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ffmpeg/libavcodec/libuavs3d.c

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/*
* 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",
};
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