1 /*
2 * WebP encoding support via libwebp
3 * Copyright (c) 2015 Urvang Joshi
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 (WebPAnimEncoder API)
25 */
26
29
30 #include <webp/mux.h>
31
34 WebPAnimEncoder *
enc;
// the main AnimEncoder object
36 int done;
// If true, we have assembled the bitstream already
38
40 {
42 if (!ret) {
44 WebPAnimEncoderOptions enc_options;
45 WebPAnimEncoderOptionsInit(&enc_options);
46 // TODO(urvang): Expose some options on command-line perhaps.
47 s->
enc = WebPAnimEncoderNew(avctx->
width, avctx->
height, &enc_options);
52 }
53 return ret;
54 }
55
59 int ret;
60
61 if (!frame) {
62 if (s->
done) {
// Second flush: return empty package to denote finish.
63 *got_packet = 0;
64 return 0;
65 } else { // First flush: assemble bitstream and return it.
66 WebPData assembled_data = { 0 };
67 ret = WebPAnimEncoderAssemble(s->
enc, &assembled_data);
68 if (ret) {
70 if (ret < 0)
71 return ret;
72 memcpy(pkt->
data, assembled_data.bytes, assembled_data.size);
76 *got_packet = 1;
77 return 0;
78 } else {
80 "WebPAnimEncoderAssemble() failed with error: %d\n",
81 VP8_ENC_ERROR_OUT_OF_MEMORY);
83 }
84 }
85 } else {
86 int timestamp_ms;
87 WebPPicture *pic =
NULL;
90 if (ret < 0)
92
93 timestamp_ms =
95 ret = WebPAnimEncoderAdd(s->
enc, pic, timestamp_ms, &s->
cc.
config);
96 if (!ret) {
98 "Encoding WebP frame failed with error: %d\n",
99 pic->error_code);
102 }
103
106 ret = 0;
107 *got_packet = 1;
108
110 WebPPictureFree(pic);
113 return ret;
114 }
115 }
116
118 {
121 WebPAnimEncoderDelete(s->
enc);
122
123 return 0;
124 }
125
131 };
132
134 .
name =
"libwebp_anim",
147 },
148 .priv_class = &class,
150 };
AVCodec ff_libwebp_anim_encoder
This structure describes decoded (raw) audio or video data.
static int libwebp_anim_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
#define LIBAVUTIL_VERSION_INT
static av_cold int init(AVCodecContext *avctx)
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
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_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
static av_cold int end(AVCodecContext *avctx)
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
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.
static av_cold int libwebp_anim_encode_init(AVCodecContext *avctx)
#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.
int width
picture width / height.
static const AVCodecDefault libwebp_defaults[]
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)
static int libwebp_anim_encode_close(AVCodecContext *avctx)
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
AVPixelFormat
Pixel format.
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...