FFmpeg/libavformat/g723_1.c
Michael Niedermayer 9023de342f Merge commit '1470ce21cec5ee26e106e2a884c26bbf84e5aaea'
* commit '1470ce21cec5ee26e106e2a884c26bbf84e5aaea':
  Bump libavcodec and libavformat minor versions for G.723.1 decoder and demuxer
  G.723.1 demuxer and decoder
  Add a shift parameter to celp_lp_synthesis_filter()
  libopenjpeg: K&R formatting cosmetics
  yadif: use emms_c() instead of inline assembly for emms invocations.
  ac3: don't use different names for option tables in the template file.
  lavfi: use const for AVFilterPad declarations in all filters.
  adpcm: don't duplicate identical AVSampleFmt array for each encoder.
  configure: cosmetics: Group test dependencies together
  configure: add more passthrough flags in tms470 filter
  configure: move flag filtering functions out of if/else blocks

Conflicts:
	Changelog
	configure
	doc/general.texi
	libavcodec/Makefile
	libavcodec/ac3enc_fixed.c
	libavcodec/allcodecs.c
	libavcodec/eac3enc.c
	libavcodec/g723_1.c
	libavcodec/g723_1_data.h
	libavcodec/libopenjpegdec.c
	libavcodec/libopenjpegenc.c
	libavcodec/v210dec.h
	libavcodec/version.h
	libavfilter/af_anull.c
	libavfilter/asrc_anullsrc.c
	libavfilter/f_settb.c
	libavfilter/fifo.c
	libavfilter/split.c
	libavfilter/src_movie.c
	libavfilter/vf_aspect.c
	libavfilter/vf_blackframe.c
	libavfilter/vf_boxblur.c
	libavfilter/vf_copy.c
	libavfilter/vf_crop.c
	libavfilter/vf_cropdetect.c
	libavfilter/vf_delogo.c
	libavfilter/vf_drawbox.c
	libavfilter/vf_drawtext.c
	libavfilter/vf_fade.c
	libavfilter/vf_fieldorder.c
	libavfilter/vf_format.c
	libavfilter/vf_frei0r.c
	libavfilter/vf_gradfun.c
	libavfilter/vf_hflip.c
	libavfilter/vf_hqdn3d.c
	libavfilter/vf_libopencv.c
	libavfilter/vf_lut.c
	libavfilter/vf_null.c
	libavfilter/vf_overlay.c
	libavfilter/vf_pad.c
	libavfilter/vf_pixdesctest.c
	libavfilter/vf_scale.c
	libavfilter/vf_select.c
	libavfilter/vf_setpts.c
	libavfilter/vf_showinfo.c
	libavfilter/vf_slicify.c
	libavfilter/vf_transpose.c
	libavfilter/vf_unsharp.c
	libavfilter/vf_vflip.c
	libavfilter/vf_yadif.c
	libavfilter/vsrc_color.c
	libavfilter/vsrc_testsrc.c
	libavformat/Makefile
	libavformat/allformats.c
	libavformat/g723_1.c
	libavformat/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-07-22 22:18:18 +02:00

86 lines
2.2 KiB
C

/*
* G.723.1 demuxer
* Copyright (c) 2010 Mohamed Naufal Basheer
*
* 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
*/
/**
* @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,rco,g723_1",
.flags = AVFMT_GENERIC_INDEX
};