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libavfilter
af_ashowinfo.c
Go to the documentation of this file.
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/*
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* Copyright (c) 2011 Stefano Sabatini
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <inttypes.h>
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#include <stddef.h>
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#include "
libavutil/adler32.h
"
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#include "
libavutil/attributes.h
"
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#include "
libavutil/channel_layout.h
"
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#include "
libavutil/common.h
"
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#include "
libavutil/mem.h
"
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#include "
libavutil/samplefmt.h
"
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#include "
audio.h
"
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#include "
avfilter.h
"
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#include "
internal.h
"
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typedef
struct
AShowInfoContext
{
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uint32_t *
plane_checksums
;
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uint64_t
frame
;
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}
AShowInfoContext
;
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static
int
config_input
(
AVFilterLink
*inlink)
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{
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AShowInfoContext
*s = inlink->
dst
->
priv
;
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int
channels =
av_get_channel_layout_nb_channels
(inlink->
channel_layout
);
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s->
plane_checksums
=
av_malloc
(channels *
sizeof
(*s->
plane_checksums
));
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if
(!s->
plane_checksums
)
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return
AVERROR
(ENOMEM);
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return
0;
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}
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static
av_cold
void
uninit
(
AVFilterContext
*ctx)
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{
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AShowInfoContext
*s = ctx->
priv
;
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av_freep
(&s->
plane_checksums
);
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}
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static
int
filter_frame
(
AVFilterLink
*inlink,
AVFrame
*buf)
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{
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AVFilterContext
*ctx = inlink->
dst
;
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AShowInfoContext
*s = ctx->
priv
;
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char
chlayout_str[128];
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uint32_t checksum = 0;
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int
channels =
av_get_channel_layout_nb_channels
(buf->
channel_layout
);
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int
planar =
av_sample_fmt_is_planar
(buf->
format
);
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int
block_align =
av_get_bytes_per_sample
(buf->
format
) * (planar ? 1 : channels);
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int
data_size = buf->
nb_samples
* block_align;
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int
planes = planar ? channels : 1;
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int
i;
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for
(i = 0; i < planes; i++) {
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uint8_t
*
data
= buf->
extended_data
[i];
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s->
plane_checksums
[i] =
av_adler32_update
(0, data, data_size);
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checksum = i ?
av_adler32_update
(checksum, data, data_size) :
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s->
plane_checksums
[0];
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}
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av_get_channel_layout_string
(chlayout_str,
sizeof
(chlayout_str), -1,
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buf->
channel_layout
);
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av_log
(ctx,
AV_LOG_INFO
,
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"n:%"
PRIu64
" pts:%"
PRId64
" pts_time:%f "
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"fmt:%s chlayout:%s rate:%d nb_samples:%d "
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"checksum:%08X "
,
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s->
frame
, buf->
pts
, buf->
pts
*
av_q2d
(inlink->
time_base
),
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av_get_sample_fmt_name
(buf->
format
), chlayout_str,
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buf->
sample_rate
, buf->
nb_samples
,
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checksum);
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av_log
(ctx,
AV_LOG_INFO
,
"plane_checksums: [ "
);
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for
(i = 0; i < planes; i++)
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av_log
(ctx,
AV_LOG_INFO
,
"%08X "
, s->
plane_checksums
[i]);
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av_log
(ctx,
AV_LOG_INFO
,
"]\n"
);
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s->
frame
++;
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return
ff_filter_frame
(inlink->
dst
->
outputs
[0], buf);
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}
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static
const
AVFilterPad
inputs
[] = {
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{
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.
name
=
"default"
,
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.type =
AVMEDIA_TYPE_AUDIO
,
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.get_audio_buffer =
ff_null_get_audio_buffer
,
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.config_props =
config_input
,
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.filter_frame =
filter_frame
,
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},
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{
NULL
},
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};
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static
const
AVFilterPad
outputs
[] = {
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{
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.
name
=
"default"
,
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.type =
AVMEDIA_TYPE_AUDIO
,
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},
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{
NULL
},
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};
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AVFilter
ff_af_ashowinfo
= {
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.
name
=
"ashowinfo"
,
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.description =
NULL_IF_CONFIG_SMALL
(
"Show textual information for each audio frame."
),
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.priv_size =
sizeof
(
AShowInfoContext
),
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.
uninit
=
uninit
,
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.inputs = inputs,
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.outputs = outputs,
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};
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