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