Index: patched-ffmpeg-mt/libavcodec/indeo5.c |
=================================================================== |
--- patched-ffmpeg-mt/libavcodec/indeo5.c (revision 0) |
+++ patched-ffmpeg-mt/libavcodec/indeo5.c (revision 0) |
@@ -0,0 +1,839 @@ |
+/* |
+ * Indeo Video Interactive v5 compatible decoder |
+ * Copyright (c) 2009 Maxim Poliakovski |
+ * |
+ * 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 libavcodec/indeo5.c |
+ * Indeo Video Interactive version 5 decoder |
+ * |
+ * Indeo5 data is usually transported within .avi or .mov files. |
+ * Known FOURCCs: 'IV50' |
+ */ |
+ |
+#define ALT_BITSTREAM_READER_LE |
+#include "avcodec.h" |
+#include "get_bits.h" |
+#include "dsputil.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 |
+ |
+#define IVI5_IS_PROTECTED 0x20 |
+ |
+typedef struct { |
+ GetBitContext gb; |
+ AVFrame frame; |
+ RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables |
+ IVIPlaneDesc planes[3]; ///< color planes |
+ const uint8_t *frame_data; ///< input frame data pointer |
+ int buf_switch; ///< used to switch between three buffers |
+ int dst_buf; |
+ int ref_buf; |
+ uint32_t frame_size; ///< frame size in bytes |
+ int frame_type; |
+ int prev_frame_type; ///< frame type of the previous frame |
+ int frame_num; |
+ uint32_t pic_hdr_size; ///< picture header size in bytes |
+ uint8_t frame_flags; |
+ uint16_t checksum; ///< frame checksum |
+ |
+ IVIHuffTab mb_vlc; ///< vlc table for decoding macroblock data |
+ |
+ uint16_t gop_hdr_size; |
+ uint8_t gop_flags; |
+ int is_scalable; |
+ uint32_t lock_word; |
+ IVIPicConfig pic_conf; |
+} IVI5DecContext; |
+ |
+ |
+/** |
+ * Decodes Indeo5 GOP (Group of pictures) header. |
+ * This header is present in key frames only. |
+ * It defines parameters for all frames in a GOP. |
+ * |
+ * @param ctx [in,out] ptr to the decoder context |
+ * @param avctx [in] ptr to the AVCodecContext |
+ * @return result code: 0 = OK, -1 = error |
+ */ |
+static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx) |
+{ |
+ int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, 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 -1; |
+ } |
+ |
+ /* 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 -1; |
+ } |
+ |
+ 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) { |
+ av_log(avctx, AV_LOG_ERROR, "YV12 picture format not supported!\n"); |
+ return -1; |
+ } |
+ |
+ 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)) { |
+ result = ff_ivi_init_planes(ctx->planes, &pic_conf); |
+ if (result) { |
+ av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n"); |
+ return -1; |
+ } |
+ 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)) { |
+ av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n"); |
+ return -1; |
+ } |
+ |
+ /* 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; |
+ break; |
+ |
+ case 1: |
+ band->inv_transform = ff_ivi_row_slant8; |
+ band->dc_transform = ff_ivi_dc_row_slant; |
+ band->scan = ivi5_scans8x8[0]; |
+ break; |
+ |
+ case 2: |
+ band->inv_transform = ff_ivi_col_slant8; |
+ band->dc_transform = ff_ivi_dc_col_slant; |
+ band->scan = ivi5_scans8x8[1]; |
+ break; |
+ |
+ case 3: |
+ band->inv_transform = ff_ivi_put_pixels_8x8; |
+ band->dc_transform = ff_ivi_put_dc_pixel_8x8; |
+ band->scan = ivi5_scans8x8[1]; |
+ break; |
+ |
+ case 4: |
+ band->inv_transform = ff_ivi_inverse_slant_4x4; |
+ band->dc_transform = ff_ivi_dc_slant_2d; |
+ band->scan = ivi5_scan4x4; |
+ break; |
+ } |
+ |
+ band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 || |
+ band->inv_transform == ff_ivi_inverse_slant_4x4; |
+ |
+ /* select dequant matrix according to plane and band number */ |
+ if (!p) { |
+ band->quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0; |
+ } else { |
+ band->quant_mat = 5; |
+ } |
+ |
+ if (get_bits(&ctx->gb, 2)) { |
+ av_log(avctx, AV_LOG_ERROR, "End marker missing!\n"); |
+ return -1; |
+ } |
+ } |
+ } |
+ |
+ /* 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->quant_mat = band1->quant_mat; |
+ 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) { |
+ av_log(avctx, AV_LOG_ERROR, |
+ "Couldn't reallocate internal structures!\n"); |
+ return -1; |
+ } |
+ } |
+ |
+ if (ctx->gop_flags & 8) { |
+ if (get_bits(&ctx->gb, 3)) { |
+ av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n"); |
+ return -1; |
+ } |
+ |
+ 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; |
+} |
+ |
+ |
+/** |
+ * Skips a header extension. |
+ * |
+ * @param gb [in,out] 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); |
+} |
+ |
+ |
+/** |
+ * Decodes Indeo5 picture header. |
+ * |
+ * @param ctx [in,out] ptr to the decoder context |
+ * @param avctx [in] ptr to the AVCodecContext |
+ * @return result code: 0 = OK, -1 = error |
+ */ |
+static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx) |
+{ |
+ if (get_bits(&ctx->gb, 5) != 0x1F) { |
+ av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n"); |
+ return -1; |
+ } |
+ |
+ 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 -1; |
+ } |
+ |
+ ctx->frame_num = get_bits(&ctx->gb, 8); |
+ |
+ if (ctx->frame_type == FRAMETYPE_INTRA) { |
+ if (decode_gop_header(ctx, avctx)) |
+ return -1; |
+ } |
+ |
+ 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 */ |
+ if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx)) |
+ return -1; |
+ |
+ skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */ |
+ } |
+ |
+ align_get_bits(&ctx->gb); |
+ |
+ return 0; |
+} |
+ |
+ |
+/** |
+ * Decodes Indeo5 band header. |
+ * |
+ * @param ctx [in,out] ptr to the decoder context |
+ * @param band [in,out] ptr to the band descriptor |
+ * @param avctx [in] ptr to the AVCodecContext |
+ * @return result code: 0 = OK, -1 = error |
+ */ |
+static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band, |
+ AVCodecContext *avctx) |
+{ |
+ int i; |
+ 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 -1; |
+ } |
+ |
+ /* 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 */ |
+ if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx)) |
+ return -1; |
+ |
+ 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; |
+} |
+ |
+ |
+/** |
+ * Decodes info (block type, cbp, quant delta, motion vector) |
+ * for all macroblocks in the current tile. |
+ * |
+ * @param ctx [in,out] ptr to the decoder context |
+ * @param band [in,out] ptr to the band descriptor |
+ * @param tile [in,out] ptr to the tile descriptor |
+ * @param avctx [in] ptr to the AVCodecContext |
+ * @return result code: 0 = OK, -1 = error |
+ */ |
+static int decode_mb_info(IVI5DecContext *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; |
+ |
+ /* 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 -1; |
+ } |
+ 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; |
+} |
+ |
+ |
+/** |
+ * Decodes an Indeo5 band. |
+ * |
+ * @param ctx [in,out] ptr to the decoder context |
+ * @param band [in,out] ptr to the band descriptor |
+ * @param avctx [in] ptr to the AVCodecContext |
+ * @return result code: 0 = OK, -1 = error |
+ */ |
+static int decode_band(IVI5DecContext *ctx, int plane_num, |
+ IVIBandDesc *band, AVCodecContext *avctx) |
+{ |
+ int result, i, t, idx1, idx2, pos; |
+ IVITile *tile; |
+ |
+ band->buf = band->bufs[ctx->dst_buf]; |
+ band->ref_buf = band->bufs[ctx->ref_buf]; |
+ band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3); |
+ |
+ result = decode_band_hdr(ctx, band, avctx); |
+ if (result) { |
+ av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n", |
+ result); |
+ return -1; |
+ } |
+ |
+ if (band->is_empty) { |
+ av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n"); |
+ return -1; |
+ } |
+ |
+ if (band->blk_size == 8) { |
+ band->intra_base = &ivi5_base_quant_8x8_intra[band->quant_mat][0]; |
+ band->inter_base = &ivi5_base_quant_8x8_inter[band->quant_mat][0]; |
+ band->intra_scale = &ivi5_scale_quant_8x8_intra[band->quant_mat][0]; |
+ band->inter_scale = &ivi5_scale_quant_8x8_inter[band->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; |
+ } |
+ |
+ 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)); |
+ } else { |
+ tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb); |
+ |
+ 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 IVI_DEBUG |
+ 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 result; |
+} |
+ |
+ |
+/** |
+ * Switches buffers. |
+ * |
+ * @param ctx [in,out] ptr to the decoder context |
+ * @param avctx [in] ptr to the AVCodecContext |
+ */ |
+static void switch_buffers(IVI5DecContext *ctx, AVCodecContext *avctx) |
+{ |
+ switch (ctx->frame_type) { |
+ case FRAMETYPE_INTRA: |
+ ctx->buf_switch = 0; |
+ ctx->dst_buf = 0; |
+ ctx->ref_buf = 0; |
+ break; |
+ case FRAMETYPE_INTER: |
+ ctx->buf_switch &= 1; |
+ /* swap buffers only if there were no droppable frames */ |
+ if (ctx->prev_frame_type != FRAMETYPE_INTER_NOREF && |
+ ctx->prev_frame_type != FRAMETYPE_INTER_SCAL) |
+ ctx->buf_switch ^= 1; |
+ ctx->dst_buf = ctx->buf_switch; |
+ ctx->ref_buf = ctx->buf_switch ^ 1; |
+ break; |
+ case FRAMETYPE_INTER_SCAL: |
+ if (ctx->prev_frame_type == FRAMETYPE_INTER_NOREF) |
+ break; |
+ if (ctx->prev_frame_type != FRAMETYPE_INTER_SCAL) { |
+ ctx->buf_switch ^= 1; |
+ ctx->dst_buf = ctx->buf_switch; |
+ ctx->ref_buf = ctx->buf_switch ^ 1; |
+ } else { |
+ ctx->buf_switch ^= 2; |
+ ctx->dst_buf = 2; |
+ ctx->ref_buf = ctx->buf_switch & 1; |
+ if (!(ctx->buf_switch & 2)) |
+ FFSWAP(int, ctx->dst_buf, ctx->ref_buf); |
+ } |
+ break; |
+ case FRAMETYPE_INTER_NOREF: |
+ if (ctx->prev_frame_type == FRAMETYPE_INTER_SCAL) { |
+ ctx->buf_switch ^= 2; |
+ ctx->dst_buf = 2; |
+ ctx->ref_buf = ctx->buf_switch & 1; |
+ if (!(ctx->buf_switch & 2)) |
+ FFSWAP(int, ctx->dst_buf, ctx->ref_buf); |
+ } else { |
+ ctx->buf_switch ^= 1; |
+ ctx->dst_buf = ctx->buf_switch & 1; |
+ ctx->ref_buf = (ctx->buf_switch & 1) ^ 1; |
+ } |
+ break; |
+ case FRAMETYPE_NULL: |
+ return; |
+ default: |
+ av_log(avctx, AV_LOG_ERROR, "unsupported frame type: %d\n", ctx->frame_type); |
+ } |
+} |
+ |
+ |
+/** |
+ * Initializes Indeo5 decoder. |
+ */ |
+static av_cold int decode_init(AVCodecContext *avctx) |
+{ |
+ IVI5DecContext *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 -1; |
+ } |
+ |
+ avctx->pix_fmt = PIX_FMT_YUV410P; |
+ |
+ return 0; |
+} |
+ |
+ |
+/** |
+ * main decoder function |
+ */ |
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, |
+ AVPacket *avpkt) |
+{ |
+ IVI5DecContext *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); |
+ ctx->frame_data = buf; |
+ ctx->frame_size = buf_size; |
+ |
+ result = decode_pic_hdr(ctx, avctx); |
+ if (result) { |
+ av_log(avctx, AV_LOG_ERROR, |
+ "Error while decoding picture header: %d\n", result); |
+ return -1; |
+ } |
+ |
+ if (ctx->gop_flags & IVI5_IS_PROTECTED) { |
+ av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n"); |
+ return -1; |
+ } |
+ |
+ switch_buffers(ctx, avctx); |
+ |
+ //START_TIMER; |
+ |
+ if (ctx->frame_type == FRAMETYPE_NULL) { |
+ ctx->frame_type = ctx->prev_frame_type; |
+ } else { |
+ 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 while decoding band: %d, plane: %d\n", b, p); |
+ return -1; |
+ } |
+ } |
+ } |
+ } |
+ |
+ //STOP_TIMER("decode_planes"); |
+ |
+ if (ctx->frame.data[0]) |
+ avctx->release_buffer(avctx, &ctx->frame); |
+ |
+ ctx->frame.reference = 0; |
+ if (avctx->get_buffer(avctx, &ctx->frame) < 0) { |
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
+ return -1; |
+ } |
+ |
+ if (ctx->is_scalable) { |
+ ff_ivi_recompose53 (&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; |
+} |
+ |
+ |
+/** |
+ * Closes Indeo5 decoder and cleans up its context. |
+ */ |
+static av_cold int decode_close(AVCodecContext *avctx) |
+{ |
+ IVI5DecContext *ctx = avctx->priv_data; |
+ |
+ ff_ivi_free_buffers(&ctx->planes[0]); |
+ |
+ if (ctx->mb_vlc.cust_tab.table) |
+ free_vlc(&ctx->mb_vlc.cust_tab); |
+ |
+ if (ctx->frame.data[0]) |
+ avctx->release_buffer(avctx, &ctx->frame); |
+ |
+ return 0; |
+} |
+ |
+ |
+AVCodec indeo5_decoder = { |
+ .name = "indeo5", |
+ .type = CODEC_TYPE_VIDEO, |
+ .id = CODEC_ID_INDEO5, |
+ .priv_data_size = sizeof(IVI5DecContext), |
+ .init = decode_init, |
+ .close = decode_close, |
+ .decode = decode_frame, |
+ .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"), |
+}; |