mirror of https://github.com/FFmpeg/FFmpeg.git
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>pull/137/head
Urvang Joshi
10 years ago
committed by
Michael Niedermayer
parent
a0124b89e3
commit
f99fed733d
4 changed files with 360 additions and 271 deletions
@ -0,0 +1,261 @@ |
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/*
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* WebP encoding support via libwebp |
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* Copyright (c) 2013 Justin Ruggles <justin.ruggles@gmail.com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file |
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* WebP encoder using libwebp: common structs and methods. |
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*/ |
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#include "libwebpenc_common.h" |
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int ff_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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av_cold int ff_libwebp_encode_init_common(AVCodecContext *avctx) |
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{ |
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LibWebPContextCommon *s = avctx->priv_data; |
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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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int ff_libwebp_get_frame(AVCodecContext *avctx, LibWebPContextCommon *s, |
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const AVFrame *frame, AVFrame **alt_frame_ptr, |
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WebPPicture **pic_ptr) { |
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int ret; |
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WebPPicture *pic = NULL; |
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AVFrame *alt_frame = NULL; |
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if (avctx->width > WEBP_MAX_DIMENSION || avctx->height > WEBP_MAX_DIMENSION) { |
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av_log(avctx, AV_LOG_ERROR, "Picture size is too large. Max is %dx%d.\n", |
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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_ptr = av_malloc(sizeof(*pic)); |
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pic = *pic_ptr; |
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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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} |
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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_ptr = av_frame_alloc(); |
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alt_frame = *alt_frame_ptr; |
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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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end: |
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return ret; |
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} |
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int ff_libwebp_encode_close_common(AVCodecContext *avctx) |
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{ |
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LibWebPContextCommon *s = avctx->priv_data; |
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av_frame_free(&s->ref); |
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return 0; |
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} |
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@ -0,0 +1,89 @@ |
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/*
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* WebP encoding support via libwebp |
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* Copyright (c) 2013 Justin Ruggles <justin.ruggles@gmail.com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file |
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* WebP encoder using libwebp: common structs and methods. |
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*/ |
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#include <webp/encode.h> |
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#include "libavutil/common.h" |
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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 LibWebPContextCommon { |
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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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} LibWebPContextCommon; |
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int ff_libwebp_error_to_averror(int err); |
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av_cold int ff_libwebp_encode_init_common(AVCodecContext *avctx); |
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int ff_libwebp_get_frame(AVCodecContext *avctx, LibWebPContextCommon *s, |
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const AVFrame *frame, AVFrame **alt_frame_ptr, |
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WebPPicture **pic_ptr); |
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int ff_libwebp_encode_close_common(AVCodecContext *avctx); |
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#define OFFSET(x) offsetof(LibWebPContextCommon, 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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