mirror of https://github.com/FFmpeg/FFmpeg.git
This is easier to follow than having them randomly scattered in avfilter.c and defaults.c.pull/30/merge
Anton Khirnov
13 years ago
parent
7abf789975
commit
c5432d3ca4
4 changed files with 295 additions and 271 deletions
@ -0,0 +1,294 @@ |
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/*
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/imgutils.h" |
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#include "avfilter.h" |
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#include "internal.h" |
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static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end) |
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{ |
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av_unused char buf[16]; |
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av_dlog(ctx, |
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"ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64, |
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ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0], |
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ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3], |
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ref->pts, ref->pos); |
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if (ref->video) { |
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av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c", |
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ref->video->pixel_aspect.num, ref->video->pixel_aspect.den, |
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ref->video->w, ref->video->h, |
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!ref->video->interlaced ? 'P' : /* Progressive */ |
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ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */ |
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ref->video->key_frame, |
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av_get_picture_type_char(ref->video->pict_type)); |
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} |
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if (ref->audio) { |
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av_dlog(ctx, " cl:%"PRId64"d n:%d r:%d p:%d", |
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ref->audio->channel_layout, |
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ref->audio->nb_samples, |
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ref->audio->sample_rate, |
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ref->audio->planar); |
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} |
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av_dlog(ctx, "]%s", end ? "\n" : ""); |
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} |
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AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h) |
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{ |
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return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h); |
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} |
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/* TODO: set the buffer's priv member to a context structure for the whole
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* filter chain. This will allow for a buffer pool instead of the constant |
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* alloc & free cycle currently implemented. */ |
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AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h) |
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{ |
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int linesize[4]; |
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uint8_t *data[4]; |
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AVFilterBufferRef *picref = NULL; |
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// +2 is needed for swscaler, +16 to be SIMD-friendly
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if (av_image_alloc(data, linesize, w, h, link->format, 16) < 0) |
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return NULL; |
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picref = avfilter_get_video_buffer_ref_from_arrays(data, linesize, |
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perms, w, h, link->format); |
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if (!picref) { |
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av_free(data[0]); |
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return NULL; |
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} |
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return picref; |
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} |
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AVFilterBufferRef * |
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avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms, |
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int w, int h, enum PixelFormat format) |
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{ |
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AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer)); |
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AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef)); |
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if (!pic || !picref) |
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goto fail; |
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picref->buf = pic; |
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picref->buf->free = ff_avfilter_default_free_buffer; |
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if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps)))) |
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goto fail; |
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pic->w = picref->video->w = w; |
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pic->h = picref->video->h = h; |
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/* make sure the buffer gets read permission or it's useless for output */ |
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picref->perms = perms | AV_PERM_READ; |
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pic->refcount = 1; |
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picref->type = AVMEDIA_TYPE_VIDEO; |
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pic->format = picref->format = format; |
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memcpy(pic->data, data, 4*sizeof(data[0])); |
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memcpy(pic->linesize, linesize, 4*sizeof(linesize[0])); |
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memcpy(picref->data, pic->data, sizeof(picref->data)); |
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memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize)); |
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pic-> extended_data = pic->data; |
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picref->extended_data = picref->data; |
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return picref; |
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fail: |
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if (picref && picref->video) |
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av_free(picref->video); |
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av_free(picref); |
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av_free(pic); |
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return NULL; |
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} |
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AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h) |
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{ |
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AVFilterBufferRef *ret = NULL; |
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av_unused char buf[16]; |
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FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); |
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av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h); |
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if (link->dstpad->get_video_buffer) |
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ret = link->dstpad->get_video_buffer(link, perms, w, h); |
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if (!ret) |
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ret = avfilter_default_get_video_buffer(link, perms, w, h); |
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if (ret) |
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ret->type = AVMEDIA_TYPE_VIDEO; |
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FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1); |
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return ret; |
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} |
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void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref) |
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{ |
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avfilter_start_frame(link->dst->outputs[0], picref); |
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} |
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void avfilter_default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref) |
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{ |
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AVFilterLink *outlink = NULL; |
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if (inlink->dst->output_count) |
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outlink = inlink->dst->outputs[0]; |
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if (outlink) { |
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outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h); |
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avfilter_copy_buffer_ref_props(outlink->out_buf, picref); |
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avfilter_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0)); |
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} |
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} |
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/* XXX: should we do the duplicating of the picture ref here, instead of
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* forcing the source filter to do it? */ |
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void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref) |
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{ |
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void (*start_frame)(AVFilterLink *, AVFilterBufferRef *); |
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AVFilterPad *dst = link->dstpad; |
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int perms = picref->perms; |
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FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1); |
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if (!(start_frame = dst->start_frame)) |
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start_frame = avfilter_default_start_frame; |
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if (picref->linesize[0] < 0) |
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perms |= AV_PERM_NEG_LINESIZES; |
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/* prepare to copy the picture if it has insufficient permissions */ |
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if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) { |
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av_log(link->dst, AV_LOG_DEBUG, |
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"frame copy needed (have perms %x, need %x, reject %x)\n", |
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picref->perms, |
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link->dstpad->min_perms, link->dstpad->rej_perms); |
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link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h); |
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link->src_buf = picref; |
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avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf); |
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} |
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else |
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link->cur_buf = picref; |
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start_frame(link, link->cur_buf); |
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} |
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void avfilter_null_end_frame(AVFilterLink *link) |
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{ |
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avfilter_end_frame(link->dst->outputs[0]); |
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} |
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void avfilter_default_end_frame(AVFilterLink *inlink) |
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{ |
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AVFilterLink *outlink = NULL; |
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if (inlink->dst->output_count) |
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outlink = inlink->dst->outputs[0]; |
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avfilter_unref_buffer(inlink->cur_buf); |
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inlink->cur_buf = NULL; |
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if (outlink) { |
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if (outlink->out_buf) { |
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avfilter_unref_buffer(outlink->out_buf); |
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outlink->out_buf = NULL; |
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} |
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avfilter_end_frame(outlink); |
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} |
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} |
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void avfilter_end_frame(AVFilterLink *link) |
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{ |
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void (*end_frame)(AVFilterLink *); |
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if (!(end_frame = link->dstpad->end_frame)) |
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end_frame = avfilter_default_end_frame; |
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end_frame(link); |
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/* unreference the source picture if we're feeding the destination filter
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* a copied version dues to permission issues */ |
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if (link->src_buf) { |
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avfilter_unref_buffer(link->src_buf); |
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link->src_buf = NULL; |
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} |
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} |
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void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) |
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{ |
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avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir); |
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} |
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void avfilter_default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) |
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{ |
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AVFilterLink *outlink = NULL; |
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if (inlink->dst->output_count) |
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outlink = inlink->dst->outputs[0]; |
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if (outlink) |
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avfilter_draw_slice(outlink, y, h, slice_dir); |
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} |
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void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) |
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{ |
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uint8_t *src[4], *dst[4]; |
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int i, j, vsub; |
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void (*draw_slice)(AVFilterLink *, int, int, int); |
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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); |
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/* copy the slice if needed for permission reasons */ |
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if (link->src_buf) { |
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vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h; |
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for (i = 0; i < 4; i++) { |
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if (link->src_buf->data[i]) { |
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src[i] = link->src_buf-> data[i] + |
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(y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i]; |
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dst[i] = link->cur_buf->data[i] + |
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(y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i]; |
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} else |
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src[i] = dst[i] = NULL; |
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} |
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for (i = 0; i < 4; i++) { |
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int planew = |
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av_image_get_linesize(link->format, link->cur_buf->video->w, i); |
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if (!src[i]) continue; |
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for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) { |
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memcpy(dst[i], src[i], planew); |
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src[i] += link->src_buf->linesize[i]; |
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dst[i] += link->cur_buf->linesize[i]; |
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} |
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} |
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} |
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if (!(draw_slice = link->dstpad->draw_slice)) |
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draw_slice = avfilter_default_draw_slice; |
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draw_slice(link, y, h, slice_dir); |
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} |
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