FFmpeg
rawdec.c
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1 /*
2  * Raw Video Decoder
3  * Copyright (c) 2001 Fabrice Bellard
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 /**
23  * @file
24  * Raw Video Decoder
25  */
26 
27 #include "avcodec.h"
28 #include "bswapdsp.h"
29 #include "get_bits.h"
30 #include "internal.h"
31 #include "raw.h"
32 #include "libavutil/avassert.h"
33 #include "libavutil/buffer.h"
34 #include "libavutil/common.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/imgutils.h"
37 #include "libavutil/opt.h"
38 
39 typedef struct RawVideoContext {
42  int frame_size; /* size of the frame in bytes */
43  int flip;
44  int is_1_2_4_8_bpp; // 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut
45  int is_mono;
46  int is_pal8;
49  int is_yuv2;
50  int is_lt_16bpp; // 16bpp pixfmt and bits_per_coded_sample < 16
51  int tff;
52 
55  unsigned int bitstream_buf_size;
57 
58 static const AVOption options[]={
59 {"top", "top field first", offsetof(RawVideoContext, tff), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM},
60 {NULL}
61 };
62 
63 static const AVClass rawdec_class = {
64  .class_name = "rawdec",
65  .option = options,
66  .version = LIBAVUTIL_VERSION_INT,
67 };
68 
70 {
72  const AVPixFmtDescriptor *desc;
73 
74  ff_bswapdsp_init(&context->bbdsp);
75 
76  if ( avctx->codec_tag == MKTAG('r','a','w',' ')
77  || avctx->codec_tag == MKTAG('N','O','1','6'))
79  avctx->bits_per_coded_sample);
80  else if (avctx->codec_tag == MKTAG('W', 'R', 'A', 'W'))
82  avctx->bits_per_coded_sample);
83  else if (avctx->codec_tag && (avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0))
85  else if (avctx->pix_fmt == AV_PIX_FMT_NONE && avctx->bits_per_coded_sample)
87  avctx->bits_per_coded_sample);
88 
89  desc = av_pix_fmt_desc_get(avctx->pix_fmt);
90  if (!desc) {
91  av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
92  return AVERROR(EINVAL);
93  }
94 
95  if (desc->flags & (AV_PIX_FMT_FLAG_PAL | FF_PSEUDOPAL)) {
97  if (!context->palette)
98  return AVERROR(ENOMEM);
99 #if FF_API_PSEUDOPAL
100  if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
101  avpriv_set_systematic_pal2((uint32_t*)context->palette->data, avctx->pix_fmt);
102 #endif
103  else {
104  memset(context->palette->data, 0, AVPALETTE_SIZE);
105  if (avctx->bits_per_coded_sample == 1)
106  memset(context->palette->data, 0xff, 4);
107  }
108  }
109 
110  if ((avctx->extradata_size >= 9 &&
111  !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
112  avctx->codec_tag == MKTAG('c','y','u','v') ||
113  avctx->codec_tag == MKTAG(3, 0, 0, 0) ||
114  avctx->codec_tag == MKTAG('W','R','A','W'))
115  context->flip = 1;
116 
117  if (avctx->pix_fmt == AV_PIX_FMT_MONOWHITE ||
118  avctx->pix_fmt == AV_PIX_FMT_MONOBLACK)
119  context->is_mono = 1;
120  else if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
121  context->is_pal8 = 1;
122 
123  if (avctx->codec_tag == MKTAG('B','1','W','0') ||
124  avctx->codec_tag == MKTAG('B','0','W','1'))
125  context->is_nut_mono = 1;
126  else if (avctx->codec_tag == MKTAG('P','A','L',8))
127  context->is_nut_pal8 = 1;
128 
129  if (avctx->codec_tag == AV_RL32("yuv2") &&
130  avctx->pix_fmt == AV_PIX_FMT_YUYV422)
131  context->is_yuv2 = 1;
132 
133  return 0;
134 }
135 
136 static void flip(AVCodecContext *avctx, AVFrame *frame)
137 {
138  frame->data[0] += frame->linesize[0] * (avctx->height - 1);
139  frame->linesize[0] *= -1;
140 }
141 
142 /*
143  * Scale sample to 16-bit resolution
144  */
145 #define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
146 
147 /**
148  * Scale buffer to 16 bits per coded sample resolution
149  */
150 #define MKSCALE16(name, r16, w16) \
151 static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
152 { \
153  int i; \
154  if (!packed) { \
155  for (i = 0; i + 1 < buf_size; i += 2) \
156  w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
157  } else { \
158  GetBitContext gb; \
159  init_get_bits(&gb, buf, buf_size * 8); \
160  for (i = 0; i < avctx->width * avctx->height; i++) { \
161  int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
162  w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
163  } \
164  } \
165 }
166 
167 MKSCALE16(scale16be, AV_RB16, AV_WB16)
168 MKSCALE16(scale16le, AV_RL16, AV_WL16)
169 
170 static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame,
171  AVPacket *avpkt)
172 {
173  const AVPixFmtDescriptor *desc;
174  RawVideoContext *context = avctx->priv_data;
175  const uint8_t *buf = avpkt->data;
176  int buf_size = avpkt->size;
177  int linesize_align = 4;
178  int stride;
179  int res, len;
180  int need_copy;
181 
182  AVFrame *frame = data;
183 
184  if (avctx->width <= 0) {
185  av_log(avctx, AV_LOG_ERROR, "width is not set\n");
186  return AVERROR_INVALIDDATA;
187  }
188  if (avctx->height <= 0) {
189  av_log(avctx, AV_LOG_ERROR, "height is not set\n");
190  return AVERROR_INVALIDDATA;
191  }
192 
193  if (context->is_nut_mono)
194  stride = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
195  else if (context->is_nut_pal8)
196  stride = avctx->width;
197  else
198  stride = avpkt->size / avctx->height;
199 
200  av_log(avctx, AV_LOG_DEBUG, "PACKET SIZE: %d, STRIDE: %d\n", avpkt->size, stride);
201 
202  if (stride == 0 || avpkt->size < stride * avctx->height) {
203  av_log(avctx, AV_LOG_ERROR, "Packet too small (%d)\n", avpkt->size);
204  return AVERROR_INVALIDDATA;
205  }
206 
207  desc = av_pix_fmt_desc_get(avctx->pix_fmt);
208 
209  if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4 ||
210  avctx->bits_per_coded_sample == 2 || avctx->bits_per_coded_sample == 1 ||
211  (avctx->bits_per_coded_sample == 0 && (context->is_nut_pal8 || context->is_mono)) ) &&
212  (context->is_mono || context->is_pal8) &&
213  (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' ') ||
214  context->is_nut_mono || context->is_nut_pal8)) {
215  context->is_1_2_4_8_bpp = 1;
216  if (context->is_mono) {
217  int row_bytes = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
218  context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
219  FFALIGN(row_bytes, 16) * 8,
220  avctx->height, 1);
221  } else
222  context->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
223  FFALIGN(avctx->width, 16),
224  avctx->height, 1);
225  } else {
226  context->is_lt_16bpp = av_get_bits_per_pixel(desc) == 16 && avctx->bits_per_coded_sample && avctx->bits_per_coded_sample < 16;
227  context->frame_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width,
228  avctx->height, 1);
229  }
230  if (context->frame_size < 0)
231  return context->frame_size;
232 
233  need_copy = !avpkt->buf || context->is_1_2_4_8_bpp || context->is_yuv2 || context->is_lt_16bpp;
234 
235  frame->pict_type = AV_PICTURE_TYPE_I;
236  frame->key_frame = 1;
237 
238  res = ff_decode_frame_props(avctx, frame);
239  if (res < 0)
240  return res;
241 
242  frame->pkt_pos = avctx->internal->last_pkt_props->pos;
243  frame->pkt_duration = avctx->internal->last_pkt_props->duration;
244 
245  if (context->tff >= 0) {
246  frame->interlaced_frame = 1;
247  frame->top_field_first = context->tff;
248  }
249 
250  if ((res = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
251  return res;
252 
253  if (need_copy)
254  frame->buf[0] = av_buffer_alloc(FFMAX(context->frame_size, buf_size));
255  else
256  frame->buf[0] = av_buffer_ref(avpkt->buf);
257  if (!frame->buf[0])
258  return AVERROR(ENOMEM);
259 
260  // 1, 2, 4 and 8 bpp in avi/mov, 1 and 8 bpp in nut
261  if (context->is_1_2_4_8_bpp) {
262  int i, j, row_pix = 0;
263  uint8_t *dst = frame->buf[0]->data;
264  buf_size = context->frame_size - (context->is_pal8 ? AVPALETTE_SIZE : 0);
265  if (avctx->bits_per_coded_sample == 8 || context->is_nut_pal8 || context->is_mono) {
266  int pix_per_byte = context->is_mono ? 8 : 1;
267  for (i = 0, j = 0; j < buf_size && i<avpkt->size; i++, j++) {
268  dst[j] = buf[i];
269  row_pix += pix_per_byte;
270  if (row_pix >= avctx->width) {
271  i += stride - (i % stride) - 1;
272  j += 16 - (j % 16) - 1;
273  row_pix = 0;
274  }
275  }
276  } else if (avctx->bits_per_coded_sample == 4) {
277  for (i = 0, j = 0; 2 * j + 1 < buf_size && i<avpkt->size; i++, j++) {
278  dst[2 * j + 0] = buf[i] >> 4;
279  dst[2 * j + 1] = buf[i] & 15;
280  row_pix += 2;
281  if (row_pix >= avctx->width) {
282  i += stride - (i % stride) - 1;
283  j += 8 - (j % 8) - 1;
284  row_pix = 0;
285  }
286  }
287  } else if (avctx->bits_per_coded_sample == 2) {
288  for (i = 0, j = 0; 4 * j + 3 < buf_size && i<avpkt->size; i++, j++) {
289  dst[4 * j + 0] = buf[i] >> 6;
290  dst[4 * j + 1] = buf[i] >> 4 & 3;
291  dst[4 * j + 2] = buf[i] >> 2 & 3;
292  dst[4 * j + 3] = buf[i] & 3;
293  row_pix += 4;
294  if (row_pix >= avctx->width) {
295  i += stride - (i % stride) - 1;
296  j += 4 - (j % 4) - 1;
297  row_pix = 0;
298  }
299  }
300  } else {
301  av_assert0(avctx->bits_per_coded_sample == 1);
302  for (i = 0, j = 0; 8 * j + 7 < buf_size && i<avpkt->size; i++, j++) {
303  dst[8 * j + 0] = buf[i] >> 7;
304  dst[8 * j + 1] = buf[i] >> 6 & 1;
305  dst[8 * j + 2] = buf[i] >> 5 & 1;
306  dst[8 * j + 3] = buf[i] >> 4 & 1;
307  dst[8 * j + 4] = buf[i] >> 3 & 1;
308  dst[8 * j + 5] = buf[i] >> 2 & 1;
309  dst[8 * j + 6] = buf[i] >> 1 & 1;
310  dst[8 * j + 7] = buf[i] & 1;
311  row_pix += 8;
312  if (row_pix >= avctx->width) {
313  i += stride - (i % stride) - 1;
314  j += 2 - (j % 2) - 1;
315  row_pix = 0;
316  }
317  }
318  }
319  linesize_align = 16;
320  buf = dst;
321  } else if (context->is_lt_16bpp) {
322  uint8_t *dst = frame->buf[0]->data;
323  int packed = (avctx->codec_tag & 0xFFFFFF) == MKTAG('B','I','T', 0);
324  int swap = avctx->codec_tag >> 24;
325 
326  if (packed && swap) {
327  av_fast_padded_malloc(&context->bitstream_buf, &context->bitstream_buf_size, buf_size);
328  if (!context->bitstream_buf)
329  return AVERROR(ENOMEM);
330  if (swap == 16)
331  context->bbdsp.bswap16_buf(context->bitstream_buf, (const uint16_t*)buf, buf_size / 2);
332  else if (swap == 32)
333  context->bbdsp.bswap_buf(context->bitstream_buf, (const uint32_t*)buf, buf_size / 4);
334  else
335  return AVERROR_INVALIDDATA;
336  buf = context->bitstream_buf;
337  }
338 
339  if (desc->flags & AV_PIX_FMT_FLAG_BE)
340  scale16be(avctx, dst, buf, buf_size, packed);
341  else
342  scale16le(avctx, dst, buf, buf_size, packed);
343 
344  buf = dst;
345  } else if (need_copy) {
346  memcpy(frame->buf[0]->data, buf, buf_size);
347  buf = frame->buf[0]->data;
348  }
349 
350  if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
351  avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
352  buf += buf_size - context->frame_size;
353 
354  len = context->frame_size - (avctx->pix_fmt==AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0);
355  if (buf_size < len && ((avctx->codec_tag & 0xFFFFFF) != MKTAG('B','I','T', 0) || !need_copy)) {
356  av_log(avctx, AV_LOG_ERROR, "Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size, len);
357  av_buffer_unref(&frame->buf[0]);
358  return AVERROR(EINVAL);
359  }
360 
361  if ((res = av_image_fill_arrays(frame->data, frame->linesize,
362  buf, avctx->pix_fmt,
363  avctx->width, avctx->height, 1)) < 0) {
364  av_buffer_unref(&frame->buf[0]);
365  return res;
366  }
367 
368  if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
369  int pal_size;
371  &pal_size);
372  int ret;
373 
374  if (pal && pal_size != AVPALETTE_SIZE) {
375  av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", pal_size);
376  pal = NULL;
377  }
378 
379  if (!context->palette)
381  if (!context->palette) {
382  av_buffer_unref(&frame->buf[0]);
383  return AVERROR(ENOMEM);
384  }
385  ret = av_buffer_make_writable(&context->palette);
386  if (ret < 0) {
387  av_buffer_unref(&frame->buf[0]);
388  return ret;
389  }
390 
391  if (pal) {
392  memcpy(context->palette->data, pal, AVPALETTE_SIZE);
393  frame->palette_has_changed = 1;
394  } else if (context->is_nut_pal8) {
395  int vid_size = avctx->width * avctx->height;
396  int pal_size = avpkt->size - vid_size;
397 
398  if (avpkt->size > vid_size && pal_size <= AVPALETTE_SIZE) {
399  pal = avpkt->data + vid_size;
400  memcpy(context->palette->data, pal, pal_size);
401  frame->palette_has_changed = 1;
402  }
403  }
404  }
405 
406  if ((avctx->pix_fmt==AV_PIX_FMT_RGB24 ||
407  avctx->pix_fmt==AV_PIX_FMT_BGR24 ||
408  avctx->pix_fmt==AV_PIX_FMT_GRAY8 ||
409  avctx->pix_fmt==AV_PIX_FMT_RGB555LE ||
410  avctx->pix_fmt==AV_PIX_FMT_RGB555BE ||
411  avctx->pix_fmt==AV_PIX_FMT_RGB565LE ||
412  avctx->pix_fmt==AV_PIX_FMT_MONOWHITE ||
413  avctx->pix_fmt==AV_PIX_FMT_MONOBLACK ||
414  avctx->pix_fmt==AV_PIX_FMT_PAL8) &&
415  FFALIGN(frame->linesize[0], linesize_align) * avctx->height <= buf_size)
416  frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align);
417 
418  if (avctx->pix_fmt == AV_PIX_FMT_NV12 && avctx->codec_tag == MKTAG('N', 'V', '1', '2') &&
419  FFALIGN(frame->linesize[0], linesize_align) * avctx->height +
420  FFALIGN(frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
421  int la0 = FFALIGN(frame->linesize[0], linesize_align);
422  frame->data[1] += (la0 - frame->linesize[0]) * avctx->height;
423  frame->linesize[0] = la0;
424  frame->linesize[1] = FFALIGN(frame->linesize[1], linesize_align);
425  }
426 
427  if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) ||
428  (desc->flags & FF_PSEUDOPAL)) {
429  frame->buf[1] = av_buffer_ref(context->palette);
430  if (!frame->buf[1]) {
431  av_buffer_unref(&frame->buf[0]);
432  return AVERROR(ENOMEM);
433  }
434  frame->data[1] = frame->buf[1]->data;
435  }
436 
437  if (avctx->pix_fmt == AV_PIX_FMT_BGR24 &&
438  ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
439  frame->linesize[0] = (frame->linesize[0] + 3) & ~3;
440 
441  if (context->flip)
442  flip(avctx, frame);
443 
444  if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') ||
445  avctx->codec_tag == MKTAG('Y', 'V', '1', '6') ||
446  avctx->codec_tag == MKTAG('Y', 'V', '2', '4') ||
447  avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
448  FFSWAP(uint8_t *, frame->data[1], frame->data[2]);
449 
450  if (avctx->codec_tag == AV_RL32("I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
451  frame->data[1] = frame->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
452  frame->data[2] = frame->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
453  }
454 
455  if (avctx->codec_tag == AV_RL32("yuv2") &&
456  avctx->pix_fmt == AV_PIX_FMT_YUYV422) {
457  int x, y;
458  uint8_t *line = frame->data[0];
459  for (y = 0; y < avctx->height; y++) {
460  for (x = 0; x < avctx->width; x++)
461  line[2 * x + 1] ^= 0x80;
462  line += frame->linesize[0];
463  }
464  }
465 
466  if (avctx->codec_tag == AV_RL32("b64a") &&
467  avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {
468  uint8_t *dst = frame->data[0];
469  uint64_t v;
470  int x;
471  for (x = 0; x >> 3 < avctx->width * avctx->height; x += 8) {
472  v = AV_RB64(&dst[x]);
473  AV_WB64(&dst[x], v << 16 | v >> 48);
474  }
475  }
476 
477  if (avctx->field_order > AV_FIELD_PROGRESSIVE) { /* we have interlaced material flagged in container */
478  frame->interlaced_frame = 1;
479  if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
480  frame->top_field_first = 1;
481  }
482 
483  *got_frame = 1;
484  return buf_size;
485 }
486 
488 {
490 
491  av_buffer_unref(&context->palette);
492  return 0;
493 }
494 
496  .name = "rawvideo",
497  .long_name = NULL_IF_CONFIG_SMALL("raw video"),
498  .type = AVMEDIA_TYPE_VIDEO,
499  .id = AV_CODEC_ID_RAWVIDEO,
500  .priv_data_size = sizeof(RawVideoContext),
502  .close = raw_close_decoder,
503  .decode = raw_decode,
504  .priv_class = &rawdec_class,
505  .capabilities = AV_CODEC_CAP_PARAM_CHANGE,
506 };
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
int av_buffer_make_writable(AVBufferRef **pbuf)
Create a writable reference from a given buffer reference, avoiding data copy if possible.
Definition: buffer.c:151
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int is_nut_mono
Definition: rawdec.c:47
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:125
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
void(* bswap16_buf)(uint16_t *dst, const uint16_t *src, int len)
Definition: bswapdsp.h:26
AVCodec ff_rawvideo_decoder
Definition: rawdec.c:495
AVOption.
Definition: opt.h:246
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:566
misc image utilities
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:486
const char * desc
Definition: nvenc.c:68
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2474
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:108
int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4], const uint8_t *src, enum AVPixelFormat pix_fmt, int width, int height, int align)
Setup the data pointers and linesizes based on the specified image parameters and the provided array...
Definition: imgutils.c:411
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1778
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:70
int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
Set various frame properties from the codec context / packet data.
Definition: decode.c:1737
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
static const AVOption options[]
Definition: rawdec.c:58
int frame_size
Definition: rawdec.c:42
AVCodec.
Definition: avcodec.h:3492
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
Definition: pixfmt.h:106
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t
#define av_cold
Definition: attributes.h:82
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
AVOptions.
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
Definition: imgutils.c:152
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:205
const PixelFormatTag ff_raw_pix_fmt_tags[]
Definition: raw.c:31
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1669
BswapDSPContext bbdsp
Definition: rawdec.c:53
unsigned int bitstream_buf_size
Definition: rawdec.c:55
bitstream reader API header.
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:442
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2792
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
Return the size in bytes of the amount of data required to store an image with the given parameters...
Definition: imgutils.c:431
int is_lt_16bpp
Definition: rawdec.c:50
int is_1_2_4_8_bpp
Definition: rawdec.c:44
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
Definition: avcodec.h:1193
void * bitstream_buf
Definition: rawdec.c:54
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:350
AVBufferRef * palette
Definition: rawdec.c:41
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (firs...
Definition: pixfmt.h:89
Definition: graph2dot.c:48
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3499
#define FFMAX(a, b)
Definition: common.h:94
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:282
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:378
Raw Video Codec.
static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: rawdec.c:170
#define AV_PIX_FMT_FLAG_PSEUDOPAL
The pixel format is "pseudo-paletted".
Definition: pixdesc.h:166
int is_nut_pal8
Definition: rawdec.c:48
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
Definition: utils.c:467
Libavcodec external API header.
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown...
Definition: frame.h:574
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
#define AV_OPT_FLAG_VIDEO_PARAM
Definition: opt.h:279
main external API structure.
Definition: avcodec.h:1568
uint8_t * data
The data buffer.
Definition: buffer.h:89
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> (&#39;D&#39;<<24) + (&#39;C&#39;<<16) + (&#39;B&#39;<<8) + &#39;A&#39;).
Definition: avcodec.h:1593
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:67
void * buf
Definition: avisynth_c.h:766
int extradata_size
Definition: avcodec.h:1670
Describe the class of an AVClass context structure.
Definition: log.h:67
static av_cold int raw_close_decoder(AVCodecContext *avctx)
Definition: rawdec.c:487
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:277
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:452
refcounted data buffer API
AVClass * av_class
Definition: rawdec.c:40
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
Definition: pixfmt.h:107
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
#define MKSCALE16(name, r16, w16)
Scale buffer to 16 bits per coded sample resolution.
Definition: rawdec.c:150
A reference to a data buffer.
Definition: buffer.h:81
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:76
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
Y , 8bpp.
Definition: pixfmt.h:74
common internal api header.
common internal and external API header
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:75
#define AV_CODEC_CAP_PARAM_CHANGE
Codec supports changed parameters at any point.
Definition: avcodec.h:1048
static av_cold int raw_init_decoder(AVCodecContext *avctx)
Definition: rawdec.c:69
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:128
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
void * priv_data
Definition: avcodec.h:1595
#define FF_PSEUDOPAL
Definition: internal.h:367
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:447
int len
const PixelFormatTag avpriv_pix_fmt_bps_avi[]
Definition: raw.c:315
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:373
const PixelFormatTag avpriv_pix_fmt_bps_mov[]
Definition: raw.c:328
#define FFSWAP(type, a, b)
Definition: common.h:99
#define stride
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
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 default minimum maximum flags name is the option keep it simple and lowercase description are in without and describe what they for example set the foo of the bar offset is the offset of the field in your local context
#define MKTAG(a, b, c, d)
Definition: common.h:366
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1457
static const AVClass rawdec_class
Definition: rawdec.c:63