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mpegpicture.c
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1 /*
2  * Mpeg video formats-related picture management functions
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <stdint.h>
22 
23 #include "libavutil/avassert.h"
24 #include "libavutil/common.h"
25 
26 #include "avcodec.h"
27 #include "motion_est.h"
28 #include "mpegpicture.h"
29 #include "mpegutils.h"
30 
31 static int make_tables_writable(Picture *pic)
32 {
33  int ret, i;
34 #define MAKE_WRITABLE(table) \
35 do {\
36  if (pic->table &&\
37  (ret = av_buffer_make_writable(&pic->table)) < 0)\
38  return ret;\
39 } while (0)
40 
41  MAKE_WRITABLE(mb_var_buf);
42  MAKE_WRITABLE(mc_mb_var_buf);
43  MAKE_WRITABLE(mb_mean_buf);
44  MAKE_WRITABLE(mbskip_table_buf);
45  MAKE_WRITABLE(qscale_table_buf);
46  MAKE_WRITABLE(mb_type_buf);
47 
48  for (i = 0; i < 2; i++) {
49  MAKE_WRITABLE(motion_val_buf[i]);
50  MAKE_WRITABLE(ref_index_buf[i]);
51  }
52 
53  return 0;
54 }
55 
57  ScratchpadContext *sc, int linesize)
58 {
59  int alloc_size = FFALIGN(FFABS(linesize) + 64, 32);
60 
61  if (avctx->hwaccel
64 #endif
65  )
66  return 0;
67 
68  if (linesize < 24) {
69  av_log(avctx, AV_LOG_ERROR, "Image too small, temporary buffers cannot function\n");
70  return AVERROR_PATCHWELCOME;
71  }
72 
73  // edge emu needs blocksize + filter length - 1
74  // (= 17x17 for halfpel / 21x21 for H.264)
75  // VC-1 computes luma and chroma simultaneously and needs 19X19 + 9x9
76  // at uvlinesize. It supports only YUV420 so 24x24 is enough
77  // linesize * interlaced * MBsize
78  // we also use this buffer for encoding in encode_mb_internal() needig an additional 32 lines
79  FF_ALLOCZ_ARRAY_OR_GOTO(avctx, sc->edge_emu_buffer, alloc_size, 4 * 68,
80  fail);
81 
82  FF_ALLOCZ_ARRAY_OR_GOTO(avctx, me->scratchpad, alloc_size, 4 * 16 * 2,
83  fail)
84  me->temp = me->scratchpad;
85  sc->rd_scratchpad = me->scratchpad;
86  sc->b_scratchpad = me->scratchpad;
87  sc->obmc_scratchpad = me->scratchpad + 16;
88 
89  return 0;
90 fail:
92  return AVERROR(ENOMEM);
93 }
94 
95 /**
96  * Allocate a frame buffer
97  */
98 static int alloc_frame_buffer(AVCodecContext *avctx, Picture *pic,
100  int chroma_x_shift, int chroma_y_shift,
101  int linesize, int uvlinesize)
102 {
103  int edges_needed = av_codec_is_encoder(avctx->codec);
104  int r, ret;
105 
106  pic->tf.f = pic->f;
107  if (avctx->codec_id != AV_CODEC_ID_WMV3IMAGE &&
108  avctx->codec_id != AV_CODEC_ID_VC1IMAGE &&
109  avctx->codec_id != AV_CODEC_ID_MSS2) {
110  if (edges_needed) {
111  pic->f->width = avctx->width + 2 * EDGE_WIDTH;
112  pic->f->height = avctx->height + 2 * EDGE_WIDTH;
113  }
114 
115  r = ff_thread_get_buffer(avctx, &pic->tf,
116  pic->reference ? AV_GET_BUFFER_FLAG_REF : 0);
117  } else {
118  pic->f->width = avctx->width;
119  pic->f->height = avctx->height;
120  pic->f->format = avctx->pix_fmt;
121  r = avcodec_default_get_buffer2(avctx, pic->f, 0);
122  }
123 
124  if (r < 0 || !pic->f->buf[0]) {
125  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed (%d %p)\n",
126  r, pic->f->data[0]);
127  return -1;
128  }
129 
130  if (edges_needed) {
131  int i;
132  for (i = 0; pic->f->data[i]; i++) {
133  int offset = (EDGE_WIDTH >> (i ? chroma_y_shift : 0)) *
134  pic->f->linesize[i] +
135  (EDGE_WIDTH >> (i ? chroma_x_shift : 0));
136  pic->f->data[i] += offset;
137  }
138  pic->f->width = avctx->width;
139  pic->f->height = avctx->height;
140  }
141 
142  if (avctx->hwaccel) {
143  assert(!pic->hwaccel_picture_private);
144  if (avctx->hwaccel->frame_priv_data_size) {
146  if (!pic->hwaccel_priv_buf) {
147  av_log(avctx, AV_LOG_ERROR, "alloc_frame_buffer() failed (hwaccel private data allocation)\n");
148  return -1;
149  }
151  }
152  }
153 
154  if (linesize && (linesize != pic->f->linesize[0] ||
155  uvlinesize != pic->f->linesize[1])) {
156  av_log(avctx, AV_LOG_ERROR,
157  "get_buffer() failed (stride changed)\n");
158  ff_mpeg_unref_picture(avctx, pic);
159  return -1;
160  }
161 
162  if (pic->f->linesize[1] != pic->f->linesize[2]) {
163  av_log(avctx, AV_LOG_ERROR,
164  "get_buffer() failed (uv stride mismatch)\n");
165  ff_mpeg_unref_picture(avctx, pic);
166  return -1;
167  }
168 
169  if (!sc->edge_emu_buffer &&
170  (ret = ff_mpeg_framesize_alloc(avctx, me, sc,
171  pic->f->linesize[0])) < 0) {
172  av_log(avctx, AV_LOG_ERROR,
173  "get_buffer() failed to allocate context scratch buffers.\n");
174  ff_mpeg_unref_picture(avctx, pic);
175  return ret;
176  }
177 
178  return 0;
179 }
180 
181 static int alloc_picture_tables(AVCodecContext *avctx, Picture *pic, int encoding, int out_format,
182  int mb_stride, int mb_width, int mb_height, int b8_stride)
183 {
184  const int big_mb_num = mb_stride * (mb_height + 1) + 1;
185  const int mb_array_size = mb_stride * mb_height;
186  const int b8_array_size = b8_stride * mb_height * 2;
187  int i;
188 
189 
190  pic->mbskip_table_buf = av_buffer_allocz(mb_array_size + 2);
191  pic->qscale_table_buf = av_buffer_allocz(big_mb_num + mb_stride);
192  pic->mb_type_buf = av_buffer_allocz((big_mb_num + mb_stride) *
193  sizeof(uint32_t));
194  if (!pic->mbskip_table_buf || !pic->qscale_table_buf || !pic->mb_type_buf)
195  return AVERROR(ENOMEM);
196 
197  if (encoding) {
198  pic->mb_var_buf = av_buffer_allocz(mb_array_size * sizeof(int16_t));
199  pic->mc_mb_var_buf = av_buffer_allocz(mb_array_size * sizeof(int16_t));
200  pic->mb_mean_buf = av_buffer_allocz(mb_array_size);
201  if (!pic->mb_var_buf || !pic->mc_mb_var_buf || !pic->mb_mean_buf)
202  return AVERROR(ENOMEM);
203  }
204 
205  if (out_format == FMT_H263 || encoding || avctx->debug_mv ||
206  (avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS)) {
207  int mv_size = 2 * (b8_array_size + 4) * sizeof(int16_t);
208  int ref_index_size = 4 * mb_array_size;
209 
210  for (i = 0; mv_size && i < 2; i++) {
211  pic->motion_val_buf[i] = av_buffer_allocz(mv_size);
212  pic->ref_index_buf[i] = av_buffer_allocz(ref_index_size);
213  if (!pic->motion_val_buf[i] || !pic->ref_index_buf[i])
214  return AVERROR(ENOMEM);
215  }
216  }
217 
218  pic->alloc_mb_width = mb_width;
219  pic->alloc_mb_height = mb_height;
220 
221  return 0;
222 }
223 
224 /**
225  * Allocate a Picture.
226  * The pixels are allocated/set by calling get_buffer() if shared = 0
227  */
229  ScratchpadContext *sc, int shared, int encoding,
230  int chroma_x_shift, int chroma_y_shift, int out_format,
231  int mb_stride, int mb_width, int mb_height, int b8_stride,
232  ptrdiff_t *linesize, ptrdiff_t *uvlinesize)
233 {
234  int i, ret;
235 
236  if (pic->qscale_table_buf)
237  if ( pic->alloc_mb_width != mb_width
238  || pic->alloc_mb_height != mb_height)
240 
241  if (shared) {
242  av_assert0(pic->f->data[0]);
243  pic->shared = 1;
244  } else {
245  av_assert0(!pic->f->buf[0]);
246  if (alloc_frame_buffer(avctx, pic, me, sc,
247  chroma_x_shift, chroma_y_shift,
248  *linesize, *uvlinesize) < 0)
249  return -1;
250 
251  *linesize = pic->f->linesize[0];
252  *uvlinesize = pic->f->linesize[1];
253  }
254 
255  if (!pic->qscale_table_buf)
256  ret = alloc_picture_tables(avctx, pic, encoding, out_format,
257  mb_stride, mb_width, mb_height, b8_stride);
258  else
259  ret = make_tables_writable(pic);
260  if (ret < 0)
261  goto fail;
262 
263  if (encoding) {
264  pic->mb_var = (uint16_t*)pic->mb_var_buf->data;
265  pic->mc_mb_var = (uint16_t*)pic->mc_mb_var_buf->data;
266  pic->mb_mean = pic->mb_mean_buf->data;
267  }
268 
269  pic->mbskip_table = pic->mbskip_table_buf->data;
270  pic->qscale_table = pic->qscale_table_buf->data + 2 * mb_stride + 1;
271  pic->mb_type = (uint32_t*)pic->mb_type_buf->data + 2 * mb_stride + 1;
272 
273  if (pic->motion_val_buf[0]) {
274  for (i = 0; i < 2; i++) {
275  pic->motion_val[i] = (int16_t (*)[2])pic->motion_val_buf[i]->data + 4;
276  pic->ref_index[i] = pic->ref_index_buf[i]->data;
277  }
278  }
279 
280  return 0;
281 fail:
282  av_log(avctx, AV_LOG_ERROR, "Error allocating a picture.\n");
283  ff_mpeg_unref_picture(avctx, pic);
285  return AVERROR(ENOMEM);
286 }
287 
288 /**
289  * Deallocate a picture.
290  */
292 {
293  int off = offsetof(Picture, mb_mean) + sizeof(pic->mb_mean);
294 
295  pic->tf.f = pic->f;
296  /* WM Image / Screen codecs allocate internal buffers with different
297  * dimensions / colorspaces; ignore user-defined callbacks for these. */
298  if (avctx->codec_id != AV_CODEC_ID_WMV3IMAGE &&
299  avctx->codec_id != AV_CODEC_ID_VC1IMAGE &&
300  avctx->codec_id != AV_CODEC_ID_MSS2)
301  ff_thread_release_buffer(avctx, &pic->tf);
302  else if (pic->f)
303  av_frame_unref(pic->f);
304 
306 
307  if (pic->needs_realloc)
309 
310  memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
311 }
312 
314 {
315  int i;
316 
317 #define UPDATE_TABLE(table) \
318 do { \
319  if (src->table && \
320  (!dst->table || dst->table->buffer != src->table->buffer)) { \
321  av_buffer_unref(&dst->table); \
322  dst->table = av_buffer_ref(src->table); \
323  if (!dst->table) { \
324  ff_free_picture_tables(dst); \
325  return AVERROR(ENOMEM); \
326  } \
327  } \
328 } while (0)
329 
330  UPDATE_TABLE(mb_var_buf);
331  UPDATE_TABLE(mc_mb_var_buf);
332  UPDATE_TABLE(mb_mean_buf);
333  UPDATE_TABLE(mbskip_table_buf);
334  UPDATE_TABLE(qscale_table_buf);
335  UPDATE_TABLE(mb_type_buf);
336  for (i = 0; i < 2; i++) {
337  UPDATE_TABLE(motion_val_buf[i]);
338  UPDATE_TABLE(ref_index_buf[i]);
339  }
340 
341  dst->mb_var = src->mb_var;
342  dst->mc_mb_var = src->mc_mb_var;
343  dst->mb_mean = src->mb_mean;
344  dst->mbskip_table = src->mbskip_table;
345  dst->qscale_table = src->qscale_table;
346  dst->mb_type = src->mb_type;
347  for (i = 0; i < 2; i++) {
348  dst->motion_val[i] = src->motion_val[i];
349  dst->ref_index[i] = src->ref_index[i];
350  }
351 
352  dst->alloc_mb_width = src->alloc_mb_width;
353  dst->alloc_mb_height = src->alloc_mb_height;
354 
355  return 0;
356 }
357 
359 {
360  int ret;
361 
362  av_assert0(!dst->f->buf[0]);
363  av_assert0(src->f->buf[0]);
364 
365  src->tf.f = src->f;
366  dst->tf.f = dst->f;
367  ret = ff_thread_ref_frame(&dst->tf, &src->tf);
368  if (ret < 0)
369  goto fail;
370 
371  ret = ff_update_picture_tables(dst, src);
372  if (ret < 0)
373  goto fail;
374 
375  if (src->hwaccel_picture_private) {
377  if (!dst->hwaccel_priv_buf)
378  goto fail;
380  }
381 
382  dst->field_picture = src->field_picture;
383  dst->mb_var_sum = src->mb_var_sum;
384  dst->mc_mb_var_sum = src->mc_mb_var_sum;
385  dst->b_frame_score = src->b_frame_score;
386  dst->needs_realloc = src->needs_realloc;
387  dst->reference = src->reference;
388  dst->shared = src->shared;
389 
390  memcpy(dst->encoding_error, src->encoding_error,
391  sizeof(dst->encoding_error));
392 
393  return 0;
394 fail:
395  ff_mpeg_unref_picture(avctx, dst);
396  return ret;
397 }
398 
399 static inline int pic_is_unused(Picture *pic)
400 {
401  if (!pic->f->buf[0])
402  return 1;
403  if (pic->needs_realloc && !(pic->reference & DELAYED_PIC_REF))
404  return 1;
405  return 0;
406 }
407 
408 static int find_unused_picture(AVCodecContext *avctx, Picture *picture, int shared)
409 {
410  int i;
411 
412  if (shared) {
413  for (i = 0; i < MAX_PICTURE_COUNT; i++) {
414  if (!picture[i].f->buf[0])
415  return i;
416  }
417  } else {
418  for (i = 0; i < MAX_PICTURE_COUNT; i++) {
419  if (pic_is_unused(&picture[i]))
420  return i;
421  }
422  }
423 
424  av_log(avctx, AV_LOG_FATAL,
425  "Internal error, picture buffer overflow\n");
426  /* We could return -1, but the codec would crash trying to draw into a
427  * non-existing frame anyway. This is safer than waiting for a random crash.
428  * Also the return of this is never useful, an encoder must only allocate
429  * as much as allowed in the specification. This has no relationship to how
430  * much libavcodec could allocate (and MAX_PICTURE_COUNT is always large
431  * enough for such valid streams).
432  * Plus, a decoder has to check stream validity and remove frames if too
433  * many reference frames are around. Waiting for "OOM" is not correct at
434  * all. Similarly, missing reference frames have to be replaced by
435  * interpolated/MC frames, anything else is a bug in the codec ...
436  */
437  abort();
438  return -1;
439 }
440 
441 int ff_find_unused_picture(AVCodecContext *avctx, Picture *picture, int shared)
442 {
443  int ret = find_unused_picture(avctx, picture, shared);
444 
445  if (ret >= 0 && ret < MAX_PICTURE_COUNT) {
446  if (picture[ret].needs_realloc) {
447  picture[ret].needs_realloc = 0;
448  ff_free_picture_tables(&picture[ret]);
449  ff_mpeg_unref_picture(avctx, &picture[ret]);
450  }
451  }
452  return ret;
453 }
454 
456 {
457  int i;
458 
459  pic->alloc_mb_width =
460  pic->alloc_mb_height = 0;
461 
468 
469  for (i = 0; i < 2; i++) {
471  av_buffer_unref(&pic->ref_index_buf[i]);
472  }
473 }
uint8_t * scratchpad
data area for the ME algo, so that the ME does not need to malloc/free.
Definition: motion_est.h:52
const struct AVCodec * codec
Definition: avcodec.h:1658
int8_t * ref_index[2]
Definition: mpegpicture.h:62
AVBufferRef * mb_var_buf
Definition: mpegpicture.h:64
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:124
#define FF_ALLOCZ_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)
Definition: internal.h:157
uint8_t * mb_mean
Table for MB luminance.
Definition: mpegpicture.h:74
uint8_t * edge_emu_buffer
temporary buffer for if MVs point to out-of-frame data
Definition: mpegpicture.h:36
AVFrame * f
Definition: thread.h:36
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:363
uint16_t * mb_var
Table for MB variances.
Definition: mpegpicture.h:65
static int pic_is_unused(Picture *pic)
Definition: mpegpicture.c:399
#define me
int needs_realloc
Picture needs to be reallocated (eg due to a frame size change)
Definition: mpegpicture.h:85
#define DELAYED_PIC_REF
Value of Picture.reference when Picture is not a reference picture, but is held for delayed output...
Definition: diracdec.c:64
int field_picture
whether or not the picture was encoded in separate fields
Definition: mpegpicture.h:79
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1877
static int alloc_frame_buffer(AVCodecContext *avctx, Picture *pic, MotionEstContext *me, ScratchpadContext *sc, int chroma_x_shift, int chroma_y_shift, int linesize, int uvlinesize)
Allocate a frame buffer.
Definition: mpegpicture.c:98
int ff_mpeg_ref_picture(AVCodecContext *avctx, Picture *dst, Picture *src)
Definition: mpegpicture.c:358
int b_frame_score
Definition: mpegpicture.h:84
int av_codec_is_encoder(const AVCodec *codec)
Definition: utils.c:168
int alloc_mb_width
mb_width used to allocate tables
Definition: mpegpicture.h:70
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2968
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t
static int make_tables_writable(Picture *pic)
Definition: mpegpicture.c:31
Motion estimation context.
Definition: motion_est.h:47
void ff_free_picture_tables(Picture *pic)
Definition: mpegpicture.c:455
int ff_find_unused_picture(AVCodecContext *avctx, Picture *picture, int shared)
Definition: mpegpicture.c:441
#define FF_API_CAP_VDPAU
Definition: version.h:73
int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
Definition: utils.c:3841
#define AV_CODEC_CAP_HWACCEL_VDPAU
Codec can export data for HW decoding (VDPAU).
Definition: avcodec.h:992
AVBufferRef * mb_type_buf
Definition: mpegpicture.h:55
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
#define UPDATE_TABLE(table)
AVBufferRef * mb_mean_buf
Definition: mpegpicture.h:73
#define EDGE_WIDTH
Definition: mpegpicture.h:33
ThreadFrame tf
Definition: mpegpicture.h:47
int width
width and height of the video frame
Definition: frame.h:236
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
uint8_t * mbskip_table
Definition: mpegpicture.h:59
static int alloc_picture_tables(AVCodecContext *avctx, Picture *pic, int encoding, int out_format, int mb_stride, int mb_width, int mb_height, int b8_stride)
Definition: mpegpicture.c:181
void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
Wrapper around release_buffer() frame-for multithreaded codecs.
uint8_t * rd_scratchpad
scratchpad for rate distortion mb decision
Definition: mpegpicture.h:37
#define AVERROR(e)
Definition: error.h:43
uint64_t encoding_error[AV_NUM_DATA_POINTERS]
Definition: mpegpicture.h:90
#define MAX_PICTURE_COUNT
Definition: mpegpicture.h:32
int reference
Definition: mpegpicture.h:87
const char * r
Definition: vf_curves.c:107
int capabilities
Codec capabilities.
Definition: avcodec.h:3561
simple assert() macros that are a bit more flexible than ISO C assert().
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define fail()
Definition: checkasm.h:81
AVBufferRef * hwaccel_priv_buf
Definition: mpegpicture.h:76
AVBufferRef * motion_val_buf[2]
Definition: mpegpicture.h:52
int width
picture width / height.
Definition: avcodec.h:1836
int16_t(*[2] motion_val)[2]
Definition: mpegpicture.h:53
Picture.
Definition: mpegpicture.h:45
void * hwaccel_picture_private
Hardware accelerator private data.
Definition: mpegpicture.h:77
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define src
Definition: vp9dsp.c:530
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:248
uint16_t * mc_mb_var
Table for motion compensated MB variances.
Definition: mpegpicture.h:68
AVBufferRef * qscale_table_buf
Definition: mpegpicture.h:49
int alloc_mb_height
mb_height used to allocate tables
Definition: mpegpicture.h:71
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
Definition: utils.c:723
Libavcodec external API header.
enum AVCodecID codec_id
Definition: avcodec.h:1666
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
main external API structure.
Definition: avcodec.h:1649
int ff_alloc_picture(AVCodecContext *avctx, Picture *pic, MotionEstContext *me, ScratchpadContext *sc, int shared, int encoding, int chroma_x_shift, int chroma_y_shift, int out_format, int mb_stride, int mb_width, int mb_height, int b8_stride, ptrdiff_t *linesize, ptrdiff_t *uvlinesize)
Allocate a Picture.
Definition: mpegpicture.c:228
uint8_t * data
The data buffer.
Definition: buffer.h:89
AVBufferRef * av_buffer_allocz(int size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:82
int ff_mpeg_framesize_alloc(AVCodecContext *avctx, MotionEstContext *me, ScratchpadContext *sc, int linesize)
Definition: mpegpicture.c:56
int64_t mc_mb_var_sum
motion compensated MB variance for current frame
Definition: mpegpicture.h:82
struct AVFrame * f
Definition: mpegpicture.h:46
static int find_unused_picture(AVCodecContext *avctx, Picture *picture, int shared)
Definition: mpegpicture.c:408
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:484
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
int8_t * qscale_table
Definition: mpegpicture.h:50
void ff_mpeg_unref_picture(AVCodecContext *avctx, Picture *pic)
Deallocate a picture.
Definition: mpegpicture.c:291
#define MAKE_WRITABLE(table)
common internal and external API header
if(ret< 0)
Definition: vf_mcdeint.c:282
AVBufferRef * mbskip_table_buf
Definition: mpegpicture.h:58
int shared
Definition: mpegpicture.h:88
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:92
uint8_t * b_scratchpad
scratchpad used for writing into write only buffers
Definition: mpegpicture.h:39
int ff_update_picture_tables(Picture *dst, Picture *src)
Definition: mpegpicture.c:313
uint8_t * obmc_scratchpad
Definition: mpegpicture.h:38
int frame_priv_data_size
Size of per-frame hardware accelerator private data.
Definition: avcodec.h:3759
AVBufferRef * mc_mb_var_buf
Definition: mpegpicture.h:67
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1751
#define AV_CODEC_FLAG2_EXPORT_MVS
Export motion vectors through frame side data.
Definition: avcodec.h:930
int height
Definition: frame.h:236
uint32_t * mb_type
types and macros are defined in mpegutils.h
Definition: mpegpicture.h:56
#define av_freep(p)
uint8_t * temp
Definition: motion_est.h:56
#define AV_LOG_FATAL
Something went wrong and recovery is not possible.
Definition: log.h:170
int debug_mv
debug Code outside libavcodec should access this field using AVOptions
Definition: avcodec.h:2925
int64_t mb_var_sum
sum of MB variance for current frame
Definition: mpegpicture.h:81
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:1341
AVBufferRef * ref_index_buf[2]
Definition: mpegpicture.h:61