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FFmpeg/libavcodec/libdavs2.c
Andreas Rheinhardt a247ac640d avcodec: Constify AVCodecs
Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2021-04-27 10:43:15 -03:00

231 lines
7.3 KiB
C

/*
* AVS2 decoding using the davs2 library
*
* Copyright (C) 2018 Yiqun Xu, <yiqun.xu@vipl.ict.ac.cn>
* Falei Luo, <falei.luo@gmail.com>
* 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 "avcodec.h"
#include "internal.h"
#include "davs2.h"
typedef struct DAVS2Context {
void *decoder;
AVFrame *frame;
davs2_param_t param; // decoding parameters
davs2_packet_t packet; // input bitstream
davs2_picture_t out_frame; // output data, frame data
davs2_seq_info_t headerset; // output data, sequence header
}DAVS2Context;
static av_cold int davs2_init(AVCodecContext *avctx)
{
DAVS2Context *cad = avctx->priv_data;
int cpu_flags = av_get_cpu_flags();
/* init the decoder */
cad->param.threads = avctx->thread_count;
cad->param.info_level = 0;
cad->param.disable_avx = !(cpu_flags & AV_CPU_FLAG_AVX &&
cpu_flags & AV_CPU_FLAG_AVX2);
cad->decoder = davs2_decoder_open(&cad->param);
if (!cad->decoder) {
av_log(avctx, AV_LOG_ERROR, "decoder created error.");
return AVERROR_EXTERNAL;
}
av_log(avctx, AV_LOG_VERBOSE, "decoder created. %p\n", cad->decoder);
return 0;
}
static int davs2_dump_frames(AVCodecContext *avctx, davs2_picture_t *pic, int *got_frame,
davs2_seq_info_t *headerset, int ret_type, AVFrame *frame)
{
DAVS2Context *cad = avctx->priv_data;
int bytes_per_sample = pic->bytes_per_sample;
int plane = 0;
int line = 0;
if (!headerset) {
*got_frame = 0;
return 0;
}
if (!pic || ret_type == DAVS2_GOT_HEADER) {
avctx->width = headerset->width;
avctx->height = headerset->height;
avctx->pix_fmt = headerset->output_bit_depth == 10 ?
AV_PIX_FMT_YUV420P10 : AV_PIX_FMT_YUV420P;
avctx->framerate = av_d2q(headerset->frame_rate,4096);
*got_frame = 0;
return 0;
}
switch (pic->type) {
case DAVS2_PIC_I:
case DAVS2_PIC_G:
frame->pict_type = AV_PICTURE_TYPE_I;
break;
case DAVS2_PIC_P:
case DAVS2_PIC_S:
frame->pict_type = AV_PICTURE_TYPE_P;
break;
case DAVS2_PIC_B:
frame->pict_type = AV_PICTURE_TYPE_B;
break;
case DAVS2_PIC_F:
frame->pict_type = AV_PICTURE_TYPE_S;
break;
default:
av_log(avctx, AV_LOG_ERROR, "Decoder error: unknown frame type\n");
return AVERROR_EXTERNAL;
}
for (plane = 0; plane < 3; ++plane) {
int size_line = pic->widths[plane] * bytes_per_sample;
frame->buf[plane] = av_buffer_alloc(size_line * pic->lines[plane]);
if (!frame->buf[plane]){
av_log(avctx, AV_LOG_ERROR, "Decoder error: allocation failure, can't dump frames.\n");
return AVERROR(ENOMEM);
}
frame->data[plane] = frame->buf[plane]->data;
frame->linesize[plane] = size_line;
for (line = 0; line < pic->lines[plane]; ++line)
memcpy(frame->data[plane] + line * size_line,
pic->planes[plane] + line * pic->strides[plane],
pic->widths[plane] * bytes_per_sample);
}
frame->width = cad->headerset.width;
frame->height = cad->headerset.height;
frame->pts = cad->out_frame.pts;
frame->format = avctx->pix_fmt;
*got_frame = 1;
return 0;
}
static void davs2_flush(AVCodecContext *avctx)
{
DAVS2Context *cad = avctx->priv_data;
int ret = DAVS2_GOT_FRAME;
while (ret == DAVS2_GOT_FRAME) {
ret = davs2_decoder_flush(cad->decoder, &cad->headerset, &cad->out_frame);
davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
}
if (ret == DAVS2_ERROR) {
av_log(avctx, AV_LOG_WARNING, "Decoder flushing failed.\n");
}
}
static int send_delayed_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame)
{
DAVS2Context *cad = avctx->priv_data;
int ret = DAVS2_DEFAULT;
ret = davs2_decoder_flush(cad->decoder, &cad->headerset, &cad->out_frame);
if (ret == DAVS2_ERROR) {
av_log(avctx, AV_LOG_ERROR, "Decoder error: can't flush delayed frame\n");
return AVERROR_EXTERNAL;
}
if (ret == DAVS2_GOT_FRAME) {
ret = davs2_dump_frames(avctx, &cad->out_frame, got_frame, &cad->headerset, ret, frame);
davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
}
return ret;
}
static av_cold int davs2_end(AVCodecContext *avctx)
{
DAVS2Context *cad = avctx->priv_data;
/* close the decoder */
if (cad->decoder) {
davs2_decoder_close(cad->decoder);
cad->decoder = NULL;
}
return 0;
}
static int davs2_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
DAVS2Context *cad = avctx->priv_data;
int buf_size = avpkt->size;
uint8_t *buf_ptr = avpkt->data;
AVFrame *frame = data;
int ret = DAVS2_DEFAULT;
/* end of stream, output what is still in the buffers */
if (!buf_size) {
return send_delayed_frame(avctx, frame, got_frame);
}
cad->packet.data = buf_ptr;
cad->packet.len = buf_size;
cad->packet.pts = avpkt->pts;
cad->packet.dts = avpkt->dts;
ret = davs2_decoder_send_packet(cad->decoder, &cad->packet);
if (ret == DAVS2_ERROR) {
av_log(avctx, AV_LOG_ERROR, "Decoder error: can't read packet\n");
return AVERROR_EXTERNAL;
}
ret = davs2_decoder_recv_frame(cad->decoder, &cad->headerset, &cad->out_frame);
if (ret != DAVS2_DEFAULT) {
ret = davs2_dump_frames(avctx, &cad->out_frame, got_frame, &cad->headerset, ret, frame);
davs2_decoder_frame_unref(cad->decoder, &cad->out_frame);
}
return ret == 0 ? buf_size : ret;
}
const AVCodec ff_libdavs2_decoder = {
.name = "libdavs2",
.long_name = NULL_IF_CONFIG_SMALL("libdavs2 AVS2-P2/IEEE1857.4"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_AVS2,
.priv_data_size = sizeof(DAVS2Context),
.init = davs2_init,
.close = davs2_end,
.decode = davs2_decode_frame,
.flush = davs2_flush,
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_OTHER_THREADS,
.caps_internal = FF_CODEC_CAP_AUTO_THREADS,
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
AV_PIX_FMT_NONE },
.wrapper_name = "libdavs2",
};