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/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libavutil/common.h>
#include "stream.h"
struct priv {
bstr data;
};
static int fill_buffer(stream_t *s, char* buffer, int len)
{
struct priv *p = s->priv;
bstr data = p->data;
if (s->pos < 0 || s->pos > data.len)
return 0;
len = FFMIN(len, data.len - s->pos);
memcpy(buffer, data.start + s->pos, len);
return len;
}
static int seek(stream_t *s, int64_t newpos)
{
return 1;
}
static int control(stream_t *s, int cmd, void *arg)
{
struct priv *p = s->priv;
switch(cmd) {
case STREAM_CTRL_GET_SIZE:
*(int64_t *)arg = p->data.len;
return 1;
case STREAM_CTRL_SET_CONTENTS: ;
bstr *data = (bstr *)arg;
talloc_free(p->data.start);
p->data = bstrdup(s, *data);
return 1;
}
return STREAM_UNSUPPORTED;
}
static int h_to_i(unsigned char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
return -1;
}
static bool bstr_to_hex_inplace(bstr *h)
{
if (h->len % 2)
return false;
for (int n = 0; n < h->len / 2; n++) {
int hi = h_to_i(h->start[n * 2 + 0]);
int lo = h_to_i(h->start[n * 2 + 1]);
if (hi < 0 || lo < 0)
return false;
h->start[n] = (hi << 4) | lo;
}
h->len /= 2;
return true;
}
static int open_f(stream_t *stream)
{
stream->fill_buffer = fill_buffer;
stream->seek = seek;
stream->seekable = true;
stream->control = control;
stream->read_chunk = 1024 * 1024;
stream->allow_caching = false;
struct priv *p = talloc_zero(stream, struct priv);
stream->priv = p;
// Initial data
bstr data = bstr0(stream->url);
bool use_hex = bstr_eatstart0(&data, "hex://");
if (!use_hex)
bstr_eatstart0(&data, "memory://");
stream_control(stream, STREAM_CTRL_SET_CONTENTS, &data);
if (use_hex && !bstr_to_hex_inplace(&p->data)) {
MP_FATAL(stream, "Invalid data.\n");
return STREAM_ERROR;
}
return STREAM_OK;
}
const stream_info_t stream_info_memory = {
.name = "memory",
.open = open_f,
.protocols = (const char*const[]){ "memory", "hex", NULL },
};
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