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path: root/libavfilter/vf_hwupload.c (plain)
blob: 157686b7b3b81f9b14988b9f83e0158be9b62f95
1/*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#include "libavutil/buffer.h"
20#include "libavutil/hwcontext.h"
21#include "libavutil/hwcontext_internal.h"
22#include "libavutil/log.h"
23#include "libavutil/pixdesc.h"
24#include "libavutil/opt.h"
25
26#include "avfilter.h"
27#include "formats.h"
28#include "internal.h"
29#include "video.h"
30
31typedef struct HWUploadContext {
32 const AVClass *class;
33
34 AVBufferRef *hwdevice_ref;
35 AVHWDeviceContext *hwdevice;
36
37 AVBufferRef *hwframes_ref;
38 AVHWFramesContext *hwframes;
39} HWUploadContext;
40
41static int hwupload_query_formats(AVFilterContext *avctx)
42{
43 HWUploadContext *ctx = avctx->priv;
44 AVHWFramesConstraints *constraints = NULL;
45 const enum AVPixelFormat *input_pix_fmts, *output_pix_fmts;
46 AVFilterFormats *input_formats = NULL;
47 int err, i;
48
49 if (!avctx->hw_device_ctx) {
50 av_log(ctx, AV_LOG_ERROR, "A hardware device reference is required "
51 "to upload frames to.\n");
52 return AVERROR(EINVAL);
53 }
54
55 ctx->hwdevice_ref = av_buffer_ref(avctx->hw_device_ctx);
56 if (!ctx->hwdevice_ref)
57 return AVERROR(ENOMEM);
58 ctx->hwdevice = (AVHWDeviceContext*)ctx->hwdevice_ref->data;
59
60 constraints = av_hwdevice_get_hwframe_constraints(ctx->hwdevice_ref, NULL);
61 if (!constraints) {
62 err = AVERROR(EINVAL);
63 goto fail;
64 }
65
66 input_pix_fmts = constraints->valid_sw_formats;
67 output_pix_fmts = constraints->valid_hw_formats;
68
69 input_formats = ff_make_format_list(output_pix_fmts);
70 if (!input_formats) {
71 err = AVERROR(ENOMEM);
72 goto fail;
73 }
74 if (input_pix_fmts) {
75 for (i = 0; input_pix_fmts[i] != AV_PIX_FMT_NONE; i++) {
76 err = ff_add_format(&input_formats, input_pix_fmts[i]);
77 if (err < 0)
78 goto fail;
79 }
80 }
81
82 if ((err = ff_formats_ref(input_formats, &avctx->inputs[0]->out_formats)) < 0 ||
83 (err = ff_formats_ref(ff_make_format_list(output_pix_fmts),
84 &avctx->outputs[0]->in_formats)) < 0)
85 goto fail;
86
87 av_hwframe_constraints_free(&constraints);
88 return 0;
89
90fail:
91 av_buffer_unref(&ctx->hwdevice_ref);
92 av_hwframe_constraints_free(&constraints);
93 return err;
94}
95
96static int hwupload_config_output(AVFilterLink *outlink)
97{
98 AVFilterContext *avctx = outlink->src;
99 AVFilterLink *inlink = avctx->inputs[0];
100 HWUploadContext *ctx = avctx->priv;
101 int err;
102
103 av_buffer_unref(&ctx->hwframes_ref);
104
105 if (inlink->format == outlink->format) {
106 // The input is already a hardware format, so we just want to
107 // pass through the input frames in their own hardware context.
108 if (!inlink->hw_frames_ctx) {
109 av_log(ctx, AV_LOG_ERROR, "No input hwframe context.\n");
110 return AVERROR(EINVAL);
111 }
112
113 outlink->hw_frames_ctx = av_buffer_ref(inlink->hw_frames_ctx);
114 if (!outlink->hw_frames_ctx)
115 return AVERROR(ENOMEM);
116
117 return 0;
118 }
119
120 ctx->hwframes_ref = av_hwframe_ctx_alloc(ctx->hwdevice_ref);
121 if (!ctx->hwframes_ref)
122 return AVERROR(ENOMEM);
123
124 ctx->hwframes = (AVHWFramesContext*)ctx->hwframes_ref->data;
125
126 av_log(ctx, AV_LOG_DEBUG, "Surface format is %s.\n",
127 av_get_pix_fmt_name(inlink->format));
128
129 ctx->hwframes->format = outlink->format;
130 ctx->hwframes->sw_format = inlink->format;
131 ctx->hwframes->width = inlink->w;
132 ctx->hwframes->height = inlink->h;
133
134 err = av_hwframe_ctx_init(ctx->hwframes_ref);
135 if (err < 0)
136 goto fail;
137
138 outlink->hw_frames_ctx = av_buffer_ref(ctx->hwframes_ref);
139 if (!outlink->hw_frames_ctx) {
140 err = AVERROR(ENOMEM);
141 goto fail;
142 }
143
144 return 0;
145
146fail:
147 av_buffer_unref(&ctx->hwframes_ref);
148 return err;
149}
150
151static int hwupload_filter_frame(AVFilterLink *link, AVFrame *input)
152{
153 AVFilterContext *avctx = link->dst;
154 AVFilterLink *outlink = avctx->outputs[0];
155 HWUploadContext *ctx = avctx->priv;
156 AVFrame *output = NULL;
157 int err;
158
159 if (input->format == outlink->format)
160 return ff_filter_frame(outlink, input);
161
162 output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
163 if (!output) {
164 av_log(ctx, AV_LOG_ERROR, "Failed to allocate frame to upload to.\n");
165 err = AVERROR(ENOMEM);
166 goto fail;
167 }
168
169 output->width = input->width;
170 output->height = input->height;
171
172 err = av_hwframe_transfer_data(output, input, 0);
173 if (err < 0) {
174 av_log(ctx, AV_LOG_ERROR, "Failed to upload frame: %d.\n", err);
175 goto fail;
176 }
177
178 err = av_frame_copy_props(output, input);
179 if (err < 0)
180 goto fail;
181
182 av_frame_free(&input);
183
184 return ff_filter_frame(outlink, output);
185
186fail:
187 av_frame_free(&input);
188 av_frame_free(&output);
189 return err;
190}
191
192static av_cold void hwupload_uninit(AVFilterContext *avctx)
193{
194 HWUploadContext *ctx = avctx->priv;
195
196 av_buffer_unref(&ctx->hwframes_ref);
197 av_buffer_unref(&ctx->hwdevice_ref);
198}
199
200static const AVClass hwupload_class = {
201 .class_name = "hwupload",
202 .item_name = av_default_item_name,
203 .option = NULL,
204 .version = LIBAVUTIL_VERSION_INT,
205};
206
207static const AVFilterPad hwupload_inputs[] = {
208 {
209 .name = "default",
210 .type = AVMEDIA_TYPE_VIDEO,
211 .filter_frame = hwupload_filter_frame,
212 },
213 { NULL }
214};
215
216static const AVFilterPad hwupload_outputs[] = {
217 {
218 .name = "default",
219 .type = AVMEDIA_TYPE_VIDEO,
220 .config_props = hwupload_config_output,
221 },
222 { NULL }
223};
224
225AVFilter ff_vf_hwupload = {
226 .name = "hwupload",
227 .description = NULL_IF_CONFIG_SMALL("Upload a normal frame to a hardware frame"),
228 .uninit = hwupload_uninit,
229 .query_formats = hwupload_query_formats,
230 .priv_size = sizeof(HWUploadContext),
231 .priv_class = &hwupload_class,
232 .inputs = hwupload_inputs,
233 .outputs = hwupload_outputs,
234 .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
235};
236
generated by cgit at 2024-05-17 05:03:59 (GMT)