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Code Issues Releases Activity

shorter variable names

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Originally committed as revision 8671 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-04-07 23:30:47 +00:00
parent bbbd775714
commit 43769d722a
1 changed files with 20 additions and 20 deletions
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40
libavcodec/bethsoftvideo.c
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@ -62,18 +62,18 @@ static int bethsoftvid_decode_frame(AVCodecContext *avctx,
{ {
BethsoftvidContext * vid = avctx->priv_data; BethsoftvidContext * vid = avctx->priv_data;
char block_type; char block_type;
uint8_t * destination; uint8_t * dst;
uint8_t * frame_end; uint8_t * frame_end;
int line_remaining = avctx->width; // number of bytes remaining on a line int remaining = avctx->width; // number of bytes remaining on a line
const int wrap_to_next_line = vid->frame.linesize[0] - avctx->width; const int wrap_to_next_line = vid->frame.linesize[0] - avctx->width;
int rle_num_bytes; int code;
int yoffset; int yoffset;
if (avctx->reget_buffer(avctx, &vid->frame)) { if (avctx->reget_buffer(avctx, &vid->frame)) {
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return -1; return -1;
} }
destination = vid->frame.data[0]; dst = vid->frame.data[0];
frame_end = vid->frame.data[0] + vid->frame.linesize[0] * avctx->height; frame_end = vid->frame.data[0] + vid->frame.linesize[0] * avctx->height;
switch(block_type = *buf++){ switch(block_type = *buf++){
@ -84,33 +84,33 @@ static int bethsoftvid_decode_frame(AVCodecContext *avctx,
yoffset = bytestream_get_le16(&buf); yoffset = bytestream_get_le16(&buf);
if(yoffset >= avctx->height) if(yoffset >= avctx->height)
return -1; return -1;
destination += vid->frame.linesize[0] * yoffset; dst += vid->frame.linesize[0] * yoffset;
} }
// main code // main code
while((rle_num_bytes = *buf++)){ while((code = *buf++)){
int length = rle_num_bytes & 0x7f; int length = code & 0x7f;
// copy any bytes starting at the current position, and ending at the frame width // copy any bytes starting at the current position, and ending at the frame width
while(length > line_remaining){ while(length > remaining){
if(rle_num_bytes < 0x80) if(code < 0x80)
bytestream_get_buffer(&buf, destination, line_remaining); bytestream_get_buffer(&buf, dst, remaining);
else if(block_type == VIDEO_I_FRAME) else if(block_type == VIDEO_I_FRAME)
memset(destination, buf[0], line_remaining); memset(dst, buf[0], remaining);
length -= line_remaining; // decrement the number of bytes to be copied length -= remaining; // decrement the number of bytes to be copied
destination += line_remaining + wrap_to_next_line; // skip over extra bytes at end of frame dst += remaining + wrap_to_next_line; // skip over extra bytes at end of frame
line_remaining = avctx->width; remaining = avctx->width;
if(destination == frame_end) if(dst == frame_end)
goto end; goto end;
} }
// copy any remaining bytes after / if line overflows // copy any remaining bytes after / if line overflows
if(rle_num_bytes < 0x80) if(code < 0x80)
bytestream_get_buffer(&buf, destination, length); bytestream_get_buffer(&buf, dst, length);
else if(block_type == VIDEO_I_FRAME) else if(block_type == VIDEO_I_FRAME)
memset(destination, *buf++, length); memset(dst, *buf++, length);
line_remaining -= length; remaining -= length;
destination += length; dst += length;
} }
end: end: