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factor out common decoding code for Indeo 4 and Indeo 5

tags/n0.11
Kostya Shishkov 13 years ago
parent
b37d945dd4
commit
aa372cf470
4 changed files with 317 additions and 465 deletions
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  1. +26
    -245
      libavcodec/indeo4.c
  2. +21
    -220
      libavcodec/indeo5.c
  3. +210
    -0
      libavcodec/ivi_common.c
  4. +60
    -0
      libavcodec/ivi_common.h

+ 26
- 245
libavcodec/indeo4.c View File

@@ -35,9 +35,6 @@
#include "ivi_common.h"
#include "indeo4data.h"

#define IVI4_STREAM_ANALYSER 0
#define IVI4_DEBUG_CHECKSUM 0

/**
* Indeo 4 frame types.
*/
@@ -54,46 +51,6 @@ enum {
#define IVI4_PIC_SIZE_ESC 7


typedef struct {
GetBitContext gb;
AVFrame frame;
RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables

uint32_t frame_num;
int frame_type;
int prev_frame_type; ///< frame type of the previous frame
uint32_t data_size; ///< size of the frame data in bytes from picture header
int is_scalable;
int transp_status; ///< transparency mode status: 1 - enabled

IVIPicConfig pic_conf;
IVIPlaneDesc planes[3]; ///< color planes

int buf_switch; ///< used to switch between three buffers
int dst_buf; ///< buffer index for the currently decoded frame
int ref_buf; ///< inter frame reference buffer index

IVIHuffTab mb_vlc; ///< current macroblock table descriptor
IVIHuffTab blk_vlc; ///< current block table descriptor

uint16_t checksum; ///< frame checksum

uint8_t rvmap_sel;
uint8_t in_imf;
uint8_t in_q; ///< flag for explicitly stored quantiser delta
uint8_t pic_glob_quant;
uint8_t unknown1;

#if IVI4_STREAM_ANALYSER
uint8_t has_b_frames;
uint8_t has_transp;
uint8_t uses_tiling;
uint8_t uses_haar;
uint8_t uses_fullpel;
#endif
} IVI4DecContext;


static const struct {
InvTransformPtr *inv_trans;
DCTransformPtr *dc_trans;
@@ -158,7 +115,7 @@ static inline int scale_tile_size(int def_size, int size_factor)
* @param[in] avctx pointer to the AVCodecContext
* @return result code: 0 = OK, negative number = error
*/
static int decode_pic_hdr(IVI4DecContext *ctx, AVCodecContext *avctx)
static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
{
int pic_size_indx, i, p;
IVIPicConfig pic_conf;
@@ -322,7 +279,7 @@ static int decode_pic_hdr(IVI4DecContext *ctx, AVCodecContext *avctx)
* @param[in] avctx pointer to the AVCodecContext
* @return result code: 0 = OK, negative number = error
*/
static int decode_band_hdr(IVI4DecContext *ctx, IVIBandDesc *band,
static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
AVCodecContext *avctx)
{
int plane, band_num, indx, transform_id, scan_indx;
@@ -458,7 +415,7 @@ static int decode_band_hdr(IVI4DecContext *ctx, IVIBandDesc *band,
* @param[in] avctx pointer to the AVCodecContext
* @return result code: 0 = OK, negative number = error
*/
static int decode_mb_info(IVI4DecContext *ctx, IVIBandDesc *band,
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, blks_per_mb,
@@ -573,126 +530,12 @@ static int decode_mb_info(IVI4DecContext *ctx, IVIBandDesc *band,
}


/**
* Decode an Indeo 4 band.
*
* @param[in,out] ctx pointer to the decoder context
* @param[in,out] band pointer to the band descriptor
* @param[in] avctx pointer to the AVCodecContext
* @return result code: 0 = OK, negative number = error
*/
static int decode_band(IVI4DecContext *ctx, int plane_num,
IVIBandDesc *band, AVCodecContext *avctx)
{
int result, i, t, pos, idx1, idx2;
IVITile *tile;

band->buf = band->bufs[ctx->dst_buf];
band->ref_buf = band->bufs[ctx->ref_buf];

result = decode_band_hdr(ctx, band, avctx);
if (result) {
av_log(avctx, AV_LOG_ERROR, "Error decoding band header\n");
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];

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));
av_dlog(avctx, "Empty tile encountered!\n");
} else {
tile->data_size = ff_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 = 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 defined(DEBUG) && IVI4_DEBUG_CHECKSUM
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 0;
}


static av_cold int decode_init(AVCodecContext *avctx)
{
IVI4DecContext *ctx = avctx->priv_data;

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));

/* Force allocation of the internal buffers */
/* during picture header decoding. */
ctx->pic_conf.pic_width = 0;
ctx->pic_conf.pic_height = 0;

avctx->pix_fmt = PIX_FMT_YUV410P;

return 0;
}


/**
* Rearrange decoding and reference buffers.
*
* @param[in,out] ctx pointer to the decoder context
*/
static void switch_buffers(IVI4DecContext *ctx)
static void switch_buffers(IVI45DecContext *ctx)
{
switch (ctx->prev_frame_type) {
case FRAMETYPE_INTRA:
@@ -721,95 +564,33 @@ static void switch_buffers(IVI4DecContext *ctx)
}


static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
AVPacket *avpkt)
static int is_nonnull_frame(IVI45DecContext *ctx)
{
IVI4DecContext *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);

result = decode_pic_hdr(ctx, avctx);
if (result) {
av_log(avctx, AV_LOG_ERROR, "Error decoding picture header\n");
return result;
}

switch_buffers(ctx);

if (ctx->frame_type < FRAMETYPE_NULL_FIRST) {
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 decoding band: %d, plane: %d\n", b, p);
return result;
}
}
}
}

/* 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 (ctx->frame_type == 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");
}

if (ctx->frame.data[0])
avctx->release_buffer(avctx, &ctx->frame);

ctx->frame.reference = 0;
if ((result = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return result;
}

if (ctx->is_scalable) {
ff_ivi_recompose_haar(&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;
return ctx->frame_type < FRAMETYPE_NULL_FIRST;
}


static av_cold int decode_close(AVCodecContext *avctx)
static av_cold int decode_init(AVCodecContext *avctx)
{
IVI4DecContext *ctx = avctx->priv_data;
IVI45DecContext *ctx = avctx->priv_data;

ff_ivi_free_buffers(&ctx->planes[0]);
ff_ivi_init_static_vlc();

if (ctx->frame.data[0])
avctx->release_buffer(avctx, &ctx->frame);
/* 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));

#if IVI4_STREAM_ANALYSER
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
/* Force allocation of the internal buffers */
/* during picture header decoding. */
ctx->pic_conf.pic_width = 0;
ctx->pic_conf.pic_height = 0;

avctx->pix_fmt = PIX_FMT_YUV410P;

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;

return 0;
}
@@ -819,9 +600,9 @@ AVCodec ff_indeo4_decoder = {
.name = "indeo4",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_INDEO4,
.priv_data_size = sizeof(IVI4DecContext),
.priv_data_size = sizeof(IVI45DecContext),
.init = decode_init,
.close = decode_close,
.decode = decode_frame,
.close = ff_ivi_decode_close,
.decode = ff_ivi_decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"),
};

+ 21
- 220
libavcodec/indeo5.c View File

@@ -48,37 +48,6 @@ enum {

#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 inter_scal; ///< signals a sequence of scalable inter frames
int dst_buf; ///< buffer index for the currently decoded frame
int ref_buf; ///< inter frame reference buffer index
int ref2_buf; ///< temporal storage for switching buffers
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;


/**
* Decode Indeo5 GOP (Group of pictures) header.
* This header is present in key frames only.
@@ -88,7 +57,7 @@ typedef struct {
* @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx)
static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
{
int result, i, p, tile_size, pic_size_indx, mb_size, blk_size;
int quant_mat, blk_size_changed = 0;
@@ -318,7 +287,7 @@ static inline void skip_hdr_extension(GetBitContext *gb)
* @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
{
if (get_bits(&ctx->gb, 5) != 0x1F) {
av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
@@ -371,7 +340,7 @@ static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx)
* @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
AVCodecContext *avctx)
{
int i;
@@ -441,7 +410,7 @@ static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band,
* @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
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,
@@ -560,102 +529,12 @@ static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band,
}


/**
* Decode an Indeo5 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(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;
}

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]);
}

#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;
}


/**
* Switch buffers.
*
* @param[in,out] ctx ptr to the decoder context
*/
static void switch_buffers(IVI5DecContext *ctx)
static void switch_buffers(IVI45DecContext *ctx)
{
switch (ctx->prev_frame_type) {
case FRAMETYPE_INTRA:
@@ -693,12 +572,18 @@ static void switch_buffers(IVI5DecContext *ctx)
}


static int is_nonnull_frame(IVI45DecContext *ctx)
{
return ctx->frame_type != FRAMETYPE_NULL;
}


/**
* Initialize Indeo5 decoder.
*/
static av_cold int decode_init(AVCodecContext *avctx)
{
IVI5DecContext *ctx = avctx->priv_data;
IVI45DecContext *ctx = avctx->priv_data;
int result;

ff_ivi_init_static_vlc();
@@ -726,97 +611,13 @@ static av_cold int decode_init(AVCodecContext *avctx)
ctx->buf_switch = 0;
ctx->inter_scal = 0;

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;
}
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;

switch_buffers(ctx);

//{ START_TIMER;

if (ctx->frame_type != FRAMETYPE_NULL) {
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;
}


/**
* Close Indeo5 decoder and clean 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)
ff_free_vlc(&ctx->mb_vlc.cust_tab);

if (ctx->frame.data[0])
avctx->release_buffer(avctx, &ctx->frame);
avctx->pix_fmt = PIX_FMT_YUV410P;

return 0;
}
@@ -826,9 +627,9 @@ AVCodec ff_indeo5_decoder = {
.name = "indeo5",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_INDEO5,
.priv_data_size = sizeof(IVI5DecContext),
.priv_data_size = sizeof(IVI45DecContext),
.init = decode_init,
.close = decode_close,
.decode = decode_frame,
.close = ff_ivi_decode_close,
.decode = ff_ivi_decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
};

+ 210
- 0
libavcodec/ivi_common.c View File

@@ -620,6 +620,216 @@ void ff_ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch)
}
}

/**
* 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, 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 = 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];

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));
av_dlog(avctx, "Empty tile encountered!\n");
} else {
tile->data_size = ff_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 = 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]);
}

#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 *data_size,
AVPacket *avpkt)
{
IVI45DecContext *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 = 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_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, 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 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 == 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");
}

if (ctx->frame.data[0])
avctx->release_buffer(avctx, &ctx->frame);

ctx->frame.reference = 0;
if ((result = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return result;
}

if (ctx->is_scalable) {
if (avctx->codec_id == CODEC_ID_INDEO4)
ff_ivi_recompose_haar(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4);
else
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;
}

/**
* Close Indeo5 decoder and clean up its context.
*/
av_cold int ff_ivi_decode_close(AVCodecContext *avctx)
{
IVI45DecContext *ctx = avctx->priv_data;

ff_ivi_free_buffers(&ctx->planes[0]);

if (ctx->mb_vlc.cust_tab.table)
ff_free_vlc(&ctx->mb_vlc.cust_tab);

if (ctx->frame.data[0])
avctx->release_buffer(avctx, &ctx->frame);

#if IVI4_STREAM_ANALYSER
if (avctx->codec_id == 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


+ 60
- 0
libavcodec/ivi_common.h View File

@@ -34,6 +34,8 @@
#include <stdint.h>

#define IVI_VLC_BITS 13 ///< max number of bits of the ivi's huffman codes
#define IVI4_STREAM_ANALYSER 0
#define IVI5_IS_PROTECTED 0x20

/**
* huffman codebook descriptor
@@ -192,6 +194,60 @@ typedef struct {
uint8_t chroma_bands;
} IVIPicConfig;

typedef struct IVI45DecContext {
GetBitContext gb;
AVFrame frame;
RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables

uint32_t frame_num;
int frame_type;
int prev_frame_type; ///< frame type of the previous frame
uint32_t data_size; ///< size of the frame data in bytes from picture header
int is_scalable;
int transp_status; ///< transparency mode status: 1 - enabled
const uint8_t *frame_data; ///< input frame data pointer
int inter_scal; ///< signals a sequence of scalable inter frames
uint32_t frame_size; ///< frame size in bytes
uint32_t pic_hdr_size; ///< picture header size in bytes
uint8_t frame_flags;
uint16_t checksum; ///< frame checksum

IVIPicConfig pic_conf;
IVIPlaneDesc planes[3]; ///< color planes

int buf_switch; ///< used to switch between three buffers
int dst_buf; ///< buffer index for the currently decoded frame
int ref_buf; ///< inter frame reference buffer index
int ref2_buf; ///< temporal storage for switching buffers

IVIHuffTab mb_vlc; ///< current macroblock table descriptor
IVIHuffTab blk_vlc; ///< current block table descriptor

uint8_t rvmap_sel;
uint8_t in_imf;
uint8_t in_q; ///< flag for explicitly stored quantiser delta
uint8_t pic_glob_quant;
uint8_t unknown1;

uint16_t gop_hdr_size;
uint8_t gop_flags;
uint32_t lock_word;

#if IVI4_STREAM_ANALYSER
uint8_t has_b_frames;
uint8_t has_transp;
uint8_t uses_tiling;
uint8_t uses_haar;
uint8_t uses_fullpel;
#endif

int (*decode_pic_hdr) (struct IVI45DecContext *ctx, AVCodecContext *avctx);
int (*decode_band_hdr) (struct IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx);
int (*decode_mb_info) (struct IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx);
void (*switch_buffers) (struct IVI45DecContext *ctx);
int (*is_nonnull_frame)(struct IVI45DecContext *ctx);
} IVI45DecContext;

/** compare some properties of two pictures */
static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2)
{
@@ -348,4 +404,8 @@ uint16_t ivi_calc_band_checksum (IVIBandDesc *band);
*/
int ivi_check_band (IVIBandDesc *band, const uint8_t *ref, int pitch);

int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
AVPacket *avpkt);
av_cold int ff_ivi_decode_close(AVCodecContext *avctx);

#endif /* AVCODEC_IVI_COMMON_H */

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