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Code Issues Releases Activity

vsrc_buffer: allow buffering arbitrary number of frames.

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This commit is contained in:
Anton Khirnov
2012-03-29 11:22:40 +02:00
parent 416fd90ead
commit 95587d29d7
1 changed files with 42 additions and 30 deletions
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72
libavfilter/vsrc_buffer.c
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@@ -26,10 +26,11 @@
#include "avfilter.h"
#include "buffersrc.h"
#include "vsrc_buffer.h"
#include "libavutil/fifo.h"
#include "libavutil/imgutils.h"
typedef struct {
AVFilterBufferRef *buf;
AVFifoBuffer *fifo;
int h, w;
enum PixelFormat pix_fmt;
AVRational time_base; ///< time_base to set in the output link
@@ -46,25 +47,29 @@ int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
int64_t pts, AVRational pixel_aspect)
{
BufferSourceContext *c = buffer_filter->priv;
AVFilterBufferRef *buf;
int ret;
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;
}
if (!av_fifo_space(c->fifo) &&
(ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
sizeof(buf))) < 0)
return ret;
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,
buf = avfilter_get_video_buffer(buffer_filter->outputs[0], AV_PERM_WRITE,
c->w, c->h);
av_image_copy(buf->data, 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;
avfilter_copy_frame_props(buf, frame);
buf->pts = pts;
buf->video->pixel_aspect = pixel_aspect;
if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) {
avfilter_unref_buffer(buf);
return ret;
}
return 0;
}
@@ -72,18 +77,17 @@ int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
{
BufferSourceContext *c = s->priv;
int ret;
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);
}
if (!av_fifo_space(c->fifo) &&
(ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
sizeof(buf))) < 0)
return ret;
CHECK_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format);
c->buf = buf;
if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0)
return ret;
return 0;
}
@@ -110,6 +114,9 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
}
}
if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*))))
return AVERROR(ENOMEM);
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;
}
@@ -117,9 +124,13 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
static av_cold void uninit(AVFilterContext *ctx)
{
BufferSourceContext *s = ctx->priv;
if (s->buf)
avfilter_unref_buffer(s->buf);
s->buf = NULL;
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;
}
static int query_formats(AVFilterContext *ctx)
@@ -146,18 +157,19 @@ static int config_props(AVFilterLink *link)
static int request_frame(AVFilterLink *link)
{
BufferSourceContext *c = link->src->priv;
AVFilterBufferRef *buf;
if (!c->buf) {
if (!av_fifo_size(c->fifo)) {
av_log(link->src, AV_LOG_ERROR,
"request_frame() called with no available frame!\n");
//return -1;
}
av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL);
avfilter_start_frame(link, avfilter_ref_buffer(c->buf, ~0));
avfilter_start_frame(link, avfilter_ref_buffer(buf, ~0));
avfilter_draw_slice(link, 0, link->h, 1);
avfilter_end_frame(link);
avfilter_unref_buffer(c->buf);
c->buf = NULL;
avfilter_unref_buffer(buf);
return 0;
}
@@ -165,7 +177,7 @@ static int request_frame(AVFilterLink *link)
static int poll_frame(AVFilterLink *link)
{
BufferSourceContext *c = link->src->priv;
return !!c->buf;
return !!av_fifo_size(c->fifo);
}
AVFilter avfilter_vsrc_buffer = {