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/*
* Copyright (c) 2010, Google, Inc.
*
* This file is part of Libav.
*
* Libav 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,
* 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
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* VP8 decoder support via libvpx
*/
#define VPX_CODEC_DISABLE_COMPAT 1
#include <vpx/vpx_decoder.h>
#include <vpx/vp8dx.h>
#include "libavutil/imgutils.h"
#include "avcodec.h"
typedef struct VP8DecoderContext {
struct vpx_codec_ctx decoder;
} VP8Context;
static av_cold int vp8_init(AVCodecContext *avctx)
{
VP8Context *ctx = avctx->priv_data;
const struct vpx_codec_iface *iface = &vpx_codec_vp8_dx_algo;
struct vpx_codec_dec_cfg deccfg = {
/* token partitions+1 would be a decent choice */
.threads = FFMIN(avctx->thread_count, 16)
};
av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
if (vpx_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != VPX_CODEC_OK) {
const char *error = vpx_codec_error(&ctx->decoder);
av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
error);
return AVERROR(EINVAL);
}
avctx->pix_fmt = PIX_FMT_YUV420P;
return 0;
}
static int vp8_decode(AVCodecContext *avctx,
void *data, int *data_size, AVPacket *avpkt)
{
VP8Context *ctx = avctx->priv_data;
AVFrame *picture = data;
const void *iter = NULL;
struct vpx_image *img;
if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
VPX_CODEC_OK) {
const char *error = vpx_codec_error(&ctx->decoder);
const char *detail = vpx_codec_error_detail(&ctx->decoder);
av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
if (detail)
av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
detail);
return AVERROR_INVALIDDATA;
}
if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
if (img->fmt != VPX_IMG_FMT_I420) {
av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d)\n",
img->fmt);
return AVERROR_INVALIDDATA;
}
if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
avctx->width, avctx->height, img->d_w, img->d_h);
if (av_image_check_size(img->d_w, img->d_h, 0, avctx))
return AVERROR_INVALIDDATA;
avcodec_set_dimensions(avctx, img->d_w, img->d_h);
}
picture->data[0] = img->planes[0];
picture->data[1] = img->planes[1];
picture->data[2] = img->planes[2];
picture->data[3] = NULL;
picture->linesize[0] = img->stride[0];
picture->linesize[1] = img->stride[1];
picture->linesize[2] = img->stride[2];
picture->linesize[3] = 0;
*data_size = sizeof(AVPicture);
}
return avpkt->size;
}
static av_cold int vp8_free(AVCodecContext *avctx)
{
VP8Context *ctx = avctx->priv_data;
vpx_codec_destroy(&ctx->decoder);
return 0;
}
AVCodec ff_libvpx_decoder = {
"libvpx",
AVMEDIA_TYPE_VIDEO,
CODEC_ID_VP8,
sizeof(VP8Context),
vp8_init,
NULL, /* encode */
vp8_free,
vp8_decode,
0, /* capabilities */
.long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
};
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