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59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/*
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* G.728 raw demuxer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "demux.h"
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#include "internal.h"
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static int g728_read_header(AVFormatContext *s)
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{
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = ffifmt(s->iformat)->raw_codec_id;
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st->codecpar->sample_rate = 8000;
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st->codecpar->bit_rate = 16000;
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st->codecpar->block_align = 5;
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st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
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avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
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return 0;
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}
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static int g728_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int ret = av_get_packet(s->pb, pkt, 1020); // a size similar to RAW_PACKET_SIZE divisible by 5
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pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
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pkt->duration = (pkt->size / 5) * 20;
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return ret;
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}
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const FFInputFormat ff_g728_demuxer = {
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.p.name = "g728",
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.p.long_name = NULL_IF_CONFIG_SMALL("raw G.728"),
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.p.extensions = "g728",
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.p.flags = AVFMT_GENERIC_INDEX,
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.read_header = g728_read_header,
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.read_packet = g728_read_packet,
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.raw_codec_id = AV_CODEC_ID_G728,
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};
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