| /* |
| * AVS3-P2/IEEE1857.10 video decoder (using the uavs3d library) |
| * Copyright (c) 2020 Zhenyu Wang <wangzhenyu@pkusz.edu.cn> |
| * Bingjie Han <hanbj@pkusz.edu.cn> |
| * Huiwen Ren <hwrenx@gmail.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/avutil.h" |
| #include "libavutil/common.h" |
| #include "libavutil/cpu.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/opt.h" |
| #include "avcodec.h" |
| #include "avs3.h" |
| #include "codec_internal.h" |
| #include "decode.h" |
| #include "uavs3d.h" |
| |
| typedef struct uavs3d_context { |
| AVCodecContext *avctx; |
| void *dec_handle; |
| int frame_threads; |
| int got_seqhdr; |
| uavs3d_io_frm_t dec_frame; |
| } uavs3d_context; |
| |
| #define UAVS3D_CHECK_START_CODE(data_ptr, PIC_START_CODE) \ |
| (AV_RL32(data_ptr) != (PIC_START_CODE << 24) + AVS3_NAL_START_CODE) |
| static int uavs3d_find_next_start_code(const unsigned char *bs_data, int bs_len, int *left) |
| { |
| const unsigned char *data_ptr = bs_data + 4; |
| int count = bs_len - 4; |
| |
| while (count >= 4 && |
| UAVS3D_CHECK_START_CODE(data_ptr, AVS3_INTER_PIC_START_CODE) && |
| UAVS3D_CHECK_START_CODE(data_ptr, AVS3_INTRA_PIC_START_CODE) && |
| UAVS3D_CHECK_START_CODE(data_ptr, AVS3_SEQ_START_CODE) && |
| UAVS3D_CHECK_START_CODE(data_ptr, AVS3_FIRST_SLICE_START_CODE) && |
| UAVS3D_CHECK_START_CODE(data_ptr, AVS3_SEQ_END_CODE)) { |
| data_ptr++; |
| count--; |
| } |
| |
| if (count >= 4) { |
| *left = count; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static void uavs3d_output_callback(uavs3d_io_frm_t *dec_frame) { |
| uavs3d_io_frm_t frm_out; |
| AVFrame *frm = (AVFrame *)dec_frame->priv; |
| int i; |
| |
| if (!frm || !frm->data[0]) { |
| dec_frame->got_pic = 0; |
| av_log(NULL, AV_LOG_ERROR, "Invalid AVFrame in uavs3d output.\n"); |
| return; |
| } |
| |
| frm->pts = dec_frame->pts; |
| frm->pkt_dts = dec_frame->dts; |
| #if FF_API_FRAME_PKT |
| FF_DISABLE_DEPRECATION_WARNINGS |
| frm->pkt_pos = dec_frame->pkt_pos; |
| frm->pkt_size = dec_frame->pkt_size; |
| FF_ENABLE_DEPRECATION_WARNINGS |
| #endif |
| |
| if (dec_frame->type < 0 || dec_frame->type >= FF_ARRAY_ELEMS(ff_avs3_image_type)) { |
| av_log(NULL, AV_LOG_WARNING, "Error frame type in uavs3d: %d.\n", dec_frame->type); |
| } else { |
| frm->pict_type = ff_avs3_image_type[dec_frame->type]; |
| if (frm->pict_type == AV_PICTURE_TYPE_I) |
| frm->flags |= AV_FRAME_FLAG_KEY; |
| else |
| frm->flags &= ~AV_FRAME_FLAG_KEY; |
| } |
| |
| for (i = 0; i < 3; i++) { |
| frm_out.width [i] = dec_frame->width[i]; |
| frm_out.height[i] = dec_frame->height[i]; |
| frm_out.stride[i] = frm->linesize[i]; |
| frm_out.buffer[i] = frm->data[i]; |
| } |
| |
| uavs3d_img_cpy_cvt(&frm_out, dec_frame, dec_frame->bit_depth); |
| } |
| |
| static av_cold int libuavs3d_init(AVCodecContext *avctx) |
| { |
| uavs3d_context *h = avctx->priv_data; |
| uavs3d_cfg_t cdsc; |
| |
| cdsc.frm_threads = avctx->thread_count > 0 ? avctx->thread_count : av_cpu_count(); |
| cdsc.check_md5 = 0; |
| h->dec_handle = uavs3d_create(&cdsc, uavs3d_output_callback, NULL); |
| h->got_seqhdr = 0; |
| |
| if (!h->dec_handle) { |
| return AVERROR(ENOMEM); |
| } |
| |
| return 0; |
| } |
| |
| static av_cold int libuavs3d_end(AVCodecContext *avctx) |
| { |
| uavs3d_context *h = avctx->priv_data; |
| |
| if (h->dec_handle) { |
| uavs3d_flush(h->dec_handle, NULL); |
| uavs3d_delete(h->dec_handle); |
| h->dec_handle = NULL; |
| } |
| h->got_seqhdr = 0; |
| |
| return 0; |
| } |
| |
| static void libuavs3d_flush(AVCodecContext * avctx) |
| { |
| uavs3d_context *h = avctx->priv_data; |
| |
| if (h->dec_handle) { |
| uavs3d_reset(h->dec_handle); |
| } |
| } |
| |
| #define UAVS3D_CHECK_INVALID_RANGE(v, l, r) ((v)<(l)||(v)>(r)) |
| static int libuavs3d_decode_frame(AVCodecContext *avctx, AVFrame *frm, |
| int *got_frame, AVPacket *avpkt) |
| { |
| uavs3d_context *h = avctx->priv_data; |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| const uint8_t *buf_end; |
| const uint8_t *buf_ptr = buf; |
| int left_bytes; |
| int ret, finish = 0; |
| |
| *got_frame = 0; |
| frm->pts = -1; |
| frm->pict_type = AV_PICTURE_TYPE_NONE; |
| |
| if (!buf_size) { |
| if (h->got_seqhdr) { |
| if (!frm->data[0] && (ret = ff_get_buffer(avctx, frm, 0)) < 0) { |
| return ret; |
| } |
| h->dec_frame.priv = frm; // AVFrame |
| } |
| do { |
| ret = uavs3d_flush(h->dec_handle, &h->dec_frame); |
| } while (ret > 0 && !h->dec_frame.got_pic); |
| } else { |
| uavs3d_io_frm_t *frm_dec = &h->dec_frame; |
| |
| buf_end = buf + buf_size; |
| #if FF_API_FRAME_PKT |
| FF_DISABLE_DEPRECATION_WARNINGS |
| frm_dec->pkt_pos = avpkt->pos; |
| frm_dec->pkt_size = avpkt->size; |
| FF_ENABLE_DEPRECATION_WARNINGS |
| #endif |
| |
| while (!finish) { |
| int bs_len; |
| |
| if (h->got_seqhdr) { |
| if (!frm->data[0] && (ret = ff_get_buffer(avctx, frm, 0)) < 0) { |
| return ret; |
| } |
| h->dec_frame.priv = frm; // AVFrame |
| } |
| |
| if (uavs3d_find_next_start_code(buf_ptr, buf_end - buf_ptr, &left_bytes)) { |
| bs_len = buf_end - buf_ptr - left_bytes; |
| } else { |
| bs_len = buf_end - buf_ptr; |
| finish = 1; |
| } |
| frm_dec->bs = (unsigned char *)buf_ptr; |
| frm_dec->bs_len = bs_len; |
| frm_dec->pts = avpkt->pts; |
| frm_dec->dts = avpkt->dts; |
| uavs3d_decode(h->dec_handle, frm_dec); |
| buf_ptr += bs_len; |
| |
| if (frm_dec->nal_type == NAL_SEQ_HEADER) { |
| struct uavs3d_com_seqh_t *seqh = frm_dec->seqhdr; |
| if (UAVS3D_CHECK_INVALID_RANGE(seqh->frame_rate_code, 0, 15)) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid frame rate code: %d.\n", seqh->frame_rate_code); |
| seqh->frame_rate_code = 3; // default 25 fps |
| } else { |
| avctx->framerate.num = ff_avs3_frame_rate_tab[seqh->frame_rate_code].num; |
| avctx->framerate.den = ff_avs3_frame_rate_tab[seqh->frame_rate_code].den; |
| } |
| avctx->has_b_frames = seqh->output_reorder_delay; |
| avctx->pix_fmt = seqh->bit_depth_internal == 8 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUV420P10LE; |
| ret = ff_set_dimensions(avctx, seqh->horizontal_size, seqh->vertical_size); |
| if (ret < 0) |
| return ret; |
| h->got_seqhdr = 1; |
| |
| if (seqh->colour_description) { |
| if (UAVS3D_CHECK_INVALID_RANGE(seqh->colour_primaries, 0, 9) || |
| UAVS3D_CHECK_INVALID_RANGE(seqh->transfer_characteristics, 0, 14) || |
| UAVS3D_CHECK_INVALID_RANGE(seqh->matrix_coefficients, 0, 11)) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Invalid colour description: primaries: %d" |
| "transfer characteristics: %d" |
| "matrix coefficients: %d.\n", |
| seqh->colour_primaries, |
| seqh->transfer_characteristics, |
| seqh->matrix_coefficients); |
| } else { |
| avctx->color_primaries = ff_avs3_color_primaries_tab[seqh->colour_primaries]; |
| avctx->color_trc = ff_avs3_color_transfer_tab [seqh->transfer_characteristics]; |
| avctx->colorspace = ff_avs3_color_matrix_tab [seqh->matrix_coefficients]; |
| } |
| } |
| } |
| if (frm_dec->got_pic) { |
| break; |
| } |
| } |
| } |
| |
| *got_frame = h->dec_frame.got_pic; |
| |
| if (!(*got_frame)) { |
| av_frame_unref(frm); |
| } |
| |
| return buf_ptr - buf; |
| } |
| |
| const FFCodec ff_libuavs3d_decoder = { |
| .p.name = "libuavs3d", |
| CODEC_LONG_NAME("libuavs3d AVS3-P2/IEEE1857.10"), |
| .p.type = AVMEDIA_TYPE_VIDEO, |
| .p.id = AV_CODEC_ID_AVS3, |
| .priv_data_size = sizeof(uavs3d_context), |
| .init = libuavs3d_init, |
| .close = libuavs3d_end, |
| FF_CODEC_DECODE_CB(libuavs3d_decode_frame), |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS, |
| .caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE | |
| FF_CODEC_CAP_AUTO_THREADS, |
| .flush = libuavs3d_flush, |
| .p.wrapper_name = "libuavs3d", |
| }; |
