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#include
#include
#include
#include
#include
#include
#include "xvid.h"
#define USE_PNM 1
#define USE_TGA 0
static int SHXDIM = 0;//display size
static int SHYDIM = 0;
static int XDIM = 352;//real size
static int YDIM = 288;
static int ARG_SAVEDECOUTPUT = 0;
static int ARG_SAVEMPEGSTREAM = 0;
static char *ARG_INPUTFILE = NULL;
static int CSP = XVID_CSP_I420;
static int BPP = 1;
static int FORMAT = USE_PNM;
static char filepath[256] = "./";
static void *dec_handle = NULL;
#define BUFFER_SIZE (2*1024*1024)
static const int display_buffer_bytes = 0;
static SDL_Surface *screen;
static SDL_Overlay *overlay;
static SDL_Rect rect;
static double msecond();
static int dec_init(int use_assembler, int debug_level);
static int dec_main(unsigned char *istream,
unsigned char *ostream,
int istream_size,
xvid_dec_stats_t *xvid_dec_stats);
static int dec_stop();
static void usage();
static int write_image(char *prefix, unsigned char *image);
static int write_pnm(char *filename, unsigned char *image);
static int write_tga(char *filename, unsigned char *image);
const char * type2str(int type)
{
if (type==XVID_TYPE_IVOP)
return "I";
if (type==XVID_TYPE_PVOP)
return "P";
if (type==XVID_TYPE_BVOP)
return "B";
return "S";
}
static void init_SDL()
{
if (SDL_Init (SDL_INIT_VIDEO) flags & SDL_HWSURFACE)
{
fprintf(stderr,"Can't get hardware surface\n");
exit(3);
}
SDL_WM_SetCaption ("SDL MultiMedia Application", NULL);
overlay = SDL_CreateYUVOverlay(XDIM, YDIM, SDL_YV12_OVERLAY, screen);
if (!overlay)
{
fprintf(stderr, "Couldn't create overlay: %s\n", SDL_GetError());
exit(4);
}
//show the overlay status
printf("Created %dx%dx%d %s %s overlay\n",overlay->w,overlay->h,overlay->planes,
overlay->hw_overlay?"hardware":"software",
overlay->format==SDL_YV12_OVERLAY?"YV12":
overlay->format==SDL_IYUV_OVERLAY?"IYUV":
overlay->format==SDL_YUY2_OVERLAY?"YUY2":
overlay->format==SDL_UYVY_OVERLAY?"UYVY":
overlay->format==SDL_YVYU_OVERLAY?"YVYU":
"Unknown");
rect.x=0;
rect.y=0;
rect.w=SHXDIM;
rect.h=SHYDIM;
}
int main(int argc, char *argv[])
{
SDL_Event event;
uint32_t lastftick;
unsigned char *mp4_buffer = NULL;
unsigned char *mp4_ptr = NULL;
unsigned char *out_buffer = NULL;
int useful_bytes;
xvid_dec_stats_t xvid_dec_stats;
double totaldectime;
long totalsize;
int status;
int fps = 25;
int fpsdelay;
int paused=0;
int resized=0;
int use_assembler = 1;
int debug_level = 0;
char filename[256];
FILE *in_file;
int filenr;
int i;
for (i=1; i
/* PNM/PGM format can't handle 16/32 bit data */
if (BPP != 1 && BPP != 3 && FORMAT == USE_PNM) {
FORMAT = USE_TGA;
}
/* Memory for encoded mp4 stream */
mp4_buffer = (unsigned char *) malloc(BUFFER_SIZE);
if (!mp4_buffer)
goto free_all_memory;
out_buffer = (unsigned char *)malloc(XDIM*YDIM*3/2);
if (!out_buffer)
goto free_all_memory;
/******************************************************************************
* INIT SDL
*******************************************************************************/
init_SDL();
/*****************************************************************************
* XviD PART Start
****************************************************************************/
status = dec_init(use_assembler, debug_level);
if (status) {
fprintf(stderr,
"Decore INIT problem, return value %d\n", status);
goto release_all;
}
/*****************************************************************************
* Main loop
****************************************************************************/
/* Fill the buffer ,create 2M buffer*/
useful_bytes = fread(mp4_buffer, 1, BUFFER_SIZE, in_file);
totaldectime = 0;
totalsize = 0;
filenr = 0;
mp4_ptr = mp4_buffer;
uint8_t *outy,*outu,*outv,*op[3];
int y;
/* set the start frame */
i=0;
fpsdelay=1000/fps;
lastftick=SDL_GetTicks();
do
{
int used_bytes = 0;
double dectime;
while (SDL_PollEvent(&event))
{
switch (event.type)
{
case SDL_VIDEORESIZE:
screen=SDL_SetVideoMode(event.resize.w, event.resize.h, 0, SDL_RESIZABLE | SDL_SWSURFACE);
rect.w=event.resize.w;
rect.h=event.resize.h;
if (paused)
{
resized=1;
}
break;
case SDL_KEYDOWN:
if (event.key.keysym.sym == SDLK_SPACE)
{
paused=!paused;
break;
}
if (event.key.keysym.sym != SDLK_ESCAPE)
{
goto release_all;
}
case SDL_QUIT:
goto release_all;
}
}
/*
* If the buffer is half empty or there are no more bytes in it
* then fill it.
*/
if (mp4_ptr > mp4_buffer + BUFFER_SIZE/2)
{
int already_in_buffer = (mp4_buffer + BUFFER_SIZE - mp4_ptr);
/* Move data if needed */
if (already_in_buffer > 0)
memcpy(mp4_buffer, mp4_ptr, already_in_buffer);
/* Update mp4_ptr */
mp4_ptr = mp4_buffer;
/* read new data */
if(feof(in_file))
break;
useful_bytes += fread(mp4_buffer + already_in_buffer,
1, BUFFER_SIZE - already_in_buffer,
in_file);
}
if ((!paused)||(resized))
{
if (((SDL_GetTicks()-lastftick)>fpsdelay)||(resized))
{
lastftick=SDL_GetTicks();
/* This loop is needed to handle VOL/NVOP reading */
do{
/* Decode frame */
dectime = msecond();
used_bytes = dec_main(mp4_ptr, out_buffer, useful_bytes, &xvid_dec_stats);
dectime = msecond() - dectime;
if(xvid_dec_stats.type==XVID_TYPE_VOL
&& (xvid_dec_stats.data.vol.width != XDIM
||xvid_dec_stats.data.vol.height != YDIM))
{
//reallocate bigger out frame
free(out_buffer);
XDIM = xvid_dec_stats.data.vol.width;
YDIM = xvid_dec_stats.data.vol.height;
out_buffer = (unsigned char *) malloc(XDIM*YDIM*3/2);
if (!out_buffer)
goto free_all_memory;
//reallocate bigger yuv overlay
SDL_FreeYUVOverlay(overlay);
overlay = SDL_CreateYUVOverlay(XDIM, YDIM, SDL_YV12_OVERLAY, screen);
if (!overlay)
{
fprintf(stderr, "Couldn't create overlay: %s\n", SDL_GetError());
exit(4);
}
}
/* Update buffer pointers */
if(used_bytes > 0) {
mp4_ptr += used_bytes;
useful_bytes -= used_bytes;
/* Total size */
totalsize += used_bytes;
}
}while (xvid_dec_stats.type 0);
/* Check if there is a negative number of useful bytes left in buffer
* This means we went too far */
if(useful_bytes h && yh;y++)
{
op[0]=overlay->pixels[0]+overlay->pitches[0]*y;
op[1]=overlay->pixels[1]+overlay->pitches[1]*(y/2);
op[2]=overlay->pixels[2]+overlay->pitches[2]*(y/2);
memcpy(op[0],outy+y*XDIM,XDIM);
if(y%2 == 0)
{
memcpy(op[1],outu+XDIM/2*y/2,XDIM/2);
memcpy(op[2],outv+XDIM/2*y/2,XDIM/2);
}
}
SDL_UnlockYUVOverlay(overlay);
SDL_UnlockSurface(screen);
SDL_DisplayYUVOverlay(overlay, &rect);
/* Save output frame if required */
if (ARG_SAVEDECOUTPUT) {
sprintf(filename, "%sdec%05d", filepath, filenr);
if(write_image(filename, out_buffer)) {
fprintf(stderr,
"Error writing decoded frame %s\n",
filename);
}
}
filenr++;
if (resized)
resized = 0;
}
}
SDL_Delay(10);
} while (useful_bytes>0 || !feof(in_file));
useful_bytes = 0; /* Empty buffer */
/*****************************************************************************
* Flush decoder buffers
****************************************************************************/
do {
/* Fake vars */
int used_bytes;
double dectime;
do {
dectime = msecond();
used_bytes = dec_main(NULL, out_buffer, -1, &xvid_dec_stats);
dectime = msecond() - dectime;
} while(used_bytes>=0 && xvid_dec_stats.type
if (used_bytes
/* Updated data - Count only usefull decode time */
totaldectime += dectime;
/* Prints some decoding stats */
if (!display_buffer_bytes) {
printf("Frame %5d: type = %s, dectime(ms) =%6.1f, length(bytes) =%7d\n",
filenr, type2str(xvid_dec_stats.type), dectime, used_bytes);
}
/* Save output frame if required */
if (ARG_SAVEDECOUTPUT) {
sprintf(filename, "%sdec%05d", filepath, filenr);
if(write_image(filename, out_buffer)) {
fprintf(stderr,
"Error writing decoded frame %s\n",
filename);
}
}
filenr++;
}while(1);
/*****************************************************************************
* Calculate totals and averages for output, print results
****************************************************************************/
if (filenr>0) {
totalsize /= filenr;
totaldectime /= filenr;
printf("Avg: dectime(ms) =%7.2f, fps =%7.2f, length(bytes) =%7d\n",
totaldectime, 1000/totaldectime, (int)totalsize);
}else{
printf("Nothing was decoded!\n");
}
/*****************************************************************************
* XviD PART Stop
****************************************************************************/
release_all:
SDL_FreeYUVOverlay(overlay);
if (dec_handle) {
status = dec_stop();
if (status)
fprintf(stderr, "decore RELEASE problem return value %d\n", status);
}
free_all_memory:
free(out_buffer);
free(mp4_buffer);
return 0;
}
/*****************************************************************************
* Usage function
****************************************************************************/
static void usage()
{
fprintf(stderr, "Usage : xvid_decraw [OPTIONS]\n");
fprintf(stderr, "Options :\n");
fprintf(stderr, " -asm : use assembly optimizations (default=disabled)\n");
fprintf(stderr, " -i string : input filename (default=stdin)\n");
fprintf(stderr, " -d : save decoder output\n");
fprintf(stderr, " -f format : choose output file format (tga, pnm, pgm)\n");
fprintf(stderr, " -w width : init window width\n");
fprintf(stderr, " -h height : init window height\n");
fprintf(stderr, " -help : This help message\n");
fprintf(stderr, " (* means default)\n");
}
/* return the current time in milli seconds */
static double
msecond()
{
clock_t clk;
clk = clock();
return(clk * 1000 / CLOCKS_PER_SEC);
}
static int write_image(char *prefix, unsigned char *image)
{
char filename[1024];
char *ext;
int ret;
if (FORMAT == USE_PNM && BPP == 1) {
ext = "pgm";
} else if (FORMAT == USE_PNM && BPP == 3) {
ext = "pnm";
} else if (FORMAT == USE_TGA) {
ext = "tga";
} else {
fprintf(stderr, "Bug: should not reach this path code -- please report to
xvid-devel@xvid.org
with command line options used");
exit(-1);
}
sprintf(filename, "%s.%s", prefix, ext);
if (FORMAT == USE_PNM) {
ret = write_pnm(filename, image);
} else {
ret = write_tga(filename, image);
}
return(ret);
}
static int write_tga(char *filename, unsigned char *image)
{
FILE * f;
char hdr[18];
f = fopen(filename, "wb");
if ( f == NULL) {
return -1;
}
hdr[0] = 0; /* ID length */
hdr[1] = 0; /* Color map type */
hdr[2] = (BPP>1)?2:3; /* Uncompressed true color (2) or greymap (3) */
hdr[3] = 0; /* Color map specification (not used) */
hdr[4] = 0; /* Color map specification (not used) */
hdr[5] = 0; /* Color map specification (not used) */
hdr[6] = 0; /* Color map specification (not used) */
hdr[7] = 0; /* Color map specification (not used) */
hdr[8] = 0; /* LSB X origin */
hdr[9] = 0; /* MSB X origin */
hdr[10] = 0; /* LSB Y origin */
hdr[11] = 0; /* MSB Y origin */
hdr[12] = (XDIM>>0)&0xff; /* LSB Width */
hdr[13] = (XDIM>>8)&0xff; /* MSB Width */
if (BPP > 1) {
hdr[14] = (YDIM>>0)&0xff; /* LSB Height */
hdr[15] = (YDIM>>8)&0xff; /* MSB Height */
} else {
hdr[14] = ((YDIM*3)>>1)&0xff; /* LSB Height */
hdr[15] = ((YDIM*3)>>9)&0xff; /* MSB Height */
}
hdr[16] = BPP*8;
hdr[17] = 0x00 | (1
/* write first plane */
fwrite(image, 1, XDIM*YDIM*BPP, f);
/* Write Y and V planes for YUV formats */
if (BPP == 1) {
int i;
/* Write the two chrominance planes */
for (i=0; i
/* Close the file */
fclose(f);
return(0);
}
static int write_pnm(char *filename, unsigned char *image)
{
FILE * f;
f = fopen(filename, "wb");
if ( f == NULL) {
return -1;
}
if (BPP == 1) {
int i;
fprintf(f, "P5\n#xvid\n%i %i\n255\n", XDIM, YDIM*3/2);
fwrite(image, 1, XDIM*YDIM, f);
for (i=0; i
fclose(f);
return 0;
}
/*****************************************************************************
* Routines for decoding: init decoder, use, and stop decoder
****************************************************************************/
/* init decoder before first run */
static int
dec_init(int use_assembler, int debug_level)
{
int ret;
xvid_gbl_init_t xvid_gbl_init;
xvid_dec_create_t xvid_dec_create;
/* Reset the structure with zeros */
memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init_t));
memset(&xvid_dec_create, 0, sizeof(xvid_dec_create_t));
/*------------------------------------------------------------------------
* XviD core initialization
*----------------------------------------------------------------------*/
/* Version */
xvid_gbl_init.version = XVID_VERSION;
/* Assembly setting */
if(use_assembler)
xvid_gbl_init.cpu_flags = 0;
else
xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
xvid_gbl_init.debug = debug_level;
xvid_global(NULL, 0, &xvid_gbl_init, NULL);
/*------------------------------------------------------------------------
* XviD encoder initialization
*----------------------------------------------------------------------*/
/* Version */
xvid_dec_create.version = XVID_VERSION;
/*
* Image dimensions -- set to 0, xvidcore will resize when ever it is
* needed
*/
xvid_dec_create.width = 0;
xvid_dec_create.height = 0;
ret = xvid_decore(NULL, XVID_DEC_CREATE, &xvid_dec_create, NULL);
dec_handle = xvid_dec_create.handle;
return(ret);
}
/* decode one frame */
static int
dec_main(unsigned char *istream,
unsigned char *ostream,
int istream_size,
xvid_dec_stats_t *xvid_dec_stats)
{
int ret;
xvid_dec_frame_t xvid_dec_frame;
/* Reset all structures */
memset(&xvid_dec_frame, 0, sizeof(xvid_dec_frame_t));
memset(xvid_dec_stats, 0, sizeof(xvid_dec_stats_t));
/* Set version */
xvid_dec_frame.version = XVID_VERSION;
xvid_dec_stats->version = XVID_VERSION;
/* No general flags to set */
xvid_dec_frame.general = 0;
/* Input stream */
xvid_dec_frame.bitstream = istream;
xvid_dec_frame.length = istream_size;
/* Output frame structure */
xvid_dec_frame.output.plane[0] = ostream;
xvid_dec_frame.output.stride[0] = XDIM*BPP;
xvid_dec_frame.output.csp = CSP;
ret = xvid_decore(dec_handle, XVID_DEC_DECODE, &xvid_dec_frame, xvid_dec_stats);
return(ret);
}
/* close decoder to release resources */
static int
dec_stop()
{
int ret;
ret = xvid_decore(dec_handle, XVID_DEC_DESTROY, NULL, NULL);
return(ret);
}
本文来自CSDN博客，转载请标明出处：
http://blog.csdn.net/dog0138/archive/2007/03/15/1530779.aspx
本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u3/99873/showart_2069830.html |
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发表于 2009-10-14 00:13