FFmpeg  4.4.5
cbs_sei_syntax_template.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 static int FUNC(filler_payload)
22 {
23  int err, i;
24 
25  HEADER("Filler Payload");
26 
27 #ifdef READ
28  current->payload_size = state->payload_size;
29 #endif
30 
31  for (i = 0; i < current->payload_size; i++)
32  fixed(8, ff_byte, 0xff);
33 
34  return 0;
35 }
36 
40 {
41  int err, i, j;
42 
43  HEADER("User Data Registered ITU-T T.35");
44 
45  u(8, itu_t_t35_country_code, 0x00, 0xff);
46  if (current->itu_t_t35_country_code != 0xff)
47  i = 1;
48  else {
49  u(8, itu_t_t35_country_code_extension_byte, 0x00, 0xff);
50  i = 2;
51  }
52 
53 #ifdef READ
54  if (state->payload_size < i) {
55  av_log(ctx->log_ctx, AV_LOG_ERROR,
56  "Invalid SEI user data registered payload.\n");
57  return AVERROR_INVALIDDATA;
58  }
59  current->data_length = state->payload_size - i;
60 #endif
61 
62  allocate(current->data, current->data_length);
63  for (j = 0; j < current->data_length; j++)
64  xu(8, itu_t_t35_payload_byte[], current->data[j], 0x00, 0xff, 1, i + j);
65 
66  return 0;
67 }
68 
72 {
73  int err, i;
74 
75  HEADER("User Data Unregistered");
76 
77 #ifdef READ
78  if (state->payload_size < 16) {
79  av_log(ctx->log_ctx, AV_LOG_ERROR,
80  "Invalid SEI user data unregistered payload.\n");
81  return AVERROR_INVALIDDATA;
82  }
83  current->data_length = state->payload_size - 16;
84 #endif
85 
86  for (i = 0; i < 16; i++)
87  us(8, uuid_iso_iec_11578[i], 0x00, 0xff, 1, i);
88 
89  allocate(current->data, current->data_length);
90 
91  for (i = 0; i < current->data_length; i++)
92  xu(8, user_data_payload_byte[i], current->data[i], 0x00, 0xff, 1, i);
93 
94  return 0;
95 }
96 
100 {
101  int err, c;
102 
103  HEADER("Mastering Display Colour Volume");
104 
105  for (c = 0; c < 3; c++) {
106  ubs(16, display_primaries_x[c], 1, c);
107  ubs(16, display_primaries_y[c], 1, c);
108  }
109 
110  ub(16, white_point_x);
111  ub(16, white_point_y);
112 
113  ub(32, max_display_mastering_luminance);
114  ub(32, min_display_mastering_luminance);
115 
116  return 0;
117 }
118 
122 {
123  int err;
124 
125  HEADER("Content Light Level Information");
126 
127  ub(16, max_content_light_level);
128  ub(16, max_pic_average_light_level);
129 
130  return 0;
131 }
132 
137 {
138  int err;
139 
140  HEADER("Alternative Transfer Characteristics");
141 
142  ub(8, preferred_transfer_characteristics);
143 
144  return 0;
145 }
146 
148  SEIRawMessage *current)
149 {
151  int err, i;
152 
153  desc = ff_cbs_sei_find_type(ctx, current->payload_type);
154  if (desc) {
156  .payload_type = current->payload_type,
157  .payload_size = current->payload_size,
158  .extension_present = current->extension_bit_length > 0,
159  };
160  int start_position, current_position, bits_written;
161 
162 #ifdef READ
164 #endif
165 
166  start_position = bit_position(rw);
167 
168  CHECK(desc->READWRITE(ctx, rw, current->payload, &state));
169 
170  current_position = bit_position(rw);
171  bits_written = current_position - start_position;
172 
173  if (byte_alignment(rw) || state.extension_present ||
174  bits_written < 8 * current->payload_size) {
175  size_t bits_left;
176 
177 #ifdef READ
178  GetBitContext tmp = *rw;
179  int trailing_bits, trailing_zero_bits;
180 
181  bits_left = 8 * current->payload_size - bits_written;
182  if (bits_left > 8)
183  skip_bits_long(&tmp, bits_left - 8);
184  trailing_bits = get_bits(&tmp, FFMIN(bits_left, 8));
185  if (trailing_bits == 0) {
186  // The trailing bits must contain a bit_equal_to_one, so
187  // they can't all be zero.
188  return AVERROR_INVALIDDATA;
189  }
190  trailing_zero_bits = ff_ctz(trailing_bits);
191  current->extension_bit_length =
192  bits_left - 1 - trailing_zero_bits;
193 #endif
194 
195  if (current->extension_bit_length > 0) {
196  allocate(current->extension_data,
197  (current->extension_bit_length + 7) / 8);
198 
199  bits_left = current->extension_bit_length;
200  for (i = 0; bits_left > 0; i++) {
201  int length = FFMIN(bits_left, 8);
202  xu(length, reserved_payload_extension_data,
203  current->extension_data[i],
204  0, MAX_UINT_BITS(length), 0);
205  bits_left -= length;
206  }
207  }
208 
209  fixed(1, bit_equal_to_one, 1);
210  while (byte_alignment(rw))
211  fixed(1, bit_equal_to_zero, 0);
212  }
213 
214 #ifdef WRITE
215  current->payload_size = (put_bits_count(rw) - start_position) / 8;
216 #endif
217  } else {
218  uint8_t *data;
219 
220  allocate(current->payload, current->payload_size);
221  data = current->payload;
222 
223  for (i = 0; i < current->payload_size; i++)
224  xu(8, payload_byte[i], data[i], 0, 255, 1, i);
225  }
226 
227  return 0;
228 }
229 
231  SEIRawMessageList *current, int prefix)
232 {
234  int err, k;
235 
236 #ifdef READ
237  for (k = 0;; k++) {
238  uint32_t payload_type = 0;
239  uint32_t payload_size = 0;
240  uint32_t tmp;
241  GetBitContext payload_gbc;
242 
243  while (show_bits(rw, 8) == 0xff) {
244  fixed(8, ff_byte, 0xff);
245  payload_type += 255;
246  }
247  xu(8, last_payload_type_byte, tmp, 0, 254, 0);
248  payload_type += tmp;
249 
250  while (show_bits(rw, 8) == 0xff) {
251  fixed(8, ff_byte, 0xff);
252  payload_size += 255;
253  }
254  xu(8, last_payload_size_byte, tmp, 0, 254, 0);
255  payload_size += tmp;
256 
257  // There must be space remaining for both the payload and
258  // the trailing bits on the SEI NAL unit.
259  if (payload_size + 1 > get_bits_left(rw) / 8) {
260  av_log(ctx->log_ctx, AV_LOG_ERROR,
261  "Invalid SEI message: payload_size too large "
262  "(%"PRIu32" bytes).\n", payload_size);
263  return AVERROR_INVALIDDATA;
264  }
265  CHECK(init_get_bits(&payload_gbc, rw->buffer,
266  get_bits_count(rw) + 8 * payload_size));
267  skip_bits_long(&payload_gbc, get_bits_count(rw));
268 
269  CHECK(ff_cbs_sei_list_add(current));
270  message = &current->messages[k];
271 
272  message->payload_type = payload_type;
273  message->payload_size = payload_size;
274 
275  CHECK(FUNC(message)(ctx, &payload_gbc, message));
276 
277  skip_bits_long(rw, 8 * payload_size);
278 
280  break;
281  }
282 #else
283  for (k = 0; k < current->nb_messages; k++) {
284  PutBitContext start_state;
285  uint32_t tmp;
286  int trace, i;
287 
288  message = &current->messages[k];
289 
290  // We write the payload twice in order to find the size. Trace
291  // output is switched off for the first write.
292  trace = ctx->trace_enable;
293  ctx->trace_enable = 0;
294 
295  start_state = *rw;
296  for (i = 0; i < 2; i++) {
297  *rw = start_state;
298 
299  tmp = message->payload_type;
300  while (tmp >= 255) {
301  fixed(8, ff_byte, 0xff);
302  tmp -= 255;
303  }
304  xu(8, last_payload_type_byte, tmp, 0, 254, 0);
305 
306  tmp = message->payload_size;
307  while (tmp >= 255) {
308  fixed(8, ff_byte, 0xff);
309  tmp -= 255;
310  }
311  xu(8, last_payload_size_byte, tmp, 0, 254, 0);
312 
313  err = FUNC(message)(ctx, rw, message);
314  ctx->trace_enable = trace;
315  if (err < 0)
316  return err;
317  }
318  }
319 #endif
320 
321  return 0;
322 }
uint8_t
#define FUNC(a)
#define fixed(width, name, value)
Definition: cbs_av1.c:577
#define byte_alignment(rw)
Definition: cbs_av1.c:730
#define RWContext
Definition: cbs_av1.c:673
#define HEADER(name)
Definition: cbs_av1.c:544
static int FUNC() trailing_bits(CodedBitstreamContext *ctx, RWContext *rw, int nb_bits)
#define allocate(name, size)
Definition: cbs_h2645.c:432
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:264
#define us(width, name, range_min, range_max, subs,...)
Definition: cbs_h2645.c:278
#define ub(width, name)
Definition: cbs_h2645.c:266
#define ubs(width, name, subs,...)
Definition: cbs_h2645.c:280
#define bit_position(rw)
Definition: cbs_h2645.c:429
const SEIMessageTypeDescriptor * ff_cbs_sei_find_type(CodedBitstreamContext *ctx, int payload_type)
Find the type descriptor for the given payload type.
Definition: cbs_h2645.c:1640
static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
Definition: cbs_h2645.c:337
#define xu(width, name, var, range_min, range_max, subs,...)
Definition: cbs_h2645.c:392
#define MAX_UINT_BITS(length)
Definition: cbs_internal.h:169
int ff_cbs_sei_alloc_message_payload(SEIRawMessage *message, const SEIMessageTypeDescriptor *desc)
Allocate a new payload for the given SEI message.
Definition: cbs_sei.c:39
int ff_cbs_sei_list_add(SEIRawMessageList *list)
Allocate a new empty SEI message in a message list.
Definition: cbs_sei.c:74
static int FUNC() alternative_transfer_characteristics(CodedBitstreamContext *ctx, RWContext *rw, SEIRawAlternativeTransferCharacteristics *current, SEIMessageState *state)
static int FUNC() message(CodedBitstreamContext *ctx, RWContext *rw, SEIRawMessage *current)
static int FUNC() user_data_unregistered(CodedBitstreamContext *ctx, RWContext *rw, SEIRawUserDataUnregistered *current, SEIMessageState *state)
static int FUNC() filler_payload(CodedBitstreamContext *ctx, RWContext *rw, SEIRawFillerPayload *current, SEIMessageState *state)
static int FUNC() message_list(CodedBitstreamContext *ctx, RWContext *rw, SEIRawMessageList *current, int prefix)
static int FUNC() user_data_registered(CodedBitstreamContext *ctx, RWContext *rw, SEIRawUserDataRegistered *current, SEIMessageState *state)
static int FUNC() mastering_display_colour_volume(CodedBitstreamContext *ctx, RWContext *rw, SEIRawMasteringDisplayColourVolume *current, SEIMessageState *state)
static int FUNC() content_light_level_info(CodedBitstreamContext *ctx, RWContext *rw, SEIRawContentLightLevelInfo *current, SEIMessageState *state)
static struct @321 state
#define FFMIN(a, b)
Definition: common.h:105
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static void skip_bits_long(GetBitContext *s, int n)
Skips the specified number of bits.
Definition: get_bits.h:291
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:446
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
#define ff_ctz
Definition: intmath.h:106
int i
Definition: input.c:407
const char * desc
Definition: libsvtav1.c:79
const char data[16]
Definition: mxf.c:142
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:76
Context structure for coded bitstream operations.
Definition: cbs.h:170
const uint8_t * buffer
Definition: get_bits.h:62
#define av_log(a,...)
static uint8_t tmp[11]
Definition: aes_ctr.c:27
AVFormatContext * ctx
Definition: movenc.c:48
CHECK(-1) CHECK(-2) }} }} CHECK(1) CHECK(2) }} }} } if(diff0+diff1 > 0) temp -
static double c[64]