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#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "mp_msg.h"
#include "vd_internal.h"
#include <lzo1x.h>
#define MOD_NAME "DecLZO"
static vd_info_t info = {
"LZO compressed Video",
"lzo",
"Tilmann Bitterberg",
"Transcode development team <http://www.theorie.physik.uni-goettingen.de/~ostreich/transcode/>",
"based on liblzo: http://www.oberhumer.com/opensource/lzo/"
};
LIBVD_EXTERN(lzo)
static lzo_byte *wrkmem=NULL;
static int codec = -1;
// to set/get/query special features/parameters
static int control (sh_video_t *sh, int cmd, void* arg, ...)
{
//printf("[%s] Query!! (%s)\n", MOD_NAME, (codec==IMGFMT_BGR24)?"BGR":"none");
//printf("[%s] Query!! (%s)\n", MOD_NAME, (codec==IMGFMT_YV12)?"YV12":"none");
switch(cmd){
case VDCTRL_QUERY_FORMAT:
if( (*((int*)arg)) == IMGFMT_BGR24 && codec == IMGFMT_BGR24) return CONTROL_TRUE;
if( (*((int*)arg)) == IMGFMT_YV12 && codec == IMGFMT_YV12) return CONTROL_TRUE;
return CONTROL_FALSE;
}
return CONTROL_UNKNOWN;
}
// init driver
static int init(sh_video_t *sh)
{
if (lzo_init() != LZO_E_OK) {
mp_msg (MSGT_DECVIDEO, MSGL_WARN, "[%s] lzo_init() failed\n", MOD_NAME);
return 0;
}
if (!wrkmem) wrkmem = (lzo_bytep) lzo_malloc(LZO1X_1_MEM_COMPRESS);
if (wrkmem == NULL) {
mp_msg (MSGT_DECVIDEO, MSGL_ERR, "[%s] Cannot alloc work memory\n", MOD_NAME);
return 0;
}
return 1;
}
// uninit driver
static void uninit(sh_video_t *sh)
{
if (wrkmem) { lzo_free(wrkmem); wrkmem = NULL;}
}
//mp_image_t* mpcodecs_get_image(sh_video_t *sh, int mp_imgtype, int mp_imgflag, int w, int h);
// decode a frame
static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags)
{
static int init_done = 0;
int r;
int cb = 1;
int cr = 2;
mp_image_t* mpi;
int w, h;
if (len <= 0) {
return NULL; // skipped frame
}
if (!init_done) {
lzo_byte *tmp=NULL;
// decompress one frame to see if its
// either YV12 or RGB24
if (!tmp) tmp = lzo_malloc(sh->bih->biSizeImage);
mp_msg (MSGT_DECVIDEO, MSGL_V, "[%s] 2 depth %d, format %d data %p len (%d) (%d)\n",
MOD_NAME, sh->bih->biBitCount, sh->format, data, len, sh->bih->biSizeImage
);
/* decompress the frame */
r = lzo1x_decompress (data, len, tmp, &w, wrkmem);
if (r != LZO_E_OK) {
/* this should NEVER happen */
mp_msg (MSGT_DECVIDEO, MSGL_ERR,
"[%s] internal error - decompression failed: %d\n", MOD_NAME, r);
return NULL;
}
if (w == (sh->bih->biSizeImage)) {
codec = IMGFMT_BGR24;
mp_msg (MSGT_DECVIDEO, MSGL_V, "[%s] codec choosen is BGR24\n", MOD_NAME);
} else if (w == (sh->bih->biSizeImage)/2) {
codec = IMGFMT_YV12;
mp_msg (MSGT_DECVIDEO, MSGL_V, "[%s] codec choosen is YV12\n", MOD_NAME);
} else {
codec = -1;
mp_msg(MSGT_DECVIDEO,MSGL_ERR,"[%s] Unsupported out_fmt\n", MOD_NAME);
return NULL;
}
mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,codec);
init_done++;
free(tmp);
}
mpi = mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, 0,
sh->disp_w, sh->disp_h);
if (!mpi) {
mp_msg (MSGT_DECVIDEO, MSGL_ERR, "[%s] mpcodecs_get_image failed\n", MOD_NAME);
return NULL;
}
r = lzo1x_decompress (data, len, mpi->planes[0], &w, wrkmem);
if (r != LZO_E_OK) {
/* this should NEVER happen */
mp_msg (MSGT_DECVIDEO, MSGL_ERR,
"[%s] internal error - decompression failed: %d\n", MOD_NAME, r);
return NULL;
}
mp_msg (MSGT_DECVIDEO, MSGL_DBG2,
"[%s] decompressed %lu bytes into %lu bytes\n", MOD_NAME,
(long) len, (long)w);
return mpi;
}
/* vim: sw=4
*/
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