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simplified parse_mpeg12_video()

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@22348 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
nicodvb 2007-02-25 22:40:05 +00:00
parent ea63308d9a
commit 1bffdebffa
1 changed files with 73 additions and 83 deletions
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156
libmpdemux/muxer_mpeg.c
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@ -1607,6 +1607,9 @@ static size_t parse_mpeg12_video(muxer_stream_t *s, muxer_priv_t *priv, muxer_he
uint8_t *pce_ptr = NULL; //pointer to picture coding extension
int frames_diff, d1, gop_reset = 0; //how any frames we advanced respect to the last one
int ret;
int i, err;
uint32_t temp_ref;
int pt;
mp_msg(MSGT_MUXER, MSGL_DBG2,"parse_mpeg12_video, len=%u\n", (uint32_t) len);
if(s->buffer[0] != 0 || s->buffer[1] != 0 || s->buffer[2] != 1 || len<6)
@ -1614,82 +1617,82 @@ static size_t parse_mpeg12_video(muxer_stream_t *s, muxer_priv_t *priv, muxer_he
mp_msg(MSGT_MUXER, MSGL_ERR,"Unknown video format, possibly non-MPEG1/2 stream, len=%d!\n", len);
return 0;
}
if(s->buffer[3] == 0 || s->buffer[3] == 0xb3 || s->buffer[3] == 0xb8)
temp_ref = 0;
pt = 0;
err = 0;
i = 0;
while(i + 4 < len)
{ // Video (0) Sequence header (b3) or GOP (b8)
uint32_t temp_ref;
int pt;
if(s->buffer[3] == 0xb3) //sequence
if((s->buffer[i] == 0) && (s->buffer[i+1] == 0) && (s->buffer[i+2] == 1))
{
fps_ptr = &(s->buffer[7]);
mp_header_process_sequence_header(&(spriv->picture), &(s->buffer[4]));
spriv->delta_pts = spriv->nom_delta_pts = parse_fps(spriv->picture.fps);
spriv->delta_clock = (double) 1/fps;
//the 2 lines below are needed to handle non-standard frame rates (such as 18)
if(! spriv->delta_pts)
spriv->delta_pts = spriv->nom_delta_pts = (uint64_t) ((double)27000000.0 * spriv->delta_clock );
mp_msg(MSGT_MUXER, MSGL_DBG2, "\nFPS: %.3f, FRAMETIME: %.3lf\n", fps, (double)1/fps);
if(priv->patch_seq)
patch_seq(priv, s->buffer);
tmp = 12;
if(s->buffer[tmp-1] & 2)
tmp += 64;
if(s->buffer[tmp-1] & 1)
tmp += 64;
if(s->buffer[tmp] == 0 && s->buffer[tmp+1] == 0 && s->buffer[tmp+2] == 1 && s->buffer[tmp+3] == 0xb5)
switch(s->buffer[i+3])
{
se_ptr = &(s->buffer[tmp+4]);
mp_header_process_extension(&(spriv->picture), &(s->buffer[tmp+4]));
}
}
if(spriv->picture.mpeg1 == 0 && priv->patch_sde)
{
while((s->buffer[tmp] != 0 || s->buffer[tmp+1] != 0 || s->buffer[tmp+2] != 1 || s->buffer[tmp+3] != 0xb5 ||
((s->buffer[tmp+4] & 0xf0) != 0x20)) &&
(tmp < len-5))
tmp++;
if(tmp < len-5) //found
patch_panscan(priv, &(s->buffer[tmp+4]));
}
if(s->buffer[3])
{ // Sequence or GOP -- scan for Picture
do_loop: while (ptr < len-5 &&
(s->buffer[ptr] != 0 || s->buffer[ptr+1] != 0 || s->buffer[ptr+2] != 1))
ptr++;
case 0xb3: //sequence
{
if(i + 11 > len)
{
err=1;
break;
}
fps_ptr = &(s->buffer[i+7]);
mp_header_process_sequence_header(&(spriv->picture), &(s->buffer[i+4]));
spriv->delta_pts = spriv->nom_delta_pts = parse_fps(spriv->picture.fps);
spriv->delta_clock = (double) 1/fps;
//the 2 lines below are needed to handle non-standard frame rates (such as 18)
if(! spriv->delta_pts)
spriv->delta_pts = spriv->nom_delta_pts = (uint64_t) ((double)27000000.0 * spriv->delta_clock );
mp_msg(MSGT_MUXER, MSGL_DBG2, "\nFPS: %.3f, FRAMETIME: %.3lf\n", fps, (double)1/fps);
if(priv->patch_seq)
patch_seq(priv, &(s->buffer[i]));
}
break;
if(s->buffer[ptr+3] == 0xb8)
gop_reset = 1;
if(s->buffer[ptr+3]) //not frame
{
ptr++;
goto do_loop;
}
case 0xb5:
if(i + 9 > len)
{
err = 1;
break;
}
mp_header_process_extension(&(spriv->picture), &(s->buffer[i+4]));
if(((s->buffer[i+4] & 0xf0) == 0x20))
{
se_ptr = &(s->buffer[i+4]);
if(priv->patch_sde)
patch_panscan(priv, se_ptr);
}
if((s->buffer[i+4] & 0xf0) == 0x80)
{
pce_ptr = &(s->buffer[i+4]);
}
break;
case 0xb8:
gop_reset = 1;
break;
case 0x00:
if(i + 5 > len)
{
err = 1;
break;
}
pt = (s->buffer[i+5] & 0x1c) >> 3;
temp_ref = (s->buffer[i+4]<<2)+(s->buffer[i+5]>>6);
break;
}
if(err) break; //something went wrong
if(s->buffer[i+3] >= 0x01 && s->buffer[i+3] <= 0xAF) break; //slice, we have already analized what we need
}
if (ptr >= len-5)
{
pt = 0; // Picture not found?!
temp_ref = 0;
mp_msg(MSGT_MUXER, MSGL_ERR,"Warning: picture not found in GOP!\n");
}
else
{
i++;
}
if(err)
mp_msg(MSGT_MUXER, MSGL_ERR,"Warning: picture too short or broken!\n");
//following 2 lines are workaround: lavf doesn't sync to sequence headers before passing demux_packets
if(!spriv->nom_delta_pts)
spriv->delta_pts = spriv->nom_delta_pts = parse_fps(fps);
pt = (s->buffer[ptr+5] & 0x1c) >> 3;
temp_ref = (s->buffer[ptr+4]<<2)+(s->buffer[ptr+5]>>6);
if(!spriv->vframes)
spriv->last_tr = spriv->max_tr = temp_ref;
d1 = temp_ref - spriv->last_tr;
@ -1715,27 +1718,15 @@ static size_t parse_mpeg12_video(muxer_stream_t *s, muxer_priv_t *priv, muxer_he
spriv->last_tr = temp_ref;
if(spriv->picture.mpeg1 == 0)
{
size_t tmp = ptr;
while (ptr < len-5 &&
(s->buffer[ptr] != 0 || s->buffer[ptr+1] != 0 || s->buffer[ptr+2] != 1 || s->buffer[ptr+3] != 0xb5))
ptr++;
if(ptr < len-5)
if(spriv->telecine && pce_ptr)
{
pce_ptr = &(s->buffer[ptr+4]);
if(spriv->telecine)
soft_telecine(priv, spriv, fps_ptr, se_ptr, pce_ptr, frames_diff);
spriv->picture.display_time = 100;
mp_header_process_extension(&(spriv->picture), &(s->buffer[ptr+4]));
mp_header_process_extension(&(spriv->picture), pce_ptr);
if(spriv->picture.display_time >= 50 && spriv->picture.display_time <= 300)
spriv->delta_pts = (spriv->nom_delta_pts * spriv->picture.display_time) / 100;
}
else
spriv->delta_pts = spriv->nom_delta_pts;
ptr = tmp;
}
}
if(! spriv->vframes)
frames_diff = 1;
@ -1776,7 +1767,6 @@ static size_t parse_mpeg12_video(muxer_stream_t *s, muxer_priv_t *priv, muxer_he
}
}
spriv->vframes++;
}
mp_msg(MSGT_MUXER, MSGL_DBG2,"parse_mpeg12_video, return %u\n", (uint32_t) len);
return len;