From 09fec2b9298c3c292eae1dacea7e1cd8467c101c Mon Sep 17 00:00:00 2001 From: Reimar Döffinger Date: Sat, 12 Jul 2008 15:02:40 +0000 Subject: Use new style static VLC tables for IMC decoder. Also fixes a memleak due to the previous in-context tables not being freed. Originally committed as revision 14182 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/imc.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) (limited to 'libavcodec/imc.c') diff --git a/libavcodec/imc.c b/libavcodec/imc.c index 934de4a6a9..d316ba4cbb 100644 --- a/libavcodec/imc.c +++ b/libavcodec/imc.c @@ -79,7 +79,6 @@ typedef struct { int codewords[COEFFS]; ///< raw codewords read from bitstream float sqrt_tab[30]; GetBitContext gb; - VLC huffman_vlc[4][4]; int decoder_reset; float one_div_log2; @@ -89,6 +88,15 @@ typedef struct { DECLARE_ALIGNED_16(float, out_samples[COEFFS]); } IMCContext; +static VLC huffman_vlc[4][4]; + +#define VLC_TABLES_SIZE 9512 + +static const int vlc_offsets[17] = { + 0, 640, 1156, 1732, 2308, 2852, 3396, 3924, + 4452, 5220, 5860, 6628, 7268, 7908, 8424, 8936, VLC_TABLES_SIZE}; + +static VLC_TYPE vlc_tables[VLC_TABLES_SIZE][2]; static av_cold int imc_decode_init(AVCodecContext * avctx) { @@ -135,9 +143,11 @@ static av_cold int imc_decode_init(AVCodecContext * avctx) /* initialize the VLC tables */ for(i = 0; i < 4 ; i++) { for(j = 0; j < 4; j++) { - init_vlc (&q->huffman_vlc[i][j], 9, imc_huffman_sizes[i], + huffman_vlc[i][j].table = vlc_tables[vlc_offsets[i * 4 + j]]; + huffman_vlc[i][j].table_allocated = vlc_offsets[i * 4 + j + 1] - vlc_offsets[i * 4 + j]; + init_vlc(&huffman_vlc[i][j], 9, imc_huffman_sizes[i], imc_huffman_lens[i][j], 1, 1, - imc_huffman_bits[i][j], 2, 2, 1); + imc_huffman_bits[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC); } } q->one_div_log2 = 1/log(2); @@ -210,10 +220,10 @@ static void imc_read_level_coeffs(IMCContext* q, int stream_format_code, int* le int s; s = stream_format_code >> 1; - hufftab[0] = &q->huffman_vlc[s][0]; - hufftab[1] = &q->huffman_vlc[s][1]; - hufftab[2] = &q->huffman_vlc[s][2]; - hufftab[3] = &q->huffman_vlc[s][3]; + hufftab[0] = &huffman_vlc[s][0]; + hufftab[1] = &huffman_vlc[s][1]; + hufftab[2] = &huffman_vlc[s][2]; + hufftab[3] = &huffman_vlc[s][3]; cb_sel = imc_cb_select[s]; if(stream_format_code & 4) -- cgit v1.2.3