2 * Copyright 2007 Bobby Bingham
3 * Copyright Stefano Sabatini <stefasab gmail com>
4 * Copyright Vitor Sessak <vitor1001 gmail com>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "libavutil/avassert.h"
27 #include "libavutil/imgutils.h"
28 #include "libavutil/mem.h"
34 AVFilterBufferRef *ff_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
36 return ff_get_video_buffer(link->dst->outputs[0], perms, w, h);
39 AVFilterBufferRef *ff_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
44 AVFilterBufferRef *picref = NULL;
45 AVFilterPool *pool = link->pool;
46 int full_perms = AV_PERM_READ | AV_PERM_WRITE | AV_PERM_PRESERVE |
47 AV_PERM_REUSE | AV_PERM_REUSE2 | AV_PERM_ALIGN;
49 av_assert1(!(perms & ~(full_perms | AV_PERM_NEG_LINESIZES)));
52 for (i = 0; i < POOL_SIZE; i++) {
53 picref = pool->pic[i];
54 if (picref && picref->buf->format == link->format && picref->buf->w == w && picref->buf->h == h) {
55 AVFilterBuffer *pic = picref->buf;
58 av_assert0(!picref->video->qp_table);
61 picref->perms = full_perms;
62 picref->format = link->format;
64 memcpy(picref->data, pic->data, sizeof(picref->data));
65 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
71 pool = link->pool = av_mallocz(sizeof(AVFilterPool));
75 // align: +2 is needed for swscaler, +16 to be SIMD-friendly
76 if ((i = av_image_alloc(data, linesize, w, h, link->format, 32)) < 0)
79 picref = avfilter_get_video_buffer_ref_from_arrays(data, linesize,
80 full_perms, w, h, link->format);
86 memset(data[0], 128, i);
88 picref->buf->priv = pool;
89 picref->buf->free = NULL;
96 avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,
97 int w, int h, enum AVPixelFormat format)
99 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
100 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
106 picref->buf->free = ff_avfilter_default_free_buffer;
107 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
110 pic->w = picref->video->w = w;
111 pic->h = picref->video->h = h;
113 /* make sure the buffer gets read permission or it's useless for output */
114 picref->perms = perms | AV_PERM_READ;
117 picref->type = AVMEDIA_TYPE_VIDEO;
118 pic->format = picref->format = format;
120 memcpy(pic->data, data, 4*sizeof(data[0]));
121 memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
122 memcpy(picref->data, pic->data, sizeof(picref->data));
123 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
125 pic-> extended_data = pic->data;
126 picref->extended_data = picref->data;
128 picref->pts = AV_NOPTS_VALUE;
133 if (picref && picref->video)
134 av_free(picref->video);
140 AVFilterBufferRef *ff_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
142 AVFilterBufferRef *ret = NULL;
144 av_unused char buf[16];
145 FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0);
146 ff_tlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
148 if (link->dstpad->get_video_buffer)
149 ret = link->dstpad->get_video_buffer(link, perms, w, h);
152 ret = ff_default_get_video_buffer(link, perms, w, h);
155 ret->type = AVMEDIA_TYPE_VIDEO;
157 FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0); ff_tlog(NULL, " returning "); ff_tlog_ref(NULL, ret, 1);
162 // for filters that support (but don't require) outpic==inpic
163 int ff_inplace_start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
165 AVFilterLink *outlink = inlink->dst->outputs[0];
166 AVFilterBufferRef *outpicref = NULL, *for_next_filter;
169 if (inpicref->perms & AV_PERM_WRITE) {
170 outpicref = avfilter_ref_buffer(inpicref, ~0);
172 return AVERROR(ENOMEM);
174 outpicref = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
176 return AVERROR(ENOMEM);
178 avfilter_copy_buffer_ref_props(outpicref, inpicref);
179 outpicref->video->w = outlink->w;
180 outpicref->video->h = outlink->h;
183 for_next_filter = avfilter_ref_buffer(outpicref, ~0);
185 ret = ff_start_frame(outlink, for_next_filter);
187 ret = AVERROR(ENOMEM);
190 avfilter_unref_bufferp(&outpicref);
194 outlink->out_buf = outpicref;
198 static int default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
200 AVFilterLink *outlink = NULL;
202 if (inlink->dst->nb_outputs)
203 outlink = inlink->dst->outputs[0];
205 if (outlink && (inlink->dstpad->start_frame || inlink->dstpad->end_frame || inlink->dstpad->draw_slice)) {
206 AVFilterBufferRef *buf_out;
207 outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
208 if (!outlink->out_buf)
209 return AVERROR(ENOMEM);
211 avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
212 outlink->out_buf->video->w = outlink->w;
213 outlink->out_buf->video->h = outlink->h;
214 buf_out = avfilter_ref_buffer(outlink->out_buf, ~0);
216 return AVERROR(ENOMEM);
218 return ff_start_frame(outlink, buf_out);
223 static void clear_link(AVFilterLink *link)
225 avfilter_unref_bufferp(&link->cur_buf);
226 avfilter_unref_bufferp(&link->src_buf);
227 avfilter_unref_bufferp(&link->out_buf);
228 link->cur_buf_copy = NULL; /* we do not own the reference */
231 /* XXX: should we do the duplicating of the picture ref here, instead of
232 * forcing the source filter to do it? */
233 int ff_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
235 int (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
236 AVFilterPad *src = link->srcpad;
237 AVFilterPad *dst = link->dstpad;
239 AVFilterCommand *cmd= link->dst->command_queue;
242 FF_TPRINTF_START(NULL, start_frame); ff_tlog_link(NULL, link, 0); ff_tlog(NULL, " "); ff_tlog_ref(NULL, picref, 1);
244 if (strcmp(link->dst->filter->name, "scale")) {
245 av_assert1(picref->format == link->format);
246 av_assert1(picref->video->w == link->w);
247 av_assert1(picref->video->h == link->h);
251 avfilter_unref_buffer(picref);
255 if (!(start_frame = dst->start_frame))
256 start_frame = default_start_frame;
258 av_assert1((picref->perms & src->min_perms) == src->min_perms);
259 picref->perms &= ~ src->rej_perms;
260 perms = picref->perms;
262 if (picref->linesize[0] < 0)
263 perms |= AV_PERM_NEG_LINESIZES;
264 /* prepare to copy the picture if it has insufficient permissions */
265 if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
266 av_log(link->dst, AV_LOG_DEBUG,
267 "frame copy needed (have perms %x, need %x, reject %x)\n",
269 link->dstpad->min_perms, link->dstpad->rej_perms);
271 link->cur_buf = ff_get_video_buffer(link, dst->min_perms, link->w, link->h);
272 if (!link->cur_buf) {
273 avfilter_unref_bufferp(&picref);
274 return AVERROR(ENOMEM);
277 link->src_buf = picref;
278 avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
280 /* copy palette if required */
281 if (av_pix_fmt_desc_get(link->format)->flags & PIX_FMT_PAL)
282 memcpy(link->cur_buf->data[1], link->src_buf-> data[1], AVPALETTE_SIZE);
285 link->cur_buf = picref;
287 link->cur_buf_copy = link->cur_buf;
289 while(cmd && cmd->time <= picref->pts * av_q2d(link->time_base)){
290 av_log(link->dst, AV_LOG_DEBUG,
291 "Processing command time:%f command:%s arg:%s\n",
292 cmd->time, cmd->command, cmd->arg);
293 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
294 ff_command_queue_pop(link->dst);
295 cmd= link->dst->command_queue;
297 pts = link->cur_buf->pts;
298 ret = start_frame(link, link->cur_buf);
299 ff_update_link_current_pts(link, pts);
303 /* incoming buffers must not be freed in start frame,
304 because they can still be in use by the automatic copy mechanism */
305 av_assert1(link->cur_buf_copy->buf->refcount > 0);
310 static int default_end_frame(AVFilterLink *inlink)
312 AVFilterLink *outlink = NULL;
314 if (inlink->dst->nb_outputs)
315 outlink = inlink->dst->outputs[0];
318 if (inlink->dstpad->filter_frame) {
319 int ret = inlink->dstpad->filter_frame(inlink, inlink->cur_buf);
320 inlink->cur_buf = NULL;
322 } else if (inlink->dstpad->start_frame || inlink->dstpad->end_frame || inlink->dstpad->draw_slice){
323 return ff_end_frame(outlink);
325 int ret = ff_filter_frame(outlink, inlink->cur_buf);
326 inlink->cur_buf = NULL;
333 int ff_end_frame(AVFilterLink *link)
335 int (*end_frame)(AVFilterLink *);
338 if (!(end_frame = link->dstpad->end_frame))
339 end_frame = default_end_frame;
341 ret = end_frame(link);
348 static int default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
350 AVFilterLink *outlink = NULL;
352 if (inlink->dst->nb_outputs)
353 outlink = inlink->dst->outputs[0];
355 if (outlink && (inlink->dstpad->start_frame || inlink->dstpad->end_frame || inlink->dstpad->draw_slice))
356 return ff_draw_slice(outlink, y, h, slice_dir);
360 int ff_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
362 uint8_t *src[4], *dst[4];
364 int (*draw_slice)(AVFilterLink *, int, int, int);
366 FF_TPRINTF_START(NULL, draw_slice); ff_tlog_link(NULL, link, 0); ff_tlog(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);
368 /* copy the slice if needed for permission reasons */
370 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
371 vsub = desc->log2_chroma_h;
373 for (i = 0; i < 4; i++) {
374 if (link->src_buf->data[i]) {
375 src[i] = link->src_buf-> data[i] +
376 (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
377 dst[i] = link->cur_buf_copy->data[i] +
378 (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf_copy->linesize[i];
380 src[i] = dst[i] = NULL;
383 for (i = 0; i < 4; i++) {
385 av_image_get_linesize(link->format, link->cur_buf_copy->video->w, i);
387 if (!src[i]) continue;
389 for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
390 memcpy(dst[i], src[i], planew);
391 src[i] += link->src_buf->linesize[i];
392 dst[i] += link->cur_buf_copy->linesize[i];
397 if (!(draw_slice = link->dstpad->draw_slice))
398 draw_slice = default_draw_slice;
399 ret = draw_slice(link, y, h, slice_dir);
403 /* incoming buffers must not be freed in start frame,
404 because they can still be in use by the automatic copy mechanism */
405 av_assert1(link->cur_buf_copy->buf->refcount > 0);