2 * Copyright (c) 2013 Vittorio Giovara
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * Generate a frame packed video, by combining two views in a single surface.
28 #include "libavutil/common.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/pixdesc.h"
32 #include "libavutil/rational.h"
33 #include "libavutil/stereo3d.h"
43 typedef struct FramepackContext {
46 const AVPixFmtDescriptor *pix_desc; ///< agreed pixel format
48 enum AVStereo3DType format; ///< frame pack type output
50 AVFrame *input_views[2]; ///< input frames
52 int64_t double_pts; ///< new pts for frameseq mode
55 static const enum AVPixelFormat formats_supported[] = {
56 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
57 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVJ420P,
58 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
62 static int query_formats(AVFilterContext *ctx)
64 // this will ensure that formats are the same on all pads
65 ff_set_common_formats(ctx, ff_make_format_list(formats_supported));
69 static av_cold void framepack_uninit(AVFilterContext *ctx)
71 FramepackContext *s = ctx->priv;
73 // clean any leftover frame
74 av_frame_free(&s->input_views[LEFT]);
75 av_frame_free(&s->input_views[RIGHT]);
78 static int config_output(AVFilterLink *outlink)
80 AVFilterContext *ctx = outlink->src;
81 FramepackContext *s = outlink->src->priv;
83 int width = ctx->inputs[LEFT]->w;
84 int height = ctx->inputs[LEFT]->h;
85 AVRational time_base = ctx->inputs[LEFT]->time_base;
86 AVRational frame_rate = ctx->inputs[LEFT]->frame_rate;
88 // check size and fps match on the other input
89 if (width != ctx->inputs[RIGHT]->w ||
90 height != ctx->inputs[RIGHT]->h) {
91 av_log(ctx, AV_LOG_ERROR,
92 "Left and right sizes differ (%dx%d vs %dx%d).\n",
94 ctx->inputs[RIGHT]->w, ctx->inputs[RIGHT]->h);
95 return AVERROR_INVALIDDATA;
96 } else if (av_cmp_q(time_base, ctx->inputs[RIGHT]->time_base) != 0) {
97 av_log(ctx, AV_LOG_ERROR,
98 "Left and right time bases differ (%d/%d vs %d/%d).\n",
99 time_base.num, time_base.den,
100 ctx->inputs[RIGHT]->time_base.num,
101 ctx->inputs[RIGHT]->time_base.den);
102 return AVERROR_INVALIDDATA;
103 } else if (av_cmp_q(frame_rate, ctx->inputs[RIGHT]->frame_rate) != 0) {
104 av_log(ctx, AV_LOG_ERROR,
105 "Left and right framerates differ (%d/%d vs %d/%d).\n",
106 frame_rate.num, frame_rate.den,
107 ctx->inputs[RIGHT]->frame_rate.num,
108 ctx->inputs[RIGHT]->frame_rate.den);
109 return AVERROR_INVALIDDATA;
112 s->pix_desc = av_pix_fmt_desc_get(outlink->format);
116 // modify output properties as needed
118 case AV_STEREO3D_FRAMESEQUENCE:
122 s->double_pts = AV_NOPTS_VALUE;
124 case AV_STEREO3D_COLUMNS:
125 case AV_STEREO3D_SIDEBYSIDE:
128 case AV_STEREO3D_LINES:
129 case AV_STEREO3D_TOPBOTTOM:
133 av_log(ctx, AV_LOG_ERROR, "Unknown packing mode.");
134 return AVERROR_INVALIDDATA;
139 outlink->time_base = time_base;
140 outlink->frame_rate = frame_rate;
145 static void horizontal_frame_pack(AVFilterLink *outlink,
149 AVFilterContext *ctx = outlink->src;
150 FramepackContext *s = ctx->priv;
154 const uint8_t *leftp = s->input_views[LEFT]->data[0];
155 const uint8_t *rightp = s->input_views[RIGHT]->data[0];
156 uint8_t *dstp = out->data[0];
157 int length = out->width / 2;
158 int lines = out->height;
160 for (plane = 0; plane < s->pix_desc->nb_components; plane++) {
161 if (plane == 1 || plane == 2) {
162 length = AV_CEIL_RSHIFT(out->width / 2, s->pix_desc->log2_chroma_w);
163 lines = AV_CEIL_RSHIFT(out->height, s->pix_desc->log2_chroma_h);
165 for (i = 0; i < lines; i++) {
167 leftp = s->input_views[LEFT]->data[plane] +
168 s->input_views[LEFT]->linesize[plane] * i;
169 rightp = s->input_views[RIGHT]->data[plane] +
170 s->input_views[RIGHT]->linesize[plane] * i;
171 dstp = out->data[plane] + out->linesize[plane] * i;
172 for (j = 0; j < length; j++) {
173 // interpolate chroma as necessary
174 if ((s->pix_desc->log2_chroma_w ||
175 s->pix_desc->log2_chroma_h) &&
176 (plane == 1 || plane == 2)) {
177 *dstp++ = (*leftp + *rightp) / 2;
178 *dstp++ = (*leftp + *rightp) / 2;
189 for (i = 0; i < 2; i++) {
190 const uint8_t *src[4];
192 int sub_w = s->input_views[i]->width >> s->pix_desc->log2_chroma_w;
194 src[0] = s->input_views[i]->data[0];
195 src[1] = s->input_views[i]->data[1];
196 src[2] = s->input_views[i]->data[2];
198 dst[0] = out->data[0] + i * s->input_views[i]->width;
199 dst[1] = out->data[1] + i * sub_w;
200 dst[2] = out->data[2] + i * sub_w;
202 av_image_copy(dst, out->linesize, src, s->input_views[i]->linesize,
203 s->input_views[i]->format,
204 s->input_views[i]->width,
205 s->input_views[i]->height);
210 static void vertical_frame_pack(AVFilterLink *outlink,
214 AVFilterContext *ctx = outlink->src;
215 FramepackContext *s = ctx->priv;
218 for (i = 0; i < 2; i++) {
219 const uint8_t *src[4];
222 int sub_h = s->input_views[i]->height >> s->pix_desc->log2_chroma_h;
224 src[0] = s->input_views[i]->data[0];
225 src[1] = s->input_views[i]->data[1];
226 src[2] = s->input_views[i]->data[2];
228 dst[0] = out->data[0] + i * out->linesize[0] *
229 (interleaved + s->input_views[i]->height * (1 - interleaved));
230 dst[1] = out->data[1] + i * out->linesize[1] *
231 (interleaved + sub_h * (1 - interleaved));
232 dst[2] = out->data[2] + i * out->linesize[2] *
233 (interleaved + sub_h * (1 - interleaved));
235 linesizes[0] = out->linesize[0] +
236 interleaved * out->linesize[0];
237 linesizes[1] = out->linesize[1] +
238 interleaved * out->linesize[1];
239 linesizes[2] = out->linesize[2] +
240 interleaved * out->linesize[2];
242 av_image_copy(dst, linesizes, src, s->input_views[i]->linesize,
243 s->input_views[i]->format,
244 s->input_views[i]->width,
245 s->input_views[i]->height);
249 static av_always_inline void spatial_frame_pack(AVFilterLink *outlink,
252 AVFilterContext *ctx = outlink->src;
253 FramepackContext *s = ctx->priv;
255 case AV_STEREO3D_SIDEBYSIDE:
256 horizontal_frame_pack(outlink, dst, 0);
258 case AV_STEREO3D_COLUMNS:
259 horizontal_frame_pack(outlink, dst, 1);
261 case AV_STEREO3D_TOPBOTTOM:
262 vertical_frame_pack(outlink, dst, 0);
264 case AV_STEREO3D_LINES:
265 vertical_frame_pack(outlink, dst, 1);
270 static int filter_frame_left(AVFilterLink *inlink, AVFrame *frame)
272 FramepackContext *s = inlink->dst->priv;
273 s->input_views[LEFT] = frame;
277 static int filter_frame_right(AVFilterLink *inlink, AVFrame *frame)
279 FramepackContext *s = inlink->dst->priv;
280 s->input_views[RIGHT] = frame;
284 static int request_frame(AVFilterLink *outlink)
286 AVFilterContext *ctx = outlink->src;
287 FramepackContext *s = ctx->priv;
291 /* get a frame on the either input, stop as soon as a video ends */
292 for (i = 0; i < 2; i++) {
293 if (!s->input_views[i]) {
294 ret = ff_request_frame(ctx->inputs[i]);
300 if (s->format == AV_STEREO3D_FRAMESEQUENCE) {
301 if (s->double_pts == AV_NOPTS_VALUE)
302 s->double_pts = s->input_views[LEFT]->pts;
304 for (i = 0; i < 2; i++) {
305 // set correct timestamps
306 s->input_views[i]->pts = s->double_pts++;
308 // set stereo3d side data
309 stereo = av_stereo3d_create_side_data(s->input_views[i]);
311 return AVERROR(ENOMEM);
312 stereo->type = s->format;
314 // filter the frame and immediately relinquish its pointer
315 ret = ff_filter_frame(outlink, s->input_views[i]);
316 s->input_views[i] = NULL;
322 AVFrame *dst = ff_get_video_buffer(outlink, outlink->w, outlink->h);
324 return AVERROR(ENOMEM);
326 spatial_frame_pack(outlink, dst);
328 // get any property from the original frame
329 ret = av_frame_copy_props(dst, s->input_views[LEFT]);
335 for (i = 0; i < 2; i++)
336 av_frame_free(&s->input_views[i]);
338 // set stereo3d side data
339 stereo = av_stereo3d_create_side_data(dst);
342 return AVERROR(ENOMEM);
344 stereo->type = s->format;
346 return ff_filter_frame(outlink, dst);
350 #define OFFSET(x) offsetof(FramepackContext, x)
351 #define V AV_OPT_FLAG_VIDEO_PARAM
352 static const AVOption options[] = {
353 { "format", "Frame pack output format", OFFSET(format), AV_OPT_TYPE_INT,
354 { .i64 = AV_STEREO3D_SIDEBYSIDE }, 0, INT_MAX, .flags = V, .unit = "format" },
355 { "sbs", "Views are packed next to each other", 0, AV_OPT_TYPE_CONST,
356 { .i64 = AV_STEREO3D_SIDEBYSIDE }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
357 { "tab", "Views are packed on top of each other", 0, AV_OPT_TYPE_CONST,
358 { .i64 = AV_STEREO3D_TOPBOTTOM }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
359 { "frameseq", "Views are one after the other", 0, AV_OPT_TYPE_CONST,
360 { .i64 = AV_STEREO3D_FRAMESEQUENCE }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
361 { "lines", "Views are interleaved by lines", 0, AV_OPT_TYPE_CONST,
362 { .i64 = AV_STEREO3D_LINES }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
363 { "columns", "Views are interleaved by columns", 0, AV_OPT_TYPE_CONST,
364 { .i64 = AV_STEREO3D_COLUMNS }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
368 static const AVClass framepack_class = {
369 .class_name = "framepack",
370 .item_name = av_default_item_name,
372 .version = LIBAVUTIL_VERSION_INT,
375 static const AVFilterPad framepack_inputs[] = {
378 .type = AVMEDIA_TYPE_VIDEO,
379 .filter_frame = filter_frame_left,
384 .type = AVMEDIA_TYPE_VIDEO,
385 .filter_frame = filter_frame_right,
391 static const AVFilterPad framepack_outputs[] = {
394 .type = AVMEDIA_TYPE_VIDEO,
395 .config_props = config_output,
396 .request_frame = request_frame,
401 AVFilter ff_vf_framepack = {
403 .description = NULL_IF_CONFIG_SMALL("Generate a frame packed stereoscopic video."),
404 .priv_size = sizeof(FramepackContext),
405 .priv_class = &framepack_class,
406 .query_formats = query_formats,
407 .inputs = framepack_inputs,
408 .outputs = framepack_outputs,
409 .uninit = framepack_uninit,