From 05da586fef865274d44da57f841068b5f17c812c Mon Sep 17 00:00:00 2001 From: Christophe Gisquet Date: Sat, 25 Oct 2014 11:19:25 +0000 Subject: dv: move inverse weight tables to decoder The encoder has its own tables and does not access the idct_factor member of the DVVideoContext structure. Signed-off-by: Michael Niedermayer --- libavcodec/dvdec.c | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) (limited to 'libavcodec/dvdec.c') diff --git a/libavcodec/dvdec.c b/libavcodec/dvdec.c index 3af14b8..4f0d0f6 100644 --- a/libavcodec/dvdec.c +++ b/libavcodec/dvdec.c @@ -62,6 +62,117 @@ typedef struct BlockInfo { static const int dv_iweight_bits = 14; +static const uint16_t dv_iweight_88[64] = { + 32768, 16705, 16705, 17734, 17032, 17734, 18205, 18081, + 18081, 18205, 18725, 18562, 19195, 18562, 18725, 19266, + 19091, 19705, 19705, 19091, 19266, 21407, 19643, 20267, + 20228, 20267, 19643, 21407, 22725, 21826, 20853, 20806, + 20806, 20853, 21826, 22725, 23170, 23170, 21407, 21400, + 21407, 23170, 23170, 24598, 23786, 22018, 22018, 23786, + 24598, 25251, 24465, 22654, 24465, 25251, 25972, 25172, + 25172, 25972, 26722, 27969, 26722, 29692, 29692, 31521, +}; +static const uint16_t dv_iweight_248[64] = { + 32768, 16384, 16705, 16705, 17734, 17734, 17734, 17734, + 18081, 18081, 18725, 18725, 21407, 21407, 19091, 19091, + 19195, 19195, 18205, 18205, 18725, 18725, 19705, 19705, + 20267, 20267, 21826, 21826, 23170, 23170, 20806, 20806, + 20267, 20267, 19266, 19266, 21407, 21407, 20853, 20853, + 21400, 21400, 23786, 23786, 24465, 24465, 22018, 22018, + 23170, 23170, 22725, 22725, 24598, 24598, 24465, 24465, + 25172, 25172, 27969, 27969, 25972, 25972, 29692, 29692 +}; + +/** + * The "inverse" DV100 weights are actually just the spec weights (zig-zagged). + */ +static const uint16_t dv_iweight_1080_y[64] = { + 128, 16, 16, 17, 17, 17, 18, 18, + 18, 18, 18, 18, 19, 18, 18, 19, + 19, 19, 19, 19, 19, 42, 38, 40, + 40, 40, 38, 42, 44, 43, 41, 41, + 41, 41, 43, 44, 45, 45, 42, 42, + 42, 45, 45, 48, 46, 43, 43, 46, + 48, 49, 48, 44, 48, 49, 101, 98, + 98, 101, 104, 109, 104, 116, 116, 123, +}; +static const uint16_t dv_iweight_1080_c[64] = { + 128, 16, 16, 17, 17, 17, 25, 25, + 25, 25, 26, 25, 26, 25, 26, 26, + 26, 27, 27, 26, 26, 42, 38, 40, + 40, 40, 38, 42, 44, 43, 41, 41, + 41, 41, 43, 44, 91, 91, 84, 84, + 84, 91, 91, 96, 93, 86, 86, 93, + 96, 197, 191, 177, 191, 197, 203, 197, + 197, 203, 209, 219, 209, 232, 232, 246, +}; +static const uint16_t dv_iweight_720_y[64] = { + 128, 16, 16, 17, 17, 17, 18, 18, + 18, 18, 18, 18, 19, 18, 18, 19, + 19, 19, 19, 19, 19, 42, 38, 40, + 40, 40, 38, 42, 44, 43, 41, 41, + 41, 41, 43, 44, 68, 68, 63, 63, + 63, 68, 68, 96, 92, 86, 86, 92, + 96, 98, 96, 88, 96, 98, 202, 196, + 196, 202, 208, 218, 208, 232, 232, 246, +}; +const uint16_t dv_iweight_720_c[64] = { + 128, 24, 24, 26, 26, 26, 36, 36, + 36, 36, 36, 36, 38, 36, 36, 38, + 38, 38, 38, 38, 38, 84, 76, 80, + 80, 80, 76, 84, 88, 86, 82, 82, + 82, 82, 86, 88, 182, 182, 168, 168, + 168, 182, 182, 192, 186, 192, 172, 186, + 192, 394, 382, 354, 382, 394, 406, 394, + 394, 406, 418, 438, 418, 464, 464, 492, +}; + +static void dv_init_weight_tables(DVVideoContext *ctx, const AVDVProfile *d) +{ + int j, i, c, s; + uint32_t *factor1 = &ctx->idct_factor[0], + *factor2 = &ctx->idct_factor[DV_PROFILE_IS_HD(d) ? 4096 : 2816]; + + if (DV_PROFILE_IS_HD(d)) { + /* quantization quanta by QNO for DV100 */ + static const uint8_t dv100_qstep[16] = { + 1, /* QNO = 0 and 1 both have no quantization */ + 1, + 2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52 + }; + const uint16_t *iweight1, *iweight2; + + if (d->height == 720) { + iweight1 = &dv_iweight_720_y[0]; + iweight2 = &dv_iweight_720_c[0]; + } else { + iweight1 = &dv_iweight_1080_y[0]; + iweight2 = &dv_iweight_1080_c[0]; + } + for (c = 0; c < 4; c++) { + for (s = 0; s < 16; s++) { + for (i = 0; i < 64; i++) { + *factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i]; + *factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i]; + } + } + } + } else { + static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 }; + const uint16_t *iweight1 = &dv_iweight_88[0]; + for (j = 0; j < 2; j++, iweight1 = &dv_iweight_248[0]) { + for (s = 0; s < 22; s++) { + for (i = c = 0; c < 4; c++) { + for (; i < dv_quant_areas[c]; i++) { + *factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1); + *factor2++ = (*factor1++) << 1; + } + } + } + } + } +} + static av_cold int dvvideo_decode_init(AVCodecContext *avctx) { DVVideoContext *s = avctx->priv_data; @@ -375,6 +486,7 @@ static int dvvideo_decode_frame(AVCodecContext *avctx, void *data, av_log(avctx, AV_LOG_ERROR, "Error initializing the work tables.\n"); return ret; } + dv_init_weight_tables(s, sys); s->sys = sys; } -- cgit v1.1