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diff --git a/media/libvpx/vpx/vpx_encoder.h b/media/libvpx/vpx/vpx_encoder.h new file mode 100644 index 000000000..2b17f98a2 --- /dev/null +++ b/media/libvpx/vpx/vpx_encoder.h @@ -0,0 +1,1043 @@ +/* + * Copyright (c) 2010 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ +#ifndef VPX_VPX_ENCODER_H_ +#define VPX_VPX_ENCODER_H_ + +/*!\defgroup encoder Encoder Algorithm Interface + * \ingroup codec + * This abstraction allows applications using this encoder to easily support + * multiple video formats with minimal code duplication. This section describes + * the interface common to all encoders. + * @{ + */ + +/*!\file + * \brief Describes the encoder algorithm interface to applications. + * + * This file describes the interface between an application and a + * video encoder algorithm. + * + */ +#ifdef __cplusplus +extern "C" { +#endif + +#include "./vpx_codec.h" + + /*! Temporal Scalability: Maximum length of the sequence defining frame + * layer membership + */ +#define VPX_TS_MAX_PERIODICITY 16 + + /*! Temporal Scalability: Maximum number of coding layers */ +#define VPX_TS_MAX_LAYERS 5 + + /*!\deprecated Use #VPX_TS_MAX_PERIODICITY instead. */ +#define MAX_PERIODICITY VPX_TS_MAX_PERIODICITY + +/*! Temporal+Spatial Scalability: Maximum number of coding layers */ +#define VPX_MAX_LAYERS 12 // 3 temporal + 4 spatial layers are allowed. + +/*!\deprecated Use #VPX_MAX_LAYERS instead. */ +#define MAX_LAYERS VPX_MAX_LAYERS // 3 temporal + 4 spatial layers allowed. + +/*! Spatial Scalability: Maximum number of coding layers */ +#define VPX_SS_MAX_LAYERS 5 + +/*! Spatial Scalability: Default number of coding layers */ +#define VPX_SS_DEFAULT_LAYERS 1 + + /*!\brief Current ABI version number + * + * \internal + * If this file is altered in any way that changes the ABI, this value + * must be bumped. Examples include, but are not limited to, changing + * types, removing or reassigning enums, adding/removing/rearranging + * fields to structures + */ +#define VPX_ENCODER_ABI_VERSION (5 + VPX_CODEC_ABI_VERSION) /**<\hideinitializer*/ + + + /*! \brief Encoder capabilities bitfield + * + * Each encoder advertises the capabilities it supports as part of its + * ::vpx_codec_iface_t interface structure. Capabilities are extra + * interfaces or functionality, and are not required to be supported + * by an encoder. + * + * The available flags are specified by VPX_CODEC_CAP_* defines. + */ +#define VPX_CODEC_CAP_PSNR 0x10000 /**< Can issue PSNR packets */ + + /*! Can output one partition at a time. Each partition is returned in its + * own VPX_CODEC_CX_FRAME_PKT, with the FRAME_IS_FRAGMENT flag set for + * every partition but the last. In this mode all frames are always + * returned partition by partition. + */ +#define VPX_CODEC_CAP_OUTPUT_PARTITION 0x20000 + +/*! Can support input images at greater than 8 bitdepth. + */ +#define VPX_CODEC_CAP_HIGHBITDEPTH 0x40000 + + /*! \brief Initialization-time Feature Enabling + * + * Certain codec features must be known at initialization time, to allow + * for proper memory allocation. + * + * The available flags are specified by VPX_CODEC_USE_* defines. + */ +#define VPX_CODEC_USE_PSNR 0x10000 /**< Calculate PSNR on each frame */ +#define VPX_CODEC_USE_OUTPUT_PARTITION 0x20000 /**< Make the encoder output one + partition at a time. */ +#define VPX_CODEC_USE_HIGHBITDEPTH 0x40000 /**< Use high bitdepth */ + + + /*!\brief Generic fixed size buffer structure + * + * This structure is able to hold a reference to any fixed size buffer. + */ + typedef struct vpx_fixed_buf { + void *buf; /**< Pointer to the data */ + size_t sz; /**< Length of the buffer, in chars */ + } vpx_fixed_buf_t; /**< alias for struct vpx_fixed_buf */ + + + /*!\brief Time Stamp Type + * + * An integer, which when multiplied by the stream's time base, provides + * the absolute time of a sample. + */ + typedef int64_t vpx_codec_pts_t; + + + /*!\brief Compressed Frame Flags + * + * This type represents a bitfield containing information about a compressed + * frame that may be useful to an application. The most significant 16 bits + * can be used by an algorithm to provide additional detail, for example to + * support frame types that are codec specific (MPEG-1 D-frames for example) + */ + typedef uint32_t vpx_codec_frame_flags_t; +#define VPX_FRAME_IS_KEY 0x1 /**< frame is the start of a GOP */ +#define VPX_FRAME_IS_DROPPABLE 0x2 /**< frame can be dropped without affecting + the stream (no future frame depends on + this one) */ +#define VPX_FRAME_IS_INVISIBLE 0x4 /**< frame should be decoded but will not + be shown */ +#define VPX_FRAME_IS_FRAGMENT 0x8 /**< this is a fragment of the encoded + frame */ + + /*!\brief Error Resilient flags + * + * These flags define which error resilient features to enable in the + * encoder. The flags are specified through the + * vpx_codec_enc_cfg::g_error_resilient variable. + */ + typedef uint32_t vpx_codec_er_flags_t; +#define VPX_ERROR_RESILIENT_DEFAULT 0x1 /**< Improve resiliency against + losses of whole frames */ +#define VPX_ERROR_RESILIENT_PARTITIONS 0x2 /**< The frame partitions are + independently decodable by the + bool decoder, meaning that + partitions can be decoded even + though earlier partitions have + been lost. Note that intra + predicition is still done over + the partition boundary. */ + + /*!\brief Encoder output packet variants + * + * This enumeration lists the different kinds of data packets that can be + * returned by calls to vpx_codec_get_cx_data(). Algorithms \ref MAY + * extend this list to provide additional functionality. + */ + enum vpx_codec_cx_pkt_kind { + VPX_CODEC_CX_FRAME_PKT, /**< Compressed video frame */ + VPX_CODEC_STATS_PKT, /**< Two-pass statistics for this frame */ + VPX_CODEC_FPMB_STATS_PKT, /**< first pass mb statistics for this frame */ + VPX_CODEC_PSNR_PKT, /**< PSNR statistics for this frame */ + // Spatial SVC is still experimental and may be removed before the next ABI + // bump. +#if VPX_ENCODER_ABI_VERSION > (5 + VPX_CODEC_ABI_VERSION) + VPX_CODEC_SPATIAL_SVC_LAYER_SIZES, /**< Sizes for each layer in this frame*/ + VPX_CODEC_SPATIAL_SVC_LAYER_PSNR, /**< PSNR for each layer in this frame*/ +#endif + VPX_CODEC_CUSTOM_PKT = 256 /**< Algorithm extensions */ + }; + + + /*!\brief Encoder output packet + * + * This structure contains the different kinds of output data the encoder + * may produce while compressing a frame. + */ + typedef struct vpx_codec_cx_pkt { + enum vpx_codec_cx_pkt_kind kind; /**< packet variant */ + union { + struct { + void *buf; /**< compressed data buffer */ + size_t sz; /**< length of compressed data */ + vpx_codec_pts_t pts; /**< time stamp to show frame + (in timebase units) */ + unsigned long duration; /**< duration to show frame + (in timebase units) */ + vpx_codec_frame_flags_t flags; /**< flags for this frame */ + int partition_id; /**< the partition id + defines the decoding order + of the partitions. Only + applicable when "output partition" + mode is enabled. First partition + has id 0.*/ + + } frame; /**< data for compressed frame packet */ + vpx_fixed_buf_t twopass_stats; /**< data for two-pass packet */ + vpx_fixed_buf_t firstpass_mb_stats; /**< first pass mb packet */ + struct vpx_psnr_pkt { + unsigned int samples[4]; /**< Number of samples, total/y/u/v */ + uint64_t sse[4]; /**< sum squared error, total/y/u/v */ + double psnr[4]; /**< PSNR, total/y/u/v */ + } psnr; /**< data for PSNR packet */ + vpx_fixed_buf_t raw; /**< data for arbitrary packets */ + // Spatial SVC is still experimental and may be removed before the next + // ABI bump. +#if VPX_ENCODER_ABI_VERSION > (5 + VPX_CODEC_ABI_VERSION) + size_t layer_sizes[VPX_SS_MAX_LAYERS]; + struct vpx_psnr_pkt layer_psnr[VPX_SS_MAX_LAYERS]; +#endif + + /* This packet size is fixed to allow codecs to extend this + * interface without having to manage storage for raw packets, + * i.e., if it's smaller than 128 bytes, you can store in the + * packet list directly. + */ + char pad[128 - sizeof(enum vpx_codec_cx_pkt_kind)]; /**< fixed sz */ + } data; /**< packet data */ + } vpx_codec_cx_pkt_t; /**< alias for struct vpx_codec_cx_pkt */ + + + /*!\brief Encoder return output buffer callback + * + * This callback function, when registered, returns with packets when each + * spatial layer is encoded. + */ + // putting the definitions here for now. (agrange: find if there + // is a better place for this) + typedef void (* vpx_codec_enc_output_cx_pkt_cb_fn_t)(vpx_codec_cx_pkt_t *pkt, + void *user_data); + + /*!\brief Callback function pointer / user data pair storage */ + typedef struct vpx_codec_enc_output_cx_cb_pair { + vpx_codec_enc_output_cx_pkt_cb_fn_t output_cx_pkt; /**< Callback function */ + void *user_priv; /**< Pointer to private data */ + } vpx_codec_priv_output_cx_pkt_cb_pair_t; + + /*!\brief Rational Number + * + * This structure holds a fractional value. + */ + typedef struct vpx_rational { + int num; /**< fraction numerator */ + int den; /**< fraction denominator */ + } vpx_rational_t; /**< alias for struct vpx_rational */ + + + /*!\brief Multi-pass Encoding Pass */ + enum vpx_enc_pass { + VPX_RC_ONE_PASS, /**< Single pass mode */ + VPX_RC_FIRST_PASS, /**< First pass of multi-pass mode */ + VPX_RC_LAST_PASS /**< Final pass of multi-pass mode */ + }; + + + /*!\brief Rate control mode */ + enum vpx_rc_mode { + VPX_VBR, /**< Variable Bit Rate (VBR) mode */ + VPX_CBR, /**< Constant Bit Rate (CBR) mode */ + VPX_CQ, /**< Constrained Quality (CQ) mode */ + VPX_Q, /**< Constant Quality (Q) mode */ + }; + + + /*!\brief Keyframe placement mode. + * + * This enumeration determines whether keyframes are placed automatically by + * the encoder or whether this behavior is disabled. Older releases of this + * SDK were implemented such that VPX_KF_FIXED meant keyframes were disabled. + * This name is confusing for this behavior, so the new symbols to be used + * are VPX_KF_AUTO and VPX_KF_DISABLED. + */ + enum vpx_kf_mode { + VPX_KF_FIXED, /**< deprecated, implies VPX_KF_DISABLED */ + VPX_KF_AUTO, /**< Encoder determines optimal placement automatically */ + VPX_KF_DISABLED = 0 /**< Encoder does not place keyframes. */ + }; + + + /*!\brief Encoded Frame Flags + * + * This type indicates a bitfield to be passed to vpx_codec_encode(), defining + * per-frame boolean values. By convention, bits common to all codecs will be + * named VPX_EFLAG_*, and bits specific to an algorithm will be named + * /algo/_eflag_*. The lower order 16 bits are reserved for common use. + */ + typedef long vpx_enc_frame_flags_t; +#define VPX_EFLAG_FORCE_KF (1<<0) /**< Force this frame to be a keyframe */ + + + /*!\brief Encoder configuration structure + * + * This structure contains the encoder settings that have common representations + * across all codecs. This doesn't imply that all codecs support all features, + * however. + */ + typedef struct vpx_codec_enc_cfg { + /* + * generic settings (g) + */ + + /*!\brief Algorithm specific "usage" value + * + * Algorithms may define multiple values for usage, which may convey the + * intent of how the application intends to use the stream. If this value + * is non-zero, consult the documentation for the codec to determine its + * meaning. + */ + unsigned int g_usage; + + + /*!\brief Maximum number of threads to use + * + * For multi-threaded implementations, use no more than this number of + * threads. The codec may use fewer threads than allowed. The value + * 0 is equivalent to the value 1. + */ + unsigned int g_threads; + + + /*!\brief Bitstream profile to use + * + * Some codecs support a notion of multiple bitstream profiles. Typically + * this maps to a set of features that are turned on or off. Often the + * profile to use is determined by the features of the intended decoder. + * Consult the documentation for the codec to determine the valid values + * for this parameter, or set to zero for a sane default. + */ + unsigned int g_profile; /**< profile of bitstream to use */ + + + + /*!\brief Width of the frame + * + * This value identifies the presentation resolution of the frame, + * in pixels. Note that the frames passed as input to the encoder must + * have this resolution. Frames will be presented by the decoder in this + * resolution, independent of any spatial resampling the encoder may do. + */ + unsigned int g_w; + + + /*!\brief Height of the frame + * + * This value identifies the presentation resolution of the frame, + * in pixels. Note that the frames passed as input to the encoder must + * have this resolution. Frames will be presented by the decoder in this + * resolution, independent of any spatial resampling the encoder may do. + */ + unsigned int g_h; + + /*!\brief Bit-depth of the codec + * + * This value identifies the bit_depth of the codec, + * Only certain bit-depths are supported as identified in the + * vpx_bit_depth_t enum. + */ + vpx_bit_depth_t g_bit_depth; + + /*!\brief Bit-depth of the input frames + * + * This value identifies the bit_depth of the input frames in bits. + * Note that the frames passed as input to the encoder must have + * this bit-depth. + */ + unsigned int g_input_bit_depth; + + /*!\brief Stream timebase units + * + * Indicates the smallest interval of time, in seconds, used by the stream. + * For fixed frame rate material, or variable frame rate material where + * frames are timed at a multiple of a given clock (ex: video capture), + * the \ref RECOMMENDED method is to set the timebase to the reciprocal + * of the frame rate (ex: 1001/30000 for 29.970 Hz NTSC). This allows the + * pts to correspond to the frame number, which can be handy. For + * re-encoding video from containers with absolute time timestamps, the + * \ref RECOMMENDED method is to set the timebase to that of the parent + * container or multimedia framework (ex: 1/1000 for ms, as in FLV). + */ + struct vpx_rational g_timebase; + + + /*!\brief Enable error resilient modes. + * + * The error resilient bitfield indicates to the encoder which features + * it should enable to take measures for streaming over lossy or noisy + * links. + */ + vpx_codec_er_flags_t g_error_resilient; + + + /*!\brief Multi-pass Encoding Mode + * + * This value should be set to the current phase for multi-pass encoding. + * For single pass, set to #VPX_RC_ONE_PASS. + */ + enum vpx_enc_pass g_pass; + + + /*!\brief Allow lagged encoding + * + * If set, this value allows the encoder to consume a number of input + * frames before producing output frames. This allows the encoder to + * base decisions for the current frame on future frames. This does + * increase the latency of the encoding pipeline, so it is not appropriate + * in all situations (ex: realtime encoding). + * + * Note that this is a maximum value -- the encoder may produce frames + * sooner than the given limit. Set this value to 0 to disable this + * feature. + */ + unsigned int g_lag_in_frames; + + + /* + * rate control settings (rc) + */ + + /*!\brief Temporal resampling configuration, if supported by the codec. + * + * Temporal resampling allows the codec to "drop" frames as a strategy to + * meet its target data rate. This can cause temporal discontinuities in + * the encoded video, which may appear as stuttering during playback. This + * trade-off is often acceptable, but for many applications is not. It can + * be disabled in these cases. + * + * Note that not all codecs support this feature. All vpx VPx codecs do. + * For other codecs, consult the documentation for that algorithm. + * + * This threshold is described as a percentage of the target data buffer. + * When the data buffer falls below this percentage of fullness, a + * dropped frame is indicated. Set the threshold to zero (0) to disable + * this feature. + */ + unsigned int rc_dropframe_thresh; + + + /*!\brief Enable/disable spatial resampling, if supported by the codec. + * + * Spatial resampling allows the codec to compress a lower resolution + * version of the frame, which is then upscaled by the encoder 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_allowed; + + /*!\brief Internal coded frame width. + * + * If spatial resampling is enabled this specifies the width of the + * encoded frame. + */ + unsigned int rc_scaled_width; + + /*!\brief Internal coded frame height. + * + * If spatial resampling is enabled this specifies the height of the + * encoded frame. + */ + unsigned int rc_scaled_height; + + /*!\brief Spatial resampling up watermark. + * + * This threshold is described as a percentage of the target data buffer. + * When the data buffer rises above this percentage of fullness, the + * encoder will step up to a higher resolution version of the frame. + */ + unsigned int rc_resize_up_thresh; + + + /*!\brief Spatial resampling down watermark. + * + * This threshold is described as a percentage of the target data buffer. + * When the data buffer falls below this percentage of fullness, the + * encoder will step down to a lower resolution version of the frame. + */ + unsigned int rc_resize_down_thresh; + + + /*!\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 vpx_rc_mode rc_end_usage; + + + /*!\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_ + |