/* * Generic DCT based hybrid video encoder * Copyright (c) 2000, 2001, 2002 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
int y_dc_scale, c_dc_scale; int ac_pred; int block_last_index[12]; ///< last non zero coefficient in block int h263_aic; ///< Advanced INTRA Coding (AIC)
/* scantables */
ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce the cache usage
/* WARNING: changes above this line require updates to hardcoded
* offsets used in ASM. */
struct AVCodecContext *avctx; /* The following pointer is intended for codecs sharing code
* between decoder and encoder and in need of a common context to do so. */ void *private_ctx; /* the following parameters must be initialized before encoding */ int width, height;///< picture size. must be a multiple of 16 int gop_size; int intra_only; ///< if true, only intra pictures are generated
int64_t bit_rate; ///< wanted bit rate enum OutputFormat out_format; ///< output format int h263_pred; ///< use MPEG-4/H.263 ac/dc predictions int pb_frame; ///< PB-frame mode (0 = none, 1 = base, 2 = improved)
/* the following codec id fields are deprecated in favor of codec_id */ int h263_plus; ///< H.263+ headers int h263_flv; ///< use flv H.263 header
enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */ int fixed_qscale; ///< fixed qscale if non zero int encoding; ///< true if we are encoding (vs decoding) int max_b_frames; ///< max number of B-frames for encoding int luma_elim_threshold; int chroma_elim_threshold; int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag /* the following fields are managed internally by the encoder */
/* sequence parameters */ int context_initialized; int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else int picture_number; //FIXME remove, unclear definition int picture_in_gop_number; ///< 0-> first pic in gop, ... int mb_width, mb_height; ///< number of MBs horizontally & vertically int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication) int mb_num; ///< number of MBs of a picture
ptrdiff_t linesize; ///< line size, in bytes, may be different from width
ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width struct AVRefStructPool *picture_pool; ///< Pool for MPVPictures
MPVPicture **input_picture;///< next pictures on display order for encoding
MPVPicture **reordered_input_picture; ///< pointer to the next pictures in coded order for encoding
BufferPoolContext buffer_pools;
int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_send_frame() /** * pts difference between the first and second input frame, used for
* calculating dts of the first frame when there's a delay */
int64_t dts_delta; /** * reordered pts to be used as dts for the next output frame when there's
* a delay */
int64_t reordered_pts;
/** bit output */
PutBitContext pb;
int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) struct MpegEncContext *thread_context[MAX_THREADS]; int slice_context_count; ///< number of used thread_contexts
/** * copy of the previous picture structure. * note, linesize & data, might not match the previous picture (for field pictures)
*/
MPVWorkPicture last_pic;
/** * copy of the next picture structure. * note, linesize & data, might not match the next picture (for field pictures)
*/
MPVWorkPicture next_pic;
/** * Reference to the source picture for encoding. * note, linesize & data, might not match the source picture (for field pictures)
*/
AVFrame *new_pic;
/** * copy of the current picture structure. * note, linesize & data, might not match the current picture (for field pictures)
*/
MPVWorkPicture cur_pic;
int skipped_last_frame; int last_dc[3]; ///< last DC values for MPEG-1
int16_t *dc_val_base;
int16_t *dc_val[3]; ///< used for MPEG-4 DC prediction, all 3 arrays must be continuous const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (H.263)
uint8_t *coded_block_base;
uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
int16_t (*ac_val_base)[16];
int16_t (*ac_val[3])[16]; ///< used for MPEG-4 AC prediction, all 3 arrays must be continuous int mb_skipped; ///< MUST BE SET only during DECODING
uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
and used for B-frame encoding & decoding (contains skip table of next P-frame) */
uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
ScratchpadContext sc;
int qscale; ///< QP int chroma_qscale; ///< chroma QP unsignedint lambda; ///< Lagrange multiplier used in rate distortion unsignedint lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT int *lambda_table; int adaptive_quant; ///< use adaptive quantization int dquant; ///< qscale difference to prev qscale int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ... int vbv_delay; int last_pict_type; //FIXME removes int last_non_b_pict_type; ///< used for MPEG-4 gmc B-frames & ratecontrol int droppable; int last_lambda_for[5]; ///< last lambda for a specific pict type int skipdct; ///< skip dct and code zero residual
/* motion compensation */ int unrestricted_mv; ///< mv can point outside of the coded picture int h263_long_vectors; ///< use horrible H.263v1 long vector mode
BlockDSPContext bdsp;
FDCTDSPContext fdsp;
H264ChromaContext h264chroma;
HpelDSPContext hdsp;
IDCTDSPContext idsp;
MpegvideoEncDSPContext mpvencdsp;
PixblockDSPContext pdsp;
QpelDSPContext qdsp;
VideoDSPContext vdsp;
H263DSPContext h263dsp; int f_code; ///< forward MV resolution int b_code; ///< backward MV resolution for B-frames (MPEG-4)
int16_t (*p_mv_table_base)[2];
int16_t (*b_forw_mv_table_base)[2];
int16_t (*b_back_mv_table_base)[2];
int16_t (*b_bidir_forw_mv_table_base)[2];
int16_t (*b_bidir_back_mv_table_base)[2];
int16_t (*b_direct_mv_table_base)[2];
int16_t (*p_field_mv_table_base)[2];
int16_t (*b_field_mv_table_base)[2];
int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) P-frame encoding
int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode B-frame encoding
int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode B-frame encoding
int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding
int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding
int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode B-frame encoding
int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced P-frame encoding
int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced B-frame encoding
uint8_t (*p_field_select_table[2]); ///< Only the first element is allocated
uint8_t (*b_field_select_table[2][2]); ///< Only the first element is allocated
/* The following fields are encoder-only */
uint16_t *mb_var; ///< Table for MB variances
uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
uint8_t *mb_mean; ///< Table for MB luminance
int64_t mb_var_sum; ///< sum of MB variance for current frame
int64_t mc_mb_var_sum; ///< motion compensated MB variance for current frame
uint64_t encoding_error[MPV_MAX_PLANES];
int motion_est; ///< ME algorithm int me_penalty_compensation; int me_pre; ///< prepass for motion estimation int mv_dir; #define MV_DIR_FORWARD 1 #define MV_DIR_BACKWARD 2 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (MPEG-4) int mv_type; #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb #define MV_TYPE_8X8 1 ///< 4 vectors (H.263, MPEG-4 4MV) #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors /**motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend on type third " : 0 = x, 1 = y
*/ int mv[2][4][2]; int field_select[2][2]; int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4 const uint8_t *fcode_tab; ///< smallest fcode needed for each MV
int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
MotionEstContext me;
int no_rounding; /**< apply no rounding to motion compensation (MPEG-4, msmpeg4, ...)
for B-frames rounding mode is always 0 */
/* macroblock layer */ int mb_x, mb_y; int mb_skip_run; int mb_intra;
uint16_t *mb_type; ///< Table for candidate MB types for encoding (defines in mpegvideoenc.h)
int block_index[6]; ///< index to current MB in block based arrays with edges int block_wrap[6];
uint8_t *dest[3];
int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
/** matrix transmitted in the bitstream */
uint16_t intra_matrix[64];
uint16_t chroma_intra_matrix[64];
uint16_t inter_matrix[64];
uint16_t chroma_inter_matrix[64];
int intra_quant_bias; ///< bias for the quantizer int inter_quant_bias; ///< bias for the quantizer int min_qcoeff; ///< minimum encodable coefficient int max_qcoeff; ///< maximum encodable coefficient int ac_esc_length; ///< num of bits needed to encode the longest esc
uint8_t *intra_ac_vlc_length;
uint8_t *intra_ac_vlc_last_length;
uint8_t *intra_chroma_ac_vlc_length;
uint8_t *intra_chroma_ac_vlc_last_length;
uint8_t *inter_ac_vlc_length;
uint8_t *inter_ac_vlc_last_length;
uint8_t *luma_dc_vlc_length;
int coded_score[12];
/** precomputed matrix (combine qscale and DCT renorm) */ int (*q_intra_matrix)[64]; int (*q_chroma_intra_matrix)[64]; int (*q_inter_matrix)[64]; /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
uint16_t (*q_intra_matrix16)[2][64];
uint16_t (*q_chroma_intra_matrix16)[2][64];
uint16_t (*q_inter_matrix16)[2][64];
/* noise reduction */ int (*dct_error_sum)[64]; int dct_count[2];
uint16_t (*dct_offset)[64];
/* bit rate control */
int64_t total_bits; int frame_bits; ///< bits used for the current frame int stuffing_bits; ///< bits used for stuffing int next_lambda; ///< next lambda used for retrying to encode a frame
RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
/* statistics, used for 2-pass encoding */ int mv_bits; int header_bits; int i_tex_bits; int p_tex_bits; int i_count; int misc_bits; ///< cbp, mb_type int last_bits; ///< temp var used for calculating the above vars
/* error concealment / resync */ int resync_mb_x; ///< x position of last resync marker int resync_mb_y; ///< y position of last resync marker
GetBitContext last_resync_gb; ///< used to search for the next resync marker int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
/* H.263 specific */ int gob_index; int obmc; ///< overlapped block motion compensation int mb_info; ///< interval for outputting info about mb offsets as side data int prev_mb_info, last_mb_info;
uint8_t *mb_info_ptr; int mb_info_size; int ehc_mode;
/* H.263+ specific */ int umvplus; ///< == H.263+ && unrestricted_mv int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top int h263_slice_structured; int alt_inter_vlc; ///< alternative inter vlc int modified_quant; int loop_filter; int custom_pcf;
/* MPEG-4 specific */ int studio_profile; int dct_precision; ///< number of bits to represent the fractional part of time (encoder only) int time_increment_bits; int last_time_base; int time_base; ///< time in seconds of last I,P,S Frame
int64_t time; ///< time of current frame
int64_t last_non_b_time;
uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
uint16_t pb_time; ///< time distance between the last b and p,s,i frame
uint16_t pp_field_time;
uint16_t pb_field_time; ///< like above, just for interlaced int mcsel; int quarter_sample; ///< 1->qpel, 0->half pel ME/MC int data_partitioning; ///< data partitioning flag from header int partitioned_frame; ///< is current frame partitioned int low_delay; ///< no reordering needed / has no B-frames
PutBitContext tex_pb; ///< used for data partitioned VOPs
PutBitContext pb2; ///< used for data partitioned VOPs int mpeg_quant; int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG-4
/* divx specific, used to workaround (many) bugs in divx5 */ int divx_packed;
uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them int bitstream_buffer_size; unsignedint allocated_bitstream_buffer_size;
/* RV10 specific */ int rv10_version; ///< RV10 version: 0 or 3 int rv10_first_dc_coded[3];
/* MJPEG specific */ struct MJpegContext *mjpeg_ctx; int esc_pos;
/* MSMPEG4 specific */ int mv_table_index; int rl_table_index; int rl_chroma_table_index; int dc_table_index; int use_skip_mb_code; int slice_height; ///< in macroblocks int first_slice_line; ///< used in MPEG-4 too to handle resync markers int flipflop_rounding; enum {
MSMP4_UNUSED,
MSMP4_V1,
MSMP4_V2,
MSMP4_V3,
MSMP4_WMV1,
MSMP4_WMV2,
MSMP4_VC1, ///< for VC1 (image), WMV3 (image) and MSS2.
} msmpeg4_version; int per_mb_rl_table; int esc3_level_length; int esc3_run_length; int inter_intra_pred; int mspel;
/* decompression specific */
GetBitContext gb;
/* MPEG-1 specific */ int last_mv_dir; ///< last mv_dir, used for B-frame encoding int vbv_delay_pos; ///< offset of vbv_delay in the bitstream
/* MPEG-2-specific - I wished not to have to support this mess. */ int progressive_sequence; int mpeg_f_code[2][2];
// picture structure defines are loaded from mpegutils.h int picture_structure;
int intra_dc_precision; int frame_pred_frame_dct; int top_field_first; int concealment_motion_vectors; int q_scale_type; int brd_scale; int intra_vlc_format; int alternate_scan; int repeat_first_field; int chroma_420_type; int chroma_format; #define CHROMA_420 1 #define CHROMA_422 2 #define CHROMA_444 3 int chroma_x_shift;//depend on pix_format, that depend on chroma_format int chroma_y_shift;
int progressive_frame; int full_pel[2]; int interlaced_dct; int first_field; ///< is 1 for the first field of a field picture 0 otherwise
/* RTP specific */ int rtp_mode; int rtp_payload_size;
uint8_t *ptr_lastgob;
int16_t (*block)[64]; ///< points to one of the following blocks
int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block int (*decode_mb)(struct MpegEncContext *s, int16_t block[12][64]); // used by some codecs to avoid a switch()
#define SLICE_OK 0 #define SLICE_ERROR -1 #define SLICE_END -2 ///<end marker found #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
int16_t *block/*align 16*/, int n, int qscale); void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
int16_t *block/*align 16*/, int n, int qscale); void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
int16_t *block/*align 16*/, int n, int qscale); void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
int16_t *block/*align 16*/, int n, int qscale); void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
int16_t *block/*align 16*/, int n, int qscale); void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
int16_t *block/*align 16*/, int n, int qscale); void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)
int16_t *block/*align 16*/, int n, int qscale); void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)
int16_t *block/*align 16*/, int n, int qscale); int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow); void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
int mpv_flags; ///< flags set by private options int quantizer_noise_shaping;
me_cmp_func ildct_cmp[2]; ///< 0 = intra, 1 = non-intra
me_cmp_func n_sse_cmp[2]; ///< either SSE or NSSE cmp func
me_cmp_func sad_cmp[2];
me_cmp_func sse_cmp[2]; int (*sum_abs_dctelem)(const int16_t *block);
/** * ratecontrol qmin qmax limiting method * 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax.
*/ float rc_qsquish; float rc_qmod_amp; int rc_qmod_freq; float rc_initial_cplx; float rc_buffer_aggressivity; float border_masking; int lmin, lmax; int vbv_ignore_qmax;
char *rc_eq;
/* temp buffers for rate control */ float *cplx_tab, *bits_tab;
/* flag to indicate a reinitialization is required, e.g. after
* a frame size change */ int context_reinit;
ERContext er;
int error_rate;
/* temporary frames used by b_frame_strategy = 2 */
AVFrame *tmp_frames[MAX_B_FRAMES + 2]; int b_frame_strategy; int b_sensitivity;
/* frame skip options for encoding */ int frame_skip_threshold; int frame_skip_factor; int frame_skip_exp; int frame_skip_cmp;
me_cmp_func frame_skip_cmp_fn;
int scenechange_threshold; int noise_reduction;
int intra_penalty;
} MpegEncContext;
/** * Set the given MpegEncContext to common defaults (same for encoding * and decoding). The changed fields will not depend upon the prior * state of the MpegEncContext.
*/ void ff_mpv_common_defaults(MpegEncContext *s);
int ff_mpv_common_init(MpegEncContext *s); void ff_mpv_common_init_arm(MpegEncContext *s); void ff_mpv_common_init_axp(MpegEncContext *s); void ff_mpv_common_init_neon(MpegEncContext *s); void ff_mpv_common_init_ppc(MpegEncContext *s); void ff_mpv_common_init_x86(MpegEncContext *s); void ff_mpv_common_init_mips(MpegEncContext *s); /** * Initialize an MpegEncContext's thread contexts. Presumes that * slice_context_count is already set and that all the fields * that are freed/reset in free_duplicate_context() are NULL.
*/ int ff_mpv_init_duplicate_contexts(MpegEncContext *s); /** * Initialize and allocates MpegEncContext fields dependent on the resolution.
*/ int ff_mpv_init_context_frame(MpegEncContext *s); /** * Frees and resets MpegEncContext fields depending on the resolution * as well as the slice thread contexts. * Is used during resolution changes to avoid a full reinitialization of the * codec.
*/ void ff_mpv_free_context_frame(MpegEncContext *s);
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