[4] | 1 | /****************************************************************************** |
---|
| 2 | * SAGE - Scalable Adaptive Graphics Environment |
---|
| 3 | * |
---|
| 4 | * Copyright (C) 2004 Electronic Visualization Laboratory, |
---|
| 5 | * University of Illinois at Chicago |
---|
| 6 | * |
---|
| 7 | * All rights reserved. |
---|
| 8 | * |
---|
| 9 | * Redistribution and use in source and binary forms, with or without |
---|
| 10 | * modification, are permitted provided that the following conditions are met: |
---|
| 11 | * |
---|
| 12 | * * Redistributions of source code must retain the above copyright |
---|
| 13 | * notice, this list of conditions and the following disclaimer. |
---|
| 14 | * * Redistributions in binary form must reproduce the above |
---|
| 15 | * copyright notice, this list of conditions and the following disclaimer |
---|
| 16 | * in the documentation and/or other materials provided with the distribution. |
---|
| 17 | * * Neither the name of the University of Illinois at Chicago nor |
---|
| 18 | * the names of its contributors may be used to endorse or promote |
---|
| 19 | * products derived from this software without specific prior written permission. |
---|
| 20 | * |
---|
| 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
---|
| 22 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
---|
| 23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
---|
| 24 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
---|
| 25 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
---|
| 26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
---|
| 27 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
---|
| 28 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
---|
| 29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
---|
| 30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
---|
| 31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
---|
| 32 | * |
---|
| 33 | * Direct questions, comments etc about SAGE to http://www.evl.uic.edu/cavern/forum/ |
---|
| 34 | * |
---|
| 35 | *****************************************************************************/ |
---|
| 36 | |
---|
| 37 | #include "SVC_decode_mpeg2.h" |
---|
| 38 | |
---|
| 39 | #define NEEDBYTES(x) \ |
---|
| 40 | do { \ |
---|
| 41 | int missing; \ |
---|
| 42 | \ |
---|
| 43 | missing = (x) - bytes; \ |
---|
| 44 | if (missing > 0) { \ |
---|
| 45 | if (header == head_buf) { \ |
---|
| 46 | if (missing <= end - buf) { \ |
---|
| 47 | memcpy (header + bytes, buf, missing); \ |
---|
| 48 | buf += missing; \ |
---|
| 49 | bytes = (x); \ |
---|
| 50 | } else { \ |
---|
| 51 | memcpy (header + bytes, buf, end - buf); \ |
---|
| 52 | state_bytes = bytes + end - buf; \ |
---|
| 53 | return 0; \ |
---|
| 54 | } \ |
---|
| 55 | } else { \ |
---|
| 56 | memcpy (head_buf, header, bytes); \ |
---|
| 57 | state = DEMUX_HEADER; \ |
---|
| 58 | state_bytes = bytes; \ |
---|
| 59 | return 0; \ |
---|
| 60 | } \ |
---|
| 61 | } \ |
---|
| 62 | } while (0) |
---|
| 63 | |
---|
| 64 | #define DONEBYTES(x) \ |
---|
| 65 | do { \ |
---|
| 66 | if (header != head_buf) \ |
---|
| 67 | buf = header + (x); \ |
---|
| 68 | } while (0) |
---|
| 69 | |
---|
| 70 | |
---|
| 71 | SVC_decode_mpeg2::SVC_decode_mpeg2() |
---|
| 72 | { |
---|
| 73 | total_offset = 0; |
---|
| 74 | buffer = NULL; |
---|
| 75 | buf = NULL; |
---|
| 76 | nextbuf = NULL; |
---|
| 77 | data = NULL; |
---|
| 78 | end = NULL; |
---|
| 79 | m_output_callback = NULL; |
---|
| 80 | m_output_obj = NULL; //input module |
---|
| 81 | m_output_module = NULL; //output module |
---|
| 82 | } |
---|
| 83 | void SVC_decode_mpeg2::init(int program_id, int color_mode,int buf_size,char* output_addr, int output_port) |
---|
| 84 | { |
---|
| 85 | m_byte_pixel = convert_format2pixelbyte(color_mode); |
---|
| 86 | demux_pid = -1; |
---|
| 87 | m_color_mode = color_mode; |
---|
| 88 | m_output_addr = output_addr; |
---|
| 89 | m_output_port = output_port; |
---|
| 90 | buffer_size = buf_size; |
---|
| 91 | mpeg2_initialization(); |
---|
| 92 | } |
---|
| 93 | void SVC_decode_mpeg2::decode (unsigned char* input_data, int input_size) |
---|
| 94 | { |
---|
| 95 | int pid; |
---|
| 96 | //end = buf + fread (buf, 1, buffer + buffer_size - buf, in_file); |
---|
| 97 | memcpy(buf,input_data,input_size); |
---|
| 98 | //fprintf(stderr,"input_size in decode is %d\n ",input_size); |
---|
| 99 | end = buf + input_size; |
---|
| 100 | |
---|
| 101 | buf = buffer; |
---|
| 102 | |
---|
| 103 | for (; (nextbuf = buf + 188) <= end; buf = nextbuf) { |
---|
| 104 | if (*buf != 0x47) { |
---|
| 105 | fprintf (stderr, "bad sync byte\n"); |
---|
| 106 | nextbuf = buf + 1; |
---|
| 107 | continue; |
---|
| 108 | } |
---|
| 109 | pid = ((buf[1] << 8) + buf[2]) & 0x1fff; |
---|
| 110 | if (pid != demux_pid && demux_pid != -1) |
---|
| 111 | { |
---|
| 112 | continue; |
---|
| 113 | } |
---|
| 114 | data = buf + 4; |
---|
| 115 | if (buf[3] & 0x20) { /* buf contains an adaptation field */ |
---|
| 116 | data = buf + 5 + buf[4]; |
---|
| 117 | if (data > nextbuf) |
---|
| 118 | continue; |
---|
| 119 | } |
---|
| 120 | |
---|
| 121 | //Begin_automatically detecting video pid |
---|
| 122 | if((buf[1] & 0x40 && demux_pid == -1) ){ //payload unit start indicator |
---|
| 123 | if(((data[0] << 16) + (data[1] << 8) + data[2]) == 0x000001){ //pes start code |
---|
| 124 | if((data[3] >> 4) == 0xe){ //pes -> stream_id |
---|
| 125 | demux_pid = pid; |
---|
| 126 | } |
---|
| 127 | else |
---|
| 128 | continue; |
---|
| 129 | } |
---|
| 130 | else |
---|
| 131 | continue; |
---|
| 132 | } |
---|
| 133 | //End_automatically detecting video pid |
---|
| 134 | |
---|
| 135 | |
---|
| 136 | if (buf[3] & 0x10) |
---|
| 137 | { |
---|
| 138 | demux (data, nextbuf, |
---|
| 139 | (buf[1] & 0x40) ? DEMUX_PAYLOAD_START : 0); |
---|
| 140 | } |
---|
| 141 | } |
---|
| 142 | |
---|
| 143 | if (end != buffer + input_size) |
---|
| 144 | { |
---|
| 145 | fprintf(stderr,"strange size in decode()\n"); |
---|
| 146 | return; |
---|
| 147 | } |
---|
| 148 | memcpy (buffer, buf, end - buf); |
---|
| 149 | buf = buffer + (end - buf); |
---|
| 150 | } |
---|
| 151 | void SVC_decode_mpeg2::mpeg2_initialization() |
---|
| 152 | { |
---|
| 153 | mpeg2dec = mpeg2_init (); |
---|
| 154 | if(mpeg2dec == NULL) |
---|
| 155 | { |
---|
| 156 | fprintf (stderr, "Can not get mpeg2dec\n"); |
---|
| 157 | exit(1); |
---|
| 158 | } |
---|
| 159 | mpeg2_malloc_hooks (malloc_hook, NULL); |
---|
| 160 | |
---|
| 161 | buffer = (uint8_t *) malloc (buffer_size); |
---|
| 162 | if (buffer == NULL || buffer_size < 188) |
---|
| 163 | exit (1); |
---|
| 164 | buf = buffer; |
---|
| 165 | } |
---|
| 166 | void* SVC_decode_mpeg2::malloc_hook (unsigned size, mpeg2_alloc_t reason) |
---|
| 167 | { |
---|
| 168 | void* buf; |
---|
| 169 | if ((int)reason < 0) { |
---|
| 170 | return NULL; |
---|
| 171 | } |
---|
| 172 | buf = mpeg2_malloc (size, (mpeg2_alloc_t)-1); |
---|
| 173 | if (buf && (reason == MPEG2_ALLOC_YUV || reason == MPEG2_ALLOC_CONVERTED)) |
---|
| 174 | memset (buf, 0, size); |
---|
| 175 | return buf; |
---|
| 176 | } |
---|
| 177 | |
---|
| 178 | void SVC_decode_mpeg2::stop() |
---|
| 179 | { |
---|
| 180 | mpeg2_close (mpeg2dec); |
---|
| 181 | } |
---|
| 182 | |
---|
| 183 | int SVC_decode_mpeg2::output_setup (unsigned int width, |
---|
| 184 | unsigned int height, unsigned int chroma_width, |
---|
| 185 | unsigned int chroma_height) |
---|
| 186 | { |
---|
| 187 | m_width = width; |
---|
| 188 | m_height = height; |
---|
| 189 | m_chroma_width = chroma_width; |
---|
| 190 | m_chroma_height = chroma_height; |
---|
| 191 | |
---|
| 192 | /* setting m_convert_result according to color mode */ |
---|
| 193 | switch(m_color_mode) |
---|
| 194 | { |
---|
| 195 | case RGB16: |
---|
| 196 | m_convert_result.convert = mpeg2convert_rgb16; |
---|
| 197 | break; |
---|
| 198 | |
---|
| 199 | case RGB24: |
---|
| 200 | m_convert_result.convert = mpeg2convert_rgb24; |
---|
| 201 | break; |
---|
| 202 | |
---|
| 203 | case RGB32: |
---|
| 204 | m_convert_result.convert = mpeg2convert_rgb32; |
---|
| 205 | break; |
---|
| 206 | |
---|
| 207 | case YUV: |
---|
| 208 | m_convert_result.convert = mpeg2convert_uyvy; |
---|
| 209 | break; |
---|
| 210 | default: |
---|
| 211 | fprintf(stderr,"not supported color mode\n"); |
---|
| 212 | return 1; |
---|
| 213 | break; |
---|
| 214 | } |
---|
| 215 | return 0; |
---|
| 216 | } |
---|
| 217 | |
---|
| 218 | void SVC_decode_mpeg2::set_output_module(SVC_output_module * o_module) |
---|
| 219 | { |
---|
| 220 | m_output_module = o_module; |
---|
| 221 | } |
---|
| 222 | void SVC_decode_mpeg2::decode_mpeg2 (uint8_t * current, uint8_t * end) |
---|
| 223 | { |
---|
| 224 | const mpeg2_info_t * info; |
---|
| 225 | mpeg2_state_t state; |
---|
| 226 | |
---|
| 227 | mpeg2_buffer (mpeg2dec, current, end); |
---|
| 228 | total_offset += end - current; |
---|
| 229 | |
---|
| 230 | info = mpeg2_info (mpeg2dec); |
---|
| 231 | while (1) { |
---|
| 232 | state = mpeg2_parse (mpeg2dec); |
---|
| 233 | switch (state) { |
---|
| 234 | case STATE_BUFFER: |
---|
| 235 | return; |
---|
| 236 | case STATE_SEQUENCE: |
---|
| 237 | /* might set nb fbuf, convert format, stride */ |
---|
| 238 | /* might set fbufs */ |
---|
| 239 | if (output_setup (info->sequence->width, |
---|
| 240 | info->sequence->height, |
---|
| 241 | info->sequence->chroma_width, |
---|
| 242 | info->sequence->chroma_height)) { |
---|
| 243 | fprintf (stderr, "display setup failed\n"); |
---|
| 244 | exit (1); |
---|
| 245 | } |
---|
| 246 | |
---|
| 247 | if (m_convert_result.convert && |
---|
| 248 | mpeg2_convert (mpeg2dec, m_convert_result.convert, NULL)) { |
---|
| 249 | fprintf (stderr, "color conversion setup failed\n"); |
---|
| 250 | exit (1); |
---|
| 251 | } |
---|
| 252 | |
---|
| 253 | if(m_output_module != NULL) |
---|
| 254 | m_output_module -> init(m_width, m_height, m_color_mode,m_output_addr,m_output_port); |
---|
| 255 | |
---|
| 256 | for (int i = 0; i < 3; i++) { |
---|
| 257 | fbuf[i][0] = (unsigned char *) malloc (sizeof(unsigned char)*m_width*m_height*m_byte_pixel); |
---|
| 258 | fbuf[i][1] = fbuf[i][2] = NULL; |
---|
| 259 | if (!fbuf[i][0]) { |
---|
| 260 | fprintf (stderr, "Could not allocate an output buffer.\n"); |
---|
| 261 | exit (1); |
---|
| 262 | } |
---|
| 263 | |
---|
| 264 | mpeg2_set_buf (mpeg2dec, fbuf[i], NULL); |
---|
| 265 | } |
---|
| 266 | |
---|
| 267 | mpeg2_skip (mpeg2dec, 0); //maybe not skip |
---|
| 268 | break; |
---|
| 269 | |
---|
| 270 | case STATE_PICTURE: |
---|
| 271 | /* might skip */ |
---|
| 272 | /* might set fbuf */ |
---|
| 273 | break; |
---|
| 274 | case STATE_SLICE: |
---|
| 275 | case STATE_END: |
---|
| 276 | case STATE_INVALID_END: |
---|
| 277 | |
---|
| 278 | /* draw current picture */ |
---|
| 279 | /* might free frame buffer */ |
---|
| 280 | if (info->display_fbuf) { |
---|
| 281 | if (m_output_callback && m_output_obj) |
---|
| 282 | m_output_callback (m_output_obj, info->display_fbuf->buf, |
---|
| 283 | info->display_fbuf->id, m_width, m_height); |
---|
| 284 | } |
---|
| 285 | |
---|
| 286 | /* |
---|
| 287 | //for discard, it is not used |
---|
| 288 | if (output->discard && info->discard_fbuf) |
---|
| 289 | output->discard (m_output_obj, info->discard_fbuf->buf, |
---|
| 290 | info->discard_fbuf->id); |
---|
| 291 | */ |
---|
| 292 | break; |
---|
| 293 | default: |
---|
| 294 | break; |
---|
| 295 | } |
---|
| 296 | } |
---|
| 297 | |
---|
| 298 | |
---|
| 299 | } |
---|
| 300 | void SVC_decode_mpeg2::set_output_callback(void* output_obj, DECODEOUTPUT_CALLBACK callback) |
---|
| 301 | { |
---|
| 302 | m_output_obj = output_obj; |
---|
| 303 | m_output_callback = callback; |
---|
| 304 | } |
---|
| 305 | |
---|
| 306 | int SVC_decode_mpeg2::demux (uint8_t * buf, uint8_t * end, int flags) |
---|
| 307 | { |
---|
| 308 | static int mpeg1_skip_table[16] = { |
---|
| 309 | 0, 0, 4, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
---|
| 310 | }; |
---|
| 311 | uint8_t * header; |
---|
| 312 | int bytes; |
---|
| 313 | int len; |
---|
| 314 | |
---|
| 315 | if (flags & DEMUX_PAYLOAD_START) |
---|
| 316 | goto payload_start; |
---|
| 317 | switch (state) { |
---|
| 318 | case DEMUX_HEADER: |
---|
| 319 | if (state_bytes > 0) { |
---|
| 320 | header = head_buf; |
---|
| 321 | bytes = state_bytes; |
---|
| 322 | goto continue_header; |
---|
| 323 | } |
---|
| 324 | break; |
---|
| 325 | case DEMUX_DATA: |
---|
| 326 | if (demux_pid || (state_bytes > end - buf)) { |
---|
| 327 | decode_mpeg2 (buf, end); |
---|
| 328 | state_bytes -= end - buf; |
---|
| 329 | return 0; |
---|
| 330 | } |
---|
| 331 | decode_mpeg2 (buf, buf + state_bytes); |
---|
| 332 | buf += state_bytes; |
---|
| 333 | break; |
---|
| 334 | case DEMUX_SKIP: |
---|
| 335 | if (demux_pid || (state_bytes > end - buf)) { |
---|
| 336 | state_bytes -= end - buf; |
---|
| 337 | return 0; |
---|
| 338 | } |
---|
| 339 | buf += state_bytes; |
---|
| 340 | break; |
---|
| 341 | } |
---|
| 342 | |
---|
| 343 | while (1) { |
---|
| 344 | if (demux_pid) { |
---|
| 345 | state = DEMUX_SKIP; |
---|
| 346 | return 0; |
---|
| 347 | } |
---|
| 348 | payload_start: |
---|
| 349 | header = buf; |
---|
| 350 | bytes = end - buf; |
---|
| 351 | continue_header: |
---|
| 352 | NEEDBYTES (4); |
---|
| 353 | if (header[0] || header[1] || (header[2] != 1)) { |
---|
| 354 | if (demux_pid) { |
---|
| 355 | state = DEMUX_SKIP; |
---|
| 356 | return 0; |
---|
| 357 | } else if (header != head_buf) { |
---|
| 358 | buf++; |
---|
| 359 | goto payload_start; |
---|
| 360 | } else { |
---|
| 361 | header[0] = header[1]; |
---|
| 362 | header[1] = header[2]; |
---|
| 363 | header[2] = header[3]; |
---|
| 364 | bytes = 3; |
---|
| 365 | goto continue_header; |
---|
| 366 | } |
---|
| 367 | } |
---|
| 368 | if (demux_pid) { |
---|
| 369 | if ((header[3] >= 0xe0) && (header[3] <= 0xef)) |
---|
| 370 | goto pes; |
---|
| 371 | fprintf (stderr, "bad stream id %x\n", header[3]); |
---|
| 372 | exit (1); |
---|
| 373 | } |
---|
| 374 | switch (header[3]) { |
---|
| 375 | case 0xb9: /* program end code */ |
---|
| 376 | /* DONEBYTES (4); */ |
---|
| 377 | /* break; */ |
---|
| 378 | return 1; |
---|
| 379 | case 0xba: /* pack header */ |
---|
| 380 | NEEDBYTES (5); |
---|
| 381 | if ((header[4] & 0xc0) == 0x40) { /* mpeg2 */ |
---|
| 382 | NEEDBYTES (14); |
---|
| 383 | len = 14 + (header[13] & 7); |
---|
| 384 | NEEDBYTES (len); |
---|
| 385 | DONEBYTES (len); |
---|
| 386 | /* header points to the mpeg2 pack header */ |
---|
| 387 | } else if ((header[4] & 0xf0) == 0x20) { /* mpeg1 */ |
---|
| 388 | NEEDBYTES (12); |
---|
| 389 | DONEBYTES (12); |
---|
| 390 | /* header points to the mpeg1 pack header */ |
---|
| 391 | } else { |
---|
| 392 | fprintf (stderr, "weird pack header\n"); |
---|
| 393 | DONEBYTES (5); |
---|
| 394 | } |
---|
| 395 | break; |
---|
| 396 | default: |
---|
| 397 | if (header[3] == demux_track) { |
---|
| 398 | pes: |
---|
| 399 | NEEDBYTES (7); |
---|
| 400 | if ((header[6] & 0xc0) == 0x80) { /* mpeg2 */ |
---|
| 401 | NEEDBYTES (9); |
---|
| 402 | len = 9 + header[8]; |
---|
| 403 | NEEDBYTES (len); |
---|
| 404 | /* header points to the mpeg2 pes header */ |
---|
| 405 | if (header[7] & 0x80) { |
---|
| 406 | uint32_t pts, dts; |
---|
| 407 | |
---|
| 408 | pts = (((header[9] >> 1) << 30) | |
---|
| 409 | (header[10] << 22) | ((header[11] >> 1) << 15) | |
---|
| 410 | (header[12] << 7) | (header[13] >> 1)); |
---|
| 411 | dts = (!(header[7] & 0x40) ? pts : |
---|
| 412 | (((header[14] >> 1) << 30) | |
---|
| 413 | (header[15] << 22) | |
---|
| 414 | ((header[16] >> 1) << 15) | |
---|
| 415 | (header[17] << 7) | (header[18] >> 1))); |
---|
| 416 | mpeg2_tag_picture (mpeg2dec, pts, dts); |
---|
| 417 | } |
---|
| 418 | } else { /* mpeg1 */ |
---|
| 419 | int len_skip; |
---|
| 420 | uint8_t * ptsbuf; |
---|
| 421 | |
---|
| 422 | len = 7; |
---|
| 423 | while (header[len - 1] == 0xff) { |
---|
| 424 | len++; |
---|
| 425 | NEEDBYTES (len); |
---|
| 426 | if (len > 23) { |
---|
| 427 | fprintf (stderr, "too much stuffing\n"); |
---|
| 428 | break; |
---|
| 429 | } |
---|
| 430 | } |
---|
| 431 | if ((header[len - 1] & 0xc0) == 0x40) { |
---|
| 432 | len += 2; |
---|
| 433 | NEEDBYTES (len); |
---|
| 434 | } |
---|
| 435 | len_skip = len; |
---|
| 436 | len += mpeg1_skip_table[header[len - 1] >> 4]; |
---|
| 437 | NEEDBYTES (len); |
---|
| 438 | /* header points to the mpeg1 pes header */ |
---|
| 439 | ptsbuf = header + len_skip; |
---|
| 440 | if ((ptsbuf[-1] & 0xe0) == 0x20) { |
---|
| 441 | uint32_t pts, dts; |
---|
| 442 | |
---|
| 443 | pts = (((ptsbuf[-1] >> 1) << 30) | |
---|
| 444 | (ptsbuf[0] << 22) | ((ptsbuf[1] >> 1) << 15) | |
---|
| 445 | (ptsbuf[2] << 7) | (ptsbuf[3] >> 1)); |
---|
| 446 | dts = (((ptsbuf[-1] & 0xf0) != 0x30) ? pts : |
---|
| 447 | (((ptsbuf[4] >> 1) << 30) | |
---|
| 448 | (ptsbuf[5] << 22) | ((ptsbuf[6] >> 1) << 15) | |
---|
| 449 | (ptsbuf[7] << 7) | (ptsbuf[18] >> 1))); |
---|
| 450 | mpeg2_tag_picture (mpeg2dec, pts, dts); |
---|
| 451 | } |
---|
| 452 | } |
---|
| 453 | DONEBYTES (len); |
---|
| 454 | bytes = 6 + (header[4] << 8) + header[5] - len; |
---|
| 455 | if (demux_pid || (bytes > end - buf)) { |
---|
| 456 | decode_mpeg2 (buf, end); |
---|
| 457 | state = DEMUX_DATA; |
---|
| 458 | state_bytes = bytes - (end - buf); |
---|
| 459 | return 0; |
---|
| 460 | } else if (bytes > 0) { |
---|
| 461 | decode_mpeg2 (buf, buf + bytes); |
---|
| 462 | buf += bytes; |
---|
| 463 | } |
---|
| 464 | } else if (header[3] < 0xb9) { |
---|
| 465 | fprintf (stderr, |
---|
| 466 | "looks like a video stream, not system stream\n"); |
---|
| 467 | DONEBYTES (4); |
---|
| 468 | } else { |
---|
| 469 | NEEDBYTES (6); |
---|
| 470 | DONEBYTES (6); |
---|
| 471 | bytes = (header[4] << 8) + header[5]; |
---|
| 472 | if (bytes > end - buf) { |
---|
| 473 | state = DEMUX_SKIP; |
---|
| 474 | state_bytes = bytes - (end - buf); |
---|
| 475 | return 0; |
---|
| 476 | } |
---|
| 477 | buf += bytes; |
---|
| 478 | } |
---|
| 479 | } |
---|
| 480 | } |
---|
| 481 | } |
---|
| 482 | |
---|