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-rw-r--r--kopete/protocols/msn/webcam/libmimic/decode.c311
1 files changed, 0 insertions, 311 deletions
diff --git a/kopete/protocols/msn/webcam/libmimic/decode.c b/kopete/protocols/msn/webcam/libmimic/decode.c
deleted file mode 100644
index 83067562..00000000
--- a/kopete/protocols/msn/webcam/libmimic/decode.c
+++ /dev/null
@@ -1,311 +0,0 @@
-/* Copyright (C) 2005 Ole Andr� Vadla Ravn�s <[email protected]>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <string.h>
-#include "mimic-private.h"
-
-
-static gboolean decode(MimCtx *ctx, gboolean is_pframe);
-
-/**
- * Decode a MIMIC-encoded frame into RGB data.
- *
- * @param ctx the mimic context
- * @param input_buffer buffer containing the MIMIC-encoded frame to decode
- * @param output_buffer buffer that will receive the decoded frame in RGB 24-bpp packed pixel top-down format
- * (use #mimic_get_property to determine the required buffer size, as well as frame width and height)
- * @returns #TRUE on success
- */
-gboolean mimic_decode_frame(MimCtx *ctx,
- const guchar *input_buffer,
- guchar *output_buffer)
-{
- gboolean result, is_pframe;
- guchar *input_y, *input_cr, *input_cb;
- gint width, height;
-
- /*
- * Some sanity checks.
- */
- if (ctx == NULL || input_buffer == NULL || output_buffer == NULL)
- {
- return FALSE;
- }
-
- if (!ctx->decoder_initialized)
- {
- return FALSE;
- }
-
- /*
- * Get frame dimensions.
- */
- width = GUINT16_FROM_LE(*((guint16 *) (input_buffer + 4)));
- height = GUINT16_FROM_LE(*((guint16 *) (input_buffer + 6)));
-
- /*
- * Resolution changing is not supported.
- */
- if (width != ctx->frame_width ||
- height != ctx->frame_height)
- {
- return FALSE;
- }
-
- /*
- * Increment frame counter.
- */
- ctx->frame_num++;
-
- /*
- * Initialize state.
- */
- ctx->quality = GUINT16_FROM_LE(*((guint16 *) (input_buffer + 2)));
- is_pframe = GUINT32_FROM_LE(*((guint32 *) (input_buffer + 12)));
- ctx->num_coeffs = input_buffer[16];
-
- ctx->data_buffer = (gchar *) (input_buffer + 20);
- ctx->data_index = 0;
- ctx->cur_chunk_len = 16;
- ctx->read_odd = FALSE;
-
- /*
- * Decode frame.
- */
- if (!(is_pframe && ctx->prev_frame_buf == NULL))
- result = decode(ctx, is_pframe);
- else
- {
- result = FALSE;
- }
-
- /*
- * Perform YUV 420 to RGB conversion.
- */
- input_y = ctx->cur_frame_buf;
- input_cr = ctx->cur_frame_buf + ctx->y_size;
- input_cb = ctx->cur_frame_buf + ctx->y_size + ctx->crcb_size;
-
- _yuv_to_rgb(input_y,
- input_cb,
- input_cr,
- output_buffer,
- ctx->frame_width,
- ctx->frame_height);
-
- return result;
-}
-
-/*
- * decode_main
- *
- * Main decoding loop.
- */
-static gboolean decode(MimCtx *ctx, gboolean is_pframe)
-{
- gint y, x, i, j, chrom_ch, *bptr, base_offset, offset;
- gint dct_block[64];
- guchar *src, *dst, *p;
- guint32 bit;
-
- /*
- * Clear Cr and Cb planes.
- */
- p = ctx->cur_frame_buf + ctx->y_size;
- memset(p, 128, 2 * ctx->crcb_size);
-
- /*
- * Decode Y plane.
- */
- for (y = 0; y < ctx->num_vblocks_y; y++) {
-
- base_offset = ctx->y_stride * 8 * y;
-
- src = ctx->prev_frame_buf + base_offset;
- dst = ctx->cur_frame_buf + base_offset;
-
- for (x = 0; x < ctx->num_hblocks_y; x++) {
-
- /* Check for a change condition in the current block. */
-
- if (is_pframe)
- bit = _read_bits(ctx, 1);
- else
- bit = 0;
-
- if (bit == 0) {
-
- /* Yes: Is the new content the same as it was in one of
- * the 15 last frames preceding the previous? */
-
- if (is_pframe)
- bit = _read_bits(ctx, 1);
-
- if (bit == 0) {
-
- /* No: decode it. */
-
- if (_vlc_decode_block(ctx, dct_block, ctx->num_coeffs) == FALSE) {
-
- return FALSE;
- }
-
- _idct_dequant_block(ctx, dct_block, 0);
-
- bptr = dct_block;
- for (i = 0; i < 8; i++) {
- offset = ctx->y_stride * i;
-
- for (j = 0; j < 8; j++) {
- guint v;
-
- if (bptr[j] <= 255)
- v = (bptr[j] >= 0) ? bptr[j] : 0;
- else
- v = 255;
-
- *(dst + offset + j) = v;
- }
-
- bptr += 8;
- }
- } else {
- guint32 backref;
-
- /* Yes: read the backreference (4 bits) and copy. */
-
- backref = _read_bits(ctx, 4);
-
- p = ctx->buf_ptrs[(ctx->ptr_index + backref) % 16];
- p += base_offset + (x * 8);
-
- for (i = 0; i < 8; i++) {
- offset = ctx->y_stride * i;
-
- memcpy(dst + offset, p + offset, 8);
- }
- }
- } else {
-
- /* No change no worries: just copy from the previous frame. */
-
- for (i = 0; i < 8; i++) {
- offset = ctx->y_stride * i;
-
- memcpy(dst + offset, src + offset, 8);
- }
- }
-
- src += 8;
- dst += 8;
- }
- }
-
- /*
- * Decode Cr and Cb planes.
- */
- for (chrom_ch = 0; chrom_ch < 2; chrom_ch++) {
-
- base_offset = ctx->y_size + (ctx->crcb_size * chrom_ch);
-
- for (y = 0; y < ctx->num_vblocks_cbcr; y++) {
- guint num_rows = 8;
-
- /* The last row of blocks in chrominance for 160x120 resolution
- * is half the normal height and must be accounted for. */
- if (y + 1 == ctx->num_vblocks_cbcr && ctx->frame_height % 16 != 0)
- num_rows = 4;
-
- offset = base_offset + (ctx->crcb_stride * 8 * y);
-
- src = ctx->prev_frame_buf + offset;
- dst = ctx->cur_frame_buf + offset;
-
- for (x = 0; x < ctx->num_hblocks_cbcr; x++) {
-
- /* Check for a change condition in the current block. */
-
- if (is_pframe)
- bit = _read_bits(ctx, 1);
- else
- bit = 1;
-
- if (bit == 1) {
-
- /* Yes: decode it. */
-
- if (_vlc_decode_block(ctx, dct_block, ctx->num_coeffs) == FALSE) {
-
- /* Corrupted frame: clear Cr and Cb planes and return. */
- p = ctx->cur_frame_buf + ctx->y_size;
- memset(p, 128, ctx->crcb_size * 2);
-
- return FALSE;
- }
-
- _idct_dequant_block(ctx, dct_block, 1);
-
- for (i = 0; i < num_rows; i++) {
- p = dst + (ctx->crcb_stride * i);
-
- for (j = 0; j < 8; j++)
- p[j] = dct_block[(i * 8) + j];
- }
-
- } else {
-
- /* No change no worries: just copy from the previous frame. */
-
- for (i = 0; i < num_rows; i++) {
- offset = ctx->crcb_stride * i;
-
- memcpy(dst + offset, src + offset, 8);
- }
- }
-
- src += 8;
- dst += 8;
- }
- }
- }
-
- /*
- * Make a copy of the current frame and store in
- * the circular pointer list of 16 entries.
- */
- ctx->prev_frame_buf = ctx->buf_ptrs[ctx->ptr_index];
- memcpy(ctx->prev_frame_buf, ctx->cur_frame_buf,
- ctx->y_size + (ctx->crcb_size * 2));
-
- if (--ctx->ptr_index < 0)
- ctx->ptr_index = 15;
-
- /*
- * Perform deblocking on all planes.
- */
- _deblock(ctx->cur_frame_buf,
- ctx->y_stride, ctx->y_row_count);
-
- _deblock(ctx->cur_frame_buf + ctx->y_size,
- ctx->crcb_stride, ctx->crcb_row_count);
-
- _deblock(ctx->cur_frame_buf + ctx->y_size + ctx->crcb_size,
- ctx->crcb_stride, ctx->crcb_row_count);
-
- return TRUE;
-}
-
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-13 15:14:10 +0000