/*
  * 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 "audio.h"

 #include "avfilter.h"
 
 typedef struct {
     unsigned int frame;
 } ShowInfoContext;
 

 static av_cold int init(AVFilterContext *ctx, const char *args)

 {
     ShowInfoContext *showinfo = ctx->priv;
     showinfo->frame = 0;
     return 0;
 }
 

 static int 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 (!av_sample_fmt_is_planar(samplesref->format))

         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 "

            "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,
            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++;

     return ff_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 = ff_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}},
 };