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
35 davs2_picture_t out_frame; // output data, frame data
36 davs2_seq_info_t headerset; // output data, sequence header
40 static av_cold int davs2_init(AVCodecContext *avctx)
42 DAVS2Context *cad = avctx->priv_data;
44 /* init the decoder */
45 cad->param.threads = avctx->thread_count;
46 cad->param.info_level = 0;
47 cad->decoder = davs2_decoder_open(&cad->param);
50 av_log(avctx, AV_LOG_ERROR, "decoder created error.");
51 return AVERROR_EXTERNAL;
54 av_log(avctx, AV_LOG_VERBOSE, "decoder created. %p\n", cad->decoder);
58 static int davs2_dump_frames(AVCodecContext *avctx, davs2_picture_t *pic,
59 davs2_seq_info_t *headerset, int ret_type, AVFrame *frame)
61 DAVS2Context *cad = avctx->priv_data;
62 int bytes_per_sample = pic->bytes_per_sample;
69 if (!pic || ret_type == DAVS2_GOT_HEADER) {
70 avctx->width = headerset->width;
71 avctx->height = headerset->height;
72 avctx->pix_fmt = headerset->output_bit_depth == 10 ?
73 AV_PIX_FMT_YUV420P10 : AV_PIX_FMT_YUV420P;
75 avctx->framerate = av_d2q(headerset->frame_rate,4096);
79 for (plane = 0; plane < 3; ++plane) {
80 int size_line = pic->widths[plane] * bytes_per_sample;
81 frame->buf[plane] = av_buffer_alloc(size_line * pic->lines[plane]);
83 if (!frame->buf[plane]){
84 av_log(avctx, AV_LOG_ERROR, "dump error: alloc failed.\n");
85 return AVERROR(ENOMEM);
88 frame->data[plane] = frame->buf[plane]->data;
89 frame->linesize[plane] = pic->widths[plane];
91 for (line = 0; line < pic->lines[plane]; ++line)
92 memcpy(frame->data[plane] + line * size_line,
93 pic->planes[plane] + line * pic->strides[plane],
94 pic->widths[plane] * bytes_per_sample);
97 frame->width = cad->headerset.width;
98 frame->height = cad->headerset.height;
99 frame->pts = cad->out_frame.pts;
100 frame->pict_type = pic->type;
101 frame->format = avctx->pix_fmt;
106 static av_cold int davs2_end(AVCodecContext *avctx)
108 DAVS2Context *cad = avctx->priv_data;
110 /* close the decoder */
112 davs2_decoder_close(cad->decoder);
119 static int davs2_decode_frame(AVCodecContext *avctx, void *data,
120 int *got_frame, AVPacket *avpkt)
122 DAVS2Context *cad = avctx->priv_data;
123 int buf_size = avpkt->size;
124 uint8_t *buf_ptr = avpkt->data;
125 AVFrame *frame = data;
126 int ret = DAVS2_DEFAULT;
132 cad->packet.data = buf_ptr;
133 cad->packet.len = buf_size;
134 cad->packet.pts = avpkt->pts;
135 cad->packet.dts = avpkt->dts;
137 ret = davs2_decoder_send_packet(cad->decoder, &cad->packet);
140 if (ret == DAVS2_ERROR) {
141 av_log(avctx, AV_LOG_ERROR, "Decoder error: can't read packet\n");
142 return AVERROR_EXTERNAL;
145 ret = davs2_decoder_recv_frame(cad->decoder, &cad->headerset, &cad->out_frame);
147 if (ret != DAVS2_DEFAULT) {
148 *got_frame = davs2_dump_frames(avctx, &cad->out_frame, &cad->headerset, ret, frame);
149 davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
155 AVCodec ff_libdavs2_decoder = {
157 .long_name = NULL_IF_CONFIG_SMALL("libdavs2 AVS2-P2/IEEE1857.4"),
158 .type = AVMEDIA_TYPE_VIDEO,
159 .id = AV_CODEC_ID_AVS2,
160 .priv_data_size = sizeof(DAVS2Context),
163 .decode = davs2_decode_frame,
164 .capabilities = AV_CODEC_CAP_DELAY,//AV_CODEC_CAP_DR1 |
165 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
167 .wrapper_name = "libdavs2",