679e4abdd5
This is a mostly-working implementation of an extra channel in the bitstream. Configure with --enable-alpha to test. Notable TODOs: - Add extra channel to all mismatch tests, PSNR, SSIM, etc - Configurable subsampling - Variable number of planes (currently always uses all 4) - Loop filtering - Per-plane lossless quantizer - ARNR support This implementation just uses the same contents as the Y channel for the A channel, due to lack of content and general pain in playing back 4 channel content. A later patch will use the actual alpha channel passed in from outside the codec. Change-Id: Ibf81f023b1c570bd84b3064e9b4b8ae52e087592
254 lines
7.0 KiB
C
254 lines
7.0 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "./vpx_config.h"
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#include "vp9/common/vp9_blockd.h"
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#include "vpx_mem/vpx_mem.h"
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#include "vp9/common/vp9_onyxc_int.h"
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#include "vp9/common/vp9_findnearmv.h"
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#include "vp9/common/vp9_entropymode.h"
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#include "vp9/common/vp9_entropymv.h"
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#include "vp9/common/vp9_systemdependent.h"
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void vp9_update_mode_info_border(VP9_COMMON *cpi, MODE_INFO *mi) {
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const int stride = cpi->mode_info_stride;
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int i;
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// Clear down top border row
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vpx_memset(mi, 0, sizeof(MODE_INFO) * stride);
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// Clear left border column
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for (i = 1; i < cpi->mi_rows + 1; i++)
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vpx_memset(&mi[i * stride], 0, sizeof(MODE_INFO));
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}
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void vp9_update_mode_info_in_image(VP9_COMMON *cpi, MODE_INFO *mi) {
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int i, j;
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MODE_INFO *ptr;
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// For each in image mode_info element set the in image flag to 1
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for (i = 0; i < cpi->mi_rows; i++) {
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ptr = mi;
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for (j = 0; j < cpi->mi_cols; j++) {
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ptr->mbmi.mb_in_image = 1;
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ptr++; // Next element in the row
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}
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// Step over border element at start of next row
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mi += cpi->mode_info_stride;
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}
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}
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void vp9_free_frame_buffers(VP9_COMMON *oci) {
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int i;
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for (i = 0; i < NUM_YV12_BUFFERS; i++)
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vp9_free_frame_buffer(&oci->yv12_fb[i]);
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vp9_free_frame_buffer(&oci->temp_scale_frame);
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vp9_free_frame_buffer(&oci->post_proc_buffer);
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vpx_free(oci->mip);
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vpx_free(oci->prev_mip);
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vpx_free(oci->above_seg_context);
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vpx_free(oci->above_context[0]);
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for (i = 0; i < MAX_MB_PLANE; i++)
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oci->above_context[i] = 0;
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oci->mip = 0;
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oci->prev_mip = 0;
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oci->above_seg_context = 0;
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}
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int vp9_alloc_frame_buffers(VP9_COMMON *oci, int width, int height) {
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int i, mi_cols;
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// Our internal buffers are always multiples of 16
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const int aligned_width = multiple16(width);
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const int aligned_height = multiple16(height);
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vp9_free_frame_buffers(oci);
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for (i = 0; i < NUM_YV12_BUFFERS; i++) {
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oci->fb_idx_ref_cnt[i] = 0;
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if (vp9_alloc_frame_buffer(&oci->yv12_fb[i], width, height,
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oci->subsampling_x, oci->subsampling_y,
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VP9BORDERINPIXELS) < 0) {
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vp9_free_frame_buffers(oci);
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return 1;
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}
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}
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oci->new_fb_idx = NUM_YV12_BUFFERS - 1;
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oci->fb_idx_ref_cnt[oci->new_fb_idx] = 1;
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for (i = 0; i < ALLOWED_REFS_PER_FRAME; i++)
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oci->active_ref_idx[i] = i;
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for (i = 0; i < NUM_REF_FRAMES; i++) {
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oci->ref_frame_map[i] = i;
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oci->fb_idx_ref_cnt[i] = 1;
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}
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if (vp9_alloc_frame_buffer(&oci->temp_scale_frame, width, 16,
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oci->subsampling_x, oci->subsampling_y,
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VP9BORDERINPIXELS) < 0) {
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vp9_free_frame_buffers(oci);
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return 1;
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}
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if (vp9_alloc_frame_buffer(&oci->post_proc_buffer, width, height,
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oci->subsampling_x, oci->subsampling_y,
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VP9BORDERINPIXELS) < 0) {
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vp9_free_frame_buffers(oci);
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return 1;
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}
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oci->mb_rows = aligned_height >> 4;
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oci->mi_rows = aligned_height >> LOG2_MI_SIZE;
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oci->mb_cols = aligned_width >> 4;
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oci->mi_cols = aligned_width >> LOG2_MI_SIZE;
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oci->MBs = oci->mb_rows * oci->mb_cols;
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oci->mode_info_stride = oci->mi_cols + 1;
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oci->mip = vpx_calloc(oci->mode_info_stride * (oci->mi_rows + 1),
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sizeof(MODE_INFO));
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if (!oci->mip) {
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vp9_free_frame_buffers(oci);
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return 1;
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}
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oci->mi = oci->mip + oci->mode_info_stride + 1;
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/* allocate memory for last frame MODE_INFO array */
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oci->prev_mip = vpx_calloc(oci->mode_info_stride * (oci->mi_rows + 1),
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sizeof(MODE_INFO));
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if (!oci->prev_mip) {
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vp9_free_frame_buffers(oci);
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return 1;
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}
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oci->prev_mi = oci->prev_mip + oci->mode_info_stride + 1;
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// FIXME(jkoleszar): allocate subsampled arrays for U/V once subsampling
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// information is exposed at this level
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mi_cols = mi_cols_aligned_to_sb(oci);
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# if CONFIG_ALPHA
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// TODO(jkoleszar): Why is this * 2?
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oci->above_context[0] = vpx_calloc(sizeof(ENTROPY_CONTEXT) * 8 * mi_cols, 1);
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#else
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oci->above_context[0] = vpx_calloc(sizeof(ENTROPY_CONTEXT) * 6 * mi_cols, 1);
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#endif
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if (!oci->above_context[0]) {
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vp9_free_frame_buffers(oci);
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return 1;
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}
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for (i = 1; i < MAX_MB_PLANE; i++)
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oci->above_context[i] =
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oci->above_context[0] + i * sizeof(ENTROPY_CONTEXT) * 2 * mi_cols;
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oci->above_seg_context =
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vpx_calloc(sizeof(PARTITION_CONTEXT) * mi_cols, 1);
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if (!oci->above_seg_context) {
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vp9_free_frame_buffers(oci);
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return 1;
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}
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vp9_update_mode_info_border(oci, oci->mip);
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vp9_update_mode_info_in_image(oci, oci->mi);
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return 0;
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}
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void vp9_setup_version(VP9_COMMON *cm) {
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if (cm->version & 0x4) {
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if (!CONFIG_EXPERIMENTAL)
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vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
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"Bitstream was created by an experimental "
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"encoder");
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cm->experimental = 1;
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}
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switch (cm->version & 0x3) {
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case 0:
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cm->no_lpf = 0;
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cm->use_bilinear_mc_filter = 0;
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break;
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case 1:
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cm->no_lpf = 0;
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cm->use_bilinear_mc_filter = 1;
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break;
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case 2:
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case 3:
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cm->no_lpf = 1;
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cm->use_bilinear_mc_filter = 1;
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break;
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}
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}
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void vp9_create_common(VP9_COMMON *oci) {
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vp9_machine_specific_config(oci);
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vp9_init_mbmode_probs(oci);
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vp9_default_bmode_probs(oci->fc.bmode_prob);
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oci->txfm_mode = ONLY_4X4;
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oci->comp_pred_mode = HYBRID_PREDICTION;
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oci->no_lpf = 0;
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oci->use_bilinear_mc_filter = 0;
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oci->clr_type = REG_YUV;
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oci->clamp_type = RECON_CLAMP_REQUIRED;
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// Initialize reference frame sign bias structure to defaults
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vpx_memset(oci->ref_frame_sign_bias, 0, sizeof(oci->ref_frame_sign_bias));
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oci->kf_ymode_probs_update = 0;
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}
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void vp9_remove_common(VP9_COMMON *oci) {
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vp9_free_frame_buffers(oci);
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}
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void vp9_initialize_common() {
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vp9_coef_tree_initialize();
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vp9_entropy_mode_init();
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vp9_entropy_mv_init();
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}
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void vp9_update_frame_size(VP9_COMMON *cm) {
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const int aligned_width = multiple16(cm->width);
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const int aligned_height = multiple16(cm->height);
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cm->mb_rows = aligned_height >> 4;
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cm->mb_cols = aligned_width >> 4;
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cm->mi_rows = aligned_height >> LOG2_MI_SIZE;
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cm->mi_cols = aligned_width >> LOG2_MI_SIZE;
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cm->MBs = cm->mb_rows * cm->mb_cols;
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cm->mode_info_stride = cm->mi_cols + 1;
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cm->mi = cm->mip + cm->mode_info_stride + 1;
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cm->prev_mi = cm->prev_mip + cm->mode_info_stride + 1;
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memset(cm->mip, 0,
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cm->mode_info_stride * (cm->mi_rows + 1) * sizeof(MODE_INFO));
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vp9_update_mode_info_border(cm, cm->mip);
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vp9_update_mode_info_in_image(cm, cm->mi);
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vp9_update_mode_info_border(cm, cm->prev_mip);
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vp9_update_mode_info_in_image(cm, cm->prev_mi);
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}
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