/*
* Filter layer - default implementations
- * copyright (c) 2007 Bobby Bingham
+ * Copyright (c) 2007 Bobby Bingham
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; 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"
/* TODO: buffer pool. see comment for avfilter_default_get_video_buffer() */
-void avfilter_default_free_video_buffer(AVFilterPic *pic)
+void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr)
{
- avpicture_free((AVPicture *) pic);
- av_free(pic);
+ 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. */
-AVFilterPicRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms)
+AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
{
- AVFilterPic *pic = av_mallocz(sizeof(AVFilterPic));
- AVFilterPicRef *ref = av_mallocz(sizeof(AVFilterPicRef));
+ int linesize[4];
+ uint8_t *data[4];
+ AVFilterBufferRef *picref = NULL;
- ref->pic = pic;
- ref->w = link->w;
- ref->h = link->h;
- ref->perms = perms;
+ // +2 is needed for swscaler, +16 to be SIMD-friendly
+ if (av_image_alloc(data, linesize, w, h, link->format, 16) < 0)
+ return NULL;
- pic->refcount = 1;
- pic->format = link->format;
- pic->free = avfilter_default_free_video_buffer;
- avpicture_alloc((AVPicture *)pic, pic->format, ref->w, ref->h);
+ picref = avfilter_get_video_buffer_ref_from_arrays(data, linesize,
+ perms, w, h, link->format);
+ if (!picref) {
+ av_free(data[0]);
+ return NULL;
+ }
+
+ return picref;
+}
+
+AVFilterBufferRef *avfilter_default_get_audio_buffer(AVFilterLink *link, int perms,
+ enum AVSampleFormat sample_fmt, int size,
+ int64_t channel_layout, int planar)
+{
+ AVFilterBuffer *samples = av_mallocz(sizeof(AVFilterBuffer));
+ AVFilterBufferRef *ref = NULL;
+ int i, sample_size, chans_nb, bufsize, per_channel_size, step_size = 0;
+ char *buf;
+
+ if (!samples || !(ref = av_mallocz(sizeof(AVFilterBufferRef))))
+ goto fail;
+
+ ref->buf = samples;
+ ref->format = sample_fmt;
+
+ ref->audio = av_mallocz(sizeof(AVFilterBufferRefAudioProps));
+ if (!ref->audio)
+ goto fail;
+
+ ref->audio->channel_layout = channel_layout;
+ ref->audio->size = size;
+ ref->audio->planar = planar;
- memcpy(ref->data, pic->data, sizeof(pic->data));
- memcpy(ref->linesize, pic->linesize, sizeof(pic->linesize));
+ /* make sure the buffer gets read permission or it's useless for output */
+ ref->perms = perms | AV_PERM_READ;
+
+ samples->refcount = 1;
+ samples->free = ff_avfilter_default_free_buffer;
+
+ sample_size = av_get_bytes_per_sample(sample_fmt);
+ chans_nb = av_get_channel_layout_nb_channels(channel_layout);
+
+ per_channel_size = size/chans_nb;
+ ref->audio->nb_samples = per_channel_size/sample_size;
+
+ /* Set the number of bytes to traverse to reach next sample of a particular channel:
+ * For planar, this is simply the sample size.
+ * For packed, this is the number of samples * sample_size.
+ */
+ for (i = 0; i < chans_nb; i++)
+ samples->linesize[i] = planar > 0 ? per_channel_size : sample_size;
+ memset(&samples->linesize[chans_nb], 0, (8-chans_nb) * sizeof(samples->linesize[0]));
+
+ /* Calculate total buffer size, round to multiple of 16 to be SIMD friendly */
+ bufsize = (size + 15)&~15;
+ buf = av_malloc(bufsize);
+ if (!buf)
+ goto fail;
+
+ /* For planar, set the start point of each channel's data within the buffer
+ * For packed, set the start point of the entire buffer only
+ */
+ samples->data[0] = buf;
+ if (buf && planar) {
+ for (i = 1; i < chans_nb; i++) {
+ step_size += per_channel_size;
+ samples->data[i] = buf + step_size;
+ }
+ } else {
+ for (i = 1; i < chans_nb; i++)
+ samples->data[i] = buf;
+ }
+
+ memset(&samples->data[chans_nb], 0, (8-chans_nb) * sizeof(samples->data[0]));
+
+ memcpy(ref->data, samples->data, sizeof(ref->data));
+ memcpy(ref->linesize, samples->linesize, sizeof(ref->linesize));
return ref;
+
+fail:
+ if (ref)
+ av_free(ref->audio);
+ av_free(ref);
+ av_free(samples);
+ return NULL;
}
-void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
+void avfilter_default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
{
- AVFilterLink *out = NULL;
+ AVFilterLink *outlink = NULL;
- if(link->dst->output_count)
- out = link->dst->outputs[0];
+ if (inlink->dst->output_count)
+ outlink = inlink->dst->outputs[0];
- if(out) {
- out->outpic = avfilter_get_video_buffer(out, AV_PERM_WRITE);
- out->outpic->pts = picref->pts;
- avfilter_start_frame(out, avfilter_ref_pic(out->outpic, ~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_end_frame(AVFilterLink *link)
+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 *out = NULL;
+ AVFilterLink *outlink = NULL;
- if(link->dst->output_count)
- out = link->dst->outputs[0];
+ if (inlink->dst->output_count)
+ outlink = inlink->dst->outputs[0];
- avfilter_unref_pic(link->cur_pic);
- link->cur_pic = NULL;
+ avfilter_unref_buffer(inlink->cur_buf);
+ inlink->cur_buf = NULL;
- if(out) {
- if(out->outpic) {
- avfilter_unref_pic(out->outpic);
- out->outpic = NULL;
+ if (outlink) {
+ if (outlink->out_buf) {
+ avfilter_unref_buffer(outlink->out_buf);
+ outlink->out_buf = NULL;
}
- avfilter_end_frame(out);
+ 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->size,
+ 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;
}
/**
* 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]) {
- link->w = link->src->inputs[0]->w;
- link->h = link->src->inputs[0]->h;
+ 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. */
- link->w =
- link->h = 0;
+ return -1;
}
return 0;
}
/**
- * default config_link() implementation for input video links to simplify
- * the implementation of one input one output video filters */
-int avfilter_default_config_input_link(AVFilterLink *link)
+ * A helper for query_formats() which sets all links to the same list of
+ * formats. If there are no links hooked to this filter, the list of formats is
+ * freed.
+ *
+ * FIXME: this will need changed for filters with a mix of pad types
+ * (video + audio, etc)
+ */
+void avfilter_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
{
- if(!link->dst->output_count)
- return 0;
- return avfilter_config_link(link->dst->outputs[0]);
+ int count = 0, i;
+
+ for (i = 0; i < ctx->input_count; i++) {
+ if (ctx->inputs[i]) {
+ avfilter_formats_ref(formats, &ctx->inputs[i]->out_formats);
+ count++;
+ }
+ }
+ for (i = 0; i < ctx->output_count; i++) {
+ if (ctx->outputs[i]) {
+ avfilter_formats_ref(formats, &ctx->outputs[i]->in_formats);
+ count++;
+ }
+ }
+
+ if (!count) {
+ av_free(formats->formats);
+ av_free(formats->refs);
+ av_free(formats);
+ }
}
-/**
- * default query_formats() implementation for output video links to simplify
- * the implementation of one input one output video filters */
-int *avfilter_default_query_output_formats(AVFilterLink *link)
+int avfilter_default_query_formats(AVFilterContext *ctx)
{
- if(link->src->input_count && link->src->inputs[0])
- return avfilter_make_format_list(1, link->src->inputs[0]->format);
- else
- /* XXX: any non-simple filter which would cause this branch to be taken
- * really should implement its own query_formats() for this link */
- return avfilter_make_format_list(0);
+ enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type :
+ ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
+ AVMEDIA_TYPE_VIDEO;
+
+ avfilter_set_common_formats(ctx, avfilter_all_formats(type));
+ 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);
}
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