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added support for older YUV4MPEG format (used by xawtv) 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3790 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
alex 2001-12-27 11:30:07 +00:00
parent ecee4bef8c
commit 46fb559fd7
1 changed files with 108 additions and 25 deletions
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133
libmpdemux/demux_y4m.c
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@ -1,5 +1,6 @@
// Y4M file parser by Rik Snel (using yuv4mpeg*.[ch] from
// mjpeg.sourceforge.net) (derived from demux_viv.c)
// older YUV4MPEG (used by xawtv) support by Alex Beregszaszi
#include <stdio.h>
#include <stdlib.h>
@ -19,27 +20,40 @@
typedef struct {
int framenum;
y4m_stream_info_t* si;
int is_older;
} y4m_priv_t;
int y4m_check_file(demuxer_t* demuxer){
int orig_pos = stream_tell(demuxer->stream);
char buf[10];
y4m_priv_t* priv;
mp_msg(MSGT_DEMUX, MSGL_V, "Checking for YUV4MPEG2\n");
stream_read(demuxer->stream, buf, 9);
buf[9] = 0;
if (strncmp("YUV4MPEG2", buf, 9)) {
if (strncmp("YUV4MPEG2", buf, 9) && strncmp("YUV4MPEG ", buf, 9)) {
mp_msg(MSGT_DEMUX, MSGL_DBG2, "Failed: YUV4MPEG2\n");
return 0;
}
demuxer->priv = malloc(sizeof(y4m_priv_t));
priv = demuxer->priv;
priv->is_older = 0;
if (!strncmp("YUV4MPEG ", buf, 9))
{
mp_msg(MSGT_DEMUX, MSGL_V, "Found older YUV4MPEG format (used by xawtv)\n");
priv->is_older = 1;
}
mp_msg(MSGT_DEMUX,MSGL_DBG2,"Success: YUV4MPEG2\n");
stream_seek(demuxer->stream, orig_pos);
return 1;
return 1;
}
@ -65,9 +79,19 @@ int demux_y4m_fill_buffer(demuxer_t *demux) {
buf[1] = dp->buffer + 5*size/4;
buf[2] = dp->buffer + size;
if ((err=y4m_read_frame(demux->stream, priv->si, &fi, buf)) != Y4M_OK) {
if (priv->is_older)
{
stream_skip(demux->stream, 6); /* FRAME\n */
stream_read(demux->stream, buf[0], size);
stream_read(demux->stream, buf[1], size/4);
stream_read(demux->stream, buf[2], size/4);
}
else
{
if ((err=y4m_read_frame(demux->stream, priv->si, &fi, buf)) != Y4M_OK) {
mp_msg(MSGT_DEMUX, MSGL_V, "error reading frame %s\n", y4m_strerr(err));
return 0;
}
}
/* This seems to be the right way to calculate the presentation time stamp */
@ -81,40 +105,96 @@ int demux_y4m_fill_buffer(demuxer_t *demux) {
}
void demux_open_y4m(demuxer_t* demuxer){
y4m_priv_t* priv;
y4m_priv_t* priv = demuxer->priv;
y4m_ratio_t framerate;
sh_video_t* sh=new_sh_video(demuxer,0);
int err;
demuxer->priv = malloc(sizeof(y4m_priv_t));
priv = demuxer->priv;
priv->framenum = 0;
priv->si = malloc(sizeof(y4m_stream_info_t));
y4m_init_stream_info(priv->si);
if ((err=y4m_read_stream_header(demuxer->stream, priv->si)) != Y4M_OK)
mp_msg(MSGT_DEMUXER, MSGL_FATAL, "error parsing YUV4MPEG header: %s\n", y4m_strerr(err));
sh->format = mmioFOURCC('Y', 'V', '1', '2');
if (priv->is_older)
{
char buf[4];
int frame_rate_code;
if(!sh->fps) {
framerate = y4m_si_get_framerate(priv->si);
if (framerate.d != 0)
sh->fps=(float)framerate.n/(float)framerate.d;
else
sh->fps=15.0f;
priv->framenum = 1;
stream_skip(demuxer->stream, 8); /* YUV4MPEG */
stream_skip(demuxer->stream, 1); /* space */
stream_read(demuxer->stream, (char *)&buf[0], 3);
buf[3] = 0;
sh->disp_w = atoi(buf);
stream_skip(demuxer->stream, 1); /* space */
stream_read(demuxer->stream, (char *)&buf[0], 3);
buf[3] = 0;
sh->disp_h = atoi(buf);
stream_skip(demuxer->stream, 1); /* space */
stream_read(demuxer->stream, (char *)&buf[0], 1);
buf[1] = 0;
frame_rate_code = atoi(buf);
stream_skip(demuxer->stream, 1); /* new-line */
if (!sh->fps)
{
/* values from xawtv */
switch(frame_rate_code)
{
case 1:
sh->fps = 23.976f;
break;
case 2:
sh->fps = 24.0f;
break;
case 3:
sh->fps = 25.0f;
break;
case 4:
sh->fps = 29.97f;
break;
case 5:
sh->fps = 30.0f;
break;
case 6:
sh->fps = 50.0f;
break;
case 7:
sh->fps = 59.94f;
break;
case 8:
sh->fps = 60.0f;
break;
default:
sh->fps = 25.0f;
}
}
sh->frametime = 1.0f/sh->fps;
}
sh->frametime=1.0f/sh->fps;
else
{
y4m_init_stream_info(priv->si);
if ((err=y4m_read_stream_header(demuxer->stream, priv->si)) != Y4M_OK)
mp_msg(MSGT_DEMUXER, MSGL_FATAL, "error parsing YUV4MPEG header: %s\n", y4m_strerr(err));
if(!sh->fps) {
framerate = y4m_si_get_framerate(priv->si);
if (framerate.d != 0)
sh->fps=(float)framerate.n/(float)framerate.d;
else
sh->fps=15.0f;
}
sh->frametime=1.0f/sh->fps;
sh->disp_w = y4m_si_get_width(priv->si);
sh->disp_h = y4m_si_get_height(priv->si);
sh->disp_w = y4m_si_get_width(priv->si);
sh->disp_h = y4m_si_get_height(priv->si);
}
sh->format = mmioFOURCC('Y', 'V', '1', '2');
sh->bih=malloc(sizeof(BITMAPINFOHEADER));
memset(sh->bih,0,sizeof(BITMAPINFOHEADER));
sh->bih->biSize=40;
sh->bih->biWidth = priv->si->width;
sh->bih->biHeight = priv->si->height;
sh->bih->biWidth = sh->disp_w;
sh->bih->biHeight = sh->disp_h;
sh->bih->biPlanes=3;
sh->bih->biBitCount=12;
sh->bih->biCompression=sh->format;
@ -134,7 +214,10 @@ void demux_open_y4m(demuxer_t* demuxer){
void demux_close_y4m(demuxer_t *demuxer)
{
y4m_fini_stream_info(((y4m_priv_t*)demuxer->priv)->si);
y4m_priv_t* priv;
if (!priv->is_older)
y4m_fini_stream_info(((y4m_priv_t*)demuxer->priv)->si);
free(((y4m_priv_t*)demuxer->priv)->si);
free(demuxer->priv);
return;