New MD5 sum video output driver. For every frame, it calculates the MD5 sum

and writes a list of those sums to an, optionally specified, output file.
It does not rely on external programs to be installed. The MD5 sum code is
borrowed from the uCIFS library, written by Christopher R. Hertel in 2004
and released under the LGPL license.

Note: This driver is not yet activated and will not be compiled and linked
to libvo. A separate patch will take care of that. This is just for adding
the files to the repository.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@13396 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 351 insertions, 0 deletions

diff --git a/libvo/vo_md5sum.c b/libvo/vo_md5sum.c
new file mode 100644
index 0000000000..dd882dc39b
--- /dev/null
+++ b/libvo/vo_md5sum.c
@@ -0,0 +1,351 @@
+/* ------------------------------------------------------------------------- */
+
+/* 
+ * vo_md5sum.c, md5sum Video Output Driver for MPlayer
+ *
+ * 
+ * Written by Ivo van Poorten. (GPL)2004
+ *
+ *
+ * Changelog
+ * 
+ * 2004-09-13   First draft.
+ * 2004-09-16   Second draft. It now acts on VOCTRL_DRAW_IMAGE and does not
+ *              maintain a local copy of the image if the format is YV12.
+ *              Speed improvement and uses less memory.
+ *
+ */
+
+/* ------------------------------------------------------------------------- */
+
+/* Global Includes */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+/* ------------------------------------------------------------------------- */
+
+/* Local Includes */
+
+#include "config.h"
+#include "mp_msg.h"
+#include "video_out.h"
+#include "video_out_internal.h"
+#include "mplayer.h"			/* for exit_player() */
+#include "help_mp.h"
+#include "md5sum.h"
+
+/* ------------------------------------------------------------------------- */
+
+/* Defines */
+
+/* Used for temporary buffers to store file- and pathnames */
+#define BUFLENGTH 512
+
+/* ------------------------------------------------------------------------- */
+
+/* Info */
+
+static vo_info_t info=
+{
+	"md5sum of each frame",
+	"md5sum",
+	"Ivo van Poorten (ivop@euronet.nl)",
+	""
+};
+
+LIBVO_EXTERN (md5sum)
+
+/* ------------------------------------------------------------------------- */
+
+/* Global Variables */
+
+char *md5sum_outfile = NULL;
+
+FILE *md5sum_fd;
+int framenum = 0;
+
+/* ------------------------------------------------------------------------- */
+
+/** \brief Memory allocation failed.
+ *
+ * The video output driver failed to allocate a block of memory it needed.
+ * It displays a message and exits the player.
+ *
+ * \return nothing It does not return.
+ */
+
+void md5sum_malloc_failed(void) {
+    mp_msg(MSGT_VO, MSGL_ERR, "%s: %s\n", info.short_name,
+            MSGTR_MemAllocFailed);
+    exit_player(MSGTR_Exit_error);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/** \brief An error occured while writing to a file.
+ *
+ * The program failed to write data to a file.
+ * It displays a message and exits the player.
+ *
+ * \return nothing It does not return.
+ */
+
+void md5sum_write_error(void) {
+    mp_msg(MSGT_VO, MSGL_ERR, MSGTR_ErrorWritingFile, info.short_name);
+    exit_player(MSGTR_Exit_error);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/** \brief Pre-initialisation.
+ *
+ * This function is called before initialising the video output driver. It
+ * parses all suboptions and sets variables accordingly. If an error occurs
+ * (like an option being out of range, not having any value or an unknown
+ * option is stumbled upon) the player will exit. It also sets default
+ * values if necessary.
+ *
+ * \param arg   A string containing all the suboptions passed to the video
+ *              output driver.
+ *
+ * \return 0    All went well.
+ */
+
+static uint32_t preinit(const char *arg)
+{
+    char *buf;      /* buf is used to store parsed string values */
+
+    mp_msg(MSGT_VO, MSGL_INFO, "%s: %s\n", info.short_name,
+                                            MSGTR_VO_ParsingSuboptions);
+    
+    if (arg) {
+
+        while (*arg != '\0') {
+            if (!strncmp(arg, ":", 1)) {
+                arg++;
+                continue;   /* multiple ':' is not really an error */
+            } else if (!strncmp(arg, "outfile=", 8)) {
+                arg += 8;
+                buf = malloc(strlen(arg)+1); /* maximum length possible */
+                if (!buf) {
+                    md5sum_malloc_failed(); /* message and exit_player! */
+                }
+                if (sscanf(arg, "%[^:]", buf) == 1) {
+                    mp_msg(MSGT_VO, MSGL_INFO, "%s: %s --> %s\n",
+                            info.short_name, "outfile", buf);
+                    arg += strlen(buf);
+                    md5sum_outfile = strdup(buf);
+                    if (!md5sum_outfile) md5sum_malloc_failed();
+                    free(buf);
+                } else {
+                    mp_msg(MSGT_VO, MSGL_ERR, "%s: %s - %s\n",
+                            info.short_name, "outfile",
+                            MSGTR_VO_NoValueSpecified);
+                    exit_player(MSGTR_Exit_error);
+                }
+            } else {
+                mp_msg(MSGT_VO, MSGL_ERR, "%s: %s %-20s...\n", info.short_name,
+                        MSGTR_VO_UnknownSuboptions, arg);
+                exit_player(MSGTR_Exit_error);
+            }
+        } /* end while */
+    } /* endif */
+    
+    /* If md5sum_outfile is not set by an option, resort to default of
+                                                                "md5sums" */
+    if (!md5sum_outfile) {
+        md5sum_outfile = strdup("md5sums");
+        if (!md5sum_outfile) md5sum_malloc_failed();
+    }
+
+    mp_msg(MSGT_VO, MSGL_INFO, "%s: %s\n", info.short_name,
+                                            MSGTR_VO_SuboptionsParsedOK);
+    return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+/** \brief Configure the video output driver.
+ *
+ * This functions configures the video output driver. It opens the output
+ * file to which this driver will write all the MD5 sums. If something
+ * goes wrong, the player will exit.
+ *
+ *  \return 0             All went well.
+ */
+
+static uint32_t config(uint32_t width, uint32_t height, uint32_t d_width,
+                       uint32_t d_height, uint32_t fullscreen, char *title,
+                       uint32_t format)
+{
+    if (vo_config_count > 0 ) { /* Already configured */
+        return 0;
+    }
+
+    if ( (md5sum_fd = fopen(md5sum_outfile, "w") ) == NULL ) {
+        mp_msg(MSGT_VO, MSGL_ERR, "\n%s: %s\n", info.short_name,
+                MSGTR_VO_CantCreateFile);
+        mp_msg(MSGT_VO, MSGL_ERR, "%s: %s: %s\n",
+                info.short_name, MSGTR_VO_GenericError, strerror(errno) );
+        exit_player(MSGTR_Exit_error);
+    }
+
+    return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+/** \brief Write MD5 sum to output file.
+ *
+ * This function writes an ASCII representation of a 16-byte hexadecimal
+ * MD5 sum to our output file. The file descriptor is a global variable.
+ *
+ * \param md5sum Sixteen bytes that represent an MD5 sum.
+ *
+ * \return None     The player will exit if a write error occurs.
+ */
+
+static void md5sum_output_sum(unsigned char *md5sum) {
+    int i;
+
+    for(i=0; i<16; i++) {
+        if ( fprintf(md5sum_fd, "%02x", md5sum[i]) < 0 ) md5sum_write_error();
+    }
+    if ( fprintf(md5sum_fd, " frame%08d\n", framenum) < 0 )
+        md5sum_write_error();
+
+    framenum++;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static uint32_t draw_frame(uint8_t *src[])
+{
+    mp_msg(MSGT_VO, MSGL_V, "%s: draw_frame() is called!\n", info.short_name);
+    return -1;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static uint32_t draw_image(mp_image_t *mpi)
+{
+    unsigned char md5sum[16];
+    uint32_t w = mpi->w;
+    uint32_t h = mpi->h;
+    uint8_t *rgbimage = mpi->planes[0];
+    uint8_t *planeY = mpi->planes[0];
+    uint8_t *planeU = mpi->planes[1];
+    uint8_t *planeV = mpi->planes[2];
+    uint32_t strideY = mpi->stride[0];
+    uint32_t strideU = mpi->stride[1];
+    uint32_t strideV = mpi->stride[2];
+
+    auth_md5Ctx md5_context;
+    int i;
+
+    if (mpi->flags & MP_IMGFLAG_PLANAR) { /* Planar */
+        if (mpi->flags & MP_IMGFLAG_YUV) { /* Planar YUV */
+            auth_md5InitCtx(&md5_context);
+            for (i=0; i<h; i++) {
+                auth_md5SumCtx(&md5_context, planeY + i * strideY, w);
+            }
+            w = w / 2;
+            h = h / 2;
+            for (i=0; i<h; i++) {
+                auth_md5SumCtx(&md5_context, planeU + i * strideU, w);
+                auth_md5SumCtx(&md5_context, planeV + i * strideV, w);
+            }
+            auth_md5CloseCtx(&md5_context, md5sum);
+            md5sum_output_sum(md5sum);
+            return VO_TRUE;
+        } else { /* Planar RGB */
+            return VO_FALSE;
+        }
+    } else { /* Packed */
+        if (mpi->flags & MP_IMGFLAG_YUV) { /* Packed YUV */
+            
+            return VO_FALSE;
+        } else { /* Packed RGB */
+            auth_md5Sum(md5sum, rgbimage, mpi->w * (mpi->bpp >> 3) * mpi->h);
+            md5sum_output_sum(md5sum);
+            return VO_TRUE;
+        }
+    }
+
+    return VO_FALSE;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static uint32_t draw_slice(uint8_t *src[], int stride[], int w, int h,
+                           int x, int y)
+{
+    return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static uint32_t query_format(uint32_t format)
+{
+    switch (format) {
+        case IMGFMT_RGB24:
+        case IMGFMT_YV12:
+            return VFCAP_CSP_SUPPORTED|VFCAP_CSP_SUPPORTED_BY_HW;
+        default:
+            return 0;
+    }
+}
+
+/* ------------------------------------------------------------------------- */
+
+static uint32_t control(uint32_t request, void *data, ...)
+{
+    switch (request) {
+        case VOCTRL_QUERY_FORMAT:
+            return query_format(*((uint32_t*)data));
+        case VOCTRL_DRAW_IMAGE:
+            return draw_image(data);
+    }
+    return VO_NOTIMPL;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void uninit(void)
+{
+    if (md5sum_outfile) {
+        free(md5sum_outfile);
+        md5sum_outfile = NULL;
+    }
+    if (md5sum_fd) fclose(md5sum_fd);
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void check_events(void)
+{
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void draw_osd(void)
+{
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void flip_page (void)
+{
+}
+
+/* ------------------------------------------------------------------------- */
+
+#undef BUFLENGTH
+#undef MD5SUM_RGB_MODE
+#undef MD5SUM_YUV_MODE
+
+/* ------------------------------------------------------------------------- */
+