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remove unneeded length checks 

Originally committed as revision 18834 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2009-05-15 04:43:44 +00:00
parent 357ec71f09
commit 58a830239d
1 changed files with 1 additions and 5 deletions
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6
libavformat/mxfenc.c
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@ -1308,7 +1308,7 @@ static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt
for(i = 0; i < pkt->size - 4; i++) {
c = (c<<8) + pkt->data[i];
if (c == 0x1B5) {
if (i + 2 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
if ((pkt->data[i+1] & 0xf0) == 0x10) { // seq ext
st->codec->profile = pkt->data[i+1] & 0x07;
st->codec->level = pkt->data[i+2] >> 4;
} else if (i + 5 < pkt->size && (pkt->data[i+1] & 0xf0) == 0x80) { // pict coding ext
@ -1316,7 +1316,6 @@ static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt
break;
}
} else if (c == 0x1b8) { // gop
if (i + 4 < pkt->size) {
if (pkt->data[i+4]>>6 & 0x01) // closed
*flags |= 0x80; // random access
if (!mxf->header_written) {
@ -1334,10 +1333,8 @@ static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt
av_log(s, AV_LOG_DEBUG, "frame %d %d:%d:%d%c%d\n", mxf->timecode_start,
hours, minutes, seconds, mxf->timecode_drop_frame ? ';':':', frames);
}
}
} else if (c == 0x1b3) { // seq
*flags |= 0x40;
if (i + 4 < pkt->size) {
switch ((pkt->data[i+4]>>4) & 0xf) {
case 2: sc->aspect_ratio = (AVRational){ 4, 3}; break;
case 3: sc->aspect_ratio = (AVRational){ 16, 9}; break;
@ -1346,7 +1343,6 @@ static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt
av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,
st->codec->width, st->codec->height, 1024*1024);
}
}
} else if (c == 0x100) { // pic
int pict_type = (pkt->data[i+2]>>3) & 0x07;
if (pict_type == 2) { // P frame