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https://github.com/FFmpeg/FFmpeg.git
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737eb5976f
It is pretty hopeless that other considerable projects will adopt libavutil alone in other projects. Projects that need small footprint are better off with more specialized libraries such as gnulib or rather just copy the necessary parts that they need. With this in mind, nobody is helped by having libavutil and libavcore split. In order to ease maintenance inside and around FFmpeg and to reduce confusion where to put common code, avcore's functionality is merged (back) to avutil. Signed-off-by: Reinhard Tartler <siretart@tauware.de>
126 lines
4.0 KiB
C
126 lines
4.0 KiB
C
/*
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* Copyright (c) 2010, Google, Inc.
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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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* VP8 decoder support via libvpx
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*/
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#define VPX_CODEC_DISABLE_COMPAT 1
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#include <vpx/vpx_decoder.h>
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#include <vpx/vp8dx.h>
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#include "libavutil/imgutils.h"
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#include "avcodec.h"
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typedef struct VP8DecoderContext {
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struct vpx_codec_ctx decoder;
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} VP8Context;
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static av_cold int vp8_init(AVCodecContext *avctx)
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{
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VP8Context *ctx = avctx->priv_data;
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const struct vpx_codec_iface *iface = &vpx_codec_vp8_dx_algo;
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struct vpx_codec_dec_cfg deccfg = {
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/* token partitions+1 would be a decent choice */
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.threads = FFMIN(avctx->thread_count, 16)
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};
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av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
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av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
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if (vpx_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != VPX_CODEC_OK) {
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const char *error = vpx_codec_error(&ctx->decoder);
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av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
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error);
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return AVERROR(EINVAL);
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}
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avctx->pix_fmt = PIX_FMT_YUV420P;
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return 0;
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}
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static int vp8_decode(AVCodecContext *avctx,
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void *data, int *data_size, AVPacket *avpkt)
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{
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VP8Context *ctx = avctx->priv_data;
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AVFrame *picture = data;
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const void *iter = NULL;
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struct vpx_image *img;
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if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
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VPX_CODEC_OK) {
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const char *error = vpx_codec_error(&ctx->decoder);
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const char *detail = vpx_codec_error_detail(&ctx->decoder);
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av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
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if (detail)
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av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
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detail);
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return AVERROR_INVALIDDATA;
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}
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if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
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if (img->fmt != VPX_IMG_FMT_I420) {
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av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d)\n",
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img->fmt);
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return AVERROR_INVALIDDATA;
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}
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if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
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av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
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avctx->width, avctx->height, img->d_w, img->d_h);
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if (av_image_check_size(img->d_w, img->d_h, 0, avctx))
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return AVERROR_INVALIDDATA;
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avcodec_set_dimensions(avctx, img->d_w, img->d_h);
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}
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picture->data[0] = img->planes[0];
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picture->data[1] = img->planes[1];
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picture->data[2] = img->planes[2];
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picture->data[3] = NULL;
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picture->linesize[0] = img->stride[0];
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picture->linesize[1] = img->stride[1];
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picture->linesize[2] = img->stride[2];
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picture->linesize[3] = 0;
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*data_size = sizeof(AVPicture);
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}
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return avpkt->size;
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}
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static av_cold int vp8_free(AVCodecContext *avctx)
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{
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VP8Context *ctx = avctx->priv_data;
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vpx_codec_destroy(&ctx->decoder);
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return 0;
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}
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AVCodec ff_libvpx_decoder = {
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"libvpx",
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AVMEDIA_TYPE_VIDEO,
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CODEC_ID_VP8,
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sizeof(VP8Context),
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vp8_init,
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NULL, /* encode */
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vp8_free,
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vp8_decode,
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0, /* capabilities */
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.long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
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};
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