diff options
author | Mohamed Naufal Basheer <naufal11@gmail.com> | 2011-03-18 01:56:50 +0300 |
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committer | Kostya Shishkov <kostya.shishkov@gmail.com> | 2012-07-22 09:58:54 +0400 |
commit | 55c3a4f617171ad1138df684cbafa570807bc6a9 (patch) | |
tree | 2d393e8da606e645b032bea2cc0057f7edbc38e1 /libavformat/g723_1.c | |
parent | 8aac5585fa7e50d899103efaa3aa4b2a774b16b4 (diff) |
G.723.1 demuxer and decoder
Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>
Diffstat (limited to 'libavformat/g723_1.c')
-rw-r--r-- | libavformat/g723_1.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/libavformat/g723_1.c b/libavformat/g723_1.c new file mode 100644 index 0000000000..415d01b480 --- /dev/null +++ b/libavformat/g723_1.c @@ -0,0 +1,85 @@ +/* + * G.723.1 demuxer + * Copyright (c) 2010 Mohamed Naufal Basheer + * + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * G.723.1 demuxer + */ + +#include "libavutil/audioconvert.h" +#include "avformat.h" +#include "internal.h" + +static const uint8_t frame_size[4] = { 24, 20, 4, 1 }; + +static int g723_1_init(AVFormatContext *s) +{ + AVStream *st; + + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + st->codec->codec_id = CODEC_ID_G723_1; + st->codec->channel_layout = AV_CH_LAYOUT_MONO; + st->codec->channels = 1; + st->codec->sample_rate = 8000; + + avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); + st->start_time = 0; + + return 0; +} + +static int g723_1_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + int size, byte, ret; + + pkt->pos = avio_tell(s->pb); + byte = avio_r8(s->pb); + size = frame_size[byte & 3]; + + ret = av_new_packet(pkt, size); + if (ret < 0) + return ret; + + pkt->data[0] = byte; + pkt->duration = 240; + pkt->stream_index = 0; + + ret = avio_read(s->pb, pkt->data + 1, size - 1); + if (ret < size - 1) { + av_free_packet(pkt); + return ret < 0 ? ret : AVERROR_EOF; + } + + return pkt->size; +} + +AVInputFormat ff_g723_1_demuxer = { + .name = "g723_1", + .long_name = NULL_IF_CONFIG_SMALL("G.723.1 format"), + .read_header = g723_1_init, + .read_packet = g723_1_read_packet, + .extensions = "tco", + .flags = AVFMT_GENERIC_INDEX +}; |