358 lines
10 KiB
C
358 lines
10 KiB
C
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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"
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#include "formats.h"
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#include "framesync.h"
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#include "internal.h"
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#include "video.h"
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typedef struct StreamSelectContext {
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const AVClass *class;
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int nb_inputs;
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char *map_str;
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int *map;
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int nb_map;
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int is_audio;
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int64_t *last_pts;
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AVFrame **frames;
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FFFrameSync fs;
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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 }
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};
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AVFILTER_DEFINE_CLASS(streamselect);
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static int process_frame(FFFrameSync *fs)
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{
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AVFilterContext *ctx = fs->parent;
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StreamSelectContext *s = fs->opaque;
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AVFrame **in = s->frames;
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int i, j, ret = 0, have_out = 0;
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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)
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return ret;
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}
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for (j = 0; j < ctx->nb_inputs; j++) {
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for (i = 0; i < s->nb_map; i++) {
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if (s->map[i] == j) {
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AVFrame *out;
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if (s->is_audio && s->last_pts[j] == in[j]->pts &&
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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)
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return AVERROR(ENOMEM);
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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)
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return ret;
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}
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}
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}
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if (!have_out)
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ff_filter_set_ready(ctx, 100);
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return ret;
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}
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static int activate(AVFilterContext *ctx)
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{
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StreamSelectContext *s = ctx->priv;
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return ff_framesync_activate(&s->fs);
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}
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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StreamSelectContext *s = ctx->priv;
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const int outlink_idx = FF_OUTLINK_IDX(outlink);
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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;
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av_log(ctx, AV_LOG_VERBOSE, "config output link %d "
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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) {
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case AVMEDIA_TYPE_VIDEO:
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outlink->w = inlink->w;
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outlink->h = inlink->h;
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outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
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outlink->frame_rate = inlink->frame_rate;
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break;
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case AVMEDIA_TYPE_AUDIO:
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outlink->sample_rate = inlink->sample_rate;
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outlink->channels = inlink->channels;
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outlink->channel_layout = inlink->channel_layout;
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break;
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}
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outlink->time_base = inlink->time_base;
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outlink->format = inlink->format;
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if (s->fs.opaque == s)
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return 0;
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if ((ret = ff_framesync_init(&s->fs, ctx, ctx->nb_inputs)) < 0)
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return ret;
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in = s->fs.in;
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s->fs.opaque = s;
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s->fs.on_event = process_frame;
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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));
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if (!s->frames)
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return AVERROR(ENOMEM);
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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)
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{
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const char *padtype = is_input ? "in" : "out";
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int i = 0, ret = 0;
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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;
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pad.name = av_asprintf("%sput%d", padtype, i);
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if (!pad.name)
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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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if (is_input) {
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ret = ff_insert_inpad(ctx, i, &pad);
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} else {
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pad.config_props = config_output;
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ret = ff_insert_outpad(ctx, i, &pad);
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}
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if (ret < 0) {
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av_freep(&pad.name);
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return ret;
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}
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}
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return 0;
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}
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static int parse_mapping(AVFilterContext *ctx, const char *map)
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{
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StreamSelectContext *s = ctx->priv;
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int *new_map;
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int new_nb_map = 0;
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if (!map) {
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av_log(ctx, AV_LOG_ERROR, "mapping definition is not set\n");
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return AVERROR(EINVAL);
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}
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new_map = av_calloc(s->nb_inputs, sizeof(*new_map));
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if (!new_map)
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return AVERROR(ENOMEM);
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while (1) {
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char *p;
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const int n = strtol(map, &p, 0);
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av_log(ctx, AV_LOG_DEBUG, "n=%d map=%p p=%p\n", n, map, p);
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if (map == p)
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break;
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map = p;
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if (new_nb_map >= s->nb_inputs) {
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av_log(ctx, AV_LOG_ERROR, "Unable to map more than the %d "
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"input pads available\n", s->nb_inputs);
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av_free(new_map);
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return AVERROR(EINVAL);
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}
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if (n < 0 || n >= ctx->nb_inputs) {
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av_log(ctx, AV_LOG_ERROR, "Input stream index %d doesn't exist "
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"(there is only %d input streams defined)\n",
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n, s->nb_inputs);
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av_free(new_map);
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return AVERROR(EINVAL);
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}
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av_log(ctx, AV_LOG_VERBOSE, "Map input stream %d to output stream %d\n", n, new_nb_map);
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new_map[new_nb_map++] = n;
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}
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if (!new_nb_map) {
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av_log(ctx, AV_LOG_ERROR, "invalid mapping\n");
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av_free(new_map);
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return AVERROR(EINVAL);
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}
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av_freep(&s->map);
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s->map = new_map;
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s->nb_map = new_nb_map;
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av_log(ctx, AV_LOG_VERBOSE, "%d map set\n", s->nb_map);
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return 0;
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}
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static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
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char *res, int res_len, int flags)
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{
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if (!strcmp(cmd, "map")) {
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int ret = parse_mapping(ctx, args);
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if (ret < 0)
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return ret;
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return avfilter_config_links(ctx);
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}
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return AVERROR(ENOSYS);
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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StreamSelectContext *s = ctx->priv;
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int ret, nb_outputs = 0;
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char *map = s->map_str;
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if (!strcmp(ctx->filter->name, "astreamselect"))
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s->is_audio = 1;
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for (; map;) {
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char *p;
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strtol(map, &p, 0);
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if (map == p)
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break;
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nb_outputs++;
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map = p;
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}
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s->last_pts = av_calloc(s->nb_inputs, sizeof(*s->last_pts));
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if (!s->last_pts)
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return AVERROR(ENOMEM);
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if ((ret = parse_definition(ctx, s->nb_inputs, 1, s->is_audio)) < 0 ||
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(ret = parse_definition(ctx, nb_outputs, 0, s->is_audio)) < 0)
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return ret;
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av_log(ctx, AV_LOG_DEBUG, "Configured with %d inpad and %d outpad\n",
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ctx->nb_inputs, ctx->nb_outputs);
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return parse_mapping(ctx, s->map_str);
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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StreamSelectContext *s = ctx->priv;
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av_freep(&s->last_pts);
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av_freep(&s->map);
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av_freep(&s->frames);
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ff_framesync_uninit(&s->fs);
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for (int i = 0; i < ctx->nb_inputs; i++)
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av_freep(&ctx->input_pads[i].name);
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for (int i = 0; i < ctx->nb_outputs; i++)
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av_freep(&ctx->output_pads[i].name);
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}
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static int query_formats(AVFilterContext *ctx)
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{
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AVFilterFormats *formats, *rates = NULL;
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AVFilterChannelLayouts *layouts = NULL;
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int ret, i;
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for (i = 0; i < ctx->nb_inputs; i++) {
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formats = ff_all_formats(ctx->inputs[i]->type);
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if ((ret = ff_set_common_formats(ctx, formats)) < 0)
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return ret;
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if (ctx->inputs[i]->type == AVMEDIA_TYPE_AUDIO) {
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rates = ff_all_samplerates();
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if ((ret = ff_set_common_samplerates(ctx, rates)) < 0)
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return ret;
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layouts = ff_all_channel_counts();
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if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
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return ret;
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}
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}
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return 0;
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}
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AVFilter ff_vf_streamselect = {
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.name = "streamselect",
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.description = NULL_IF_CONFIG_SMALL("Select video streams"),
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.init = init,
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.query_formats = query_formats,
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.process_command = process_command,
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.uninit = uninit,
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.activate = activate,
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.priv_size = sizeof(StreamSelectContext),
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.priv_class = &streamselect_class,
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.flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
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};
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#define astreamselect_options streamselect_options
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AVFILTER_DEFINE_CLASS(astreamselect);
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AVFilter ff_af_astreamselect = {
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.name = "astreamselect",
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.description = NULL_IF_CONFIG_SMALL("Select audio streams"),
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.init = init,
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.query_formats = query_formats,
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.process_command = process_command,
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.uninit = uninit,
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.activate = activate,
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.priv_size = sizeof(StreamSelectContext),
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.priv_class = &astreamselect_class,
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.flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
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};
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