2 * Copyright (c) 2013 Stefano Sabatini
4 * This file is part of FFmpeg.
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.
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. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * audio and video interleaver
26 #include "libavutil/avassert.h"
27 #include "libavutil/avstring.h"
28 #include "libavutil/opt.h"
37 typedef struct InterleaveContext {
43 #define OFFSET(x) offsetof(InterleaveContext, x)
45 #define DEFINE_OPTIONS(filt_name, flags_) \
46 static const AVOption filt_name##_options[] = { \
47 { "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
48 { "n", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
52 static int activate(AVFilterContext *ctx)
54 AVFilterLink *outlink = ctx->outputs[0];
55 InterleaveContext *s = ctx->priv;
56 int64_t q_pts, pts = INT64_MAX;
57 int i, nb_eofs = 0, input_idx = -1;
59 FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx);
61 for (i = 0; i < ctx->nb_inputs; i++) {
62 if (!ff_outlink_get_status(ctx->inputs[i]) &&
63 !ff_inlink_queued_frames(ctx->inputs[i]))
67 if (i == ctx->nb_inputs) {
68 for (i = 0; i < ctx->nb_inputs; i++) {
71 if (ff_outlink_get_status(ctx->inputs[i]))
74 frame = ff_inlink_peek_frame(ctx->inputs[i], 0);
75 if (frame->pts == AV_NOPTS_VALUE) {
78 av_log(ctx, AV_LOG_WARNING,
79 "NOPTS value for input frame cannot be accepted, frame discarded\n");
80 ret = ff_inlink_consume_frame(ctx->inputs[i], &frame);
83 av_frame_free(&frame);
84 return AVERROR_INVALIDDATA;
87 q_pts = av_rescale_q(frame->pts, ctx->inputs[i]->time_base, AV_TIME_BASE_Q);
98 ret = ff_inlink_consume_frame(ctx->inputs[input_idx], &frame);
102 frame->pts = s->pts = pts;
103 return ff_filter_frame(outlink, frame);
107 for (i = 0; i < ctx->nb_inputs; i++) {
108 if (ff_inlink_queued_frames(ctx->inputs[i]))
110 if (ff_outlink_frame_wanted(outlink) &&
111 !ff_outlink_get_status(ctx->inputs[i])) {
112 ff_inlink_request_frame(ctx->inputs[i]);
118 if (nb_eofs == ctx->nb_inputs) {
119 ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
123 return FFERROR_NOT_READY;
126 static av_cold int init(AVFilterContext *ctx)
128 InterleaveContext *s = ctx->priv;
129 const AVFilterPad *outpad = &ctx->filter->outputs[0];
132 for (i = 0; i < s->nb_inputs; i++) {
133 AVFilterPad inpad = { 0 };
135 inpad.name = av_asprintf("input%d", i);
137 return AVERROR(ENOMEM);
138 inpad.type = outpad->type;
140 switch (outpad->type) {
141 case AVMEDIA_TYPE_VIDEO:
142 inpad.get_video_buffer = ff_null_get_video_buffer; break;
143 case AVMEDIA_TYPE_AUDIO:
144 inpad.get_audio_buffer = ff_null_get_audio_buffer; break;
148 if ((ret = ff_insert_inpad(ctx, i, &inpad)) < 0) {
149 av_freep(&inpad.name);
157 static av_cold void uninit(AVFilterContext *ctx)
159 for (int i = 0; i < ctx->nb_inputs; i++)
160 av_freep(&ctx->input_pads[i].name);
163 static int config_output(AVFilterLink *outlink)
165 AVFilterContext *ctx = outlink->src;
166 AVFilterLink *inlink0 = ctx->inputs[0];
169 if (outlink->type == AVMEDIA_TYPE_VIDEO) {
170 outlink->time_base = AV_TIME_BASE_Q;
171 outlink->w = inlink0->w;
172 outlink->h = inlink0->h;
173 outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
174 outlink->format = inlink0->format;
175 outlink->frame_rate = (AVRational) {1, 0};
176 for (i = 1; i < ctx->nb_inputs; i++) {
177 AVFilterLink *inlink = ctx->inputs[i];
179 if (outlink->w != inlink->w ||
180 outlink->h != inlink->h ||
181 outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num ||
182 outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
183 av_log(ctx, AV_LOG_ERROR, "Parameters for input link %s "
184 "(size %dx%d, SAR %d:%d) do not match the corresponding "
185 "output link parameters (%dx%d, SAR %d:%d)\n",
186 ctx->input_pads[i].name, inlink->w, inlink->h,
187 inlink->sample_aspect_ratio.num,
188 inlink->sample_aspect_ratio.den,
189 outlink->w, outlink->h,
190 outlink->sample_aspect_ratio.num,
191 outlink->sample_aspect_ratio.den);
192 return AVERROR(EINVAL);
199 #if CONFIG_INTERLEAVE_FILTER
201 DEFINE_OPTIONS(interleave, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
202 AVFILTER_DEFINE_CLASS(interleave);
204 static const AVFilterPad interleave_outputs[] = {
207 .type = AVMEDIA_TYPE_VIDEO,
208 .config_props = config_output,
213 AVFilter ff_vf_interleave = {
214 .name = "interleave",
215 .description = NULL_IF_CONFIG_SMALL("Temporally interleave video inputs."),
216 .priv_size = sizeof(InterleaveContext),
219 .activate = activate,
220 .outputs = interleave_outputs,
221 .priv_class = &interleave_class,
222 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
227 #if CONFIG_AINTERLEAVE_FILTER
229 DEFINE_OPTIONS(ainterleave, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
230 AVFILTER_DEFINE_CLASS(ainterleave);
232 static const AVFilterPad ainterleave_outputs[] = {
235 .type = AVMEDIA_TYPE_AUDIO,
236 .config_props = config_output,
241 AVFilter ff_af_ainterleave = {
242 .name = "ainterleave",
243 .description = NULL_IF_CONFIG_SMALL("Temporally interleave audio inputs."),
244 .priv_size = sizeof(InterleaveContext),
247 .activate = activate,
248 .outputs = ainterleave_outputs,
249 .priv_class = &ainterleave_class,
250 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,