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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * G.723.1 demuxer |
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| 3 | * Copyright (c) 2010 Mohamed Naufal Basheer |
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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 | /** |
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| 23 | * @file |
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| 24 | * G.723.1 demuxer |
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| 25 | */ |
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| 26 | |||
| 27 | #include "libavutil/attributes.h" |
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| 28 | #include "libavutil/channel_layout.h" |
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| 29 | #include "avformat.h" |
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| 30 | #include "internal.h" |
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| 31 | |||
| 32 | static const uint8_t frame_size[4] = { 24, 20, 4, 1 }; |
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| 33 | |||
| 34 | static av_cold int g723_1_init(AVFormatContext *s) |
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| 35 | { |
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| 36 | AVStream *st; |
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| 37 | |||
| 38 | st = avformat_new_stream(s, NULL); |
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| 39 | if (!st) |
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| 40 | return AVERROR(ENOMEM); |
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| 41 | |||
| 42 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 43 | st->codec->codec_id = AV_CODEC_ID_G723_1; |
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| 44 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; |
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| 45 | st->codec->channels = 1; |
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| 46 | st->codec->sample_rate = 8000; |
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| 47 | |||
| 48 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
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| 49 | st->start_time = 0; |
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| 50 | |||
| 51 | return 0; |
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| 52 | } |
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| 53 | |||
| 54 | static int g723_1_read_packet(AVFormatContext *s, AVPacket *pkt) |
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| 55 | { |
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| 56 | int size, byte, ret; |
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| 57 | |||
| 58 | pkt->pos = avio_tell(s->pb); |
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| 59 | byte = avio_r8(s->pb); |
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| 60 | size = frame_size[byte & 3]; |
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| 61 | |||
| 62 | ret = av_new_packet(pkt, size); |
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| 63 | if (ret < 0) |
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| 64 | return ret; |
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| 65 | |||
| 66 | pkt->data[0] = byte; |
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| 67 | pkt->duration = 240; |
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| 68 | pkt->stream_index = 0; |
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| 69 | |||
| 70 | ret = avio_read(s->pb, pkt->data + 1, size - 1); |
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| 71 | if (ret < size - 1) { |
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| 72 | av_free_packet(pkt); |
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| 73 | return ret < 0 ? ret : AVERROR_EOF; |
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| 74 | } |
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| 75 | |||
| 76 | return pkt->size; |
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| 77 | } |
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| 78 | |||
| 79 | AVInputFormat ff_g723_1_demuxer = { |
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| 80 | .name = "g723_1", |
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| 81 | .long_name = NULL_IF_CONFIG_SMALL("G.723.1"), |
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| 82 | .read_header = g723_1_init, |
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| 83 | .read_packet = g723_1_read_packet, |
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| 84 | .extensions = "tco,rco,g723_1", |
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| 85 | .flags = AVFMT_GENERIC_INDEX |
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| 86 | }; |