aboutsummaryrefslogtreecommitdiffstats
path: root/libavfilter/f_interleave.c
blob: 259952b5912d94f8a706c7179e59a04b899b749e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
/*
 * Copyright (c) 2013 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
 * audio and video interleaver
 */

#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/opt.h"

#include "avfilter.h"
#include "formats.h"
#include "filters.h"
#include "internal.h"
#include "audio.h"
#include "video.h"

typedef struct InterleaveContext {
    const AVClass *class;
    int nb_inputs;
    int duration_mode;
    int64_t pts;
} InterleaveContext;

#define DURATION_LONGEST  0
#define DURATION_SHORTEST 1
#define DURATION_FIRST    2

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

#define DEFINE_OPTIONS(filt_name, flags_)                           \
static const AVOption filt_name##_options[] = {                     \
   { "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
   { "n",         "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
   { "duration", "how to determine the end-of-stream",              \
       OFFSET(duration_mode), AV_OPT_TYPE_INT, { .i64 = DURATION_LONGEST }, 0,  2, flags_, "duration" }, \
       { "longest",  "Duration of longest input",  0, AV_OPT_TYPE_CONST, { .i64 = DURATION_LONGEST  }, 0, 0, flags_, "duration" }, \
       { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, { .i64 = DURATION_SHORTEST }, 0, 0, flags_, "duration" }, \
       { "first",    "Duration of first input",    0, AV_OPT_TYPE_CONST, { .i64 = DURATION_FIRST    }, 0, 0, flags_, "duration" }, \
   { NULL }                                                         \
}

static int activate(AVFilterContext *ctx)
{
    AVFilterLink *outlink = ctx->outputs[0];
    InterleaveContext *s = ctx->priv;
    int64_t q_pts, pts = INT64_MAX;
    int i, nb_eofs = 0, input_idx = -1;
    int first_eof = 0;
    int64_t rpts;
    int status;
    int nb_inputs_with_frames = 0;

    FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx);

    for (i = 0; i < ctx->nb_inputs; i++) {
        int is_eof = !!ff_inlink_acknowledge_status(ctx->inputs[i], &status, &rpts);

        nb_eofs += is_eof;
        if (i == 0)
            first_eof = is_eof;
    }

    if ((nb_eofs > 0 && s->duration_mode == DURATION_SHORTEST) ||
        (nb_eofs == ctx->nb_inputs && s->duration_mode == DURATION_LONGEST) ||
        (first_eof && s->duration_mode == DURATION_FIRST)) {
        ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
        return 0;
    }

    for (i = 0; i < ctx->nb_inputs; i++) {
        if (!ff_inlink_queued_frames(ctx->inputs[i]))
            continue;
        nb_inputs_with_frames++;
    }

    if (nb_inputs_with_frames >= ctx->nb_inputs - nb_eofs) {
        for (i = 0; i < ctx->nb_inputs; i++) {
            AVFrame *frame;

            if (ff_inlink_queued_frames(ctx->inputs[i]) == 0)
                continue;

            frame = ff_inlink_peek_frame(ctx->inputs[i], 0);
            if (frame->pts == AV_NOPTS_VALUE) {
                int ret;

                av_log(ctx, AV_LOG_WARNING,
                       "NOPTS value for input frame cannot be accepted, frame discarded\n");
                ret = ff_inlink_consume_frame(ctx->inputs[i], &frame);
                if (ret < 0)
                    return ret;
                av_frame_free(&frame);
                return AVERROR_INVALIDDATA;
            }

            q_pts = av_rescale_q(frame->pts, ctx->inputs[i]->time_base, AV_TIME_BASE_Q);
            if (q_pts < pts) {
                pts = q_pts;
                input_idx = i;
            }
        }

        if (input_idx >= 0) {
            AVFrame *frame;
            int ret;

            ret = ff_inlink_consume_frame(ctx->inputs[input_idx], &frame);
            if (ret < 0)
                return ret;

            frame->pts = s->pts = pts;
            return ff_filter_frame(outlink, frame);
        }
    }

    for (i = 0; i < ctx->nb_inputs; i++) {
        if (ff_inlink_queued_frames(ctx->inputs[i]))
            continue;
        if (ff_outlink_frame_wanted(outlink) &&
            !ff_outlink_get_status(ctx->inputs[i])) {
            ff_inlink_request_frame(ctx->inputs[i]);
            return 0;
        }
    }

    if (i == ctx->nb_inputs - nb_eofs && ff_outlink_frame_wanted(outlink)) {
        ff_filter_set_ready(ctx, 100);
        return 0;
    }

    return FFERROR_NOT_READY;
}

static av_cold int init(AVFilterContext *ctx)
{
    InterleaveContext *s = ctx->priv;
    const AVFilterPad *outpad = &ctx->filter->outputs[0];
    int i, ret;

    for (i = 0; i < s->nb_inputs; i++) {
        AVFilterPad inpad = { 0 };

        inpad.name = av_asprintf("input%d", i);
        if (!inpad.name)
            return AVERROR(ENOMEM);
        inpad.type         = outpad->type;

        switch (outpad->type) {
        case AVMEDIA_TYPE_VIDEO:
            inpad.get_video_buffer = ff_null_get_video_buffer; break;
        case AVMEDIA_TYPE_AUDIO:
            inpad.get_audio_buffer = ff_null_get_audio_buffer; break;
        default:
            av_assert0(0);
        }
        if ((ret = ff_insert_inpad(ctx, i, &inpad)) < 0) {
            av_freep(&inpad.name);
            return ret;
        }
    }

    return 0;
}

static av_cold void uninit(AVFilterContext *ctx)
{
    for (int i = 0; i < ctx->nb_inputs; i++)
        av_freep(&ctx->input_pads[i].name);
}

static int config_output(AVFilterLink *outlink)
{
    AVFilterContext *ctx = outlink->src;
    AVFilterLink *inlink0 = ctx->inputs[0];
    int i;

    if (outlink->type == AVMEDIA_TYPE_VIDEO) {
        outlink->time_base           = AV_TIME_BASE_Q;
        outlink->w                   = inlink0->w;
        outlink->h                   = inlink0->h;
        outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
        outlink->format              = inlink0->format;
        outlink->frame_rate = (AVRational) {1, 0};
        for (i = 1; i < ctx->nb_inputs; i++) {
            AVFilterLink *inlink = ctx->inputs[i];

            if (outlink->w                       != inlink->w                       ||
                outlink->h                       != inlink->h                       ||
                outlink->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, "Parameters for input link %s "
                       "(size %dx%d, SAR %d:%d) do not match the corresponding "
                       "output link parameters (%dx%d, SAR %d:%d)\n",
                       ctx->input_pads[i].name, inlink->w, inlink->h,
                       inlink->sample_aspect_ratio.num,
                       inlink->sample_aspect_ratio.den,
                       outlink->w, outlink->h,
                       outlink->sample_aspect_ratio.num,
                       outlink->sample_aspect_ratio.den);
                return AVERROR(EINVAL);
            }
        }
    }
    return 0;
}

#if CONFIG_INTERLEAVE_FILTER

DEFINE_OPTIONS(interleave, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
AVFILTER_DEFINE_CLASS(interleave);

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

const AVFilter ff_vf_interleave = {
    .name        = "interleave",
    .description = NULL_IF_CONFIG_SMALL("Temporally interleave video inputs."),
    .priv_size   = sizeof(InterleaveContext),
    .init        = init,
    .uninit      = uninit,
    .activate    = activate,
    .outputs     = interleave_outputs,
    .priv_class  = &interleave_class,
    .flags       = AVFILTER_FLAG_DYNAMIC_INPUTS,
};

#endif

#if CONFIG_AINTERLEAVE_FILTER

DEFINE_OPTIONS(ainterleave, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
AVFILTER_DEFINE_CLASS(ainterleave);

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

const AVFilter ff_af_ainterleave = {
    .name        = "ainterleave",
    .description = NULL_IF_CONFIG_SMALL("Temporally interleave audio inputs."),
    .priv_size   = sizeof(InterleaveContext),
    .init        = init,
    .uninit      = uninit,
    .activate    = activate,
    .outputs     = ainterleave_outputs,
    .priv_class  = &ainterleave_class,
    .flags       = AVFILTER_FLAG_DYNAMIC_INPUTS,
};

#endif