From 07a844f32ebb78503981df017fa3ebfedb75fe1c Mon Sep 17 00:00:00 2001 From: Mark Thompson Date: Thu, 25 Feb 2016 00:21:40 +0000 Subject: lavfi: generic hardware surface upload and download filters Signed-off-by: Anton Khirnov --- libavfilter/vf_hwupload.c | 241 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 241 insertions(+) create mode 100644 libavfilter/vf_hwupload.c (limited to 'libavfilter/vf_hwupload.c') diff --git a/libavfilter/vf_hwupload.c b/libavfilter/vf_hwupload.c new file mode 100644 index 0000000000..c438d5aac9 --- /dev/null +++ b/libavfilter/vf_hwupload.c @@ -0,0 +1,241 @@ +/* + * 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 = av_frame_alloc(); + if (!output) { + err = AVERROR(ENOMEM); + goto fail; + } + + err = av_hwframe_get_buffer(ctx->hwframes_ref, output, 0); + if (err < 0) { + av_log(ctx, AV_LOG_ERROR, "Failed to allocate frame to upload to.\n"); + 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, +}; -- cgit v1.2.3