mirror of https://git.ffmpeg.org/ffmpeg.git
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/*
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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 "config.h"
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#include "libavutil/hwcontext.h"
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#include "libavutil/hwcontext_cuda_internal.h"
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#include "libavutil/cuda_check.h"
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#if CONFIG_PTX_COMPRESSION
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#include <zlib.h>
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#define CHUNK_SIZE 1024 * 64
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#endif
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#include "load_helper.h"
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#define CHECK_CU(x) FF_CUDA_CHECK_DL(avctx, cu, x)
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int ff_cuda_load_module(void *avctx, AVCUDADeviceContext *hwctx, CUmodule *cu_module,
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const unsigned char *data, const unsigned int length)
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{
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CudaFunctions *cu = hwctx->internal->cuda_dl;
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#if CONFIG_PTX_COMPRESSION
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z_stream stream = { 0 };
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uint8_t *buf, *tmp;
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uint64_t buf_size;
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int ret;
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if (inflateInit2(&stream, 32 + 15) != Z_OK) {
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av_log(avctx, AV_LOG_ERROR, "Error during zlib initialisation: %s\n", stream.msg);
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return AVERROR(ENOSYS);
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}
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buf_size = CHUNK_SIZE * 4;
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buf = av_realloc(NULL, buf_size);
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if (!buf) {
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inflateEnd(&stream);
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return AVERROR(ENOMEM);
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}
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stream.next_in = data;
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stream.avail_in = length;
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do {
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stream.avail_out = buf_size - stream.total_out;
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stream.next_out = buf + stream.total_out;
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ret = inflate(&stream, Z_FINISH);
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if (ret != Z_OK && ret != Z_STREAM_END) {
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av_log(avctx, AV_LOG_ERROR, "zlib inflate error: %s\n", stream.msg);
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inflateEnd(&stream);
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av_free(buf);
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return AVERROR(EINVAL);
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}
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if (stream.avail_out == 0) {
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buf_size += CHUNK_SIZE;
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tmp = av_realloc(buf, buf_size);
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if (!tmp) {
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inflateEnd(&stream);
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av_free(buf);
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return AVERROR(ENOMEM);
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}
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buf = tmp;
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}
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} while (ret != Z_STREAM_END);
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// NULL-terminate string
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// there is guaranteed to be space for this, due to condition in loop
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buf[stream.total_out] = 0;
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inflateEnd(&stream);
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ret = CHECK_CU(cu->cuModuleLoadData(cu_module, buf));
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av_free(buf);
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return ret;
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#else
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return CHECK_CU(cu->cuModuleLoadData(cu_module, data));
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#endif
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}
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