muxers.c

X264的纯C语言的的原码

/*****************************************************************************
 * muxers.c: h264 file i/o plugins
 *****************************************************************************
 * Copyright (C) 2003-2006 x264 project
 *
 * 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, USA.
 *****************************************************************************/

#define _LARGEFILE_SOURCE
#define _FILE_OFFSET_BITS 64

#include <stdio.h>
#include <string.h>
///#include <sys/types.h>

#include "common.h"
#include "x264.h"
#include "matroska.h"
#include "muxers.h"

///#ifndef _MSC_VER
///#include "config.h"
///#endif

#ifdef AVIS_INPUT
#include <windows.h>
#include <vfw.h>
#endif

#ifdef MP4_OUTPUT
#include <gpac/isomedia.h>
#endif

typedef struct {
    FILE *fh;
    int width, height;
    int next_frame;
} yuv_input_t;

/* raw 420 yuv file operation */
int open_file_yuv( char *psz_filename, hnd_t *p_handle, x264_param_t *p_param )
{
    yuv_input_t *h = malloc(sizeof(yuv_input_t));
    h->width = p_param->i_width;
    h->height = p_param->i_height;
    h->next_frame = 0;

    if( !strcmp(psz_filename, "-") )
        h->fh = stdin;
    else
        h->fh = fopen(psz_filename, "rb");
    if( h->fh == NULL )
        return -1;

    *p_handle = (hnd_t)h;
    return 0;
}

int get_frame_total_yuv( hnd_t handle )
{
    yuv_input_t *h = handle;
    int i_frame_total = 0;

    if( !fseek( h->fh, 0, SEEK_END ) )
    {
        uint64_t i_size = ftell( h->fh );
        fseek( h->fh, 0, SEEK_SET );
        i_frame_total = (int)(i_size / ( h->width * h->height * 3 / 2 ));
    }

    return i_frame_total;
}

int read_frame_yuv( x264_picture_t *p_pic, hnd_t handle, int i_frame )
{
    yuv_input_t *h = handle;

    if( i_frame != h->next_frame )
        if( fseek( h->fh, (uint64_t)i_frame * h->width * h->height * 3 / 2, SEEK_SET ) )
            return -1;

    if( fread( p_pic->img.plane[0], 1, h->width * h->height, h->fh ) <= 0
            || fread( p_pic->img.plane[1], 1, h->width * h->height / 4, h->fh ) <= 0
            || fread( p_pic->img.plane[2], 1, h->width * h->height / 4, h->fh ) <= 0 )
        return -1;
    fprintf(stderr,"read_frame_yuv out:p_pic->img.plane[0]=%d\n",*p_pic->img.plane[0]);//add
	fprintf(stderr,"read_frame_yuv out:p_pic->img.plane[1]=%d\n",*p_pic->img.plane[1]);//add
	fprintf(stderr,"read_frame_yuv out:p_pic->img.plane[2]=%d\n",*p_pic->img.plane[2]);//add
    h->next_frame = i_frame+1;

    return 0;
}

int close_file_yuv(hnd_t handle)
{
    yuv_input_t *h = handle;
    if( !h || !h->fh )
        return 0;
    return fclose(h->fh);
}

/* YUV4MPEG2 raw 420 yuv file operation */
typedef struct {
    FILE *fh;
    int width, height;
    int next_frame;
    int seq_header_len, frame_header_len;
    int frame_size;
} y4m_input_t;

#define Y4M_MAGIC "YUV4MPEG2"
#define MAX_YUV4_HEADER 80
#define Y4M_FRAME_MAGIC "FRAME"
#define MAX_FRAME_HEADER 80

int open_file_y4m( char *psz_filename, hnd_t *p_handle, x264_param_t *p_param )
{
    int  i, n, d;
    int  interlaced;
    char header[MAX_YUV4_HEADER+10];
    char *tokstart, *tokend, *header_end;
    y4m_input_t *h = malloc(sizeof(y4m_input_t));

    h->next_frame = 0;

    if( !strcmp(psz_filename, "-") )
        h->fh = stdin;
    else
        h->fh = fopen(psz_filename, "rb");
    if( h->fh == NULL )
        return -1;

    h->frame_header_len = strlen(Y4M_FRAME_MAGIC)+1;

    /* Read header */
    for( i=0; i<MAX_YUV4_HEADER; i++ )
    {
        header[i] = fgetc(h->fh);
        if( header[i] == '\n' )
        {
            /* Add a space after last option. Makes parsing "444" vs
               "444alpha" easier. */
            header[i+1] = 0x20;
            header[i+2] = 0;
            break;
        }
    }
    if( i == MAX_YUV4_HEADER || strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC)) )
        return -1;

    /* Scan properties */
    header_end = &header[i+1]; /* Include space */
    h->seq_header_len = i+1;
    for( tokstart = &header[strlen(Y4M_MAGIC)+1]; tokstart < header_end; tokstart++ )
    {
        if(*tokstart==0x20) continue;
        switch(*tokstart++)
        {
        case 'W': /* Width. Required. */
            h->width = p_param->i_width = strtol(tokstart, &tokend, 10);
            tokstart=tokend;
            break;
        case 'H': /* Height. Required. */
            h->height = p_param->i_height = strtol(tokstart, &tokend, 10);
            tokstart=tokend;
            break;
        case 'C': /* Color space */
            if( strncmp("420", tokstart, 3) )
            {
                fprintf(stderr, "Colorspace unhandled\n");
                return -1;
            }
            tokstart = strchr(tokstart, 0x20);
            break;
        case 'I': /* Interlace type */
            switch(*tokstart++)
            {
            case 'p': interlaced = 0; break;
            case '?':
            case 't':
            case 'b':
            case 'm':
            default: interlaced = 1;
                fprintf(stderr, "Warning, this sequence might be interlaced\n");
            }
            break;
        case 'F': /* Frame rate - 0:0 if unknown */
            if( sscanf(tokstart, "%d:%d", &n, &d) == 2 && n && d )
            {
                x264_reduce_fraction( &n, &d );
                p_param->i_fps_num = n;
                p_param->i_fps_den = d;
            }
            tokstart = strchr(tokstart, 0x20);
            break;
        case 'A': /* Pixel aspect - 0:0 if unknown */
            if( sscanf(tokstart, "%d:%d", &n, &d) == 2 && n && d )
            {
                x264_reduce_fraction( &n, &d );
                p_param->vui.i_sar_width = n;
                p_param->vui.i_sar_height = d;
            }
            tokstart = strchr(tokstart, 0x20);
            break;
        case 'X': /* Vendor extensions */
            if( !strncmp("YSCSS=",tokstart,6) )
            {
                /* Older nonstandard pixel format representation */
                tokstart += 6;
                if( strncmp("420JPEG",tokstart,7) &&
                    strncmp("420MPEG2",tokstart,8) &&
                    strncmp("420PALDV",tokstart,8) )
                {
                    fprintf(stderr, "Unsupported extended colorspace\n");
                    return -1;
                }
            }
            tokstart = strchr(tokstart, 0x20);
            break;
        }
    }

    fprintf(stderr, "yuv4mpeg: %ix%i@%i/%ifps, %i:%i\n",
            h->width, h->height, p_param->i_fps_num, p_param->i_fps_den,
            p_param->vui.i_sar_width, p_param->vui.i_sar_height);

    *p_handle = (hnd_t)h;
    return 0;
}

/* Most common case: frame_header = "FRAME" */
int get_frame_total_y4m( hnd_t handle )
{int          i_frame_total = 0;
 /*   y4m_input_t *h             = handle;
    
    off_t        init_pos      = ftell(h->fh);

    if( !fseek( h->fh, 0, SEEK_END ) )
    {
        uint64_t i_size = ftell( h->fh );
        fseek( h->fh, init_pos, SEEK_SET );
        i_frame_total = (int)((i_size - h->seq_header_len) /
                              (3*(h->width*h->height)/2+h->frame_header_len));
    }*/

    return i_frame_total;
}

int read_frame_y4m( x264_picture_t *p_pic, hnd_t handle, int i_frame )
{
    int          slen = strlen(Y4M_FRAME_MAGIC);
    int          i    = 0;
    char         header[16];
    y4m_input_t *h    = handle;

    if( i_frame != h->next_frame )
    {
        if (fseek(h->fh, (uint64_t)i_frame*(3*(h->width*h->height)/2+h->frame_header_len)
                  + h->seq_header_len, SEEK_SET))
            return -1;
    }

    /* Read frame header - without terminating '\n' */
    if (fread(header, 1, slen, h->fh) != slen)
        return -1;
    
    header[slen] = 0;
    if (strncmp(header, Y4M_FRAME_MAGIC, slen))
    {
        fprintf(stderr, "Bad header magic (%08X <=> %s)\n",
                *((uint32_t*)header), header);
        return -1;
    }
  
    /* Skip most of it */
    while (i<MAX_FRAME_HEADER && fgetc(h->fh) != '\n')
        i++;
    if (i == MAX_FRAME_HEADER)
    {
        fprintf(stderr, "Bad frame header!\n");
        return -1;
    }
    h->frame_header_len = i+slen+1;

    if( fread(p_pic->img.plane[0], 1, h->width*h->height, h->fh) <= 0
        || fread(p_pic->img.plane[1], 1, h->width * h->height / 4, h->fh) <= 0
        || fread(p_pic->img.plane[2], 1, h->width * h->height / 4, h->fh) <= 0)
        return -1;

    h->next_frame = i_frame+1;

    return 0;
}

int close_file_y4m(hnd_t handle)
{
    y4m_input_t *h = handle;
    if( !h || !h->fh )
        return 0;
    return fclose(h->fh);
}

/* avs/avi input file support under cygwin */

#ifdef AVIS_INPUT
typedef struct {
    PAVISTREAM p_avi;
    int width, height;
} avis_input_t;

int gcd(int a, int b)
{
    int c;

    while (1)
    {
        c = a % b;
        if (!c)
            return b;
        a = b;
        b = c;
    }
}

int open_file_avis( char *psz_filename, hnd_t *p_handle, x264_param_t *p_param )
{
    avis_input_t *h = malloc(sizeof(avis_input_t));
    AVISTREAMINFO info;
    int i;

    *p_handle = (hnd_t)h;

    AVIFileInit();
    if( AVIStreamOpenFromFile( &h->p_avi, psz_filename, streamtypeVIDEO, 0, OF_READ, NULL ) )
    {
        AVIFileExit();
        return -1;
    }

    if( AVIStreamInfo(h->p_avi, &info, sizeof(AVISTREAMINFO)) )
    {
        AVIStreamRelease(h->p_avi);
        AVIFileExit();
        return -1;
    }

    // check input format
    if (info.fccHandler != MAKEFOURCC('Y', 'V', '1', '2'))
    {
        fprintf( stderr, "avis [error]: unsupported input format (%c%c%c%c)\n",
            (char)(info.fccHandler & 0xff), (char)((info.fccHandler >> 8) & 0xff),
            (char)((info.fccHandler >> 16) & 0xff), (char)((info.fccHandler >> 24)) );

        AVIStreamRelease(h->p_avi);
        AVIFileExit();

        return -1;
    }

    h->width =
    p_param->i_width = info.rcFrame.right - info.rcFrame.left;
    h->height =
    p_param->i_height = info.rcFrame.bottom - info.rcFrame.top;
    i = gcd(info.dwRate, info.dwScale);
    p_param->i_fps_den = info.dwScale / i;
    p_param->i_fps_num = info.dwRate / i;

    fprintf( stderr, "avis [info]: %dx%d @ %.2f fps (%d frames)\n",
        p_param->i_width, p_param->i_height,
        (double)p_param->i_fps_num / (double)p_param->i_fps_den,
        (int)info.dwLength );

    return 0;
}

int get_frame_total_avis( hnd_t handle )
{
    avis_input_t *h = handle;
    AVISTREAMINFO info;

    if( AVIStreamInfo(h->p_avi, &info, sizeof(AVISTREAMINFO)) )
        return -1;

    return info.dwLength;
}

int read_frame_avis( x264_picture_t *p_pic, hnd_t handle, int i_frame )
{
    avis_input_t *h = handle;

    p_pic->img.i_csp = X264_CSP_YV12;

    if( AVIStreamRead(h->p_avi, i_frame, 1, p_pic->img.plane[0], h->width * h->height * 3 / 2, NULL, NULL ) )
        return -1;

    return 0;
}

int close_file_avis( hnd_t handle )
{
    avis_input_t *h = handle;
    AVIStreamRelease(h->p_avi);
    AVIFileExit();
    free(h);
    return 0;
}
#endif


#ifdef HAVE_PTHREAD
typedef struct {
    int (*p_read_frame)( x264_picture_t *p_pic, hnd_t handle, int i_frame );
    int (*p_close_infile)( hnd_t handle );
    hnd_t p_handle;
    x264_picture_t pic;
    pthread_t tid;
    int next_frame;
    int frame_total;
    struct thread_input_arg_t *next_args;
} thread_input_t;

typedef struct thread_input_arg_t {
    thread_input_t *h;
    x264_picture_t *pic;
    int i_frame;
    int status;
} thread_input_arg_t;

int open_file_thread( char *psz_filename, hnd_t *p_handle, x264_param_t *p_param )
{
    thread_input_t *h = malloc(sizeof(thread_input_t));
    x264_picture_alloc( &h->pic, X264_CSP_I420, p_param->i_width, p_param->i_height );
    h->p_read_frame = p_read_frame;
    h->p_close_infile = p_close_infile;
    h->p_handle = *p_handle;
    h->next_frame = -1;
    h->next_args = malloc(sizeof(thread_input_arg_t));
    h->next_args->h = h;
    h->next_args->status = 0;
    h->frame_total = p_get_frame_total( h->p_handle );

    *p_handle = (hnd_t)h;
    return 0;
}

int get_frame_total_thread( hnd_t handle )
{
    thread_input_t *h = handle;
    return h->frame_total;
}

void read_frame_thread_int( thread_input_arg_t *i )
{
    i->status = i->h->p_read_frame( i->pic, i->h->p_handle, i->i_frame );
}

int read_frame_thread( x264_picture_t *p_pic, hnd_t handle, int i_frame )
{
    thread_input_t *h = handle;
    UNUSED void *stuff;
    int ret = 0;

    if( h->next_frame >= 0 )
    {
        pthread_join( h->tid, &stuff );
        ret |= h->next_args->status;
    }

    if( h->next_frame == i_frame )
    {
        XCHG( x264_picture_t, *p_pic, h->pic );
    }
    else
    {
        ret |= h->p_read_frame( p_pic, h->p_handle, i_frame );
    }

    if( !h->frame_total || i_frame+1 < h->frame_total )
    {
        h->next_frame =
        h->next_args->i_frame = i_frame+1;
        h->next_args->pic = &h->pic;
        pthread_create( &h->tid, NULL, (void*)read_frame_thread_int, h->next_args );
    }
    else
        h->next_frame = -1;

    return ret;
}

int close_file_thread( hnd_t handle )
{
    thread_input_t *h = handle;
    h->p_close_infile( h->p_handle );
    x264_picture_clean( &h->pic );