1 /*
2 * Librsvg rasterization wrapper
3 * Copyright (c) 2017 Rostislav Pehlivanov <atomnuker@gmail.com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
25 #include "librsvg-2.0/librsvg/rsvg.h"
26
29
34
36 {
37 int ret;
40
41 RsvgHandle *handle;
42 RsvgDimensionData unscaled_dimensions, dimensions;
43 cairo_surface_t *image;
44 cairo_t *crender =
NULL;
46
47 *got_frame = 0;
48
49 handle = rsvg_handle_new_from_data(pkt->
data, pkt->
size, &error);
50 if (error) {
52 g_error_free(error);
54 }
55
56 rsvg_handle_get_dimensions(handle, &dimensions);
57 rsvg_handle_get_dimensions(handle, &unscaled_dimensions);
58 dimensions.width = s->
width ? s->
width : dimensions.width;
59 dimensions.height = s->
height ? s->
height : dimensions.height;
61 double default_ar = unscaled_dimensions.width/(double)unscaled_dimensions.height;
63 dimensions.width =
lrintf(dimensions.height * default_ar);
64 else
65 dimensions.height =
lrintf(dimensions.width / default_ar);
66 }
67
69 return ret;
71
73 return ret;
76
77 image = cairo_image_surface_create_for_data(frame->
data[0], CAIRO_FORMAT_ARGB32,
80 if (cairo_surface_status(image) != CAIRO_STATUS_SUCCESS)
82
83 crender = cairo_create(image);
84
85 cairo_save(crender);
86 cairo_set_operator(crender, CAIRO_OPERATOR_CLEAR);
87 cairo_paint(crender);
88 cairo_restore(crender);
89
90 cairo_scale(crender, dimensions.width / (double)unscaled_dimensions.width,
91 dimensions.height / (double)unscaled_dimensions.height);
92
93 rsvg_handle_render_cairo(handle, crender);
94
95 cairo_destroy(crender);
96 cairo_surface_destroy(image);
97 g_object_unref(handle);
98
99 *got_frame = 1;
100
101 return 0;
102 }
103
104 #define OFFSET(x) offsetof(LibRSVGContext, x)
105 #define DEC (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
111 };
112
118 };
119
129 .wrapper_name = "librsvg",
130 };
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
#define LIBAVUTIL_VERSION_INT
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
const char * av_default_item_name(void *ptr)
Return the context name.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
enum AVPictureType pict_type
Picture type of the frame.
int width
picture width / height.
static void error(const char *err)
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
static const AVClass librsvg_decoder_class
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Describe the class of an AVClass context structure.
static const AVOption options[]
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal api header.
AVCodec ff_librsvg_decoder
#define AV_CODEC_CAP_LOSSLESS
Codec is lossless.
static int librsvg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *pkt)
int key_frame
1 -> keyframe, 0-> not
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.