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| 4349 | Serge | 1 | /* |
| 2 | * RTP Packetization of MPEG-4 Audio (RFC 3016) |
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| 3 | * Copyright (c) 2011 Juan Carlos Rodriguez |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | #include "avformat.h" |
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| 23 | #include "rtpenc.h" |
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| 24 | |||
| 25 | void ff_rtp_send_latm(AVFormatContext *s1, const uint8_t *buff, int size) |
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| 26 | { |
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| 27 | /* MP4A-LATM |
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| 28 | * The RTP payload format specification is described in RFC 3016 |
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| 29 | * The encoding specifications are provided in ISO/IEC 14496-3 */ |
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| 30 | |||
| 31 | RTPMuxContext *s = s1->priv_data; |
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| 32 | int header_size; |
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| 33 | int offset = 0; |
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| 34 | int len = 0; |
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| 35 | |||
| 36 | /* skip ADTS header, if present */ |
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| 37 | if ((s1->streams[0]->codec->extradata_size) == 0) { |
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| 38 | size -= 7; |
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| 39 | buff += 7; |
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| 40 | } |
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| 41 | |||
| 42 | /* PayloadLengthInfo() */ |
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| 43 | header_size = size/0xFF + 1; |
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| 44 | memset(s->buf, 0xFF, header_size - 1); |
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| 45 | s->buf[header_size - 1] = size % 0xFF; |
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| 46 | |||
| 47 | s->timestamp = s->cur_timestamp; |
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| 48 | |||
| 49 | /* PayloadMux() */ |
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| 50 | while (size > 0) { |
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| 51 | len = FFMIN(size, s->max_payload_size - (!offset ? header_size : 0)); |
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| 52 | size -= len; |
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| 53 | if (!offset) { |
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| 54 | memcpy(s->buf + header_size, buff, len); |
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| 55 | ff_rtp_send_data(s1, s->buf, header_size + len, !size); |
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| 56 | } else { |
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| 57 | ff_rtp_send_data(s1, buff + offset, len, !size); |
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| 58 | } |
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| 59 | offset += len; |
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| 60 | } |
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| 61 | } |