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/mem.h"
23 #include "libavutil/thread.h"
24 
25 #include "config.h"
26 
27 #include "avcodec.h"
28 #include "get_bits.h"
29 #include "bswapdsp.h"
30 #include "codec_internal.h"
31 #include "decode.h"
32 
33 #define MAX_HUFF_CODES 16
34 
35 #include "motionpixels_tablegen.h"
36 
37 typedef struct HuffCode {
38  uint8_t size;
39  uint8_t delta;
40 } HuffCode;
41 
42 typedef struct MotionPixelsContext {
46  uint8_t *changes_map;
53  uint8_t gradient_scale[3];
54  uint8_t *bswapbuf;
57 
59 {
61 
62  av_freep(&mp->changes_map);
63  av_freep(&mp->vpt);
64  av_freep(&mp->hpt);
65  av_freep(&mp->bswapbuf);
66  av_frame_free(&mp->frame);
67 
68  return 0;
69 }
70 
72 {
73  av_unused static AVOnce init_static_once = AV_ONCE_INIT;
75  int w4 = (avctx->width + 3) & ~3;
76  int h4 = (avctx->height + 3) & ~3;
77 
78  if(avctx->extradata_size < 2){
79  av_log(avctx, AV_LOG_ERROR, "extradata too small\n");
80  return AVERROR_INVALIDDATA;
81  }
82 
83  mp->avctx = avctx;
84  ff_bswapdsp_init(&mp->bdsp);
85  mp->changes_map = av_calloc(avctx->width, h4);
86  mp->offset_bits_len = av_log2(avctx->width * avctx->height) + 1;
87  mp->vpt = av_calloc(avctx->height, sizeof(*mp->vpt));
88  mp->hpt = av_calloc(h4 / 4, w4 / 4 * sizeof(*mp->hpt));
89  if (!mp->changes_map || !mp->vpt || !mp->hpt)
90  return AVERROR(ENOMEM);
91  avctx->pix_fmt = AV_PIX_FMT_RGB555;
92 
93  mp->frame = av_frame_alloc();
94  if (!mp->frame)
95  return AVERROR(ENOMEM);
96 
97 #if !CONFIG_HARDCODED_TABLES
98  ff_thread_once(&init_static_once, motionpixels_tableinit);
99 #endif
100 
101  return 0;
102 }
103 
104 static void mp_read_changes_map(MotionPixelsContext *mp, GetBitContext *gb, int count, int bits_len, int read_color)
105 {
106  uint16_t *pixels;
107  int offset, w, h, color = 0, x, y, i;
108 
109  while (count--) {
110  offset = get_bits_long(gb, mp->offset_bits_len);
111  w = get_bits(gb, bits_len) + 1;
112  h = get_bits(gb, bits_len) + 1;
113  if (read_color)
114  color = get_bits(gb, 15);
115  x = offset % mp->avctx->width;
116  y = offset / mp->avctx->width;
117  if (y >= mp->avctx->height)
118  continue;
119  w = FFMIN(w, mp->avctx->width - x);
120  h = FFMIN(h, mp->avctx->height - y);
121  pixels = (uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];
122  while (h--) {
123  mp->changes_map[offset] = w;
124  if (read_color)
125  for (i = 0; i < w; ++i)
126  pixels[i] = color;
127  offset += mp->avctx->width;
128  pixels += mp->frame->linesize[0] / 2;
129  }
130  }
131 }
132 
134 {
135  while (get_bits1(gb)) {
136  ++size;
137  if (size > mp->max_codes_bits) {
138  av_log(mp->avctx, AV_LOG_ERROR, "invalid code size %d/%d\n", size, mp->max_codes_bits);
139  return AVERROR_INVALIDDATA;
140  }
141  if (mp_get_code(mp, gb, size) < 0)
142  return AVERROR_INVALIDDATA;
143  }
144  if (mp->current_codes_count >= mp->codes_count) {
145  av_log(mp->avctx, AV_LOG_ERROR, "too many codes\n");
146  return AVERROR_INVALIDDATA;
147  }
148 
149  mp->codes[mp->current_codes_count++].size = size;
150  return 0;
151 }
152 
154 {
155  if (mp->codes_count == 1) {
156  mp->codes[0].delta = get_bits(gb, 4);
157  } else {
158  int i;
159  int ret;
160 
161  mp->max_codes_bits = get_bits(gb, 4);
162  for (i = 0; i < mp->codes_count; ++i)
163  mp->codes[i].delta = get_bits(gb, 4);
164  mp->current_codes_count = 0;
165  if ((ret = mp_get_code(mp, gb, 0)) < 0)
166  return ret;
167  if (mp->current_codes_count < mp->codes_count) {
168  av_log(mp->avctx, AV_LOG_ERROR, "too few codes\n");
169  return AVERROR_INVALIDDATA;
170  }
171  }
172  return 0;
173 }
174 
175 static av_always_inline int mp_gradient(MotionPixelsContext *mp, int component, int v)
176 {
177  int delta;
178 
179  delta = (v - 7) * mp->gradient_scale[component];
180  mp->gradient_scale[component] = (v == 0 || v == 14) ? 2 : 1;
181  return delta;
182 }
183 
185 {
186  int color;
187 
188  color = *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];
189  return mp_rgb_yuv_table[color & 0x7FFF];
190 }
191 
192 static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const YuvPixel *p)
193 {
194  int color;
195 
196  color = mp_yuv_to_rgb(p->y, p->v, p->u, 1);
197  *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2] = color;
198 }
199 
201 {
202  return mp->vlc.table ? get_vlc2(gb, mp->vlc.table, mp->max_codes_bits, 1)
203  : mp->codes[0].delta;
204 }
205 
207 {
208  YuvPixel p;
209  const int y0 = y * mp->avctx->width;
210  int w, i, x = 0;
211 
212  p = mp->vpt[y];
213  if (mp->changes_map[y0 + x] == 0) {
214  memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
215  ++x;
216  }
217  while (x < mp->avctx->width) {
218  w = mp->changes_map[y0 + x];
219  if (w != 0) {
220  if ((y & 3) == 0) {
221  if (mp->changes_map[y0 + x + mp->avctx->width] < w ||
222  mp->changes_map[y0 + x + mp->avctx->width * 2] < w ||
223  mp->changes_map[y0 + x + mp->avctx->width * 3] < w) {
224  for (i = (x + 3) & ~3; i < x + w; i += 4) {
225  mp->hpt[((y / 4) * mp->avctx->width + i) / 4] = mp_get_yuv_from_rgb(mp, i, y);
226  }
227  }
228  }
229  x += w;
230  memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
231  p = mp_get_yuv_from_rgb(mp, x - 1, y);
232  } else {
233  p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
234  p.y = av_clip_uintp2(p.y, 5);
235  if ((x & 3) == 0) {
236  if ((y & 3) == 0) {
237  p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
238  p.v = av_clip_intp2(p.v, 5);
239  p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
240  p.u = av_clip_intp2(p.u, 5);
241  mp->hpt[((y / 4) * mp->avctx->width + x) / 4] = p;
242  } else {
243  p.v = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].v;
244  p.u = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].u;
245  }
246  }
247  mp_set_rgb_from_yuv(mp, x, y, &p);
248  ++x;
249  }
250  }
251 }
252 
254 {
255  YuvPixel p;
256  int y, y0;
257 
258  av_assert1(mp->changes_map[0]);
259 
260  for (y = 0; y < mp->avctx->height; ++y) {
261  if (mp->changes_map[y * mp->avctx->width] != 0) {
262  memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
263  p = mp_get_yuv_from_rgb(mp, 0, y);
264  } else {
265  p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
266  p.y = av_clip_uintp2(p.y, 5);
267  if ((y & 3) == 0) {
268  p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
269  p.v = av_clip_intp2(p.v, 5);
270  p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
271  p.u = av_clip_intp2(p.u, 5);
272  }
273  mp->vpt[y] = p;
274  mp_set_rgb_from_yuv(mp, 0, y, &p);
275  }
276  }
277  for (y0 = 0; y0 < 2; ++y0)
278  for (y = y0; y < mp->avctx->height; y += 2)
279  mp_decode_line(mp, gb, y);
280 }
281 
282 static int mp_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
283  int *got_frame, AVPacket *avpkt)
284 {
285  const uint8_t *buf = avpkt->data;
286  int buf_size = avpkt->size;
287  MotionPixelsContext *mp = avctx->priv_data;
288  GetBitContext gb;
289  int i, count1, count2, sz, ret;
290 
291  if ((ret = ff_reget_buffer(avctx, mp->frame, 0)) < 0)
292  return ret;
293 
294  /* le32 bitstream msb first */
295  av_fast_padded_malloc(&mp->bswapbuf, &mp->bswapbuf_size, buf_size);
296  if (!mp->bswapbuf)
297  return AVERROR(ENOMEM);
298  mp->bdsp.bswap_buf((uint32_t *) mp->bswapbuf, (const uint32_t *) buf,
299  buf_size / 4);
300  if (buf_size & 3)
301  memcpy(mp->bswapbuf + (buf_size & ~3), buf + (buf_size & ~3), buf_size & 3);
302  init_get_bits(&gb, mp->bswapbuf, buf_size * 8);
303 
304  memset(mp->changes_map, 0, avctx->width * avctx->height);
305  for (i = !(avctx->extradata[1] & 2); i < 2; ++i) {
306  count1 = get_bits(&gb, 12);
307  count2 = get_bits(&gb, 12);
308  mp_read_changes_map(mp, &gb, count1, 8, i);
309  mp_read_changes_map(mp, &gb, count2, 4, i);
310  }
311 
312  mp->codes_count = get_bits(&gb, 4);
313  if (mp->codes_count == 0)
314  goto end;
315 
316  if (mp->changes_map[0] == 0) {
317  *(uint16_t *)mp->frame->data[0] = get_bits(&gb, 15);
318  mp->changes_map[0] = 1;
319  }
320  if (mp_read_codes_table(mp, &gb) < 0)
321  goto end;
322 
323  sz = get_bits(&gb, 18);
324  if (avctx->extradata[0] != 5)
325  sz += get_bits(&gb, 18);
326  if (sz == 0)
327  goto end;
328 
329  if (mp->codes_count > 1) {
330  /* The entries of the mp->codes array are sorted from right to left
331  * in the Huffman tree, hence -(int)sizeof(HuffCode). */
332  ret = ff_vlc_init_from_lengths(&mp->vlc, mp->max_codes_bits, mp->codes_count,
333  &mp->codes[mp->codes_count - 1].size, -(int)sizeof(HuffCode),
334  &mp->codes[mp->codes_count - 1].delta, -(int)sizeof(HuffCode), 1,
335  0, 0, avctx);
336  if (ret < 0)
337  goto end;
338  }
340  ff_vlc_free(&mp->vlc);
341 
342 end:
343  if ((ret = av_frame_ref(rframe, mp->frame)) < 0)
344  return ret;
345  *got_frame = 1;
346  return buf_size;
347 }
348 
350  .p.name = "motionpixels",
351  CODEC_LONG_NAME("Motion Pixels video"),
352  .p.type = AVMEDIA_TYPE_VIDEO,
353  .p.id = AV_CODEC_ID_MOTIONPIXELS,
354  .priv_data_size = sizeof(MotionPixelsContext),
355  .init = mp_decode_init,
356  .close = mp_decode_end,
358  .p.capabilities = AV_CODEC_CAP_DR1,
359  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
360 };
YuvPixel::y
int8_t y
Definition: motionpixels_tablegen.h:30
bswapdsp.h
ff_vlc_init_from_lengths
int ff_vlc_init_from_lengths(VLC *vlc, 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: vlc.c:306
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: codec_internal.h:42
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:512
thread.h
av_clip_uintp2
#define av_clip_uintp2
Definition: common.h:123
get_bits_long
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:421
MotionPixelsContext::gradient_scale
uint8_t gradient_scale[3]
Definition: motionpixels.c:53
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:160
mp
static double mp(int i, double w0, double r)
Definition: af_atilt.c:59
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:374
w
uint8_t w
Definition: llviddspenc.c:38
AVPacket::data
uint8_t * data
Definition: packet.h:524
MotionPixelsContext::max_codes_bits
int max_codes_bits
Definition: motionpixels.c:49
FFCodec
Definition: codec_internal.h:126
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:514
HuffCode::delta
uint8_t delta
Definition: motionpixels.c:39
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:335
MotionPixelsContext::offset_bits_len
int offset_bits_len
Definition: motionpixels.c:47
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:130
GetBitContext
Definition: get_bits.h:108
mp_decode_init
static av_cold int mp_decode_init(AVCodecContext *avctx)
Definition: motionpixels.c:71
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:104
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:148
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:205
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:44
mp_get_yuv_from_rgb
static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y)
Definition: motionpixels.c:184
HuffCode::size
uint8_t size
Definition: motionpixels.c:38
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:524
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:286
MotionPixelsContext::bswapbuf
uint8_t * bswapbuf
Definition: motionpixels.c:54
decode.h
get_bits.h
MotionPixelsContext::bdsp
BswapDSPContext bdsp
Definition: motionpixels.c:45
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:271
motionpixels_tableinit
static av_cold void motionpixels_tableinit(void)
Definition: motionpixels_tablegen.h:85
AV_ONCE_INIT
#define AV_ONCE_INIT
Definition: thread.h:203
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:120
mp_decode_frame_helper
static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb)
Definition: motionpixels.c:253
AV_CODEC_ID_MOTIONPIXELS
@ AV_CODEC_ID_MOTIONPIXELS
Definition: codec_id.h:171
mp_gradient
static av_always_inline int mp_gradient(MotionPixelsContext *mp, int component, int v)
Definition: motionpixels.c:175
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:388
mp_decode_frame
static int mp_decode_frame(AVCodecContext *avctx, AVFrame *rframe, int *got_frame, AVPacket *avpkt)
Definition: motionpixels.c:282
get_vlc2
static av_always_inline int get_vlc2(GetBitContext *s, const VLCElem *table, int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:652
AVOnce
#define AVOnce
Definition: thread.h:202
MotionPixelsContext
Definition: motionpixels.c:42
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:366
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:525
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:384
codec_internal.h
size
int size
Definition: twinvq_data.h:10344
color
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
MotionPixelsContext::avctx
AVCodecContext * avctx
Definition: motionpixels.c:43
MotionPixelsContext::current_codes_count
int current_codes_count
Definition: motionpixels.c:48
motionpixels_tablegen.h
MotionPixelsContext::vlc
VLC vlc
Definition: motionpixels.c:51
MotionPixelsContext::changes_map
uint8_t * changes_map
Definition: motionpixels.c:46
mp_get_vlc
static av_always_inline int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb)
Definition: motionpixels.c:200
MAX_HUFF_CODES
#define MAX_HUFF_CODES
Definition: motionpixels.c:33
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
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:523
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:133
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:56
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:52
AV_PIX_FMT_RGB555
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:466
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:192
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
MotionPixelsContext::codes
HuffCode codes[MAX_HUFF_CODES]
Definition: motionpixels.c:50
mp_read_codes_table
static int mp_read_codes_table(MotionPixelsContext *mp, GetBitContext *gb)
Definition: motionpixels.c:153
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const char * name
Name of the codec implementation.
Definition: codec.h:194
AVCodecContext::height
int height
Definition: avcodec.h:618
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:657
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:264
avcodec.h
ff_vlc_free
void ff_vlc_free(VLC *vlc)
Definition: vlc.c:580
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:1684
ret
ret
Definition: filter_design.txt:187
AVCodecContext
main external API structure.
Definition: avcodec.h:445
MotionPixelsContext::hpt
YuvPixel * hpt
Definition: motionpixels.c:52
VLC
Definition: vlc.h:36
mp_decode_line
static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y)
Definition: motionpixels.c:206
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
mem.h
YuvPixel::v
int8_t v
Definition: motionpixels_tablegen.h:30
MotionPixelsContext::bswapbuf_size
int bswapbuf_size
Definition: motionpixels.c:55
AVPacket
This structure stores compressed data.
Definition: packet.h:501
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:472
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:618
HuffCode
Definition: motionpixels.c:37
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
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:48
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
MotionPixelsContext::vpt
YuvPixel * vpt
Definition: motionpixels.c:52
ff_motionpixels_decoder
const FFCodec ff_motionpixels_decoder
Definition: motionpixels.c:349
mp_decode_end
static av_cold int mp_decode_end(AVCodecContext *avctx)
Definition: motionpixels.c:58