mirror of https://github.com/mpv-player/mpv
123 lines
3.3 KiB
C
123 lines
3.3 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 General Public License as published by
|
|
* the Free Software Foundation; either version 2 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with mpv. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
#include <libavcodec/avcodec.h>
|
|
|
|
#include "common/av_common.h"
|
|
#include "common/common.h"
|
|
|
|
#include "packet.h"
|
|
|
|
static void packet_destroy(void *ptr)
|
|
{
|
|
struct demux_packet *dp = ptr;
|
|
talloc_free(dp->avpacket);
|
|
av_free(dp->allocation);
|
|
}
|
|
|
|
static struct demux_packet *create_packet(size_t len)
|
|
{
|
|
if (len > 1000000000) {
|
|
fprintf(stderr, "Attempt to allocate demux packet over 1 GB!\n");
|
|
abort();
|
|
}
|
|
struct demux_packet *dp = talloc(NULL, struct demux_packet);
|
|
talloc_set_destructor(dp, packet_destroy);
|
|
*dp = (struct demux_packet) {
|
|
.len = len,
|
|
.pts = MP_NOPTS_VALUE,
|
|
.dts = MP_NOPTS_VALUE,
|
|
.duration = -1,
|
|
.pos = -1,
|
|
.stream = -1,
|
|
};
|
|
return dp;
|
|
}
|
|
|
|
struct demux_packet *new_demux_packet(size_t len)
|
|
{
|
|
struct demux_packet *dp = create_packet(len);
|
|
dp->buffer = av_malloc(len + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!dp->buffer) {
|
|
fprintf(stderr, "Memory allocation failure!\n");
|
|
abort();
|
|
}
|
|
memset(dp->buffer + len, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
|
dp->allocation = dp->buffer;
|
|
return dp;
|
|
}
|
|
|
|
// data must already have suitable padding, and does not copy the data
|
|
struct demux_packet *new_demux_packet_fromdata(void *data, size_t len)
|
|
{
|
|
struct demux_packet *dp = create_packet(len);
|
|
dp->buffer = data;
|
|
return dp;
|
|
}
|
|
|
|
struct demux_packet *new_demux_packet_from(void *data, size_t len)
|
|
{
|
|
struct demux_packet *dp = new_demux_packet(len);
|
|
memcpy(dp->buffer, data, len);
|
|
return dp;
|
|
}
|
|
|
|
void demux_packet_shorten(struct demux_packet *dp, size_t len)
|
|
{
|
|
assert(len <= dp->len);
|
|
dp->len = len;
|
|
memset(dp->buffer + dp->len, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
|
}
|
|
|
|
void free_demux_packet(struct demux_packet *dp)
|
|
{
|
|
talloc_free(dp);
|
|
}
|
|
|
|
static void destroy_avpacket(void *pkt)
|
|
{
|
|
av_free_packet(pkt);
|
|
}
|
|
|
|
struct demux_packet *demux_copy_packet(struct demux_packet *dp)
|
|
{
|
|
struct demux_packet *new = NULL;
|
|
if (dp->avpacket) {
|
|
assert(dp->buffer == dp->avpacket->data);
|
|
assert(dp->len == dp->avpacket->size);
|
|
AVPacket *newavp = talloc_zero(NULL, AVPacket);
|
|
talloc_set_destructor(newavp, destroy_avpacket);
|
|
av_init_packet(newavp);
|
|
if (av_packet_ref(newavp, dp->avpacket) < 0)
|
|
abort();
|
|
new = new_demux_packet_fromdata(newavp->data, newavp->size);
|
|
new->avpacket = newavp;
|
|
}
|
|
if (!new) {
|
|
new = new_demux_packet(dp->len);
|
|
memcpy(new->buffer, dp->buffer, new->len);
|
|
}
|
|
new->pts = dp->pts;
|
|
new->dts = dp->dts;
|
|
new->duration = dp->duration;
|
|
return new;
|
|
}
|