On 12/3/17, Carl Eugen Hoyos <ceffm...@gmail.com> wrote:
> 2017-12-01 17:26 GMT+01:00 Paul B Mahol <one...@gmail.com>:
>> Signed-off-by: Paul B Mahol <one...@gmail.com>
>> ---
>> libavformat/Makefile | 1 +
>> libavformat/allformats.c | 1 +
>> libavformat/nspdec.c | 101
>> +++++++++++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 103 insertions(+)
>> create mode 100644 libavformat/nspdec.c
>>
>> diff --git a/libavformat/Makefile b/libavformat/Makefile
>> index 4bffdf2205..734b703862 100644
>> --- a/libavformat/Makefile
>> +++ b/libavformat/Makefile
>> @@ -331,6 +331,7 @@ OBJS-$(CONFIG_MXF_MUXER) += mxfenc.o
>> mxf.o audiointerleave.o
>> OBJS-$(CONFIG_MXG_DEMUXER) += mxg.o
>> OBJS-$(CONFIG_NC_DEMUXER) += ncdec.o
>> OBJS-$(CONFIG_NISTSPHERE_DEMUXER) += nistspheredec.o pcm.o
>> +OBJS-$(CONFIG_NSP_DEMUXER) += nspdec.o
>> OBJS-$(CONFIG_NSV_DEMUXER) += nsvdec.o
>> OBJS-$(CONFIG_NULL_MUXER) += nullenc.o
>> OBJS-$(CONFIG_NUT_DEMUXER) += nutdec.o nut.o isom.o
>> diff --git a/libavformat/allformats.c b/libavformat/allformats.c
>> index 9213af9301..6a9b9883c9 100644
>> --- a/libavformat/allformats.c
>> +++ b/libavformat/allformats.c
>> @@ -224,6 +224,7 @@ static void register_all(void)
>> REGISTER_DEMUXER (MXG, mxg);
>> REGISTER_DEMUXER (NC, nc);
>> REGISTER_DEMUXER (NISTSPHERE, nistsphere);
>> + REGISTER_DEMUXER (NSP, nsp);
>> REGISTER_DEMUXER (NSV, nsv);
>> REGISTER_MUXER (NULL, null);
>> REGISTER_MUXDEMUX(NUT, nut);
>> diff --git a/libavformat/nspdec.c b/libavformat/nspdec.c
>> new file mode 100644
>> index 0000000000..d2ff779732
>> --- /dev/null
>> +++ b/libavformat/nspdec.c
>> @@ -0,0 +1,101 @@
>> +/*
>> + * NSP demuxer
>> + * Copyright (c) 2017 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/avstring.h"
>> +#include "libavutil/intreadwrite.h"
>> +#include "avformat.h"
>> +#include "internal.h"
>> +#include "pcm.h"
>> +
>> +static int nsp_probe(AVProbeData *p)
>> +{
>> + if (AV_RB32(p->buf) == AV_RB32("FORM") &&
>> + AV_RB32(p->buf + 4) == AV_RB32("DS16"))
>> + return AVPROBE_SCORE_MAX;
>> + return 0;
>> +}
>> +
>> +static int nsp_read_header(AVFormatContext *s)
>> +{
>> + int rate = 0, channels = 0;
>> + uint32_t chunk, size;
>> + AVStream *st;
>> + int64_t pos;
>> +
>> + avio_skip(s->pb, 12);
>> + st = avformat_new_stream(s, NULL);
>> + if (!st)
>> + return AVERROR(ENOMEM);
>> +
>> + while (!avio_feof(s->pb)) {
>> + chunk = avio_rb32(s->pb);
>
> Not codec_tag?
No.
>
>> + size = avio_rl32(s->pb);
>> + pos = avio_tell(s->pb);
>> +
>> + if (chunk == MKBETAG('H', 'D', 'R', '8') ||
>> + chunk == MKBETAG('H', 'E', 'D', 'R')) {
>
> It's your code but I suspect a switch() makes this
> more readable.
Changed.
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