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authorChristian Schneppe <christian@pix-art.de>2016-08-26 23:48:48 +0200
committerChristian Schneppe <christian@pix-art.de>2016-08-28 21:33:19 +0200
commitb3b3475e93a9b08f9e35edbf74673728b560ad3b (patch)
treefc72bfce668b358310061c0a94736a0bd14e8b5d /src/main/jni/libwebp/enc/webpenc.c
parent1f7f535d37b844dbd87447e1872c270edbca1302 (diff)
compress videos bigger than 10 MB before sending
Diffstat (limited to 'src/main/jni/libwebp/enc/webpenc.c')
-rw-r--r--src/main/jni/libwebp/enc/webpenc.c382
1 files changed, 382 insertions, 0 deletions
diff --git a/src/main/jni/libwebp/enc/webpenc.c b/src/main/jni/libwebp/enc/webpenc.c
new file mode 100644
index 000000000..0cb83f125
--- /dev/null
+++ b/src/main/jni/libwebp/enc/webpenc.c
@@ -0,0 +1,382 @@
+// Copyright 2011 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.
+// -----------------------------------------------------------------------------
+//
+// WebP encoder: main entry point
+//
+// Author: Skal (pascal.massimino@gmail.com)
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#include "./vp8enci.h"
+#include "./vp8li.h"
+#include "./cost.h"
+#include "../utils/utils.h"
+
+// #define PRINT_MEMORY_INFO
+
+#ifdef PRINT_MEMORY_INFO
+#include <stdio.h>
+#endif
+
+//------------------------------------------------------------------------------
+
+int WebPGetEncoderVersion(void) {
+ return (ENC_MAJ_VERSION << 16) | (ENC_MIN_VERSION << 8) | ENC_REV_VERSION;
+}
+
+//------------------------------------------------------------------------------
+// VP8Encoder
+//------------------------------------------------------------------------------
+
+static void ResetSegmentHeader(VP8Encoder* const enc) {
+ VP8SegmentHeader* const hdr = &enc->segment_hdr_;
+ hdr->num_segments_ = enc->config_->segments;
+ hdr->update_map_ = (hdr->num_segments_ > 1);
+ hdr->size_ = 0;
+}
+
+static void ResetFilterHeader(VP8Encoder* const enc) {
+ VP8FilterHeader* const hdr = &enc->filter_hdr_;
+ hdr->simple_ = 1;
+ hdr->level_ = 0;
+ hdr->sharpness_ = 0;
+ hdr->i4x4_lf_delta_ = 0;
+}
+
+static void ResetBoundaryPredictions(VP8Encoder* const enc) {
+ // init boundary values once for all
+ // Note: actually, initializing the preds_[] is only needed for intra4.
+ int i;
+ uint8_t* const top = enc->preds_ - enc->preds_w_;
+ uint8_t* const left = enc->preds_ - 1;
+ for (i = -1; i < 4 * enc->mb_w_; ++i) {
+ top[i] = B_DC_PRED;
+ }
+ for (i = 0; i < 4 * enc->mb_h_; ++i) {
+ left[i * enc->preds_w_] = B_DC_PRED;
+ }
+ enc->nz_[-1] = 0; // constant
+}
+
+// Mapping from config->method_ to coding tools used.
+//-------------------+---+---+---+---+---+---+---+
+// Method | 0 | 1 | 2 | 3 |(4)| 5 | 6 |
+//-------------------+---+---+---+---+---+---+---+
+// fast probe | x | | | x | | | |
+//-------------------+---+---+---+---+---+---+---+
+// dynamic proba | ~ | x | x | x | x | x | x |
+//-------------------+---+---+---+---+---+---+---+
+// fast mode analysis| | | | | x | x | x |
+//-------------------+---+---+---+---+---+---+---+
+// basic rd-opt | | | | x | x | x | x |
+//-------------------+---+---+---+---+---+---+---+
+// disto-score i4/16 | | | x | | | | |
+//-------------------+---+---+---+---+---+---+---+
+// rd-opt i4/16 | | | ~ | x | x | x | x |
+//-------------------+---+---+---+---+---+---+---+
+// token buffer (opt)| | | | x | x | x | x |
+//-------------------+---+---+---+---+---+---+---+
+// Trellis | | | | | | x |Ful|
+//-------------------+---+---+---+---+---+---+---+
+// full-SNS | | | | | x | x | x |
+//-------------------+---+---+---+---+---+---+---+
+
+static void MapConfigToTools(VP8Encoder* const enc) {
+ const WebPConfig* const config = enc->config_;
+ const int method = config->method;
+ const int limit = 100 - config->partition_limit;
+ enc->method_ = method;
+ enc->rd_opt_level_ = (method >= 6) ? RD_OPT_TRELLIS_ALL
+ : (method >= 5) ? RD_OPT_TRELLIS
+ : (method >= 3) ? RD_OPT_BASIC
+ : RD_OPT_NONE;
+ enc->max_i4_header_bits_ =
+ 256 * 16 * 16 * // upper bound: up to 16bit per 4x4 block
+ (limit * limit) / (100 * 100); // ... modulated with a quadratic curve.
+
+ enc->thread_level_ = config->thread_level;
+
+ enc->do_search_ = (config->target_size > 0 || config->target_PSNR > 0);
+ if (!config->low_memory) {
+#if !defined(DISABLE_TOKEN_BUFFER)
+ enc->use_tokens_ = (enc->rd_opt_level_ >= RD_OPT_BASIC); // need rd stats
+#endif
+ if (enc->use_tokens_) {
+ enc->num_parts_ = 1; // doesn't work with multi-partition
+ }
+ }
+}
+
+// Memory scaling with dimensions:
+// memory (bytes) ~= 2.25 * w + 0.0625 * w * h
+//
+// Typical memory footprint (614x440 picture)
+// encoder: 22111
+// info: 4368
+// preds: 17741
+// top samples: 1263
+// non-zero: 175
+// lf-stats: 0
+// total: 45658
+// Transient object sizes:
+// VP8EncIterator: 3360
+// VP8ModeScore: 872
+// VP8SegmentInfo: 732
+// VP8Proba: 18352
+// LFStats: 2048
+// Picture size (yuv): 419328
+
+static VP8Encoder* InitVP8Encoder(const WebPConfig* const config,
+ WebPPicture* const picture) {
+ const int use_filter =
+ (config->filter_strength > 0) || (config->autofilter > 0);
+ const int mb_w = (picture->width + 15) >> 4;
+ const int mb_h = (picture->height + 15) >> 4;
+ const int preds_w = 4 * mb_w + 1;
+ const int preds_h = 4 * mb_h + 1;
+ const size_t preds_size = preds_w * preds_h * sizeof(uint8_t);
+ const int top_stride = mb_w * 16;
+ const size_t nz_size = (mb_w + 1) * sizeof(uint32_t) + ALIGN_CST;
+ const size_t info_size = mb_w * mb_h * sizeof(VP8MBInfo);
+ const size_t samples_size = 2 * top_stride * sizeof(uint8_t) // top-luma/u/v
+ + ALIGN_CST; // align all
+ const size_t lf_stats_size =
+ config->autofilter ? sizeof(LFStats) + ALIGN_CST : 0;
+ VP8Encoder* enc;
+ uint8_t* mem;
+ const uint64_t size = (uint64_t)sizeof(VP8Encoder) // main struct
+ + ALIGN_CST // cache alignment
+ + info_size // modes info
+ + preds_size // prediction modes
+ + samples_size // top/left samples
+ + nz_size // coeff context bits
+ + lf_stats_size; // autofilter stats
+
+#ifdef PRINT_MEMORY_INFO
+ printf("===================================\n");
+ printf("Memory used:\n"
+ " encoder: %ld\n"
+ " info: %ld\n"
+ " preds: %ld\n"
+ " top samples: %ld\n"
+ " non-zero: %ld\n"
+ " lf-stats: %ld\n"
+ " total: %ld\n",
+ sizeof(VP8Encoder) + ALIGN_CST, info_size,
+ preds_size, samples_size, nz_size, lf_stats_size, size);
+ printf("Transient object sizes:\n"
+ " VP8EncIterator: %ld\n"
+ " VP8ModeScore: %ld\n"
+ " VP8SegmentInfo: %ld\n"
+ " VP8Proba: %ld\n"
+ " LFStats: %ld\n",
+ sizeof(VP8EncIterator), sizeof(VP8ModeScore),
+ sizeof(VP8SegmentInfo), sizeof(VP8Proba),
+ sizeof(LFStats));
+ printf("Picture size (yuv): %ld\n",
+ mb_w * mb_h * 384 * sizeof(uint8_t));
+ printf("===================================\n");
+#endif
+ mem = (uint8_t*)WebPSafeMalloc(size, sizeof(*mem));
+ if (mem == NULL) {
+ WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY);
+ return NULL;
+ }
+ enc = (VP8Encoder*)mem;
+ mem = (uint8_t*)DO_ALIGN(mem + sizeof(*enc));
+ memset(enc, 0, sizeof(*enc));
+ enc->num_parts_ = 1 << config->partitions;
+ enc->mb_w_ = mb_w;
+ enc->mb_h_ = mb_h;
+ enc->preds_w_ = preds_w;
+ enc->mb_info_ = (VP8MBInfo*)mem;
+ mem += info_size;
+ enc->preds_ = ((uint8_t*)mem) + 1 + enc->preds_w_;
+ mem += preds_w * preds_h * sizeof(uint8_t);
+ enc->nz_ = 1 + (uint32_t*)DO_ALIGN(mem);
+ mem += nz_size;
+ enc->lf_stats_ = lf_stats_size ? (LFStats*)DO_ALIGN(mem) : NULL;
+ mem += lf_stats_size;
+
+ // top samples (all 16-aligned)
+ mem = (uint8_t*)DO_ALIGN(mem);
+ enc->y_top_ = (uint8_t*)mem;
+ enc->uv_top_ = enc->y_top_ + top_stride;
+ mem += 2 * top_stride;
+ assert(mem <= (uint8_t*)enc + size);
+
+ enc->config_ = config;
+ enc->profile_ = use_filter ? ((config->filter_type == 1) ? 0 : 1) : 2;
+ enc->pic_ = picture;
+ enc->percent_ = 0;
+
+ MapConfigToTools(enc);
+ VP8EncDspInit();
+ VP8DefaultProbas(enc);
+ ResetSegmentHeader(enc);
+ ResetFilterHeader(enc);
+ ResetBoundaryPredictions(enc);
+ VP8GetResidualCostInit();
+ VP8SetResidualCoeffsInit();
+ VP8EncInitAlpha(enc);
+
+ // lower quality means smaller output -> we modulate a little the page
+ // size based on quality. This is just a crude 1rst-order prediction.
+ {
+ const float scale = 1.f + config->quality * 5.f / 100.f; // in [1,6]
+ VP8TBufferInit(&enc->tokens_, (int)(mb_w * mb_h * 4 * scale));
+ }
+ return enc;
+}
+
+static int DeleteVP8Encoder(VP8Encoder* enc) {
+ int ok = 1;
+ if (enc != NULL) {
+ ok = VP8EncDeleteAlpha(enc);
+ VP8TBufferClear(&enc->tokens_);
+ WebPSafeFree(enc);
+ }
+ return ok;
+}
+
+//------------------------------------------------------------------------------
+
+static double GetPSNR(uint64_t err, uint64_t size) {
+ return (err > 0 && size > 0) ? 10. * log10(255. * 255. * size / err) : 99.;
+}
+
+static void FinalizePSNR(const VP8Encoder* const enc) {
+ WebPAuxStats* stats = enc->pic_->stats;
+ const uint64_t size = enc->sse_count_;
+ const uint64_t* const sse = enc->sse_;
+ stats->PSNR[0] = (float)GetPSNR(sse[0], size);
+ stats->PSNR[1] = (float)GetPSNR(sse[1], size / 4);
+ stats->PSNR[2] = (float)GetPSNR(sse[2], size / 4);
+ stats->PSNR[3] = (float)GetPSNR(sse[0] + sse[1] + sse[2], size * 3 / 2);
+ stats->PSNR[4] = (float)GetPSNR(sse[3], size);
+}
+
+static void StoreStats(VP8Encoder* const enc) {
+ WebPAuxStats* const stats = enc->pic_->stats;
+ if (stats != NULL) {
+ int i, s;
+ for (i = 0; i < NUM_MB_SEGMENTS; ++i) {
+ stats->segment_level[i] = enc->dqm_[i].fstrength_;
+ stats->segment_quant[i] = enc->dqm_[i].quant_;
+ for (s = 0; s <= 2; ++s) {
+ stats->residual_bytes[s][i] = enc->residual_bytes_[s][i];
+ }
+ }
+ FinalizePSNR(enc);
+ stats->coded_size = enc->coded_size_;
+ for (i = 0; i < 3; ++i) {
+ stats->block_count[i] = enc->block_count_[i];
+ }
+ }
+ WebPReportProgress(enc->pic_, 100, &enc->percent_); // done!
+}
+
+int WebPEncodingSetError(const WebPPicture* const pic,
+ WebPEncodingError error) {
+ assert((int)error < VP8_ENC_ERROR_LAST);
+ assert((int)error >= VP8_ENC_OK);
+ ((WebPPicture*)pic)->error_code = error;
+ return 0;
+}
+
+int WebPReportProgress(const WebPPicture* const pic,
+ int percent, int* const percent_store) {
+ if (percent_store != NULL && percent != *percent_store) {
+ *percent_store = percent;
+ if (pic->progress_hook && !pic->progress_hook(percent, pic)) {
+ // user abort requested
+ WebPEncodingSetError(pic, VP8_ENC_ERROR_USER_ABORT);
+ return 0;
+ }
+ }
+ return 1; // ok
+}
+//------------------------------------------------------------------------------
+
+int WebPEncode(const WebPConfig* config, WebPPicture* pic) {
+ int ok = 0;
+
+ if (pic == NULL)
+ return 0;
+ WebPEncodingSetError(pic, VP8_ENC_OK); // all ok so far
+ if (config == NULL) // bad params
+ return WebPEncodingSetError(pic, VP8_ENC_ERROR_NULL_PARAMETER);
+ if (!WebPValidateConfig(config))
+ return WebPEncodingSetError(pic, VP8_ENC_ERROR_INVALID_CONFIGURATION);
+ if (pic->width <= 0 || pic->height <= 0)
+ return WebPEncodingSetError(pic, VP8_ENC_ERROR_BAD_DIMENSION);
+ if (pic->width > WEBP_MAX_DIMENSION || pic->height > WEBP_MAX_DIMENSION)
+ return WebPEncodingSetError(pic, VP8_ENC_ERROR_BAD_DIMENSION);
+
+ if (pic->stats != NULL) memset(pic->stats, 0, sizeof(*pic->stats));
+
+ if (!config->lossless) {
+ VP8Encoder* enc = NULL;
+ if (pic->y == NULL || pic->u == NULL || pic->v == NULL) {
+ // Make sure we have YUVA samples.
+ if (config->preprocessing & 4) {
+#if WEBP_ENCODER_ABI_VERSION > 0x0204
+ if (!WebPPictureSmartARGBToYUVA(pic)) {
+ return 0;
+ }
+#endif
+ } else {
+ float dithering = 0.f;
+ if (config->preprocessing & 2) {
+ const float x = config->quality / 100.f;
+ const float x2 = x * x;
+ // slowly decreasing from max dithering at low quality (q->0)
+ // to 0.5 dithering amplitude at high quality (q->100)
+ dithering = 1.0f + (0.5f - 1.0f) * x2 * x2;
+ }
+ if (!WebPPictureARGBToYUVADithered(pic, WEBP_YUV420, dithering)) {
+ return 0;
+ }
+ }
+ }
+
+ enc = InitVP8Encoder(config, pic);
+ if (enc == NULL) return 0; // pic->error is already set.
+ // Note: each of the tasks below account for 20% in the progress report.
+ ok = VP8EncAnalyze(enc);
+
+ // Analysis is done, proceed to actual coding.
+ ok = ok && VP8EncStartAlpha(enc); // possibly done in parallel
+ if (!enc->use_tokens_) {
+ ok = ok && VP8EncLoop(enc);
+ } else {
+ ok = ok && VP8EncTokenLoop(enc);
+ }
+ ok = ok && VP8EncFinishAlpha(enc);
+
+ ok = ok && VP8EncWrite(enc);
+ StoreStats(enc);
+ if (!ok) {
+ VP8EncFreeBitWriters(enc);
+ }
+ ok &= DeleteVP8Encoder(enc); // must always be called, even if !ok
+ } else {
+ // Make sure we have ARGB samples.
+ if (pic->argb == NULL && !WebPPictureYUVAToARGB(pic)) {
+ return 0;
+ }
+
+ ok = VP8LEncodeImage(config, pic); // Sets pic->error in case of problem.
+ }
+
+ return ok;
+}