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ffmpeg/libavcodec/mpegvideo.c

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/*
* The simplest mpeg encoder (well, it was the simplest!)
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* 4MV & hq & B-frame encoding stuff by Michael Niedermayer <michaelni@gmx.at>
*
* 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
*/
/**
* @file
* The simplest mpeg encoder (well, it was the simplest!).
*/
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "avcodec.h"
#include "blockdsp.h"
#include "h264chroma.h"
#include "idctdsp.h"
#include "mathops.h"
#include "mpeg_er.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideodata.h"
static void dct_unquantize_mpeg1_intra_c(MpegEncContext *s,
int16_t *block, int n, int qscale)
{
int i, level, nCoeffs;
const uint16_t *quant_matrix;
nCoeffs= s->block_last_index[n];
block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
/* XXX: only MPEG-1 */
quant_matrix = s->intra_matrix;
for(i=1;i<=nCoeffs;i++) {
int j= s->intra_scantable.permutated[i];
level = block[j];
if (level) {
if (level < 0) {
level = -level;
level = (int)(level * qscale * quant_matrix[j]) >> 3;
level = (level - 1) | 1;
level = -level;
} else {
level = (int)(level * qscale * quant_matrix[j]) >> 3;
level = (level - 1) | 1;
}
block[j] = level;
}
}
}
static void dct_unquantize_mpeg1_inter_c(MpegEncContext *s,
int16_t *block, int n, int qscale)
{
int i, level, nCoeffs;
const uint16_t *quant_matrix;
nCoeffs= s->block_last_index[n];
quant_matrix = s->inter_matrix;
for(i=0; i<=nCoeffs; i++) {
int j= s->intra_scantable.permutated[i];
level = block[j];
if (level) {
if (level < 0) {
level = -level;
level = (((level << 1) + 1) * qscale *
((int) (quant_matrix[j]))) >> 4;
level = (level - 1) | 1;
level = -level;
} else {
level = (((level << 1) + 1) * qscale *
((int) (quant_matrix[j]))) >> 4;
level = (level - 1) | 1;
}
block[j] = level;
}
}
}
static void dct_unquantize_mpeg2_intra_c(MpegEncContext *s,
int16_t *block, int n, int qscale)
{
int i, level, nCoeffs;
const uint16_t *quant_matrix;
if (s->q_scale_type) qscale = ff_mpeg2_non_linear_qscale[qscale];
else qscale <<= 1;
if(s->alternate_scan) nCoeffs= 63;
else nCoeffs= s->block_last_index[n];
block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
quant_matrix = s->intra_matrix;
for(i=1;i<=nCoeffs;i++) {
int j= s->intra_scantable.permutated[i];
level = block[j];
if (level) {
if (level < 0) {
level = -level;
level = (int)(level * qscale * quant_matrix[j]) >> 4;
level = -level;
} else {
level = (int)(level * qscale * quant_matrix[j]) >> 4;
}
block[j] = level;
}
}
}
static void dct_unquantize_mpeg2_intra_bitexact(MpegEncContext *s,
int16_t *block, int n, int qscale)
{
int i, level, nCoeffs;
const uint16_t *quant_matrix;
int sum=-1;
if (s->q_scale_type) qscale = ff_mpeg2_non_linear_qscale[qscale];
else qscale <<= 1;
if(s->alternate_scan) nCoeffs= 63;
else nCoeffs= s->block_last_index[n];
block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
sum += block[0];
quant_matrix = s->intra_matrix;
for(i=1;i<=nCoeffs;i++) {
int j= s->intra_scantable.permutated[i];
level = block[j];
if (level) {
if (level < 0) {
level = -level;
level = (int)(level * qscale * quant_matrix[j]) >> 4;
level = -level;
} else {
level = (int)(level * qscale * quant_matrix[j]) >> 4;
}
block[j] = level;
sum+=level;
}
}
block[63]^=sum&1;
}
static void dct_unquantize_mpeg2_inter_c(MpegEncContext *s,
int16_t *block, int n, int qscale)
{
int i, level, nCoeffs;
const uint16_t *quant_matrix;
int sum=-1;
if (s->q_scale_type) qscale = ff_mpeg2_non_linear_qscale[qscale];
else qscale <<= 1;
if(s->alternate_scan) nCoeffs= 63;
else nCoeffs= s->block_last_index[n];
quant_matrix = s->inter_matrix;
for(i=0; i<=nCoeffs; i++) {
int j= s->intra_scantable.permutated[i];
level = block[j];
if (level) {
if (level < 0) {
level = -level;
level = (((level << 1) + 1) * qscale *
((int) (quant_matrix[j]))) >> 5;
level = -level;
} else {
level = (((level << 1) + 1) * qscale *
((int) (quant_matrix[j]))) >> 5;
}
block[j] = level;
sum+=level;
}
}
block[63]^=sum&1;
}
static void dct_unquantize_h263_intra_c(MpegEncContext *s,
int16_t *block, int n, int qscale)
{
int i, level, qmul, qadd;
int nCoeffs;
av_assert2(s->block_last_index[n]>=0 || s->h263_aic);
qmul = qscale << 1;
if (!s->h263_aic) {
block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
qadd = (qscale - 1) | 1;
}else{
qadd = 0;
}
if(s->ac_pred)
nCoeffs=63;
else
nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
for(i=1; i<=nCoeffs; i++) {
level = block[i];
if (level) {
if (level < 0) {
level = level * qmul - qadd;
} else {
level = level * qmul + qadd;
}
block[i] = level;
}
}
}
static void dct_unquantize_h263_inter_c(MpegEncContext *s,
int16_t *block, int n, int qscale)
{
int i, level, qmul, qadd;
int nCoeffs;
av_assert2(s->block_last_index[n]>=0);
qadd = (qscale - 1) | 1;
qmul = qscale << 1;
nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
for(i=0; i<=nCoeffs; i++) {
level = block[i];
if (level) {
if (level < 0) {
level = level * qmul - qadd;
} else {
level = level * qmul + qadd;
}
block[i] = level;
}
}
}
static void gray16(uint8_t *dst, const uint8_t *src, ptrdiff_t linesize, int h)
{
while(h--)
memset(dst + h*linesize, 128, 16);
}
static void gray8(uint8_t *dst, const uint8_t *src, ptrdiff_t linesize, int h)
{
while(h--)
memset(dst + h*linesize, 128, 8);
}
/* init common dct for both encoder and decoder */
static av_cold int dct_init(MpegEncContext *s)
{
ff_blockdsp_init(&s->bdsp);
ff_h264chroma_init(&s->h264chroma, 8); //for lowres
ff_hpeldsp_init(&s->hdsp, s->avctx->flags);
ff_videodsp_init(&s->vdsp, s->avctx->bits_per_raw_sample);
if (s->avctx->debug & FF_DEBUG_NOMC) {
int i;
for (i=0; i<4; i++) {
s->hdsp.avg_pixels_tab[0][i] = gray16;
s->hdsp.put_pixels_tab[0][i] = gray16;
s->hdsp.put_no_rnd_pixels_tab[0][i] = gray16;
s->hdsp.avg_pixels_tab[1][i] = gray8;
s->hdsp.put_pixels_tab[1][i] = gray8;
s->hdsp.put_no_rnd_pixels_tab[1][i] = gray8;
}
}
s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_c;
s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_c;
s->dct_unquantize_mpeg1_intra = dct_unquantize_mpeg1_intra_c;
s->dct_unquantize_mpeg1_inter = dct_unquantize_mpeg1_inter_c;
s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_c;
if (s->avctx->flags & AV_CODEC_FLAG_BITEXACT)
s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_bitexact;
s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_c;
#if HAVE_INTRINSICS_NEON
ff_mpv_common_init_neon(s);
#endif
#if ARCH_ALPHA
ff_mpv_common_init_axp(s);
#elif ARCH_ARM
ff_mpv_common_init_arm(s);
#elif ARCH_PPC
ff_mpv_common_init_ppc(s);
#elif ARCH_X86
ff_mpv_common_init_x86(s);
#elif ARCH_MIPS
ff_mpv_common_init_mips(s);
#endif
return 0;
}
av_cold void ff_mpv_idct_init(MpegEncContext *s)
{
if (s->codec_id == AV_CODEC_ID_MPEG4)
s->idsp.mpeg4_studio_profile = s->studio_profile;
ff_idctdsp_init(&s->idsp, s->avctx);
/* load & permutate scantables
* note: only wmv uses different ones
*/
if (s->alternate_scan) {
ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
} else {
ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
}
ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
}
static int init_duplicate_context(MpegEncContext *s)
{
int y_size = s->b8_stride * (2 * s->mb_height + 1);
int c_size = s->mb_stride * (s->mb_height + 1);
int yc_size = y_size + 2 * c_size;
int i;
if (s->mb_height & 1)
yc_size += 2*s->b8_stride + 2*s->mb_stride;
if (s->encoding) {
if (!FF_ALLOCZ_TYPED_ARRAY(s->me.map, ME_MAP_SIZE) ||
!FF_ALLOCZ_TYPED_ARRAY(s->me.score_map, ME_MAP_SIZE))
return AVERROR(ENOMEM);
if (s->noise_reduction) {
if (!FF_ALLOCZ_TYPED_ARRAY(s->dct_error_sum, 2))
return AVERROR(ENOMEM);
}
}
if (!FF_ALLOCZ_TYPED_ARRAY(s->blocks, 2))
return AVERROR(ENOMEM);
s->block = s->blocks[0];
for (i = 0; i < 12; i++) {
s->pblocks[i] = &s->block[i];
}
if (s->avctx->codec_tag == AV_RL32("VCR2")) {
// exchange uv
FFSWAP(void *, s->pblocks[4], s->pblocks[5]);
}
if (s->out_format == FMT_H263) {
/* ac values */
if (!FF_ALLOCZ_TYPED_ARRAY(s->ac_val_base, yc_size))
return AVERROR(ENOMEM);
s->ac_val[0] = s->ac_val_base + s->b8_stride + 1;
s->ac_val[1] = s->ac_val_base + y_size + s->mb_stride + 1;
s->ac_val[2] = s->ac_val[1] + c_size;
}
return 0;
}
int ff_mpv_init_duplicate_contexts(MpegEncContext *s)
{
int nb_slices = s->slice_context_count, ret;
/* We initialize the copies before the original so that
* fields allocated in init_duplicate_context are NULL after
* copying. This prevents double-frees upon allocation error. */
for (int i = 1; i < nb_slices; i++) {
s->thread_context[i] = av_memdup(s, sizeof(MpegEncContext));
if (!s->thread_context[i])
return AVERROR(ENOMEM);
if ((ret = init_duplicate_context(s->thread_context[i])) < 0)
return ret;
s->thread_context[i]->start_mb_y =
(s->mb_height * (i ) + nb_slices / 2) / nb_slices;
s->thread_context[i]->end_mb_y =
(s->mb_height * (i + 1) + nb_slices / 2) / nb_slices;
}
s->start_mb_y = 0;
s->end_mb_y = nb_slices > 1 ? (s->mb_height + nb_slices / 2) / nb_slices
: s->mb_height;
return init_duplicate_context(s);
}
static void free_duplicate_context(MpegEncContext *s)
{
if (!s)
return;
av_freep(&s->sc.edge_emu_buffer);
av_freep(&s->me.scratchpad);
s->me.temp =
s->sc.rd_scratchpad =
s->sc.b_scratchpad =
s->sc.obmc_scratchpad = NULL;
av_freep(&s->dct_error_sum);
av_freep(&s->me.map);
av_freep(&s->me.score_map);
av_freep(&s->blocks);
av_freep(&s->ac_val_base);
s->block = NULL;
}
static void free_duplicate_contexts(MpegEncContext *s)
{
for (int i = 1; i < s->slice_context_count; i++) {
free_duplicate_context(s->thread_context[i]);
av_freep(&s->thread_context[i]);
}
free_duplicate_context(s);
}
static void backup_duplicate_context(MpegEncContext *bak, MpegEncContext *src)
{
#define COPY(a) bak->a = src->a
COPY(sc.edge_emu_buffer);
COPY(me.scratchpad);
COPY(me.temp);
COPY(sc.rd_scratchpad);
COPY(sc.b_scratchpad);
COPY(sc.obmc_scratchpad);
COPY(me.map);
COPY(me.score_map);
COPY(blocks);
COPY(block);
COPY(start_mb_y);
COPY(end_mb_y);
COPY(me.map_generation);
COPY(pb);
COPY(dct_error_sum);
COPY(dct_count[0]);
COPY(dct_count[1]);
COPY(ac_val_base);
COPY(ac_val[0]);
COPY(ac_val[1]);
COPY(ac_val[2]);
#undef COPY
}
int ff_update_duplicate_context(MpegEncContext *dst, const MpegEncContext *src)
{
MpegEncContext bak;
int i, ret;
// FIXME copy only needed parts
backup_duplicate_context(&bak, dst);
memcpy(dst, src, sizeof(MpegEncContext));
backup_duplicate_context(dst, &bak);
for (i = 0; i < 12; i++) {
dst->pblocks[i] = &dst->block[i];
}
if (dst->avctx->codec_tag == AV_RL32("VCR2")) {
// exchange uv
FFSWAP(void *, dst->pblocks[4], dst->pblocks[5]);
}
if (!dst->sc.edge_emu_buffer &&
(ret = ff_mpeg_framesize_alloc(dst->avctx, &dst->me,
&dst->sc, dst->linesize)) < 0) {
av_log(dst->avctx, AV_LOG_ERROR, "failed to allocate context "
"scratch buffers.\n");
return ret;
}
return 0;
}
/**
* Set the given MpegEncContext to common defaults
* (same for encoding and decoding).
* The changed fields will not depend upon the
* prior state of the MpegEncContext.
*/
void ff_mpv_common_defaults(MpegEncContext *s)
{
s->y_dc_scale_table =
s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
s->chroma_qscale_table = ff_default_chroma_qscale_table;
s->progressive_frame = 1;
s->progressive_sequence = 1;
s->picture_structure = PICT_FRAME;
s->coded_picture_number = 0;
s->picture_number = 0;
s->f_code = 1;
s->b_code = 1;
s->slice_context_count = 1;
}
int ff_mpv_init_context_frame(MpegEncContext *s)
{
int y_size, c_size, yc_size, i, mb_array_size, mv_table_size, x, y;
if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && !s->progressive_sequence)
s->mb_height = (s->height + 31) / 32 * 2;
else
s->mb_height = (s->height + 15) / 16;
s->mb_width = (s->width + 15) / 16;
s->mb_stride = s->mb_width + 1;
s->b8_stride = s->mb_width * 2 + 1;
mb_array_size = s->mb_height * s->mb_stride;
mv_table_size = (s->mb_height + 2) * s->mb_stride + 1;
/* set default edge pos, will be overridden
* in decode_header if needed */
s->h_edge_pos = s->mb_width * 16;
s->v_edge_pos = s->mb_height * 16;
s->mb_num = s->mb_width * s->mb_height;
s->block_wrap[0] =
s->block_wrap[1] =
s->block_wrap[2] =
s->block_wrap[3] = s->b8_stride;
s->block_wrap[4] =
s->block_wrap[5] = s->mb_stride;
y_size = s->b8_stride * (2 * s->mb_height + 1);
c_size = s->mb_stride * (s->mb_height + 1);
yc_size = y_size + 2 * c_size;
if (s->mb_height & 1)
yc_size += 2*s->b8_stride + 2*s->mb_stride;
if (!FF_ALLOCZ_TYPED_ARRAY(s->mb_index2xy, s->mb_num + 1))
return AVERROR(ENOMEM);
for (y = 0; y < s->mb_height; y++)
for (x = 0; x < s->mb_width; x++)
s->mb_index2xy[x + y * s->mb_width] = x + y * s->mb_stride;
s->mb_index2xy[s->mb_height * s->mb_width] = (s->mb_height - 1) * s->mb_stride + s->mb_width; // FIXME really needed?
if (s->codec_id == AV_CODEC_ID_MPEG4 ||
(s->avctx->flags & AV_CODEC_FLAG_INTERLACED_ME)) {
/* interlaced direct mode decoding tables */
int16_t (*tmp)[2] = av_calloc(mv_table_size, 4 * sizeof(*tmp));
if (!tmp)
return AVERROR(ENOMEM);
s->p_field_mv_table_base = tmp;
tmp += s->mb_stride + 1;
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 2; j++) {
s->p_field_mv_table[i][j] = tmp;
tmp += mv_table_size;
}
}
}
if (s->out_format == FMT_H263) {
/* cbp values, cbp, ac_pred, pred_dir */
if (!(s->coded_block_base = av_mallocz(y_size + (s->mb_height&1)*2*s->b8_stride)) ||
!(s->cbp_table = av_mallocz(mb_array_size)) ||
!(s->pred_dir_table = av_mallocz(mb_array_size)))
return AVERROR(ENOMEM);
s->coded_block = s->coded_block_base + s->b8_stride + 1;
}
if (s->h263_pred || s->h263_plus || !s->encoding) {
/* dc values */
// MN: we need these for error resilience of intra-frames
if (!FF_ALLOCZ_TYPED_ARRAY(s->dc_val_base, yc_size))
return AVERROR(ENOMEM);
s->dc_val[0] = s->dc_val_base + s->b8_stride + 1;
s->dc_val[1] = s->dc_val_base + y_size + s->mb_stride + 1;
s->dc_val[2] = s->dc_val[1] + c_size;
for (i = 0; i < yc_size; i++)
s->dc_val_base[i] = 1024;
}
// Note the + 1 is for a quicker MPEG-4 slice_end detection
if (!(s->mbskip_table = av_mallocz(mb_array_size + 2)) ||
/* which mb is an intra block, init macroblock skip table */
!(s->mbintra_table = av_malloc(mb_array_size)))
return AVERROR(ENOMEM);
memset(s->mbintra_table, 1, mb_array_size);
return !CONFIG_MPEGVIDEODEC || s->encoding ? 0 : ff_mpeg_er_init(s);
}
static void clear_context(MpegEncContext *s)
{
memset(&s->next_picture, 0, sizeof(s->next_picture));
memset(&s->last_picture, 0, sizeof(s->last_picture));
memset(&s->current_picture, 0, sizeof(s->current_picture));
memset(&s->new_picture, 0, sizeof(s->new_picture));
memset(s->thread_context, 0, sizeof(s->thread_context));
s->me.map = NULL;
s->me.score_map = NULL;
s->dct_error_sum = NULL;
s->block = NULL;
s->blocks = NULL;
memset(s->pblocks, 0, sizeof(s->pblocks));
s->ac_val_base = NULL;
s->ac_val[0] =
s->ac_val[1] =
s->ac_val[2] =NULL;
s->sc.edge_emu_buffer = NULL;
s->me.scratchpad = NULL;
s->me.temp =
s->sc.rd_scratchpad =
s->sc.b_scratchpad =
s->sc.obmc_scratchpad = NULL;
s->bitstream_buffer = NULL;
s->allocated_bitstream_buffer_size = 0;
s->picture = NULL;
s->p_field_mv_table_base = NULL;
for (int i = 0; i < 2; i++)
for (int j = 0; j < 2; j++)
s->p_field_mv_table[i][j] = NULL;
s->dc_val_base = NULL;
s->coded_block_base = NULL;
s->mbintra_table = NULL;
s->cbp_table = NULL;
s->pred_dir_table = NULL;
s->mbskip_table = NULL;
s->er.error_status_table = NULL;
s->er.er_temp_buffer = NULL;
s->mb_index2xy = NULL;
}
/**
* init common structure for both encoder and decoder.
* this assumes that some variables like width/height are already set
*/
av_cold int ff_mpv_common_init(MpegEncContext *s)
{
int i, ret;
int nb_slices = (HAVE_THREADS &&
s->avctx->active_thread_type & FF_THREAD_SLICE) ?
s->avctx->thread_count : 1;
clear_context(s);
if (s->encoding && s->avctx->slices)
nb_slices = s->avctx->slices;
if (s->avctx->pix_fmt == AV_PIX_FMT_NONE) {
av_log(s->avctx, AV_LOG_ERROR,
"decoding to AV_PIX_FMT_NONE is not supported.\n");
return AVERROR(EINVAL);
}
if ((s->width || s->height) &&
av_image_check_size(s->width, s->height, 0, s->avctx))
return AVERROR(EINVAL);
dct_init(s);
/* set chroma shifts */
ret = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
&s->chroma_x_shift,
&s->chroma_y_shift);
if (ret)
return ret;
if (!FF_ALLOCZ_TYPED_ARRAY(s->picture, MAX_PICTURE_COUNT))
return AVERROR(ENOMEM);
for (i = 0; i < MAX_PICTURE_COUNT; i++) {
s->picture[i].f = av_frame_alloc();
if (!s->picture[i].f)
goto fail_nomem;
}
if (!(s->next_picture.f = av_frame_alloc()) ||
!(s->last_picture.f = av_frame_alloc()) ||
!(s->current_picture.f = av_frame_alloc()) ||
!(s->new_picture = av_frame_alloc()))
goto fail_nomem;
if ((ret = ff_mpv_init_context_frame(s)))
goto fail;
if (nb_slices > MAX_THREADS || (nb_slices > s->mb_height && s->mb_height)) {
int max_slices;
if (s->mb_height)
max_slices = FFMIN(MAX_THREADS, s->mb_height);
else
max_slices = MAX_THREADS;
av_log(s->avctx, AV_LOG_WARNING, "too many threads/slices (%d),"
" reducing to %d\n", nb_slices, max_slices);
nb_slices = max_slices;
}
#if FF_API_FLAG_TRUNCATED
s->parse_context.state = -1;
#endif
s->context_initialized = 1;
memset(s->thread_context, 0, sizeof(s->thread_context));
s->thread_context[0] = s;
s->slice_context_count = nb_slices;
// if (s->width && s->height) {
ret = ff_mpv_init_duplicate_contexts(s);
if (ret < 0)
goto fail;
// }
return 0;
fail_nomem:
ret = AVERROR(ENOMEM);
fail:
ff_mpv_common_end(s);
return ret;
}
void ff_mpv_free_context_frame(MpegEncContext *s)
{
free_duplicate_contexts(s);
av_freep(&s->p_field_mv_table_base);
for (int i = 0; i < 2; i++)
for (int j = 0; j < 2; j++)
s->p_field_mv_table[i][j] = NULL;
av_freep(&s->dc_val_base);
av_freep(&s->coded_block_base);
av_freep(&s->mbintra_table);
av_freep(&s->cbp_table);
av_freep(&s->pred_dir_table);
av_freep(&s->mbskip_table);
av_freep(&s->er.error_status_table);
av_freep(&s->er.er_temp_buffer);
av_freep(&s->mb_index2xy);
s->linesize = s->uvlinesize = 0;
}
/* init common structure for both encoder and decoder */
void ff_mpv_common_end(MpegEncContext *s)
{
if (!s)
return;
ff_mpv_free_context_frame(s);
if (s->slice_context_count > 1)
s->slice_context_count = 1;
#if FF_API_FLAG_TRUNCATED
av_freep(&s->parse_context.buffer);
s->parse_context.buffer_size = 0;
#endif
av_freep(&s->bitstream_buffer);
s->allocated_bitstream_buffer_size = 0;
if (!s->avctx)
return;
if (s->picture) {
for (int i = 0; i < MAX_PICTURE_COUNT; i++)
ff_mpv_picture_free(s->avctx, &s->picture[i]);
}
av_freep(&s->picture);
ff_mpv_picture_free(s->avctx, &s->last_picture);
ff_mpv_picture_free(s->avctx, &s->current_picture);
ff_mpv_picture_free(s->avctx, &s->next_picture);
av_frame_free(&s->new_picture);
s->context_initialized = 0;
s->context_reinit = 0;
s->last_picture_ptr =
s->next_picture_ptr =
s->current_picture_ptr = NULL;
s->linesize = s->uvlinesize = 0;
}
/**
* Clean dc, ac, coded_block for the current non-intra MB.
*/
void ff_clean_intra_table_entries(MpegEncContext *s)
{
int wrap = s->b8_stride;
int xy = s->block_index[0];
s->dc_val[0][xy ] =
s->dc_val[0][xy + 1 ] =
s->dc_val[0][xy + wrap] =
s->dc_val[0][xy + 1 + wrap] = 1024;
/* ac pred */
memset(s->ac_val[0][xy ], 0, 32 * sizeof(int16_t));
memset(s->ac_val[0][xy + wrap], 0, 32 * sizeof(int16_t));
if (s->msmpeg4_version>=3) {
s->coded_block[xy ] =
s->coded_block[xy + 1 ] =
s->coded_block[xy + wrap] =
s->coded_block[xy + 1 + wrap] = 0;
}
/* chroma */
wrap = s->mb_stride;
xy = s->mb_x + s->mb_y * wrap;
s->dc_val[1][xy] =
s->dc_val[2][xy] = 1024;
/* ac pred */
memset(s->ac_val[1][xy], 0, 16 * sizeof(int16_t));
memset(s->ac_val[2][xy], 0, 16 * sizeof(int16_t));
s->mbintra_table[xy]= 0;
}
void ff_init_block_index(MpegEncContext *s){ //FIXME maybe rename
const int linesize = s->current_picture.f->linesize[0]; //not s->linesize as this would be wrong for field pics
const int uvlinesize = s->current_picture.f->linesize[1];
const int width_of_mb = (4 + (s->avctx->bits_per_raw_sample > 8)) - s->avctx->lowres;
const int height_of_mb = 4 - s->avctx->lowres;
s->block_index[0]= s->b8_stride*(s->mb_y*2 ) - 2 + s->mb_x*2;
s->block_index[1]= s->b8_stride*(s->mb_y*2 ) - 1 + s->mb_x*2;
s->block_index[2]= s->b8_stride*(s->mb_y*2 + 1) - 2 + s->mb_x*2;
s->block_index[3]= s->b8_stride*(s->mb_y*2 + 1) - 1 + s->mb_x*2;
s->block_index[4]= s->mb_stride*(s->mb_y + 1) + s->b8_stride*s->mb_height*2 + s->mb_x - 1;
s->block_index[5]= s->mb_stride*(s->mb_y + s->mb_height + 2) + s->b8_stride*s->mb_height*2 + s->mb_x - 1;
//block_index is not used by mpeg2, so it is not affected by chroma_format
s->dest[0] = s->current_picture.f->data[0] + (int)((s->mb_x - 1U) << width_of_mb);
s->dest[1] = s->current_picture.f->data[1] + (int)((s->mb_x - 1U) << (width_of_mb - s->chroma_x_shift));
s->dest[2] = s->current_picture.f->data[2] + (int)((s->mb_x - 1U) << (width_of_mb - s->chroma_x_shift));
if (s->picture_structure == PICT_FRAME) {
s->dest[0] += s->mb_y * linesize << height_of_mb;
s->dest[1] += s->mb_y * uvlinesize << (height_of_mb - s->chroma_y_shift);
s->dest[2] += s->mb_y * uvlinesize << (height_of_mb - s->chroma_y_shift);
} else {
s->dest[0] += (s->mb_y>>1) * linesize << height_of_mb;
s->dest[1] += (s->mb_y>>1) * uvlinesize << (height_of_mb - s->chroma_y_shift);
s->dest[2] += (s->mb_y>>1) * uvlinesize << (height_of_mb - s->chroma_y_shift);
av_assert1((s->mb_y&1) == (s->picture_structure == PICT_BOTTOM_FIELD));
}
}
/**
* set qscale and update qscale dependent variables.
*/
void ff_set_qscale(MpegEncContext * s, int qscale)
{
if (qscale < 1)
qscale = 1;
else if (qscale > 31)
qscale = 31;
s->qscale = qscale;
s->chroma_qscale= s->chroma_qscale_table[qscale];
s->y_dc_scale= s->y_dc_scale_table[ qscale ];
s->c_dc_scale= s->c_dc_scale_table[ s->chroma_qscale ];
}
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