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ffmpeg/libavcodec/libwebpenc_common.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* WebP encoding support via libwebp
* Copyright (c) 2013 Justin Ruggles <justin.ruggles@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* WebP encoder using libwebp: common structs and methods.
*/
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libwebpenc_common.h"
const FFCodecDefault ff_libwebp_defaults[] = {
{ "compression_level", "4" },
{ "global_quality", "-1" },
{ NULL },
};
#define OFFSET(x) offsetof(LibWebPContextCommon, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "lossless", "Use lossless mode", OFFSET(lossless), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
{ "preset", "Configuration preset", OFFSET(preset), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, WEBP_PRESET_TEXT, VE, .unit = "preset" },
{ "none", "do not use a preset", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, VE, .unit = "preset" },
{ "default", "default preset", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_DEFAULT }, 0, 0, VE, .unit = "preset" },
{ "picture", "digital picture, like portrait, inner shot", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_PICTURE }, 0, 0, VE, .unit = "preset" },
{ "photo", "outdoor photograph, with natural lighting", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_PHOTO }, 0, 0, VE, .unit = "preset" },
{ "drawing", "hand or line drawing, with high-contrast details", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_DRAWING }, 0, 0, VE, .unit = "preset" },
{ "icon", "small-sized colorful images", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_ICON }, 0, 0, VE, .unit = "preset" },
{ "text", "text-like", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_TEXT }, 0, 0, VE, .unit = "preset" },
{ "cr_threshold","Conditional replenishment threshold", OFFSET(cr_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
{ "cr_size" ,"Conditional replenishment block size", OFFSET(cr_size) , AV_OPT_TYPE_INT, { .i64 = 16 }, 0, 256, VE },
{ "quality" ,"Quality", OFFSET(quality), AV_OPT_TYPE_FLOAT, { .dbl = 75 }, 0, 100, VE },
{ NULL },
};
const AVClass ff_libwebpenc_class = {
.class_name = "libwebp encoder",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const enum AVPixelFormat ff_libwebpenc_pix_fmts[] = {
AV_PIX_FMT_RGB32,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_NONE
};
int ff_libwebp_error_to_averror(int err)
{
switch (err) {
case VP8_ENC_ERROR_OUT_OF_MEMORY:
case VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY:
return AVERROR(ENOMEM);
case VP8_ENC_ERROR_NULL_PARAMETER:
case VP8_ENC_ERROR_INVALID_CONFIGURATION:
case VP8_ENC_ERROR_BAD_DIMENSION:
return AVERROR(EINVAL);
}
return AVERROR_UNKNOWN;
}
av_cold int ff_libwebp_encode_init_common(AVCodecContext *avctx)
{
LibWebPContextCommon *s = avctx->priv_data;
int ret;
if (avctx->global_quality >= 0)
s->quality = av_clipf(avctx->global_quality / (float)FF_QP2LAMBDA,
0.0f, 100.0f);
if (avctx->compression_level < 0 || avctx->compression_level > 6) {
av_log(avctx, AV_LOG_WARNING, "invalid compression level: %d\n",
avctx->compression_level);
avctx->compression_level = av_clip(avctx->compression_level, 0, 6);
}
if (s->preset >= WEBP_PRESET_DEFAULT) {
ret = WebPConfigPreset(&s->config, s->preset, s->quality);
if (!ret)
return AVERROR_UNKNOWN;
s->lossless = s->config.lossless;
s->quality = s->config.quality;
avctx->compression_level = s->config.method;
} else {
ret = WebPConfigInit(&s->config);
if (!ret)
return AVERROR_UNKNOWN;
s->config.lossless = s->lossless;
s->config.quality = s->quality;
s->config.method = avctx->compression_level;
ret = WebPValidateConfig(&s->config);
if (!ret)
return AVERROR(EINVAL);
}
av_log(avctx, AV_LOG_DEBUG, "%s - quality=%.1f method=%d\n",
s->lossless ? "Lossless" : "Lossy", s->quality,
avctx->compression_level);
return 0;
}
int ff_libwebp_get_frame(AVCodecContext *avctx, LibWebPContextCommon *s,
const AVFrame *frame, AVFrame **alt_frame_ptr,
WebPPicture **pic_ptr) {
int ret;
WebPPicture *pic = NULL;
AVFrame *alt_frame = NULL;
if (avctx->width > WEBP_MAX_DIMENSION || avctx->height > WEBP_MAX_DIMENSION) {
av_log(avctx, AV_LOG_ERROR, "Picture size is too large. Max is %dx%d.\n",
WEBP_MAX_DIMENSION, WEBP_MAX_DIMENSION);
return AVERROR(EINVAL);
}
*pic_ptr = av_malloc(sizeof(*pic));
pic = *pic_ptr;
if (!pic)
return AVERROR(ENOMEM);
ret = WebPPictureInit(pic);
if (!ret) {
ret = AVERROR_UNKNOWN;
goto end;
}
pic->width = avctx->width;
pic->height = avctx->height;
if (avctx->pix_fmt == AV_PIX_FMT_RGB32) {
if (!s->lossless) {
/* libwebp will automatically convert RGB input to YUV when
encoding lossy. */
if (!s->conversion_warning) {
av_log(avctx, AV_LOG_WARNING,
"Using libwebp for RGB-to-YUV conversion. You may want "
"to consider passing in YUV instead for lossy "
"encoding.\n");
s->conversion_warning = 1;
}
}
pic->use_argb = 1;
pic->argb = (uint32_t *)frame->data[0];
pic->argb_stride = frame->linesize[0] / 4;
} else {
if (frame->linesize[1] != frame->linesize[2] || s->cr_threshold) {
if (!s->chroma_warning && !s->cr_threshold) {
av_log(avctx, AV_LOG_WARNING,
"Copying frame due to differing chroma linesizes.\n");
s->chroma_warning = 1;
}
*alt_frame_ptr = av_frame_alloc();
alt_frame = *alt_frame_ptr;
if (!alt_frame) {
ret = AVERROR(ENOMEM);
goto end;
}
alt_frame->width = frame->width;
alt_frame->height = frame->height;
alt_frame->format = frame->format;
if (s->cr_threshold)
alt_frame->format = AV_PIX_FMT_YUVA420P;
ret = av_frame_get_buffer(alt_frame, 0);
if (ret < 0)
goto end;
alt_frame->format = frame->format;
av_frame_copy(alt_frame, frame);
frame = alt_frame;
if (s->cr_threshold) {
int x,y, x2, y2, p;
int bs = s->cr_size;
if (!s->ref) {
s->ref = av_frame_clone(frame);
if (!s->ref) {
ret = AVERROR(ENOMEM);
goto end;
}
}
alt_frame->format = AV_PIX_FMT_YUVA420P;
for (y = 0; y < frame->height; y+= bs) {
for (x = 0; x < frame->width; x+= bs) {
int skip;
int sse = 0;
for (p = 0; p < 3; p++) {
int bs2 = bs >> !!p;
int w = AV_CEIL_RSHIFT(frame->width , !!p);
int h = AV_CEIL_RSHIFT(frame->height, !!p);
int xs = x >> !!p;
int ys = y >> !!p;
for (y2 = ys; y2 < FFMIN(ys + bs2, h); y2++) {
for (x2 = xs; x2 < FFMIN(xs + bs2, w); x2++) {
int diff = frame->data[p][frame->linesize[p] * y2 + x2]
-s->ref->data[p][frame->linesize[p] * y2 + x2];
sse += diff*diff;
}
}
}
skip = sse < s->cr_threshold && frame->data[3] != s->ref->data[3];
if (!skip)
for (p = 0; p < 3; p++) {
int bs2 = bs >> !!p;
int w = AV_CEIL_RSHIFT(frame->width , !!p);
int h = AV_CEIL_RSHIFT(frame->height, !!p);
int xs = x >> !!p;
int ys = y >> !!p;
for (y2 = ys; y2 < FFMIN(ys + bs2, h); y2++) {
memcpy(&s->ref->data[p][frame->linesize[p] * y2 + xs],
& frame->data[p][frame->linesize[p] * y2 + xs], FFMIN(bs2, w-xs));
}
}
for (y2 = y; y2 < FFMIN(y+bs, frame->height); y2++) {
memset(&frame->data[3][frame->linesize[3] * y2 + x],
skip ? 0 : 255,
FFMIN(bs, frame->width-x));
}
}
}
}
}
pic->use_argb = 0;
pic->y = frame->data[0];
pic->u = frame->data[1];
pic->v = frame->data[2];
pic->y_stride = frame->linesize[0];
pic->uv_stride = frame->linesize[1];
if (frame->format == AV_PIX_FMT_YUVA420P) {
pic->colorspace = WEBP_YUV420A;
pic->a = frame->data[3];
pic->a_stride = frame->linesize[3];
if (alt_frame)
WebPCleanupTransparentArea(pic);
} else {
pic->colorspace = WEBP_YUV420;
}
if (s->lossless) {
/* We do not have a way to automatically prioritize RGB over YUV
in automatic pixel format conversion based on whether we're
encoding lossless or lossy, so we do conversion with libwebp as
a convenience. */
if (!s->conversion_warning) {
av_log(avctx, AV_LOG_WARNING,
"Using libwebp for YUV-to-RGB conversion. You may want "
"to consider passing in RGB instead for lossless "
"encoding.\n");
s->conversion_warning = 1;
}
#if (WEBP_ENCODER_ABI_VERSION <= 0x201)
/* libwebp should do the conversion automatically, but there is a
bug that causes it to return an error instead, so a work-around
is required.
See https://code.google.com/p/webp/issues/detail?id=178 */
pic->memory_ = (void*)1; /* something non-null */
ret = WebPPictureYUVAToARGB(pic);
if (!ret) {
av_log(avctx, AV_LOG_ERROR,
"WebPPictureYUVAToARGB() failed with error: %d\n",
pic->error_code);
ret = libwebp_error_to_averror(pic->error_code);
goto end;
}
pic->memory_ = NULL; /* restore pointer */
#endif
}
}
end:
return ret;
}
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