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ffmpeg.wasm-core
Commit 1f7c1d14 authored by Diego Biurrun's avatar Diego Biurrun
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whitespace cosmetics: consistently format all comments 

Originally committed as revision 17266 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent d15876d3
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Showing with 34 additions and 35 deletions
libavcodec/mpegvideo_xvmc.c
View file @ 1f7c1d14
......@@ -39,7 +39,7 @@ void ff_xvmc_init_block(MpegEncContext *s)
assert(render);
if (!render || render->magic != AV_XVMC_RENDER_MAGIC) {
assert(0);
return;//make sure that this is a render packet
return; // make sure that this is a render packet
}
s->block = (DCTELEM *)(render->data_blocks + render->next_free_data_block_num * 64);
}
......@@ -60,8 +60,8 @@ void ff_xvmc_pack_pblocks(MpegEncContext *s, int cbp)
}
}
//These functions should be called on every new field and/or frame.
//They should be safe if they are called a few times for the same field!
// These functions should be called on every new field and/or frame.
// They should be safe if they are called a few times for the same field!
int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
{
struct xvmc_render_state * render, * last, * next;
......@@ -71,12 +71,12 @@ int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
render = (struct xvmc_render_state*)s->current_picture.data[2];
assert(render);
if (!render || render->magic != AV_XVMC_RENDER_MAGIC)
return -1;//make sure that this is render packet
return -1; // make sure that this is render packet
render->picture_structure = s->picture_structure;
render->flags = s->first_field ? 0 : XVMC_SECOND_FIELD;
//make sure that all data is drawn by XVMC_end_frame
// make sure that all data is drawn by XVMC_end_frame
assert(render->filled_mv_blocks_num == 0);
render->p_future_surface = NULL;
......@@ -84,7 +84,7 @@ int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
switch(s->pict_type){
case FF_I_TYPE:
return 0;// no prediction from other frames
return 0; // no prediction from other frames
case FF_B_TYPE:
next = (struct xvmc_render_state*)s->next_picture.data[2];
assert(next);
......@@ -93,11 +93,11 @@ int ff_xvmc_field_start(MpegEncContext*s, AVCodecContext *avctx)
if (next->magic != AV_XVMC_RENDER_MAGIC)
return -1;
render->p_future_surface = next->p_surface;
//no return here, going to set forward prediction
// no return here, going to set forward prediction
case FF_P_TYPE:
last = (struct xvmc_render_state*)s->last_picture.data[2];
if (!last)// && !s->first_field)
last = render;//predict second field from the first
if (!last) // && !s->first_field)
last = render; // predict second field from the first
if (last->magic != AV_XVMC_RENDER_MAGIC)
return -1;
render->p_past_surface = last->p_surface;
......@@ -131,15 +131,14 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
return;
}
//from MPV_decode_mb(),
/* update DC predictors for P macroblocks */
// from MPV_decode_mb(), update DC predictors for P macroblocks
if (!s->mb_intra) {
s->last_dc[0] =
s->last_dc[1] =
s->last_dc[2] = 128 << s->intra_dc_precision;
}
//MC doesn't skip blocks
// MC doesn't skip blocks
s->mb_skipped = 0;
......@@ -147,21 +146,21 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
// Anyway, it doesn't hurt.
s->current_picture.qscale_table[mb_xy] = s->qscale;
//START OF XVMC specific code
// START OF XVMC specific code
render = (struct xvmc_render_state*)s->current_picture.data[2];
assert(render);
assert(render->magic==AV_XVMC_RENDER_MAGIC);
assert(render->mv_blocks);
//take the next free macroblock
// take the next free macroblock
mv_block = &render->mv_blocks[render->start_mv_blocks_num +
render->filled_mv_blocks_num ];
mv_block->x = s->mb_x;
mv_block->y = s->mb_y;
mv_block->dct_type = s->interlaced_dct;//XVMC_DCT_TYPE_FRAME/FIELD;
mv_block->dct_type = s->interlaced_dct; // XVMC_DCT_TYPE_FRAME/FIELD;
if (s->mb_intra) {
mv_block->macroblock_type = XVMC_MB_TYPE_INTRA;//no MC, all done
mv_block->macroblock_type = XVMC_MB_TYPE_INTRA; // no MC, all done
} else {
mv_block->macroblock_type = XVMC_MB_TYPE_PATTERN;
......@@ -201,21 +200,21 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
mv_block->motion_type = XVMC_PREDICTION_DUAL_PRIME;
if (s->picture_structure == PICT_FRAME) {
mv_block->PMV[0][0][0] = s->mv[0][0][0];//top from top
mv_block->PMV[0][0][0] = s->mv[0][0][0]; // top from top
mv_block->PMV[0][0][1] = s->mv[0][0][1]<<1;
mv_block->PMV[0][1][0] = s->mv[0][0][0];//bottom from bottom
mv_block->PMV[0][1][0] = s->mv[0][0][0]; // bottom from bottom
mv_block->PMV[0][1][1] = s->mv[0][0][1]<<1;
mv_block->PMV[1][0][0] = s->mv[0][2][0];//dmv00, top from bottom
mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1;//dmv01
mv_block->PMV[1][0][0] = s->mv[0][2][0]; // dmv00, top from bottom
mv_block->PMV[1][0][1] = s->mv[0][2][1]<<1; // dmv01
mv_block->PMV[1][1][0] = s->mv[0][3][0];//dmv10, bottom from top
mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1;//dmv11
mv_block->PMV[1][1][0] = s->mv[0][3][0]; // dmv10, bottom from top
mv_block->PMV[1][1][1] = s->mv[0][3][1]<<1; // dmv11
} else {
mv_block->PMV[0][1][0] = s->mv[0][2][0];//dmv00
mv_block->PMV[0][1][1] = s->mv[0][2][1];//dmv01
mv_block->PMV[0][1][0] = s->mv[0][2][0]; // dmv00
mv_block->PMV[0][1][1] = s->mv[0][2][1]; // dmv01
}
break;
default:
......@@ -224,15 +223,15 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
mv_block->motion_vertical_field_select = 0;
//set correct field references
// set correct field references
if (s->mv_type == MV_TYPE_FIELD || s->mv_type == MV_TYPE_16X8) {
mv_block->motion_vertical_field_select |= s->field_select[0][0];
mv_block->motion_vertical_field_select |= s->field_select[1][0]<<1;
mv_block->motion_vertical_field_select |= s->field_select[0][1]<<2;
mv_block->motion_vertical_field_select |= s->field_select[1][1]<<3;
}
}//!intra
//time to handle data blocks;
} // !intra
// time to handle data blocks;
mv_block->index = render->next_free_data_block_num;
blocks_per_mb = 6;
......@@ -240,7 +239,7 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
blocks_per_mb = 4 + (1 << s->chroma_format);
}
// calculate cbp
// calculate cbp
cbp = 0;
for (i = 0; i < blocks_per_mb; i++) {
cbp += cbp;
......@@ -249,15 +248,15 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
}
if (s->flags & CODEC_FLAG_GRAY) {
if (s->mb_intra) {//intra frames are always full chroma block
if (s->mb_intra) { // intra frames are always full chroma block
for (i = 4; i < blocks_per_mb; i++) {
memset(s->pblocks[i],0,sizeof(short)*8*8);//so we need to clear them
memset(s->pblocks[i],0,sizeof(short)*8*8); // so we need to clear them
if (!render->unsigned_intra)
s->pblocks[i][0] = 1 << 10;
}
} else {
cbp &= 0xf << (blocks_per_mb - 4);
blocks_per_mb = 4;//luminance blocks only
blocks_per_mb = 4; // luminance blocks only
}
}
mv_block->coded_block_pattern = cbp;
......@@ -271,11 +270,11 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
s->pblocks[i][0] -= 1 << 10;
if (!render->idct) {
s->dsp.idct(s->pblocks[i]);
/*It is unclear if MC hardware requires pixel diff values to be in
range [-255;255]. TODO cliping if such hardware is ever found.
As of now it would only be unnecessery slowdown. */
/* It is unclear if MC hardware requires pixel diff values to be in
* range [-255;255]. TODO cliping if such hardware is ever found.
* As of now it would only be unnecessery slowdown. */
}
//copy blocks only if the codec doesn't support pblocks reordering
// copy blocks only if the codec doesn't support pblocks reordering
if (s->avctx->xvmc_acceleration == 1) {
memcpy(&render->data_blocks[render->next_free_data_block_num*64],
s->pblocks[i],sizeof(short)*8*8);
......
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