* WebP encoding support via libwebp
* Copyright (c) 2013 Justin Ruggles <justin.ruggles@gmail.com>
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * 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
+ * WebP encoder using libwebp (WebPEncode API)
*/
-#include <webp/encode.h>
+#include "libwebpenc_common.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 LibWebPContext {
- 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
-} LibWebPContext;
-
-static int 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;
-}
+typedef LibWebPContextCommon LibWebPContext;
static av_cold int libwebp_encode_init(AVCodecContext *avctx)
{
- LibWebPContext *s = avctx->priv_data;
- int ret;
-
- if (avctx->global_quality < 0)
- avctx->global_quality = 75 * FF_QP2LAMBDA;
- 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;
+ return ff_libwebp_encode_init_common(avctx);
}
static int libwebp_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *frame, int *got_packet)
{
LibWebPContext *s = avctx->priv_data;
- AVFrame *alt_frame = NULL;
WebPPicture *pic = NULL;
+ AVFrame *alt_frame = NULL;
WebPMemoryWriter mw = { 0 };
- int ret;
- 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 = av_malloc(sizeof(*pic));
- if (!pic)
- return AVERROR(ENOMEM);
-
- ret = WebPPictureInit(pic);
- if (!ret) {
- ret = AVERROR_UNKNOWN;
+ int ret = ff_libwebp_get_frame(avctx, s, frame, &alt_frame, &pic);
+ if (ret < 0)
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]) {
- if (!s->chroma_warning) {
- av_log(avctx, AV_LOG_WARNING,
- "Copying frame due to differing chroma linesizes.\n");
- s->chroma_warning = 1;
- }
- alt_frame = av_frame_alloc();
- if (!alt_frame) {
- ret = AVERROR(ENOMEM);
- goto end;
- }
- alt_frame->width = frame->width;
- alt_frame->height = frame->height;
- alt_frame->format = frame->format;
- ret = av_frame_get_buffer(alt_frame, 32);
- if (ret < 0)
- goto end;
- av_frame_copy(alt_frame, frame);
- frame = alt_frame;
- }
- 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 (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) {
- pic->colorspace = WEBP_YUV420A;
- pic->a = frame->data[3];
- pic->a_stride = frame->linesize[3];
- } 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
- }
- }
WebPMemoryWriterInit(&mw);
pic->custom_ptr = &mw;
if (!ret) {
av_log(avctx, AV_LOG_ERROR, "WebPEncode() failed with error: %d\n",
pic->error_code);
- ret = libwebp_error_to_averror(pic->error_code);
+ ret = ff_libwebp_error_to_averror(pic->error_code);
goto end;
}
return ret;
}
-#define OFFSET(x) offsetof(LibWebPContext, 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" },
- { NULL },
-};
+static int libwebp_encode_close(AVCodecContext *avctx)
+{
+ LibWebPContextCommon *s = avctx->priv_data;
+ av_frame_free(&s->ref);
+
+ return 0;
+}
static const AVClass class = {
.class_name = "libwebp",
.version = LIBAVUTIL_VERSION_INT,
};
-static const AVCodecDefault libwebp_defaults[] = {
- { "compression_level", "4" },
- { "global_quality", "-1" },
- { NULL },
-};
-
AVCodec ff_libwebp_encoder = {
.name = "libwebp",
.long_name = NULL_IF_CONFIG_SMALL("libwebp WebP image"),
.priv_data_size = sizeof(LibWebPContext),
.init = libwebp_encode_init,
.encode2 = libwebp_encode_frame,
+ .close = libwebp_encode_close,
.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_RGB32,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P,
projects / ffmpeg / blobdiff