[deb_ffmpeg.git] / ffmpeg / libavfilter / vf_zoompan.c

/*
 * Copyright (c) 2013 Paul B Mahol
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg 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.
 *
 * FFmpeg 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 FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "libswscale/swscale.h"

static const char *const var_names[] = {
    "in_w",   "iw",
    "in_h",   "ih",
    "out_w",  "ow",
    "out_h",  "oh",
    "in",
    "on",
    "duration",
    "pduration",
    "time",
    "frame",
    "zoom",
    "pzoom",
    "x", "px",
    "y", "py",
    "a",
    "sar",
    "dar",
    "hsub",
    "vsub",
    NULL
};

enum var_name {
    VAR_IN_W,   VAR_IW,
    VAR_IN_H,   VAR_IH,
    VAR_OUT_W,  VAR_OW,
    VAR_OUT_H,  VAR_OH,
    VAR_IN,
    VAR_ON,
    VAR_DURATION,
    VAR_PDURATION,
    VAR_TIME,
    VAR_FRAME,
    VAR_ZOOM,
    VAR_PZOOM,
    VAR_X, VAR_PX,
    VAR_Y, VAR_PY,
    VAR_A,
    VAR_SAR,
    VAR_DAR,
    VAR_HSUB,
    VAR_VSUB,
    VARS_NB
};

typedef struct ZPcontext {
    const AVClass *class;
    char *zoom_expr_str;
    char *x_expr_str;
    char *y_expr_str;
    char *duration_expr_str;
    int w, h;
    double x, y;
    double prev_zoom;
    int prev_nb_frames;
    struct SwsContext *sws;
    int64_t frame_count;
} ZPContext;

#define OFFSET(x) offsetof(ZPContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption zoompan_options[] = {
    { "zoom", "set the zoom expression", OFFSET(zoom_expr_str), AV_OPT_TYPE_STRING, {.str = "1" }, .flags = FLAGS },
    { "z", "set the zoom expression", OFFSET(zoom_expr_str), AV_OPT_TYPE_STRING, {.str = "1" }, .flags = FLAGS },
    { "x", "set the x expression", OFFSET(x_expr_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags = FLAGS },
    { "y", "set the y expression", OFFSET(y_expr_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags = FLAGS },
    { "d", "set the duration expression", OFFSET(duration_expr_str), AV_OPT_TYPE_STRING, {.str="90"}, .flags = FLAGS },
    { "s", "set the output image size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, .flags = FLAGS },
    { NULL }
};

AVFILTER_DEFINE_CLASS(zoompan);

static av_cold int init(AVFilterContext *ctx)
{
    ZPContext *s = ctx->priv;

    s->prev_zoom = 1;
    return 0;
}

static int config_output(AVFilterLink *outlink)
{
    AVFilterContext *ctx = outlink->src;
    ZPContext *s = ctx->priv;

    outlink->w = s->w;
    outlink->h = s->h;

    return 0;
}

static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
    AVFilterContext *ctx = inlink->dst;
    AVFilterLink *outlink = ctx->outputs[0];
    ZPContext *s = ctx->priv;
    double var_values[VARS_NB], nb_frames, zoom, dx, dy;
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(in->format);
    AVFrame *out;
    int i, k, x, y, w, h, ret = 0;

    var_values[VAR_IN_W]  = var_values[VAR_IW] = in->width;
    var_values[VAR_IN_H]  = var_values[VAR_IH] = in->height;
    var_values[VAR_OUT_W] = var_values[VAR_OW] = s->w;
    var_values[VAR_OUT_H] = var_values[VAR_OH] = s->h;
    var_values[VAR_IN]    = inlink->frame_count + 1;
    var_values[VAR_ON]    = outlink->frame_count + 1;
    var_values[VAR_PX]    = s->x;
    var_values[VAR_PY]    = s->y;
    var_values[VAR_X]     = 0;
    var_values[VAR_Y]     = 0;
    var_values[VAR_PZOOM] = s->prev_zoom;
    var_values[VAR_ZOOM]  = 1;
    var_values[VAR_PDURATION] = s->prev_nb_frames;
    var_values[VAR_A]     = (double) in->width / in->height;
    var_values[VAR_SAR]   = inlink->sample_aspect_ratio.num ?
        (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
    var_values[VAR_DAR]   = var_values[VAR_A] * var_values[VAR_SAR];
    var_values[VAR_HSUB]  = 1 << desc->log2_chroma_w;
    var_values[VAR_VSUB]  = 1 << desc->log2_chroma_h;

    if ((ret = av_expr_parse_and_eval(&nb_frames, s->duration_expr_str,
                                      var_names, var_values,
                                      NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
        goto fail;

    var_values[VAR_DURATION] = nb_frames;
    for (i = 0; i < nb_frames; i++) {
        int px[4];
        int py[4];
        uint8_t *input[4];
        int64_t pts = av_rescale_q(in->pts, inlink->time_base,
                                   outlink->time_base) + s->frame_count;

        var_values[VAR_TIME] = pts * av_q2d(outlink->time_base);
        var_values[VAR_FRAME] = i;
        var_values[VAR_ON] = outlink->frame_count + 1;
        if ((ret = av_expr_parse_and_eval(&zoom, s->zoom_expr_str,
                                          var_names, var_values,
                                          NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
            goto fail;

        zoom = av_clipd(zoom, 1, 10);
        var_values[VAR_ZOOM] = zoom;
        w = in->width * (1.0 / zoom);
        h = in->height * (1.0 / zoom);

        if ((ret = av_expr_parse_and_eval(&dx, s->x_expr_str,
                                          var_names, var_values,
                                          NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
            goto fail;
        x = dx = av_clipd(dx, 0, FFMAX(in->width - w, 0));
        var_values[VAR_X] = dx;
        x &= ~((1 << desc->log2_chroma_w) - 1);

        if ((ret = av_expr_parse_and_eval(&dy, s->y_expr_str,
                                          var_names, var_values,
                                          NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
            goto fail;
        y = dy = av_clipd(dy, 0, FFMAX(in->height - h, 0));
        var_values[VAR_Y] = dy;
        y &= ~((1 << desc->log2_chroma_h) - 1);

        out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
        if (!out) {
            ret = AVERROR(ENOMEM);
            goto fail;
        }

        px[1] = px[2] = FF_CEIL_RSHIFT(x, desc->log2_chroma_w);
        px[0] = px[3] = x;

        py[1] = py[2] = FF_CEIL_RSHIFT(y, desc->log2_chroma_h);
        py[0] = py[3] = y;

        s->sws = sws_alloc_context();
        if (!s->sws) {
            ret = AVERROR(ENOMEM);
            goto fail;
        }

        for (k = 0; in->data[k]; k++)
            input[k] = in->data[k] + py[k] * in->linesize[k] + px[k];

        av_opt_set_int(s->sws, "srcw", w, 0);
        av_opt_set_int(s->sws, "srch", h, 0);
        av_opt_set_int(s->sws, "src_format", in->format, 0);
        av_opt_set_int(s->sws, "dstw", outlink->w, 0);
        av_opt_set_int(s->sws, "dsth", outlink->h, 0);
        av_opt_set_int(s->sws, "dst_format", outlink->format, 0);
        av_opt_set_int(s->sws, "sws_flags", SWS_BICUBIC, 0);

        if ((ret = sws_init_context(s->sws, NULL, NULL)) < 0)
            goto fail;

        sws_scale(s->sws, (const uint8_t *const *)&input, in->linesize, 0, h, out->data, out->linesize);

        out->pts = pts;
        s->frame_count++;

        ret = ff_filter_frame(outlink, out);
        if (ret < 0)
            break;

        sws_freeContext(s->sws);
        s->sws = NULL;
    }

    s->x = dx;
    s->y = dy;
    s->prev_zoom = zoom;
    s->prev_nb_frames = nb_frames;

fail:
    sws_freeContext(s->sws);
    s->sws = NULL;
    av_frame_free(&in);
    return ret;
}

static int query_formats(AVFilterContext *ctx)
{
    static const enum AVPixelFormat pix_fmts[] = {
        AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV422P,
        AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV411P,
        AV_PIX_FMT_YUV410P,  AV_PIX_FMT_YUV440P,
        AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P,
        AV_PIX_FMT_YUVA420P,
        AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
        AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
        AV_PIX_FMT_YUVJ411P,
        AV_PIX_FMT_GRAY8,
        AV_PIX_FMT_NONE
    };


    ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
    return 0;
}

static av_cold void uninit(AVFilterContext *ctx)
{
    ZPContext *s = ctx->priv;

    sws_freeContext(s->sws);
    s->sws = NULL;
}

static const AVFilterPad inputs[] = {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
    },
    { NULL }
};

static const AVFilterPad outputs[] = {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .config_props  = config_output,
    },
    { NULL }
};

AVFilter ff_vf_zoompan = {
    .name          = "zoompan",
    .description   = NULL_IF_CONFIG_SMALL("Apply Zoom & Pan effect."),
    .priv_size     = sizeof(ZPContext),
    .priv_class    = &zoompan_class,
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = inputs,
    .outputs       = outputs,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Copyright (c) 2013 Paul B Mahol
	3	*
	4	* This file is part of FFmpeg.
	5	*
	6	* FFmpeg 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.
	10	*
	11	* FFmpeg 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.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with FFmpeg; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include "libavutil/eval.h"
	22	#include "libavutil/opt.h"
	23	#include "libavutil/pixdesc.h"
	24	#include "avfilter.h"
	25	#include "formats.h"
	26	#include "internal.h"
	27	#include "video.h"
	28	#include "libswscale/swscale.h"
	29
	30	static const char *const var_names[] = {
	31	"in_w", "iw",
	32	"in_h", "ih",
	33	"out_w", "ow",
	34	"out_h", "oh",
	35	"in",
	36	"on",
	37	"duration",
	38	"pduration",
	39	"time",
	40	"frame",
	41	"zoom",
	42	"pzoom",
	43	"x", "px",
	44	"y", "py",
	45	"a",
	46	"sar",
	47	"dar",
	48	"hsub",
	49	"vsub",
	50	NULL
	51	};
	52
	53	enum var_name {
	54	VAR_IN_W, VAR_IW,
	55	VAR_IN_H, VAR_IH,
	56	VAR_OUT_W, VAR_OW,
	57	VAR_OUT_H, VAR_OH,
	58	VAR_IN,
	59	VAR_ON,
	60	VAR_DURATION,
	61	VAR_PDURATION,
	62	VAR_TIME,
	63	VAR_FRAME,
	64	VAR_ZOOM,
65	VAR_PZOOM,
66	VAR_X, VAR_PX,
67	VAR_Y, VAR_PY,
68	VAR_A,
69	VAR_SAR,
70	VAR_DAR,
71	VAR_HSUB,
72	VAR_VSUB,
73	VARS_NB
74	};
75
76	typedef struct ZPcontext {
77	const AVClass *class;
78	char *zoom_expr_str;
79	char *x_expr_str;
80	char *y_expr_str;
81	char *duration_expr_str;
82	int w, h;
83	double x, y;
84	double prev_zoom;
85	int prev_nb_frames;
86	struct SwsContext *sws;
87	int64_t frame_count;
88	} ZPContext;
89
90	#define OFFSET(x) offsetof(ZPContext, x)
91	#define FLAGS AV_OPT_FLAG_VIDEO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM
92	static const AVOption zoompan_options[] = {
93	{ "zoom", "set the zoom expression", OFFSET(zoom_expr_str), AV_OPT_TYPE_STRING, {.str = "1" }, .flags = FLAGS },
94	{ "z", "set the zoom expression", OFFSET(zoom_expr_str), AV_OPT_TYPE_STRING, {.str = "1" }, .flags = FLAGS },
95	{ "x", "set the x expression", OFFSET(x_expr_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags = FLAGS },
96	{ "y", "set the y expression", OFFSET(y_expr_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags = FLAGS },
97	{ "d", "set the duration expression", OFFSET(duration_expr_str), AV_OPT_TYPE_STRING, {.str="90"}, .flags = FLAGS },
98	{ "s", "set the output image size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, .flags = FLAGS },
99	{ NULL }
100	};
101
102	AVFILTER_DEFINE_CLASS(zoompan);
103
104	static av_cold int init(AVFilterContext *ctx)
105	{
106	ZPContext *s = ctx->priv;
107
108	s->prev_zoom = 1;
109	return 0;
110	}
111
112	static int config_output(AVFilterLink *outlink)
113	{
114	AVFilterContext *ctx = outlink->src;
115	ZPContext *s = ctx->priv;
116
117	outlink->w = s->w;
118	outlink->h = s->h;
119
120	return 0;
121	}
122
123	static int filter_frame(AVFilterLink inlink, AVFrame in)
124	{
125	AVFilterContext *ctx = inlink->dst;
126	AVFilterLink *outlink = ctx->outputs[0];
127	ZPContext *s = ctx->priv;
128	double var_values[VARS_NB], nb_frames, zoom, dx, dy;
129	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(in->format);
130	AVFrame *out;
131	int i, k, x, y, w, h, ret = 0;
132
133	var_values[VAR_IN_W] = var_values[VAR_IW] = in->width;
134	var_values[VAR_IN_H] = var_values[VAR_IH] = in->height;
135	var_values[VAR_OUT_W] = var_values[VAR_OW] = s->w;
136	var_values[VAR_OUT_H] = var_values[VAR_OH] = s->h;
137	var_values[VAR_IN] = inlink->frame_count + 1;
138	var_values[VAR_ON] = outlink->frame_count + 1;
139	var_values[VAR_PX] = s->x;
140	var_values[VAR_PY] = s->y;
141	var_values[VAR_X] = 0;
142	var_values[VAR_Y] = 0;
143	var_values[VAR_PZOOM] = s->prev_zoom;
144	var_values[VAR_ZOOM] = 1;
145	var_values[VAR_PDURATION] = s->prev_nb_frames;
146	var_values[VAR_A] = (double) in->width / in->height;
147	var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
148	(double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
149	var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
150	var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
151	var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
152
153	if ((ret = av_expr_parse_and_eval(&nb_frames, s->duration_expr_str,
154	var_names, var_values,
155	NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
156	goto fail;
157
158	var_values[VAR_DURATION] = nb_frames;
159	for (i = 0; i < nb_frames; i++) {
160	int px[4];
161	int py[4];
162	uint8_t *input[4];
163	int64_t pts = av_rescale_q(in->pts, inlink->time_base,
164	outlink->time_base) + s->frame_count;
165
166	var_values[VAR_TIME] = pts * av_q2d(outlink->time_base);
167	var_values[VAR_FRAME] = i;
168	var_values[VAR_ON] = outlink->frame_count + 1;
169	if ((ret = av_expr_parse_and_eval(&zoom, s->zoom_expr_str,
170	var_names, var_values,
171	NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
172	goto fail;
173
174	zoom = av_clipd(zoom, 1, 10);
175	var_values[VAR_ZOOM] = zoom;
176	w = in->width * (1.0 / zoom);
177	h = in->height * (1.0 / zoom);
178
179	if ((ret = av_expr_parse_and_eval(&dx, s->x_expr_str,
180	var_names, var_values,
181	NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
182	goto fail;
183	x = dx = av_clipd(dx, 0, FFMAX(in->width - w, 0));
184	var_values[VAR_X] = dx;
185	x &= ~((1 << desc->log2_chroma_w) - 1);
186
187	if ((ret = av_expr_parse_and_eval(&dy, s->y_expr_str,
188	var_names, var_values,
189	NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
190	goto fail;
191	y = dy = av_clipd(dy, 0, FFMAX(in->height - h, 0));
192	var_values[VAR_Y] = dy;
193	y &= ~((1 << desc->log2_chroma_h) - 1);
194
195	out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
196	if (!out) {
197	ret = AVERROR(ENOMEM);
198	goto fail;
199	}
200
201	px[1] = px[2] = FF_CEIL_RSHIFT(x, desc->log2_chroma_w);
202	px[0] = px[3] = x;
203
204	py[1] = py[2] = FF_CEIL_RSHIFT(y, desc->log2_chroma_h);
205	py[0] = py[3] = y;
206
207	s->sws = sws_alloc_context();
208	if (!s->sws) {
209	ret = AVERROR(ENOMEM);
210	goto fail;
211	}
212
213	for (k = 0; in->data[k]; k++)
214	input[k] = in->data[k] + py[k] * in->linesize[k] + px[k];
215
216	av_opt_set_int(s->sws, "srcw", w, 0);
217	av_opt_set_int(s->sws, "srch", h, 0);
218	av_opt_set_int(s->sws, "src_format", in->format, 0);
219	av_opt_set_int(s->sws, "dstw", outlink->w, 0);
220	av_opt_set_int(s->sws, "dsth", outlink->h, 0);
221	av_opt_set_int(s->sws, "dst_format", outlink->format, 0);
222	av_opt_set_int(s->sws, "sws_flags", SWS_BICUBIC, 0);
223
224	if ((ret = sws_init_context(s->sws, NULL, NULL)) < 0)
225	goto fail;
226
227	sws_scale(s->sws, (const uint8_t const )&input, in->linesize, 0, h, out->data, out->linesize);
228
229	out->pts = pts;
230	s->frame_count++;
231
232	ret = ff_filter_frame(outlink, out);
233	if (ret < 0)
234	break;
235
236	sws_freeContext(s->sws);
237	s->sws = NULL;
238	}
239
240	s->x = dx;
241	s->y = dy;
242	s->prev_zoom = zoom;
243	s->prev_nb_frames = nb_frames;
244
245	fail:
246	sws_freeContext(s->sws);
247	s->sws = NULL;
248	av_frame_free(&in);
249	return ret;
250	}
251
252	static int query_formats(AVFilterContext *ctx)
253	{
254	static const enum AVPixelFormat pix_fmts[] = {
255	AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
256	AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
257	AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
258	AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P,
259	AV_PIX_FMT_YUVA420P,
260	AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
261	AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
262	AV_PIX_FMT_YUVJ411P,
263	AV_PIX_FMT_GRAY8,
264	AV_PIX_FMT_NONE
265	};
266
267
268	ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
269	return 0;
270	}
271
272	static av_cold void uninit(AVFilterContext *ctx)
273	{
274	ZPContext *s = ctx->priv;
275
276	sws_freeContext(s->sws);
277	s->sws = NULL;
278	}
279
280	static const AVFilterPad inputs[] = {
281	{
282	.name = "default",
283	.type = AVMEDIA_TYPE_VIDEO,
284	.filter_frame = filter_frame,
285	},
286	{ NULL }
287	};
288
289	static const AVFilterPad outputs[] = {
290	{
291	.name = "default",
292	.type = AVMEDIA_TYPE_VIDEO,
293	.config_props = config_output,
294	},
295	{ NULL }
296	};
297
298	AVFilter ff_vf_zoompan = {
299	.name = "zoompan",
300	.description = NULL_IF_CONFIG_SMALL("Apply Zoom & Pan effect."),
301	.priv_size = sizeof(ZPContext),
302	.priv_class = &zoompan_class,
303	.init = init,
304	.uninit = uninit,
305	.query_formats = query_formats,
306	.inputs = inputs,
307	.outputs = outputs,
308	.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
309	};