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
24 * @file libavcodec/mpegvideo.h
28 #ifndef AVCODEC_MPEGVIDEO_H
29 #define AVCODEC_MPEGVIDEO_H
32 #include "bitstream.h"
33 #include "ratecontrol.h"
35 #include "mpeg12data.h"
38 #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 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
66 #define INPLACE_OFFSET 16
69 #define SEQ_END_CODE 0x000001b7
70 #define SEQ_START_CODE 0x000001b3
71 #define GOP_START_CODE 0x000001b8
72 #define PICTURE_START_CODE 0x00000100
73 #define SLICE_MIN_START_CODE 0x00000101
74 #define SLICE_MAX_START_CODE 0x000001af
75 #define EXT_START_CODE 0x000001b5
76 #define USER_START_CODE 0x000001b2
81 typedef struct Picture
{
85 * halfpel luma planes.
87 uint8_t *interpolated
[3];
88 int16_t (*motion_val_base
[2])[2];
89 uint32_t *mb_type_base
;
90 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
91 #define IS_INTRA4x4(a) ((a)&MB_TYPE_INTRA4x4)
92 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
93 #define IS_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
94 #define IS_INTRA(a) ((a)&7)
95 #define IS_INTER(a) ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
96 #define IS_SKIP(a) ((a)&MB_TYPE_SKIP)
97 #define IS_INTRA_PCM(a) ((a)&MB_TYPE_INTRA_PCM)
98 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
99 #define IS_DIRECT(a) ((a)&MB_TYPE_DIRECT2)
100 #define IS_GMC(a) ((a)&MB_TYPE_GMC)
101 #define IS_16X16(a) ((a)&MB_TYPE_16x16)
102 #define IS_16X8(a) ((a)&MB_TYPE_16x8)
103 #define IS_8X16(a) ((a)&MB_TYPE_8x16)
104 #define IS_8X8(a) ((a)&MB_TYPE_8x8)
105 #define IS_SUB_8X8(a) ((a)&MB_TYPE_16x16) //note reused
106 #define IS_SUB_8X4(a) ((a)&MB_TYPE_16x8) //note reused
107 #define IS_SUB_4X8(a) ((a)&MB_TYPE_8x16) //note reused
108 #define IS_SUB_4X4(a) ((a)&MB_TYPE_8x8) //note reused
109 #define IS_ACPRED(a) ((a)&MB_TYPE_ACPRED)
110 #define IS_QUANT(a) ((a)&MB_TYPE_QUANT)
111 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
112 #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
113 #define HAS_CBP(a) ((a)&MB_TYPE_CBP)
115 int field_poc
[2]; ///< h264 top/bottom POC
116 int poc
; ///< h264 frame POC
117 int frame_num
; ///< h264 frame_num (raw frame_num from slice header)
118 int pic_id
; /**< h264 pic_num (short -> no wrap version of pic_num,
119 pic_num & max_pic_num; long -> long_pic_num) */
120 int long_ref
; ///< 1->long term reference 0->short term reference
121 int ref_poc
[2][2][16]; ///< h264 POCs of the frames used as reference (FIXME need per slice)
122 int ref_count
[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
123 int mbaff
; ///< h264 1 -> MBAFF frame 0-> not MBAFF
125 int mb_var_sum
; ///< sum of MB variance for current frame
126 int mc_mb_var_sum
; ///< motion compensated MB variance for current frame
127 uint16_t *mb_var
; ///< Table for MB variances
128 uint16_t *mc_mb_var
; ///< Table for motion compensated MB variances
129 uint8_t *mb_mean
; ///< Table for MB luminance
130 int32_t *mb_cmp_score
; ///< Table for MB cmp scores, for mb decision FIXME remove
131 int b_frame_score
; /* */
134 struct MpegEncContext
;
137 * Motion estimation context.
139 typedef struct MotionEstContext
{
140 AVCodecContext
*avctx
;
141 int skip
; ///< set if ME is skipped for the current MB
142 int co_located_mv
[4][2]; ///< mv from last P-frame for direct mode ME
143 int direct_basis_mv
[4][2];
144 uint8_t *scratchpad
; ///< data area for the ME algo, so that the ME does not need to malloc/free
149 uint32_t *map
; ///< map to avoid duplicate evaluations
150 uint32_t *score_map
; ///< map to store the scores
152 int pre_penalty_factor
;
153 int penalty_factor
; /*!< an estimate of the bits required to
154 code a given mv value, e.g. (1,0) takes
155 more bits than (0,0). We have to
156 estimate whether any reduction in
157 residual is worth the extra bits. */
158 int sub_penalty_factor
;
159 int mb_penalty_factor
;
163 int pre_pass
; ///< = 1 for the pre pass
175 /* temp variables for picture complexity calculation */
176 int mc_mb_var_sum_temp
;
178 int scene_change_score
;
179 /* cmp, chroma_cmp;*/
180 op_pixels_func (*hpel_put
)[4];
181 op_pixels_func (*hpel_avg
)[4];
182 qpel_mc_func (*qpel_put
)[16];
183 qpel_mc_func (*qpel_avg
)[16];
184 uint8_t (*mv_penalty
)[MAX_MV
*2+1]; ///< amount of bits needed to encode a MV
185 uint8_t *current_mv_penalty
;
186 int (*sub_motion_search
)(struct MpegEncContext
* s
,
187 int *mx_ptr
, int *my_ptr
, int dmin
,
188 int src_index
, int ref_index
,
195 typedef struct MpegEncContext
{
196 struct AVCodecContext
*avctx
;
197 /* the following parameters must be initialized before encoding */
198 int width
, height
;///< picture size. must be a multiple of 16
200 int intra_only
; ///< if true, only intra pictures are generated
201 int bit_rate
; ///< wanted bit rate
202 enum OutputFormat out_format
; ///< output format
203 int h263_pred
; ///< use mpeg4/h263 ac/dc predictions
204 int pb_frame
; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
206 /* the following codec id fields are deprecated in favor of codec_id */
207 int h263_plus
; ///< h263 plus headers
208 int h263_msmpeg4
; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
209 int h263_flv
; ///< use flv h263 header
211 enum CodecID codec_id
; /* see CODEC_ID_xxx */
212 int fixed_qscale
; ///< fixed qscale if non zero
213 int encoding
; ///< true if we are encoding (vs decoding)
214 int flags
; ///< AVCodecContext.flags (HQ, MV4, ...)
215 int flags2
; ///< AVCodecContext.flags2
216 int max_b_frames
; ///< max number of b-frames for encoding
217 int luma_elim_threshold
;
218 int chroma_elim_threshold
;
219 int strict_std_compliance
; ///< strictly follow the std (MPEG4, ...)
220 int workaround_bugs
; ///< workaround bugs in encoders which cannot be detected automatically
221 int codec_tag
; ///< internal codec_tag upper case converted from avctx codec_tag
222 int stream_codec_tag
; ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
223 /* the following fields are managed internally by the encoder */
228 /* sequence parameters */
229 int context_initialized
;
230 int input_picture_number
; ///< used to set pic->display_picture_number, should not be used for/by anything else
231 int coded_picture_number
; ///< used to set pic->coded_picture_number, should not be used for/by anything else
232 int picture_number
; //FIXME remove, unclear definition
233 int picture_in_gop_number
; ///< 0-> first pic in gop, ...
234 int b_frames_since_non_b
; ///< used for encoding, relative to not yet reordered input
235 int64_t user_specified_pts
;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
236 int mb_width
, mb_height
; ///< number of MBs horizontally & vertically
237 int mb_stride
; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
238 int b8_stride
; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
239 int b4_stride
; ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
240 int h_edge_pos
, v_edge_pos
;///< horizontal / vertical position of the right/bottom edge (pixel replication)
241 int mb_num
; ///< number of MBs of a picture
242 int linesize
; ///< line size, in bytes, may be different from width
243 int uvlinesize
; ///< line size, for chroma in bytes, may be different from width
244 Picture
*picture
; ///< main picture buffer
245 Picture
**input_picture
; ///< next pictures on display order for encoding
246 Picture
**reordered_input_picture
; ///< pointer to the next pictures in codedorder for encoding
248 int start_mb_y
; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
249 int end_mb_y
; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
250 struct MpegEncContext
*thread_context
[MAX_THREADS
];
253 * copy of the previous picture structure.
254 * note, linesize & data, might not match the previous picture (for field pictures)
256 Picture last_picture
;
259 * copy of the next picture structure.
260 * note, linesize & data, might not match the next picture (for field pictures)
262 Picture next_picture
;
265 * copy of the source picture structure for encoding.
266 * note, linesize & data, might not match the source picture (for field pictures)
271 * copy of the current picture structure.
272 * note, linesize & data, might not match the current picture (for field pictures)
274 Picture current_picture
; ///< buffer to store the decompressed current picture
276 Picture
*last_picture_ptr
; ///< pointer to the previous picture.
277 Picture
*next_picture_ptr
; ///< pointer to the next picture (for bidir pred)
278 Picture
*current_picture_ptr
; ///< pointer to the current picture
279 uint8_t *visualization_buffer
[3]; //< temporary buffer vor MV visualization
280 int last_dc
[3]; ///< last DC values for MPEG1
281 int16_t *dc_val_base
;
282 int16_t *dc_val
[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
283 int16_t dc_cache
[4*5];
284 int y_dc_scale
, c_dc_scale
;
285 const uint8_t *y_dc_scale_table
; ///< qscale -> y_dc_scale table
286 const uint8_t *c_dc_scale_table
; ///< qscale -> c_dc_scale table
287 const uint8_t *chroma_qscale_table
; ///< qscale -> chroma_qscale (h263)
288 uint8_t *coded_block_base
;
289 uint8_t *coded_block
; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
290 int16_t (*ac_val_base
)[16];
291 int16_t (*ac_val
[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
293 uint8_t *prev_pict_types
; ///< previous picture types in bitstream order, used for mb skip
294 #define PREV_PICT_TYPES_BUFFER_SIZE 256
295 int mb_skipped
; ///< MUST BE SET only during DECODING
296 uint8_t *mbskip_table
; /**< used to avoid copy if macroblock skipped (for black regions for example)
297 and used for b-frame encoding & decoding (contains skip table of next P Frame) */
298 uint8_t *mbintra_table
; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
299 uint8_t *cbp_table
; ///< used to store cbp, ac_pred for partitioned decoding
300 uint8_t *pred_dir_table
; ///< used to store pred_dir for partitioned decoding
301 uint8_t *allocated_edge_emu_buffer
;
302 uint8_t *edge_emu_buffer
; ///< points into the middle of allocated_edge_emu_buffer
303 uint8_t *rd_scratchpad
; ///< scratchpad for rate distortion mb decision
304 uint8_t *obmc_scratchpad
;
305 uint8_t *b_scratchpad
; ///< scratchpad used for writing into write only buffers
308 int chroma_qscale
; ///< chroma QP
309 unsigned int lambda
; ///< lagrange multipler used in rate distortion
310 unsigned int lambda2
; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
312 int adaptive_quant
; ///< use adaptive quantization
313 int dquant
; ///< qscale difference to prev qscale
314 int pict_type
; ///< FF_I_TYPE, FF_P_TYPE, FF_B_TYPE, ...
315 int last_pict_type
; //FIXME removes
316 int last_non_b_pict_type
; ///< used for mpeg4 gmc b-frames & ratecontrol
318 int frame_rate_index
;
319 int last_lambda_for
[5]; ///< last lambda for a specific pict type
320 int skipdct
; ///< skip dct and code zero residual
322 /* motion compensation */
323 int unrestricted_mv
; ///< mv can point outside of the coded picture
324 int h263_long_vectors
; ///< use horrible h263v1 long vector mode
325 int decode
; ///< if 0 then decoding will be skipped (for encoding b frames for example)
327 DSPContext dsp
; ///< pointers for accelerated dsp functions
328 int f_code
; ///< forward MV resolution
329 int b_code
; ///< backward MV resolution for B Frames (mpeg4)
330 int16_t (*p_mv_table_base
)[2];
331 int16_t (*b_forw_mv_table_base
)[2];
332 int16_t (*b_back_mv_table_base
)[2];
333 int16_t (*b_bidir_forw_mv_table_base
)[2];
334 int16_t (*b_bidir_back_mv_table_base
)[2];
335 int16_t (*b_direct_mv_table_base
)[2];
336 int16_t (*p_field_mv_table_base
[2][2])[2];
337 int16_t (*b_field_mv_table_base
[2][2][2])[2];
338 int16_t (*p_mv_table
)[2]; ///< MV table (1MV per MB) p-frame encoding
339 int16_t (*b_forw_mv_table
)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
340 int16_t (*b_back_mv_table
)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
341 int16_t (*b_bidir_forw_mv_table
)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
342 int16_t (*b_bidir_back_mv_table
)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
343 int16_t (*b_direct_mv_table
)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
344 int16_t (*p_field_mv_table
[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
345 int16_t (*b_field_mv_table
[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
346 uint8_t (*p_field_select_table
[2]);
347 uint8_t (*b_field_select_table
[2][2]);
348 int me_method
; ///< ME algorithm
350 #define MV_DIR_FORWARD 1
351 #define MV_DIR_BACKWARD 2
352 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
354 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
355 #define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
356 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
357 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
358 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
359 /**motion vectors for a macroblock
360 first coordinate : 0 = forward 1 = backward
361 second " : depend on type
362 third " : 0 = x, 1 = y
365 int field_select
[2][2];
366 int last_mv
[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
367 uint8_t *fcode_tab
; ///< smallest fcode needed for each MV
368 int16_t direct_scale_mv
[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
372 int no_rounding
; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
373 for b-frames rounding mode is always 0 */
375 int hurry_up
; /**< when set to 1 during decoding, b frames will be skipped
376 when set to 2 idct/dequant will be skipped too */
378 /* macroblock layer */
382 uint16_t *mb_type
; ///< Table for candidate MB types for encoding
383 #define CANDIDATE_MB_TYPE_INTRA 0x01
384 #define CANDIDATE_MB_TYPE_INTER 0x02
385 #define CANDIDATE_MB_TYPE_INTER4V 0x04
386 #define CANDIDATE_MB_TYPE_SKIPPED 0x08
387 //#define MB_TYPE_GMC 0x10
389 #define CANDIDATE_MB_TYPE_DIRECT 0x10
390 #define CANDIDATE_MB_TYPE_FORWARD 0x20
391 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
392 #define CANDIDATE_MB_TYPE_BIDIR 0x80
394 #define CANDIDATE_MB_TYPE_INTER_I 0x100
395 #define CANDIDATE_MB_TYPE_FORWARD_I 0x200
396 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
397 #define CANDIDATE_MB_TYPE_BIDIR_I 0x800
399 #define CANDIDATE_MB_TYPE_DIRECT0 0x1000
401 int block_index
[6]; ///< index to current MB in block based arrays with edges
405 int *mb_index2xy
; ///< mb_index -> mb_x + mb_y*mb_stride
407 /** matrix transmitted in the bitstream */
408 uint16_t intra_matrix
[64];
409 uint16_t chroma_intra_matrix
[64];
410 uint16_t inter_matrix
[64];
411 uint16_t chroma_inter_matrix
[64];
412 #define QUANT_BIAS_SHIFT 8
413 int intra_quant_bias
; ///< bias for the quantizer
414 int inter_quant_bias
; ///< bias for the quantizer
415 int min_qcoeff
; ///< minimum encodable coefficient
416 int max_qcoeff
; ///< maximum encodable coefficient
417 int ac_esc_length
; ///< num of bits needed to encode the longest esc
418 uint8_t *intra_ac_vlc_length
;
419 uint8_t *intra_ac_vlc_last_length
;
420 uint8_t *inter_ac_vlc_length
;
421 uint8_t *inter_ac_vlc_last_length
;
422 uint8_t *luma_dc_vlc_length
;
423 uint8_t *chroma_dc_vlc_length
;
424 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
428 /** precomputed matrix (combine qscale and DCT renorm) */
429 int (*q_intra_matrix
)[64];
430 int (*q_inter_matrix
)[64];
431 /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
432 uint16_t (*q_intra_matrix16
)[2][64];
433 uint16_t (*q_inter_matrix16
)[2][64];
434 int block_last_index
[12]; ///< last non zero coefficient in block
436 DECLARE_ALIGNED_8(ScanTable
, intra_scantable
);
437 ScanTable intra_h_scantable
;
438 ScanTable intra_v_scantable
;
439 ScanTable inter_scantable
; ///< if inter == intra then intra should be used to reduce tha cache usage
441 /* noise reduction */
442 int (*dct_error_sum
)[64];
444 uint16_t (*dct_offset
)[64];
446 void *opaque
; ///< private data for the user
448 /* bit rate control */
451 int frame_bits
; ///< bits used for the current frame
452 int next_lambda
; ///< next lambda used for retrying to encode a frame
453 RateControlContext rc_context
; ///< contains stuff only accessed in ratecontrol.c
455 /* statistics, used for 2-pass encoding */
464 int misc_bits
; ///< cbp, mb_type
465 int last_bits
; ///< temp var used for calculating the above vars
467 /* error concealment / resync */
469 uint8_t *error_status_table
; ///< table of the error status of each MB
470 #define VP_START 1 ///< current MB is the first after a resync marker
479 int resync_mb_x
; ///< x position of last resync marker
480 int resync_mb_y
; ///< y position of last resync marker
481 GetBitContext last_resync_gb
; ///< used to search for the next resync marker
482 int mb_num_left
; ///< number of MBs left in this video packet (for partitioned Slices only)
483 int next_p_frame_damaged
; ///< set if the next p frame is damaged, to avoid showing trashed b frames
484 int error_recognition
;
486 ParseContext parse_context
;
490 int obmc
; ///< overlapped block motion compensation
491 int showed_packed_warning
; ///< flag for having shown the warning about divxs invalid b frames
493 /* H.263+ specific */
494 int umvplus
; ///< == H263+ && unrestricted_mv
495 int h263_aic
; ///< Advanded INTRA Coding (AIC)
496 int h263_aic_dir
; ///< AIC direction: 0 = left, 1 = top
497 int h263_slice_structured
;
498 int alt_inter_vlc
; ///< alternative inter vlc
504 int time_increment_bits
; ///< number of bits to represent the fractional part of time
506 int time_base
; ///< time in seconds of last I,P,S Frame
507 int64_t time
; ///< time of current frame
508 int64_t last_non_b_time
;
509 uint16_t pp_time
; ///< time distance between the last 2 p,s,i frames
510 uint16_t pb_time
; ///< time distance between the last b and p,s,i frame
511 uint16_t pp_field_time
;
512 uint16_t pb_field_time
; ///< like above, just for interlaced
514 int vol_sprite_usage
;
519 int sprite_brightness_change
;
520 int num_sprite_warping_points
;
521 int real_sprite_warping_points
;
522 uint16_t sprite_traj
[4][2]; ///< sprite trajectory points
523 int sprite_offset
[2][2]; ///< sprite offset[isChroma][isMVY]
524 int sprite_delta
[2][2]; ///< sprite_delta [isY][isMVY]
525 int sprite_shift
[2]; ///< sprite shift [isChroma]
528 int quarter_sample
; ///< 1->qpel, 0->half pel ME/MC
531 int enhancement_type
;
534 int aspect_ratio_info
; //FIXME remove
535 int sprite_warping_accuracy
;
536 int low_latency_sprite
;
537 int data_partitioning
; ///< data partitioning flag from header
538 int partitioned_frame
; ///< is current frame partitioned
539 int rvlc
; ///< reversible vlc
540 int resync_marker
; ///< could this stream contain resync markers
541 int low_delay
; ///< no reordering needed / has no b-frames
543 int vol_control_parameters
; ///< does the stream contain the low_delay flag, used to workaround buggy encoders
544 int intra_dc_threshold
; ///< QP above whch the ac VLC should be used for intra dc
545 int use_intra_dc_vlc
;
546 PutBitContext tex_pb
; ///< used for data partitioned VOPs
547 PutBitContext pb2
; ///< used for data partitioned VOPs
549 int t_frame
; ///< time distance of first I -> B, used for interlaced b frames
550 int padding_bug_score
; ///< used to detect the VERY common padding bug in MPEG4
551 int cplx_estimation_trash_i
;
552 int cplx_estimation_trash_p
;
553 int cplx_estimation_trash_b
;
555 /* divx specific, used to workaround (many) bugs in divx5 */
559 uint8_t *bitstream_buffer
; //Divx 5.01 puts several frames in a single one, this is used to reorder them
560 int bitstream_buffer_size
;
561 unsigned int allocated_bitstream_buffer_size
;
565 /* lavc specific stuff, used to workaround bugs in libavcodec */
569 int rv10_version
; ///< RV10 version: 0 or 3
570 int rv10_first_dc_coded
[3];
573 struct MJpegContext
*mjpeg_ctx
;
574 int mjpeg_vsample
[3]; ///< vertical sampling factors, default = {2, 1, 1}
575 int mjpeg_hsample
[3]; ///< horizontal sampling factors, default = {2, 1, 1}
577 /* MSMPEG4 specific */
580 int rl_chroma_table_index
;
582 int use_skip_mb_code
;
583 int slice_height
; ///< in macroblocks
584 int first_slice_line
; ///< used in mpeg4 too to handle resync markers
585 int flipflop_rounding
;
586 int msmpeg4_version
; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
588 int esc3_level_length
;
590 /** [mb_intra][isChroma][level][run][last] */
591 int (*ac_stats
)[2][MAX_LEVEL
+1][MAX_RUN
+1][2];
592 int inter_intra_pred
;
595 /* decompression specific */
599 int gop_picture_number
; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
600 int last_mv_dir
; ///< last mv_dir, used for b frame encoding
601 int broken_link
; ///< no_output_of_prior_pics_flag
602 uint8_t *vbv_delay_ptr
; ///< pointer to vbv_delay in the bitstream
604 /* MPEG-2-specific - I wished not to have to support this mess. */
605 int progressive_sequence
;
606 int mpeg_f_code
[2][2];
607 int picture_structure
;
609 #define PICT_TOP_FIELD 1
610 #define PICT_BOTTOM_FIELD 2
613 int intra_dc_precision
;
614 int frame_pred_frame_dct
;
616 int concealment_motion_vectors
;
618 int intra_vlc_format
;
620 int repeat_first_field
;
626 int chroma_x_shift
;//depend on pix_format, that depend on chroma_format
629 int progressive_frame
;
633 int first_field
; ///< is 1 for the first field of a field picture 0 otherwise
638 uint8_t *ptr_lastgob
;
639 int swap_uv
; //vcr2 codec is an MPEG-2 variant with U and V swapped
640 DCTELEM (*pblocks
[12])[64];
642 DCTELEM (*block
)[64]; ///< points to one of the following blocks
643 DCTELEM (*blocks
)[8][64]; // for HQ mode we need to keep the best block
644 int (*decode_mb
)(struct MpegEncContext
*s
, DCTELEM block
[6][64]); // used by some codecs to avoid a switch()
646 #define SLICE_ERROR -1
647 #define SLICE_END -2 ///<end marker found
648 #define SLICE_NOEND -3 ///<no end marker or error found but mb count exceeded
650 void (*dct_unquantize_mpeg1_intra
)(struct MpegEncContext
*s
,
651 DCTELEM
*block
/*align 16*/, int n
, int qscale
);
652 void (*dct_unquantize_mpeg1_inter
)(struct MpegEncContext
*s
,
653 DCTELEM
*block
/*align 16*/, int n
, int qscale
);
654 void (*dct_unquantize_mpeg2_intra
)(struct MpegEncContext
*s
,
655 DCTELEM
*block
/*align 16*/, int n
, int qscale
);
656 void (*dct_unquantize_mpeg2_inter
)(struct MpegEncContext
*s
,
657 DCTELEM
*block
/*align 16*/, int n
, int qscale
);
658 void (*dct_unquantize_h263_intra
)(struct MpegEncContext
*s
,
659 DCTELEM
*block
/*align 16*/, int n
, int qscale
);
660 void (*dct_unquantize_h263_inter
)(struct MpegEncContext
*s
,
661 DCTELEM
*block
/*align 16*/, int n
, int qscale
);
662 void (*dct_unquantize_h261_intra
)(struct MpegEncContext
*s
,
663 DCTELEM
*block
/*align 16*/, int n
, int qscale
);
664 void (*dct_unquantize_h261_inter
)(struct MpegEncContext
*s
,
665 DCTELEM
*block
/*align 16*/, int n
, int qscale
);
666 void (*dct_unquantize_intra
)(struct MpegEncContext
*s
, // unquantizer to use (mpeg4 can use both)
667 DCTELEM
*block
/*align 16*/, int n
, int qscale
);
668 void (*dct_unquantize_inter
)(struct MpegEncContext
*s
, // unquantizer to use (mpeg4 can use both)
669 DCTELEM
*block
/*align 16*/, int n
, int qscale
);
670 int (*dct_quantize
)(struct MpegEncContext
*s
, DCTELEM
*block
/*align 16*/, int n
, int qscale
, int *overflow
);
671 int (*fast_dct_quantize
)(struct MpegEncContext
*s
, DCTELEM
*block
/*align 16*/, int n
, int qscale
, int *overflow
);
672 void (*denoise_dct
)(struct MpegEncContext
*s
, DCTELEM
*block
);
676 void MPV_decode_defaults(MpegEncContext
*s
);
677 int MPV_common_init(MpegEncContext
*s
);
678 void MPV_common_end(MpegEncContext
*s
);
679 void MPV_decode_mb(MpegEncContext
*s
, DCTELEM block
[12][64]);
680 int MPV_frame_start(MpegEncContext
*s
, AVCodecContext
*avctx
);
681 void MPV_frame_end(MpegEncContext
*s
);
682 int MPV_encode_init(AVCodecContext
*avctx
);
683 int MPV_encode_end(AVCodecContext
*avctx
);
684 int MPV_encode_picture(AVCodecContext
*avctx
, unsigned char *buf
, int buf_size
, void *data
);
685 void MPV_common_init_mmx(MpegEncContext
*s
);
686 void MPV_common_init_axp(MpegEncContext
*s
);
687 void MPV_common_init_mlib(MpegEncContext
*s
);
688 void MPV_common_init_mmi(MpegEncContext
*s
);
689 void MPV_common_init_arm(MpegEncContext
*s
);
690 void MPV_common_init_altivec(MpegEncContext
*s
);
691 void ff_clean_intra_table_entries(MpegEncContext
*s
);
692 void ff_draw_horiz_band(MpegEncContext
*s
, int y
, int h
);
693 void ff_mpeg_flush(AVCodecContext
*avctx
);
694 void ff_print_debug_info(MpegEncContext
*s
, AVFrame
*pict
);
695 void ff_write_quant_matrix(PutBitContext
*pb
, uint16_t *matrix
);
696 int ff_find_unused_picture(MpegEncContext
*s
, int shared
);
697 void ff_denoise_dct(MpegEncContext
*s
, DCTELEM
*block
);
698 void ff_update_duplicate_context(MpegEncContext
*dst
, MpegEncContext
*src
);
699 const uint8_t *ff_find_start_code(const uint8_t *p
, const uint8_t *end
, uint32_t *state
);
701 void ff_er_frame_start(MpegEncContext
*s
);
702 void ff_er_frame_end(MpegEncContext
*s
);
703 void ff_er_add_slice(MpegEncContext
*s
, int startx
, int starty
, int endx
, int endy
, int status
);
705 int ff_dct_common_init(MpegEncContext
*s
);
706 void ff_convert_matrix(DSPContext
*dsp
, int (*qmat
)[64], uint16_t (*qmat16
)[2][64],
707 const uint16_t *quant_matrix
, int bias
, int qmin
, int qmax
, int intra
);
709 void ff_init_block_index(MpegEncContext
*s
);
710 void ff_copy_picture(Picture
*dst
, Picture
*src
);
712 extern const enum PixelFormat ff_pixfmt_list_420
[];
713 extern const enum PixelFormat ff_hwaccel_pixfmt_list_420
[];
715 static inline void ff_update_block_index(MpegEncContext
*s
){
716 const int block_size
= 8>>s
->avctx
->lowres
;
718 s
->block_index
[0]+=2;
719 s
->block_index
[1]+=2;
720 s
->block_index
[2]+=2;
721 s
->block_index
[3]+=2;
724 s
->dest
[0]+= 2*block_size
;
725 s
->dest
[1]+= block_size
;
726 s
->dest
[2]+= block_size
;
729 static inline int get_bits_diff(MpegEncContext
*s
){
730 const int bits
= put_bits_count(&s
->pb
);
731 const int last
= s
->last_bits
;
738 static inline int ff_h263_round_chroma(int x
){
739 static const uint8_t h263_chroma_roundtab
[16] = {
740 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
741 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
743 return h263_chroma_roundtab
[x
& 0xf] + (x
>> 3);
747 void ff_estimate_p_frame_motion(MpegEncContext
* s
,
749 void ff_estimate_b_frame_motion(MpegEncContext
* s
,
751 int ff_get_best_fcode(MpegEncContext
* s
, int16_t (*mv_table
)[2], int type
);
752 void ff_fix_long_p_mvs(MpegEncContext
* s
);
753 void ff_fix_long_mvs(MpegEncContext
* s
, uint8_t *field_select_table
, int field_select
,
754 int16_t (*mv_table
)[2], int f_code
, int type
, int truncate
);
755 int ff_init_me(MpegEncContext
*s
);
756 int ff_pre_estimate_p_frame_motion(MpegEncContext
* s
, int mb_x
, int mb_y
);
757 int ff_epzs_motion_search(MpegEncContext
* s
, int *mx_ptr
, int *my_ptr
,
758 int P
[10][2], int src_index
, int ref_index
, int16_t (*last_mv
)[2],
759 int ref_mv_scale
, int size
, int h
);
760 int ff_get_mb_score(MpegEncContext
* s
, int mx
, int my
, int src_index
,
761 int ref_index
, int size
, int h
, int add_rate
);
764 extern const uint8_t ff_mpeg1_dc_scale_table
[128];
766 void mpeg1_encode_picture_header(MpegEncContext
*s
, int picture_number
);
767 void mpeg1_encode_mb(MpegEncContext
*s
,
768 DCTELEM block
[6][64],
769 int motion_x
, int motion_y
);
770 void ff_mpeg1_encode_init(MpegEncContext
*s
);
771 void ff_mpeg1_encode_slice_header(MpegEncContext
*s
);
772 void ff_mpeg1_clean_buffers(MpegEncContext
*s
);
773 int ff_mpeg1_find_frame_end(ParseContext
*pc
, const uint8_t *buf
, int buf_size
, AVCodecParserContext
*s
);
775 extern const uint8_t ff_mpeg4_y_dc_scale_table
[32];
776 extern const uint8_t ff_mpeg4_c_dc_scale_table
[32];
777 extern const uint8_t ff_aic_dc_scale_table
[32];
778 extern const int16_t ff_mpeg4_default_intra_matrix
[64];
779 extern const int16_t ff_mpeg4_default_non_intra_matrix
[64];
780 extern const uint8_t ff_h263_chroma_qscale_table
[32];
781 extern const uint8_t ff_h263_loop_filter_strength
[32];
784 void ff_h261_loop_filter(MpegEncContext
*s
);
785 void ff_h261_reorder_mb_index(MpegEncContext
* s
);
786 void ff_h261_encode_mb(MpegEncContext
*s
,
787 DCTELEM block
[6][64],
788 int motion_x
, int motion_y
);
789 void ff_h261_encode_picture_header(MpegEncContext
* s
, int picture_number
);
790 void ff_h261_encode_init(MpegEncContext
*s
);
791 int ff_h261_get_picture_format(int width
, int height
);
794 /* h263.c, h263dec.c */
795 int ff_h263_decode_init(AVCodecContext
*avctx
);
796 int ff_h263_decode_frame(AVCodecContext
*avctx
,
797 void *data
, int *data_size
,
799 int ff_h263_decode_end(AVCodecContext
*avctx
);
800 void h263_encode_mb(MpegEncContext
*s
,
801 DCTELEM block
[6][64],
802 int motion_x
, int motion_y
);
803 void mpeg4_encode_mb(MpegEncContext
*s
,
804 DCTELEM block
[6][64],
805 int motion_x
, int motion_y
);
806 void h263_encode_picture_header(MpegEncContext
*s
, int picture_number
);
807 void ff_flv_encode_picture_header(MpegEncContext
*s
, int picture_number
);
808 void h263_encode_gob_header(MpegEncContext
* s
, int mb_line
);
809 int16_t *h263_pred_motion(MpegEncContext
* s
, int block
, int dir
,
811 void mpeg4_pred_ac(MpegEncContext
* s
, DCTELEM
*block
, int n
,
813 void ff_set_mpeg4_time(MpegEncContext
* s
);
814 void mpeg4_encode_picture_header(MpegEncContext
*s
, int picture_number
);
815 void h263_encode_init(MpegEncContext
*s
);
816 void h263_decode_init_vlc(MpegEncContext
*s
);
817 int h263_decode_picture_header(MpegEncContext
*s
);
818 int ff_h263_decode_gob_header(MpegEncContext
*s
);
819 int ff_mpeg4_decode_picture_header(MpegEncContext
* s
, GetBitContext
*gb
);
820 void ff_h263_update_motion_val(MpegEncContext
* s
);
821 void ff_h263_loop_filter(MpegEncContext
* s
);
822 void ff_set_qscale(MpegEncContext
* s
, int qscale
);
823 int ff_h263_decode_mba(MpegEncContext
*s
);
824 void ff_h263_encode_mba(MpegEncContext
*s
);
826 int intel_h263_decode_picture_header(MpegEncContext
*s
);
827 int flv_h263_decode_picture_header(MpegEncContext
*s
);
828 int ff_h263_decode_mb(MpegEncContext
*s
,
829 DCTELEM block
[6][64]);
830 int ff_mpeg4_decode_mb(MpegEncContext
*s
,
831 DCTELEM block
[6][64]);
832 int h263_get_picture_format(int width
, int height
);
833 void ff_mpeg4_encode_video_packet_header(MpegEncContext
*s
);
834 void ff_mpeg4_clean_buffers(MpegEncContext
*s
);
835 void ff_mpeg4_stuffing(PutBitContext
* pbc
);
836 void ff_mpeg4_init_partitions(MpegEncContext
*s
);
837 void ff_mpeg4_merge_partitions(MpegEncContext
*s
);
838 void ff_clean_mpeg4_qscales(MpegEncContext
*s
);
839 void ff_clean_h263_qscales(MpegEncContext
*s
);
840 int ff_mpeg4_decode_partitions(MpegEncContext
*s
);
841 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext
*s
);
842 int ff_h263_resync(MpegEncContext
*s
);
843 const uint8_t *ff_h263_find_resync_marker(const uint8_t *p
, const uint8_t *end
);
844 int ff_h263_get_gob_height(MpegEncContext
*s
);
845 void ff_mpeg4_init_direct_mv(MpegEncContext
*s
);
846 int ff_mpeg4_set_direct_mv(MpegEncContext
*s
, int mx
, int my
);
847 void ff_h263_encode_motion(MpegEncContext
* s
, int val
, int f_code
);
851 void rv10_encode_picture_header(MpegEncContext
*s
, int picture_number
);
852 int rv_decode_dc(MpegEncContext
*s
, int n
);
853 void rv20_encode_picture_header(MpegEncContext
*s
, int picture_number
);
857 void msmpeg4_encode_picture_header(MpegEncContext
* s
, int picture_number
);
858 void msmpeg4_encode_ext_header(MpegEncContext
* s
);
859 void msmpeg4_encode_mb(MpegEncContext
* s
,
860 DCTELEM block
[6][64],
861 int motion_x
, int motion_y
);
862 int msmpeg4_decode_picture_header(MpegEncContext
* s
);
863 int msmpeg4_decode_ext_header(MpegEncContext
* s
, int buf_size
);
864 int ff_msmpeg4_decode_init(MpegEncContext
*s
);
865 void ff_msmpeg4_encode_init(MpegEncContext
*s
);
866 int ff_wmv2_decode_picture_header(MpegEncContext
* s
);
867 int ff_wmv2_decode_secondary_picture_header(MpegEncContext
* s
);
868 void ff_wmv2_add_mb(MpegEncContext
*s
, DCTELEM block
[6][64], uint8_t *dest_y
, uint8_t *dest_cb
, uint8_t *dest_cr
);
869 void ff_mspel_motion(MpegEncContext
*s
,
870 uint8_t *dest_y
, uint8_t *dest_cb
, uint8_t *dest_cr
,
871 uint8_t **ref_picture
, op_pixels_func (*pix_op
)[4],
872 int motion_x
, int motion_y
, int h
);
873 int ff_wmv2_encode_picture_header(MpegEncContext
* s
, int picture_number
);
874 void ff_wmv2_encode_mb(MpegEncContext
* s
,
875 DCTELEM block
[6][64],
876 int motion_x
, int motion_y
);
878 #endif /* AVCODEC_MPEGVIDEO_H */