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Multiple-resolution encoder

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The example encoder down-samples the input video frames a number of
times with a down-sampling factor, and then encodes and outputs
bitstreams with different resolutions.

Support arbitrary down-sampling factor, and down-sampling factor
can be different for each encoding level.

For example, the encoder can be tested as follows.
1. Configure with multi-resolution encoding enabled:
../libvpx/configure --target=x86-linux-gcc --disable-codecs
--enable-vp8 --enable-runtime_cpu_detect --enable-debug
--disable-install-docs --enable-error-concealment
--enable-multi-res-encoding
2. Run make
3. Encode:
If input video is 1280x720, run:
./vp8_multi_resolution_encoder 1280 720 input.yuv 1.ivf 2.ivf 3.ivf 1
(output: 1.ivf(1280x720); 2.ivf(640x360); 3.ivf(320x180).
The last parameter is set to 1/0 to show/not show PSNR.)
4. Decode:
./simple_decoder 1.ivf 1.yuv
./simple_decoder 2.ivf 2.yuv
./simple_decoder 3.ivf 3.yuv
5. View video:
mplayer 1.yuv -demuxer rawvideo -rawvideo w=1280:h=720 -loop 0 -fps 30
mplayer 2.yuv -demuxer rawvideo -rawvideo w=640:h=360 -loop 0 -fps 30
mplayer 3.yuv -demuxer rawvideo -rawvideo w=320:h=180 -loop 0 -fps 30

The encoding parameters can be modified in vp8_multi_resolution_encoder.c,
for example, target bitrate, frame rate...

Modified API. John helped a lot with that. Thanks!

Change-Id: I03be9a51167eddf94399f92d269599fb3f3d54f5
This commit is contained in:
Yunqing Wang
2011-10-25 15:14:16 -04:00
parent 6127af60c1
commit aa7335e610
31 changed files with 6057 additions and 88 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
vp8/encoder/encodeframe.c
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@@ -49,8 +49,8 @@ extern void vp8cx_init_mbrthread_data(VP8_COMP *cpi,
int count);
void vp8_build_block_offsets(MACROBLOCK *x);
void vp8_setup_block_ptrs(MACROBLOCK *x);
int vp8cx_encode_inter_macroblock(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t, int recon_yoffset, int recon_uvoffset);
int vp8cx_encode_intra_macro_block(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t);
int vp8cx_encode_inter_macroblock(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t, int recon_yoffset, int recon_uvoffset, int mb_row, int mb_col);
int vp8cx_encode_intra_macro_block(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t, int mb_row, int mb_col);
static void adjust_act_zbin( VP8_COMP *cpi, MACROBLOCK *x );
#ifdef MODE_STATS
@@ -475,14 +475,14 @@ void encode_mb_row(VP8_COMP *cpi,
if (cm->frame_type == KEY_FRAME)
{
*totalrate += vp8cx_encode_intra_macro_block(cpi, x, tp);
*totalrate += vp8cx_encode_intra_macro_block(cpi, x, tp, mb_row, mb_col);
#ifdef MODE_STATS
y_modes[xd->mbmi.mode] ++;
#endif
}
else
{
*totalrate += vp8cx_encode_inter_macroblock(cpi, x, tp, recon_yoffset, recon_uvoffset);
*totalrate += vp8cx_encode_inter_macroblock(cpi, x, tp, recon_yoffset, recon_uvoffset, mb_row, mb_col);
#ifdef MODE_STATS
inter_y_modes[xd->mbmi.mode] ++;
@@ -1142,7 +1142,7 @@ static void adjust_act_zbin( VP8_COMP *cpi, MACROBLOCK *x )
#endif
}
int vp8cx_encode_intra_macro_block(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t)
int vp8cx_encode_intra_macro_block(VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t, int mb_row, int mb_col)
{
int rate;
@@ -1182,7 +1182,8 @@ extern void vp8_fix_contexts(MACROBLOCKD *x);
int vp8cx_encode_inter_macroblock
(
VP8_COMP *cpi, MACROBLOCK *x, TOKENEXTRA **t,
int recon_yoffset, int recon_uvoffset
int recon_yoffset, int recon_uvoffset,
int mb_row, int mb_col
)
{
MACROBLOCKD *const xd = &x->e_mbd;
@@ -1230,8 +1231,25 @@ int vp8cx_encode_inter_macroblock
}
else
{
#if CONFIG_MULTI_RES_ENCODING
if (cpi->oxcf.mr_encoder_id == 0)
{
/* Lowest-resolution encoding */
vp8_pick_inter_mode(cpi, x, recon_yoffset, recon_uvoffset, &rate,
&distortion, &intra_error);
}else
{
/* Higher-resolution encoding */
vp8_mr_pick_inter_mode(cpi, x, recon_yoffset, recon_uvoffset, &rate,
&distortion, &intra_error, mb_row, mb_col);
}
#else
vp8_pick_inter_mode(cpi, x, recon_yoffset, recon_uvoffset, &rate,
&distortion, &intra_error);
#endif
}
cpi->prediction_error += distortion;
cpi->intra_error += intra_error;