libavfilter/buffersink.c - third_party/ffmpeg - Git at Google

 /*
  * 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 sink
  */

 #include "libavutil/avassert.h"
 #include "libavutil/channel_layout.h"
 #include "libavutil/common.h"
 #include "libavutil/internal.h"
 #include "libavutil/opt.h"

 #define FF_INTERNAL_FIELDS 1
 #include "framequeue.h"

 #include "audio.h"
 #include "avfilter.h"
 #include "buffersink.h"
 #include "filters.h"
 #include "internal.h"

 typedef struct BufferSinkContext {
     const AVClass *class;
     unsigned warning_limit;

     /* only used for video */
     enum AVPixelFormat *pixel_fmts;           ///< list of accepted pixel formats, must be terminated with -1
     int pixel_fmts_size;

     /* only used for audio */
     enum AVSampleFormat *sample_fmts;       ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
     int sample_fmts_size;
     int64_t *channel_layouts;               ///< list of accepted channel layouts, terminated by -1
     int channel_layouts_size;
     int *channel_counts;                    ///< list of accepted channel counts, terminated by -1
     int channel_counts_size;
     int all_channel_counts;
     int *sample_rates;                      ///< list of accepted sample rates, terminated by -1
     int sample_rates_size;

     AVFrame *peeked_frame;
 } BufferSinkContext;

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

 int attribute_align_arg av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame)
 {
     return av_buffersink_get_frame_flags(ctx, frame, 0);
 }

 static int return_or_keep_frame(BufferSinkContext *buf, AVFrame *out, AVFrame *in, int flags)
 {
     if ((flags & AV_BUFFERSINK_FLAG_PEEK)) {
         buf->peeked_frame = in;
         return out ? av_frame_ref(out, in) : 0;
     } else {
         av_assert1(out);
         buf->peeked_frame = NULL;
         av_frame_move_ref(out, in);
         av_frame_free(&in);
         return 0;
     }
 }

 static int get_frame_internal(AVFilterContext *ctx, AVFrame *frame, int flags, int samples)
 {
     BufferSinkContext *buf = ctx->priv;
     AVFilterLink *inlink = ctx->inputs[0];
     int status, ret;
     AVFrame *cur_frame;
     int64_t pts;

     if (buf->peeked_frame)
         return return_or_keep_frame(buf, frame, buf->peeked_frame, flags);

     while (1) {
         ret = samples ? ff_inlink_consume_samples(inlink, samples, samples, &cur_frame) :
                         ff_inlink_consume_frame(inlink, &cur_frame);
         if (ret < 0) {
             return ret;
         } else if (ret) {
             /* TODO return the frame instead of copying it */
             return return_or_keep_frame(buf, frame, cur_frame, flags);
         } else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
             return status;
         } else if ((flags & AV_BUFFERSINK_FLAG_NO_REQUEST)) {
             return AVERROR(EAGAIN);
         } else if (inlink->frame_wanted_out) {
             ret = ff_filter_graph_run_once(ctx->graph);
             if (ret < 0)
                 return ret;
         } else {
             ff_inlink_request_frame(inlink);
         }
     }
 }

 int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
 {
     return get_frame_internal(ctx, frame, flags, ctx->inputs[0]->min_samples);
 }

 int attribute_align_arg av_buffersink_get_samples(AVFilterContext *ctx,
                                                   AVFrame *frame, int nb_samples)
 {
     return get_frame_internal(ctx, frame, 0, nb_samples);
 }

 #if FF_API_NEXT
 AVBufferSinkParams *av_buffersink_params_alloc(void)
 {
     static const int pixel_fmts[] = { AV_PIX_FMT_NONE };
     AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams));
     if (!params)
         return NULL;

     params->pixel_fmts = pixel_fmts;
     return params;
 }

 AVABufferSinkParams *av_abuffersink_params_alloc(void)
 {
     AVABufferSinkParams *params = av_mallocz(sizeof(AVABufferSinkParams));

     if (!params)
         return NULL;
     return params;
 }
 #endif

 static av_cold int common_init(AVFilterContext *ctx)
 {
     BufferSinkContext *buf = ctx->priv;

     buf->warning_limit = 100;
     return 0;
 }

 static int activate(AVFilterContext *ctx)
 {
     BufferSinkContext *buf = ctx->priv;

     if (buf->warning_limit &&
         ff_framequeue_queued_frames(&ctx->inputs[0]->fifo) >= buf->warning_limit) {
         av_log(ctx, AV_LOG_WARNING,
                "%d buffers queued in %s, something may be wrong.\n",
                buf->warning_limit,
                (char *)av_x_if_null(ctx->name, ctx->filter->name));
         buf->warning_limit *= 10;
     }

     /* The frame is queued, the rest is up to get_frame_internal */
     return 0;
 }

 void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
 {
     AVFilterLink *inlink = ctx->inputs[0];

     inlink->min_samples = inlink->max_samples =
     inlink->partial_buf_size = frame_size;
 }

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

 MAKE_AVFILTERLINK_ACCESSOR(enum AVMediaType , type               )
 MAKE_AVFILTERLINK_ACCESSOR(AVRational       , time_base          )
 MAKE_AVFILTERLINK_ACCESSOR(int              , format             )

 MAKE_AVFILTERLINK_ACCESSOR(AVRational       , frame_rate         )
 MAKE_AVFILTERLINK_ACCESSOR(int              , w                  )
 MAKE_AVFILTERLINK_ACCESSOR(int              , h                  )
 MAKE_AVFILTERLINK_ACCESSOR(AVRational       , sample_aspect_ratio)

 MAKE_AVFILTERLINK_ACCESSOR(int              , channels           )
 MAKE_AVFILTERLINK_ACCESSOR(uint64_t         , channel_layout     )
 MAKE_AVFILTERLINK_ACCESSOR(int              , sample_rate        )

 MAKE_AVFILTERLINK_ACCESSOR(AVBufferRef *    , hw_frames_ctx      )

 #define CHECK_LIST_SIZE(field) \
         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); \
         }
 static int vsink_query_formats(AVFilterContext *ctx)
 {
     BufferSinkContext *buf = ctx->priv;
     AVFilterFormats *formats = NULL;
     unsigned i;
     int ret;

     CHECK_LIST_SIZE(pixel_fmts)
     if (buf->pixel_fmts_size) {
         for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++)
             if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0)
                 return ret;
         if ((ret = ff_set_common_formats(ctx, formats)) < 0)
             return ret;
     } else {
         if ((ret = ff_default_query_formats(ctx)) < 0)
             return ret;
     }

     return 0;
 }

 static int asink_query_formats(AVFilterContext *ctx)
 {
     BufferSinkContext *buf = ctx->priv;
     AVFilterFormats *formats = NULL;
     AVFilterChannelLayouts *layouts = NULL;
     unsigned i;
     int ret;

     CHECK_LIST_SIZE(sample_fmts)
     CHECK_LIST_SIZE(sample_rates)
     CHECK_LIST_SIZE(channel_layouts)
     CHECK_LIST_SIZE(channel_counts)

     if (buf->sample_fmts_size) {
         for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++)
             if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0)
                 return ret;
         if ((ret = ff_set_common_formats(ctx, formats)) < 0)
             return ret;
     }

     if (buf->channel_layouts_size || buf->channel_counts_size ||
         buf->all_channel_counts) {
         for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)
             if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0)
                 return ret;
         for (i = 0; i < NB_ITEMS(buf->channel_counts); i++)
             if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0)
                 return ret;
         if (buf->all_channel_counts) {
             if (layouts)
                 av_log(ctx, AV_LOG_WARNING,
                        "Conflicting all_channel_counts and list in options\n");
             else if (!(layouts = ff_all_channel_counts()))
                 return AVERROR(ENOMEM);
         }
         if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
             return ret;
     }

     if (buf->sample_rates_size) {
         formats = NULL;
         for (i = 0; i < NB_ITEMS(buf->sample_rates); i++)
             if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0)
                 return ret;
         if ((ret = ff_set_common_samplerates(ctx, formats)) < 0)
             return ret;
     }

     return 0;
 }

 #define OFFSET(x) offsetof(BufferSinkContext, x)
 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 static const AVOption buffersink_options[] = {
     { "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
     { NULL },
 };
 #undef FLAGS
 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
 static const AVOption abuffersink_options[] = {
     { "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 },
 };
 #undef FLAGS

 AVFILTER_DEFINE_CLASS(buffersink);
 AVFILTER_DEFINE_CLASS(abuffersink);

 static const AVFilterPad avfilter_vsink_buffer_inputs[] = {
     {
         .name = "default",
         .type = AVMEDIA_TYPE_VIDEO,
     },
     { NULL }
 };

 AVFilter ff_vsink_buffer = {
     .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          = common_init,
     .query_formats = vsink_query_formats,
     .activate      = activate,
     .inputs        = avfilter_vsink_buffer_inputs,
     .outputs       = NULL,
 };

 static const AVFilterPad avfilter_asink_abuffer_inputs[] = {
     {
         .name = "default",
         .type = AVMEDIA_TYPE_AUDIO,
     },
     { NULL }
 };

 AVFilter ff_asink_abuffer = {
     .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          = common_init,
     .query_formats = asink_query_formats,
     .activate      = activate,
     .inputs        = avfilter_asink_abuffer_inputs,
     .outputs       = NULL,
 };
	/*
	* 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 sink
	*/

	#include "libavutil/avassert.h"
	#include "libavutil/channel_layout.h"
	#include "libavutil/common.h"
	#include "libavutil/internal.h"
	#include "libavutil/opt.h"

	#define FF_INTERNAL_FIELDS 1
	#include "framequeue.h"

	#include "audio.h"
	#include "avfilter.h"
	#include "buffersink.h"
	#include "filters.h"
	#include "internal.h"

	typedef struct BufferSinkContext {
	const AVClass *class;
	unsigned warning_limit;

	/* only used for video */
	enum AVPixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1
	int pixel_fmts_size;

	/* only used for audio */
	enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
	int sample_fmts_size;
	int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1
	int channel_layouts_size;
	int *channel_counts; ///< list of accepted channel counts, terminated by -1
	int channel_counts_size;
	int all_channel_counts;
	int *sample_rates; ///< list of accepted sample rates, terminated by -1
	int sample_rates_size;

	AVFrame *peeked_frame;
	} BufferSinkContext;

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

	int attribute_align_arg av_buffersink_get_frame(AVFilterContext ctx, AVFrame frame)
	{
	return av_buffersink_get_frame_flags(ctx, frame, 0);
	}

	static int return_or_keep_frame(BufferSinkContext buf, AVFrame out, AVFrame *in, int flags)
	{
	if ((flags & AV_BUFFERSINK_FLAG_PEEK)) {
	buf->peeked_frame = in;
	return out ? av_frame_ref(out, in) : 0;
	} else {
	av_assert1(out);
	buf->peeked_frame = NULL;
	av_frame_move_ref(out, in);
	av_frame_free(&in);
	return 0;
	}
	}

	static int get_frame_internal(AVFilterContext ctx, AVFrame frame, int flags, int samples)
	{
	BufferSinkContext *buf = ctx->priv;
	AVFilterLink *inlink = ctx->inputs[0];
	int status, ret;
	AVFrame *cur_frame;
	int64_t pts;

	if (buf->peeked_frame)
	return return_or_keep_frame(buf, frame, buf->peeked_frame, flags);

	while (1) {
	ret = samples ? ff_inlink_consume_samples(inlink, samples, samples, &cur_frame) :
	ff_inlink_consume_frame(inlink, &cur_frame);
	if (ret < 0) {
	return ret;
	} else if (ret) {
	/* TODO return the frame instead of copying it */
	return return_or_keep_frame(buf, frame, cur_frame, flags);
	} else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
	return status;
	} else if ((flags & AV_BUFFERSINK_FLAG_NO_REQUEST)) {
	return AVERROR(EAGAIN);
	} else if (inlink->frame_wanted_out) {
	ret = ff_filter_graph_run_once(ctx->graph);
	if (ret < 0)
	return ret;
	} else {
	ff_inlink_request_frame(inlink);
	}
	}
	}

	int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext ctx, AVFrame frame, int flags)
	{
	return get_frame_internal(ctx, frame, flags, ctx->inputs[0]->min_samples);
	}

	int attribute_align_arg av_buffersink_get_samples(AVFilterContext *ctx,
	AVFrame *frame, int nb_samples)
	{
	return get_frame_internal(ctx, frame, 0, nb_samples);
	}

	#if FF_API_NEXT
	AVBufferSinkParams *av_buffersink_params_alloc(void)
	{
	static const int pixel_fmts[] = { AV_PIX_FMT_NONE };
	AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams));
	if (!params)
	return NULL;

	params->pixel_fmts = pixel_fmts;
	return params;
	}

	AVABufferSinkParams *av_abuffersink_params_alloc(void)
	{
	AVABufferSinkParams *params = av_mallocz(sizeof(AVABufferSinkParams));

	if (!params)
	return NULL;
	return params;
	}
	#endif

	static av_cold int common_init(AVFilterContext *ctx)
	{
	BufferSinkContext *buf = ctx->priv;

	buf->warning_limit = 100;
	return 0;
	}

	static int activate(AVFilterContext *ctx)
	{
	BufferSinkContext *buf = ctx->priv;

	if (buf->warning_limit &&
	ff_framequeue_queued_frames(&ctx->inputs[0]->fifo) >= buf->warning_limit) {
	av_log(ctx, AV_LOG_WARNING,
	"%d buffers queued in %s, something may be wrong.\n",
	buf->warning_limit,
	(char *)av_x_if_null(ctx->name, ctx->filter->name));
	buf->warning_limit *= 10;
	}

	/* The frame is queued, the rest is up to get_frame_internal */
	return 0;
	}

	void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
	{
	AVFilterLink *inlink = ctx->inputs[0];

	inlink->min_samples = inlink->max_samples =
	inlink->partial_buf_size = frame_size;
	}

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

	MAKE_AVFILTERLINK_ACCESSOR(enum AVMediaType , type )
	MAKE_AVFILTERLINK_ACCESSOR(AVRational , time_base )
	MAKE_AVFILTERLINK_ACCESSOR(int , format )

	MAKE_AVFILTERLINK_ACCESSOR(AVRational , frame_rate )
	MAKE_AVFILTERLINK_ACCESSOR(int , w )
	MAKE_AVFILTERLINK_ACCESSOR(int , h )
	MAKE_AVFILTERLINK_ACCESSOR(AVRational , sample_aspect_ratio)

	MAKE_AVFILTERLINK_ACCESSOR(int , channels )
	MAKE_AVFILTERLINK_ACCESSOR(uint64_t , channel_layout )
	MAKE_AVFILTERLINK_ACCESSOR(int , sample_rate )

	MAKE_AVFILTERLINK_ACCESSOR(AVBufferRef * , hw_frames_ctx )

	#define CHECK_LIST_SIZE(field) \
	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); \
	}
	static int vsink_query_formats(AVFilterContext *ctx)
	{
	BufferSinkContext *buf = ctx->priv;
	AVFilterFormats *formats = NULL;
	unsigned i;
	int ret;

	CHECK_LIST_SIZE(pixel_fmts)
	if (buf->pixel_fmts_size) {
	for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++)
	if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0)
	return ret;
	if ((ret = ff_set_common_formats(ctx, formats)) < 0)
	return ret;
	} else {
	if ((ret = ff_default_query_formats(ctx)) < 0)
	return ret;
	}

	return 0;
	}

	static int asink_query_formats(AVFilterContext *ctx)
	{
	BufferSinkContext *buf = ctx->priv;
	AVFilterFormats *formats = NULL;
	AVFilterChannelLayouts *layouts = NULL;
	unsigned i;
	int ret;

	CHECK_LIST_SIZE(sample_fmts)
	CHECK_LIST_SIZE(sample_rates)
	CHECK_LIST_SIZE(channel_layouts)
	CHECK_LIST_SIZE(channel_counts)

	if (buf->sample_fmts_size) {
	for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++)
	if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0)
	return ret;
	if ((ret = ff_set_common_formats(ctx, formats)) < 0)
	return ret;
	}

	if (buf->channel_layouts_size \|\| buf->channel_counts_size \|\|
	buf->all_channel_counts) {
	for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)
	if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0)
	return ret;
	for (i = 0; i < NB_ITEMS(buf->channel_counts); i++)
	if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0)
	return ret;
	if (buf->all_channel_counts) {
	if (layouts)
	av_log(ctx, AV_LOG_WARNING,
	"Conflicting all_channel_counts and list in options\n");
	else if (!(layouts = ff_all_channel_counts()))
	return AVERROR(ENOMEM);
	}
	if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
	return ret;
	}

	if (buf->sample_rates_size) {
	formats = NULL;
	for (i = 0; i < NB_ITEMS(buf->sample_rates); i++)
	if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0)
	return ret;
	if ((ret = ff_set_common_samplerates(ctx, formats)) < 0)
	return ret;
	}

	return 0;
	}

	#define OFFSET(x) offsetof(BufferSinkContext, x)
	#define FLAGS AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_VIDEO_PARAM
	static const AVOption buffersink_options[] = {
	{ "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
	{ NULL },
	};
	#undef FLAGS
	#define FLAGS AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_AUDIO_PARAM
	static const AVOption abuffersink_options[] = {
	{ "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 },
	};
	#undef FLAGS

	AVFILTER_DEFINE_CLASS(buffersink);
	AVFILTER_DEFINE_CLASS(abuffersink);

	static const AVFilterPad avfilter_vsink_buffer_inputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_VIDEO,
	},
	{ NULL }
	};

	AVFilter ff_vsink_buffer = {
	.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 = common_init,
	.query_formats = vsink_query_formats,
	.activate = activate,
	.inputs = avfilter_vsink_buffer_inputs,
	.outputs = NULL,
	};

	static const AVFilterPad avfilter_asink_abuffer_inputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_AUDIO,
	},
	{ NULL }
	};

	AVFilter ff_asink_abuffer = {
	.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 = common_init,
	.query_formats = asink_query_formats,
	.activate = activate,
	.inputs = avfilter_asink_abuffer_inputs,
	.outputs = NULL,
	};