mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
648 lines
23 KiB
648 lines
23 KiB
/* |
|
* Indeo Video Interactive v4 compatible decoder |
|
* Copyright (c) 2009-2011 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 4 decoder |
|
* |
|
* Indeo 4 data is usually transported within .avi or .mov files. |
|
* Known FOURCCs: 'IV41' |
|
*/ |
|
|
|
#define BITSTREAM_READER_LE |
|
#include "avcodec.h" |
|
#include "get_bits.h" |
|
#include "dsputil.h" |
|
#include "ivi_dsp.h" |
|
#include "ivi_common.h" |
|
#include "indeo4data.h" |
|
|
|
/** |
|
* Indeo 4 frame types. |
|
*/ |
|
enum { |
|
FRAMETYPE_INTRA = 0, |
|
FRAMETYPE_INTRA1 = 1, ///< intra frame with slightly different bitstream coding |
|
FRAMETYPE_INTER = 2, ///< non-droppable P-frame |
|
FRAMETYPE_BIDIR = 3, ///< bidirectional frame |
|
FRAMETYPE_INTER_NOREF = 4, ///< droppable P-frame |
|
FRAMETYPE_NULL_FIRST = 5, ///< empty frame with no data |
|
FRAMETYPE_NULL_LAST = 6 ///< empty frame with no data |
|
}; |
|
|
|
#define IVI4_PIC_SIZE_ESC 7 |
|
|
|
|
|
static const struct { |
|
InvTransformPtr *inv_trans; |
|
DCTransformPtr *dc_trans; |
|
int is_2d_trans; |
|
} transforms[18] = { |
|
{ ff_ivi_inverse_haar_8x8, ff_ivi_dc_haar_2d, 1 }, |
|
{ NULL, NULL, 0 }, /* inverse Haar 8x1 */ |
|
{ NULL, NULL, 0 }, /* inverse Haar 1x8 */ |
|
{ ff_ivi_put_pixels_8x8, ff_ivi_put_dc_pixel_8x8, 1 }, |
|
{ ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d, 1 }, |
|
{ ff_ivi_row_slant8, ff_ivi_dc_row_slant, 1 }, |
|
{ ff_ivi_col_slant8, ff_ivi_dc_col_slant, 1 }, |
|
{ NULL, NULL, 0 }, /* inverse DCT 8x8 */ |
|
{ NULL, NULL, 0 }, /* inverse DCT 8x1 */ |
|
{ NULL, NULL, 0 }, /* inverse DCT 1x8 */ |
|
{ NULL, NULL, 0 }, /* inverse Haar 4x4 */ |
|
{ ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d, 1 }, |
|
{ NULL, NULL, 0 }, /* no transform 4x4 */ |
|
{ NULL, NULL, 0 }, /* inverse Haar 1x4 */ |
|
{ NULL, NULL, 0 }, /* inverse Haar 4x1 */ |
|
{ NULL, NULL, 0 }, /* inverse slant 1x4 */ |
|
{ NULL, NULL, 0 }, /* inverse slant 4x1 */ |
|
{ NULL, NULL, 0 }, /* inverse DCT 4x4 */ |
|
}; |
|
|
|
/** |
|
* Decode subdivision of a plane. |
|
* This is a simplified version that checks for two supported subdivisions: |
|
* - 1 wavelet band per plane, size factor 1:1, code pattern: 3 |
|
* - 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3 |
|
* Anything else is either unsupported or corrupt. |
|
* |
|
* @param[in,out] gb the GetBit context |
|
* @return number of wavelet bands or 0 on error |
|
*/ |
|
static int decode_plane_subdivision(GetBitContext *gb) |
|
{ |
|
int i; |
|
|
|
switch (get_bits(gb, 2)) { |
|
case 3: |
|
return 1; |
|
case 2: |
|
for (i = 0; i < 4; i++) |
|
if (get_bits(gb, 2) != 3) |
|
return 0; |
|
return 4; |
|
default: |
|
return 0; |
|
} |
|
} |
|
|
|
static inline int scale_tile_size(int def_size, int size_factor) |
|
{ |
|
return size_factor == 15 ? def_size : (size_factor + 1) << 5; |
|
} |
|
|
|
/** |
|
* Decode Indeo 4 picture header. |
|
* |
|
* @param[in,out] ctx pointer to the decoder context |
|
* @param[in] avctx pointer to the AVCodecContext |
|
* @return result code: 0 = OK, negative number = error |
|
*/ |
|
static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) |
|
{ |
|
int pic_size_indx, i, p; |
|
IVIPicConfig pic_conf; |
|
|
|
if (get_bits(&ctx->gb, 18) != 0x3FFF8) { |
|
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 == 7) { |
|
av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
#if IVI4_STREAM_ANALYSER |
|
if (ctx->frame_type == FRAMETYPE_BIDIR) |
|
ctx->has_b_frames = 1; |
|
#endif |
|
|
|
ctx->transp_status = get_bits1(&ctx->gb); |
|
#if IVI4_STREAM_ANALYSER |
|
if (ctx->transp_status) { |
|
ctx->has_transp = 1; |
|
} |
|
#endif |
|
|
|
/* unknown bit: Mac decoder ignores this bit, XANIM returns error */ |
|
if (get_bits1(&ctx->gb)) { |
|
av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0; |
|
|
|
/* null frames don't contain anything else so we just return */ |
|
if (ctx->frame_type >= FRAMETYPE_NULL_FIRST) { |
|
av_dlog(avctx, "Null frame encountered!\n"); |
|
return 0; |
|
} |
|
|
|
/* Check key lock status. If enabled - ignore lock word. */ |
|
/* Usually we have to prompt the user for the password, but */ |
|
/* we don't do that because Indeo 4 videos can be decoded anyway */ |
|
if (get_bits1(&ctx->gb)) { |
|
skip_bits_long(&ctx->gb, 32); |
|
av_dlog(avctx, "Password-protected clip!\n"); |
|
} |
|
|
|
pic_size_indx = get_bits(&ctx->gb, 3); |
|
if (pic_size_indx == IVI4_PIC_SIZE_ESC) { |
|
pic_conf.pic_height = get_bits(&ctx->gb, 16); |
|
pic_conf.pic_width = get_bits(&ctx->gb, 16); |
|
} else { |
|
pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1]; |
|
pic_conf.pic_width = ivi4_common_pic_sizes[pic_size_indx * 2 ]; |
|
} |
|
|
|
/* Decode tile dimensions. */ |
|
if (get_bits1(&ctx->gb)) { |
|
pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4)); |
|
pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, get_bits(&ctx->gb, 4)); |
|
#if IVI4_STREAM_ANALYSER |
|
ctx->uses_tiling = 1; |
|
#endif |
|
} else { |
|
pic_conf.tile_height = pic_conf.pic_height; |
|
pic_conf.tile_width = pic_conf.pic_width; |
|
} |
|
|
|
/* Decode chroma subsampling. We support only 4:4 aka YVU9. */ |
|
if (get_bits(&ctx->gb, 2)) { |
|
av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; |
|
pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; |
|
|
|
/* decode subdivision of the planes */ |
|
pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb); |
|
if (pic_conf.luma_bands) |
|
pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb); |
|
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; |
|
} |
|
|
|
/* check if picture layout was changed and reallocate buffers */ |
|
if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) { |
|
if (ff_ivi_init_planes(ctx->planes, &pic_conf)) { |
|
av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); |
|
return AVERROR(ENOMEM); |
|
} |
|
|
|
ctx->pic_conf = pic_conf; |
|
|
|
/* set default macroblock/block dimensions */ |
|
for (p = 0; p <= 2; p++) { |
|
for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { |
|
ctx->planes[p].bands[i].mb_size = !p ? (!ctx->is_scalable ? 16 : 8) : 4; |
|
ctx->planes[p].bands[i].blk_size = !p ? 8 : 4; |
|
} |
|
} |
|
|
|
if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width, |
|
ctx->pic_conf.tile_height)) { |
|
av_log(avctx, AV_LOG_ERROR, |
|
"Couldn't reallocate internal structures!\n"); |
|
return AVERROR(ENOMEM); |
|
} |
|
} |
|
|
|
ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0; |
|
|
|
/* skip decTimeEst field if present */ |
|
if (get_bits1(&ctx->gb)) |
|
skip_bits(&ctx->gb, 8); |
|
|
|
/* decode macroblock and block huffman codebooks */ |
|
if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF, &ctx->mb_vlc, avctx) || |
|
ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx)) |
|
return AVERROR_INVALIDDATA; |
|
|
|
ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; |
|
|
|
ctx->in_imf = get_bits1(&ctx->gb); |
|
ctx->in_q = get_bits1(&ctx->gb); |
|
|
|
ctx->pic_glob_quant = get_bits(&ctx->gb, 5); |
|
|
|
/* TODO: ignore this parameter if unused */ |
|
ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0; |
|
|
|
ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0; |
|
|
|
/* skip picture header extension if any */ |
|
while (get_bits1(&ctx->gb)) { |
|
av_dlog(avctx, "Pic hdr extension encountered!\n"); |
|
skip_bits(&ctx->gb, 8); |
|
} |
|
|
|
if (get_bits1(&ctx->gb)) { |
|
av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n"); |
|
} |
|
|
|
align_get_bits(&ctx->gb); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
/** |
|
* Decode Indeo 4 band header. |
|
* |
|
* @param[in,out] ctx pointer to the decoder context |
|
* @param[in,out] band pointer to the band descriptor |
|
* @param[in] avctx pointer to the AVCodecContext |
|
* @return result code: 0 = OK, negative number = error |
|
*/ |
|
static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band, |
|
AVCodecContext *avctx) |
|
{ |
|
int plane, band_num, indx, transform_id, scan_indx; |
|
int i; |
|
int quant_mat; |
|
|
|
plane = get_bits(&ctx->gb, 2); |
|
band_num = get_bits(&ctx->gb, 4); |
|
if (band->plane != plane || band->band_num != band_num) { |
|
av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
band->is_empty = get_bits1(&ctx->gb); |
|
if (!band->is_empty) { |
|
/* skip header size |
|
* If header size is not given, header size is 4 bytes. */ |
|
if (get_bits1(&ctx->gb)) |
|
skip_bits(&ctx->gb, 16); |
|
|
|
band->is_halfpel = get_bits(&ctx->gb, 2); |
|
if (band->is_halfpel >= 2) { |
|
av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n", |
|
band->is_halfpel); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
#if IVI4_STREAM_ANALYSER |
|
if (!band->is_halfpel) |
|
ctx->uses_fullpel = 1; |
|
#endif |
|
|
|
band->checksum_present = get_bits1(&ctx->gb); |
|
if (band->checksum_present) |
|
band->checksum = get_bits(&ctx->gb, 16); |
|
|
|
indx = get_bits(&ctx->gb, 2); |
|
if (indx == 3) { |
|
av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
band->mb_size = 16 >> indx; |
|
band->blk_size = 8 >> (indx >> 1); |
|
|
|
band->inherit_mv = get_bits1(&ctx->gb); |
|
band->inherit_qdelta = get_bits1(&ctx->gb); |
|
|
|
band->glob_quant = get_bits(&ctx->gb, 5); |
|
|
|
if (!get_bits1(&ctx->gb) || ctx->frame_type == FRAMETYPE_INTRA) { |
|
transform_id = get_bits(&ctx->gb, 5); |
|
if (transform_id >= FF_ARRAY_ELEMS(transforms) || |
|
!transforms[transform_id].inv_trans) { |
|
av_log_ask_for_sample(avctx, "Unimplemented transform: %d!\n", transform_id); |
|
return AVERROR_PATCHWELCOME; |
|
} |
|
if ((transform_id >= 7 && transform_id <= 9) || |
|
transform_id == 17) { |
|
av_log_ask_for_sample(avctx, "DCT transform not supported yet!\n"); |
|
return AVERROR_PATCHWELCOME; |
|
} |
|
|
|
if (transform_id < 10 && band->blk_size < 8) { |
|
av_log(avctx, AV_LOG_ERROR, "wrong transform size!\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
#if IVI4_STREAM_ANALYSER |
|
if ((transform_id >= 0 && transform_id <= 2) || transform_id == 10) |
|
ctx->uses_haar = 1; |
|
#endif |
|
|
|
band->inv_transform = transforms[transform_id].inv_trans; |
|
band->dc_transform = transforms[transform_id].dc_trans; |
|
band->is_2d_trans = transforms[transform_id].is_2d_trans; |
|
band->transform_size= (transform_id < 10) ? 8 : 4; |
|
|
|
scan_indx = get_bits(&ctx->gb, 4); |
|
if ((scan_indx>4 && scan_indx<10) != (band->blk_size==4)) { |
|
av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
if (scan_indx == 15) { |
|
av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
band->scan = scan_index_to_tab[scan_indx]; |
|
|
|
quant_mat = get_bits(&ctx->gb, 5); |
|
if (quant_mat == 31) { |
|
av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
if (quant_mat > 21) { |
|
av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix encountered!\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
band->quant_mat = quant_mat; |
|
} |
|
if (quant_index_to_tab[band->quant_mat] > 4 && band->blk_size == 4) { |
|
av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix for 4x4 block encountered!\n"); |
|
band->quant_mat = 0; |
|
return AVERROR_INVALIDDATA; |
|
} |
|
/* decode block huffman codebook */ |
|
if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, |
|
&band->blk_vlc, avctx)) |
|
return AVERROR_INVALIDDATA; |
|
|
|
/* select appropriate rvmap table for this band */ |
|
band->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8; |
|
|
|
/* decode rvmap probability corrections if any */ |
|
band->num_corr = 0; /* there is no corrections */ |
|
if (get_bits1(&ctx->gb)) { |
|
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); |
|
} |
|
} |
|
|
|
if (band->blk_size == 8) { |
|
band->intra_base = &ivi4_quant_8x8_intra[quant_index_to_tab[band->quant_mat]][0]; |
|
band->inter_base = &ivi4_quant_8x8_inter[quant_index_to_tab[band->quant_mat]][0]; |
|
} else { |
|
band->intra_base = &ivi4_quant_4x4_intra[quant_index_to_tab[band->quant_mat]][0]; |
|
band->inter_base = &ivi4_quant_4x4_inter[quant_index_to_tab[band->quant_mat]][0]; |
|
} |
|
|
|
/* Indeo 4 doesn't use scale tables */ |
|
band->intra_scale = NULL; |
|
band->inter_scale = NULL; |
|
|
|
align_get_bits(&ctx->gb); |
|
|
|
if (!band->scan) { |
|
av_log(avctx, AV_LOG_ERROR, "band->scan not set\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
|
|
/** |
|
* Decode information (block type, cbp, quant delta, motion vector) |
|
* for all macroblocks in the current tile. |
|
* |
|
* @param[in,out] ctx pointer to the decoder context |
|
* @param[in,out] band pointer to the band descriptor |
|
* @param[in,out] tile pointer to the tile descriptor |
|
* @param[in] avctx pointer to the AVCodecContext |
|
* @return result code: 0 = OK, negative number = 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, blks_per_mb, |
|
mv_scale, mb_type_bits, s; |
|
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; |
|
|
|
blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; |
|
mb_type_bits = ctx->frame_type == FRAMETYPE_BIDIR ? 2 : 1; |
|
|
|
/* scale factor for motion vectors */ |
|
mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); |
|
mv_x = mv_y = 0; |
|
|
|
if (((tile->width + band->mb_size-1)/band->mb_size) * ((tile->height + band->mb_size-1)/band->mb_size) != tile->num_MBs) { |
|
av_log(avctx, AV_LOG_ERROR, "num_MBs mismatch %d %d %d %d\n", tile->width, tile->height, band->mb_size, tile->num_MBs); |
|
return -1; |
|
} |
|
|
|
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->in_q) { |
|
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 && ref_mb) { |
|
/* 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 && ref_mb) { |
|
mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */ |
|
} else if (ctx->frame_type == FRAMETYPE_INTRA || |
|
ctx->frame_type == FRAMETYPE_INTRA1) { |
|
mb->type = 0; /* mb_type is always INTRA for intra-frames */ |
|
} else { |
|
mb->type = get_bits(&ctx->gb, mb_type_bits); |
|
} |
|
|
|
mb->cbp = get_bits(&ctx->gb, blks_per_mb); |
|
|
|
mb->q_delta = 0; |
|
if (band->inherit_qdelta) { |
|
if (ref_mb) mb->q_delta = ref_mb->q_delta; |
|
} else if (mb->cbp || (!band->plane && !band->band_num && |
|
ctx->in_q)) { |
|
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 && ref_mb) { |
|
/* 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; |
|
} |
|
} |
|
} |
|
|
|
s= band->is_halfpel; |
|
if (mb->type) |
|
if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 || |
|
x + ((mb->mv_x+s)>>s) + band->mb_size - 1 |
|
+ (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize -1) { |
|
av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
mb++; |
|
if (ref_mb) |
|
ref_mb++; |
|
mb_offset += band->mb_size; |
|
} |
|
|
|
offs += row_offset; |
|
} |
|
|
|
align_get_bits(&ctx->gb); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
/** |
|
* Rearrange decoding and reference buffers. |
|
* |
|
* @param[in,out] ctx pointer to the decoder context |
|
*/ |
|
static void switch_buffers(IVI45DecContext *ctx) |
|
{ |
|
switch (ctx->prev_frame_type) { |
|
case FRAMETYPE_INTRA: |
|
case FRAMETYPE_INTRA1: |
|
case FRAMETYPE_INTER: |
|
ctx->buf_switch ^= 1; |
|
ctx->dst_buf = ctx->buf_switch; |
|
ctx->ref_buf = ctx->buf_switch ^ 1; |
|
break; |
|
case FRAMETYPE_INTER_NOREF: |
|
break; |
|
} |
|
|
|
switch (ctx->frame_type) { |
|
case FRAMETYPE_INTRA: |
|
case FRAMETYPE_INTRA1: |
|
ctx->buf_switch = 0; |
|
/* FALLTHROUGH */ |
|
case FRAMETYPE_INTER: |
|
ctx->dst_buf = ctx->buf_switch; |
|
ctx->ref_buf = ctx->buf_switch ^ 1; |
|
break; |
|
case FRAMETYPE_INTER_NOREF: |
|
case FRAMETYPE_NULL_FIRST: |
|
case FRAMETYPE_NULL_LAST: |
|
break; |
|
} |
|
} |
|
|
|
|
|
static int is_nonnull_frame(IVI45DecContext *ctx) |
|
{ |
|
return ctx->frame_type < FRAMETYPE_NULL_FIRST; |
|
} |
|
|
|
|
|
static av_cold int decode_init(AVCodecContext *avctx) |
|
{ |
|
IVI45DecContext *ctx = avctx->priv_data; |
|
|
|
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)); |
|
|
|
/* Force allocation of the internal buffers */ |
|
/* during picture header decoding. */ |
|
ctx->pic_conf.pic_width = 0; |
|
ctx->pic_conf.pic_height = 0; |
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV410P; |
|
|
|
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; |
|
|
|
return 0; |
|
} |
|
|
|
|
|
AVCodec ff_indeo4_decoder = { |
|
.name = "indeo4", |
|
.type = AVMEDIA_TYPE_VIDEO, |
|
.id = AV_CODEC_ID_INDEO4, |
|
.priv_data_size = sizeof(IVI45DecContext), |
|
.init = decode_init, |
|
.close = ff_ivi_decode_close, |
|
.decode = ff_ivi_decode_frame, |
|
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"), |
|
};
|
|
|