FFmpeg
motionpixels.c
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1 /*
2  * Motion Pixels Video Decoder
3  * Copyright (c) 2008 Gregory Montoir (cyx@users.sourceforge.net)
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/thread.h"
23 
24 #include "config.h"
25 
26 #include "avcodec.h"
27 #include "get_bits.h"
28 #include "bswapdsp.h"
29 #include "internal.h"
30 
31 #define MAX_HUFF_CODES 16
32 
33 #include "motionpixels_tablegen.h"
34 
35 typedef struct HuffCode {
36  uint8_t size;
37  uint8_t delta;
38 } HuffCode;
39 
40 typedef struct MotionPixelsContext {
44  uint8_t *changes_map;
51  uint8_t gradient_scale[3];
52  uint8_t *bswapbuf;
55 
57 {
59 
60  av_freep(&mp->changes_map);
61  av_freep(&mp->vpt);
62  av_freep(&mp->hpt);
63  av_freep(&mp->bswapbuf);
64  av_frame_free(&mp->frame);
65 
66  return 0;
67 }
68 
70 {
71  av_unused static AVOnce init_static_once = AV_ONCE_INIT;
73  int w4 = (avctx->width + 3) & ~3;
74  int h4 = (avctx->height + 3) & ~3;
75 
76  if(avctx->extradata_size < 2){
77  av_log(avctx, AV_LOG_ERROR, "extradata too small\n");
78  return AVERROR_INVALIDDATA;
79  }
80 
81  mp->avctx = avctx;
82  ff_bswapdsp_init(&mp->bdsp);
83  mp->changes_map = av_calloc(avctx->width, h4);
84  mp->offset_bits_len = av_log2(avctx->width * avctx->height) + 1;
85  mp->vpt = av_calloc(avctx->height, sizeof(*mp->vpt));
86  mp->hpt = av_calloc(h4 / 4, w4 / 4 * sizeof(*mp->hpt));
87  if (!mp->changes_map || !mp->vpt || !mp->hpt)
88  return AVERROR(ENOMEM);
89  avctx->pix_fmt = AV_PIX_FMT_RGB555;
90 
91  mp->frame = av_frame_alloc();
92  if (!mp->frame)
93  return AVERROR(ENOMEM);
94 
95 #if !CONFIG_HARDCODED_TABLES
96  ff_thread_once(&init_static_once, motionpixels_tableinit);
97 #endif
98 
99  return 0;
100 }
101 
102 static void mp_read_changes_map(MotionPixelsContext *mp, GetBitContext *gb, int count, int bits_len, int read_color)
103 {
104  uint16_t *pixels;
105  int offset, w, h, color = 0, x, y, i;
106 
107  while (count--) {
108  offset = get_bits_long(gb, mp->offset_bits_len);
109  w = get_bits(gb, bits_len) + 1;
110  h = get_bits(gb, bits_len) + 1;
111  if (read_color)
112  color = get_bits(gb, 15);
113  x = offset % mp->avctx->width;
114  y = offset / mp->avctx->width;
115  if (y >= mp->avctx->height)
116  continue;
117  w = FFMIN(w, mp->avctx->width - x);
118  h = FFMIN(h, mp->avctx->height - y);
119  pixels = (uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];
120  while (h--) {
121  mp->changes_map[offset] = w;
122  if (read_color)
123  for (i = 0; i < w; ++i)
124  pixels[i] = color;
125  offset += mp->avctx->width;
126  pixels += mp->frame->linesize[0] / 2;
127  }
128  }
129 }
130 
132 {
133  while (get_bits1(gb)) {
134  ++size;
135  if (size > mp->max_codes_bits) {
136  av_log(mp->avctx, AV_LOG_ERROR, "invalid code size %d/%d\n", size, mp->max_codes_bits);
137  return AVERROR_INVALIDDATA;
138  }
139  if (mp_get_code(mp, gb, size) < 0)
140  return AVERROR_INVALIDDATA;
141  }
142  if (mp->current_codes_count >= mp->codes_count) {
143  av_log(mp->avctx, AV_LOG_ERROR, "too many codes\n");
144  return AVERROR_INVALIDDATA;
145  }
146 
147  mp->codes[mp->current_codes_count++].size = size;
148  return 0;
149 }
150 
152 {
153  if (mp->codes_count == 1) {
154  mp->codes[0].delta = get_bits(gb, 4);
155  } else {
156  int i;
157  int ret;
158 
159  mp->max_codes_bits = get_bits(gb, 4);
160  for (i = 0; i < mp->codes_count; ++i)
161  mp->codes[i].delta = get_bits(gb, 4);
162  mp->current_codes_count = 0;
163  if ((ret = mp_get_code(mp, gb, 0)) < 0)
164  return ret;
165  if (mp->current_codes_count < mp->codes_count) {
166  av_log(mp->avctx, AV_LOG_ERROR, "too few codes\n");
167  return AVERROR_INVALIDDATA;
168  }
169  }
170  return 0;
171 }
172 
173 static av_always_inline int mp_gradient(MotionPixelsContext *mp, int component, int v)
174 {
175  int delta;
176 
177  delta = (v - 7) * mp->gradient_scale[component];
178  mp->gradient_scale[component] = (v == 0 || v == 14) ? 2 : 1;
179  return delta;
180 }
181 
183 {
184  int color;
185 
186  color = *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];
187  return mp_rgb_yuv_table[color];
188 }
189 
190 static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const YuvPixel *p)
191 {
192  int color;
193 
194  color = mp_yuv_to_rgb(p->y, p->v, p->u, 1);
195  *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2] = color;
196 }
197 
199 {
200  return mp->vlc.table ? get_vlc2(gb, mp->vlc.table, mp->max_codes_bits, 1)
201  : mp->codes[0].delta;
202 }
203 
205 {
206  YuvPixel p;
207  const int y0 = y * mp->avctx->width;
208  int w, i, x = 0;
209 
210  p = mp->vpt[y];
211  if (mp->changes_map[y0 + x] == 0) {
212  memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
213  ++x;
214  }
215  while (x < mp->avctx->width) {
216  w = mp->changes_map[y0 + x];
217  if (w != 0) {
218  if ((y & 3) == 0) {
219  if (mp->changes_map[y0 + x + mp->avctx->width] < w ||
220  mp->changes_map[y0 + x + mp->avctx->width * 2] < w ||
221  mp->changes_map[y0 + x + mp->avctx->width * 3] < w) {
222  for (i = (x + 3) & ~3; i < x + w; i += 4) {
223  mp->hpt[((y / 4) * mp->avctx->width + i) / 4] = mp_get_yuv_from_rgb(mp, i, y);
224  }
225  }
226  }
227  x += w;
228  memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
229  p = mp_get_yuv_from_rgb(mp, x - 1, y);
230  } else {
231  p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
232  p.y = av_clip_uintp2(p.y, 5);
233  if ((x & 3) == 0) {
234  if ((y & 3) == 0) {
235  p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
236  p.v = av_clip_intp2(p.v, 5);
237  p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
238  p.u = av_clip_intp2(p.u, 5);
239  mp->hpt[((y / 4) * mp->avctx->width + x) / 4] = p;
240  } else {
241  p.v = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].v;
242  p.u = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].u;
243  }
244  }
245  mp_set_rgb_from_yuv(mp, x, y, &p);
246  ++x;
247  }
248  }
249 }
250 
252 {
253  YuvPixel p;
254  int y, y0;
255 
256  av_assert1(mp->changes_map[0]);
257 
258  for (y = 0; y < mp->avctx->height; ++y) {
259  if (mp->changes_map[y * mp->avctx->width] != 0) {
260  memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
261  p = mp_get_yuv_from_rgb(mp, 0, y);
262  } else {
263  p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
264  p.y = av_clip_uintp2(p.y, 5);
265  if ((y & 3) == 0) {
266  p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
267  p.v = av_clip_intp2(p.v, 5);
268  p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
269  p.u = av_clip_intp2(p.u, 5);
270  }
271  mp->vpt[y] = p;
272  mp_set_rgb_from_yuv(mp, 0, y, &p);
273  }
274  }
275  for (y0 = 0; y0 < 2; ++y0)
276  for (y = y0; y < mp->avctx->height; y += 2)
277  mp_decode_line(mp, gb, y);
278 }
279 
280 static int mp_decode_frame(AVCodecContext *avctx,
281  void *data, int *got_frame,
282  AVPacket *avpkt)
283 {
284  const uint8_t *buf = avpkt->data;
285  int buf_size = avpkt->size;
286  MotionPixelsContext *mp = avctx->priv_data;
287  GetBitContext gb;
288  int i, count1, count2, sz, ret;
289 
290  if ((ret = ff_reget_buffer(avctx, mp->frame, 0)) < 0)
291  return ret;
292 
293  /* le32 bitstream msb first */
294  av_fast_padded_malloc(&mp->bswapbuf, &mp->bswapbuf_size, buf_size);
295  if (!mp->bswapbuf)
296  return AVERROR(ENOMEM);
297  mp->bdsp.bswap_buf((uint32_t *) mp->bswapbuf, (const uint32_t *) buf,
298  buf_size / 4);
299  if (buf_size & 3)
300  memcpy(mp->bswapbuf + (buf_size & ~3), buf + (buf_size & ~3), buf_size & 3);
301  init_get_bits(&gb, mp->bswapbuf, buf_size * 8);
302 
303  memset(mp->changes_map, 0, avctx->width * avctx->height);
304  for (i = !(avctx->extradata[1] & 2); i < 2; ++i) {
305  count1 = get_bits(&gb, 12);
306  count2 = get_bits(&gb, 12);
307  mp_read_changes_map(mp, &gb, count1, 8, i);
308  mp_read_changes_map(mp, &gb, count2, 4, i);
309  }
310 
311  mp->codes_count = get_bits(&gb, 4);
312  if (mp->codes_count == 0)
313  goto end;
314 
315  if (mp->changes_map[0] == 0) {
316  *(uint16_t *)mp->frame->data[0] = get_bits(&gb, 15);
317  mp->changes_map[0] = 1;
318  }
319  if (mp_read_codes_table(mp, &gb) < 0)
320  goto end;
321 
322  sz = get_bits(&gb, 18);
323  if (avctx->extradata[0] != 5)
324  sz += get_bits(&gb, 18);
325  if (sz == 0)
326  goto end;
327 
328  if (mp->codes_count > 1) {
329  /* The entries of the mp->codes array are sorted from right to left
330  * in the Huffman tree, hence -(int)sizeof(HuffCode). */
331  ret = ff_init_vlc_from_lengths(&mp->vlc, mp->max_codes_bits, mp->codes_count,
332  &mp->codes[mp->codes_count - 1].size, -(int)sizeof(HuffCode),
333  &mp->codes[mp->codes_count - 1].delta, -(int)sizeof(HuffCode), 1,
334  0, 0, avctx);
335  if (ret < 0)
336  goto end;
337  }
339  ff_free_vlc(&mp->vlc);
340 
341 end:
342  if ((ret = av_frame_ref(data, mp->frame)) < 0)
343  return ret;
344  *got_frame = 1;
345  return buf_size;
346 }
347 
349  .name = "motionpixels",
350  .long_name = NULL_IF_CONFIG_SMALL("Motion Pixels video"),
351  .type = AVMEDIA_TYPE_VIDEO,
353  .priv_data_size = sizeof(MotionPixelsContext),
354  .init = mp_decode_init,
355  .close = mp_decode_end,
357  .capabilities = AV_CODEC_CAP_DR1,
359 };
YuvPixel::y
int8_t y
Definition: motionpixels_tablegen.h:30
AVCodec
AVCodec.
Definition: codec.h:202
bswapdsp.h
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:42
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
YuvPixel
Definition: motionpixels_tablegen.h:29
color
Definition: vf_paletteuse.c:587
thread.h
av_clip_uintp2
#define av_clip_uintp2
Definition: common.h:120
get_bits_long
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:547
MotionPixelsContext::gradient_scale
uint8_t gradient_scale[3]
Definition: motionpixels.c:51
av_unused
#define av_unused
Definition: attributes.h:131
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:112
mp
static double mp(int i, double w0, double r)
Definition: af_atilt.c:79
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
w
uint8_t w
Definition: llviddspenc.c:38
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:373
MotionPixelsContext::max_codes_bits
int max_codes_bits
Definition: motionpixels.c:47
data
const char data[16]
Definition: mxf.c:143
get_vlc2
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:798
mp_decode_frame
static int mp_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: motionpixels.c:280
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:660
HuffCode::delta
uint8_t delta
Definition: motionpixels.c:37
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:380
MotionPixelsContext::offset_bits_len
int offset_bits_len
Definition: motionpixels.c:45
ff_motionpixels_decoder
const AVCodec ff_motionpixels_decoder
Definition: motionpixels.c:348
GetBitContext
Definition: get_bits.h:62
mp_decode_init
static av_cold int mp_decode_init(AVCodecContext *avctx)
Definition: motionpixels.c:69
mp_read_changes_map
static void mp_read_changes_map(MotionPixelsContext *mp, GetBitContext *gb, int count, int bits_len, int read_color)
Definition: motionpixels.c:102
ff_init_vlc_from_lengths
int ff_init_vlc_from_lengths(VLC *vlc_arg, int nb_bits, int nb_codes, const int8_t *lens, int lens_wrap, const void *symbols, int symbols_wrap, int symbols_size, int offset, int flags, void *logctx)
Build VLC decoding tables suitable for use with get_vlc2()
Definition: bitstream.c:381
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:99
mp_yuv_to_rgb
static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb)
Definition: motionpixels_tablegen.h:33
ff_thread_once
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:175
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
MotionPixelsContext::frame
AVFrame * frame
Definition: motionpixels.c:42
mp_get_yuv_from_rgb
static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y)
Definition: motionpixels.c:182
HuffCode::size
uint8_t size
Definition: motionpixels.c:36
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:485
MotionPixelsContext::bswapbuf
uint8_t * bswapbuf
Definition: motionpixels.c:52
get_bits.h
MotionPixelsContext::bdsp
BswapDSPContext bdsp
Definition: motionpixels.c:43
ff_free_vlc
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:431
motionpixels_tableinit
static av_cold void motionpixels_tableinit(void)
Definition: motionpixels_tablegen.h:85
AV_ONCE_INIT
#define AV_ONCE_INIT
Definition: thread.h:173
ff_bswapdsp_init
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
av_clip_intp2
#define av_clip_intp2
Definition: common.h:117
mp_decode_frame_helper
static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb)
Definition: motionpixels.c:251
AV_CODEC_ID_MOTIONPIXELS
@ AV_CODEC_ID_MOTIONPIXELS
Definition: codec_id.h:169
mp_gradient
static av_always_inline int mp_gradient(MotionPixelsContext *mp, int component, int v)
Definition: motionpixels.c:173
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:499
AVOnce
#define AVOnce
Definition: thread.h:172
MotionPixelsContext
Definition: motionpixels.c:40
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:374
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
av_frame_ref
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:327
size
int size
Definition: twinvq_data.h:10344
color
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:92
MotionPixelsContext::avctx
AVCodecContext * avctx
Definition: motionpixels.c:41
MotionPixelsContext::current_codes_count
int current_codes_count
Definition: motionpixels.c:46
motionpixels_tablegen.h
MotionPixelsContext::vlc
VLC vlc
Definition: motionpixels.c:49
MotionPixelsContext::changes_map
uint8_t * changes_map
Definition: motionpixels.c:44
mp_get_vlc
static av_always_inline int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb)
Definition: motionpixels.c:198
MAX_HUFF_CODES
#define MAX_HUFF_CODES
Definition: motionpixels.c:31
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
i
int i
Definition: input.c:406
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:484
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:50
mp_rgb_yuv_table
static YuvPixel mp_rgb_yuv_table[1<< 15]
Definition: motionpixels_tablegen.h:51
mp_get_code
static int mp_get_code(MotionPixelsContext *mp, GetBitContext *gb, int size)
Definition: motionpixels.c:131
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
delta
float delta
Definition: vorbis_enc_data.h:430
av_fast_padded_malloc
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:50
AV_PIX_FMT_RGB555
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:377
av_always_inline
#define av_always_inline
Definition: attributes.h:49
mp_set_rgb_from_yuv
static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const YuvPixel *p)
Definition: motionpixels.c:190
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
MotionPixelsContext::codes
HuffCode codes[MAX_HUFF_CODES]
Definition: motionpixels.c:48
mp_read_codes_table
static int mp_read_codes_table(MotionPixelsContext *mp, GetBitContext *gb)
Definition: motionpixels.c:151
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:209
AVCodecContext::height
int height
Definition: avcodec.h:556
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:593
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:271
avcodec.h
ff_reget_buffer
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available.
Definition: decode.c:1759
ret
ret
Definition: filter_design.txt:187
AVCodecContext
main external API structure.
Definition: avcodec.h:383
MotionPixelsContext::hpt
YuvPixel * hpt
Definition: motionpixels.c:50
VLC
Definition: vlc.h:26
mp_decode_line
static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y)
Definition: motionpixels.c:204
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
YuvPixel::v
int8_t v
Definition: motionpixels_tablegen.h:30
MotionPixelsContext::bswapbuf_size
int bswapbuf_size
Definition: motionpixels.c:53
AVPacket
This structure stores compressed data.
Definition: packet.h:350
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:410
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:556
HuffCode
Definition: motionpixels.c:35
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
BswapDSPContext
Definition: bswapdsp.h:24
h
h
Definition: vp9dsp_template.c:2038
YuvPixel::u
int8_t u
Definition: motionpixels_tablegen.h:30
MotionPixelsContext::codes_count
int codes_count
Definition: motionpixels.c:46
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
MotionPixelsContext::vpt
YuvPixel * vpt
Definition: motionpixels.c:50
mp_decode_end
static av_cold int mp_decode_end(AVCodecContext *avctx)
Definition: motionpixels.c:56