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/*****************************************************************
* gmerlin-avdecoder - a general purpose multimedia decoding library
*
* Copyright (c) 2001 - 2012 Members of the Gmerlin project
* gmerlin-general@lists.sourceforge.net
* http://gmerlin.sourceforge.net
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* *****************************************************************/
#include <stdlib.h>
#include <string.h>
#include <avdec_private.h>
#include <utils.h>
#include <md5.h>
typedef struct
{
void * priv;
int (*read_callback)(void * priv, uint8_t * data, int len);
int64_t (*seek_callback)(void * priv, int64_t pos, int whence);
} cb_t;
static int read_callbacks(bgav_input_context_t* ctx,
uint8_t * buffer, int len)
{
cb_t * c = ctx->priv;
return c->read_callback(c->priv, buffer, len);
}
static int64_t seek_byte_callbacks(bgav_input_context_t * ctx,
int64_t pos, int whence)
{
cb_t * c = ctx->priv;
return c->seek_callback(c->priv, pos, whence);
}
static void close_callbacks(bgav_input_context_t * ctx)
{
cb_t * c = ctx->priv;
if(c)
free(c);
}
const bgav_input_t bgav_input_callbacks =
{
.name = "callbacks",
.read = read_callbacks,
.seek_byte = seek_byte_callbacks,
.close = close_callbacks
};
const bgav_input_t bgav_input_callbacks_noseek =
{
.name = "callbacks_noseek",
.read = read_callbacks,
.close = close_callbacks
};
static
bgav_input_context_t *
bgav_input_open_callbacks(int (*read_callback)(void * priv, uint8_t * data, int len),
int64_t (*seek_callback)(void * priv, int64_t pos, int whence),
void * priv,
const char * filename, const char * mimetype, int64_t total_bytes,
bgav_t * b)
{
bgav_input_context_t * ret;
cb_t * c = calloc(1, sizeof(*c));
c->read_callback = read_callback;
c->priv = priv;
ret = bgav_input_create(b, NULL);
if(seek_callback)
{
ret->input = &bgav_input_callbacks;
c->seek_callback = seek_callback;
ret->total_bytes = c->seek_callback(c->priv, 0, SEEK_END);
c->seek_callback(c->priv, 0, SEEK_SET);
}
else
{
ret->input = &bgav_input_callbacks_noseek;
}
ret->priv = c;
ret->filename = gavl_strdup(filename);
if(mimetype)
gavl_dictionary_set_string(gavl_dictionary_get_src_nc(&ret->m, GAVL_META_SRC, 0),
GAVL_META_MIMETYPE, mimetype);
ret->total_bytes = total_bytes;
if(ret->filename)
{
uint8_t md5sum[16];
bgav_md5_buffer(ret->filename, strlen(ret->filename),
md5sum);
ret->index_file =
bgav_sprintf("%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
md5sum[0], md5sum[1], md5sum[2], md5sum[3],
md5sum[4], md5sum[5], md5sum[6], md5sum[7],
md5sum[8], md5sum[9], md5sum[10], md5sum[11],
md5sum[12], md5sum[13], md5sum[14], md5sum[15]);
}
return ret;
}
int bgav_open_callbacks(bgav_t * b,
int (*read_callback)(void * priv, uint8_t * data, int len),
int64_t (*seek_callback)(void * priv, int64_t pos, int whence),
void * priv,
const char * filename, const char * mimetype, int64_t total_bytes)
{
bgav_codecs_init(&b->opt);
b->input = bgav_input_open_callbacks(read_callback, seek_callback,
priv, filename, mimetype, total_bytes,
b);
if(!b->input)
return 0;
if(!bgav_init(b))
goto fail;
return 1;
fail:
return 0;
}
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