2 * AVS3-P2/IEEE1857.10 video decoder (using the uavs3d library)
3 * Copyright (c) 2020 Zhenyu Wang <wangzhenyu@pkusz.edu.cn>
4 * Bingjie Han <hanbj@pkusz.edu.cn>
5 * Huiwen Ren <hwrenx@gmail.com>
7 * This file is part of FFmpeg.
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/avutil.h"
25 #include "libavutil/common.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/imgutils.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/opt.h"
32 #include "codec_internal.h"
36 typedef struct uavs3d_context {
37 AVCodecContext *avctx;
41 uavs3d_io_frm_t dec_frame;
44 #define UAVS3D_CHECK_START_CODE(data_ptr, PIC_START_CODE) \
45 (AV_RL32(data_ptr) != (PIC_START_CODE << 24) + AVS3_NAL_START_CODE)
46 static int uavs3d_find_next_start_code(const unsigned char *bs_data, int bs_len, int *left)
48 const unsigned char *data_ptr = bs_data + 4;
49 int count = bs_len - 4;
52 UAVS3D_CHECK_START_CODE(data_ptr, AVS3_INTER_PIC_START_CODE) &&
53 UAVS3D_CHECK_START_CODE(data_ptr, AVS3_INTRA_PIC_START_CODE) &&
54 UAVS3D_CHECK_START_CODE(data_ptr, AVS3_SEQ_START_CODE) &&
55 UAVS3D_CHECK_START_CODE(data_ptr, AVS3_FIRST_SLICE_START_CODE) &&
56 UAVS3D_CHECK_START_CODE(data_ptr, AVS3_SEQ_END_CODE)) {
69 static void uavs3d_output_callback(uavs3d_io_frm_t *dec_frame) {
70 uavs3d_io_frm_t frm_out;
71 AVFrame *frm = (AVFrame *)dec_frame->priv;
74 if (!frm || !frm->data[0]) {
75 dec_frame->got_pic = 0;
76 av_log(NULL, AV_LOG_ERROR, "Invalid AVFrame in uavs3d output.\n");
80 frm->pts = dec_frame->pts;
81 frm->pkt_dts = dec_frame->dts;
83 FF_DISABLE_DEPRECATION_WARNINGS
84 frm->pkt_pos = dec_frame->pkt_pos;
85 frm->pkt_size = dec_frame->pkt_size;
86 FF_ENABLE_DEPRECATION_WARNINGS
88 #if FF_API_FRAME_PICTURE_NUMBER
89 FF_DISABLE_DEPRECATION_WARNINGS
90 frm->coded_picture_number = dec_frame->dtr;
91 frm->display_picture_number = dec_frame->ptr;
92 FF_ENABLE_DEPRECATION_WARNINGS
95 if (dec_frame->type < 0 || dec_frame->type >= FF_ARRAY_ELEMS(ff_avs3_image_type)) {
96 av_log(NULL, AV_LOG_WARNING, "Error frame type in uavs3d: %d.\n", dec_frame->type);
98 frm->pict_type = ff_avs3_image_type[dec_frame->type];
99 if (frm->pict_type == AV_PICTURE_TYPE_I)
100 frm->flags |= AV_FRAME_FLAG_KEY;
102 frm->flags &= ~AV_FRAME_FLAG_KEY;
105 for (i = 0; i < 3; i++) {
106 frm_out.width [i] = dec_frame->width[i];
107 frm_out.height[i] = dec_frame->height[i];
108 frm_out.stride[i] = frm->linesize[i];
109 frm_out.buffer[i] = frm->data[i];
112 uavs3d_img_cpy_cvt(&frm_out, dec_frame, dec_frame->bit_depth);
115 static av_cold int libuavs3d_init(AVCodecContext *avctx)
117 uavs3d_context *h = avctx->priv_data;
120 cdsc.frm_threads = avctx->thread_count > 0 ? avctx->thread_count : av_cpu_count();
122 h->dec_handle = uavs3d_create(&cdsc, uavs3d_output_callback, NULL);
125 if (!h->dec_handle) {
126 return AVERROR(ENOMEM);
132 static av_cold int libuavs3d_end(AVCodecContext *avctx)
134 uavs3d_context *h = avctx->priv_data;
137 uavs3d_flush(h->dec_handle, NULL);
138 uavs3d_delete(h->dec_handle);
139 h->dec_handle = NULL;
146 static void libuavs3d_flush(AVCodecContext * avctx)
148 uavs3d_context *h = avctx->priv_data;
151 uavs3d_reset(h->dec_handle);
155 #define UAVS3D_CHECK_INVALID_RANGE(v, l, r) ((v)<(l)||(v)>(r))
156 static int libuavs3d_decode_frame(AVCodecContext *avctx, AVFrame *frm,
157 int *got_frame, AVPacket *avpkt)
159 uavs3d_context *h = avctx->priv_data;
160 const uint8_t *buf = avpkt->data;
161 int buf_size = avpkt->size;
162 const uint8_t *buf_end;
163 const uint8_t *buf_ptr = buf;
169 frm->pict_type = AV_PICTURE_TYPE_NONE;
173 if (!frm->data[0] && (ret = ff_get_buffer(avctx, frm, 0)) < 0) {
176 h->dec_frame.priv = frm; // AVFrame
179 ret = uavs3d_flush(h->dec_handle, &h->dec_frame);
180 } while (ret > 0 && !h->dec_frame.got_pic);
182 uavs3d_io_frm_t *frm_dec = &h->dec_frame;
184 buf_end = buf + buf_size;
186 FF_DISABLE_DEPRECATION_WARNINGS
187 frm_dec->pkt_pos = avpkt->pos;
188 frm_dec->pkt_size = avpkt->size;
189 FF_ENABLE_DEPRECATION_WARNINGS
196 if (!frm->data[0] && (ret = ff_get_buffer(avctx, frm, 0)) < 0) {
199 h->dec_frame.priv = frm; // AVFrame
202 if (uavs3d_find_next_start_code(buf_ptr, buf_end - buf_ptr, &left_bytes)) {
203 bs_len = buf_end - buf_ptr - left_bytes;
205 bs_len = buf_end - buf_ptr;
208 frm_dec->bs = (unsigned char *)buf_ptr;
209 frm_dec->bs_len = bs_len;
210 frm_dec->pts = avpkt->pts;
211 frm_dec->dts = avpkt->dts;
212 uavs3d_decode(h->dec_handle, frm_dec);
215 if (frm_dec->nal_type == NAL_SEQ_HEADER) {
216 struct uavs3d_com_seqh_t *seqh = frm_dec->seqhdr;
217 if (UAVS3D_CHECK_INVALID_RANGE(seqh->frame_rate_code, 0, 15)) {
218 av_log(avctx, AV_LOG_ERROR, "Invalid frame rate code: %d.\n", seqh->frame_rate_code);
219 seqh->frame_rate_code = 3; // default 25 fps
221 avctx->framerate.num = ff_avs3_frame_rate_tab[seqh->frame_rate_code].num;
222 avctx->framerate.den = ff_avs3_frame_rate_tab[seqh->frame_rate_code].den;
224 avctx->has_b_frames = seqh->output_reorder_delay;
225 avctx->pix_fmt = seqh->bit_depth_internal == 8 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUV420P10LE;
226 ret = ff_set_dimensions(avctx, seqh->horizontal_size, seqh->vertical_size);
231 if (seqh->colour_description) {
232 if (UAVS3D_CHECK_INVALID_RANGE(seqh->colour_primaries, 0, 9) ||
233 UAVS3D_CHECK_INVALID_RANGE(seqh->transfer_characteristics, 0, 14) ||
234 UAVS3D_CHECK_INVALID_RANGE(seqh->matrix_coefficients, 0, 11)) {
235 av_log(avctx, AV_LOG_ERROR,
236 "Invalid colour description: primaries: %d"
237 "transfer characteristics: %d"
238 "matrix coefficients: %d.\n",
239 seqh->colour_primaries,
240 seqh->transfer_characteristics,
241 seqh->matrix_coefficients);
243 avctx->color_primaries = ff_avs3_color_primaries_tab[seqh->colour_primaries];
244 avctx->color_trc = ff_avs3_color_transfer_tab [seqh->transfer_characteristics];
245 avctx->colorspace = ff_avs3_color_matrix_tab [seqh->matrix_coefficients];
249 if (frm_dec->got_pic) {
255 *got_frame = h->dec_frame.got_pic;
261 return buf_ptr - buf;
264 const FFCodec ff_libuavs3d_decoder = {
265 .p.name = "libuavs3d",
266 CODEC_LONG_NAME("libuavs3d AVS3-P2/IEEE1857.10"),
267 .p.type = AVMEDIA_TYPE_VIDEO,
268 .p.id = AV_CODEC_ID_AVS3,
269 .priv_data_size = sizeof(uavs3d_context),
270 .init = libuavs3d_init,
271 .close = libuavs3d_end,
272 FF_CODEC_DECODE_CB(libuavs3d_decode_frame),
273 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
274 .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE |
275 FF_CODEC_CAP_AUTO_THREADS,
276 .flush = libuavs3d_flush,
277 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
278 AV_PIX_FMT_YUV420P10LE,
280 .p.wrapper_name = "libuavs3d",