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;
43 int cpu_flags = av_get_cpu_flags();
45 /* init the decoder */
46 cad->param.threads = avctx->thread_count;
47 cad->param.info_level = 0;
48 cad->param.disable_avx = !(cpu_flags & AV_CPU_FLAG_AVX &&
49 cpu_flags & AV_CPU_FLAG_AVX2);
50 cad->decoder = davs2_decoder_open(&cad->param);
53 av_log(avctx, AV_LOG_ERROR, "decoder created error.");
54 return AVERROR_EXTERNAL;
57 av_log(avctx, AV_LOG_VERBOSE, "decoder created. %p\n", cad->decoder);
61 static int davs2_dump_frames(AVCodecContext *avctx, davs2_picture_t *pic, int *got_frame,
62 davs2_seq_info_t *headerset, int ret_type, AVFrame *frame)
64 DAVS2Context *cad = avctx->priv_data;
65 int bytes_per_sample = pic->bytes_per_sample;
74 if (!pic || ret_type == DAVS2_GOT_HEADER) {
75 avctx->width = headerset->width;
76 avctx->height = headerset->height;
77 avctx->pix_fmt = headerset->output_bit_depth == 10 ?
78 AV_PIX_FMT_YUV420P10 : AV_PIX_FMT_YUV420P;
80 avctx->framerate = av_d2q(headerset->frame_rate,4096);
88 frame->pict_type = AV_PICTURE_TYPE_I;
92 frame->pict_type = AV_PICTURE_TYPE_P;
95 frame->pict_type = AV_PICTURE_TYPE_B;
98 frame->pict_type = AV_PICTURE_TYPE_S;
101 av_log(avctx, AV_LOG_ERROR, "Decoder error: unknown frame type\n");
102 return AVERROR_EXTERNAL;
105 for (plane = 0; plane < 3; ++plane) {
106 int size_line = pic->widths[plane] * bytes_per_sample;
107 frame->buf[plane] = av_buffer_alloc(size_line * pic->lines[plane]);
109 if (!frame->buf[plane]){
110 av_log(avctx, AV_LOG_ERROR, "dump error: alloc failed.\n");
111 return AVERROR(ENOMEM);
114 frame->data[plane] = frame->buf[plane]->data;
115 frame->linesize[plane] = size_line;
117 for (line = 0; line < pic->lines[plane]; ++line)
118 memcpy(frame->data[plane] + line * size_line,
119 pic->planes[plane] + line * pic->strides[plane],
120 pic->widths[plane] * bytes_per_sample);
123 frame->width = cad->headerset.width;
124 frame->height = cad->headerset.height;
125 frame->pts = cad->out_frame.pts;
126 frame->format = avctx->pix_fmt;
132 static int send_delayed_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
134 DAVS2Context *cad = avctx->priv_data;
135 int ret = DAVS2_DEFAULT;
137 ret = davs2_decoder_flush(cad->decoder, &cad->headerset, &cad->out_frame);
138 if (ret == DAVS2_ERROR) {
139 av_log(avctx, AV_LOG_ERROR, "Decoder error: can't flush delayed frame\n");
140 return AVERROR_EXTERNAL;
142 if (ret == DAVS2_GOT_FRAME) {
143 ret = davs2_dump_frames(avctx, &cad->out_frame, got_frame, &cad->headerset, ret, frame);
144 davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
149 static av_cold int davs2_end(AVCodecContext *avctx)
151 DAVS2Context *cad = avctx->priv_data;
153 /* close the decoder */
155 davs2_decoder_close(cad->decoder);
162 static int davs2_decode_frame(AVCodecContext *avctx, void *data,
163 int *got_frame, AVPacket *avpkt)
165 DAVS2Context *cad = avctx->priv_data;
166 int buf_size = avpkt->size;
167 uint8_t *buf_ptr = avpkt->data;
168 AVFrame *frame = data;
169 int ret = DAVS2_DEFAULT;
171 /* end of stream, output what is still in the buffers */
173 return send_delayed_frame(avctx, frame, got_frame);
176 cad->packet.data = buf_ptr;
177 cad->packet.len = buf_size;
178 cad->packet.pts = avpkt->pts;
179 cad->packet.dts = avpkt->dts;
181 ret = davs2_decoder_send_packet(cad->decoder, &cad->packet);
184 if (ret == DAVS2_ERROR) {
185 av_log(avctx, AV_LOG_ERROR, "Decoder error: can't read packet\n");
186 return AVERROR_EXTERNAL;
189 ret = davs2_decoder_recv_frame(cad->decoder, &cad->headerset, &cad->out_frame);
191 if (ret != DAVS2_DEFAULT) {
192 ret = davs2_dump_frames(avctx, &cad->out_frame, got_frame, &cad->headerset, ret, frame);
193 davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
196 return ret == 0 ? buf_size : ret;
199 AVCodec ff_libdavs2_decoder = {
201 .long_name = NULL_IF_CONFIG_SMALL("libdavs2 AVS2-P2/IEEE1857.4"),
202 .type = AVMEDIA_TYPE_VIDEO,
203 .id = AV_CODEC_ID_AVS2,
204 .priv_data_size = sizeof(DAVS2Context),
207 .decode = davs2_decode_frame,
208 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
209 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
211 .wrapper_name = "libdavs2",