Commit 20dd41af authored by Anton Khirnov's avatar Anton Khirnov
Browse files

lavfi: add ashowinfo filter

It can be useful for debugging.

Based on a patch by Stefano Sabatini <stefano.sabatini-lala@poste.it>
parent 9b500b8f
......@@ -4,6 +4,7 @@ releases are sorted from youngest to oldest.
version <next>:
- metadata (INFO tag) support in WAV muxer
- support for building DLLs using MSVC
- ashowinfo audio filter
version 9_beta1:
......
......@@ -175,6 +175,47 @@ stream ends. The default value is 2 seconds.
Pass the audio source unchanged to the output.
@section ashowinfo
Show a line containing various information for each input audio frame.
The input audio is not modified.
The shown line contains a sequence of key/value pairs of the form
@var{key}:@var{value}.
A description of each shown parameter follows:
@table @option
@item n
sequential number of the input frame, starting from 0
@item pts
Presentation timestamp of the input frame, in time base units; the time base
depends on the filter input pad, and is usually 1/@var{sample_rate}.
@item pts_time
presentation timestamp of the input frame in seconds
@item fmt
sample format
@item chlayout
channel layout
@item rate
sample rate for the audio frame
@item nb_samples
number of samples (per channel) in the frame
@item checksum
Adler-32 checksum (printed in hexadecimal) of the audio data. For planar audio
the data is treated as if all the planes were concatenated.
@item plane_checksums
A list of Adler-32 checksums for each data plane.
@end table
@section asplit
Split input audio into several identical outputs.
......
......@@ -28,6 +28,7 @@ OBJS-$(CONFIG_AFIFO_FILTER) += fifo.o
OBJS-$(CONFIG_AFORMAT_FILTER) += af_aformat.o
OBJS-$(CONFIG_AMIX_FILTER) += af_amix.o
OBJS-$(CONFIG_ANULL_FILTER) += af_anull.o
OBJS-$(CONFIG_ASHOWINFO_FILTER) += af_ashowinfo.o
OBJS-$(CONFIG_ASPLIT_FILTER) += split.o
OBJS-$(CONFIG_ASYNCTS_FILTER) += af_asyncts.o
OBJS-$(CONFIG_CHANNELMAP_FILTER) += af_channelmap.o
......
/*
* Copyright (c) 2011 Stefano Sabatini
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* filter for showing textual audio frame information
*/
#include <inttypes.h>
#include <stddef.h>
#include "libavutil/adler32.h"
#include "libavutil/audioconvert.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "libavutil/samplefmt.h"
#include "audio.h"
#include "avfilter.h"
typedef struct AShowInfoContext {
/**
* Scratch space for individual plane checksums for planar audio
*/
uint32_t *plane_checksums;
/**
* Frame counter
*/
uint64_t frame;
} AShowInfoContext;
static int config_input(AVFilterLink *inlink)
{
AShowInfoContext *s = inlink->dst->priv;
int channels = av_get_channel_layout_nb_channels(inlink->channel_layout);
s->plane_checksums = av_malloc(channels * sizeof(*s->plane_checksums));
if (!s->plane_checksums)
return AVERROR(ENOMEM);
return 0;
}
static void uninit(AVFilterContext *ctx)
{
AShowInfoContext *s = ctx->priv;
av_freep(&s->plane_checksums);
}
static int filter_samples(AVFilterLink *inlink, AVFilterBufferRef *buf)
{
AVFilterContext *ctx = inlink->dst;
AShowInfoContext *s = ctx->priv;
char chlayout_str[128];
uint32_t checksum = 0;
int channels = av_get_channel_layout_nb_channels(buf->audio->channel_layout);
int planar = av_sample_fmt_is_planar(buf->format);
int block_align = av_get_bytes_per_sample(buf->format) * (planar ? 1 : channels);
int data_size = buf->audio->nb_samples * block_align;
int planes = planar ? channels : 1;
int i;
for (i = 0; i < planes; i++) {
uint8_t *data = buf->extended_data[i];
s->plane_checksums[i] = av_adler32_update(0, data, data_size);
checksum = i ? av_adler32_update(checksum, data, data_size) :
s->plane_checksums[0];
}
av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str), -1,
buf->audio->channel_layout);
av_log(ctx, AV_LOG_INFO,
"n:%"PRIu64" pts:%"PRId64" pts_time:%f "
"fmt:%s chlayout:%s rate:%d nb_samples:%d "
"checksum:%08X ",
s->frame, buf->pts, buf->pts * av_q2d(inlink->time_base),
av_get_sample_fmt_name(buf->format), chlayout_str,
buf->audio->sample_rate, buf->audio->nb_samples,
checksum);
av_log(ctx, AV_LOG_INFO, "plane_checksums: [ ");
for (i = 0; i < planes; i++)
av_log(ctx, AV_LOG_INFO, "%08X ", s->plane_checksums[i]);
av_log(ctx, AV_LOG_INFO, "]\n");
s->frame++;
return ff_filter_samples(inlink->dst->outputs[0], buf);
}
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.get_audio_buffer = ff_null_get_audio_buffer,
.config_props = config_input,
.filter_samples = filter_samples,
.min_perms = AV_PERM_READ,
},
{ NULL },
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
},
{ NULL },
};
AVFilter avfilter_af_ashowinfo = {
.name = "ashowinfo",
.description = NULL_IF_CONFIG_SMALL("Show textual information for each audio frame."),
.priv_size = sizeof(AShowInfoContext),
.uninit = uninit,
.inputs = inputs,
.outputs = outputs,
};
......@@ -39,6 +39,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (AFORMAT, aformat, af);
REGISTER_FILTER (AMIX, amix, af);
REGISTER_FILTER (ANULL, anull, af);
REGISTER_FILTER (ASHOWINFO, ashowinfo, af);
REGISTER_FILTER (ASPLIT, asplit, af);
REGISTER_FILTER (ASYNCTS, asyncts, af);
REGISTER_FILTER (CHANNELMAP, channelmap, af);
......
......@@ -29,7 +29,7 @@
#include "libavutil/avutil.h"
#define LIBAVFILTER_VERSION_MAJOR 3
#define LIBAVFILTER_VERSION_MINOR 1
#define LIBAVFILTER_VERSION_MINOR 2
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment