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libaomenc: Add support for tiles

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Adds an option to specify the number of tile rows and columns, then uses
a uniform tiling if possible and otherwise a fixed tiling with equal-sized
tiles to fill the frame.

Also adds -tile-columns and -tile-rows options to make tilings with
power-of-two numbers of tiles, matching the behaviour of the libvpx/VP9
encoder.
This commit is contained in:
Mark Thompson 2018-10-22 23:40:07 +01:00
parent 0c8b5cb369
commit 7070955d43
1 changed files with 188 additions and 0 deletions
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188
libavcodec/libaomenc.c
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@ -34,6 +34,7 @@
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "av1.h"
#include "avcodec.h"
#include "internal.h"
#include "profiles.h"
@ -74,6 +75,10 @@ typedef struct AOMEncoderContext {
uint64_t sse[4];
int have_sse; /**< true if we have pending sse[] */
uint64_t frame_number;
int tile_cols, tile_rows;
int tile_cols_log2, tile_rows_log2;
aom_superblock_size_t superblock_size;
int uniform_tiles;
} AOMContext;
static const char *const ctlidstr[] = {
@ -85,6 +90,9 @@ static const char *const ctlidstr[] = {
[AV1E_SET_COLOR_PRIMARIES] = "AV1E_SET_COLOR_PRIMARIES",
[AV1E_SET_MATRIX_COEFFICIENTS] = "AV1E_SET_MATRIX_COEFFICIENTS",
[AV1E_SET_TRANSFER_CHARACTERISTICS] = "AV1E_SET_TRANSFER_CHARACTERISTICS",
[AV1E_SET_SUPERBLOCK_SIZE] = "AV1E_SET_SUPERBLOCK_SIZE",
[AV1E_SET_TILE_COLUMNS] = "AV1E_SET_TILE_COLUMNS",
[AV1E_SET_TILE_ROWS] = "AV1E_SET_TILE_ROWS",
};
static av_cold void log_encoder_error(AVCodecContext *avctx, const char *desc)
@ -149,6 +157,10 @@ static av_cold void dump_enc_cfg(AVCodecContext *avctx,
width, "kf_mode:", cfg->kf_mode,
width, "kf_min_dist:", cfg->kf_min_dist,
width, "kf_max_dist:", cfg->kf_max_dist);
av_log(avctx, level, "tile settings\n"
" %*s%d\n %*s%d\n",
width, "tile_width_count:", cfg->tile_width_count,
width, "tile_height_count:", cfg->tile_height_count);
av_log(avctx, level, "\n");
}
@ -290,6 +302,169 @@ static void set_color_range(AVCodecContext *avctx)
codecctl_int(avctx, AV1E_SET_COLOR_RANGE, aom_cr);
}
static int count_uniform_tiling(int dim, int sb_size, int tiles_log2)
{
int sb_dim = (dim + sb_size - 1) / sb_size;
int tile_dim = (sb_dim + (1 << tiles_log2) - 1) >> tiles_log2;
av_assert0(tile_dim > 0);
return (sb_dim + tile_dim - 1) / tile_dim;
}
static int choose_tiling(AVCodecContext *avctx,
struct aom_codec_enc_cfg *enccfg)
{
AOMContext *ctx = avctx->priv_data;
int sb_128x128_possible, sb_size, sb_width, sb_height;
int uniform_rows, uniform_cols;
int uniform_64x64_possible, uniform_128x128_possible;
int tile_size, rounding, i;
if (ctx->tile_cols_log2 >= 0)
ctx->tile_cols = 1 << ctx->tile_cols_log2;
if (ctx->tile_rows_log2 >= 0)
ctx->tile_rows = 1 << ctx->tile_rows_log2;
if (ctx->tile_cols == 0) {
ctx->tile_cols = (avctx->width + AV1_MAX_TILE_WIDTH - 1) /
AV1_MAX_TILE_WIDTH;
if (ctx->tile_cols > 1) {
av_log(avctx, AV_LOG_DEBUG, "Automatically using %d tile "
"columns to fill width.\n", ctx->tile_cols);
}
}
av_assert0(ctx->tile_cols > 0);
if (ctx->tile_rows == 0) {
int max_tile_width =
FFALIGN((FFALIGN(avctx->width, 128) +
ctx->tile_cols - 1) / ctx->tile_cols, 128);
ctx->tile_rows =
(max_tile_width * FFALIGN(avctx->height, 128) +
AV1_MAX_TILE_AREA - 1) / AV1_MAX_TILE_AREA;
if (ctx->tile_rows > 1) {
av_log(avctx, AV_LOG_DEBUG, "Automatically using %d tile "
"rows to fill area.\n", ctx->tile_rows);
}
}
av_assert0(ctx->tile_rows > 0);
if ((avctx->width + 63) / 64 < ctx->tile_cols ||
(avctx->height + 63) / 64 < ctx->tile_rows) {
av_log(avctx, AV_LOG_ERROR, "Invalid tile sizing: frame not "
"large enough to fit specified tile arrangement.\n");
return AVERROR(EINVAL);
}
if (ctx->tile_cols > AV1_MAX_TILE_COLS ||
ctx->tile_rows > AV1_MAX_TILE_ROWS) {
av_log(avctx, AV_LOG_ERROR, "Invalid tile sizing: AV1 does "
"not allow more than %dx%d tiles.\n",
AV1_MAX_TILE_COLS, AV1_MAX_TILE_ROWS);
return AVERROR(EINVAL);
}
if (avctx->width / ctx->tile_cols > AV1_MAX_TILE_WIDTH) {
av_log(avctx, AV_LOG_ERROR, "Invalid tile sizing: AV1 does "
"not allow tiles of width greater than %d.\n",
AV1_MAX_TILE_WIDTH);
return AVERROR(EINVAL);
}
ctx->superblock_size = AOM_SUPERBLOCK_SIZE_DYNAMIC;
if (ctx->tile_cols == 1 && ctx->tile_rows == 1) {
av_log(avctx, AV_LOG_DEBUG, "Using a single tile.\n");
return 0;
}
sb_128x128_possible =
(avctx->width + 127) / 128 >= ctx->tile_cols &&
(avctx->height + 127) / 128 >= ctx->tile_rows;
ctx->tile_cols_log2 = ctx->tile_cols == 1 ? 0 :
av_log2(ctx->tile_cols - 1) + 1;
ctx->tile_rows_log2 = ctx->tile_rows == 1 ? 0 :
av_log2(ctx->tile_rows - 1) + 1;
uniform_cols = count_uniform_tiling(avctx->width,
64, ctx->tile_cols_log2);
uniform_rows = count_uniform_tiling(avctx->height,
64, ctx->tile_rows_log2);
av_log(avctx, AV_LOG_DEBUG, "Uniform with 64x64 superblocks "
"-> %dx%d tiles.\n", uniform_cols, uniform_rows);
uniform_64x64_possible = uniform_cols == ctx->tile_cols &&
uniform_rows == ctx->tile_rows;
if (sb_128x128_possible) {
uniform_cols = count_uniform_tiling(avctx->width,
128, ctx->tile_cols_log2);
uniform_rows = count_uniform_tiling(avctx->height,
128, ctx->tile_rows_log2);
av_log(avctx, AV_LOG_DEBUG, "Uniform with 128x128 superblocks "
"-> %dx%d tiles.\n", uniform_cols, uniform_rows);
uniform_128x128_possible = uniform_cols == ctx->tile_cols &&
uniform_rows == ctx->tile_rows;
} else {
av_log(avctx, AV_LOG_DEBUG, "128x128 superblocks not possible.\n");
uniform_128x128_possible = 0;
}
ctx->uniform_tiles = 1;
if (uniform_64x64_possible && uniform_128x128_possible) {
av_log(avctx, AV_LOG_DEBUG, "Using uniform tiling with dynamic "
"superblocks (tile_cols_log2 = %d, tile_rows_log2 = %d).\n",
ctx->tile_cols_log2, ctx->tile_rows_log2);
return 0;
}
if (uniform_64x64_possible && !sb_128x128_possible) {
av_log(avctx, AV_LOG_DEBUG, "Using uniform tiling with 64x64 "
"superblocks (tile_cols_log2 = %d, tile_rows_log2 = %d).\n",
ctx->tile_cols_log2, ctx->tile_rows_log2);
ctx->superblock_size = AOM_SUPERBLOCK_SIZE_64X64;
return 0;
}
if (uniform_128x128_possible) {
av_log(avctx, AV_LOG_DEBUG, "Using uniform tiling with 128x128 "
"superblocks (tile_cols_log2 = %d, tile_rows_log2 = %d).\n",
ctx->tile_cols_log2, ctx->tile_rows_log2);
ctx->superblock_size = AOM_SUPERBLOCK_SIZE_128X128;
return 0;
}
ctx->uniform_tiles = 0;
if (sb_128x128_possible) {
sb_size = 128;
ctx->superblock_size = AOM_SUPERBLOCK_SIZE_128X128;
} else {
sb_size = 64;
ctx->superblock_size = AOM_SUPERBLOCK_SIZE_64X64;
}
av_log(avctx, AV_LOG_DEBUG, "Using fixed tiling with %dx%d "
"superblocks (tile_cols = %d, tile_rows = %d).\n",
sb_size, sb_size, ctx->tile_cols, ctx->tile_rows);
enccfg->tile_width_count = ctx->tile_cols;
enccfg->tile_height_count = ctx->tile_rows;
sb_width = (avctx->width + sb_size - 1) / sb_size;
sb_height = (avctx->height + sb_size - 1) / sb_size;
tile_size = sb_width / ctx->tile_cols;
rounding = sb_width % ctx->tile_cols;
for (i = 0; i < ctx->tile_cols; i++) {
enccfg->tile_widths[i] = tile_size +
(i < rounding / 2 ||
i > ctx->tile_cols - 1 - (rounding + 1) / 2);
}
tile_size = sb_height / ctx->tile_rows;
rounding = sb_height % ctx->tile_rows;
for (i = 0; i < ctx->tile_rows; i++) {
enccfg->tile_heights[i] = tile_size +
(i < rounding / 2 ||
i > ctx->tile_rows - 1 - (rounding + 1) / 2);
}
return 0;
}
static av_cold int aom_init(AVCodecContext *avctx,
const struct aom_codec_iface *iface)
{
@ -442,6 +617,10 @@ static av_cold int aom_init(AVCodecContext *avctx,
enccfg.g_error_resilient = ctx->error_resilient;
res = choose_tiling(avctx, &enccfg);
if (res < 0)
return res;
dump_enc_cfg(avctx, &enccfg);
/* Construct Encoder Context */
res = aom_codec_enc_init(&ctx->encoder, iface, &enccfg, flags);
@ -465,6 +644,12 @@ static av_cold int aom_init(AVCodecContext *avctx,
codecctl_int(avctx, AV1E_SET_TRANSFER_CHARACTERISTICS, avctx->color_trc);
set_color_range(avctx);
codecctl_int(avctx, AV1E_SET_SUPERBLOCK_SIZE, ctx->superblock_size);
if (ctx->uniform_tiles) {
codecctl_int(avctx, AV1E_SET_TILE_COLUMNS, ctx->tile_cols_log2);
codecctl_int(avctx, AV1E_SET_TILE_ROWS, ctx->tile_rows_log2);
}
// provide dummy value to initialize wrapper, values will be updated each _encode()
aom_img_wrap(&ctx->rawimg, img_fmt, avctx->width, avctx->height, 1,
(unsigned char*)1);
@ -796,6 +981,9 @@ static const AVOption options[] = {
{ "static-thresh", "A change threshold on blocks below which they will be skipped by the encoder", OFFSET(static_thresh), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
{ "drop-threshold", "Frame drop threshold", offsetof(AOMContext, drop_threshold), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, VE },
{ "noise-sensitivity", "Noise sensitivity", OFFSET(noise_sensitivity), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 4, VE},
{ "tiles", "Tile columns x rows", OFFSET(tile_cols), AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, 0, VE },
{ "tile-columns", "Log2 of number of tile columns to use", OFFSET(tile_cols_log2), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 6, VE},
{ "tile-rows", "Log2 of number of tile rows to use", OFFSET(tile_rows_log2), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 6, VE},
{ NULL }
};