memory buffer source filter More...

#include <float.h>
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/fifo.h"
#include "libavutil/frame.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "audio.h"
#include "avfilter.h"
#include "buffersrc.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "avcodec.h"

Data Structures
struct	BufferSourceContext

Macros
#define	CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format)

#define	CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, ch_count, format)

#define	OFFSET(x) offsetof(BufferSourceContext, x)

#define	A AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_AUDIO_PARAM

#define	V AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_VIDEO_PARAM

Functions
int attribute_align_arg	av_buffersrc_write_frame (AVFilterContext ctx, const AVFrame frame)
	Add a frame to the buffer source.

int attribute_align_arg	av_buffersrc_add_frame (AVFilterContext ctx, AVFrame frame)
	Add a frame to the buffer source.

static int	av_buffersrc_add_frame_internal (AVFilterContext ctx, AVFrame frame, int flags)

int attribute_align_arg	av_buffersrc_add_frame_flags (AVFilterContext ctx, AVFrame frame, int flags)
	Add a frame to the buffer source.

static av_cold int	init_video (AVFilterContext *ctx)

unsigned	av_buffersrc_get_nb_failed_requests (AVFilterContext *buffer_src)
	Get the number of failed requests.

	AVFILTER_DEFINE_CLASS (buffer)

	AVFILTER_DEFINE_CLASS (abuffer)

static av_cold int	init_audio (AVFilterContext *ctx)

static av_cold void	uninit (AVFilterContext *ctx)

static int	query_formats (AVFilterContext *ctx)

static int	config_props (AVFilterLink *link)

static int	request_frame (AVFilterLink *link)

static int	poll_frame (AVFilterLink *link)

Variables
static const AVOption	buffer_options []

static const AVOption	abuffer_options []

static const AVFilterPad	avfilter_vsrc_buffer_outputs []

AVFilter	ff_vsrc_buffer

static const AVFilterPad	avfilter_asrc_abuffer_outputs []

AVFilter	ff_asrc_abuffer

Detailed Description

memory buffer source filter

Definition in file buffersrc.c.

Macro Definition Documentation

#define CHECK_VIDEO_PARAM_CHANGE	(	s,
		c,
		width,
		height,
		format
	)

Value:

if (c->w != width || c->h != height || c->pix_fmt != format) {\
        av_log(s, AV_LOG_INFO, "Changing frame properties on the fly is not supported by all filters.\n");\
    }

Definition at line 68 of file buffersrc.c.

Referenced by av_buffersrc_add_frame_internal().

#define CHECK_AUDIO_PARAM_CHANGE	(	s,
		c,
		srate,
		ch_layout,
		ch_count,
		format
	)

Value:

if (c->sample_fmt != format || c->sample_rate != srate ||\
        c->channel_layout != ch_layout || c->channels != ch_count) {\
        av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
        return AVERROR(EINVAL);\
    }

Definition at line 73 of file buffersrc.c.

Referenced by av_buffersrc_add_frame_internal().

#define OFFSET ( x ) offsetof(BufferSourceContext, x)

Definition at line 332 of file buffersrc.c.

#define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM

Definition at line 333 of file buffersrc.c.

#define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 334 of file buffersrc.c.

Function Documentation

static int av_buffersrc_add_frame_internal	(	AVFilterContext *	ctx,
		AVFrame *	frame,
		int	flags
	)

static

Definition at line 118 of file buffersrc.c.

Referenced by av_buffersrc_add_frame_flags().

static av_cold int init_video ( AVFilterContext * ctx )

static

Definition at line 307 of file buffersrc.c.

AVFILTER_DEFINE_CLASS ( buffer )

AVFILTER_DEFINE_CLASS ( abuffer )

static av_cold int init_audio ( AVFilterContext * ctx )

static

Definition at line 370 of file buffersrc.c.

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 421 of file buffersrc.c.

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 432 of file buffersrc.c.

static int config_props ( AVFilterLink * link )

static

Definition at line 463 of file buffersrc.c.

static int request_frame ( AVFilterLink * link )

static

Definition at line 486 of file buffersrc.c.

static int poll_frame ( AVFilterLink * link )

static

Definition at line 502 of file buffersrc.c.

Variable Documentation

const AVOption buffer_options[]

static

Initial value:

= {
    { "width",         NULL,                     OFFSET(w),                AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
    { "video_size",    NULL,                     OFFSET(w),                AV_OPT_TYPE_IMAGE_SIZE,                .flags = V },
    { "height",        NULL,                     OFFSET(h),                AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
    { "pix_fmt",       NULL,                     OFFSET(pix_fmt),          AV_OPT_TYPE_PIXEL_FMT, { .i64 = AV_PIX_FMT_NONE }, .min = AV_PIX_FMT_NONE, .max = INT_MAX, .flags = V },
    { "sar",           "sample aspect ratio",    OFFSET(pixel_aspect),     AV_OPT_TYPE_RATIONAL, { .dbl = 1 }, 0, DBL_MAX, V },
    { "pixel_aspect",  "sample aspect ratio",    OFFSET(pixel_aspect),     AV_OPT_TYPE_RATIONAL, { .dbl = 1 }, 0, DBL_MAX, V },
    { "time_base",     NULL,                     OFFSET(time_base),        AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
    { "frame_rate",    NULL,                     OFFSET(frame_rate),       AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
    { "sws_param",     NULL,                     OFFSET(sws_param),        AV_OPT_TYPE_STRING,                    .flags = V },
    { NULL },
}

Definition at line 336 of file buffersrc.c.

const AVOption abuffer_options[]

static

Initial value:

= {
    { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
    { "sample_rate",    NULL, OFFSET(sample_rate),         AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, A },
    { "sample_fmt",     NULL, OFFSET(sample_fmt),          AV_OPT_TYPE_SAMPLE_FMT, { .i64 = AV_SAMPLE_FMT_NONE }, .min = AV_SAMPLE_FMT_NONE, .max = INT_MAX, .flags = A },
    { "channel_layout", NULL, OFFSET(channel_layout_str),  AV_OPT_TYPE_STRING,             .flags = A },
    { "channels",       NULL, OFFSET(channels),            AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, A },
    { NULL },
}

Definition at line 359 of file buffersrc.c.

const AVFilterPad avfilter_vsrc_buffer_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .request_frame = request_frame,
        .poll_frame    = poll_frame,
        .config_props  = config_props,
    },
    { NULL }
}

Definition at line 511 of file buffersrc.c.

AVFilter ff_vsrc_buffer

Initial value:

= {
    .name      = "buffer",
    .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
    .priv_size = sizeof(BufferSourceContext),
    .query_formats = query_formats,
    .init      = init_video,
    .uninit    = uninit,
    .inputs    = NULL,
    .outputs   = avfilter_vsrc_buffer_outputs,
    .priv_class = &buffer_class,
}

Definition at line 522 of file buffersrc.c.

const AVFilterPad avfilter_asrc_abuffer_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_AUDIO,
        .request_frame = request_frame,
        .poll_frame    = poll_frame,
        .config_props  = config_props,
    },
    { NULL }
}

Definition at line 536 of file buffersrc.c.

AVFilter ff_asrc_abuffer

Initial value:

= {
    .name          = "abuffer",
    .description   = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
    .priv_size     = sizeof(BufferSourceContext),
    .query_formats = query_formats,
    .init      = init_audio,
    .uninit    = uninit,
    .inputs    = NULL,
    .outputs   = avfilter_asrc_abuffer_outputs,
    .priv_class = &abuffer_class,
}

Definition at line 547 of file buffersrc.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation