FFmpeg/libavformat/afc.c
Andreas Rheinhardt c1e439d7e9 avformat: Forward errors where possible
It is not uncommon to find code where the caller thinks to know better
what the return value should be than the callee. E.g. something like
"if (av_new_packet(pkt, size) < 0) return AVERROR(ENOMEM);". This commit
changes several instances of this to instead forward the actual error.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2019-12-12 19:25:33 +01:00

81 lines
2.4 KiB
C

/*
* AFC demuxer
* Copyright (c) 2012 Paul B Mahol
*
* 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 "libavutil/channel_layout.h"
#include "avformat.h"
#include "internal.h"
typedef struct AFCDemuxContext {
int64_t data_end;
} AFCDemuxContext;
static int afc_read_header(AVFormatContext *s)
{
AFCDemuxContext *c = s->priv_data;
AVStream *st;
int ret;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_AFC;
st->codecpar->channels = 2;
st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
if ((ret = ff_alloc_extradata(st->codecpar, 1)) < 0)
return ret;
st->codecpar->extradata[0] = 8 * st->codecpar->channels;
c->data_end = avio_rb32(s->pb) + 32LL;
st->duration = avio_rb32(s->pb);
st->codecpar->sample_rate = avio_rb16(s->pb);
avio_skip(s->pb, 22);
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
return 0;
}
static int afc_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AFCDemuxContext *c = s->priv_data;
int64_t size;
int ret;
size = FFMIN(c->data_end - avio_tell(s->pb), 18 * 128);
if (size <= 0)
return AVERROR_EOF;
ret = av_get_packet(s->pb, pkt, size);
pkt->stream_index = 0;
return ret;
}
AVInputFormat ff_afc_demuxer = {
.name = "afc",
.long_name = NULL_IF_CONFIG_SMALL("AFC"),
.priv_data_size = sizeof(AFCDemuxContext),
.read_header = afc_read_header,
.read_packet = afc_read_packet,
.extensions = "afc",
.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK,
};