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rl2: cosmetics, reformat

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This commit is contained in:
Anton Khirnov 2012-11-17 07:45:05 +01:00
parent 3c6e5a840c
commit 6781b5315e
1 changed files with 42 additions and 40 deletions
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82
libavcodec/rl2.c
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@ -66,60 +66,60 @@ static void rl2_rle_decode(Rl2Context *s, const uint8_t *in, int size,
int stride_adj = stride - s->avctx->width;
int i;
const uint8_t *back_frame = s->back_frame;
const uint8_t *in_end = in + size;
const uint8_t *out_end = out + stride * s->avctx->height;
const uint8_t *in_end = in + size;
const uint8_t *out_end = out + stride * s->avctx->height;
uint8_t *line_end;
/** copy start of the background frame */
for(i=0;i<=base_y;i++){
if(s->back_frame)
memcpy(out,back_frame,s->avctx->width);
out += stride;
for (i = 0; i <= base_y; i++) {
if (s->back_frame)
memcpy(out, back_frame, s->avctx->width);
out += stride;
back_frame += s->avctx->width;
}
back_frame += base_x - s->avctx->width;
line_end = out - stride_adj;
out += base_x - stride;
line_end = out - stride_adj;
out += base_x - stride;
/** decode the variable part of the frame */
while(in < in_end){
while (in < in_end) {
uint8_t val = *in++;
int len = 1;
if(val >= 0x80){
if(in >= in_end)
int len = 1;
if (val >= 0x80) {
if (in >= in_end)
break;
len = *in++;
if(!len)
if (!len)
break;
}
if(len >= out_end - out)
if (len >= out_end - out)
break;
if(s->back_frame)
if (s->back_frame)
val |= 0x80;
else
val &= ~0x80;
while(len--){
*out++ = (val == 0x80)? *back_frame:val;
while (len--) {
*out++ = (val == 0x80) ? *back_frame : val;
back_frame++;
if(out == line_end){
out += stride_adj;
if (out == line_end) {
out += stride_adj;
line_end += stride;
if(len >= out_end - out)
if (len >= out_end - out)
break;
}
}
}
/** copy the rest from the background frame */
if(s->back_frame){
while(out < out_end){
if (s->back_frame) {
while (out < out_end) {
memcpy(out, back_frame, line_end - out);
back_frame += line_end - out;
out = line_end + stride_adj;
line_end += stride;
out = line_end + stride_adj;
line_end += stride;
}
}
}
@ -135,37 +135,38 @@ static av_cold int rl2_decode_init(AVCodecContext *avctx)
Rl2Context *s = avctx->priv_data;
int back_size;
int i;
s->avctx = avctx;
s->avctx = avctx;
avctx->pix_fmt = AV_PIX_FMT_PAL8;
/** parse extra data */
if(!avctx->extradata || avctx->extradata_size < EXTRADATA1_SIZE){
if (!avctx->extradata || avctx->extradata_size < EXTRADATA1_SIZE) {
av_log(avctx, AV_LOG_ERROR, "invalid extradata size\n");
return AVERROR(EINVAL);
}
/** get frame_offset */
s->video_base = AV_RL16(&avctx->extradata[0]);
s->clr_count = AV_RL32(&avctx->extradata[2]);
s->clr_count = AV_RL32(&avctx->extradata[2]);
if(s->video_base >= avctx->width * avctx->height){
if (s->video_base >= avctx->width * avctx->height) {
av_log(avctx, AV_LOG_ERROR, "invalid video_base\n");
return AVERROR_INVALIDDATA;
}
/** initialize palette */
for(i=0;i<AVPALETTE_COUNT;i++)
for (i = 0; i < AVPALETTE_COUNT; i++)
s->palette[i] = AV_RB24(&avctx->extradata[6 + i * 3]);
/** decode background frame if present */
back_size = avctx->extradata_size - EXTRADATA1_SIZE;
if(back_size > 0){
if (back_size > 0) {
uint8_t *back_frame = av_mallocz(avctx->width*avctx->height);
if(!back_frame)
if (!back_frame)
return AVERROR(ENOMEM);
rl2_rle_decode(s,avctx->extradata + EXTRADATA1_SIZE,back_size,
back_frame,avctx->width,0);
rl2_rle_decode(s, avctx->extradata + EXTRADATA1_SIZE, back_size,
back_frame, avctx->width, 0);
s->back_frame = back_frame;
}
return 0;
@ -173,25 +174,26 @@ static av_cold int rl2_decode_init(AVCodecContext *avctx)
static int rl2_decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int ret, buf_size = avpkt->size;
int ret, buf_size = avpkt->size;
Rl2Context *s = avctx->priv_data;
if(s->frame.data[0])
if (s->frame.data[0])
avctx->release_buffer(avctx, &s->frame);
/** get buffer */
s->frame.reference= 0;
s->frame.reference = 0;
if ((ret = ff_get_buffer(avctx, &s->frame)) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
/** run length decode */
rl2_rle_decode(s,buf,buf_size,s->frame.data[0],s->frame.linesize[0],s->video_base);
rl2_rle_decode(s, buf, buf_size, s->frame.data[0], s->frame.linesize[0],
s->video_base);
/** make the palette available on the way out */
memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
@ -213,7 +215,7 @@ static av_cold int rl2_decode_end(AVCodecContext *avctx)
{
Rl2Context *s = avctx->priv_data;
if(s->frame.data[0])
if (s->frame.data[0])
avctx->release_buffer(avctx, &s->frame);
av_free(s->back_frame);