2 * AVS2 decoding using the davs2 library
4 * Copyright (C) 2018 Yiqun Xu, <yiqun.xu@vipl.ict.ac.cn>
5 * Falei Luo, <falei.luo@gmail.com>
6 * Huiwen Ren, <hwrenx@gmail.com>
8 * This file is part of FFmpeg.
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 typedef struct DAVS2Context {
32 davs2_param_t param; // decoding parameters
33 davs2_packet_t packet; // input bitstream
37 davs2_picture_t out_frame; // output data, frame data
38 davs2_seq_info_t headerset; // output data, sequence header
42 static av_cold int davs2_init(AVCodecContext *avctx)
44 DAVS2Context *cad = avctx->priv_data;
46 /* init the decoder */
47 cad->param.threads = avctx->thread_count;
48 cad->param.info_level = 0;
49 cad->decoder = davs2_decoder_open(&cad->param);
52 av_log(avctx, AV_LOG_ERROR, "decoder created error.");
53 return AVERROR_EXTERNAL;
56 av_log(avctx, AV_LOG_VERBOSE, "decoder created. %p\n", cad->decoder);
60 static int davs2_dump_frames(AVCodecContext *avctx, davs2_picture_t *pic,
61 davs2_seq_info_t *headerset, int ret_type, AVFrame *frame)
63 DAVS2Context *cad = avctx->priv_data;
64 int bytes_per_sample = pic->bytes_per_sample;
71 if (!pic || ret_type == DAVS2_GOT_HEADER) {
72 avctx->width = headerset->width;
73 avctx->height = headerset->height;
74 avctx->pix_fmt = headerset->output_bit_depth == 10 ?
75 AV_PIX_FMT_YUV420P10 : AV_PIX_FMT_YUV420P;
77 avctx->framerate = av_d2q(headerset->frame_rate,4096);
81 for (plane = 0; plane < 3; ++plane) {
82 int size_line = pic->widths[plane] * bytes_per_sample;
83 frame->buf[plane] = av_buffer_alloc(size_line * pic->lines[plane]);
85 if (!frame->buf[plane]){
86 av_log(avctx, AV_LOG_ERROR, "dump error: alloc failed.\n");
87 return AVERROR(ENOMEM);
90 frame->data[plane] = frame->buf[plane]->data;
91 frame->linesize[plane] = pic->widths[plane];
93 for (line = 0; line < pic->lines[plane]; ++line)
94 memcpy(frame->data[plane] + line * size_line,
95 pic->planes[plane] + line * pic->strides[plane],
96 pic->widths[plane] * bytes_per_sample);
99 frame->width = cad->headerset.width;
100 frame->height = cad->headerset.height;
101 frame->pts = cad->out_frame.pts;
102 frame->pict_type = pic->type;
103 frame->format = avctx->pix_fmt;
105 cad->decoded_frames++;
109 static av_cold int davs2_end(AVCodecContext *avctx)
111 DAVS2Context *cad = avctx->priv_data;
113 /* close the decoder */
115 davs2_decoder_close(cad->decoder);
122 static int davs2_decode_frame(AVCodecContext *avctx, void *data,
123 int *got_frame, AVPacket *avpkt)
125 DAVS2Context *cad = avctx->priv_data;
126 int buf_size = avpkt->size;
127 uint8_t *buf_ptr = avpkt->data;
128 AVFrame *frame = data;
129 int ret = DAVS2_DEFAULT;
135 cad->packet.data = buf_ptr;
136 cad->packet.len = buf_size;
137 cad->packet.pts = avpkt->pts;
138 cad->packet.dts = avpkt->dts;
140 ret = davs2_decoder_send_packet(cad->decoder, &cad->packet);
143 if (ret == DAVS2_ERROR) {
144 av_log(avctx, AV_LOG_ERROR, "Decoder error: can't read packet\n");
145 return AVERROR_EXTERNAL;
148 ret = davs2_decoder_recv_frame(cad->decoder, &cad->headerset, &cad->out_frame);
150 if (ret != DAVS2_DEFAULT) {
151 *got_frame = davs2_dump_frames(avctx, &cad->out_frame, &cad->headerset, ret, frame);
152 davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
158 AVCodec ff_libdavs2_decoder = {
160 .long_name = NULL_IF_CONFIG_SMALL("libdavs2 AVS2-P2/IEEE1857.4"),
161 .type = AVMEDIA_TYPE_VIDEO,
162 .id = AV_CODEC_ID_AVS2,
163 .priv_data_size = sizeof(DAVS2Context),
166 .decode = davs2_decode_frame,
167 .capabilities = AV_CODEC_CAP_DELAY,//AV_CODEC_CAP_DR1 |
168 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P10,
170 .wrapper_name = "libdavs2",