From 8ab42021f25390f3539a137fea6430d5fc1e0bf6 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Thu, 13 Dec 2012 19:25:52 +0100 Subject: ivi_common: make some functions and tables static. --- libavcodec/ivi_common.c | 165 ++++++++++++++++++++++++++++++++---------------- 1 file changed, 111 insertions(+), 54 deletions(-) (limited to 'libavcodec/ivi_common.c') diff --git a/libavcodec/ivi_common.c b/libavcodec/ivi_common.c index cc5224cf39..3338bbfbb6 100644 --- a/libavcodec/ivi_common.c +++ b/libavcodec/ivi_common.c @@ -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); -- cgit v1.2.3