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ffmpeg/libavcodec/indeo5.c
Andreas Rheinhardt a247ac640d avcodec: Constify AVCodecs 
Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2021-04-27 10:43:15 -03:00

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/*
* 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
* Indeo Video Interactive version 5 decoder
*
* Indeo5 data is usually transported within .avi or .mov files.
* Known FOURCCs: 'IV50'
*/
#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "ivi.h"
#include "ivi_dsp.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
/**
* Decode Indeo5 GOP (Group of pictures) header.
* This header is present in key frames only.
* It defines parameters for all frames in a GOP.
*
* @param[in,out] ctx ptr to the decoder context
* @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
{
int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable;
int quant_mat, 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 AVERROR_INVALIDDATA;
}
/* 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;
is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
if (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 AVERROR_INVALIDDATA;
}
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) {
avpriv_report_missing_feature(avctx, "YV12 picture format");
return AVERROR_PATCHWELCOME;
}
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) || ctx->gop_invalid) {
result = ff_ivi_init_planes(avctx, ctx->planes, &pic_conf, 0);
if (result < 0) {
av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
return result;
}
ctx->pic_conf = pic_conf;
ctx->is_scalable = is_scalable;
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;
if (p==0 && blk_size==4) {
av_log(avctx, AV_LOG_ERROR, "4x4 luma blocks are unsupported!\n");
return AVERROR_PATCHWELCOME;
}
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)) {
avpriv_report_missing_feature(avctx, "Extended transform info");
return AVERROR_PATCHWELCOME;
}
/* 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;
band->transform_size = 8;
break;
case 1:
band->inv_transform = ff_ivi_row_slant8;
band->dc_transform = ff_ivi_dc_row_slant;
band->scan = ff_ivi_vertical_scan_8x8;
band->transform_size = 8;
break;
case 2:
band->inv_transform = ff_ivi_col_slant8;
band->dc_transform = ff_ivi_dc_col_slant;
band->scan = ff_ivi_horizontal_scan_8x8;
band->transform_size = 8;
break;
case 3:
band->inv_transform = ff_ivi_put_pixels_8x8;
band->dc_transform = ff_ivi_put_dc_pixel_8x8;
band->scan = ff_ivi_horizontal_scan_8x8;
band->transform_size = 8;
break;
case 4:
band->inv_transform = ff_ivi_inverse_slant_4x4;
band->dc_transform = ff_ivi_dc_slant_2d;
band->scan = ff_ivi_direct_scan_4x4;
band->transform_size = 4;
break;
}
band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
band->inv_transform == ff_ivi_inverse_slant_4x4;
if (band->transform_size != band->blk_size) {
av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size);
return AVERROR_INVALIDDATA;
}
/* select dequant matrix according to plane and band number */
if (!p) {
quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;
} else {
quant_mat = 5;
}
if (band->blk_size == 8) {
if(quant_mat >= 5){
av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat);
return -1;
}
band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0];
band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0];
band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];
band->inter_scale = &ivi5_scale_quant_8x8_inter[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;
}
if (get_bits(&ctx->gb, 2)) {
av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
return AVERROR_INVALIDDATA;
}
}
}
/* 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->intra_base = band1->intra_base;
band2->inter_base = band1->inter_base;
band2->intra_scale = band1->intra_scale;
band2->inter_scale = band1->inter_scale;
band2->scan = band1->scan;
band2->inv_transform = band1->inv_transform;
band2->dc_transform = band1->dc_transform;
band2->is_2d_trans = band1->is_2d_trans;
band2->transform_size= band1->transform_size;
}
/* 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 < 0) {
av_log(avctx, AV_LOG_ERROR,
"Couldn't reallocate internal structures!\n");
return result;
}
}
if (ctx->gop_flags & 8) {
if (get_bits(&ctx->gb, 3)) {
av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
return AVERROR_INVALIDDATA;
}
if (get_bits1(&ctx->gb))
skip_bits(&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;
}
/**
* Skip a header extension.
*
* @param[in,out] gb the GetBit context
*/
static inline int skip_hdr_extension(GetBitContext *gb)
{
int i, len;
do {
len = get_bits(gb, 8);
if (8*len > get_bits_left(gb))
return AVERROR_INVALIDDATA;
for (i = 0; i < len; i++) skip_bits(gb, 8);
} while(len);
return 0;
}
/**
* Decode Indeo5 picture header.
*
* @param[in,out] ctx ptr to the decoder context
* @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
{
int ret;
if (get_bits(&ctx->gb, 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);
if (ctx->frame_type >= 5) {
av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
ctx->frame_type = FRAMETYPE_INTRA;
return AVERROR_INVALIDDATA;
}
ctx->frame_num = get_bits(&ctx->gb, 8);
if (ctx->frame_type == FRAMETYPE_INTRA) {
if ((ret = decode_gop_header(ctx, avctx)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid GOP header, skipping frames.\n");
ctx->gop_invalid = 1;
return ret;
}
ctx->gop_invalid = 0;
}
if (ctx->frame_type == FRAMETYPE_INTER_SCAL && !ctx->is_scalable) {
av_log(avctx, AV_LOG_ERROR, "Scalable inter frame in non scalable stream\n");
ctx->frame_type = FRAMETYPE_INTER;
return AVERROR_INVALIDDATA;
}
if (ctx->frame_type != FRAMETYPE_NULL) {
ctx->frame_flags = get_bits(&ctx->gb, 8);
ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits(&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 */
ret = ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40,
IVI_MB_HUFF, &ctx->mb_vlc, avctx);
if (ret < 0)
return ret;
skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */
}
align_get_bits(&ctx->gb);
return 0;
}
/**
* Decode Indeo5 band header.
*
* @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_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
AVCodecContext *avctx)
{
int i, ret;
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(&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 AVERROR_INVALIDDATA;
}
/* 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 */
ret = ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF,
&band->blk_vlc, avctx);
if (ret < 0)
return ret;
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;
}
/**
* Decode info (block type, cbp, quant delta, motion vector)
* for all macroblocks in the current tile.
*
* @param[in,out] ctx ptr to the decoder context
* @param[in,out] band ptr to the band descriptor
* @param[in,out] tile ptr to the tile descriptor
* @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
IVITile *tile, AVCodecContext *avctx)
{
int x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
mv_scale, blks_per_mb, s;
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;
if (!ref_mb &&
((band->qdelta_present && band->inherit_qdelta) || band->inherit_mv))
return AVERROR_INVALIDDATA;
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\n",
tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, band->mb_size));
return AVERROR_INVALIDDATA;
}
/* scale factor for motion vectors */
mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
mv_x = mv_y = 0;
for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
mb_offset = offs;
for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
mb->xpos = x;
mb->ypos = y;
mb->buf_offs = mb_offset;
if (get_bits1(&ctx->gb)) {
if (ctx->frame_type == FRAMETYPE_INTRA) {
av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
return AVERROR_INVALIDDATA;
}
mb->type = 1; /* empty macroblocks are always INTER */
mb->cbp = 0; /* all blocks are empty */
mb->q_delta = 0;
if (!band->plane && !band->band_num && (ctx->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 && ref_mb){
/* 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 && ref_mb) {
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 && ref_mb){
/* 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;
}
}
}
s= band->is_halfpel;
if (mb->type)
if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 ||
x + ((mb->mv_x+s)>>s) + band->mb_size - 1
+ (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize - 1) {
av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y);
return AVERROR_INVALIDDATA;
}
mb++;
if (ref_mb)
ref_mb++;
mb_offset += band->mb_size;
}
offs += row_offset;
}
align_get_bits(&ctx->gb);
return 0;
}
/**
* Switch buffers.
*
* @param[in,out] ctx ptr to the decoder context
*/
static void switch_buffers(IVI45DecContext *ctx)
{
switch (ctx->prev_frame_type) {
case FRAMETYPE_INTRA:
case FRAMETYPE_INTER:
ctx->buf_switch ^= 1;
ctx->dst_buf = ctx->buf_switch;
ctx->ref_buf = ctx->buf_switch ^ 1;
break;
case FRAMETYPE_INTER_SCAL:
if (!ctx->inter_scal) {
ctx->ref2_buf = 2;
ctx->inter_scal = 1;
}
FFSWAP(int, ctx->dst_buf, ctx->ref2_buf);
ctx->ref_buf = ctx->ref2_buf;
break;
case FRAMETYPE_INTER_NOREF:
break;
}
switch (ctx->frame_type) {
case FRAMETYPE_INTRA:
ctx->buf_switch = 0;
/* FALLTHROUGH */
case FRAMETYPE_INTER:
ctx->inter_scal = 0;
ctx->dst_buf = ctx->buf_switch;
ctx->ref_buf = ctx->buf_switch ^ 1;
break;
case FRAMETYPE_INTER_SCAL:
case FRAMETYPE_INTER_NOREF:
case FRAMETYPE_NULL:
break;
}
}
static int is_nonnull_frame(IVI45DecContext *ctx)
{
return ctx->frame_type != FRAMETYPE_NULL;
}
/**
* Initialize Indeo5 decoder.
*/
static av_cold int decode_init(AVCodecContext *avctx)
{
IVI45DecContext *ctx = avctx->priv_data;
int result;
ctx->gop_invalid = 1;
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(avctx, ctx->planes, &ctx->pic_conf, 0);
if (result) {
av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
return AVERROR_INVALIDDATA;
}
ctx->buf_switch = 0;
ctx->inter_scal = 0;
ctx->decode_pic_hdr = decode_pic_hdr;
ctx->decode_band_hdr = decode_band_hdr;
ctx->decode_mb_info = decode_mb_info;
ctx->switch_buffers = switch_buffers;
ctx->is_nonnull_frame = is_nonnull_frame;
ctx->is_indeo4 = 0;
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
return 0;
}
const AVCodec ff_indeo5_decoder = {
.name = "indeo5",
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_INDEO5,
.priv_data_size = sizeof(IVI45DecContext),
.init = decode_init,
.close = ff_ivi_decode_close,
.decode = ff_ivi_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};
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