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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 "libavutil/avassert.h"
00029 #include "libavutil/avstring.h"
00030 #include "avfilter.h"
00031 #include "internal.h"
00032
00033 unsigned avfilter_version(void) {
00034 return LIBAVFILTER_VERSION_INT;
00035 }
00036
00037 const char *avfilter_configuration(void)
00038 {
00039 return FFMPEG_CONFIGURATION;
00040 }
00041
00042 const char *avfilter_license(void)
00043 {
00044 #define LICENSE_PREFIX "libavfilter license: "
00045 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
00046 }
00047
00048 static void command_queue_pop(AVFilterContext *filter)
00049 {
00050 AVFilterCommand *c= filter->command_queue;
00051 av_freep(&c->arg);
00052 av_freep(&c->command);
00053 filter->command_queue= c->next;
00054 av_free(c);
00055 }
00056
00057 AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
00058 {
00059 AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
00060 if (!ret)
00061 return NULL;
00062 *ret = *ref;
00063 if (ref->type == AVMEDIA_TYPE_VIDEO) {
00064 ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
00065 if (!ret->video) {
00066 av_free(ret);
00067 return NULL;
00068 }
00069 *ret->video = *ref->video;
00070 } else if (ref->type == AVMEDIA_TYPE_AUDIO) {
00071 ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
00072 if (!ret->audio) {
00073 av_free(ret);
00074 return NULL;
00075 }
00076 *ret->audio = *ref->audio;
00077 }
00078 ret->perms &= pmask;
00079 ret->buf->refcount ++;
00080 return ret;
00081 }
00082
00083 static void store_in_pool(AVFilterBufferRef *ref)
00084 {
00085 int i;
00086 AVFilterPool *pool= ref->buf->priv;
00087
00088 av_assert0(ref->buf->data[0]);
00089
00090 if (pool->count == POOL_SIZE) {
00091 AVFilterBufferRef *ref1 = pool->pic[0];
00092 av_freep(&ref1->video);
00093 av_freep(&ref1->audio);
00094 av_freep(&ref1->buf->data[0]);
00095 av_freep(&ref1->buf);
00096 av_free(ref1);
00097 memmove(&pool->pic[0], &pool->pic[1], sizeof(void*)*(POOL_SIZE-1));
00098 pool->count--;
00099 pool->pic[POOL_SIZE-1] = NULL;
00100 }
00101
00102 for (i = 0; i < POOL_SIZE; i++) {
00103 if (!pool->pic[i]) {
00104 pool->pic[i] = ref;
00105 pool->count++;
00106 break;
00107 }
00108 }
00109 }
00110
00111 void avfilter_unref_buffer(AVFilterBufferRef *ref)
00112 {
00113 if (!ref)
00114 return;
00115 if (!(--ref->buf->refcount)) {
00116 if (!ref->buf->free) {
00117 store_in_pool(ref);
00118 return;
00119 }
00120 ref->buf->free(ref->buf);
00121 }
00122 av_freep(&ref->video);
00123 av_freep(&ref->audio);
00124 av_free(ref);
00125 }
00126
00127 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
00128 AVFilterPad **pads, AVFilterLink ***links,
00129 AVFilterPad *newpad)
00130 {
00131 unsigned i;
00132
00133 idx = FFMIN(idx, *count);
00134
00135 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
00136 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
00137 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
00138 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
00139 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
00140 (*links)[idx] = NULL;
00141
00142 (*count)++;
00143 for (i = idx+1; i < *count; i++)
00144 if (*links[i])
00145 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
00146 }
00147
00148 int avfilter_link(AVFilterContext *src, unsigned srcpad,
00149 AVFilterContext *dst, unsigned dstpad)
00150 {
00151 AVFilterLink *link;
00152
00153 if (src->output_count <= srcpad || dst->input_count <= dstpad ||
00154 src->outputs[srcpad] || dst->inputs[dstpad])
00155 return -1;
00156
00157 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
00158 av_log(src, AV_LOG_ERROR,
00159 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
00160 src->name, srcpad, dst->name, dstpad);
00161 return AVERROR(EINVAL);
00162 }
00163
00164 src->outputs[srcpad] =
00165 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
00166
00167 link->src = src;
00168 link->dst = dst;
00169 link->srcpad = &src->output_pads[srcpad];
00170 link->dstpad = &dst->input_pads[dstpad];
00171 link->type = src->output_pads[srcpad].type;
00172 assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
00173 link->format = -1;
00174
00175 return 0;
00176 }
00177
00178 void avfilter_link_free(AVFilterLink **link)
00179 {
00180 if (!*link)
00181 return;
00182
00183 if ((*link)->pool) {
00184 int i;
00185 for (i = 0; i < POOL_SIZE; i++) {
00186 if ((*link)->pool->pic[i]) {
00187 AVFilterBufferRef *picref = (*link)->pool->pic[i];
00188
00189
00190 av_freep(&picref->buf->data[0]);
00191 av_freep(&picref->buf);
00192
00193 av_freep(&picref->audio);
00194 av_freep(&picref->video);
00195 av_freep(&(*link)->pool->pic[i]);
00196 }
00197 }
00198 (*link)->pool->count = 0;
00199
00200 }
00201 av_freep(link);
00202 }
00203
00204 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
00205 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
00206 {
00207 int ret;
00208 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
00209
00210 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "
00211 "between the filter '%s' and the filter '%s'\n",
00212 filt->name, link->src->name, link->dst->name);
00213
00214 link->dst->inputs[dstpad_idx] = NULL;
00215 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
00216
00217 link->dst->inputs[dstpad_idx] = link;
00218 return ret;
00219 }
00220
00221
00222 link->dst = filt;
00223 link->dstpad = &filt->input_pads[filt_srcpad_idx];
00224 filt->inputs[filt_srcpad_idx] = link;
00225
00226
00227
00228 if (link->out_formats)
00229 avfilter_formats_changeref(&link->out_formats,
00230 &filt->outputs[filt_dstpad_idx]->out_formats);
00231 if (link->out_chlayouts)
00232 avfilter_formats_changeref(&link->out_chlayouts,
00233 &filt->outputs[filt_dstpad_idx]->out_chlayouts);
00234 if (link->out_packing)
00235 avfilter_formats_changeref(&link->out_packing,
00236 &filt->outputs[filt_dstpad_idx]->out_packing);
00237
00238 return 0;
00239 }
00240
00241 int avfilter_config_links(AVFilterContext *filter)
00242 {
00243 int (*config_link)(AVFilterLink *);
00244 unsigned i;
00245 int ret;
00246
00247 for (i = 0; i < filter->input_count; i ++) {
00248 AVFilterLink *link = filter->inputs[i];
00249 AVFilterLink *inlink = link->src->input_count ?
00250 link->src->inputs[0] : NULL;
00251
00252 if (!link) continue;
00253
00254 switch (link->init_state) {
00255 case AVLINK_INIT:
00256 continue;
00257 case AVLINK_STARTINIT:
00258 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
00259 return 0;
00260 case AVLINK_UNINIT:
00261 link->init_state = AVLINK_STARTINIT;
00262
00263 if ((ret = avfilter_config_links(link->src)) < 0)
00264 return ret;
00265
00266 if (!(config_link = link->srcpad->config_props)) {
00267 if (link->src->input_count != 1) {
00268 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
00269 "with more than one input "
00270 "must set config_props() "
00271 "callbacks on all outputs\n");
00272 return AVERROR(EINVAL);
00273 }
00274 } else if ((ret = config_link(link)) < 0)
00275 return ret;
00276
00277 switch (link->type) {
00278 case AVMEDIA_TYPE_VIDEO:
00279 if (!link->time_base.num && !link->time_base.den)
00280 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
00281
00282 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
00283 link->sample_aspect_ratio = inlink ?
00284 inlink->sample_aspect_ratio : (AVRational){1,1};
00285
00286 if (inlink) {
00287 if (!link->w)
00288 link->w = inlink->w;
00289 if (!link->h)
00290 link->h = inlink->h;
00291 } else if (!link->w || !link->h) {
00292 av_log(link->src, AV_LOG_ERROR,
00293 "Video source filters must set their output link's "
00294 "width and height\n");
00295 return AVERROR(EINVAL);
00296 }
00297 break;
00298
00299 case AVMEDIA_TYPE_AUDIO:
00300 if (inlink) {
00301 if (!link->sample_rate)
00302 link->sample_rate = inlink->sample_rate;
00303 if (!link->time_base.num && !link->time_base.den)
00304 link->time_base = inlink->time_base;
00305 } else if (!link->sample_rate) {
00306 av_log(link->src, AV_LOG_ERROR,
00307 "Audio source filters must set their output link's "
00308 "sample_rate\n");
00309 return AVERROR(EINVAL);
00310 }
00311
00312 if (!link->time_base.num && !link->time_base.den)
00313 link->time_base = (AVRational) {1, link->sample_rate};
00314 }
00315
00316 if ((config_link = link->dstpad->config_props))
00317 if ((ret = config_link(link)) < 0)
00318 return ret;
00319
00320 link->init_state = AVLINK_INIT;
00321 }
00322 }
00323
00324 return 0;
00325 }
00326
00327 static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
00328 {
00329 snprintf(buf, buf_size, "%s%s%s%s%s%s",
00330 perms & AV_PERM_READ ? "r" : "",
00331 perms & AV_PERM_WRITE ? "w" : "",
00332 perms & AV_PERM_PRESERVE ? "p" : "",
00333 perms & AV_PERM_REUSE ? "u" : "",
00334 perms & AV_PERM_REUSE2 ? "U" : "",
00335 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
00336 return buf;
00337 }
00338
00339 static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
00340 {
00341 av_unused char buf[16];
00342 av_dlog(ctx,
00343 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
00344 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
00345 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
00346 ref->pts, ref->pos);
00347
00348 if (ref->video) {
00349 av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
00350 ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,
00351 ref->video->w, ref->video->h,
00352 !ref->video->interlaced ? 'P' :
00353 ref->video->top_field_first ? 'T' : 'B',
00354 ref->video->key_frame,
00355 av_get_picture_type_char(ref->video->pict_type));
00356 }
00357 if (ref->audio) {
00358 av_dlog(ctx, " cl:%"PRId64"d n:%d r:%d p:%d",
00359 ref->audio->channel_layout,
00360 ref->audio->nb_samples,
00361 ref->audio->sample_rate,
00362 ref->audio->planar);
00363 }
00364
00365 av_dlog(ctx, "]%s", end ? "\n" : "");
00366 }
00367
00368 static void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
00369 {
00370 if (link->type == AVMEDIA_TYPE_VIDEO) {
00371 av_dlog(ctx,
00372 "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
00373 link, link->w, link->h,
00374 av_pix_fmt_descriptors[link->format].name,
00375 link->src ? link->src->filter->name : "",
00376 link->dst ? link->dst->filter->name : "",
00377 end ? "\n" : "");
00378 } else {
00379 char buf[128];
00380 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
00381
00382 av_dlog(ctx,
00383 "link[%p r:%d cl:%s fmt:%-16s %-16s->%-16s]%s",
00384 link, (int)link->sample_rate, buf,
00385 av_get_sample_fmt_name(link->format),
00386 link->src ? link->src->filter->name : "",
00387 link->dst ? link->dst->filter->name : "",
00388 end ? "\n" : "");
00389 }
00390 }
00391
00392 #define FF_DPRINTF_START(ctx, func) av_dlog(NULL, "%-16s: ", #func)
00393
00394 AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
00395 {
00396 AVFilterBufferRef *ret = NULL;
00397
00398 av_unused char buf[16];
00399 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
00400 av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
00401
00402 if (link->dstpad->get_video_buffer)
00403 ret = link->dstpad->get_video_buffer(link, perms, w, h);
00404
00405 if (!ret)
00406 ret = avfilter_default_get_video_buffer(link, perms, w, h);
00407
00408 if (ret)
00409 ret->type = AVMEDIA_TYPE_VIDEO;
00410
00411 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
00412
00413 return ret;
00414 }
00415
00416 AVFilterBufferRef *
00417 avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,
00418 int w, int h, enum PixelFormat format)
00419 {
00420 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
00421 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
00422
00423 if (!pic || !picref)
00424 goto fail;
00425
00426 picref->buf = pic;
00427 picref->buf->free = ff_avfilter_default_free_buffer;
00428 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
00429 goto fail;
00430
00431 pic->w = picref->video->w = w;
00432 pic->h = picref->video->h = h;
00433
00434
00435 picref->perms = perms | AV_PERM_READ;
00436
00437 pic->refcount = 1;
00438 picref->type = AVMEDIA_TYPE_VIDEO;
00439 pic->format = picref->format = format;
00440
00441 memcpy(pic->data, data, 4*sizeof(data[0]));
00442 memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
00443 memcpy(picref->data, pic->data, sizeof(picref->data));
00444 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
00445
00446 return picref;
00447
00448 fail:
00449 if (picref && picref->video)
00450 av_free(picref->video);
00451 av_free(picref);
00452 av_free(pic);
00453 return NULL;
00454 }
00455
00456 AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link,
00457 int perms, int nb_samples)
00458 {
00459 AVFilterBufferRef *ret = NULL;
00460
00461 if (link->dstpad->get_audio_buffer)
00462 ret = link->dstpad->get_audio_buffer(link, perms, nb_samples);
00463
00464 if (!ret)
00465 ret = avfilter_default_get_audio_buffer(link, perms, nb_samples);
00466
00467 if (ret)
00468 ret->type = AVMEDIA_TYPE_AUDIO;
00469
00470 return ret;
00471 }
00472
00473 AVFilterBufferRef *
00474 avfilter_get_audio_buffer_ref_from_arrays(uint8_t *data[8], int linesize[8], int perms,
00475 int nb_samples, enum AVSampleFormat sample_fmt,
00476 uint64_t channel_layout, int planar)
00477 {
00478 AVFilterBuffer *samples = av_mallocz(sizeof(AVFilterBuffer));
00479 AVFilterBufferRef *samplesref = av_mallocz(sizeof(AVFilterBufferRef));
00480
00481 if (!samples || !samplesref)
00482 goto fail;
00483
00484 samplesref->buf = samples;
00485 samplesref->buf->free = ff_avfilter_default_free_buffer;
00486 if (!(samplesref->audio = av_mallocz(sizeof(AVFilterBufferRefAudioProps))))
00487 goto fail;
00488
00489 samplesref->audio->nb_samples = nb_samples;
00490 samplesref->audio->channel_layout = channel_layout;
00491 samplesref->audio->planar = planar;
00492
00493
00494 samplesref->perms = perms | AV_PERM_READ;
00495
00496 samples->refcount = 1;
00497 samplesref->type = AVMEDIA_TYPE_AUDIO;
00498 samplesref->format = sample_fmt;
00499
00500 memcpy(samples->data, data, sizeof(samples->data));
00501 memcpy(samples->linesize, linesize, sizeof(samples->linesize));
00502 memcpy(samplesref->data, data, sizeof(samplesref->data));
00503 memcpy(samplesref->linesize, linesize, sizeof(samplesref->linesize));
00504
00505 return samplesref;
00506
00507 fail:
00508 if (samplesref && samplesref->audio)
00509 av_freep(&samplesref->audio);
00510 av_freep(&samplesref);
00511 av_freep(&samples);
00512 return NULL;
00513 }
00514
00515 int avfilter_request_frame(AVFilterLink *link)
00516 {
00517 FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
00518
00519 if (link->srcpad->request_frame)
00520 return link->srcpad->request_frame(link);
00521 else if (link->src->inputs[0])
00522 return avfilter_request_frame(link->src->inputs[0]);
00523 else return -1;
00524 }
00525
00526 int avfilter_poll_frame(AVFilterLink *link)
00527 {
00528 int i, min = INT_MAX;
00529
00530 if (link->srcpad->poll_frame)
00531 return link->srcpad->poll_frame(link);
00532
00533 for (i = 0; i < link->src->input_count; i++) {
00534 int val;
00535 if (!link->src->inputs[i])
00536 return -1;
00537 val = avfilter_poll_frame(link->src->inputs[i]);
00538 min = FFMIN(min, val);
00539 }
00540
00541 return min;
00542 }
00543
00544
00545
00546 void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
00547 {
00548 void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
00549 AVFilterPad *dst = link->dstpad;
00550 int perms = picref->perms;
00551 AVFilterCommand *cmd= link->dst->command_queue;
00552
00553 FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
00554
00555 if (!(start_frame = dst->start_frame))
00556 start_frame = avfilter_default_start_frame;
00557
00558 if (picref->linesize[0] < 0)
00559 perms |= AV_PERM_NEG_LINESIZES;
00560
00561 if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
00562 av_log(link->dst, AV_LOG_DEBUG,
00563 "frame copy needed (have perms %x, need %x, reject %x)\n",
00564 picref->perms,
00565 link->dstpad->min_perms, link->dstpad->rej_perms);
00566
00567 link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
00568 link->src_buf = picref;
00569 avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
00570 }
00571 else
00572 link->cur_buf = picref;
00573
00574 while(cmd && cmd->time <= picref->pts * av_q2d(link->time_base)){
00575 av_log(link->dst, AV_LOG_DEBUG,
00576 "Processing command time:%f command:%s arg:%s\n",
00577 cmd->time, cmd->command, cmd->arg);
00578 avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
00579 command_queue_pop(link->dst);
00580 cmd= link->dst->command_queue;
00581 }
00582
00583 start_frame(link, link->cur_buf);
00584 }
00585
00586 void avfilter_end_frame(AVFilterLink *link)
00587 {
00588 void (*end_frame)(AVFilterLink *);
00589
00590 if (!(end_frame = link->dstpad->end_frame))
00591 end_frame = avfilter_default_end_frame;
00592
00593 end_frame(link);
00594
00595
00596
00597 if (link->src_buf) {
00598 avfilter_unref_buffer(link->src_buf);
00599 link->src_buf = NULL;
00600 }
00601 }
00602
00603 void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
00604 {
00605 uint8_t *src[4], *dst[4];
00606 int i, j, vsub;
00607 void (*draw_slice)(AVFilterLink *, int, int, int);
00608
00609 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);
00610
00611
00612 if (link->src_buf) {
00613 vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
00614
00615 for (i = 0; i < 4; i++) {
00616 if (link->src_buf->data[i]) {
00617 src[i] = link->src_buf-> data[i] +
00618 (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
00619 dst[i] = link->cur_buf->data[i] +
00620 (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
00621 } else
00622 src[i] = dst[i] = NULL;
00623 }
00624
00625 for (i = 0; i < 4; i++) {
00626 int planew =
00627 av_image_get_linesize(link->format, link->cur_buf->video->w, i);
00628
00629 if (!src[i]) continue;
00630
00631 for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
00632 memcpy(dst[i], src[i], planew);
00633 src[i] += link->src_buf->linesize[i];
00634 dst[i] += link->cur_buf->linesize[i];
00635 }
00636 }
00637 }
00638
00639 if (!(draw_slice = link->dstpad->draw_slice))
00640 draw_slice = avfilter_default_draw_slice;
00641 draw_slice(link, y, h, slice_dir);
00642 }
00643
00644 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
00645 {
00646 if(!strcmp(cmd, "ping")){
00647 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
00648 return 0;
00649 }else if(filter->filter->process_command) {
00650 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
00651 }
00652 return AVERROR(ENOSYS);
00653 }
00654
00655 void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
00656 {
00657 void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
00658 AVFilterPad *dst = link->dstpad;
00659 int i;
00660
00661 FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1);
00662
00663 if (!(filter_samples = dst->filter_samples))
00664 filter_samples = avfilter_default_filter_samples;
00665
00666
00667 if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
00668 dst->rej_perms & samplesref->perms) {
00669
00670 av_log(link->dst, AV_LOG_DEBUG,
00671 "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
00672 samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
00673
00674 link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms,
00675 samplesref->audio->nb_samples);
00676 link->cur_buf->pts = samplesref->pts;
00677 link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
00678
00679
00680 for (i = 0; samplesref->data[i] && i < 8; i++)
00681 memcpy(link->cur_buf->data[i], samplesref->data[i], samplesref->linesize[0]);
00682
00683 avfilter_unref_buffer(samplesref);
00684 } else
00685 link->cur_buf = samplesref;
00686
00687 filter_samples(link, link->cur_buf);
00688 }
00689
00690 #define MAX_REGISTERED_AVFILTERS_NB 128
00691
00692 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
00693
00694 static int next_registered_avfilter_idx = 0;
00695
00696 AVFilter *avfilter_get_by_name(const char *name)
00697 {
00698 int i;
00699
00700 for (i = 0; registered_avfilters[i]; i++)
00701 if (!strcmp(registered_avfilters[i]->name, name))
00702 return registered_avfilters[i];
00703
00704 return NULL;
00705 }
00706
00707 int avfilter_register(AVFilter *filter)
00708 {
00709 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
00710 av_log(NULL, AV_LOG_ERROR,
00711 "Maximum number of registered filters %d reached, "
00712 "impossible to register filter with name '%s'\n",
00713 MAX_REGISTERED_AVFILTERS_NB, filter->name);
00714 return AVERROR(ENOMEM);
00715 }
00716
00717 registered_avfilters[next_registered_avfilter_idx++] = filter;
00718 return 0;
00719 }
00720
00721 AVFilter **av_filter_next(AVFilter **filter)
00722 {
00723 return filter ? ++filter : ®istered_avfilters[0];
00724 }
00725
00726 void avfilter_uninit(void)
00727 {
00728 memset(registered_avfilters, 0, sizeof(registered_avfilters));
00729 next_registered_avfilter_idx = 0;
00730 }
00731
00732 static int pad_count(const AVFilterPad *pads)
00733 {
00734 int count;
00735
00736 for(count = 0; pads->name; count ++) pads ++;
00737 return count;
00738 }
00739
00740 static const char *filter_name(void *p)
00741 {
00742 AVFilterContext *filter = p;
00743 return filter->filter->name;
00744 }
00745
00746 static const AVClass avfilter_class = {
00747 "AVFilter",
00748 filter_name,
00749 NULL,
00750 LIBAVUTIL_VERSION_INT,
00751 };
00752
00753 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
00754 {
00755 AVFilterContext *ret;
00756 *filter_ctx = NULL;
00757
00758 if (!filter)
00759 return AVERROR(EINVAL);
00760
00761 ret = av_mallocz(sizeof(AVFilterContext));
00762 if (!ret)
00763 return AVERROR(ENOMEM);
00764
00765 ret->av_class = &avfilter_class;
00766 ret->filter = filter;
00767 ret->name = inst_name ? av_strdup(inst_name) : NULL;
00768 if (filter->priv_size) {
00769 ret->priv = av_mallocz(filter->priv_size);
00770 if (!ret->priv)
00771 goto err;
00772 }
00773
00774 ret->input_count = pad_count(filter->inputs);
00775 if (ret->input_count) {
00776 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
00777 if (!ret->input_pads)
00778 goto err;
00779 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
00780 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
00781 if (!ret->inputs)
00782 goto err;
00783 }
00784
00785 ret->output_count = pad_count(filter->outputs);
00786 if (ret->output_count) {
00787 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
00788 if (!ret->output_pads)
00789 goto err;
00790 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
00791 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
00792 if (!ret->outputs)
00793 goto err;
00794 }
00795
00796 *filter_ctx = ret;
00797 return 0;
00798
00799 err:
00800 av_freep(&ret->inputs);
00801 av_freep(&ret->input_pads);
00802 ret->input_count = 0;
00803 av_freep(&ret->outputs);
00804 av_freep(&ret->output_pads);
00805 ret->output_count = 0;
00806 av_freep(&ret->priv);
00807 av_free(ret);
00808 return AVERROR(ENOMEM);
00809 }
00810
00811 void avfilter_free(AVFilterContext *filter)
00812 {
00813 int i;
00814 AVFilterLink *link;
00815
00816 if (filter->filter->uninit)
00817 filter->filter->uninit(filter);
00818
00819 for (i = 0; i < filter->input_count; i++) {
00820 if ((link = filter->inputs[i])) {
00821 if (link->src)
00822 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
00823 avfilter_formats_unref(&link->in_formats);
00824 avfilter_formats_unref(&link->out_formats);
00825 }
00826 avfilter_link_free(&link);
00827 }
00828 for (i = 0; i < filter->output_count; i++) {
00829 if ((link = filter->outputs[i])) {
00830 if (link->dst)
00831 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
00832 avfilter_formats_unref(&link->in_formats);
00833 avfilter_formats_unref(&link->out_formats);
00834 }
00835 avfilter_link_free(&link);
00836 }
00837
00838 av_freep(&filter->name);
00839 av_freep(&filter->input_pads);
00840 av_freep(&filter->output_pads);
00841 av_freep(&filter->inputs);
00842 av_freep(&filter->outputs);
00843 av_freep(&filter->priv);
00844 while(filter->command_queue){
00845 command_queue_pop(filter);
00846 }
00847 av_free(filter);
00848 }
00849
00850 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
00851 {
00852 int ret=0;
00853
00854 if (filter->filter->init)
00855 ret = filter->filter->init(filter, args, opaque);
00856 return ret;
00857 }
00858
