|
#define vpx_codec_enc_init(ctx, iface, cfg, flags) \
|
|
vpx_codec_enc_init_ver(ctx, iface, cfg, flags, VPX_ENCODER_ABI_VERSION)
|
|
|
|
|
|
/*!\brief Initialize multi-encoder instance
|
|
*
|
|
* Initializes multi-encoder context using the given interface.
|
|
* Applications should call the vpx_codec_enc_init_multi convenience macro
|
|
* instead of this function directly, to ensure that the ABI version number
|
|
* parameter is properly initialized.
|
|
*
|
|
* \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. May be NULL.
|
|
* \param[in] num_enc Total number of encoders.
|
|
* \param[in] flags Bitfield of VPX_CODEC_USE_* flags
|
|
* \param[in] dsf Pointer to down-sampling factors.
|
|
* \param[in] ver ABI version number. Must be set to
|
|
* VPX_ENCODER_ABI_VERSION
|
|
* \retval #VPX_CODEC_OK
|
|
* The decoder algorithm initialized.
|
|
* \retval #VPX_CODEC_MEM_ERROR
|
|
* Memory allocation failed.
|
|
*/
|
|
vpx_codec_err_t vpx_codec_enc_init_multi_ver(vpx_codec_ctx_t *ctx,
|
|
vpx_codec_iface_t *iface,
|
|
vpx_codec_enc_cfg_t *cfg,
|
|
int num_enc,
|
|
vpx_codec_flags_t flags,
|
|
vpx_rational_t *dsf,
|
|
int ver);
|
|
|
|
|
|
/*!\brief Convenience macro for vpx_codec_enc_init_multi_ver()
|
|
*
|
|
* Ensures the ABI version parameter is properly set.
|
|
*/
|
|
#define vpx_codec_enc_init_multi(ctx, iface, cfg, num_enc, flags, dsf) \
|
|
vpx_codec_enc_init_multi_ver(ctx, iface, cfg, num_enc, flags, dsf, \
|
|
VPX_ENCODER_ABI_VERSION)
|
|
|
|
|
|
/*!\brief Get a default configuration
|
|
*
|
|
* Initializes a 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] reserved Must set to 0 for VP8 and VP9.
|
|
*
|
|
* \retval #VPX_CODEC_OK
|
|
* The configuration was populated.
|
|
* \retval #VPX_CODEC_INCAPABLE
|
|
* Interface is not an encoder interface.
|
|
* \retval #VPX_CODEC_INVALID_PARAM
|
|
* A parameter was NULL, or the usage value was not recognized.
|
|
*/
|
|
vpx_codec_err_t vpx_codec_enc_config_default(vpx_codec_iface_t *iface,
|
|
vpx_codec_enc_cfg_t *cfg,
|
|
unsigned int reserved);
|
|
|
|
|
|
/*!\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 #VPX_CODEC_OK
|
|
* The configuration was populated.
|
|
* \retval #VPX_CODEC_INCAPABLE
|
|
* Interface is not an encoder interface.
|
|
* \retval #VPX_CODEC_INVALID_PARAM
|
|
* A parameter was NULL, or the usage value was not recognized.
|
|
*/
|
|
vpx_codec_err_t vpx_codec_enc_config_set(vpx_codec_ctx_t *ctx,
|
|
const vpx_codec_enc_cfg_t *cfg);
|
|
|
|
|
|
/*!\brief Get global stream headers
|
|
*
|
|
* Retrieves a stream level global header packet, if supported by the codec.
|
|
*
|
|
* \param[in] ctx Pointer to this instance's context
|
|
*
|
|
* \retval NULL
|
|
* Encoder does not support global header
|
|
* \retval Non-NULL
|
|
* Pointer to buffer containing global header packet
|
|
*/
|
|
vpx_fixed_buf_t *vpx_codec_get_global_headers(vpx_codec_ctx_t *ctx);
|
|
|
|
|
|
#define VPX_DL_REALTIME (1) /**< deadline parameter analogous to
|
|
* VPx REALTIME mode. */
|
|
#define VPX_DL_GOOD_QUALITY (1000000) /**< deadline parameter analogous to
|
|
* VPx GOOD QUALITY mode. */
|
|
#define VPX_DL_BEST_QUALITY (0) /**< deadline parameter analogous to
|
|
* VPx BEST QUALITY mode. */
|
|
/*!\brief Encode a frame
|
|
*
|
|
* Encodes a video frame at the given "presentation time." The presentation
|
|
* time stamp (PTS) \ref MUST be strictly increasing.
|
|
*
|
|
* The encoder supports the notion of a soft real-time deadline. Given a
|
|
* non-zero value to the deadline parameter, the encoder will make a "best
|
|
* effort" guarantee to return before the given time slice expires. It is
|
|
* implicit that limiting the available time to encode will degrade the
|
|
* output quality. The encoder can be given an unlimited time to produce the
|
|
* best possible frame by specifying a deadline of '0'. This deadline
|
|
* supercedes the VPx notion of "best quality, good quality, realtime".
|
|
* Applications that wish to map these former settings to the new deadline
|
|
* based system can use the symbols #VPX_DL_REALTIME, #VPX_DL_GOOD_QUALITY,
|
|
* and #VPX_DL_BEST_QUALITY.
|
|
*
|
|
* When the last frame has been passed to the encoder, this function should
|
|
* continue to be called, 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 vpx_codec_encode() is called
|
|
* and vpx_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.
|
|
* \param[in] duration Duration to show frame, in timebase units.
|
|
* \param[in] flags Flags to use for encoding this frame.
|
|
* \param[in] deadline Time to spend encoding, in microseconds. (0=infinite)
|
|
*
|
|
* \retval #VPX_CODEC_OK
|
|
* The configuration was populated.
|
|
* \retval #VPX_CODEC_INCAPABLE
|
|
* Interface is not an encoder interface.
|
|
* \retval #VPX_CODEC_INVALID_PARAM
|
|
* A parameter was NULL, the image format is unsupported, etc.
|
|
*/
|
|
vpx_codec_err_t vpx_codec_encode(vpx_codec_ctx_t *ctx,
|
|
const vpx_image_t *img,
|
|
vpx_codec_pts_t pts,
|
|
unsigned long duration,
|
|
vpx_enc_frame_flags_t flags,
|
|
unsigned long deadline);
|
|
|
|
/*!\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 VPX_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
|
|
* vpx_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 #VPX_CODEC_OK
|
|
* The buffer was set successfully.
|
|
* \retval #VPX_CODEC_INVALID_PARAM
|
|
* A parameter was NULL, the image format is unsupported, etc.
|
|
*/
|
|
vpx_codec_err_t vpx_codec_set_cx_data_buf(vpx_codec_ctx_t *ctx,
|
|
const vpx_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
|
|
* #vpx_codec_cx_pkt_kind.
|
|
*
|
|
* #VPX_CODEC_CX_FRAME_PKT packets should be passed to the application's
|
|
* muxer. Multiple compressed frames may be in the list.
|
|
* #VPX_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 vpx_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 vpx_codec_cx_pkt_t *vpx_codec_get_cx_data(vpx_codec_ctx_t *ctx,
|
|
vpx_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 vpx_image_t *vpx_codec_get_preview_frame(vpx_codec_ctx_t *ctx);
|
|
|
|
|
|
/*!@} - end defgroup encoder*/
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif // VPX_VPX_ENCODER_H_
|
|
|