liblzo realtime video codec support (decoding only)

patch by Tilmann Bitterberg <transcode@tibit.org>


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7730 b3059339-0415-0410-9bf9-f77b7e298cf2

3 files changed, 156 insertions, 0 deletions

diff --git a/libmpcodecs/Makefile b/libmpcodecs/Makefile
index 3380523809..6433b39c2a 100644
--- a/libmpcodecs/Makefile
+++ b/libmpcodecs/Makefile
@@ -22,6 +22,10 @@ ifeq ($(JPEG),yes)
 VIDEO_SRCS += vd_ijpg.c
 endif
 
+ifeq ($(LZO),yes)
+VIDEO_SRCS += vd_lzo.c
+endif
+
 SRCS=$(AUDIO_SRCS) $(VIDEO_SRCS) $(VFILTER_SRCS) $(NATIVE_SRCS) img_format.c
 OBJS=$(SRCS:.c=.o)
 
diff --git a/libmpcodecs/vd.c b/libmpcodecs/vd.c
index 56f804261d..96376c02da 100644
--- a/libmpcodecs/vd.c
+++ b/libmpcodecs/vd.c
@@ -55,6 +55,7 @@ extern vd_functions_t mpcodecs_vd_svq1;
 extern vd_functions_t mpcodecs_vd_xvid;
 extern vd_functions_t mpcodecs_vd_libdv;
 extern vd_functions_t mpcodecs_vd_lcl;
+extern vd_functions_t mpcodecs_vd_lzo;
 
 vd_functions_t* mpcodecs_vd_drivers[] = {
         &mpcodecs_vd_null,
@@ -76,6 +77,9 @@ vd_functions_t* mpcodecs_vd_drivers[] = {
         &mpcodecs_vd_divx4,
 #endif
 #endif
+#ifdef USE_LZO
+        &mpcodecs_vd_lzo,
+#endif
         &mpcodecs_vd_raw,
         &mpcodecs_vd_msrle,
         &mpcodecs_vd_msvidc,
diff --git a/libmpcodecs/vd_lzo.c b/libmpcodecs/vd_lzo.c
new file mode 100644
index 0000000000..b8b4bd2337
--- /dev/null
+++ b/libmpcodecs/vd_lzo.c
@@ -0,0 +1,148 @@
+#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
+   */