662 lines
22 KiB
C
662 lines
22 KiB
C
/*
|
|
* Indeo Video Interactive v5 compatible decoder
|
|
* Copyright (c) 2009 Maxim Poliakovski
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Indeo Video Interactive version 5 decoder
|
|
*
|
|
* Indeo5 data is usually transported within .avi or .mov files.
|
|
* Known FOURCCs: 'IV50'
|
|
*/
|
|
|
|
#define BITSTREAM_READER_LE
|
|
#include "avcodec.h"
|
|
#include "get_bits.h"
|
|
#include "ivi_dsp.h"
|
|
#include "ivi_common.h"
|
|
#include "indeo5data.h"
|
|
|
|
/**
|
|
* Indeo5 frame types.
|
|
*/
|
|
enum {
|
|
FRAMETYPE_INTRA = 0,
|
|
FRAMETYPE_INTER = 1, ///< non-droppable P-frame
|
|
FRAMETYPE_INTER_SCAL = 2, ///< droppable P-frame used in the scalability mode
|
|
FRAMETYPE_INTER_NOREF = 3, ///< droppable P-frame
|
|
FRAMETYPE_NULL = 4 ///< empty frame with no data
|
|
};
|
|
|
|
#define IVI5_PIC_SIZE_ESC 15
|
|
|
|
/**
|
|
* Decode Indeo5 GOP (Group of pictures) header.
|
|
* This header is present in key frames only.
|
|
* It defines parameters for all frames in a GOP.
|
|
*
|
|
* @param[in,out] ctx ptr to the decoder context
|
|
* @param[in] avctx ptr to the AVCodecContext
|
|
* @return result code: 0 = OK, -1 = error
|
|
*/
|
|
static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
|
|
{
|
|
int result, i, p, tile_size, pic_size_indx, mb_size, blk_size;
|
|
int quant_mat, blk_size_changed = 0;
|
|
IVIBandDesc *band, *band1, *band2;
|
|
IVIPicConfig pic_conf;
|
|
|
|
ctx->gop_flags = get_bits(&ctx->gb, 8);
|
|
|
|
ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
|
|
|
|
if (ctx->gop_flags & IVI5_IS_PROTECTED)
|
|
ctx->lock_word = get_bits_long(&ctx->gb, 32);
|
|
|
|
tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
|
|
if (tile_size > 256) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* decode number of wavelet bands */
|
|
/* num_levels * 3 + 1 */
|
|
pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1;
|
|
pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1;
|
|
ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
|
|
if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
|
|
pic_conf.luma_bands, pic_conf.chroma_bands);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
pic_size_indx = get_bits(&ctx->gb, 4);
|
|
if (pic_size_indx == IVI5_PIC_SIZE_ESC) {
|
|
pic_conf.pic_height = get_bits(&ctx->gb, 13);
|
|
pic_conf.pic_width = get_bits(&ctx->gb, 13);
|
|
} else {
|
|
pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2;
|
|
pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2;
|
|
}
|
|
|
|
if (ctx->gop_flags & 2) {
|
|
avpriv_report_missing_feature(avctx, "YV12 picture format");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
|
|
pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2;
|
|
|
|
if (!tile_size) {
|
|
pic_conf.tile_height = pic_conf.pic_height;
|
|
pic_conf.tile_width = pic_conf.pic_width;
|
|
} else {
|
|
pic_conf.tile_height = pic_conf.tile_width = tile_size;
|
|
}
|
|
|
|
/* check if picture layout was changed and reallocate buffers */
|
|
if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf) || ctx->gop_invalid) {
|
|
result = ff_ivi_init_planes(ctx->planes, &pic_conf);
|
|
if (result < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
|
|
return result;
|
|
}
|
|
ctx->pic_conf = pic_conf;
|
|
blk_size_changed = 1; /* force reallocation of the internal structures */
|
|
}
|
|
|
|
for (p = 0; p <= 1; p++) {
|
|
for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
|
|
band = &ctx->planes[p].bands[i];
|
|
|
|
band->is_halfpel = get_bits1(&ctx->gb);
|
|
|
|
mb_size = get_bits1(&ctx->gb);
|
|
blk_size = 8 >> get_bits1(&ctx->gb);
|
|
mb_size = blk_size << !mb_size;
|
|
|
|
blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
|
|
if (blk_size_changed) {
|
|
band->mb_size = mb_size;
|
|
band->blk_size = blk_size;
|
|
}
|
|
|
|
if (get_bits1(&ctx->gb)) {
|
|
avpriv_report_missing_feature(avctx, "Extended transform info");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
/* select transform function and scan pattern according to plane and band number */
|
|
switch ((p << 2) + i) {
|
|
case 0:
|
|
band->inv_transform = ff_ivi_inverse_slant_8x8;
|
|
band->dc_transform = ff_ivi_dc_slant_2d;
|
|
band->scan = ff_zigzag_direct;
|
|
band->transform_size = 8;
|
|
break;
|
|
|
|
case 1:
|
|
band->inv_transform = ff_ivi_row_slant8;
|
|
band->dc_transform = ff_ivi_dc_row_slant;
|
|
band->scan = ff_ivi_vertical_scan_8x8;
|
|
band->transform_size = 8;
|
|
break;
|
|
|
|
case 2:
|
|
band->inv_transform = ff_ivi_col_slant8;
|
|
band->dc_transform = ff_ivi_dc_col_slant;
|
|
band->scan = ff_ivi_horizontal_scan_8x8;
|
|
band->transform_size = 8;
|
|
break;
|
|
|
|
case 3:
|
|
band->inv_transform = ff_ivi_put_pixels_8x8;
|
|
band->dc_transform = ff_ivi_put_dc_pixel_8x8;
|
|
band->scan = ff_ivi_horizontal_scan_8x8;
|
|
band->transform_size = 8;
|
|
break;
|
|
|
|
case 4:
|
|
band->inv_transform = ff_ivi_inverse_slant_4x4;
|
|
band->dc_transform = ff_ivi_dc_slant_2d;
|
|
band->scan = ff_ivi_direct_scan_4x4;
|
|
band->transform_size = 4;
|
|
break;
|
|
}
|
|
|
|
band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
|
|
band->inv_transform == ff_ivi_inverse_slant_4x4;
|
|
|
|
if (band->transform_size != band->blk_size)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
/* select dequant matrix according to plane and band number */
|
|
if (!p) {
|
|
quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
|
|
} else {
|
|
quant_mat = 5;
|
|
}
|
|
|
|
if (band->blk_size == 8) {
|
|
band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0];
|
|
band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0];
|
|
band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
|
|
band->inter_scale = &ivi5_scale_quant_8x8_inter[quant_mat][0];
|
|
} else {
|
|
band->intra_base = ivi5_base_quant_4x4_intra;
|
|
band->inter_base = ivi5_base_quant_4x4_inter;
|
|
band->intra_scale = ivi5_scale_quant_4x4_intra;
|
|
band->inter_scale = ivi5_scale_quant_4x4_inter;
|
|
}
|
|
|
|
if (get_bits(&ctx->gb, 2)) {
|
|
av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* copy chroma parameters into the 2nd chroma plane */
|
|
for (i = 0; i < pic_conf.chroma_bands; i++) {
|
|
band1 = &ctx->planes[1].bands[i];
|
|
band2 = &ctx->planes[2].bands[i];
|
|
|
|
band2->width = band1->width;
|
|
band2->height = band1->height;
|
|
band2->mb_size = band1->mb_size;
|
|
band2->blk_size = band1->blk_size;
|
|
band2->is_halfpel = band1->is_halfpel;
|
|
band2->intra_base = band1->intra_base;
|
|
band2->inter_base = band1->inter_base;
|
|
band2->intra_scale = band1->intra_scale;
|
|
band2->inter_scale = band1->inter_scale;
|
|
band2->scan = band1->scan;
|
|
band2->inv_transform = band1->inv_transform;
|
|
band2->dc_transform = band1->dc_transform;
|
|
band2->is_2d_trans = band1->is_2d_trans;
|
|
}
|
|
|
|
/* reallocate internal structures if needed */
|
|
if (blk_size_changed) {
|
|
result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width,
|
|
pic_conf.tile_height);
|
|
if (result < 0) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Couldn't reallocate internal structures!\n");
|
|
return result;
|
|
}
|
|
}
|
|
|
|
if (ctx->gop_flags & 8) {
|
|
if (get_bits(&ctx->gb, 3)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (get_bits1(&ctx->gb))
|
|
skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */
|
|
}
|
|
|
|
align_get_bits(&ctx->gb);
|
|
|
|
skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
|
|
|
|
/* skip GOP extension if any */
|
|
if (get_bits1(&ctx->gb)) {
|
|
do {
|
|
i = get_bits(&ctx->gb, 16);
|
|
} while (i & 0x8000);
|
|
}
|
|
|
|
align_get_bits(&ctx->gb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* Skip a header extension.
|
|
*
|
|
* @param[in,out] gb the GetBit context
|
|
*/
|
|
static inline void skip_hdr_extension(GetBitContext *gb)
|
|
{
|
|
int i, len;
|
|
|
|
do {
|
|
len = get_bits(gb, 8);
|
|
for (i = 0; i < len; i++) skip_bits(gb, 8);
|
|
} while(len);
|
|
}
|
|
|
|
|
|
/**
|
|
* Decode Indeo5 picture header.
|
|
*
|
|
* @param[in,out] ctx ptr to the decoder context
|
|
* @param[in] avctx ptr to the AVCodecContext
|
|
* @return result code: 0 = OK, -1 = error
|
|
*/
|
|
static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
|
|
{
|
|
int ret;
|
|
|
|
if (get_bits(&ctx->gb, 5) != 0x1F) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
ctx->prev_frame_type = ctx->frame_type;
|
|
ctx->frame_type = get_bits(&ctx->gb, 3);
|
|
if (ctx->frame_type >= 5) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
ctx->frame_num = get_bits(&ctx->gb, 8);
|
|
|
|
if (ctx->frame_type == FRAMETYPE_INTRA) {
|
|
if ((ret = decode_gop_header(ctx, avctx)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n");
|
|
ctx->gop_invalid = 1;
|
|
return ret;
|
|
}
|
|
ctx->gop_invalid = 0;
|
|
}
|
|
|
|
if (ctx->frame_type != FRAMETYPE_NULL) {
|
|
ctx->frame_flags = get_bits(&ctx->gb, 8);
|
|
|
|
ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
|
|
|
|
ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
|
|
|
|
/* skip unknown extension if any */
|
|
if (ctx->frame_flags & 0x20)
|
|
skip_hdr_extension(&ctx->gb); /* XXX: untested */
|
|
|
|
/* decode macroblock huffman codebook */
|
|
ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40,
|
|
IVI_MB_HUFF, &ctx->mb_vlc, avctx);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
|
|
}
|
|
|
|
align_get_bits(&ctx->gb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* Decode Indeo5 band header.
|
|
*
|
|
* @param[in,out] ctx ptr to the decoder context
|
|
* @param[in,out] band ptr to the band descriptor
|
|
* @param[in] avctx ptr to the AVCodecContext
|
|
* @return result code: 0 = OK, -1 = error
|
|
*/
|
|
static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
|
|
AVCodecContext *avctx)
|
|
{
|
|
int i, ret;
|
|
uint8_t band_flags;
|
|
|
|
band_flags = get_bits(&ctx->gb, 8);
|
|
|
|
if (band_flags & 1) {
|
|
band->is_empty = 1;
|
|
return 0;
|
|
}
|
|
|
|
band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0;
|
|
|
|
band->inherit_mv = band_flags & 2;
|
|
band->inherit_qdelta = band_flags & 8;
|
|
band->qdelta_present = band_flags & 4;
|
|
if (!band->qdelta_present) band->inherit_qdelta = 1;
|
|
|
|
/* decode rvmap probability corrections if any */
|
|
band->num_corr = 0; /* there are no corrections */
|
|
if (band_flags & 0x10) {
|
|
band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
|
|
if (band->num_corr > 61) {
|
|
av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
|
|
band->num_corr);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* read correction pairs */
|
|
for (i = 0; i < band->num_corr * 2; i++)
|
|
band->corr[i] = get_bits(&ctx->gb, 8);
|
|
}
|
|
|
|
/* select appropriate rvmap table for this band */
|
|
band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
|
|
|
|
/* decode block huffman codebook */
|
|
ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF,
|
|
&band->blk_vlc, avctx);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
band->checksum_present = get_bits1(&ctx->gb);
|
|
if (band->checksum_present)
|
|
band->checksum = get_bits(&ctx->gb, 16);
|
|
|
|
band->glob_quant = get_bits(&ctx->gb, 5);
|
|
|
|
/* skip unknown extension if any */
|
|
if (band_flags & 0x20) { /* XXX: untested */
|
|
align_get_bits(&ctx->gb);
|
|
skip_hdr_extension(&ctx->gb);
|
|
}
|
|
|
|
align_get_bits(&ctx->gb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* Decode info (block type, cbp, quant delta, motion vector)
|
|
* for all macroblocks in the current tile.
|
|
*
|
|
* @param[in,out] ctx ptr to the decoder context
|
|
* @param[in,out] band ptr to the band descriptor
|
|
* @param[in,out] tile ptr to the tile descriptor
|
|
* @param[in] avctx ptr to the AVCodecContext
|
|
* @return result code: 0 = OK, -1 = error
|
|
*/
|
|
static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
|
|
IVITile *tile, AVCodecContext *avctx)
|
|
{
|
|
int x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
|
|
mv_scale, blks_per_mb;
|
|
IVIMbInfo *mb, *ref_mb;
|
|
int row_offset = band->mb_size * band->pitch;
|
|
|
|
mb = tile->mbs;
|
|
ref_mb = tile->ref_mbs;
|
|
offs = tile->ypos * band->pitch + tile->xpos;
|
|
|
|
if (!ref_mb &&
|
|
((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size)) {
|
|
av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches parameters %d\n",
|
|
tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size));
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* scale factor for motion vectors */
|
|
mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
|
|
mv_x = mv_y = 0;
|
|
|
|
for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
|
|
mb_offset = offs;
|
|
|
|
for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
|
|
mb->xpos = x;
|
|
mb->ypos = y;
|
|
mb->buf_offs = mb_offset;
|
|
|
|
if (get_bits1(&ctx->gb)) {
|
|
if (ctx->frame_type == FRAMETYPE_INTRA) {
|
|
av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
mb->type = 1; /* empty macroblocks are always INTER */
|
|
mb->cbp = 0; /* all blocks are empty */
|
|
|
|
mb->q_delta = 0;
|
|
if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) {
|
|
mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
|
|
IVI_VLC_BITS, 1);
|
|
mb->q_delta = IVI_TOSIGNED(mb->q_delta);
|
|
}
|
|
|
|
mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
|
|
if (band->inherit_mv){
|
|
/* motion vector inheritance */
|
|
if (mv_scale) {
|
|
mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
|
|
mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
|
|
} else {
|
|
mb->mv_x = ref_mb->mv_x;
|
|
mb->mv_y = ref_mb->mv_y;
|
|
}
|
|
}
|
|
} else {
|
|
if (band->inherit_mv) {
|
|
mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
|
|
} else if (ctx->frame_type == FRAMETYPE_INTRA) {
|
|
mb->type = 0; /* mb_type is always INTRA for intra-frames */
|
|
} else {
|
|
mb->type = get_bits1(&ctx->gb);
|
|
}
|
|
|
|
blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
|
|
mb->cbp = get_bits(&ctx->gb, blks_per_mb);
|
|
|
|
mb->q_delta = 0;
|
|
if (band->qdelta_present) {
|
|
if (band->inherit_qdelta) {
|
|
if (ref_mb) mb->q_delta = ref_mb->q_delta;
|
|
} else if (mb->cbp || (!band->plane && !band->band_num &&
|
|
(ctx->frame_flags & 8))) {
|
|
mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
|
|
IVI_VLC_BITS, 1);
|
|
mb->q_delta = IVI_TOSIGNED(mb->q_delta);
|
|
}
|
|
}
|
|
|
|
if (!mb->type) {
|
|
mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
|
|
} else {
|
|
if (band->inherit_mv){
|
|
/* motion vector inheritance */
|
|
if (mv_scale) {
|
|
mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
|
|
mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
|
|
} else {
|
|
mb->mv_x = ref_mb->mv_x;
|
|
mb->mv_y = ref_mb->mv_y;
|
|
}
|
|
} else {
|
|
/* decode motion vector deltas */
|
|
mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
|
|
IVI_VLC_BITS, 1);
|
|
mv_y += IVI_TOSIGNED(mv_delta);
|
|
mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
|
|
IVI_VLC_BITS, 1);
|
|
mv_x += IVI_TOSIGNED(mv_delta);
|
|
mb->mv_x = mv_x;
|
|
mb->mv_y = mv_y;
|
|
}
|
|
}
|
|
}
|
|
|
|
mb++;
|
|
if (ref_mb)
|
|
ref_mb++;
|
|
mb_offset += band->mb_size;
|
|
}
|
|
|
|
offs += row_offset;
|
|
}
|
|
|
|
align_get_bits(&ctx->gb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* Switch buffers.
|
|
*
|
|
* @param[in,out] ctx ptr to the decoder context
|
|
*/
|
|
static void switch_buffers(IVI45DecContext *ctx)
|
|
{
|
|
switch (ctx->prev_frame_type) {
|
|
case FRAMETYPE_INTRA:
|
|
case FRAMETYPE_INTER:
|
|
ctx->buf_switch ^= 1;
|
|
ctx->dst_buf = ctx->buf_switch;
|
|
ctx->ref_buf = ctx->buf_switch ^ 1;
|
|
break;
|
|
case FRAMETYPE_INTER_SCAL:
|
|
if (!ctx->inter_scal) {
|
|
ctx->ref2_buf = 2;
|
|
ctx->inter_scal = 1;
|
|
}
|
|
FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
|
|
ctx->ref_buf = ctx->ref2_buf;
|
|
break;
|
|
case FRAMETYPE_INTER_NOREF:
|
|
break;
|
|
}
|
|
|
|
switch (ctx->frame_type) {
|
|
case FRAMETYPE_INTRA:
|
|
ctx->buf_switch = 0;
|
|
/* FALLTHROUGH */
|
|
case FRAMETYPE_INTER:
|
|
ctx->inter_scal = 0;
|
|
ctx->dst_buf = ctx->buf_switch;
|
|
ctx->ref_buf = ctx->buf_switch ^ 1;
|
|
break;
|
|
case FRAMETYPE_INTER_SCAL:
|
|
case FRAMETYPE_INTER_NOREF:
|
|
case FRAMETYPE_NULL:
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static int is_nonnull_frame(IVI45DecContext *ctx)
|
|
{
|
|
return ctx->frame_type != FRAMETYPE_NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
* Initialize Indeo5 decoder.
|
|
*/
|
|
static av_cold int decode_init(AVCodecContext *avctx)
|
|
{
|
|
IVI45DecContext *ctx = avctx->priv_data;
|
|
int result;
|
|
|
|
ff_ivi_init_static_vlc();
|
|
|
|
/* copy rvmap tables in our context so we can apply changes to them */
|
|
memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
|
|
|
|
/* set the initial picture layout according to the basic profile:
|
|
there is only one band per plane (no scalability), only one tile (no local decoding)
|
|
and picture format = YVU9 */
|
|
ctx->pic_conf.pic_width = avctx->width;
|
|
ctx->pic_conf.pic_height = avctx->height;
|
|
ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2;
|
|
ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2;
|
|
ctx->pic_conf.tile_width = avctx->width;
|
|
ctx->pic_conf.tile_height = avctx->height;
|
|
ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1;
|
|
|
|
result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf);
|
|
if (result) {
|
|
av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
ctx->buf_switch = 0;
|
|
ctx->inter_scal = 0;
|
|
|
|
ctx->decode_pic_hdr = decode_pic_hdr;
|
|
ctx->decode_band_hdr = decode_band_hdr;
|
|
ctx->decode_mb_info = decode_mb_info;
|
|
ctx->switch_buffers = switch_buffers;
|
|
ctx->is_nonnull_frame = is_nonnull_frame;
|
|
|
|
ctx->is_indeo4 = 0;
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
AVCodec ff_indeo5_decoder = {
|
|
.name = "indeo5",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_INDEO5,
|
|
.priv_data_size = sizeof(IVI45DecContext),
|
|
.init = decode_init,
|
|
.close = ff_ivi_decode_close,
|
|
.decode = ff_ivi_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
};
|