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/* |
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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/log.h" |
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#include "libavutil/mem.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.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 HWDownloadContext { |
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const AVClass *class; |
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AVBufferRef *hwframes_ref; |
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AVHWFramesContext *hwframes; |
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} HWDownloadContext; |
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static int hwdownload_query_formats(AVFilterContext *avctx) |
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{ |
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int err; |
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if ((err = ff_formats_ref(ff_formats_pixdesc_filter(AV_PIX_FMT_FLAG_HWACCEL, 0), |
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&avctx->inputs[0]->outcfg.formats)) || |
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(err = ff_formats_ref(ff_formats_pixdesc_filter(0, AV_PIX_FMT_FLAG_HWACCEL), |
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&avctx->outputs[0]->incfg.formats))) |
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return err; |
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return 0; |
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} |
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static int hwdownload_config_input(AVFilterLink *inlink) |
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{ |
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AVFilterContext *avctx = inlink->dst; |
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HWDownloadContext *ctx = avctx->priv; |
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av_buffer_unref(&ctx->hwframes_ref); |
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if (!inlink->hw_frames_ctx) { |
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av_log(ctx, AV_LOG_ERROR, "The input must have a hardware frame " |
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"reference.\n"); |
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return AVERROR(EINVAL); |
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} |
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ctx->hwframes_ref = av_buffer_ref(inlink->hw_frames_ctx); |
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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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return 0; |
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} |
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static int hwdownload_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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HWDownloadContext *ctx = avctx->priv; |
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enum AVPixelFormat *formats; |
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int err, i, found; |
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if (!ctx->hwframes_ref) |
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return AVERROR(EINVAL); |
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err = av_hwframe_transfer_get_formats(ctx->hwframes_ref, |
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AV_HWFRAME_TRANSFER_DIRECTION_FROM, |
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&formats, 0); |
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if (err < 0) |
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return err; |
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found = 0; |
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for (i = 0; formats[i] != AV_PIX_FMT_NONE; i++) { |
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if (formats[i] == outlink->format) { |
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found = 1; |
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break; |
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} |
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} |
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av_freep(&formats); |
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if (!found) { |
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av_log(ctx, AV_LOG_ERROR, "Invalid output format %s for hwframe " |
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"download.\n", av_get_pix_fmt_name(outlink->format)); |
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return AVERROR(EINVAL); |
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} |
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outlink->w = inlink->w; |
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outlink->h = inlink->h; |
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return 0; |
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} |
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static int hwdownload_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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HWDownloadContext *ctx = avctx->priv; |
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AVFrame *output = NULL; |
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int err; |
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if (!ctx->hwframes_ref || !input->hw_frames_ctx) { |
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av_log(ctx, AV_LOG_ERROR, "Input frames must have hardware context.\n"); |
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err = AVERROR(EINVAL); |
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goto fail; |
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} |
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if ((void*)ctx->hwframes != input->hw_frames_ctx->data) { |
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av_log(ctx, AV_LOG_ERROR, "Input frame is not the in the configured " |
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"hwframe context.\n"); |
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err = AVERROR(EINVAL); |
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goto fail; |
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} |
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output = ff_get_video_buffer(outlink, ctx->hwframes->width, |
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ctx->hwframes->height); |
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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_transfer_data(output, input, 0); |
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if (err < 0) { |
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av_log(ctx, AV_LOG_ERROR, "Failed to download frame: %d.\n", err); |
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goto fail; |
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} |
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output->width = outlink->w; |
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output->height = outlink->h; |
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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(avctx->outputs[0], 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 hwdownload_uninit(AVFilterContext *avctx) |
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{ |
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HWDownloadContext *ctx = avctx->priv; |
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av_buffer_unref(&ctx->hwframes_ref); |
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} |
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static const AVClass hwdownload_class = { |
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.class_name = "hwdownload", |
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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 hwdownload_inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = hwdownload_config_input, |
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.filter_frame = hwdownload_filter_frame, |
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}, |
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}; |
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static const AVFilterPad hwdownload_outputs[] = { |
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{ |
186 |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = hwdownload_config_output, |
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}, |
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}; |
191 |
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const AVFilter ff_vf_hwdownload = { |
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.name = "hwdownload", |
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.description = NULL_IF_CONFIG_SMALL("Download a hardware frame to a normal frame"), |
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.uninit = hwdownload_uninit, |
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.priv_size = sizeof(HWDownloadContext), |
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.priv_class = &hwdownload_class, |
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FILTER_INPUTS(hwdownload_inputs), |
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FILTER_OUTPUTS(hwdownload_outputs), |
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FILTER_QUERY_FUNC(hwdownload_query_formats), |
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.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE, |
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}; |
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