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lavfi: add vsink_buffer, and use it in ff* tools

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Also add the public interface libavfilter/vsink_buffer.h.
This commit is contained in:
Stefano Sabatini 2011-06-11 18:43:11 +02:00
parent e89ba76a59
commit 44f669e7bc
12 changed files with 199 additions and 99 deletions
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1
Changelog
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@ -17,6 +17,7 @@ version 0.7:
- 4:4:4 H.264 decoding support
- 10-bit H.264 optimizations for x86
- lut, lutrgb, and lutyuv filters added
- buffersink libavfilter sink added
version 0.7_beta2:

68
cmdutils.c
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@ -962,71 +962,3 @@ FILE *get_preset_file(char *filename, size_t filename_size,
return f;
}
#if CONFIG_AVFILTER
static int ffsink_init(AVFilterContext *ctx, const char *args, void *opaque)
{
FFSinkContext *priv = ctx->priv;
if (!opaque)
return AVERROR(EINVAL);
*priv = *(FFSinkContext *)opaque;
return 0;
}
static void null_end_frame(AVFilterLink *inlink) { }
static int ffsink_query_formats(AVFilterContext *ctx)
{
FFSinkContext *priv = ctx->priv;
enum PixelFormat pix_fmts[] = { priv->pix_fmt, PIX_FMT_NONE };
avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
return 0;
}
AVFilter ffsink = {
.name = "ffsink",
.priv_size = sizeof(FFSinkContext),
.init = ffsink_init,
.query_formats = ffsink_query_formats,
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.end_frame = null_end_frame,
.min_perms = AV_PERM_READ, },
{ .name = NULL }},
.outputs = (AVFilterPad[]) {{ .name = NULL }},
};
int get_filtered_video_frame(AVFilterContext *ctx, AVFrame *frame,
AVFilterBufferRef **picref_ptr, AVRational *tb)
{
int ret;
AVFilterBufferRef *picref;
*picref_ptr = NULL;
if ((ret = avfilter_request_frame(ctx->inputs[0])) < 0)
return ret;
if (!(picref = ctx->inputs[0]->cur_buf))
return AVERROR(ENOENT);
*picref_ptr = picref;
ctx->inputs[0]->cur_buf = NULL;
*tb = ctx->inputs[0]->time_base;
memcpy(frame->data, picref->data, sizeof(frame->data));
memcpy(frame->linesize, picref->linesize, sizeof(frame->linesize));
frame->pkt_pos = picref->pos;
frame->interlaced_frame = picref->video->interlaced;
frame->top_field_first = picref->video->top_field_first;
frame->key_frame = picref->video->key_frame;
frame->pict_type = picref->video->pict_type;
frame->sample_aspect_ratio = picref->video->sample_aspect_ratio;
return 1;
}
#endif /* CONFIG_AVFILTER */

15
cmdutils.h
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@ -260,19 +260,4 @@ int read_file(const char *filename, char **bufptr, size_t *size);
FILE *get_preset_file(char *filename, size_t filename_size,
const char *preset_name, int is_path, const char *codec_name);
typedef struct {
enum PixelFormat pix_fmt;
} FFSinkContext;
extern AVFilter ffsink;
/**
* Extract a frame from sink.
*
* @return a negative error in case of failure, 1 if one frame has
* been extracted successfully.
*/
int get_filtered_video_frame(AVFilterContext *sink, AVFrame *frame,
AVFilterBufferRef **picref, AVRational *pts_tb);
#endif /* FFMPEG_CMDUTILS_H */

3
doc/APIchanges
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@ -13,6 +13,9 @@ libavutil: 2011-04-18
API changes, most recent first:
2011-06-19 - xxxxxxx - lavfi 2.21.0 - vsink_buffer.h
Add video sink buffer and vsink_buffer.h public header.
2011-06-12 - xxxxxxx - lavfi 2.18.0 - avcodec.h
Add avfilter_get_video_buffer_ref_from_frame() function in
libavfilter/avcodec.h.

13
doc/filters.texi
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@ -1977,6 +1977,19 @@ frei0r_src=200x200:10:partik0l=1234 [overlay]; [in][overlay] overlay
Below is a description of the currently available video sinks.
@section buffersink
Buffer video frames, and make them available to the end of the filter
graph.
This sink is mainly intended for a programmatic use, in particular
through the interface defined in @file{libavfilter/vsink_buffer.h}.
It does not require a string parameter in input, but you need to
specify a pointer to a list of supported pixel formats terminated by
-1 in the opaque parameter provided to @code{avfilter_init_filter}
when initializing this sink.
@section nullsink
Null video sink, do absolutely nothing with the input video. It is

20
ffmpeg.c
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@ -51,6 +51,7 @@
# include "libavfilter/avcodec.h"
# include "libavfilter/avfilter.h"
# include "libavfilter/avfiltergraph.h"
# include "libavfilter/vsink_buffer.h"
# include "libavfilter/vsrc_buffer.h"
#endif
@ -363,7 +364,7 @@ static int configure_video_filters(AVInputStream *ist, AVOutputStream *ost)
/** filter graph containing all filters including input & output */
AVCodecContext *codec = ost->st->codec;
AVCodecContext *icodec = ist->st->codec;
FFSinkContext ffsink_ctx = { .pix_fmt = codec->pix_fmt };
enum PixelFormat pix_fmts[] = { codec->pix_fmt, PIX_FMT_NONE };
AVRational sample_aspect_ratio;
char args[255];
int ret;
@ -383,8 +384,8 @@ static int configure_video_filters(AVInputStream *ist, AVOutputStream *ost)
"src", args, NULL, ost->graph);
if (ret < 0)
return ret;
ret = avfilter_graph_create_filter(&ost->output_video_filter, &ffsink,
"out", NULL, &ffsink_ctx, ost->graph);
ret = avfilter_graph_create_filter(&ost->output_video_filter, avfilter_get_by_name("buffersink"),
"out", NULL, pix_fmts, ost->graph);
if (ret < 0)
return ret;
last_filter = ost->input_video_filter;
@ -1708,12 +1709,15 @@ static int output_packet(AVInputStream *ist, int ist_index,
frame_available = ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO ||
!ost->output_video_filter || avfilter_poll_frame(ost->output_video_filter->inputs[0]);
while (frame_available) {
AVRational ist_pts_tb;
if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && ost->output_video_filter)
if (get_filtered_video_frame(ost->output_video_filter, &picture, &ost->picref, &ist_pts_tb) < 0)
if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && ost->output_video_filter) {
AVRational ist_pts_tb = ost->output_video_filter->inputs[0]->time_base;
if (av_vsink_buffer_get_video_buffer_ref(ost->output_video_filter, &ost->picref, 0) < 0)
goto cont;
if (ost->picref)
ist->pts = av_rescale_q(ost->picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
if (ost->picref) {
avfilter_fill_frame_from_video_buffer_ref(&picture, ost->picref);
ist->pts = av_rescale_q(ost->picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
}
}
#endif
os = output_files[ost->file_index];

14
ffplay.c
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@ -41,6 +41,7 @@
# include "libavfilter/avcodec.h"
# include "libavfilter/avfilter.h"
# include "libavfilter/avfiltergraph.h"
# include "libavfilter/vsink_buffer.h"
#endif
#include <SDL.h>
@ -1682,7 +1683,7 @@ static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const c
{
char sws_flags_str[128];
int ret;
FFSinkContext ffsink_ctx = { .pix_fmt = PIX_FMT_YUV420P };
enum PixelFormat pix_fmts[] = { PIX_FMT_YUV420P, PIX_FMT_NONE };
AVFilterContext *filt_src = NULL, *filt_out = NULL;
snprintf(sws_flags_str, sizeof(sws_flags_str), "flags=%d", sws_flags);
graph->scale_sws_opts = av_strdup(sws_flags_str);
@ -1690,8 +1691,8 @@ static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const c
if ((ret = avfilter_graph_create_filter(&filt_src, &input_filter, "src",
NULL, is, graph)) < 0)
goto the_end;
if ((ret = avfilter_graph_create_filter(&filt_out, &ffsink, "out",
NULL, &ffsink_ctx, graph)) < 0)
if ((ret = avfilter_graph_create_filter(&filt_out, avfilter_get_by_name("buffersink"), "out",
NULL, pix_fmts, graph)) < 0)
goto the_end;
if(vfilters) {
@ -1748,13 +1749,14 @@ static int video_thread(void *arg)
AVPacket pkt;
#else
AVFilterBufferRef *picref;
AVRational tb;
AVRational tb = filt_out->inputs[0]->time_base;
#endif
while (is->paused && !is->videoq.abort_request)
SDL_Delay(10);
#if CONFIG_AVFILTER
ret = get_filtered_video_frame(filt_out, frame, &picref, &tb);
ret = av_vsink_buffer_get_video_buffer_ref(filt_out, &picref, 0);
if (picref) {
avfilter_fill_frame_from_video_buffer_ref(frame, picref);
pts_int = picref->pts;
pos = picref->pos;
frame->opaque = picref;
@ -1776,7 +1778,7 @@ static int video_thread(void *arg)
if (ret < 0) goto the_end;
if (!ret)
if (!picref)
continue;
pts = pts_int*av_q2d(is->video_st->time_base);

3
libavfilter/Makefile
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@ -6,7 +6,7 @@ FFLIBS-$(CONFIG_MOVIE_FILTER) += avformat avcodec
FFLIBS-$(CONFIG_SCALE_FILTER) += swscale
FFLIBS-$(CONFIG_MP_FILTER) += avcodec
HEADERS = avcodec.h avfilter.h avfiltergraph.h vsrc_buffer.h
HEADERS = avcodec.h avfilter.h avfiltergraph.h vsink_buffer.hvsrc_buffer.h
OBJS = allfilters.o \
avfilter.o \
@ -69,6 +69,7 @@ OBJS-$(CONFIG_FREI0R_SRC_FILTER) += vf_frei0r.o
OBJS-$(CONFIG_MOVIE_FILTER) += vsrc_movie.o
OBJS-$(CONFIG_NULLSRC_FILTER) += vsrc_nullsrc.o
OBJS-$(CONFIG_BUFFERSINK_FILTER) += vsink_buffer.o
OBJS-$(CONFIG_NULLSINK_FILTER) += vsink_nullsink.o

1
libavfilter/allfilters.c
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@ -85,5 +85,6 @@ void avfilter_register_all(void)
REGISTER_FILTER (MOVIE, movie, vsrc);
REGISTER_FILTER (NULLSRC, nullsrc, vsrc);
REGISTER_FILTER (BUFFER, buffersink, vsink);
REGISTER_FILTER (NULLSINK, nullsink, vsink);
}

2
libavfilter/avfilter.h
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@ -26,7 +26,7 @@
#include "libavutil/samplefmt.h"
#define LIBAVFILTER_VERSION_MAJOR 2
#define LIBAVFILTER_VERSION_MINOR 20
#define LIBAVFILTER_VERSION_MINOR 21
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

111
libavfilter/vsink_buffer.c Normal file
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@ -0,0 +1,111 @@
/*
* Copyright (c) 2011 Stefano Sabatini
*
* 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
* buffer video sink
*/
#include "avfilter.h"
#include "vsink_buffer.h"
typedef struct {
AVFilterBufferRef *picref; ///< cached picref
enum PixelFormat *pix_fmts; ///< accepted pixel formats, must be terminated with -1
} BufferSinkContext;
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
BufferSinkContext *buf = ctx->priv;
if (!opaque) {
av_log(ctx, AV_LOG_ERROR, "No opaque field provided, which is required.\n");
return AVERROR(EINVAL);
}
buf->pix_fmts = opaque;
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
BufferSinkContext *buf = ctx->priv;
if (buf->picref)
avfilter_unref_buffer(buf->picref);
buf->picref = NULL;
}
static void end_frame(AVFilterLink *inlink)
{
BufferSinkContext *buf = inlink->dst->priv;
if (buf->picref) /* drop the last cached frame */
avfilter_unref_buffer(buf->picref);
buf->picref = inlink->cur_buf;
}
static int query_formats(AVFilterContext *ctx)
{
BufferSinkContext *buf = ctx->priv;
avfilter_set_common_formats(ctx, avfilter_make_format_list(buf->pix_fmts));
return 0;
}
int av_vsink_buffer_get_video_buffer_ref(AVFilterContext *ctx,
AVFilterBufferRef **picref, int flags)
{
BufferSinkContext *buf = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
int ret;
*picref = NULL;
/* no picref available, fetch it from the filterchain */
if (!buf->picref) {
if ((ret = avfilter_request_frame(inlink)) < 0)
return ret;
}
if (!buf->picref)
return AVERROR(EINVAL);
*picref = buf->picref;
if (!(flags & AV_VSINK_BUF_FLAG_PEEK))
buf->picref = NULL;
return 0;
}
AVFilter avfilter_vsink_buffersink = {
.name = "buffersink",
.priv_size = sizeof(BufferSinkContext),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.end_frame = end_frame,
.min_perms = AV_PERM_READ, },
{ .name = NULL }},
.outputs = (AVFilterPad[]) {{ .name = NULL }},
};

47
libavfilter/vsink_buffer.h Normal file
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@ -0,0 +1,47 @@
/*
* 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
*/
#ifndef AVFILTER_VSINK_BUFFER_H
#define AVFILTER_VSINK_BUFFER_H
/**
* @file
* memory buffer sink API for video
*/
#include "avfilter.h"
/**
* Tell av_vsink_buffer_get_video_buffer_ref() to read the picref, but not
* remove it from the buffer. This is useful if you need only to read
* the picref, without to fetch it.
*/
#define AV_VSINK_BUF_FLAG_PEEK 1
/**
* Get a video buffer data from buffer_sink and put it in picref.
*
* @param buffer_sink pointer to a buffer sink context
* @param flags a combination of AV_VSINK_BUF_FLAG_* flags
* @return >= 0 in case of success, a negative AVERROR code in case of
* failure
*/
int av_vsink_buffer_get_video_buffer_ref(AVFilterContext *buffer_sink,
AVFilterBufferRef **picref, int flags);
#endif /* AVFILTER_VSINK_BUFFER_H */