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path: root/libavfilter/f_interleave.c (plain)
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1/*
2 * Copyright (c) 2013 Stefano Sabatini
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. See the GNU
14 * Lesser General Public License for more details.
15 *
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
19 */
20
21/**
22 * @file
23 * audio and video interleaver
24 */
25
26#include "libavutil/avassert.h"
27#include "libavutil/avstring.h"
28#include "libavutil/opt.h"
29
30#define FF_INTERNAL_FIELDS 1
31#include "framequeue.h"
32
33#include "avfilter.h"
34#include "bufferqueue.h"
35#include "formats.h"
36#include "internal.h"
37#include "audio.h"
38#include "video.h"
39
40typedef struct {
41 const AVClass *class;
42 int nb_inputs;
43 struct FFBufQueue *queues;
44} InterleaveContext;
45
46#define OFFSET(x) offsetof(InterleaveContext, x)
47
48#define DEFINE_OPTIONS(filt_name, flags_) \
49static const AVOption filt_name##_options[] = { \
50 { "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
51 { "n", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
52 { NULL } \
53}
54
55inline static int push_frame(AVFilterContext *ctx)
56{
57 InterleaveContext *s = ctx->priv;
58 AVFrame *frame;
59 int i, queue_idx = -1;
60 int64_t pts_min = INT64_MAX;
61
62 /* look for oldest frame */
63 for (i = 0; i < ctx->nb_inputs; i++) {
64 struct FFBufQueue *q = &s->queues[i];
65
66 if (!q->available && !ctx->inputs[i]->status_out)
67 return 0;
68 if (q->available) {
69 frame = ff_bufqueue_peek(q, 0);
70 if (frame->pts < pts_min) {
71 pts_min = frame->pts;
72 queue_idx = i;
73 }
74 }
75 }
76
77 /* all inputs are closed */
78 if (queue_idx < 0)
79 return AVERROR_EOF;
80
81 frame = ff_bufqueue_get(&s->queues[queue_idx]);
82 av_log(ctx, AV_LOG_DEBUG, "queue:%d -> frame time:%f\n",
83 queue_idx, frame->pts * av_q2d(AV_TIME_BASE_Q));
84 return ff_filter_frame(ctx->outputs[0], frame);
85}
86
87static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
88{
89 AVFilterContext *ctx = inlink->dst;
90 InterleaveContext *s = ctx->priv;
91 unsigned in_no = FF_INLINK_IDX(inlink);
92
93 if (frame->pts == AV_NOPTS_VALUE) {
94 av_log(ctx, AV_LOG_WARNING,
95 "NOPTS value for input frame cannot be accepted, frame discarded\n");
96 av_frame_free(&frame);
97 return AVERROR_INVALIDDATA;
98 }
99
100 /* queue frame */
101 frame->pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
102 av_log(ctx, AV_LOG_DEBUG, "frame pts:%f -> queue idx:%d available:%d\n",
103 frame->pts * av_q2d(AV_TIME_BASE_Q), in_no, s->queues[in_no].available);
104 ff_bufqueue_add(ctx, &s->queues[in_no], frame);
105
106 return push_frame(ctx);
107}
108
109static av_cold int init(AVFilterContext *ctx)
110{
111 InterleaveContext *s = ctx->priv;
112 const AVFilterPad *outpad = &ctx->filter->outputs[0];
113 int i;
114
115 s->queues = av_calloc(s->nb_inputs, sizeof(s->queues[0]));
116 if (!s->queues)
117 return AVERROR(ENOMEM);
118
119 for (i = 0; i < s->nb_inputs; i++) {
120 AVFilterPad inpad = { 0 };
121
122 inpad.name = av_asprintf("input%d", i);
123 if (!inpad.name)
124 return AVERROR(ENOMEM);
125 inpad.type = outpad->type;
126 inpad.filter_frame = filter_frame;
127
128 switch (outpad->type) {
129 case AVMEDIA_TYPE_VIDEO:
130 inpad.get_video_buffer = ff_null_get_video_buffer; break;
131 case AVMEDIA_TYPE_AUDIO:
132 inpad.get_audio_buffer = ff_null_get_audio_buffer; break;
133 default:
134 av_assert0(0);
135 }
136 ff_insert_inpad(ctx, i, &inpad);
137 }
138
139 return 0;
140}
141
142static av_cold void uninit(AVFilterContext *ctx)
143{
144 InterleaveContext *s = ctx->priv;
145 int i;
146
147 for (i = 0; i < ctx->nb_inputs; i++) {
148 ff_bufqueue_discard_all(&s->queues[i]);
149 av_freep(&s->queues[i]);
150 av_freep(&ctx->input_pads[i].name);
151 }
152}
153
154static int config_output(AVFilterLink *outlink)
155{
156 AVFilterContext *ctx = outlink->src;
157 AVFilterLink *inlink0 = ctx->inputs[0];
158 int i;
159
160 if (outlink->type == AVMEDIA_TYPE_VIDEO) {
161 outlink->time_base = AV_TIME_BASE_Q;
162 outlink->w = inlink0->w;
163 outlink->h = inlink0->h;
164 outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
165 outlink->format = inlink0->format;
166 outlink->frame_rate = (AVRational) {1, 0};
167 for (i = 1; i < ctx->nb_inputs; i++) {
168 AVFilterLink *inlink = ctx->inputs[i];
169
170 if (outlink->w != inlink->w ||
171 outlink->h != inlink->h ||
172 outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num ||
173 outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
174 av_log(ctx, AV_LOG_ERROR, "Parameters for input link %s "
175 "(size %dx%d, SAR %d:%d) do not match the corresponding "
176 "output link parameters (%dx%d, SAR %d:%d)\n",
177 ctx->input_pads[i].name, inlink->w, inlink->h,
178 inlink->sample_aspect_ratio.num,
179 inlink->sample_aspect_ratio.den,
180 outlink->w, outlink->h,
181 outlink->sample_aspect_ratio.num,
182 outlink->sample_aspect_ratio.den);
183 return AVERROR(EINVAL);
184 }
185 }
186 }
187 return 0;
188}
189
190static int request_frame(AVFilterLink *outlink)
191{
192 AVFilterContext *ctx = outlink->src;
193 InterleaveContext *s = ctx->priv;
194 int i, ret;
195
196 for (i = 0; i < ctx->nb_inputs; i++) {
197 if (!s->queues[i].available && !ctx->inputs[i]->status_out) {
198 ret = ff_request_frame(ctx->inputs[i]);
199 if (ret != AVERROR_EOF)
200 return ret;
201 }
202 }
203
204 return push_frame(ctx);
205}
206
207#if CONFIG_INTERLEAVE_FILTER
208
209DEFINE_OPTIONS(interleave, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
210AVFILTER_DEFINE_CLASS(interleave);
211
212static const AVFilterPad interleave_outputs[] = {
213 {
214 .name = "default",
215 .type = AVMEDIA_TYPE_VIDEO,
216 .config_props = config_output,
217 .request_frame = request_frame,
218 },
219 { NULL }
220};
221
222AVFilter ff_vf_interleave = {
223 .name = "interleave",
224 .description = NULL_IF_CONFIG_SMALL("Temporally interleave video inputs."),
225 .priv_size = sizeof(InterleaveContext),
226 .init = init,
227 .uninit = uninit,
228 .outputs = interleave_outputs,
229 .priv_class = &interleave_class,
230 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
231};
232
233#endif
234
235#if CONFIG_AINTERLEAVE_FILTER
236
237DEFINE_OPTIONS(ainterleave, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
238AVFILTER_DEFINE_CLASS(ainterleave);
239
240static const AVFilterPad ainterleave_outputs[] = {
241 {
242 .name = "default",
243 .type = AVMEDIA_TYPE_AUDIO,
244 .config_props = config_output,
245 .request_frame = request_frame,
246 },
247 { NULL }
248};
249
250AVFilter ff_af_ainterleave = {
251 .name = "ainterleave",
252 .description = NULL_IF_CONFIG_SMALL("Temporally interleave audio inputs."),
253 .priv_size = sizeof(InterleaveContext),
254 .init = init,
255 .uninit = uninit,
256 .outputs = ainterleave_outputs,
257 .priv_class = &ainterleave_class,
258 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
259};
260
261#endif
262
generated by cgit at 2024-05-17 01:48:42 (GMT)