| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Sorenson-3 (SVQ3/SV3V) payload for RTP | ||
| 3 | * Copyright (c) 2010 Ronald S. Bultje | ||
| 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 | /** | ||
| 23 | * @file | ||
| 24 | * @brief RTP support for the SV3V (SVQ3) payload | ||
| 25 | * @author Ronald S. Bultje <rbultje@ronald.bitfreak.net> | ||
| 26 | * @see http://wiki.multimedia.cx/index.php?title=Sorenson_Video_3#Packetization | ||
| 27 | */ | ||
| 28 | |||
| 29 | #include <string.h> | ||
| 30 | #include "libavutil/intreadwrite.h" | ||
| 31 | #include "avio_internal.h" | ||
| 32 | #include "internal.h" | ||
| 33 | #include "rtp.h" | ||
| 34 | #include "rtpdec.h" | ||
| 35 | #include "rtpdec_formats.h" | ||
| 36 | |||
| 37 | struct PayloadContext { | ||
| 38 | AVIOContext *pktbuf; | ||
| 39 | int64_t timestamp; | ||
| 40 | }; | ||
| 41 | |||
| 42 | /** return 0 on packet, <0 on partial packet or error... */ | ||
| 43 | ✗ | static int svq3_parse_packet (AVFormatContext *s, PayloadContext *sv, | |
| 44 | AVStream *st, AVPacket *pkt, | ||
| 45 | uint32_t *timestamp, | ||
| 46 | const uint8_t *buf, int len, uint16_t seq, | ||
| 47 | int flags) | ||
| 48 | { | ||
| 49 | int config_packet, start_packet, end_packet; | ||
| 50 | |||
| 51 | ✗ | if (len < 2) | |
| 52 | ✗ | return AVERROR_INVALIDDATA; | |
| 53 | |||
| 54 | ✗ | config_packet = buf[0] & 0x40; | |
| 55 | ✗ | start_packet = buf[0] & 0x20; | |
| 56 | ✗ | end_packet = buf[0] & 0x10; | |
| 57 | ✗ | buf += 2; // ignore buf[1] | |
| 58 | ✗ | len -= 2; | |
| 59 | |||
| 60 | ✗ | if (config_packet) { | |
| 61 | ✗ | if (len < 2 || ff_alloc_extradata(st->codecpar, len + 8)) | |
| 62 | ✗ | return AVERROR_INVALIDDATA; | |
| 63 | |||
| 64 | ✗ | memcpy(st->codecpar->extradata, "SEQH", 4); | |
| 65 | ✗ | AV_WB32(st->codecpar->extradata + 4, len); | |
| 66 | ✗ | memcpy(st->codecpar->extradata + 8, buf, len); | |
| 67 | |||
| 68 | /* We set codec_id to AV_CODEC_ID_NONE initially to | ||
| 69 | * delay decoder initialization since extradata is | ||
| 70 | * carried within the RTP stream, not SDP. Here, | ||
| 71 | * by setting codec_id to AV_CODEC_ID_SVQ3, we are signalling | ||
| 72 | * to the decoder that it is OK to initialize. */ | ||
| 73 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_SVQ3; | |
| 74 | |||
| 75 | ✗ | return AVERROR(EAGAIN); | |
| 76 | } | ||
| 77 | |||
| 78 | ✗ | if (start_packet) { | |
| 79 | int res; | ||
| 80 | |||
| 81 | ✗ | ffio_free_dyn_buf(&sv->pktbuf); | |
| 82 | ✗ | if ((res = avio_open_dyn_buf(&sv->pktbuf)) < 0) | |
| 83 | ✗ | return res; | |
| 84 | ✗ | sv->timestamp = *timestamp; | |
| 85 | } | ||
| 86 | |||
| 87 | ✗ | if (!sv->pktbuf) | |
| 88 | ✗ | return AVERROR_INVALIDDATA; | |
| 89 | |||
| 90 | ✗ | avio_write(sv->pktbuf, buf, len); | |
| 91 | |||
| 92 | ✗ | if (end_packet) { | |
| 93 | ✗ | int ret = ff_rtp_finalize_packet(pkt, &sv->pktbuf, st->index); | |
| 94 | ✗ | if (ret < 0) | |
| 95 | ✗ | return ret; | |
| 96 | |||
| 97 | ✗ | *timestamp = sv->timestamp; | |
| 98 | ✗ | return 0; | |
| 99 | } | ||
| 100 | |||
| 101 | ✗ | return AVERROR(EAGAIN); | |
| 102 | } | ||
| 103 | |||
| 104 | ✗ | static void svq3_close_context(PayloadContext *sv) | |
| 105 | { | ||
| 106 | ✗ | ffio_free_dyn_buf(&sv->pktbuf); | |
| 107 | ✗ | } | |
| 108 | |||
| 109 | const RTPDynamicProtocolHandler ff_svq3_dynamic_handler = { | ||
| 110 | .enc_name = "X-SV3V-ES", | ||
| 111 | .codec_type = AVMEDIA_TYPE_VIDEO, | ||
| 112 | .codec_id = AV_CODEC_ID_NONE, // see if (config_packet) above | ||
| 113 | .priv_data_size = sizeof(PayloadContext), | ||
| 114 | .close = svq3_close_context, | ||
| 115 | .parse_packet = svq3_parse_packet, | ||
| 116 | }; | ||
| 117 |