+/* videoreader_vfw.cc
+ Read avi files using Video For Windows (vfw).
+
+ Part of the swftools package.
+
+ Copyright (c) 2004 Matthias Kramm <kramm@quiss.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
+
+#include "videoreader.h"
+#ifdef WIN32
+#include <windows.h>
+#include <vfw.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+typedef struct _videoreader_vfw_internal {
+ //video:
+ PAVISTREAM vs;
+ //audio:
+ PAVISTREAM as;
+
+ PGETFRAME getframe;
+ IAVIFile* avifile;
+ BITMAPINFOHEADER bitmap;
+ WAVEFORMATEX waveformat;
+
+ int audio_eof;
+ int video_eof;
+
+ int video_pos;
+ int video_end;
+
+ int audio_pos;
+ int audio_end;
+
+ float fps;
+ int width,height;
+
+ int samplerate;
+ int channels;
+
+ int flip;
+} videoreader_vfw_internal_t;
+
+static int avifile_initialized = 0;
+static int verbose;
+
+#define _TRACE_ {printf("vfw: %s: %d (%s)\n",__FILE__,__LINE__,__func__);fflush(stdout);}
+
+static int bitmap_to_rgba(BITMAPINFOHEADER*bi, void*buffer, const int dest_width, const int dest_height, int flip)
+{
+ UCHAR*data = (UCHAR*)(bi+1); // actual bitmap data starts after the header
+
+ if(bi->biPlanes!=1 || bi->biCompression!=0 || bi->biBitCount%4!=0) {
+ /* unsupported format */
+ fprintf(stderr, "bitmap_to_rgba: unsupported format: biPlanes=%d, biCompression=%d biBitCount=%d\n",
+ bi->biPlanes, bi->biCompression, bi->biBitCount);
+ return 0;
+ }
+
+ ULONG*dest = (ULONG*)buffer;
+
+ int width = abs(bi->biWidth);
+ int height = abs(bi->biHeight);
+ if(dest_width != width || dest_height != height) {
+ /* TODO: size conversion */
+ fprintf(stderr, "size mismatch: %dx%d != %dx%d\n", width, height, dest_width, dest_height);
+ return 0;
+ }
+
+ /* convert the various image types to RGBA-
+ TODO: is there some way to let the Windows API do this? */
+ int bytesperpixel = ((bi->biWidth*bi->biBitCount)+7)&~7;
+ int linex = ((bytesperpixel/8)+3)&~3;
+ memset(dest, 255, dest_width*dest_height*4);//pre-fill alpha channel
+
+ const int starty = flip? 0 : dest_height-1;
+ const int endy = flip? dest_height : -1;
+ const int yinc = flip? 1 : -1;
+
+ if(verbose) {
+ printf("vfw: Convering scanlines %d to %d from bpp %d, %d stepping, flip=%d\n", starty, endy, bi->biBitCount, yinc, flip);
+ }
+
+ if(bi->biBitCount==1) {
+ UCHAR*img = data;
+ int y;
+ for(y=starty;y!=endy;y+=yinc) {
+ UCHAR*line = &img[linex*y];
+ int x;
+ for(x=0;x<dest_width;x++) {
+ *dest++ = 255*((line[x/8]>>(x&7))&1);
+ }
+ }
+ } else if(bi->biBitCount==4) {
+ UCHAR*img = &data[bi->biClrUsed*4];
+ UCHAR*pal = data;
+ int y;
+ for(y=starty;y!=endy;y+=yinc) {
+ UCHAR*line = &img[linex*y];
+ int x;
+ for(x=0;x<dest_width/2;x++) {
+ *dest++ = 255|pal[(line[0]>>4)<<2|0]<<8|pal[(line[0]>>4)<<2|1]<<16|pal[(line[0]>>4)<<2|2]<<24;
+ *dest++ = 255|pal[(line[0]&0x0f)<<2|0]<<8|pal[(line[0]&0x0f)<<2|1]<<16|pal[(line[0]&0x0f)<<2|2]<<24;
+ line++;
+ }
+ }
+ } else if(bi->biBitCount==8) {
+ UCHAR*img = &data[bi->biClrUsed*4];
+ UCHAR*pal = data;
+ int y;
+ for(y=starty;y!=endy;y+=yinc) {
+ UCHAR*line = &img[linex*y];
+ int x;
+ for(x=0;x<dest_width;x++) {
+ *dest++ = 255|pal[line[0]*4+2]<<8|pal[line[0]*4+1]<<16|pal[line[0]*4+0]<<24;
+ line++;
+ }
+ }
+ } else if(bi->biBitCount==16) {
+ UCHAR*img = data;
+ int y;
+ for(y=starty;y!=endy;y+=yinc) {
+ UCHAR*line = &img[linex*y];
+ int x;
+ for(x=0;x<dest_width;x++) {
+ USHORT c = line[0]|line[1]<<8;
+ *dest++ = 255|(c&0x1f)<<(24+3)|(c>>5&0x1f)<<(16+3)|(c>>10&0x1f)<<(8+3);
+ line+=2;
+ }
+ }
+ } else if(bi->biBitCount==24) {
+ UCHAR*img = data;
+ int y;
+ for(y=starty;y!=endy;y+=yinc) {
+ UCHAR*line = &img[linex*y];
+ int x;
+ for(x=0;x<dest_width;x++) {
+ *dest++ = 255|line[2]<<8|line[1]<<16|line[0]<<24;
+ line+=3;
+ }
+ }
+ } else if(bi->biBitCount==32) {
+ UCHAR*img = data;
+ int y;
+ for(y=starty;y!=endy;y+=yinc) {
+ UCHAR*line = &img[linex*y];
+ int x;
+ for(x=0;x<dest_width;x++) {
+ *dest++ = 255|line[0]<<8|line[1]<<16|line[2]<<24;
+ line+=4;
+ }
+ }
+ } else {
+ fprintf(stderr, "Unsupported format: bitcount=%d\n", bi->biBitCount);
+ return 0;
+ }
+ return 1;
+}
+
+static int videoreader_vfw_getimage(videoreader_t* vr, void*buffer)
+{
+ videoreader_vfw_internal_t* i = (videoreader_vfw_internal_t*)vr->internal;
+
+ if (i->video_pos >= i->video_end)
+ i->video_eof = 1;
+
+ if(i->video_eof)
+ return 0;
+
+ LPBITMAPINFOHEADER bi;
+ bi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(i->getframe, i->video_pos);
+
+ i->video_pos++;
+ vr->frame++;
+
+ if(!bi) {
+ fprintf(stderr, "AVIStreamGetFrame failed\n");
+ return 0;
+ }
+
+ if(!bitmap_to_rgba(bi, buffer, i->width, i->height, i->flip)) {
+ fprintf(stderr, "couldn't convert bitmap to RGBA.\n");
+ return 0;
+ }
+ return i->width*i->height*4;
+}
+
+static int readAudioBlock(videoreader_vfw_internal_t* i, void*buf, int len)
+{
+ LONG bytes;
+ LONG samples;
+ AVIStreamRead(i->as, i->audio_pos, len/(2*i->waveformat.nChannels), buf, len, &bytes, &samples);
+ i->audio_pos += samples;
+ return bytes;
+}
+
+static int videoreader_vfw_getsamples(videoreader_t* vr, void*buf, int num)
+{
+ videoreader_vfw_internal_t* i = (videoreader_vfw_internal_t*)vr->internal;
+
+ if(i->audio_eof)
+ return 0;
+
+ switch(i->waveformat.wBitsPerSample) {
+ case 1: {
+ int len = readAudioBlock(i, buf, num);
+ int t = len-1;
+ do {
+ ((SHORT*)buf)[t] = ((((BYTE*)buf)[t>>3])>>(t&7))<<15;
+ } while(--t>=0);
+ if(!len) i->audio_eof = 1;
+ return len*8;
+ }
+ case 8: {
+ int len = readAudioBlock(i, buf, num);
+ int t = len-1;
+ do {
+ ((SHORT*)buf)[t] = (((BYTE*)buf)[t]<<8)^0x8000;
+ } while(--t>=0);
+ if(!len) i->audio_eof = 1;
+ return len*2;
+ }
+ case 16: {
+ int len = readAudioBlock(i, buf, num);
+ if(!len) i->audio_eof = 1;
+ return len;
+ }
+ default: {
+ return 0;
+ }
+ }
+}
+
+static void videoreader_vfw_close(videoreader_t* vr)
+{
+ videoreader_vfw_internal_t* i = (videoreader_vfw_internal_t*)vr->internal;
+
+ AVIStreamGetFrameClose(i->getframe);
+ if(i->vs) {
+ AVIStreamRelease(i->vs); i->vs = 0;
+ }
+ if(i->as) {
+ AVIStreamRelease(i->as); i->vs = 0;
+ }
+ AVIFileRelease(i->avifile); i->avifile = 0;
+
+ AVIFileExit(); avifile_initialized=0;
+
+ free(vr->internal); vr->internal = 0;
+}
+
+static void videoreader_vfw_setparameter(videoreader_t*vr, char*name, char*value)
+{
+ videoreader_vfw_internal_t* i = (videoreader_vfw_internal_t*)vr->internal;
+ if(!strcmp(name, "flip")) {
+ i->flip = atoi(value);
+ } else if(!strcmp(name, "verbose")) {
+ verbose = atoi(value);
+ }
+}
+
+int videoreader_vfw_open(videoreader_t* vr, char* filename)
+{
+ memset(vr, 0, sizeof(videoreader_t));
+ if(!filename) {
+ /* codec query */
+ return 1;
+ }
+
+ videoreader_vfw_internal_t* i = (videoreader_vfw_internal_t*)malloc(sizeof(videoreader_vfw_internal_t));
+ memset(i, 0, sizeof(videoreader_vfw_internal_t));
+
+ vr->internal = i;
+ vr->getimage = videoreader_vfw_getimage;
+ vr->getsamples = videoreader_vfw_getsamples;
+ vr->close = videoreader_vfw_close;
+ vr->setparameter = videoreader_vfw_setparameter;
+
+ if(!avifile_initialized) {
+ AVIFileInit();
+ }
+ if(AVIFileOpen(&i->avifile, filename, OF_SHARE_DENY_WRITE, 0)) {
+ fprintf(stderr, "Couldn't open %s\n", filename);
+ return -1;
+ }
+ AVIFILEINFO info;
+ AVIFileInfo(i->avifile, &info, sizeof(info));
+
+ /* calculate framerate */
+ i->fps = (double)info.dwRate/(double)info.dwScale;
+
+ if(verbose) {
+ printf("vfw: file %s has %f fps, and %d streams\n", i->fps, info.dwStreams);
+ }
+
+ unsigned int t=0;
+ while(t<info.dwStreams) {
+ PAVISTREAM stream;
+ if(AVIFileGetStream(i->avifile, &stream, streamtypeANY, t) != AVIERR_OK || !stream)
+ break; //video_end of (working) streams
+
+ AVISTREAMINFO streaminfo;
+ AVIStreamInfo(stream, &streaminfo, sizeof(streaminfo));
+
+ if (streaminfo.fccType == streamtypeVIDEO) {
+ /* video stream */
+
+ BITMAPINFOHEADER bitmap;
+ LONG size = sizeof(bitmap);
+ AVIStreamReadFormat(stream, 0, &bitmap, &size);
+
+ if(1) {
+ i->bitmap = bitmap;
+ i->vs = stream;
+ i->width = abs(bitmap.biWidth);
+ i->height = abs(bitmap.biHeight);
+ } else {
+ fprintf(stderr, "Ignoring video stream: %dx%d compression=%d planes=%d\n",
+ abs(bitmap.biWidth), abs(bitmap.biHeight),
+ bitmap.biCompression,bitmap.biPlanes);
+ }
+ }
+ else if (streaminfo.fccType == streamtypeAUDIO) {
+ /* audio stream */
+
+ WAVEFORMATEX waveformat;
+ LONG size = sizeof(waveformat);
+ AVIStreamReadFormat(stream, 0, &waveformat, &size);
+
+ if(waveformat.wBitsPerSample == 16 ||
+ waveformat.wBitsPerSample == 8 ||
+ waveformat.wBitsPerSample == 1
+ ) {
+ i->waveformat = waveformat;
+ i->as = stream;
+ i->channels = waveformat.nChannels;
+ i->samplerate = waveformat.nSamplesPerSec;
+ } else {
+ fprintf(stderr, "Ignoring audio stream: bitspersample=%d\n", waveformat.wBitsPerSample);
+ }
+ }
+ t++;
+ }
+
+ if(i->vs) {
+ if(verbose) {
+ printf("vfw: video stream: %dx%d, %.2f\n", i->width, i->height, i->fps);
+ }
+ vr->width = i->width;
+ vr->height = i->height;
+ vr->fps = i->fps;
+ } else {
+ fprintf(stderr, "AVIReader: Warning: No video stream\n");
+ }
+ if(i->as) {
+ if(verbose) {
+ printf("vfw: audio stream: %d channels, %d samples/sec", i->channels, i->samplerate);
+ }
+ vr->channels = i->channels;
+ vr->samplerate = i->samplerate;
+ } else {
+ fprintf(stderr, "AVIReader: Warning: No audio stream\n");
+ }
+
+ i->getframe = AVIStreamGetFrameOpen(i->vs, 0);
+ if(!i->getframe) {
+ fprintf(stderr, "Couldn't initialize AVIStream for %s- codec missing?\n", filename);
+ return -1;
+ }
+
+ i->video_pos = AVIStreamStart(i->vs);
+ i->video_end = AVIStreamEnd(i->vs);
+ i->audio_pos = 0;
+ i->audio_end = 0x7fffffff;
+
+ return 0;
+}
+
+#else //WIN32
+
+int videoreader_vfw_open(videoreader_t* vr, char* filename)
+{
+ return -1;
+}
+
+#endif //WIN32
+
git.asbjorn.biz / swftools.git / blobdiff