#define BITSTREAM_READER_LE
#include "avcodec.h"
-#include "get_bits.h"
+#include "bitstream.h"
#include "internal.h"
#include "mathops.h"
#include "ivi.h"
memcmp(desc1->xbits, desc2->xbits, desc1->num_rows);
}
-int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
+int ff_ivi_dec_huff_desc(BitstreamContext *bc, int desc_coded, int which_tab,
IVIHuffTab *huff_tab, AVCodecContext *avctx)
{
int i, result;
return 0;
}
- huff_tab->tab_sel = get_bits(gb, 3);
+ huff_tab->tab_sel = bitstream_read(bc, 3);
if (huff_tab->tab_sel == 7) {
/* custom huffman table (explicitly encoded) */
- new_huff.num_rows = get_bits(gb, 4);
+ new_huff.num_rows = bitstream_read(bc, 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);
+ new_huff.xbits[i] = bitstream_read(bc, 4);
/* Have we got the same custom table? Rebuild if not. */
if (ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc)) {
* 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
+ * @param[in,out] bc the Bitstream context
* @return size of the tile data in bytes
*/
-static int ivi_dec_tile_data_size(GetBitContext *gb)
+static int ivi_dec_tile_data_size(BitstreamContext *bc)
{
int len;
len = 0;
- if (get_bits1(gb)) {
- len = get_bits(gb, 8);
+ if (bitstream_read_bit(bc)) {
+ len = bitstream_read(bc, 8);
if (len == 255)
- len = get_bits_long(gb, 24);
+ len = bitstream_read(bc, 24);
}
/* align the bitstream reader on the byte boundary */
- align_get_bits(gb);
+ bitstream_align(bc);
return len;
}
return 0;
}
-static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band,
+static int ivi_decode_coded_blocks(BitstreamContext *bc, IVIBandDesc *band,
ivi_mc_func mc, ivi_mc_avg_func mc_avg,
int mv_x, int mv_y,
int mv_x2, int mv_y2,
/* zero column flags */
memset(col_flags, 0, sizeof(col_flags));
while (scan_pos <= num_coeffs) {
- sym = get_vlc2(gb, band->blk_vlc.tab->table,
- IVI_VLC_BITS, 1);
+ sym = bitstream_read_vlc(bc, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);
if (sym == rvmap->eob_sym)
break; /* End of block */
/* Escape - run/val explicitly coded using 3 vlc codes */
if (sym == rvmap->esc_sym) {
- run = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1) + 1;
- lo = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);
- hi = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);
+ run = bitstream_read_vlc(bc, band->blk_vlc.tab->table, IVI_VLC_BITS, 1) + 1;
+ lo = bitstream_read_vlc(bc, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);
+ hi = bitstream_read_vlc(bc, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);
/* merge them and convert into signed val */
val = IVI_TOSIGNED((hi << 6) | lo);
} else {
* dequantize them, apply inverse transform and motion compensation
* in order to reconstruct the picture.
*
- * @param[in,out] gb the GetBit context
+ * @param[in,out] bc the Bitstream 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,
+static int ivi_decode_blocks(BitstreamContext *bc, IVIBandDesc *band,
IVITile *tile, AVCodecContext *avctx)
{
int mbn, blk, num_blocks, blk_size, ret, is_intra;
}
if (cbp & 1) { /* block coded ? */
- ret = ivi_decode_coded_blocks(gb, band, mc_with_delta_func,
+ ret = ivi_decode_coded_blocks(bc, band, mc_with_delta_func,
mc_avg_with_delta_func,
mv_x, mv_y, mv_x2, mv_y2,
&prev_dc, is_intra,
}// for blk
}// for mbn
- align_get_bits(gb);
+ bitstream_align(bc);
return 0;
}
band->ref_buf = band->bufs[ctx->ref_buf];
band->b_ref_buf = 0;
}
- band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
+ band->data_ptr = ctx->frame_data + (bitstream_tell(&ctx->bc) >> 3);
result = ctx->decode_band_hdr(ctx, band, avctx);
if (result) {
FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
}
- pos = get_bits_count(&ctx->gb);
+ pos = bitstream_tell(&ctx->bc);
for (t = 0; t < band->num_tiles; t++) {
tile = &band->tiles[t];
band->mb_size, tile->mb_size);
return AVERROR_INVALIDDATA;
}
- tile->is_empty = get_bits1(&ctx->gb);
+ tile->is_empty = bitstream_read_bit(&ctx->bc);
if (tile->is_empty) {
result = ivi_process_empty_tile(avctx, band, tile,
(ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
break;
ff_dlog(avctx, "Empty tile encountered!\n");
} else {
- tile->data_size = ivi_dec_tile_data_size(&ctx->gb);
+ tile->data_size = ivi_dec_tile_data_size(&ctx->bc);
if (!tile->data_size) {
av_log(avctx, AV_LOG_ERROR, "Tile data size is zero!\n");
return AVERROR_INVALIDDATA;
if (result < 0)
break;
- result = ivi_decode_blocks(&ctx->gb, band, tile, avctx);
+ result = ivi_decode_blocks(&ctx->bc, band, tile, avctx);
if (result < 0) {
av_log(avctx, AV_LOG_ERROR,
"Corrupted tile data encountered!\n");
break;
}
- if (((get_bits_count(&ctx->gb) - pos) >> 3) != tile->data_size) {
+ if (((bitstream_tell(&ctx->bc) - pos) >> 3) != tile->data_size) {
av_log(avctx, AV_LOG_ERROR,
"Tile data_size mismatch!\n");
result = AVERROR_INVALIDDATA;
}
#endif
- align_get_bits(&ctx->gb);
+ bitstream_align(&ctx->bc);
return result;
}
int buf_size = avpkt->size;
int result, p, b;
- init_get_bits(&ctx->gb, buf, buf_size * 8);
+ bitstream_init8(&ctx->bc, buf, buf_size);
ctx->frame_data = buf;
ctx->frame_size = buf_size;
if (ctx->is_indeo4 && ctx->frame_type == IVI4_FRAMETYPE_INTRA) {
int left;
- while (get_bits(&ctx->gb, 8)); // skip version string
- left = get_bits_count(&ctx->gb) & 0x18;
- skip_bits_long(&ctx->gb, 64 - left);
- if (get_bits_left(&ctx->gb) > 18 &&
- show_bits_long(&ctx->gb, 21) == 0xBFFF8) { // syncheader + inter type
+ while (bitstream_read(&ctx->bc, 8)); // skip version string
+ left = bitstream_tell(&ctx->bc) & 0x18;
+ bitstream_skip(&ctx->bc, 64 - left);
+ if (bitstream_bits_left(&ctx->bc) > 18 &&
+ bitstream_peek(&ctx->bc, 21) == 0xBFFF8) { // syncheader + inter type
AVPacket pkt;
- pkt.data = avpkt->data + (get_bits_count(&ctx->gb) >> 3);
- pkt.size = get_bits_left(&ctx->gb) >> 3;
+ pkt.data = avpkt->data + (bitstream_tell(&ctx->bc) >> 3);
+ pkt.size = bitstream_bits_left(&ctx->bc) >> 3;
ff_ivi_decode_frame(avctx, ctx->p_frame, &ctx->got_p_frame, &pkt);
}
}
projects / ffmpeg / blobdiff