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libtriple: improve cPlayback performance

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avoid unnecessary memcpy in read_mpeg(), significantly improving performance


Origin commit data
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Branch: master
Commit: 2ba4fe17c7
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2012-01-15 (Sun, 15 Jan 2012)



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This commit was generated by Migit
This commit is contained in:
Stefan Seyfried
2012-01-15 19:55:10 +01:00
parent 31a52ce4f6
commit 098eba57f0
1 changed files with 3 additions and 10 deletions
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13
libtriple/playback_td.cpp
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@@ -1167,11 +1167,6 @@ ssize_t cPlayback::read_mpeg()
if (count + pesPacketLen >= pesbuf_pos) if (count + pesPacketLen >= pesbuf_pos)
{ {
lt_debug("buffer len: %ld, pesPacketLen: %d :-(\n", pesbuf_pos - count, pesPacketLen); lt_debug("buffer len: %ld, pesPacketLen: %d :-(\n", pesbuf_pos - count, pesPacketLen);
if (count != 0)
{
memmove(pesbuf, ppes, pesbuf_pos - count);
pesbuf_pos -= count;
}
break; break;
} }
@@ -1179,8 +1174,6 @@ ssize_t cPlayback::read_mpeg()
if ((tsPacksCount + 1) * 188 > INBUF_SIZE - inbuf_pos) if ((tsPacksCount + 1) * 188 > INBUF_SIZE - inbuf_pos)
{ {
lt_info("not enough size in inbuf (needed %d, got %d)\n", (tsPacksCount + 1) * 188, INBUF_SIZE - inbuf_pos); lt_info("not enough size in inbuf (needed %d, got %d)\n", (tsPacksCount + 1) * 188, INBUF_SIZE - inbuf_pos);
memmove(pesbuf, ppes, pesbuf_pos - count);
pesbuf_pos -= count;
break; break;
} }
@@ -1223,10 +1216,10 @@ ssize_t cPlayback::read_mpeg()
} }
} //if (av) } //if (av)
memmove(pesbuf, ppes + pesPacketLen, pesbuf_pos - count - pesPacketLen); count += pesPacketLen;
pesbuf_pos -= count + pesPacketLen;
count = 0; /* we shifted everything to the start of the buffer => offset == 0 */
} }
memmove(pesbuf, pesbuf + count, pesbuf_pos - count);
pesbuf_pos -= count;
return ret; return ret;
} }