2018-07-27 13:59:38 +00:00
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/*
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* AVS2 decoding using the davs2 library
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*
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* Copyright (C) 2018 Yiqun Xu, <yiqun.xu@vipl.ict.ac.cn>
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* Falei Luo, <falei.luo@gmail.com>
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* Huiwen Ren, <hwrenx@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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#include "libavutil/avassert.h"
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#include "libavutil/common.h"
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#include "libavutil/avutil.h"
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#include "avcodec.h"
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#include "libavutil/imgutils.h"
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#include "internal.h"
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#include "davs2.h"
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typedef struct DAVS2Context {
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void *decoder;
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AVFrame *frame;
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davs2_param_t param; // decoding parameters
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davs2_packet_t packet; // input bitstream
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int decoded_frames;
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davs2_picture_t out_frame; // output data, frame data
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davs2_seq_info_t headerset; // output data, sequence header
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}DAVS2Context;
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static av_cold int davs2_init(AVCodecContext *avctx)
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{
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DAVS2Context *cad = avctx->priv_data;
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/* init the decoder */
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cad->param.threads = avctx->thread_count;
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cad->param.info_level = 0;
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cad->decoder = davs2_decoder_open(&cad->param);
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if (!cad->decoder) {
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av_log(avctx, AV_LOG_ERROR, "decoder created error.");
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return AVERROR(EINVAL);
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}
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av_log(avctx, AV_LOG_VERBOSE, "decoder created. %p\n", cad->decoder);
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return 0;
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}
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static int davs2_dump_frames(AVCodecContext *avctx, davs2_picture_t *pic,
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davs2_seq_info_t *headerset, int ret_type, AVFrame *frame)
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{
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DAVS2Context *cad = avctx->priv_data;
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int bytes_per_sample = pic->bytes_per_sample;
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int plane = 0;
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int line = 0;
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if (!headerset)
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return 0;
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if (!pic || ret_type == DAVS2_GOT_HEADER) {
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avctx->width = headerset->width;
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avctx->height = headerset->height;
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avctx->pix_fmt = headerset->output_bit_depth == 10 ?
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AV_PIX_FMT_YUV420P10 : AV_PIX_FMT_YUV420P;
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avctx->framerate = av_d2q(headerset->frame_rate,4096);
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return 0;
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}
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for (plane = 0; plane < 3; ++plane) {
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int size_line = pic->widths[plane] * bytes_per_sample;
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frame->buf[plane] = av_buffer_alloc(size_line * pic->lines[plane]);
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if (!frame->buf[plane]){
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av_log(avctx, AV_LOG_ERROR, "dump error: alloc failed.\n");
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return AVERROR(EINVAL);
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}
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frame->data[plane] = frame->buf[plane]->data;
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frame->linesize[plane] = pic->widths[plane];
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for (line = 0; line < pic->lines[plane]; ++line)
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memcpy(frame->data[plane] + line * size_line,
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pic->planes[plane] + line * pic->strides[plane],
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pic->widths[plane] * bytes_per_sample);
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}
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frame->width = cad->headerset.width;
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frame->height = cad->headerset.height;
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frame->pts = cad->out_frame.pts;
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frame->pict_type = pic->type;
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frame->format = avctx->pix_fmt;
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cad->decoded_frames++;
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return 1;
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}
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static av_cold int davs2_end(AVCodecContext *avctx)
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{
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DAVS2Context *cad = avctx->priv_data;
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/* close the decoder */
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if (cad->decoder) {
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davs2_decoder_close(cad->decoder);
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cad->decoder = NULL;
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}
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return 0;
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}
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static int davs2_decode_frame(AVCodecContext *avctx, void *data,
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int *got_frame, AVPacket *avpkt)
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{
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DAVS2Context *cad = avctx->priv_data;
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int buf_size = avpkt->size;
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uint8_t *buf_ptr = avpkt->data;
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AVFrame *frame = data;
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int ret = DAVS2_DEFAULT;
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if (!buf_size) {
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return 0;
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}
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cad->packet.data = buf_ptr;
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cad->packet.len = buf_size;
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cad->packet.pts = avpkt->pts;
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cad->packet.dts = avpkt->dts;
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ret = davs2_decoder_send_packet(cad->decoder, &cad->packet);
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if (ret == DAVS2_ERROR) {
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av_log(avctx, AV_LOG_ERROR, "Decoder error: can't read packet\n");
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return AVERROR(EINVAL);
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}
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ret = davs2_decoder_recv_frame(cad->decoder, &cad->headerset, &cad->out_frame);
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if (ret != DAVS2_DEFAULT) {
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*got_frame = davs2_dump_frames(avctx, &cad->out_frame, &cad->headerset, ret, frame);
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davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
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}
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return buf_size;
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}
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AVCodec ff_libdavs2_decoder = {
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.name = "libdavs2",
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2018-08-07 10:39:34 +00:00
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.long_name = NULL_IF_CONFIG_SMALL("libdavs2 AVS2-P2/IEEE1857.4"),
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2018-07-27 13:59:38 +00:00
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_AVS2,
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.priv_data_size = sizeof(DAVS2Context),
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.init = davs2_init,
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.close = davs2_end,
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.decode = davs2_decode_frame,
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.capabilities = AV_CODEC_CAP_DELAY,//AV_CODEC_CAP_DR1 |
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.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10,
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AV_PIX_FMT_NONE },
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.wrapper_name = "libdavs2",
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};
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