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/*
* Copyright (c) 2011 Stefano Sabatini
*
* 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
*/
/**
* @file
* filter for showing textual audio frame information
*/
#include "libavutil/adler32.h"
#include "libavutil/audioconvert.h"
#include "libavutil/timestamp.h"
#include "avfilter.h"
typedef struct {
unsigned int frame;
} ShowInfoContext;
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
ShowInfoContext *showinfo = ctx->priv;
showinfo->frame = 0;
return 0;
}
static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref)
{
AVFilterContext *ctx = inlink->dst;
ShowInfoContext *showinfo = ctx->priv;
uint32_t plane_checksum[8] = {0}, checksum = 0;
char chlayout_str[128];
int plane;
int linesize =
samplesref->audio->nb_samples *
av_get_bytes_per_sample(samplesref->format);
if (!samplesref->audio->planar) /* packed layout */
linesize *= av_get_channel_layout_nb_channels(samplesref->audio->channel_layout);
for (plane = 0; samplesref->data[plane] && plane < 8; plane++) {
uint8_t *data = samplesref->data[plane];
plane_checksum[plane] = av_adler32_update(plane_checksum[plane],
data, linesize);
checksum = av_adler32_update(checksum, data, linesize);
}
av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str), -1,
samplesref->audio->channel_layout);
av_log(ctx, AV_LOG_INFO,
"n:%d pts:%s pts_time:%s pos:%"PRId64" "
"fmt:%s chlayout:%s nb_samples:%d rate:%d planar:%d "
"checksum:%08X plane_checksum[%08X",
showinfo->frame,
av_ts2str(samplesref->pts), av_ts2timestr(samplesref->pts, &inlink->time_base),
samplesref->pos,
av_get_sample_fmt_name(samplesref->format),
chlayout_str,
samplesref->audio->nb_samples,
samplesref->audio->sample_rate,
samplesref->audio->planar,
checksum,
plane_checksum[0]);
for (plane = 1; samplesref->data[plane] && plane < 8; plane++)
av_log(ctx, AV_LOG_INFO, " %08X", plane_checksum[plane]);
av_log(ctx, AV_LOG_INFO, "]\n");
showinfo->frame++;
avfilter_filter_samples(inlink->dst->outputs[0], samplesref);
}
AVFilter avfilter_af_ashowinfo = {
.name = "ashowinfo",
.description = NULL_IF_CONFIG_SMALL("Show textual information for each audio frame."),
.priv_size = sizeof(ShowInfoContext),
.init = init,
.inputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.get_audio_buffer = avfilter_null_get_audio_buffer,
.filter_samples = filter_samples,
.min_perms = AV_PERM_READ, },
{ .name = NULL}},
.outputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_AUDIO },
{ .name = NULL}},
};
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