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/*
* 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/audioconvert.h"
#include "libavutil/avstring.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;
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);
)
}
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