FFmpeg: libavcodec/libwebpenc.c Source File

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libwebpenc.c
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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
27#include "libavutil/mem.h"
28#include "codec_internal.h"
29#include "encode.h"
30#include "libwebpenc_common.h"
31
32 typedef LibWebPContextCommon LibWebPContext;
33
35{
37}
38
40 const AVFrame *frame, int *got_packet)
41{
42 LibWebPContext *s = avctx->priv_data;
43 WebPPicture *pic = NULL;
44 AVFrame *alt_frame = NULL;
45 WebPMemoryWriter mw = { 0 };
46
47 int ret = ff_libwebp_get_frame(avctx, s, frame, &alt_frame, &pic);
48 if (ret < 0)
49 goto end;
50
51 WebPMemoryWriterInit(&mw);
52 pic->custom_ptr = &mw;
53 pic->writer = WebPMemoryWrite;
54
55 ret = WebPEncode(&s->config, pic);
56 if (!ret) {
57 av_log(avctx, AV_LOG_ERROR, "WebPEncode() failed with error: %d\n",
58 pic->error_code);
59 ret = ff_libwebp_error_to_averror(pic->error_code);
60 goto end;
61 }
62
63 ret = ff_get_encode_buffer(avctx, pkt, mw.size, 0);
64 if (ret < 0)
65 goto end;
66 memcpy(pkt->data, mw.mem, mw.size);
67
68 *got_packet = 1;
69
70end:
71#if (WEBP_ENCODER_ABI_VERSION > 0x0203)
72 WebPMemoryWriterClear(&mw);
73#else
74 free(mw.mem); /* must use free() according to libwebp documentation */
75#endif
76 WebPPictureFree(pic);
77 av_freep(&pic);
78 av_frame_free(&alt_frame);
79
80 return ret;
81}
82
84{
86 av_frame_free(&s->ref);
87
88 return 0;
89}
90
92 .p.name = "libwebp",
93 CODEC_LONG_NAME("libwebp WebP image"),
94 .p.type = AVMEDIA_TYPE_VIDEO,
95 .p.id = AV_CODEC_ID_WEBP,
98 .color_ranges = AVCOL_RANGE_MPEG,
99 .p.priv_class = &ff_libwebpenc_class,
100 .p.wrapper_name = "libwebp",
101 .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE,
102 .priv_data_size = sizeof(LibWebPContext),
106 .close = libwebp_encode_close,
107};
const FFCodec ff_libwebp_encoder
Definition libwebpenc.c:91
static const FFCodecDefault defaults[]
Definition amfenc_av1.c:723
s
#define s(width, name)
Definition cbs_vp9.c:198
#define CODEC_PIXFMTS_ARRAY(array)
#define FF_CODEC_CAP_NOT_INIT_THREADSAFE
The codec is not known to be init-threadsafe (i.e.
#define FF_CODEC_ENCODE_CB(func)
#define CODEC_LONG_NAME(str)
#define NULL
Definition coverity.c:32
static AVPacket * pkt
Definition demux_decode.c:55
static AVFrame * frame
Definition demux_decode.c:54
int(* init)(AVBSFContext *ctx)
Definition dts2pts.c:608
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
Get a buffer for a packet.
Definition encode.c:106
#define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE
This encoder can reorder user opaque values from input AVFrames and return them with corresponding ou...
Definition codec.h:147
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition codec.h:49
@ AV_CODEC_ID_WEBP
Definition codec_id.h:221
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition frame.c:64
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition log.h:210
@ AVMEDIA_TYPE_VIDEO
Definition avutil.h:200
#define av_cold
Definition attributes.h:117
LibWebPContextCommon LibWebPContext
Definition libwebpenc.c:32
static int libwebp_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition libwebpenc.c:39
static int libwebp_encode_close(AVCodecContext *avctx)
Definition libwebpenc.c:83
static av_cold int libwebp_encode_init(AVCodecContext *avctx)
Definition libwebpenc.c:34
int ff_libwebp_get_frame(AVCodecContext *avctx, LibWebPContextCommon *s, const AVFrame *frame, AVFrame **alt_frame_ptr, WebPPicture **pic_ptr)
const AVClass ff_libwebpenc_class
enum AVPixelFormat ff_libwebpenc_pix_fmts[]
av_cold int ff_libwebp_encode_init_common(AVCodecContext *avctx)
int ff_libwebp_error_to_averror(int err)
const FFCodecDefault ff_libwebp_defaults[]
WebP encoder using libwebp: common structs and methods.
Memory handling functions.
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
Definition pixfmt.h:766
main external API structure.
Definition avcodec.h:443
void * priv_data
Definition avcodec.h:470
This structure describes decoded (raw) audio or video data.
Definition frame.h:472
This structure stores compressed data.
Definition packet.h:580
#define av_freep(p)
#define av_log(a,...)
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