diff options
Diffstat (limited to 'drivers/webp/dec/vp8i.h')
| -rw-r--r-- | drivers/webp/dec/vp8i.h | 158 |
1 files changed, 67 insertions, 91 deletions
diff --git a/drivers/webp/dec/vp8i.h b/drivers/webp/dec/vp8i.h index 3f4cf297d9..4382edfd8e 100644 --- a/drivers/webp/dec/vp8i.h +++ b/drivers/webp/dec/vp8i.h @@ -1,10 +1,8 @@ // Copyright 2010 Google Inc. All Rights Reserved. // -// Use of this source code is governed by a BSD-style license -// that can be found in the COPYING file in the root of the source -// tree. An additional intellectual property rights grant can be found -// in the file PATENTS. All contributing project authors may -// be found in the AUTHORS file in the root of the source tree. +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ // ----------------------------------------------------------------------------- // // VP8 decoder: internal header. @@ -17,11 +15,10 @@ #include <string.h> // for memcpy() #include "./vp8li.h" #include "../utils/bit_reader.h" -#include "../utils/random.h" #include "../utils/thread.h" #include "../dsp/dsp.h" -#ifdef __cplusplus +#if defined(__cplusplus) || defined(c_plusplus) extern "C" { #endif @@ -30,9 +27,11 @@ extern "C" { // version numbers #define DEC_MAJ_VERSION 0 -#define DEC_MIN_VERSION 4 +#define DEC_MIN_VERSION 2 #define DEC_REV_VERSION 0 +#define ONLY_KEYFRAME_CODE // to remove any code related to P-Frames + // intra prediction modes enum { B_DC_PRED = 0, // 4x4 modes B_TM_PRED, @@ -99,9 +98,6 @@ enum { MB_FEATURE_TREE_PROBS = 3, #define U_OFF (Y_OFF + BPS * 16 + BPS) #define V_OFF (U_OFF + 16) -// minimal width under which lossy multi-threading is always disabled -#define MIN_WIDTH_FOR_THREADS 512 - //------------------------------------------------------------------------------ // Headers @@ -130,19 +126,15 @@ typedef struct { int8_t filter_strength_[NUM_MB_SEGMENTS]; // filter strength for segments } VP8SegmentHeader; - -// probas associated to one of the contexts -typedef uint8_t VP8ProbaArray[NUM_PROBAS]; - -typedef struct { // all the probas associated to one band - VP8ProbaArray probas_[NUM_CTX]; -} VP8BandProbas; - // Struct collecting all frame-persistent probabilities. typedef struct { uint8_t segments_[MB_FEATURE_TREE_PROBS]; // Type: 0:Intra16-AC 1:Intra16-DC 2:Chroma 3:Intra4 - VP8BandProbas bands_[NUM_TYPES][NUM_BANDS]; + uint8_t coeffs_[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS]; +#ifndef ONLY_KEYFRAME_CODE + uint8_t ymode_[4], uvmode_[3]; + uint8_t mv_[2][NUM_MV_PROBAS]; +#endif } VP8Proba; // Filter parameters @@ -159,59 +151,32 @@ typedef struct { // Informations about the macroblocks. typedef struct { // filter specs - uint8_t f_limit_; // filter limit in [3..189], or 0 if no filtering - uint8_t f_ilevel_; // inner limit in [1..63] - uint8_t f_inner_; // do inner filtering? - uint8_t hev_thresh_; // high edge variance threshold in [0..2] + unsigned int f_level_:6; // filter strength: 0..63 + unsigned int f_ilevel_:6; // inner limit: 1..63 + unsigned int f_inner_:1; // do inner filtering? } VP8FInfo; -typedef struct { // Top/Left Contexts used for syntax-parsing - uint8_t nz_; // non-zero AC/DC coeffs (4bit for luma + 4bit for chroma) - uint8_t nz_dc_; // non-zero DC coeff (1bit) +typedef struct { // used for syntax-parsing + unsigned int nz_; // non-zero AC/DC coeffs + unsigned int dc_nz_:1; // non-zero DC coeffs + unsigned int skip_:1; // block type } VP8MB; // Dequantization matrices typedef int quant_t[2]; // [DC / AC]. Can be 'uint16_t[2]' too (~slower). typedef struct { quant_t y1_mat_, y2_mat_, uv_mat_; - - int uv_quant_; // U/V quantizer value - int dither_; // dithering amplitude (0 = off, max=255) } VP8QuantMatrix; -// Data needed to reconstruct a macroblock -typedef struct { - int16_t coeffs_[384]; // 384 coeffs = (16+4+4) * 4*4 - uint8_t is_i4x4_; // true if intra4x4 - uint8_t imodes_[16]; // one 16x16 mode (#0) or sixteen 4x4 modes - uint8_t uvmode_; // chroma prediction mode - // bit-wise info about the content of each sub-4x4 blocks (in decoding order). - // Each of the 4x4 blocks for y/u/v is associated with a 2b code according to: - // code=0 -> no coefficient - // code=1 -> only DC - // code=2 -> first three coefficients are non-zero - // code=3 -> more than three coefficients are non-zero - // This allows to call specialized transform functions. - uint32_t non_zero_y_; - uint32_t non_zero_uv_; - uint8_t dither_; // local dithering strength (deduced from non_zero_*) -} VP8MBData; - // Persistent information needed by the parallel processing typedef struct { - int id_; // cache row to process (in [0..2]) - int mb_y_; // macroblock position of the row - int filter_row_; // true if row-filtering is needed - VP8FInfo* f_info_; // filter strengths (swapped with dec->f_info_) - VP8MBData* mb_data_; // reconstruction data (swapped with dec->mb_data_) - VP8Io io_; // copy of the VP8Io to pass to put() + int id_; // cache row to process (in [0..2]) + int mb_y_; // macroblock position of the row + int filter_row_; // true if row-filtering is needed + VP8FInfo* f_info_; // filter strengths + VP8Io io_; // copy of the VP8Io to pass to put() } VP8ThreadContext; -// Saved top samples, per macroblock. Fits into a cache-line. -typedef struct { - uint8_t y[16], u[8], v[8]; -} VP8TopSamples; - //------------------------------------------------------------------------------ // VP8Decoder: the main opaque structure handed over to user @@ -231,8 +196,7 @@ struct VP8Decoder { // Worker WebPWorker worker_; - int mt_method_; // multi-thread method: 0=off, 1=[parse+recon][filter] - // 2=[parse][recon+filter] + int use_threads_; // use multi-thread int cache_id_; // current cache row int num_caches_; // number of cached rows of 16 pixels (1, 2 or 3) VP8ThreadContext thread_ctx_; // Thread context @@ -249,9 +213,12 @@ struct VP8Decoder { // per-partition boolean decoders. VP8BitReader parts_[MAX_NUM_PARTITIONS]; - // Dithering strength, deduced from decoding options - int dither_; // whether to use dithering or not - VP8Random dithering_rg_; // random generator for dithering + // buffer refresh flags + // bit 0: refresh Gold, bit 1: refresh Alt + // bit 2-3: copy to Gold, bit 4-5: copy to Alt + // bit 6: Gold sign bias, bit 7: Alt sign bias + // bit 8: refresh last frame + uint32_t buffer_flags_; // dequantization (one set of DC/AC dequant factor per segment) VP8QuantMatrix dqm_[NUM_MB_SEGMENTS]; @@ -260,19 +227,24 @@ struct VP8Decoder { VP8Proba proba_; int use_skip_proba_; uint8_t skip_p_; +#ifndef ONLY_KEYFRAME_CODE + uint8_t intra_p_, last_p_, golden_p_; + VP8Proba proba_saved_; + int update_proba_; +#endif // Boundary data cache and persistent buffers. - uint8_t* intra_t_; // top intra modes values: 4 * mb_w_ - uint8_t intra_l_[4]; // left intra modes values - - uint8_t segment_; // segment of the currently parsed block - VP8TopSamples* yuv_t_; // top y/u/v samples + uint8_t* intra_t_; // top intra modes values: 4 * mb_w_ + uint8_t intra_l_[4]; // left intra modes values + uint8_t* y_t_; // top luma samples: 16 * mb_w_ + uint8_t* u_t_, *v_t_; // top u/v samples: 8 * mb_w_ each - VP8MB* mb_info_; // contextual macroblock info (mb_w_ + 1) - VP8FInfo* f_info_; // filter strength info - uint8_t* yuv_b_; // main block for Y/U/V (size = YUV_SIZE) + VP8MB* mb_info_; // contextual macroblock info (mb_w_ + 1) + VP8FInfo* f_info_; // filter strength info + uint8_t* yuv_b_; // main block for Y/U/V (size = YUV_SIZE) + int16_t* coeffs_; // 384 coeffs = (16+8+8) * 4*4 - uint8_t* cache_y_; // macroblock row for storing unfiltered samples + uint8_t* cache_y_; // macroblock row for storing unfiltered samples uint8_t* cache_u_; uint8_t* cache_v_; int cache_y_stride_; @@ -284,20 +256,28 @@ struct VP8Decoder { // Per macroblock non-persistent infos. int mb_x_, mb_y_; // current position, in macroblock units - VP8MBData* mb_data_; // parsed reconstruction data + uint8_t is_i4x4_; // true if intra4x4 + uint8_t imodes_[16]; // one 16x16 mode (#0) or sixteen 4x4 modes + uint8_t uvmode_; // chroma prediction mode + uint8_t segment_; // block's segment + + // bit-wise info about the content of each sub-4x4 blocks: there are 16 bits + // for luma (bits #0->#15), then 4 bits for chroma-u (#16->#19) and 4 bits for + // chroma-v (#20->#23), each corresponding to one 4x4 block in decoding order. + // If the bit is set, the 4x4 block contains some non-zero coefficients. + uint32_t non_zero_; + uint32_t non_zero_ac_; // Filtering side-info - int filter_type_; // 0=off, 1=simple, 2=complex - VP8FInfo fstrengths_[NUM_MB_SEGMENTS][2]; // precalculated per-segment/type + int filter_type_; // 0=off, 1=simple, 2=complex + int filter_row_; // per-row flag + uint8_t filter_levels_[NUM_MB_SEGMENTS]; // precalculated per-segment - // Alpha - struct ALPHDecoder* alph_dec_; // alpha-plane decoder object - const uint8_t* alpha_data_; // compressed alpha data (if present) + // extensions + const uint8_t* alpha_data_; // compressed alpha data (if present) size_t alpha_data_size_; - int is_alpha_decoded_; // true if alpha_data_ is decoded in alpha_plane_ uint8_t* alpha_plane_; // output. Persistent, contains the whole data. - // extensions int layer_colorspace_; const uint8_t* layer_data_; // compressed layer data (if present) size_t layer_data_size_; @@ -320,6 +300,8 @@ void VP8ParseQuant(VP8Decoder* const dec); // in frame.c int VP8InitFrame(VP8Decoder* const dec, VP8Io* io); +// Predict a block and add residual +void VP8ReconstructBlock(VP8Decoder* const dec); // Call io->setup() and finish setting up scan parameters. // After this call returns, one must always call VP8ExitCritical() with the // same parameters. Both functions should be used in pair. Returns VP8_STATUS_OK @@ -328,16 +310,10 @@ VP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io); // Must always be called in pair with VP8EnterCritical(). // Returns false in case of error. int VP8ExitCritical(VP8Decoder* const dec, VP8Io* const io); -// Return the multi-threading method to use (0=off), depending -// on options and bitstream size. Only for lossy decoding. -int VP8GetThreadMethod(const WebPDecoderOptions* const options, - const WebPHeaderStructure* const headers, - int width, int height); -// Initialize dithering post-process if needed. -void VP8InitDithering(const WebPDecoderOptions* const options, - VP8Decoder* const dec); -// Process the last decoded row (filtering + output). +// Process the last decoded row (filtering + output) int VP8ProcessRow(VP8Decoder* const dec, VP8Io* const io); +// Store a block, along with filtering params +void VP8StoreBlock(VP8Decoder* const dec); // To be called at the start of a new scanline, to initialize predictors. void VP8InitScanline(VP8Decoder* const dec); // Decode one macroblock. Returns false if there is not enough data. @@ -352,7 +328,7 @@ int VP8DecodeLayer(VP8Decoder* const dec); //------------------------------------------------------------------------------ -#ifdef __cplusplus +#if defined(__cplusplus) || defined(c_plusplus) } // extern "C" #endif |