| /* |
| * AVS2 decoding using the davs2 library |
| * |
| * Copyright (C) 2018 Yiqun Xu, <yiqun.xu@vipl.ict.ac.cn> |
| * Falei Luo, <falei.luo@gmail.com> |
| * Huiwen Ren, <hwrenx@gmail.com> |
| * |
| * 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", |
| }; |