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 #include "avfilter.h"
31 #include "formats.h"
32 #include "filters.h"
33 #include "internal.h"
34 #include "audio.h"
35 #include "video.h"
36
37 typedef struct InterleaveContext {
38 const AVClass *class;
39 int nb_inputs;
40 int duration_mode;
41 int64_t pts;
42 } InterleaveContext;
43
44 #define DURATION_LONGEST 0
45 #define DURATION_SHORTEST 1
46 #define DURATION_FIRST 2
47
48 #define OFFSET(x) offsetof(InterleaveContext, x)
49
50 #define DEFINE_OPTIONS(filt_name, flags_) \
51 static const AVOption filt_name##_options[] = { \
52 { "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
53 { "n", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
54 { "duration", "how to determine the end-of-stream", \
55 OFFSET(duration_mode), AV_OPT_TYPE_INT, { .i64 = DURATION_LONGEST }, 0, 2, flags_, "duration" }, \
56 { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, { .i64 = DURATION_LONGEST }, 0, 0, flags_, "duration" }, \
57 { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, { .i64 = DURATION_SHORTEST }, 0, 0, flags_, "duration" }, \
58 { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, { .i64 = DURATION_FIRST }, 0, 0, flags_, "duration" }, \
59 { NULL } \
60 }
61
activate(AVFilterContext * ctx)62 static int activate(AVFilterContext *ctx)
63 {
64 AVFilterLink *outlink = ctx->outputs[0];
65 InterleaveContext *s = ctx->priv;
66 int64_t q_pts, pts = INT64_MAX;
67 int i, nb_eofs = 0, input_idx = -1;
68 int nb_inputs_with_frames = 0;
69
70 FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx);
71
72 for (i = 0; i < ctx->nb_inputs; i++) {
73 if (!ff_inlink_queued_frames(ctx->inputs[i]))
74 continue;
75 nb_inputs_with_frames++;
76 }
77
78 if (nb_inputs_with_frames > 0) {
79 for (i = 0; i < ctx->nb_inputs; i++) {
80 AVFrame *frame;
81
82 if (ff_inlink_queued_frames(ctx->inputs[i]) == 0)
83 continue;
84
85 frame = ff_inlink_peek_frame(ctx->inputs[i], 0);
86 if (frame->pts == AV_NOPTS_VALUE) {
87 int ret;
88
89 av_log(ctx, AV_LOG_WARNING,
90 "NOPTS value for input frame cannot be accepted, frame discarded\n");
91 ret = ff_inlink_consume_frame(ctx->inputs[i], &frame);
92 if (ret < 0)
93 return ret;
94 av_frame_free(&frame);
95 return AVERROR_INVALIDDATA;
96 }
97
98 q_pts = av_rescale_q(frame->pts, ctx->inputs[i]->time_base, AV_TIME_BASE_Q);
99 if (q_pts < pts) {
100 pts = q_pts;
101 input_idx = i;
102 }
103 }
104
105 if (input_idx >= 0) {
106 AVFrame *frame;
107 int ret;
108
109 ret = ff_inlink_consume_frame(ctx->inputs[input_idx], &frame);
110 if (ret < 0)
111 return ret;
112
113 frame->pts = s->pts = pts;
114 return ff_filter_frame(outlink, frame);
115 }
116 }
117
118 for (i = 0; i < ctx->nb_inputs; i++)
119 nb_eofs += !!ff_outlink_get_status(ctx->inputs[i]);
120
121 if ((nb_eofs > 0 && s->duration_mode == DURATION_SHORTEST) ||
122 (nb_eofs == ctx->nb_inputs && s->duration_mode == DURATION_LONGEST) ||
123 (ff_outlink_get_status(ctx->inputs[0]) && s->duration_mode == DURATION_FIRST)) {
124 ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
125 return 0;
126 }
127
128 for (i = 0; i < ctx->nb_inputs; i++) {
129 if (ff_inlink_queued_frames(ctx->inputs[i]))
130 continue;
131 if (ff_outlink_frame_wanted(outlink) &&
132 !ff_outlink_get_status(ctx->inputs[i])) {
133 ff_inlink_request_frame(ctx->inputs[i]);
134 return 0;
135 }
136 }
137
138 if (i) {
139 ff_filter_set_ready(ctx, 100);
140 return 0;
141 }
142
143 return FFERROR_NOT_READY;
144 }
145
init(AVFilterContext * ctx)146 static av_cold int init(AVFilterContext *ctx)
147 {
148 InterleaveContext *s = ctx->priv;
149 const AVFilterPad *outpad = &ctx->filter->outputs[0];
150 int i, ret;
151
152 for (i = 0; i < s->nb_inputs; i++) {
153 AVFilterPad inpad = { 0 };
154
155 inpad.name = av_asprintf("input%d", i);
156 if (!inpad.name)
157 return AVERROR(ENOMEM);
158 inpad.type = outpad->type;
159
160 switch (outpad->type) {
161 case AVMEDIA_TYPE_VIDEO:
162 inpad.get_video_buffer = ff_null_get_video_buffer; break;
163 case AVMEDIA_TYPE_AUDIO:
164 inpad.get_audio_buffer = ff_null_get_audio_buffer; break;
165 default:
166 av_assert0(0);
167 }
168 if ((ret = ff_insert_inpad(ctx, i, &inpad)) < 0) {
169 av_freep(&inpad.name);
170 return ret;
171 }
172 }
173
174 return 0;
175 }
176
uninit(AVFilterContext * ctx)177 static av_cold void uninit(AVFilterContext *ctx)
178 {
179 for (int i = 0; i < ctx->nb_inputs; i++)
180 av_freep(&ctx->input_pads[i].name);
181 }
182
config_output(AVFilterLink * outlink)183 static int config_output(AVFilterLink *outlink)
184 {
185 AVFilterContext *ctx = outlink->src;
186 AVFilterLink *inlink0 = ctx->inputs[0];
187 int i;
188
189 if (outlink->type == AVMEDIA_TYPE_VIDEO) {
190 outlink->time_base = AV_TIME_BASE_Q;
191 outlink->w = inlink0->w;
192 outlink->h = inlink0->h;
193 outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
194 outlink->format = inlink0->format;
195 outlink->frame_rate = (AVRational) {1, 0};
196 for (i = 1; i < ctx->nb_inputs; i++) {
197 AVFilterLink *inlink = ctx->inputs[i];
198
199 if (outlink->w != inlink->w ||
200 outlink->h != inlink->h ||
201 outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num ||
202 outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
203 av_log(ctx, AV_LOG_ERROR, "Parameters for input link %s "
204 "(size %dx%d, SAR %d:%d) do not match the corresponding "
205 "output link parameters (%dx%d, SAR %d:%d)\n",
206 ctx->input_pads[i].name, inlink->w, inlink->h,
207 inlink->sample_aspect_ratio.num,
208 inlink->sample_aspect_ratio.den,
209 outlink->w, outlink->h,
210 outlink->sample_aspect_ratio.num,
211 outlink->sample_aspect_ratio.den);
212 return AVERROR(EINVAL);
213 }
214 }
215 }
216 return 0;
217 }
218
219 #if CONFIG_INTERLEAVE_FILTER
220
221 DEFINE_OPTIONS(interleave, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
222 AVFILTER_DEFINE_CLASS(interleave);
223
224 static const AVFilterPad interleave_outputs[] = {
225 {
226 .name = "default",
227 .type = AVMEDIA_TYPE_VIDEO,
228 .config_props = config_output,
229 },
230 { NULL }
231 };
232
233 AVFilter ff_vf_interleave = {
234 .name = "interleave",
235 .description = NULL_IF_CONFIG_SMALL("Temporally interleave video inputs."),
236 .priv_size = sizeof(InterleaveContext),
237 .init = init,
238 .uninit = uninit,
239 .activate = activate,
240 .outputs = interleave_outputs,
241 .priv_class = &interleave_class,
242 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
243 };
244
245 #endif
246
247 #if CONFIG_AINTERLEAVE_FILTER
248
249 DEFINE_OPTIONS(ainterleave, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
250 AVFILTER_DEFINE_CLASS(ainterleave);
251
252 static const AVFilterPad ainterleave_outputs[] = {
253 {
254 .name = "default",
255 .type = AVMEDIA_TYPE_AUDIO,
256 .config_props = config_output,
257 },
258 { NULL }
259 };
260
261 AVFilter ff_af_ainterleave = {
262 .name = "ainterleave",
263 .description = NULL_IF_CONFIG_SMALL("Temporally interleave audio inputs."),
264 .priv_size = sizeof(InterleaveContext),
265 .init = init,
266 .uninit = uninit,
267 .activate = activate,
268 .outputs = ainterleave_outputs,
269 .priv_class = &ainterleave_class,
270 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
271 };
272
273 #endif
274