/*****************************************************************************
* x264.h: x264 public header
*****************************************************************************
- * Copyright (C) 2003-2011 x264 project
+ * Copyright (C) 2003-2015 x264 project
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Loren Merritt <lorenm@u.washington.edu>
#ifndef X264_X264_H
#define X264_X264_H
-#if !defined(_STDINT_H) && !defined(_STDINT_H_) && \
- !defined(_INTTYPES_H) && !defined(_INTTYPES_H_)
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(_STDINT_H) && !defined(_STDINT_H_) && !defined(_STDINT_H_INCLUDED) && !defined(_STDINT) &&\
+ !defined(_SYS_STDINT_H_) && !defined(_INTTYPES_H) && !defined(_INTTYPES_H_) && !defined(_INTTYPES)
# ifdef _MSC_VER
# pragma message("You must include stdint.h or inttypes.h before x264.h")
# else
#include "x264_config.h"
-#define X264_BUILD 120
+#define X264_BUILD 148
+
+/* Application developers planning to link against a shared library version of
+ * libx264 from a Microsoft Visual Studio or similar development environment
+ * will need to define X264_API_IMPORTS before including this header.
+ * This clause does not apply to MinGW, similar development environments, or non
+ * Windows platforms. */
+#ifdef X264_API_IMPORTS
+#define X264_API __declspec(dllimport)
+#else
+#define X264_API
+#endif
/* x264_t:
* opaque handler for encoder */
* All data returned in an x264_nal_t, including the data in p_payload, is no longer
* valid after the next call to x264_encoder_encode. Thus it must be used or copied
* before calling x264_encoder_encode or x264_encoder_headers again. */
-typedef struct
+typedef struct x264_nal_t
{
int i_ref_idc; /* nal_priority_e */
int i_type; /* nal_unit_type_e */
int i_first_mb; /* If this NAL is a slice, the index of the first MB in the slice. */
int i_last_mb; /* If this NAL is a slice, the index of the last MB in the slice. */
- /* Size of payload in bytes. */
+ /* Size of payload (including any padding) in bytes. */
int i_payload;
/* If param->b_annexb is set, Annex-B bytestream with startcode.
* Otherwise, startcode is replaced with a 4-byte size.
* This size is the size used in mp4/similar muxing; it is equal to i_payload-4 */
uint8_t *p_payload;
+
+ /* Size of padding in bytes. */
+ int i_padding;
} x264_nal_t;
/****************************************************************************
* Encoder parameters
****************************************************************************/
-/* CPU flags
- */
-#define X264_CPU_CACHELINE_32 0x0000001 /* avoid memory loads that span the border between two cachelines */
-#define X264_CPU_CACHELINE_64 0x0000002 /* 32/64 is the size of a cacheline in bytes */
-#define X264_CPU_ALTIVEC 0x0000004
-#define X264_CPU_MMX 0x0000008
-#define X264_CPU_MMX2 0x0000010 /* MMX2 aka MMXEXT aka ISSE */
+/* CPU flags */
+
+/* x86 */
+#define X264_CPU_CMOV 0x0000001
+#define X264_CPU_MMX 0x0000002
+#define X264_CPU_MMX2 0x0000004 /* MMX2 aka MMXEXT aka ISSE */
#define X264_CPU_MMXEXT X264_CPU_MMX2
-#define X264_CPU_SSE 0x0000020
-#define X264_CPU_SSE2 0x0000040
-#define X264_CPU_SSE2_IS_SLOW 0x0000080 /* avoid most SSE2 functions on Athlon64 */
-#define X264_CPU_SSE2_IS_FAST 0x0000100 /* a few functions are only faster on Core2 and Phenom */
-#define X264_CPU_SSE3 0x0000200
-#define X264_CPU_SSSE3 0x0000400
-#define X264_CPU_SHUFFLE_IS_FAST 0x0000800 /* Penryn, Nehalem, and Phenom have fast shuffle units */
-#define X264_CPU_STACK_MOD4 0x0001000 /* if stack is only mod4 and not mod16 */
-#define X264_CPU_SSE4 0x0002000 /* SSE4.1 */
-#define X264_CPU_SSE42 0x0004000 /* SSE4.2 */
-#define X264_CPU_SSE_MISALIGN 0x0008000 /* Phenom support for misaligned SSE instruction arguments */
-#define X264_CPU_LZCNT 0x0010000 /* Phenom support for "leading zero count" instruction. */
-#define X264_CPU_ARMV6 0x0020000
-#define X264_CPU_NEON 0x0040000 /* ARM NEON */
-#define X264_CPU_FAST_NEON_MRC 0x0080000 /* Transfer from NEON to ARM register is fast (Cortex-A9) */
-#define X264_CPU_SLOW_CTZ 0x0100000 /* BSR/BSF x86 instructions are really slow on some CPUs */
-#define X264_CPU_SLOW_ATOM 0x0200000 /* The Atom just sucks */
-#define X264_CPU_AVX 0x0400000 /* AVX support: requires OS support even if YMM registers
- * aren't used. */
-#define X264_CPU_XOP 0x0800000 /* AMD XOP */
-#define X264_CPU_FMA4 0x1000000 /* AMD FMA4 */
-
-/* Analyse flags
- */
+#define X264_CPU_SSE 0x0000008
+#define X264_CPU_SSE2 0x0000010
+#define X264_CPU_SSE3 0x0000020
+#define X264_CPU_SSSE3 0x0000040
+#define X264_CPU_SSE4 0x0000080 /* SSE4.1 */
+#define X264_CPU_SSE42 0x0000100 /* SSE4.2 */
+#define X264_CPU_LZCNT 0x0000200 /* Phenom support for "leading zero count" instruction. */
+#define X264_CPU_AVX 0x0000400 /* AVX support: requires OS support even if YMM registers aren't used. */
+#define X264_CPU_XOP 0x0000800 /* AMD XOP */
+#define X264_CPU_FMA4 0x0001000 /* AMD FMA4 */
+#define X264_CPU_FMA3 0x0002000 /* FMA3 */
+#define X264_CPU_AVX2 0x0004000 /* AVX2 */
+#define X264_CPU_BMI1 0x0008000 /* BMI1 */
+#define X264_CPU_BMI2 0x0010000 /* BMI2 */
+/* x86 modifiers */
+#define X264_CPU_CACHELINE_32 0x0020000 /* avoid memory loads that span the border between two cachelines */
+#define X264_CPU_CACHELINE_64 0x0040000 /* 32/64 is the size of a cacheline in bytes */
+#define X264_CPU_SSE2_IS_SLOW 0x0080000 /* avoid most SSE2 functions on Athlon64 */
+#define X264_CPU_SSE2_IS_FAST 0x0100000 /* a few functions are only faster on Core2 and Phenom */
+#define X264_CPU_SLOW_SHUFFLE 0x0200000 /* The Conroe has a slow shuffle unit (relative to overall SSE performance) */
+#define X264_CPU_STACK_MOD4 0x0400000 /* if stack is only mod4 and not mod16 */
+#define X264_CPU_SLOW_CTZ 0x0800000 /* BSR/BSF x86 instructions are really slow on some CPUs */
+#define X264_CPU_SLOW_ATOM 0x1000000 /* The Atom is terrible: slow SSE unaligned loads, slow
+ * SIMD multiplies, slow SIMD variable shifts, slow pshufb,
+ * cacheline split penalties -- gather everything here that
+ * isn't shared by other CPUs to avoid making half a dozen
+ * new SLOW flags. */
+#define X264_CPU_SLOW_PSHUFB 0x2000000 /* such as on the Intel Atom */
+#define X264_CPU_SLOW_PALIGNR 0x4000000 /* such as on the AMD Bobcat */
+
+/* PowerPC */
+#define X264_CPU_ALTIVEC 0x0000001
+
+/* ARM and AArch64 */
+#define X264_CPU_ARMV6 0x0000001
+#define X264_CPU_NEON 0x0000002 /* ARM NEON */
+#define X264_CPU_FAST_NEON_MRC 0x0000004 /* Transfer from NEON to ARM register is fast (Cortex-A9) */
+#define X264_CPU_ARMV8 0x0000008
+
+/* MIPS */
+#define X264_CPU_MSA 0x0000001 /* MIPS MSA */
+
+/* Analyse flags */
#define X264_ANALYSE_I4x4 0x0001 /* Analyse i4x4 */
#define X264_ANALYSE_I8x8 0x0002 /* Analyse i8x8 (requires 8x8 transform) */
#define X264_ANALYSE_PSUB16x16 0x0010 /* Analyse p16x8, p8x16 and p8x8 */
#define X264_AQ_NONE 0
#define X264_AQ_VARIANCE 1
#define X264_AQ_AUTOVARIANCE 2
+#define X264_AQ_AUTOVARIANCE_BIASED 3
#define X264_B_ADAPT_NONE 0
#define X264_B_ADAPT_FAST 1
#define X264_B_ADAPT_TRELLIS 2
static const char * const x264_overscan_names[] = { "undef", "show", "crop", 0 };
static const char * const x264_vidformat_names[] = { "component", "pal", "ntsc", "secam", "mac", "undef", 0 };
static const char * const x264_fullrange_names[] = { "off", "on", 0 };
-static const char * const x264_colorprim_names[] = { "", "bt709", "undef", "", "bt470m", "bt470bg", "smpte170m", "smpte240m", "film", 0 };
-static const char * const x264_transfer_names[] = { "", "bt709", "undef", "", "bt470m", "bt470bg", "smpte170m", "smpte240m", "linear", "log100", "log316", 0 };
-static const char * const x264_colmatrix_names[] = { "GBR", "bt709", "undef", "", "fcc", "bt470bg", "smpte170m", "smpte240m", "YCgCo", 0 };
+static const char * const x264_colorprim_names[] = { "", "bt709", "undef", "", "bt470m", "bt470bg", "smpte170m", "smpte240m", "film", "bt2020", 0 };
+static const char * const x264_transfer_names[] = { "", "bt709", "undef", "", "bt470m", "bt470bg", "smpte170m", "smpte240m", "linear", "log100", "log316",
+ "iec61966-2-4", "bt1361e", "iec61966-2-1", "bt2020-10", "bt2020-12", 0 };
+static const char * const x264_colmatrix_names[] = { "GBR", "bt709", "undef", "", "fcc", "bt470bg", "smpte170m", "smpte240m", "YCgCo", "bt2020nc", "bt2020c", 0 };
static const char * const x264_nal_hrd_names[] = { "none", "vbr", "cbr", 0 };
/* Colorspace type */
#define X264_CSP_I420 0x0001 /* yuv 4:2:0 planar */
#define X264_CSP_YV12 0x0002 /* yvu 4:2:0 planar */
#define X264_CSP_NV12 0x0003 /* yuv 4:2:0, with one y plane and one packed u+v */
-#define X264_CSP_I422 0x0004 /* yuv 4:2:2 planar */
-#define X264_CSP_YV16 0x0005 /* yvu 4:2:2 planar */
-#define X264_CSP_NV16 0x0006 /* yuv 4:2:2, with one y plane and one packed u+v */
-#define X264_CSP_I444 0x0007 /* yuv 4:4:4 planar */
-#define X264_CSP_YV24 0x0008 /* yvu 4:4:4 planar */
-#define X264_CSP_BGR 0x0009 /* packed bgr 24bits */
-#define X264_CSP_BGRA 0x000a /* packed bgr 32bits */
-#define X264_CSP_RGB 0x000b /* packed rgb 24bits */
-#define X264_CSP_MAX 0x000c /* end of list */
+#define X264_CSP_NV21 0x0004 /* yuv 4:2:0, with one y plane and one packed v+u */
+#define X264_CSP_I422 0x0005 /* yuv 4:2:2 planar */
+#define X264_CSP_YV16 0x0006 /* yvu 4:2:2 planar */
+#define X264_CSP_NV16 0x0007 /* yuv 4:2:2, with one y plane and one packed u+v */
+#define X264_CSP_V210 0x0008 /* 10-bit yuv 4:2:2 packed in 32 */
+#define X264_CSP_I444 0x0009 /* yuv 4:4:4 planar */
+#define X264_CSP_YV24 0x000a /* yvu 4:4:4 planar */
+#define X264_CSP_BGR 0x000b /* packed bgr 24bits */
+#define X264_CSP_BGRA 0x000c /* packed bgr 32bits */
+#define X264_CSP_RGB 0x000d /* packed rgb 24bits */
+#define X264_CSP_MAX 0x000e /* end of list */
#define X264_CSP_VFLIP 0x1000 /* the csp is vertically flipped */
#define X264_CSP_HIGH_DEPTH 0x2000 /* the csp has a depth of 16 bits per pixel component */
#define X264_TYPE_BREF 0x0004 /* Non-disposable B-frame */
#define X264_TYPE_B 0x0005
#define X264_TYPE_KEYFRAME 0x0006 /* IDR or I depending on b_open_gop option */
-#define IS_X264_TYPE_I(x) ((x)==X264_TYPE_I || (x)==X264_TYPE_IDR)
+#define IS_X264_TYPE_I(x) ((x)==X264_TYPE_I || (x)==X264_TYPE_IDR || (x)==X264_TYPE_KEYFRAME)
#define IS_X264_TYPE_B(x) ((x)==X264_TYPE_B || (x)==X264_TYPE_BREF)
/* Log level */
/* Zones: override ratecontrol or other options for specific sections of the video.
* See x264_encoder_reconfig() for which options can be changed.
* If zones overlap, whichever comes later in the list takes precedence. */
-typedef struct
+typedef struct x264_zone_t
{
int i_start, i_end; /* range of frame numbers */
int b_force_qp; /* whether to use qp vs bitrate factor */
{
/* CPU flags */
unsigned int cpu;
- int i_threads; /* encode multiple frames in parallel */
+ int i_threads; /* encode multiple frames in parallel */
+ int i_lookahead_threads; /* multiple threads for lookahead analysis */
int b_sliced_threads; /* Whether to use slice-based threading. */
int b_deterministic; /* whether to allow non-deterministic optimizations when threaded */
int b_cpu_independent; /* force canonical behavior rather than cpu-dependent optimal algorithms */
int i_bframe_pyramid; /* Keep some B-frames as references: 0=off, 1=strict hierarchical, 2=normal */
int b_open_gop;
int b_bluray_compat;
+ int i_avcintra_class;
int b_deblocking_filter;
int i_deblocking_filter_alphac0; /* [-6, 6] -6 light filter, 6 strong */
int b_constrained_intra;
int i_cqm_preset;
- char *psz_cqm_file; /* JM format */
+ char *psz_cqm_file; /* filename (in UTF-8) of CQM file, JM format */
uint8_t cqm_4iy[16]; /* used only if i_cqm_preset == X264_CQM_CUSTOM */
uint8_t cqm_4py[16];
uint8_t cqm_4ic[16];
void (*pf_log)( void *, int i_level, const char *psz, va_list );
void *p_log_private;
int i_log_level;
- int b_visualize;
- char *psz_dump_yuv; /* filename for reconstructed frames */
+ int b_full_recon; /* fully reconstruct frames, even when not necessary for encoding. Implied by psz_dump_yuv */
+ char *psz_dump_yuv; /* filename (in UTF-8) for reconstructed frames */
/* Encoder analyser parameters */
struct
float f_psy_trellis; /* Psy trellis strength */
int b_psy; /* Toggle all psy optimizations */
+ int b_mb_info; /* Use input mb_info data in x264_picture_t */
+ int b_mb_info_update; /* Update the values in mb_info according to the results of encoding. */
+
/* the deadzone size that will be used in luma quantization */
int i_luma_deadzone[2]; /* {inter, intra} */
float f_ip_factor;
float f_pb_factor;
+ /* VBV filler: force CBR VBV and use filler bytes to ensure hard-CBR.
+ * Implied by NAL-HRD CBR. */
+ int b_filler;
+
int i_aq_mode; /* psy adaptive QP. (X264_AQ_*) */
float f_aq_strength;
int b_mb_tree; /* Macroblock-tree ratecontrol. */
/* 2pass */
int b_stat_write; /* Enable stat writing in psz_stat_out */
- char *psz_stat_out;
+ char *psz_stat_out; /* output filename (in UTF-8) of the 2pass stats file */
int b_stat_read; /* Read stat from psz_stat_in and use it */
- char *psz_stat_in;
+ char *psz_stat_in; /* input filename (in UTF-8) of the 2pass stats file */
/* 2pass params (same as ffmpeg ones) */
float f_qcompress; /* 0.0 => cbr, 1.0 => constant qp */
int b_fake_interlaced;
+ /* Don't optimize header parameters based on video content, e.g. ensure that splitting an input video, compressing
+ * each part, and stitching them back together will result in identical SPS/PPS. This is necessary for stitching
+ * with container formats that don't allow multiple SPS/PPS. */
+ int b_stitchable;
+
+ int b_opencl; /* use OpenCL when available */
+ int i_opencl_device; /* specify count of GPU devices to skip, for CLI users */
+ void *opencl_device_id; /* pass explicit cl_device_id as void*, for API users */
+ char *psz_clbin_file; /* filename (in UTF-8) of the compiled OpenCL kernel cache file */
+
/* Slicing parameters */
int i_slice_max_size; /* Max size per slice in bytes; includes estimated NAL overhead. */
int i_slice_max_mbs; /* Max number of MBs per slice; overrides i_slice_count. */
+ int i_slice_min_mbs; /* Min number of MBs per slice */
int i_slice_count; /* Number of slices per frame: forces rectangular slices. */
+ int i_slice_count_max; /* Absolute cap on slices per frame; stops applying slice-max-size
+ * and slice-max-mbs if this is reached. */
/* Optional callback for freeing this x264_param_t when it is done being used.
* Only used when the x264_param_t sits in memory for an indefinite period of time,
* is done encoding.
*
* This callback MUST do the following in order to work correctly:
- * 1) Have available an output buffer of at least size nal->i_payload*3/2 + 5 + 16.
+ * 1) Have available an output buffer of at least size nal->i_payload*3/2 + 5 + 64.
* 2) Call x264_nal_encode( h, dst, nal ), where dst is the output buffer.
* After these steps, the content of nal is valid and can be used in the same way as if
* the NAL unit were output by x264_encoder_encode.
* the calling application is expected to acquire all output NALs through the callback.
*
* It is generally sensible to combine this callback with a use of slice-max-mbs or
- * slice-max-size. */
- void (*nalu_process) ( x264_t *h, x264_nal_t *nal );
+ * slice-max-size.
+ *
+ * The opaque pointer is the opaque pointer from the input frame associated with this
+ * NAL unit. This helps distinguish between nalu_process calls from different sources,
+ * e.g. if doing multiple encodes in one process.
+ */
+ void (*nalu_process) ( x264_t *h, x264_nal_t *nal, void *opaque );
} x264_param_t;
void x264_nal_encode( x264_t *h, uint8_t *dst, x264_nal_t *nal );
* H.264 level restriction information
****************************************************************************/
-typedef struct
+typedef struct x264_level_t
{
int level_idc;
int mbps; /* max macroblock processing rate (macroblocks/sec) */
int frame_size; /* max frame size (macroblocks) */
- int dpb; /* max decoded picture buffer (bytes) */
+ int dpb; /* max decoded picture buffer (mbs) */
int bitrate; /* max bitrate (kbit/sec) */
int cpb; /* max vbv buffer (kbit) */
int mv_range; /* max vertical mv component range (pixels) */
} x264_level_t;
/* all of the levels defined in the standard, terminated by .level_idc=0 */
-extern const x264_level_t x264_levels[];
+X264_API extern const x264_level_t x264_levels[];
/****************************************************************************
* Basic parameter handling functions
* (16-x264_bit_depth) bits to be zero.
* Note: The flag X264_CSP_HIGH_DEPTH must be used to specify the
* colorspace depth as well. */
-extern const int x264_bit_depth;
+X264_API extern const int x264_bit_depth;
/* x264_chroma_format:
* Specifies the chroma formats that x264 supports encoding. When this
* value is non-zero, then it represents a X264_CSP_* that is the only
* chroma format that x264 supports encoding. If the value is 0 then
* there are no restrictions. */
-extern const int x264_chroma_format;
+X264_API extern const int x264_chroma_format;
enum pic_struct_e
{
PIC_STRUCT_TRIPLE = 9, // triple frame
};
-typedef struct
+typedef struct x264_hrd_t
{
double cpb_initial_arrival_time;
double cpb_final_arrival_time;
* Payloads are written first in order of input, apart from in the case when HRD
* is enabled where payloads are written after the Buffering Period SEI. */
-typedef struct
+typedef struct x264_sei_payload_t
{
int payload_size;
int payload_type;
uint8_t *payload;
} x264_sei_payload_t;
-typedef struct
+typedef struct x264_sei_t
{
int num_payloads;
x264_sei_payload_t *payloads;
void (*sei_free)( void* );
} x264_sei_t;
-typedef struct
+typedef struct x264_image_t
{
int i_csp; /* Colorspace */
int i_plane; /* Number of image planes */
uint8_t *plane[4]; /* Pointers to each plane */
} x264_image_t;
-typedef struct
+typedef struct x264_image_properties_t
{
+ /* All arrays of data here are ordered as follows:
+ * each array contains one offset per macroblock, in raster scan order. In interlaced
+ * mode, top-field MBs and bottom-field MBs are interleaved at the row level.
+ * Macroblocks are 16x16 blocks of pixels (with respect to the luma plane). For the
+ * purposes of calculating the number of macroblocks, width and height are rounded up to
+ * the nearest 16. If in interlaced mode, height is rounded up to the nearest 32 instead. */
+
/* In: an array of quantizer offsets to be applied to this image during encoding.
* These are added on top of the decisions made by x264.
* Offsets can be fractional; they are added before QPs are rounded to integer.
* Adaptive quantization must be enabled to use this feature. Behavior if quant
- * offsets differ between encoding passes is undefined.
- *
- * Array contains one offset per macroblock, in raster scan order. In interlaced
- * mode, top-field MBs and bottom-field MBs are interleaved at the row level. */
+ * offsets differ between encoding passes is undefined. */
float *quant_offsets;
/* In: optional callback to free quant_offsets when used.
* Useful if one wants to use a different quant_offset array for each frame. */
void (*quant_offsets_free)( void* );
+
+ /* In: optional array of flags for each macroblock.
+ * Allows specifying additional information for the encoder such as which macroblocks
+ * remain unchanged. Usable flags are listed below.
+ * x264_param_t.analyse.b_mb_info must be set to use this, since x264 needs to track
+ * extra data internally to make full use of this information.
+ *
+ * Out: if b_mb_info_update is set, x264 will update this array as a result of encoding.
+ *
+ * For "MBINFO_CONSTANT", it will remove this flag on any macroblock whose decoded
+ * pixels have changed. This can be useful for e.g. noting which areas of the
+ * frame need to actually be blitted. Note: this intentionally ignores the effects
+ * of deblocking for the current frame, which should be fine unless one needs exact
+ * pixel-perfect accuracy.
+ *
+ * Results for MBINFO_CONSTANT are currently only set for P-frames, and are not
+ * guaranteed to enumerate all blocks which haven't changed. (There may be false
+ * negatives, but no false positives.)
+ */
+ uint8_t *mb_info;
+ /* In: optional callback to free mb_info when used. */
+ void (*mb_info_free)( void* );
+
+ /* The macroblock is constant and remains unchanged from the previous frame. */
+ #define X264_MBINFO_CONSTANT (1<<0)
+ /* More flags may be added in the future. */
+
+ /* Out: SSIM of the the frame luma (if x264_param_t.b_ssim is set) */
+ double f_ssim;
+ /* Out: Average PSNR of the frame (if x264_param_t.b_psnr is set) */
+ double f_psnr_avg;
+ /* Out: PSNR of Y, U, and V (if x264_param_t.b_psnr is set) */
+ double f_psnr[3];
+
+ /* Out: Average effective CRF of the encoded frame */
+ double f_crf_avg;
} x264_image_properties_t;
-typedef struct
+typedef struct x264_picture_t
{
/* In: force picture type (if not auto)
* If x264 encoding parameters are violated in the forcing of picture types,
* x264 will correct the input picture type and log a warning.
- * The quality of frametype decisions may suffer if a great deal of fine-grained
- * mixing of auto and forced frametypes is done.
* Out: type of the picture encoded */
int i_type;
/* In: force quantizer for != X264_QP_AUTO */
of H.264 itself; in this case, the caller must force an IDR frame
if it needs the changed parameter to apply immediately. */
x264_param_t *param;
- /* In: raw data */
+ /* In: raw image data */
+ /* Out: reconstructed image data. x264 may skip part of the reconstruction process,
+ e.g. deblocking, in frames where it isn't necessary. To force complete
+ reconstruction, at a small speed cost, set b_full_recon. */
x264_image_t img;
- /* In: optional information to modify encoder decisions for this frame */
+ /* In: optional information to modify encoder decisions for this frame
+ * Out: information about the encoded frame */
x264_image_properties_t prop;
/* Out: HRD timing information. Output only when i_nal_hrd is set. */
x264_hrd_t hrd_timing;
* due to delay, this may not be the next frame passed to encoder_encode.
* if the change should apply to some particular frame, use x264_picture_t->param instead.
* returns 0 on success, negative on parameter validation error.
- * not all parameters can be changed; see the actual function for a detailed breakdown. */
+ * not all parameters can be changed; see the actual function for a detailed breakdown.
+ *
+ * since not all parameters can be changed, moving from preset to preset may not always
+ * fully copy all relevant parameters, but should still work usably in practice. however,
+ * more so than for other presets, many of the speed shortcuts used in ultrafast cannot be
+ * switched out of; using reconfig to switch between ultrafast and other presets is not
+ * recommended without a more fine-grained breakdown of parameters to take this into account. */
int x264_encoder_reconfig( x264_t *, x264_param_t * );
/* x264_encoder_parameters:
* copies the current internal set of parameters to the pointer provided
/* x264_encoder_headers:
* return the SPS and PPS that will be used for the whole stream.
* *pi_nal is the number of NAL units outputted in pp_nal.
+ * returns the number of bytes in the returned NALs.
* returns negative on error.
* the payloads of all output NALs are guaranteed to be sequential in memory. */
int x264_encoder_headers( x264_t *, x264_nal_t **pp_nal, int *pi_nal );
/* x264_encoder_encode:
* encode one picture.
* *pi_nal is the number of NAL units outputted in pp_nal.
- * returns negative on error, zero if no NAL units returned.
+ * returns the number of bytes in the returned NALs.
+ * returns negative on error and zero if no NAL units returned.
* the payloads of all output NALs are guaranteed to be sequential in memory. */
int x264_encoder_encode( x264_t *, x264_nal_t **pp_nal, int *pi_nal, x264_picture_t *pic_in, x264_picture_t *pic_out );
/* x264_encoder_close:
* Returns 0 on success, negative on failure. */
int x264_encoder_invalidate_reference( x264_t *, int64_t pts );
+#ifdef __cplusplus
+}
+#endif
+
#endif
projects / x264 / blobdiff