FFmpeg
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 "codec_internal.h"
28 #include "encode.h"
29 #include "libwebpenc_common.h"
30 
32 
34 {
35  return ff_libwebp_encode_init_common(avctx);
36 }
37 
39  const AVFrame *frame, int *got_packet)
40 {
41  LibWebPContext *s = avctx->priv_data;
42  WebPPicture *pic = NULL;
43  AVFrame *alt_frame = NULL;
44  WebPMemoryWriter mw = { 0 };
45 
46  int ret = ff_libwebp_get_frame(avctx, s, frame, &alt_frame, &pic);
47  if (ret < 0)
48  goto end;
49 
50  WebPMemoryWriterInit(&mw);
51  pic->custom_ptr = &mw;
52  pic->writer = WebPMemoryWrite;
53 
54  ret = WebPEncode(&s->config, pic);
55  if (!ret) {
56  av_log(avctx, AV_LOG_ERROR, "WebPEncode() failed with error: %d\n",
57  pic->error_code);
58  ret = ff_libwebp_error_to_averror(pic->error_code);
59  goto end;
60  }
61 
62  ret = ff_get_encode_buffer(avctx, pkt, mw.size, 0);
63  if (ret < 0)
64  goto end;
65  memcpy(pkt->data, mw.mem, mw.size);
66 
67  *got_packet = 1;
68 
69 end:
70 #if (WEBP_ENCODER_ABI_VERSION > 0x0203)
71  WebPMemoryWriterClear(&mw);
72 #else
73  free(mw.mem); /* must use free() according to libwebp documentation */
74 #endif
75  WebPPictureFree(pic);
76  av_freep(&pic);
77  av_frame_free(&alt_frame);
78 
79  return ret;
80 }
81 
83 {
85  av_frame_free(&s->ref);
86 
87  return 0;
88 }
89 
91  .p.name = "libwebp",
92  CODEC_LONG_NAME("libwebp WebP image"),
93  .p.type = AVMEDIA_TYPE_VIDEO,
94  .p.id = AV_CODEC_ID_WEBP,
96  .p.pix_fmts = ff_libwebpenc_pix_fmts,
97  .p.priv_class = &ff_libwebpenc_class,
98  .p.wrapper_name = "libwebp",
99  .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE,
100  .priv_data_size = sizeof(LibWebPContext),
104  .close = libwebp_encode_close,
105 };
ff_libwebp_error_to_averror
int ff_libwebp_error_to_averror(int err)
Definition: libwebpenc_common.c:67
defaults
static const FFCodecDefault defaults[]
Definition: amfenc_av1.c:456
ff_libwebp_encode_init_common
av_cold int ff_libwebp_encode_init_common(AVCodecContext *avctx)
Definition: libwebpenc_common.c:81
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:100
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
AVPacket::data
uint8_t * data
Definition: packet.h:522
encode.h
FF_CODEC_CAP_NOT_INIT_THREADSAFE
#define FF_CODEC_CAP_NOT_INIT_THREADSAFE
The codec is not known to be init-threadsafe (i.e.
Definition: codec_internal.h:34
FFCodec
Definition: codec_internal.h:127
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
FF_CODEC_ENCODE_CB
#define FF_CODEC_ENCODE_CB(func)
Definition: codec_internal.h:315
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
s
#define s(width, name)
Definition: cbs_vp9.c:198
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE
#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:159
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:272
frame
static AVFrame * frame
Definition: demux_decode.c:54
NULL
#define NULL
Definition: coverity.c:32
ff_libwebp_encoder
const FFCodec ff_libwebp_encoder
Definition: libwebpenc.c:90
ff_libwebp_defaults
const FFCodecDefault ff_libwebp_defaults[]
Definition: libwebpenc_common.c:30
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:365
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:523
codec_internal.h
LibWebPContextCommon
Definition: libwebpenc_common.h:39
libwebp_encode_frame
static int libwebp_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: libwebpenc.c:38
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:194
AV_CODEC_ID_WEBP
@ AV_CODEC_ID_WEBP
Definition: codec_id.h:224
ret
ret
Definition: filter_design.txt:187
libwebp_encode_init
static av_cold int libwebp_encode_init(AVCodecContext *avctx)
Definition: libwebpenc.c:33
AVCodecContext
main external API structure.
Definition: avcodec.h:445
libwebp_encode_close
static int libwebp_encode_close(AVCodecContext *avctx)
Definition: libwebpenc.c:82
ff_get_encode_buffer
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
Get a buffer for a packet.
Definition: encode.c:105
ff_libwebp_get_frame
int ff_libwebp_get_frame(AVCodecContext *avctx, LibWebPContextCommon *s, const AVFrame *frame, AVFrame **alt_frame_ptr, WebPPicture **pic_ptr)
Definition: libwebpenc_common.c:124
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:472
AVPacket
This structure stores compressed data.
Definition: packet.h:499
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
ff_libwebpenc_pix_fmts
enum AVPixelFormat ff_libwebpenc_pix_fmts[]
Definition: libwebpenc_common.c:61
libwebpenc_common.h
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
LibWebPContext
LibWebPContextCommon LibWebPContext
Definition: libwebpenc.c:31
ff_libwebpenc_class
const AVClass ff_libwebpenc_class
Definition: libwebpenc_common.c:54