| /* |
| * Filter layer - default implementations |
| * 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 |
| */ |
| |
| #include "libavutil/audioconvert.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/samplefmt.h" |
| #include "avfilter.h" |
| #include "internal.h" |
| |
| void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr) |
| { |
| av_free(ptr->data[0]); |
| av_free(ptr); |
| } |
| |
| /* TODO: set the buffer's priv member to a context structure for the whole |
| * filter chain. This will allow for a buffer pool instead of the constant |
| * alloc & free cycle currently implemented. */ |
| AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h) |
| { |
| int linesize[4]; |
| uint8_t *data[4]; |
| int i; |
| AVFilterBufferRef *picref = NULL; |
| AVFilterPool *pool = link->pool; |
| |
| if (pool) { |
| for (i = 0; i < POOL_SIZE; i++) { |
| picref = pool->pic[i]; |
| if (picref && picref->buf->format == link->format && picref->buf->w == w && picref->buf->h == h) { |
| AVFilterBuffer *pic = picref->buf; |
| pool->pic[i] = NULL; |
| pool->count--; |
| picref->video->w = w; |
| picref->video->h = h; |
| picref->perms = perms | AV_PERM_READ; |
| picref->format = link->format; |
| pic->refcount = 1; |
| memcpy(picref->data, pic->data, sizeof(picref->data)); |
| memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize)); |
| return picref; |
| } |
| } |
| } else |
| pool = link->pool = av_mallocz(sizeof(AVFilterPool)); |
| |
| // align: +2 is needed for swscaler, +16 to be SIMD-friendly |
| if ((i = av_image_alloc(data, linesize, w, h, link->format, 16)) < 0) |
| return NULL; |
| |
| picref = avfilter_get_video_buffer_ref_from_arrays(data, linesize, |
| perms, w, h, link->format); |
| if (!picref) { |
| av_free(data[0]); |
| return NULL; |
| } |
| memset(data[0], 128, i); |
| |
| picref->buf->priv = pool; |
| picref->buf->free = NULL; |
| |
| return picref; |
| } |
| |
| AVFilterBufferRef *avfilter_default_get_audio_buffer(AVFilterLink *link, int perms, |
| enum AVSampleFormat sample_fmt, int nb_samples, |
| int64_t channel_layout, int planar) |
| { |
| AVFilterBufferRef *samplesref = NULL; |
| int linesize[8]; |
| uint8_t *data[8]; |
| int nb_channels = av_get_channel_layout_nb_channels(channel_layout); |
| |
| /* Calculate total buffer size, round to multiple of 16 to be SIMD friendly */ |
| if (av_samples_alloc(data, linesize, |
| nb_channels, nb_samples, sample_fmt, |
| planar, 16) < 0) |
| return NULL; |
| |
| samplesref = |
| avfilter_get_audio_buffer_ref_from_arrays(data, linesize, perms, |
| nb_samples, sample_fmt, |
| channel_layout, planar); |
| if (!samplesref) { |
| av_free(data[0]); |
| return NULL; |
| } |
| |
| return samplesref; |
| } |
| |
| void avfilter_default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref) |
| { |
| AVFilterLink *outlink = NULL; |
| |
| if (inlink->dst->output_count) |
| outlink = inlink->dst->outputs[0]; |
| |
| if (outlink) { |
| outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h); |
| avfilter_copy_buffer_ref_props(outlink->out_buf, picref); |
| avfilter_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0)); |
| } |
| } |
| |
| void avfilter_default_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) |
| { |
| AVFilterLink *outlink = NULL; |
| |
| if (inlink->dst->output_count) |
| outlink = inlink->dst->outputs[0]; |
| |
| if (outlink) |
| avfilter_draw_slice(outlink, y, h, slice_dir); |
| } |
| |
| void avfilter_default_end_frame(AVFilterLink *inlink) |
| { |
| AVFilterLink *outlink = NULL; |
| |
| if (inlink->dst->output_count) |
| outlink = inlink->dst->outputs[0]; |
| |
| avfilter_unref_buffer(inlink->cur_buf); |
| inlink->cur_buf = NULL; |
| |
| if (outlink) { |
| if (outlink->out_buf) { |
| avfilter_unref_buffer(outlink->out_buf); |
| outlink->out_buf = NULL; |
| } |
| avfilter_end_frame(outlink); |
| } |
| } |
| |
| /* FIXME: samplesref is same as link->cur_buf. Need to consider removing the redundant parameter. */ |
| void avfilter_default_filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref) |
| { |
| AVFilterLink *outlink = NULL; |
| |
| if (inlink->dst->output_count) |
| outlink = inlink->dst->outputs[0]; |
| |
| if (outlink) { |
| outlink->out_buf = avfilter_default_get_audio_buffer(inlink, AV_PERM_WRITE, samplesref->format, |
| samplesref->audio->nb_samples, |
| samplesref->audio->channel_layout, |
| samplesref->audio->planar); |
| outlink->out_buf->pts = samplesref->pts; |
| outlink->out_buf->audio->sample_rate = samplesref->audio->sample_rate; |
| avfilter_filter_samples(outlink, avfilter_ref_buffer(outlink->out_buf, ~0)); |
| avfilter_unref_buffer(outlink->out_buf); |
| outlink->out_buf = NULL; |
| } |
| avfilter_unref_buffer(samplesref); |
| inlink->cur_buf = NULL; |
| } |
| |
| /** |
| * default config_link() implementation for output video links to simplify |
| * the implementation of one input one output video filters */ |
| int avfilter_default_config_output_link(AVFilterLink *link) |
| { |
| if (link->src->input_count && link->src->inputs[0]) { |
| if (link->type == AVMEDIA_TYPE_VIDEO) { |
| link->w = link->src->inputs[0]->w; |
| link->h = link->src->inputs[0]->h; |
| link->time_base = link->src->inputs[0]->time_base; |
| } else if (link->type == AVMEDIA_TYPE_AUDIO) { |
| link->channel_layout = link->src->inputs[0]->channel_layout; |
| link->sample_rate = link->src->inputs[0]->sample_rate; |
| } |
| } else { |
| /* XXX: any non-simple filter which would cause this branch to be taken |
| * really should implement its own config_props() for this link. */ |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static void set_common_formats(AVFilterContext *ctx, AVFilterFormats *fmts, |
| enum AVMediaType type, int offin, int offout) |
| { |
| int i; |
| for (i = 0; i < ctx->input_count; i++) |
| if (ctx->inputs[i] && ctx->inputs[i]->type == type) |
| avfilter_formats_ref(fmts, |
| (AVFilterFormats**)((void*)ctx->inputs[i]+offout)); |
| |
| for (i = 0; i < ctx->output_count; i++) |
| if (ctx->outputs[i] && ctx->outputs[i]->type == type) |
| avfilter_formats_ref(fmts, |
| (AVFilterFormats**)((void*)ctx->outputs[i]+offin)); |
| |
| if (!fmts->refcount) { |
| av_free(fmts->formats); |
| av_free(fmts->refs); |
| av_free(fmts); |
| } |
| } |
| |
| void avfilter_set_common_pixel_formats(AVFilterContext *ctx, AVFilterFormats *formats) |
| { |
| set_common_formats(ctx, formats, AVMEDIA_TYPE_VIDEO, |
| offsetof(AVFilterLink, in_formats), |
| offsetof(AVFilterLink, out_formats)); |
| } |
| |
| void avfilter_set_common_sample_formats(AVFilterContext *ctx, AVFilterFormats *formats) |
| { |
| set_common_formats(ctx, formats, AVMEDIA_TYPE_AUDIO, |
| offsetof(AVFilterLink, in_formats), |
| offsetof(AVFilterLink, out_formats)); |
| } |
| |
| void avfilter_set_common_channel_layouts(AVFilterContext *ctx, AVFilterFormats *formats) |
| { |
| set_common_formats(ctx, formats, AVMEDIA_TYPE_AUDIO, |
| offsetof(AVFilterLink, in_chlayouts), |
| offsetof(AVFilterLink, out_chlayouts)); |
| } |
| |
| int avfilter_default_query_formats(AVFilterContext *ctx) |
| { |
| avfilter_set_common_pixel_formats(ctx, avfilter_all_formats(AVMEDIA_TYPE_VIDEO)); |
| avfilter_set_common_sample_formats(ctx, avfilter_all_formats(AVMEDIA_TYPE_AUDIO)); |
| avfilter_set_common_channel_layouts(ctx, avfilter_all_channel_layouts()); |
| |
| return 0; |
| } |
| |
| void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref) |
| { |
| avfilter_start_frame(link->dst->outputs[0], picref); |
| } |
| |
| void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) |
| { |
| avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir); |
| } |
| |
| void avfilter_null_end_frame(AVFilterLink *link) |
| { |
| avfilter_end_frame(link->dst->outputs[0]); |
| } |
| |
| void avfilter_null_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref) |
| { |
| avfilter_filter_samples(link->dst->outputs[0], samplesref); |
| } |
| |
| AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h) |
| { |
| return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h); |
| } |
| |
| AVFilterBufferRef *avfilter_null_get_audio_buffer(AVFilterLink *link, int perms, |
| enum AVSampleFormat sample_fmt, int size, |
| int64_t channel_layout, int packed) |
| { |
| return avfilter_get_audio_buffer(link->dst->outputs[0], perms, sample_fmt, |
| size, channel_layout, packed); |
| } |
| |