FFmpeg/libavformat/g723_1.c
Michael Niedermayer b5da7d4c1a Merge remote-tracking branch 'qatar/master'
* qatar/master:
  avformat: Drop pointless "format" from container long names
  swscale: bury one more piece of inline asm under HAVE_INLINE_ASM.
  wv: K&R formatting cosmetics
  configure: Add missing descriptions to help output
  h264_ps: declare array of colorspace strings on its own line.
  fate: amix: specify f32 sample format for comparison
  tiny_psnr: support 32-bit float samples
  eamad/eatgq/eatqi: call special EA IDCT directly
  eamad: remove use of MpegEncContext
  mpegvideo: remove unnecessary inclusions of faandct.h
  af_asyncts: avoid overflow in out_size with large delta values
  af_asyncts: add first_pts option

Conflicts:
	configure
	libavcodec/eamad.c
	libavcodec/h264_ps.c
	libavformat/crcenc.c
	libavformat/ffmdec.c
	libavformat/ffmenc.c
	libavformat/framecrcenc.c
	libavformat/md5enc.c
	libavformat/nutdec.c
	libavformat/rawenc.c
	libavformat/yuv4mpeg.c
	tests/tiny_psnr.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-07-30 23:28:31 +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"),
.read_header = g723_1_init,
.read_packet = g723_1_read_packet,
.extensions = "tco,rco,g723_1",
.flags = AVFMT_GENERIC_INDEX
};