[FFmpeg-devel] [PATCH] lavc: add fixed point mp2 encoder

Paul B Mahol onemda at gmail.com
Fri Aug 3 05:07:39 CEST 2012


On 8/3/12, Michael Niedermayer <michaelni at gmx.at> wrote:
> On Mon, Jul 30, 2012 at 03:02:20PM +0000, Paul B Mahol wrote:
> [...]
>> diff --git a/libavcodec/mpegaudioenc_fixed.c
>> b/libavcodec/mpegaudioenc_fixed.c
>> new file mode 100644
>> index 0000000..fdcaa78
>> --- /dev/null
>> +++ b/libavcodec/mpegaudioenc_fixed.c
>> @@ -0,0 +1,39 @@
>> +/*
>> + * Fixed point MPEG Audio layer 2 encoder
>> + *
>> + * 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
>> + */
>> +
>> +#define USE_FLOATS 0
>> +#include "mpegaudioenc.c"
>
> the code uses #ifdef USE_FLOATS, thus this wont work
> also what speed and quality difference is there between the 2 ?

There is already integer and float version of decoder.


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