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-rw-r--r--libavcodec/libdavs2.c212
1 files changed, 212 insertions, 0 deletions
diff --git a/libavcodec/libdavs2.c b/libavcodec/libdavs2.c
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+++ b/libavcodec/libdavs2.c
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+/*
+ * 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 "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, "dump error: alloc failed.\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 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;
+}
+
+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,
+ .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
+ .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_NONE },
+ .wrapper_name = "libdavs2",
+};
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