repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * G.723.1 demuxer | |
| 3 | * Copyright (c) 2010 Mohamed Naufal Basheer | |
| 4 | * | |
| 5 | * This file is part of FFmpeg. | |
| 6 | * | |
| 7 | * FFmpeg is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; either | |
| 10 | * version 2.1 of the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * FFmpeg is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with FFmpeg; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | /** | |
| 23 | * @file | |
| 24 | * G.723.1 demuxer | |
| 25 | */ | |
| 26 | ||
| 27 | #include "libavutil/attributes.h" | |
| 28 | #include "libavutil/channel_layout.h" | |
| 29 | #include "avformat.h" | |
| 30 | #include "internal.h" | |
| 31 | ||
| 32 | static const uint8_t frame_size[4] = { 24, 20, 4, 1 }; | |
| 33 | ||
| 34 | static av_cold int g723_1_init(AVFormatContext *s) | |
| 35 | { | |
| 36 | AVStream *st; | |
| 37 | ||
| 38 | st = avformat_new_stream(s, NULL); | |
| 39 | if (!st) | |
| 40 | return AVERROR(ENOMEM); | |
| 41 | ||
| 42 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 43 | st->codec->codec_id = AV_CODEC_ID_G723_1; | |
| 44 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; | |
| 45 | st->codec->channels = 1; | |
| 46 | st->codec->sample_rate = 8000; | |
| 47 | ||
| 48 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); | |
| 49 | st->start_time = 0; | |
| 50 | ||
| 51 | return 0; | |
| 52 | } | |
| 53 | ||
| 54 | static int g723_1_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 55 | { | |
| 56 | int size, byte, ret; | |
| 57 | ||
| 58 | pkt->pos = avio_tell(s->pb); | |
| 59 | byte = avio_r8(s->pb); | |
| 60 | size = frame_size[byte & 3]; | |
| 61 | ||
| 62 | ret = av_new_packet(pkt, size); | |
| 63 | if (ret < 0) | |
| 64 | return ret; | |
| 65 | ||
| 66 | pkt->data[0] = byte; | |
| 67 | pkt->duration = 240; | |
| 68 | pkt->stream_index = 0; | |
| 69 | ||
| 70 | ret = avio_read(s->pb, pkt->data + 1, size - 1); | |
| 71 | if (ret < size - 1) { | |
| 72 | av_free_packet(pkt); | |
| 73 | return ret < 0 ? ret : AVERROR_EOF; | |
| 74 | } | |
| 75 | ||
| 76 | return pkt->size; | |
| 77 | } | |
| 78 | ||
| 79 | AVInputFormat ff_g723_1_demuxer = { | |
| 80 | .name = "g723_1", | |
| 81 | .long_name = NULL_IF_CONFIG_SMALL("G.723.1"), | |
| 82 | .read_header = g723_1_init, | |
| 83 | .read_packet = g723_1_read_packet, | |
| 84 | .extensions = "tco,rco,g723_1", | |
| 85 | .flags = AVFMT_GENERIC_INDEX | |
| 86 | }; |