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00024 #include "libavutil/pixdesc.h"
00025 #include "libavutil/rational.h"
00026 #include "libavutil/audioconvert.h"
00027 #include "libavutil/imgutils.h"
00028 #include "libavcodec/avcodec.h"
00029 #include "avfilter.h"
00030 #include "internal.h"
00031
00032 unsigned avfilter_version(void) {
00033 return LIBAVFILTER_VERSION_INT;
00034 }
00035
00036 const char *avfilter_configuration(void)
00037 {
00038 return LIBAV_CONFIGURATION;
00039 }
00040
00041 const char *avfilter_license(void)
00042 {
00043 #define LICENSE_PREFIX "libavfilter license: "
00044 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
00045 }
00046
00047 AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
00048 {
00049 AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
00050 if (!ret)
00051 return NULL;
00052 *ret = *ref;
00053 if (ref->type == AVMEDIA_TYPE_VIDEO) {
00054 ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
00055 if (!ret->video) {
00056 av_free(ret);
00057 return NULL;
00058 }
00059 *ret->video = *ref->video;
00060 } else if (ref->type == AVMEDIA_TYPE_AUDIO) {
00061 ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
00062 if (!ret->audio) {
00063 av_free(ret);
00064 return NULL;
00065 }
00066 *ret->audio = *ref->audio;
00067 }
00068 ret->perms &= pmask;
00069 ret->buf->refcount ++;
00070 return ret;
00071 }
00072
00073 void avfilter_unref_buffer(AVFilterBufferRef *ref)
00074 {
00075 if (!ref)
00076 return;
00077 if (!(--ref->buf->refcount))
00078 ref->buf->free(ref->buf);
00079 av_free(ref->video);
00080 av_free(ref->audio);
00081 av_free(ref);
00082 }
00083
00084 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
00085 AVFilterPad **pads, AVFilterLink ***links,
00086 AVFilterPad *newpad)
00087 {
00088 unsigned i;
00089
00090 idx = FFMIN(idx, *count);
00091
00092 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
00093 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
00094 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
00095 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
00096 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
00097 (*links)[idx] = NULL;
00098
00099 (*count)++;
00100 for (i = idx+1; i < *count; i++)
00101 if (*links[i])
00102 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
00103 }
00104
00105 int avfilter_link(AVFilterContext *src, unsigned srcpad,
00106 AVFilterContext *dst, unsigned dstpad)
00107 {
00108 AVFilterLink *link;
00109
00110 if (src->output_count <= srcpad || dst->input_count <= dstpad ||
00111 src->outputs[srcpad] || dst->inputs[dstpad])
00112 return -1;
00113
00114 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
00115 av_log(src, AV_LOG_ERROR,
00116 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
00117 src->name, srcpad, dst->name, dstpad);
00118 return AVERROR(EINVAL);
00119 }
00120
00121 src->outputs[srcpad] =
00122 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
00123
00124 link->src = src;
00125 link->dst = dst;
00126 link->srcpad = &src->output_pads[srcpad];
00127 link->dstpad = &dst->input_pads[dstpad];
00128 link->type = src->output_pads[srcpad].type;
00129 assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
00130 link->format = -1;
00131
00132 return 0;
00133 }
00134
00135 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
00136 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
00137 {
00138 int ret;
00139 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
00140
00141 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "
00142 "between the filter '%s' and the filter '%s'\n",
00143 filt->name, link->src->name, link->dst->name);
00144
00145 link->dst->inputs[dstpad_idx] = NULL;
00146 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
00147
00148 link->dst->inputs[dstpad_idx] = link;
00149 return ret;
00150 }
00151
00152
00153 link->dst = filt;
00154 link->dstpad = &filt->input_pads[filt_srcpad_idx];
00155 filt->inputs[filt_srcpad_idx] = link;
00156
00157
00158
00159 if (link->out_formats)
00160 avfilter_formats_changeref(&link->out_formats,
00161 &filt->outputs[filt_dstpad_idx]->out_formats);
00162
00163 return 0;
00164 }
00165
00166 int avfilter_config_links(AVFilterContext *filter)
00167 {
00168 int (*config_link)(AVFilterLink *);
00169 unsigned i;
00170 int ret;
00171
00172 for (i = 0; i < filter->input_count; i ++) {
00173 AVFilterLink *link = filter->inputs[i];
00174
00175 if (!link) continue;
00176
00177 switch (link->init_state) {
00178 case AVLINK_INIT:
00179 continue;
00180 case AVLINK_STARTINIT:
00181 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
00182 return 0;
00183 case AVLINK_UNINIT:
00184 link->init_state = AVLINK_STARTINIT;
00185
00186 if ((ret = avfilter_config_links(link->src)) < 0)
00187 return ret;
00188
00189 if (!(config_link = link->srcpad->config_props))
00190 config_link = avfilter_default_config_output_link;
00191 if ((ret = config_link(link)) < 0)
00192 return ret;
00193
00194 if (link->time_base.num == 0 && link->time_base.den == 0)
00195 link->time_base = link->src && link->src->input_count ?
00196 link->src->inputs[0]->time_base : AV_TIME_BASE_Q;
00197
00198 if (link->sample_aspect_ratio.num == 0 && link->sample_aspect_ratio.den == 0)
00199 link->sample_aspect_ratio = link->src->input_count ?
00200 link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1};
00201
00202 if (link->sample_rate == 0 && link->src && link->src->input_count)
00203 link->sample_rate = link->src->inputs[0]->sample_rate;
00204
00205 if (link->channel_layout == 0 && link->src && link->src->input_count)
00206 link->channel_layout = link->src->inputs[0]->channel_layout;
00207
00208 if ((config_link = link->dstpad->config_props))
00209 if ((ret = config_link(link)) < 0)
00210 return ret;
00211
00212 link->init_state = AVLINK_INIT;
00213 }
00214 }
00215
00216 return 0;
00217 }
00218
00219 #ifdef DEBUG
00220 static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
00221 {
00222 snprintf(buf, buf_size, "%s%s%s%s%s%s",
00223 perms & AV_PERM_READ ? "r" : "",
00224 perms & AV_PERM_WRITE ? "w" : "",
00225 perms & AV_PERM_PRESERVE ? "p" : "",
00226 perms & AV_PERM_REUSE ? "u" : "",
00227 perms & AV_PERM_REUSE2 ? "U" : "",
00228 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
00229 return buf;
00230 }
00231 #endif
00232
00233 static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
00234 {
00235 av_unused char buf[16];
00236 av_dlog(ctx,
00237 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
00238 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
00239 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
00240 ref->pts, ref->pos);
00241
00242 if (ref->video) {
00243 av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
00244 ref->video->pixel_aspect.num, ref->video->pixel_aspect.den,
00245 ref->video->w, ref->video->h,
00246 !ref->video->interlaced ? 'P' :
00247 ref->video->top_field_first ? 'T' : 'B',
00248 ref->video->key_frame,
00249 av_get_picture_type_char(ref->video->pict_type));
00250 }
00251 if (ref->audio) {
00252 av_dlog(ctx, " cl:%"PRId64"d sn:%d s:%d sr:%d p:%d",
00253 ref->audio->channel_layout,
00254 ref->audio->nb_samples,
00255 ref->audio->size,
00256 ref->audio->sample_rate,
00257 ref->audio->planar);
00258 }
00259
00260 av_dlog(ctx, "]%s", end ? "\n" : "");
00261 }
00262
00263 static void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
00264 {
00265 if (link->type == AVMEDIA_TYPE_VIDEO) {
00266 av_dlog(ctx,
00267 "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
00268 link, link->w, link->h,
00269 av_pix_fmt_descriptors[link->format].name,
00270 link->src ? link->src->filter->name : "",
00271 link->dst ? link->dst->filter->name : "",
00272 end ? "\n" : "");
00273 } else {
00274 char buf[128];
00275 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
00276
00277 av_dlog(ctx,
00278 "link[%p r:%"PRId64" cl:%s fmt:%-16s %-16s->%-16s]%s",
00279 link, link->sample_rate, buf,
00280 av_get_sample_fmt_name(link->format),
00281 link->src ? link->src->filter->name : "",
00282 link->dst ? link->dst->filter->name : "",
00283 end ? "\n" : "");
00284 }
00285 }
00286
00287 #define FF_DPRINTF_START(ctx, func) av_dlog(NULL, "%-16s: ", #func)
00288
00289 AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
00290 {
00291 AVFilterBufferRef *ret = NULL;
00292
00293 av_unused char buf[16];
00294 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
00295 av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
00296
00297 if (link->dstpad->get_video_buffer)
00298 ret = link->dstpad->get_video_buffer(link, perms, w, h);
00299
00300 if (!ret)
00301 ret = avfilter_default_get_video_buffer(link, perms, w, h);
00302
00303 if (ret)
00304 ret->type = AVMEDIA_TYPE_VIDEO;
00305
00306 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
00307
00308 return ret;
00309 }
00310
00311 AVFilterBufferRef *
00312 avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms,
00313 int w, int h, enum PixelFormat format)
00314 {
00315 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
00316 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
00317
00318 if (!pic || !picref)
00319 goto fail;
00320
00321 picref->buf = pic;
00322 picref->buf->free = ff_avfilter_default_free_buffer;
00323 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
00324 goto fail;
00325
00326 pic->w = picref->video->w = w;
00327 pic->h = picref->video->h = h;
00328
00329
00330 picref->perms = perms | AV_PERM_READ;
00331
00332 pic->refcount = 1;
00333 picref->type = AVMEDIA_TYPE_VIDEO;
00334 pic->format = picref->format = format;
00335
00336 memcpy(pic->data, data, 4*sizeof(data[0]));
00337 memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
00338 memcpy(picref->data, pic->data, sizeof(picref->data));
00339 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
00340
00341 return picref;
00342
00343 fail:
00344 if (picref && picref->video)
00345 av_free(picref->video);
00346 av_free(picref);
00347 av_free(pic);
00348 return NULL;
00349 }
00350
00351 AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, int perms,
00352 enum AVSampleFormat sample_fmt, int size,
00353 uint64_t channel_layout, int planar)
00354 {
00355 AVFilterBufferRef *ret = NULL;
00356
00357 if (link->dstpad->get_audio_buffer)
00358 ret = link->dstpad->get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
00359
00360 if (!ret)
00361 ret = avfilter_default_get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
00362
00363 if (ret)
00364 ret->type = AVMEDIA_TYPE_AUDIO;
00365
00366 return ret;
00367 }
00368
00369 int avfilter_request_frame(AVFilterLink *link)
00370 {
00371 FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
00372
00373 if (link->srcpad->request_frame)
00374 return link->srcpad->request_frame(link);
00375 else if (link->src->inputs[0])
00376 return avfilter_request_frame(link->src->inputs[0]);
00377 else return -1;
00378 }
00379
00380 int avfilter_poll_frame(AVFilterLink *link)
00381 {
00382 int i, min = INT_MAX;
00383
00384 if (link->srcpad->poll_frame)
00385 return link->srcpad->poll_frame(link);
00386
00387 for (i = 0; i < link->src->input_count; i++) {
00388 int val;
00389 if (!link->src->inputs[i])
00390 return -1;
00391 val = avfilter_poll_frame(link->src->inputs[i]);
00392 min = FFMIN(min, val);
00393 }
00394
00395 return min;
00396 }
00397
00398
00399
00400 void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
00401 {
00402 void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
00403 AVFilterPad *dst = link->dstpad;
00404 int perms = picref->perms;
00405
00406 FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
00407
00408 if (!(start_frame = dst->start_frame))
00409 start_frame = avfilter_default_start_frame;
00410
00411 if (picref->linesize[0] < 0)
00412 perms |= AV_PERM_NEG_LINESIZES;
00413
00414 if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
00415 av_log(link->dst, AV_LOG_DEBUG,
00416 "frame copy needed (have perms %x, need %x, reject %x)\n",
00417 picref->perms,
00418 link->dstpad->min_perms, link->dstpad->rej_perms);
00419
00420 link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
00421 link->src_buf = picref;
00422 avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
00423 }
00424 else
00425 link->cur_buf = picref;
00426
00427 start_frame(link, link->cur_buf);
00428 }
00429
00430 void avfilter_end_frame(AVFilterLink *link)
00431 {
00432 void (*end_frame)(AVFilterLink *);
00433
00434 if (!(end_frame = link->dstpad->end_frame))
00435 end_frame = avfilter_default_end_frame;
00436
00437 end_frame(link);
00438
00439
00440
00441 if (link->src_buf) {
00442 avfilter_unref_buffer(link->src_buf);
00443 link->src_buf = NULL;
00444 }
00445 }
00446
00447 void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
00448 {
00449 uint8_t *src[4], *dst[4];
00450 int i, j, vsub;
00451 void (*draw_slice)(AVFilterLink *, int, int, int);
00452
00453 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);
00454
00455
00456 if (link->src_buf) {
00457 vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
00458
00459 for (i = 0; i < 4; i++) {
00460 if (link->src_buf->data[i]) {
00461 src[i] = link->src_buf-> data[i] +
00462 (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
00463 dst[i] = link->cur_buf->data[i] +
00464 (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
00465 } else
00466 src[i] = dst[i] = NULL;
00467 }
00468
00469 for (i = 0; i < 4; i++) {
00470 int planew =
00471 av_image_get_linesize(link->format, link->cur_buf->video->w, i);
00472
00473 if (!src[i]) continue;
00474
00475 for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
00476 memcpy(dst[i], src[i], planew);
00477 src[i] += link->src_buf->linesize[i];
00478 dst[i] += link->cur_buf->linesize[i];
00479 }
00480 }
00481 }
00482
00483 if (!(draw_slice = link->dstpad->draw_slice))
00484 draw_slice = avfilter_default_draw_slice;
00485 draw_slice(link, y, h, slice_dir);
00486 }
00487
00488 void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
00489 {
00490 void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
00491 AVFilterPad *dst = link->dstpad;
00492
00493 FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1);
00494
00495 if (!(filter_samples = dst->filter_samples))
00496 filter_samples = avfilter_default_filter_samples;
00497
00498
00499 if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
00500 dst->rej_perms & samplesref->perms) {
00501
00502 av_log(link->dst, AV_LOG_DEBUG,
00503 "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
00504 samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
00505
00506 link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms,
00507 samplesref->format,
00508 samplesref->audio->size,
00509 samplesref->audio->channel_layout,
00510 samplesref->audio->planar);
00511 link->cur_buf->pts = samplesref->pts;
00512 link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
00513
00514
00515 memcpy(link->cur_buf->data[0], samplesref->data[0], samplesref->audio->size);
00516
00517 avfilter_unref_buffer(samplesref);
00518 } else
00519 link->cur_buf = samplesref;
00520
00521 filter_samples(link, link->cur_buf);
00522 }
00523
00524 #define MAX_REGISTERED_AVFILTERS_NB 64
00525
00526 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
00527
00528 static int next_registered_avfilter_idx = 0;
00529
00530 AVFilter *avfilter_get_by_name(const char *name)
00531 {
00532 int i;
00533
00534 for (i = 0; registered_avfilters[i]; i++)
00535 if (!strcmp(registered_avfilters[i]->name, name))
00536 return registered_avfilters[i];
00537
00538 return NULL;
00539 }
00540
00541 int avfilter_register(AVFilter *filter)
00542 {
00543 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB)
00544 return -1;
00545
00546 registered_avfilters[next_registered_avfilter_idx++] = filter;
00547 return 0;
00548 }
00549
00550 AVFilter **av_filter_next(AVFilter **filter)
00551 {
00552 return filter ? ++filter : ®istered_avfilters[0];
00553 }
00554
00555 void avfilter_uninit(void)
00556 {
00557 memset(registered_avfilters, 0, sizeof(registered_avfilters));
00558 next_registered_avfilter_idx = 0;
00559 }
00560
00561 static int pad_count(const AVFilterPad *pads)
00562 {
00563 int count;
00564
00565 for(count = 0; pads->name; count ++) pads ++;
00566 return count;
00567 }
00568
00569 static const char *filter_name(void *p)
00570 {
00571 AVFilterContext *filter = p;
00572 return filter->filter->name;
00573 }
00574
00575 static const AVClass avfilter_class = {
00576 "AVFilter",
00577 filter_name,
00578 NULL,
00579 LIBAVUTIL_VERSION_INT,
00580 };
00581
00582 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
00583 {
00584 AVFilterContext *ret;
00585 *filter_ctx = NULL;
00586
00587 if (!filter)
00588 return AVERROR(EINVAL);
00589
00590 ret = av_mallocz(sizeof(AVFilterContext));
00591 if (!ret)
00592 return AVERROR(ENOMEM);
00593
00594 ret->av_class = &avfilter_class;
00595 ret->filter = filter;
00596 ret->name = inst_name ? av_strdup(inst_name) : NULL;
00597 if (filter->priv_size) {
00598 ret->priv = av_mallocz(filter->priv_size);
00599 if (!ret->priv)
00600 goto err;
00601 }
00602
00603 ret->input_count = pad_count(filter->inputs);
00604 if (ret->input_count) {
00605 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
00606 if (!ret->input_pads)
00607 goto err;
00608 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
00609 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
00610 if (!ret->inputs)
00611 goto err;
00612 }
00613
00614 ret->output_count = pad_count(filter->outputs);
00615 if (ret->output_count) {
00616 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
00617 if (!ret->output_pads)
00618 goto err;
00619 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
00620 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
00621 if (!ret->outputs)
00622 goto err;
00623 }
00624
00625 *filter_ctx = ret;
00626 return 0;
00627
00628 err:
00629 av_freep(&ret->inputs);
00630 av_freep(&ret->input_pads);
00631 ret->input_count = 0;
00632 av_freep(&ret->outputs);
00633 av_freep(&ret->output_pads);
00634 ret->output_count = 0;
00635 av_freep(&ret->priv);
00636 av_free(ret);
00637 return AVERROR(ENOMEM);
00638 }
00639
00640 void avfilter_free(AVFilterContext *filter)
00641 {
00642 int i;
00643 AVFilterLink *link;
00644
00645 if (filter->filter->uninit)
00646 filter->filter->uninit(filter);
00647
00648 for (i = 0; i < filter->input_count; i++) {
00649 if ((link = filter->inputs[i])) {
00650 if (link->src)
00651 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
00652 avfilter_formats_unref(&link->in_formats);
00653 avfilter_formats_unref(&link->out_formats);
00654 }
00655 av_freep(&link);
00656 }
00657 for (i = 0; i < filter->output_count; i++) {
00658 if ((link = filter->outputs[i])) {
00659 if (link->dst)
00660 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
00661 avfilter_formats_unref(&link->in_formats);
00662 avfilter_formats_unref(&link->out_formats);
00663 }
00664 av_freep(&link);
00665 }
00666
00667 av_freep(&filter->name);
00668 av_freep(&filter->input_pads);
00669 av_freep(&filter->output_pads);
00670 av_freep(&filter->inputs);
00671 av_freep(&filter->outputs);
00672 av_freep(&filter->priv);
00673 av_free(filter);
00674 }
00675
00676 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
00677 {
00678 int ret=0;
00679
00680 if (filter->filter->init)
00681 ret = filter->filter->init(filter, args, opaque);
00682 return ret;
00683 }
00684
00685 int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src)
00686 {
00687 if (dst->type != AVMEDIA_TYPE_VIDEO)
00688 return AVERROR(EINVAL);
00689
00690 dst->pts = src->pts;
00691 dst->format = src->format;
00692
00693 dst->video->w = src->width;
00694 dst->video->h = src->height;
00695 dst->video->pixel_aspect = src->sample_aspect_ratio;
00696 dst->video->interlaced = src->interlaced_frame;
00697 dst->video->top_field_first = src->top_field_first;
00698 dst->video->key_frame = src->key_frame;
00699 dst->video->pict_type = src->pict_type;
00700
00701 return 0;
00702 }