274 lines
8.8 KiB
C
274 lines
8.8 KiB
C
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/*
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* Copyright (c) 2013 Stefano Sabatini
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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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/**
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* @file
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* audio and video interleaver
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "filters.h"
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#include "internal.h"
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#include "audio.h"
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#include "video.h"
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typedef struct InterleaveContext {
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const AVClass *class;
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int nb_inputs;
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int duration_mode;
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int64_t pts;
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} InterleaveContext;
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#define DURATION_LONGEST 0
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#define DURATION_SHORTEST 1
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#define DURATION_FIRST 2
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#define OFFSET(x) offsetof(InterleaveContext, x)
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#define DEFINE_OPTIONS(filt_name, flags_) \
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static const AVOption filt_name##_options[] = { \
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{ "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
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{ "n", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
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{ "duration", "how to determine the end-of-stream", \
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OFFSET(duration_mode), AV_OPT_TYPE_INT, { .i64 = DURATION_LONGEST }, 0, 2, flags_, "duration" }, \
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{ "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, { .i64 = DURATION_LONGEST }, 0, 0, flags_, "duration" }, \
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{ "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, { .i64 = DURATION_SHORTEST }, 0, 0, flags_, "duration" }, \
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{ "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, { .i64 = DURATION_FIRST }, 0, 0, flags_, "duration" }, \
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{ NULL } \
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}
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static int activate(AVFilterContext *ctx)
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{
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AVFilterLink *outlink = ctx->outputs[0];
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InterleaveContext *s = ctx->priv;
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int64_t q_pts, pts = INT64_MAX;
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int i, nb_eofs = 0, input_idx = -1;
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int nb_inputs_with_frames = 0;
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FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx);
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for (i = 0; i < ctx->nb_inputs; i++) {
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if (!ff_inlink_queued_frames(ctx->inputs[i]))
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continue;
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nb_inputs_with_frames++;
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}
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if (nb_inputs_with_frames > 0) {
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for (i = 0; i < ctx->nb_inputs; i++) {
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AVFrame *frame;
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if (ff_inlink_queued_frames(ctx->inputs[i]) == 0)
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continue;
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frame = ff_inlink_peek_frame(ctx->inputs[i], 0);
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if (frame->pts == AV_NOPTS_VALUE) {
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int ret;
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av_log(ctx, AV_LOG_WARNING,
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"NOPTS value for input frame cannot be accepted, frame discarded\n");
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ret = ff_inlink_consume_frame(ctx->inputs[i], &frame);
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if (ret < 0)
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return ret;
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av_frame_free(&frame);
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return AVERROR_INVALIDDATA;
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}
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q_pts = av_rescale_q(frame->pts, ctx->inputs[i]->time_base, AV_TIME_BASE_Q);
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if (q_pts < pts) {
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pts = q_pts;
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input_idx = i;
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}
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}
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if (input_idx >= 0) {
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AVFrame *frame;
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int ret;
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ret = ff_inlink_consume_frame(ctx->inputs[input_idx], &frame);
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if (ret < 0)
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return ret;
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frame->pts = s->pts = pts;
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return ff_filter_frame(outlink, frame);
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}
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}
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for (i = 0; i < ctx->nb_inputs; i++)
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nb_eofs += !!ff_outlink_get_status(ctx->inputs[i]);
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if ((nb_eofs > 0 && s->duration_mode == DURATION_SHORTEST) ||
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(nb_eofs == ctx->nb_inputs && s->duration_mode == DURATION_LONGEST) ||
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(ff_outlink_get_status(ctx->inputs[0]) && s->duration_mode == DURATION_FIRST)) {
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ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
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return 0;
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}
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for (i = 0; i < ctx->nb_inputs; i++) {
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if (ff_inlink_queued_frames(ctx->inputs[i]))
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continue;
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if (ff_outlink_frame_wanted(outlink) &&
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!ff_outlink_get_status(ctx->inputs[i])) {
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ff_inlink_request_frame(ctx->inputs[i]);
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return 0;
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}
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}
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if (i) {
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ff_filter_set_ready(ctx, 100);
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return 0;
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}
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return FFERROR_NOT_READY;
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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InterleaveContext *s = ctx->priv;
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const AVFilterPad *outpad = &ctx->filter->outputs[0];
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int i, ret;
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for (i = 0; i < s->nb_inputs; i++) {
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AVFilterPad inpad = { 0 };
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inpad.name = av_asprintf("input%d", i);
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if (!inpad.name)
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return AVERROR(ENOMEM);
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inpad.type = outpad->type;
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switch (outpad->type) {
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case AVMEDIA_TYPE_VIDEO:
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inpad.get_video_buffer = ff_null_get_video_buffer; break;
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case AVMEDIA_TYPE_AUDIO:
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inpad.get_audio_buffer = ff_null_get_audio_buffer; break;
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default:
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av_assert0(0);
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}
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if ((ret = ff_insert_inpad(ctx, i, &inpad)) < 0) {
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av_freep(&inpad.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 av_cold void uninit(AVFilterContext *ctx)
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{
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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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}
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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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AVFilterLink *inlink0 = ctx->inputs[0];
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int i;
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if (outlink->type == AVMEDIA_TYPE_VIDEO) {
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outlink->time_base = AV_TIME_BASE_Q;
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outlink->w = inlink0->w;
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outlink->h = inlink0->h;
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outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
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outlink->format = inlink0->format;
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outlink->frame_rate = (AVRational) {1, 0};
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for (i = 1; i < ctx->nb_inputs; i++) {
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AVFilterLink *inlink = ctx->inputs[i];
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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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outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
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av_log(ctx, AV_LOG_ERROR, "Parameters for input link %s "
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"(size %dx%d, SAR %d:%d) do not match the corresponding "
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"output link parameters (%dx%d, SAR %d:%d)\n",
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ctx->input_pads[i].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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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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return AVERROR(EINVAL);
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}
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}
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}
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return 0;
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}
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#if CONFIG_INTERLEAVE_FILTER
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DEFINE_OPTIONS(interleave, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
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AVFILTER_DEFINE_CLASS(interleave);
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static const AVFilterPad interleave_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_output,
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},
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{ NULL }
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};
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AVFilter ff_vf_interleave = {
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.name = "interleave",
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.description = NULL_IF_CONFIG_SMALL("Temporally interleave video inputs."),
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.priv_size = sizeof(InterleaveContext),
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.init = init,
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.uninit = uninit,
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.activate = activate,
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.outputs = interleave_outputs,
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.priv_class = &interleave_class,
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.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
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};
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#endif
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#if CONFIG_AINTERLEAVE_FILTER
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DEFINE_OPTIONS(ainterleave, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
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AVFILTER_DEFINE_CLASS(ainterleave);
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static const AVFilterPad ainterleave_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.config_props = config_output,
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},
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{ NULL }
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};
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AVFilter ff_af_ainterleave = {
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.name = "ainterleave",
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.description = NULL_IF_CONFIG_SMALL("Temporally interleave audio inputs."),
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.priv_size = sizeof(InterleaveContext),
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.init = init,
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.uninit = uninit,
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.activate = activate,
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.outputs = ainterleave_outputs,
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.priv_class = &ainterleave_class,
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.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
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};
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#endif
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