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| 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) |
| 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 | + |
| 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 | + |
| 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 | + |
| 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 | + |
| 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)) |
| 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_AUTO_THREADS, |
| 257 | + .flush = libuavs3d_flush, |
| 258 | + .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, |
| 259 | + AV_PIX_FMT_YUV420P10LE, |
| 260 | + AV_PIX_FMT_NONE }, |
| 261 | + .wrapper_name = "libuavs3d", |
| 262 | +}; |