FFmpeg/libavfilter/vf_hwupload.c
Mark Thompson e3fb74f7f9 lavfi: Always propagate hw_frames_ctx through links
Also adds a new flag to mark filters which are aware of hwframes and
will perform this task themselves, and marks all appropriate filters
with this flag.

This is required to allow software-mapped hardware frames to work,
because we need to have the frames context available for any later
mapping operation in the filter graph.

The output from the filter graph should only propagate further to an
encoder if the hardware format actually matches the visible format
(mapped frames are valid here and have an hw_frames_ctx, but this
should not be given to the encoder as its hardware context).
2016-11-02 20:29:05 +00:00

238 lines
6.6 KiB
C

/*
* This file is part of Libav.
*
* 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.
*
* 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/buffer.h"
#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_internal.h"
#include "libavutil/log.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct HWUploadContext {
const AVClass *class;
AVBufferRef *hwdevice_ref;
AVHWDeviceContext *hwdevice;
AVBufferRef *hwframes_ref;
AVHWFramesContext *hwframes;
} HWUploadContext;
static int hwupload_query_formats(AVFilterContext *avctx)
{
HWUploadContext *ctx = avctx->priv;
AVHWFramesConstraints *constraints = NULL;
const enum AVPixelFormat *input_pix_fmts, *output_pix_fmts;
AVFilterFormats *input_formats = NULL;
int err, i;
if (!avctx->hw_device_ctx) {
av_log(ctx, AV_LOG_ERROR, "A hardware device reference is required "
"to upload frames to.\n");
return AVERROR(EINVAL);
}
ctx->hwdevice_ref = av_buffer_ref(avctx->hw_device_ctx);
if (!ctx->hwdevice_ref)
return AVERROR(ENOMEM);
ctx->hwdevice = (AVHWDeviceContext*)ctx->hwdevice_ref->data;
constraints = av_hwdevice_get_hwframe_constraints(ctx->hwdevice_ref, NULL);
if (!constraints) {
err = AVERROR(EINVAL);
goto fail;
}
input_pix_fmts = constraints->valid_sw_formats;
output_pix_fmts = constraints->valid_hw_formats;
input_formats = ff_make_format_list(output_pix_fmts);
if (!input_formats) {
err = AVERROR(ENOMEM);
goto fail;
}
if (input_pix_fmts) {
for (i = 0; input_pix_fmts[i] != AV_PIX_FMT_NONE; i++) {
err = ff_add_format(&input_formats, input_pix_fmts[i]);
if (err < 0) {
ff_formats_unref(&input_formats);
goto fail;
}
}
}
ff_formats_ref(input_formats, &avctx->inputs[0]->out_formats);
ff_formats_ref(ff_make_format_list(output_pix_fmts),
&avctx->outputs[0]->in_formats);
av_hwframe_constraints_free(&constraints);
return 0;
fail:
av_buffer_unref(&ctx->hwdevice_ref);
av_hwframe_constraints_free(&constraints);
return err;
}
static int hwupload_config_output(AVFilterLink *outlink)
{
AVFilterContext *avctx = outlink->src;
AVFilterLink *inlink = avctx->inputs[0];
HWUploadContext *ctx = avctx->priv;
int err;
av_buffer_unref(&ctx->hwframes_ref);
if (inlink->format == outlink->format) {
// The input is already a hardware format, so we just want to
// pass through the input frames in their own hardware context.
if (!inlink->hw_frames_ctx) {
av_log(ctx, AV_LOG_ERROR, "No input hwframe context.\n");
return AVERROR(EINVAL);
}
outlink->hw_frames_ctx = av_buffer_ref(inlink->hw_frames_ctx);
if (!outlink->hw_frames_ctx)
return AVERROR(ENOMEM);
return 0;
}
ctx->hwframes_ref = av_hwframe_ctx_alloc(ctx->hwdevice_ref);
if (!ctx->hwframes_ref)
return AVERROR(ENOMEM);
ctx->hwframes = (AVHWFramesContext*)ctx->hwframes_ref->data;
av_log(ctx, AV_LOG_DEBUG, "Surface format is %s.\n",
av_get_pix_fmt_name(inlink->format));
ctx->hwframes->format = outlink->format;
ctx->hwframes->sw_format = inlink->format;
ctx->hwframes->width = inlink->w;
ctx->hwframes->height = inlink->h;
err = av_hwframe_ctx_init(ctx->hwframes_ref);
if (err < 0)
goto fail;
outlink->hw_frames_ctx = av_buffer_ref(ctx->hwframes_ref);
if (!outlink->hw_frames_ctx) {
err = AVERROR(ENOMEM);
goto fail;
}
return 0;
fail:
av_buffer_unref(&ctx->hwframes_ref);
return err;
}
static int hwupload_filter_frame(AVFilterLink *link, AVFrame *input)
{
AVFilterContext *avctx = link->dst;
AVFilterLink *outlink = avctx->outputs[0];
HWUploadContext *ctx = avctx->priv;
AVFrame *output = NULL;
int err;
if (input->format == outlink->format)
return ff_filter_frame(outlink, input);
output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!output) {
av_log(ctx, AV_LOG_ERROR, "Failed to allocate frame to upload to.\n");
err = AVERROR(ENOMEM);
goto fail;
}
output->width = input->width;
output->height = input->height;
err = av_hwframe_transfer_data(output, input, 0);
if (err < 0) {
av_log(ctx, AV_LOG_ERROR, "Failed to upload frame: %d.\n", err);
goto fail;
}
err = av_frame_copy_props(output, input);
if (err < 0)
goto fail;
av_frame_free(&input);
return ff_filter_frame(outlink, output);
fail:
av_frame_free(&input);
av_frame_free(&output);
return err;
}
static av_cold void hwupload_uninit(AVFilterContext *avctx)
{
HWUploadContext *ctx = avctx->priv;
av_buffer_unref(&ctx->hwframes_ref);
av_buffer_unref(&ctx->hwdevice_ref);
}
static const AVClass hwupload_class = {
.class_name = "hwupload",
.item_name = av_default_item_name,
.option = NULL,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVFilterPad hwupload_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = hwupload_filter_frame,
},
{ NULL }
};
static const AVFilterPad hwupload_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = hwupload_config_output,
},
{ NULL }
};
AVFilter ff_vf_hwupload = {
.name = "hwupload",
.description = NULL_IF_CONFIG_SMALL("Upload a normal frame to a hardware frame"),
.uninit = hwupload_uninit,
.query_formats = hwupload_query_formats,
.priv_size = sizeof(HWUploadContext),
.priv_class = &hwupload_class,
.inputs = hwupload_inputs,
.outputs = hwupload_outputs,
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
};