| /* |
| * filter layer |
| * Copyright (c) 2007 Bobby Bingham |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* #define DEBUG */ |
| |
| #include "libavutil/pixdesc.h" |
| #include "libavutil/rational.h" |
| #include "libavutil/audioconvert.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/avstring.h" |
| #include "avfilter.h" |
| #include "internal.h" |
| |
| unsigned avfilter_version(void) { |
| av_assert0(LIBAVFILTER_VERSION_MICRO >= 100); |
| return LIBAVFILTER_VERSION_INT; |
| } |
| |
| const char *avfilter_configuration(void) |
| { |
| return FFMPEG_CONFIGURATION; |
| } |
| |
| const char *avfilter_license(void) |
| { |
| #define LICENSE_PREFIX "libavfilter license: " |
| return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; |
| } |
| |
| static void command_queue_pop(AVFilterContext *filter) |
| { |
| AVFilterCommand *c= filter->command_queue; |
| av_freep(&c->arg); |
| av_freep(&c->command); |
| filter->command_queue= c->next; |
| av_free(c); |
| } |
| |
| AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask) |
| { |
| AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef)); |
| if (!ret) |
| return NULL; |
| *ret = *ref; |
| if (ref->type == AVMEDIA_TYPE_VIDEO) { |
| ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps)); |
| if (!ret->video) { |
| av_free(ret); |
| return NULL; |
| } |
| *ret->video = *ref->video; |
| } else if (ref->type == AVMEDIA_TYPE_AUDIO) { |
| ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps)); |
| if (!ret->audio) { |
| av_free(ret); |
| return NULL; |
| } |
| *ret->audio = *ref->audio; |
| } |
| ret->perms &= pmask; |
| ret->buf->refcount ++; |
| return ret; |
| } |
| |
| static void free_pool(AVFilterPool *pool) |
| { |
| int i; |
| |
| av_assert0(pool->refcount > 0); |
| |
| for (i = 0; i < POOL_SIZE; i++) { |
| if (pool->pic[i]) { |
| AVFilterBufferRef *picref = pool->pic[i]; |
| /* free buffer: picrefs stored in the pool are not |
| * supposed to contain a free callback */ |
| av_assert0(!picref->buf->refcount); |
| av_freep(&picref->buf->data[0]); |
| av_freep(&picref->buf); |
| |
| av_freep(&picref->audio); |
| av_freep(&picref->video); |
| av_freep(&pool->pic[i]); |
| pool->count--; |
| } |
| } |
| pool->draining = 1; |
| |
| if (!--pool->refcount) { |
| av_assert0(!pool->count); |
| av_free(pool); |
| } |
| } |
| |
| static void store_in_pool(AVFilterBufferRef *ref) |
| { |
| int i; |
| AVFilterPool *pool= ref->buf->priv; |
| |
| av_assert0(ref->buf->data[0]); |
| av_assert0(pool->refcount>0); |
| |
| if (pool->count == POOL_SIZE) { |
| AVFilterBufferRef *ref1 = pool->pic[0]; |
| av_freep(&ref1->video); |
| av_freep(&ref1->audio); |
| av_freep(&ref1->buf->data[0]); |
| av_freep(&ref1->buf); |
| av_free(ref1); |
| memmove(&pool->pic[0], &pool->pic[1], sizeof(void*)*(POOL_SIZE-1)); |
| pool->count--; |
| pool->pic[POOL_SIZE-1] = NULL; |
| } |
| |
| for (i = 0; i < POOL_SIZE; i++) { |
| if (!pool->pic[i]) { |
| pool->pic[i] = ref; |
| pool->count++; |
| break; |
| } |
| } |
| if (pool->draining) { |
| free_pool(pool); |
| } else |
| --pool->refcount; |
| } |
| |
| void avfilter_unref_buffer(AVFilterBufferRef *ref) |
| { |
| if (!ref) |
| return; |
| av_assert0(ref->buf->refcount > 0); |
| if (!(--ref->buf->refcount)) { |
| if (!ref->buf->free) { |
| store_in_pool(ref); |
| return; |
| } |
| ref->buf->free(ref->buf); |
| } |
| av_freep(&ref->video); |
| av_freep(&ref->audio); |
| av_free(ref); |
| } |
| |
| void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off, |
| AVFilterPad **pads, AVFilterLink ***links, |
| AVFilterPad *newpad) |
| { |
| unsigned i; |
| |
| idx = FFMIN(idx, *count); |
| |
| *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1)); |
| *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1)); |
| memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx)); |
| memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx)); |
| memcpy(*pads+idx, newpad, sizeof(AVFilterPad)); |
| (*links)[idx] = NULL; |
| |
| (*count)++; |
| for (i = idx + 1; i < *count; i++) |
| if ((*links)[i]) |
| (*(unsigned *)((uint8_t *) (*links)[i] + padidx_off))++; |
| } |
| |
| int avfilter_link(AVFilterContext *src, unsigned srcpad, |
| AVFilterContext *dst, unsigned dstpad) |
| { |
| AVFilterLink *link; |
| |
| if (src->output_count <= srcpad || dst->input_count <= dstpad || |
| src->outputs[srcpad] || dst->inputs[dstpad]) |
| return -1; |
| |
| if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) { |
| av_log(src, AV_LOG_ERROR, |
| "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n", |
| src->name, srcpad, dst->name, dstpad); |
| return AVERROR(EINVAL); |
| } |
| |
| src->outputs[srcpad] = |
| dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink)); |
| |
| link->src = src; |
| link->dst = dst; |
| link->srcpad = &src->output_pads[srcpad]; |
| link->dstpad = &dst->input_pads[dstpad]; |
| link->type = src->output_pads[srcpad].type; |
| assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1); |
| link->format = -1; |
| |
| return 0; |
| } |
| |
| void avfilter_link_free(AVFilterLink **link) |
| { |
| if (!*link) |
| return; |
| |
| if ((*link)->pool) |
| free_pool((*link)->pool); |
| |
| av_freep(link); |
| } |
| |
| int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt, |
| unsigned filt_srcpad_idx, unsigned filt_dstpad_idx) |
| { |
| int ret; |
| unsigned dstpad_idx = link->dstpad - link->dst->input_pads; |
| |
| av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' " |
| "between the filter '%s' and the filter '%s'\n", |
| filt->name, link->src->name, link->dst->name); |
| |
| link->dst->inputs[dstpad_idx] = NULL; |
| if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) { |
| /* failed to link output filter to new filter */ |
| link->dst->inputs[dstpad_idx] = link; |
| return ret; |
| } |
| |
| /* re-hookup the link to the new destination filter we inserted */ |
| link->dst = filt; |
| link->dstpad = &filt->input_pads[filt_srcpad_idx]; |
| filt->inputs[filt_srcpad_idx] = link; |
| |
| /* if any information on supported media formats already exists on the |
| * link, we need to preserve that */ |
| if (link->out_formats) |
| avfilter_formats_changeref(&link->out_formats, |
| &filt->outputs[filt_dstpad_idx]->out_formats); |
| if (link->out_chlayouts) |
| avfilter_formats_changeref(&link->out_chlayouts, |
| &filt->outputs[filt_dstpad_idx]->out_chlayouts); |
| if (link->out_packing) |
| avfilter_formats_changeref(&link->out_packing, |
| &filt->outputs[filt_dstpad_idx]->out_packing); |
| |
| return 0; |
| } |
| |
| int avfilter_config_links(AVFilterContext *filter) |
| { |
| int (*config_link)(AVFilterLink *); |
| unsigned i; |
| int ret; |
| |
| for (i = 0; i < filter->input_count; i ++) { |
| AVFilterLink *link = filter->inputs[i]; |
| AVFilterLink *inlink = link->src->input_count ? |
| link->src->inputs[0] : NULL; |
| |
| if (!link) continue; |
| |
| switch (link->init_state) { |
| case AVLINK_INIT: |
| continue; |
| case AVLINK_STARTINIT: |
| av_log(filter, AV_LOG_INFO, "circular filter chain detected\n"); |
| return 0; |
| case AVLINK_UNINIT: |
| link->init_state = AVLINK_STARTINIT; |
| |
| if ((ret = avfilter_config_links(link->src)) < 0) |
| return ret; |
| |
| if (!(config_link = link->srcpad->config_props)) { |
| if (link->src->input_count != 1) { |
| av_log(link->src, AV_LOG_ERROR, "Source filters and filters " |
| "with more than one input " |
| "must set config_props() " |
| "callbacks on all outputs\n"); |
| return AVERROR(EINVAL); |
| } |
| } else if ((ret = config_link(link)) < 0) |
| return ret; |
| |
| switch (link->type) { |
| case AVMEDIA_TYPE_VIDEO: |
| if (!link->time_base.num && !link->time_base.den) |
| link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q; |
| |
| if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den) |
| link->sample_aspect_ratio = inlink ? |
| inlink->sample_aspect_ratio : (AVRational){1,1}; |
| |
| if (inlink) { |
| if (!link->w) |
| link->w = inlink->w; |
| if (!link->h) |
| link->h = inlink->h; |
| } else if (!link->w || !link->h) { |
| av_log(link->src, AV_LOG_ERROR, |
| "Video source filters must set their output link's " |
| "width and height\n"); |
| return AVERROR(EINVAL); |
| } |
| break; |
| |
| case AVMEDIA_TYPE_AUDIO: |
| if (inlink) { |
| if (!link->sample_rate) |
| link->sample_rate = inlink->sample_rate; |
| if (!link->time_base.num && !link->time_base.den) |
| link->time_base = inlink->time_base; |
| } else if (!link->sample_rate) { |
| av_log(link->src, AV_LOG_ERROR, |
| "Audio source filters must set their output link's " |
| "sample_rate\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if (!link->time_base.num && !link->time_base.den) |
| link->time_base = (AVRational) {1, link->sample_rate}; |
| } |
| |
| if ((config_link = link->dstpad->config_props)) |
| if ((ret = config_link(link)) < 0) |
| return ret; |
| |
| link->init_state = AVLINK_INIT; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms) |
| { |
| snprintf(buf, buf_size, "%s%s%s%s%s%s", |
| perms & AV_PERM_READ ? "r" : "", |
| perms & AV_PERM_WRITE ? "w" : "", |
| perms & AV_PERM_PRESERVE ? "p" : "", |
| perms & AV_PERM_REUSE ? "u" : "", |
| perms & AV_PERM_REUSE2 ? "U" : "", |
| perms & AV_PERM_NEG_LINESIZES ? "n" : ""); |
| return buf; |
| } |
| |
| static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end) |
| { |
| av_unused char buf[16]; |
| av_dlog(ctx, |
| "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64, |
| ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0], |
| ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3], |
| ref->pts, ref->pos); |
| |
| if (ref->video) { |
| av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c", |
| ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den, |
| ref->video->w, ref->video->h, |
| !ref->video->interlaced ? 'P' : /* Progressive */ |
| ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */ |
| ref->video->key_frame, |
| av_get_picture_type_char(ref->video->pict_type)); |
| } |
| if (ref->audio) { |
| av_dlog(ctx, " cl:%"PRId64"d n:%d r:%d p:%d", |
| ref->audio->channel_layout, |
| ref->audio->nb_samples, |
| ref->audio->sample_rate, |
| ref->audio->planar); |
| } |
| |
| av_dlog(ctx, "]%s", end ? "\n" : ""); |
| } |
| |
| static void ff_dlog_link(void *ctx, AVFilterLink *link, int end) |
| { |
| if (link->type == AVMEDIA_TYPE_VIDEO) { |
| av_dlog(ctx, |
| "link[%p s:%dx%d fmt:%s %s->%s]%s", |
| link, link->w, link->h, |
| av_pix_fmt_descriptors[link->format].name, |
| link->src ? link->src->filter->name : "", |
| link->dst ? link->dst->filter->name : "", |
| end ? "\n" : ""); |
| } else { |
| char buf[128]; |
| av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout); |
| |
| av_dlog(ctx, |
| "link[%p r:%d cl:%s fmt:%s %s->%s]%s", |
| link, (int)link->sample_rate, buf, |
| av_get_sample_fmt_name(link->format), |
| link->src ? link->src->filter->name : "", |
| link->dst ? link->dst->filter->name : "", |
| end ? "\n" : ""); |
| } |
| } |
| |
| #define FF_DPRINTF_START(ctx, func) av_dlog(NULL, "%-16s: ", #func) |
| |
| AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h) |
| { |
| AVFilterBufferRef *ret = NULL; |
| |
| av_unused char buf[16]; |
| FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); |
| av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h); |
| |
| if (link->dstpad->get_video_buffer) |
| ret = link->dstpad->get_video_buffer(link, perms, w, h); |
| |
| if (!ret) |
| ret = avfilter_default_get_video_buffer(link, perms, w, h); |
| |
| if (ret) |
| ret->type = AVMEDIA_TYPE_VIDEO; |
| |
| FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1); |
| |
| return ret; |
| } |
| |
| AVFilterBufferRef * |
| avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms, |
| int w, int h, enum PixelFormat format) |
| { |
| AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer)); |
| AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef)); |
| |
| if (!pic || !picref) |
| goto fail; |
| |
| picref->buf = pic; |
| picref->buf->free = ff_avfilter_default_free_buffer; |
| if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps)))) |
| goto fail; |
| |
| pic->w = picref->video->w = w; |
| pic->h = picref->video->h = h; |
| |
| /* make sure the buffer gets read permission or it's useless for output */ |
| picref->perms = perms | AV_PERM_READ; |
| |
| pic->refcount = 1; |
| picref->type = AVMEDIA_TYPE_VIDEO; |
| pic->format = picref->format = format; |
| |
| memcpy(pic->data, data, 4*sizeof(data[0])); |
| memcpy(pic->linesize, linesize, 4*sizeof(linesize[0])); |
| memcpy(picref->data, pic->data, sizeof(picref->data)); |
| memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize)); |
| |
| return picref; |
| |
| fail: |
| if (picref && picref->video) |
| av_free(picref->video); |
| av_free(picref); |
| av_free(pic); |
| return NULL; |
| } |
| |
| AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, |
| int perms, int nb_samples) |
| { |
| AVFilterBufferRef *ret = NULL; |
| |
| if (link->dstpad->get_audio_buffer) |
| ret = link->dstpad->get_audio_buffer(link, perms, nb_samples); |
| |
| if (!ret) |
| ret = avfilter_default_get_audio_buffer(link, perms, nb_samples); |
| |
| if (ret) |
| ret->type = AVMEDIA_TYPE_AUDIO; |
| |
| return ret; |
| } |
| |
| AVFilterBufferRef * |
| avfilter_get_audio_buffer_ref_from_arrays(uint8_t *data[8], int linesize[8], int perms, |
| int nb_samples, enum AVSampleFormat sample_fmt, |
| uint64_t channel_layout, int planar) |
| { |
| AVFilterBuffer *samples = av_mallocz(sizeof(AVFilterBuffer)); |
| AVFilterBufferRef *samplesref = av_mallocz(sizeof(AVFilterBufferRef)); |
| |
| if (!samples || !samplesref) |
| goto fail; |
| |
| samplesref->buf = samples; |
| samplesref->buf->free = ff_avfilter_default_free_buffer; |
| if (!(samplesref->audio = av_mallocz(sizeof(AVFilterBufferRefAudioProps)))) |
| goto fail; |
| |
| samplesref->audio->nb_samples = nb_samples; |
| samplesref->audio->channel_layout = channel_layout; |
| samplesref->audio->planar = planar; |
| |
| /* make sure the buffer gets read permission or it's useless for output */ |
| samplesref->perms = perms | AV_PERM_READ; |
| |
| samples->refcount = 1; |
| samplesref->type = AVMEDIA_TYPE_AUDIO; |
| samplesref->format = sample_fmt; |
| |
| memcpy(samples->data, data, sizeof(samples->data)); |
| memcpy(samples->linesize, linesize, sizeof(samples->linesize)); |
| memcpy(samplesref->data, data, sizeof(samplesref->data)); |
| memcpy(samplesref->linesize, linesize, sizeof(samplesref->linesize)); |
| |
| return samplesref; |
| |
| fail: |
| if (samplesref && samplesref->audio) |
| av_freep(&samplesref->audio); |
| av_freep(&samplesref); |
| av_freep(&samples); |
| return NULL; |
| } |
| |
| int avfilter_request_frame(AVFilterLink *link) |
| { |
| FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1); |
| |
| if (link->srcpad->request_frame) |
| return link->srcpad->request_frame(link); |
| else if (link->src->inputs[0]) |
| return avfilter_request_frame(link->src->inputs[0]); |
| else return -1; |
| } |
| |
| int avfilter_poll_frame(AVFilterLink *link) |
| { |
| int i, min = INT_MAX; |
| |
| if (link->srcpad->poll_frame) |
| return link->srcpad->poll_frame(link); |
| |
| for (i = 0; i < link->src->input_count; i++) { |
| int val; |
| if (!link->src->inputs[i]) |
| return -1; |
| val = avfilter_poll_frame(link->src->inputs[i]); |
| min = FFMIN(min, val); |
| } |
| |
| return min; |
| } |
| |
| /* XXX: should we do the duplicating of the picture ref here, instead of |
| * forcing the source filter to do it? */ |
| void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref) |
| { |
| void (*start_frame)(AVFilterLink *, AVFilterBufferRef *); |
| AVFilterPad *dst = link->dstpad; |
| int perms = picref->perms; |
| AVFilterCommand *cmd= link->dst->command_queue; |
| |
| FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1); |
| |
| if (!(start_frame = dst->start_frame)) |
| start_frame = avfilter_default_start_frame; |
| |
| if (picref->linesize[0] < 0) |
| perms |= AV_PERM_NEG_LINESIZES; |
| /* prepare to copy the picture if it has insufficient permissions */ |
| if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) { |
| av_log(link->dst, AV_LOG_DEBUG, |
| "frame copy needed (have perms %x, need %x, reject %x)\n", |
| picref->perms, |
| link->dstpad->min_perms, link->dstpad->rej_perms); |
| |
| link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h); |
| link->src_buf = picref; |
| avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf); |
| } |
| else |
| link->cur_buf = picref; |
| |
| while(cmd && cmd->time <= picref->pts * av_q2d(link->time_base)){ |
| av_log(link->dst, AV_LOG_DEBUG, |
| "Processing command time:%f command:%s arg:%s\n", |
| cmd->time, cmd->command, cmd->arg); |
| avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags); |
| command_queue_pop(link->dst); |
| cmd= link->dst->command_queue; |
| } |
| |
| start_frame(link, link->cur_buf); |
| } |
| |
| void avfilter_end_frame(AVFilterLink *link) |
| { |
| void (*end_frame)(AVFilterLink *); |
| |
| if (!(end_frame = link->dstpad->end_frame)) |
| end_frame = avfilter_default_end_frame; |
| |
| end_frame(link); |
| |
| /* unreference the source picture if we're feeding the destination filter |
| * a copied version dues to permission issues */ |
| if (link->src_buf) { |
| avfilter_unref_buffer(link->src_buf); |
| link->src_buf = NULL; |
| } |
| } |
| |
| void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) |
| { |
| uint8_t *src[4], *dst[4]; |
| int i, j, vsub; |
| void (*draw_slice)(AVFilterLink *, int, int, int); |
| |
| 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); |
| |
| /* copy the slice if needed for permission reasons */ |
| if (link->src_buf) { |
| vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h; |
| |
| for (i = 0; i < 4; i++) { |
| if (link->src_buf->data[i]) { |
| src[i] = link->src_buf-> data[i] + |
| (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i]; |
| dst[i] = link->cur_buf->data[i] + |
| (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i]; |
| } else |
| src[i] = dst[i] = NULL; |
| } |
| |
| for (i = 0; i < 4; i++) { |
| int planew = |
| av_image_get_linesize(link->format, link->cur_buf->video->w, i); |
| |
| if (!src[i]) continue; |
| |
| for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) { |
| memcpy(dst[i], src[i], planew); |
| src[i] += link->src_buf->linesize[i]; |
| dst[i] += link->cur_buf->linesize[i]; |
| } |
| } |
| } |
| |
| if (!(draw_slice = link->dstpad->draw_slice)) |
| draw_slice = avfilter_default_draw_slice; |
| draw_slice(link, y, h, slice_dir); |
| } |
| |
| int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags) |
| { |
| if(!strcmp(cmd, "ping")){ |
| av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name); |
| return 0; |
| }else if(filter->filter->process_command) { |
| return filter->filter->process_command(filter, cmd, arg, res, res_len, flags); |
| } |
| return AVERROR(ENOSYS); |
| } |
| |
| void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref) |
| { |
| void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *); |
| AVFilterPad *dst = link->dstpad; |
| int i; |
| |
| FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1); |
| |
| if (!(filter_samples = dst->filter_samples)) |
| filter_samples = avfilter_default_filter_samples; |
| |
| /* prepare to copy the samples if the buffer has insufficient permissions */ |
| if ((dst->min_perms & samplesref->perms) != dst->min_perms || |
| dst->rej_perms & samplesref->perms) { |
| |
| av_log(link->dst, AV_LOG_DEBUG, |
| "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n", |
| samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms); |
| |
| link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms, |
| samplesref->audio->nb_samples); |
| link->cur_buf->pts = samplesref->pts; |
| link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate; |
| |
| /* Copy actual data into new samples buffer */ |
| for (i = 0; samplesref->data[i] && i < 8; i++) |
| memcpy(link->cur_buf->data[i], samplesref->data[i], samplesref->linesize[0]); |
| |
| avfilter_unref_buffer(samplesref); |
| } else |
| link->cur_buf = samplesref; |
| |
| filter_samples(link, link->cur_buf); |
| } |
| |
| #define MAX_REGISTERED_AVFILTERS_NB 128 |
| |
| static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1]; |
| |
| static int next_registered_avfilter_idx = 0; |
| |
| AVFilter *avfilter_get_by_name(const char *name) |
| { |
| int i; |
| |
| for (i = 0; registered_avfilters[i]; i++) |
| if (!strcmp(registered_avfilters[i]->name, name)) |
| return registered_avfilters[i]; |
| |
| return NULL; |
| } |
| |
| int avfilter_register(AVFilter *filter) |
| { |
| if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) { |
| av_log(NULL, AV_LOG_ERROR, |
| "Maximum number of registered filters %d reached, " |
| "impossible to register filter with name '%s'\n", |
| MAX_REGISTERED_AVFILTERS_NB, filter->name); |
| return AVERROR(ENOMEM); |
| } |
| |
| registered_avfilters[next_registered_avfilter_idx++] = filter; |
| return 0; |
| } |
| |
| AVFilter **av_filter_next(AVFilter **filter) |
| { |
| return filter ? ++filter : ®istered_avfilters[0]; |
| } |
| |
| void avfilter_uninit(void) |
| { |
| memset(registered_avfilters, 0, sizeof(registered_avfilters)); |
| next_registered_avfilter_idx = 0; |
| } |
| |
| static int pad_count(const AVFilterPad *pads) |
| { |
| int count; |
| |
| for(count = 0; pads->name; count ++) pads ++; |
| return count; |
| } |
| |
| static const char *filter_name(void *p) |
| { |
| AVFilterContext *filter = p; |
| return filter->filter->name; |
| } |
| |
| static const AVClass avfilter_class = { |
| "AVFilter", |
| filter_name, |
| NULL, |
| LIBAVUTIL_VERSION_INT, |
| }; |
| |
| int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name) |
| { |
| AVFilterContext *ret; |
| *filter_ctx = NULL; |
| |
| if (!filter) |
| return AVERROR(EINVAL); |
| |
| ret = av_mallocz(sizeof(AVFilterContext)); |
| if (!ret) |
| return AVERROR(ENOMEM); |
| |
| ret->av_class = &avfilter_class; |
| ret->filter = filter; |
| ret->name = inst_name ? av_strdup(inst_name) : NULL; |
| if (filter->priv_size) { |
| ret->priv = av_mallocz(filter->priv_size); |
| if (!ret->priv) |
| goto err; |
| } |
| |
| ret->input_count = pad_count(filter->inputs); |
| if (ret->input_count) { |
| ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count); |
| if (!ret->input_pads) |
| goto err; |
| memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count); |
| ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count); |
| if (!ret->inputs) |
| goto err; |
| } |
| |
| ret->output_count = pad_count(filter->outputs); |
| if (ret->output_count) { |
| ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count); |
| if (!ret->output_pads) |
| goto err; |
| memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count); |
| ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count); |
| if (!ret->outputs) |
| goto err; |
| } |
| |
| *filter_ctx = ret; |
| return 0; |
| |
| err: |
| av_freep(&ret->inputs); |
| av_freep(&ret->input_pads); |
| ret->input_count = 0; |
| av_freep(&ret->outputs); |
| av_freep(&ret->output_pads); |
| ret->output_count = 0; |
| av_freep(&ret->priv); |
| av_free(ret); |
| return AVERROR(ENOMEM); |
| } |
| |
| void avfilter_free(AVFilterContext *filter) |
| { |
| int i; |
| AVFilterLink *link; |
| |
| if (filter->filter->uninit) |
| filter->filter->uninit(filter); |
| |
| for (i = 0; i < filter->input_count; i++) { |
| if ((link = filter->inputs[i])) { |
| if (link->src) |
| link->src->outputs[link->srcpad - link->src->output_pads] = NULL; |
| avfilter_formats_unref(&link->in_formats); |
| avfilter_formats_unref(&link->out_formats); |
| } |
| avfilter_link_free(&link); |
| } |
| for (i = 0; i < filter->output_count; i++) { |
| if ((link = filter->outputs[i])) { |
| if (link->dst) |
| link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL; |
| avfilter_formats_unref(&link->in_formats); |
| avfilter_formats_unref(&link->out_formats); |
| } |
| avfilter_link_free(&link); |
| } |
| |
| av_freep(&filter->name); |
| av_freep(&filter->input_pads); |
| av_freep(&filter->output_pads); |
| av_freep(&filter->inputs); |
| av_freep(&filter->outputs); |
| av_freep(&filter->priv); |
| while(filter->command_queue){ |
| command_queue_pop(filter); |
| } |
| av_free(filter); |
| } |
| |
| int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque) |
| { |
| int ret=0; |
| |
| if (filter->filter->init) |
| ret = filter->filter->init(filter, args, opaque); |
| return ret; |
| } |
| |
