1 /*
2 * WebP encoding support via libwebp
3 * Copyright (c) 2013 Justin Ruggles <justin.ruggles@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
22 /**
23 * @file
24 * WebP encoder using libwebp (WebPEncode API)
25 */
26
28
30
32 {
34 }
35
38 {
40 WebPPicture *pic =
NULL;
42 WebPMemoryWriter mw = { 0 };
43
45 if (ret < 0)
47
48 WebPMemoryWriterInit(&mw);
49 pic->custom_ptr = &mw;
50 pic->writer = WebPMemoryWrite;
51
52 ret = WebPEncode(&s->
config, pic);
53 if (!ret) {
55 pic->error_code);
58 }
59
61 if (ret < 0)
63 memcpy(pkt->
data, mw.mem, mw.size);
64
66 *got_packet = 1;
67
69 #if (WEBP_ENCODER_ABI_VERSION > 0x0203)
70 WebPMemoryWriterClear(&mw);
71 #else
72 free(mw.mem); /* must use free() according to libwebp documentation */
73 #endif
74 WebPPictureFree(pic);
77
78 return ret;
79 }
80
82 {
85
86 return 0;
87 }
88
94 };
95
109 },
110 .priv_class = &class,
112 };
This structure describes decoded (raw) audio or video data.
#define LIBAVUTIL_VERSION_INT
static av_cold int init(AVCodecContext *avctx)
static int libwebp_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
static int libwebp_encode_close(AVCodecContext *avctx)
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
static av_cold int end(AVCodecContext *avctx)
const OptionDef options[]
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
WebP encoder using libwebp: common structs and methods.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#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.
int ff_libwebp_get_frame(AVCodecContext *avctx, LibWebPContextCommon *s, const AVFrame *frame, AVFrame **alt_frame_ptr, WebPPicture **pic_ptr)
av_cold int ff_libwebp_encode_init_common(AVCodecContext *avctx)
int flags
A combination of AV_PKT_FLAG values.
LibWebPContextCommon LibWebPContext
static const AVCodecDefault libwebp_defaults[]
static av_cold int libwebp_encode_init(AVCodecContext *avctx)
int ff_libwebp_error_to_averror(int err)
main external API structure.
Describe the class of an AVClass context structure.
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
static enum AVPixelFormat pix_fmts[]
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
AVPixelFormat
Pixel format.
This structure stores compressed data.
AVCodec ff_libwebp_encoder