mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-12 02:14:56 +02:00
![Stefano Sabatini](/assets/img/avatar_default.png)
A function name should tell what the function does rather than what the function returns. This also avoids possible conflicts (e.g. between a function and a public list of all supported formats), and clarifies the code. Breaks audio API/ABI, add a backward compatibility layer for video API/ABI.
264 lines
8.9 KiB
C
264 lines
8.9 KiB
C
/*
|
|
* 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,
|
|
int nb_samples)
|
|
{
|
|
AVFilterBufferRef *samplesref = NULL;
|
|
int linesize[8];
|
|
uint8_t *data[8];
|
|
int nb_channels = av_get_channel_layout_nb_channels(link->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, link->format,
|
|
link->planar, 16) < 0)
|
|
return NULL;
|
|
|
|
samplesref =
|
|
avfilter_get_audio_buffer_ref_from_arrays(data, linesize, perms,
|
|
nb_samples, link->format,
|
|
link->channel_layout, link->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->audio->nb_samples);
|
|
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;
|
|
}
|
|
|
|
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 **)((uint8_t *)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 **)((uint8_t *)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));
|
|
}
|
|
|
|
void avfilter_set_common_packing_formats(AVFilterContext *ctx, AVFilterFormats *formats)
|
|
{
|
|
set_common_formats(ctx, formats, AVMEDIA_TYPE_AUDIO,
|
|
offsetof(AVFilterLink, in_packing),
|
|
offsetof(AVFilterLink, out_packing));
|
|
}
|
|
|
|
int avfilter_default_query_formats(AVFilterContext *ctx)
|
|
{
|
|
avfilter_set_common_pixel_formats(ctx, avfilter_make_all_formats(AVMEDIA_TYPE_VIDEO));
|
|
avfilter_set_common_sample_formats(ctx, avfilter_make_all_formats(AVMEDIA_TYPE_AUDIO));
|
|
avfilter_set_common_channel_layouts(ctx, avfilter_make_all_channel_layouts());
|
|
avfilter_set_common_packing_formats(ctx, avfilter_make_all_packing_formats());
|
|
|
|
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,
|
|
int nb_samples)
|
|
{
|
|
return avfilter_get_audio_buffer(link->dst->outputs[0], perms, nb_samples);
|
|
}
|
|
|