* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <string.h>
+#include <stdio.h>
+
+#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
+#include "libavutil/mem.h"
#include "avfilter.h"
#include "internal.h"
int i;
AVFilterBufferRef *picref = NULL;
AVFilterPool *pool = link->pool;
+ int full_perms = AV_PERM_READ | AV_PERM_WRITE | AV_PERM_PRESERVE |
+ AV_PERM_REUSE | AV_PERM_REUSE2 | AV_PERM_ALIGN;
+
+ av_assert1(!(perms & ~(full_perms | AV_PERM_NEG_LINESIZES)));
if (pool) {
for (i = 0; i < POOL_SIZE; i++) {
pool->count--;
picref->video->w = w;
picref->video->h = h;
- picref->perms = perms | AV_PERM_READ;
+ picref->perms = full_perms;
picref->format = link->format;
pic->refcount = 1;
memcpy(picref->data, pic->data, sizeof(picref->data));
return NULL;
picref = avfilter_get_video_buffer_ref_from_arrays(data, linesize,
- perms, w, h, link->format);
+ full_perms, w, h, link->format);
if (!picref) {
av_free(data[0]);
return NULL;
return ff_start_frame(link->dst->outputs[0], buf_out);
}
+// for filters that support (but don't require) outpic==inpic
+int ff_inplace_start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
+{
+ AVFilterLink *outlink = inlink->dst->outputs[0];
+ AVFilterBufferRef *outpicref = NULL, *for_next_filter;
+ int ret = 0;
+
+ if (inpicref->perms & AV_PERM_WRITE) {
+ outpicref = avfilter_ref_buffer(inpicref, ~0);
+ if (!outpicref)
+ return AVERROR(ENOMEM);
+ } else {
+ outpicref = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
+ if (!outpicref)
+ return AVERROR(ENOMEM);
+
+ avfilter_copy_buffer_ref_props(outpicref, inpicref);
+ outpicref->video->w = outlink->w;
+ outpicref->video->h = outlink->h;
+ }
+
+ for_next_filter = avfilter_ref_buffer(outpicref, ~0);
+ if (for_next_filter)
+ ret = ff_start_frame(outlink, for_next_filter);
+ else
+ ret = AVERROR(ENOMEM);
+
+ if (ret < 0) {
+ avfilter_unref_bufferp(&outpicref);
+ return ret;
+ }
+
+ outlink->out_buf = outpicref;
+ return 0;
+}
+
static int default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
{
AVFilterLink *outlink = NULL;
avfilter_unref_bufferp(&link->cur_buf);
avfilter_unref_bufferp(&link->src_buf);
avfilter_unref_bufferp(&link->out_buf);
+ link->cur_buf_copy = NULL; /* we do not own the reference */
}
/* XXX: should we do the duplicating of the picture ref here, instead of
int ff_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
{
int (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
+ AVFilterPad *src = link->srcpad;
AVFilterPad *dst = link->dstpad;
- int ret, perms = picref->perms;
+ int ret, perms;
AVFilterCommand *cmd= link->dst->command_queue;
int64_t pts;
FF_TPRINTF_START(NULL, start_frame); ff_tlog_link(NULL, link, 0); ff_tlog(NULL, " "); ff_tlog_ref(NULL, picref, 1);
+ if (link->closed) {
+ avfilter_unref_buffer(picref);
+ return AVERROR_EOF;
+ }
+
if (!(start_frame = dst->start_frame))
start_frame = default_start_frame;
+ av_assert1((picref->perms & src->min_perms) == src->min_perms);
+ picref->perms &= ~ src->rej_perms;
+ perms = picref->perms;
+
if (picref->linesize[0] < 0)
perms |= AV_PERM_NEG_LINESIZES;
/* prepare to copy the picture if it has insufficient permissions */
else
link->cur_buf = picref;
+ link->cur_buf_copy = link->cur_buf;
+
while(cmd && cmd->time <= picref->pts * av_q2d(link->time_base)){
av_log(link->dst, AV_LOG_DEBUG,
"Processing command time:%f command:%s arg:%s\n",
}
pts = link->cur_buf->pts;
ret = start_frame(link, link->cur_buf);
- ff_update_link_current_pts(link,link->cur_buf ? link->cur_buf->pts : pts);
+ ff_update_link_current_pts(link, pts);
if (ret < 0)
clear_link(link);
+ else
+ /* incoming buffers must not be freed in start frame,
+ because they can still be in use by the automatic copy mechanism */
+ av_assert1(link->cur_buf_copy->buf->refcount > 0);
return ret;
}
-int ff_null_start_frame_keep_ref(AVFilterLink *inlink,
- AVFilterBufferRef *picref)
-{
- return ff_start_frame(inlink->dst->outputs[0], avfilter_ref_buffer(picref, ~0));
-}
-
int ff_null_end_frame(AVFilterLink *link)
{
return ff_end_frame(link->dst->outputs[0]);
if (link->src_buf->data[i]) {
src[i] = link->src_buf-> data[i] +
(y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
- dst[i] = link->cur_buf->data[i] +
- (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
+ dst[i] = link->cur_buf_copy->data[i] +
+ (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf_copy->linesize[i];
} else
src[i] = dst[i] = NULL;
}
for (i = 0; i < 4; i++) {
int planew =
- av_image_get_linesize(link->format, link->cur_buf->video->w, i);
+ av_image_get_linesize(link->format, link->cur_buf_copy->video->w, i);
if (!src[i]) continue;
for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
memcpy(dst[i], src[i], planew);
src[i] += link->src_buf->linesize[i];
- dst[i] += link->cur_buf->linesize[i];
+ dst[i] += link->cur_buf_copy->linesize[i];
}
}
}
ret = draw_slice(link, y, h, slice_dir);
if (ret < 0)
clear_link(link);
+ else
+ /* incoming buffers must not be freed in start frame,
+ because they can still be in use by the automatic copy mechanism */
+ av_assert1(link->cur_buf_copy->buf->refcount > 0);
return ret;
}
projects / ffmpeg / blobdiff