WebP encoder: extract out some methods into a separate helper library.
This is the 2nd patch in preparation for using WebPAnimEncoder API for encoding and muxing WebP images. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Urvang Joshi
Michael Niedermayer
parent
a0124b89e3
commit
f99fed733d
@ -783,7 +783,7 @@ OBJS-$(CONFIG_LIBVPX_VP8_ENCODER) += libvpxenc.o
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OBJS-$(CONFIG_LIBVPX_VP9_DECODER) += libvpxdec.o libvpx.o
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OBJS-$(CONFIG_LIBVPX_VP9_DECODER) += libvpxdec.o libvpx.o
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OBJS-$(CONFIG_LIBVPX_VP9_ENCODER) += libvpxenc.o libvpx.o
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OBJS-$(CONFIG_LIBVPX_VP9_ENCODER) += libvpxenc.o libvpx.o
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OBJS-$(CONFIG_LIBWAVPACK_ENCODER) += libwavpackenc.o
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OBJS-$(CONFIG_LIBWAVPACK_ENCODER) += libwavpackenc.o
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OBJS-$(CONFIG_LIBWEBP_ENCODER) += libwebpenc.o
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OBJS-$(CONFIG_LIBWEBP_ENCODER) += libwebpenc_common.o libwebpenc.o
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OBJS-$(CONFIG_LIBX264_ENCODER) += libx264.o
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OBJS-$(CONFIG_LIBX264_ENCODER) += libx264.o
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OBJS-$(CONFIG_LIBX265_ENCODER) += libx265.o
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OBJS-$(CONFIG_LIBX265_ENCODER) += libx265.o
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OBJS-$(CONFIG_LIBXAVS_ENCODER) += libxavs.o
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OBJS-$(CONFIG_LIBXAVS_ENCODER) += libxavs.o
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@ -21,254 +21,29 @@
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/**
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/**
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* @file
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* @file
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* WebP encoder using libwebp
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* WebP encoder using libwebp (WebPEncode API)
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*/
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*/
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#include <webp/encode.h>
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#include "libwebpenc_common.h"
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#include "libavutil/common.h"
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typedef LibWebPContextCommon LibWebPContext;
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#include "libavutil/frame.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "internal.h"
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typedef struct LibWebPContext {
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AVClass *class; // class for AVOptions
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float quality; // lossy quality 0 - 100
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int lossless; // use lossless encoding
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int preset; // configuration preset
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int chroma_warning; // chroma linesize mismatch warning has been printed
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int conversion_warning; // pixel format conversion warning has been printed
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WebPConfig config; // libwebp configuration
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AVFrame *ref;
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int cr_size;
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int cr_threshold;
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} LibWebPContext;
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static int libwebp_error_to_averror(int err)
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{
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switch (err) {
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case VP8_ENC_ERROR_OUT_OF_MEMORY:
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case VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY:
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return AVERROR(ENOMEM);
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case VP8_ENC_ERROR_NULL_PARAMETER:
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case VP8_ENC_ERROR_INVALID_CONFIGURATION:
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case VP8_ENC_ERROR_BAD_DIMENSION:
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return AVERROR(EINVAL);
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}
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return AVERROR_UNKNOWN;
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}
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static av_cold int libwebp_encode_init(AVCodecContext *avctx)
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static av_cold int libwebp_encode_init(AVCodecContext *avctx)
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{
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{
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LibWebPContext *s = avctx->priv_data;
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return ff_libwebp_encode_init_common(avctx);
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int ret;
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if (avctx->global_quality >= 0)
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s->quality = av_clipf(avctx->global_quality / (float)FF_QP2LAMBDA,
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0.0f, 100.0f);
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if (avctx->compression_level < 0 || avctx->compression_level > 6) {
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av_log(avctx, AV_LOG_WARNING, "invalid compression level: %d\n",
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avctx->compression_level);
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avctx->compression_level = av_clip(avctx->compression_level, 0, 6);
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}
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if (s->preset >= WEBP_PRESET_DEFAULT) {
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ret = WebPConfigPreset(&s->config, s->preset, s->quality);
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if (!ret)
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return AVERROR_UNKNOWN;
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s->lossless = s->config.lossless;
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s->quality = s->config.quality;
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avctx->compression_level = s->config.method;
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} else {
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ret = WebPConfigInit(&s->config);
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if (!ret)
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return AVERROR_UNKNOWN;
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s->config.lossless = s->lossless;
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s->config.quality = s->quality;
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s->config.method = avctx->compression_level;
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ret = WebPValidateConfig(&s->config);
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if (!ret)
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return AVERROR(EINVAL);
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}
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av_log(avctx, AV_LOG_DEBUG, "%s - quality=%.1f method=%d\n",
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s->lossless ? "Lossless" : "Lossy", s->quality,
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avctx->compression_level);
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return 0;
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}
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}
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static int libwebp_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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static int libwebp_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *frame, int *got_packet)
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const AVFrame *frame, int *got_packet)
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{
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{
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LibWebPContext *s = avctx->priv_data;
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LibWebPContext *s = avctx->priv_data;
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AVFrame *alt_frame = NULL;
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WebPPicture *pic = NULL;
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WebPPicture *pic = NULL;
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AVFrame *alt_frame = NULL;
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WebPMemoryWriter mw = { 0 };
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WebPMemoryWriter mw = { 0 };
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int ret;
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if (avctx->width > WEBP_MAX_DIMENSION || avctx->height > WEBP_MAX_DIMENSION) {
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int ret = ff_libwebp_get_frame(avctx, s, frame, &alt_frame, &pic);
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av_log(avctx, AV_LOG_ERROR, "Picture size is too large. Max is %dx%d.\n",
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if (ret < 0)
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WEBP_MAX_DIMENSION, WEBP_MAX_DIMENSION);
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return AVERROR(EINVAL);
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}
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pic = av_malloc(sizeof(*pic));
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if (!pic)
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return AVERROR(ENOMEM);
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ret = WebPPictureInit(pic);
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if (!ret) {
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ret = AVERROR_UNKNOWN;
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goto end;
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goto end;
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}
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pic->width = avctx->width;
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pic->height = avctx->height;
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if (avctx->pix_fmt == AV_PIX_FMT_RGB32) {
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if (!s->lossless) {
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/* libwebp will automatically convert RGB input to YUV when
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encoding lossy. */
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if (!s->conversion_warning) {
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av_log(avctx, AV_LOG_WARNING,
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"Using libwebp for RGB-to-YUV conversion. You may want "
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"to consider passing in YUV instead for lossy "
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"encoding.\n");
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s->conversion_warning = 1;
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}
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}
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pic->use_argb = 1;
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pic->argb = (uint32_t *)frame->data[0];
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pic->argb_stride = frame->linesize[0] / 4;
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} else {
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if (frame->linesize[1] != frame->linesize[2] || s->cr_threshold) {
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if (!s->chroma_warning && !s->cr_threshold) {
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av_log(avctx, AV_LOG_WARNING,
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"Copying frame due to differing chroma linesizes.\n");
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s->chroma_warning = 1;
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}
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alt_frame = av_frame_alloc();
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if (!alt_frame) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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alt_frame->width = frame->width;
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alt_frame->height = frame->height;
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alt_frame->format = frame->format;
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if (s->cr_threshold)
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alt_frame->format = AV_PIX_FMT_YUVA420P;
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ret = av_frame_get_buffer(alt_frame, 32);
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if (ret < 0)
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goto end;
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alt_frame->format = frame->format;
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av_frame_copy(alt_frame, frame);
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frame = alt_frame;
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if (s->cr_threshold) {
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int x,y, x2, y2, p;
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int bs = s->cr_size;
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if (!s->ref) {
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s->ref = av_frame_clone(frame);
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if (!s->ref) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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}
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alt_frame->format = AV_PIX_FMT_YUVA420P;
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for (y = 0; y < frame->height; y+= bs) {
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for (x = 0; x < frame->width; x+= bs) {
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int skip;
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int sse = 0;
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for (p = 0; p < 3; p++) {
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int bs2 = bs >> !!p;
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int w = FF_CEIL_RSHIFT(frame->width , !!p);
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int h = FF_CEIL_RSHIFT(frame->height, !!p);
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int xs = x >> !!p;
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int ys = y >> !!p;
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for (y2 = ys; y2 < FFMIN(ys + bs2, h); y2++) {
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for (x2 = xs; x2 < FFMIN(xs + bs2, w); x2++) {
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int diff = frame->data[p][frame->linesize[p] * y2 + x2]
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-s->ref->data[p][frame->linesize[p] * y2 + x2];
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sse += diff*diff;
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}
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}
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}
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skip = sse < s->cr_threshold && frame->data[3] != s->ref->data[3];
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if (!skip)
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for (p = 0; p < 3; p++) {
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int bs2 = bs >> !!p;
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int w = FF_CEIL_RSHIFT(frame->width , !!p);
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int h = FF_CEIL_RSHIFT(frame->height, !!p);
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int xs = x >> !!p;
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int ys = y >> !!p;
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for (y2 = ys; y2 < FFMIN(ys + bs2, h); y2++) {
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memcpy(&s->ref->data[p][frame->linesize[p] * y2 + xs],
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& frame->data[p][frame->linesize[p] * y2 + xs], FFMIN(bs2, w-xs));
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}
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}
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for (y2 = y; y2 < FFMIN(y+bs, frame->height); y2++) {
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memset(&frame->data[3][frame->linesize[3] * y2 + x],
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skip ? 0 : 255,
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FFMIN(bs, frame->width-x));
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}
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}
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}
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}
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}
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pic->use_argb = 0;
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pic->y = frame->data[0];
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pic->u = frame->data[1];
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pic->v = frame->data[2];
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pic->y_stride = frame->linesize[0];
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pic->uv_stride = frame->linesize[1];
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if (frame->format == AV_PIX_FMT_YUVA420P) {
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pic->colorspace = WEBP_YUV420A;
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pic->a = frame->data[3];
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pic->a_stride = frame->linesize[3];
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if (alt_frame)
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WebPCleanupTransparentArea(pic);
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} else {
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pic->colorspace = WEBP_YUV420;
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}
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if (s->lossless) {
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/* We do not have a way to automatically prioritize RGB over YUV
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in automatic pixel format conversion based on whether we're
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encoding lossless or lossy, so we do conversion with libwebp as
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a convenience. */
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if (!s->conversion_warning) {
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av_log(avctx, AV_LOG_WARNING,
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"Using libwebp for YUV-to-RGB conversion. You may want "
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"to consider passing in RGB instead for lossless "
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"encoding.\n");
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s->conversion_warning = 1;
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}
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#if (WEBP_ENCODER_ABI_VERSION <= 0x201)
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/* libwebp should do the conversion automatically, but there is a
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bug that causes it to return an error instead, so a work-around
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is required.
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See https://code.google.com/p/webp/issues/detail?id=178 */
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pic->memory_ = (void*)1; /* something non-null */
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ret = WebPPictureYUVAToARGB(pic);
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if (!ret) {
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av_log(avctx, AV_LOG_ERROR,
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"WebPPictureYUVAToARGB() failed with error: %d\n",
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pic->error_code);
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ret = libwebp_error_to_averror(pic->error_code);
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goto end;
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}
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pic->memory_ = NULL; /* restore pointer */
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#endif
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}
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}
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WebPMemoryWriterInit(&mw);
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WebPMemoryWriterInit(&mw);
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pic->custom_ptr = &mw;
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pic->custom_ptr = &mw;
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@ -278,7 +53,7 @@ static int libwebp_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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if (!ret) {
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if (!ret) {
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av_log(avctx, AV_LOG_ERROR, "WebPEncode() failed with error: %d\n",
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av_log(avctx, AV_LOG_ERROR, "WebPEncode() failed with error: %d\n",
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pic->error_code);
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pic->error_code);
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ret = libwebp_error_to_averror(pic->error_code);
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ret = ff_libwebp_error_to_averror(pic->error_code);
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goto end;
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goto end;
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}
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}
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@ -305,45 +80,9 @@ end:
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static int libwebp_encode_close(AVCodecContext *avctx)
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static int libwebp_encode_close(AVCodecContext *avctx)
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{
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{
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LibWebPContext *s = avctx->priv_data;
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return ff_libwebp_encode_close_common(avctx);
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av_frame_free(&s->ref);
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return 0;
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}
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}
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#define OFFSET(x) offsetof(LibWebPContext, x)
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "lossless", "Use lossless mode", OFFSET(lossless), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
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{ "preset", "Configuration preset", OFFSET(preset), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, WEBP_PRESET_TEXT, VE, "preset" },
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{ "none", "do not use a preset", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, VE, "preset" },
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{ "default", "default preset", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_DEFAULT }, 0, 0, VE, "preset" },
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{ "picture", "digital picture, like portrait, inner shot", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_PICTURE }, 0, 0, VE, "preset" },
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{ "photo", "outdoor photograph, with natural lighting", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_PHOTO }, 0, 0, VE, "preset" },
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{ "drawing", "hand or line drawing, with high-contrast details", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_DRAWING }, 0, 0, VE, "preset" },
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{ "icon", "small-sized colorful images", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_ICON }, 0, 0, VE, "preset" },
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{ "text", "text-like", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_TEXT }, 0, 0, VE, "preset" },
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{ "cr_threshold","Conditional replenishment threshold", OFFSET(cr_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
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{ "cr_size" ,"Conditional replenishment block size", OFFSET(cr_size) , AV_OPT_TYPE_INT, { .i64 = 16 }, 0, 256, VE },
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{ "quality" ,"Quality", OFFSET(quality), AV_OPT_TYPE_FLOAT, { .dbl = 75 }, 0, 100, VE },
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{ NULL },
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};
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static const AVClass class = {
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.class_name = "libwebp",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVCodecDefault libwebp_defaults[] = {
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{ "compression_level", "4" },
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{ "global_quality", "-1" },
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{ NULL },
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};
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AVCodec ff_libwebp_encoder = {
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AVCodec ff_libwebp_encoder = {
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.name = "libwebp",
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.name = "libwebp",
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.long_name = NULL_IF_CONFIG_SMALL("libwebp WebP image"),
|
.long_name = NULL_IF_CONFIG_SMALL("libwebp WebP image"),
|
||||||
|
|||||||
261
libavcodec/libwebpenc_common.c
Normal file
261
libavcodec/libwebpenc_common.c
Normal file
@ -0,0 +1,261 @@
|
|||||||
|
/*
|
||||||
|
* 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 "libwebpenc_common.h"
|
||||||
|
|
||||||
|
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, 32);
|
||||||
|
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 = FF_CEIL_RSHIFT(frame->width , !!p);
|
||||||
|
int h = FF_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 = FF_CEIL_RSHIFT(frame->width , !!p);
|
||||||
|
int h = FF_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;
|
||||||
|
}
|
||||||
|
|
||||||
|
int ff_libwebp_encode_close_common(AVCodecContext *avctx)
|
||||||
|
{
|
||||||
|
LibWebPContextCommon *s = avctx->priv_data;
|
||||||
|
av_frame_free(&s->ref);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
89
libavcodec/libwebpenc_common.h
Normal file
89
libavcodec/libwebpenc_common.h
Normal file
@ -0,0 +1,89 @@
|
|||||||
|
/*
|
||||||
|
* 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 <webp/encode.h>
|
||||||
|
|
||||||
|
#include "libavutil/common.h"
|
||||||
|
#include "libavutil/frame.h"
|
||||||
|
#include "libavutil/imgutils.h"
|
||||||
|
#include "libavutil/opt.h"
|
||||||
|
#include "avcodec.h"
|
||||||
|
#include "internal.h"
|
||||||
|
|
||||||
|
typedef struct LibWebPContextCommon {
|
||||||
|
AVClass *class; // class for AVOptions
|
||||||
|
float quality; // lossy quality 0 - 100
|
||||||
|
int lossless; // use lossless encoding
|
||||||
|
int preset; // configuration preset
|
||||||
|
int chroma_warning; // chroma linesize mismatch warning has been printed
|
||||||
|
int conversion_warning; // pixel format conversion warning has been printed
|
||||||
|
WebPConfig config; // libwebp configuration
|
||||||
|
AVFrame *ref;
|
||||||
|
int cr_size;
|
||||||
|
int cr_threshold;
|
||||||
|
} LibWebPContextCommon;
|
||||||
|
|
||||||
|
int ff_libwebp_error_to_averror(int err);
|
||||||
|
|
||||||
|
av_cold int ff_libwebp_encode_init_common(AVCodecContext *avctx);
|
||||||
|
|
||||||
|
int ff_libwebp_get_frame(AVCodecContext *avctx, LibWebPContextCommon *s,
|
||||||
|
const AVFrame *frame, AVFrame **alt_frame_ptr,
|
||||||
|
WebPPicture **pic_ptr);
|
||||||
|
|
||||||
|
int ff_libwebp_encode_close_common(AVCodecContext *avctx);
|
||||||
|
|
||||||
|
#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, "preset" },
|
||||||
|
{ "none", "do not use a preset", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, VE, "preset" },
|
||||||
|
{ "default", "default preset", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_DEFAULT }, 0, 0, VE, "preset" },
|
||||||
|
{ "picture", "digital picture, like portrait, inner shot", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_PICTURE }, 0, 0, VE, "preset" },
|
||||||
|
{ "photo", "outdoor photograph, with natural lighting", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_PHOTO }, 0, 0, VE, "preset" },
|
||||||
|
{ "drawing", "hand or line drawing, with high-contrast details", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_DRAWING }, 0, 0, VE, "preset" },
|
||||||
|
{ "icon", "small-sized colorful images", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_ICON }, 0, 0, VE, "preset" },
|
||||||
|
{ "text", "text-like", 0, AV_OPT_TYPE_CONST, { .i64 = WEBP_PRESET_TEXT }, 0, 0, VE, "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 },
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
static const AVClass class = {
|
||||||
|
.class_name = "libwebp",
|
||||||
|
.item_name = av_default_item_name,
|
||||||
|
.option = options,
|
||||||
|
.version = LIBAVUTIL_VERSION_INT,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const AVCodecDefault libwebp_defaults[] = {
|
||||||
|
{ "compression_level", "4" },
|
||||||
|
{ "global_quality", "-1" },
|
||||||
|
{ NULL },
|
||||||
|
};
|
||||||
Loading…
x
Reference in New Issue
Block a user