2011-12-06 13:50:32 +00:00
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/*
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* Indeo Video Interactive v4 compatible decoder
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* Copyright (c) 2009-2011 Maxim Poliakovski
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Indeo Video Interactive version 4 decoder
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*
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* Indeo 4 data is usually transported within .avi or .mov files.
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* Known FOURCCs: 'IV41'
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*/
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#define BITSTREAM_READER_LE
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#include "avcodec.h"
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#include "get_bits.h"
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#include "dsputil.h"
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#include "ivi_dsp.h"
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#include "ivi_common.h"
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#include "indeo4data.h"
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#define IVI4_STREAM_ANALYSER 0
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#define IVI4_DEBUG_CHECKSUM 0
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/**
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* Indeo 4 frame types.
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*/
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enum {
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FRAMETYPE_INTRA = 0,
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FRAMETYPE_BIDIR1 = 1, ///< bidirectional frame
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FRAMETYPE_INTER = 2, ///< non-droppable P-frame
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FRAMETYPE_BIDIR = 3, ///< bidirectional frame
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FRAMETYPE_INTER_NOREF = 4, ///< droppable P-frame
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FRAMETYPE_NULL_FIRST = 5, ///< empty frame with no data
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FRAMETYPE_NULL_LAST = 6 ///< empty frame with no data
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};
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#define IVI4_PIC_SIZE_ESC 7
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typedef struct {
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GetBitContext gb;
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AVFrame frame;
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RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables
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uint32_t frame_num;
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int frame_type;
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int prev_frame_type; ///< frame type of the previous frame
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uint32_t data_size; ///< size of the frame data in bytes from picture header
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int is_scalable;
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int transp_status; ///< transparency mode status: 1 - enabled
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IVIPicConfig pic_conf;
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IVIPlaneDesc planes[3]; ///< color planes
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int buf_switch; ///< used to switch between three buffers
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int dst_buf; ///< buffer index for the currently decoded frame
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int ref_buf; ///< inter frame reference buffer index
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IVIHuffTab mb_vlc; ///< current macroblock table descriptor
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IVIHuffTab blk_vlc; ///< current block table descriptor
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uint16_t checksum; ///< frame checksum
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uint8_t rvmap_sel;
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uint8_t in_imf;
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uint8_t in_q; ///< flag for explicitly stored quantiser delta
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uint8_t pic_glob_quant;
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uint8_t unknown1;
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#if IVI4_STREAM_ANALYSER
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uint8_t has_b_frames;
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uint8_t has_transp;
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uint8_t uses_tiling;
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uint8_t uses_haar;
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uint8_t uses_fullpel;
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#endif
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} IVI4DecContext;
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2012-01-08 17:17:07 +00:00
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static const struct {
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2011-12-06 13:50:32 +00:00
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InvTransformPtr *inv_trans;
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DCTransformPtr *dc_trans;
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int is_2d_trans;
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} transforms[18] = {
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{ ff_ivi_inverse_haar_8x8, ff_ivi_dc_haar_2d, 1 },
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{ NULL, NULL, 0 }, /* inverse Haar 8x1 */
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{ NULL, NULL, 0 }, /* inverse Haar 1x8 */
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{ ff_ivi_put_pixels_8x8, ff_ivi_put_dc_pixel_8x8, 1 },
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{ ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d, 1 },
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{ ff_ivi_row_slant8, ff_ivi_dc_row_slant, 1 },
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{ ff_ivi_col_slant8, ff_ivi_dc_col_slant, 1 },
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{ NULL, NULL, 0 }, /* inverse DCT 8x8 */
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{ NULL, NULL, 0 }, /* inverse DCT 8x1 */
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{ NULL, NULL, 0 }, /* inverse DCT 1x8 */
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{ NULL, NULL, 0 }, /* inverse Haar 4x4 */
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{ ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d, 1 },
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{ NULL, NULL, 0 }, /* no transform 4x4 */
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{ NULL, NULL, 0 }, /* inverse Haar 1x4 */
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{ NULL, NULL, 0 }, /* inverse Haar 4x1 */
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{ NULL, NULL, 0 }, /* inverse slant 1x4 */
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{ NULL, NULL, 0 }, /* inverse slant 4x1 */
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{ NULL, NULL, 0 }, /* inverse DCT 4x4 */
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};
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/**
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* Decode subdivision of a plane.
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* This is a simplified version that checks for two supported subdivisions:
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* - 1 wavelet band per plane, size factor 1:1, code pattern: 3
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* - 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3
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* Anything else is either unsupported or corrupt.
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*
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* @param[in,out] gb the GetBit context
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* @return number of wavelet bands or 0 on error
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*/
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static int decode_plane_subdivision(GetBitContext *gb)
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{
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int i;
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switch (get_bits(gb, 2)) {
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case 3:
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return 1;
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case 2:
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for (i = 0; i < 4; i++)
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if (get_bits(gb, 2) != 3)
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return 0;
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return 4;
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default:
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return 0;
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}
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}
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static inline int scale_tile_size(int def_size, int size_factor)
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{
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2011-12-29 21:23:16 +00:00
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return size_factor == 15 ? def_size : (size_factor + 1) << 5;
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2011-12-06 13:50:32 +00:00
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}
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/**
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* Decode Indeo 4 picture header.
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*
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* @param[in,out] ctx pointer to the decoder context
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* @param[in] avctx pointer to the AVCodecContext
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* @return result code: 0 = OK, negative number = error
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*/
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static int decode_pic_hdr(IVI4DecContext *ctx, AVCodecContext *avctx)
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{
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2011-12-29 16:25:26 +00:00
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int pic_size_indx, i, p;
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2011-12-06 13:50:32 +00:00
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IVIPicConfig pic_conf;
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if (get_bits(&ctx->gb, 18) != 0x3FFF8) {
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av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
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return AVERROR_INVALIDDATA;
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}
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ctx->prev_frame_type = ctx->frame_type;
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ctx->frame_type = get_bits(&ctx->gb, 3);
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if (ctx->frame_type == 7) {
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av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type);
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return AVERROR_INVALIDDATA;
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}
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#if IVI4_STREAM_ANALYSER
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if ( ctx->frame_type == FRAMETYPE_BIDIR1
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|| ctx->frame_type == FRAMETYPE_BIDIR)
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ctx->has_b_frames = 1;
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#endif
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ctx->transp_status = get_bits1(&ctx->gb);
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#if IVI4_STREAM_ANALYSER
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if (ctx->transp_status) {
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ctx->has_transp = 1;
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}
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#endif
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/* unknown bit: Mac decoder ignores this bit, XANIM returns error */
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if (get_bits1(&ctx->gb)) {
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av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n");
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return AVERROR_INVALIDDATA;
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}
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ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0;
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/* null frames don't contain anything else so we just return */
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if (ctx->frame_type >= FRAMETYPE_NULL_FIRST) {
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av_dlog(avctx, "Null frame encountered!\n");
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return 0;
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}
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/* Check key lock status. If enabled - ignore lock word. */
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/* Usually we have to prompt the user for the password, but */
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/* we don't do that because Indeo 4 videos can be decoded anyway */
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if (get_bits1(&ctx->gb)) {
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skip_bits_long(&ctx->gb, 32);
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av_dlog(avctx, "Password-protected clip!\n");
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}
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pic_size_indx = get_bits(&ctx->gb, 3);
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if (pic_size_indx == IVI4_PIC_SIZE_ESC) {
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pic_conf.pic_height = get_bits(&ctx->gb, 16);
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pic_conf.pic_width = get_bits(&ctx->gb, 16);
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} else {
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pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1];
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pic_conf.pic_width = ivi4_common_pic_sizes[pic_size_indx * 2 ];
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}
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/* Decode tile dimensions. */
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if (get_bits1(&ctx->gb)) {
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pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4));
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pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, get_bits(&ctx->gb, 4));
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#if IVI4_STREAM_ANALYSER
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ctx->uses_tiling = 1;
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#endif
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} else {
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pic_conf.tile_height = pic_conf.pic_height;
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pic_conf.tile_width = pic_conf.pic_width;
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}
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/* Decode chroma subsampling. We support only 4:4 aka YVU9. */
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if (get_bits(&ctx->gb, 2)) {
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av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n");
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return AVERROR_INVALIDDATA;
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}
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pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
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pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2;
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/* decode subdivision of the planes */
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pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb);
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if (pic_conf.luma_bands)
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pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb);
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ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
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if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
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av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
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pic_conf.luma_bands, pic_conf.chroma_bands);
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return AVERROR_INVALIDDATA;
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}
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/* check if picture layout was changed and reallocate buffers */
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if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
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if (ff_ivi_init_planes(ctx->planes, &pic_conf)) {
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av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
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return AVERROR(ENOMEM);
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}
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ctx->pic_conf = pic_conf;
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/* set default macroblock/block dimensions */
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for (p = 0; p <= 2; p++) {
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for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
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ctx->planes[p].bands[i].mb_size = !p ? (!ctx->is_scalable ? 16 : 8) : 4;
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ctx->planes[p].bands[i].blk_size = !p ? 8 : 4;
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}
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}
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if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width,
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ctx->pic_conf.tile_height)) {
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av_log(avctx, AV_LOG_ERROR,
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"Couldn't reallocate internal structures!\n");
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return AVERROR(ENOMEM);
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}
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}
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ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0;
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/* skip decTimeEst field if present */
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if (get_bits1(&ctx->gb))
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skip_bits(&ctx->gb, 8);
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/* decode macroblock and block huffman codebooks */
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if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF, &ctx->mb_vlc, avctx) ||
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ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx))
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return AVERROR_INVALIDDATA;
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ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8;
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ctx->in_imf = get_bits1(&ctx->gb);
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ctx->in_q = get_bits1(&ctx->gb);
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ctx->pic_glob_quant = get_bits(&ctx->gb, 5);
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/* TODO: ignore this parameter if unused */
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ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0;
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ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0;
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/* skip picture header extension if any */
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while (get_bits1(&ctx->gb)) {
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av_dlog(avctx, "Pic hdr extension encountered!\n");
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2011-12-29 16:25:26 +00:00
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skip_bits(&ctx->gb, 8);
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2011-12-06 13:50:32 +00:00
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}
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if (get_bits1(&ctx->gb)) {
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av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n");
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}
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align_get_bits(&ctx->gb);
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return 0;
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}
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/**
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* Decode Indeo 4 band header.
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*
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* @param[in,out] ctx pointer to the decoder context
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* @param[in,out] band pointer to the band descriptor
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* @param[in] avctx pointer to the AVCodecContext
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* @return result code: 0 = OK, negative number = error
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*/
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static int decode_band_hdr(IVI4DecContext *ctx, IVIBandDesc *band,
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AVCodecContext *avctx)
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{
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2011-12-29 16:25:26 +00:00
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int plane, band_num, indx, transform_id, scan_indx;
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2011-12-06 13:50:32 +00:00
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int i;
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plane = get_bits(&ctx->gb, 2);
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band_num = get_bits(&ctx->gb, 4);
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if (band->plane != plane || band->band_num != band_num) {
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av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n");
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return AVERROR_INVALIDDATA;
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}
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|
|
band->is_empty = get_bits1(&ctx->gb);
|
|
|
|
if (!band->is_empty) {
|
2011-12-29 16:25:26 +00:00
|
|
|
/* skip header size
|
|
|
|
* If header size is not given, header size is 4 bytes. */
|
|
|
|
if (get_bits1(&ctx->gb))
|
|
|
|
skip_bits(&ctx->gb, 16);
|
2011-12-06 13:50:32 +00:00
|
|
|
|
|
|
|
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);
|
2012-03-21 17:39:10 +00:00
|
|
|
if (transform_id >= FF_ARRAY_ELEMS(transforms) ||
|
|
|
|
!transforms[transform_id].inv_trans) {
|
2011-12-06 13:50:32 +00:00
|
|
|
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 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;
|
|
|
|
|
|
|
|
scan_indx = get_bits(&ctx->gb, 4);
|
|
|
|
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];
|
|
|
|
|
|
|
|
band->quant_mat = get_bits(&ctx->gb, 5);
|
|
|
|
if (band->quant_mat == 31) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n");
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
2012-03-24 11:29:05 +00:00
|
|
|
if (band->quant_mat > 21) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix encountered!\n");
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
2011-12-06 13:50:32 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* 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);
|
|
|
|
|
2012-03-23 03:18:10 +00:00
|
|
|
if (!band->scan) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "band->scan not set\n");
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
|
|
|
|
2011-12-06 13:50:32 +00:00
|
|
|
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(IVI4DecContext *ctx, IVIBandDesc *band,
|
|
|
|
IVITile *tile, AVCodecContext *avctx)
|
|
|
|
{
|
|
|
|
int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, blks_per_mb,
|
2012-03-22 21:44:54 +00:00
|
|
|
mv_scale, mb_type_bits, s;
|
2011-12-06 13:50:32 +00:00
|
|
|
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;
|
|
|
|
|
|
|
|
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) {
|
|
|
|
/* 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 {
|
2012-03-23 10:03:53 +00:00
|
|
|
if (band->inherit_mv && ref_mb) {
|
2011-12-06 13:50:32 +00:00
|
|
|
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_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) {
|
|
|
|
/* 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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-03-22 21:44:54 +00:00
|
|
|
s= band->is_halfpel;
|
|
|
|
if (mb->type)
|
|
|
|
if ( x + (mv_x >>s) + (y+ (mv_y >>s))*band->pitch < 0 ||
|
|
|
|
x + ((mv_x+s)>>s) + band->mb_size - 1
|
|
|
|
+ (y+band->mb_size - 1 +((mv_y+s)>>s))*band->pitch > band->height*band->pitch -1) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mv_x, y*s + mv_y);
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
|
|
|
|
2011-12-06 13:50:32 +00:00
|
|
|
mb++;
|
|
|
|
if (ref_mb)
|
|
|
|
ref_mb++;
|
|
|
|
mb_offset += band->mb_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
offs += row_offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
align_get_bits(&ctx->gb);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Decode an Indeo 4 band.
|
|
|
|
*
|
|
|
|
* @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(IVI4DecContext *ctx, int plane_num,
|
|
|
|
IVIBandDesc *band, AVCodecContext *avctx)
|
|
|
|
{
|
|
|
|
int result, i, t, pos, idx1, idx2;
|
|
|
|
IVITile *tile;
|
|
|
|
|
|
|
|
band->buf = band->bufs[ctx->dst_buf];
|
|
|
|
band->ref_buf = band->bufs[ctx->ref_buf];
|
|
|
|
|
|
|
|
result = decode_band_hdr(ctx, band, avctx);
|
|
|
|
if (result) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Error decoding band header\n");
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (band->is_empty) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
|
|
|
|
|
|
|
band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
|
|
|
|
|
|
|
|
/* apply corrections to the selected rvmap table if present */
|
|
|
|
for (i = 0; i < band->num_corr; i++) {
|
|
|
|
idx1 = band->corr[i * 2];
|
|
|
|
idx2 = band->corr[i * 2 + 1];
|
|
|
|
FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
|
|
|
|
FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
|
|
|
|
}
|
|
|
|
|
|
|
|
pos = get_bits_count(&ctx->gb);
|
|
|
|
|
|
|
|
for (t = 0; t < band->num_tiles; t++) {
|
|
|
|
tile = &band->tiles[t];
|
|
|
|
|
|
|
|
tile->is_empty = get_bits1(&ctx->gb);
|
|
|
|
if (tile->is_empty) {
|
|
|
|
ff_ivi_process_empty_tile(avctx, band, tile,
|
|
|
|
(ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
|
|
|
|
av_dlog(avctx, "Empty tile encountered!\n");
|
|
|
|
} else {
|
|
|
|
tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
|
|
|
|
if (!tile->data_size) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Tile data size is zero!\n");
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = decode_mb_info(ctx, band, tile, avctx);
|
|
|
|
if (result < 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
|
|
|
|
if (result < 0 || ((get_bits_count(&ctx->gb) - pos) >> 3) != tile->data_size) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
pos += tile->data_size << 3; // skip to next tile
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* restore the selected rvmap table by applying its corrections in reverse order */
|
|
|
|
for (i = band->num_corr - 1; i >= 0; i--) {
|
|
|
|
idx1 = band->corr[i * 2];
|
|
|
|
idx2 = band->corr[i * 2 + 1];
|
|
|
|
FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
|
|
|
|
FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
|
|
|
|
}
|
|
|
|
|
|
|
|
#if defined(DEBUG) && IVI4_DEBUG_CHECKSUM
|
|
|
|
if (band->checksum_present) {
|
|
|
|
uint16_t chksum = ivi_calc_band_checksum(band);
|
|
|
|
if (chksum != band->checksum) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
|
|
"Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
|
|
|
|
band->plane, band->band_num, band->checksum, chksum);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
align_get_bits(&ctx->gb);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static av_cold int decode_init(AVCodecContext *avctx)
|
|
|
|
{
|
|
|
|
IVI4DecContext *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 = PIX_FMT_YUV410P;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Rearrange decoding and reference buffers.
|
|
|
|
*
|
|
|
|
* @param[in,out] ctx pointer to the decoder context
|
|
|
|
*/
|
|
|
|
static void switch_buffers(IVI4DecContext *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_NOREF:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (ctx->frame_type) {
|
|
|
|
case FRAMETYPE_INTRA:
|
|
|
|
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 decode_frame(AVCodecContext *avctx, void *data, int *data_size,
|
|
|
|
AVPacket *avpkt)
|
|
|
|
{
|
|
|
|
IVI4DecContext *ctx = avctx->priv_data;
|
|
|
|
const uint8_t *buf = avpkt->data;
|
|
|
|
int buf_size = avpkt->size;
|
|
|
|
int result, p, b;
|
|
|
|
|
|
|
|
init_get_bits(&ctx->gb, buf, buf_size * 8);
|
|
|
|
|
|
|
|
result = decode_pic_hdr(ctx, avctx);
|
|
|
|
if (result) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Error decoding picture header\n");
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch_buffers(ctx);
|
|
|
|
|
|
|
|
if (ctx->frame_type < FRAMETYPE_NULL_FIRST) {
|
|
|
|
for (p = 0; p < 3; p++) {
|
|
|
|
for (b = 0; b < ctx->planes[p].num_bands; b++) {
|
|
|
|
result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx);
|
|
|
|
if (result) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
|
|
"Error decoding band: %d, plane: %d\n", b, p);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If the bidirectional mode is enabled, next I and the following P frame will */
|
|
|
|
/* be sent together. Unfortunately the approach below seems to be the only way */
|
|
|
|
/* to handle the B-frames mode. That's exactly the same Intel decoders do. */
|
|
|
|
if (ctx->frame_type == FRAMETYPE_INTRA) {
|
|
|
|
while (get_bits(&ctx->gb, 8)); // skip version string
|
|
|
|
skip_bits_long(&ctx->gb, 64); // skip padding, TODO: implement correct 8-bytes alignment
|
|
|
|
if (get_bits_left(&ctx->gb) > 18 && show_bits(&ctx->gb, 18) == 0x3FFF8)
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Buffer contains IP frames!\n");
|
|
|
|
}
|
|
|
|
|
2012-03-18 12:57:20 +00:00
|
|
|
if (ctx->frame_type >= FRAMETYPE_NULL_FIRST)
|
|
|
|
return buf_size;
|
|
|
|
|
2011-12-06 13:50:32 +00:00
|
|
|
if (ctx->frame.data[0])
|
|
|
|
avctx->release_buffer(avctx, &ctx->frame);
|
|
|
|
|
|
|
|
ctx->frame.reference = 0;
|
|
|
|
if ((result = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ctx->is_scalable) {
|
|
|
|
ff_ivi_recompose_haar(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4);
|
|
|
|
} else {
|
|
|
|
ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
|
|
|
|
}
|
|
|
|
|
|
|
|
ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
|
|
|
|
ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
|
|
|
|
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
*(AVFrame*)data = ctx->frame;
|
|
|
|
|
|
|
|
return buf_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static av_cold int decode_close(AVCodecContext *avctx)
|
|
|
|
{
|
|
|
|
IVI4DecContext *ctx = avctx->priv_data;
|
|
|
|
|
|
|
|
ff_ivi_free_buffers(&ctx->planes[0]);
|
|
|
|
|
|
|
|
if (ctx->frame.data[0])
|
|
|
|
avctx->release_buffer(avctx, &ctx->frame);
|
|
|
|
|
|
|
|
#if IVI4_STREAM_ANALYSER
|
|
|
|
if (ctx->is_scalable)
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "This video uses scalability mode!\n");
|
|
|
|
if (ctx->uses_tiling)
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "This video uses local decoding!\n");
|
|
|
|
if (ctx->has_b_frames)
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "This video contains B-frames!\n");
|
|
|
|
if (ctx->has_transp)
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Transparency mode is enabled!\n");
|
|
|
|
if (ctx->uses_haar)
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "This video uses Haar transform!\n");
|
|
|
|
if (ctx->uses_fullpel)
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "This video uses fullpel motion vectors!\n");
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
AVCodec ff_indeo4_decoder = {
|
|
|
|
.name = "indeo4",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
|
|
.id = CODEC_ID_INDEO4,
|
|
|
|
.priv_data_size = sizeof(IVI4DecContext),
|
|
|
|
.init = decode_init,
|
|
|
|
.close = decode_close,
|
|
|
|
.decode = decode_frame,
|
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"),
|
|
|
|
};
|