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00024 #include "libavutil/pixdesc.h"
00025 #include "libavutil/rational.h"
00026 #include "libavutil/audioconvert.h"
00027 #include "libavutil/avassert.h"
00028 #include "libavutil/avstring.h"
00029
00030 #include "avfilter.h"
00031 #include "formats.h"
00032 #include "internal.h"
00033
00034 unsigned avfilter_version(void) {
00035 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
00036 return LIBAVFILTER_VERSION_INT;
00037 }
00038
00039 const char *avfilter_configuration(void)
00040 {
00041 return FFMPEG_CONFIGURATION;
00042 }
00043
00044 const char *avfilter_license(void)
00045 {
00046 #define LICENSE_PREFIX "libavfilter license: "
00047 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
00048 }
00049
00050 void ff_command_queue_pop(AVFilterContext *filter)
00051 {
00052 AVFilterCommand *c= filter->command_queue;
00053 av_freep(&c->arg);
00054 av_freep(&c->command);
00055 filter->command_queue= c->next;
00056 av_free(c);
00057 }
00058
00059 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
00060 AVFilterPad **pads, AVFilterLink ***links,
00061 AVFilterPad *newpad)
00062 {
00063 unsigned i;
00064
00065 idx = FFMIN(idx, *count);
00066
00067 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
00068 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
00069 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
00070 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
00071 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
00072 (*links)[idx] = NULL;
00073
00074 (*count)++;
00075 for (i = idx+1; i < *count; i++)
00076 if (*links[i])
00077 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
00078 }
00079
00080 int avfilter_link(AVFilterContext *src, unsigned srcpad,
00081 AVFilterContext *dst, unsigned dstpad)
00082 {
00083 AVFilterLink *link;
00084
00085 if (src->output_count <= srcpad || dst->input_count <= dstpad ||
00086 src->outputs[srcpad] || dst->inputs[dstpad])
00087 return -1;
00088
00089 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
00090 av_log(src, AV_LOG_ERROR,
00091 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
00092 src->name, srcpad, dst->name, dstpad);
00093 return AVERROR(EINVAL);
00094 }
00095
00096 src->outputs[srcpad] =
00097 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
00098
00099 link->src = src;
00100 link->dst = dst;
00101 link->srcpad = &src->output_pads[srcpad];
00102 link->dstpad = &dst->input_pads[dstpad];
00103 link->type = src->output_pads[srcpad].type;
00104 assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
00105 link->format = -1;
00106
00107 return 0;
00108 }
00109
00110 void avfilter_link_free(AVFilterLink **link)
00111 {
00112 if (!*link)
00113 return;
00114
00115 if ((*link)->pool)
00116 ff_free_pool((*link)->pool);
00117
00118 av_freep(link);
00119 }
00120
00121 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
00122 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
00123 {
00124 int ret;
00125 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
00126
00127 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "
00128 "between the filter '%s' and the filter '%s'\n",
00129 filt->name, link->src->name, link->dst->name);
00130
00131 link->dst->inputs[dstpad_idx] = NULL;
00132 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
00133
00134 link->dst->inputs[dstpad_idx] = link;
00135 return ret;
00136 }
00137
00138
00139 link->dst = filt;
00140 link->dstpad = &filt->input_pads[filt_srcpad_idx];
00141 filt->inputs[filt_srcpad_idx] = link;
00142
00143
00144
00145 if (link->out_formats)
00146 avfilter_formats_changeref(&link->out_formats,
00147 &filt->outputs[filt_dstpad_idx]->out_formats);
00148 if (link->out_channel_layouts)
00149 ff_channel_layouts_changeref(&link->out_channel_layouts,
00150 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
00151 if (link->out_samplerates)
00152 avfilter_formats_changeref(&link->out_samplerates,
00153 &filt->outputs[filt_dstpad_idx]->out_samplerates);
00154
00155 return 0;
00156 }
00157
00158 int avfilter_config_links(AVFilterContext *filter)
00159 {
00160 int (*config_link)(AVFilterLink *);
00161 unsigned i;
00162 int ret;
00163
00164 for (i = 0; i < filter->input_count; i ++) {
00165 AVFilterLink *link = filter->inputs[i];
00166 AVFilterLink *inlink = link->src->input_count ?
00167 link->src->inputs[0] : NULL;
00168
00169 if (!link) continue;
00170
00171 link->current_pts = AV_NOPTS_VALUE;
00172
00173 switch (link->init_state) {
00174 case AVLINK_INIT:
00175 continue;
00176 case AVLINK_STARTINIT:
00177 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
00178 return 0;
00179 case AVLINK_UNINIT:
00180 link->init_state = AVLINK_STARTINIT;
00181
00182 if ((ret = avfilter_config_links(link->src)) < 0)
00183 return ret;
00184
00185 if (!(config_link = link->srcpad->config_props)) {
00186 if (link->src->input_count != 1) {
00187 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
00188 "with more than one input "
00189 "must set config_props() "
00190 "callbacks on all outputs\n");
00191 return AVERROR(EINVAL);
00192 }
00193 } else if ((ret = config_link(link)) < 0)
00194 return ret;
00195
00196 switch (link->type) {
00197 case AVMEDIA_TYPE_VIDEO:
00198 if (!link->time_base.num && !link->time_base.den)
00199 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
00200
00201 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
00202 link->sample_aspect_ratio = inlink ?
00203 inlink->sample_aspect_ratio : (AVRational){1,1};
00204
00205 if (inlink) {
00206 if (!link->w)
00207 link->w = inlink->w;
00208 if (!link->h)
00209 link->h = inlink->h;
00210 } else if (!link->w || !link->h) {
00211 av_log(link->src, AV_LOG_ERROR,
00212 "Video source filters must set their output link's "
00213 "width and height\n");
00214 return AVERROR(EINVAL);
00215 }
00216 break;
00217
00218 case AVMEDIA_TYPE_AUDIO:
00219 if (inlink) {
00220 if (!link->sample_rate)
00221 link->sample_rate = inlink->sample_rate;
00222 if (!link->time_base.num && !link->time_base.den)
00223 link->time_base = inlink->time_base;
00224 } else if (!link->sample_rate) {
00225 av_log(link->src, AV_LOG_ERROR,
00226 "Audio source filters must set their output link's "
00227 "sample_rate\n");
00228 return AVERROR(EINVAL);
00229 }
00230
00231 if (!link->time_base.num && !link->time_base.den)
00232 link->time_base = (AVRational) {1, link->sample_rate};
00233 }
00234
00235 if ((config_link = link->dstpad->config_props))
00236 if ((ret = config_link(link)) < 0)
00237 return ret;
00238
00239 link->init_state = AVLINK_INIT;
00240 }
00241 }
00242
00243 return 0;
00244 }
00245
00246 void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
00247 {
00248 if (link->type == AVMEDIA_TYPE_VIDEO) {
00249 av_dlog(ctx,
00250 "link[%p s:%dx%d fmt:%s %s->%s]%s",
00251 link, link->w, link->h,
00252 av_pix_fmt_descriptors[link->format].name,
00253 link->src ? link->src->filter->name : "",
00254 link->dst ? link->dst->filter->name : "",
00255 end ? "\n" : "");
00256 } else {
00257 char buf[128];
00258 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
00259
00260 av_dlog(ctx,
00261 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
00262 link, (int)link->sample_rate, buf,
00263 av_get_sample_fmt_name(link->format),
00264 link->src ? link->src->filter->name : "",
00265 link->dst ? link->dst->filter->name : "",
00266 end ? "\n" : "");
00267 }
00268 }
00269
00270 int avfilter_request_frame(AVFilterLink *link)
00271 {
00272 FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
00273
00274 if (link->srcpad->request_frame)
00275 return link->srcpad->request_frame(link);
00276 else if (link->src->inputs[0])
00277 return avfilter_request_frame(link->src->inputs[0]);
00278 else return -1;
00279 }
00280
00281 int avfilter_poll_frame(AVFilterLink *link)
00282 {
00283 int i, min = INT_MAX;
00284
00285 if (link->srcpad->poll_frame)
00286 return link->srcpad->poll_frame(link);
00287
00288 for (i = 0; i < link->src->input_count; i++) {
00289 int val;
00290 if (!link->src->inputs[i])
00291 return -1;
00292 val = avfilter_poll_frame(link->src->inputs[i]);
00293 min = FFMIN(min, val);
00294 }
00295
00296 return min;
00297 }
00298
00299 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
00300 {
00301 if (pts == AV_NOPTS_VALUE)
00302 return;
00303 link->current_pts = pts;
00304 if (link->graph && link->age_index >= 0)
00305 ff_avfilter_graph_update_heap(link->graph, link);
00306 }
00307
00308 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
00309 {
00310 if(!strcmp(cmd, "ping")){
00311 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
00312 return 0;
00313 }else if(filter->filter->process_command) {
00314 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
00315 }
00316 return AVERROR(ENOSYS);
00317 }
00318
00319 #define MAX_REGISTERED_AVFILTERS_NB 128
00320
00321 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
00322
00323 static int next_registered_avfilter_idx = 0;
00324
00325 AVFilter *avfilter_get_by_name(const char *name)
00326 {
00327 int i;
00328
00329 for (i = 0; registered_avfilters[i]; i++)
00330 if (!strcmp(registered_avfilters[i]->name, name))
00331 return registered_avfilters[i];
00332
00333 return NULL;
00334 }
00335
00336 int avfilter_register(AVFilter *filter)
00337 {
00338 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
00339 av_log(NULL, AV_LOG_ERROR,
00340 "Maximum number of registered filters %d reached, "
00341 "impossible to register filter with name '%s'\n",
00342 MAX_REGISTERED_AVFILTERS_NB, filter->name);
00343 return AVERROR(ENOMEM);
00344 }
00345
00346 registered_avfilters[next_registered_avfilter_idx++] = filter;
00347 return 0;
00348 }
00349
00350 AVFilter **av_filter_next(AVFilter **filter)
00351 {
00352 return filter ? ++filter : ®istered_avfilters[0];
00353 }
00354
00355 void avfilter_uninit(void)
00356 {
00357 memset(registered_avfilters, 0, sizeof(registered_avfilters));
00358 next_registered_avfilter_idx = 0;
00359 }
00360
00361 static int pad_count(const AVFilterPad *pads)
00362 {
00363 int count;
00364
00365 for(count = 0; pads->name; count ++) pads ++;
00366 return count;
00367 }
00368
00369 static const char *filter_name(void *p)
00370 {
00371 AVFilterContext *filter = p;
00372 return filter->filter->name;
00373 }
00374
00375 static const AVClass avfilter_class = {
00376 "AVFilter",
00377 filter_name,
00378 NULL,
00379 LIBAVUTIL_VERSION_INT,
00380 };
00381
00382 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
00383 {
00384 AVFilterContext *ret;
00385 *filter_ctx = NULL;
00386
00387 if (!filter)
00388 return AVERROR(EINVAL);
00389
00390 ret = av_mallocz(sizeof(AVFilterContext));
00391 if (!ret)
00392 return AVERROR(ENOMEM);
00393
00394 ret->av_class = &avfilter_class;
00395 ret->filter = filter;
00396 ret->name = inst_name ? av_strdup(inst_name) : NULL;
00397 if (filter->priv_size) {
00398 ret->priv = av_mallocz(filter->priv_size);
00399 if (!ret->priv)
00400 goto err;
00401 }
00402
00403 ret->input_count = pad_count(filter->inputs);
00404 if (ret->input_count) {
00405 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
00406 if (!ret->input_pads)
00407 goto err;
00408 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
00409 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
00410 if (!ret->inputs)
00411 goto err;
00412 }
00413
00414 ret->output_count = pad_count(filter->outputs);
00415 if (ret->output_count) {
00416 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
00417 if (!ret->output_pads)
00418 goto err;
00419 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
00420 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
00421 if (!ret->outputs)
00422 goto err;
00423 }
00424
00425 *filter_ctx = ret;
00426 return 0;
00427
00428 err:
00429 av_freep(&ret->inputs);
00430 av_freep(&ret->input_pads);
00431 ret->input_count = 0;
00432 av_freep(&ret->outputs);
00433 av_freep(&ret->output_pads);
00434 ret->output_count = 0;
00435 av_freep(&ret->priv);
00436 av_free(ret);
00437 return AVERROR(ENOMEM);
00438 }
00439
00440 void avfilter_free(AVFilterContext *filter)
00441 {
00442 int i;
00443 AVFilterLink *link;
00444
00445 if (!filter)
00446 return;
00447
00448 if (filter->filter->uninit)
00449 filter->filter->uninit(filter);
00450
00451 for (i = 0; i < filter->input_count; i++) {
00452 if ((link = filter->inputs[i])) {
00453 if (link->src)
00454 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
00455 avfilter_formats_unref(&link->in_formats);
00456 avfilter_formats_unref(&link->out_formats);
00457 avfilter_formats_unref(&link->in_samplerates);
00458 avfilter_formats_unref(&link->out_samplerates);
00459 ff_channel_layouts_unref(&link->in_channel_layouts);
00460 ff_channel_layouts_unref(&link->out_channel_layouts);
00461 }
00462 avfilter_link_free(&link);
00463 }
00464 for (i = 0; i < filter->output_count; i++) {
00465 if ((link = filter->outputs[i])) {
00466 if (link->dst)
00467 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
00468 avfilter_formats_unref(&link->in_formats);
00469 avfilter_formats_unref(&link->out_formats);
00470 avfilter_formats_unref(&link->in_samplerates);
00471 avfilter_formats_unref(&link->out_samplerates);
00472 ff_channel_layouts_unref(&link->in_channel_layouts);
00473 ff_channel_layouts_unref(&link->out_channel_layouts);
00474 }
00475 avfilter_link_free(&link);
00476 }
00477
00478 av_freep(&filter->name);
00479 av_freep(&filter->input_pads);
00480 av_freep(&filter->output_pads);
00481 av_freep(&filter->inputs);
00482 av_freep(&filter->outputs);
00483 av_freep(&filter->priv);
00484 while(filter->command_queue){
00485 ff_command_queue_pop(filter);
00486 }
00487 av_free(filter);
00488 }
00489
00490 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
00491 {
00492 int ret=0;
00493
00494 if (filter->filter->init)
00495 ret = filter->filter->init(filter, args, opaque);
00496 return ret;
00497 }