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Diffstat (limited to '')
| -rw-r--r-- | src/main/jni/libwebp/dec/buffer.c | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/src/main/jni/libwebp/dec/buffer.c b/src/main/jni/libwebp/dec/buffer.c deleted file mode 100644 index 42feac74c..000000000 --- a/src/main/jni/libwebp/dec/buffer.c +++ /dev/null @@ -1,251 +0,0 @@ -// 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. -// ----------------------------------------------------------------------------- -// -// Everything about WebPDecBuffer -// -// Author: Skal (pascal.massimino@gmail.com) - -#include <stdlib.h> - -#include "./vp8i.h" -#include "./webpi.h" -#include "../utils/utils.h" - -//------------------------------------------------------------------------------ -// WebPDecBuffer - -// Number of bytes per pixel for the different color-spaces. -static const int kModeBpp[MODE_LAST] = { - 3, 4, 3, 4, 4, 2, 2, - 4, 4, 4, 2, // pre-multiplied modes - 1, 1 }; - -// Check that webp_csp_mode is within the bounds of WEBP_CSP_MODE. -// Convert to an integer to handle both the unsigned/signed enum cases -// without the need for casting to remove type limit warnings. -static int IsValidColorspace(int webp_csp_mode) { - return (webp_csp_mode >= MODE_RGB && webp_csp_mode < MODE_LAST); -} - -static VP8StatusCode CheckDecBuffer(const WebPDecBuffer* const buffer) { - int ok = 1; - const WEBP_CSP_MODE mode = buffer->colorspace; - const int width = buffer->width; - const int height = buffer->height; - if (!IsValidColorspace(mode)) { - ok = 0; - } else if (!WebPIsRGBMode(mode)) { // YUV checks - const WebPYUVABuffer* const buf = &buffer->u.YUVA; - const int y_stride = abs(buf->y_stride); - const int u_stride = abs(buf->u_stride); - const int v_stride = abs(buf->v_stride); - const int a_stride = abs(buf->a_stride); - const uint64_t y_size = (uint64_t)y_stride * height; - const uint64_t u_size = (uint64_t)u_stride * ((height + 1) / 2); - const uint64_t v_size = (uint64_t)v_stride * ((height + 1) / 2); - const uint64_t a_size = (uint64_t)a_stride * height; - ok &= (y_size <= buf->y_size); - ok &= (u_size <= buf->u_size); - ok &= (v_size <= buf->v_size); - ok &= (y_stride >= width); - ok &= (u_stride >= (width + 1) / 2); - ok &= (v_stride >= (width + 1) / 2); - ok &= (buf->y != NULL); - ok &= (buf->u != NULL); - ok &= (buf->v != NULL); - if (mode == MODE_YUVA) { - ok &= (a_stride >= width); - ok &= (a_size <= buf->a_size); - ok &= (buf->a != NULL); - } - } else { // RGB checks - const WebPRGBABuffer* const buf = &buffer->u.RGBA; - const int stride = abs(buf->stride); - const uint64_t size = (uint64_t)stride * height; - ok &= (size <= buf->size); - ok &= (stride >= width * kModeBpp[mode]); - ok &= (buf->rgba != NULL); - } - return ok ? VP8_STATUS_OK : VP8_STATUS_INVALID_PARAM; -} - -static VP8StatusCode AllocateBuffer(WebPDecBuffer* const buffer) { - const int w = buffer->width; - const int h = buffer->height; - const WEBP_CSP_MODE mode = buffer->colorspace; - - if (w <= 0 || h <= 0 || !IsValidColorspace(mode)) { - return VP8_STATUS_INVALID_PARAM; - } - - if (!buffer->is_external_memory && buffer->private_memory == NULL) { - uint8_t* output; - int uv_stride = 0, a_stride = 0; - uint64_t uv_size = 0, a_size = 0, total_size; - // We need memory and it hasn't been allocated yet. - // => initialize output buffer, now that dimensions are known. - const int stride = w * kModeBpp[mode]; - const uint64_t size = (uint64_t)stride * h; - - if (!WebPIsRGBMode(mode)) { - uv_stride = (w + 1) / 2; - uv_size = (uint64_t)uv_stride * ((h + 1) / 2); - if (mode == MODE_YUVA) { - a_stride = w; - a_size = (uint64_t)a_stride * h; - } - } - total_size = size + 2 * uv_size + a_size; - - // Security/sanity checks - output = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*output)); - if (output == NULL) { - return VP8_STATUS_OUT_OF_MEMORY; - } - buffer->private_memory = output; - - if (!WebPIsRGBMode(mode)) { // YUVA initialization - WebPYUVABuffer* const buf = &buffer->u.YUVA; - buf->y = output; - buf->y_stride = stride; - buf->y_size = (size_t)size; - buf->u = output + size; - buf->u_stride = uv_stride; - buf->u_size = (size_t)uv_size; - buf->v = output + size + uv_size; - buf->v_stride = uv_stride; - buf->v_size = (size_t)uv_size; - if (mode == MODE_YUVA) { - buf->a = output + size + 2 * uv_size; - } - buf->a_size = (size_t)a_size; - buf->a_stride = a_stride; - } else { // RGBA initialization - WebPRGBABuffer* const buf = &buffer->u.RGBA; - buf->rgba = output; - buf->stride = stride; - buf->size = (size_t)size; - } - } - return CheckDecBuffer(buffer); -} - -VP8StatusCode WebPFlipBuffer(WebPDecBuffer* const buffer) { - if (buffer == NULL) { - return VP8_STATUS_INVALID_PARAM; - } - if (WebPIsRGBMode(buffer->colorspace)) { - WebPRGBABuffer* const buf = &buffer->u.RGBA; - buf->rgba += (buffer->height - 1) * buf->stride; - buf->stride = -buf->stride; - } else { - WebPYUVABuffer* const buf = &buffer->u.YUVA; - const int H = buffer->height; - buf->y += (H - 1) * buf->y_stride; - buf->y_stride = -buf->y_stride; - buf->u += ((H - 1) >> 1) * buf->u_stride; - buf->u_stride = -buf->u_stride; - buf->v += ((H - 1) >> 1) * buf->v_stride; - buf->v_stride = -buf->v_stride; - if (buf->a != NULL) { - buf->a += (H - 1) * buf->a_stride; - buf->a_stride = -buf->a_stride; - } - } - return VP8_STATUS_OK; -} - -VP8StatusCode WebPAllocateDecBuffer(int w, int h, - const WebPDecoderOptions* const options, - WebPDecBuffer* const out) { - VP8StatusCode status; - if (out == NULL || w <= 0 || h <= 0) { - return VP8_STATUS_INVALID_PARAM; - } - if (options != NULL) { // First, apply options if there is any. - if (options->use_cropping) { - const int cw = options->crop_width; - const int ch = options->crop_height; - const int x = options->crop_left & ~1; - const int y = options->crop_top & ~1; - if (x < 0 || y < 0 || cw <= 0 || ch <= 0 || x + cw > w || y + ch > h) { - return VP8_STATUS_INVALID_PARAM; // out of frame boundary. - } - w = cw; - h = ch; - } - if (options->use_scaling) { - if (options->scaled_width <= 0 || options->scaled_height <= 0) { - return VP8_STATUS_INVALID_PARAM; - } - w = options->scaled_width; - h = options->scaled_height; - } - } - out->width = w; - out->height = h; - - // Then, allocate buffer for real. - status = AllocateBuffer(out); - if (status != VP8_STATUS_OK) return status; - -#if WEBP_DECODER_ABI_VERSION > 0x0203 - // Use the stride trick if vertical flip is needed. - if (options != NULL && options->flip) { - status = WebPFlipBuffer(out); - } -#endif - return status; -} - -//------------------------------------------------------------------------------ -// constructors / destructors - -int WebPInitDecBufferInternal(WebPDecBuffer* buffer, int version) { - if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_DECODER_ABI_VERSION)) { - return 0; // version mismatch - } - if (buffer == NULL) return 0; - memset(buffer, 0, sizeof(*buffer)); - return 1; -} - -void WebPFreeDecBuffer(WebPDecBuffer* buffer) { - if (buffer != NULL) { - if (!buffer->is_external_memory) { - WebPSafeFree(buffer->private_memory); - } - buffer->private_memory = NULL; - } -} - -void WebPCopyDecBuffer(const WebPDecBuffer* const src, - WebPDecBuffer* const dst) { - if (src != NULL && dst != NULL) { - *dst = *src; - if (src->private_memory != NULL) { - dst->is_external_memory = 1; // dst buffer doesn't own the memory. - dst->private_memory = NULL; - } - } -} - -// Copy and transfer ownership from src to dst (beware of parameter order!) -void WebPGrabDecBuffer(WebPDecBuffer* const src, WebPDecBuffer* const dst) { - if (src != NULL && dst != NULL) { - *dst = *src; - if (src->private_memory != NULL) { - src->is_external_memory = 1; // src relinquishes ownership - src->private_memory = NULL; - } - } -} - -//------------------------------------------------------------------------------ - |