FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavfilter/f_streamselect.c	Lines:	0	170	0.0 %
Date:	2020-08-11 16:46:18	Branches:	0	87	0.0 %


/*
 * 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
 */

#include "libavutil/avstring.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "formats.h"
#include "framesync.h"
#include "internal.h"
#include "video.h"

typedef struct StreamSelectContext {
    const AVClass *class;
    int nb_inputs;
    char *map_str;
    int *map;
    int nb_map;
    int is_audio;
    int64_t *last_pts;
    AVFrame **frames;
    FFFrameSync fs;
} StreamSelectContext;

#define OFFSET(x) offsetof(StreamSelectContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
#define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption streamselect_options[] = {
    { "inputs",  "number of input streams",           OFFSET(nb_inputs),  AV_OPT_TYPE_INT,    {.i64=2},    2, INT_MAX,  .flags=FLAGS },
    { "map",     "input indexes to remap to outputs", OFFSET(map_str),    AV_OPT_TYPE_STRING, {.str=NULL},              .flags=TFLAGS },
    { NULL }
};

AVFILTER_DEFINE_CLASS(streamselect);

static int process_frame(FFFrameSync *fs)
{
    AVFilterContext *ctx = fs->parent;
    StreamSelectContext *s = fs->opaque;
    AVFrame **in = s->frames;
    int i, j, ret = 0, have_out = 0;

    for (i = 0; i < ctx->nb_inputs; i++) {
        if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
            return ret;
    }

    for (j = 0; j < ctx->nb_inputs; j++) {
        for (i = 0; i < s->nb_map; i++) {
            if (s->map[i] == j) {
                AVFrame *out;

                if (s->is_audio && s->last_pts[j] == in[j]->pts &&
                    ctx->outputs[i]->frame_count_in > 0)
                    continue;
                out = av_frame_clone(in[j]);
                if (!out)
                    return AVERROR(ENOMEM);

                out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, ctx->outputs[i]->time_base);
                s->last_pts[j] = in[j]->pts;
                ret = ff_filter_frame(ctx->outputs[i], out);
                have_out = 1;
                if (ret < 0)
                    return ret;
            }
        }
    }

    if (!have_out)
        ff_filter_set_ready(ctx, 100);
    return ret;
}

static int activate(AVFilterContext *ctx)
{
    StreamSelectContext *s = ctx->priv;
    return ff_framesync_activate(&s->fs);
}

static int config_output(AVFilterLink *outlink)
{
    AVFilterContext *ctx = outlink->src;
    StreamSelectContext *s = ctx->priv;
    const int outlink_idx = FF_OUTLINK_IDX(outlink);
    const int inlink_idx  = s->map[outlink_idx];
    AVFilterLink *inlink = ctx->inputs[inlink_idx];
    FFFrameSyncIn *in;
    int i, ret;

    av_log(ctx, AV_LOG_VERBOSE, "config output link %d "
           "with settings from input link %d\n",
           outlink_idx, inlink_idx);

    switch (outlink->type) {
    case AVMEDIA_TYPE_VIDEO:
        outlink->w = inlink->w;
        outlink->h = inlink->h;
        outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
        outlink->frame_rate = inlink->frame_rate;
        break;
    case AVMEDIA_TYPE_AUDIO:
        outlink->sample_rate    = inlink->sample_rate;
        outlink->channels       = inlink->channels;
        outlink->channel_layout = inlink->channel_layout;
        break;
    }

    outlink->time_base = inlink->time_base;
    outlink->format = inlink->format;

    if (s->fs.opaque == s)
        return 0;

    if ((ret = ff_framesync_init(&s->fs, ctx, ctx->nb_inputs)) < 0)
        return ret;

    in = s->fs.in;
    s->fs.opaque = s;
    s->fs.on_event = process_frame;

    for (i = 0; i < ctx->nb_inputs; i++) {
        in[i].time_base = ctx->inputs[i]->time_base;
        in[i].sync      = 1;
        in[i].before    = EXT_STOP;
        in[i].after     = EXT_STOP;
    }

    s->frames = av_calloc(ctx->nb_inputs, sizeof(*s->frames));
    if (!s->frames)
        return AVERROR(ENOMEM);

    return ff_framesync_configure(&s->fs);
}

static int parse_definition(AVFilterContext *ctx, int nb_pads, int is_input, int is_audio)
{
    const char *padtype = is_input ? "in" : "out";
    int i = 0, ret = 0;

    for (i = 0; i < nb_pads; i++) {
        AVFilterPad pad = { 0 };

        pad.type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;

        pad.name = av_asprintf("%sput%d", padtype, i);
        if (!pad.name)
            return AVERROR(ENOMEM);

        av_log(ctx, AV_LOG_DEBUG, "Add %s pad %s\n", padtype, pad.name);

        if (is_input) {
            ret = ff_insert_inpad(ctx, i, &pad);
        } else {
            pad.config_props  = config_output;
            ret = ff_insert_outpad(ctx, i, &pad);
        }

        if (ret < 0) {
            av_freep(&pad.name);
            return ret;
        }
    }

    return 0;
}

static int parse_mapping(AVFilterContext *ctx, const char *map)
{
    StreamSelectContext *s = ctx->priv;
    int *new_map;
    int new_nb_map = 0;

    if (!map) {
        av_log(ctx, AV_LOG_ERROR, "mapping definition is not set\n");
        return AVERROR(EINVAL);
    }

    new_map = av_calloc(s->nb_inputs, sizeof(*new_map));
    if (!new_map)
        return AVERROR(ENOMEM);

    while (1) {
        char *p;
        const int n = strtol(map, &p, 0);

        av_log(ctx, AV_LOG_DEBUG, "n=%d map=%p p=%p\n", n, map, p);

        if (map == p)
            break;
        map = p;

        if (new_nb_map >= s->nb_inputs) {
            av_log(ctx, AV_LOG_ERROR, "Unable to map more than the %d "
                   "input pads available\n", s->nb_inputs);
            av_free(new_map);
            return AVERROR(EINVAL);
        }

        if (n < 0 || n >= ctx->nb_inputs) {
            av_log(ctx, AV_LOG_ERROR, "Input stream index %d doesn't exist "
                   "(there is only %d input streams defined)\n",
                   n, s->nb_inputs);
            av_free(new_map);
            return AVERROR(EINVAL);
        }

        av_log(ctx, AV_LOG_VERBOSE, "Map input stream %d to output stream %d\n", n, new_nb_map);
        new_map[new_nb_map++] = n;
    }

    if (!new_nb_map) {
        av_log(ctx, AV_LOG_ERROR, "invalid mapping\n");
        av_free(new_map);
        return AVERROR(EINVAL);
    }

    av_freep(&s->map);
    s->map = new_map;
    s->nb_map = new_nb_map;

    av_log(ctx, AV_LOG_VERBOSE, "%d map set\n", s->nb_map);

    return 0;
}

static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
                           char *res, int res_len, int flags)
{
    if (!strcmp(cmd, "map")) {
        int ret = parse_mapping(ctx, args);

        if (ret < 0)
            return ret;
        return avfilter_config_links(ctx);
    }
    return AVERROR(ENOSYS);
}

static av_cold int init(AVFilterContext *ctx)
{
    StreamSelectContext *s = ctx->priv;
    int ret, nb_outputs = 0;
    char *map = s->map_str;

    if (!strcmp(ctx->filter->name, "astreamselect"))
        s->is_audio = 1;

    for (; map;) {
        char *p;

        strtol(map, &p, 0);
        if (map == p)
            break;
        nb_outputs++;
        map = p;
    }

    s->last_pts = av_calloc(s->nb_inputs, sizeof(*s->last_pts));
    if (!s->last_pts)
        return AVERROR(ENOMEM);

    if ((ret = parse_definition(ctx, s->nb_inputs, 1, s->is_audio)) < 0 ||
        (ret = parse_definition(ctx, nb_outputs, 0, s->is_audio)) < 0)
        return ret;

    av_log(ctx, AV_LOG_DEBUG, "Configured with %d inpad and %d outpad\n",
           ctx->nb_inputs, ctx->nb_outputs);

    return parse_mapping(ctx, s->map_str);
}

static av_cold void uninit(AVFilterContext *ctx)
{
    StreamSelectContext *s = ctx->priv;

    av_freep(&s->last_pts);
    av_freep(&s->map);
    av_freep(&s->frames);
    ff_framesync_uninit(&s->fs);

    for (int i = 0; i < ctx->nb_inputs; i++)
        av_freep(&ctx->input_pads[i].name);

    for (int i = 0; i < ctx->nb_outputs; i++)
        av_freep(&ctx->output_pads[i].name);
}

static int query_formats(AVFilterContext *ctx)
{
    AVFilterFormats *formats, *rates = NULL;
    AVFilterChannelLayouts *layouts = NULL;
    int ret, i;

    for (i = 0; i < ctx->nb_inputs; i++) {
        formats = ff_all_formats(ctx->inputs[i]->type);
        if ((ret = ff_set_common_formats(ctx, formats)) < 0)
            return ret;

        if (ctx->inputs[i]->type == AVMEDIA_TYPE_AUDIO) {
            rates = ff_all_samplerates();
            if ((ret = ff_set_common_samplerates(ctx, rates)) < 0)
                return ret;
            layouts = ff_all_channel_counts();
            if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
                return ret;
        }
    }

    return 0;
}

AVFilter ff_vf_streamselect = {
    .name            = "streamselect",
    .description     = NULL_IF_CONFIG_SMALL("Select video streams"),
    .init            = init,
    .query_formats   = query_formats,
    .process_command = process_command,
    .uninit          = uninit,
    .activate        = activate,
    .priv_size       = sizeof(StreamSelectContext),
    .priv_class      = &streamselect_class,
    .flags           = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
};

#define astreamselect_options streamselect_options
AVFILTER_DEFINE_CLASS(astreamselect);

AVFilter ff_af_astreamselect = {
    .name            = "astreamselect",
    .description     = NULL_IF_CONFIG_SMALL("Select audio streams"),
    .init            = init,
    .query_formats   = query_formats,
    .process_command = process_command,
    .uninit          = uninit,
    .activate        = activate,
    .priv_size       = sizeof(StreamSelectContext),
    .priv_class      = &astreamselect_class,
    .flags           = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* This file is part of FFmpeg.
3			*
4			* FFmpeg is free software; you can redistribute it and/or
5			* modify it under the terms of the GNU Lesser General Public
6			* License as published by the Free Software Foundation; either
7			* version 2.1 of the License, or (at your option) any later version.
8			*
9			* FFmpeg is distributed in the hope that it will be useful,
10			* but WITHOUT ANY WARRANTY; without even the implied warranty of
11			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12			* Lesser General Public License for more details.
13			*
14			* You should have received a copy of the GNU Lesser General Public
15			* License along with FFmpeg; if not, write to the Free Software
16			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17			*/
18
19			#include "libavutil/avstring.h"
20			#include "libavutil/internal.h"
21			#include "libavutil/opt.h"
22			#include "avfilter.h"
23			#include "audio.h"
24			#include "filters.h"
25			#include "formats.h"
26			#include "framesync.h"
27			#include "internal.h"
28			#include "video.h"
29
30			typedef struct StreamSelectContext {
31			const AVClass *class;
32			int nb_inputs;
33			char *map_str;
34			int *map;
35			int nb_map;
36			int is_audio;
37			int64_t *last_pts;
38			AVFrame **frames;
39			FFFrameSync fs;
40			} StreamSelectContext;
41
42			#define OFFSET(x) offsetof(StreamSelectContext, x)
43			#define FLAGS AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_AUDIO_PARAM \| AV_OPT_FLAG_FILTERING_PARAM
44			#define TFLAGS AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_AUDIO_PARAM \| AV_OPT_FLAG_FILTERING_PARAM \| AV_OPT_FLAG_RUNTIME_PARAM
45			static const AVOption streamselect_options[] = {
46			{ "inputs", "number of input streams", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags=FLAGS },
47			{ "map", "input indexes to remap to outputs", OFFSET(map_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags=TFLAGS },
48			{ NULL }
49			};
50
51			AVFILTER_DEFINE_CLASS(streamselect);
52
53			static int process_frame(FFFrameSync *fs)
54			{
55			AVFilterContext *ctx = fs->parent;
56			StreamSelectContext *s = fs->opaque;
57			AVFrame **in = s->frames;
58			int i, j, ret = 0, have_out = 0;
59
60			for (i = 0; i < ctx->nb_inputs; i++) {
61			if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
62			return ret;
63			}
64
65			for (j = 0; j < ctx->nb_inputs; j++) {
66			for (i = 0; i < s->nb_map; i++) {
67			if (s->map[i] == j) {
68			AVFrame *out;
69
70			if (s->is_audio && s->last_pts[j] == in[j]->pts &&
71			ctx->outputs[i]->frame_count_in > 0)
72			continue;
73			out = av_frame_clone(in[j]);
74			if (!out)
75			return AVERROR(ENOMEM);
76
77			out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, ctx->outputs[i]->time_base);
78			s->last_pts[j] = in[j]->pts;
79			ret = ff_filter_frame(ctx->outputs[i], out);
80			have_out = 1;
81			if (ret < 0)
82			return ret;
83			}
84			}
85			}
86
87			if (!have_out)
88			ff_filter_set_ready(ctx, 100);
89			return ret;
90			}
91
92			static int activate(AVFilterContext *ctx)
93			{
94			StreamSelectContext *s = ctx->priv;
95			return ff_framesync_activate(&s->fs);
96			}
97
98			static int config_output(AVFilterLink *outlink)
99			{
100			AVFilterContext *ctx = outlink->src;
101			StreamSelectContext *s = ctx->priv;
102			const int outlink_idx = FF_OUTLINK_IDX(outlink);
103			const int inlink_idx = s->map[outlink_idx];
104			AVFilterLink *inlink = ctx->inputs[inlink_idx];
105			FFFrameSyncIn *in;
106			int i, ret;
107
108			av_log(ctx, AV_LOG_VERBOSE, "config output link %d "
109			"with settings from input link %d\n",
110			outlink_idx, inlink_idx);
111
112			switch (outlink->type) {
113			case AVMEDIA_TYPE_VIDEO:
114			outlink->w = inlink->w;
115			outlink->h = inlink->h;
116			outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
117			outlink->frame_rate = inlink->frame_rate;
118			break;
119			case AVMEDIA_TYPE_AUDIO:
120			outlink->sample_rate = inlink->sample_rate;
121			outlink->channels = inlink->channels;
122			outlink->channel_layout = inlink->channel_layout;
123			break;
124			}
125
126			outlink->time_base = inlink->time_base;
127			outlink->format = inlink->format;
128
129			if (s->fs.opaque == s)
130			return 0;
131
132			if ((ret = ff_framesync_init(&s->fs, ctx, ctx->nb_inputs)) < 0)
133			return ret;
134
135			in = s->fs.in;
136			s->fs.opaque = s;
137			s->fs.on_event = process_frame;
138
139			for (i = 0; i < ctx->nb_inputs; i++) {
140			in[i].time_base = ctx->inputs[i]->time_base;
141			in[i].sync = 1;
142			in[i].before = EXT_STOP;
143			in[i].after = EXT_STOP;
144			}
145
146			s->frames = av_calloc(ctx->nb_inputs, sizeof(*s->frames));
147			if (!s->frames)
148			return AVERROR(ENOMEM);
149
150			return ff_framesync_configure(&s->fs);
151			}
152
153			static int parse_definition(AVFilterContext *ctx, int nb_pads, int is_input, int is_audio)
154			{
155			const char *padtype = is_input ? "in" : "out";
156			int i = 0, ret = 0;
157
158			for (i = 0; i < nb_pads; i++) {
159			AVFilterPad pad = { 0 };
160
161			pad.type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;
162
163			pad.name = av_asprintf("%sput%d", padtype, i);
164			if (!pad.name)
165			return AVERROR(ENOMEM);
166
167			av_log(ctx, AV_LOG_DEBUG, "Add %s pad %s\n", padtype, pad.name);
168
169			if (is_input) {
170			ret = ff_insert_inpad(ctx, i, &pad);
171			} else {
172			pad.config_props = config_output;
173			ret = ff_insert_outpad(ctx, i, &pad);
174			}
175
176			if (ret < 0) {
177			av_freep(&pad.name);
178			return ret;
179			}
180			}
181
182			return 0;
183			}
184
185			static int parse_mapping(AVFilterContext ctx, const char map)
186			{
187			StreamSelectContext *s = ctx->priv;
188			int *new_map;
189			int new_nb_map = 0;
190
191			if (!map) {
192			av_log(ctx, AV_LOG_ERROR, "mapping definition is not set\n");
193			return AVERROR(EINVAL);
194			}
195
196			new_map = av_calloc(s->nb_inputs, sizeof(*new_map));
197			if (!new_map)
198			return AVERROR(ENOMEM);
199
200			while (1) {
201			char *p;
202			const int n = strtol(map, &p, 0);
203
204			av_log(ctx, AV_LOG_DEBUG, "n=%d map=%p p=%p\n", n, map, p);
205
206			if (map == p)
207			break;
208			map = p;
209
210			if (new_nb_map >= s->nb_inputs) {
211			av_log(ctx, AV_LOG_ERROR, "Unable to map more than the %d "
212			"input pads available\n", s->nb_inputs);
213			av_free(new_map);
214			return AVERROR(EINVAL);
215			}
216
217			if (n < 0 \|\| n >= ctx->nb_inputs) {
218			av_log(ctx, AV_LOG_ERROR, "Input stream index %d doesn't exist "
219			"(there is only %d input streams defined)\n",
220			n, s->nb_inputs);
221			av_free(new_map);
222			return AVERROR(EINVAL);
223			}
224
225			av_log(ctx, AV_LOG_VERBOSE, "Map input stream %d to output stream %d\n", n, new_nb_map);
226			new_map[new_nb_map++] = n;
227			}
228
229			if (!new_nb_map) {
230			av_log(ctx, AV_LOG_ERROR, "invalid mapping\n");
231			av_free(new_map);
232			return AVERROR(EINVAL);
233			}
234
235			av_freep(&s->map);
236			s->map = new_map;
237			s->nb_map = new_nb_map;
238
239			av_log(ctx, AV_LOG_VERBOSE, "%d map set\n", s->nb_map);
240
241			return 0;
242			}
243
244			static int process_command(AVFilterContext ctx, const char cmd, const char *args,
245			char *res, int res_len, int flags)
246			{
247			if (!strcmp(cmd, "map")) {
248			int ret = parse_mapping(ctx, args);
249
250			if (ret < 0)
251			return ret;
252			return avfilter_config_links(ctx);
253			}
254			return AVERROR(ENOSYS);
255			}
256
257			static av_cold int init(AVFilterContext *ctx)
258			{
259			StreamSelectContext *s = ctx->priv;
260			int ret, nb_outputs = 0;
261			char *map = s->map_str;
262
263			if (!strcmp(ctx->filter->name, "astreamselect"))
264			s->is_audio = 1;
265
266			for (; map;) {
267			char *p;
268
269			strtol(map, &p, 0);
270			if (map == p)
271			break;
272			nb_outputs++;
273			map = p;
274			}
275
276			s->last_pts = av_calloc(s->nb_inputs, sizeof(*s->last_pts));
277			if (!s->last_pts)
278			return AVERROR(ENOMEM);
279
280			if ((ret = parse_definition(ctx, s->nb_inputs, 1, s->is_audio)) < 0 \|\|
281			(ret = parse_definition(ctx, nb_outputs, 0, s->is_audio)) < 0)
282			return ret;
283
284			av_log(ctx, AV_LOG_DEBUG, "Configured with %d inpad and %d outpad\n",
285			ctx->nb_inputs, ctx->nb_outputs);
286
287			return parse_mapping(ctx, s->map_str);
288			}
289
290			static av_cold void uninit(AVFilterContext *ctx)
291			{
292			StreamSelectContext *s = ctx->priv;
293
294			av_freep(&s->last_pts);
295			av_freep(&s->map);
296			av_freep(&s->frames);
297			ff_framesync_uninit(&s->fs);
298
299			for (int i = 0; i < ctx->nb_inputs; i++)
300			av_freep(&ctx->input_pads[i].name);
301
302			for (int i = 0; i < ctx->nb_outputs; i++)
303			av_freep(&ctx->output_pads[i].name);
304			}
305
306			static int query_formats(AVFilterContext *ctx)
307			{
308			AVFilterFormats formats, rates = NULL;
309			AVFilterChannelLayouts *layouts = NULL;
310			int ret, i;
311
312			for (i = 0; i < ctx->nb_inputs; i++) {
313			formats = ff_all_formats(ctx->inputs[i]->type);
314			if ((ret = ff_set_common_formats(ctx, formats)) < 0)
315			return ret;
316
317			if (ctx->inputs[i]->type == AVMEDIA_TYPE_AUDIO) {
318			rates = ff_all_samplerates();
319			if ((ret = ff_set_common_samplerates(ctx, rates)) < 0)
320			return ret;
321			layouts = ff_all_channel_counts();
322			if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
323			return ret;
324			}
325			}
326
327			return 0;
328			}
329
330			AVFilter ff_vf_streamselect = {
331			.name = "streamselect",
332			.description = NULL_IF_CONFIG_SMALL("Select video streams"),
333			.init = init,
334			.query_formats = query_formats,
335			.process_command = process_command,
336			.uninit = uninit,
337			.activate = activate,
338			.priv_size = sizeof(StreamSelectContext),
339			.priv_class = &streamselect_class,
340			.flags = AVFILTER_FLAG_DYNAMIC_INPUTS \| AVFILTER_FLAG_DYNAMIC_OUTPUTS,
341			};
342
343			#define astreamselect_options streamselect_options
344			AVFILTER_DEFINE_CLASS(astreamselect);
345
346			AVFilter ff_af_astreamselect = {
347			.name = "astreamselect",
348			.description = NULL_IF_CONFIG_SMALL("Select audio streams"),
349			.init = init,
350			.query_formats = query_formats,
351			.process_command = process_command,
352			.uninit = uninit,
353			.activate = activate,
354			.priv_size = sizeof(StreamSelectContext),
355			.priv_class = &astreamselect_class,
356			.flags = AVFILTER_FLAG_DYNAMIC_INPUTS \| AVFILTER_FLAG_DYNAMIC_OUTPUTS,
357			};