buffersink.c File Reference

buffer sink More...

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "framequeue.h"
#include "audio.h"
#include "avfilter.h"
#include "buffersink.h"
#include "filters.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	BufferSinkContext

Macros
#define	FF_INTERNAL_FIELDS   1
#define	NB_ITEMS(list)   (list ## _size / sizeof(*list))
#define	FIFO_INIT_SIZE   8
#define	FIFO_INIT_ELEMENT_SIZE   sizeof(void *)
#define	MAKE_AVFILTERLINK_ACCESSOR(type, field)
#define	CHECK_LIST_SIZE(field)
#define	OFFSET(x)   offsetof(BufferSinkContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Functions
int attribute_align_arg	av_buffersink_get_frame (AVFilterContext *ctx, AVFrame *frame)
	Get a frame with filtered data from sink and put it in frame. More...
static int	return_or_keep_frame (BufferSinkContext *buf, AVFrame *out, AVFrame *in, int flags)
static int	get_frame_internal (AVFilterContext *ctx, AVFrame *frame, int flags, int samples)
int attribute_align_arg	av_buffersink_get_frame_flags (AVFilterContext *ctx, AVFrame *frame, int flags)
	Get a frame with filtered data from sink and put it in frame. More...
int attribute_align_arg	av_buffersink_get_samples (AVFilterContext *ctx, AVFrame *frame, int nb_samples)
	Same as av_buffersink_get_frame(), but with the ability to specify the number of samples read. More...
AVBufferSinkParams *	av_buffersink_params_alloc (void)
	Create an AVBufferSinkParams structure. More...
AVABufferSinkParams *	av_abuffersink_params_alloc (void)
	Create an AVABufferSinkParams structure. More...
static av_cold int	common_init (AVFilterContext *ctx)
static int	activate (AVFilterContext *ctx)
void	av_buffersink_set_frame_size (AVFilterContext *ctx, unsigned frame_size)
	Set the frame size for an audio buffer sink. More...
static av_cold int	vsink_init (AVFilterContext *ctx, void *opaque)
static int	vsink_query_formats (AVFilterContext *ctx)
static av_cold int	asink_init (AVFilterContext *ctx, void *opaque)
static int	asink_query_formats (AVFilterContext *ctx)
	AVFILTER_DEFINE_CLASS (buffersink)
	AVFILTER_DEFINE_CLASS (abuffersink)

Variables
static const AVOption	buffersink_options []
static const AVOption	abuffersink_options []
static const AVFilterPad	avfilter_vsink_buffer_inputs []
AVFilter	ff_vsink_buffer
static const AVFilterPad	avfilter_asink_abuffer_inputs []
AVFilter	ff_asink_abuffer

Detailed Description

buffer sink

Definition in file buffersink.c.

Macro Definition Documentation

FF_INTERNAL_FIELDS

#define FF_INTERNAL_FIELDS   1

Definition at line 32 of file buffersink.c.

NB_ITEMS

#define NB_ITEMS

(

list

)

(list ## _size / sizeof(*list))

Definition at line 63 of file buffersink.c.

Referenced by asink_query_formats(), and vsink_query_formats().

FIFO_INIT_SIZE

#define FIFO_INIT_SIZE   8

Definition at line 64 of file buffersink.c.

FIFO_INIT_ELEMENT_SIZE

#define FIFO_INIT_ELEMENT_SIZE   sizeof(void *)

Definition at line 65 of file buffersink.c.

MAKE_AVFILTERLINK_ACCESSOR

#define MAKE_AVFILTERLINK_ACCESSOR	(		type,
			field
	)

Value:

type av_buffersink_get_##field(const AVFilterContext *ctx) { \
    av_assert0(ctx->filter->activate == activate); \
    return ctx->inputs[0]->field; \
}

Definition at line 183 of file buffersink.c.

CHECK_LIST_SIZE

#define CHECK_LIST_SIZE

(

field

)

Value:

if (buf->field ## _size % sizeof(*buf->field)) { \
            av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \
                   "should be multiple of %d\n", \
                   buf->field ## _size, (int)sizeof(*buf->field)); \
            return AVERROR(EINVAL); \
        }

Definition at line 218 of file buffersink.c.

Referenced by asink_query_formats(), and vsink_query_formats().

OFFSET

#define OFFSET

(

x

)

offsetof(BufferSinkContext, x)

Definition at line 316 of file buffersink.c.

FLAGS [1/2]

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 323 of file buffersink.c.

FLAGS [2/2]

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 323 of file buffersink.c.

Function Documentation

return_or_keep_frame()

static int return_or_keep_frame ( BufferSinkContext *  buf, AVFrame *  out, AVFrame *  in, int  flags  )

static

Definition at line 72 of file buffersink.c.

Referenced by get_frame_internal().

get_frame_internal()

static int get_frame_internal ( AVFilterContext *  ctx, AVFrame *  frame, int  flags, int  samples  )

static

Definition at line 86 of file buffersink.c.

Referenced by av_buffersink_get_frame_flags(), and av_buffersink_get_samples().

common_init()

static av_cold int common_init ( AVFilterContext *  ctx )

static

Definition at line 150 of file buffersink.c.

Referenced by asink_init(), and vsink_init().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 158 of file buffersink.c.

vsink_init()

static av_cold int vsink_init ( AVFilterContext *  ctx, void *  opaque  )

static

Definition at line 204 of file buffersink.c.

vsink_query_formats()

static int vsink_query_formats ( AVFilterContext *  ctx )

static

Definition at line 225 of file buffersink.c.

asink_init()

static av_cold int asink_init ( AVFilterContext *  ctx, void *  opaque  )

static

Definition at line 247 of file buffersink.c.

asink_query_formats()

static int asink_query_formats ( AVFilterContext *  ctx )

static

Definition at line 264 of file buffersink.c.

AVFILTER_DEFINE_CLASS() [1/2]

AVFILTER_DEFINE_CLASS

(

buffersink

)

AVFILTER_DEFINE_CLASS() [2/2]

AVFILTER_DEFINE_CLASS

(

abuffersink

)

Variable Documentation

buffersink_options

const AVOption buffersink_options[]

static

Initial value:

= {
    { "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
    { NULL },
}

Definition at line 318 of file buffersink.c.

abuffersink_options

const AVOption abuffersink_options[]

static

Initial value:

= {
    { "sample_fmts",     "set the supported sample formats",  OFFSET(sample_fmts),     AV_OPT_TYPE_BINARY, .flags = FLAGS },
    { "sample_rates",    "set the supported sample rates",    OFFSET(sample_rates),    AV_OPT_TYPE_BINARY, .flags = FLAGS },
    { "channel_layouts", "set the supported channel layouts", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
    { "channel_counts",  "set the supported channel counts",  OFFSET(channel_counts),  AV_OPT_TYPE_BINARY, .flags = FLAGS },
    { "all_channel_counts", "accept all channel counts", OFFSET(all_channel_counts), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
    { NULL },
}

Definition at line 324 of file buffersink.c.

avfilter_vsink_buffer_inputs

const AVFilterPad avfilter_vsink_buffer_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
    },
    { NULL }
}

Definition at line 337 of file buffersink.c.

ff_vsink_buffer

AVFilter ff_vsink_buffer

Initial value:

= {
    .name        = "buffersink",
    .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
    .priv_size   = sizeof(BufferSinkContext),
    .priv_class  = &buffersink_class,
    .init_opaque = vsink_init,

    .query_formats = vsink_query_formats,
    .activate    = activate,
    .inputs      = avfilter_vsink_buffer_inputs,
    .outputs     = NULL,
}

Definition at line 345 of file buffersink.c.

avfilter_asink_abuffer_inputs

const AVFilterPad avfilter_asink_abuffer_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
    },
    { NULL }
}

Definition at line 358 of file buffersink.c.

ff_asink_abuffer

AVFilter ff_asink_abuffer

Initial value:

= {
    .name        = "abuffersink",
    .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
    .priv_class  = &abuffersink_class,
    .priv_size   = sizeof(BufferSinkContext),
    .init_opaque = asink_init,

    .query_formats = asink_query_formats,
    .activate    = activate,
    .inputs      = avfilter_asink_abuffer_inputs,
    .outputs     = NULL,
}

Definition at line 366 of file buffersink.c.