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