filtering_audio.c File Reference

API example for audio decoding and filtering. More...

#include <unistd.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavfilter/buffersink.h>
#include <libavfilter/buffersrc.h>
#include <libavutil/channel_layout.h>
#include <libavutil/opt.h>

Go to the source code of this file.

Functions
static int	open_input_file (const char *filename)
static int	init_filters (const char *filters_descr)
static void	print_frame (const AVFrame *frame)
int	main (int argc, char **argv)

Variables
static const char *	filter_descr = "aresample=8000,aformat=sample_fmts=s16:channel_layouts=mono"
static const char *	player = "ffplay -f s16le -ar 8000 -ac 1 -"
static AVFormatContext *	fmt_ctx
static AVCodecContext *	dec_ctx
AVFilterContext *	buffersink_ctx
AVFilterContext *	buffersrc_ctx
AVFilterGraph *	filter_graph
static int	audio_stream_index = -1

Detailed Description

API example for audio decoding and filtering.

Definition in file filtering_audio.c.

Function Documentation

open_input_file()

static int open_input_file ( const char *  filename )

static

Examples

filtering_audio.c.

Definition at line 50 of file filtering_audio.c.

Referenced by main().

init_filters()

static int init_filters ( const char *  filters_descr )

static

Examples

filtering_audio.c.

Definition at line 88 of file filtering_audio.c.

Referenced by main().

print_frame()

static void print_frame ( const AVFrame *  frame )

static

Examples

filtering_audio.c.

Definition at line 201 of file filtering_audio.c.

Referenced by main().

main()

int main	(	int	argc,
		char **	argv
	)

Examples

filtering_audio.c.

Definition at line 215 of file filtering_audio.c.

Variable Documentation

filter_descr

const char* filter_descr = "aresample=8000,aformat=sample_fmts=s16:channel_layouts=mono"

static

Definition at line 40 of file filtering_audio.c.

Referenced by main().

player

const char* player = "ffplay -f s16le -ar 8000 -ac 1 -"

static

Examples

filtering_audio.c.

Definition at line 41 of file filtering_audio.c.

Referenced by main().

fmt_ctx

AVFormatContext* fmt_ctx

static

Examples

filtering_audio.c.

Definition at line 43 of file filtering_audio.c.

Referenced by init_filters(), main(), and open_input_file().

dec_ctx

AVCodecContext* dec_ctx

static

Examples

decode_audio.c, decode_video.c, demuxing_decoding.c, filtering_audio.c, and transcoding.c.

Definition at line 44 of file filtering_audio.c.

Referenced by decode(), init_filter(), init_filters(), main(), open_codec_context(), open_input_file(), and open_output_file().

buffersink_ctx

AVFilterContext* buffersink_ctx

Examples

filtering_audio.c, and transcoding.c.

Definition at line 45 of file filtering_audio.c.

Referenced by init_filter(), init_filters(), and main().

buffersrc_ctx

AVFilterContext* buffersrc_ctx

Examples

filtering_audio.c, and transcoding.c.

Definition at line 46 of file filtering_audio.c.

Referenced by init_filter(), init_filters(), and main().

filter_graph

AVFilterGraph* filter_graph

Examples

filter_audio.c, filtering_audio.c, and transcoding.c.

Definition at line 47 of file filtering_audio.c.

Referenced by init_filter(), init_filter_graph(), init_filters(), and main().

audio_stream_index

int audio_stream_index = -1

static

Examples

filtering_audio.c.

Definition at line 48 of file filtering_audio.c.

Referenced by init_filters(), main(), and open_input_file().