From 6c43219a5f88f9709ce04a10105421c92982ee09 Mon Sep 17 00:00:00 2001 From: Vincent Rabaud Date: Mon, 16 May 2022 17:33:49 +0200 Subject: [PATCH 1/2] Some renamings for consistency. - pic->picture in public header - match implementation to declaration in PictureImport, WebPPictureRescale, WebpBlendAlpha Change-Id: Ibf3771af22d671bba6fd657684add618c6f32978 --- src/enc/picture_csp_enc.c | 24 +++++++++--------- src/enc/picture_rescale_enc.c | 47 ++++++++++++++++------------------- src/enc/picture_tools_enc.c | 45 +++++++++++++++++---------------- src/webp/encode.h | 4 +-- 4 files changed, 59 insertions(+), 61 deletions(-) diff --git a/src/enc/picture_csp_enc.c b/src/enc/picture_csp_enc.c index 0e94d2df..d801bed7 100644 --- a/src/enc/picture_csp_enc.c +++ b/src/enc/picture_csp_enc.c @@ -798,24 +798,24 @@ static int Import(WebPPicture* const picture, #if !defined(WEBP_REDUCE_CSP) int WebPPictureImportBGR(WebPPicture* picture, - const uint8_t* rgb, int rgb_stride) { - return (picture != NULL && rgb != NULL) - ? Import(picture, rgb, rgb_stride, 3, 1, 0) + const uint8_t* bgr, int bgr_stride) { + return (picture != NULL && bgr != NULL) + ? Import(picture, bgr, bgr_stride, 3, 1, 0) : 0; } int WebPPictureImportBGRA(WebPPicture* picture, - const uint8_t* rgba, int rgba_stride) { - return (picture != NULL && rgba != NULL) - ? Import(picture, rgba, rgba_stride, 4, 1, 1) + const uint8_t* bgra, int bgra_stride) { + return (picture != NULL && bgra != NULL) + ? Import(picture, bgra, bgra_stride, 4, 1, 1) : 0; } int WebPPictureImportBGRX(WebPPicture* picture, - const uint8_t* rgba, int rgba_stride) { - return (picture != NULL && rgba != NULL) - ? Import(picture, rgba, rgba_stride, 4, 1, 0) + const uint8_t* bgrx, int bgrx_stride) { + return (picture != NULL && bgrx != NULL) + ? Import(picture, bgrx, bgrx_stride, 4, 1, 0) : 0; } @@ -836,9 +836,9 @@ int WebPPictureImportRGBA(WebPPicture* picture, } int WebPPictureImportRGBX(WebPPicture* picture, - const uint8_t* rgba, int rgba_stride) { - return (picture != NULL && rgba != NULL) - ? Import(picture, rgba, rgba_stride, 4, 0, 0) + const uint8_t* rgbx, int rgbx_stride) { + return (picture != NULL && rgbx != NULL) + ? Import(picture, rgbx, rgbx_stride, 4, 0, 0) : 0; } diff --git a/src/enc/picture_rescale_enc.c b/src/enc/picture_rescale_enc.c index a75f5d9c..21634f3d 100644 --- a/src/enc/picture_rescale_enc.c +++ b/src/enc/picture_rescale_enc.c @@ -198,34 +198,34 @@ static void AlphaMultiplyY(WebPPicture* const pic, int inverse) { } } -int WebPPictureRescale(WebPPicture* pic, int width, int height) { +int WebPPictureRescale(WebPPicture* picture, int width, int height) { WebPPicture tmp; int prev_width, prev_height; rescaler_t* work; - if (pic == NULL) return 0; - prev_width = pic->width; - prev_height = pic->height; + if (picture == NULL) return 0; + prev_width = picture->width; + prev_height = picture->height; if (!WebPRescalerGetScaledDimensions( prev_width, prev_height, &width, &height)) { return 0; } - PictureGrabSpecs(pic, &tmp); + PictureGrabSpecs(picture, &tmp); tmp.width = width; tmp.height = height; if (!WebPPictureAlloc(&tmp)) return 0; - if (!pic->use_argb) { + if (!picture->use_argb) { work = (rescaler_t*)WebPSafeMalloc(2ULL * width, sizeof(*work)); if (work == NULL) { WebPPictureFree(&tmp); return 0; } // If present, we need to rescale alpha first (for AlphaMultiplyY). - if (pic->a != NULL) { + if (picture->a != NULL) { WebPInitAlphaProcessing(); - if (!RescalePlane(pic->a, prev_width, prev_height, pic->a_stride, + if (!RescalePlane(picture->a, prev_width, prev_height, picture->a_stride, tmp.a, width, height, tmp.a_stride, work, 1)) { return 0; } @@ -233,17 +233,15 @@ int WebPPictureRescale(WebPPicture* pic, int width, int height) { // We take transparency into account on the luma plane only. That's not // totally exact blending, but still is a good approximation. - AlphaMultiplyY(pic, 0); - if (!RescalePlane(pic->y, prev_width, prev_height, pic->y_stride, + AlphaMultiplyY(picture, 0); + if (!RescalePlane(picture->y, prev_width, prev_height, picture->y_stride, tmp.y, width, height, tmp.y_stride, work, 1) || - !RescalePlane(pic->u, - HALVE(prev_width), HALVE(prev_height), pic->uv_stride, - tmp.u, - HALVE(width), HALVE(height), tmp.uv_stride, work, 1) || - !RescalePlane(pic->v, - HALVE(prev_width), HALVE(prev_height), pic->uv_stride, - tmp.v, - HALVE(width), HALVE(height), tmp.uv_stride, work, 1)) { + !RescalePlane(picture->u, HALVE(prev_width), HALVE(prev_height), + picture->uv_stride, tmp.u, HALVE(width), HALVE(height), + tmp.uv_stride, work, 1) || + !RescalePlane(picture->v, HALVE(prev_width), HALVE(prev_height), + picture->uv_stride, tmp.v, HALVE(width), HALVE(height), + tmp.uv_stride, work, 1)) { return 0; } AlphaMultiplyY(&tmp, 1); @@ -257,18 +255,17 @@ int WebPPictureRescale(WebPPicture* pic, int width, int height) { // weighting first (black-matting), scale the RGB values, and remove // the premultiplication afterward (while preserving the alpha channel). WebPInitAlphaProcessing(); - AlphaMultiplyARGB(pic, 0); - if (!RescalePlane((const uint8_t*)pic->argb, prev_width, prev_height, - pic->argb_stride * 4, - (uint8_t*)tmp.argb, width, height, - tmp.argb_stride * 4, work, 4)) { + AlphaMultiplyARGB(picture, 0); + if (!RescalePlane((const uint8_t*)picture->argb, prev_width, prev_height, + picture->argb_stride * 4, (uint8_t*)tmp.argb, width, + height, tmp.argb_stride * 4, work, 4)) { return 0; } AlphaMultiplyARGB(&tmp, 1); } - WebPPictureFree(pic); + WebPPictureFree(picture); WebPSafeFree(work); - *pic = tmp; + *picture = tmp; return 1; } diff --git a/src/enc/picture_tools_enc.c b/src/enc/picture_tools_enc.c index 38cb0153..147cc186 100644 --- a/src/enc/picture_tools_enc.c +++ b/src/enc/picture_tools_enc.c @@ -190,27 +190,28 @@ static WEBP_INLINE uint32_t MakeARGB32(int r, int g, int b) { return (0xff000000u | (r << 16) | (g << 8) | b); } -void WebPBlendAlpha(WebPPicture* pic, uint32_t background_rgb) { +void WebPBlendAlpha(WebPPicture* picture, uint32_t background_rgb) { const int red = (background_rgb >> 16) & 0xff; const int green = (background_rgb >> 8) & 0xff; const int blue = (background_rgb >> 0) & 0xff; int x, y; - if (pic == NULL) return; - if (!pic->use_argb) { - const int uv_width = (pic->width >> 1); // omit last pixel during u/v loop + if (picture == NULL) return; + if (!picture->use_argb) { + // omit last pixel during u/v loop + const int uv_width = (picture->width >> 1); const int Y0 = VP8RGBToY(red, green, blue, YUV_HALF); // VP8RGBToU/V expects the u/v values summed over four pixels const int U0 = VP8RGBToU(4 * red, 4 * green, 4 * blue, 4 * YUV_HALF); const int V0 = VP8RGBToV(4 * red, 4 * green, 4 * blue, 4 * YUV_HALF); - const int has_alpha = pic->colorspace & WEBP_CSP_ALPHA_BIT; - uint8_t* y_ptr = pic->y; - uint8_t* u_ptr = pic->u; - uint8_t* v_ptr = pic->v; - uint8_t* a_ptr = pic->a; + const int has_alpha = picture->colorspace & WEBP_CSP_ALPHA_BIT; + uint8_t* y_ptr = picture->y; + uint8_t* u_ptr = picture->u; + uint8_t* v_ptr = picture->v; + uint8_t* a_ptr = picture->a; if (!has_alpha || a_ptr == NULL) return; // nothing to do - for (y = 0; y < pic->height; ++y) { + for (y = 0; y < picture->height; ++y) { // Luma blending - for (x = 0; x < pic->width; ++x) { + for (x = 0; x < picture->width; ++x) { const uint8_t alpha = a_ptr[x]; if (alpha < 0xff) { y_ptr[x] = BLEND(Y0, y_ptr[x], alpha); @@ -219,7 +220,7 @@ void WebPBlendAlpha(WebPPicture* pic, uint32_t background_rgb) { // Chroma blending every even line if ((y & 1) == 0) { uint8_t* const a_ptr2 = - (y + 1 == pic->height) ? a_ptr : a_ptr + pic->a_stride; + (y + 1 == picture->height) ? a_ptr : a_ptr + picture->a_stride; for (x = 0; x < uv_width; ++x) { // Average four alpha values into a single blending weight. // TODO(skal): might lead to visible contouring. Can we do better? @@ -229,24 +230,24 @@ void WebPBlendAlpha(WebPPicture* pic, uint32_t background_rgb) { u_ptr[x] = BLEND_10BIT(U0, u_ptr[x], alpha); v_ptr[x] = BLEND_10BIT(V0, v_ptr[x], alpha); } - if (pic->width & 1) { // rightmost pixel + if (picture->width & 1) { // rightmost pixel const uint32_t alpha = 2 * (a_ptr[2 * x + 0] + a_ptr2[2 * x + 0]); u_ptr[x] = BLEND_10BIT(U0, u_ptr[x], alpha); v_ptr[x] = BLEND_10BIT(V0, v_ptr[x], alpha); } } else { - u_ptr += pic->uv_stride; - v_ptr += pic->uv_stride; + u_ptr += picture->uv_stride; + v_ptr += picture->uv_stride; } - memset(a_ptr, 0xff, pic->width); // reset alpha value to opaque - a_ptr += pic->a_stride; - y_ptr += pic->y_stride; + memset(a_ptr, 0xff, picture->width); // reset alpha value to opaque + a_ptr += picture->a_stride; + y_ptr += picture->y_stride; } } else { - uint32_t* argb = pic->argb; + uint32_t* argb = picture->argb; const uint32_t background = MakeARGB32(red, green, blue); - for (y = 0; y < pic->height; ++y) { - for (x = 0; x < pic->width; ++x) { + for (y = 0; y < picture->height; ++y) { + for (x = 0; x < picture->width; ++x) { const int alpha = (argb[x] >> 24) & 0xff; if (alpha != 0xff) { if (alpha > 0) { @@ -262,7 +263,7 @@ void WebPBlendAlpha(WebPPicture* pic, uint32_t background_rgb) { } } } - argb += pic->argb_stride; + argb += picture->argb_stride; } } } diff --git a/src/webp/encode.h b/src/webp/encode.h index cbce4487..56b68e2f 100644 --- a/src/webp/encode.h +++ b/src/webp/encode.h @@ -455,7 +455,7 @@ WEBP_EXTERN int WebPPictureIsView(const WebPPicture* picture); // dimension will be calculated preserving the aspect ratio. // No gamma correction is applied. // Returns false in case of error (invalid parameter or insufficient memory). -WEBP_EXTERN int WebPPictureRescale(WebPPicture* pic, int width, int height); +WEBP_EXTERN int WebPPictureRescale(WebPPicture* picture, int width, int height); // Colorspace conversion function to import RGB samples. // Previous buffer will be free'd, if any. @@ -526,7 +526,7 @@ WEBP_EXTERN int WebPPictureHasTransparency(const WebPPicture* picture); // Remove the transparency information (if present) by blending the color with // the background color 'background_rgb' (specified as 24bit RGB triplet). // After this call, all alpha values are reset to 0xff. -WEBP_EXTERN void WebPBlendAlpha(WebPPicture* pic, uint32_t background_rgb); +WEBP_EXTERN void WebPBlendAlpha(WebPPicture* picture, uint32_t background_rgb); //------------------------------------------------------------------------------ // Main call From 30453ea4e6d9c5ec601c00e89c5a025d51c0eb95 Mon Sep 17 00:00:00 2001 From: Vincent Rabaud Date: Mon, 16 May 2022 17:37:20 +0200 Subject: [PATCH 2/2] Add an internal WebPValidatePicture. Change-Id: Ia01bd3975f7bd0d47eb0a1764807baed16f0d268 --- src/enc/picture_csp_enc.c | 4 ++-- src/enc/picture_enc.c | 44 +++++++++++++++++++++++---------------- src/enc/vp8i_enc.h | 19 ++++++++++------- src/enc/webp_enc.c | 4 +--- 4 files changed, 41 insertions(+), 30 deletions(-) diff --git a/src/enc/picture_csp_enc.c b/src/enc/picture_csp_enc.c index d801bed7..08826331 100644 --- a/src/enc/picture_csp_enc.c +++ b/src/enc/picture_csp_enc.c @@ -496,7 +496,7 @@ static int ImportYUVAFromRGBA(const uint8_t* r_ptr, use_iterative_conversion = 0; } - if (!WebPPictureAllocYUVA(picture, width, height)) { + if (!WebPPictureAllocYUVA(picture)) { return 0; } if (has_alpha) { @@ -677,7 +677,7 @@ int WebPPictureYUVAToARGB(WebPPicture* picture) { return WebPEncodingSetError(picture, VP8_ENC_ERROR_INVALID_CONFIGURATION); } // Allocate a new argb buffer (discarding the previous one). - if (!WebPPictureAllocARGB(picture, picture->width, picture->height)) return 0; + if (!WebPPictureAllocARGB(picture)) return 0; picture->use_argb = 1; // Convert diff --git a/src/enc/picture_enc.c b/src/enc/picture_enc.c index c691622d..3af6383d 100644 --- a/src/enc/picture_enc.c +++ b/src/enc/picture_enc.c @@ -45,6 +45,22 @@ int WebPPictureInitInternal(WebPPicture* picture, int version) { //------------------------------------------------------------------------------ +int WebPValidatePicture(const WebPPicture* const picture) { + if (picture == NULL) return 0; + if (picture->width <= 0 || picture->height <= 0) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_BAD_DIMENSION); + } + if (picture->width <= 0 || picture->width / 4 > INT_MAX / 4 || + picture->height <= 0 || picture->height / 4 > INT_MAX / 4) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_BAD_DIMENSION); + } + if (picture->colorspace != WEBP_YUV420 && + picture->colorspace != WEBP_YUV420A) { + return WebPEncodingSetError(picture, VP8_ENC_ERROR_INVALID_CONFIGURATION); + } + return 1; +} + static void WebPPictureResetBufferARGB(WebPPicture* const picture) { picture->memory_argb_ = NULL; picture->argb = NULL; @@ -63,18 +79,17 @@ void WebPPictureResetBuffers(WebPPicture* const picture) { WebPPictureResetBufferYUVA(picture); } -int WebPPictureAllocARGB(WebPPicture* const picture, int width, int height) { +int WebPPictureAllocARGB(WebPPicture* const picture) { void* memory; + const int width = picture->width; + const int height = picture->height; const uint64_t argb_size = (uint64_t)width * height; - assert(picture != NULL); + if (!WebPValidatePicture(picture)) return 0; WebPSafeFree(picture->memory_argb_); WebPPictureResetBufferARGB(picture); - if (width <= 0 || height <= 0) { - return WebPEncodingSetError(picture, VP8_ENC_ERROR_BAD_DIMENSION); - } // allocate a new buffer. memory = WebPSafeMalloc(argb_size + WEBP_ALIGN_CST, sizeof(*picture->argb)); if (memory == NULL) { @@ -86,10 +101,10 @@ int WebPPictureAllocARGB(WebPPicture* const picture, int width, int height) { return 1; } -int WebPPictureAllocYUVA(WebPPicture* const picture, int width, int height) { - const WebPEncCSP uv_csp = - (WebPEncCSP)((int)picture->colorspace & WEBP_CSP_UV_MASK); +int WebPPictureAllocYUVA(WebPPicture* const picture) { const int has_alpha = (int)picture->colorspace & WEBP_CSP_ALPHA_BIT; + const int width = picture->width; + const int height = picture->height; const int y_stride = width; const int uv_width = (int)(((int64_t)width + 1) >> 1); const int uv_height = (int)(((int64_t)height + 1) >> 1); @@ -98,15 +113,11 @@ int WebPPictureAllocYUVA(WebPPicture* const picture, int width, int height) { uint64_t y_size, uv_size, a_size, total_size; uint8_t* mem; - assert(picture != NULL); + if (!WebPValidatePicture(picture)) return 0; WebPSafeFree(picture->memory_); WebPPictureResetBufferYUVA(picture); - if (uv_csp != WEBP_YUV420) { - return WebPEncodingSetError(picture, VP8_ENC_ERROR_INVALID_CONFIGURATION); - } - // alpha a_width = has_alpha ? width : 0; a_stride = a_width; @@ -152,15 +163,12 @@ int WebPPictureAllocYUVA(WebPPicture* const picture, int width, int height) { int WebPPictureAlloc(WebPPicture* picture) { if (picture != NULL) { - const int width = picture->width; - const int height = picture->height; - WebPPictureFree(picture); // erase previous buffer if (!picture->use_argb) { - return WebPPictureAllocYUVA(picture, width, height); + return WebPPictureAllocYUVA(picture); } else { - return WebPPictureAllocARGB(picture, width, height); + return WebPPictureAllocARGB(picture); } } return 1; diff --git a/src/enc/vp8i_enc.h b/src/enc/vp8i_enc.h index ad3be224..2ef3bc7f 100644 --- a/src/enc/vp8i_enc.h +++ b/src/enc/vp8i_enc.h @@ -491,19 +491,24 @@ int VP8FilterStrengthFromDelta(int sharpness, int delta); // misc utils for picture_*.c: +// Returns true if 'picture' is non-NULL and dimensions/colorspace are within +// their valid ranges. If returning false, the 'error_code' in 'picture' is +// updated. +int WebPValidatePicture(const WebPPicture* picture); + // Remove reference to the ARGB/YUVA buffer (doesn't free anything). void WebPPictureResetBuffers(WebPPicture* const picture); -// Allocates ARGB buffer of given dimension (previous one is always free'd). -// Preserves the YUV(A) buffer. Returns false in case of error (invalid param, -// out-of-memory). -int WebPPictureAllocARGB(WebPPicture* const picture, int width, int height); +// Allocates ARGB buffer according to set width/height (previous one is +// always free'd). Preserves the YUV(A) buffer. Returns false in case of error +// (invalid param, out-of-memory). +int WebPPictureAllocARGB(WebPPicture* const picture); -// Allocates YUVA buffer of given dimension (previous one is always free'd). -// Uses picture->csp to determine whether an alpha buffer is needed. +// Allocates YUVA buffer according to set width/height (previous one is always +// free'd). Uses picture->csp to determine whether an alpha buffer is needed. // Preserves the ARGB buffer. // Returns false in case of error (invalid param, out-of-memory). -int WebPPictureAllocYUVA(WebPPicture* const picture, int width, int height); +int WebPPictureAllocYUVA(WebPPicture* const picture); // Replace samples that are fully transparent by 'color' to help compressibility // (no guarantee, though). Assumes pic->use_argb is true. diff --git a/src/enc/webp_enc.c b/src/enc/webp_enc.c index ce2db2e9..9620e050 100644 --- a/src/enc/webp_enc.c +++ b/src/enc/webp_enc.c @@ -336,9 +336,7 @@ int WebPEncode(const WebPConfig* config, WebPPicture* pic) { 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 (!WebPValidatePicture(pic)) return 0; if (pic->width > WEBP_MAX_DIMENSION || pic->height > WEBP_MAX_DIMENSION) { return WebPEncodingSetError(pic, VP8_ENC_ERROR_BAD_DIMENSION); }