mirror of
https://github.com/mpv-player/mpv
synced 2024-12-16 03:45:23 +00:00
bb56123065
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8966 b3059339-0415-0410-9bf9-f77b7e298cf2
373 lines
12 KiB
C
373 lines
12 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 <string.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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/* sub_cc (closed captions)*/
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#include "../sub_cc.h"
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/* biCompression constant */
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#define BI_RGB 0L
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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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#if 0
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if(sh_video->bih->biCompression == BI_RGB &&
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(sh_video->video.fccHandler == mmioFOURCC('D', 'I', 'B', ' ') ||
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sh_video->video.fccHandler == mmioFOURCC('R', 'G', 'B', ' ') ||
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sh_video->video.fccHandler == mmioFOURCC('R', 'A', 'W', ' ') ||
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sh_video->video.fccHandler == 0)) {
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sh_video->format = mmioFOURCC(0, 'R', 'G', 'B') | sh_video->bih->biBitCount;
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}
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else
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#endif
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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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#if 1
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/* hack to support decoding of mpeg1 chunks in AVI's with libmpeg2 -- 2002 alex */
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if ((sh_video->format == 0x10000001) ||
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(sh_video->format == 0x10000002) ||
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(sh_video->format == mmioFOURCC('m','p','g','1')) ||
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(sh_video->format == mmioFOURCC('M','P','G','1')) ||
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(sh_video->format == mmioFOURCC('m','p','g','2')) ||
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(sh_video->format == mmioFOURCC('M','P','G','2')) ||
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(sh_video->format == mmioFOURCC('m','p','e','g')) ||
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(sh_video->format == mmioFOURCC('M','P','E','G')))
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{
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int saved_pos, saved_type;
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/* demuxer pos saving is required for libavcodec mpeg decoder as it's
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reading the mpeg header self! */
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saved_pos = d_video->buffer_pos;
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saved_type = d_video->demuxer->file_format;
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d_video->demuxer->file_format = DEMUXER_TYPE_MPEG_ES;
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video_read_properties(sh_video);
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d_video->demuxer->file_format = saved_type;
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d_video->buffer_pos = saved_pos;
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// goto mpeg_header_parser;
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}
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#endif
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break;
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}
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#ifdef STREAMING_LIVE_DOT_COM
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case DEMUXER_TYPE_RTP:
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// If the RTP stream is a MPEG stream, then we use this code to check
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// for MPEG headers:
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if (!demux_is_mpeg_rtp_stream(d_video->demuxer)) break;
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// otherwise fall through to...
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#endif
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case DEMUXER_TYPE_PVA:
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case DEMUXER_TYPE_MPEG_ES:
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case DEMUXER_TYPE_MPEG_PS: {
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//mpeg_header_parser:
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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>0) 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 4: // SECAM 4:3? - XXX check with more files!
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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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case 6: // (PAL?)/NTSC Widescreen SVCD 16:9
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sh_video->aspect=16.0/9.0;
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break;
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case 9: // Movie Type ??? / 640x480
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sh_video->aspect=0.0;
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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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static void process_userdata(unsigned char* buf,int len){
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int i;
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/* if the user data starts with "CC", assume it is a CC info packet */
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if(len>2 && buf[0]=='C' && buf[1]=='C'){
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// mp_msg(MSGT_DECVIDEO,MSGL_DBG2,"video.c: process_userdata() detected Closed Captions!\n");
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if(subcc_enabled) subcc_process_data(buf+2,len-2);
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}
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if(verbose<2) return;
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printf( "user_data: len=%3d %02X %02X %02X %02X '",
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len, buf[0], buf[1], buf[2], buf[3]);
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for(i=0;i<len;i++)
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// if(buf[i]>=32 && buf[i]<127) putchar(buf[i]);
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if(buf[i]&0x60) putchar(buf[i]&0x7F);
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printf("'\n");
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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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float pts=0;
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int picture_coding_type=0;
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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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|| demuxer->file_format==DEMUXER_TYPE_PVA
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#ifdef STREAMING_LIVE_DOT_COM
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|| (demuxer->file_format==DEMUXER_TYPE_RTP && demux_is_mpeg_rtp_stream(demuxer))
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#endif
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){
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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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int start=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 0
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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){
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pts=d_video->pts;
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d_video->pts=0;
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}
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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, &videobuffer[start]);break;
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case 0x1B5: mp_header_process_extension (&picture, &videobuffer[start]);break;
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case 0x1B2: process_userdata (&videobuffer[start], videobuf_len-start);break;
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case 0x100: picture_coding_type=(videobuffer[start+1] >> 3) & 7;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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// override frame_time for variable/unknown FPS formats:
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if(!force_fps) switch(demuxer->file_format){
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case DEMUXER_TYPE_REAL:
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if(d_video->pts>0 && pts1>0 && d_video->pts>pts1)
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frame_time=d_video->pts-pts1;
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break;
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#ifdef USE_TV
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case DEMUXER_TYPE_TV:
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#endif
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case DEMUXER_TYPE_MOV:
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case DEMUXER_TYPE_FILM:
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case DEMUXER_TYPE_VIVO:
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case DEMUXER_TYPE_ASF: {
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float next_pts = ds_get_next_pts(d_video);
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float d= next_pts > 0 ? next_pts - d_video->pts : d_video->pts-pts1;
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if(d>=0){
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if(d>0){
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if((int)sh_video->fps==1000)
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mp_msg(MSGT_CPLAYER,MSGL_V,"\navg. 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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frame_time = d;
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} else {
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mp_msg(MSGT_CPLAYER,MSGL_WARN,"\nInvalid frame duration value (%5.3f/%5.3f => %5.3f). Defaulting to %5.3f sec.\n",d_video->pts,next_pts,d,frame_time);
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// frame_time = 1/25.0;
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}
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}
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}
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if(demuxer->file_format==DEMUXER_TYPE_MPEG_PS ||
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demuxer->file_format==DEMUXER_TYPE_MPEG_ES){
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// if(pts>0.0001) printf("\r!!! pts: %5.3f [%d] (%5.3f) \n",pts,picture_coding_type,i_pts);
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sh_video->pts+=frame_time;
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if(picture_coding_type<=2 && sh_video->i_pts){
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// printf("XXX predict: %5.3f pts: %5.3f error=%5.5f \n",i_pts,d_video->pts2,i_pts-d_video->pts2);
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sh_video->pts=sh_video->i_pts;
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sh_video->i_pts=pts;
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} else {
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if(pts){
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if(picture_coding_type<=2) sh_video->i_pts=pts;
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else {
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// printf("BBB predict: %5.3f pts: %5.3f error=%5.5f \n",pts,d_video->pts2,pts-d_video->pts2);
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sh_video->pts=pts;
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}
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}
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}
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// printf("\rIII pts: %5.3f [%d] (%5.3f) \n",d_video->pts2,picture_coding_type,i_pts);
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} else
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sh_video->pts=d_video->pts;
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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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