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![Derek Buitenhuis](/assets/img/avatar_default.png)
* commit '07a844f32ebb78503981df017fa3ebfedb75fe1c': lavfi: generic hardware surface upload and download filters Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
242 lines
6.6 KiB
C
242 lines
6.6 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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/buffer.h"
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#include "libavutil/hwcontext.h"
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#include "libavutil/hwcontext_internal.h"
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#include "libavutil/log.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct HWUploadContext {
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const AVClass *class;
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AVBufferRef *hwdevice_ref;
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AVHWDeviceContext *hwdevice;
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AVBufferRef *hwframes_ref;
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AVHWFramesContext *hwframes;
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} HWUploadContext;
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static int hwupload_query_formats(AVFilterContext *avctx)
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{
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HWUploadContext *ctx = avctx->priv;
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AVHWFramesConstraints *constraints = NULL;
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const enum AVPixelFormat *input_pix_fmts, *output_pix_fmts;
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AVFilterFormats *input_formats = NULL;
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int err, i;
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if (!avctx->hw_device_ctx) {
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av_log(ctx, AV_LOG_ERROR, "A hardware device reference is required "
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"to upload frames to.\n");
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return AVERROR(EINVAL);
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}
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ctx->hwdevice_ref = av_buffer_ref(avctx->hw_device_ctx);
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if (!ctx->hwdevice_ref)
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return AVERROR(ENOMEM);
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ctx->hwdevice = (AVHWDeviceContext*)ctx->hwdevice_ref->data;
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constraints = av_hwdevice_get_hwframe_constraints(ctx->hwdevice_ref, NULL);
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if (!constraints) {
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err = AVERROR(EINVAL);
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goto fail;
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}
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input_pix_fmts = constraints->valid_sw_formats;
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output_pix_fmts = constraints->valid_hw_formats;
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input_formats = ff_make_format_list(output_pix_fmts);
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if (!input_formats) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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if (input_pix_fmts) {
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for (i = 0; input_pix_fmts[i] != AV_PIX_FMT_NONE; i++) {
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err = ff_add_format(&input_formats, input_pix_fmts[i]);
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if (err < 0) {
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ff_formats_unref(&input_formats);
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goto fail;
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}
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}
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}
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ff_formats_ref(input_formats, &avctx->inputs[0]->out_formats);
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ff_formats_ref(ff_make_format_list(output_pix_fmts),
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&avctx->outputs[0]->in_formats);
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av_hwframe_constraints_free(&constraints);
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return 0;
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fail:
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av_buffer_unref(&ctx->hwdevice_ref);
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av_hwframe_constraints_free(&constraints);
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return err;
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}
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static int hwupload_config_output(AVFilterLink *outlink)
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{
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AVFilterContext *avctx = outlink->src;
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AVFilterLink *inlink = avctx->inputs[0];
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HWUploadContext *ctx = avctx->priv;
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int err;
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av_buffer_unref(&ctx->hwframes_ref);
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if (inlink->format == outlink->format) {
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// The input is already a hardware format, so we just want to
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// pass through the input frames in their own hardware context.
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if (!inlink->hw_frames_ctx) {
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av_log(ctx, AV_LOG_ERROR, "No input hwframe context.\n");
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return AVERROR(EINVAL);
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}
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outlink->hw_frames_ctx = av_buffer_ref(inlink->hw_frames_ctx);
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if (!outlink->hw_frames_ctx)
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return AVERROR(ENOMEM);
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return 0;
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}
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ctx->hwframes_ref = av_hwframe_ctx_alloc(ctx->hwdevice_ref);
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if (!ctx->hwframes_ref)
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return AVERROR(ENOMEM);
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ctx->hwframes = (AVHWFramesContext*)ctx->hwframes_ref->data;
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av_log(ctx, AV_LOG_DEBUG, "Surface format is %s.\n",
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av_get_pix_fmt_name(inlink->format));
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ctx->hwframes->format = outlink->format;
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ctx->hwframes->sw_format = inlink->format;
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ctx->hwframes->width = inlink->w;
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ctx->hwframes->height = inlink->h;
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err = av_hwframe_ctx_init(ctx->hwframes_ref);
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if (err < 0)
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goto fail;
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outlink->hw_frames_ctx = av_buffer_ref(ctx->hwframes_ref);
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if (!outlink->hw_frames_ctx) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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return 0;
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fail:
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av_buffer_unref(&ctx->hwframes_ref);
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return err;
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}
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static int hwupload_filter_frame(AVFilterLink *link, AVFrame *input)
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{
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AVFilterContext *avctx = link->dst;
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AVFilterLink *outlink = avctx->outputs[0];
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HWUploadContext *ctx = avctx->priv;
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AVFrame *output = NULL;
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int err;
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if (input->format == outlink->format)
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return ff_filter_frame(outlink, input);
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output = av_frame_alloc();
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if (!output) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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err = av_hwframe_get_buffer(ctx->hwframes_ref, output, 0);
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if (err < 0) {
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av_log(ctx, AV_LOG_ERROR, "Failed to allocate frame to upload to.\n");
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goto fail;
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}
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output->width = input->width;
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output->height = input->height;
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err = av_hwframe_transfer_data(output, input, 0);
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if (err < 0) {
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av_log(ctx, AV_LOG_ERROR, "Failed to upload frame: %d.\n", err);
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goto fail;
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}
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err = av_frame_copy_props(output, input);
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if (err < 0)
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goto fail;
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av_frame_free(&input);
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return ff_filter_frame(outlink, output);
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fail:
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av_frame_free(&input);
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av_frame_free(&output);
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return err;
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}
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static av_cold void hwupload_uninit(AVFilterContext *avctx)
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{
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HWUploadContext *ctx = avctx->priv;
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av_buffer_unref(&ctx->hwframes_ref);
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av_buffer_unref(&ctx->hwdevice_ref);
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}
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static const AVClass hwupload_class = {
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.class_name = "hwupload",
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.item_name = av_default_item_name,
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.option = NULL,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVFilterPad hwupload_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = hwupload_filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad hwupload_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = hwupload_config_output,
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},
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{ NULL }
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};
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AVFilter ff_vf_hwupload = {
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.name = "hwupload",
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.description = NULL_IF_CONFIG_SMALL("Upload a normal frame to a hardware frame"),
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.uninit = hwupload_uninit,
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.query_formats = hwupload_query_formats,
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.priv_size = sizeof(HWUploadContext),
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.priv_class = &hwupload_class,
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.inputs = hwupload_inputs,
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.outputs = hwupload_outputs,
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};
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