1 /* 2 * Copyright (c) 2004-2007 Marcus Overhagen <marcus@overhagen.de> 3 * 4 * Permission is hereby granted, free of charge, to any person 5 * obtaining a copy of this software and associated documentation 6 * files (the "Software"), to deal in the Software without restriction, 7 * including without limitation the rights to use, copy, modify, 8 * merge, publish, distribute, sublicense, and/or sell copies of 9 * the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 17 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 #include <stdio.h> 26 #include "pes.h" 27 28 29 status_t 30 pes_extract(const uint8 *pes_data, size_t pes_size, const uint8 **data, size_t *size) 31 { 32 if (pes_size <= 9) 33 return B_ERROR; 34 35 if (pes_data[0] || pes_data[1] || pes_data[2] != 1) 36 return B_ERROR; 37 38 size_t header_size = 9 + pes_data[8]; 39 40 if (pes_size <= header_size) 41 return B_ERROR; 42 43 // printf("header size %d\n", header_size); 44 45 pes_data += header_size; 46 pes_size -= header_size; 47 48 *data = pes_data; 49 *size = pes_size; 50 51 return B_OK; 52 } 53 54 55 status_t 56 pes_stream_id(const uint8 *pes_data, size_t pes_size, int *stream_id) 57 { 58 if (pes_size <= 9) 59 return B_ERROR; 60 61 if (pes_data[0] || pes_data[1] || pes_data[2] != 1) 62 return B_ERROR; 63 64 *stream_id = pes_data[3]; 65 66 return B_OK; 67 } 68 69