FFmpeg
mpegvideo.h
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1 /*
2  * Generic DCT based hybrid video encoder
3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer
5  *
6  * This file is part of FFmpeg.
7  *
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.
12  *
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.
17  *
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
21  */
22 
23 /**
24  * @file
25  * mpegvideo header.
26  */
27 
28 #ifndef AVCODEC_MPEGVIDEO_H
29 #define AVCODEC_MPEGVIDEO_H
30 
31 #include "blockdsp.h"
32 #include "error_resilience.h"
33 #include "h264chroma.h"
34 #include "h263dsp.h"
35 #include "hpeldsp.h"
36 #include "idctdsp.h"
37 #include "mpegpicture.h"
38 #include "qpeldsp.h"
39 #include "videodsp.h"
40 
41 #define MAX_THREADS 32
42 
43 /**
44  * Scantable.
45  */
46 typedef struct ScanTable {
47  const uint8_t *scantable;
48  uint8_t permutated[64];
49  uint8_t raster_end[64];
50 } ScanTable;
51 
58 };
59 
60 /**
61  * MpegEncContext.
62  */
63 typedef struct MpegEncContext {
64  AVClass *class;
65 
67  int ac_pred;
68  int block_last_index[12]; ///< last non zero coefficient in block
69  int h263_aic; ///< Advanced INTRA Coding (AIC)
70 
71  /* scantables */
72  ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce the cache usage
73 
74  /* WARNING: changes above this line require updates to hardcoded
75  * offsets used in ASM. */
76 
80 
82  /* The following pointer is intended for codecs sharing code
83  * between decoder and encoder and in need of a common context to do so. */
84  void *private_ctx;
85  /* the following parameters must be initialized before encoding */
86  int width, height;///< picture size. must be a multiple of 16
87  enum OutputFormat out_format; ///< output format
88  int h263_pred; ///< use MPEG-4/H.263 ac/dc predictions
89 
90  enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
91  int encoding; ///< true if we are encoding (vs decoding)
92  int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
93  int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
94  /* the following fields are managed internally by the encoder */
95 
96  /* sequence parameters */
98  int mb_width, mb_height; ///< number of MBs horizontally & vertically
99  int mb_stride; ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
100  int b8_stride; ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
101  int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
102  int mb_num; ///< number of MBs of a picture
103  ptrdiff_t linesize; ///< line size, in bytes, may be different from width
104  ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
105  struct AVRefStructPool *picture_pool; ///< Pool for MPVPictures
106 
108 
109  int start_mb_y; ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
110  int end_mb_y; ///< end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
111  union {
115  };
116  int slice_context_count; ///< number of used thread_contexts
117 
118  /**
119  * copy of the previous picture structure.
120  * note, linesize & data, might not match the previous picture (for field pictures)
121  */
123 
124  /**
125  * copy of the next picture structure.
126  * note, linesize & data, might not match the next picture (for field pictures)
127  */
129 
130  /**
131  * copy of the current picture structure.
132  * note, linesize & data, might not match the current picture (for field pictures)
133  */
135 
136  int last_dc[3]; ///< last DC values for MPEG-1
137  int16_t *dc_val_base;
138  const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
139  const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
140  const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (H.263)
142  uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
143  int16_t (*ac_val_base)[16];
144  int16_t *dc_val; ///< used for H.263 AIC/MPEG-4 DC prediction and ER
145  int16_t (*ac_val)[16]; ///< used for H.263 AIC, MPEG-4 AC prediction
146  int mb_skipped; ///< MUST BE SET only during DECODING
147  uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
148  and used for B-frame encoding & decoding (contains skip table of next P-frame) */
149  uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
150  uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
151  uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
152 
154 
155  int qscale; ///< QP
156  int chroma_qscale; ///< chroma QP
157  int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
159 
167  int16_t (*p_field_mv_table_base)[2];
168  int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced P-frame encoding
169 
170  int mv_dir;
171 #define MV_DIR_FORWARD 1
172 #define MV_DIR_BACKWARD 2
173 #define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (MPEG-4)
174  int mv_type;
175 #define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
176 #define MV_TYPE_8X8 1 ///< 4 vectors (H.263, MPEG-4 4MV)
177 #define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
178 #define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
179 #define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
180  /**motion vectors for a macroblock
181  first coordinate : 0 = forward 1 = backward
182  second " : depend on type
183  third " : 0 = x, 1 = y
184  */
185  int mv[2][4][2];
186  int field_select[2][2];
187  int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
188  int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
189 
190  int no_rounding; /**< apply no rounding to motion compensation (MPEG-4, msmpeg4, ...)
191  for B-frames rounding mode is always 0 */
192 
193  /* macroblock layer */
194  int mb_x, mb_y;
195  int mb_intra;
196 
197  int block_index[6]; ///< index to current MB in block based arrays with edges
198  int block_wrap[6];
199  uint8_t *dest[3];
200 
201  int *mb_index2xy; ///< mb_index -> mb_x + mb_y*mb_stride
202 
203  /** matrix transmitted in the bitstream */
204  uint16_t intra_matrix[64];
205  uint16_t chroma_intra_matrix[64];
206  uint16_t inter_matrix[64];
207  uint16_t chroma_inter_matrix[64];
208 
209  /* error concealment / resync */
210  int resync_mb_x; ///< x position of last resync marker
211  int resync_mb_y; ///< y position of last resync marker
212 
213  /* H.263 specific */
214  int obmc; ///< overlapped block motion compensation
215 
216  /* H.263+ specific */
217  int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
218 
219  /* MPEG-4 specific */
222  int time_base; ///< time in seconds of last I,P,S Frame
223  int64_t time; ///< time of current frame
225  uint16_t pp_time; ///< time distance between the last 2 p,s,i frames
226  uint16_t pb_time; ///< time distance between the last b and p,s,i frame
227  uint16_t pp_field_time;
228  uint16_t pb_field_time; ///< like above, just for interlaced
229  int mcsel;
230  int quarter_sample; ///< 1->qpel, 0->half pel ME/MC
231  int low_delay; ///< no reordering needed / has no B-frames
232 
233  /* MSMPEG4 specific */
234  int first_slice_line; ///< used in MPEG-4 too to handle resync markers
235  enum {
242  MSMP4_VC1, ///< for VC1 (image), WMV3 (image) and MSS2.
243  } msmpeg4_version;
245  int mspel;
246 
247  /* MPEG-2-specific - I wished not to have to support this mess. */
249  int mpeg_f_code[2][2];
250 
251  // picture structure defines are loaded from mpegutils.h
253 
264 #define CHROMA_420 1
265 #define CHROMA_422 2
266 #define CHROMA_444 3
267  int chroma_x_shift;//depend on pix_format, that depend on chroma_format
269 
271  int full_pel[2];
273  int first_field; ///< is 1 for the first field of a field picture 0 otherwise
274 
275  void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)
276  int16_t *block/*align 16*/, int n, int qscale);
277  void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)
278  int16_t *block/*align 16*/, int n, int qscale);
279 
280  /* flag to indicate a reinitialization is required, e.g. after
281  * a frame size change */
283 
284  /// If set, ff_mpv_common_init() will allocate slice contexts of this size
285  unsigned slice_ctx_size;
286 
289 
291 
292 /**
293  * Set the given MpegEncContext to common defaults (same for encoding
294  * and decoding). The changed fields will not depend upon the prior
295  * state of the MpegEncContext.
296  */
298 
300 /**
301  * Initialize an MpegEncContext's thread contexts. Presumes that
302  * slice_context_count is already set and that all the fields
303  * that are freed/reset in free_duplicate_context() are NULL.
304  */
306 /**
307  * Initialize and allocates MpegEncContext fields dependent on the resolution.
308  */
310 /**
311  * Frees and resets MpegEncContext fields depending on the resolution
312  * as well as the slice thread contexts.
313  * Is used during resolution changes to avoid a full reinitialization of the
314  * codec.
315  */
317 
319 
321 
323 void ff_set_qscale(MpegEncContext * s, int qscale);
324 
326 void ff_init_scantable(const uint8_t *permutation, ScanTable *st,
327  const uint8_t *src_scantable);
329 
331  uint8_t *dest_y, uint8_t *dest_cb,
332  uint8_t *dest_cr, int dir,
333  uint8_t *const *ref_picture,
334  const op_pixels_func (*pix_op)[4],
335  const qpel_mc_func (*qpix_op)[16]);
336 
337 static inline void ff_update_block_index(MpegEncContext *s, int bits_per_raw_sample,
338  int lowres, int chroma_x_shift)
339 {
340  const int bytes_per_pixel = 1 + (bits_per_raw_sample > 8);
341  const int block_size = (8 * bytes_per_pixel) >> lowres;
342 
343  s->block_index[0]+=2;
344  s->block_index[1]+=2;
345  s->block_index[2]+=2;
346  s->block_index[3]+=2;
347  s->block_index[4]++;
348  s->block_index[5]++;
349  s->dest[0]+= 2*block_size;
350  s->dest[1] += (2 >> chroma_x_shift) * block_size;
351  s->dest[2] += (2 >> chroma_x_shift) * block_size;
352 }
353 
354 #endif /* AVCODEC_MPEGVIDEO_H */
MpegEncContext::h264chroma
H264ChromaContext h264chroma
Definition: mpegvideo.h:161
MpegEncContext::mb_skipped
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:146
MpegEncContext::progressive_sequence
int progressive_sequence
Definition: mpegvideo.h:248
MPVEncContext
Definition: mpegvideoenc.h:46
blockdsp.h
ff_mpv_motion
void ff_mpv_motion(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int dir, uint8_t *const *ref_picture, const op_pixels_func(*pix_op)[4], const qpel_mc_func(*qpix_op)[16])
Definition: mpegvideo_motion.c:821
MpegEncContext::inter_intra_pred
int inter_intra_pred
Definition: mpegvideo.h:244
MpegEncContext::top_field_first
int top_field_first
Definition: mpegvideo.h:256
MpegEncContext::pp_time
uint16_t pp_time
time distance between the last 2 p,s,i frames
Definition: mpegvideo.h:225
MpegEncContext::block_index
int block_index[6]
index to current MB in block based arrays with edges
Definition: mpegvideo.h:197
int64_t
long long int64_t
Definition: coverity.c:34
MpegEncContext::y_dc_scale
int y_dc_scale
Definition: mpegvideo.h:66
MpegEncContext::mb_num
int mb_num
number of MBs of a picture
Definition: mpegvideo.h:102
MpegEncContext::ac_val_base
int16_t(* ac_val_base)[16]
Definition: mpegvideo.h:143
MpegEncContext::workaround_bugs
int workaround_bugs
workaround bugs in encoders which cannot be detected automatically
Definition: mpegvideo.h:92
MpegEncContext::h263dsp
H263DSPContext h263dsp
Definition: mpegvideo.h:166
MpegEncContext::mb_width
int mb_width
Definition: mpegvideo.h:98
h263dsp.h
MpegEncContext::last_dc
int last_dc[3]
last DC values for MPEG-1
Definition: mpegvideo.h:136
MpegEncContext::chroma_qscale
int chroma_qscale
chroma QP
Definition: mpegvideo.h:156
MpegEncContext::repeat_first_field
int repeat_first_field
Definition: mpegvideo.h:261
ERContext
Definition: error_resilience.h:54
MpegEncContext::dest
uint8_t * dest[3]
Definition: mpegvideo.h:199
MpegEncContext::avctx
struct AVCodecContext * avctx
Definition: mpegvideo.h:81
MpegEncContext::last_non_b_time
int64_t last_non_b_time
Definition: mpegvideo.h:224
MpegEncContext::mcsel
int mcsel
Definition: mpegvideo.h:229
MpegEncContext::enc_contexts
struct MPVEncContext * enc_contexts[MAX_THREADS]
Definition: mpegvideo.h:114
FMT_H261
@ FMT_H261
Definition: mpegvideo.h:54
BlockDSPContext
Definition: blockdsp.h:32
MpegEncContext::height
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:86
MpegEncContext::msmpeg4_version
enum MpegEncContext::@210 msmpeg4_version
MpegEncContext::mv
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:185
ScratchpadContext
Definition: mpegpicture.h:34
MpegEncContext::out_format
enum OutputFormat out_format
output format
Definition: mpegvideo.h:87
MpegEncContext::time_base
int time_base
time in seconds of last I,P,S Frame
Definition: mpegvideo.h:222
MpegEncContext::mpeg_f_code
int mpeg_f_code[2][2]
Definition: mpegvideo.h:249
MpegEncContext::intra_scantable
ScanTable intra_scantable
Definition: mpegvideo.h:77
FMT_MJPEG
@ FMT_MJPEG
Definition: mpegvideo.h:56
MpegEncContext::mb_height
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:98
MpegEncContext::permutated_intra_v_scantable
uint8_t permutated_intra_v_scantable[64]
Definition: mpegvideo.h:79
MpegEncContext::pict_type
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:157
MpegEncContext::h263_pred
int h263_pred
use MPEG-4/H.263 ac/dc predictions
Definition: mpegvideo.h:88
MpegEncContext::mbintra_table
uint8_t * mbintra_table
used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
Definition: mpegvideo.h:149
FMT_MPEG1
@ FMT_MPEG1
Definition: mpegvideo.h:53
MpegEncContext::chroma_y_shift
int chroma_y_shift
Definition: mpegvideo.h:268
MpegEncContext::picture_structure
int picture_structure
Definition: mpegvideo.h:252
FMT_SPEEDHQ
@ FMT_SPEEDHQ
Definition: mpegvideo.h:57
MpegEncContext::vdsp
VideoDSPContext vdsp
Definition: mpegvideo.h:165
MpegEncContext::MSMP4_WMV1
@ MSMP4_WMV1
Definition: mpegvideo.h:240
ff_init_scantable
void ff_init_scantable(const uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: mpegvideo.c:82
MpegEncContext::linesize
ptrdiff_t linesize
line size, in bytes, may be different from width
Definition: mpegvideo.h:103
MpegEncContext::bdsp
BlockDSPContext bdsp
Definition: mpegvideo.h:160
MpegEncContext::width
int width
Definition: mpegvideo.h:86
ff_mpv_idct_init
void ff_mpv_idct_init(MpegEncContext *s)
Definition: mpegvideo.c:96
MpegEncContext::frame_pred_frame_dct
int frame_pred_frame_dct
Definition: mpegvideo.h:255
MpegEncContext::slice_ctx_size
unsigned slice_ctx_size
If set, ff_mpv_common_init() will allocate slice contexts of this size.
Definition: mpegvideo.h:285
H263DSPContext
Definition: h263dsp.h:26
MpegEncContext::ac_val
int16_t(* ac_val)[16]
used for H.263 AIC, MPEG-4 AC prediction
Definition: mpegvideo.h:145
ff_set_qscale
void ff_set_qscale(MpegEncContext *s, int qscale)
set qscale and update qscale dependent variables.
Definition: mpegvideo.c:524
MpegEncContext::coded_block
uint8_t * coded_block
used for coded block pattern prediction (msmpeg4v3, wmv1)
Definition: mpegvideo.h:142
MpegEncContext::pp_field_time
uint16_t pp_field_time
Definition: mpegvideo.h:227
s
#define s(width, name)
Definition: cbs_vp9.c:198
MpegEncContext::last_time_base
int last_time_base
Definition: mpegvideo.h:221
MpegEncContext::mv_dir
int mv_dir
Definition: mpegvideo.h:170
MpegEncContext::h_edge_pos
int h_edge_pos
Definition: mpegvideo.h:101
ff_mpv_common_defaults
void ff_mpv_common_defaults(MpegEncContext *s)
Set the given MpegEncContext to common defaults (same for encoding and decoding).
Definition: mpegvideo.c:190
MpegEncContext::p_field_mv_table_base
int16_t(* p_field_mv_table_base)[2]
Definition: mpegvideo.h:167
AVRefStructPool
AVRefStructPool is an API for a thread-safe pool of objects managed via the RefStruct API.
Definition: refstruct.c:183
ScanTable::scantable
const uint8_t * scantable
Definition: mpegvideo.h:47
MpegEncContext::cur_pic
MPVWorkPicture cur_pic
copy of the current picture structure.
Definition: mpegvideo.h:134
FMT_H263
@ FMT_H263
Definition: mpegvideo.h:55
MpegEncContext::mb_stride
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
Definition: mpegvideo.h:99
Mpeg12SliceContext
Definition: mpeg12dec.c:73
MpegEncContext::low_delay
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:231
MpegEncContext::picture_pool
struct AVRefStructPool * picture_pool
Pool for MPVPictures.
Definition: mpegvideo.h:105
MpegEncContext::field_select
int field_select[2][2]
Definition: mpegvideo.h:186
MpegEncContext::mpeg12_contexts
struct Mpeg12SliceContext * mpeg12_contexts[MAX_THREADS]
Definition: mpegvideo.h:113
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:76
MpegEncContext::chroma_420_type
int chroma_420_type
Definition: mpegvideo.h:262
ff_mpv_common_end
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:447
MpegEncContext::mb_y
int mb_y
Definition: mpegvideo.h:194
MpegEncContext::next_pic
MPVWorkPicture next_pic
copy of the next picture structure.
Definition: mpegvideo.h:128
MpegEncContext::h263_aic
int h263_aic
Advanced INTRA Coding (AIC)
Definition: mpegvideo.h:69
OutputFormat
OutputFormat
Definition: mpegvideo.h:52
MpegEncContext::y_dc_scale_table
const uint8_t * y_dc_scale_table
qscale -> y_dc_scale table
Definition: mpegvideo.h:138
MpegEncContext::inter_matrix
uint16_t inter_matrix[64]
Definition: mpegvideo.h:206
MpegEncContext::hdsp
HpelDSPContext hdsp
Definition: mpegvideo.h:162
MpegEncContext::concealment_motion_vectors
int concealment_motion_vectors
Definition: mpegvideo.h:257
MpegEncContext::b8_stride
int b8_stride
2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
Definition: mpegvideo.h:100
lowres
static int lowres
Definition: ffplay.c:330
qpeldsp.h
MpegEncContext::slice_context_count
int slice_context_count
number of used thread_contexts
Definition: mpegvideo.h:116
op_pixels_func
void(* op_pixels_func)(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
Definition: hpeldsp.h:38
MpegEncContext::pb_time
uint16_t pb_time
time distance between the last b and p,s,i frame
Definition: mpegvideo.h:226
qpel_mc_func
void(* qpel_mc_func)(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)
Definition: qpeldsp.h:65
MpegEncContext::private_ctx
void * private_ctx
Definition: mpegvideo.h:84
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:49
MpegEncContext::idsp
IDCTDSPContext idsp
Definition: mpegvideo.h:163
MpegEncContext::c_dc_scale
int c_dc_scale
Definition: mpegvideo.h:66
HpelDSPContext
Half-pel DSP context.
Definition: hpeldsp.h:45
MpegEncContext::pb_field_time
uint16_t pb_field_time
like above, just for interlaced
Definition: mpegvideo.h:228
MpegEncContext::coded_block_base
uint8_t * coded_block_base
Definition: mpegvideo.h:141
ff_mpv_init_duplicate_contexts
int ff_mpv_init_duplicate_contexts(MpegEncContext *s)
Initialize an MpegEncContext's thread contexts.
Definition: mpegvideo.c:118
MpegEncContext::mb_intra
int mb_intra
Definition: mpegvideo.h:195
MpegEncContext::chroma_qscale_table
const uint8_t * chroma_qscale_table
qscale -> chroma_qscale (H.263)
Definition: mpegvideo.h:140
MpegEncContext::qscale
int qscale
QP.
Definition: mpegvideo.h:155
MpegEncContext::first_slice_line
int first_slice_line
used in MPEG-4 too to handle resync markers
Definition: mpegvideo.h:234
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:87
MpegEncContext::intra_matrix
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
Definition: mpegvideo.h:204
ff_update_block_index
static void ff_update_block_index(MpegEncContext *s, int bits_per_raw_sample, int lowres, int chroma_x_shift)
Definition: mpegvideo.h:337
MpegEncContext::v_edge_pos
int v_edge_pos
horizontal / vertical position of the right/bottom edge (pixel replication)
Definition: mpegvideo.h:101
MpegEncContext::qdsp
QpelDSPContext qdsp
Definition: mpegvideo.h:164
h264chroma.h
MpegEncContext::interlaced_dct
int interlaced_dct
Definition: mpegvideo.h:272
MpegEncContext::encoding
int encoding
true if we are encoding (vs decoding)
Definition: mpegvideo.h:91
MpegEncContext::mbskip_table
uint8_t * mbskip_table
used to avoid copy if macroblock skipped (for black regions for example) and used for B-frame encodin...
Definition: mpegvideo.h:147
MAX_THREADS
#define MAX_THREADS
Definition: mpegvideo.h:41
MpegEncContext::quarter_sample
int quarter_sample
1->qpel, 0->half pel ME/MC
Definition: mpegvideo.h:230
MpegEncContext::context_initialized
int context_initialized
Definition: mpegvideo.h:97
mpegpicture.h
ff_mpv_init_context_frame
int ff_mpv_init_context_frame(MpegEncContext *s)
Initialize and allocates MpegEncContext fields dependent on the resolution.
Definition: mpegvideo.c:210
MpegEncContext::context_reinit
int context_reinit
Definition: mpegvideo.h:282
MpegEncContext::buffer_pools
BufferPoolContext buffer_pools
Definition: mpegvideo.h:107
MpegEncContext::MSMP4_VC1
@ MSMP4_VC1
for VC1 (image), WMV3 (image) and MSS2.
Definition: mpegvideo.h:242
ff_mpv_common_init
int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:378
ff_init_block_index
void ff_init_block_index(MpegEncContext *s)
Definition: mpegvideo.c:491
MpegEncContext::full_pel
int full_pel[2]
Definition: mpegvideo.h:271
MpegEncContext::block_last_index
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:68
MpegEncContext::dc_val_base
int16_t * dc_val_base
Definition: mpegvideo.h:137
MpegEncContext::last_mv
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
Definition: mpegvideo.h:187
MpegEncContext::uvlinesize
ptrdiff_t uvlinesize
line size, for chroma in bytes, may be different from width
Definition: mpegvideo.h:104
MpegEncContext::progressive_frame
int progressive_frame
Definition: mpegvideo.h:270
MpegEncContext::chroma_inter_matrix
uint16_t chroma_inter_matrix[64]
Definition: mpegvideo.h:207
ff_update_duplicate_context
int ff_update_duplicate_context(MpegEncContext *dst, const MpegEncContext *src)
Definition: mpegvideo.c:158
MPVContext
MpegEncContext MPVContext
Definition: mpegvideo.h:290
MpegEncContext::obmc
int obmc
overlapped block motion compensation
Definition: mpegvideo.h:214
MpegEncContext::mb_x
int mb_x
Definition: mpegvideo.h:194
MpegEncContext::thread_context
struct MpegEncContext * thread_context[MAX_THREADS]
Definition: mpegvideo.h:112
MpegEncContext::sc
ScratchpadContext sc
Definition: mpegvideo.h:153
MpegEncContext::MSMP4_V3
@ MSMP4_V3
Definition: mpegvideo.h:239
MpegEncContext::last_pic
MPVWorkPicture last_pic
copy of the previous picture structure.
Definition: mpegvideo.h:122
MpegEncContext::intra_vlc_format
int intra_vlc_format
Definition: mpegvideo.h:259
MpegEncContext::permutated_intra_h_scantable
uint8_t permutated_intra_h_scantable[64]
Definition: mpegvideo.h:78
MpegEncContext::er
ERContext er
Definition: mpegvideo.h:287
MpegEncContext::MSMP4_V1
@ MSMP4_V1
Definition: mpegvideo.h:237
MpegEncContext::dct_unquantize_inter
void(* dct_unquantize_inter)(struct MpegEncContext *s, int16_t *block, int n, int qscale)
Definition: mpegvideo.h:277
idctdsp.h
ff_clean_intra_table_entries
void ff_clean_intra_table_entries(MpegEncContext *s)
Clean dc, ac for the current non-intra MB.
Definition: mpegvideo.c:466
MpegEncContext::mspel
int mspel
Definition: mpegvideo.h:245
MpegEncContext::MSMP4_WMV2
@ MSMP4_WMV2
Definition: mpegvideo.h:241
IDCTDSPContext
Definition: idctdsp.h:43
MpegEncContext::p_field_mv_table
int16_t(*[2][2] p_field_mv_table)[2]
MV table (2MV per MB) interlaced P-frame encoding.
Definition: mpegvideo.h:168
MpegEncContext::chroma_x_shift
int chroma_x_shift
Definition: mpegvideo.h:267
QpelDSPContext
quarterpel DSP context
Definition: qpeldsp.h:72
AVCodecContext
main external API structure.
Definition: avcodec.h:431
MpegEncContext::intra_dc_precision
int intra_dc_precision
Definition: mpegvideo.h:254
error_resilience.h
MpegEncContext::time
int64_t time
time of current frame
Definition: mpegvideo.h:223
MpegEncContext::pred_dir_table
uint8_t * pred_dir_table
used to store pred_dir for partitioned decoding
Definition: mpegvideo.h:151
MpegEncContext::dct_unquantize_intra
void(* dct_unquantize_intra)(struct MpegEncContext *s, int16_t *block, int n, int qscale)
Definition: mpegvideo.h:275
MpegEncContext::resync_mb_x
int resync_mb_x
x position of last resync marker
Definition: mpegvideo.h:210
VideoDSPContext
Definition: videodsp.h:40
MpegEncContext::no_rounding
int no_rounding
apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always ...
Definition: mpegvideo.h:190
MpegEncContext::h263_aic_dir
int h263_aic_dir
AIC direction: 0 = left, 1 = top.
Definition: mpegvideo.h:217
MpegEncContext::inter_scantable
ScanTable inter_scantable
if inter == intra then intra should be used to reduce the cache usage
Definition: mpegvideo.h:72
MpegEncContext::droppable
int droppable
Definition: mpegvideo.h:158
MPVWorkPicture
Definition: mpegpicture.h:95
MpegEncContext::MSMP4_UNUSED
@ MSMP4_UNUSED
Definition: mpegvideo.h:236
ScanTable
Scantable.
Definition: mpegvideo.h:46
MpegEncContext::cbp_table
uint8_t * cbp_table
used to store cbp, ac_pred for partitioned decoding
Definition: mpegvideo.h:150
MpegEncContext::first_field
int first_field
is 1 for the first field of a field picture 0 otherwise
Definition: mpegvideo.h:273
MpegEncContext::q_scale_type
int q_scale_type
Definition: mpegvideo.h:258
H264ChromaContext
Definition: h264chroma.h:27
ScanTable::permutated
uint8_t permutated[64]
Definition: mpegvideo.h:48
MpegEncContext::MSMP4_V2
@ MSMP4_V2
Definition: mpegvideo.h:238
videodsp.h
hpeldsp.h
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
ff_mpv_free_context_frame
void ff_mpv_free_context_frame(MpegEncContext *s)
Frees and resets MpegEncContext fields depending on the resolution as well as the slice thread contex...
Definition: mpegvideo.c:421
BufferPoolContext
Definition: mpegpicture.h:44
MpegEncContext::resync_mb_y
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:211
MpegEncContext::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)
Definition: mpegvideo.h:110
MpegEncContext::mb_index2xy
int * mb_index2xy
mb_index -> mb_x + mb_y*mb_stride
Definition: mpegvideo.h:201
MpegEncContext::start_mb_y
int start_mb_y
start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
Definition: mpegvideo.h:109
MpegEncContext::block_wrap
int block_wrap[6]
Definition: mpegvideo.h:198
MpegEncContext::alternate_scan
int alternate_scan
Definition: mpegvideo.h:260
MpegEncContext::direct_scale_mv
int16_t direct_scale_mv[2][64]
precomputed to avoid divisions in ff_mpeg4_set_direct_mv
Definition: mpegvideo.h:188
MpegEncContext::c_dc_scale_table
const uint8_t * c_dc_scale_table
qscale -> c_dc_scale table
Definition: mpegvideo.h:139
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:63
MpegEncContext::codec_id
enum AVCodecID codec_id
Definition: mpegvideo.h:90
MpegEncContext::dc_val
int16_t * dc_val
used for H.263 AIC/MPEG-4 DC prediction and ER
Definition: mpegvideo.h:144
src
#define src
Definition: vp8dsp.c:248
MpegEncContext::chroma_intra_matrix
uint16_t chroma_intra_matrix[64]
Definition: mpegvideo.h:205
ScanTable::raster_end
uint8_t raster_end[64]
Definition: mpegvideo.h:49
MpegEncContext::chroma_format
int chroma_format
Definition: mpegvideo.h:263
MpegEncContext::studio_profile
int studio_profile
Definition: mpegvideo.h:220
MpegEncContext::ac_pred
int ac_pred
Definition: mpegvideo.h:67
MpegEncContext::codec_tag
int codec_tag
internal codec_tag upper case converted from avctx codec_tag
Definition: mpegvideo.h:93