cxvid.c

用于Linux下的网络视频。包里包括了接收端和发送端。大部份是从Spcaview修改过来的

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
 
 
#include "xvid.h"
#define FRAMERATE_INCR 1001
#define SMALL_EPS (1e-10)
#define IMAGE_SIZE(x,y) ((x)*(y)*3/2)
 
 
 
#define UNOW 1
 
#define WIDTH 352
#define HEIGHT 288
#define BPPIN 8
 
static float ARG_FRAMERATE = 25.00f;
static int ARG_QUALITY = 4;
static int ARG_MAXKEYINTERVAL = 250;
static int use_assembler = 0;
static void *enc_handle = NULL;
 
static const int motion_presets[] = {
    /* quality 0 */
    0,
 
    /* quality 1 */
    XVID_ME_ADVANCEDDIAMOND16,
 
    /* quality 2 */
    XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16,
 
    /* quality 3 */
    XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16 |
    XVID_ME_ADVANCEDDIAMOND8 | XVID_ME_HALFPELREFINE8,
 
    /* quality 4 */
    XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16 |
    XVID_ME_ADVANCEDDIAMOND8 | XVID_ME_HALFPELREFINE8 |
    XVID_ME_CHROMA_PVOP | XVID_ME_CHROMA_BVOP,
 
    /* quality 5 */
    XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16 |
    XVID_ME_ADVANCEDDIAMOND8 | XVID_ME_HALFPELREFINE8 |
    XVID_ME_CHROMA_PVOP | XVID_ME_CHROMA_BVOP,
 
    /* quality 6 */
    XVID_ME_ADVANCEDDIAMOND16 | XVID_ME_HALFPELREFINE16 | XVID_ME_EXTSEARCH16 |
    XVID_ME_ADVANCEDDIAMOND8 | XVID_ME_HALFPELREFINE8 | XVID_ME_EXTSEARCH8 |
    XVID_ME_CHROMA_PVOP | XVID_ME_CHROMA_BVOP,
 
};
static const int vop_presets[] = {
    /* quality 0 */
    0,
 
    /* quality 1 */
    0,
 
    /* quality 2 */
    XVID_VOP_HALFPEL,
 
    /* quality 3 */
    XVID_VOP_HALFPEL | XVID_VOP_INTER4V,
 
    /* quality 4 */
    XVID_VOP_HALFPEL | XVID_VOP_INTER4V,
 
    /* quality 5 */
    XVID_VOP_HALFPEL | XVID_VOP_INTER4V |
    XVID_VOP_TRELLISQUANT,
 
    /* quality 6 */
    XVID_VOP_HALFPEL | XVID_VOP_INTER4V |
    XVID_VOP_TRELLISQUANT | XVID_VOP_HQACPRED,
 
};
 
static int XDIM=320,YDIM=240;
int
enc_init(int use_assembler)
{
    int xerr;
      xvid_plugin_single_t single;
    xvid_plugin_2pass1_t rc2pass1;
    xvid_plugin_2pass2_t rc2pass2;
    xvid_enc_plugin_t plugins[7];
    xvid_gbl_init_t xvid_gbl_init;
    xvid_enc_create_t xvid_enc_create;
 
    /*------------------------------------------------------------------------
     * XviD core initialization
     *----------------------------------------------------------------------*/
 
    /* Set version -- version checking will done by xvidcore */
    memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init));
    xvid_gbl_init.version = XVID_VERSION;
    xvid_gbl_init.debug = 0;
 
 
    /* Do we have to enable ASM optimizations ? */
    if (use_assembler) {
        xvid_gbl_init.cpu_flags = 0;
    }
 
    /* Initialize XviD core -- Should be done once per __process__ */
    xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
 
    /*------------------------------------------------------------------------
     * XviD encoder initialization
     *----------------------------------------------------------------------*/
 
    /* Version again */
    memset(&xvid_enc_create, 0, sizeof(xvid_enc_create));
    xvid_enc_create.version = XVID_VERSION;
 
    /* Width and Height of input frames */
    xvid_enc_create.width = XDIM;
    xvid_enc_create.height = YDIM;
    xvid_enc_create.profile = XVID_PROFILE_S_L3;
 
    /* init plugins */
    xvid_enc_create.zones = NULL;
    xvid_enc_create.num_zones = 0;
 
    xvid_enc_create.plugins = NULL;
    xvid_enc_create.num_plugins = 0;
 
    /* No fancy thread tests */
    xvid_enc_create.num_threads = 0;
 
    /* Frame rate - Do some quick float fps = fincr/fbase hack */
    if ((ARG_FRAMERATE - (int) ARG_FRAMERATE) < SMALL_EPS) {
        xvid_enc_create.fincr = 1;
        xvid_enc_create.fbase = (int) ARG_FRAMERATE;
    } else {
        xvid_enc_create.fincr = FRAMERATE_INCR;
        xvid_enc_create.fbase = (int) (FRAMERATE_INCR * ARG_FRAMERATE);
    }
 
    /* Maximum key frame interval */
    if (ARG_MAXKEYINTERVAL > 0) {
        xvid_enc_create.max_key_interval = ARG_MAXKEYINTERVAL;
    }else {
        xvid_enc_create.max_key_interval = (int) ARG_FRAMERATE *10;
    }
 
    /* Bframes settings */
    xvid_enc_create.max_bframes = 0;
    xvid_enc_create.bquant_ratio = 150;
    xvid_enc_create.bquant_offset = 100;
 
    /* Dropping ratio frame -- we don't need that */
    xvid_enc_create.frame_drop_ratio = 0;
 
    /* Global encoder options */
    xvid_enc_create.global = 0;
 
    /* I use a small value here, since will not encode whole movies, but short clips */
    xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
 
    /* Retrieve the encoder instance from the structure */
    enc_handle = xvid_enc_create.handle;
 
    return (xerr);
}
 
int
enc_main(unsigned char *image,
         unsigned char *bitstream,
         int *key,
         int *stats_type,
         int *stats_quant,
         int *stats_length,
 
         int sse[3])
{
    int ret;
 
    xvid_enc_frame_t xvid_enc_frame;
    xvid_enc_stats_t xvid_enc_stats;
 
    /* Version for the frame and the stats */
    memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame));
    xvid_enc_frame.version = XVID_VERSION;
 
    memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats));
    xvid_enc_stats.version = XVID_VERSION;
 
    /* Bind output buffer */
    xvid_enc_frame.bitstream = bitstream;
    xvid_enc_frame.length = -1;
 
    /* Initialize input image fields */
    if (image) {
        xvid_enc_frame.input.plane[0] = image;
        xvid_enc_frame.input.csp = XVID_CSP_I420;
        xvid_enc_frame.input.stride[0] = XDIM;
    } else {
        xvid_enc_frame.input.csp = XVID_CSP_NULL;
    }
 
    /* Set up core's general features */
    xvid_enc_frame.vol_flags = 0;
 
    /* Set up core's general features */
    xvid_enc_frame.vop_flags = vop_presets[ARG_QUALITY];
 
    /* Frame type -- let core decide for us */
    xvid_enc_frame.type = XVID_TYPE_AUTO;
 
    /* Force the right quantizer -- It is internally managed by RC plugins */
    xvid_enc_frame.quant = 3;
 
    /* Set up motion estimation flags */
    xvid_enc_frame.motion = motion_presets[ARG_QUALITY];
 
    /* We don't use special matrices */
    xvid_enc_frame.quant_intra_matrix = NULL;
    xvid_enc_frame.quant_inter_matrix = NULL;
 
    /* Encode the frame */
    ret = xvid_encore(enc_handle, XVID_ENC_ENCODE, &xvid_enc_frame,
                     &xvid_enc_stats);
 
    *key = (xvid_enc_frame.out_flags & XVID_KEYFRAME);
    *stats_type = xvid_enc_stats.type;
    *stats_quant = xvid_enc_stats.quant;
    *stats_length = xvid_enc_stats.length;
    sse[0] = xvid_enc_stats.sse_y;
    sse[1] = xvid_enc_stats.sse_u;
    sse[2] = xvid_enc_stats.sse_v;
    return (ret);
}
 
int
enc_stop()
{
    int xerr;
 
    /* Destroy the encoder instance */
    xerr = xvid_encore(enc_handle, XVID_ENC_DESTROY, NULL, NULL);
 
    return (xerr);
}