1 /*
2 * RAW AVS3-P2/IEEE1857.10 video demuxer
3 * Copyright (c) 2020 Zhenyu Wang <wangzhenyu@pkusz.edu.cn>
4 * Bingjie Han <hanbj@pkusz.edu.cn>
5 * Huiwen Ren <hwrenx@gmail.com>
6 *
7 * This file is part of FFmpeg.
8 *
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.
13 *
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.
18 *
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
22 */
23
24 #include "libavutil/avassert.h"
25 #include "libavutil/avutil.h"
26 #include "libavutil/common.h"
27 #include "libavutil/imgutils.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/opt.h"
30 #include "avcodec.h"
31 #include "avs3.h"
32 #include "internal.h"
33 #include "uavs3d.h"
34
35 typedef struct uavs3d_context {
36 AVCodecContext *avctx;
37 void *dec_handle;
38 int frame_threads;
39 int got_seqhdr;
40 uavs3d_io_frm_t dec_frame;
41 } uavs3d_context;
42
43 #define UAVS3D_CHECK_START_CODE(data_ptr, PIC_START_CODE) \
44 (AV_RL32(data_ptr) != (PIC_START_CODE << 24) + AVS3_NAL_START_CODE)
uavs3d_find_next_start_code(const unsigned char * bs_data,int bs_len,int * left)45 static int uavs3d_find_next_start_code(const unsigned char *bs_data, int bs_len, int *left)
46 {
47 const unsigned char *data_ptr = bs_data + 4;
48 int count = bs_len - 4;
49
50 while (count >= 4 &&
51 UAVS3D_CHECK_START_CODE(data_ptr, AVS3_INTER_PIC_START_CODE) &&
52 UAVS3D_CHECK_START_CODE(data_ptr, AVS3_INTRA_PIC_START_CODE) &&
53 UAVS3D_CHECK_START_CODE(data_ptr, AVS3_SEQ_START_CODE) &&
54 UAVS3D_CHECK_START_CODE(data_ptr, AVS3_FIRST_SLICE_START_CODE) &&
55 UAVS3D_CHECK_START_CODE(data_ptr, AVS3_SEQ_END_CODE)) {
56 data_ptr++;
57 count--;
58 }
59
60 if (count >= 4) {
61 *left = count;
62 return 1;
63 }
64
65 return 0;
66 }
67
uavs3d_output_callback(uavs3d_io_frm_t * dec_frame)68 static void uavs3d_output_callback(uavs3d_io_frm_t *dec_frame) {
69 uavs3d_io_frm_t frm_out;
70 AVFrame *frm = (AVFrame *)dec_frame->priv;
71 int i;
72
73 if (!frm || !frm->data[0]) {
74 dec_frame->got_pic = 0;
75 av_log(NULL, AV_LOG_ERROR, "Invalid AVFrame in uavs3d output.\n");
76 return;
77 }
78
79 frm->pts = dec_frame->pts;
80 frm->pkt_dts = dec_frame->dts;
81 frm->pkt_pos = dec_frame->pkt_pos;
82 frm->pkt_size = dec_frame->pkt_size;
83 frm->coded_picture_number = dec_frame->dtr;
84 frm->display_picture_number = dec_frame->ptr;
85
86 if (dec_frame->type < 0 || dec_frame->type >= 4) {
87 av_log(NULL, AV_LOG_WARNING, "Error frame type in uavs3d: %d.\n", dec_frame->type);
88 }
89
90 frm->pict_type = ff_avs3_image_type[dec_frame->type];
91 frm->key_frame = (frm->pict_type == AV_PICTURE_TYPE_I);
92
93 for (i = 0; i < 3; i++) {
94 frm_out.width [i] = dec_frame->width[i];
95 frm_out.height[i] = dec_frame->height[i];
96 frm_out.stride[i] = frm->linesize[i];
97 frm_out.buffer[i] = frm->data[i];
98 }
99
100 uavs3d_img_cpy_cvt(&frm_out, dec_frame, dec_frame->bit_depth);
101 }
102
libuavs3d_init(AVCodecContext * avctx)103 static av_cold int libuavs3d_init(AVCodecContext *avctx)
104 {
105 uavs3d_context *h = avctx->priv_data;
106 uavs3d_cfg_t cdsc;
107
108 cdsc.frm_threads = avctx->thread_count > 0 ? avctx->thread_count : av_cpu_count();
109 cdsc.check_md5 = 0;
110 h->dec_handle = uavs3d_create(&cdsc, uavs3d_output_callback, NULL);
111 h->got_seqhdr = 0;
112
113 if (!h->dec_handle) {
114 return AVERROR(ENOMEM);
115 }
116
117 return 0;
118 }
119
libuavs3d_end(AVCodecContext * avctx)120 static av_cold int libuavs3d_end(AVCodecContext *avctx)
121 {
122 uavs3d_context *h = avctx->priv_data;
123
124 if (h->dec_handle) {
125 uavs3d_flush(h->dec_handle, NULL);
126 uavs3d_delete(h->dec_handle);
127 h->dec_handle = NULL;
128 }
129 h->got_seqhdr = 0;
130
131 return 0;
132 }
133
libuavs3d_flush(AVCodecContext * avctx)134 static void libuavs3d_flush(AVCodecContext * avctx)
135 {
136 uavs3d_context *h = avctx->priv_data;
137
138 if (h->dec_handle) {
139 uavs3d_reset(h->dec_handle);
140 }
141 }
142
143 #define UAVS3D_CHECK_INVALID_RANGE(v, l, r) ((v)<(l)||(v)>(r))
libuavs3d_decode_frame(AVCodecContext * avctx,void * data,int * got_frame,AVPacket * avpkt)144 static int libuavs3d_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
145 {
146 uavs3d_context *h = avctx->priv_data;
147 const uint8_t *buf = avpkt->data;
148 int buf_size = avpkt->size;
149 const uint8_t *buf_end;
150 const uint8_t *buf_ptr;
151 AVFrame *frm = data;
152 int left_bytes;
153 int ret, finish = 0;
154
155 *got_frame = 0;
156 frm->pts = -1;
157 frm->pict_type = AV_PICTURE_TYPE_NONE;
158
159 if (!buf_size) {
160 if (h->got_seqhdr) {
161 if (!frm->data[0] && (ret = ff_get_buffer(avctx, frm, 0)) < 0) {
162 return ret;
163 }
164 h->dec_frame.priv = data; // AVFrame
165 }
166 do {
167 ret = uavs3d_flush(h->dec_handle, &h->dec_frame);
168 } while (ret > 0 && !h->dec_frame.got_pic);
169 } else {
170 uavs3d_io_frm_t *frm_dec = &h->dec_frame;
171
172 buf_ptr = buf;
173 buf_end = buf + buf_size;
174 frm_dec->pkt_pos = avpkt->pos;
175 frm_dec->pkt_size = avpkt->size;
176
177 while (!finish) {
178 int bs_len;
179
180 if (h->got_seqhdr) {
181 if (!frm->data[0] && (ret = ff_get_buffer(avctx, frm, 0)) < 0) {
182 return ret;
183 }
184 h->dec_frame.priv = data; // AVFrame
185 }
186
187 if (uavs3d_find_next_start_code(buf_ptr, buf_end - buf_ptr, &left_bytes)) {
188 bs_len = buf_end - buf_ptr - left_bytes;
189 } else {
190 bs_len = buf_end - buf_ptr;
191 finish = 1;
192 }
193 frm_dec->bs = (unsigned char *)buf_ptr;
194 frm_dec->bs_len = bs_len;
195 frm_dec->pts = avpkt->pts;
196 frm_dec->dts = avpkt->dts;
197 uavs3d_decode(h->dec_handle, frm_dec);
198 buf_ptr += bs_len;
199
200 if (frm_dec->nal_type == NAL_SEQ_HEADER) {
201 struct uavs3d_com_seqh_t *seqh = frm_dec->seqhdr;
202 if (UAVS3D_CHECK_INVALID_RANGE(seqh->frame_rate_code, 0, 15)) {
203 av_log(avctx, AV_LOG_ERROR, "Invalid frame rate code: %d.\n", seqh->frame_rate_code);
204 seqh->frame_rate_code = 3; // default 25 fps
205 } else {
206 avctx->framerate.num = ff_avs3_frame_rate_tab[seqh->frame_rate_code].num;
207 avctx->framerate.den = ff_avs3_frame_rate_tab[seqh->frame_rate_code].den;
208 }
209 avctx->has_b_frames = !seqh->low_delay;
210 avctx->pix_fmt = seqh->bit_depth_internal == 8 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUV420P10LE;
211 ff_set_dimensions(avctx, seqh->horizontal_size, seqh->vertical_size);
212 h->got_seqhdr = 1;
213
214 if (seqh->colour_description) {
215 if (UAVS3D_CHECK_INVALID_RANGE(seqh->colour_primaries, 0, 9) ||
216 UAVS3D_CHECK_INVALID_RANGE(seqh->transfer_characteristics, 0, 14) ||
217 UAVS3D_CHECK_INVALID_RANGE(seqh->matrix_coefficients, 0, 11)) {
218 av_log(avctx, AV_LOG_ERROR,
219 "Invalid colour description: primaries: %d"
220 "transfer characteristics: %d"
221 "matrix coefficients: %d.\n",
222 seqh->colour_primaries,
223 seqh->transfer_characteristics,
224 seqh->matrix_coefficients);
225 } else {
226 avctx->color_primaries = ff_avs3_color_primaries_tab[seqh->colour_primaries];
227 avctx->color_trc = ff_avs3_color_transfer_tab [seqh->transfer_characteristics];
228 avctx->colorspace = ff_avs3_color_matrix_tab [seqh->matrix_coefficients];
229 }
230 }
231 }
232 if (frm_dec->got_pic) {
233 break;
234 }
235 }
236 }
237
238 *got_frame = h->dec_frame.got_pic;
239
240 if (!(*got_frame)) {
241 av_frame_unref(frm);
242 }
243
244 return buf_ptr - buf;
245 }
246
247 AVCodec ff_libuavs3d_decoder = {
248 .name = "libuavs3d",
249 .long_name = NULL_IF_CONFIG_SMALL("libuavs3d AVS3-P2/IEEE1857.10"),
250 .type = AVMEDIA_TYPE_VIDEO,
251 .id = AV_CODEC_ID_AVS3,
252 .priv_data_size = sizeof(uavs3d_context),
253 .init = libuavs3d_init,
254 .close = libuavs3d_end,
255 .decode = libuavs3d_decode_frame,
256 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
257 .caps_internal = FF_CODEC_CAP_AUTO_THREADS,
258 .flush = libuavs3d_flush,
259 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
260 AV_PIX_FMT_YUV420P10LE,
261 AV_PIX_FMT_NONE },
262 .wrapper_name = "libuavs3d",
263 };
264