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ffmpeg.wasm-core
Commit 8ab42021 authored by Anton Khirnov's avatar Anton Khirnov
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ivi_common: make some functions and tables static.

parent 4e5a8878
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Showing with 111 additions and 128 deletions
libavcodec/ivi_common.c
View file @ 8ab42021
......@@ -38,8 +38,8 @@
extern const IVIHuffDesc ff_ivi_mb_huff_desc[8]; ///< static macroblock huffman tables
extern const IVIHuffDesc ff_ivi_blk_huff_desc[8]; ///< static block huffman tables
VLC ff_ivi_mb_vlc_tabs [8];
VLC ff_ivi_blk_vlc_tabs[8];
static VLC ivi_mb_vlc_tabs [8]; ///< static macroblock Huffman tables
static VLC ivi_blk_vlc_tabs[8]; ///< static block Huffman tables
/**
* Reverse "nbits" bits of the value "val" and return the result
......@@ -57,7 +57,16 @@ static uint16_t inv_bits(uint16_t val, int nbits)
return res;
}
int ff_ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag)
/*
* Generate a huffman codebook from the given descriptor
* and convert it into the Libav VLC table.
*
* @param[in] cb pointer to codebook descriptor
* @param[out] vlc where to place the generated VLC table
* @param[in] flag flag: 1 - for static or 0 for dynamic tables
* @return result code: 0 - OK, -1 = error (invalid codebook descriptor)
*/
static int ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag)
{
int pos, i, j, codes_per_row, prefix, not_last_row;
uint16_t codewords[256]; /* FIXME: move this temporal storage out? */
......@@ -100,16 +109,41 @@ void ff_ivi_init_static_vlc(void)
if (initialized_vlcs)
return;
for (i = 0; i < 8; i++) {
ff_ivi_mb_vlc_tabs[i].table = table_data + i * 2 * 8192;
ff_ivi_mb_vlc_tabs[i].table_allocated = 8192;
ff_ivi_create_huff_from_desc(&ff_ivi_mb_huff_desc[i], &ff_ivi_mb_vlc_tabs[i], 1);
ff_ivi_blk_vlc_tabs[i].table = table_data + (i * 2 + 1) * 8192;
ff_ivi_blk_vlc_tabs[i].table_allocated = 8192;
ff_ivi_create_huff_from_desc(&ff_ivi_blk_huff_desc[i], &ff_ivi_blk_vlc_tabs[i], 1);
ivi_mb_vlc_tabs[i].table = table_data + i * 2 * 8192;
ivi_mb_vlc_tabs[i].table_allocated = 8192;
ivi_create_huff_from_desc(&ff_ivi_mb_huff_desc[i], &ivi_mb_vlc_tabs[i], 1);
ivi_blk_vlc_tabs[i].table = table_data + (i * 2 + 1) * 8192;
ivi_blk_vlc_tabs[i].table_allocated = 8192;
ivi_create_huff_from_desc(&ff_ivi_blk_huff_desc[i], &ivi_blk_vlc_tabs[i], 1);
}
initialized_vlcs = 1;
}
/*
* Copy huffman codebook descriptors.
*
* @param[out] dst ptr to the destination descriptor
* @param[in] src ptr to the source descriptor
*/
static void ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src)
{
dst->num_rows = src->num_rows;
memcpy(dst->xbits, src->xbits, src->num_rows);
}
/*
* Compare two huffman codebook descriptors.
*
* @param[in] desc1 ptr to the 1st descriptor to compare
* @param[in] desc2 ptr to the 2nd descriptor to compare
* @return comparison result: 0 - equal, 1 - not equal
*/
static int ivi_huff_desc_cmp(const IVIHuffDesc *desc1, const IVIHuffDesc *desc2)
{
return desc1->num_rows != desc2->num_rows
|| memcmp(desc1->xbits, desc2->xbits, desc1->num_rows);
}
int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
IVIHuffTab *huff_tab, AVCodecContext *avctx)
{
......@@ -118,8 +152,8 @@ int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
if (!desc_coded) {
/* select default table */
huff_tab->tab = (which_tab) ? &ff_ivi_blk_vlc_tabs[7]
: &ff_ivi_mb_vlc_tabs [7];
huff_tab->tab = (which_tab) ? &ivi_blk_vlc_tabs[7]
: &ivi_mb_vlc_tabs [7];
} else {
huff_tab->tab_sel = get_bits(gb, 3);
if (huff_tab->tab_sel == 7) {
......@@ -134,12 +168,12 @@ int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
new_huff.xbits[i] = get_bits(gb, 4);
/* Have we got the same custom table? Rebuild if not. */
if (ff_ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc)) {
ff_ivi_huff_desc_copy(&huff_tab->cust_desc, &new_huff);
if (ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc)) {
ivi_huff_desc_copy(&huff_tab->cust_desc, &new_huff);
if (huff_tab->cust_tab.table)
ff_free_vlc(&huff_tab->cust_tab);
result = ff_ivi_create_huff_from_desc(&huff_tab->cust_desc,
result = ivi_create_huff_from_desc(&huff_tab->cust_desc,
&huff_tab->cust_tab, 0);
if (result) {
huff_tab->cust_desc.num_rows = 0; // reset faulty description
......@@ -151,24 +185,37 @@ int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
huff_tab->tab = &huff_tab->cust_tab;
} else {
/* select one of predefined tables */
huff_tab->tab = (which_tab) ? &ff_ivi_blk_vlc_tabs[huff_tab->tab_sel]
: &ff_ivi_mb_vlc_tabs [huff_tab->tab_sel];
huff_tab->tab = (which_tab) ? &ivi_blk_vlc_tabs[huff_tab->tab_sel]
: &ivi_mb_vlc_tabs [huff_tab->tab_sel];
}
}
return 0;
}
int ff_ivi_huff_desc_cmp(const IVIHuffDesc *desc1, const IVIHuffDesc *desc2)
/*
* Free planes, bands and macroblocks buffers.
*
* @param[in] planes pointer to the array of the plane descriptors
*/
static av_cold void ivi_free_buffers(IVIPlaneDesc *planes)
{
return desc1->num_rows != desc2->num_rows
|| memcmp(desc1->xbits, desc2->xbits, desc1->num_rows);
}
int p, b, t;
void ff_ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src)
{
dst->num_rows = src->num_rows;
memcpy(dst->xbits, src->xbits, src->num_rows);
for (p = 0; p < 3; p++) {
for (b = 0; b < planes[p].num_bands; b++) {
av_freep(&planes[p].bands[b].bufs[0]);
av_freep(&planes[p].bands[b].bufs[1]);
av_freep(&planes[p].bands[b].bufs[2]);
if (planes[p].bands[b].blk_vlc.cust_tab.table)
ff_free_vlc(&planes[p].bands[b].blk_vlc.cust_tab);
for (t = 0; t < planes[p].bands[b].num_tiles; t++)
av_freep(&planes[p].bands[b].tiles[t].mbs);
av_freep(&planes[p].bands[b].tiles);
}
av_freep(&planes[p].bands);
}
}
av_cold int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg)
......@@ -177,7 +224,7 @@ av_cold int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg)
uint32_t b_width, b_height, align_fac, width_aligned, height_aligned, buf_size;
IVIBandDesc *band;
ff_ivi_free_buffers(planes);
ivi_free_buffers(planes);
/* fill in the descriptor of the luminance plane */
planes[0].width = cfg->pic_width;
......@@ -234,26 +281,6 @@ av_cold int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg)
return 0;
}
av_cold void ff_ivi_free_buffers(IVIPlaneDesc *planes)
{
int p, b, t;
for (p = 0; p < 3; p++) {
for (b = 0; b < planes[p].num_bands; b++) {
av_freep(&planes[p].bands[b].bufs[0]);
av_freep(&planes[p].bands[b].bufs[1]);
av_freep(&planes[p].bands[b].bufs[2]);
if (planes[p].bands[b].blk_vlc.cust_tab.table)
ff_free_vlc(&planes[p].bands[b].blk_vlc.cust_tab);
for (t = 0; t < planes[p].bands[b].num_tiles; t++)
av_freep(&planes[p].bands[b].tiles[t].mbs);
av_freep(&planes[p].bands[b].tiles);
}
av_freep(&planes[p].bands);
}
}
av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height)
{
int p, b, x, y, x_tiles, y_tiles, t_width, t_height;
......@@ -319,7 +346,17 @@ av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_hei
return 0;
}
int ff_ivi_dec_tile_data_size(GetBitContext *gb)
/*
* Decode size of the tile data.
* The size is stored as a variable-length field having the following format:
* if (tile_data_size < 255) than this field is only one byte long
* if (tile_data_size >= 255) than this field four is byte long: 0xFF X1 X2 X3
* where X1-X3 is size of the tile data
*
* @param[in,out] gb the GetBit context
* @return size of the tile data in bytes
*/
static int ivi_dec_tile_data_size(GetBitContext *gb)
{
int len;
......@@ -336,7 +373,18 @@ int ff_ivi_dec_tile_data_size(GetBitContext *gb)
return len;
}
int ff_ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile)
/*
* Decode block data:
* extract huffman-coded transform coefficients from the bitstream,
* dequantize them, apply inverse transform and motion compensation
* in order to reconstruct the picture.
*
* @param[in,out] gb the GetBit context
* @param[in] band pointer to the band descriptor
* @param[in] tile pointer to the tile descriptor
* @return result code: 0 - OK, -1 = error (corrupted blocks data)
*/
static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile)
{
int mbn, blk, num_blocks, num_coeffs, blk_size, scan_pos, run, val,
pos, is_intra, mc_type = 0, mv_x, mv_y, col_mask;
......@@ -620,7 +668,16 @@ static uint16_t ivi_calc_band_checksum(IVIBandDesc *band)
}
#endif
void ff_ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch)
/*
* Convert and output the current plane.
* This conversion is done by adding back the bias value of 128
* (subtracted in the encoder) and clipping the result.
*
* @param[in] plane pointer to the descriptor of the plane being processed
* @param[out] dst pointer to the buffer receiving converted pixels
* @param[in] dst_pitch pitch for moving to the next y line
*/
static void ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch)
{
int x, y;
const int16_t *src = plane->bands[0].buf;
......@@ -699,7 +756,7 @@ static int decode_band(IVI45DecContext *ctx,
break;
av_dlog(avctx, "Empty tile encountered!\n");
} else {
tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
tile->data_size = ivi_dec_tile_data_size(&ctx->gb);
if (!tile->data_size) {
av_log(avctx, AV_LOG_ERROR, "Tile data size is zero!\n");
return AVERROR_INVALIDDATA;
......@@ -709,7 +766,7 @@ static int decode_band(IVI45DecContext *ctx,
if (result < 0)
break;
result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
result = 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;
......@@ -814,11 +871,11 @@ int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
else
ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
} else {
ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
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]);
ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
*got_frame = 1;
*(AVFrame*)data = ctx->frame;
......@@ -833,7 +890,7 @@ av_cold int ff_ivi_decode_close(AVCodecContext *avctx)
{
IVI45DecContext *ctx = avctx->priv_data;
ff_ivi_free_buffers(&ctx->planes[0]);
ivi_free_buffers(&ctx->planes[0]);
if (ctx->mb_vlc.cust_tab.table)
ff_free_vlc(&ctx->mb_vlc.cust_tab);
......
libavcodec/ivi_common.h
View file @ 8ab42021
......@@ -63,9 +63,6 @@ enum {
IVI_BLK_HUFF = 1 /// Huffman table is used for coding blocks
};
extern VLC ff_ivi_mb_vlc_tabs [8]; ///< static macroblock Huffman tables
extern VLC ff_ivi_blk_vlc_tabs[8]; ///< static block Huffman tables
/**
* Common scan patterns (defined in ivi_common.c)
......@@ -277,17 +274,6 @@ static inline int ivi_scale_mv(int mv, int mv_scale)
return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale;
}
/**
* Generate a huffman codebook from the given descriptor
* and convert it into the Libav VLC table.
*
* @param[in] cb pointer to codebook descriptor
* @param[out] vlc where to place the generated VLC table
* @param[in] flag flag: 1 - for static or 0 for dynamic tables
* @return result code: 0 - OK, -1 = error (invalid codebook descriptor)
*/
int ff_ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag);
/**
* Initialize static codes used for macroblock and block decoding.
*/
......@@ -307,23 +293,6 @@ void ff_ivi_init_static_vlc(void);
int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
IVIHuffTab *huff_tab, AVCodecContext *avctx);
/**
* Compare two huffman codebook descriptors.
*
* @param[in] desc1 ptr to the 1st descriptor to compare
* @param[in] desc2 ptr to the 2nd descriptor to compare
* @return comparison result: 0 - equal, 1 - not equal
*/
int ff_ivi_huff_desc_cmp(const IVIHuffDesc *desc1, const IVIHuffDesc *desc2);
/**
* Copy huffman codebook descriptors.
*
* @param[out] dst ptr to the destination descriptor
* @param[in] src ptr to the source descriptor
*/
void ff_ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src);
/**
* Initialize planes (prepares descriptors, allocates buffers etc).
*
......@@ -333,13 +302,6 @@ void ff_ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src);
*/
int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg);
/**
* Free planes, bands and macroblocks buffers.
*
* @param[in] planes pointer to the array of the plane descriptors
*/
void ff_ivi_free_buffers(IVIPlaneDesc *planes);
/**
* Initialize tile and macroblock descriptors.
*
......@@ -350,42 +312,6 @@ void ff_ivi_free_buffers(IVIPlaneDesc *planes);
*/
int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height);
/**
* Decode size of the tile data.
* The size is stored as a variable-length field having the following format:
* if (tile_data_size < 255) than this field is only one byte long
* if (tile_data_size >= 255) than this field four is byte long: 0xFF X1 X2 X3
* where X1-X3 is size of the tile data
*
* @param[in,out] gb the GetBit context
* @return size of the tile data in bytes
*/
int ff_ivi_dec_tile_data_size(GetBitContext *gb);
/**
* Decode block data:
* extract huffman-coded transform coefficients from the bitstream,
* dequantize them, apply inverse transform and motion compensation
* in order to reconstruct the picture.
*
* @param[in,out] gb the GetBit context
* @param[in] band pointer to the band descriptor
* @param[in] tile pointer to the tile descriptor
* @return result code: 0 - OK, -1 = error (corrupted blocks data)
*/
int ff_ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile);
/**
* Convert and output the current plane.
* This conversion is done by adding back the bias value of 128
* (subtracted in the encoder) and clipping the result.
*
* @param[in] plane pointer to the descriptor of the plane being processed
* @param[out] dst pointer to the buffer receiving converted pixels
* @param[in] dst_pitch pitch for moving to the next y line
*/
void ff_ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch);
int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt);
av_cold int ff_ivi_decode_close(AVCodecContext *avctx);
......
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