| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * RTP packetization for MPEG video | ||
| 3 | * Copyright (c) 2002 Fabrice Bellard | ||
| 4 | * Copyright (c) 2007 Luca Abeni | ||
| 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 "libavcodec/startcode.h" | ||
| 24 | #include "avformat.h" | ||
| 25 | #include "rtpenc.h" | ||
| 26 | |||
| 27 | /* NOTE: a single frame must be passed with sequence header if | ||
| 28 | needed. XXX: use slices. */ | ||
| 29 | ✗ | void ff_rtp_send_mpegvideo(AVFormatContext *s1, const uint8_t *buf1, int size) | |
| 30 | { | ||
| 31 | ✗ | RTPMuxContext *s = s1->priv_data; | |
| 32 | int len, h, max_packet_size; | ||
| 33 | uint8_t *q; | ||
| 34 | ✗ | const uint8_t *end = buf1 + size; | |
| 35 | int begin_of_slice, end_of_slice, frame_type, temporal_reference; | ||
| 36 | |||
| 37 | ✗ | max_packet_size = s->max_payload_size; | |
| 38 | ✗ | begin_of_slice = 1; | |
| 39 | ✗ | end_of_slice = 0; | |
| 40 | ✗ | frame_type = 0; | |
| 41 | ✗ | temporal_reference = 0; | |
| 42 | |||
| 43 | ✗ | while (size > 0) { | |
| 44 | int begin_of_sequence; | ||
| 45 | |||
| 46 | ✗ | begin_of_sequence = 0; | |
| 47 | ✗ | len = max_packet_size - 4; | |
| 48 | |||
| 49 | ✗ | if (len >= size) { | |
| 50 | ✗ | len = size; | |
| 51 | ✗ | end_of_slice = 1; | |
| 52 | } else { | ||
| 53 | const uint8_t *r, *r1; | ||
| 54 | int start_code; | ||
| 55 | |||
| 56 | ✗ | r1 = buf1; | |
| 57 | while (1) { | ||
| 58 | ✗ | start_code = -1; | |
| 59 | ✗ | r = avpriv_find_start_code(r1, end, &start_code); | |
| 60 | ✗ | if((start_code & 0xFFFFFF00) == 0x100) { | |
| 61 | /* New start code found */ | ||
| 62 | ✗ | if (start_code == 0x100) { | |
| 63 | ✗ | frame_type = (r[1] & 0x38) >> 3; | |
| 64 | ✗ | temporal_reference = (int)r[0] << 2 | r[1] >> 6; | |
| 65 | } | ||
| 66 | ✗ | if (start_code == 0x1B8) { | |
| 67 | ✗ | begin_of_sequence = 1; | |
| 68 | } | ||
| 69 | |||
| 70 | ✗ | if (r - buf1 - 4 <= len) { | |
| 71 | /* The current slice fits in the packet */ | ||
| 72 | ✗ | if (begin_of_slice == 0) { | |
| 73 | /* no slice at the beginning of the packet... */ | ||
| 74 | ✗ | end_of_slice = 1; | |
| 75 | ✗ | len = r - buf1 - 4; | |
| 76 | ✗ | break; | |
| 77 | } | ||
| 78 | ✗ | r1 = r; | |
| 79 | } else { | ||
| 80 | ✗ | if ((r1 - buf1 > 4) && (r - r1 < max_packet_size)) { | |
| 81 | ✗ | len = r1 - buf1 - 4; | |
| 82 | ✗ | end_of_slice = 1; | |
| 83 | } | ||
| 84 | ✗ | break; | |
| 85 | } | ||
| 86 | } else { | ||
| 87 | ✗ | break; | |
| 88 | } | ||
| 89 | } | ||
| 90 | } | ||
| 91 | |||
| 92 | ✗ | h = 0; | |
| 93 | ✗ | h |= temporal_reference << 16; | |
| 94 | ✗ | h |= begin_of_sequence << 13; | |
| 95 | ✗ | h |= begin_of_slice << 12; | |
| 96 | ✗ | h |= end_of_slice << 11; | |
| 97 | ✗ | h |= frame_type << 8; | |
| 98 | |||
| 99 | ✗ | q = s->buf; | |
| 100 | ✗ | *q++ = h >> 24; | |
| 101 | ✗ | *q++ = h >> 16; | |
| 102 | ✗ | *q++ = h >> 8; | |
| 103 | ✗ | *q++ = h; | |
| 104 | |||
| 105 | ✗ | memcpy(q, buf1, len); | |
| 106 | ✗ | q += len; | |
| 107 | |||
| 108 | /* 90kHz time stamp */ | ||
| 109 | ✗ | s->timestamp = s->cur_timestamp; | |
| 110 | ✗ | ff_rtp_send_data(s1, s->buf, q - s->buf, (len == size)); | |
| 111 | |||
| 112 | ✗ | buf1 += len; | |
| 113 | ✗ | size -= len; | |
| 114 | ✗ | begin_of_slice = end_of_slice; | |
| 115 | ✗ | end_of_slice = 0; | |
| 116 | } | ||
| 117 | ✗ | } | |
| 118 |