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cllc.c
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1 /*
2  * Canopus Lossless Codec decoder
3  *
4  * Copyright (c) 2012-2013 Derek Buitenhuis
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include <inttypes.h>
24 
25 #include "libavutil/intreadwrite.h"
26 #include "bswapdsp.h"
27 #include "canopus.h"
28 #include "get_bits.h"
29 #include "avcodec.h"
30 #include "internal.h"
31 #include "thread.h"
32 
33 #define VLC_BITS 7
34 #define VLC_DEPTH 2
35 
36 
37 typedef struct CLLCContext {
40 
43 } CLLCContext;
44 
46 {
47  uint8_t symbols[256];
48  uint8_t bits[256];
49  uint16_t codes[256];
50  int num_lens, num_codes, num_codes_sum, prefix;
51  int i, j, count;
52 
53  prefix = 0;
54  count = 0;
55  num_codes_sum = 0;
56 
57  num_lens = get_bits(gb, 5);
58 
59  if (num_lens > VLC_BITS * VLC_DEPTH) {
60  vlc->table = NULL;
61 
62  av_log(ctx->avctx, AV_LOG_ERROR, "To long VLCs %d\n", num_lens);
63  return AVERROR_INVALIDDATA;
64  }
65 
66  for (i = 0; i < num_lens; i++) {
67  num_codes = get_bits(gb, 9);
68  num_codes_sum += num_codes;
69 
70  if (num_codes_sum > 256) {
71  vlc->table = NULL;
72 
74  "Too many VLCs (%d) to be read.\n", num_codes_sum);
75  return AVERROR_INVALIDDATA;
76  }
77 
78  for (j = 0; j < num_codes; j++) {
79  symbols[count] = get_bits(gb, 8);
80  bits[count] = i + 1;
81  codes[count] = prefix++;
82 
83  count++;
84  }
85  if (prefix > (65535 - 256)/2) {
86  vlc->table = NULL;
87  return AVERROR_INVALIDDATA;
88  }
89 
90  prefix <<= 1;
91  }
92 
93  return ff_init_vlc_sparse(vlc, VLC_BITS, count, bits, 1, 1,
94  codes, 2, 2, symbols, 1, 1, 0);
95 }
96 
97 /*
98  * Unlike the RGB24 read/restore, which reads in a component at a time,
99  * ARGB read/restore reads in ARGB quads.
100  */
101 static int read_argb_line(CLLCContext *ctx, GetBitContext *gb, int *top_left,
102  VLC *vlc, uint8_t *outbuf)
103 {
104  uint8_t *dst;
105  int pred[4];
106  int code;
107  int i;
108 
109  OPEN_READER(bits, gb);
110 
111  dst = outbuf;
112  pred[0] = top_left[0];
113  pred[1] = top_left[1];
114  pred[2] = top_left[2];
115  pred[3] = top_left[3];
116 
117  for (i = 0; i < ctx->avctx->width; i++) {
118  /* Always get the alpha component */
119  UPDATE_CACHE(bits, gb);
120  GET_VLC(code, bits, gb, vlc[0].table, VLC_BITS, VLC_DEPTH);
121 
122  pred[0] += code;
123  dst[0] = pred[0];
124 
125  /* Skip the components if they are entirely transparent */
126  if (dst[0]) {
127  /* Red */
128  UPDATE_CACHE(bits, gb);
129  GET_VLC(code, bits, gb, vlc[1].table, VLC_BITS, VLC_DEPTH);
130 
131  pred[1] += code;
132  dst[1] = pred[1];
133 
134  /* Green */
135  UPDATE_CACHE(bits, gb);
136  GET_VLC(code, bits, gb, vlc[2].table, VLC_BITS, VLC_DEPTH);
137 
138  pred[2] += code;
139  dst[2] = pred[2];
140 
141  /* Blue */
142  UPDATE_CACHE(bits, gb);
143  GET_VLC(code, bits, gb, vlc[3].table, VLC_BITS, VLC_DEPTH);
144 
145  pred[3] += code;
146  dst[3] = pred[3];
147  } else {
148  dst[1] = 0;
149  dst[2] = 0;
150  dst[3] = 0;
151  }
152 
153  dst += 4;
154  }
155 
156  CLOSE_READER(bits, gb);
157 
158  top_left[0] = outbuf[0];
159 
160  /* Only stash components if they are not transparent */
161  if (top_left[0]) {
162  top_left[1] = outbuf[1];
163  top_left[2] = outbuf[2];
164  top_left[3] = outbuf[3];
165  }
166 
167  return 0;
168 }
169 
171  int *top_left, VLC *vlc, uint8_t *outbuf)
172 {
173  uint8_t *dst;
174  int pred, code;
175  int i;
176 
177  OPEN_READER(bits, gb);
178 
179  dst = outbuf;
180  pred = *top_left;
181 
182  /* Simultaneously read and restore the line */
183  for (i = 0; i < ctx->avctx->width; i++) {
184  UPDATE_CACHE(bits, gb);
185  GET_VLC(code, bits, gb, vlc->table, VLC_BITS, VLC_DEPTH);
186 
187  pred += code;
188  dst[0] = pred;
189  dst += 3;
190  }
191 
192  CLOSE_READER(bits, gb);
193 
194  /* Stash the first pixel */
195  *top_left = outbuf[0];
196 
197  return 0;
198 }
199 
201  int *top_left, VLC *vlc, uint8_t *outbuf,
202  int is_chroma)
203 {
204  int pred, code;
205  int i;
206 
207  OPEN_READER(bits, gb);
208 
209  pred = *top_left;
210 
211  /* Simultaneously read and restore the line */
212  for (i = 0; i < ctx->avctx->width >> is_chroma; i++) {
213  UPDATE_CACHE(bits, gb);
214  GET_VLC(code, bits, gb, vlc->table, VLC_BITS, VLC_DEPTH);
215 
216  pred += code;
217  outbuf[i] = pred;
218  }
219 
220  CLOSE_READER(bits, gb);
221 
222  /* Stash the first pixel */
223  *top_left = outbuf[0];
224 
225  return 0;
226 }
227 
229 {
230  AVCodecContext *avctx = ctx->avctx;
231  uint8_t *dst;
232  int pred[4];
233  int ret;
234  int i, j;
235  VLC vlc[4];
236 
237  pred[0] = 0;
238  pred[1] = 0x80;
239  pred[2] = 0x80;
240  pred[3] = 0x80;
241 
242  dst = pic->data[0];
243 
244  skip_bits(gb, 16);
245 
246  /* Read in code table for each plane */
247  for (i = 0; i < 4; i++) {
248  ret = read_code_table(ctx, gb, &vlc[i]);
249  if (ret < 0) {
250  for (j = 0; j <= i; j++)
251  ff_free_vlc(&vlc[j]);
252 
253  av_log(ctx->avctx, AV_LOG_ERROR,
254  "Could not read code table %d.\n", i);
255  return ret;
256  }
257  }
258 
259  /* Read in and restore every line */
260  for (i = 0; i < avctx->height; i++) {
261  read_argb_line(ctx, gb, pred, vlc, dst);
262 
263  dst += pic->linesize[0];
264  }
265 
266  for (i = 0; i < 4; i++)
267  ff_free_vlc(&vlc[i]);
268 
269  return 0;
270 }
271 
273 {
274  AVCodecContext *avctx = ctx->avctx;
275  uint8_t *dst;
276  int pred[3];
277  int ret;
278  int i, j;
279  VLC vlc[3];
280 
281  pred[0] = 0x80;
282  pred[1] = 0x80;
283  pred[2] = 0x80;
284 
285  dst = pic->data[0];
286 
287  skip_bits(gb, 16);
288 
289  /* Read in code table for each plane */
290  for (i = 0; i < 3; i++) {
291  ret = read_code_table(ctx, gb, &vlc[i]);
292  if (ret < 0) {
293  for (j = 0; j <= i; j++)
294  ff_free_vlc(&vlc[j]);
295 
296  av_log(ctx->avctx, AV_LOG_ERROR,
297  "Could not read code table %d.\n", i);
298  return ret;
299  }
300  }
301 
302  /* Read in and restore every line */
303  for (i = 0; i < avctx->height; i++) {
304  for (j = 0; j < 3; j++)
305  read_rgb24_component_line(ctx, gb, &pred[j], &vlc[j], &dst[j]);
306 
307  dst += pic->linesize[0];
308  }
309 
310  for (i = 0; i < 3; i++)
311  ff_free_vlc(&vlc[i]);
312 
313  return 0;
314 }
315 
317 {
318  AVCodecContext *avctx = ctx->avctx;
319  uint8_t block;
320  uint8_t *dst[3];
321  int pred[3];
322  int ret;
323  int i, j;
324  VLC vlc[2];
325 
326  pred[0] = 0x80;
327  pred[1] = 0x80;
328  pred[2] = 0x80;
329 
330  dst[0] = pic->data[0];
331  dst[1] = pic->data[1];
332  dst[2] = pic->data[2];
333 
334  skip_bits(gb, 8);
335 
336  block = get_bits(gb, 8);
337  if (block) {
338  avpriv_request_sample(ctx->avctx, "Blocked YUV");
339  return AVERROR_PATCHWELCOME;
340  }
341 
342  /* Read in code table for luma and chroma */
343  for (i = 0; i < 2; i++) {
344  ret = read_code_table(ctx, gb, &vlc[i]);
345  if (ret < 0) {
346  for (j = 0; j <= i; j++)
347  ff_free_vlc(&vlc[j]);
348 
349  av_log(ctx->avctx, AV_LOG_ERROR,
350  "Could not read code table %d.\n", i);
351  return ret;
352  }
353  }
354 
355  /* Read in and restore every line */
356  for (i = 0; i < avctx->height; i++) {
357  read_yuv_component_line(ctx, gb, &pred[0], &vlc[0], dst[0], 0); /* Y */
358  read_yuv_component_line(ctx, gb, &pred[1], &vlc[1], dst[1], 1); /* U */
359  read_yuv_component_line(ctx, gb, &pred[2], &vlc[1], dst[2], 1); /* V */
360 
361  for (j = 0; j < 3; j++)
362  dst[j] += pic->linesize[j];
363  }
364 
365  for (i = 0; i < 2; i++)
366  ff_free_vlc(&vlc[i]);
367 
368  return 0;
369 }
370 
371 static int cllc_decode_frame(AVCodecContext *avctx, void *data,
372  int *got_picture_ptr, AVPacket *avpkt)
373 {
374  CLLCContext *ctx = avctx->priv_data;
375  AVFrame *pic = data;
376  ThreadFrame frame = { .f = data };
377  uint8_t *src = avpkt->data;
378  uint32_t info_tag, info_offset;
379  int data_size;
380  GetBitContext gb;
381  int coding_type, ret;
382 
383  if (avpkt->size < 4 + 4) {
384  av_log(avctx, AV_LOG_ERROR, "Frame is too small %d.\n", avpkt->size);
385  return AVERROR_INVALIDDATA;
386  }
387 
388  info_offset = 0;
389  info_tag = AV_RL32(src);
390  if (info_tag == MKTAG('I', 'N', 'F', 'O')) {
391  info_offset = AV_RL32(src + 4);
392  if (info_offset > UINT32_MAX - 8 || info_offset + 8 > avpkt->size) {
393  av_log(avctx, AV_LOG_ERROR,
394  "Invalid INFO header offset: 0x%08"PRIX32" is too large.\n",
395  info_offset);
396  return AVERROR_INVALIDDATA;
397  }
398  ff_canopus_parse_info_tag(avctx, src + 8, info_offset);
399 
400  info_offset += 8;
401  src += info_offset;
402  }
403 
404  data_size = (avpkt->size - info_offset) & ~1;
405 
406  /* Make sure our bswap16'd buffer is big enough */
408  &ctx->swapped_buf_size, data_size);
409  if (!ctx->swapped_buf) {
410  av_log(avctx, AV_LOG_ERROR, "Could not allocate swapped buffer.\n");
411  return AVERROR(ENOMEM);
412  }
413 
414  /* bswap16 the buffer since CLLC's bitreader works in 16-bit words */
415  ctx->bdsp.bswap16_buf((uint16_t *) ctx->swapped_buf, (uint16_t *) src,
416  data_size / 2);
417 
418  if ((ret = init_get_bits8(&gb, ctx->swapped_buf, data_size)) < 0)
419  return ret;
420 
421  /*
422  * Read in coding type. The types are as follows:
423  *
424  * 0 - YUY2
425  * 1 - BGR24 (Triples)
426  * 2 - BGR24 (Quads)
427  * 3 - BGRA
428  */
429  coding_type = (AV_RL32(src) >> 8) & 0xFF;
430  av_log(avctx, AV_LOG_DEBUG, "Frame coding type: %d\n", coding_type);
431 
432  if(get_bits_left(&gb) < avctx->height * avctx->width)
433  return AVERROR_INVALIDDATA;
434 
435  switch (coding_type) {
436  case 0:
437  avctx->pix_fmt = AV_PIX_FMT_YUV422P;
438  avctx->bits_per_raw_sample = 8;
439 
440  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
441  return ret;
442 
443  ret = decode_yuv_frame(ctx, &gb, pic);
444  if (ret < 0)
445  return ret;
446 
447  break;
448  case 1:
449  case 2:
450  avctx->pix_fmt = AV_PIX_FMT_RGB24;
451  avctx->bits_per_raw_sample = 8;
452 
453  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
454  return ret;
455 
456  ret = decode_rgb24_frame(ctx, &gb, pic);
457  if (ret < 0)
458  return ret;
459 
460  break;
461  case 3:
462  avctx->pix_fmt = AV_PIX_FMT_ARGB;
463  avctx->bits_per_raw_sample = 8;
464 
465  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
466  return ret;
467 
468  ret = decode_argb_frame(ctx, &gb, pic);
469  if (ret < 0)
470  return ret;
471 
472  break;
473  default:
474  av_log(avctx, AV_LOG_ERROR, "Unknown coding type: %d.\n", coding_type);
475  return AVERROR_INVALIDDATA;
476  }
477 
478  pic->key_frame = 1;
480 
481  *got_picture_ptr = 1;
482 
483  return avpkt->size;
484 }
485 
486 #if HAVE_THREADS
487 static int cllc_init_thread_copy(AVCodecContext *avctx)
488 {
489  CLLCContext *ctx = avctx->priv_data;
490 
491  ctx->avctx = avctx;
492  ctx->swapped_buf = NULL;
493  ctx->swapped_buf_size = 0;
494 
495  return 0;
496 }
497 #endif
498 
500 {
501  CLLCContext *ctx = avctx->priv_data;
502 
503  av_freep(&ctx->swapped_buf);
504 
505  return 0;
506 }
507 
509 {
510  CLLCContext *ctx = avctx->priv_data;
511 
512  /* Initialize various context values */
513  ctx->avctx = avctx;
514  ctx->swapped_buf = NULL;
515  ctx->swapped_buf_size = 0;
516 
517  ff_bswapdsp_init(&ctx->bdsp);
518 
519  return 0;
520 }
521 
523  .name = "cllc",
524  .long_name = NULL_IF_CONFIG_SMALL("Canopus Lossless Codec"),
525  .type = AVMEDIA_TYPE_VIDEO,
526  .id = AV_CODEC_ID_CLLC,
527  .priv_data_size = sizeof(CLLCContext),
529  .init_thread_copy = ONLY_IF_THREADS_ENABLED(cllc_init_thread_copy),
530  .decode = cllc_decode_frame,
531  .close = cllc_decode_close,
533  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
534 };
#define NULL
Definition: coverity.c:32
static int read_rgb24_component_line(CLLCContext *ctx, GetBitContext *gb, int *top_left, VLC *vlc, uint8_t *outbuf)
Definition: cllc.c:170
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:261
static int init_thread_copy(AVCodecContext *avctx)
Definition: tta.c:392
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
void(* bswap16_buf)(uint16_t *dst, const uint16_t *src, int len)
Definition: bswapdsp.h:26
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int ff_canopus_parse_info_tag(AVCodecContext *avctx, const uint8_t *src, size_t size)
Definition: canopus.c:30
int ff_init_vlc_sparse(VLC *vlc_arg, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, const void *symbols, int symbols_wrap, int symbols_size, int flags)
Definition: bitstream.c:268
int size
Definition: avcodec.h:1400
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1690
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:121
static int cllc_decode_frame(AVCodecContext *avctx, void *data, int *got_picture_ptr, AVPacket *avpkt)
Definition: cllc.c:371
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2704
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3289
static int16_t block[64]
Definition: dct.c:115
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#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:40
uint8_t
#define av_cold
Definition: attributes.h:82
Multithreading support functions.
static AVFrame * frame
uint8_t * data
Definition: avcodec.h:1399
bitstream reader API header.
static av_cold int cllc_decode_close(AVCodecContext *avctx)
Definition: cllc.c:499
#define av_log(a,...)
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:587
static int read_code_table(CLLCContext *ctx, GetBitContext *gb, VLC *vlc)
Definition: cllc.c:45
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:160
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
BswapDSPContext bdsp
Definition: cllc.c:39
#define AVERROR(e)
Definition: error.h:43
static const struct endianess table[]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:190
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
uint8_t * swapped_buf
Definition: cllc.c:41
const char * name
Name of the codec implementation.
Definition: avcodec.h:3296
int swapped_buf_size
Definition: cllc.c:42
GLsizei count
Definition: opengl_enc.c:109
#define CLOSE_READER(name, gb)
Definition: get_bits.h:131
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:88
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1011
Definition: vlc.h:26
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:229
static int decode_rgb24_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
Definition: cllc.c:272
static int decode_argb_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
Definition: cllc.c:228
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:284
AVCodecContext * avctx
Definition: cllc.c:38
int width
picture width / height.
Definition: avcodec.h:1653
AVFormatContext * ctx
Definition: movenc.c:48
#define GET_VLC(code, name, gb, table, bits, max_depth)
If the vlc code is invalid and max_depth=1, then no bits will be removed.
Definition: get_bits.h:477
static const float pred[4]
Definition: siprdata.h:259
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:456
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:1481
#define OPEN_READER(name, gb)
Definition: get_bits.h:120
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:306
static int read_yuv_component_line(CLLCContext *ctx, GetBitContext *gb, int *top_left, VLC *vlc, uint8_t *outbuf, int is_chroma)
Definition: cllc.c:200
#define VLC_DEPTH
Definition: cllc.c:34
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
static av_cold int cllc_decode_init(AVCodecContext *avctx)
Definition: cllc.c:508
common internal api header.
static int read_argb_line(CLLCContext *ctx, GetBitContext *gb, int *top_left, VLC *vlc, uint8_t *outbuf)
Definition: cllc.c:101
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
void * priv_data
Definition: avcodec.h:1508
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:279
#define av_freep(p)
AVCodec ff_cllc_decoder
Definition: cllc.c:522
#define MKTAG(a, b, c, d)
Definition: common.h:342
static int decode_yuv_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
Definition: cllc.c:316
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1376
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:354
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:955
#define VLC_BITS
Definition: cllc.c:33