Signed-off-by: Clément Bœsch <u@pkh.me> Signed-off-by: Paul B Mahol <onemda@gmail.com>pull/174/head
Paul B Mahol
9 years ago
parent
14bf59c1d5
commit
d12d48d0a8
6 changed files with 398 additions and 1 deletions
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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 "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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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=FLAGS }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(streamselect); |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
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{ |
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StreamSelectContext *s = inlink->dst->priv; |
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return ff_framesync_filter_frame(&s->fs, inlink, in); |
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} |
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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; |
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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 > 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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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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return ret; |
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} |
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static int request_frame(AVFilterLink *outlink) |
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{ |
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StreamSelectContext *s = outlink->src->priv; |
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return ff_framesync_request_frame(&s->fs, outlink); |
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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, void *filter_frame, int is_audio) |
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{ |
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const int is_input = !!filter_frame; |
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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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pad.filter_frame = filter_frame; |
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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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pad.request_frame = request_frame; |
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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 (;;) { |
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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, filter_frame, s->is_audio)) < 0 || |
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(ret = parse_definition(ctx, nb_outputs, NULL, 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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} |
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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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.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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.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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