| 0,0 → 1,73 |
|---|
| /* |
| * Common code for the RTP depacketization of MPEG-1/2 formats. |
| * Copyright (c) 2002 Fabrice Bellard |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/intreadwrite.h" |
| #include "rtpdec_formats.h" |
| |
| static av_cold int mpeg_init(AVFormatContext *ctx, int st_index, PayloadContext *data) |
| { |
| if (st_index < 0) |
| return 0; |
| ctx->streams[st_index]->need_parsing = AVSTREAM_PARSE_FULL; |
| return 0; |
| } |
| |
| static int mpeg_parse_packet(AVFormatContext *ctx, PayloadContext *data, |
| AVStream *st, AVPacket *pkt, uint32_t *timestamp, |
| const uint8_t *buf, int len, uint16_t seq, |
| int flags) |
| { |
| unsigned int h; |
| if (len <= 4) |
| return AVERROR_INVALIDDATA; |
| h = AV_RB32(buf); |
| buf += 4; |
| len -= 4; |
| if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && h & (1 << 26)) { |
| /* MPEG-2 */ |
| if (len <= 4) |
| return AVERROR_INVALIDDATA; |
| buf += 4; |
| len -= 4; |
| } |
| if (av_new_packet(pkt, len) < 0) |
| return AVERROR(ENOMEM); |
| memcpy(pkt->data, buf, len); |
| pkt->stream_index = st->index; |
| return 0; |
| } |
| |
| RTPDynamicProtocolHandler ff_mpeg_audio_dynamic_handler = { |
| .codec_type = AVMEDIA_TYPE_AUDIO, |
| .codec_id = AV_CODEC_ID_MP3, |
| .init = mpeg_init, |
| .parse_packet = mpeg_parse_packet, |
| .static_payload_id = 14, |
| }; |
| |
| RTPDynamicProtocolHandler ff_mpeg_video_dynamic_handler = { |
| .codec_type = AVMEDIA_TYPE_VIDEO, |
| .codec_id = AV_CODEC_ID_MPEG2VIDEO, |
| .init = mpeg_init, |
| .parse_packet = mpeg_parse_packet, |
| .static_payload_id = 32, |
| }; |