2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #include "libavutil/imgutils.h"
24 static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
26 snprintf(buf, buf_size, "%s%s%s%s%s%s",
27 perms & AV_PERM_READ ? "r" : "",
28 perms & AV_PERM_WRITE ? "w" : "",
29 perms & AV_PERM_PRESERVE ? "p" : "",
30 perms & AV_PERM_REUSE ? "u" : "",
31 perms & AV_PERM_REUSE2 ? "U" : "",
32 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
36 static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
38 av_unused char buf[16];
40 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
41 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
42 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
46 av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
47 ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,
48 ref->video->w, ref->video->h,
49 !ref->video->interlaced ? 'P' : /* Progressive */
50 ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
51 ref->video->key_frame,
52 av_get_picture_type_char(ref->video->pict_type));
55 av_dlog(ctx, " cl:%"PRId64"d n:%d r:%d p:%d",
56 ref->audio->channel_layout,
57 ref->audio->nb_samples,
58 ref->audio->sample_rate,
62 av_dlog(ctx, "]%s", end ? "\n" : "");
65 AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
67 return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
70 AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
75 AVFilterBufferRef *picref = NULL;
76 AVFilterPool *pool = link->pool;
79 for (i = 0; i < POOL_SIZE; i++) {
80 picref = pool->pic[i];
81 if (picref && picref->buf->format == link->format && picref->buf->w == w && picref->buf->h == h) {
82 AVFilterBuffer *pic = picref->buf;
87 picref->perms = perms | AV_PERM_READ;
88 picref->format = link->format;
90 memcpy(picref->data, pic->data, sizeof(picref->data));
91 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
97 pool = link->pool = av_mallocz(sizeof(AVFilterPool));
101 // align: +2 is needed for swscaler, +16 to be SIMD-friendly
102 if ((i = av_image_alloc(data, linesize, w, h, link->format, 32)) < 0)
105 picref = avfilter_get_video_buffer_ref_from_arrays(data, linesize,
106 perms, w, h, link->format);
112 memset(data[0], 128, i);
114 picref->buf->priv = pool;
115 picref->buf->free = NULL;
122 avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,
123 int w, int h, enum PixelFormat format)
125 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
126 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
132 picref->buf->free = ff_avfilter_default_free_buffer;
133 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
136 pic->w = picref->video->w = w;
137 pic->h = picref->video->h = h;
139 /* make sure the buffer gets read permission or it's useless for output */
140 picref->perms = perms | AV_PERM_READ;
143 picref->type = AVMEDIA_TYPE_VIDEO;
144 pic->format = picref->format = format;
146 memcpy(pic->data, data, 4*sizeof(data[0]));
147 memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
148 memcpy(picref->data, pic->data, sizeof(picref->data));
149 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
151 pic-> extended_data = pic->data;
152 picref->extended_data = picref->data;
157 if (picref && picref->video)
158 av_free(picref->video);
164 AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
166 AVFilterBufferRef *ret = NULL;
168 av_unused char buf[16];
169 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
170 av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
172 if (link->dstpad->get_video_buffer)
173 ret = link->dstpad->get_video_buffer(link, perms, w, h);
176 ret = avfilter_default_get_video_buffer(link, perms, w, h);
179 ret->type = AVMEDIA_TYPE_VIDEO;
181 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
186 void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
188 avfilter_start_frame(link->dst->outputs[0], picref);
191 void avfilter_default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
193 AVFilterLink *outlink = NULL;
195 if (inlink->dst->output_count)
196 outlink = inlink->dst->outputs[0];
199 outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
200 avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
201 avfilter_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
205 /* XXX: should we do the duplicating of the picture ref here, instead of
206 * forcing the source filter to do it? */
207 void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
209 void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
210 AVFilterPad *dst = link->dstpad;
211 int perms = picref->perms;
212 AVFilterCommand *cmd= link->dst->command_queue;
214 FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
216 if (!(start_frame = dst->start_frame))
217 start_frame = avfilter_default_start_frame;
219 if (picref->linesize[0] < 0)
220 perms |= AV_PERM_NEG_LINESIZES;
221 /* prepare to copy the picture if it has insufficient permissions */
222 if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
223 av_log(link->dst, AV_LOG_DEBUG,
224 "frame copy needed (have perms %x, need %x, reject %x)\n",
226 link->dstpad->min_perms, link->dstpad->rej_perms);
228 link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
229 link->src_buf = picref;
230 avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
233 link->cur_buf = picref;
235 while(cmd && cmd->time <= picref->pts * av_q2d(link->time_base)){
236 av_log(link->dst, AV_LOG_DEBUG,
237 "Processing command time:%f command:%s arg:%s\n",
238 cmd->time, cmd->command, cmd->arg);
239 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
240 ff_command_queue_pop(link->dst);
241 cmd= link->dst->command_queue;
244 start_frame(link, link->cur_buf);
245 ff_update_link_current_pts(link, link->cur_buf->pts);
248 void avfilter_null_end_frame(AVFilterLink *link)
250 avfilter_end_frame(link->dst->outputs[0]);
253 void avfilter_default_end_frame(AVFilterLink *inlink)
255 AVFilterLink *outlink = NULL;
257 if (inlink->dst->output_count)
258 outlink = inlink->dst->outputs[0];
260 avfilter_unref_buffer(inlink->cur_buf);
261 inlink->cur_buf = NULL;
264 if (outlink->out_buf) {
265 avfilter_unref_buffer(outlink->out_buf);
266 outlink->out_buf = NULL;
268 avfilter_end_frame(outlink);
272 void avfilter_end_frame(AVFilterLink *link)
274 void (*end_frame)(AVFilterLink *);
276 if (!(end_frame = link->dstpad->end_frame))
277 end_frame = avfilter_default_end_frame;
281 /* unreference the source picture if we're feeding the destination filter
282 * a copied version dues to permission issues */
284 avfilter_unref_buffer(link->src_buf);
285 link->src_buf = NULL;
289 void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
291 avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
294 void avfilter_default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
296 AVFilterLink *outlink = NULL;
298 if (inlink->dst->output_count)
299 outlink = inlink->dst->outputs[0];
302 avfilter_draw_slice(outlink, y, h, slice_dir);
305 void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
307 uint8_t *src[4], *dst[4];
309 void (*draw_slice)(AVFilterLink *, int, int, int);
311 FF_DPRINTF_START(NULL, draw_slice); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);
313 /* copy the slice if needed for permission reasons */
315 vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
317 for (i = 0; i < 4; i++) {
318 if (link->src_buf->data[i]) {
319 src[i] = link->src_buf-> data[i] +
320 (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
321 dst[i] = link->cur_buf->data[i] +
322 (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
324 src[i] = dst[i] = NULL;
327 for (i = 0; i < 4; i++) {
329 av_image_get_linesize(link->format, link->cur_buf->video->w, i);
331 if (!src[i]) continue;
333 for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
334 memcpy(dst[i], src[i], planew);
335 src[i] += link->src_buf->linesize[i];
336 dst[i] += link->cur_buf->linesize[i];
341 if (!(draw_slice = link->dstpad->draw_slice))
342 draw_slice = avfilter_default_draw_slice;
343 draw_slice(link, y, h, slice_dir);