/* * AVS2 decoding using the davs2 library * * Copyright (C) 2018 Yiqun Xu, * Falei Luo, * Huiwen Ren, * * This file is part of FFmpeg. * * 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. * * 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "avcodec.h" #include "davs2.h" typedef struct DAVS2Context { void *decoder; AVFrame *frame; davs2_param_t param; // decoding parameters davs2_packet_t packet; // input bitstream davs2_picture_t out_frame; // output data, frame data davs2_seq_info_t headerset; // output data, sequence header }DAVS2Context; static av_cold int davs2_init(AVCodecContext *avctx) { DAVS2Context *cad = avctx->priv_data; int cpu_flags = av_get_cpu_flags(); /* init the decoder */ cad->param.threads = avctx->thread_count; cad->param.info_level = 0; cad->param.disable_avx = !(cpu_flags & AV_CPU_FLAG_AVX && cpu_flags & AV_CPU_FLAG_AVX2); cad->decoder = davs2_decoder_open(&cad->param); if (!cad->decoder) { av_log(avctx, AV_LOG_ERROR, "decoder created error."); return AVERROR_EXTERNAL; } av_log(avctx, AV_LOG_VERBOSE, "decoder created. %p\n", cad->decoder); return 0; } static int davs2_dump_frames(AVCodecContext *avctx, davs2_picture_t *pic, int *got_frame, davs2_seq_info_t *headerset, int ret_type, AVFrame *frame) { DAVS2Context *cad = avctx->priv_data; int bytes_per_sample = pic->bytes_per_sample; int plane = 0; int line = 0; if (!headerset) { *got_frame = 0; return 0; } if (!pic || ret_type == DAVS2_GOT_HEADER) { avctx->width = headerset->width; avctx->height = headerset->height; avctx->pix_fmt = headerset->output_bit_depth == 10 ? AV_PIX_FMT_YUV420P10 : AV_PIX_FMT_YUV420P; avctx->framerate = av_d2q(headerset->frame_rate,4096); *got_frame = 0; return 0; } switch (pic->type) { case DAVS2_PIC_I: case DAVS2_PIC_G: frame->pict_type = AV_PICTURE_TYPE_I; break; case DAVS2_PIC_P: case DAVS2_PIC_S: frame->pict_type = AV_PICTURE_TYPE_P; break; case DAVS2_PIC_B: frame->pict_type = AV_PICTURE_TYPE_B; break; case DAVS2_PIC_F: frame->pict_type = AV_PICTURE_TYPE_S; break; default: av_log(avctx, AV_LOG_ERROR, "Decoder error: unknown frame type\n"); return AVERROR_EXTERNAL; } for (plane = 0; plane < 3; ++plane) { int size_line = pic->widths[plane] * bytes_per_sample; frame->buf[plane] = av_buffer_alloc(size_line * pic->lines[plane]); if (!frame->buf[plane]){ av_log(avctx, AV_LOG_ERROR, "Decoder error: allocation failure, can't dump frames.\n"); return AVERROR(ENOMEM); } frame->data[plane] = frame->buf[plane]->data; frame->linesize[plane] = size_line; for (line = 0; line < pic->lines[plane]; ++line) memcpy(frame->data[plane] + line * size_line, pic->planes[plane] + line * pic->strides[plane], pic->widths[plane] * bytes_per_sample); } frame->width = cad->headerset.width; frame->height = cad->headerset.height; frame->pts = cad->out_frame.pts; frame->format = avctx->pix_fmt; *got_frame = 1; return 0; } static void davs2_flush(AVCodecContext *avctx) { DAVS2Context *cad = avctx->priv_data; int ret = DAVS2_GOT_FRAME; while (ret == DAVS2_GOT_FRAME) { ret = davs2_decoder_flush(cad->decoder, &cad->headerset, &cad->out_frame); davs2_decoder_frame_unref(cad->decoder, &cad->out_frame); } if (ret == DAVS2_ERROR) { av_log(avctx, AV_LOG_WARNING, "Decoder flushing failed.\n"); } } static int send_delayed_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame) { DAVS2Context *cad = avctx->priv_data; int ret = DAVS2_DEFAULT; ret = davs2_decoder_flush(cad->decoder, &cad->headerset, &cad->out_frame); if (ret == DAVS2_ERROR) { av_log(avctx, AV_LOG_ERROR, "Decoder error: can't flush delayed frame\n"); return AVERROR_EXTERNAL; } if (ret == DAVS2_GOT_FRAME) { ret = davs2_dump_frames(avctx, &cad->out_frame, got_frame, &cad->headerset, ret, frame); davs2_decoder_frame_unref(cad->decoder, &cad->out_frame); } return ret; } static av_cold int davs2_end(AVCodecContext *avctx) { DAVS2Context *cad = avctx->priv_data; /* close the decoder */ if (cad->decoder) { davs2_decoder_close(cad->decoder); cad->decoder = NULL; } return 0; } static int davs2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { DAVS2Context *cad = avctx->priv_data; int buf_size = avpkt->size; uint8_t *buf_ptr = avpkt->data; AVFrame *frame = data; int ret = DAVS2_DEFAULT; /* end of stream, output what is still in the buffers */ if (!buf_size) { return send_delayed_frame(avctx, frame, got_frame); } cad->packet.data = buf_ptr; cad->packet.len = buf_size; cad->packet.pts = avpkt->pts; cad->packet.dts = avpkt->dts; ret = davs2_decoder_send_packet(cad->decoder, &cad->packet); if (ret == DAVS2_ERROR) { av_log(avctx, AV_LOG_ERROR, "Decoder error: can't read packet\n"); return AVERROR_EXTERNAL; } ret = davs2_decoder_recv_frame(cad->decoder, &cad->headerset, &cad->out_frame); if (ret != DAVS2_DEFAULT) { ret = davs2_dump_frames(avctx, &cad->out_frame, got_frame, &cad->headerset, ret, frame); davs2_decoder_frame_unref(cad->decoder, &cad->out_frame); } return ret == 0 ? buf_size : ret; } AVCodec ff_libdavs2_decoder = { .name = "libdavs2", .long_name = NULL_IF_CONFIG_SMALL("libdavs2 AVS2-P2/IEEE1857.4"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_AVS2, .priv_data_size = sizeof(DAVS2Context), .init = davs2_init, .close = davs2_end, .decode = davs2_decode_frame, .flush = davs2_flush, .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS, .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, .wrapper_name = "libdavs2", };