*
* Copyright (c) 2009 Maxim Poliakovski
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
* Indeo5 decoders.
*/
-#define ALT_BITSTREAM_READER_LE
+#define BITSTREAM_READER_LE
+#include "libavutil/attributes.h"
#include "avcodec.h"
#include "get_bits.h"
+#include "internal.h"
+#include "mathops.h"
#include "ivi_common.h"
-#include "libavutil/common.h"
#include "ivi_dsp.h"
extern const IVIHuffDesc ff_ivi_mb_huff_desc[8]; ///< static macroblock huffman tables
extern const IVIHuffDesc ff_ivi_blk_huff_desc[8]; ///< static block huffman tables
-VLC ff_ivi_mb_vlc_tabs [8];
-VLC ff_ivi_blk_vlc_tabs[8];
+static VLC ivi_mb_vlc_tabs [8]; ///< static macroblock Huffman tables
+static VLC ivi_blk_vlc_tabs[8]; ///< static block Huffman tables
/**
- * Reverses "nbits" bits of the value "val" and returns the result
+ * Reverse "nbits" bits of the value "val" and return the result
* in the least significant bits.
*/
static uint16_t inv_bits(uint16_t val, int nbits)
uint16_t res;
if (nbits <= 8) {
- res = av_reverse[val] >> (8-nbits);
+ res = ff_reverse[val] >> (8-nbits);
} else
- res = ((av_reverse[val & 0xFF] << 8) + (av_reverse[val >> 8])) >> (16-nbits);
+ res = ((ff_reverse[val & 0xFF] << 8) + (ff_reverse[val >> 8])) >> (16-nbits);
return res;
}
-int ff_ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag)
+/*
+ * Generate a huffman codebook from the given descriptor
+ * and convert it into the Libav VLC table.
+ *
+ * @param[in] cb pointer to codebook descriptor
+ * @param[out] vlc where to place the generated VLC table
+ * @param[in] flag flag: 1 - for static or 0 for dynamic tables
+ * @return result code: 0 - OK, -1 = error (invalid codebook descriptor)
+ */
+static int ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag)
{
int pos, i, j, codes_per_row, prefix, not_last_row;
uint16_t codewords[256]; /* FIXME: move this temporal storage out? */
if (initialized_vlcs)
return;
for (i = 0; i < 8; i++) {
- ff_ivi_mb_vlc_tabs[i].table = table_data + i * 2 * 8192;
- ff_ivi_mb_vlc_tabs[i].table_allocated = 8192;
- ff_ivi_create_huff_from_desc(&ff_ivi_mb_huff_desc[i], &ff_ivi_mb_vlc_tabs[i], 1);
- ff_ivi_blk_vlc_tabs[i].table = table_data + (i * 2 + 1) * 8192;
- ff_ivi_blk_vlc_tabs[i].table_allocated = 8192;
- ff_ivi_create_huff_from_desc(&ff_ivi_blk_huff_desc[i], &ff_ivi_blk_vlc_tabs[i], 1);
+ ivi_mb_vlc_tabs[i].table = table_data + i * 2 * 8192;
+ ivi_mb_vlc_tabs[i].table_allocated = 8192;
+ ivi_create_huff_from_desc(&ff_ivi_mb_huff_desc[i], &ivi_mb_vlc_tabs[i], 1);
+ ivi_blk_vlc_tabs[i].table = table_data + (i * 2 + 1) * 8192;
+ ivi_blk_vlc_tabs[i].table_allocated = 8192;
+ ivi_create_huff_from_desc(&ff_ivi_blk_huff_desc[i], &ivi_blk_vlc_tabs[i], 1);
}
initialized_vlcs = 1;
}
+/*
+ * Copy huffman codebook descriptors.
+ *
+ * @param[out] dst ptr to the destination descriptor
+ * @param[in] src ptr to the source descriptor
+ */
+static void ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src)
+{
+ dst->num_rows = src->num_rows;
+ memcpy(dst->xbits, src->xbits, src->num_rows);
+}
+
+/*
+ * Compare two huffman codebook descriptors.
+ *
+ * @param[in] desc1 ptr to the 1st descriptor to compare
+ * @param[in] desc2 ptr to the 2nd descriptor to compare
+ * @return comparison result: 0 - equal, 1 - not equal
+ */
+static int ivi_huff_desc_cmp(const IVIHuffDesc *desc1, const IVIHuffDesc *desc2)
+{
+ return desc1->num_rows != desc2->num_rows
+ || memcmp(desc1->xbits, desc2->xbits, desc1->num_rows);
+}
+
int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
IVIHuffTab *huff_tab, AVCodecContext *avctx)
{
if (!desc_coded) {
/* select default table */
- huff_tab->tab = (which_tab) ? &ff_ivi_blk_vlc_tabs[7]
- : &ff_ivi_mb_vlc_tabs [7];
+ huff_tab->tab = (which_tab) ? &ivi_blk_vlc_tabs[7]
+ : &ivi_mb_vlc_tabs [7];
} else {
huff_tab->tab_sel = get_bits(gb, 3);
if (huff_tab->tab_sel == 7) {
/* custom huffman table (explicitly encoded) */
new_huff.num_rows = get_bits(gb, 4);
+ if (!new_huff.num_rows) {
+ av_log(avctx, AV_LOG_ERROR, "Empty custom Huffman table!\n");
+ return AVERROR_INVALIDDATA;
+ }
for (i = 0; i < new_huff.num_rows; i++)
new_huff.xbits[i] = get_bits(gb, 4);
/* Have we got the same custom table? Rebuild if not. */
- if (ff_ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc)) {
- ff_ivi_huff_desc_copy(&huff_tab->cust_desc, &new_huff);
+ if (ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc)) {
+ ivi_huff_desc_copy(&huff_tab->cust_desc, &new_huff);
if (huff_tab->cust_tab.table)
- free_vlc(&huff_tab->cust_tab);
- result = ff_ivi_create_huff_from_desc(&huff_tab->cust_desc,
+ ff_free_vlc(&huff_tab->cust_tab);
+ result = ivi_create_huff_from_desc(&huff_tab->cust_desc,
&huff_tab->cust_tab, 0);
if (result) {
+ huff_tab->cust_desc.num_rows = 0; // reset faulty description
av_log(avctx, AV_LOG_ERROR,
"Error while initializing custom vlc table!\n");
- return -1;
+ return result;
}
}
huff_tab->tab = &huff_tab->cust_tab;
} else {
/* select one of predefined tables */
- huff_tab->tab = (which_tab) ? &ff_ivi_blk_vlc_tabs[huff_tab->tab_sel]
- : &ff_ivi_mb_vlc_tabs [huff_tab->tab_sel];
+ huff_tab->tab = (which_tab) ? &ivi_blk_vlc_tabs[huff_tab->tab_sel]
+ : &ivi_mb_vlc_tabs [huff_tab->tab_sel];
}
}
return 0;
}
-int ff_ivi_huff_desc_cmp(const IVIHuffDesc *desc1, const IVIHuffDesc *desc2)
+/*
+ * Free planes, bands and macroblocks buffers.
+ *
+ * @param[in] planes pointer to the array of the plane descriptors
+ */
+static av_cold void ivi_free_buffers(IVIPlaneDesc *planes)
{
- return desc1->num_rows != desc2->num_rows
- || memcmp(desc1->xbits, desc2->xbits, desc1->num_rows);
-}
+ int p, b, t;
-void ff_ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src)
-{
- dst->num_rows = src->num_rows;
- memcpy(dst->xbits, src->xbits, src->num_rows);
+ for (p = 0; p < 3; p++) {
+ for (b = 0; b < planes[p].num_bands; b++) {
+ av_freep(&planes[p].bands[b].bufs[0]);
+ av_freep(&planes[p].bands[b].bufs[1]);
+ av_freep(&planes[p].bands[b].bufs[2]);
+
+ if (planes[p].bands[b].blk_vlc.cust_tab.table)
+ ff_free_vlc(&planes[p].bands[b].blk_vlc.cust_tab);
+ for (t = 0; t < planes[p].bands[b].num_tiles; t++)
+ av_freep(&planes[p].bands[b].tiles[t].mbs);
+ av_freep(&planes[p].bands[b].tiles);
+ }
+ av_freep(&planes[p].bands);
+ }
}
-int av_cold ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg)
+av_cold int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg)
{
int p, b;
uint32_t b_width, b_height, align_fac, width_aligned, height_aligned, buf_size;
IVIBandDesc *band;
- ff_ivi_free_buffers(planes);
+ ivi_free_buffers(planes);
/* fill in the descriptor of the luminance plane */
planes[0].width = cfg->pic_width;
band->width = b_width;
band->height = b_height;
band->pitch = width_aligned;
- band->bufs[0] = av_malloc(buf_size);
- band->bufs[1] = av_malloc(buf_size);
+ band->aheight = height_aligned;
+ band->bufs[0] = av_mallocz(buf_size);
+ band->bufs[1] = av_mallocz(buf_size);
if (!band->bufs[0] || !band->bufs[1])
return AVERROR(ENOMEM);
/* allocate the 3rd band buffer for scalability mode */
if (cfg->luma_bands > 1) {
- band->bufs[2] = av_malloc(buf_size);
+ band->bufs[2] = av_mallocz(buf_size);
if (!band->bufs[2])
return AVERROR(ENOMEM);
}
return 0;
}
-void av_cold ff_ivi_free_buffers(IVIPlaneDesc *planes)
-{
- int p, b, t;
-
- for (p = 0; p < 3; p++) {
- for (b = 0; b < planes[p].num_bands; b++) {
- av_freep(&planes[p].bands[b].bufs[0]);
- av_freep(&planes[p].bands[b].bufs[1]);
- av_freep(&planes[p].bands[b].bufs[2]);
-
- if (planes[p].bands[b].blk_vlc.cust_tab.table)
- free_vlc(&planes[p].bands[b].blk_vlc.cust_tab);
- for (t = 0; t < planes[p].bands[b].num_tiles; t++)
- av_freep(&planes[p].bands[b].tiles[t].mbs);
- av_freep(&planes[p].bands[b].tiles);
- }
- av_freep(&planes[p].bands);
- }
-}
-
-int av_cold ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height)
+av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height)
{
int p, b, x, y, x_tiles, y_tiles, t_width, t_height;
IVIBandDesc *band;
for (x = 0; x < band->width; x += t_width) {
tile->xpos = x;
tile->ypos = y;
+ tile->mb_size = band->mb_size;
tile->width = FFMIN(band->width - x, t_width);
tile->height = FFMIN(band->height - y, t_height);
tile->is_empty = tile->data_size = 0;
return 0;
}
-int ff_ivi_dec_tile_data_size(GetBitContext *gb)
+/*
+ * Decode size of the tile data.
+ * The size is stored as a variable-length field having the following format:
+ * if (tile_data_size < 255) than this field is only one byte long
+ * if (tile_data_size >= 255) than this field four is byte long: 0xFF X1 X2 X3
+ * where X1-X3 is size of the tile data
+ *
+ * @param[in,out] gb the GetBit context
+ * @return size of the tile data in bytes
+ */
+static int ivi_dec_tile_data_size(GetBitContext *gb)
{
int len;
return len;
}
-int ff_ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile)
+/*
+ * Decode block data:
+ * extract huffman-coded transform coefficients from the bitstream,
+ * dequantize them, apply inverse transform and motion compensation
+ * in order to reconstruct the picture.
+ *
+ * @param[in,out] gb the GetBit context
+ * @param[in] band pointer to the band descriptor
+ * @param[in] tile pointer to the tile descriptor
+ * @return result code: 0 - OK, -1 = error (corrupted blocks data)
+ */
+static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile,
+ AVCodecContext *avctx)
{
int mbn, blk, num_blocks, num_coeffs, blk_size, scan_pos, run, val,
- pos, is_intra, mc_type, mv_x, mv_y, col_mask;
+ pos, is_intra, mc_type = 0, mv_x, mv_y, col_mask;
uint8_t col_flags[8];
int32_t prev_dc, trvec[64];
uint32_t cbp, sym, lo, hi, quant, buf_offs, q;
if (!is_intra) {
mv_x = mb->mv_x;
mv_y = mb->mv_y;
- if (!band->is_halfpel) {
- mc_type = 0; /* we have only fullpel vectors */
- } else {
+ if (band->is_halfpel) {
mc_type = ((mv_y & 1) << 1) | (mv_x & 1);
mv_x >>= 1;
mv_y >>= 1; /* convert halfpel vectors into fullpel ones */
}
+ if (mb->type) {
+ int dmv_x, dmv_y, cx, cy;
+
+ dmv_x = mb->mv_x >> band->is_halfpel;
+ dmv_y = mb->mv_y >> band->is_halfpel;
+ cx = mb->mv_x & band->is_halfpel;
+ cy = mb->mv_y & band->is_halfpel;
+
+ if ( mb->xpos + dmv_x < 0
+ || mb->xpos + dmv_x + band->mb_size + cx > band->pitch
+ || mb->ypos + dmv_y < 0
+ || mb->ypos + dmv_y + band->mb_size + cy > band->aheight) {
+ return AVERROR_INVALIDDATA;
+ }
+ }
}
for (blk = 0; blk < num_blocks; blk++) {
}
if (cbp & 1) { /* block coded ? */
+ if (!band->scan) {
+ av_log(avctx, AV_LOG_ERROR, "Scan pattern is not set.\n");
+ return AVERROR_INVALIDDATA;
+ }
+
scan_pos = -1;
memset(trvec, 0, num_coeffs*sizeof(trvec[0])); /* zero transform vector */
memset(col_flags, 0, sizeof(col_flags)); /* zero column flags */
hi = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);
val = IVI_TOSIGNED((hi << 6) | lo); /* merge them and convert into signed val */
} else {
+ if (sym >= 256U) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid sym encountered: %d.\n", sym);
+ return -1;
+ }
run = rvmap->runtab[sym];
val = rvmap->valtab[sym];
}
break;
pos = band->scan[scan_pos];
- if (IVI_DEBUG && !val)
- av_log(NULL, AV_LOG_ERROR, "Val = 0 encountered!\n");
+ if (!val)
+ av_dlog(avctx, "Val = 0 encountered!\n");
q = (base_tab[pos] * quant) >> 9;
if (q > 1)
/* block not coded */
/* for intra blocks apply the dc slant transform */
/* for inter - perform the motion compensation without delta */
- if (is_intra && band->dc_transform) {
- band->dc_transform(&prev_dc, band->buf + buf_offs,
- band->pitch, blk_size);
+ if (is_intra) {
+ if (band->dc_transform)
+ band->dc_transform(&prev_dc, band->buf + buf_offs,
+ band->pitch, blk_size);
} else
mc_no_delta_func(band->buf + buf_offs,
band->ref_buf + buf_offs + mv_y * band->pitch + mv_x,
return 0;
}
-void ff_ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band,
- IVITile *tile, int32_t mv_scale)
+/**
+ * Handle empty tiles by performing data copying and motion
+ * compensation respectively.
+ *
+ * @param[in] avctx ptr to the AVCodecContext
+ * @param[in] band pointer to the band descriptor
+ * @param[in] tile pointer to the tile descriptor
+ * @param[in] mv_scale scaling factor for motion vectors
+ */
+static int ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band,
+ IVITile *tile, int32_t mv_scale)
{
int x, y, need_mc, mbn, blk, num_blocks, mv_x, mv_y, mc_type;
int offs, mb_offset, row_offset;
void (*mc_no_delta_func)(int16_t *buf, const int16_t *ref_buf, uint32_t pitch,
int mc_type);
+ 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 in ivi_process_empty_tile()\n",
+ tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size));
+ return AVERROR_INVALIDDATA;
+ }
+
offs = tile->ypos * band->pitch + tile->xpos;
mb = tile->mbs;
ref_mb = tile->ref_mbs;
dst += band->pitch;
}
}
+
+ return 0;
}
-#if IVI_DEBUG
-uint16_t ivi_calc_band_checksum (IVIBandDesc *band)
+#ifdef DEBUG
+static uint16_t ivi_calc_band_checksum(IVIBandDesc *band)
{
int x, y;
int16_t *src, checksum;
return checksum;
}
-
-int ivi_check_band (IVIBandDesc *band, const uint8_t *ref, int pitch)
-{
- int x, y, result;
- uint8_t t1, t2;
- int16_t *src;
-
- src = band->buf;
- result = 0;
-
- for (y = 0; y < band->height; src += band->pitch, y++) {
- for (x = 0; x < band->width; x++) {
- t1 = av_clip(src[x] + 128, 0, 255);
- t2 = ref[x];
- if (t1 != t2) {
- av_log(NULL, AV_LOG_ERROR, "Data mismatch: row %d, column %d\n",
- y / band->blk_size, x / band->blk_size);
- result = -1;
- }
- }
- ref += pitch;
- }
-
- return result;
-}
#endif
-void ff_ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch)
+/*
+ * Convert and output the current plane.
+ * This conversion is done by adding back the bias value of 128
+ * (subtracted in the encoder) and clipping the result.
+ *
+ * @param[in] plane pointer to the descriptor of the plane being processed
+ * @param[out] dst pointer to the buffer receiving converted pixels
+ * @param[in] dst_pitch pitch for moving to the next y line
+ */
+static void ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch)
{
int x, y;
const int16_t *src = plane->bands[0].buf;
uint32_t pitch = plane->bands[0].pitch;
+ if (!src)
+ return;
+
for (y = 0; y < plane->height; y++) {
for (x = 0; x < plane->width; x++)
dst[x] = av_clip_uint8(src[x] + 128);
}
}
+/**
+ * Decode an Indeo 4 or 5 band.
+ *
+ * @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(IVI45DecContext *ctx,
+ IVIBandDesc *band, AVCodecContext *avctx)
+{
+ int result, i, t, idx1, idx2, pos;
+ IVITile *tile;
+
+ band->buf = band->bufs[ctx->dst_buf];
+ if (!band->buf) {
+ av_log(avctx, AV_LOG_ERROR, "Band buffer points to no data!\n");
+ return AVERROR_INVALIDDATA;
+ }
+ band->ref_buf = band->bufs[ctx->ref_buf];
+ band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
+
+ result = ctx->decode_band_hdr(ctx, band, avctx);
+ if (result) {
+ av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
+ result);
+ 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];
+
+ if (tile->mb_size != band->mb_size) {
+ av_log(avctx, AV_LOG_ERROR, "MB sizes mismatch: %d vs. %d\n",
+ band->mb_size, tile->mb_size);
+ return AVERROR_INVALIDDATA;
+ }
+ tile->is_empty = get_bits1(&ctx->gb);
+ if (tile->is_empty) {
+ result = ivi_process_empty_tile(avctx, band, tile,
+ (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
+ if (result < 0)
+ break;
+ av_dlog(avctx, "Empty tile encountered!\n");
+ } else {
+ tile->data_size = 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 = ctx->decode_mb_info(ctx, band, tile, avctx);
+ if (result < 0)
+ break;
+
+ result = ivi_decode_blocks(&ctx->gb, band, tile, avctx);
+ 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]);
+ }
+
+#ifdef 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;
+}
+
+int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+ AVPacket *avpkt)
+{
+ IVI45DecContext *ctx = avctx->priv_data;
+ const uint8_t *buf = avpkt->data;
+ AVFrame *frame = 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 = ctx->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_invalid)
+ return AVERROR_INVALIDDATA;
+
+ if (ctx->gop_flags & IVI5_IS_PROTECTED) {
+ av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
+ return -1;
+ }
+
+ ctx->switch_buffers(ctx);
+
+ //{ START_TIMER;
+
+ if (ctx->is_nonnull_frame(ctx)) {
+ for (p = 0; p < 3; p++) {
+ for (b = 0; b < ctx->planes[p].num_bands; b++) {
+ result = decode_band(ctx, &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 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 (avctx->codec_id == AV_CODEC_ID_INDEO4 && ctx->frame_type == 0/*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");
+ }
+
+ avcodec_set_dimensions(avctx, ctx->planes[0].width, ctx->planes[0].height);
+ if ((result = ff_get_buffer(avctx, frame, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return result;
+ }
+
+ if (ctx->is_scalable) {
+ if (avctx->codec_id == AV_CODEC_ID_INDEO4)
+ ff_ivi_recompose_haar(&ctx->planes[0], frame->data[0], frame->linesize[0]);
+ else
+ ff_ivi_recompose53 (&ctx->planes[0], frame->data[0], frame->linesize[0]);
+ } else {
+ ivi_output_plane(&ctx->planes[0], frame->data[0], frame->linesize[0]);
+ }
+
+ ivi_output_plane(&ctx->planes[2], frame->data[1], frame->linesize[1]);
+ ivi_output_plane(&ctx->planes[1], frame->data[2], frame->linesize[2]);
+
+ *got_frame = 1;
+
+ return buf_size;
+}
+
+/**
+ * Close Indeo5 decoder and clean up its context.
+ */
+av_cold int ff_ivi_decode_close(AVCodecContext *avctx)
+{
+ IVI45DecContext *ctx = avctx->priv_data;
+
+ ivi_free_buffers(&ctx->planes[0]);
+
+ if (ctx->mb_vlc.cust_tab.table)
+ ff_free_vlc(&ctx->mb_vlc.cust_tab);
+
+#if IVI4_STREAM_ANALYSER
+ if (avctx->codec_id == AV_CODEC_ID_INDEO4) {
+ 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;
+}
+
/**
* These are 2x8 predefined Huffman codebooks for coding macroblock/block
projects / ffmpeg / blobdiff