mirror of https://github.com/mpv-player/mpv
249 lines
8.0 KiB
C
249 lines
8.0 KiB
C
// read video frame
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#include "config.h"
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#include <stdio.h>
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#include <stdlib.h>
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#include <unistd.h>
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#include "mp_msg.h"
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#include "help_mp.h"
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#include "stream.h"
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#include "demuxer.h"
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#include "stheader.h"
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#include "parse_es.h"
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#include "mpeg_hdr.h"
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static mp_mpeg_header_t picture;
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int video_read_properties(sh_video_t *sh_video){
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demux_stream_t *d_video=sh_video->ds;
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// Determine image properties:
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switch(d_video->demuxer->file_format){
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case DEMUXER_TYPE_AVI:
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case DEMUXER_TYPE_ASF: {
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// display info:
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sh_video->format=sh_video->bih->biCompression;
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sh_video->disp_w=sh_video->bih->biWidth;
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sh_video->disp_h=abs(sh_video->bih->biHeight);
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break;
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}
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case DEMUXER_TYPE_MPEG_ES:
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case DEMUXER_TYPE_MPEG_PS: {
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// Find sequence_header first:
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videobuf_len=0; videobuf_code_len=0;
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mp_msg(MSGT_DECVIDEO,MSGL_V,"Searching for sequence header... ");fflush(stdout);
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while(1){
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int i=sync_video_packet(d_video);
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if(i==0x1B3) break; // found it!
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if(!i || !skip_video_packet(d_video)){
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if(verbose) mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
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mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_MpegNoSequHdr);
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return 0;
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}
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}
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mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\n");
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// sh_video=d_video->sh;sh_video->ds=d_video;
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// mpeg2_init();
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// ========= Read & process sequence header & extension ============
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if(!videobuffer) videobuffer=(char*)memalign(8,VIDEOBUFFER_SIZE);
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if(!videobuffer){
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mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_ShMemAllocFail);
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return 0;
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}
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if(!read_video_packet(d_video)){
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mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_CannotReadMpegSequHdr);
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return 0;
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}
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if(mp_header_process_sequence_header (&picture, &videobuffer[4])) {
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mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_BadMpegSequHdr);
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return 0;
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}
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if(sync_video_packet(d_video)==0x1B5){ // next packet is seq. ext.
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// videobuf_len=0;
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int pos=videobuf_len;
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if(!read_video_packet(d_video)){
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mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_CannotReadMpegSequHdrEx);
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return 0;
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}
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if(mp_header_process_extension (&picture, &videobuffer[pos+4])) {
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mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_BadMpegSequHdrEx);
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return 0;
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}
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}
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// printf("picture.fps=%d\n",picture.fps);
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// fill aspect info:
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switch(picture.aspect_ratio_information){
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case 2: // PAL/NTSC SVCD/DVD 4:3
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case 8: // PAL VCD 4:3
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case 12: // NTSC VCD 4:3
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sh_video->aspect=4.0/3.0;
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break;
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case 3: // PAL/NTSC Widescreen SVCD/DVD 16:9
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sh_video->aspect=16.0/9.0;
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break;
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default:
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fprintf(stderr,"Detected unknown aspect_ratio_information in mpeg sequence header.\n"
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"Please report the aspect value (%i) along with the movie type (VGA,PAL,NTSC,"
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"SECAM) and the movie resolution (720x576,352x240,480x480,...) to the MPlayer"
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" developers, so that we can add support for it!\nAssuming 1:1 aspect for now.\n",
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picture.aspect_ratio_information);
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case 1: // VGA 1:1 - do not prescale
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sh_video->aspect=0.0;
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break;
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}
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// display info:
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sh_video->format=picture.mpeg1?0x10000001:0x10000002; // mpeg video
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sh_video->fps=picture.fps*0.0001f;
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if(!sh_video->fps){
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// if(!force_fps){
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// fprintf(stderr,"FPS not specified (or invalid) in the header! Use the -fps option!\n");
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// return 0;
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// }
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sh_video->frametime=0;
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} else {
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sh_video->frametime=10000.0f/(float)picture.fps;
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}
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sh_video->disp_w=picture.display_picture_width;
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sh_video->disp_h=picture.display_picture_height;
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// bitrate:
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if(picture.bitrate!=0x3FFFF) // unspecified/VBR ?
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sh_video->i_bps=1000*picture.bitrate/16;
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// info:
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mp_dbg(MSGT_DECVIDEO,MSGL_DBG2,"mpeg bitrate: %d (%X)\n",picture.bitrate,picture.bitrate);
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mp_msg(MSGT_DECVIDEO,MSGL_INFO,"VIDEO: %s %dx%d (aspect %d) %4.2f fps %5.1f kbps (%4.1f kbyte/s)\n",
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picture.mpeg1?"MPEG1":"MPEG2",
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sh_video->disp_w,sh_video->disp_h,
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picture.aspect_ratio_information,
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sh_video->fps,
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picture.bitrate*0.5f,
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picture.bitrate/16.0f );
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break;
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}
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} // switch(file_format)
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return 1;
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}
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int video_read_frame(sh_video_t* sh_video,float* frame_time_ptr,unsigned char** start,int force_fps){
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demux_stream_t *d_video=sh_video->ds;
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demuxer_t *demuxer=d_video->demuxer;
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float frame_time=1;
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float pts1=d_video->pts;
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// unsigned char* start=NULL;
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int in_size=0;
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*start=NULL;
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if(demuxer->file_format==DEMUXER_TYPE_MPEG_ES || demuxer->file_format==DEMUXER_TYPE_MPEG_PS){
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int in_frame=0;
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//float newfps;
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//videobuf_len=0;
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while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE){
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int i=sync_video_packet(d_video);
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void* buffer=&videobuffer[videobuf_len+4];
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if(in_frame){
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if(i<0x101 || i>=0x1B0){ // not slice code -> end of frame
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#if 1
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// send END OF FRAME code:
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videobuffer[videobuf_len+0]=0;
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videobuffer[videobuf_len+1]=0;
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videobuffer[videobuf_len+2]=1;
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videobuffer[videobuf_len+3]=0xFF;
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videobuf_len+=4;
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#endif
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if(!i) return -1; // EOF
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break;
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}
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} else {
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//if(i==0x100) in_frame=1; // picture startcode
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if(i>=0x101 && i<0x1B0) in_frame=1; // picture startcode
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else if(!i) return -1; // EOF
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}
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//if(grab_frames==2 && (i==0x1B3 || i==0x1B8)) grab_frames=1;
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if(!read_video_packet(d_video)) return -1; // EOF
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//printf("read packet 0x%X, len=%d\n",i,videobuf_len);
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// process headers:
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switch(i){
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case 0x1B3: mp_header_process_sequence_header (&picture, buffer);break;
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case 0x1B5: mp_header_process_extension (&picture, buffer);break;
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}
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}
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// if(videobuf_len>max_framesize) max_framesize=videobuf_len; // debug
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//printf("--- SEND %d bytes\n",videobuf_len);
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// if(grab_frames==1){
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// FILE *f=fopen("grab.mpg","ab");
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// fwrite(videobuffer,videobuf_len-4,1,f);
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// fclose(f);
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// }
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*start=videobuffer; in_size=videobuf_len;
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//blit_frame=decode_video(video_out,sh_video,videobuffer,videobuf_len,drop_frame);
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#if 1
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// get mpeg fps:
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//newfps=frameratecode2framerate[picture->frame_rate_code]*0.0001f;
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if((int)(sh_video->fps*10000+0.5)!=picture.fps) if(!force_fps){
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mp_msg(MSGT_CPLAYER,MSGL_WARN,"Warning! FPS changed %5.3f -> %5.3f (%f) [%d] \n",sh_video->fps,picture.fps*0.0001,sh_video->fps-picture.fps*0.0001,picture.frame_rate_code);
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sh_video->fps=picture.fps*0.0001;
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sh_video->frametime=10000.0f/(float)picture.fps;
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}
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#endif
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// fix mpeg2 frametime:
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frame_time=(picture.display_time)*0.01f;
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picture.display_time=100;
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videobuf_len=0;
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} else {
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// frame-based file formats: (AVI,ASF,MOV)
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in_size=ds_get_packet(d_video,start);
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if(in_size<0) return -1; // EOF
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// if(in_size>max_framesize) max_framesize=in_size;
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// blit_frame=decode_video(video_out,sh_video,start,in_size,drop_frame);
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}
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// vdecode_time=video_time_usage-vdecode_time;
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//------------------------ frame decoded. --------------------
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// Increase video timers:
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sh_video->num_frames+=frame_time;
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++sh_video->num_frames_decoded;
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frame_time*=sh_video->frametime;
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if(demuxer->file_format==DEMUXER_TYPE_ASF && !force_fps){
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// .ASF files has no fixed FPS - just frame durations!
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float d=d_video->pts-pts1;
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if(d>=0 && d<5) frame_time=d;
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if(d>0){
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if(verbose)
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if((int)sh_video->fps==1000)
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mp_msg(MSGT_CPLAYER,MSGL_STATUS,"\rASF framerate: %d fps \n",(int)(1.0f/d));
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sh_video->frametime=d; // 1ms
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sh_video->fps=1.0f/d;
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}
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} else
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if(demuxer->file_format==DEMUXER_TYPE_MOV && !force_fps){
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// .MOV files has no fixed FPS - just frame durations!
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frame_time=d_video->pts-pts1;
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}
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if(demuxer->file_format==DEMUXER_TYPE_MPEG_PS) d_video->pts+=frame_time;
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if(frame_time_ptr) *frame_time_ptr=frame_time;
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return in_size;
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}
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