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 first_eof = 0;
69 int64_t rpts;
70 int status;
71 int nb_inputs_with_frames = 0;
72
73 FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx);
74
75 for (i = 0; i < ctx->nb_inputs; i++) {
76 int is_eof = !!ff_inlink_acknowledge_status(ctx->inputs[i], &status, &rpts);
77
78 nb_eofs += is_eof;
79 if (i == 0)
80 first_eof = is_eof;
81 }
82
83 if ((nb_eofs > 0 && s->duration_mode == DURATION_SHORTEST) ||
84 (nb_eofs == ctx->nb_inputs && s->duration_mode == DURATION_LONGEST) ||
85 (first_eof && s->duration_mode == DURATION_FIRST)) {
86 ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
87 return 0;
88 }
89
90 for (i = 0; i < ctx->nb_inputs; i++) {
91 if (!ff_inlink_queued_frames(ctx->inputs[i]))
92 continue;
93 nb_inputs_with_frames++;
94 }
95
96 if (nb_inputs_with_frames >= ctx->nb_inputs - nb_eofs) {
97 for (i = 0; i < ctx->nb_inputs; i++) {
98 AVFrame *frame;
99
100 if (ff_inlink_queued_frames(ctx->inputs[i]) == 0)
101 continue;
102
103 frame = ff_inlink_peek_frame(ctx->inputs[i], 0);
104 if (frame->pts == AV_NOPTS_VALUE) {
105 int ret;
106
107 av_log(ctx, AV_LOG_WARNING,
108 "NOPTS value for input frame cannot be accepted, frame discarded\n");
109 ret = ff_inlink_consume_frame(ctx->inputs[i], &frame);
110 if (ret < 0)
111 return ret;
112 av_frame_free(&frame);
113 return AVERROR_INVALIDDATA;
114 }
115
116 q_pts = av_rescale_q(frame->pts, ctx->inputs[i]->time_base, AV_TIME_BASE_Q);
117 if (q_pts < pts) {
118 pts = q_pts;
119 input_idx = i;
120 }
121 }
122
123 if (input_idx >= 0) {
124 AVFrame *frame;
125 int ret;
126
127 ret = ff_inlink_consume_frame(ctx->inputs[input_idx], &frame);
128 if (ret < 0)
129 return ret;
130
131 frame->pts = s->pts = pts;
132 return ff_filter_frame(outlink, frame);
133 }
134 }
135
136 for (i = 0; i < ctx->nb_inputs; i++) {
137 if (ff_inlink_queued_frames(ctx->inputs[i]))
138 continue;
139 if (ff_outlink_frame_wanted(outlink) &&
140 !ff_outlink_get_status(ctx->inputs[i])) {
141 ff_inlink_request_frame(ctx->inputs[i]);
142 return 0;
143 }
144 }
145
146 if (i == ctx->nb_inputs - nb_eofs && ff_outlink_frame_wanted(outlink)) {
147 ff_filter_set_ready(ctx, 100);
148 return 0;
149 }
150
151 return FFERROR_NOT_READY;
152 }
153
init(AVFilterContext * ctx)154 static av_cold int init(AVFilterContext *ctx)
155 {
156 InterleaveContext *s = ctx->priv;
157 const AVFilterPad *outpad = &ctx->filter->outputs[0];
158 int i, ret;
159
160 for (i = 0; i < s->nb_inputs; i++) {
161 AVFilterPad inpad = { 0 };
162
163 inpad.name = av_asprintf("input%d", i);
164 if (!inpad.name)
165 return AVERROR(ENOMEM);
166 inpad.type = outpad->type;
167
168 switch (outpad->type) {
169 case AVMEDIA_TYPE_VIDEO:
170 inpad.get_video_buffer = ff_null_get_video_buffer; break;
171 case AVMEDIA_TYPE_AUDIO:
172 inpad.get_audio_buffer = ff_null_get_audio_buffer; break;
173 default:
174 av_assert0(0);
175 }
176 if ((ret = ff_insert_inpad(ctx, i, &inpad)) < 0) {
177 av_freep(&inpad.name);
178 return ret;
179 }
180 }
181
182 return 0;
183 }
184
uninit(AVFilterContext * ctx)185 static av_cold void uninit(AVFilterContext *ctx)
186 {
187 for (int i = 0; i < ctx->nb_inputs; i++)
188 av_freep(&ctx->input_pads[i].name);
189 }
190
config_output(AVFilterLink * outlink)191 static int config_output(AVFilterLink *outlink)
192 {
193 AVFilterContext *ctx = outlink->src;
194 AVFilterLink *inlink0 = ctx->inputs[0];
195 int i;
196
197 if (outlink->type == AVMEDIA_TYPE_VIDEO) {
198 outlink->time_base = AV_TIME_BASE_Q;
199 outlink->w = inlink0->w;
200 outlink->h = inlink0->h;
201 outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
202 outlink->format = inlink0->format;
203 outlink->frame_rate = (AVRational) {1, 0};
204 for (i = 1; i < ctx->nb_inputs; i++) {
205 AVFilterLink *inlink = ctx->inputs[i];
206
207 if (outlink->w != inlink->w ||
208 outlink->h != inlink->h ||
209 outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num ||
210 outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
211 av_log(ctx, AV_LOG_ERROR, "Parameters for input link %s "
212 "(size %dx%d, SAR %d:%d) do not match the corresponding "
213 "output link parameters (%dx%d, SAR %d:%d)\n",
214 ctx->input_pads[i].name, inlink->w, inlink->h,
215 inlink->sample_aspect_ratio.num,
216 inlink->sample_aspect_ratio.den,
217 outlink->w, outlink->h,
218 outlink->sample_aspect_ratio.num,
219 outlink->sample_aspect_ratio.den);
220 return AVERROR(EINVAL);
221 }
222 }
223 }
224 return 0;
225 }
226
227 #if CONFIG_INTERLEAVE_FILTER
228
229 DEFINE_OPTIONS(interleave, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
230 AVFILTER_DEFINE_CLASS(interleave);
231
232 static const AVFilterPad interleave_outputs[] = {
233 {
234 .name = "default",
235 .type = AVMEDIA_TYPE_VIDEO,
236 .config_props = config_output,
237 },
238 { NULL }
239 };
240
241 AVFilter ff_vf_interleave = {
242 .name = "interleave",
243 .description = NULL_IF_CONFIG_SMALL("Temporally interleave video inputs."),
244 .priv_size = sizeof(InterleaveContext),
245 .init = init,
246 .uninit = uninit,
247 .activate = activate,
248 .outputs = interleave_outputs,
249 .priv_class = &interleave_class,
250 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
251 };
252
253 #endif
254
255 #if CONFIG_AINTERLEAVE_FILTER
256
257 DEFINE_OPTIONS(ainterleave, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
258 AVFILTER_DEFINE_CLASS(ainterleave);
259
260 static const AVFilterPad ainterleave_outputs[] = {
261 {
262 .name = "default",
263 .type = AVMEDIA_TYPE_AUDIO,
264 .config_props = config_output,
265 },
266 { NULL }
267 };
268
269 AVFilter ff_af_ainterleave = {
270 .name = "ainterleave",
271 .description = NULL_IF_CONFIG_SMALL("Temporally interleave audio inputs."),
272 .priv_size = sizeof(InterleaveContext),
273 .init = init,
274 .uninit = uninit,
275 .activate = activate,
276 .outputs = ainterleave_outputs,
277 .priv_class = &ainterleave_class,
278 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
279 };
280
281 #endif
282