On Wed, Nov 4, 2015 at 1:10 PM, James Almer <jamr...@gmail.com> wrote:
> On 11/4/2015 3:19 PM, Kyle Swanson wrote:
>> Signed-off-by: Kyle Swanson <k...@ylo.ph>
>> diff --git a/libavfilter/asrc_anoisesrc.c b/libavfilter/asrc_anoisesrc.c
>> new file mode 100644
>> index 0000000..d008d67
>> --- /dev/null
>> +++ b/libavfilter/asrc_anoisesrc.c
>> @@ -0,0 +1,222 @@
>> +/*
>> + * Copyright (c) 2015 Kyle Swanson <k...@ylo.ph>.
>> + *
>> + * 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 <float.h>
>> +
>> +#include "libavutil/opt.h"
>> +#include "audio.h"
>> +#include "avfilter.h"
>> +#include "internal.h"
>> +#include "libavutil/lfg.h"
>> +
>> +typedef struct {
>> + const AVClass *class;
>> + int sample_rate;
>> + double amplitude;
>> + int64_t dur;
>> + char *color;
>> + int seed;
>
> uint32_t.
>
> Also, why not use av_get_random_seed() when no seed is specified?
> In that case both this and the AVOptions below should be int64_t, and the
> range of values -1 to UINT32_MAX, with -1 as default.
>
> See f_perms.c
Good idea. I'll add this.
>> +
>> + int infinite;
>> + double (*filter)(double white, double *buf);
>> + double* buf;
>> + int buf_size;
>> + AVLFG c;
>> +} ANoiseSrcContext;
>> +
>> +#define OFFSET(x) offsetof(ANoiseSrcContext, x)
>> +#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
>> +
>> +static const AVOption anoisesrc_options[] = {
>> + { "sample_rate", "set sample rate", OFFSET(sample_rate),
>> AV_OPT_TYPE_INT, {.i64 = 48000}, 15, INT_MAX, FLAGS },
>> + { "r", "set sample rate", OFFSET(sample_rate),
>> AV_OPT_TYPE_INT, {.i64 = 48000}, 15, INT_MAX, FLAGS },
>> + { "amplitude", "set amplitude", OFFSET(amplitude),
>> AV_OPT_TYPE_DOUBLE, {.dbl = 1.}, 0., 1., FLAGS },
>> + { "a", "set amplitude", OFFSET(amplitude),
>> AV_OPT_TYPE_DOUBLE, {.dbl = 1.}, 0., 1., FLAGS },
>> + { "duration", "set duration", OFFSET(dur),
>> AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, FLAGS },
>> + { "d", "set duration", OFFSET(dur),
>> AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, FLAGS },
>> + { "color", "set noise color", OFFSET(color),
>> AV_OPT_TYPE_STRING, {.str = "white"}, CHAR_MIN, CHAR_MAX, FLAGS },
>> + { "colour", "set noise color", OFFSET(color),
>> AV_OPT_TYPE_STRING, {.str = "white"}, CHAR_MIN, CHAR_MAX, FLAGS },
>> + { "c", "set noise color", OFFSET(color),
>> AV_OPT_TYPE_STRING, {.str = "white"}, CHAR_MIN, CHAR_MAX, FLAGS },
>> + { "seed", "set random seed", OFFSET(seed),
>> AV_OPT_TYPE_INT, {.i64 = 0}, 0, UINT_MAX, FLAGS },
>> + { "s", "set random seed", OFFSET(seed),
>> AV_OPT_TYPE_INT, {.i64 = 0}, 0, UINT_MAX, FLAGS },
>> + {NULL}
>> +};
>
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
