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unrolling encoding loops

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Originally committed as revision 16879 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Roman Shaposhnik 2009-01-31 01:46:25 +00:00
parent b45ba151cf
commit 77cd35cdb5
1 changed files with 40 additions and 39 deletions
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79
libavcodec/dv.c
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@ -998,9 +998,8 @@ static int dv_encode_video_segment(AVCodecContext *avctx, DVwork_chunk *work_chu
{
DVVideoContext *s = avctx->priv_data;
int mb_index, i, j;
int mb_x, mb_y, c_offset, linesize;
int mb_x, mb_y, c_offset, linesize, y_stride;
uint8_t* y_ptr;
uint8_t* data;
uint8_t* dif;
uint8_t scratch[64];
EncBlockInfo enc_blks[5*DV_MAX_BPM];
@ -1015,56 +1014,58 @@ static int dv_encode_video_segment(AVCodecContext *avctx, DVwork_chunk *work_chu
enc_blk = &enc_blks[0];
for (mb_index = 0; mb_index < 5; mb_index++) {
dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
/* initializing luminance blocks */
if ((s->sys->pix_fmt == PIX_FMT_YUV420P) ||
(s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
(s->sys->height >= 720 && mb_y != 134)) {
y_stride = s->picture.linesize[0] << 3;
} else {
y_stride = 16;
}
y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x) << 3);
linesize = s->picture.linesize[0];
if (s->sys->video_stype == 4) { /* SD 422 */
vs_bit_size +=
dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
dv_init_enc_block(enc_blk+1, NULL , linesize, s, 0) +
dv_init_enc_block(enc_blk+2, y_ptr + 8 , linesize, s, 0) +
dv_init_enc_block(enc_blk+3, NULL , linesize, s, 0);
} else {
vs_bit_size +=
dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) +
dv_init_enc_block(enc_blk+1, y_ptr + 8 , linesize, s, 0) +
dv_init_enc_block(enc_blk+2, y_ptr + y_stride, linesize, s, 0) +
dv_init_enc_block(enc_blk+3, y_ptr + 8 + y_stride, linesize, s, 0);
}
enc_blk += 4;
/* initializing chrominance blocks */
c_offset = (((mb_y >> (s->sys->pix_fmt == PIX_FMT_YUV420P)) * s->picture.linesize[1] +
(mb_x >> ((s->sys->pix_fmt == PIX_FMT_YUV411P) ? 2 : 1))) << 3);
for (j = 0; j < 6; j++) {
if (s->sys->pix_fmt == PIX_FMT_YUV422P) { /* 4:2:2 */
if (j == 0 || j == 2) {
/* Y0 Y1 */
data = y_ptr + ((j >> 1) * 8);
linesize = s->picture.linesize[0];
} else if (j > 3) {
/* Cr Cb */
data = s->picture.data[6 - j] + c_offset;
linesize = s->picture.linesize[6 - j];
} else {
/* j=1 and j=3 are "dummy" blocks, used for AC data only */
data = NULL;
linesize = 0;
}
} else { /* 4:1:1 or 4:2:0 */
if (j < 4) { /* Four Y blocks */
/* NOTE: at end of line, the macroblock is handled as 420 */
if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x < (704 / 8)) {
data = y_ptr + (j * 8);
} else {
data = y_ptr + ((j & 1) * 8) + ((j >> 1) * 8 * s->picture.linesize[0]);
}
linesize = s->picture.linesize[0];
} else { /* Cr and Cb blocks */
/* don't ask Fabrice why they inverted Cb and Cr ! */
data = s->picture.data [6 - j] + c_offset;
linesize = s->picture.linesize[6 - j];
for (j = 2; j; j--) {
uint8_t *c_ptr = s->picture.data[j] + c_offset;
linesize = s->picture.linesize[j];
y_stride = (mb_y == 134) ? 8 : (s->picture.linesize[j] << 3);
if (s->sys->pix_fmt == PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
uint8_t* d;
uint8_t* b = scratch;
for (i = 0; i < 8; i++) {
d = data + 8 * linesize;
b[0] = data[0]; b[1] = data[1]; b[2] = data[2]; b[3] = data[3];
d = c_ptr + (linesize << 3);
b[0] = c_ptr[0]; b[1] = c_ptr[1]; b[2] = c_ptr[2]; b[3] = c_ptr[3];
b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3];
data += linesize;
c_ptr += linesize;
b += 8;
}
data = scratch;
c_ptr = scratch;
linesize = 8;
}
}
vs_bit_size += dv_init_enc_block( enc_blk++, c_ptr , linesize, s, 1);
if (s->sys->bpm == 8) {
vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride, linesize, s, 1);
}
vs_bit_size += dv_init_enc_block(enc_blk, data, linesize, s, j>>2);
++enc_blk;
}
}