627 lines
20 KiB
C
627 lines
20 KiB
C
/*
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* Copyright (c) 2008 Vitor Sessak
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* Copyright (c) 2010 S.N. Hemanth Meenakshisundaram
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* Copyright (c) 2011 Mina Nagy Zaki
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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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* memory buffer source filter
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*/
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#include "avfilter.h"
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#include "internal.h"
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#include "avcodec.h"
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#include "buffersrc.h"
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#include "vsrc_buffer.h"
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#include "asrc_abuffer.h"
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#include "libavutil/audioconvert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/fifo.h"
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#include "libavutil/imgutils.h"
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typedef struct {
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AVFifoBuffer *fifo;
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AVRational time_base; ///< time_base to set in the output link
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int eof;
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unsigned nb_failed_requests;
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/* Video only */
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AVFilterContext *scale;
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int h, w;
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enum PixelFormat pix_fmt;
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AVRational sample_aspect_ratio;
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char sws_param[256];
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/* Audio only */
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// Audio format of incoming buffers
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int sample_rate;
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unsigned int sample_format;
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int64_t channel_layout;
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int packing_format;
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// Normalization filters
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AVFilterContext *aconvert;
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AVFilterContext *aresample;
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} BufferSourceContext;
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#define FIFO_SIZE 8
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#define CHECK_PARAM_CHANGE(s, c, width, height, format)\
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if (c->w != width || c->h != height || c->pix_fmt != format) {\
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av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
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return AVERROR(EINVAL);\
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}
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int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter,
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AVFilterBufferRef *picref, int flags)
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{
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BufferSourceContext *c = buffer_filter->priv;
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AVFilterLink *outlink = buffer_filter->outputs[0];
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AVFilterBufferRef *buf;
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int ret;
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if (!picref) {
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c->eof = 1;
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return 0;
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} else if (c->eof)
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return AVERROR(EINVAL);
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if (!av_fifo_space(c->fifo) &&
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(ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
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sizeof(buf))) < 0)
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return ret;
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if (picref->video->w != c->w || picref->video->h != c->h || picref->format != c->pix_fmt) {
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AVFilterContext *scale = buffer_filter->outputs[0]->dst;
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AVFilterLink *link;
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char scale_param[1024];
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av_log(buffer_filter, AV_LOG_INFO,
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"Buffer video input changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
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c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
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picref->video->w, picref->video->h, av_pix_fmt_descriptors[picref->format].name);
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if (!scale || strcmp(scale->filter->name, "scale")) {
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AVFilter *f = avfilter_get_by_name("scale");
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av_log(buffer_filter, AV_LOG_INFO, "Inserting scaler filter\n");
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if ((ret = avfilter_open(&scale, f, "Input equalizer")) < 0)
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return ret;
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c->scale = scale;
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snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s", c->w, c->h, c->sws_param);
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if ((ret = avfilter_init_filter(scale, scale_param, NULL)) < 0) {
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return ret;
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}
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if ((ret = avfilter_insert_filter(buffer_filter->outputs[0], scale, 0, 0)) < 0) {
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return ret;
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}
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scale->outputs[0]->time_base = scale->inputs[0]->time_base;
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scale->outputs[0]->format= c->pix_fmt;
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} else if (!strcmp(scale->filter->name, "scale")) {
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snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s",
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scale->outputs[0]->w, scale->outputs[0]->h, c->sws_param);
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scale->filter->init(scale, scale_param, NULL);
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}
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c->pix_fmt = scale->inputs[0]->format = picref->format;
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c->w = scale->inputs[0]->w = picref->video->w;
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c->h = scale->inputs[0]->h = picref->video->h;
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link = scale->outputs[0];
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if ((ret = link->srcpad->config_props(link)) < 0)
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return ret;
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}
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buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
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picref->video->w, picref->video->h);
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av_image_copy(buf->data, buf->linesize,
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(void*)picref->data, picref->linesize,
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picref->format, picref->video->w, picref->video->h);
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avfilter_copy_buffer_ref_props(buf, picref);
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if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) {
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avfilter_unref_buffer(buf);
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return ret;
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}
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c->nb_failed_requests = 0;
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return 0;
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}
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int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
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{
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BufferSourceContext *c = s->priv;
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int ret;
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if (!buf) {
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c->eof = 1;
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return 0;
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} else if (c->eof)
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return AVERROR(EINVAL);
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if (!av_fifo_space(c->fifo) &&
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(ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
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sizeof(buf))) < 0)
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return ret;
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// CHECK_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format);
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if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0)
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return ret;
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c->nb_failed_requests = 0;
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return 0;
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}
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#if CONFIG_AVCODEC
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#include "avcodec.h"
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int av_vsrc_buffer_add_frame(AVFilterContext *buffer_src,
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const AVFrame *frame, int flags)
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{
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BufferSourceContext *c = buffer_src->priv;
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AVFilterBufferRef *picref;
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int ret;
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if (!frame) {
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c->eof = 1;
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return 0;
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} else if (c->eof)
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return AVERROR(EINVAL);
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picref = avfilter_get_video_buffer_ref_from_frame(frame, AV_PERM_WRITE);
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if (!picref)
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return AVERROR(ENOMEM);
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ret = av_vsrc_buffer_add_video_buffer_ref(buffer_src, picref, flags);
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picref->buf->data[0] = NULL;
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avfilter_unref_buffer(picref);
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return ret;
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}
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#endif
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unsigned av_vsrc_buffer_get_nb_failed_requests(AVFilterContext *buffer_src)
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{
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return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
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}
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static av_cold int init_video(AVFilterContext *ctx, const char *args, void *opaque)
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{
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BufferSourceContext *c = ctx->priv;
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char pix_fmt_str[128];
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int ret, n = 0;
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*c->sws_param = 0;
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if (!args ||
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(n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str,
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&c->time_base.num, &c->time_base.den,
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&c->sample_aspect_ratio.num, &c->sample_aspect_ratio.den, c->sws_param)) < 7) {
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av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args);
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return AVERROR(EINVAL);
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}
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if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0)
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return ret;
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if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*))))
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return AVERROR(ENOMEM);
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av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d sws_param:%s\n",
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c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
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c->time_base.num, c->time_base.den,
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c->sample_aspect_ratio.num, c->sample_aspect_ratio.den, c->sws_param);
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return 0;
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}
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static av_cold int init_audio(AVFilterContext *ctx, const char *args0, void *opaque)
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{
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BufferSourceContext *abuffer = ctx->priv;
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char *arg = NULL, *ptr, chlayout_str[16];
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char *args = av_strdup(args0);
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int ret;
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arg = av_strtok(args, ":", &ptr);
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#define ADD_FORMAT(fmt_name) \
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if (!arg) \
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goto arg_fail; \
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if ((ret = ff_parse_##fmt_name(&abuffer->fmt_name, arg, ctx)) < 0) { \
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av_freep(&args); \
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return ret; \
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} \
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if (*args) \
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arg = av_strtok(NULL, ":", &ptr)
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ADD_FORMAT(sample_rate);
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ADD_FORMAT(sample_format);
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ADD_FORMAT(channel_layout);
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ADD_FORMAT(packing_format);
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abuffer->fifo = av_fifo_alloc(FIFO_SIZE*sizeof(AVFilterBufferRef*));
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if (!abuffer->fifo) {
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av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo, filter init failed.\n");
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return AVERROR(ENOMEM);
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}
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av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str),
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-1, abuffer->channel_layout);
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av_log(ctx, AV_LOG_INFO, "format:%s layout:%s rate:%d\n",
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av_get_sample_fmt_name(abuffer->sample_format), chlayout_str,
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abuffer->sample_rate);
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av_freep(&args);
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return 0;
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arg_fail:
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av_log(ctx, AV_LOG_ERROR, "Invalid arguments, must be of the form "
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"sample_rate:sample_fmt:channel_layout:packing\n");
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av_freep(&args);
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return AVERROR(EINVAL);
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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BufferSourceContext *s = ctx->priv;
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while (s->fifo && av_fifo_size(s->fifo)) {
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AVFilterBufferRef *buf;
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av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL);
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avfilter_unref_buffer(buf);
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}
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av_fifo_free(s->fifo);
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s->fifo = NULL;
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avfilter_free(s->scale);
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s->scale = NULL;
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}
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static int query_formats_video(AVFilterContext *ctx)
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{
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BufferSourceContext *c = ctx->priv;
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enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
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avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
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return 0;
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}
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static int query_formats_audio(AVFilterContext *ctx)
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{
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BufferSourceContext *abuffer = ctx->priv;
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AVFilterFormats *formats;
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formats = NULL;
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avfilter_add_format(&formats, abuffer->sample_format);
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avfilter_set_common_sample_formats(ctx, formats);
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formats = NULL;
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avfilter_add_format(&formats, abuffer->channel_layout);
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avfilter_set_common_channel_layouts(ctx, formats);
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formats = NULL;
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avfilter_add_format(&formats, abuffer->packing_format);
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avfilter_set_common_packing_formats(ctx, formats);
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return 0;
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}
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static int config_output_video(AVFilterLink *link)
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{
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BufferSourceContext *c = link->src->priv;
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link->w = c->w;
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link->h = c->h;
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link->sample_aspect_ratio = c->sample_aspect_ratio;
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link->time_base = c->time_base;
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return 0;
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}
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static int config_output_audio(AVFilterLink *outlink)
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{
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BufferSourceContext *abuffer = outlink->src->priv;
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outlink->sample_rate = abuffer->sample_rate;
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return 0;
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}
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static int request_frame(AVFilterLink *link)
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{
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BufferSourceContext *c = link->src->priv;
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AVFilterBufferRef *buf;
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if (!av_fifo_size(c->fifo)) {
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if (c->eof)
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return AVERROR_EOF;
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c->nb_failed_requests++;
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return AVERROR(EAGAIN);
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}
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av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL);
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switch (link->type) {
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case AVMEDIA_TYPE_VIDEO:
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/* TODO reindent */
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avfilter_start_frame(link, avfilter_ref_buffer(buf, ~0));
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avfilter_draw_slice(link, 0, link->h, 1);
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avfilter_end_frame(link);
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avfilter_unref_buffer(buf);
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break;
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case AVMEDIA_TYPE_AUDIO:
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avfilter_filter_samples(link, avfilter_ref_buffer(buf, ~0));
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avfilter_unref_buffer(buf);
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break;
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default:
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return AVERROR(ENOSYS);
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}
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return 0;
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}
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static int poll_frame(AVFilterLink *link)
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{
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BufferSourceContext *c = link->src->priv;
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int size = av_fifo_size(c->fifo);
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if (!size && c->eof)
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return AVERROR_EOF;
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return size/sizeof(AVFilterBufferRef*);
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}
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static void buf_free(AVFilterBuffer *ptr)
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{
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av_free(ptr);
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return;
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}
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static void set_link_source(AVFilterContext *src, AVFilterLink *link)
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{
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link->src = src;
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link->srcpad = &(src->output_pads[0]);
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src->outputs[0] = link;
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}
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static int reconfigure_filter(BufferSourceContext *abuffer, AVFilterContext *filt_ctx)
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{
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int ret;
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AVFilterLink * const inlink = filt_ctx->inputs[0];
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AVFilterLink * const outlink = filt_ctx->outputs[0];
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inlink->format = abuffer->sample_format;
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inlink->channel_layout = abuffer->channel_layout;
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inlink->planar = abuffer->packing_format;
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inlink->sample_rate = abuffer->sample_rate;
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filt_ctx->filter->uninit(filt_ctx);
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memset(filt_ctx->priv, 0, filt_ctx->filter->priv_size);
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if ((ret = filt_ctx->filter->init(filt_ctx, NULL , NULL)) < 0)
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return ret;
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if ((ret = inlink->srcpad->config_props(inlink)) < 0)
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return ret;
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return outlink->srcpad->config_props(outlink);
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}
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static int insert_filter(BufferSourceContext *abuffer,
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AVFilterLink *link, AVFilterContext **filt_ctx,
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const char *filt_name)
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{
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int ret;
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if ((ret = avfilter_open(filt_ctx, avfilter_get_by_name(filt_name), NULL)) < 0)
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return ret;
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link->src->outputs[0] = NULL;
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if ((ret = avfilter_link(link->src, 0, *filt_ctx, 0)) < 0) {
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link->src->outputs[0] = link;
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return ret;
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}
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set_link_source(*filt_ctx, link);
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if ((ret = reconfigure_filter(abuffer, *filt_ctx)) < 0) {
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avfilter_free(*filt_ctx);
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return ret;
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}
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return 0;
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}
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static void remove_filter(AVFilterContext **filt_ctx)
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{
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AVFilterLink *outlink = (*filt_ctx)->outputs[0];
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AVFilterContext *src = (*filt_ctx)->inputs[0]->src;
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(*filt_ctx)->outputs[0] = NULL;
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avfilter_free(*filt_ctx);
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*filt_ctx = NULL;
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set_link_source(src, outlink);
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}
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static inline void log_input_change(void *ctx, AVFilterLink *link, AVFilterBufferRef *ref)
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{
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char old_layout_str[16], new_layout_str[16];
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av_get_channel_layout_string(old_layout_str, sizeof(old_layout_str),
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-1, link->channel_layout);
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av_get_channel_layout_string(new_layout_str, sizeof(new_layout_str),
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-1, ref->audio->channel_layout);
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av_log(ctx, AV_LOG_INFO,
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"Audio input format changed: "
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"%s:%s:%d -> %s:%s:%d, normalizing\n",
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av_get_sample_fmt_name(link->format),
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old_layout_str, (int)link->sample_rate,
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av_get_sample_fmt_name(ref->format),
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new_layout_str, ref->audio->sample_rate);
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}
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int av_asrc_buffer_add_audio_buffer_ref(AVFilterContext *ctx,
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AVFilterBufferRef *samplesref,
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int av_unused flags)
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{
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BufferSourceContext *abuffer = ctx->priv;
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AVFilterLink *link;
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int ret, logged = 0;
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if (av_fifo_space(abuffer->fifo) < sizeof(samplesref)) {
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av_log(ctx, AV_LOG_ERROR,
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"Buffering limit reached. Please consume some available frames "
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"before adding new ones.\n");
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return AVERROR(EINVAL);
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}
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// Normalize input
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link = ctx->outputs[0];
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if (samplesref->audio->sample_rate != link->sample_rate) {
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log_input_change(ctx, link, samplesref);
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logged = 1;
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abuffer->sample_rate = samplesref->audio->sample_rate;
|
|
|
|
if (!abuffer->aresample) {
|
|
ret = insert_filter(abuffer, link, &abuffer->aresample, "aresample");
|
|
if (ret < 0) return ret;
|
|
} else {
|
|
link = abuffer->aresample->outputs[0];
|
|
if (samplesref->audio->sample_rate == link->sample_rate)
|
|
remove_filter(&abuffer->aresample);
|
|
else
|
|
if ((ret = reconfigure_filter(abuffer, abuffer->aresample)) < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
link = ctx->outputs[0];
|
|
if (samplesref->format != link->format ||
|
|
samplesref->audio->channel_layout != link->channel_layout ||
|
|
samplesref->audio->planar != link->planar) {
|
|
|
|
if (!logged) log_input_change(ctx, link, samplesref);
|
|
|
|
abuffer->sample_format = samplesref->format;
|
|
abuffer->channel_layout = samplesref->audio->channel_layout;
|
|
abuffer->packing_format = samplesref->audio->planar;
|
|
|
|
if (!abuffer->aconvert) {
|
|
ret = insert_filter(abuffer, link, &abuffer->aconvert, "aconvert");
|
|
if (ret < 0) return ret;
|
|
} else {
|
|
link = abuffer->aconvert->outputs[0];
|
|
if (samplesref->format == link->format &&
|
|
samplesref->audio->channel_layout == link->channel_layout &&
|
|
samplesref->audio->planar == link->planar
|
|
)
|
|
remove_filter(&abuffer->aconvert);
|
|
else
|
|
if ((ret = reconfigure_filter(abuffer, abuffer->aconvert)) < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (sizeof(samplesref) != av_fifo_generic_write(abuffer->fifo, &samplesref,
|
|
sizeof(samplesref), NULL)) {
|
|
av_log(ctx, AV_LOG_ERROR, "Error while writing to FIFO\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int av_asrc_buffer_add_samples(AVFilterContext *ctx,
|
|
uint8_t *data[8], int linesize[8],
|
|
int nb_samples, int sample_rate,
|
|
int sample_fmt, int64_t channel_layout, int planar,
|
|
int64_t pts, int av_unused flags)
|
|
{
|
|
AVFilterBufferRef *samplesref;
|
|
|
|
samplesref = avfilter_get_audio_buffer_ref_from_arrays(
|
|
data, linesize, AV_PERM_WRITE,
|
|
nb_samples,
|
|
sample_fmt, channel_layout, planar);
|
|
if (!samplesref)
|
|
return AVERROR(ENOMEM);
|
|
|
|
samplesref->buf->free = buf_free;
|
|
samplesref->pts = pts;
|
|
samplesref->audio->sample_rate = sample_rate;
|
|
|
|
return av_asrc_buffer_add_audio_buffer_ref(ctx, samplesref, 0);
|
|
}
|
|
|
|
int av_asrc_buffer_add_buffer(AVFilterContext *ctx,
|
|
uint8_t *buf, int buf_size, int sample_rate,
|
|
int sample_fmt, int64_t channel_layout, int planar,
|
|
int64_t pts, int av_unused flags)
|
|
{
|
|
uint8_t *data[8] = {0};
|
|
int linesize[8];
|
|
int nb_channels = av_get_channel_layout_nb_channels(channel_layout),
|
|
nb_samples = buf_size / nb_channels / av_get_bytes_per_sample(sample_fmt);
|
|
|
|
av_samples_fill_arrays(data, linesize,
|
|
buf, nb_channels, nb_samples,
|
|
sample_fmt, 16);
|
|
|
|
return av_asrc_buffer_add_samples(ctx,
|
|
data, linesize, nb_samples,
|
|
sample_rate,
|
|
sample_fmt, channel_layout, planar,
|
|
pts, flags);
|
|
}
|
|
|
|
AVFilter avfilter_vsrc_buffer = {
|
|
.name = "buffer",
|
|
.description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
|
|
.priv_size = sizeof(BufferSourceContext),
|
|
.query_formats = query_formats_video,
|
|
|
|
.init = init_video,
|
|
.uninit = uninit,
|
|
|
|
.inputs = (const AVFilterPad[]) {{ .name = NULL }},
|
|
.outputs = (const AVFilterPad[]) {{ .name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.request_frame = request_frame,
|
|
.poll_frame = poll_frame,
|
|
.config_props = config_output_video, },
|
|
{ .name = NULL}},
|
|
};
|
|
|
|
#ifdef CONFIG_ABUFFER_FILTER
|
|
|
|
AVFilter avfilter_asrc_abuffer = {
|
|
.name = "abuffer",
|
|
.description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
|
|
.priv_size = sizeof(BufferSourceContext),
|
|
.query_formats = query_formats_audio,
|
|
|
|
.init = init_audio,
|
|
.uninit = uninit,
|
|
|
|
.inputs = (const AVFilterPad[]) {{ .name = NULL }},
|
|
.outputs = (const AVFilterPad[]) {{ .name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.request_frame = request_frame,
|
|
.poll_frame = poll_frame,
|
|
.config_props = config_output_audio, },
|
|
{ .name = NULL}},
|
|
};
|
|
|
|
#endif
|