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avformat/g728dec: raw G.728 demuxer

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This commit is contained in:
Peter Ross
2024-12-19 22:57:20 +11:00
parent a107340035
commit 52f62468aa
4 changed files with 61 additions and 0 deletions
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1
doc/general_contents.texi
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@ -638,6 +638,7 @@ library:
@item raw E-AC-3 @tab X @tab X
@item raw EVC @tab X @tab X
@item raw FLAC @tab X @tab X
@item raw G.728 @tab @tab X
@item raw GSM @tab @tab X
@item raw H.261 @tab X @tab X
@item raw H.263 @tab X @tab X

1
libavformat/Makefile
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@ -247,6 +247,7 @@ OBJS-$(CONFIG_G726_DEMUXER) += g726.o
OBJS-$(CONFIG_G726_MUXER) += rawenc.o
OBJS-$(CONFIG_G726LE_DEMUXER) += g726.o
OBJS-$(CONFIG_G726LE_MUXER) += rawenc.o
OBJS-$(CONFIG_G728_DEMUXER) += g728dec.o
OBJS-$(CONFIG_G729_DEMUXER) += g729dec.o
OBJS-$(CONFIG_GDV_DEMUXER) += gdv.o
OBJS-$(CONFIG_GENH_DEMUXER) += genh.o

1
libavformat/allformats.c
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@ -191,6 +191,7 @@ extern const FFInputFormat ff_g726_demuxer;
extern const FFOutputFormat ff_g726_muxer;
extern const FFInputFormat ff_g726le_demuxer;
extern const FFOutputFormat ff_g726le_muxer;
extern const FFInputFormat ff_g728_demuxer;
extern const FFInputFormat ff_g729_demuxer;
extern const FFInputFormat ff_gdv_demuxer;
extern const FFInputFormat ff_genh_demuxer;

58
libavformat/g728dec.c Normal file
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@ -0,0 +1,58 @@
/*
* G.728 raw demuxer
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "demux.h"
#include "internal.h"
static int g728_read_header(AVFormatContext *s)
{
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = ffifmt(s->iformat)->raw_codec_id;
st->codecpar->sample_rate = 8000;
st->codecpar->bit_rate = 16000;
st->codecpar->block_align = 5;
st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
return 0;
}
static int g728_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret = av_get_packet(s->pb, pkt, 1020); // a size similar to RAW_PACKET_SIZE divisible by 5
pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
pkt->duration = (pkt->size / 5) * 20;
return ret;
}
const FFInputFormat ff_g728_demuxer = {
.p.name = "g728",
.p.long_name = NULL_IF_CONFIG_SMALL("raw G.728"),
.p.extensions = "g728",
.p.flags = AVFMT_GENERIC_INDEX,
.read_header = g728_read_header,
.read_packet = g728_read_packet,
.raw_codec_id = AV_CODEC_ID_G728,
};