mirror of
https://github.com/FFmpeg/FFmpeg.git
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6d75d44d90
All that remains in it are things that belong in avfilter_internal.h. Move them there and remove internal.h
466 lines
16 KiB
C
466 lines
16 KiB
C
/*
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* Copyright (c) 2012 Nicolas George
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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.
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* See the GNU 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 License
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* along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* concat audio-video filter
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*/
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#include "libavutil/avstring.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/mem.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "filters.h"
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#include "formats.h"
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#include "video.h"
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#include "audio.h"
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#define TYPE_ALL 2
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typedef struct ConcatContext {
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const AVClass *class;
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unsigned nb_streams[TYPE_ALL]; /**< number of out streams of each type */
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unsigned nb_segments;
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unsigned cur_idx; /**< index of the first input of current segment */
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int64_t delta_ts; /**< timestamp to add to produce output timestamps */
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unsigned nb_in_active; /**< number of active inputs in current segment */
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unsigned unsafe;
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struct concat_in {
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int64_t pts;
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int64_t nb_frames;
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unsigned eof;
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} *in;
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} ConcatContext;
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#define OFFSET(x) offsetof(ConcatContext, x)
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#define A AV_OPT_FLAG_AUDIO_PARAM
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#define F AV_OPT_FLAG_FILTERING_PARAM
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#define V AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption concat_options[] = {
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{ "n", "specify the number of segments", OFFSET(nb_segments),
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AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, V|A|F},
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{ "v", "specify the number of video streams",
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OFFSET(nb_streams[AVMEDIA_TYPE_VIDEO]),
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AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, V|F },
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{ "a", "specify the number of audio streams",
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OFFSET(nb_streams[AVMEDIA_TYPE_AUDIO]),
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AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A|F},
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{ "unsafe", "enable unsafe mode",
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OFFSET(unsafe),
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AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, V|A|F},
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(concat);
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static int query_formats(AVFilterContext *ctx)
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{
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ConcatContext *cat = ctx->priv;
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unsigned type, nb_str, idx0 = 0, idx, str, seg;
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AVFilterFormats *formats, *rates = NULL;
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AVFilterChannelLayouts *layouts = NULL;
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int ret;
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for (type = 0; type < TYPE_ALL; type++) {
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nb_str = cat->nb_streams[type];
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for (str = 0; str < nb_str; str++) {
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idx = idx0;
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/* Set the output formats */
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formats = ff_all_formats(type);
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if ((ret = ff_formats_ref(formats, &ctx->outputs[idx]->incfg.formats)) < 0)
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return ret;
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if (type == AVMEDIA_TYPE_AUDIO) {
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rates = ff_all_samplerates();
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if ((ret = ff_formats_ref(rates, &ctx->outputs[idx]->incfg.samplerates)) < 0)
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return ret;
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layouts = ff_all_channel_layouts();
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if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[idx]->incfg.channel_layouts)) < 0)
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return ret;
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}
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/* Set the same formats for each corresponding input */
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for (seg = 0; seg < cat->nb_segments; seg++) {
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if ((ret = ff_formats_ref(formats, &ctx->inputs[idx]->outcfg.formats)) < 0)
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return ret;
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if (type == AVMEDIA_TYPE_AUDIO) {
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if ((ret = ff_formats_ref(rates, &ctx->inputs[idx]->outcfg.samplerates)) < 0 ||
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(ret = ff_channel_layouts_ref(layouts, &ctx->inputs[idx]->outcfg.channel_layouts)) < 0)
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return ret;
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}
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idx += ctx->nb_outputs;
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}
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idx0++;
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}
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}
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return 0;
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}
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static int config_output(AVFilterLink *outlink)
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{
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FilterLink *outl = ff_filter_link(outlink);
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AVFilterContext *ctx = outlink->src;
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ConcatContext *cat = ctx->priv;
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unsigned out_no = FF_OUTLINK_IDX(outlink);
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unsigned in_no = out_no, seg;
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AVFilterLink *inlink = ctx->inputs[in_no];
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FilterLink *inl = ff_filter_link(inlink);
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/* enhancement: find a common one */
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outlink->time_base = AV_TIME_BASE_Q;
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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->format = inlink->format;
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outl->frame_rate = inl->frame_rate;
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for (seg = 1; seg < cat->nb_segments; seg++) {
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inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
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inl = ff_filter_link(inlink);
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if (outl->frame_rate.num != inl->frame_rate.num ||
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outl->frame_rate.den != inl->frame_rate.den) {
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av_log(ctx, AV_LOG_VERBOSE,
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"Video inputs have different frame rates, output will be VFR\n");
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outl->frame_rate = av_make_q(1, 0);
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break;
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}
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}
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for (seg = 1; seg < cat->nb_segments; seg++) {
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inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
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if (!outlink->sample_aspect_ratio.num)
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outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
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/* possible enhancement: unsafe mode, do not check */
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if (outlink->w != inlink->w ||
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outlink->h != inlink->h ||
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outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num &&
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inlink->sample_aspect_ratio.num ||
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outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
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av_log(ctx, AV_LOG_ERROR, "Input link %s parameters "
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"(size %dx%d, SAR %d:%d) do not match the corresponding "
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"output link %s parameters (%dx%d, SAR %d:%d)\n",
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ctx->input_pads[in_no].name, inlink->w, inlink->h,
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inlink->sample_aspect_ratio.num,
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inlink->sample_aspect_ratio.den,
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ctx->input_pads[out_no].name, outlink->w, outlink->h,
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outlink->sample_aspect_ratio.num,
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outlink->sample_aspect_ratio.den);
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if (!cat->unsafe)
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return AVERROR(EINVAL);
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}
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}
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return 0;
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}
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static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
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{
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ConcatContext *cat = ctx->priv;
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unsigned out_no = in_no % ctx->nb_outputs;
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AVFilterLink * inlink = ctx-> inputs[ in_no];
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AVFilterLink *outlink = ctx->outputs[out_no];
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struct concat_in *in = &cat->in[in_no];
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buf->pts = av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
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buf->duration = av_rescale_q(buf->duration, inlink->time_base, outlink->time_base);
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in->pts = buf->pts;
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in->nb_frames++;
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/* add duration to input PTS */
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if (inlink->sample_rate)
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/* use number of audio samples */
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in->pts += av_rescale_q(buf->nb_samples,
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av_make_q(1, inlink->sample_rate),
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outlink->time_base);
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else if (in->nb_frames >= 2)
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/* use mean duration */
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in->pts = av_rescale(in->pts, in->nb_frames, in->nb_frames - 1);
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buf->pts += cat->delta_ts;
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return ff_filter_frame(outlink, buf);
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}
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static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
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{
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AVFilterContext *ctx = inlink->dst;
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unsigned in_no = FF_INLINK_IDX(inlink);
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AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
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return ff_get_video_buffer(outlink, w, h);
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}
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static AVFrame *get_audio_buffer(AVFilterLink *inlink, int nb_samples)
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{
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AVFilterContext *ctx = inlink->dst;
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unsigned in_no = FF_INLINK_IDX(inlink);
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AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
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return ff_get_audio_buffer(outlink, nb_samples);
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}
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static void close_input(AVFilterContext *ctx, unsigned in_no)
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{
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ConcatContext *cat = ctx->priv;
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cat->in[in_no].eof = 1;
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cat->nb_in_active--;
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av_log(ctx, AV_LOG_VERBOSE, "EOF on %s, %d streams left in segment.\n",
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ctx->input_pads[in_no].name, cat->nb_in_active);
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}
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static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
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{
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ConcatContext *cat = ctx->priv;
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unsigned i = cat->cur_idx;
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unsigned imax = i + ctx->nb_outputs;
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int64_t pts;
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pts = cat->in[i++].pts;
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for (; i < imax; i++)
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pts = FFMAX(pts, cat->in[i].pts);
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cat->delta_ts += pts;
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*seg_delta = pts;
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}
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static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no,
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int64_t seg_delta)
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{
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ConcatContext *cat = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[out_no];
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int64_t base_pts = cat->in[in_no].pts + cat->delta_ts - seg_delta;
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int64_t nb_samples, sent = 0;
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int frame_nb_samples, ret;
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AVRational rate_tb = { 1, ctx->inputs[in_no]->sample_rate };
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AVFrame *buf;
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if (!rate_tb.den)
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return AVERROR_BUG;
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if (cat->in[in_no].pts < INT64_MIN + seg_delta)
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return AVERROR_INVALIDDATA;
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if (seg_delta < cat->in[in_no].pts)
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return AVERROR_INVALIDDATA;
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nb_samples = av_rescale_q(seg_delta - cat->in[in_no].pts,
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outlink->time_base, rate_tb);
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frame_nb_samples = FFMAX(9600, rate_tb.den / 5); /* arbitrary */
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while (nb_samples) {
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frame_nb_samples = FFMIN(frame_nb_samples, nb_samples);
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buf = ff_get_audio_buffer(outlink, frame_nb_samples);
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if (!buf)
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return AVERROR(ENOMEM);
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av_samples_set_silence(buf->extended_data, 0, frame_nb_samples,
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outlink->ch_layout.nb_channels, outlink->format);
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buf->pts = base_pts + av_rescale_q(sent, rate_tb, outlink->time_base);
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ret = ff_filter_frame(outlink, buf);
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if (ret < 0)
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return ret;
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sent += frame_nb_samples;
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nb_samples -= frame_nb_samples;
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}
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return 0;
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}
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static int flush_segment(AVFilterContext *ctx)
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{
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int ret;
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ConcatContext *cat = ctx->priv;
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unsigned str, str_max;
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int64_t seg_delta;
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find_next_delta_ts(ctx, &seg_delta);
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cat->cur_idx += ctx->nb_outputs;
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cat->nb_in_active = ctx->nb_outputs;
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av_log(ctx, AV_LOG_VERBOSE, "Segment finished at pts=%"PRId64"\n",
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cat->delta_ts);
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if (cat->cur_idx < ctx->nb_inputs) {
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/* pad audio streams with silence */
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str = cat->nb_streams[AVMEDIA_TYPE_VIDEO];
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str_max = str + cat->nb_streams[AVMEDIA_TYPE_AUDIO];
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for (; str < str_max; str++) {
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ret = send_silence(ctx, cat->cur_idx - ctx->nb_outputs + str, str,
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seg_delta);
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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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return 0;
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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ConcatContext *cat = ctx->priv;
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unsigned seg, type, str;
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int ret;
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/* create input pads */
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for (seg = 0; seg < cat->nb_segments; seg++) {
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for (type = 0; type < TYPE_ALL; type++) {
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for (str = 0; str < cat->nb_streams[type]; str++) {
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AVFilterPad pad = {
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.type = type,
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};
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if (type == AVMEDIA_TYPE_VIDEO)
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pad.get_buffer.video = get_video_buffer;
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else
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pad.get_buffer.audio = get_audio_buffer;
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pad.name = av_asprintf("in%d:%c%d", seg, "va"[type], str);
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if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
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return ret;
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}
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}
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}
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/* create output pads */
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for (type = 0; type < TYPE_ALL; type++) {
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for (str = 0; str < cat->nb_streams[type]; str++) {
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AVFilterPad pad = {
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.type = type,
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.config_props = config_output,
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};
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pad.name = av_asprintf("out:%c%d", "va"[type], str);
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if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
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return ret;
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}
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}
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cat->in = av_calloc(ctx->nb_inputs, sizeof(*cat->in));
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if (!cat->in)
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return AVERROR(ENOMEM);
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cat->nb_in_active = ctx->nb_outputs;
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return 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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ConcatContext *cat = ctx->priv;
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av_freep(&cat->in);
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}
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static int activate(AVFilterContext *ctx)
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{
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ConcatContext *cat = ctx->priv;
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AVFrame *frame;
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unsigned i, j;
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int ret, status;
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int64_t pts;
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/* Forward status back */
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for (i = 0; i < ctx->nb_outputs; i++) {
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status = ff_outlink_get_status(ctx->outputs[i]);
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if (!status)
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continue;
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for (j = i; j < ctx->nb_inputs; j += ctx->nb_outputs) {
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if (!cat->in[j].eof) {
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cat->in[j].eof = 1;
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ff_inlink_set_status(ctx->inputs[j], status);
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return 0;
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}
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}
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}
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/* Forward available frames */
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if (cat->cur_idx < ctx->nb_inputs) {
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for (i = 0; i < ctx->nb_outputs; i++) {
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ret = ff_inlink_consume_frame(ctx->inputs[cat->cur_idx + i], &frame);
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if (ret < 0)
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return ret;
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if (ret) {
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ff_filter_set_ready(ctx, 10);
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return push_frame(ctx, cat->cur_idx + i, frame);
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}
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}
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}
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/* Forward status change */
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if (cat->cur_idx < ctx->nb_inputs) {
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for (i = 0; i < ctx->nb_outputs; i++) {
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AVFilterLink *inlink = ctx->inputs[cat->cur_idx + i];
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ret = ff_inlink_acknowledge_status(inlink, &status, &pts);
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/* TODO use pts */
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if (ret > 0) {
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close_input(ctx, cat->cur_idx + i);
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if (cat->cur_idx + ctx->nb_outputs >= ctx->nb_inputs) {
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int64_t eof_pts = cat->delta_ts;
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eof_pts += av_rescale_q(pts, inlink->time_base, ctx->outputs[i]->time_base);
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ff_outlink_set_status(ctx->outputs[i], status, eof_pts);
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}
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if (!cat->nb_in_active) {
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ret = flush_segment(ctx);
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if (ret < 0)
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return ret;
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}
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ff_filter_set_ready(ctx, 10);
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return 0;
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}
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}
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}
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ret = FFERROR_NOT_READY;
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for (i = 0; i < ctx->nb_outputs; i++) {
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if (ff_outlink_frame_wanted(ctx->outputs[i])) {
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if (cat->in[cat->cur_idx + i].eof) {
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for (j = 0; j < ctx->nb_outputs; j++)
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if (!cat->in[cat->cur_idx + j].eof)
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ff_inlink_request_frame(ctx->inputs[cat->cur_idx + j]);
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return 0;
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} else {
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ff_inlink_request_frame(ctx->inputs[cat->cur_idx + i]);
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ret = 0;
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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 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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int ret = AVERROR(ENOSYS);
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if (!strcmp(cmd, "next")) {
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av_log(ctx, AV_LOG_VERBOSE, "Command received: next\n");
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return flush_segment(ctx);
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}
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return ret;
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}
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const AVFilter ff_avf_concat = {
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.name = "concat",
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.description = NULL_IF_CONFIG_SMALL("Concatenate audio and video streams."),
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.init = init,
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.uninit = uninit,
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.activate = activate,
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.priv_size = sizeof(ConcatContext),
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.inputs = NULL,
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.outputs = NULL,
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.priv_class = &concat_class,
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.flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
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FILTER_QUERY_FUNC(query_formats),
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.process_command = process_command,
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};
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