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indeo: Convert to the new bitstream reader

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This commit is contained in:
Alexandra Hájková 2016-04-18 10:49:08 +02:00 committed by Diego Biurrun
parent f5b7bd2a7c
commit c3defda0d8
6 changed files with 206 additions and 196 deletions
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16
libavcodec/indeo2.c
View File

@ -28,7 +28,7 @@
#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "get_bits.h"
#include "bitstream.h"
#include "indeo2data.h"
#include "internal.h"
#include "mathops.h"
@ -36,7 +36,7 @@
typedef struct Ir2Context{
AVCodecContext *avctx;
AVFrame *picture;
GetBitContext gb;
BitstreamContext bc;
int decode_delta;
} Ir2Context;
@ -44,9 +44,9 @@ typedef struct Ir2Context{
static VLC ir2_vlc;
/* Indeo 2 codes are in range 0x01..0x7F and 0x81..0x90 */
static inline int ir2_get_code(GetBitContext *gb)
static inline int ir2_get_code(BitstreamContext *bc)
{
return get_vlc2(gb, ir2_vlc.table, CODE_VLC_BITS, 1) + 1;
return bitstream_read_vlc(bc, ir2_vlc.table, CODE_VLC_BITS, 1) + 1;
}
static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst,
@ -63,7 +63,7 @@ static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst
/* first line contain absolute values, other lines contain deltas */
while (out < width) {
c = ir2_get_code(&ctx->gb);
c = ir2_get_code(&ctx->bc);
if (c >= 0x80) { /* we have a run */
c -= 0x7F;
if (out + c*2 > width)
@ -80,7 +80,7 @@ static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst
for (j = 1; j < height; j++) {
out = 0;
while (out < width) {
c = ir2_get_code(&ctx->gb);
c = ir2_get_code(&ctx->bc);
if (c >= 0x80) { /* we have a skip */
c -= 0x7F;
if (out + c*2 > width)
@ -119,7 +119,7 @@ static int ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_
for (j = 0; j < height; j++) {
out = 0;
while (out < width) {
c = ir2_get_code(&ctx->gb);
c = ir2_get_code(&ctx->bc);
if (c >= 0x80) { /* we have a skip */
c -= 0x7F;
out += c * 2;
@ -171,7 +171,7 @@ static int ir2_decode_frame(AVCodecContext *avctx,
buf[i] = ff_reverse[buf[i]];
#endif
init_get_bits(&s->gb, buf + start, (buf_size - start) * 8);
bitstream_init(&s->bc, buf + start, (buf_size - start) * 8);
ltab = buf[0x22] & 3;
ctab = buf[0x22] >> 2;

19
libavcodec/indeo3.c
View File

@ -31,9 +31,10 @@
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bitstream.h"
#include "bytestream.h"
#include "get_bits.h"
#include "hpeldsp.h"
#include "internal.h"
@ -83,7 +84,7 @@ typedef struct Indeo3DecodeContext {
AVCodecContext *avctx;
HpelDSPContext hdsp;
GetBitContext gb;
BitstreamContext bc;
int need_resync;
int skip_bits;
const uint8_t *next_cell_data;
@ -725,8 +726,8 @@ enum {
ctx->need_resync = 1
#define RESYNC_BITSTREAM \
if (ctx->need_resync && !(get_bits_count(&ctx->gb) & 7)) { \
skip_bits_long(&ctx->gb, ctx->skip_bits); \
if (ctx->need_resync && !(bitstream_tell(&ctx->bc) & 7)) { \
bitstream_skip(&ctx->bc, ctx->skip_bits); \
ctx->skip_bits = 0; \
ctx->need_resync = 0; \
}
@ -773,7 +774,7 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
while (1) { /* loop until return */
RESYNC_BITSTREAM;
switch (code = get_bits(&ctx->gb, 2)) {
switch (code = bitstream_read(&ctx->bc, 2)) {
case H_SPLIT:
case V_SPLIT:
if (parse_bintree(ctx, avctx, plane, code, &curr_cell, depth - 1, strip_width))
@ -785,7 +786,7 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
curr_cell.tree = 1; /* enter the VQ tree */
} else { /* VQ tree NULL code */
RESYNC_BITSTREAM;
code = get_bits(&ctx->gb, 2);
code = bitstream_read(&ctx->bc, 2);
if (code >= 2) {
av_log(avctx, AV_LOG_ERROR, "Invalid VQ_NULL code: %d\n", code);
return AVERROR_INVALIDDATA;
@ -805,7 +806,7 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
unsigned mv_idx;
/* get motion vector index and setup the pointer to the mv set */
if (!ctx->need_resync)
ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
ctx->next_cell_data = &ctx->bc.buffer[(bitstream_tell(&ctx->bc) + 7) >> 3];
mv_idx = *(ctx->next_cell_data++);
if (mv_idx >= ctx->num_vectors) {
av_log(avctx, AV_LOG_ERROR, "motion vector index out of range\n");
@ -816,7 +817,7 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
UPDATE_BITPOS(8);
} else { /* VQ tree DATA code */
if (!ctx->need_resync)
ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
ctx->next_cell_data = &ctx->bc.buffer[(bitstream_tell(&ctx->bc) + 7) >> 3];
CHECK_CELL
bytes_used = decode_cell(ctx, avctx, plane, &curr_cell,
@ -856,7 +857,7 @@ static int decode_plane(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
ctx->mc_vectors = num_vectors ? data : 0;
/* init the bitreader */
init_get_bits(&ctx->gb, &data[num_vectors * 2], (data_size - num_vectors * 2) << 3);
bitstream_init(&ctx->bc, &data[num_vectors * 2], (data_size - num_vectors * 2) << 3);
ctx->skip_bits = 0;
ctx->need_resync = 0;

158
libavcodec/indeo4.c
View File

@ -29,7 +29,7 @@
#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "get_bits.h"
#include "bitstream.h"
#include "indeo4data.h"
#include "internal.h"
#include "ivi.h"
@ -70,19 +70,19 @@ static const struct {
* - 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3
* Anything else is either unsupported or corrupt.
*
* @param[in,out] gb the GetBit context
* @param[in,out] bc the Bitstream context
* @return number of wavelet bands or 0 on error
*/
static int decode_plane_subdivision(GetBitContext *gb)
static int decode_plane_subdivision(BitstreamContext *bc)
{
int i;
switch (get_bits(gb, 2)) {
switch (bitstream_read(bc, 2)) {
case 3:
return 1;
case 2:
for (i = 0; i < 4; i++)
if (get_bits(gb, 2) != 3)
if (bitstream_read(bc, 2) != 3)
return 0;
return 4;
default:
@ -107,13 +107,13 @@ static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
int pic_size_indx, i, p;
IVIPicConfig pic_conf;
if (get_bits(&ctx->gb, 18) != 0x3FFF8) {
if (bitstream_read(&ctx->bc, 18) != 0x3FFF8) {
av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
return AVERROR_INVALIDDATA;
}
ctx->prev_frame_type = ctx->frame_type;
ctx->frame_type = get_bits(&ctx->gb, 3);
ctx->frame_type = bitstream_read(&ctx->bc, 3);
if (ctx->frame_type == 7) {
av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type);
return AVERROR_INVALIDDATA;
@ -122,15 +122,15 @@ static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
if (ctx->frame_type == IVI4_FRAMETYPE_BIDIR)
ctx->has_b_frames = 1;
ctx->has_transp = get_bits1(&ctx->gb);
ctx->has_transp = bitstream_read_bit(&ctx->bc);
/* unknown bit: Mac decoder ignores this bit, XANIM returns error */
if (get_bits1(&ctx->gb)) {
if (bitstream_read_bit(&ctx->bc)) {
av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n");
return AVERROR_INVALIDDATA;
}
ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0;
ctx->data_size = bitstream_read_bit(&ctx->bc) ? bitstream_read(&ctx->bc, 24) : 0;
/* null frames don't contain anything else so we just return */
if (ctx->frame_type >= IVI4_FRAMETYPE_NULL_FIRST) {
@ -141,32 +141,32 @@ static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
/* Check key lock status. If enabled - ignore lock word. */
/* Usually we have to prompt the user for the password, but */
/* we don't do that because Indeo 4 videos can be decoded anyway */
if (get_bits1(&ctx->gb)) {
skip_bits_long(&ctx->gb, 32);
if (bitstream_read_bit(&ctx->bc)) {
bitstream_skip(&ctx->bc, 32);
ff_dlog(avctx, "Password-protected clip!\n");
}
pic_size_indx = get_bits(&ctx->gb, 3);
pic_size_indx = bitstream_read(&ctx->bc, 3);
if (pic_size_indx == IVI4_PIC_SIZE_ESC) {
pic_conf.pic_height = get_bits(&ctx->gb, 16);
pic_conf.pic_width = get_bits(&ctx->gb, 16);
pic_conf.pic_height = bitstream_read(&ctx->bc, 16);
pic_conf.pic_width = bitstream_read(&ctx->bc, 16);
} else {
pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1];
pic_conf.pic_width = ivi4_common_pic_sizes[pic_size_indx * 2 ];
}
/* Decode tile dimensions. */
ctx->uses_tiling = get_bits1(&ctx->gb);
ctx->uses_tiling = bitstream_read_bit(&ctx->bc);
if (ctx->uses_tiling) {
pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4));
pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, get_bits(&ctx->gb, 4));
pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, bitstream_read(&ctx->bc, 4));
pic_conf.tile_width = scale_tile_size(pic_conf.pic_width, bitstream_read(&ctx->bc, 4));
} else {
pic_conf.tile_height = pic_conf.pic_height;
pic_conf.tile_width = pic_conf.pic_width;
}
/* Decode chroma subsampling. We support only 4:4 aka YVU9. */
if (get_bits(&ctx->gb, 2)) {
if (bitstream_read(&ctx->bc, 2)) {
av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n");
return AVERROR_INVALIDDATA;
}
@ -174,9 +174,9 @@ static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2;
/* decode subdivision of the planes */
pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb);
pic_conf.luma_bands = decode_plane_subdivision(&ctx->bc);
if (pic_conf.luma_bands)
pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb);
pic_conf.chroma_bands = decode_plane_subdivision(&ctx->bc);
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",
@ -210,40 +210,40 @@ static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
}
}
ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0;
ctx->frame_num = bitstream_read_bit(&ctx->bc) ? bitstream_read(&ctx->bc, 20) : 0;
/* skip decTimeEst field if present */
if (get_bits1(&ctx->gb))
skip_bits(&ctx->gb, 8);
if (bitstream_read_bit(&ctx->bc))
bitstream_skip(&ctx->bc, 8);
/* decode macroblock and block huffman codebooks */
if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF, &ctx->mb_vlc, avctx) ||
ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx))
if (ff_ivi_dec_huff_desc(&ctx->bc, bitstream_read_bit(&ctx->bc), IVI_MB_HUFF, &ctx->mb_vlc, avctx) ||
ff_ivi_dec_huff_desc(&ctx->bc, bitstream_read_bit(&ctx->bc), IVI_BLK_HUFF, &ctx->blk_vlc, avctx))
return AVERROR_INVALIDDATA;
ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8;
ctx->rvmap_sel = bitstream_read_bit(&ctx->bc) ? bitstream_read(&ctx->bc, 3) : 8;
ctx->in_imf = get_bits1(&ctx->gb);
ctx->in_q = get_bits1(&ctx->gb);
ctx->in_imf = bitstream_read_bit(&ctx->bc);
ctx->in_q = bitstream_read_bit(&ctx->bc);
ctx->pic_glob_quant = get_bits(&ctx->gb, 5);
ctx->pic_glob_quant = bitstream_read(&ctx->bc, 5);
/* TODO: ignore this parameter if unused */
ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0;
ctx->unknown1 = bitstream_read_bit(&ctx->bc) ? bitstream_read(&ctx->bc, 3) : 0;
ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0;
ctx->checksum = bitstream_read_bit(&ctx->bc) ? bitstream_read(&ctx->bc, 16) : 0;
/* skip picture header extension if any */
while (get_bits1(&ctx->gb)) {
while (bitstream_read_bit(&ctx->bc)) {
ff_dlog(avctx, "Pic hdr extension encountered!\n");
skip_bits(&ctx->gb, 8);
bitstream_skip(&ctx->bc, 8);
}
if (get_bits1(&ctx->gb)) {
if (bitstream_read_bit(&ctx->bc)) {
av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n");
}
align_get_bits(&ctx->gb);
bitstream_align(&ctx->bc);
return 0;
}
@ -263,22 +263,22 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
int plane, band_num, indx, transform_id, scan_indx;
int i;
plane = get_bits(&ctx->gb, 2);
band_num = get_bits(&ctx->gb, 4);
plane = bitstream_read(&ctx->bc, 2);
band_num = bitstream_read(&ctx->bc, 4);
if (band->plane != plane || band->band_num != band_num) {
av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n");
return AVERROR_INVALIDDATA;
}
band->is_empty = get_bits1(&ctx->gb);
band->is_empty = bitstream_read_bit(&ctx->bc);
if (!band->is_empty) {
int old_blk_size = band->blk_size;
/* skip header size
* If header size is not given, header size is 4 bytes. */
if (get_bits1(&ctx->gb))
skip_bits(&ctx->gb, 16);
if (bitstream_read_bit(&ctx->bc))
bitstream_skip(&ctx->bc, 16);
band->is_halfpel = get_bits(&ctx->gb, 2);
band->is_halfpel = bitstream_read(&ctx->bc, 2);
if (band->is_halfpel >= 2) {
av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n",
band->is_halfpel);
@ -287,11 +287,11 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
if (!band->is_halfpel)
ctx->uses_fullpel = 1;
band->checksum_present = get_bits1(&ctx->gb);
band->checksum_present = bitstream_read_bit(&ctx->bc);
if (band->checksum_present)
band->checksum = get_bits(&ctx->gb, 16);
band->checksum = bitstream_read(&ctx->bc, 16);
indx = get_bits(&ctx->gb, 2);
indx = bitstream_read(&ctx->bc, 2);
if (indx == 3) {
av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n");
return AVERROR_INVALIDDATA;
@ -299,13 +299,13 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
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->inherit_mv = bitstream_read_bit(&ctx->bc);
band->inherit_qdelta = bitstream_read_bit(&ctx->bc);
band->glob_quant = get_bits(&ctx->gb, 5);
band->glob_quant = bitstream_read(&ctx->bc, 5);
if (!get_bits1(&ctx->gb) || ctx->frame_type == IVI4_FRAMETYPE_INTRA) {
transform_id = get_bits(&ctx->gb, 5);
if (!bitstream_read_bit(&ctx->bc) || ctx->frame_type == IVI4_FRAMETYPE_INTRA) {
transform_id = bitstream_read(&ctx->bc, 5);
if (transform_id >= FF_ARRAY_ELEMS(transforms) ||
!transforms[transform_id].inv_trans) {
avpriv_request_sample(avctx, "Transform %d", transform_id);
@ -331,7 +331,7 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
if (band->blk_size != band->transform_size)
return AVERROR_INVALIDDATA;
scan_indx = get_bits(&ctx->gb, 4);
scan_indx = bitstream_read(&ctx->bc, 4);
if (scan_indx == 15) {
av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n");
return AVERROR_INVALIDDATA;
@ -344,7 +344,7 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
band->scan = scan_index_to_tab[scan_indx];
band->quant_mat = get_bits(&ctx->gb, 5);
band->quant_mat = bitstream_read(&ctx->bc, 5);
if (band->quant_mat >= FF_ARRAY_ELEMS(quant_index_to_tab)) {
if (band->quant_mat == 31)
@ -370,20 +370,20 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
}
/* decode block huffman codebook */
if (!get_bits1(&ctx->gb))
if (!bitstream_read_bit(&ctx->bc))
band->blk_vlc.tab = ctx->blk_vlc.tab;
else
if (ff_ivi_dec_huff_desc(&ctx->gb, 1, IVI_BLK_HUFF,
if (ff_ivi_dec_huff_desc(&ctx->bc, 1, 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;
band->rvmap_sel = bitstream_read_bit(&ctx->bc) ? bitstream_read(&ctx->bc, 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 (bitstream_read_bit(&ctx->bc)) {
band->num_corr = bitstream_read(&ctx->bc, 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);
@ -392,7 +392,7 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
/* read correction pairs */
for (i = 0; i < band->num_corr * 2; i++)
band->corr[i] = get_bits(&ctx->gb, 8);
band->corr[i] = bitstream_read(&ctx->bc, 8);
}
}
@ -408,7 +408,7 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
band->intra_scale = NULL;
band->inter_scale = NULL;
align_get_bits(&ctx->gb);
bitstream_align(&ctx->bc);
return 0;
}
@ -453,7 +453,7 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
mb->b_mv_x =
mb->b_mv_y = 0;
if (get_bits1(&ctx->gb)) {
if (bitstream_read_bit(&ctx->bc)) {
if (ctx->frame_type == IVI4_FRAMETYPE_INTRA) {
av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
return AVERROR_INVALIDDATA;
@ -463,8 +463,9 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
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 = bitstream_read_vlc(&ctx->bc,
ctx->mb_vlc.tab->table,
IVI_VLC_BITS, 1);
mb->q_delta = IVI_TOSIGNED(mb->q_delta);
}
@ -489,18 +490,19 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
ctx->frame_type == IVI4_FRAMETYPE_INTRA1) {
mb->type = 0; /* mb_type is always INTRA for intra-frames */
} else {
mb->type = get_bits(&ctx->gb, mb_type_bits);
mb->type = bitstream_read(&ctx->bc, mb_type_bits);
}
mb->cbp = get_bits(&ctx->gb, blks_per_mb);
mb->cbp = bitstream_read(&ctx->bc, 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 = bitstream_read_vlc(&ctx->bc,
ctx->mb_vlc.tab->table,
IVI_VLC_BITS, 1);
mb->q_delta = IVI_TOSIGNED(mb->q_delta);
}
@ -519,22 +521,24 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
}
} else {
/* decode motion vector deltas */
mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
IVI_VLC_BITS, 1);
mv_delta = bitstream_read_vlc(&ctx->bc,
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_delta = bitstream_read_vlc(&ctx->bc,
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;
if (mb->type == 3) {
mv_delta = get_vlc2(&ctx->gb,
ctx->mb_vlc.tab->table,
IVI_VLC_BITS, 1);
mv_delta = bitstream_read_vlc(&ctx->bc,
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_delta = bitstream_read_vlc(&ctx->bc,
ctx->mb_vlc.tab->table,
IVI_VLC_BITS, 1);
mv_x += IVI_TOSIGNED(mv_delta);
mb->b_mv_x = -mv_x;
mb->b_mv_y = -mv_y;
@ -558,7 +562,7 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
offs += row_offset;
}
align_get_bits(&ctx->gb);
bitstream_align(&ctx->bc);
return 0;
}

127
libavcodec/indeo5.c
View File

@ -29,7 +29,7 @@
#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "get_bits.h"
#include "bitstream.h"
#include "ivi.h"
#include "ivi_dsp.h"
#include "indeo5data.h"
@ -63,14 +63,14 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
IVIBandDesc *band, *band1, *band2;
IVIPicConfig pic_conf;
ctx->gop_flags = get_bits(&ctx->gb, 8);
ctx->gop_flags = bitstream_read(&ctx->bc, 8);
ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0;
ctx->gop_hdr_size = (ctx->gop_flags & 1) ? bitstream_read(&ctx->bc, 16) : 0;
if (ctx->gop_flags & IVI5_IS_PROTECTED)
ctx->lock_word = get_bits_long(&ctx->gb, 32);
ctx->lock_word = bitstream_read(&ctx->bc, 32);
tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0;
tile_size = (ctx->gop_flags & 0x40) ? 64 << bitstream_read(&ctx->bc, 2) : 0;
if (tile_size > 256) {
av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size);
return AVERROR_INVALIDDATA;
@ -78,8 +78,8 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
/* 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;
pic_conf.luma_bands = bitstream_read(&ctx->bc, 2) * 3 + 1;
pic_conf.chroma_bands = bitstream_read_bit(&ctx->bc) * 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",
@ -87,10 +87,10 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
return AVERROR_INVALIDDATA;
}
pic_size_indx = get_bits(&ctx->gb, 4);
pic_size_indx = bitstream_read(&ctx->bc, 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);
pic_conf.pic_height = bitstream_read(&ctx->bc, 13);
pic_conf.pic_width = bitstream_read(&ctx->bc, 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;
@ -126,10 +126,10 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
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);
band->is_halfpel = bitstream_read_bit(&ctx->bc);
mb_size = get_bits1(&ctx->gb);
blk_size = 8 >> get_bits1(&ctx->gb);
mb_size = bitstream_read_bit(&ctx->bc);
blk_size = 8 >> bitstream_read_bit(&ctx->bc);
mb_size = blk_size << !mb_size;
blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size;
@ -138,7 +138,7 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
band->blk_size = blk_size;
}
if (get_bits1(&ctx->gb)) {
if (bitstream_read_bit(&ctx->bc)) {
avpriv_report_missing_feature(avctx, "Extended transform info");
return AVERROR_PATCHWELCOME;
}
@ -206,7 +206,7 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
band->inter_scale = ivi5_scale_quant_4x4_inter;
}
if (get_bits(&ctx->gb, 2)) {
if (bitstream_read(&ctx->bc, 2)) {
av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
return AVERROR_INVALIDDATA;
}
@ -245,27 +245,27 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
}
if (ctx->gop_flags & 8) {
if (get_bits(&ctx->gb, 3)) {
if (bitstream_read(&ctx->bc, 3)) {
av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
return AVERROR_INVALIDDATA;
}
if (get_bits1(&ctx->gb))
skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */
if (bitstream_read_bit(&ctx->bc))
bitstream_skip(&ctx->bc, 24); /* skip transparency fill color */
}
align_get_bits(&ctx->gb);
bitstream_align(&ctx->bc);
skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */
bitstream_skip(&ctx->bc, 23); /* FIXME: unknown meaning */
/* skip GOP extension if any */
if (get_bits1(&ctx->gb)) {
if (bitstream_read_bit(&ctx->bc)) {
do {
i = get_bits(&ctx->gb, 16);
i = bitstream_read(&ctx->bc, 16);
} while (i & 0x8000);
}
align_get_bits(&ctx->gb);
bitstream_align(&ctx->bc);
return 0;
}
@ -274,15 +274,16 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
/**
* Skip a header extension.
*
* @param[in,out] gb the GetBit context
* @param[in,out] bc the Bitstream context
*/
static inline void skip_hdr_extension(GetBitContext *gb)
static inline void skip_hdr_extension(BitstreamContext *bc)
{
int i, len;
do {
len = get_bits(gb, 8);
for (i = 0; i < len; i++) skip_bits(gb, 8);
len = bitstream_read(bc, 8);
for (i = 0; i < len; i++)
bitstream_skip(bc, 8);
} while(len);
}
@ -298,19 +299,19 @@ static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
{
int ret;
if (get_bits(&ctx->gb, 5) != 0x1F) {
if (bitstream_read(&ctx->bc, 5) != 0x1F) {
av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
return AVERROR_INVALIDDATA;
}
ctx->prev_frame_type = ctx->frame_type;
ctx->frame_type = get_bits(&ctx->gb, 3);
ctx->frame_type = bitstream_read(&ctx->bc, 3);
if (ctx->frame_type >= 5) {
av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
return AVERROR_INVALIDDATA;
}
ctx->frame_num = get_bits(&ctx->gb, 8);
ctx->frame_num = bitstream_read(&ctx->bc, 8);
if (ctx->frame_type == FRAMETYPE_INTRA) {
if ((ret = decode_gop_header(ctx, avctx)) < 0) {
@ -322,26 +323,26 @@ static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
}
if (ctx->frame_type != FRAMETYPE_NULL) {
ctx->frame_flags = get_bits(&ctx->gb, 8);
ctx->frame_flags = bitstream_read(&ctx->bc, 8);
ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0;
ctx->pic_hdr_size = (ctx->frame_flags & 1) ? bitstream_read(&ctx->bc, 24) : 0;
ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0;
ctx->checksum = (ctx->frame_flags & 0x10) ? bitstream_read(&ctx->bc, 16) : 0;
/* skip unknown extension if any */
if (ctx->frame_flags & 0x20)
skip_hdr_extension(&ctx->gb); /* XXX: untested */
skip_hdr_extension(&ctx->bc); /* XXX: untested */
/* decode macroblock huffman codebook */
ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40,
ret = ff_ivi_dec_huff_desc(&ctx->bc, ctx->frame_flags & 0x40,
IVI_MB_HUFF, &ctx->mb_vlc, avctx);
if (ret < 0)
return ret;
skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
bitstream_skip(&ctx->bc, 3); /* FIXME: unknown meaning! */
}
align_get_bits(&ctx->gb);
bitstream_align(&ctx->bc);
return 0;
}
@ -361,14 +362,14 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
int i, ret;
uint8_t band_flags;
band_flags = get_bits(&ctx->gb, 8);
band_flags = bitstream_read(&ctx->bc, 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->data_size = (ctx->frame_flags & 0x80) ? bitstream_read(&ctx->bc, 24) : 0;
band->inherit_mv = band_flags & 2;
band->inherit_qdelta = band_flags & 8;
@ -378,7 +379,7 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
/* 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 */
band->num_corr = bitstream_read(&ctx->bc, 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);
@ -387,31 +388,31 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
/* read correction pairs */
for (i = 0; i < band->num_corr * 2; i++)
band->corr[i] = get_bits(&ctx->gb, 8);
band->corr[i] = bitstream_read(&ctx->bc, 8);
}
/* select appropriate rvmap table for this band */
band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8;
band->rvmap_sel = (band_flags & 0x40) ? bitstream_read(&ctx->bc, 3) : 8;
/* decode block huffman codebook */
ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF,
ret = ff_ivi_dec_huff_desc(&ctx->bc, band_flags & 0x80, IVI_BLK_HUFF,
&band->blk_vlc, avctx);
if (ret < 0)
return ret;
band->checksum_present = get_bits1(&ctx->gb);
band->checksum_present = bitstream_read_bit(&ctx->bc);
if (band->checksum_present)
band->checksum = get_bits(&ctx->gb, 16);
band->checksum = bitstream_read(&ctx->bc, 16);
band->glob_quant = get_bits(&ctx->gb, 5);
band->glob_quant = bitstream_read(&ctx->bc, 5);
/* skip unknown extension if any */
if (band_flags & 0x20) { /* XXX: untested */
align_get_bits(&ctx->gb);
skip_hdr_extension(&ctx->gb);
bitstream_align(&ctx->bc);
skip_hdr_extension(&ctx->bc);
}
align_get_bits(&ctx->gb);
bitstream_align(&ctx->bc);
return 0;
}
@ -461,7 +462,7 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
mb->ypos = y;
mb->buf_offs = mb_offset;
if (get_bits1(&ctx->gb)) {
if (bitstream_read_bit(&ctx->bc)) {
if (ctx->frame_type == FRAMETYPE_INTRA) {
av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
return AVERROR_INVALIDDATA;
@ -471,8 +472,9 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
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 = bitstream_read_vlc(&ctx->bc,
ctx->mb_vlc.tab->table,
IVI_VLC_BITS, 1);
mb->q_delta = IVI_TOSIGNED(mb->q_delta);
}
@ -493,11 +495,11 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
} 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);
mb->type = bitstream_read_bit(&ctx->bc);
}
blks_per_mb = band->mb_size != band->blk_size ? 4 : 1;
mb->cbp = get_bits(&ctx->gb, blks_per_mb);
mb->cbp = bitstream_read(&ctx->bc, blks_per_mb);
mb->q_delta = 0;
if (band->qdelta_present) {
@ -505,8 +507,9 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
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 = bitstream_read_vlc(&ctx->bc,
ctx->mb_vlc.tab->table,
IVI_VLC_BITS, 1);
mb->q_delta = IVI_TOSIGNED(mb->q_delta);
}
}
@ -525,11 +528,13 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
}
} else {
/* decode motion vector deltas */
mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
IVI_VLC_BITS, 1);
mv_delta = bitstream_read_vlc(&ctx->bc,
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_delta = bitstream_read_vlc(&ctx->bc,
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;
@ -546,7 +551,7 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
offs += row_offset;
}
align_get_bits(&ctx->gb);
bitstream_align(&ctx->bc);
return 0;
}

71
libavcodec/ivi.c
View File

@ -33,7 +33,7 @@
#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "get_bits.h"
#include "bitstream.h"
#include "internal.h"
#include "mathops.h"
#include "ivi.h"
@ -225,7 +225,7 @@ static int ivi_huff_desc_cmp(const IVIHuffDesc *desc1,
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;
@ -238,17 +238,17 @@ int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
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)) {
@ -461,22 +461,22 @@ av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes,
* 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;
}
@ -500,7 +500,7 @@ static int ivi_dc_transform(IVIBandDesc *band, int *prev_dc, int buf_offs,
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,
@ -536,16 +536,15 @@ static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band,
/* 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 {
@ -601,12 +600,12 @@ static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band,
* 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;
@ -710,7 +709,7 @@ static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band,
}
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,
@ -739,7 +738,7 @@ static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band,
}// for blk
}// for mbn
align_get_bits(gb);
bitstream_align(bc);
return 0;
}
@ -925,7 +924,7 @@ static int decode_band(IVI45DecContext *ctx,
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) {
@ -949,7 +948,7 @@ static int decode_band(IVI45DecContext *ctx,
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];
@ -959,7 +958,7 @@ static int decode_band(IVI45DecContext *ctx,
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));
@ -967,7 +966,7 @@ static int decode_band(IVI45DecContext *ctx,
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;
@ -977,14 +976,14 @@ static int decode_band(IVI45DecContext *ctx,
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;
@ -1016,7 +1015,7 @@ static int decode_band(IVI45DecContext *ctx,
}
#endif
align_get_bits(&ctx->gb);
bitstream_align(&ctx->bc);
return result;
}
@ -1030,7 +1029,7 @@ int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
int buf_size = avpkt->size;
int result, p, b;
init_get_bits(&ctx->gb, buf, buf_size * 8);
bitstream_init(&ctx->bc, buf, buf_size * 8);
ctx->frame_data = buf;
ctx->frame_size = buf_size;
@ -1122,14 +1121,14 @@ int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
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);
}
}

11
libavcodec/ivi.h
View File

@ -29,10 +29,11 @@
#ifndef AVCODEC_IVI_H
#define AVCODEC_IVI_H
#include "avcodec.h"
#include "get_bits.h"
#include <stdint.h>
#include "avcodec.h"
#include "bitstream.h"
/**
* Indeo 4 frame types.
*/
@ -210,7 +211,7 @@ typedef struct IVIPicConfig {
} IVIPicConfig;
typedef struct IVI45DecContext {
GetBitContext gb;
BitstreamContext bc;
RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables
uint32_t frame_num;
@ -302,14 +303,14 @@ void ff_ivi_init_static_vlc(void);
* Decode a huffman codebook descriptor from the bitstream
* and select specified huffman table.
*
* @param[in,out] gb the GetBit context
* @param[in,out] bc the Bitstream context
* @param[in] desc_coded flag signalling if table descriptor was coded
* @param[in] which_tab codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF)
* @param[out] huff_tab pointer to the descriptor of the selected table
* @param[in] avctx AVCodecContext pointer
* @return zero on success, negative value otherwise
*/
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);
/**