FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavfilter/avf_concat.c	Lines:	195	222	87.8 %
Date:	2020-08-14 10:39:37	Branches:	98	126	77.8 %


/*
 * Copyright (c) 2012 Nicolas George
 *
 * 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
 * concat audio-video filter
 */

#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "filters.h"
#include "internal.h"
#include "video.h"
#include "audio.h"

#define TYPE_ALL 2

typedef struct ConcatContext {
    const AVClass *class;
    unsigned nb_streams[TYPE_ALL]; /**< number of out streams of each type */
    unsigned nb_segments;
    unsigned cur_idx; /**< index of the first input of current segment */
    int64_t delta_ts; /**< timestamp to add to produce output timestamps */
    unsigned nb_in_active; /**< number of active inputs in current segment */
    unsigned unsafe;
    struct concat_in {
        int64_t pts;
        int64_t nb_frames;
        unsigned eof;
    } *in;
} ConcatContext;

#define OFFSET(x) offsetof(ConcatContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM
#define F AV_OPT_FLAG_FILTERING_PARAM
#define V AV_OPT_FLAG_VIDEO_PARAM

static const AVOption concat_options[] = {
    { "n", "specify the number of segments", OFFSET(nb_segments),
      AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, V|A|F},
    { "v", "specify the number of video streams",
      OFFSET(nb_streams[AVMEDIA_TYPE_VIDEO]),
      AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, V|F },
    { "a", "specify the number of audio streams",
      OFFSET(nb_streams[AVMEDIA_TYPE_AUDIO]),
      AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A|F},
    { "unsafe", "enable unsafe mode",
      OFFSET(unsafe),
      AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, V|A|F},
    { NULL }
};

AVFILTER_DEFINE_CLASS(concat);

static int query_formats(AVFilterContext *ctx)
{
    ConcatContext *cat = ctx->priv;
    unsigned type, nb_str, idx0 = 0, idx, str, seg;
    AVFilterFormats *formats, *rates = NULL;
    AVFilterChannelLayouts *layouts = NULL;
    int ret;

    for (type = 0; type < TYPE_ALL; type++) {
        nb_str = cat->nb_streams[type];
        for (str = 0; str < nb_str; str++) {
            idx = idx0;

            /* Set the output formats */
            formats = ff_all_formats(type);
            if ((ret = ff_formats_ref(formats, &ctx->outputs[idx]->in_formats)) < 0)
                return ret;

            if (type == AVMEDIA_TYPE_AUDIO) {
                rates = ff_all_samplerates();
                if ((ret = ff_formats_ref(rates, &ctx->outputs[idx]->in_samplerates)) < 0)
                    return ret;
                layouts = ff_all_channel_layouts();
                if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[idx]->in_channel_layouts)) < 0)
                    return ret;
            }

            /* Set the same formats for each corresponding input */
            for (seg = 0; seg < cat->nb_segments; seg++) {
                if ((ret = ff_formats_ref(formats, &ctx->inputs[idx]->out_formats)) < 0)
                    return ret;
                if (type == AVMEDIA_TYPE_AUDIO) {
                    if ((ret = ff_formats_ref(rates, &ctx->inputs[idx]->out_samplerates)) < 0 ||
                        (ret = ff_channel_layouts_ref(layouts, &ctx->inputs[idx]->out_channel_layouts)) < 0)
                        return ret;
                }
                idx += ctx->nb_outputs;
            }

            idx0++;
        }
    }
    return 0;
}

static int config_output(AVFilterLink *outlink)
{
    AVFilterContext *ctx = outlink->src;
    ConcatContext *cat   = ctx->priv;
    unsigned out_no = FF_OUTLINK_IDX(outlink);
    unsigned in_no  = out_no, seg;
    AVFilterLink *inlink = ctx->inputs[in_no];

    /* enhancement: find a common one */
    outlink->time_base           = AV_TIME_BASE_Q;
    outlink->w                   = inlink->w;
    outlink->h                   = inlink->h;
    outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
    outlink->format              = inlink->format;
    outlink->frame_rate          = inlink->frame_rate;

    for (seg = 1; seg < cat->nb_segments; seg++) {
        inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
        if (outlink->frame_rate.num != inlink->frame_rate.num ||
            outlink->frame_rate.den != inlink->frame_rate.den) {
            av_log(ctx, AV_LOG_VERBOSE,
                    "Video inputs have different frame rates, output will be VFR\n");
            outlink->frame_rate = av_make_q(1, 0);
            break;
        }
    }

    for (seg = 1; seg < cat->nb_segments; seg++) {
        inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
        if (!outlink->sample_aspect_ratio.num)
            outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
        /* possible enhancement: unsafe mode, do not check */
        if (outlink->w                       != inlink->w                       ||
            outlink->h                       != inlink->h                       ||
            outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num &&
                                                inlink->sample_aspect_ratio.num ||
            outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
            av_log(ctx, AV_LOG_ERROR, "Input link %s parameters "
                   "(size %dx%d, SAR %d:%d) do not match the corresponding "
                   "output link %s parameters (%dx%d, SAR %d:%d)\n",
                   ctx->input_pads[in_no].name, inlink->w, inlink->h,
                   inlink->sample_aspect_ratio.num,
                   inlink->sample_aspect_ratio.den,
                   ctx->input_pads[out_no].name, outlink->w, outlink->h,
                   outlink->sample_aspect_ratio.num,
                   outlink->sample_aspect_ratio.den);
            if (!cat->unsafe)
                return AVERROR(EINVAL);
        }
    }

    return 0;
}

static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
{
    ConcatContext *cat = ctx->priv;
    unsigned out_no = in_no % ctx->nb_outputs;
    AVFilterLink * inlink = ctx-> inputs[ in_no];
    AVFilterLink *outlink = ctx->outputs[out_no];
    struct concat_in *in = &cat->in[in_no];

    buf->pts = av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
    in->pts = buf->pts;
    in->nb_frames++;
    /* add duration to input PTS */
    if (inlink->sample_rate)
        /* use number of audio samples */
        in->pts += av_rescale_q(buf->nb_samples,
                                av_make_q(1, inlink->sample_rate),
                                outlink->time_base);
    else if (in->nb_frames >= 2)
        /* use mean duration */
        in->pts = av_rescale(in->pts, in->nb_frames, in->nb_frames - 1);

    buf->pts += cat->delta_ts;
    return ff_filter_frame(outlink, buf);
}

static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
{
    AVFilterContext *ctx = inlink->dst;
    unsigned in_no = FF_INLINK_IDX(inlink);
    AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];

    return ff_get_video_buffer(outlink, w, h);
}

static AVFrame *get_audio_buffer(AVFilterLink *inlink, int nb_samples)
{
    AVFilterContext *ctx = inlink->dst;
    unsigned in_no = FF_INLINK_IDX(inlink);
    AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];

    return ff_get_audio_buffer(outlink, nb_samples);
}

static void close_input(AVFilterContext *ctx, unsigned in_no)
{
    ConcatContext *cat = ctx->priv;

    cat->in[in_no].eof = 1;
    cat->nb_in_active--;
    av_log(ctx, AV_LOG_VERBOSE, "EOF on %s, %d streams left in segment.\n",
           ctx->input_pads[in_no].name, cat->nb_in_active);
}

static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
{
    ConcatContext *cat = ctx->priv;
    unsigned i = cat->cur_idx;
    unsigned imax = i + ctx->nb_outputs;
    int64_t pts;

    pts = cat->in[i++].pts;
    for (; i < imax; i++)
        pts = FFMAX(pts, cat->in[i].pts);
    cat->delta_ts += pts;
    *seg_delta = pts;
}

static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no,
                        int64_t seg_delta)
{
    ConcatContext *cat = ctx->priv;
    AVFilterLink *outlink = ctx->outputs[out_no];
    int64_t base_pts = cat->in[in_no].pts + cat->delta_ts - seg_delta;
    int64_t nb_samples, sent = 0;
    int frame_nb_samples, ret;
    AVRational rate_tb = { 1, ctx->inputs[in_no]->sample_rate };
    AVFrame *buf;

    if (!rate_tb.den)
        return AVERROR_BUG;
    nb_samples = av_rescale_q(seg_delta - cat->in[in_no].pts,
                              outlink->time_base, rate_tb);
    frame_nb_samples = FFMAX(9600, rate_tb.den / 5); /* arbitrary */
    while (nb_samples) {
        frame_nb_samples = FFMIN(frame_nb_samples, nb_samples);
        buf = ff_get_audio_buffer(outlink, frame_nb_samples);
        if (!buf)
            return AVERROR(ENOMEM);
        av_samples_set_silence(buf->extended_data, 0, frame_nb_samples,
                               outlink->channels, outlink->format);
        buf->pts = base_pts + av_rescale_q(sent, rate_tb, outlink->time_base);
        ret = ff_filter_frame(outlink, buf);
        if (ret < 0)
            return ret;
        sent       += frame_nb_samples;
        nb_samples -= frame_nb_samples;
    }
    return 0;
}

static int flush_segment(AVFilterContext *ctx)
{
    int ret;
    ConcatContext *cat = ctx->priv;
    unsigned str, str_max;
    int64_t seg_delta;

    find_next_delta_ts(ctx, &seg_delta);
    cat->cur_idx += ctx->nb_outputs;
    cat->nb_in_active = ctx->nb_outputs;
    av_log(ctx, AV_LOG_VERBOSE, "Segment finished at pts=%"PRId64"\n",
           cat->delta_ts);

    if (cat->cur_idx < ctx->nb_inputs) {
        /* pad audio streams with silence */
        str = cat->nb_streams[AVMEDIA_TYPE_VIDEO];
        str_max = str + cat->nb_streams[AVMEDIA_TYPE_AUDIO];
        for (; str < str_max; str++) {
            ret = send_silence(ctx, cat->cur_idx - ctx->nb_outputs + str, str,
                               seg_delta);
            if (ret < 0)
                return ret;
        }
    }
    return 0;
}

static av_cold int init(AVFilterContext *ctx)
{
    ConcatContext *cat = ctx->priv;
    unsigned seg, type, str;
    int ret;

    /* create input pads */
    for (seg = 0; seg < cat->nb_segments; seg++) {
        for (type = 0; type < TYPE_ALL; type++) {
            for (str = 0; str < cat->nb_streams[type]; str++) {
                AVFilterPad pad = {
                    .type             = type,
                    .get_video_buffer = get_video_buffer,
                    .get_audio_buffer = get_audio_buffer,
                };
                pad.name = av_asprintf("in%d:%c%d", seg, "va"[type], str);
                if ((ret = ff_insert_inpad(ctx, ctx->nb_inputs, &pad)) < 0) {
                    av_freep(&pad.name);
                    return ret;
                }
            }
        }
    }
    /* create output pads */
    for (type = 0; type < TYPE_ALL; type++) {
        for (str = 0; str < cat->nb_streams[type]; str++) {
            AVFilterPad pad = {
                .type          = type,
                .config_props  = config_output,
            };
            pad.name = av_asprintf("out:%c%d", "va"[type], str);
            if ((ret = ff_insert_outpad(ctx, ctx->nb_outputs, &pad)) < 0) {
                av_freep(&pad.name);
                return ret;
            }
        }
    }

    cat->in = av_calloc(ctx->nb_inputs, sizeof(*cat->in));
    if (!cat->in)
        return AVERROR(ENOMEM);
    cat->nb_in_active = ctx->nb_outputs;
    return 0;
}

static av_cold void uninit(AVFilterContext *ctx)
{
    ConcatContext *cat = ctx->priv;
    unsigned i;

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

static int activate(AVFilterContext *ctx)
{
    ConcatContext *cat = ctx->priv;
    AVFrame *frame;
    unsigned i, j;
    int ret, status;
    int64_t pts;

    /* Forward status back */
    for (i = 0; i < ctx->nb_outputs; i++) {
        status = ff_outlink_get_status(ctx->outputs[i]);
        if (!status)
            continue;
        for (j = i; j < ctx->nb_inputs; j += ctx->nb_outputs) {
            if (!cat->in[j].eof) {
                cat->in[j].eof = 1;
                ff_inlink_set_status(ctx->inputs[j], status);
                return 0;
            }
        }

    }

    /* Forward available frames */
    if (cat->cur_idx < ctx->nb_inputs) {
        for (i = 0; i < ctx->nb_outputs; i++) {
            ret = ff_inlink_consume_frame(ctx->inputs[cat->cur_idx + i], &frame);
            if (ret < 0)
                return ret;
            if (ret) {
                ff_filter_set_ready(ctx, 10);
                return push_frame(ctx, cat->cur_idx + i, frame);
            }
        }
    }

    /* Forward status change */
    if (cat->cur_idx < ctx->nb_inputs) {
        for (i = 0; i < ctx->nb_outputs; i++) {
            ret = ff_inlink_acknowledge_status(ctx->inputs[cat->cur_idx + i], &status, &pts);
            /* TODO use pts */
            if (ret > 0) {
                close_input(ctx, cat->cur_idx + i);
                if (cat->cur_idx + ctx->nb_outputs >= ctx->nb_inputs) {
                    ff_outlink_set_status(ctx->outputs[i], status, pts);
                }
                if (!cat->nb_in_active) {
                    ret = flush_segment(ctx);
                    if (ret < 0)
                        return ret;
                }
                ff_filter_set_ready(ctx, 10);
                return 0;
            }
        }
    }

    ret = FFERROR_NOT_READY;
    for (i = 0; i < ctx->nb_outputs; i++) {
        if (ff_outlink_frame_wanted(ctx->outputs[i])) {
            if (cat->in[cat->cur_idx + i].eof) {
                for (j = 0; j < ctx->nb_outputs; j++)
                    if (!cat->in[cat->cur_idx + j].eof)
                        ff_inlink_request_frame(ctx->inputs[cat->cur_idx + j]);
                return 0;
            } else {
                ff_inlink_request_frame(ctx->inputs[cat->cur_idx + i]);
                ret = 0;
            }
        }
    }

    return ret;
}

static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
                           char *res, int res_len, int flags)
{
    int ret = AVERROR(ENOSYS);

    if (!strcmp(cmd, "next")) {
        av_log(ctx, AV_LOG_VERBOSE, "Command received: next\n");
        return flush_segment(ctx);
    }

    return ret;
}

AVFilter ff_avf_concat = {
    .name          = "concat",
    .description   = NULL_IF_CONFIG_SMALL("Concatenate audio and video streams."),
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .activate      = activate,
    .priv_size     = sizeof(ConcatContext),
    .inputs        = NULL,
    .outputs       = NULL,
    .priv_class    = &concat_class,
    .flags         = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
    .process_command = process_command,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2012 Nicolas George
3			*
4			* This file is part of FFmpeg.
5			*
6			* FFmpeg is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10			*
11			* FFmpeg is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14			* See the GNU Lesser General Public License for more details.
15			*
16			* You should have received a copy of the GNU Lesser General Public License
17			* along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18			* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19			*/
20
21			/**
22			* @file
23			* concat audio-video filter
24			*/
25
26			#include "libavutil/avassert.h"
27			#include "libavutil/avstring.h"
28			#include "libavutil/channel_layout.h"
29			#include "libavutil/opt.h"
30			#include "avfilter.h"
31			#include "filters.h"
32			#include "internal.h"
33			#include "video.h"
34			#include "audio.h"
35
36			#define TYPE_ALL 2
37
38			typedef struct ConcatContext {
39			const AVClass *class;
40			unsigned nb_streams[TYPE_ALL]; /*< number of out streams of each type /
41			unsigned nb_segments;
42			unsigned cur_idx; /*< index of the first input of current segment /
43			int64_t delta_ts; /*< timestamp to add to produce output timestamps /
44			unsigned nb_in_active; /*< number of active inputs in current segment /
45			unsigned unsafe;
46			struct concat_in {
47			int64_t pts;
48			int64_t nb_frames;
49			unsigned eof;
50			} *in;
51			} ConcatContext;
52
53			#define OFFSET(x) offsetof(ConcatContext, x)
54			#define A AV_OPT_FLAG_AUDIO_PARAM
55			#define F AV_OPT_FLAG_FILTERING_PARAM
56			#define V AV_OPT_FLAG_VIDEO_PARAM
57
58			static const AVOption concat_options[] = {
59			{ "n", "specify the number of segments", OFFSET(nb_segments),
60			AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, V\|A\|F},
61			{ "v", "specify the number of video streams",
62			OFFSET(nb_streams[AVMEDIA_TYPE_VIDEO]),
63			AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, V\|F },
64			{ "a", "specify the number of audio streams",
65			OFFSET(nb_streams[AVMEDIA_TYPE_AUDIO]),
66			AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A\|F},
67			{ "unsafe", "enable unsafe mode",
68			OFFSET(unsafe),
69			AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, V\|A\|F},
70			{ NULL }
71			};
72
73			AVFILTER_DEFINE_CLASS(concat);
74
75		3	static int query_formats(AVFilterContext *ctx)
76			{
77		3	ConcatContext *cat = ctx->priv;
78		3	unsigned type, nb_str, idx0 = 0, idx, str, seg;
79		3	AVFilterFormats formats, rates = NULL;
80		3	AVFilterChannelLayouts *layouts = NULL;
81			int ret;
82
83	✓✓	9	for (type = 0; type < TYPE_ALL; type++) {
84		6	nb_str = cat->nb_streams[type];
85	✓✓	11	for (str = 0; str < nb_str; str++) {
86		5	idx = idx0;
87
88			/* Set the output formats */
89		5	formats = ff_all_formats(type);
90	✗✓	5	if ((ret = ff_formats_ref(formats, &ctx->outputs[idx]->in_formats)) < 0)
91			return ret;
92
93	✓✓	5	if (type == AVMEDIA_TYPE_AUDIO) {
94		2	rates = ff_all_samplerates();
95	✗✓	2	if ((ret = ff_formats_ref(rates, &ctx->outputs[idx]->in_samplerates)) < 0)
96			return ret;
97		2	layouts = ff_all_channel_layouts();
98	✗✓	2	if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[idx]->in_channel_layouts)) < 0)
99			return ret;
100			}
101
102			/* Set the same formats for each corresponding input */
103	✓✓	19	for (seg = 0; seg < cat->nb_segments; seg++) {
104	✗✓	14	if ((ret = ff_formats_ref(formats, &ctx->inputs[idx]->out_formats)) < 0)
105			return ret;
106	✓✓	14	if (type == AVMEDIA_TYPE_AUDIO) {
107	✓✗✗✓	12	if ((ret = ff_formats_ref(rates, &ctx->inputs[idx]->out_samplerates)) < 0 \|\|
108		6	(ret = ff_channel_layouts_ref(layouts, &ctx->inputs[idx]->out_channel_layouts)) < 0)
109			return ret;
110			}
111		14	idx += ctx->nb_outputs;
112			}
113
114		5	idx0++;
115			}
116			}
117		3	return 0;
118			}
119
120		5	static int config_output(AVFilterLink *outlink)
121			{
122		5	AVFilterContext *ctx = outlink->src;
123		5	ConcatContext *cat = ctx->priv;
124		5	unsigned out_no = FF_OUTLINK_IDX(outlink);
125		5	unsigned in_no = out_no, seg;
126		5	AVFilterLink *inlink = ctx->inputs[in_no];
127
128			/* enhancement: find a common one */
129		5	outlink->time_base = AV_TIME_BASE_Q;
130		5	outlink->w = inlink->w;
131		5	outlink->h = inlink->h;
132		5	outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
133		5	outlink->format = inlink->format;
134		5	outlink->frame_rate = inlink->frame_rate;
135
136	✓✓	12	for (seg = 1; seg < cat->nb_segments; seg++) {
137		8	inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
138	✓✓	8	if (outlink->frame_rate.num != inlink->frame_rate.num \|\|
139	✗✓	7	outlink->frame_rate.den != inlink->frame_rate.den) {
140		1	av_log(ctx, AV_LOG_VERBOSE,
141			"Video inputs have different frame rates, output will be VFR\n");
142		1	outlink->frame_rate = av_make_q(1, 0);
143		1	break;
144			}
145			}
146
147	✓✓	14	for (seg = 1; seg < cat->nb_segments; seg++) {
148		9	inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
149	✓✓	9	if (!outlink->sample_aspect_ratio.num)
150		4	outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
151			/* possible enhancement: unsafe mode, do not check */
152	✓✓	9	if (outlink->w != inlink->w \|\|
153	✓✗	8	outlink->h != inlink->h \|\|
154	✗✓	8	outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num &&
155			inlink->sample_aspect_ratio.num \|\|
156	✗✓	8	outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
157		1	av_log(ctx, AV_LOG_ERROR, "Input link %s parameters "
158			"(size %dx%d, SAR %d:%d) do not match the corresponding "
159			"output link %s parameters (%dx%d, SAR %d:%d)\n",
160		1	ctx->input_pads[in_no].name, inlink->w, inlink->h,
161			inlink->sample_aspect_ratio.num,
162			inlink->sample_aspect_ratio.den,
163		1	ctx->input_pads[out_no].name, outlink->w, outlink->h,
164			outlink->sample_aspect_ratio.num,
165			outlink->sample_aspect_ratio.den);
166	✗✓	1	if (!cat->unsafe)
167			return AVERROR(EINVAL);
168			}
169			}
170
171		5	return 0;
172			}
173
174		413	static int push_frame(AVFilterContext ctx, unsigned in_no, AVFrame buf)
175			{
176		413	ConcatContext *cat = ctx->priv;
177		413	unsigned out_no = in_no % ctx->nb_outputs;
178		413	AVFilterLink * inlink = ctx-> inputs[ in_no];
179		413	AVFilterLink *outlink = ctx->outputs[out_no];
180		413	struct concat_in *in = &cat->in[in_no];
181
182		413	buf->pts = av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
183		413	in->pts = buf->pts;
184		413	in->nb_frames++;
185			/* add duration to input PTS */
186	✓✓	413	if (inlink->sample_rate)
187			/* use number of audio samples */
188		350	in->pts += av_rescale_q(buf->nb_samples,
189			av_make_q(1, inlink->sample_rate),
190			outlink->time_base);
191	✓✓	63	else if (in->nb_frames >= 2)
192			/* use mean duration */
193		55	in->pts = av_rescale(in->pts, in->nb_frames, in->nb_frames - 1);
194
195		413	buf->pts += cat->delta_ts;
196		413	return ff_filter_frame(outlink, buf);
197			}
198
199		63	static AVFrame get_video_buffer(AVFilterLink inlink, int w, int h)
200			{
201		63	AVFilterContext *ctx = inlink->dst;
202		63	unsigned in_no = FF_INLINK_IDX(inlink);
203		63	AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
204
205		63	return ff_get_video_buffer(outlink, w, h);
206			}
207
208		350	static AVFrame get_audio_buffer(AVFilterLink inlink, int nb_samples)
209			{
210		350	AVFilterContext *ctx = inlink->dst;
211		350	unsigned in_no = FF_INLINK_IDX(inlink);
212		350	AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
213
214		350	return ff_get_audio_buffer(outlink, nb_samples);
215			}
216
217		14	static void close_input(AVFilterContext *ctx, unsigned in_no)
218			{
219		14	ConcatContext *cat = ctx->priv;
220
221		14	cat->in[in_no].eof = 1;
222		14	cat->nb_in_active--;
223		14	av_log(ctx, AV_LOG_VERBOSE, "EOF on %s, %d streams left in segment.\n",
224		14	ctx->input_pads[in_no].name, cat->nb_in_active);
225		14	}
226
227		8	static void find_next_delta_ts(AVFilterContext ctx, int64_t seg_delta)
228			{
229		8	ConcatContext *cat = ctx->priv;
230		8	unsigned i = cat->cur_idx;
231		8	unsigned imax = i + ctx->nb_outputs;
232			int64_t pts;
233
234		8	pts = cat->in[i++].pts;
235	✓✓	14	for (; i < imax; i++)
236		6	pts = FFMAX(pts, cat->in[i].pts);
237		8	cat->delta_ts += pts;
238		8	*seg_delta = pts;
239		8	}
240
241		4	static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no,
242			int64_t seg_delta)
243			{
244		4	ConcatContext *cat = ctx->priv;
245		4	AVFilterLink *outlink = ctx->outputs[out_no];
246		4	int64_t base_pts = cat->in[in_no].pts + cat->delta_ts - seg_delta;
247		4	int64_t nb_samples, sent = 0;
248			int frame_nb_samples, ret;
249		4	AVRational rate_tb = { 1, ctx->inputs[in_no]->sample_rate };
250			AVFrame *buf;
251
252	✗✓	4	if (!rate_tb.den)
253			return AVERROR_BUG;
254		4	nb_samples = av_rescale_q(seg_delta - cat->in[in_no].pts,
255			outlink->time_base, rate_tb);
256	✗✓	4	frame_nb_samples = FFMAX(9600, rate_tb.den / 5); /* arbitrary */
257	✓✓	14	while (nb_samples) {
258		10	frame_nb_samples = FFMIN(frame_nb_samples, nb_samples);
259		10	buf = ff_get_audio_buffer(outlink, frame_nb_samples);
260	✗✓	10	if (!buf)
261			return AVERROR(ENOMEM);
262		10	av_samples_set_silence(buf->extended_data, 0, frame_nb_samples,
263		10	outlink->channels, outlink->format);
264		10	buf->pts = base_pts + av_rescale_q(sent, rate_tb, outlink->time_base);
265		10	ret = ff_filter_frame(outlink, buf);
266	✗✓	10	if (ret < 0)
267			return ret;
268		10	sent += frame_nb_samples;
269		10	nb_samples -= frame_nb_samples;
270			}
271		4	return 0;
272			}
273
274		8	static int flush_segment(AVFilterContext *ctx)
275			{
276			int ret;
277		8	ConcatContext *cat = ctx->priv;
278			unsigned str, str_max;
279			int64_t seg_delta;
280
281		8	find_next_delta_ts(ctx, &seg_delta);
282		8	cat->cur_idx += ctx->nb_outputs;
283		8	cat->nb_in_active = ctx->nb_outputs;
284		8	av_log(ctx, AV_LOG_VERBOSE, "Segment finished at pts=%"PRId64"\n",
285			cat->delta_ts);
286
287	✓✓	8	if (cat->cur_idx < ctx->nb_inputs) {
288			/* pad audio streams with silence */
289		5	str = cat->nb_streams[AVMEDIA_TYPE_VIDEO];
290		5	str_max = str + cat->nb_streams[AVMEDIA_TYPE_AUDIO];
291	✓✓	9	for (; str < str_max; str++) {
292		4	ret = send_silence(ctx, cat->cur_idx - ctx->nb_outputs + str, str,
293			seg_delta);
294	✗✓	4	if (ret < 0)
295			return ret;
296			}
297			}
298		8	return 0;
299			}
300
301		5	static av_cold int init(AVFilterContext *ctx)
302			{
303		5	ConcatContext *cat = ctx->priv;
304			unsigned seg, type, str;
305			int ret;
306
307			/* create input pads */
308	✓✓	19	for (seg = 0; seg < cat->nb_segments; seg++) {
309	✓✓	42	for (type = 0; type < TYPE_ALL; type++) {
310	✓✓	54	for (str = 0; str < cat->nb_streams[type]; str++) {
311		26	AVFilterPad pad = {
312			.type = type,
313			.get_video_buffer = get_video_buffer,
314			.get_audio_buffer = get_audio_buffer,
315			};
316		26	pad.name = av_asprintf("in%d:%c%d", seg, "va"[type], str);
317	✗✓	26	if ((ret = ff_insert_inpad(ctx, ctx->nb_inputs, &pad)) < 0) {
318			av_freep(&pad.name);
319			return ret;
320			}
321			}
322			}
323			}
324			/* create output pads */
325	✓✓	15	for (type = 0; type < TYPE_ALL; type++) {
326	✓✓	19	for (str = 0; str < cat->nb_streams[type]; str++) {
327		9	AVFilterPad pad = {
328			.type = type,
329			.config_props = config_output,
330			};
331		9	pad.name = av_asprintf("out:%c%d", "va"[type], str);
332	✗✓	9	if ((ret = ff_insert_outpad(ctx, ctx->nb_outputs, &pad)) < 0) {
333			av_freep(&pad.name);
334			return ret;
335			}
336			}
337			}
338
339		5	cat->in = av_calloc(ctx->nb_inputs, sizeof(*cat->in));
340	✗✓	5	if (!cat->in)
341			return AVERROR(ENOMEM);
342		5	cat->nb_in_active = ctx->nb_outputs;
343		5	return 0;
344			}
345
346		5	static av_cold void uninit(AVFilterContext *ctx)
347			{
348		5	ConcatContext *cat = ctx->priv;
349			unsigned i;
350
351	✓✓	31	for (i = 0; i < ctx->nb_inputs; i++)
352		26	av_freep(&ctx->input_pads[i].name);
353	✓✓	14	for (i = 0; i < ctx->nb_outputs; i++)
354		9	av_freep(&ctx->output_pads[i].name);
355		5	av_freep(&cat->in);
356		5	}
357
358		854	static int activate(AVFilterContext *ctx)
359			{
360		854	ConcatContext *cat = ctx->priv;
361			AVFrame *frame;
362			unsigned i, j;
363			int ret, status;
364			int64_t pts;
365
366			/* Forward status back */
367	✓✓	2538	for (i = 0; i < ctx->nb_outputs; i++) {
368		1684	status = ff_outlink_get_status(ctx->outputs[i]);
369	✓✓	1684	if (!status)
370		1654	continue;
371	✓✓	120	for (j = i; j < ctx->nb_inputs; j += ctx->nb_outputs) {
372	✗✓	90	if (!cat->in[j].eof) {
373			cat->in[j].eof = 1;
374			ff_inlink_set_status(ctx->inputs[j], status);
375			return 0;
376			}
377			}
378
379			}
380
381			/* Forward available frames */
382	✓✗	854	if (cat->cur_idx < ctx->nb_inputs) {
383	✓✓	2072	for (i = 0; i < ctx->nb_outputs; i++) {
384		1631	ret = ff_inlink_consume_frame(ctx->inputs[cat->cur_idx + i], &frame);
385	✗✓	1631	if (ret < 0)
386			return ret;
387	✓✓	1631	if (ret) {
388		413	ff_filter_set_ready(ctx, 10);
389		413	return push_frame(ctx, cat->cur_idx + i, frame);
390			}
391			}
392			}
393
394			/* Forward status change */
395	✓✗	441	if (cat->cur_idx < ctx->nb_inputs) {
396	✓✓	1289	for (i = 0; i < ctx->nb_outputs; i++) {
397		862	ret = ff_inlink_acknowledge_status(ctx->inputs[cat->cur_idx + i], &status, &pts);
398			/* TODO use pts */
399	✓✓	862	if (ret > 0) {
400		14	close_input(ctx, cat->cur_idx + i);
401	✓✓	14	if (cat->cur_idx + ctx->nb_outputs >= ctx->nb_inputs) {
402		5	ff_outlink_set_status(ctx->outputs[i], status, pts);
403			}
404	✓✓	14	if (!cat->nb_in_active) {
405		8	ret = flush_segment(ctx);
406	✗✓	8	if (ret < 0)
407			return ret;
408			}
409		14	ff_filter_set_ready(ctx, 10);
410		14	return 0;
411			}
412			}
413			}
414
415		427	ret = FFERROR_NOT_READY;
416	✓✓	1063	for (i = 0; i < ctx->nb_outputs; i++) {
417	✓✓	744	if (ff_outlink_frame_wanted(ctx->outputs[i])) {
418	✓✓	427	if (cat->in[cat->cur_idx + i].eof) {
419	✓✓	324	for (j = 0; j < ctx->nb_outputs; j++)
420	✓✓	216	if (!cat->in[cat->cur_idx + j].eof)
421		108	ff_inlink_request_frame(ctx->inputs[cat->cur_idx + j]);
422		108	return 0;
423			} else {
424		319	ff_inlink_request_frame(ctx->inputs[cat->cur_idx + i]);
425		319	ret = 0;
426			}
427			}
428			}
429
430		319	return ret;
431			}
432
433			static int process_command(AVFilterContext ctx, const char cmd, const char *args,
434			char *res, int res_len, int flags)
435			{
436			int ret = AVERROR(ENOSYS);
437
438			if (!strcmp(cmd, "next")) {
439			av_log(ctx, AV_LOG_VERBOSE, "Command received: next\n");
440			return flush_segment(ctx);
441			}
442
443			return ret;
444			}
445
446			AVFilter ff_avf_concat = {
447			.name = "concat",
448			.description = NULL_IF_CONFIG_SMALL("Concatenate audio and video streams."),
449			.init = init,
450			.uninit = uninit,
451			.query_formats = query_formats,
452			.activate = activate,
453			.priv_size = sizeof(ConcatContext),
454			.inputs = NULL,
455			.outputs = NULL,
456			.priv_class = &concat_class,
457			.flags = AVFILTER_FLAG_DYNAMIC_INPUTS \| AVFILTER_FLAG_DYNAMIC_OUTPUTS,
458			.process_command = process_command,
459			};