/*
  * Copyright (c) 2008 Vitor Sessak

  * Copyright (c) 2010 S.N. Hemanth Meenakshisundaram
  * Copyright (c) 2011 Mina Nagy Zaki

  *
  * 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
  * memory buffer source filter
  */
 

 #include "avfilter.h"

 #include "internal.h"

 #include "audio.h"

 #include "avcodec.h"

 #include "buffersrc.h"

 #include "asrc_abuffer.h"
 #include "libavutil/avstring.h"

 #include "libavutil/channel_layout.h"

 #include "libavutil/fifo.h"

 #include "libavutil/imgutils.h"

 
 typedef struct {

     AVFifoBuffer     *fifo;

     AVRational        time_base;     ///< time_base to set in the output link
     int eof;
     unsigned          nb_failed_requests;
 
     /* Video only */
     AVFilterContext  *scale;

     int               h, w;

     enum AVPixelFormat  pix_fmt;

     AVRational        sample_aspect_ratio;

     char              sws_param[256];

 
     /* Audio only */
     // Audio format of incoming buffers
     int sample_rate;
     unsigned int sample_format;
     int64_t channel_layout;
 
     // Normalization filters
     AVFilterContext *aconvert;
     AVFilterContext *aresample;

 } BufferSourceContext;
 

 static void buf_free(AVFilterBuffer *ptr)
 {
     av_free(ptr);
     return;
 }
 

 int av_asrc_buffer_add_audio_buffer_ref(AVFilterContext *ctx,
                                         AVFilterBufferRef *samplesref,
                                         int av_unused flags)
 {

     return av_buffersrc_add_ref(ctx, samplesref, AV_BUFFERSRC_FLAG_NO_COPY);

 }
 
 int av_asrc_buffer_add_samples(AVFilterContext *ctx,
                                uint8_t *data[8], int linesize[8],
                                int nb_samples, int sample_rate,
                                int sample_fmt, int64_t channel_layout, int planar,
                                int64_t pts, int av_unused flags)
 {
     AVFilterBufferRef *samplesref;
 

     if (!channel_layout)
         return AVERROR(EINVAL);

     samplesref = avfilter_get_audio_buffer_ref_from_arrays(

                      data, linesize[0], AV_PERM_WRITE,

                      nb_samples,

                      sample_fmt, channel_layout);

     if (!samplesref)
         return AVERROR(ENOMEM);
 
     samplesref->buf->free  = buf_free;
     samplesref->pts = pts;
     samplesref->audio->sample_rate = sample_rate;
 

     AV_NOWARN_DEPRECATED(

     return av_asrc_buffer_add_audio_buffer_ref(ctx, samplesref, 0);

     )

 }
 
 int av_asrc_buffer_add_buffer(AVFilterContext *ctx,
                               uint8_t *buf, int buf_size, int sample_rate,
                               int sample_fmt, int64_t channel_layout, int planar,
                               int64_t pts, int av_unused flags)
 {
     uint8_t *data[8] = {0};
     int linesize[8];
     int nb_channels = av_get_channel_layout_nb_channels(channel_layout),
         nb_samples  = buf_size / nb_channels / av_get_bytes_per_sample(sample_fmt);
 
     av_samples_fill_arrays(data, linesize,
                            buf, nb_channels, nb_samples,
                            sample_fmt, 16);
 

     AV_NOWARN_DEPRECATED(

     return av_asrc_buffer_add_samples(ctx,
                                       data, linesize, nb_samples,
                                       sample_rate,
                                       sample_fmt, channel_layout, planar,
                                       pts, flags);

     )

 }