h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / vf_hwdownload.c
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1/*
2 * This file is part of Libav.
3 *
4 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
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19#include "libavutil/buffer.h"
20#include "libavutil/hwcontext.h"
21#include "libavutil/log.h"
22#include "libavutil/mem.h"
23#include "libavutil/opt.h"
24#include "libavutil/pixdesc.h"
25
26#include "avfilter.h"
27#include "formats.h"
28#include "internal.h"
29#include "video.h"
30
31typedef struct HWDownloadContext {
32 const AVClass *class;
33
34 AVBufferRef *hwframes_ref;
35 AVHWFramesContext *hwframes;
36} HWDownloadContext;
37
38static int hwdownload_query_formats(AVFilterContext *avctx)
39{
40 AVFilterFormats *infmts = NULL;
41 AVFilterFormats *outfmts = NULL;
42 const AVPixFmtDescriptor *desc;
43 int err;
44
45 for (desc = av_pix_fmt_desc_next(NULL); desc;
46 desc = av_pix_fmt_desc_next(desc)) {
47 if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
48 err = ff_add_format(&infmts, av_pix_fmt_desc_get_id(desc));
49 else
50 err = ff_add_format(&outfmts, av_pix_fmt_desc_get_id(desc));
51 if (err) {
52 ff_formats_unref(&infmts);
53 ff_formats_unref(&outfmts);
54 return err;
55 }
56 }
57
58 ff_formats_ref(infmts, &avctx->inputs[0]->out_formats);
59 ff_formats_ref(outfmts, &avctx->outputs[0]->in_formats);
60 return 0;
61}
62
63static int hwdownload_config_input(AVFilterLink *inlink)
64{
65 AVFilterContext *avctx = inlink->dst;
66 HWDownloadContext *ctx = avctx->priv;
67
68 av_buffer_unref(&ctx->hwframes_ref);
69
70 if (!inlink->hw_frames_ctx) {
71 av_log(ctx, AV_LOG_ERROR, "The input must have a hardware frame "
72 "reference.\n");
73 return AVERROR(EINVAL);
74 }
75
76 ctx->hwframes_ref = av_buffer_ref(inlink->hw_frames_ctx);
77 if (!ctx->hwframes_ref)
78 return AVERROR(ENOMEM);
79
80 ctx->hwframes = (AVHWFramesContext*)ctx->hwframes_ref->data;
81
82 return 0;
83}
84
85static int hwdownload_config_output(AVFilterLink *outlink)
86{
87 AVFilterContext *avctx = outlink->src;
88 AVFilterLink *inlink = avctx->inputs[0];
89 HWDownloadContext *ctx = avctx->priv;
90 enum AVPixelFormat *formats;
91 int err, i, found;
92
93 if (!ctx->hwframes_ref)
94 return AVERROR(EINVAL);
95
96 err = av_hwframe_transfer_get_formats(ctx->hwframes_ref,
97 AV_HWFRAME_TRANSFER_DIRECTION_FROM,
98 &formats, 0);
99 if (err < 0)
100 return err;
101
102 found = 0;
103 for (i = 0; formats[i] != AV_PIX_FMT_NONE; i++) {
104 if (formats[i] == outlink->format) {
105 found = 1;
106 break;
107 }
108 }
109 av_freep(&formats);
110
111 if (!found) {
112 av_log(ctx, AV_LOG_ERROR, "Invalid output format %s for hwframe "
113 "download.\n", av_get_pix_fmt_name(outlink->format));
114 return AVERROR(EINVAL);
115 }
116
117 outlink->w = inlink->w;
118 outlink->h = inlink->h;
119
120 return 0;
121}
122
123static int hwdownload_filter_frame(AVFilterLink *link, AVFrame *input)
124{
125 AVFilterContext *avctx = link->dst;
126 AVFilterLink *outlink = avctx->outputs[0];
127 HWDownloadContext *ctx = avctx->priv;
128 AVFrame *output = NULL;
129 int err;
130
131 if (!ctx->hwframes_ref || !input->hw_frames_ctx) {
132 av_log(ctx, AV_LOG_ERROR, "Input frames must have hardware context.\n");
133 err = AVERROR(EINVAL);
134 goto fail;
135 }
136 if ((void*)ctx->hwframes != input->hw_frames_ctx->data) {
137 av_log(ctx, AV_LOG_ERROR, "Input frame is not the in the configured "
138 "hwframe context.\n");
139 err = AVERROR(EINVAL);
140 goto fail;
141 }
142
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143 output = ff_get_video_buffer(outlink, ctx->hwframes->width,
144 ctx->hwframes->height);
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145 if (!output) {
146 err = AVERROR(ENOMEM);
147 goto fail;
148 }
149
150 err = av_hwframe_transfer_data(output, input, 0);
151 if (err < 0) {
152 av_log(ctx, AV_LOG_ERROR, "Failed to download frame: %d.\n", err);
153 goto fail;
154 }
155
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156 output->width = outlink->w;
157 output->height = outlink->h;
158
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159 err = av_frame_copy_props(output, input);
160 if (err < 0)
161 goto fail;
162
163 av_frame_free(&input);
164
165 return ff_filter_frame(avctx->outputs[0], output);
166
167fail:
168 av_frame_free(&input);
169 av_frame_free(&output);
170 return err;
171}
172
173static av_cold void hwdownload_uninit(AVFilterContext *avctx)
174{
175 HWDownloadContext *ctx = avctx->priv;
176
177 av_buffer_unref(&ctx->hwframes_ref);
178}
179
180static const AVClass hwdownload_class = {
181 .class_name = "hwdownload",
182 .item_name = av_default_item_name,
183 .option = NULL,
184 .version = LIBAVUTIL_VERSION_INT,
185};
186
187static const AVFilterPad hwdownload_inputs[] = {
188 {
189 .name = "default",
190 .type = AVMEDIA_TYPE_VIDEO,
191 .config_props = hwdownload_config_input,
192 .filter_frame = hwdownload_filter_frame,
193 },
194 { NULL }
195};
196
197static const AVFilterPad hwdownload_outputs[] = {
198 {
199 .name = "default",
200 .type = AVMEDIA_TYPE_VIDEO,
201 .config_props = hwdownload_config_output,
202 },
203 { NULL }
204};
205
206AVFilter ff_vf_hwdownload = {
207 .name = "hwdownload",
208 .description = NULL_IF_CONFIG_SMALL("Download a hardware frame to a normal frame"),
209 .uninit = hwdownload_uninit,
210 .query_formats = hwdownload_query_formats,
211 .priv_size = sizeof(HWDownloadContext),
212 .priv_class = &hwdownload_class,
213 .inputs = hwdownload_inputs,
214 .outputs = hwdownload_outputs,
e3fb74f7 215 .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
07a844f3 216};