summaryrefslogtreecommitdiff
path: root/drivers/webpold/dec/io.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/webpold/dec/io.c')
-rw-r--r--drivers/webpold/dec/io.c633
1 files changed, 0 insertions, 633 deletions
diff --git a/drivers/webpold/dec/io.c b/drivers/webpold/dec/io.c
deleted file mode 100644
index 594804c2e6..0000000000
--- a/drivers/webpold/dec/io.c
+++ /dev/null
@@ -1,633 +0,0 @@
-// Copyright 2011 Google Inc. All Rights Reserved.
-//
-// This code is licensed under the same terms as WebM:
-// Software License Agreement: http://www.webmproject.org/license/software/
-// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
-// -----------------------------------------------------------------------------
-//
-// functions for sample output.
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#include <assert.h>
-#include <stdlib.h>
-#include "../dec/vp8i.h"
-#include "./webpi.h"
-#include "../dsp/dsp.h"
-#include "../dsp/yuv.h"
-
-#if defined(__cplusplus) || defined(c_plusplus)
-extern "C" {
-#endif
-
-//------------------------------------------------------------------------------
-// Main YUV<->RGB conversion functions
-
-static int EmitYUV(const VP8Io* const io, WebPDecParams* const p) {
- WebPDecBuffer* output = p->output;
- const WebPYUVABuffer* const buf = &output->u.YUVA;
- uint8_t* const y_dst = buf->y + io->mb_y * buf->y_stride;
- uint8_t* const u_dst = buf->u + (io->mb_y >> 1) * buf->u_stride;
- uint8_t* const v_dst = buf->v + (io->mb_y >> 1) * buf->v_stride;
- const int mb_w = io->mb_w;
- const int mb_h = io->mb_h;
- const int uv_w = (mb_w + 1) / 2;
- const int uv_h = (mb_h + 1) / 2;
- int j;
- for (j = 0; j < mb_h; ++j) {
- memcpy(y_dst + j * buf->y_stride, io->y + j * io->y_stride, mb_w);
- }
- for (j = 0; j < uv_h; ++j) {
- memcpy(u_dst + j * buf->u_stride, io->u + j * io->uv_stride, uv_w);
- memcpy(v_dst + j * buf->v_stride, io->v + j * io->uv_stride, uv_w);
- }
- return io->mb_h;
-}
-
-// Point-sampling U/V sampler.
-static int EmitSampledRGB(const VP8Io* const io, WebPDecParams* const p) {
- WebPDecBuffer* output = p->output;
- const WebPRGBABuffer* const buf = &output->u.RGBA;
- uint8_t* dst = buf->rgba + io->mb_y * buf->stride;
- const uint8_t* y_src = io->y;
- const uint8_t* u_src = io->u;
- const uint8_t* v_src = io->v;
- const WebPSampleLinePairFunc sample = WebPSamplers[output->colorspace];
- const int mb_w = io->mb_w;
- const int last = io->mb_h - 1;
- int j;
- for (j = 0; j < last; j += 2) {
- sample(y_src, y_src + io->y_stride, u_src, v_src,
- dst, dst + buf->stride, mb_w);
- y_src += 2 * io->y_stride;
- u_src += io->uv_stride;
- v_src += io->uv_stride;
- dst += 2 * buf->stride;
- }
- if (j == last) { // Just do the last line twice
- sample(y_src, y_src, u_src, v_src, dst, dst, mb_w);
- }
- return io->mb_h;
-}
-
-//------------------------------------------------------------------------------
-// YUV444 -> RGB conversion
-
-#if 0 // TODO(skal): this is for future rescaling.
-static int EmitRGB(const VP8Io* const io, WebPDecParams* const p) {
- WebPDecBuffer* output = p->output;
- const WebPRGBABuffer* const buf = &output->u.RGBA;
- uint8_t* dst = buf->rgba + io->mb_y * buf->stride;
- const uint8_t* y_src = io->y;
- const uint8_t* u_src = io->u;
- const uint8_t* v_src = io->v;
- const WebPYUV444Converter convert = WebPYUV444Converters[output->colorspace];
- const int mb_w = io->mb_w;
- const int last = io->mb_h;
- int j;
- for (j = 0; j < last; ++j) {
- convert(y_src, u_src, v_src, dst, mb_w);
- y_src += io->y_stride;
- u_src += io->uv_stride;
- v_src += io->uv_stride;
- dst += buf->stride;
- }
- return io->mb_h;
-}
-#endif
-
-//------------------------------------------------------------------------------
-// Fancy upsampling
-
-#ifdef FANCY_UPSAMPLING
-static int EmitFancyRGB(const VP8Io* const io, WebPDecParams* const p) {
- int num_lines_out = io->mb_h; // a priori guess
- const WebPRGBABuffer* const buf = &p->output->u.RGBA;
- uint8_t* dst = buf->rgba + io->mb_y * buf->stride;
- WebPUpsampleLinePairFunc upsample = WebPUpsamplers[p->output->colorspace];
- const uint8_t* cur_y = io->y;
- const uint8_t* cur_u = io->u;
- const uint8_t* cur_v = io->v;
- const uint8_t* top_u = p->tmp_u;
- const uint8_t* top_v = p->tmp_v;
- int y = io->mb_y;
- const int y_end = io->mb_y + io->mb_h;
- const int mb_w = io->mb_w;
- const int uv_w = (mb_w + 1) / 2;
-
- if (y == 0) {
- // First line is special cased. We mirror the u/v samples at boundary.
- upsample(NULL, cur_y, cur_u, cur_v, cur_u, cur_v, NULL, dst, mb_w);
- } else {
- // We can finish the left-over line from previous call.
- upsample(p->tmp_y, cur_y, top_u, top_v, cur_u, cur_v,
- dst - buf->stride, dst, mb_w);
- ++num_lines_out;
- }
- // Loop over each output pairs of row.
- for (; y + 2 < y_end; y += 2) {
- top_u = cur_u;
- top_v = cur_v;
- cur_u += io->uv_stride;
- cur_v += io->uv_stride;
- dst += 2 * buf->stride;
- cur_y += 2 * io->y_stride;
- upsample(cur_y - io->y_stride, cur_y,
- top_u, top_v, cur_u, cur_v,
- dst - buf->stride, dst, mb_w);
- }
- // move to last row
- cur_y += io->y_stride;
- if (io->crop_top + y_end < io->crop_bottom) {
- // Save the unfinished samples for next call (as we're not done yet).
- memcpy(p->tmp_y, cur_y, mb_w * sizeof(*p->tmp_y));
- memcpy(p->tmp_u, cur_u, uv_w * sizeof(*p->tmp_u));
- memcpy(p->tmp_v, cur_v, uv_w * sizeof(*p->tmp_v));
- // The fancy upsampler leaves a row unfinished behind
- // (except for the very last row)
- num_lines_out--;
- } else {
- // Process the very last row of even-sized picture
- if (!(y_end & 1)) {
- upsample(cur_y, NULL, cur_u, cur_v, cur_u, cur_v,
- dst + buf->stride, NULL, mb_w);
- }
- }
- return num_lines_out;
-}
-
-#endif /* FANCY_UPSAMPLING */
-
-//------------------------------------------------------------------------------
-
-static int EmitAlphaYUV(const VP8Io* const io, WebPDecParams* const p) {
- const uint8_t* alpha = io->a;
- const WebPYUVABuffer* const buf = &p->output->u.YUVA;
- const int mb_w = io->mb_w;
- const int mb_h = io->mb_h;
- uint8_t* dst = buf->a + io->mb_y * buf->a_stride;
- int j;
-
- if (alpha != NULL) {
- for (j = 0; j < mb_h; ++j) {
- memcpy(dst, alpha, mb_w * sizeof(*dst));
- alpha += io->width;
- dst += buf->a_stride;
- }
- } else if (buf->a != NULL) {
- // the user requested alpha, but there is none, set it to opaque.
- for (j = 0; j < mb_h; ++j) {
- memset(dst, 0xff, mb_w * sizeof(*dst));
- dst += buf->a_stride;
- }
- }
- return 0;
-}
-
-static int GetAlphaSourceRow(const VP8Io* const io,
- const uint8_t** alpha, int* const num_rows) {
- int start_y = io->mb_y;
- *num_rows = io->mb_h;
-
- // Compensate for the 1-line delay of the fancy upscaler.
- // This is similar to EmitFancyRGB().
- if (io->fancy_upsampling) {
- if (start_y == 0) {
- // We don't process the last row yet. It'll be done during the next call.
- --*num_rows;
- } else {
- --start_y;
- // Fortunately, *alpha data is persistent, so we can go back
- // one row and finish alpha blending, now that the fancy upscaler
- // completed the YUV->RGB interpolation.
- *alpha -= io->width;
- }
- if (io->crop_top + io->mb_y + io->mb_h == io->crop_bottom) {
- // If it's the very last call, we process all the remaining rows!
- *num_rows = io->crop_bottom - io->crop_top - start_y;
- }
- }
- return start_y;
-}
-
-static int EmitAlphaRGB(const VP8Io* const io, WebPDecParams* const p) {
- const uint8_t* alpha = io->a;
- if (alpha != NULL) {
- const int mb_w = io->mb_w;
- const WEBP_CSP_MODE colorspace = p->output->colorspace;
- const int alpha_first =
- (colorspace == MODE_ARGB || colorspace == MODE_Argb);
- const WebPRGBABuffer* const buf = &p->output->u.RGBA;
- int num_rows;
- const int start_y = GetAlphaSourceRow(io, &alpha, &num_rows);
- uint8_t* const base_rgba = buf->rgba + start_y * buf->stride;
- uint8_t* dst = base_rgba + (alpha_first ? 0 : 3);
- uint32_t alpha_mask = 0xff;
- int i, j;
-
- for (j = 0; j < num_rows; ++j) {
- for (i = 0; i < mb_w; ++i) {
- const uint32_t alpha_value = alpha[i];
- dst[4 * i] = alpha_value;
- alpha_mask &= alpha_value;
- }
- alpha += io->width;
- dst += buf->stride;
- }
- // alpha_mask is < 0xff if there's non-trivial alpha to premultiply with.
- if (alpha_mask != 0xff && WebPIsPremultipliedMode(colorspace)) {
- WebPApplyAlphaMultiply(base_rgba, alpha_first,
- mb_w, num_rows, buf->stride);
- }
- }
- return 0;
-}
-
-static int EmitAlphaRGBA4444(const VP8Io* const io, WebPDecParams* const p) {
- const uint8_t* alpha = io->a;
- if (alpha != NULL) {
- const int mb_w = io->mb_w;
- const WEBP_CSP_MODE colorspace = p->output->colorspace;
- const WebPRGBABuffer* const buf = &p->output->u.RGBA;
- int num_rows;
- const int start_y = GetAlphaSourceRow(io, &alpha, &num_rows);
- uint8_t* const base_rgba = buf->rgba + start_y * buf->stride;
- uint8_t* alpha_dst = base_rgba + 1;
- uint32_t alpha_mask = 0x0f;
- int i, j;
-
- for (j = 0; j < num_rows; ++j) {
- for (i = 0; i < mb_w; ++i) {
- // Fill in the alpha value (converted to 4 bits).
- const uint32_t alpha_value = alpha[i] >> 4;
- alpha_dst[2 * i] = (alpha_dst[2 * i] & 0xf0) | alpha_value;
- alpha_mask &= alpha_value;
- }
- alpha += io->width;
- alpha_dst += buf->stride;
- }
- if (alpha_mask != 0x0f && WebPIsPremultipliedMode(colorspace)) {
- WebPApplyAlphaMultiply4444(base_rgba, mb_w, num_rows, buf->stride);
- }
- }
- return 0;
-}
-
-//------------------------------------------------------------------------------
-// YUV rescaling (no final RGB conversion needed)
-
-static int Rescale(const uint8_t* src, int src_stride,
- int new_lines, WebPRescaler* const wrk) {
- int num_lines_out = 0;
- while (new_lines > 0) { // import new contributions of source rows.
- const int lines_in = WebPRescalerImport(wrk, new_lines, src, src_stride);
- src += lines_in * src_stride;
- new_lines -= lines_in;
- num_lines_out += WebPRescalerExport(wrk); // emit output row(s)
- }
- return num_lines_out;
-}
-
-static int EmitRescaledYUV(const VP8Io* const io, WebPDecParams* const p) {
- const int mb_h = io->mb_h;
- const int uv_mb_h = (mb_h + 1) >> 1;
- const int num_lines_out = Rescale(io->y, io->y_stride, mb_h, &p->scaler_y);
- Rescale(io->u, io->uv_stride, uv_mb_h, &p->scaler_u);
- Rescale(io->v, io->uv_stride, uv_mb_h, &p->scaler_v);
- return num_lines_out;
-}
-
-static int EmitRescaledAlphaYUV(const VP8Io* const io, WebPDecParams* const p) {
- if (io->a != NULL) {
- Rescale(io->a, io->width, io->mb_h, &p->scaler_a);
- }
- return 0;
-}
-
-static int InitYUVRescaler(const VP8Io* const io, WebPDecParams* const p) {
- const int has_alpha = WebPIsAlphaMode(p->output->colorspace);
- const WebPYUVABuffer* const buf = &p->output->u.YUVA;
- const int out_width = io->scaled_width;
- const int out_height = io->scaled_height;
- const int uv_out_width = (out_width + 1) >> 1;
- const int uv_out_height = (out_height + 1) >> 1;
- const int uv_in_width = (io->mb_w + 1) >> 1;
- const int uv_in_height = (io->mb_h + 1) >> 1;
- const size_t work_size = 2 * out_width; // scratch memory for luma rescaler
- const size_t uv_work_size = 2 * uv_out_width; // and for each u/v ones
- size_t tmp_size;
- int32_t* work;
-
- tmp_size = work_size + 2 * uv_work_size;
- if (has_alpha) {
- tmp_size += work_size;
- }
- p->memory = calloc(1, tmp_size * sizeof(*work));
- if (p->memory == NULL) {
- return 0; // memory error
- }
- work = (int32_t*)p->memory;
- WebPRescalerInit(&p->scaler_y, io->mb_w, io->mb_h,
- buf->y, out_width, out_height, buf->y_stride, 1,
- io->mb_w, out_width, io->mb_h, out_height,
- work);
- WebPRescalerInit(&p->scaler_u, uv_in_width, uv_in_height,
- buf->u, uv_out_width, uv_out_height, buf->u_stride, 1,
- uv_in_width, uv_out_width,
- uv_in_height, uv_out_height,
- work + work_size);
- WebPRescalerInit(&p->scaler_v, uv_in_width, uv_in_height,
- buf->v, uv_out_width, uv_out_height, buf->v_stride, 1,
- uv_in_width, uv_out_width,
- uv_in_height, uv_out_height,
- work + work_size + uv_work_size);
- p->emit = EmitRescaledYUV;
-
- if (has_alpha) {
- WebPRescalerInit(&p->scaler_a, io->mb_w, io->mb_h,
- buf->a, out_width, out_height, buf->a_stride, 1,
- io->mb_w, out_width, io->mb_h, out_height,
- work + work_size + 2 * uv_work_size);
- p->emit_alpha = EmitRescaledAlphaYUV;
- }
- return 1;
-}
-
-//------------------------------------------------------------------------------
-// RGBA rescaling
-
-static int ExportRGB(WebPDecParams* const p, int y_pos) {
- const WebPYUV444Converter convert =
- WebPYUV444Converters[p->output->colorspace];
- const WebPRGBABuffer* const buf = &p->output->u.RGBA;
- uint8_t* dst = buf->rgba + (p->last_y + y_pos) * buf->stride;
- int num_lines_out = 0;
- // For RGB rescaling, because of the YUV420, current scan position
- // U/V can be +1/-1 line from the Y one. Hence the double test.
- while (WebPRescalerHasPendingOutput(&p->scaler_y) &&
- WebPRescalerHasPendingOutput(&p->scaler_u)) {
- assert(p->last_y + y_pos + num_lines_out < p->output->height);
- assert(p->scaler_u.y_accum == p->scaler_v.y_accum);
- WebPRescalerExportRow(&p->scaler_y);
- WebPRescalerExportRow(&p->scaler_u);
- WebPRescalerExportRow(&p->scaler_v);
- convert(p->scaler_y.dst, p->scaler_u.dst, p->scaler_v.dst,
- dst, p->scaler_y.dst_width);
- dst += buf->stride;
- ++num_lines_out;
- }
- return num_lines_out;
-}
-
-static int EmitRescaledRGB(const VP8Io* const io, WebPDecParams* const p) {
- const int mb_h = io->mb_h;
- const int uv_mb_h = (mb_h + 1) >> 1;
- int j = 0, uv_j = 0;
- int num_lines_out = 0;
- while (j < mb_h) {
- const int y_lines_in =
- WebPRescalerImport(&p->scaler_y, mb_h - j,
- io->y + j * io->y_stride, io->y_stride);
- const int u_lines_in =
- WebPRescalerImport(&p->scaler_u, uv_mb_h - uv_j,
- io->u + uv_j * io->uv_stride, io->uv_stride);
- const int v_lines_in =
- WebPRescalerImport(&p->scaler_v, uv_mb_h - uv_j,
- io->v + uv_j * io->uv_stride, io->uv_stride);
- (void)v_lines_in; // remove a gcc warning
- assert(u_lines_in == v_lines_in);
- j += y_lines_in;
- uv_j += u_lines_in;
- num_lines_out += ExportRGB(p, num_lines_out);
- }
- return num_lines_out;
-}
-
-static int ExportAlpha(WebPDecParams* const p, int y_pos) {
- const WebPRGBABuffer* const buf = &p->output->u.RGBA;
- uint8_t* const base_rgba = buf->rgba + (p->last_y + y_pos) * buf->stride;
- const WEBP_CSP_MODE colorspace = p->output->colorspace;
- const int alpha_first =
- (colorspace == MODE_ARGB || colorspace == MODE_Argb);
- uint8_t* dst = base_rgba + (alpha_first ? 0 : 3);
- int num_lines_out = 0;
- const int is_premult_alpha = WebPIsPremultipliedMode(colorspace);
- uint32_t alpha_mask = 0xff;
- const int width = p->scaler_a.dst_width;
-
- while (WebPRescalerHasPendingOutput(&p->scaler_a)) {
- int i;
- assert(p->last_y + y_pos + num_lines_out < p->output->height);
- WebPRescalerExportRow(&p->scaler_a);
- for (i = 0; i < width; ++i) {
- const uint32_t alpha_value = p->scaler_a.dst[i];
- dst[4 * i] = alpha_value;
- alpha_mask &= alpha_value;
- }
- dst += buf->stride;
- ++num_lines_out;
- }
- if (is_premult_alpha && alpha_mask != 0xff) {
- WebPApplyAlphaMultiply(base_rgba, alpha_first,
- width, num_lines_out, buf->stride);
- }
- return num_lines_out;
-}
-
-static int ExportAlphaRGBA4444(WebPDecParams* const p, int y_pos) {
- const WebPRGBABuffer* const buf = &p->output->u.RGBA;
- uint8_t* const base_rgba = buf->rgba + (p->last_y + y_pos) * buf->stride;
- uint8_t* alpha_dst = base_rgba + 1;
- int num_lines_out = 0;
- const WEBP_CSP_MODE colorspace = p->output->colorspace;
- const int width = p->scaler_a.dst_width;
- const int is_premult_alpha = WebPIsPremultipliedMode(colorspace);
- uint32_t alpha_mask = 0x0f;
-
- while (WebPRescalerHasPendingOutput(&p->scaler_a)) {
- int i;
- assert(p->last_y + y_pos + num_lines_out < p->output->height);
- WebPRescalerExportRow(&p->scaler_a);
- for (i = 0; i < width; ++i) {
- // Fill in the alpha value (converted to 4 bits).
- const uint32_t alpha_value = p->scaler_a.dst[i] >> 4;
- alpha_dst[2 * i] = (alpha_dst[2 * i] & 0xf0) | alpha_value;
- alpha_mask &= alpha_value;
- }
- alpha_dst += buf->stride;
- ++num_lines_out;
- }
- if (is_premult_alpha && alpha_mask != 0x0f) {
- WebPApplyAlphaMultiply4444(base_rgba, width, num_lines_out, buf->stride);
- }
- return num_lines_out;
-}
-
-static int EmitRescaledAlphaRGB(const VP8Io* const io, WebPDecParams* const p) {
- if (io->a != NULL) {
- WebPRescaler* const scaler = &p->scaler_a;
- int j = 0;
- int pos = 0;
- while (j < io->mb_h) {
- j += WebPRescalerImport(scaler, io->mb_h - j,
- io->a + j * io->width, io->width);
- pos += p->emit_alpha_row(p, pos);
- }
- }
- return 0;
-}
-
-static int InitRGBRescaler(const VP8Io* const io, WebPDecParams* const p) {
- const int has_alpha = WebPIsAlphaMode(p->output->colorspace);
- const int out_width = io->scaled_width;
- const int out_height = io->scaled_height;
- const int uv_in_width = (io->mb_w + 1) >> 1;
- const int uv_in_height = (io->mb_h + 1) >> 1;
- const size_t work_size = 2 * out_width; // scratch memory for one rescaler
- int32_t* work; // rescalers work area
- uint8_t* tmp; // tmp storage for scaled YUV444 samples before RGB conversion
- size_t tmp_size1, tmp_size2;
-
- tmp_size1 = 3 * work_size;
- tmp_size2 = 3 * out_width;
- if (has_alpha) {
- tmp_size1 += work_size;
- tmp_size2 += out_width;
- }
- p->memory = calloc(1, tmp_size1 * sizeof(*work) + tmp_size2 * sizeof(*tmp));
- if (p->memory == NULL) {
- return 0; // memory error
- }
- work = (int32_t*)p->memory;
- tmp = (uint8_t*)(work + tmp_size1);
- WebPRescalerInit(&p->scaler_y, io->mb_w, io->mb_h,
- tmp + 0 * out_width, out_width, out_height, 0, 1,
- io->mb_w, out_width, io->mb_h, out_height,
- work + 0 * work_size);
- WebPRescalerInit(&p->scaler_u, uv_in_width, uv_in_height,
- tmp + 1 * out_width, out_width, out_height, 0, 1,
- io->mb_w, 2 * out_width, io->mb_h, 2 * out_height,
- work + 1 * work_size);
- WebPRescalerInit(&p->scaler_v, uv_in_width, uv_in_height,
- tmp + 2 * out_width, out_width, out_height, 0, 1,
- io->mb_w, 2 * out_width, io->mb_h, 2 * out_height,
- work + 2 * work_size);
- p->emit = EmitRescaledRGB;
-
- if (has_alpha) {
- WebPRescalerInit(&p->scaler_a, io->mb_w, io->mb_h,
- tmp + 3 * out_width, out_width, out_height, 0, 1,
- io->mb_w, out_width, io->mb_h, out_height,
- work + 3 * work_size);
- p->emit_alpha = EmitRescaledAlphaRGB;
- if (p->output->colorspace == MODE_RGBA_4444 ||
- p->output->colorspace == MODE_rgbA_4444) {
- p->emit_alpha_row = ExportAlphaRGBA4444;
- } else {
- p->emit_alpha_row = ExportAlpha;
- }
- }
- return 1;
-}
-
-//------------------------------------------------------------------------------
-// Default custom functions
-
-static int CustomSetup(VP8Io* io) {
- WebPDecParams* const p = (WebPDecParams*)io->opaque;
- const WEBP_CSP_MODE colorspace = p->output->colorspace;
- const int is_rgb = WebPIsRGBMode(colorspace);
- const int is_alpha = WebPIsAlphaMode(colorspace);
-
- p->memory = NULL;
- p->emit = NULL;
- p->emit_alpha = NULL;
- p->emit_alpha_row = NULL;
- if (!WebPIoInitFromOptions(p->options, io, is_alpha ? MODE_YUV : MODE_YUVA)) {
- return 0;
- }
-
- if (io->use_scaling) {
- const int ok = is_rgb ? InitRGBRescaler(io, p) : InitYUVRescaler(io, p);
- if (!ok) {
- return 0; // memory error
- }
- } else {
- if (is_rgb) {
- p->emit = EmitSampledRGB; // default
-#ifdef FANCY_UPSAMPLING
- if (io->fancy_upsampling) {
- const int uv_width = (io->mb_w + 1) >> 1;
- p->memory = malloc(io->mb_w + 2 * uv_width);
- if (p->memory == NULL) {
- return 0; // memory error.
- }
- p->tmp_y = (uint8_t*)p->memory;
- p->tmp_u = p->tmp_y + io->mb_w;
- p->tmp_v = p->tmp_u + uv_width;
- p->emit = EmitFancyRGB;
- WebPInitUpsamplers();
- }
-#endif
- } else {
- p->emit = EmitYUV;
- }
- if (is_alpha) { // need transparency output
- if (WebPIsPremultipliedMode(colorspace)) WebPInitPremultiply();
- p->emit_alpha =
- (colorspace == MODE_RGBA_4444 || colorspace == MODE_rgbA_4444) ?
- EmitAlphaRGBA4444
- : is_rgb ? EmitAlphaRGB
- : EmitAlphaYUV;
- }
- }
-
- if (is_rgb) {
- VP8YUVInit();
- }
- return 1;
-}
-
-//------------------------------------------------------------------------------
-
-static int CustomPut(const VP8Io* io) {
- WebPDecParams* const p = (WebPDecParams*)io->opaque;
- const int mb_w = io->mb_w;
- const int mb_h = io->mb_h;
- int num_lines_out;
- assert(!(io->mb_y & 1));
-
- if (mb_w <= 0 || mb_h <= 0) {
- return 0;
- }
- num_lines_out = p->emit(io, p);
- if (p->emit_alpha) {
- p->emit_alpha(io, p);
- }
- p->last_y += num_lines_out;
- return 1;
-}
-
-//------------------------------------------------------------------------------
-
-static void CustomTeardown(const VP8Io* io) {
- WebPDecParams* const p = (WebPDecParams*)io->opaque;
- free(p->memory);
- p->memory = NULL;
-}
-
-//------------------------------------------------------------------------------
-// Main entry point
-
-void WebPInitCustomIo(WebPDecParams* const params, VP8Io* const io) {
- io->put = CustomPut;
- io->setup = CustomSetup;
- io->teardown = CustomTeardown;
- io->opaque = params;
-}
-
-//------------------------------------------------------------------------------
-
-#if defined(__cplusplus) || defined(c_plusplus)
-} // extern "C"
-#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 12:53:19 +0000