diff options
author | hwren <hwrenx@126.com> | 2020-10-05 20:16:25 +0800 |
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committer | hwren <hwrenx@126.com> | 2020-10-06 00:01:33 +0800 |
commit | c952db9d68d31d1eca5ac770cc53bf35b885b087 (patch) | |
tree | 931ad810168b39cfad863be4805c16e596919060 /libavcodec/libuavs3d.c | |
parent | ff74ad2a4b51bda9f6ec92fffa09228c408eaa0b (diff) |
lavc,doc: add libuavs3d video decoder wrapper
Signed-off-by: hbj <hanbj@pku.edu.cn>
Signed-off-by: hwren <hwrenx@126.com>
Diffstat (limited to 'libavcodec/libuavs3d.c')
-rw-r--r-- | libavcodec/libuavs3d.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/libavcodec/libuavs3d.c b/libavcodec/libuavs3d.c new file mode 100644 index 0000000000..d77cc2192d --- /dev/null +++ b/libavcodec/libuavs3d.c @@ -0,0 +1,262 @@ +/* + * RAW AVS3-P2/IEEE1857.10 video demuxer + * 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/avassert.h" +#include "libavutil/avutil.h" +#include "libavutil/common.h" +#include "libavutil/imgutils.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/opt.h" +#include "avcodec.h" +#include "avs3.h" +#include "internal.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; + frm->pkt_pos = dec_frame->pkt_pos; + frm->pkt_size = dec_frame->pkt_size; + frm->coded_picture_number = dec_frame->dtr; + frm->display_picture_number = dec_frame->ptr; + + if (dec_frame->type < 0 || dec_frame->type >= 4) { + av_log(NULL, AV_LOG_WARNING, "Error frame type in uavs3d: %d.\n", dec_frame->type); + } + + frm->pict_type = ff_avs3_image_type[dec_frame->type]; + frm->key_frame = (frm->pict_type == AV_PICTURE_TYPE_I); + + 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, void *data, 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; + AVFrame *frm = data; + 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 = data; // 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_ptr = buf; + buf_end = buf + buf_size; + frm_dec->pkt_pos = avpkt->pos; + frm_dec->pkt_size = avpkt->size; + + 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 = data; // 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->low_delay; + avctx->pix_fmt = seqh->bit_depth_internal == 8 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUV420P10LE; + ff_set_dimensions(avctx, seqh->horizontal_size, seqh->vertical_size); + 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; +} + +AVCodec ff_libuavs3d_decoder = { + .name = "libuavs3d", + .long_name = NULL_IF_CONFIG_SMALL("libuavs3d AVS3-P2/IEEE1857.10"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_AVS3, + .priv_data_size = sizeof(uavs3d_context), + .init = libuavs3d_init, + .close = libuavs3d_end, + .decode = libuavs3d_decode_frame, + .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS, + .flush = libuavs3d_flush, + .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, + AV_PIX_FMT_YUV420P10LE, + AV_PIX_FMT_NONE }, + .wrapper_name = "libuavs3d", +}; |