1/*
2 *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include "vp9/encoder/vp9_encodeframe.h"
12#include "vp9/encoder/vp9_encoder.h"
13#include "vp9/encoder/vp9_ethread.h"
14#include "vpx_dsp/vpx_dsp_common.h"
15
16static void accumulate_rd_opt(ThreadData *td, ThreadData *td_t) {
17  int i, j, k, l, m, n;
18
19  for (i = 0; i < REFERENCE_MODES; i++)
20    td->rd_counts.comp_pred_diff[i] += td_t->rd_counts.comp_pred_diff[i];
21
22  for (i = 0; i < SWITCHABLE_FILTER_CONTEXTS; i++)
23    td->rd_counts.filter_diff[i] += td_t->rd_counts.filter_diff[i];
24
25  for (i = 0; i < TX_SIZES; i++)
26    for (j = 0; j < PLANE_TYPES; j++)
27      for (k = 0; k < REF_TYPES; k++)
28        for (l = 0; l < COEF_BANDS; l++)
29          for (m = 0; m < COEFF_CONTEXTS; m++)
30            for (n = 0; n < ENTROPY_TOKENS; n++)
31              td->rd_counts.coef_counts[i][j][k][l][m][n] +=
32                  td_t->rd_counts.coef_counts[i][j][k][l][m][n];
33}
34
35static int enc_worker_hook(EncWorkerData *const thread_data, void *unused) {
36  VP9_COMP *const cpi = thread_data->cpi;
37  const VP9_COMMON *const cm = &cpi->common;
38  const int tile_cols = 1 << cm->log2_tile_cols;
39  const int tile_rows = 1 << cm->log2_tile_rows;
40  int t;
41
42  (void) unused;
43
44  for (t = thread_data->start; t < tile_rows * tile_cols;
45      t += cpi->num_workers) {
46    int tile_row = t / tile_cols;
47    int tile_col = t % tile_cols;
48
49    vp9_encode_tile(cpi, thread_data->td, tile_row, tile_col);
50  }
51
52  return 0;
53}
54
55static int get_max_tile_cols(VP9_COMP *cpi) {
56  const int aligned_width = ALIGN_POWER_OF_TWO(cpi->oxcf.width, MI_SIZE_LOG2);
57  int mi_cols = aligned_width >> MI_SIZE_LOG2;
58  int min_log2_tile_cols, max_log2_tile_cols;
59  int log2_tile_cols;
60
61  vp9_get_tile_n_bits(mi_cols, &min_log2_tile_cols, &max_log2_tile_cols);
62  log2_tile_cols = clamp(cpi->oxcf.tile_columns,
63                   min_log2_tile_cols, max_log2_tile_cols);
64  return (1 << log2_tile_cols);
65}
66
67void vp9_encode_tiles_mt(VP9_COMP *cpi) {
68  VP9_COMMON *const cm = &cpi->common;
69  const int tile_cols = 1 << cm->log2_tile_cols;
70  const VPxWorkerInterface *const winterface = vpx_get_worker_interface();
71  const int num_workers = VPXMIN(cpi->oxcf.max_threads, tile_cols);
72  int i;
73
74  vp9_init_tile_data(cpi);
75
76  // Only run once to create threads and allocate thread data.
77  if (cpi->num_workers == 0) {
78    int allocated_workers = num_workers;
79
80    // While using SVC, we need to allocate threads according to the highest
81    // resolution.
82    if (cpi->use_svc) {
83      int max_tile_cols = get_max_tile_cols(cpi);
84      allocated_workers = VPXMIN(cpi->oxcf.max_threads, max_tile_cols);
85    }
86
87    CHECK_MEM_ERROR(cm, cpi->workers,
88                    vpx_malloc(allocated_workers * sizeof(*cpi->workers)));
89
90    CHECK_MEM_ERROR(cm, cpi->tile_thr_data,
91                    vpx_calloc(allocated_workers,
92                    sizeof(*cpi->tile_thr_data)));
93
94    for (i = 0; i < allocated_workers; i++) {
95      VPxWorker *const worker = &cpi->workers[i];
96      EncWorkerData *thread_data = &cpi->tile_thr_data[i];
97
98      ++cpi->num_workers;
99      winterface->init(worker);
100
101      if (i < allocated_workers - 1) {
102        thread_data->cpi = cpi;
103
104        // Allocate thread data.
105        CHECK_MEM_ERROR(cm, thread_data->td,
106                        vpx_memalign(32, sizeof(*thread_data->td)));
107        vp9_zero(*thread_data->td);
108
109        // Set up pc_tree.
110        thread_data->td->leaf_tree = NULL;
111        thread_data->td->pc_tree = NULL;
112        vp9_setup_pc_tree(cm, thread_data->td);
113
114        // Allocate frame counters in thread data.
115        CHECK_MEM_ERROR(cm, thread_data->td->counts,
116                        vpx_calloc(1, sizeof(*thread_data->td->counts)));
117
118        // Create threads
119        if (!winterface->reset(worker))
120          vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
121                             "Tile encoder thread creation failed");
122      } else {
123        // Main thread acts as a worker and uses the thread data in cpi.
124        thread_data->cpi = cpi;
125        thread_data->td = &cpi->td;
126      }
127
128      winterface->sync(worker);
129    }
130  }
131
132  for (i = 0; i < num_workers; i++) {
133    VPxWorker *const worker = &cpi->workers[i];
134    EncWorkerData *thread_data;
135
136    worker->hook = (VPxWorkerHook)enc_worker_hook;
137    worker->data1 = &cpi->tile_thr_data[i];
138    worker->data2 = NULL;
139    thread_data = (EncWorkerData*)worker->data1;
140
141    // Before encoding a frame, copy the thread data from cpi.
142    if (thread_data->td != &cpi->td) {
143      thread_data->td->mb = cpi->td.mb;
144      thread_data->td->rd_counts = cpi->td.rd_counts;
145    }
146    if (thread_data->td->counts != &cpi->common.counts) {
147      memcpy(thread_data->td->counts, &cpi->common.counts,
148             sizeof(cpi->common.counts));
149    }
150
151    // Handle use_nonrd_pick_mode case.
152    if (cpi->sf.use_nonrd_pick_mode) {
153      MACROBLOCK *const x = &thread_data->td->mb;
154      MACROBLOCKD *const xd = &x->e_mbd;
155      struct macroblock_plane *const p = x->plane;
156      struct macroblockd_plane *const pd = xd->plane;
157      PICK_MODE_CONTEXT *ctx = &thread_data->td->pc_root->none;
158      int j;
159
160      for (j = 0; j < MAX_MB_PLANE; ++j) {
161        p[j].coeff = ctx->coeff_pbuf[j][0];
162        p[j].qcoeff = ctx->qcoeff_pbuf[j][0];
163        pd[j].dqcoeff = ctx->dqcoeff_pbuf[j][0];
164        p[j].eobs = ctx->eobs_pbuf[j][0];
165      }
166    }
167  }
168
169  // Encode a frame
170  for (i = 0; i < num_workers; i++) {
171    VPxWorker *const worker = &cpi->workers[i];
172    EncWorkerData *const thread_data = (EncWorkerData*)worker->data1;
173
174    // Set the starting tile for each thread.
175    thread_data->start = i;
176
177    if (i == cpi->num_workers - 1)
178      winterface->execute(worker);
179    else
180      winterface->launch(worker);
181  }
182
183  // Encoding ends.
184  for (i = 0; i < num_workers; i++) {
185    VPxWorker *const worker = &cpi->workers[i];
186    winterface->sync(worker);
187  }
188
189  for (i = 0; i < num_workers; i++) {
190    VPxWorker *const worker = &cpi->workers[i];
191    EncWorkerData *const thread_data = (EncWorkerData*)worker->data1;
192
193    // Accumulate counters.
194    if (i < cpi->num_workers - 1) {
195      vp9_accumulate_frame_counts(&cm->counts, thread_data->td->counts, 0);
196      accumulate_rd_opt(&cpi->td, thread_data->td);
197    }
198  }
199}
200