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 "config_components.h"
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/opt.h"
31
32 #include "avfilter.h"
33 #include "formats.h"
34 #include "filters.h"
35 #include "internal.h"
36 #include "audio.h"
37 #include "video.h"
38
39 typedef struct InterleaveContext {
40 const AVClass *class;
41 int nb_inputs;
42 int duration_mode;
43 int64_t pts;
44 } InterleaveContext;
45
46 #define DURATION_LONGEST 0
47 #define DURATION_SHORTEST 1
48 #define DURATION_FIRST 2
49
50 #define OFFSET(x) offsetof(InterleaveContext, x)
51
52 #define DEFINE_OPTIONS(filt_name, flags_) \
53 static const AVOption filt_name##_options[] = { \
54 { "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
55 { "n", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
56 { "duration", "how to determine the end-of-stream", \
57 OFFSET(duration_mode), AV_OPT_TYPE_INT, { .i64 = DURATION_LONGEST }, 0, 2, flags_, "duration" }, \
58 { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, { .i64 = DURATION_LONGEST }, 0, 0, flags_, "duration" }, \
59 { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, { .i64 = DURATION_SHORTEST }, 0, 0, flags_, "duration" }, \
60 { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, { .i64 = DURATION_FIRST }, 0, 0, flags_, "duration" }, \
61 { NULL } \
62 }
63
activate(AVFilterContext * ctx)64 static int activate(AVFilterContext *ctx)
65 {
66 AVFilterLink *outlink = ctx->outputs[0];
67 InterleaveContext *s = ctx->priv;
68 int64_t q_pts, pts = INT64_MAX;
69 int i, nb_eofs = 0, input_idx = -1;
70 int first_eof = 0;
71 int64_t rpts;
72 int status;
73 int nb_inputs_with_frames = 0;
74
75 FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx);
76
77 for (i = 0; i < ctx->nb_inputs; i++) {
78 int is_eof = !!ff_inlink_acknowledge_status(ctx->inputs[i], &status, &rpts);
79
80 nb_eofs += is_eof;
81 if (i == 0)
82 first_eof = is_eof;
83 }
84
85 if ((nb_eofs > 0 && s->duration_mode == DURATION_SHORTEST) ||
86 (nb_eofs == ctx->nb_inputs && s->duration_mode == DURATION_LONGEST) ||
87 (first_eof && s->duration_mode == DURATION_FIRST)) {
88 ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
89 return 0;
90 }
91
92 for (i = 0; i < ctx->nb_inputs; i++) {
93 if (!ff_inlink_queued_frames(ctx->inputs[i]))
94 continue;
95 nb_inputs_with_frames++;
96 }
97
98 if (nb_inputs_with_frames >= ctx->nb_inputs - nb_eofs) {
99 for (i = 0; i < ctx->nb_inputs; i++) {
100 AVFrame *frame;
101
102 if (ff_inlink_queued_frames(ctx->inputs[i]) == 0)
103 continue;
104
105 frame = ff_inlink_peek_frame(ctx->inputs[i], 0);
106 if (frame->pts == AV_NOPTS_VALUE) {
107 int ret;
108
109 av_log(ctx, AV_LOG_WARNING,
110 "NOPTS value for input frame cannot be accepted, frame discarded\n");
111 ret = ff_inlink_consume_frame(ctx->inputs[i], &frame);
112 if (ret < 0)
113 return ret;
114 av_frame_free(&frame);
115 return AVERROR_INVALIDDATA;
116 }
117
118 q_pts = av_rescale_q(frame->pts, ctx->inputs[i]->time_base, AV_TIME_BASE_Q);
119 if (q_pts < pts) {
120 pts = q_pts;
121 input_idx = i;
122 }
123 }
124
125 if (input_idx >= 0) {
126 AVFrame *frame;
127 int ret;
128
129 ret = ff_inlink_consume_frame(ctx->inputs[input_idx], &frame);
130 if (ret < 0)
131 return ret;
132
133 frame->pts = s->pts = pts;
134 return ff_filter_frame(outlink, frame);
135 }
136 }
137
138 for (i = 0; i < ctx->nb_inputs; i++) {
139 if (ff_inlink_queued_frames(ctx->inputs[i]))
140 continue;
141 if (ff_outlink_frame_wanted(outlink) &&
142 !ff_outlink_get_status(ctx->inputs[i])) {
143 ff_inlink_request_frame(ctx->inputs[i]);
144 return 0;
145 }
146 }
147
148 if (i == ctx->nb_inputs - nb_eofs && ff_outlink_frame_wanted(outlink)) {
149 ff_filter_set_ready(ctx, 100);
150 return 0;
151 }
152
153 return FFERROR_NOT_READY;
154 }
155
init(AVFilterContext * ctx)156 static av_cold int init(AVFilterContext *ctx)
157 {
158 InterleaveContext *s = ctx->priv;
159 const AVFilterPad *outpad = &ctx->filter->outputs[0];
160 int i, ret;
161
162 for (i = 0; i < s->nb_inputs; i++) {
163 AVFilterPad inpad = { 0 };
164
165 inpad.name = av_asprintf("input%d", i);
166 if (!inpad.name)
167 return AVERROR(ENOMEM);
168 inpad.type = outpad->type;
169
170 switch (outpad->type) {
171 case AVMEDIA_TYPE_VIDEO:
172 inpad.get_buffer.video = ff_null_get_video_buffer; break;
173 case AVMEDIA_TYPE_AUDIO:
174 inpad.get_buffer.audio = ff_null_get_audio_buffer; break;
175 default:
176 av_assert0(0);
177 }
178 if ((ret = ff_append_inpad_free_name(ctx, &inpad)) < 0)
179 return ret;
180 }
181
182 return 0;
183 }
184
config_output(AVFilterLink * outlink)185 static int config_output(AVFilterLink *outlink)
186 {
187 AVFilterContext *ctx = outlink->src;
188 AVFilterLink *inlink0 = ctx->inputs[0];
189 int i;
190
191 if (outlink->type == AVMEDIA_TYPE_VIDEO) {
192 outlink->time_base = AV_TIME_BASE_Q;
193 outlink->w = inlink0->w;
194 outlink->h = inlink0->h;
195 outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
196 outlink->format = inlink0->format;
197 outlink->frame_rate = (AVRational) {1, 0};
198 for (i = 1; i < ctx->nb_inputs; i++) {
199 AVFilterLink *inlink = ctx->inputs[i];
200
201 if (outlink->w != inlink->w ||
202 outlink->h != inlink->h ||
203 outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num ||
204 outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
205 av_log(ctx, AV_LOG_ERROR, "Parameters for input link %s "
206 "(size %dx%d, SAR %d:%d) do not match the corresponding "
207 "output link parameters (%dx%d, SAR %d:%d)\n",
208 ctx->input_pads[i].name, inlink->w, inlink->h,
209 inlink->sample_aspect_ratio.num,
210 inlink->sample_aspect_ratio.den,
211 outlink->w, outlink->h,
212 outlink->sample_aspect_ratio.num,
213 outlink->sample_aspect_ratio.den);
214 return AVERROR(EINVAL);
215 }
216 }
217 }
218 return 0;
219 }
220
221 #if CONFIG_INTERLEAVE_FILTER
222
223 DEFINE_OPTIONS(interleave, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
224 AVFILTER_DEFINE_CLASS(interleave);
225
226 static const AVFilterPad interleave_outputs[] = {
227 {
228 .name = "default",
229 .type = AVMEDIA_TYPE_VIDEO,
230 .config_props = config_output,
231 },
232 };
233
234 const AVFilter ff_vf_interleave = {
235 .name = "interleave",
236 .description = NULL_IF_CONFIG_SMALL("Temporally interleave video inputs."),
237 .priv_size = sizeof(InterleaveContext),
238 .init = init,
239 .activate = activate,
240 FILTER_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 };
259
260 const AVFilter ff_af_ainterleave = {
261 .name = "ainterleave",
262 .description = NULL_IF_CONFIG_SMALL("Temporally interleave audio inputs."),
263 .priv_size = sizeof(InterleaveContext),
264 .init = init,
265 .activate = activate,
266 FILTER_OUTPUTS(ainterleave_outputs),
267 .priv_class = &ainterleave_class,
268 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
269 };
270
271 #endif
272