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FFmpeg/libavfilter/vsrc_buffer.c

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/*
* Copyright (c) 2008 Vitor Sessak
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* memory buffer source filter
*/
#include "avfilter.h"
#include "internal.h"
#include "avcodec.h"
#include "buffersrc.h"
#include "vsrc_buffer.h"
#include "libavutil/fifo.h"
#include "libavutil/imgutils.h"
typedef struct {
AVFilterContext *scale;
AVFifoBuffer *fifo;
int h, w;
enum PixelFormat pix_fmt;
AVRational time_base; ///< time_base to set in the output link
AVRational sample_aspect_ratio;
char sws_param[256];
} BufferSourceContext;
#define CHECK_PARAM_CHANGE(s, c, width, height, format)\
if (c->w != width || c->h != height || c->pix_fmt != format) {\
av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
return AVERROR(EINVAL);\
}
int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter,
AVFilterBufferRef *picref, int flags)
{
BufferSourceContext *c = buffer_filter->priv;
AVFilterLink *outlink = buffer_filter->outputs[0];
AVFilterBufferRef *buf;
int ret;
if (!av_fifo_space(c->fifo) &&
(ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
sizeof(buf))) < 0)
return ret;
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;
AVFilterLink *link;
char scale_param[1024];
av_log(buffer_filter, AV_LOG_INFO,
"Buffer video input changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
picref->video->w, picref->video->h, av_pix_fmt_descriptors[picref->format].name);
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if (!scale || strcmp(scale->filter->name, "scale")) {
AVFilter *f = avfilter_get_by_name("scale");
av_log(buffer_filter, AV_LOG_INFO, "Inserting scaler filter\n");
if ((ret = avfilter_open(&scale, f, "Input equalizer")) < 0)
return ret;
c->scale = scale;
snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s", c->w, c->h, c->sws_param);
if ((ret = avfilter_init_filter(scale, scale_param, NULL)) < 0) {
return ret;
}
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if ((ret = avfilter_insert_filter(buffer_filter->outputs[0], scale, 0, 0)) < 0) {
return ret;
}
scale->outputs[0]->time_base = scale->inputs[0]->time_base;
scale->outputs[0]->format= c->pix_fmt;
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} else if (!strcmp(scale->filter->name, "scale")) {
snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s",
scale->outputs[0]->w, scale->outputs[0]->h, c->sws_param);
scale->filter->init(scale, scale_param, NULL);
}
c->pix_fmt = scale->inputs[0]->format = picref->format;
c->w = scale->inputs[0]->w = picref->video->w;
c->h = scale->inputs[0]->h = picref->video->h;
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link = scale->outputs[0];
if ((ret = link->srcpad->config_props(link)) < 0)
return ret;
}
buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
picref->video->w, picref->video->h);
av_image_copy(buf->data, buf->linesize,
(void*)picref->data, picref->linesize,
picref->format, picref->video->w, picref->video->h);
avfilter_copy_buffer_ref_props(buf, picref);
if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) {
avfilter_unref_buffer(buf);
return ret;
}
return 0;
}
int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
{
BufferSourceContext *c = s->priv;
int ret;
if (!av_fifo_space(c->fifo) &&
(ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
sizeof(buf))) < 0)
return ret;
Merge remote-tracking branch 'qatar/master' * qatar/master: (22 commits) rv34: frame-level multi-threading mpegvideo: claim ownership of referenced pictures aacsbr: prevent out of bounds memcpy(). ipmovie: fix pts for CODEC_ID_INTERPLAY_DPCM sierravmd: fix audio pts bethsoftvideo: Use bytestream2 functions to prevent buffer overreads. bmpenc: support for PIX_FMT_RGB444 swscale: fix crash in fast_bilinear code when compiled with -mred-zone. swscale: specify register type. rv34: use get_bits_left() avconv: reinitialize the filtergraph on resolution change. vsrc_buffer: error on changing frame parameters. avconv: fix -copyinkf. fate: Update file checksums after the mov muxer change in a78dbada55d6 movenc: Don't store a nonzero creation time if nothing was set by the caller bmpdec: support for rgb444 with bitfields compression rgb2rgb: allow conversion for <15 bpp doc: fix stray reference to FFmpeg v4l2: use C99 struct initializer v4l2: poll the file descriptor ... Conflicts: avconv.c libavcodec/aacsbr.c libavcodec/bethsoftvideo.c libavcodec/kmvc.c libavdevice/v4l2.c libavfilter/vsrc_buffer.c libswscale/swscale_unscaled.c libswscale/x86/input.asm tests/ref/acodec/alac tests/ref/acodec/pcm_s16be tests/ref/acodec/pcm_s24be tests/ref/acodec/pcm_s32be tests/ref/acodec/pcm_s8 tests/ref/lavf/mov tests/ref/vsynth1/dnxhd_1080i tests/ref/vsynth1/mpeg4 tests/ref/vsynth1/qtrle tests/ref/vsynth1/svq1 tests/ref/vsynth2/dnxhd_1080i tests/ref/vsynth2/mpeg4 tests/ref/vsynth2/qtrle tests/ref/vsynth2/svq1 Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-01-11 04:23:55 +03:00
// CHECK_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format);
if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0)
return ret;
return 0;
}
#if CONFIG_AVCODEC
#include "avcodec.h"
int av_vsrc_buffer_add_frame(AVFilterContext *buffer_src,
const AVFrame *frame, int flags)
{
int ret;
AVFilterBufferRef *picref =
avfilter_get_video_buffer_ref_from_frame(frame, AV_PERM_WRITE);
if (!picref)
return AVERROR(ENOMEM);
ret = av_vsrc_buffer_add_video_buffer_ref(buffer_src, picref, flags);
picref->buf->data[0] = NULL;
avfilter_unref_buffer(picref);
return ret;
}
#endif
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
BufferSourceContext *c = ctx->priv;
char pix_fmt_str[128];
int ret, n = 0;
*c->sws_param = 0;
if (!args ||
(n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str,
&c->time_base.num, &c->time_base.den,
&c->sample_aspect_ratio.num, &c->sample_aspect_ratio.den, c->sws_param)) < 7) {
av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args);
return AVERROR(EINVAL);
}
if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0)
return ret;
if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*))))
return AVERROR(ENOMEM);
av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d sws_param:%s\n",
c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
c->time_base.num, c->time_base.den,
c->sample_aspect_ratio.num, c->sample_aspect_ratio.den, c->sws_param);
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
BufferSourceContext *s = ctx->priv;
while (av_fifo_size(s->fifo)) {
AVFilterBufferRef *buf;
av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL);
avfilter_unref_buffer(buf);
}
av_fifo_free(s->fifo);
s->fifo = NULL;
avfilter_free(s->scale);
s->scale = NULL;
}
static int query_formats(AVFilterContext *ctx)
{
BufferSourceContext *c = ctx->priv;
enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
return 0;
}
static int config_props(AVFilterLink *link)
{
BufferSourceContext *c = link->src->priv;
link->w = c->w;
link->h = c->h;
link->sample_aspect_ratio = c->sample_aspect_ratio;
link->time_base = c->time_base;
return 0;
}
static int request_frame(AVFilterLink *link)
{
BufferSourceContext *c = link->src->priv;
AVFilterBufferRef *buf;
if (!av_fifo_size(c->fifo)) {
av_log(link->src, AV_LOG_WARNING,
"request_frame() called with no available frame!\n");
return AVERROR(EINVAL);
}
av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL);
avfilter_start_frame(link, avfilter_ref_buffer(buf, ~0));
avfilter_draw_slice(link, 0, link->h, 1);
avfilter_end_frame(link);
avfilter_unref_buffer(buf);
return 0;
}
static int poll_frame(AVFilterLink *link)
{
BufferSourceContext *c = link->src->priv;
return !!av_fifo_size(c->fifo);
}
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,
.init = init,
.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_props, },
{ .name = NULL}},
};