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Diffstat (limited to 'thirdparties/mac/include/vpx/vpx_encoder.h')
| -rwxr-xr-x | thirdparties/mac/include/vpx/vpx_encoder.h | 1409 |
1 files changed, 699 insertions, 710 deletions
diff --git a/thirdparties/mac/include/vpx/vpx_encoder.h b/thirdparties/mac/include/vpx/vpx_encoder.h index 239036e..749531e 100755 --- a/thirdparties/mac/include/vpx/vpx_encoder.h +++ b/thirdparties/mac/include/vpx/vpx_encoder.h @@ -46,75 +46,74 @@ extern "C" { /*!\deprecated Use #VPX_TS_MAX_LAYERS instead. */ #define MAX_LAYERS VPX_TS_MAX_LAYERS - /*!\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 - */ +/*!\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 (3 + 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. - */ +/*! \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. - */ +/*! 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 - /*! \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. - */ +/*! \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. */ - /*!\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 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 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; +/*!\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 @@ -124,13 +123,13 @@ extern "C" { #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; +/*!\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 @@ -142,645 +141,635 @@ extern "C" { 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_PSNR_PKT, /**< PSNR statistics for this frame */ - VPX_CODEC_CUSTOM_PKT = 256 /**< Algorithm extensions */ - }; +/*!\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_PSNR_PKT, /**< PSNR statistics for this frame */ + 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 +/*!\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 + 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 + 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 */ - struct vpx_fixed_buf twopass_stats; /**< data for two-pass 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 */ - struct vpx_fixed_buf raw; /**< data for arbitrary packets */ + } frame; /**< data for compressed frame packet */ + struct vpx_fixed_buf twopass_stats; /**< data for two-pass 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 */ + struct vpx_fixed_buf raw; /**< data for arbitrary packets */ - /* 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 */ + /* 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 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 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 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 /**< Constant Quality (CQ) 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 /**< Constant Quality (CQ) 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 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; +/*!\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 +/*!\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 * - * This structure contains the encoder settings that have common representations - * across all codecs. This doesn't imply that all codecs support all features, - * however. + * 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. */ - typedef struct vpx_codec_enc_cfg - { - /* - * generic settings (g) - */ + unsigned int g_usage; - /*!\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 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 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 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 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 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 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 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; + /*!\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; - /* - * rate control settings (rc) - */ + /*!\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; - /*!\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; + /* + * rate control settings (rc) + */ - /*!\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 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 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 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 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 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 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 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 Two-pass stats buffer. - * - * A buffer containing all of the stats packets produced in the first - * pass, concatenated. - */ - struct vpx_fixed_buf rc_twopass_stats_in; + /*!\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 Target data rate - * - * Target bandwidth to use for this stream, in kilobits per second. - */ - unsigned int rc_target_bitrate; + /*!\brief Two-pass stats buffer. + * + * A buffer containing all of the stats packets produced in the first + * pass, concatenated. + */ + struct vpx_fixed_buf rc_twopass_stats_in; - /* - * quantizer settings - */ + /*!\brief Target data rate + * + * Target bandwidth to use for this stream, in kilobits per second. + */ + unsigned int rc_target_bitrate; - /*!\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; + /* + * quantizer settings + */ - /*!\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; + /*!\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; - /* - * bitrate tolerance - */ + /*!\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; - /*!\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; + /* + * bitrate tolerance + */ - /* - * decoder buffer model parameters - */ + /*!\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 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 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; - /*!\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; + /* + * decoder buffer model parameters + */ - /*!\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; + /*!\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; - /* - * 2 pass rate control parameters - */ + /*!\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 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 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; - /*!\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; + /* + * 2 pass rate control parameters + */ - /*!\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; + /*!\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) */ - /* - * keyframing settings (kf) - */ + /*!\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 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 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; - /*!\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; + /* + * keyframing settings (kf) + */ - /*!\brief Keyframe maximum interval - * - * This value, expressed as a number of frames, forces the encoder to code - * a keyframe if one has not been coded in the last kf_max_dist frames. - * A value of 0 implies all frames will be keyframes. Set kf_min_dist - * equal to kf_max_dist for a fixed interval. - */ - unsigned int kf_max_dist; + /*!\brief 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; - /* - * Temporal scalability settings (ts) - */ - /*!\brief Number of coding layers - * - * This value specifies the number of coding layers to be used. - */ - unsigned int ts_number_layers; + /*!\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 Target bitrate for each layer - * - * These values specify the target coding bitrate for each coding layer. - */ - unsigned int ts_target_bitrate[VPX_TS_MAX_LAYERS]; - /*!\brief Frame rate decimation factor for each layer - * - * These values specify the frame rate decimation factors to apply - * to each layer. - */ - unsigned int ts_rate_decimator[VPX_TS_MAX_LAYERS]; - - /*!\brief Length of the sequence defining frame layer membership - * - * This value specifies the length of the sequence that defines the - * membership of frames to layers. For example, if ts_periodicity=8 then - * 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 coding layers - * - * This array defines the membership of frames to coding layers. For a - * 2-layer encoding that assigns even numbered frames to one layer (0) - * and odd numbered frames to a second 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]; - } vpx_codec_enc_cfg_t; /**< alias for struct vpx_codec_enc_cfg */ + /*!\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; + /* + * Temporal scalability settings (ts) + */ - /*!\brief Initialize an encoder instance + /*!\brief Number of coding layers * - * 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. + * This value specifies the number of coding layers to be used. + */ + unsigned int ts_number_layers; + + /*!\brief Target bitrate for each layer * - * In XMA mode (activated by setting VPX_CODEC_USE_XMA in the flags - * parameter), the storage pointed to by the cfg parameter must be - * kept readable and stable until all memory maps have been set. + * These values specify the target coding bitrate for each coding layer. + */ + unsigned int ts_target_bitrate[VPX_TS_MAX_LAYERS]; + + /*!\brief Frame rate decimation factor for each layer * - * \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. + * These values specify the frame rate decimation factors to apply + * to each layer. */ - vpx_codec_err_t vpx_codec_enc_init_ver(vpx_codec_ctx_t *ctx, - vpx_codec_iface_t *iface, - vpx_codec_enc_cfg_t *cfg, - vpx_codec_flags_t flags, - int ver); + unsigned int ts_rate_decimator[VPX_TS_MAX_LAYERS]; + /*!\brief Length of the sequence defining frame layer membership + * + * This value specifies the length of the sequence that defines the + * membership of frames to layers. For example, if ts_periodicity=8 then + * frames are assigned to coding layers with a repeated sequence of + * length 8. + */ + unsigned int ts_periodicity; - /*!\brief Convenience macro for vpx_codec_enc_init_ver() + /*!\brief Template defining the membership of frames to coding layers * - * Ensures the ABI version parameter is properly set. + * This array defines the membership of frames to coding layers. For a + * 2-layer encoding that assigns even numbered frames to one layer (0) + * and odd numbered frames to a second 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]; +} vpx_codec_enc_cfg_t; /**< alias for struct vpx_codec_enc_cfg */ + + +/*!\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. + * + * In XMA mode (activated by setting VPX_CODEC_USE_XMA in the flags + * parameter), the storage pointed to by the cfg parameter must be + * kept readable and stable until all memory maps have been set. + * + * \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, + 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. - * - * In XMA mode (activated by setting VPX_CODEC_USE_XMA in the flags - * parameter), the storage pointed to by the cfg parameter must be - * kept readable and stable until all memory maps have been set. - * - * \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 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. + * + * In XMA mode (activated by setting VPX_CODEC_USE_XMA in the flags + * parameter), the storage pointed to by the cfg parameter must be + * kept readable and stable until all memory maps have been set. + * + * \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. - */ +/*!\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] usage End usage. Set to 0 or use codec specific values. - * - * \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 usage); +/*!\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] usage End usage. Set to 0 or use codec specific values. + * + * \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 usage); - /*!\brief Set or change configuration - * - * Reconfigures an encoder instance according to the given configuration. - * - * \param[in] ctx Pointer to this instance's context - * \param[in] cfg Configuration buffer to use - * - * \retval #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 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); +/*!\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 @@ -789,141 +778,141 @@ extern "C" { * 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 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 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); +/*!\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*/ +/*!@} - end defgroup encoder*/ #endif #ifdef __cplusplus |
