| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * RTP VP8 Packetizer | ||
| 3 | * Copyright (c) 2010 Josh Allmann | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include "rtpenc.h" | ||
| 23 | |||
| 24 | /* Based on a draft spec for VP8 RTP. | ||
| 25 | * ( http://tools.ietf.org/html/draft-ietf-payload-vp8-05 ) */ | ||
| 26 | ✗ | void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buf, int size) | |
| 27 | { | ||
| 28 | ✗ | RTPMuxContext *s = s1->priv_data; | |
| 29 | int len, max_packet_size, header_size; | ||
| 30 | |||
| 31 | ✗ | s->buf_ptr = s->buf; | |
| 32 | ✗ | s->timestamp = s->cur_timestamp; | |
| 33 | |||
| 34 | // extended control bit set, reference frame, start of partition, | ||
| 35 | // partition id 0 | ||
| 36 | ✗ | *s->buf_ptr++ = 0x90; | |
| 37 | ✗ | *s->buf_ptr++ = 0x80; // Picture id present | |
| 38 | ✗ | *s->buf_ptr++ = ((s->frame_count & 0x7f00) >> 8) | 0x80; | |
| 39 | ✗ | *s->buf_ptr++ = s->frame_count++ & 0xff; | |
| 40 | // Calculate the number of remaining bytes | ||
| 41 | ✗ | header_size = s->buf_ptr - s->buf; | |
| 42 | ✗ | max_packet_size = s->max_payload_size - header_size; | |
| 43 | |||
| 44 | ✗ | while (size > 0) { | |
| 45 | ✗ | len = FFMIN(size, max_packet_size); | |
| 46 | |||
| 47 | ✗ | memcpy(s->buf_ptr, buf, len); | |
| 48 | // marker bit is last packet in frame | ||
| 49 | ✗ | ff_rtp_send_data(s1, s->buf, len + header_size, size == len); | |
| 50 | |||
| 51 | ✗ | size -= len; | |
| 52 | ✗ | buf += len; | |
| 53 | // Clear the partition start bit, keep the rest of the header untouched | ||
| 54 | ✗ | s->buf[0] &= ~0x10; | |
| 55 | } | ||
| 56 | ✗ | } | |
| 57 |