mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-04 15:28:19 +02:00
264 lines
9.0 KiB
C
264 lines
9.0 KiB
C
/*
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* RAW AVS3-P2/IEEE1857.10 video demuxer
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* Copyright (c) 2020 Zhenyu Wang <wangzhenyu@pkusz.edu.cn>
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* Bingjie Han <hanbj@pkusz.edu.cn>
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* Huiwen Ren <hwrenx@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avutil.h"
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#include "libavutil/common.h"
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#include "libavutil/cpu.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "avs3.h"
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#include "internal.h"
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#include "uavs3d.h"
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typedef struct uavs3d_context {
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AVCodecContext *avctx;
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void *dec_handle;
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int frame_threads;
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int got_seqhdr;
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uavs3d_io_frm_t dec_frame;
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} uavs3d_context;
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#define UAVS3D_CHECK_START_CODE(data_ptr, PIC_START_CODE) \
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(AV_RL32(data_ptr) != (PIC_START_CODE << 24) + AVS3_NAL_START_CODE)
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static int uavs3d_find_next_start_code(const unsigned char *bs_data, int bs_len, int *left)
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{
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const unsigned char *data_ptr = bs_data + 4;
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int count = bs_len - 4;
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while (count >= 4 &&
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UAVS3D_CHECK_START_CODE(data_ptr, AVS3_INTER_PIC_START_CODE) &&
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UAVS3D_CHECK_START_CODE(data_ptr, AVS3_INTRA_PIC_START_CODE) &&
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UAVS3D_CHECK_START_CODE(data_ptr, AVS3_SEQ_START_CODE) &&
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UAVS3D_CHECK_START_CODE(data_ptr, AVS3_FIRST_SLICE_START_CODE) &&
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UAVS3D_CHECK_START_CODE(data_ptr, AVS3_SEQ_END_CODE)) {
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data_ptr++;
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count--;
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}
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if (count >= 4) {
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*left = count;
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return 1;
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}
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return 0;
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}
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static void uavs3d_output_callback(uavs3d_io_frm_t *dec_frame) {
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uavs3d_io_frm_t frm_out;
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AVFrame *frm = (AVFrame *)dec_frame->priv;
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int i;
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if (!frm || !frm->data[0]) {
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dec_frame->got_pic = 0;
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av_log(NULL, AV_LOG_ERROR, "Invalid AVFrame in uavs3d output.\n");
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return;
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}
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frm->pts = dec_frame->pts;
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frm->pkt_dts = dec_frame->dts;
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frm->pkt_pos = dec_frame->pkt_pos;
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frm->pkt_size = dec_frame->pkt_size;
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frm->coded_picture_number = dec_frame->dtr;
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frm->display_picture_number = dec_frame->ptr;
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if (dec_frame->type < 0 || dec_frame->type >= 4) {
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av_log(NULL, AV_LOG_WARNING, "Error frame type in uavs3d: %d.\n", dec_frame->type);
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}
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frm->pict_type = ff_avs3_image_type[dec_frame->type];
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frm->key_frame = (frm->pict_type == AV_PICTURE_TYPE_I);
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for (i = 0; i < 3; i++) {
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frm_out.width [i] = dec_frame->width[i];
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frm_out.height[i] = dec_frame->height[i];
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frm_out.stride[i] = frm->linesize[i];
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frm_out.buffer[i] = frm->data[i];
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}
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uavs3d_img_cpy_cvt(&frm_out, dec_frame, dec_frame->bit_depth);
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}
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static av_cold int libuavs3d_init(AVCodecContext *avctx)
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{
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uavs3d_context *h = avctx->priv_data;
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uavs3d_cfg_t cdsc;
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cdsc.frm_threads = avctx->thread_count > 0 ? avctx->thread_count : av_cpu_count();
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cdsc.check_md5 = 0;
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h->dec_handle = uavs3d_create(&cdsc, uavs3d_output_callback, NULL);
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h->got_seqhdr = 0;
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if (!h->dec_handle) {
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return AVERROR(ENOMEM);
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}
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return 0;
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}
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static av_cold int libuavs3d_end(AVCodecContext *avctx)
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{
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uavs3d_context *h = avctx->priv_data;
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if (h->dec_handle) {
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uavs3d_flush(h->dec_handle, NULL);
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uavs3d_delete(h->dec_handle);
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h->dec_handle = NULL;
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}
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h->got_seqhdr = 0;
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return 0;
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}
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static void libuavs3d_flush(AVCodecContext * avctx)
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{
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uavs3d_context *h = avctx->priv_data;
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if (h->dec_handle) {
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uavs3d_reset(h->dec_handle);
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}
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}
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#define UAVS3D_CHECK_INVALID_RANGE(v, l, r) ((v)<(l)||(v)>(r))
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static int libuavs3d_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
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{
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uavs3d_context *h = avctx->priv_data;
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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const uint8_t *buf_end;
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const uint8_t *buf_ptr;
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AVFrame *frm = data;
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int left_bytes;
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int ret, finish = 0;
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*got_frame = 0;
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frm->pts = -1;
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frm->pict_type = AV_PICTURE_TYPE_NONE;
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if (!buf_size) {
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if (h->got_seqhdr) {
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if (!frm->data[0] && (ret = ff_get_buffer(avctx, frm, 0)) < 0) {
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return ret;
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}
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h->dec_frame.priv = data; // AVFrame
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}
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do {
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ret = uavs3d_flush(h->dec_handle, &h->dec_frame);
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} while (ret > 0 && !h->dec_frame.got_pic);
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} else {
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uavs3d_io_frm_t *frm_dec = &h->dec_frame;
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buf_ptr = buf;
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buf_end = buf + buf_size;
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frm_dec->pkt_pos = avpkt->pos;
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frm_dec->pkt_size = avpkt->size;
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while (!finish) {
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int bs_len;
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if (h->got_seqhdr) {
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if (!frm->data[0] && (ret = ff_get_buffer(avctx, frm, 0)) < 0) {
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return ret;
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}
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h->dec_frame.priv = data; // AVFrame
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}
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if (uavs3d_find_next_start_code(buf_ptr, buf_end - buf_ptr, &left_bytes)) {
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bs_len = buf_end - buf_ptr - left_bytes;
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} else {
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bs_len = buf_end - buf_ptr;
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finish = 1;
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}
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frm_dec->bs = (unsigned char *)buf_ptr;
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frm_dec->bs_len = bs_len;
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frm_dec->pts = avpkt->pts;
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frm_dec->dts = avpkt->dts;
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uavs3d_decode(h->dec_handle, frm_dec);
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buf_ptr += bs_len;
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if (frm_dec->nal_type == NAL_SEQ_HEADER) {
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struct uavs3d_com_seqh_t *seqh = frm_dec->seqhdr;
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if (UAVS3D_CHECK_INVALID_RANGE(seqh->frame_rate_code, 0, 15)) {
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av_log(avctx, AV_LOG_ERROR, "Invalid frame rate code: %d.\n", seqh->frame_rate_code);
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seqh->frame_rate_code = 3; // default 25 fps
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} else {
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avctx->framerate.num = ff_avs3_frame_rate_tab[seqh->frame_rate_code].num;
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avctx->framerate.den = ff_avs3_frame_rate_tab[seqh->frame_rate_code].den;
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}
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avctx->has_b_frames = !seqh->low_delay;
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avctx->pix_fmt = seqh->bit_depth_internal == 8 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUV420P10LE;
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ff_set_dimensions(avctx, seqh->horizontal_size, seqh->vertical_size);
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h->got_seqhdr = 1;
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if (seqh->colour_description) {
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if (UAVS3D_CHECK_INVALID_RANGE(seqh->colour_primaries, 0, 9) ||
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UAVS3D_CHECK_INVALID_RANGE(seqh->transfer_characteristics, 0, 14) ||
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UAVS3D_CHECK_INVALID_RANGE(seqh->matrix_coefficients, 0, 11)) {
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av_log(avctx, AV_LOG_ERROR,
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"Invalid colour description: primaries: %d"
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"transfer characteristics: %d"
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"matrix coefficients: %d.\n",
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seqh->colour_primaries,
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seqh->transfer_characteristics,
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seqh->matrix_coefficients);
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} else {
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avctx->color_primaries = ff_avs3_color_primaries_tab[seqh->colour_primaries];
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avctx->color_trc = ff_avs3_color_transfer_tab [seqh->transfer_characteristics];
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avctx->colorspace = ff_avs3_color_matrix_tab [seqh->matrix_coefficients];
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}
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}
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}
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if (frm_dec->got_pic) {
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break;
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}
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}
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}
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*got_frame = h->dec_frame.got_pic;
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if (!(*got_frame)) {
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av_frame_unref(frm);
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}
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return buf_ptr - buf;
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}
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const AVCodec ff_libuavs3d_decoder = {
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.name = "libuavs3d",
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.long_name = NULL_IF_CONFIG_SMALL("libuavs3d AVS3-P2/IEEE1857.10"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_AVS3,
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.priv_data_size = sizeof(uavs3d_context),
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.init = libuavs3d_init,
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.close = libuavs3d_end,
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.decode = libuavs3d_decode_frame,
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.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
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.caps_internal = FF_CODEC_CAP_AUTO_THREADS,
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.flush = libuavs3d_flush,
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.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUV420P10LE,
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AV_PIX_FMT_NONE },
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.wrapper_name = "libuavs3d",
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};
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