path: root/libmpdemux/demuxer.c

/*
 * DEMUXER v2.5
 *
 * This file is part of MPlayer.
 *
 * MPlayer 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.
 *
 * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>

#include <sys/types.h>
#include <sys/stat.h>

#include "config.h"
#include "options.h"
#include "talloc.h"
#include "mp_msg.h"
#include "m_config.h"

#include "libvo/fastmemcpy.h"

#include "stream/stream.h"
#include "demuxer.h"
#include "stheader.h"
#include "mf.h"

#include "libaf/af_format.h"

#include "libavcodec/avcodec.h"
#if MP_INPUT_BUFFER_PADDING_SIZE < FF_INPUT_BUFFER_PADDING_SIZE
#error MP_INPUT_BUFFER_PADDING_SIZE is too small!
#endif

static void clear_parser(sh_common_t *sh);

// Demuxer list
extern const struct demuxer_desc demuxer_desc_edl;
extern const struct demuxer_desc demuxer_desc_cue;
extern const demuxer_desc_t demuxer_desc_rawaudio;
extern const demuxer_desc_t demuxer_desc_rawvideo;
extern const demuxer_desc_t demuxer_desc_tv;
extern const demuxer_desc_t demuxer_desc_mf;
extern const demuxer_desc_t demuxer_desc_avi;
extern const demuxer_desc_t demuxer_desc_asf;
extern const demuxer_desc_t demuxer_desc_real;
extern const demuxer_desc_t demuxer_desc_matroska;
extern const demuxer_desc_t demuxer_desc_realaudio;
extern const demuxer_desc_t demuxer_desc_vivo;
extern const demuxer_desc_t demuxer_desc_gif;
extern const demuxer_desc_t demuxer_desc_avs;
extern const demuxer_desc_t demuxer_desc_rawdv;
extern const demuxer_desc_t demuxer_desc_audio;
extern const demuxer_desc_t demuxer_desc_rtp;
extern const demuxer_desc_t demuxer_desc_rtp_nemesi;
extern const demuxer_desc_t demuxer_desc_lavf;
extern const demuxer_desc_t demuxer_desc_lavf_preferred;
extern const demuxer_desc_t demuxer_desc_mng;

/* Please do not add any new demuxers here. If you want to implement a new
 * demuxer, add it to libavformat, except for wrappers around external
 * libraries and demuxers requiring binary support. */

const demuxer_desc_t *const demuxer_list[] = {
    &demuxer_desc_edl,
    &demuxer_desc_cue,
    &demuxer_desc_rawaudio,
    &demuxer_desc_rawvideo,
#ifdef CONFIG_TV
    &demuxer_desc_tv,
#endif
    &demuxer_desc_mf,
    &demuxer_desc_lavf_preferred,
    &demuxer_desc_avi,
    &demuxer_desc_asf,
    &demuxer_desc_matroska,
    &demuxer_desc_realaudio,
#ifdef CONFIG_GIF
    &demuxer_desc_gif,
#endif
#ifdef CONFIG_WIN32DLL
    &demuxer_desc_avs,
#endif
    &demuxer_desc_audio,
#ifdef CONFIG_LIVE555
    &demuxer_desc_rtp,
#endif
#ifdef CONFIG_LIBNEMESI
    &demuxer_desc_rtp_nemesi,
#endif
    &demuxer_desc_lavf,
#ifdef CONFIG_LIBDV095
    &demuxer_desc_rawdv,
#endif
#ifdef CONFIG_MNG
    &demuxer_desc_mng,
#endif
    /* Please do not add any new demuxers here. If you want to implement a new
     * demuxer, add it to libavformat, except for wrappers around external
     * libraries and demuxers requiring binary support. */
    NULL
};

static struct demux_packet *create_packet(size_t len)
{
    if (len > 1000000000) {
        mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Attempt to allocate demux packet "
               "over 1 GB!\n");
        abort();
    }
    struct demux_packet *dp = malloc(sizeof(struct demux_packet));
    dp->len = len;
    dp->next = NULL;
    dp->pts = MP_NOPTS_VALUE;
    dp->duration = -1;
    dp->stream_pts = MP_NOPTS_VALUE;
    dp->pos = 0;
    dp->keyframe = false;
    dp->refcount = 1;
    dp->master = NULL;
    dp->buffer = NULL;
    dp->avpacket = NULL;
    return dp;
}

struct demux_packet *new_demux_packet(size_t len)
{
    struct demux_packet *dp = create_packet(len);
    dp->buffer = malloc(len + MP_INPUT_BUFFER_PADDING_SIZE);
    if (!dp->buffer) {
        mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Memory allocation failure!\n");
        abort();
    }
    memset(dp->buffer + len, 0, 8);
    return dp;
}

// data must already have suitable padding
struct demux_packet *new_demux_packet_fromdata(void *data, size_t len)
{
    struct demux_packet *dp = create_packet(len);
    dp->buffer = data;
    return dp;
}

void resize_demux_packet(struct demux_packet *dp, size_t len)
{
    if (len > 1000000000) {
        mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Attempt to realloc demux packet "
               "over 1 GB!\n");
        abort();
    }
    dp->buffer = realloc(dp->buffer, len + MP_INPUT_BUFFER_PADDING_SIZE);
    if (!dp->buffer) {
        mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Memory allocation failure!\n");
        abort();
    }
    memset(dp->buffer + len, 0, 8);
    dp->len = len;
}

struct demux_packet *clone_demux_packet(struct demux_packet *pack)
{
    struct demux_packet *dp = malloc(sizeof(struct demux_packet));
    while (pack->master)
        pack = pack->master;  // find the master
    memcpy(dp, pack, sizeof(struct demux_packet));
    dp->next = N