Initial revision

git-svn-id: svn://svn.icculus.org/twilight/trunk/dpvideo@2070 d7cf8633-e32d-0410-b094-e92efae38249

Author: ladyhavoc

dpvdecode.c

@@ -0,0 +1,68 @@
+
+#ifndef DPVDECODE_H
+#define DPVDECODE_H
+
+#define DPVDECODEERROR_NONE 0
+#define DPVDECODEERROR_EOF 1
+#define DPVDECODEERROR_READERROR 2
+#define DPVDECODEERROR_SOUNDBUFFERTOOSMALL 3
+#define DPVDECODEERROR_INVALIDRMASK 4
+#define DPVDECODEERROR_INVALIDGMASK 5
+#define DPVDECODEERROR_INVALIDBMASK 6
+#define DPVDECODEERROR_COLORMASKSOVERLAP 7
+#define DPVDECODEERROR_COLORMASKSEXCEEDBPP 8
+#define DPVDECODEERROR_UNSUPPORTEDBPP 9
+
+// opening and closing streams
+
+// opens a stream
+void *dpvdecode_open(char *filename, char **errorstring);
+// closes a stream
+void dpvdecode_close(void *stream);
+
+// utilitarian functions
+
+// returns the current error number for the stream, and resets the error
+// number to DPVDECODEERROR_NONE
+// if the supplied string pointer variable is not NULL, it will be set to the
+// error message
+int dpvdecode_error(void *stream, char **errorstring);
+
+// retrieve frame number for given time
+int dpvdecode_framefortime(void *stream, double t);
+
+// return the total number of frames in the stream
+unsigned int dpvdecode_gettotalframes(void *stream);
+
+// return the total time of the stream
+double dpvdecode_gettotaltime(void *stream);
+
+// returns the width of the image data
+unsigned int dpvdecode_getwidth(void *stream);
+
+// returns the height of the image data
+unsigned int dpvdecode_getheight(void *stream);
+
+// returns the sound sample rate of the stream
+unsigned int dpvdecode_getsoundrate(void *stream);
+
+// returns the framerate of the stream
+double dpvdecode_getframerate(void *stream);
+
+// returns a recommended sound buffer length (in samples)
+// for decoding a single frame of this stream
+unsigned int dpvdecode_getneededsoundbufferlength(void *stream);
+
+// decodes a frame, both video and audio, to the supplied buffers
+// can produce many different possible errors
+// (such as too little space in supplied sound buffer)
+// (note: sound is 16bit stereo native-endian, left channel first)
+//int dpvdecode_frame(void *stream, int framenum, void *imagedata, unsigned int Rmask, unsigned int Gmask, unsigned int Bmask, unsigned int bytesperpixel, int imagebytesperrow, short *sounddata, unsigned int soundbufferlength, unsigned int *soundlength);
+
+// decodes a video frame to the supplied output pixels
+int dpvdecode_video(void *stream, int framenum, void *imagedata, unsigned int Rmask, unsigned int Gmask, unsigned int Bmask, unsigned int bytesperpixel, int imagebytesperrow);
+// reads some sound
+// (note: sound is 16bit stereo native-endian, left channel first)
+int dpvdecode_audio(void *stream, int firstsample, short *soundbuffer, int requestedlength);
+
+#endif

dpvdecode.h

@@ -0,0 +1,114 @@
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include "dpvdecode.h"
+#include "tgafile.h"
+
+void Error (char *message, ...)
+{
+	va_list argptr;
+
+	puts("ERROR: ");
+
+	va_start (argptr,message);
+	vprintf (message,argptr);
+	va_end (argptr);
+	putchar('\n');
+#if _DEBUG && WIN32
+	printf ("press a key\n");
+	getchar();
+#endif
+	exit (1);
+}
+
+void StripExtension(char *in, char *out)
+{
+	char *dot;
+	dot = strrchr(in, '.');
+	if (dot)
+	{
+		if (dot < strrchr(in, '/'))
+			dot = NULL;
+		if (dot < strrchr(in, '\\'))
+			dot = NULL;
+		if (dot < strrchr(in, ':'))
+			dot = NULL;
+	}
+	if (dot == NULL)
+		dot = in + strlen(in);
+	while (in < dot)
+		*out++ = *in++;
+	*out++ = 0;
+}
+
+
+void usage(void)
+{
+	printf(
+"usage: dpvdecoder <name>\n"
+"example:\n"
+"dpvdecoder test\n"
+"would save out all the frames of test.dpv as test00000.tga, test00001.tga\n"
+"and so on, and save out the sound as test.wav\n"
+	);
+}
+
+int main(int argc, char **argv)
+{
+	int errornum;
+	int width, height/*, soundbufferlength, soundlength*/, framenum;
+	void *imagedata;
+	//short *sounddata;
+	char *errormessage;
+	void *stream;
+	char *basename;
+	char filename[1024];
+	char framename[1024];
+	char wavname[1024];
+	if (argc != 2)
+	{
+		usage();
+		return 1;
+	}
+	basename = argv[1];
+
+	sprintf(filename, "%s.dpv", basename);
+	stream = dpvdecode_open(filename, &errormessage);
+	if (stream == NULL)
+	{
+		printf("unable to open stream file \"%s\", file does not exist or is not a valid stream\ndpvdecode_error reported: %s\n", filename, errormessage);
+
+		strcpy(filename, basename);
+		StripExtension(basename, basename);
+		stream = dpvdecode_open(filename, &errormessage);
+		if (stream == NULL)
+		{
+			printf("unable to open stream file \"%s\", file does not exist or is not a valid stream\ndpvdecode_error reported: %s\n", filename, errormessage);
+			return 1;
+		}
+	}
+
+	sprintf(wavname, "%s.wav", basename);
+	// FIXME: write wav save code
+	errornum = 0;
+	width = dpvdecode_getwidth(stream);
+	height = dpvdecode_getheight(stream);
+	//soundbufferlength = dpvdecode_getneededsoundbufferlength(stream);
+	imagedata = malloc(width * height * 4);
+	//sounddata = malloc(soundlength * sizeof(short[2]));
+	for (framenum = 0;;framenum++)
+	{
+		//dpvdecode_frame(stream, framenum, imagedata, 0xFF0000, 0x00FF00, 0x0000FF, 4, width * 4, sounddata, soundbufferlength, &soundlength);
+		dpvdecode_video(stream, framenum, imagedata, 0xFF0000, 0x00FF00, 0x0000FF, 4, width * 4);
+		if (dpvdecode_error(stream, &errormessage))
+			break;
+		sprintf(framename, "%s%04d.tga", basename, framenum);
+		savetga_rgb32_topdown(framename, imagedata, width, height);
+	}
+	if (errornum)
+		printf("error while decoding stream: %s\n", errormessage);
+	dpvdecode_close(stream);
+	return 0;
+}