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https://github.com/FFmpeg/FFmpeg.git
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6aad1204cc
This is in preparation of switching the default init-thread-safety to a codec being init-thread-safe. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
148 lines
5.0 KiB
C
148 lines
5.0 KiB
C
/*
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* WebP encoding support via libwebp
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* Copyright (c) 2015 Urvang Joshi
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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 (WebPAnimEncoder API)
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*/
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#include "config.h"
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#include "codec_internal.h"
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#include "encode.h"
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#include "libwebpenc_common.h"
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#include <webp/mux.h>
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typedef struct LibWebPAnimContext {
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LibWebPContextCommon cc;
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WebPAnimEncoder *enc; // the main AnimEncoder object
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int64_t first_frame_pts; // pts of the first encoded frame.
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int done; // If true, we have assembled the bitstream already
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} LibWebPAnimContext;
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static av_cold int libwebp_anim_encode_init(AVCodecContext *avctx)
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{
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int ret = ff_libwebp_encode_init_common(avctx);
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if (!ret) {
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LibWebPAnimContext *s = avctx->priv_data;
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WebPAnimEncoderOptions enc_options = { { 0 } };
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WebPAnimEncoderOptionsInit(&enc_options);
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enc_options.verbose = av_log_get_level() >= AV_LOG_VERBOSE;
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// TODO(urvang): Expose some options on command-line perhaps.
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s->enc = WebPAnimEncoderNew(avctx->width, avctx->height, &enc_options);
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if (!s->enc)
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return AVERROR(EINVAL);
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s->first_frame_pts = AV_NOPTS_VALUE;
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s->done = 0;
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}
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return ret;
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}
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static int libwebp_anim_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *frame, int *got_packet) {
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LibWebPAnimContext *s = avctx->priv_data;
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int ret;
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if (!frame) {
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if (s->done) { // Second flush: return empty package to denote finish.
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*got_packet = 0;
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return 0;
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} else { // First flush: assemble bitstream and return it.
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WebPData assembled_data = { 0 };
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ret = WebPAnimEncoderAssemble(s->enc, &assembled_data);
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if (ret) {
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ret = ff_get_encode_buffer(avctx, pkt, assembled_data.size, 0);
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if (ret < 0) {
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WebPDataClear(&assembled_data);
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return ret;
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}
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memcpy(pkt->data, assembled_data.bytes, assembled_data.size);
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WebPDataClear(&assembled_data);
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s->done = 1;
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pkt->pts = pkt->dts = s->first_frame_pts;
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*got_packet = 1;
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return 0;
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} else {
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WebPDataClear(&assembled_data);
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av_log(s, AV_LOG_ERROR,
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"WebPAnimEncoderAssemble() failed with error: %d\n",
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VP8_ENC_ERROR_OUT_OF_MEMORY);
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return AVERROR(ENOMEM);
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}
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}
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} else {
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int timestamp_ms;
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WebPPicture *pic = NULL;
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AVFrame *alt_frame = NULL;
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ret = ff_libwebp_get_frame(avctx, &s->cc, frame, &alt_frame, &pic);
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if (ret < 0)
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goto end;
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timestamp_ms =
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avctx->time_base.num * frame->pts * 1000 / avctx->time_base.den;
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ret = WebPAnimEncoderAdd(s->enc, pic, timestamp_ms, &s->cc.config);
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if (!ret) {
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av_log(avctx, AV_LOG_ERROR,
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"Encoding WebP frame failed with error: %d\n",
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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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}
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if (!avctx->frame_number)
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s->first_frame_pts = frame->pts;
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ret = 0;
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*got_packet = 0;
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end:
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WebPPictureFree(pic);
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av_freep(&pic);
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av_frame_free(&alt_frame);
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return ret;
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}
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}
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static int libwebp_anim_encode_close(AVCodecContext *avctx)
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{
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LibWebPAnimContext *s = avctx->priv_data;
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av_frame_free(&s->cc.ref);
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WebPAnimEncoderDelete(s->enc);
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return 0;
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}
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const FFCodec ff_libwebp_anim_encoder = {
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.p.name = "libwebp_anim",
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.p.long_name = NULL_IF_CONFIG_SMALL("libwebp WebP image"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_WEBP,
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.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
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.p.pix_fmts = ff_libwebpenc_pix_fmts,
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.p.priv_class = &ff_libwebpenc_class,
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.p.wrapper_name = "libwebp",
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.caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE,
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.priv_data_size = sizeof(LibWebPAnimContext),
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.defaults = ff_libwebp_defaults,
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.init = libwebp_anim_encode_init,
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FF_CODEC_ENCODE_CB(libwebp_anim_encode_frame),
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.close = libwebp_anim_encode_close,
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};
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