mirror of
https://github.com/mpv-player/mpv
synced 2024-12-29 10:32:15 +00:00
115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/*
|
|
* 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;
|
|
|
|
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 },
|
|
};
|