2 * Generic DCT based hybrid video encoder
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
4 * Copyright (c) 2002-2004 Michael Niedermayer
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #ifndef FFMPEG_MPEGVIDEO_H
29 #define FFMPEG_MPEGVIDEO_H
32 #include "bitstream.h"
33 #include "ratecontrol.h"
36 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
48 #define MPEG_BUF_SIZE (16 * 1024)
50 #define QMAT_SHIFT_MMX 16
58 #define MAX_PICTURE_COUNT 32
60 #define ME_MAP_SIZE 64
61 #define ME_MAP_SHIFT 3
62 #define ME_MAP_MV_BITS 11
64 /* run length table */
68 #define I_TYPE FF_I_TYPE ///< Intra
69 #define P_TYPE FF_P_TYPE ///< Predicted
70 #define B_TYPE FF_B_TYPE ///< Bi-dir predicted
71 #define S_TYPE FF_S_TYPE ///< S(GMC)-VOP MPEG4
72 #define SI_TYPE FF_SI_TYPE ///< Switching Intra
73 #define SP_TYPE FF_SP_TYPE ///< Switching Predicted
75 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
77 #define INPLACE_OFFSET 16
80 #define SEQ_END_CODE 0x000001b7
81 #define SEQ_START_CODE 0x000001b3
82 #define GOP_START_CODE 0x000001b8
83 #define PICTURE_START_CODE 0x00000100
84 #define SLICE_MIN_START_CODE 0x00000101
85 #define SLICE_MAX_START_CODE 0x000001af
86 #define EXT_START_CODE 0x000001b5
87 #define USER_START_CODE 0x000001b2
92 typedef struct Picture{
96 * halfpel luma planes.
98 uint8_t *interpolated[3];
99 int16_t (*motion_val_base[2])[2];
100 uint32_t *mb_type_base;
101 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
102 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
103 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
104 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
105 #define IS_INTRA(a) ((a)&7)
106 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
107 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
108 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
109 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
110 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
111 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
112 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
113 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
114 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
115 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
116 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
117 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
118 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
119 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
120 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
121 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
122 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
123 #define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0|MB_TYPE_P1L0)<<(2*(list)))) ///< does this mb use listX, note does not work if subMBs
124 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
126 int field_poc[2]; ///< h264 top/bottom POC
127 int poc; ///< h264 frame POC
128 int frame_num; ///< h264 frame_num (raw frame_num from slice header)
129 int pic_id; /**< h264 pic_num (short -> no wrap version of pic_num,
130 pic_num & max_pic_num; long -> long_pic_num) */
131 int long_ref; ///< 1->long term reference 0->short term reference
132 int ref_poc[2][16]; ///< h264 POCs of the frames used as reference
133 int ref_count[2]; ///< number of entries in ref_poc
135 int mb_var_sum; ///< sum of MB variance for current frame
136 int mc_mb_var_sum; ///< motion compensated MB variance for current frame
137 uint16_t *mb_var; ///< Table for MB variances
138 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
139 uint8_t *mb_mean; ///< Table for MB luminance
140 int32_t *mb_cmp_score; ///< Table for MB cmp scores, for mb decision FIXME remove
141 int b_frame_score; /* */
144 struct MpegEncContext;
147 * Motion estimation context.
149 typedef struct MotionEstContext{
150 AVCodecContext *avctx;
151 int skip; ///< set if ME is skipped for the current MB
152 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
153 int direct_basis_mv[4][2];
154 uint8_t *scratchpad; ///< data area for the ME algo, so that the ME does not need to malloc/free
159 uint32_t *map; ///< map to avoid duplicate evaluations
160 uint32_t *score_map; ///< map to store the scores
162 int pre_penalty_factor;
163 int penalty_factor; /*!< an estimate of the bits required to
164 code a given mv value, e.g. (1,0) takes
165 more bits than (0,0). We have to
166 estimate whether any reduction in
167 residual is worth the extra bits. */
168 int sub_penalty_factor;
169 int mb_penalty_factor;
173 int pre_pass; ///< = 1 for the pre pass
185 /* temp variables for picture complexity calculation */
186 int mc_mb_var_sum_temp;
188 int scene_change_score;
189 /* cmp, chroma_cmp;*/
190 op_pixels_func (*hpel_put)[4];
191 op_pixels_func (*hpel_avg)[4];
192 qpel_mc_func (*qpel_put)[16];
193 qpel_mc_func (*qpel_avg)[16];
194 uint8_t (*mv_penalty)[MAX_MV*2+1]; ///< amount of bits needed to encode a MV
195 uint8_t *current_mv_penalty;
196 int (*sub_motion_search)(struct MpegEncContext * s,
197 int *mx_ptr, int *my_ptr, int dmin,
198 int src_index, int ref_index,
205 typedef struct MpegEncContext {
206 struct AVCodecContext *avctx;
207 /* the following parameters must be initialized before encoding */
208 int width, height;///< picture size. must be a multiple of 16
210 int intra_only; ///< if true, only intra pictures are generated
211 int bit_rate; ///< wanted bit rate
212 enum OutputFormat out_format; ///< output format
213 int h263_pred; ///< use mpeg4/h263 ac/dc predictions
215 /* the following codec id fields are deprecated in favor of codec_id */
216 int h263_plus; ///< h263 plus headers
217 int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
218 int h263_flv; ///< use flv h263 header
220 enum CodecID codec_id; /* see CODEC_ID_xxx */
221 int fixed_qscale; ///< fixed qscale if non zero
222 int encoding; ///< true if we are encoding (vs decoding)
223 int flags; ///< AVCodecContext.flags (HQ, MV4, ...)
224 int flags2; ///< AVCodecContext.flags2
225 int max_b_frames; ///< max number of b-frames for encoding
226 int luma_elim_threshold;
227 int chroma_elim_threshold;
228 int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
229 int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
230 int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
231 int stream_codec_tag; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
232 /* the following fields are managed internally by the encoder */
237 /* sequence parameters */
238 int context_initialized;
239 int input_picture_number; ///< used to set pic->display_picture_number, should not be used for/by anything else
240 int coded_picture_number; ///< used to set pic->coded_picture_number, should not be used for/by anything else
241 int picture_number; //FIXME remove, unclear definition
242 int picture_in_gop_number; ///< 0-> first pic in gop, ...
243 int b_frames_since_non_b; ///< used for encoding, relative to not yet reordered input
244 int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
245 int mb_width, mb_height; ///< number of MBs horizontally & vertically
246 int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
247 int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
248 int b4_stride; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
249 int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
250 int mb_num; ///< number of MBs of a picture
251 int linesize; ///< line size, in bytes, may be different from width
252 int uvlinesize; ///< line size, for chroma in bytes, may be different from width
253 Picture *picture; ///< main picture buffer
254 Picture **input_picture; ///< next pictures on display order for encoding
255 Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
257 int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
258 int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
259 struct MpegEncContext *thread_context[MAX_THREADS];
262 * copy of the previous picture structure.
263 * note, linesize & data, might not match the previous picture (for field pictures)
265 Picture last_picture;
268 * copy of the next picture structure.
269 * note, linesize & data, might not match the next picture (for field pictures)
271 Picture next_picture;
274 * copy of the source picture structure for encoding.
275 * note, linesize & data, might not match the source picture (for field pictures)
280 * copy of the current picture structure.
281 * note, linesize & data, might not match the current picture (for field pictures)
283 Picture current_picture; ///< buffer to store the decompressed current picture
285 Picture *last_picture_ptr; ///< pointer to the previous picture.
286 Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
287 Picture *current_picture_ptr; ///< pointer to the current picture
288 uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
289 int last_dc[3]; ///< last DC values for MPEG1
290 int16_t *dc_val_base;
291 int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
292 int16_t dc_cache[4*5];
293 int y_dc_scale, c_dc_scale;
294 const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
295 const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
296 const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
297 uint8_t *coded_block_base;
298 uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
299 int16_t (*ac_val_base)[16];
300 int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
302 uint8_t *prev_pict_types; ///< previous picture types in bitstream order, used for mb skip
303 #define PREV_PICT_TYPES_BUFFER_SIZE 256
304 int mb_skipped; ///< MUST BE SET only during DECODING
305 uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
306 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
307 uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
308 uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
309 uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
310 uint8_t *allocated_edge_emu_buffer;
311 uint8_t *edge_emu_buffer; ///< points into the middle of allocated_edge_emu_buffer
312 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
313 uint8_t *obmc_scratchpad;
314 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
317 int chroma_qscale; ///< chroma QP
318 unsigned int lambda; ///< lagrange multipler used in rate distortion
319 unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
321 int adaptive_quant; ///< use adaptive quantization
322 int dquant; ///< qscale difference to prev qscale
323 int pict_type; ///< I_TYPE, P_TYPE, B_TYPE, ...
324 int last_pict_type; //FIXME removes
325 int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
327 int frame_rate_index;
328 int last_lambda_for[5]; ///< last lambda for a specific pict type
329 int skipdct; ///< skip dct and code zero residual
331 /* motion compensation */
332 int unrestricted_mv; ///< mv can point outside of the coded picture
333 int h263_long_vectors; ///< use horrible h263v1 long vector mode
334 int decode; ///< if 0 then decoding will be skipped (for encoding b frames for example)
336 DSPContext dsp; ///< pointers for accelerated dsp functions
337 int f_code; ///< forward MV resolution
338 int b_code; ///< backward MV resolution for B Frames (mpeg4)
339 int16_t (*p_mv_table_base)[2];
340 int16_t (*b_forw_mv_table_base)[2];
341 int16_t (*b_back_mv_table_base)[2];
342 int16_t (*b_bidir_forw_mv_table_base)[2];
343 int16_t (*b_bidir_back_mv_table_base)[2];
344 int16_t (*b_direct_mv_table_base)[2];
345 int16_t (*p_field_mv_table_base[2][2])[2];
346 int16_t (*b_field_mv_table_base[2][2][2])[2];
347 int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
348 int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
349 int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
350 int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
351 int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
352 int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
353 int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
354 int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
355 uint8_t (*p_field_select_table[2]);
356 uint8_t (*b_field_select_table[2][2]);
357 int me_method; ///< ME algorithm
359 #define MV_DIR_FORWARD 1
360 #define MV_DIR_BACKWARD 2
361 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
363 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
364 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
365 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
366 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
367 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
368 /**motion vectors for a macroblock
369 first coordinate : 0 = forward 1 = backward
370 second " : depend on type
371 third " : 0 = x, 1 = y
374 int field_select[2][2];
375 int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
376 uint8_t *fcode_tab; ///< smallest fcode needed for each MV
377 int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
381 int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
382 for b-frames rounding mode is always 0 */
384 int hurry_up; /**< when set to 1 during decoding, b frames will be skipped
385 when set to 2 idct/dequant will be skipped too */
387 /* macroblock layer */
391 uint16_t *mb_type; ///< Table for candidate MB types for encoding
392 #define CANDIDATE_MB_TYPE_INTRA 0x01
393 #define CANDIDATE_MB_TYPE_INTER 0x02
394 #define CANDIDATE_MB_TYPE_INTER4V 0x04
395 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
396 //#define MB_TYPE_GMC 0x10
398 #define CANDIDATE_MB_TYPE_DIRECT 0x10
399 #define CANDIDATE_MB_TYPE_FORWARD 0x20
400 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
401 #define CANDIDATE_MB_TYPE_BIDIR 0x80
403 #define CANDIDATE_MB_TYPE_INTER_I 0x100
404 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
405 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
406 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
408 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
410 int block_index[6]; ///< index to current MB in block based arrays with edges
414 int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
416 /** matrix transmitted in the bitstream */
417 uint16_t intra_matrix[64];
418 uint16_t chroma_intra_matrix[64];
419 uint16_t inter_matrix[64];
420 uint16_t chroma_inter_matrix[64];
421 #define QUANT_BIAS_SHIFT 8
422 int intra_quant_bias; ///< bias for the quantizer
423 int inter_quant_bias; ///< bias for the quantizer
424 int min_qcoeff; ///< minimum encodable coefficient
425 int max_qcoeff; ///< maximum encodable coefficient
426 int ac_esc_length; ///< num of bits needed to encode the longest esc
427 uint8_t *intra_ac_vlc_length;
428 uint8_t *intra_ac_vlc_last_length;
429 uint8_t *inter_ac_vlc_length;
430 uint8_t *inter_ac_vlc_last_length;
431 uint8_t *luma_dc_vlc_length;
432 uint8_t *chroma_dc_vlc_length;
433 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
437 /** precomputed matrix (combine qscale and DCT renorm) */
438 int (*q_intra_matrix)[64];
439 int (*q_inter_matrix)[64];
440 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
441 uint16_t (*q_intra_matrix16)[2][64];
442 uint16_t (*q_inter_matrix16)[2][64];
443 int block_last_index[12]; ///< last non zero coefficient in block
445 DECLARE_ALIGNED_8(ScanTable, intra_scantable);
446 ScanTable intra_h_scantable;
447 ScanTable intra_v_scantable;
448 ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
450 /* noise reduction */
451 int (*dct_error_sum)[64];
453 uint16_t (*dct_offset)[64];
455 void *opaque; ///< private data for the user
457 /* bit rate control */
460 int frame_bits; ///< bits used for the current frame
461 int next_lambda; ///< next lambda used for retrying to encode a frame
462 RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
464 /* statistics, used for 2-pass encoding */
473 int misc_bits; ///< cbp, mb_type
474 int last_bits; ///< temp var used for calculating the above vars
476 /* error concealment / resync */
478 uint8_t *error_status_table; ///< table of the error status of each MB
479 #define VP_START 1 ///< current MB is the first after a resync marker
488 int resync_mb_x; ///< x position of last resync marker
489 int resync_mb_y; ///< y position of last resync marker
490 GetBitContext last_resync_gb; ///< used to search for the next resync marker
491 int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
492 int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
493 int error_resilience;
495 ParseContext parse_context;
499 int obmc; ///< overlapped block motion compensation
501 /* H.263+ specific */
502 int umvplus; ///< == H263+ && unrestricted_mv
503 int h263_aic; ///< Advanded INTRA Coding (AIC)
504 int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
505 int h263_slice_structured;
506 int alt_inter_vlc; ///< alternative inter vlc
512 int time_increment_bits; ///< number of bits to represent the fractional part of time
514 int time_base; ///< time in seconds of last I,P,S Frame
515 int64_t time; ///< time of current frame
516 int64_t last_non_b_time;
517 uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
518 uint16_t pb_time; ///< time distance between the last b and p,s,i frame
519 uint16_t pp_field_time;
520 uint16_t pb_field_time; ///< like above, just for interlaced
522 int vol_sprite_usage;
527 int sprite_brightness_change;
528 int num_sprite_warping_points;
529 int real_sprite_warping_points;
530 int sprite_offset[2][2]; ///< sprite offset[isChroma][isMVY]
531 int sprite_delta[2][2]; ///< sprite_delta [isY][isMVY]
532 int sprite_shift[2]; ///< sprite shift [isChroma]
535 int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
538 int enhancement_type;
541 int aspect_ratio_info; //FIXME remove
542 int sprite_warping_accuracy;
543 int low_latency_sprite;
544 int data_partitioning; ///< data partitioning flag from header
545 int partitioned_frame; ///< is current frame partitioned
546 int rvlc; ///< reversible vlc
547 int resync_marker; ///< could this stream contain resync markers
548 int low_delay; ///< no reordering needed / has no b-frames
550 int vol_control_parameters; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
551 int intra_dc_threshold; ///< QP above whch the ac VLC should be used for intra dc
552 int use_intra_dc_vlc;
553 PutBitContext tex_pb; ///< used for data partitioned VOPs
554 PutBitContext pb2; ///< used for data partitioned VOPs
556 int t_frame; ///< time distance of first I -> B, used for interlaced b frames
557 int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
559 /* divx specific, used to workaround (many) bugs in divx5 */
563 uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
564 int bitstream_buffer_size;
565 unsigned int allocated_bitstream_buffer_size;
569 /* lavc specific stuff, used to workaround bugs in libavcodec */
573 int rv10_version; ///< RV10 version: 0 or 3
574 int rv10_first_dc_coded[3];
577 struct MJpegContext *mjpeg_ctx;
578 int mjpeg_vsample[3]; ///< vertical sampling factors, default = {2, 1, 1}
579 int mjpeg_hsample[3]; ///< horizontal sampling factors, default = {2, 1, 1}
581 /* MSMPEG4 specific */
584 int rl_chroma_table_index;
586 int use_skip_mb_code;
587 int slice_height; ///< in macroblocks
588 int first_slice_line; ///< used in mpeg4 too to handle resync markers
589 int flipflop_rounding;
590 int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
592 int esc3_level_length;
594 /** [mb_intra][isChroma][level][run][last] */
595 int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
596 int inter_intra_pred;
599 /* decompression specific */
603 int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
604 int last_mv_dir; ///< last mv_dir, used for b frame encoding
605 int broken_link; ///< no_output_of_prior_pics_flag
606 uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
608 /* MPEG2 specific - I wish I had not to support this mess. */
609 int progressive_sequence;
610 int mpeg_f_code[2][2];
611 int picture_structure;
613 #define PICT_TOP_FIELD 1
614 #define PICT_BOTTOM_FIELD 2
617 int intra_dc_precision;
618 int frame_pred_frame_dct;
620 int concealment_motion_vectors;
622 int intra_vlc_format;
624 int repeat_first_field;
630 int chroma_x_shift;//depend on pix_format, that depend on chroma_format
633 int progressive_frame;
637 int first_field; ///< is 1 for the first field of a field picture 0 otherwise
642 uint8_t *ptr_lastgob;
643 int swap_uv;//vcr2 codec is mpeg2 varint with UV swaped
646 DCTELEM (*block)[64]; ///< points to one of the following blocks
647 DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
648 int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
650 #define SLICE_ERROR -1
651 #define SLICE_END -2 ///<end marker found
652 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
654 void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
655 DCTELEM *block/*align 16*/, int n, int qscale);
656 void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
657 DCTELEM *block/*align 16*/, int n, int qscale);
658 void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
659 DCTELEM *block/*align 16*/, int n, int qscale);
660 void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
661 DCTELEM *block/*align 16*/, int n, int qscale);
662 void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
663 DCTELEM *block/*align 16*/, int n, int qscale);
664 void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
665 DCTELEM *block/*align 16*/, int n, int qscale);
666 void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
667 DCTELEM *block/*align 16*/, int n, int qscale);
668 void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
669 DCTELEM *block/*align 16*/, int n, int qscale);
670 void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
671 DCTELEM *block/*align 16*/, int n, int qscale);
672 void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
673 DCTELEM *block/*align 16*/, int n, int qscale);
674 int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
675 int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
676 void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
680 void MPV_decode_defaults(MpegEncContext *s);
681 int MPV_common_init(MpegEncContext *s);
682 void MPV_common_end(MpegEncContext *s);
683 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
684 int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
685 void MPV_frame_end(MpegEncContext *s);
686 int MPV_encode_init(AVCodecContext *avctx);
687 int MPV_encode_end(AVCodecContext *avctx);
688 int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
689 void MPV_common_init_mmx(MpegEncContext *s);
690 void MPV_common_init_axp(MpegEncContext *s);
691 void MPV_common_init_mlib(MpegEncContext *s);
692 void MPV_common_init_mmi(MpegEncContext *s);
693 void MPV_common_init_armv4l(MpegEncContext *s);
694 void MPV_common_init_altivec(MpegEncContext *s);
695 void ff_clean_intra_table_entries(MpegEncContext *s);
696 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
697 void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
698 int src_x, int src_y, int w, int h);
699 void ff_mpeg_flush(AVCodecContext *avctx);
700 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
701 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
702 int ff_find_unused_picture(MpegEncContext *s, int shared);
703 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
704 void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
705 const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
707 void ff_er_frame_start(MpegEncContext *s);
708 void ff_er_frame_end(MpegEncContext *s);
709 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
711 int ff_dct_common_init(MpegEncContext *s);
712 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
713 const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
715 void ff_init_block_index(MpegEncContext *s);
717 static inline void ff_update_block_index(MpegEncContext *s){
718 const int block_size= 8>>s->avctx->lowres;
720 s->block_index[0]+=2;
721 s->block_index[1]+=2;
722 s->block_index[2]+=2;
723 s->block_index[3]+=2;
726 s->dest[0]+= 2*block_size;
727 s->dest[1]+= block_size;
728 s->dest[2]+= block_size;
731 static inline int get_bits_diff(MpegEncContext *s){
732 const int bits= put_bits_count(&s->pb);
733 const int last= s->last_bits;
740 static inline int ff_h263_round_chroma(int x){
741 static const uint8_t h263_chroma_roundtab[16] = {
742 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
743 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
745 return h263_chroma_roundtab[x & 0xf] + (x >> 3);
749 void ff_estimate_p_frame_motion(MpegEncContext * s,
751 void ff_estimate_b_frame_motion(MpegEncContext * s,
753 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
754 void ff_fix_long_p_mvs(MpegEncContext * s);
755 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
756 int16_t (*mv_table)[2], int f_code, int type, int truncate);
757 void ff_init_me(MpegEncContext *s);
758 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
759 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
760 int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
761 int ref_mv_scale, int size, int h);
762 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
763 int ref_index, int size, int h, int add_rate);
766 extern const uint16_t ff_mpeg1_default_intra_matrix[64];
767 extern const uint16_t ff_mpeg1_default_non_intra_matrix[64];
768 extern const uint8_t ff_mpeg1_dc_scale_table[128];
769 extern const AVRational ff_frame_rate_tab[];
771 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
772 void mpeg1_encode_mb(MpegEncContext *s,
773 DCTELEM block[6][64],
774 int motion_x, int motion_y);
775 void ff_mpeg1_encode_init(MpegEncContext *s);
776 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
777 void ff_mpeg1_clean_buffers(MpegEncContext *s);
778 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
782 extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
783 extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
784 extern const uint8_t ff_aic_dc_scale_table[32];
785 extern const int16_t ff_mpeg4_default_intra_matrix[64];
786 extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
787 extern const uint8_t ff_h263_chroma_qscale_table[32];
788 extern const uint8_t ff_h263_loop_filter_strength[32];
791 void ff_h261_loop_filter(MpegEncContext *s);
792 void ff_h261_reorder_mb_index(MpegEncContext* s);
793 void ff_h261_encode_mb(MpegEncContext *s,
794 DCTELEM block[6][64],
795 int motion_x, int motion_y);
796 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
797 void ff_h261_encode_init(MpegEncContext *s);
798 int ff_h261_get_picture_format(int width, int height);
801 /* h263.c, h263dec.c */
802 int ff_h263_decode_init(AVCodecContext *avctx);
803 int ff_h263_decode_frame(AVCodecContext *avctx,
804 void *data, int *data_size,
805 const uint8_t *buf, int buf_size);
806 int ff_h263_decode_end(AVCodecContext *avctx);
807 void h263_encode_mb(MpegEncContext *s,
808 DCTELEM block[6][64],
809 int motion_x, int motion_y);
810 void mpeg4_encode_mb(MpegEncContext *s,
811 DCTELEM block[6][64],
812 int motion_x, int motion_y);
813 void h263_encode_picture_header(MpegEncContext *s, int picture_number);
814 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
815 void h263_encode_gob_header(MpegEncContext * s, int mb_line);
816 int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
818 void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
820 void ff_set_mpeg4_time(MpegEncContext * s);
821 void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
822 void h263_encode_init(MpegEncContext *s);
823 void h263_decode_init_vlc(MpegEncContext *s);
824 int h263_decode_picture_header(MpegEncContext *s);
825 int ff_h263_decode_gob_header(MpegEncContext *s);
826 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
827 void ff_h263_update_motion_val(MpegEncContext * s);
828 void ff_h263_loop_filter(MpegEncContext * s);
829 void ff_set_qscale(MpegEncContext * s, int qscale);
830 int ff_h263_decode_mba(MpegEncContext *s);
831 void ff_h263_encode_mba(MpegEncContext *s);
833 int intel_h263_decode_picture_header(MpegEncContext *s);
834 int flv_h263_decode_picture_header(MpegEncContext *s);
835 int ff_h263_decode_mb(MpegEncContext *s,
836 DCTELEM block[6][64]);
837 int ff_mpeg4_decode_mb(MpegEncContext *s,
838 DCTELEM block[6][64]);
839 int h263_get_picture_format(int width, int height);
840 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
841 void ff_mpeg4_clean_buffers(MpegEncContext *s);
842 void ff_mpeg4_stuffing(PutBitContext * pbc);
843 void ff_mpeg4_init_partitions(MpegEncContext *s);
844 void ff_mpeg4_merge_partitions(MpegEncContext *s);
845 void ff_clean_mpeg4_qscales(MpegEncContext *s);
846 void ff_clean_h263_qscales(MpegEncContext *s);
847 int ff_mpeg4_decode_partitions(MpegEncContext *s);
848 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
849 int ff_h263_resync(MpegEncContext *s);
850 int ff_h263_get_gob_height(MpegEncContext *s);
851 void ff_mpeg4_init_direct_mv(MpegEncContext *s);
852 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
853 void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
857 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
858 int rv_decode_dc(MpegEncContext *s, int n);
859 void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
863 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
864 void msmpeg4_encode_ext_header(MpegEncContext * s);
865 void msmpeg4_encode_mb(MpegEncContext * s,
866 DCTELEM block[6][64],
867 int motion_x, int motion_y);
868 int msmpeg4_decode_picture_header(MpegEncContext * s);
869 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
870 int ff_msmpeg4_decode_init(MpegEncContext *s);
871 void ff_msmpeg4_encode_init(MpegEncContext *s);
872 int ff_wmv2_decode_picture_header(MpegEncContext * s);
873 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
874 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
875 void ff_mspel_motion(MpegEncContext *s,
876 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
877 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
878 int motion_x, int motion_y, int h);
879 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
880 void ff_wmv2_encode_mb(MpegEncContext * s,
881 DCTELEM block[6][64],
882 int motion_x, int motion_y);
884 #endif /* FFMPEG_MPEGVIDEO_H */