addition of special image formats for Zoran MJPEG, and vd_zrmjpeg.c

the zoran passthrough filter for the new vo_zr2.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@11387 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 231 insertions, 0 deletions

diff --git a/libmpcodecs/vd_zrmjpeg.c b/libmpcodecs/vd_zrmjpeg.c
new file mode 100644
index 0000000000..37622dd639
--- /dev/null
+++ b/libmpcodecs/vd_zrmjpeg.c
@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2003 Rik Snel <snel@phys.uu.nl>, license GPL v2
+ * - based on vd_mpegpes.c by A'rpi (C) 2002-2003 
+ * - guess_mjpeg_type code stolen from lav_io.c (C) 2000 Rainer Johanni
+ *   <Rainer@Johanni.de> from the mjpegtools package
+ */
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "config.h"
+#include "mp_msg.h"
+
+/* some convenient #define's, is this portable enough? */
+#define VERBOSE(...) mp_msg(MSGT_DECVIDEO, MSGL_V, "vd_zrmjpeg: " __VA_ARGS__)
+#define ERROR(...) mp_msg(MSGT_DECVIDEO, MSGL_ERR, "vd_zrmjpeg: " __VA_ARGS__)
+#define WARNING(...) mp_msg(MSGT_DECVIDEO, MSGL_WARN, \
+		"vd_zrmjpeg: " __VA_ARGS__)
+
+#include "vd_internal.h"
+
+static vd_info_t info = 
+{
+	"Zoran MJPEG Video passthrough",
+	"zrmjpeg",
+	"Rik Snel <snel@phys.uu.nl>",
+	"Rik Snel <snel@phys.uu.nl>",
+	"for hw decoders (DC10(+)/buz/lml33)"
+};
+
+LIBVD_EXTERN(zrmjpeg)
+
+#include "libvo/video_out.h"
+
+typedef struct {
+	int vo_inited;
+	unsigned int preferred_csp;
+} vd_zrmjpeg_ctx_t;
+
+static int query_format(sh_video_t *sh, unsigned int format) {
+	vd_zrmjpeg_ctx_t *ctx = sh->context;
+	if (format == ctx->preferred_csp) return CONTROL_TRUE;
+	return CONTROL_FALSE;
+}
+	
+// to set/get/query special features/parameters
+static int control(sh_video_t *sh, int cmd, void* arg, ...) {
+	switch (cmd) {
+		case VDCTRL_QUERY_FORMAT:
+			return query_format(sh, *((unsigned int*)arg));
+	}
+	return CONTROL_UNKNOWN;
+}
+
+// init driver
+static int init(sh_video_t *sh) {
+	vd_zrmjpeg_ctx_t *ctx;
+
+	VERBOSE("init called\n");
+	ctx = malloc(sizeof(*ctx));
+	if (!ctx) return 0;
+	memset(ctx, 0, sizeof(*ctx));
+	sh->context = ctx;
+
+	/* defer init of vo until the first frame is known */
+	return 1; 
+#if 0
+	return mpcodecs_config_vo(sh, sh->disp_w, sh->disp_h, IMGFMT_ZRMJPEGIT); 
+#endif
+}
+
+// uninit driver
+static void uninit(sh_video_t *sh) {
+	free(sh->context);
+}
+
+/* parts directly stolen from scan_jpg() and lav_open_input_file */
+static int get_int2(unsigned char *buf) {
+	return buf[0]*256 + buf[1];
+}
+
+#define M_SOF0  0xC0
+#define M_SOF1  0xC1
+#define M_DHT   0xC4
+#define M_SOI   0xD8		/* Start Of Image (beginning of datastream) */
+#define M_EOI   0xD9		/* End Of Image (end of datastream) */
+#define M_SOS   0xDA		/* Start Of Scan (begins compressed data) */
+#define M_DQT   0xDB
+#define M_APP0  0xE0
+#define M_APP1  0xE1
+/* returns 0 in case of failure */
+static unsigned int guess_mjpeg_type(unsigned char *data, unsigned int size,
+		int d_height) {
+	unsigned int p;
+	int marker, length, height, ncomps, i, hf[3], vf[3];
+	unsigned int app0 = 0, header = 0;
+
+	/* The initial marker must be SIO */
+	if (size < 2) {
+		ERROR("JPEG data too short (%d bytes)\n", size);
+		return 0;
+	}
+
+	if (data[0] != 0xFF || data[1] != M_SOI) {
+		ERROR("JPEG data must start with FFD8, but doesn't\n");
+		return 0;
+	}
+	
+	p = 2; /* pointer within jpeg data */
+
+	while (p < size) {
+		/* search 0xFF */
+		while(data[p] != 0xFF) {
+			p++;
+			if (p >= size) return 0;
+		}
+		
+		/* get marker code, skip duplicate FF's */
+		while(data[p] == 0xFF) {
+			p++;
+			if (p >= size) return 0;
+		}
+
+		marker = data[p++];
+
+		/* marker may have an associated length */
+		if (p <= size - 2) length = get_int2(data+p);
+		else length = 0; 
+
+		switch (marker) {
+			case M_SOF0:
+			case M_SOF1:
+				header = p-2;
+				VERBOSE("found offset of header %u\n",
+						header);
+				break;
+			case M_SOS:
+				size = 0;
+				continue;
+			case M_APP0:
+				app0 = p-2;
+				VERBOSE("found offset of APP0 %u\n",
+						app0);
+				break;
+		}
+
+		/* these markers shouldn't have parameters,
+		 * i.e. we don't need to skip anaything */
+		if (marker == 0 || marker == 1 || 
+				(marker >= 0xd0 && marker < 0xd8))
+			continue; 
+		
+		if  (p + length <= size) p += length;
+		else {
+			ERROR("input JPEG too short, data missing\n");
+			return 0;
+		}
+	}
+
+	if (!header) {
+		ERROR("JPEG header (with resolution and sampling factors) not found\n");
+		return 0;
+	}
+
+	if (data[header + 9] != 3) {
+		ERROR("JPEG has wrong number of components\n");
+		return 0;
+	}
+
+	/* get the horizontal and vertical sample factors */
+	for (i = 0; i < 3; i++) {
+		hf[i] = data[header + 10 + 3*i + 1]>>4;
+		vf[i] = data[header + 10 + 3*i + 1]&0x0F;
+	}
+
+	if (hf[0] != 2 || hf[1] != 1 || hf[2] != 1 ||
+			vf[0] != 1 || vf[1] != 1 || vf[2] != 1) {
+		ERROR("JPEG has wrong internal image format\n");
+	} else VERBOSE("JPEG has colorspace YUV422 with minimal sampling factors (good)\n");
+
+	height = get_int2(data + header + 5);
+	if (height == d_height) {
+		VERBOSE("data is non interlaced\n");
+		return IMGFMT_ZRMJPEGNI;
+	}
+
+	if (2*height != d_height) {
+		ERROR("something very inconsistent happened\n");
+		return 0;
+	}
+
+
+	if (app0 && get_int2(data + app0 + 2) >= 5 &&
+			strncasecmp((char*)(data + app0 + 4), "AVI1", 4) == 0) {
+		if (data[app0+8] == 1) {
+			VERBOSE("data is interlaced, APP0: top-first (1)\n");
+			return IMGFMT_ZRMJPEGIT;
+		} else {
+			VERBOSE("data is interlaced, APP0: bottom-first (%d)\n",
+					data[app0+8]);
+			return IMGFMT_ZRMJPEGIB;
+		}
+	} else {
+		VERBOSE("data is interlaced, no (valid) APP0 marker, "
+				"guessing top-first\n");
+		return IMGFMT_ZRMJPEGIT;
+	}
+
+	
+	return 0;
+}	
+
+// decode a frame
+static mp_image_t* decode(sh_video_t *sh, void* data, int len, int flags) {
+	mp_image_t* mpi;
+	vd_zrmjpeg_ctx_t *ctx = sh->context;
+
+	if (!ctx->vo_inited) {
+		ctx->preferred_csp = guess_mjpeg_type(data, len, sh->disp_h);
+		if (ctx->preferred_csp == 0) return NULL;
+		mpcodecs_config_vo(sh, sh->disp_w, sh->disp_h, 
+				ctx->preferred_csp);
+		ctx->vo_inited = 1;
+	}
+
+	mpi = mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, 0, 
+			sh->disp_w, sh->disp_h);
+	/* abuse of mpi */
+    	mpi->planes[0]=(uint8_t*)data;
+	mpi->planes[1]=(uint8_t*)len;
+    	return mpi;
+}