mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 01:22:30 +00:00
116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv 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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* mpv 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
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* GNU 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 mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libavutil/common.h>
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#include "stream.h"
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struct priv {
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bstr data;
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};
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static int fill_buffer(stream_t *s, char* buffer, int len)
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{
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struct priv *p = s->priv;
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bstr data = p->data;
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if (s->pos < 0 || s->pos > data.len)
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return 0;
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len = FFMIN(len, data.len - s->pos);
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memcpy(buffer, data.start + s->pos, len);
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return len;
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}
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static int seek(stream_t *s, int64_t newpos)
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{
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return 1;
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}
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static int control(stream_t *s, int cmd, void *arg)
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{
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struct priv *p = s->priv;
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switch(cmd) {
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case STREAM_CTRL_GET_SIZE:
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*(int64_t *)arg = p->data.len;
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return 1;
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case STREAM_CTRL_SET_CONTENTS: ;
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bstr *data = (bstr *)arg;
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talloc_free(p->data.start);
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p->data = bstrdup(s, *data);
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return 1;
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}
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return STREAM_UNSUPPORTED;
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}
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static int h_to_i(unsigned char c)
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{
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if (c >= '0' && c <= '9')
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return c - '0';
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if (c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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if (c >= 'A' && c <= 'F')
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return c - 'A' + 10;
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return -1;
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}
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static bool bstr_to_hex_inplace(bstr *h)
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{
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if (h->len % 2)
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return false;
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for (int n = 0; n < h->len / 2; n++) {
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int hi = h_to_i(h->start[n * 2 + 0]);
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int lo = h_to_i(h->start[n * 2 + 1]);
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if (hi < 0 || lo < 0)
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return false;
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h->start[n] = (hi << 4) | lo;
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}
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h->len /= 2;
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return true;
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}
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static int open_f(stream_t *stream)
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{
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stream->fill_buffer = fill_buffer;
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stream->seek = seek;
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stream->seekable = true;
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stream->control = control;
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stream->read_chunk = 1024 * 1024;
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stream->allow_caching = false;
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struct priv *p = talloc_zero(stream, struct priv);
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stream->priv = p;
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// Initial data
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bstr data = bstr0(stream->url);
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bool use_hex = bstr_eatstart0(&data, "hex://");
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if (!use_hex)
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bstr_eatstart0(&data, "memory://");
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stream_control(stream, STREAM_CTRL_SET_CONTENTS, &data);
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if (use_hex && !bstr_to_hex_inplace(&p->data)) {
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MP_FATAL(stream, "Invalid data.\n");
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return STREAM_ERROR;
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}
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return STREAM_OK;
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}
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const stream_info_t stream_info_memory = {
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.name = "memory",
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.open = open_f,
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.protocols = (const char*const[]){ "memory", "hex", NULL },
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};
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