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hapdec.c
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1 /*
2  * Vidvox Hap decoder
3  * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
4  * Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com>
5  *
6  * HapQA and HAPAlphaOnly added by Jokyo Images
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 /**
26  * @file
27  * Hap decoder
28  *
29  * Fourcc: Hap1, Hap5, HapY, HapA, HapM
30  *
31  * https://github.com/Vidvox/hap/blob/master/documentation/HapVideoDRAFT.md
32  */
33 
34 #include <stdint.h>
35 
36 #include "libavutil/imgutils.h"
37 
38 #include "avcodec.h"
39 #include "bytestream.h"
40 #include "hap.h"
41 #include "internal.h"
42 #include "snappy.h"
43 #include "texturedsp.h"
44 #include "thread.h"
45 
47 {
48  GetByteContext *gbc = &ctx->gbc;
49  int section_size;
50  enum HapSectionType section_type;
51  int is_first_table = 1, had_offsets = 0, had_compressors = 0, had_sizes = 0;
52  int i, ret;
53 
54  while (size > 0) {
55  int stream_remaining = bytestream2_get_bytes_left(gbc);
56  ret = ff_hap_parse_section_header(gbc, &section_size, &section_type);
57  if (ret != 0)
58  return ret;
59 
60  size -= stream_remaining - bytestream2_get_bytes_left(gbc);
61 
62  switch (section_type) {
64  ret = ff_hap_set_chunk_count(ctx, section_size, is_first_table);
65  if (ret != 0)
66  return ret;
67  for (i = 0; i < section_size; i++) {
68  ctx->chunks[i].compressor = bytestream2_get_byte(gbc) << 4;
69  }
70  had_compressors = 1;
71  is_first_table = 0;
72  break;
73  case HAP_ST_SIZE_TABLE:
74  ret = ff_hap_set_chunk_count(ctx, section_size / 4, is_first_table);
75  if (ret != 0)
76  return ret;
77  for (i = 0; i < section_size / 4; i++) {
78  ctx->chunks[i].compressed_size = bytestream2_get_le32(gbc);
79  }
80  had_sizes = 1;
81  is_first_table = 0;
82  break;
84  ret = ff_hap_set_chunk_count(ctx, section_size / 4, is_first_table);
85  if (ret != 0)
86  return ret;
87  for (i = 0; i < section_size / 4; i++) {
88  ctx->chunks[i].compressed_offset = bytestream2_get_le32(gbc);
89  }
90  had_offsets = 1;
91  is_first_table = 0;
92  break;
93  default:
94  break;
95  }
96  size -= section_size;
97  }
98 
99  if (!had_sizes || !had_compressors)
100  return AVERROR_INVALIDDATA;
101 
102  /* The offsets table is optional. If not present than calculate offsets by
103  * summing the sizes of preceding chunks. */
104  if (!had_offsets) {
105  size_t running_size = 0;
106  for (i = 0; i < ctx->chunk_count; i++) {
107  ctx->chunks[i].compressed_offset = running_size;
108  running_size += ctx->chunks[i].compressed_size;
109  }
110  }
111 
112  return 0;
113 }
114 
116 {
117  int i;
118  size_t running_offset = 0;
119  for (i = 0; i < ctx->chunk_count; i++) {
120  if (ctx->chunks[i].compressed_offset != running_offset
121  || ctx->chunks[i].compressor != HAP_COMP_NONE)
122  return 0;
123  running_offset += ctx->chunks[i].compressed_size;
124  }
125  return 1;
126 }
127 
129 {
130  HapContext *ctx = avctx->priv_data;
131  GetByteContext *gbc = &ctx->gbc;
132  int section_size;
133  enum HapSectionType section_type;
134  const char *compressorstr;
135  int i, ret;
136 
137  ret = ff_hap_parse_section_header(gbc, &ctx->texture_section_size, &section_type);
138  if (ret != 0)
139  return ret;
140 
141  if ((avctx->codec_tag == MKTAG('H','a','p','1') && (section_type & 0x0F) != HAP_FMT_RGBDXT1) ||
142  (avctx->codec_tag == MKTAG('H','a','p','5') && (section_type & 0x0F) != HAP_FMT_RGBADXT5) ||
143  (avctx->codec_tag == MKTAG('H','a','p','Y') && (section_type & 0x0F) != HAP_FMT_YCOCGDXT5) ||
144  (avctx->codec_tag == MKTAG('H','a','p','A') && (section_type & 0x0F) != HAP_FMT_RGTC1) ||
145  ((avctx->codec_tag == MKTAG('H','a','p','M') && (section_type & 0x0F) != HAP_FMT_RGTC1) &&
146  (section_type & 0x0F) != HAP_FMT_YCOCGDXT5)) {
147  av_log(avctx, AV_LOG_ERROR,
148  "Invalid texture format %#04x.\n", section_type & 0x0F);
149  return AVERROR_INVALIDDATA;
150  }
151 
152  switch (section_type & 0xF0) {
153  case HAP_COMP_NONE:
154  case HAP_COMP_SNAPPY:
155  ret = ff_hap_set_chunk_count(ctx, 1, 1);
156  if (ret == 0) {
157  ctx->chunks[0].compressor = section_type & 0xF0;
158  ctx->chunks[0].compressed_offset = 0;
160  }
161  if (ctx->chunks[0].compressor == HAP_COMP_NONE) {
162  compressorstr = "none";
163  } else {
164  compressorstr = "snappy";
165  }
166  break;
167  case HAP_COMP_COMPLEX:
168  ret = ff_hap_parse_section_header(gbc, &section_size, &section_type);
169  if (ret == 0 && section_type != HAP_ST_DECODE_INSTRUCTIONS)
170  ret = AVERROR_INVALIDDATA;
171  if (ret == 0)
172  ret = hap_parse_decode_instructions(ctx, section_size);
173  compressorstr = "complex";
174  break;
175  default:
176  ret = AVERROR_INVALIDDATA;
177  break;
178  }
179 
180  if (ret != 0)
181  return ret;
182 
183  /* Check the frame is valid and read the uncompressed chunk sizes */
184  ctx->tex_size = 0;
185  for (i = 0; i < ctx->chunk_count; i++) {
186  HapChunk *chunk = &ctx->chunks[i];
187 
188  /* Check the compressed buffer is valid */
190  return AVERROR_INVALIDDATA;
191 
192  /* Chunks are unpacked sequentially, ctx->tex_size is the uncompressed
193  * size thus far */
194  chunk->uncompressed_offset = ctx->tex_size;
195 
196  /* Fill out uncompressed size */
197  if (chunk->compressor == HAP_COMP_SNAPPY) {
198  GetByteContext gbc_tmp;
199  int64_t uncompressed_size;
200  bytestream2_init(&gbc_tmp, gbc->buffer + chunk->compressed_offset,
201  chunk->compressed_size);
202  uncompressed_size = ff_snappy_peek_uncompressed_length(&gbc_tmp);
203  if (uncompressed_size < 0) {
204  return uncompressed_size;
205  }
206  chunk->uncompressed_size = uncompressed_size;
207  } else if (chunk->compressor == HAP_COMP_NONE) {
208  chunk->uncompressed_size = chunk->compressed_size;
209  } else {
210  return AVERROR_INVALIDDATA;
211  }
212  ctx->tex_size += chunk->uncompressed_size;
213  }
214 
215  av_log(avctx, AV_LOG_DEBUG, "%s compressor\n", compressorstr);
216 
217  return ret;
218 }
219 
220 static int decompress_chunks_thread(AVCodecContext *avctx, void *arg,
221  int chunk_nb, int thread_nb)
222 {
223  HapContext *ctx = avctx->priv_data;
224 
225  HapChunk *chunk = &ctx->chunks[chunk_nb];
226  GetByteContext gbc;
227  uint8_t *dst = ctx->tex_buf + chunk->uncompressed_offset;
228 
229  bytestream2_init(&gbc, ctx->gbc.buffer + chunk->compressed_offset, chunk->compressed_size);
230 
231  if (chunk->compressor == HAP_COMP_SNAPPY) {
232  int ret;
233  int64_t uncompressed_size = ctx->tex_size;
234 
235  /* Uncompress the frame */
236  ret = ff_snappy_uncompress(&gbc, dst, &uncompressed_size);
237  if (ret < 0) {
238  av_log(avctx, AV_LOG_ERROR, "Snappy uncompress error\n");
239  return ret;
240  }
241  } else if (chunk->compressor == HAP_COMP_NONE) {
242  bytestream2_get_buffer(&gbc, dst, chunk->compressed_size);
243  }
244 
245  return 0;
246 }
247 
249  int slice, int thread_nb, int texture_num)
250 {
251  HapContext *ctx = avctx->priv_data;
252  AVFrame *frame = arg;
253  const uint8_t *d = ctx->tex_data;
254  int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
255  int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
256  int x, y;
257  int start_slice, end_slice;
258  int base_blocks_per_slice = h_block / ctx->slice_count;
259  int remainder_blocks = h_block % ctx->slice_count;
260 
261  /* When the frame height (in blocks) doesn't divide evenly between the
262  * number of slices, spread the remaining blocks evenly between the first
263  * operations */
264  start_slice = slice * base_blocks_per_slice;
265  /* Add any extra blocks (one per slice) that have been added before this slice */
266  start_slice += FFMIN(slice, remainder_blocks);
267 
268  end_slice = start_slice + base_blocks_per_slice;
269  /* Add an extra block if there are still remainder blocks to be accounted for */
270  if (slice < remainder_blocks)
271  end_slice++;
272 
273  for (y = start_slice; y < end_slice; y++) {
274  uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
275  int off = y * w_block;
276  for (x = 0; x < w_block; x++) {
277  if (texture_num == 0) {
278  ctx->tex_fun(p + x * 4 * ctx->uncompress_pix_size, frame->linesize[0],
279  d + (off + x) * ctx->tex_rat);
280  } else {
281  ctx->tex_fun2(p + x * 4 * ctx->uncompress_pix_size, frame->linesize[0],
282  d + (off + x) * ctx->tex_rat2);
283  }
284  }
285  }
286 
287  return 0;
288 }
289 
291  int slice, int thread_nb)
292 {
293  return decompress_texture_thread_internal(avctx, arg, slice, thread_nb, 0);
294 }
295 
297  int slice, int thread_nb)
298 {
299  return decompress_texture_thread_internal(avctx, arg, slice, thread_nb, 1);
300 }
301 
302 static int hap_decode(AVCodecContext *avctx, void *data,
303  int *got_frame, AVPacket *avpkt)
304 {
305  HapContext *ctx = avctx->priv_data;
306  ThreadFrame tframe;
307  int ret, i, t;
308  int tex_size;
309  int section_size;
310  enum HapSectionType section_type;
311  int start_texture_section = 0;
312  int tex_rat[2] = {0, 0};
313 
314  bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);
315 
316  tex_rat[0] = ctx->tex_rat;
317 
318  /* check for multi texture header */
319  if (ctx->texture_count == 2) {
320  ret = ff_hap_parse_section_header(&ctx->gbc, &section_size, &section_type);
321  if (ret != 0)
322  return ret;
323  if ((section_type & 0x0F) != 0x0D) {
324  av_log(avctx, AV_LOG_ERROR, "Invalid section type in 2 textures mode %#04x.\n", section_type);
325  return AVERROR_INVALIDDATA;
326  }
327  start_texture_section = 4;
328  tex_rat[1] = ctx->tex_rat2;
329  }
330 
331  /* Get the output frame ready to receive data */
332  tframe.f = data;
333  ret = ff_thread_get_buffer(avctx, &tframe, 0);
334  if (ret < 0)
335  return ret;
336 
337  for (t = 0; t < ctx->texture_count; t++) {
338  bytestream2_seek(&ctx->gbc, start_texture_section, SEEK_SET);
339 
340  /* Check for section header */
341  ret = hap_parse_frame_header(avctx);
342  if (ret < 0)
343  return ret;
344 
345  start_texture_section += ctx->texture_section_size + 4;
346 
347  if (avctx->codec->update_thread_context)
348  ff_thread_finish_setup(avctx);
349 
350  /* Unpack the DXT texture */
351  if (hap_can_use_tex_in_place(ctx)) {
352  /* Only DXTC texture compression in a contiguous block */
353  ctx->tex_data = ctx->gbc.buffer;
354  tex_size = FFMIN(ctx->texture_section_size, bytestream2_get_bytes_left(&ctx->gbc));
355  } else {
356  /* Perform the second-stage decompression */
357  ret = av_reallocp(&ctx->tex_buf, ctx->tex_size);
358  if (ret < 0)
359  return ret;
360 
361  avctx->execute2(avctx, decompress_chunks_thread, NULL,
362  ctx->chunk_results, ctx->chunk_count);
363 
364  for (i = 0; i < ctx->chunk_count; i++) {
365  if (ctx->chunk_results[i] < 0)
366  return ctx->chunk_results[i];
367  }
368 
369  ctx->tex_data = ctx->tex_buf;
370  tex_size = ctx->tex_size;
371  }
372 
373  if (tex_size < (avctx->coded_width / TEXTURE_BLOCK_W)
374  *(avctx->coded_height / TEXTURE_BLOCK_H)
375  *tex_rat[t]) {
376  av_log(avctx, AV_LOG_ERROR, "Insufficient data\n");
377  return AVERROR_INVALIDDATA;
378  }
379 
380  /* Use the decompress function on the texture, one block per thread */
381  if (t == 0){
382  avctx->execute2(avctx, decompress_texture_thread, tframe.f, NULL, ctx->slice_count);
383  } else{
384  tframe.f = data;
385  avctx->execute2(avctx, decompress_texture2_thread, tframe.f, NULL, ctx->slice_count);
386  }
387  }
388 
389  /* Frame is ready to be output */
390  tframe.f->pict_type = AV_PICTURE_TYPE_I;
391  tframe.f->key_frame = 1;
392  *got_frame = 1;
393 
394  return avpkt->size;
395 }
396 
397 static av_cold int hap_init(AVCodecContext *avctx)
398 {
399  HapContext *ctx = avctx->priv_data;
400  const char *texture_name;
401  int ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
402 
403  if (ret < 0) {
404  av_log(avctx, AV_LOG_ERROR, "Invalid video size %dx%d.\n",
405  avctx->width, avctx->height);
406  return ret;
407  }
408 
409  /* Since codec is based on 4x4 blocks, size is aligned to 4 */
410  avctx->coded_width = FFALIGN(avctx->width, TEXTURE_BLOCK_W);
411  avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);
412 
413  ff_texturedsp_init(&ctx->dxtc);
414 
415  ctx->texture_count = 1;
416  ctx->uncompress_pix_size = 4;
417 
418  switch (avctx->codec_tag) {
419  case MKTAG('H','a','p','1'):
420  texture_name = "DXT1";
421  ctx->tex_rat = 8;
422  ctx->tex_fun = ctx->dxtc.dxt1_block;
423  avctx->pix_fmt = AV_PIX_FMT_RGB0;
424  break;
425  case MKTAG('H','a','p','5'):
426  texture_name = "DXT5";
427  ctx->tex_rat = 16;
428  ctx->tex_fun = ctx->dxtc.dxt5_block;
429  avctx->pix_fmt = AV_PIX_FMT_RGBA;
430  break;
431  case MKTAG('H','a','p','Y'):
432  texture_name = "DXT5-YCoCg-scaled";
433  ctx->tex_rat = 16;
434  ctx->tex_fun = ctx->dxtc.dxt5ys_block;
435  avctx->pix_fmt = AV_PIX_FMT_RGB0;
436  break;
437  case MKTAG('H','a','p','A'):
438  texture_name = "RGTC1";
439  ctx->tex_rat = 8;
440  ctx->tex_fun = ctx->dxtc.rgtc1u_gray_block;
441  avctx->pix_fmt = AV_PIX_FMT_GRAY8;
442  ctx->uncompress_pix_size = 1;
443  break;
444  case MKTAG('H','a','p','M'):
445  texture_name = "DXT5-YCoCg-scaled / RGTC1";
446  ctx->tex_rat = 16;
447  ctx->tex_rat2 = 8;
448  ctx->tex_fun = ctx->dxtc.dxt5ys_block;
449  ctx->tex_fun2 = ctx->dxtc.rgtc1u_alpha_block;
450  avctx->pix_fmt = AV_PIX_FMT_RGBA;
451  ctx->texture_count = 2;
452  break;
453  default:
455  }
456 
457  av_log(avctx, AV_LOG_DEBUG, "%s texture\n", texture_name);
458 
459  ctx->slice_count = av_clip(avctx->thread_count, 1,
460  avctx->coded_height / TEXTURE_BLOCK_H);
461 
462  return 0;
463 }
464 
465 static av_cold int hap_close(AVCodecContext *avctx)
466 {
467  HapContext *ctx = avctx->priv_data;
468 
469  ff_hap_free_context(ctx);
470 
471  return 0;
472 }
473 
475  .name = "hap",
476  .long_name = NULL_IF_CONFIG_SMALL("Vidvox Hap"),
477  .type = AVMEDIA_TYPE_VIDEO,
478  .id = AV_CODEC_ID_HAP,
479  .init = hap_init,
480  .decode = hap_decode,
481  .close = hap_close,
482  .priv_data_size = sizeof(HapContext),
485  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
487 };
#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:48
Definition: hap.h:61
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1529
#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:218
HapChunk * chunks
Definition: hap.h:72
static int hap_can_use_tex_in_place(HapContext *ctx)
Definition: hapdec.c:115
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1707
HapSectionType
Definition: hap.h:46
int(* dxt1_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:46
misc image utilities
AVFrame * f
Definition: thread.h:35
int(* tex_fun)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: hap.h:90
int tex_rat2
Definition: hap.h:76
Texture block (4x4) module.
int size
Definition: avcodec.h:1433
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1729
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
size_t compressed_size
Definition: hap.h:56
int ff_hap_parse_section_header(GetByteContext *gbc, int *section_size, enum HapSectionType *section_type)
Definition: hap.c:57
int compressed_offset
Definition: hap.h:55
AVCodec.
Definition: avcodec.h:3410
size_t uncompressed_size
Definition: hap.h:58
int64_t ff_snappy_peek_uncompressed_length(GetByteContext *gb)
Get the uncompressed length of an input buffer compressed using the Snappy algorithm.
Definition: snappy.c:131
#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
int(* rgtc1u_gray_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:56
uint8_t
#define av_cold
Definition: attributes.h:82
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
Definition: pixfmt.h:238
static int hap_parse_decode_instructions(HapContext *ctx, int size)
Definition: hapdec.c:46
Multithreading support functions.
AVCodec ff_hap_decoder
Definition: hapdec.c:474
int ff_hap_set_chunk_count(HapContext *ctx, int count, int first_in_frame)
Definition: hap.c:28
static AVFrame * frame
#define TEXTURE_BLOCK_H
Definition: texturedsp.h:43
TextureDSPContext dxtc
Definition: hap.h:64
uint8_t * data
Definition: avcodec.h:1432
const uint8_t * buffer
Definition: bytestream.h:34
static av_cold int hap_init(AVCodecContext *avctx)
Definition: hapdec.c:397
ptrdiff_t size
Definition: opengl_enc.c:101
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
#define FFALIGN(x, a)
Definition: macros.h:48
GetByteContext gbc
Definition: hap.h:65
#define av_log(a,...)
static int hap_decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: hapdec.c:302
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int * chunk_results
Definition: hap.h:73
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:263
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
const char * arg
Definition: jacosubdec.c:66
const char * name
Name of the codec implementation.
Definition: avcodec.h:3417
int(* dxt5_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:51
int(* tex_fun2)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: hap.h:91
static int decompress_texture_thread_internal(AVCodecContext *avctx, void *arg, int slice, int thread_nb, int texture_num)
Definition: hapdec.c:248
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1017
int ff_snappy_uncompress(GetByteContext *gb, uint8_t *buf, int64_t *size)
Decompress an input buffer using Snappy algorithm.
Definition: snappy.c:141
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
static av_cold int hap_close(AVCodecContext *avctx)
Definition: hapdec.c:465
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
av_cold void ff_texturedsp_init(TextureDSPContext *c)
Definition: texturedsp.c:637
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:301
int uncompressed_offset
Definition: hap.h:57
#define FFMIN(a, b)
Definition: common.h:96
int width
picture width / height.
Definition: avcodec.h:1692
AVFormatContext * ctx
Definition: movenc.c:48
int tex_rat
Definition: hap.h:75
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2771
Snappy decompression.
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1021
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:163
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
av_cold void ff_hap_free_context(HapContext *ctx)
Definition: hap.c:50
main external API structure.
Definition: avcodec.h:1520
const uint8_t * tex_data
Definition: hap.h:77
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1545
int chunk_count
Definition: hap.h:71
int coded_height
Definition: avcodec.h:1707
int slice_count
Definition: hap.h:83
static int decompress_texture2_thread(AVCodecContext *avctx, void *arg, int slice, int thread_nb)
Definition: hapdec.c:296
static int decompress_chunks_thread(AVCodecContext *avctx, void *arg, int chunk_nb, int thread_nb)
Definition: hapdec.c:220
static int hap_parse_frame_header(AVCodecContext *avctx)
Definition: hapdec.c:128
static int decompress_texture_thread(AVCodecContext *avctx, void *arg, int slice, int thread_nb)
Definition: hapdec.c:290
uint8_t * tex_buf
Definition: hap.h:78
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
Y , 8bpp.
Definition: pixfmt.h:74
common internal api header.
size_t tex_size
Definition: hap.h:79
Definition: hap.h:53
void * priv_data
Definition: avcodec.h:1547
int(* update_thread_context)(AVCodecContext *dst, const AVCodecContext *src)
Copy necessary context variables from a previous thread context to the current one.
Definition: avcodec.h:3477
#define AVERROR_DECODER_NOT_FOUND
Decoder not found.
Definition: error.h:52
int texture_section_size
Definition: hap.h:86
int(* rgtc1u_alpha_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:57
int(* execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
The codec may call this to execute several independent things.
Definition: avcodec.h:2831
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:296
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
Definition: bytestream.h:208
int uncompress_pix_size
Definition: hap.h:87
enum HapCompressor compressor
Definition: hap.h:54
#define MKTAG(a, b, c, d)
Definition: common.h:366
#define TEXTURE_BLOCK_W
Definition: texturedsp.h:42
int texture_count
Definition: hap.h:85
This structure stores compressed data.
Definition: avcodec.h:1409
int(* dxt5ys_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:53
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:961