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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * RTP iLBC Depacketizer, RFC 3952 |
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| 3 | * Copyright (c) 2012 Martin Storsjo |
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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 "rtpdec_formats.h" |
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| 24 | #include "libavutil/avstring.h" |
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| 25 | |||
| 26 | static int ilbc_parse_fmtp(AVStream *stream, PayloadContext *data, |
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| 27 | char *attr, char *value) |
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| 28 | { |
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| 29 | if (!strcmp(attr, "mode")) { |
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| 30 | int mode = atoi(value); |
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| 31 | switch (mode) { |
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| 32 | case 20: |
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| 33 | stream->codec->block_align = 38; |
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| 34 | break; |
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| 35 | case 30: |
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| 36 | stream->codec->block_align = 50; |
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| 37 | break; |
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| 38 | default: |
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| 39 | av_log(NULL, AV_LOG_ERROR, "Unsupported iLBC mode %d\n", mode); |
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| 40 | return AVERROR(EINVAL); |
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| 41 | } |
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| 42 | } |
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| 43 | return 0; |
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| 44 | } |
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| 45 | |||
| 46 | static int ilbc_parse_sdp_line(AVFormatContext *s, int st_index, |
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| 47 | PayloadContext *data, const char *line) |
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| 48 | { |
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| 49 | const char *p; |
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| 50 | AVStream *st; |
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| 51 | |||
| 52 | if (st_index < 0) |
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| 53 | return 0; |
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| 54 | st = s->streams[st_index]; |
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| 55 | |||
| 56 | if (av_strstart(line, "fmtp:", &p)) { |
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| 57 | int ret = ff_parse_fmtp(st, data, p, ilbc_parse_fmtp); |
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| 58 | if (ret < 0) |
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| 59 | return ret; |
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| 60 | if (!st->codec->block_align) { |
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| 61 | av_log(s, AV_LOG_ERROR, "No iLBC mode set\n"); |
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| 62 | return AVERROR(EINVAL); |
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| 63 | } |
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| 64 | } |
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| 65 | return 0; |
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| 66 | } |
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| 67 | |||
| 68 | RTPDynamicProtocolHandler ff_ilbc_dynamic_handler = { |
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| 69 | .enc_name = "iLBC", |
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| 70 | .codec_type = AVMEDIA_TYPE_AUDIO, |
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| 71 | .codec_id = AV_CODEC_ID_ILBC, |
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| 72 | .parse_sdp_a_line = ilbc_parse_sdp_line, |
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| 73 | }; |