[FFmpeg-devel] [PATCH] AVR demuxer

[Peter Ross]

On Sun, Nov 04, 2012 at 04:04:31AM +0000, Paul B Mahol wrote:
> Signed-off-by: Paul B Mahol <onemda at gmail.com>
> ---
>  doc/general.texi         |  2 +
>  libavformat/Makefile     |  1 +
>  libavformat/allformats.c |  1 +
>  libavformat/avr.c        | 95 ++++++++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 99 insertions(+)
>  create mode 100644 libavformat/avr.c
> 
> diff --git a/doc/general.texi b/doc/general.texi
> index 8ec1d28..9768339 100644
> --- a/doc/general.texi
> +++ b/doc/general.texi
> @@ -150,6 +150,8 @@ library:
>  @item ASF                       @tab X @tab X
>  @item AVI                       @tab X @tab X
>  @item AVISynth                  @tab   @tab X
> + at item AVR                       @tab   @tab X
> +    @tab Audio format used on Mac.
>  @item AVS                       @tab   @tab X
>      @tab Multimedia format used by the Creature Shock game.
>  @item Beam Software SIFF        @tab   @tab X
> diff --git a/libavformat/Makefile b/libavformat/Makefile
> index ff16b3b..5176c4f 100644
> --- a/libavformat/Makefile
> +++ b/libavformat/Makefile
> @@ -56,6 +56,7 @@ OBJS-$(CONFIG_AVI_DEMUXER)               += avidec.o
>  OBJS-$(CONFIG_AVI_MUXER)                 += avienc.o
>  OBJS-$(CONFIG_AVISYNTH)                  += avisynth.o
>  OBJS-$(CONFIG_AVM2_MUXER)                += swfenc.o swf.o
> +OBJS-$(CONFIG_AVR_DEMUXER)               += avr.o
>  OBJS-$(CONFIG_AVS_DEMUXER)               += avs.o vocdec.o voc.o
>  OBJS-$(CONFIG_BETHSOFTVID_DEMUXER)       += bethsoftvid.o
>  OBJS-$(CONFIG_BFI_DEMUXER)               += bfi.o
> diff --git a/libavformat/allformats.c b/libavformat/allformats.c
> index 3551394..ea345e5 100644
> --- a/libavformat/allformats.c
> +++ b/libavformat/allformats.c
> @@ -69,6 +69,7 @@ void av_register_all(void)
>      REGISTER_MUXDEMUX (AVI, avi);
>      REGISTER_DEMUXER  (AVISYNTH, avisynth);
>      REGISTER_MUXER    (AVM2, avm2);
> +    REGISTER_DEMUXER  (AVR, avr);
>      REGISTER_DEMUXER  (AVS, avs);
>      REGISTER_DEMUXER  (BETHSOFTVID, bethsoftvid);
>      REGISTER_DEMUXER  (BFI, bfi);
> diff --git a/libavformat/avr.c b/libavformat/avr.c
> new file mode 100644
> index 0000000..1e212fc
> --- /dev/null
> +++ b/libavformat/avr.c
> @@ -0,0 +1,95 @@
> +/*
> + * AVR 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/intreadwrite.h"
> +#include "avformat.h"
> +#include "internal.h"
> +#include "rawdec.h"
> +
> +static int avr_probe(AVProbeData *p)
> +{
> +    if (AV_RL32(p->buf) == MKTAG('2', 'B', 'I', 'T'))
> +        return AVPROBE_SCORE_MAX / 2;
> +    return 0;
> +}

accuracy could be improved by test other fields for sanity
e.g bits_per_coded_sample, and sample_rate

-- Peter
(A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
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