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FFmpeg/libavcodec/mpegutils.c

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/*
* Mpeg video formats-related defines and utility functions
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include "libavutil/common.h"
#include "libavutil/frame.h"
#include "libavutil/pixdesc.h"
#include "libavutil/motion_vector.h"
#include "libavutil/avassert.h"
#include "avcodec.h"
#include "mpegutils.h"
static int add_mb(AVMotionVector *mb, uint32_t mb_type,
int dst_x, int dst_y,
int motion_x, int motion_y, int motion_scale,
int direction)
{
mb->w = IS_8X8(mb_type) || IS_8X16(mb_type) ? 8 : 16;
mb->h = IS_8X8(mb_type) || IS_16X8(mb_type) ? 8 : 16;
mb->motion_x = motion_x;
mb->motion_y = motion_y;
mb->motion_scale = motion_scale;
mb->dst_x = dst_x;
mb->dst_y = dst_y;
mb->src_x = dst_x + motion_x / motion_scale;
mb->src_y = dst_y + motion_y / motion_scale;
mb->source = direction ? 1 : -1;
mb->flags = 0; // XXX: does mb_type contain extra information that could be exported here?
return 1;
}
void ff_draw_horiz_band(AVCodecContext *avctx,
AVFrame *cur, AVFrame *last,
int y, int h, int picture_structure,
int first_field, int low_delay)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
int vshift = desc->log2_chroma_h;
const int field_pic = picture_structure != PICT_FRAME;
if (field_pic) {
h <<= 1;
y <<= 1;
}
h = FFMIN(h, avctx->height - y);
if (field_pic && first_field &&
!(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
return;
if (avctx->draw_horiz_band) {
AVFrame *src;
int offset[AV_NUM_DATA_POINTERS];
int i;
if (cur->pict_type == AV_PICTURE_TYPE_B || low_delay ||
(avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
src = cur;
else if (last)
src = last;
else
return;
if (cur->pict_type == AV_PICTURE_TYPE_B &&
picture_structure == PICT_FRAME &&
avctx->codec_id != AV_CODEC_ID_SVQ3) {
for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
offset[i] = 0;
} else {
offset[0]= y * src->linesize[0];
offset[1]=
offset[2]= (y >> vshift) * src->linesize[1];
for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
offset[i] = 0;
}
emms_c();
avctx->draw_horiz_band(avctx, src, offset,
y, picture_structure, h);
}
}
void ff_print_debug_info2(AVCodecContext *avctx, AVFrame *pict, uint8_t *mbskip_table,
uint32_t *mbtype_table, int8_t *qscale_table, int16_t (*motion_val[2])[2],
int *low_delay,
int mb_width, int mb_height, int mb_stride, int quarter_sample)
{
if ((avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) && mbtype_table && motion_val[0]) {
const int shift = 1 + quarter_sample;
const int scale = 1 << shift;
const int mv_sample_log2 = avctx->codec_id == AV_CODEC_ID_H264 || avctx->codec_id == AV_CODEC_ID_SVQ3 ? 2 : 1;
const int mv_stride = (mb_width << mv_sample_log2) +
(avctx->codec->id == AV_CODEC_ID_H264 ? 0 : 1);
int mb_x, mb_y, mbcount = 0;
/* size is width * height * 2 * 4 where 2 is for directions and 4 is
* for the maximum number of MB (4 MB in case of IS_8x8) */
AVMotionVector *mvs = av_malloc_array(mb_width * mb_height, 2 * 4 * sizeof(AVMotionVector));
if (!mvs)
return;
for (mb_y = 0; mb_y < mb_height; mb_y++) {
for (mb_x = 0; mb_x < mb_width; mb_x++) {
int i, direction, mb_type = mbtype_table[mb_x + mb_y * mb_stride];
for (direction = 0; direction < 2; direction++) {
if (!USES_LIST(mb_type, direction))
continue;
if (IS_8X8(mb_type)) {
for (i = 0; i < 4; i++) {
int sx = mb_x * 16 + 4 + 8 * (i & 1);
int sy = mb_y * 16 + 4 + 8 * (i >> 1);
int xy = (mb_x * 2 + (i & 1) +
(mb_y * 2 + (i >> 1)) * mv_stride) << (mv_sample_log2 - 1);
int mx = motion_val[direction][xy][0];
int my = motion_val[direction][xy][1];
mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
}
} else if (IS_16X8(mb_type)) {
for (i = 0; i < 2; i++) {
int sx = mb_x * 16 + 8;
int sy = mb_y * 16 + 4 + 8 * i;
int xy = (mb_x * 2 + (mb_y * 2 + i) * mv_stride) << (mv_sample_log2 - 1);
int mx = motion_val[direction][xy][0];
int my = motion_val[direction][xy][1];
if (IS_INTERLACED(mb_type))
my *= 2;
mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
}
} else if (IS_8X16(mb_type)) {
for (i = 0; i < 2; i++) {
int sx = mb_x * 16 + 4 + 8 * i;
int sy = mb_y * 16 + 8;
int xy = (mb_x * 2 + i + mb_y * 2 * mv_stride) << (mv_sample_log2 - 1);
int mx = motion_val[direction][xy][0];
int my = motion_val[direction][xy][1];
if (IS_INTERLACED(mb_type))
my *= 2;
mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
}
} else {
int sx = mb_x * 16 + 8;
int sy = mb_y * 16 + 8;
int xy = (mb_x + mb_y * mv_stride) << mv_sample_log2;
int mx = motion_val[direction][xy][0];
int my = motion_val[direction][xy][1];
mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
}
}
}
}
if (mbcount) {
AVFrameSideData *sd;
av_log(avctx, AV_LOG_DEBUG, "Adding %d MVs info to frame %d\n", mbcount, avctx->frame_number);
sd = av_frame_new_side_data(pict, AV_FRAME_DATA_MOTION_VECTORS, mbcount * sizeof(AVMotionVector));
if (!sd) {
av_freep(&mvs);
return;
}
memcpy(sd->data, mvs, mbcount * sizeof(AVMotionVector));
}
av_freep(&mvs);
}
/* TODO: export all the following to make them accessible for users (and filters) */
if (avctx->hwaccel || !mbtype_table)
return;
if (avctx->debug & (FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE)) {
int x,y;
av_log(avctx, AV_LOG_DEBUG, "New frame, type: %c\n",
av_get_picture_type_char(pict->pict_type));
for (y = 0; y < mb_height; y++) {
for (x = 0; x < mb_width; x++) {
if (avctx->debug & FF_DEBUG_SKIP) {
int count = mbskip_table ? mbskip_table[x + y * mb_stride] : 0;
if (count > 9)
count = 9;
av_log(avctx, AV_LOG_DEBUG, "%1d", count);
}
if (avctx->debug & FF_DEBUG_QP) {
av_log(avctx, AV_LOG_DEBUG, "%2d",
qscale_table[x + y * mb_stride]);
}
if (avctx->debug & FF_DEBUG_MB_TYPE) {
int mb_type = mbtype_table[x + y * mb_stride];
// Type & MV direction
if (IS_PCM(mb_type))
av_log(avctx, AV_LOG_DEBUG, "P");
else if (IS_INTRA(mb_type) && IS_ACPRED(mb_type))
av_log(avctx, AV_LOG_DEBUG, "A");
else if (IS_INTRA4x4(mb_type))
av_log(avctx, AV_LOG_DEBUG, "i");
else if (IS_INTRA16x16(mb_type))
av_log(avctx, AV_LOG_DEBUG, "I");
else if (IS_DIRECT(mb_type) && IS_SKIP(mb_type))
av_log(avctx, AV_LOG_DEBUG, "d");
else if (IS_DIRECT(mb_type))
av_log(avctx, AV_LOG_DEBUG, "D");
else if (IS_GMC(mb_type) && IS_SKIP(mb_type))
av_log(avctx, AV_LOG_DEBUG, "g");
else if (IS_GMC(mb_type))
av_log(avctx, AV_LOG_DEBUG, "G");
else if (IS_SKIP(mb_type))
av_log(avctx, AV_LOG_DEBUG, "S");
else if (!USES_LIST(mb_type, 1))
av_log(avctx, AV_LOG_DEBUG, ">");
else if (!USES_LIST(mb_type, 0))
av_log(avctx, AV_LOG_DEBUG, "<");
else {
av_assert2(USES_LIST(mb_type, 0) && USES_LIST(mb_type, 1));
av_log(avctx, AV_LOG_DEBUG, "X");
}
// segmentation
if (IS_8X8(mb_type))
av_log(avctx, AV_LOG_DEBUG, "+");
else if (IS_16X8(mb_type))
av_log(avctx, AV_LOG_DEBUG, "-");
else if (IS_8X16(mb_type))
av_log(avctx, AV_LOG_DEBUG, "|");
else if (IS_INTRA(mb_type) || IS_16X16(mb_type))
av_log(avctx, AV_LOG_DEBUG, " ");
else
av_log(avctx, AV_LOG_DEBUG, "?");
if (IS_INTERLACED(mb_type))
av_log(avctx, AV_LOG_DEBUG, "=");
else
av_log(avctx, AV_LOG_DEBUG, " ");
}
}
av_log(avctx, AV_LOG_DEBUG, "\n");
}
}
#if FF_API_DEBUG_MV
if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) ||
(avctx->debug_mv)) {
int mb_y;
int i, ret;
int h_chroma_shift, v_chroma_shift, block_height;
const int mv_sample_log2 = avctx->codec_id == AV_CODEC_ID_H264 || avctx->codec_id == AV_CODEC_ID_SVQ3 ? 2 : 1;
const int mv_stride = (mb_width << mv_sample_log2) +
(avctx->codec->id == AV_CODEC_ID_H264 ? 0 : 1);
if (low_delay)
*low_delay = 0; // needed to see the vectors without trashing the buffers
ret = av_pix_fmt_get_chroma_sub_sample (avctx->pix_fmt, &h_chroma_shift, &v_chroma_shift);
if (ret)
return ret;
av_frame_make_writable(pict);
pict->opaque = NULL;
block_height = 16 >> v_chroma_shift;
for (mb_y = 0; mb_y < mb_height; mb_y++) {
int mb_x;
for (mb_x = 0; mb_x < mb_width; mb_x++) {
const int mb_index = mb_x + mb_y * mb_stride;
if ((avctx->debug & FF_DEBUG_VIS_QP)) {
uint64_t c = (qscale_table[mb_index] * 128 / 31) *
0x0101010101010101ULL;
int y;
for (y = 0; y < block_height; y++) {
*(uint64_t *)(pict->data[1] + 8 * mb_x +
(block_height * mb_y + y) *
pict->linesize[1]) = c;
*(uint64_t *)(pict->data[2] + 8 * mb_x +
(block_height * mb_y + y) *
pict->linesize[2]) = c;
}
}
if ((avctx->debug & FF_DEBUG_VIS_MB_TYPE) &&
motion_val[0]) {
int mb_type = mbtype_table[mb_index];
uint64_t u,v;
int y;
#define COLOR(theta, r) \
u = (int)(128 + r * cos(theta * M_PI / 180)); \
v = (int)(128 + r * sin(theta * M_PI / 180));
u = v = 128;
if (IS_PCM(mb_type)) {
COLOR(120, 48)
} else if ((IS_INTRA(mb_type) && IS_ACPRED(mb_type)) ||
IS_INTRA16x16(mb_type)) {
COLOR(30, 48)
} else if (IS_INTRA4x4(mb_type)) {
COLOR(90, 48)
} else if (IS_DIRECT(mb_type) && IS_SKIP(mb_type)) {
// COLOR(120, 48)
} else if (IS_DIRECT(mb_type)) {
COLOR(150, 48)
} else if (IS_GMC(mb_type) && IS_SKIP(mb_type)) {
COLOR(170, 48)
} else if (IS_GMC(mb_type)) {
COLOR(190, 48)
} else if (IS_SKIP(mb_type)) {
// COLOR(180, 48)
} else if (!USES_LIST(mb_type, 1)) {
COLOR(240, 48)
} else if (!USES_LIST(mb_type, 0)) {
COLOR(0, 48)
} else {
av_assert2(USES_LIST(mb_type, 0) && USES_LIST(mb_type, 1));
COLOR(300,48)
}
u *= 0x0101010101010101ULL;
v *= 0x0101010101010101ULL;
for (y = 0; y < block_height; y++) {
*(uint64_t *)(pict->data[1] + 8 * mb_x +
(block_height * mb_y + y) * pict->linesize[1]) = u;
*(uint64_t *)(pict->data[2] + 8 * mb_x +
(block_height * mb_y + y) * pict->linesize[2]) = v;
}
// segmentation
if (IS_8X8(mb_type) || IS_16X8(mb_type)) {
*(uint64_t *)(pict->data[0] + 16 * mb_x + 0 +
(16 * mb_y + 8) * pict->linesize[0]) ^= 0x8080808080808080ULL;
*(uint64_t *)(pict->data[0] + 16 * mb_x + 8 +
(16 * mb_y + 8) * pict->linesize[0]) ^= 0x8080808080808080ULL;
}
if (IS_8X8(mb_type) || IS_8X16(mb_type)) {
for (y = 0; y < 16; y++)
pict->data[0][16 * mb_x + 8 + (16 * mb_y + y) *
pict->linesize[0]] ^= 0x80;
}
if (IS_8X8(mb_type) && mv_sample_log2 >= 2) {
int dm = 1 << (mv_sample_log2 - 2);
for (i = 0; i < 4; i++) {
int sx = mb_x * 16 + 8 * (i & 1);
int sy = mb_y * 16 + 8 * (i >> 1);
int xy = (mb_x * 2 + (i & 1) +
(mb_y * 2 + (i >> 1)) * mv_stride) << (mv_sample_log2 - 1);
// FIXME bidir
int32_t *mv = (int32_t *) &motion_val[0][xy];
if (mv[0] != mv[dm] ||
mv[dm * mv_stride] != mv[dm * (mv_stride + 1)])
for (y = 0; y < 8; y++)
pict->data[0][sx + 4 + (sy + y) * pict->linesize[0]] ^= 0x80;
if (mv[0] != mv[dm * mv_stride] || mv[dm] != mv[dm * (mv_stride + 1)])
*(uint64_t *)(pict->data[0] + sx + (sy + 4) *
pict->linesize[0]) ^= 0x8080808080808080ULL;
}
}
if (IS_INTERLACED(mb_type) &&
avctx->codec->id == AV_CODEC_ID_H264) {
// hmm
}
}
if (mbskip_table)
mbskip_table[mb_index] = 0;
}
}
}
#endif
}