repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Common code for the RTP depacketization of MPEG-1/2 formats. | |
| 3 | * Copyright (c) 2002 Fabrice Bellard | |
| 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 "libavutil/attributes.h" | |
| 23 | #include "libavutil/intreadwrite.h" | |
| 24 | #include "rtpdec_formats.h" | |
| 25 | ||
| 26 | static av_cold int mpeg_init(AVFormatContext *ctx, int st_index, PayloadContext *data) | |
| 27 | { | |
| 28 | if (st_index < 0) | |
| 29 | return 0; | |
| 30 | ctx->streams[st_index]->need_parsing = AVSTREAM_PARSE_FULL; | |
| 31 | return 0; | |
| 32 | } | |
| 33 | ||
| 34 | static int mpeg_parse_packet(AVFormatContext *ctx, PayloadContext *data, | |
| 35 | AVStream *st, AVPacket *pkt, uint32_t *timestamp, | |
| 36 | const uint8_t *buf, int len, uint16_t seq, | |
| 37 | int flags) | |
| 38 | { | |
| 39 | unsigned int h; | |
| 40 | if (len <= 4) | |
| 41 | return AVERROR_INVALIDDATA; | |
| 42 | h = AV_RB32(buf); | |
| 43 | buf += 4; | |
| 44 | len -= 4; | |
| 45 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && h & (1 << 26)) { | |
| 46 | /* MPEG-2 */ | |
| 47 | if (len <= 4) | |
| 48 | return AVERROR_INVALIDDATA; | |
| 49 | buf += 4; | |
| 50 | len -= 4; | |
| 51 | } | |
| 52 | if (av_new_packet(pkt, len) < 0) | |
| 53 | return AVERROR(ENOMEM); | |
| 54 | memcpy(pkt->data, buf, len); | |
| 55 | pkt->stream_index = st->index; | |
| 56 | return 0; | |
| 57 | } | |
| 58 | ||
| 59 | RTPDynamicProtocolHandler ff_mpeg_audio_dynamic_handler = { | |
| 60 | .codec_type = AVMEDIA_TYPE_AUDIO, | |
| 61 | .codec_id = AV_CODEC_ID_MP3, | |
| 62 | .init = mpeg_init, | |
| 63 | .parse_packet = mpeg_parse_packet, | |
| 64 | .static_payload_id = 14, | |
| 65 | }; | |
| 66 | ||
| 67 | RTPDynamicProtocolHandler ff_mpeg_video_dynamic_handler = { | |
| 68 | .codec_type = AVMEDIA_TYPE_VIDEO, | |
| 69 | .codec_id = AV_CODEC_ID_MPEG2VIDEO, | |
| 70 | .init = mpeg_init, | |
| 71 | .parse_packet = mpeg_parse_packet, | |
| 72 | .static_payload_id = 32, | |
| 73 | }; |