diff options
Diffstat (limited to 'converter/ppm/ppmtompeg/readframe.c')
| -rw-r--r-- | converter/ppm/ppmtompeg/readframe.c | 103 |
1 files changed, 53 insertions, 50 deletions
diff --git a/converter/ppm/ppmtompeg/readframe.c b/converter/ppm/ppmtompeg/readframe.c index 2a359b2f..dcc02052 100644 --- a/converter/ppm/ppmtompeg/readframe.c +++ b/converter/ppm/ppmtompeg/readframe.c @@ -1,13 +1,13 @@ /*===========================================================================* - * readframe.c - * - * procedures to read in frames - * - * EXPORTED PROCEDURES: - * ReadFrame - * SetFileType - * SetFileFormat - * + * readframe.c + * + * procedures to read in frames + * + * EXPORTED PROCEDURES: + * ReadFrame + * SetFileType + * SetFileFormat + * *===========================================================================*/ /* COPYRIGHT INFORMATION IS AT THE END OF THIS FILE */ @@ -62,7 +62,7 @@ struct YuvLine { #ifdef __OS2__ #define popen _popen #endif - + /*==================* * Global VARIABLES * @@ -100,7 +100,7 @@ static void DoKillDim (MpegFrame *mf, int w, int h); -void +void SetResize(bool const set) { resizeFrame = set; } @@ -134,7 +134,7 @@ ReadPNM(MpegFrame * const mpegFrameP, static void openFile(struct inputSource * const inputSourceP, unsigned int const frameNumber, - const char * const conversion, + const char * const conversion, FILE ** const ifPP) { if (inputSourceP->stdinUsed) { @@ -145,24 +145,24 @@ openFile(struct inputSource * const inputSourceP, "INPUT_CONVERTER * in the parameter file or supply the " "frames in files by specifying a directory with " "INPUT_DIRECTORY in the parameter file."); - + *ifPP = stdin; } else { const char * fileName; const char * fullFileName; - + GetNthInputFileName(inputSourceP, frameNumber, &fileName); - + pm_asprintf(&fullFileName, "%s/%s", currentPath, fileName); - + CurrFile = fullFileName; - + if (fileType == ANY_FILE_TYPE) { char command[1024]; const char * convertPtr; char * commandPtr; const char * charPtr; - + /* replace every occurrence of '*' with fullFileName */ convertPtr = conversion; commandPtr = command; @@ -172,7 +172,7 @@ openFile(struct inputSource * const inputSourceP, ++commandPtr; ++convertPtr; } - + if (*convertPtr == '*') { /* copy fullFileName */ charPtr = fullFileName; @@ -185,7 +185,7 @@ openFile(struct inputSource * const inputSourceP, } } *commandPtr = '\0'; - + *ifPP = popen(command, "r"); if (*ifPP == NULL) { pm_message( @@ -201,7 +201,7 @@ openFile(struct inputSource * const inputSourceP, *ifPP = fopen(fullFileName, "rb"); if (*ifPP == NULL) pm_error("Couldn't open input file '%s'", fullFileName); - + if (baseFormat == JMOVIE_FILE_TYPE) unlink(fullFileName); } @@ -238,7 +238,7 @@ fileIsAtEnd(FILE * const ifP) { c = getc(ifP); if (c == EOF) { - if (feof(ifP)) + if (feof(ifP)) eof = TRUE; else pm_error("File error on getc() to position to image"); @@ -248,7 +248,7 @@ fileIsAtEnd(FILE * const ifP) { eof = FALSE; rc = ungetc(c, ifP); - if (rc == EOF) + if (rc == EOF) pm_error("File error doing ungetc() to position to image."); } return eof; @@ -262,14 +262,11 @@ ReadFrameFile(MpegFrame * const frameP, const char * const conversion, bool * const eofP) { /*---------------------------------------------------------------------------- - Read a frame from the file 'ifP'. + Read a frame from the file 'ifP', doing adjustments as indicated. Return *eofP == TRUE iff we encounter EOF before we can get the frame. -----------------------------------------------------------------------------*/ - MpegFrame tempFrame; - MpegFrame * framePtr; - /* To make this code fit Netpbm properly, we should remove handling of all types except PNM and use pm_nextimage() to handle sensing of end of stream. @@ -278,53 +275,59 @@ ReadFrameFile(MpegFrame * const frameP, if (fileIsAtEnd(ifP)) *eofP = TRUE; else { + MpegFrame preResizeFrame; + /* The frame object that holds the frame before resizing */ + MpegFrame * rawFrameP; + /* The frame object with which we read in the raw frame */ + *eofP = FALSE; if (resizeFrame) { - tempFrame.inUse = FALSE; - tempFrame.orig_y = NULL; - tempFrame.y_blocks = NULL; - tempFrame.decoded_y = NULL; - tempFrame.halfX = NULL; - framePtr = &tempFrame; + preResizeFrame.inUse = FALSE; + preResizeFrame.orig_y = NULL; + preResizeFrame.y_blocks = NULL; + preResizeFrame.decoded_y = NULL; + preResizeFrame.halfX = NULL; + rawFrameP = &preResizeFrame; } else - framePtr = frameP; + rawFrameP = frameP; switch(baseFormat) { case YUV_FILE_TYPE: /* Encoder YUV */ if ((strncmp (yuvConversion, "EYUV", 4) == 0) || - (strncmp (yuvConversion, "UCB", 3) == 0)) + (strncmp (yuvConversion, "UCB", 3) == 0)) - ReadEYUV(framePtr, ifP, realWidth, realHeight); + ReadEYUV(rawFrameP, ifP, realWidth, realHeight); else /* Abekas-type (interlaced) YUV */ - ReadAYUV(framePtr, ifP, realWidth, realHeight); + ReadAYUV(rawFrameP, ifP, realWidth, realHeight); break; case Y_FILE_TYPE: - ReadY(framePtr, ifP, realWidth, realHeight); + ReadY(rawFrameP, ifP, realWidth, realHeight); break; case PNM_FILE_TYPE: - ReadPNM(framePtr, ifP); + ReadPNM(rawFrameP, ifP); break; case SUB4_FILE_TYPE: - ReadSub4(framePtr, ifP, yuvWidth, yuvHeight); + ReadSub4(rawFrameP, ifP, yuvWidth, yuvHeight); break; case JPEG_FILE_TYPE: case JMOVIE_FILE_TYPE: - ReadJPEG(framePtr, ifP); + ReadJPEG(rawFrameP, ifP); break; default: break; } - if (resizeFrame) - Frame_Resize(frameP, &tempFrame, Fsize_x, Fsize_y, + if (resizeFrame) { + assert(rawFrameP == &preResizeFrame); + Frame_Resize(frameP, &preResizeFrame, Fsize_x, Fsize_y, outputWidth, outputHeight); - + } if (GammaCorrection) DoGamma(frameP, Fsize_x, Fsize_y); @@ -338,7 +341,7 @@ ReadFrameFile(MpegFrame * const frameP, void -ReadFrame(MpegFrame * const frameP, +ReadFrame(MpegFrame * const frameP, struct inputSource * const inputSourceP, unsigned int const frameNumber, const char * const conversion, @@ -693,7 +696,7 @@ SeparateLine(fpointer, lineptr, width) fprintf(stderr, " or any even-length string consisting of the letters U, V, and Y.\n"); exit(1); } - + } } @@ -738,7 +741,7 @@ ReadY(mf, fpointer, width, height) for (y = Fsize_y; y < height; y++) { safe_fread(junk, 1, width, fpointer); } - + for (y = 0 ; y < (Fsize_y >> 1); y++) { memset(mf->orig_cb[y], 128, (Fsize_x>>1)); memset(mf->orig_cr[y], 128, (Fsize_x>>1)); @@ -830,7 +833,7 @@ int w,h; int i,j; if (!init_done) { - for(i=0; i<256; i++) + for(i=0; i<256; i++) GammaVal[i]=(unsigned char) (pow(((double) i)/255.0,GammaValue)*255.0+0.5); init_done=TRUE; } @@ -871,7 +874,7 @@ int w,h; ^ kill_dim_break ^kill_dim_end kill_dim_slope gives the slope (y = kill_dim_slope * x +0) - from 0 to kill_dim_break + from 0 to kill_dim_break * *===========================================================================*/ @@ -930,7 +933,7 @@ int w,h; * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. */ -/* +/* * $Header: /n/picasso/project/mpeg/mpeg_dist/mpeg_encode/RCS/readframe.c,v 1.27 1995/08/14 22:31:40 smoot Exp $ * $Log: readframe.c,v $ * Revision 1.27 1995/08/14 22:31:40 smoot |