/*
- * Memory buffer source filter
* Copyright (c) 2008 Vitor Sessak
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; 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 "buffersrc.h"
#include "vsrc_buffer.h"
+#include "libavutil/imgutils.h"
typedef struct {
- int64_t pts;
- AVFrame frame;
- int has_frame;
- int h, w, pix_fmt;
+ AVFilterBufferRef *buf;
+ int h, w;
+ enum PixelFormat pix_fmt;
+ AVRational time_base; ///< time_base to set in the output link
AVRational pixel_aspect;
} 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_frame(AVFilterContext *buffer_filter, AVFrame *frame,
int64_t pts, AVRational pixel_aspect)
{
BufferSourceContext *c = buffer_filter->priv;
- if (c->has_frame) {
+ if (c->buf) {
av_log(buffer_filter, AV_LOG_ERROR,
"Buffering several frames is not supported. "
"Please consume all available frames before adding a new one.\n"
//return -1;
}
- memcpy(c->frame.data , frame->data , sizeof(frame->data));
- memcpy(c->frame.linesize, frame->linesize, sizeof(frame->linesize));
- c->pts = pts;
- c->pixel_aspect = pixel_aspect;
- c->has_frame = 1;
+ CHECK_PARAM_CHANGE(buffer_filter, c, frame->width, frame->height, frame->format);
+
+ c->buf = avfilter_get_video_buffer(buffer_filter->outputs[0], AV_PERM_WRITE,
+ c->w, c->h);
+ av_image_copy(c->buf->data, c->buf->linesize, frame->data, frame->linesize,
+ c->pix_fmt, c->w, c->h);
+
+ avfilter_copy_frame_props(c->buf, frame);
+ c->buf->pts = pts;
+ c->buf->video->pixel_aspect = pixel_aspect;
+
+ return 0;
+}
+
+int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
+{
+ BufferSourceContext *c = s->priv;
+
+ if (c->buf) {
+ av_log(s, AV_LOG_ERROR,
+ "Buffering several frames is not supported. "
+ "Please consume all available frames before adding a new one.\n"
+ );
+ return AVERROR(EINVAL);
+ }
+
+ CHECK_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format);
+
+ c->buf = buf;
return 0;
}
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
BufferSourceContext *c = ctx->priv;
+ char pix_fmt_str[128];
+ int n = 0;
+
+ if (!args ||
+ (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d", &c->w, &c->h, pix_fmt_str,
+ &c->time_base.num, &c->time_base.den,
+ &c->pixel_aspect.num, &c->pixel_aspect.den)) != 7) {
+ av_log(ctx, AV_LOG_ERROR, "Expected 7 arguments, but %d found in '%s'\n", n, args);
+ return AVERROR(EINVAL);
+ }
+ if ((c->pix_fmt = av_get_pix_fmt(pix_fmt_str)) == PIX_FMT_NONE) {
+ char *tail;
+ c->pix_fmt = strtol(pix_fmt_str, &tail, 10);
+ if (*tail || c->pix_fmt < 0 || c->pix_fmt >= PIX_FMT_NB) {
+ av_log(ctx, AV_LOG_ERROR, "Invalid pixel format string '%s'\n", pix_fmt_str);
+ return AVERROR(EINVAL);
+ }
+ }
- if(args && sscanf(args, "%d:%d:%d", &c->w, &c->h, &c->pix_fmt) == 3)
- return 0;
+ av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s\n", c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name);
+ return 0;
+}
- av_log(ctx, AV_LOG_ERROR, "init() expected 3 arguments:'%s'\n", args);
- return -1;
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ BufferSourceContext *s = ctx->priv;
+ if (s->buf)
+ avfilter_unref_buffer(s->buf);
+ s->buf = NULL;
}
static int query_formats(AVFilterContext *ctx)
link->w = c->w;
link->h = c->h;
+ link->sample_aspect_ratio = c->pixel_aspect;
+ link->time_base = c->time_base;
return 0;
}
-
static int request_frame(AVFilterLink *link)
{
BufferSourceContext *c = link->src->priv;
- AVFilterPicRef *picref;
- if (!c->has_frame) {
+ if (!c->buf) {
av_log(link->src, AV_LOG_ERROR,
"request_frame() called with no available frame!\n");
//return -1;
}
- /* This picture will be needed unmodified later for decoding the next
- * frame */
- picref = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
- AV_PERM_REUSE2,
- link->w, link->h);
-
- av_picture_copy((AVPicture *)&picref->data, (AVPicture *)&c->frame,
- picref->pic->format, link->w, link->h);
-
- picref->pts = c->pts;
- picref->pixel_aspect = c->pixel_aspect;
- avfilter_start_frame(link, avfilter_ref_pic(picref, ~0));
+ avfilter_start_frame(link, avfilter_ref_buffer(c->buf, ~0));
avfilter_draw_slice(link, 0, link->h, 1);
avfilter_end_frame(link);
- avfilter_unref_pic(picref);
-
- c->has_frame = 0;
+ avfilter_unref_buffer(c->buf);
+ c->buf = NULL;
return 0;
}
static int poll_frame(AVFilterLink *link)
{
BufferSourceContext *c = link->src->priv;
- return !!(c->has_frame);
+ return !!c->buf;
}
-AVFilter avfilter_vsrc_buffer =
-{
+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 = (AVFilterPad[]) {{ .name = NULL }},
.outputs = (AVFilterPad[]) {{ .name = "default",
projects / ffmpeg / blobdiff