Libav
Data Structures | Macros | Functions | Variables
buffersrc.c File Reference

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"

Go to the source code of this file.

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, format)
 
#define WRAP_PLANE(ref_out, data, data_size)
 
#define OFFSET(x)   offsetof(BufferSourceContext, x)
 
#define A   AV_OPT_FLAG_AUDIO_PARAM
 
#define V   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. More...
 
int attribute_align_arg av_buffersrc_add_frame (AVFilterContext *ctx, AVFrame *frame)
 Add a frame to the buffer source. More...
 
static FF_DISABLE_DEPRECATION_WARNINGS void compat_free_buffer (void *opaque, uint8_t *data)
 
static void compat_unref_buffer (void *opaque, uint8_t *data)
 
int av_buffersrc_buffer (AVFilterContext *ctx, AVFilterBufferRef *buf)
 
static FF_ENABLE_DEPRECATION_WARNINGS av_cold int init_video (AVFilterContext *ctx)
 
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 video_options []
 
static const AVClass buffer_class
 
static const AVOption audio_options []
 
static const AVClass abuffer_class
 
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

§ CHECK_VIDEO_PARAM_CHANGE

#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_ERROR, "Changing frame properties on the fly is not supported.\n");\
return AVERROR(EINVAL);\
}
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
#define AVERROR(e)
Definition: error.h:43
static int width
Definition: utils.c:156
int height
Definition: gxfenc.c:72

Definition at line 64 of file buffersrc.c.

Referenced by av_buffersrc_add_frame().

§ CHECK_AUDIO_PARAM_CHANGE

#define CHECK_AUDIO_PARAM_CHANGE (   s,
  c,
  srate,
  ch_layout,
  format 
)
Value:
if (c->sample_fmt != format || c->sample_rate != srate ||\
c->channel_layout != ch_layout) {\
av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
return AVERROR(EINVAL);\
}
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
#define AVERROR(e)
Definition: error.h:43

Definition at line 70 of file buffersrc.c.

Referenced by av_buffersrc_add_frame().

§ WRAP_PLANE

#define WRAP_PLANE (   ref_out,
  data,
  data_size 
)
Value:
do { \
AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf); \
if (!dummy_ref) { \
ret = AVERROR(ENOMEM); \
goto fail; \
} \
ref_out = av_buffer_create(data, data_size, compat_unref_buffer, \
dummy_ref, 0); \
if (!ref_out) { \
av_frame_unref(frame); \
ret = AVERROR(ENOMEM); \
goto fail; \
} \
} while (0)
const char data[16]
Definition: mxf.c:70
#define AVERROR(e)
Definition: error.h:43
AVBufferRef * av_buffer_create(uint8_t *data, int size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:28
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:92
static void compat_unref_buffer(void *opaque, uint8_t *data)
Definition: buffersrc.c:156

Referenced by av_buffersrc_buffer().

§ OFFSET

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

Definition at line 280 of file buffersrc.c.

§ A

#define A   AV_OPT_FLAG_AUDIO_PARAM

Definition at line 281 of file buffersrc.c.

§ V

#define V   AV_OPT_FLAG_VIDEO_PARAM

Definition at line 282 of file buffersrc.c.

Function Documentation

§ compat_free_buffer()

static FF_DISABLE_DEPRECATION_WARNINGS void compat_free_buffer ( void opaque,
uint8_t data 
)
static

Definition at line 150 of file buffersrc.c.

Referenced by av_buffersrc_buffer().

§ compat_unref_buffer()

static void compat_unref_buffer ( void opaque,
uint8_t data 
)
static

Definition at line 156 of file buffersrc.c.

§ av_buffersrc_buffer()

int av_buffersrc_buffer ( AVFilterContext ctx,
AVFilterBufferRef *  buf 
)

Definition at line 162 of file buffersrc.c.

§ init_video()

static FF_ENABLE_DEPRECATION_WARNINGS av_cold int init_video ( AVFilterContext ctx)
static

Definition at line 255 of file buffersrc.c.

§ init_audio()

static av_cold int init_audio ( AVFilterContext ctx)
static

Definition at line 323 of file buffersrc.c.

§ uninit()

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 355 of file buffersrc.c.

§ query_formats()

static int query_formats ( AVFilterContext ctx)
static

Definition at line 367 of file buffersrc.c.

§ config_props()

static int config_props ( AVFilterLink link)
static

Definition at line 396 of file buffersrc.c.

§ request_frame()

static int request_frame ( AVFilterLink link)
static

Definition at line 418 of file buffersrc.c.

§ poll_frame()

static int poll_frame ( AVFilterLink link)
static

Definition at line 436 of file buffersrc.c.

Variable Documentation

§ video_options

const AVOption video_options[]
static
Initial value:
= {
{ "width", NULL, OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "height", NULL, OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "pix_fmt", NULL, OFFSET(pix_fmt_str), AV_OPT_TYPE_STRING, .flags = V },
{ "time_base_num", "deprecated, do not use", OFFSET(time_base.num), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "time_base_den", "deprecated, do not use", OFFSET(time_base.den), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "sar_num", "deprecated, do not use", OFFSET(pixel_aspect.num), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "sar_den", "deprecated, do not use", OFFSET(pixel_aspect.den), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
{ "sar", "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 },
{ NULL },
}
int num
numerator
Definition: rational.h:44
static const AVRational pixel_aspect[17]
Definition: h264_ps.c:40
#define OFFSET(x)
Definition: buffersrc.c:280
AVRational time_base
Time base.
Definition: x11grab.c:63
NULL
Definition: eval.c:55
#define V
Definition: buffersrc.c:282
int den
denominator
Definition: rational.h:45

Definition at line 284 of file buffersrc.c.

§ buffer_class

const AVClass buffer_class
static
Initial value:
= {
.class_name = "buffer source",
.item_name = av_default_item_name,
.option = video_options,
}
static const AVOption video_options[]
Definition: buffersrc.c:284
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
av_default_item_name
Definition: dnxhdenc.c:52

Definition at line 301 of file buffersrc.c.

§ audio_options

const AVOption audio_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_str), AV_OPT_TYPE_STRING, .flags = A },
{ "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A },
{ NULL },
}
#define OFFSET(x)
Definition: buffersrc.c:280
AVRational time_base
Time base.
Definition: x11grab.c:63
#define A
Definition: buffersrc.c:281
NULL
Definition: eval.c:55

Definition at line 308 of file buffersrc.c.

§ abuffer_class

const AVClass abuffer_class
static
Initial value:
= {
.class_name = "abuffer source",
.item_name = av_default_item_name,
.option = audio_options,
}
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
av_default_item_name
Definition: dnxhdenc.c:52
static const AVOption audio_options[]
Definition: buffersrc.c:308

Definition at line 316 of file buffersrc.c.

§ avfilter_vsrc_buffer_outputs

const AVFilterPad avfilter_vsrc_buffer_outputs[]
static
Initial value:
= {
{
.name = "default",
.request_frame = request_frame,
.poll_frame = poll_frame,
.config_props = config_props,
},
{ NULL }
}
static int poll_frame(AVFilterLink *link)
Definition: buffersrc.c:436
static int request_frame(AVFilterLink *link)
Definition: buffersrc.c:418
NULL
Definition: eval.c:55
static int config_props(AVFilterLink *link)
Definition: buffersrc.c:396

Definition at line 445 of file buffersrc.c.

§ ff_vsrc_buffer

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),
.priv_class = &buffer_class,
}
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:232
static const AVFilterPad avfilter_vsrc_buffer_outputs[]
Definition: buffersrc.c:445
static av_cold void uninit(AVFilterContext *ctx)
Definition: buffersrc.c:355
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
NULL
Definition: eval.c:55
static FF_ENABLE_DEPRECATION_WARNINGS av_cold int init_video(AVFilterContext *ctx)
Definition: buffersrc.c:255
static const AVClass buffer_class
Definition: buffersrc.c:301
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:221
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
static int query_formats(AVFilterContext *ctx)
Definition: buffersrc.c:367

Definition at line 456 of file buffersrc.c.

§ avfilter_asrc_abuffer_outputs

const AVFilterPad avfilter_asrc_abuffer_outputs[]
static
Initial value:
= {
{
.name = "default",
.request_frame = request_frame,
.poll_frame = poll_frame,
.config_props = config_props,
},
{ NULL }
}
static int poll_frame(AVFilterLink *link)
Definition: buffersrc.c:436
static int request_frame(AVFilterLink *link)
Definition: buffersrc.c:418
NULL
Definition: eval.c:55
static int config_props(AVFilterLink *link)
Definition: buffersrc.c:396

Definition at line 470 of file buffersrc.c.

§ ff_asrc_abuffer

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),
.priv_class = &abuffer_class,
}
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:232
static av_cold void uninit(AVFilterContext *ctx)
Definition: buffersrc.c:355
static const AVClass abuffer_class
Definition: buffersrc.c:316
static const AVFilterPad avfilter_asrc_abuffer_outputs[]
Definition: buffersrc.c:470
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
static av_cold int init_audio(AVFilterContext *ctx)
Definition: buffersrc.c:323
NULL
Definition: eval.c:55
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:221
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
static int query_formats(AVFilterContext *ctx)
Definition: buffersrc.c:367

Definition at line 481 of file buffersrc.c.