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/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/avstring.h" |
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#include "libavutil/internal.h" |
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#include "libavutil/opt.h" |
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#include "avfilter.h" |
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#include "audio.h" |
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#include "filters.h" |
25 |
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#include "formats.h" |
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#include "framesync.h" |
27 |
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#include "internal.h" |
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#include "video.h" |
29 |
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30 |
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typedef struct StreamSelectContext { |
31 |
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const AVClass *class; |
32 |
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int nb_inputs; |
33 |
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char *map_str; |
34 |
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int *map; |
35 |
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int nb_map; |
36 |
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int is_audio; |
37 |
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int64_t *last_pts; |
38 |
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AVFrame **frames; |
39 |
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FFFrameSync fs; |
40 |
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} StreamSelectContext; |
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#define OFFSET(x) offsetof(StreamSelectContext, x) |
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
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#define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM |
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static const AVOption streamselect_options[] = { |
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{ "inputs", "number of input streams", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags=FLAGS }, |
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{ "map", "input indexes to remap to outputs", OFFSET(map_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags=TFLAGS }, |
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{ NULL } |
49 |
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}; |
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AVFILTER_DEFINE_CLASS_EXT(streamselect, "(a)streamselect", streamselect_options); |
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static int process_frame(FFFrameSync *fs) |
54 |
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{ |
55 |
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AVFilterContext *ctx = fs->parent; |
56 |
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StreamSelectContext *s = fs->opaque; |
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AVFrame **in = s->frames; |
58 |
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int i, j, ret = 0, have_out = 0; |
59 |
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for (i = 0; i < ctx->nb_inputs; i++) { |
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if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0) |
62 |
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return ret; |
63 |
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} |
64 |
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65 |
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for (j = 0; j < ctx->nb_inputs; j++) { |
66 |
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for (i = 0; i < s->nb_map; i++) { |
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if (s->map[i] == j) { |
68 |
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AVFrame *out; |
69 |
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70 |
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if (s->is_audio && s->last_pts[j] == in[j]->pts && |
71 |
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ctx->outputs[i]->frame_count_in > 0) |
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continue; |
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out = av_frame_clone(in[j]); |
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if (!out) |
75 |
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return AVERROR(ENOMEM); |
76 |
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out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, ctx->outputs[i]->time_base); |
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s->last_pts[j] = in[j]->pts; |
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ret = ff_filter_frame(ctx->outputs[i], out); |
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have_out = 1; |
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if (ret < 0) |
82 |
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return ret; |
83 |
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} |
84 |
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} |
85 |
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} |
86 |
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if (!have_out) |
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ff_filter_set_ready(ctx, 100); |
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return ret; |
90 |
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} |
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static int activate(AVFilterContext *ctx) |
93 |
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{ |
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StreamSelectContext *s = ctx->priv; |
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return ff_framesync_activate(&s->fs); |
96 |
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} |
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static int config_output(AVFilterLink *outlink) |
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{ |
100 |
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AVFilterContext *ctx = outlink->src; |
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StreamSelectContext *s = ctx->priv; |
102 |
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const int outlink_idx = FF_OUTLINK_IDX(outlink); |
103 |
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const int inlink_idx = s->map[outlink_idx]; |
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AVFilterLink *inlink = ctx->inputs[inlink_idx]; |
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FFFrameSyncIn *in; |
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int i, ret; |
107 |
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av_log(ctx, AV_LOG_VERBOSE, "config output link %d " |
109 |
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"with settings from input link %d\n", |
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outlink_idx, inlink_idx); |
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switch (outlink->type) { |
113 |
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case AVMEDIA_TYPE_VIDEO: |
114 |
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outlink->w = inlink->w; |
115 |
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outlink->h = inlink->h; |
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outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; |
117 |
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outlink->frame_rate = inlink->frame_rate; |
118 |
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break; |
119 |
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case AVMEDIA_TYPE_AUDIO: |
120 |
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outlink->sample_rate = inlink->sample_rate; |
121 |
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outlink->ch_layout.nb_channels = inlink->ch_layout.nb_channels; |
122 |
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break; |
123 |
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} |
124 |
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125 |
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outlink->time_base = inlink->time_base; |
126 |
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outlink->format = inlink->format; |
127 |
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128 |
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if (s->fs.opaque == s) |
129 |
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return 0; |
130 |
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131 |
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if ((ret = ff_framesync_init(&s->fs, ctx, ctx->nb_inputs)) < 0) |
132 |
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return ret; |
133 |
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in = s->fs.in; |
135 |
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s->fs.opaque = s; |
136 |
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s->fs.on_event = process_frame; |
137 |
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138 |
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for (i = 0; i < ctx->nb_inputs; i++) { |
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in[i].time_base = ctx->inputs[i]->time_base; |
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in[i].sync = 1; |
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in[i].before = EXT_STOP; |
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in[i].after = EXT_STOP; |
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} |
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s->frames = av_calloc(ctx->nb_inputs, sizeof(*s->frames)); |
146 |
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if (!s->frames) |
147 |
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return AVERROR(ENOMEM); |
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149 |
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return ff_framesync_configure(&s->fs); |
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} |
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static int parse_definition(AVFilterContext *ctx, int nb_pads, int is_input, int is_audio) |
153 |
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{ |
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const char *padtype = is_input ? "in" : "out"; |
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int i = 0, ret = 0; |
156 |
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157 |
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for (i = 0; i < nb_pads; i++) { |
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AVFilterPad pad = { 0 }; |
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pad.type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO; |
161 |
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162 |
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pad.name = av_asprintf("%sput%d", padtype, i); |
163 |
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if (!pad.name) |
164 |
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return AVERROR(ENOMEM); |
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av_log(ctx, AV_LOG_DEBUG, "Add %s pad %s\n", padtype, pad.name); |
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168 |
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if (is_input) { |
169 |
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ret = ff_append_inpad_free_name(ctx, &pad); |
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} else { |
171 |
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pad.config_props = config_output; |
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ret = ff_append_outpad_free_name(ctx, &pad); |
173 |
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} |
174 |
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if (ret < 0) |
175 |
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return ret; |
176 |
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} |
177 |
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178 |
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return 0; |
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} |
180 |
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181 |
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static int parse_mapping(AVFilterContext *ctx, const char *map) |
182 |
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{ |
183 |
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StreamSelectContext *s = ctx->priv; |
184 |
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int *new_map; |
185 |
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int new_nb_map = 0; |
186 |
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187 |
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if (!map) { |
188 |
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av_log(ctx, AV_LOG_ERROR, "mapping definition is not set\n"); |
189 |
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return AVERROR(EINVAL); |
190 |
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} |
191 |
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192 |
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new_map = av_calloc(s->nb_inputs, sizeof(*new_map)); |
193 |
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if (!new_map) |
194 |
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return AVERROR(ENOMEM); |
195 |
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196 |
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while (1) { |
197 |
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char *p; |
198 |
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const int n = strtol(map, &p, 0); |
199 |
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200 |
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av_log(ctx, AV_LOG_DEBUG, "n=%d map=%p p=%p\n", n, map, p); |
201 |
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202 |
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if (map == p) |
203 |
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break; |
204 |
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map = p; |
205 |
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206 |
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if (new_nb_map >= s->nb_inputs) { |
207 |
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av_log(ctx, AV_LOG_ERROR, "Unable to map more than the %d " |
208 |
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"input pads available\n", s->nb_inputs); |
209 |
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av_free(new_map); |
210 |
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return AVERROR(EINVAL); |
211 |
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} |
212 |
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213 |
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if (n < 0 || n >= ctx->nb_inputs) { |
214 |
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av_log(ctx, AV_LOG_ERROR, "Input stream index %d doesn't exist " |
215 |
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"(there is only %d input streams defined)\n", |
216 |
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n, s->nb_inputs); |
217 |
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av_free(new_map); |
218 |
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return AVERROR(EINVAL); |
219 |
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} |
220 |
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221 |
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av_log(ctx, AV_LOG_VERBOSE, "Map input stream %d to output stream %d\n", n, new_nb_map); |
222 |
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new_map[new_nb_map++] = n; |
223 |
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} |
224 |
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225 |
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if (!new_nb_map) { |
226 |
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av_log(ctx, AV_LOG_ERROR, "invalid mapping\n"); |
227 |
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av_free(new_map); |
228 |
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return AVERROR(EINVAL); |
229 |
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} |
230 |
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231 |
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✗ |
av_freep(&s->map); |
232 |
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s->map = new_map; |
233 |
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s->nb_map = new_nb_map; |
234 |
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235 |
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av_log(ctx, AV_LOG_VERBOSE, "%d map set\n", s->nb_map); |
236 |
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237 |
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return 0; |
238 |
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} |
239 |
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240 |
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static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, |
241 |
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char *res, int res_len, int flags) |
242 |
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{ |
243 |
|
✗ |
if (!strcmp(cmd, "map")) { |
244 |
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int ret = parse_mapping(ctx, args); |
245 |
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246 |
|
✗ |
if (ret < 0) |
247 |
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✗ |
return ret; |
248 |
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✗ |
return ff_filter_config_links(ctx); |
249 |
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} |
250 |
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✗ |
return AVERROR(ENOSYS); |
251 |
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} |
252 |
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253 |
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✗ |
static av_cold int init(AVFilterContext *ctx) |
254 |
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{ |
255 |
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✗ |
StreamSelectContext *s = ctx->priv; |
256 |
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✗ |
int ret, nb_outputs = 0; |
257 |
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✗ |
char *map = s->map_str; |
258 |
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|
259 |
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✗ |
if (!strcmp(ctx->filter->name, "astreamselect")) |
260 |
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✗ |
s->is_audio = 1; |
261 |
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|
262 |
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✗ |
for (; map;) { |
263 |
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char *p; |
264 |
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|
265 |
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✗ |
strtol(map, &p, 0); |
266 |
|
✗ |
if (map == p) |
267 |
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✗ |
break; |
268 |
|
✗ |
nb_outputs++; |
269 |
|
✗ |
map = p; |
270 |
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} |
271 |
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|
272 |
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✗ |
s->last_pts = av_calloc(s->nb_inputs, sizeof(*s->last_pts)); |
273 |
|
✗ |
if (!s->last_pts) |
274 |
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✗ |
return AVERROR(ENOMEM); |
275 |
|
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|
276 |
|
✗ |
if ((ret = parse_definition(ctx, s->nb_inputs, 1, s->is_audio)) < 0 || |
277 |
|
✗ |
(ret = parse_definition(ctx, nb_outputs, 0, s->is_audio)) < 0) |
278 |
|
✗ |
return ret; |
279 |
|
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|
280 |
|
✗ |
av_log(ctx, AV_LOG_DEBUG, "Configured with %d inpad and %d outpad\n", |
281 |
|
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ctx->nb_inputs, ctx->nb_outputs); |
282 |
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|
283 |
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✗ |
return parse_mapping(ctx, s->map_str); |
284 |
|
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} |
285 |
|
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|
286 |
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✗ |
static av_cold void uninit(AVFilterContext *ctx) |
287 |
|
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{ |
288 |
|
✗ |
StreamSelectContext *s = ctx->priv; |
289 |
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|
290 |
|
✗ |
av_freep(&s->last_pts); |
291 |
|
✗ |
av_freep(&s->map); |
292 |
|
✗ |
av_freep(&s->frames); |
293 |
|
✗ |
ff_framesync_uninit(&s->fs); |
294 |
|
✗ |
} |
295 |
|
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|
296 |
|
✗ |
static int query_formats(AVFilterContext *ctx) |
297 |
|
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{ |
298 |
|
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AVFilterFormats *formats; |
299 |
|
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int ret, i; |
300 |
|
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|
301 |
|
✗ |
for (i = 0; i < ctx->nb_inputs; i++) { |
302 |
|
✗ |
formats = ff_all_formats(ctx->inputs[i]->type); |
303 |
|
✗ |
if ((ret = ff_set_common_formats(ctx, formats)) < 0) |
304 |
|
✗ |
return ret; |
305 |
|
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|
306 |
|
✗ |
if (ctx->inputs[i]->type == AVMEDIA_TYPE_AUDIO) { |
307 |
|
✗ |
if ((ret = ff_set_common_all_samplerates (ctx)) < 0 || |
308 |
|
✗ |
(ret = ff_set_common_all_channel_counts(ctx)) < 0) |
309 |
|
✗ |
return ret; |
310 |
|
|
} |
311 |
|
|
} |
312 |
|
|
|
313 |
|
✗ |
return 0; |
314 |
|
|
} |
315 |
|
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|
316 |
|
|
const AVFilter ff_vf_streamselect = { |
317 |
|
|
.name = "streamselect", |
318 |
|
|
.description = NULL_IF_CONFIG_SMALL("Select video streams"), |
319 |
|
|
.init = init, |
320 |
|
|
FILTER_QUERY_FUNC(query_formats), |
321 |
|
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.process_command = process_command, |
322 |
|
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.uninit = uninit, |
323 |
|
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.activate = activate, |
324 |
|
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.priv_size = sizeof(StreamSelectContext), |
325 |
|
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.priv_class = &streamselect_class, |
326 |
|
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.flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS, |
327 |
|
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}; |
328 |
|
|
|
329 |
|
|
const AVFilter ff_af_astreamselect = { |
330 |
|
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.name = "astreamselect", |
331 |
|
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.description = NULL_IF_CONFIG_SMALL("Select audio streams"), |
332 |
|
|
.priv_class = &streamselect_class, |
333 |
|
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.init = init, |
334 |
|
|
FILTER_QUERY_FUNC(query_formats), |
335 |
|
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.process_command = process_command, |
336 |
|
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.uninit = uninit, |
337 |
|
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.activate = activate, |
338 |
|
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.priv_size = sizeof(StreamSelectContext), |
339 |
|
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.flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS, |
340 |
|
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}; |
341 |
|
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|