mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-24 20:19:55 +00:00
260 lines
8.1 KiB
C
260 lines
8.1 KiB
C
/*
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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 "bufferqueue.h"
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#include "formats.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 {
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const AVClass *class;
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int nb_inputs;
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struct FFBufQueue *queues;
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} InterleaveContext;
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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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{ NULL }, \
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}
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inline static int push_frame(AVFilterContext *ctx)
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{
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InterleaveContext *interleave = ctx->priv;
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AVFrame *frame;
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int i, queue_idx = -1;
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int64_t pts_min = INT64_MAX;
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/* look for oldest frame */
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for (i = 0; i < ctx->nb_inputs; i++) {
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struct FFBufQueue *q = &interleave->queues[i];
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if (!q->available && !ctx->inputs[i]->closed)
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return 0;
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if (q->available) {
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frame = ff_bufqueue_peek(q, 0);
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if (frame->pts < pts_min) {
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pts_min = frame->pts;
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queue_idx = i;
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}
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}
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}
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/* all inputs are closed */
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if (queue_idx < 0)
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return AVERROR_EOF;
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frame = ff_bufqueue_get(&interleave->queues[queue_idx]);
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av_log(ctx, AV_LOG_DEBUG, "queue:%d -> frame time:%f\n",
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queue_idx, frame->pts * av_q2d(AV_TIME_BASE_Q));
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return ff_filter_frame(ctx->outputs[0], frame);
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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AVFilterContext *ctx = inlink->dst;
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InterleaveContext *interleave = ctx->priv;
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unsigned in_no = FF_INLINK_IDX(inlink);
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if (frame->pts == AV_NOPTS_VALUE) {
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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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av_frame_free(&frame);
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return AVERROR_INVALIDDATA;
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}
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/* queue frame */
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frame->pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
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av_log(ctx, AV_LOG_DEBUG, "frame pts:%f -> queue idx:%d available:%d\n",
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frame->pts * av_q2d(AV_TIME_BASE_Q), in_no, interleave->queues[in_no].available);
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ff_bufqueue_add(ctx, &interleave->queues[in_no], frame);
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return push_frame(ctx);
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}
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static int init(AVFilterContext *ctx)
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{
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InterleaveContext *interleave = ctx->priv;
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const AVFilterPad *outpad = &ctx->filter->outputs[0];
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int i;
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interleave->queues = av_calloc(interleave->nb_inputs, sizeof(interleave->queues[0]));
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if (!interleave->queues)
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return AVERROR(ENOMEM);
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for (i = 0; i < interleave->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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inpad.filter_frame = filter_frame;
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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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ff_insert_inpad(ctx, i, &inpad);
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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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InterleaveContext *interleave = ctx->priv;
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int i;
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for (i = 0; i < ctx->nb_inputs; i++) {
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ff_bufqueue_discard_all(&interleave->queues[i]);
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av_freep(&interleave->queues[i]);
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av_freep(&ctx->input_pads[i].name);
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}
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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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outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
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return 0;
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}
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static int request_frame(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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InterleaveContext *interleave = ctx->priv;
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int i, ret;
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for (i = 0; i < ctx->nb_inputs; i++) {
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if (!interleave->queues[i].available && !ctx->inputs[i]->closed) {
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ret = ff_request_frame(ctx->inputs[i]);
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if (ret != AVERROR_EOF)
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return ret;
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}
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}
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return push_frame(ctx);
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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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.request_frame = request_frame,
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},
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{ NULL }
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};
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AVFilter avfilter_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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.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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.request_frame = request_frame,
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},
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{ NULL }
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};
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AVFilter avfilter_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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.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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