chasing indexing error

1 files changed, 0 insertions, 476 deletions

diff --git a/ffmpeg/libavcodec/smc.c b/ffmpeg/libavcodec/smc.c
deleted file mode 100644
index 31e6c88..0000000
--- a/ffmpeg/libavcodec/smc.c
+++ /dev/null
@@ -1,476 +0,0 @@
-/*
- * Quicktime Graphics (SMC) Video Decoder
- * Copyright (C) 2003 the ffmpeg project
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg 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.
- *
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * QT SMC Video Decoder by Mike Melanson (melanson@pcisys.net)
- * For more information about the SMC format, visit:
- *   http://www.pcisys.net/~melanson/codecs/
- *
- * The SMC decoder outputs PAL8 colorspace data.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "libavutil/intreadwrite.h"
-#include "avcodec.h"
-#include "bytestream.h"
-#include "internal.h"
-
-#define CPAIR 2
-#define CQUAD 4
-#define COCTET 8
-
-#define COLORS_PER_TABLE 256
-
-typedef struct SmcContext {
-
-    AVCodecContext *avctx;
-    AVFrame *frame;
-
-    GetByteContext gb;
-
-    /* SMC color tables */
-    unsigned char color_pairs[COLORS_PER_TABLE * CPAIR];
-    unsigned char color_quads[COLORS_PER_TABLE * CQUAD];
-    unsigned char color_octets[COLORS_PER_TABLE * COCTET];
-
-    uint32_t pal[256];
-} SmcContext;
-
-#define GET_BLOCK_COUNT() \
-  (opcode & 0x10) ? (1 + bytestream2_get_byte(&s->gb)) : 1 + (opcode & 0x0F);
-
-#define ADVANCE_BLOCK() \
-{ \
-    pixel_ptr += 4; \
-    if (pixel_ptr >= width) \
-    { \
-        pixel_ptr = 0; \
-        row_ptr += stride * 4; \
-    } \
-    total_blocks--; \
-    if (total_blocks < 0) \
-    { \
-        av_log(s->avctx, AV_LOG_INFO, "warning: block counter just went negative (this should not happen)\n"); \
-        return; \
-    } \
-}
-
-static void smc_decode_stream(SmcContext *s)
-{
-    int width = s->avctx->width;
-    int height = s->avctx->height;
-    int stride = s->frame->linesize[0];
-    int i;
-    int chunk_size;
-    int buf_size = bytestream2_size(&s->gb);
-    unsigned char opcode;
-    int n_blocks;
-    unsigned int color_flags;
-    unsigned int color_flags_a;
-    unsigned int color_flags_b;
-    unsigned int flag_mask;
-
-    unsigned char *pixels = s->frame->data[0];
-
-    int image_size = height * s->frame->linesize[0];
-    int row_ptr = 0;
-    int pixel_ptr = 0;
-    int pixel_x, pixel_y;
-    int row_inc = stride - 4;
-    int block_ptr;
-    int prev_block_ptr;
-    int prev_block_ptr1, prev_block_ptr2;
-    int prev_block_flag;
-    int total_blocks;
-    int color_table_index;  /* indexes to color pair, quad, or octet tables */
-    int pixel;
-
-    int color_pair_index = 0;
-    int color_quad_index = 0;
-    int color_octet_index = 0;
-
-    /* make the palette available */
-    memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE);
-
-    bytestream2_skip(&s->gb, 1);
-    chunk_size = bytestream2_get_be24(&s->gb);
-    if (chunk_size != buf_size)
-        av_log(s->avctx, AV_LOG_INFO, "warning: MOV chunk size != encoded chunk size (%d != %d); using MOV chunk size\n",
-            chunk_size, buf_size);
-
-    chunk_size = buf_size;
-    total_blocks = ((s->avctx->width + 3) / 4) * ((s->avctx->height + 3) / 4);
-
-    /* traverse through the blocks */
-    while (total_blocks) {
-        /* sanity checks */
-        /* make sure the row pointer hasn't gone wild */
-        if (row_ptr >= image_size) {
-            av_log(s->avctx, AV_LOG_INFO, "SMC decoder just went out of bounds (row ptr = %d, height = %d)\n",
-                row_ptr, image_size);
-            return;
-        }
-
-        opcode = bytestream2_get_byte(&s->gb);
-        switch (opcode & 0xF0) {
-        /* skip n blocks */
-        case 0x00:
-        case 0x10:
-            n_blocks = GET_BLOCK_COUNT();
-            while (n_blocks--) {
-                ADVANCE_BLOCK();
-            }
-            break;
-
-        /* repeat last block n times */
-        case 0x20:
-        case 0x30:
-            n_blocks = GET_BLOCK_COUNT();
-
-            /* sanity check */
-            if ((row_ptr == 0) && (pixel_ptr == 0)) {
-                av_log(s->avctx, AV_LOG_INFO, "encountered repeat block opcode (%02X) but no blocks rendered yet\n",
-                    opcode & 0xF0);
-                return;
-            }
-
-            /* figure out where the previous block started */
-            if (pixel_ptr == 0)
-                prev_block_ptr1 =
-                    (row_ptr - s->avctx->width * 4) + s->avctx->width - 4;
-            else
-                prev_block_ptr1 = row_ptr + pixel_ptr - 4;
-
-            while (n_blocks--) {
-                block_ptr = row_ptr + pixel_ptr;
-                prev_block_ptr = prev_block_ptr1;
-                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
-                    for (pixel_x = 0; pixel_x < 4; pixel_x++) {
-                        pixels[block_ptr++] = pixels[prev_block_ptr++];
-                    }
-                    block_ptr += row_inc;
-                    prev_block_ptr += row_inc;
-                }
-                ADVANCE_BLOCK();
-            }
-            break;
-
-        /* repeat previous pair of blocks n times */
-        case 0x40:
-        case 0x50:
-            n_blocks = GET_BLOCK_COUNT();
-            n_blocks *= 2;
-
-            /* sanity check */
-            if ((row_ptr == 0) && (pixel_ptr < 2 * 4)) {
-                av_log(s->avctx, AV_LOG_INFO, "encountered repeat block opcode (%02X) but not enough blocks rendered yet\n",
-                    opcode & 0xF0);
-                return;
-            }
-
-            /* figure out where the previous 2 blocks started */
-            if (pixel_ptr == 0)
-                prev_block_ptr1 = (row_ptr - s->avctx->width * 4) +
-                    s->avctx->width - 4 * 2;
-            else if (pixel_ptr == 4)
-                prev_block_ptr1 = (row_ptr - s->avctx->width * 4) + row_inc;
-            else
-                prev_block_ptr1 = row_ptr + pixel_ptr - 4 * 2;
-
-            if (pixel_ptr == 0)
-                prev_block_ptr2 = (row_ptr - s->avctx->width * 4) + row_inc;
-            else
-                prev_block_ptr2 = row_ptr + pixel_ptr - 4;
-
-            prev_block_flag = 0;
-            while (n_blocks--) {
-                block_ptr = row_ptr + pixel_ptr;
-                if (prev_block_flag)
-                    prev_block_ptr = prev_block_ptr2;
-                else
-                    prev_block_ptr = prev_block_ptr1;
-                prev_block_flag = !prev_block_flag;
-
-                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
-                    for (pixel_x = 0; pixel_x < 4; pixel_x++) {
-                        pixels[block_ptr++] = pixels[prev_block_ptr++];
-                    }
-                    block_ptr += row_inc;
-                    prev_block_ptr += row_inc;
-                }
-                ADVANCE_BLOCK();
-            }
-            break;
-
-        /* 1-color block encoding */
-        case 0x60:
-        case 0x70:
-            n_blocks = GET_BLOCK_COUNT();
-            pixel = bytestream2_get_byte(&s->gb);
-
-            while (n_blocks--) {
-                block_ptr = row_ptr + pixel_ptr;
-                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
-                    for (pixel_x = 0; pixel_x < 4; pixel_x++) {
-                        pixels[block_ptr++] = pixel;
-                    }
-                    block_ptr += row_inc;
-                }
-                ADVANCE_BLOCK();
-            }
-            break;
-
-        /* 2-color block encoding */
-        case 0x80:
-        case 0x90:
-            n_blocks = (opcode & 0x0F) + 1;
-
-            /* figure out which color pair to use to paint the 2-color block */
-            if ((opcode & 0xF0) == 0x80) {
-                /* fetch the next 2 colors from bytestream and store in next
-                 * available entry in the color pair table */
-                for (i = 0; i < CPAIR; i++) {
-                    pixel = bytestream2_get_byte(&s->gb);
-                    color_table_index = CPAIR * color_pair_index + i;
-                    s->color_pairs[color_table_index] = pixel;
-                }
-                /* this is the base index to use for this block */
-                color_table_index = CPAIR * color_pair_index;
-                color_pair_index++;
-                /* wraparound */
-                if (color_pair_index == COLORS_PER_TABLE)
-                    color_pair_index = 0;
-            } else
-                color_table_index = CPAIR * bytestream2_get_byte(&s->gb);
-
-            while (n_blocks--) {
-                color_flags = bytestream2_get_be16(&s->gb);
-                flag_mask = 0x8000;
-                block_ptr = row_ptr + pixel_ptr;
-                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
-                    for (pixel_x = 0; pixel_x < 4; pixel_x++) {
-                        if (color_flags & flag_mask)
-                            pixel = color_table_index + 1;
-                        else
-                            pixel = color_table_index;
-                        flag_mask >>= 1;
-                        pixels[block_ptr++] = s->color_pairs[pixel];
-                    }
-                    block_ptr += row_inc;
-                }
-                ADVANCE_BLOCK();
-            }
-            break;
-
-        /* 4-color block encoding */
-        case 0xA0:
-        case 0xB0:
-            n_blocks = (opcode & 0x0F) + 1;
-
-            /* figure out which color quad to use to paint the 4-color block */
-            if ((opcode & 0xF0) == 0xA0) {
-                /* fetch the next 4 colors from bytestream and store in next
-                 * available entry in the color quad table */
-                for (i = 0; i < CQUAD; i++) {
-                    pixel = bytestream2_get_byte(&s->gb);
-                    color_table_index = CQUAD * color_quad_index + i;
-                    s->color_quads[color_table_index] = pixel;
-                }
-                /* this is the base index to use for this block */
-                color_table_index = CQUAD * color_quad_index;
-                color_quad_index++;
-                /* wraparound */
-                if (color_quad_index == COLORS_PER_TABLE)
-                    color_quad_index = 0;
-            } else
-                color_table_index = CQUAD * bytestream2_get_byte(&s->gb);
-
-            while (n_blocks--) {
-                color_flags = bytestream2_get_be32(&s->gb);
-                /* flag mask actually acts as a bit shift count here */
-                flag_mask = 30;
-                block_ptr = row_ptr + pixel_ptr;
-                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
-                    for (pixel_x = 0; pixel_x < 4; pixel_x++) {
-                        pixel = color_table_index +
-                            ((color_flags >> flag_mask) & 0x03);
-                        flag_mask -= 2;
-                        pixels[block_ptr++] = s->color_quads[pixel];
-                    }
-                    block_ptr += row_inc;
-                }
-                ADVANCE_BLOCK();
-            }
-            break;
-
-        /* 8-color block encoding */
-        case 0xC0:
-        case 0xD0:
-            n_blocks = (opcode & 0x0F) + 1;
-
-            /* figure out which color octet to use to paint the 8-color block */
-            if ((opcode & 0xF0) == 0xC0) {
-                /* fetch the next 8 colors from bytestream and store in next
-                 * available entry in the color octet table */
-                for (i = 0; i < COCTET; i++) {
-                    pixel = bytestream2_get_byte(&s->gb);
-                    color_table_index = COCTET * color_octet_index + i;
-                    s->color_octets[color_table_index] = pixel;
-                }
-                /* this is the base index to use for this block */
-                color_table_index = COCTET * color_octet_index;
-                color_octet_index++;
-                /* wraparound */
-                if (color_octet_index == COLORS_PER_TABLE)
-                    color_octet_index = 0;
-            } else
-                color_table_index = COCTET * bytestream2_get_byte(&s->gb);
-
-            while (n_blocks--) {
-                /*
-                  For this input of 6 hex bytes:
-                    01 23 45 67 89 AB
-                  Mangle it to this output:
-                    flags_a = xx012456, flags_b = xx89A37B
-                */
-                /* build the color flags */
-                int val1 = bytestream2_get_be16(&s->gb);
-                int val2 = bytestream2_get_be16(&s->gb);
-                int val3 = bytestream2_get_be16(&s->gb);
-                color_flags_a = ((val1 & 0xFFF0) << 8) | (val2 >> 4);
-                color_flags_b = ((val3 & 0xFFF0) << 8) |
-                    ((val1 & 0x0F) << 8) | ((val2 & 0x0F) << 4) | (val3 & 0x0F);
-
-                color_flags = color_flags_a;
-                /* flag mask actually acts as a bit shift count here */
-                flag_mask = 21;
-                block_ptr = row_ptr + pixel_ptr;
-                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
-                    /* reload flags at third row (iteration pixel_y == 2) */
-                    if (pixel_y == 2) {
-                        color_flags = color_flags_b;
-                        flag_mask = 21;
-                    }
-                    for (pixel_x = 0; pixel_x < 4; pixel_x++) {
-                        pixel = color_table_index +
-                            ((color_flags >> flag_mask) & 0x07);
-                        flag_mask -= 3;
-                        pixels[block_ptr++] = s->color_octets[pixel];
-                    }
-                    block_ptr += row_inc;
-                }
-                ADVANCE_BLOCK();
-            }
-            break;
-
-        /* 16-color block encoding (every pixel is a different color) */
-        case 0xE0:
-            n_blocks = (opcode & 0x0F) + 1;
-
-            while (n_blocks--) {
-                block_ptr = row_ptr + pixel_ptr;
-                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
-                    for (pixel_x = 0; pixel_x < 4; pixel_x++) {
-                        pixels[block_ptr++] = bytestream2_get_byte(&s->gb);
-                    }
-                    block_ptr += row_inc;
-                }
-                ADVANCE_BLOCK();
-            }
-            break;
-
-        case 0xF0:
-            avpriv_request_sample(s->avctx, "0xF0 opcode");
-            break;
-        }
-    }
-
-    return;
-}
-
-static av_cold int smc_decode_init(AVCodecContext *avctx)
-{
-    SmcContext *s = avctx->priv_data;
-
-    s->avctx = avctx;
-    avctx->pix_fmt = AV_PIX_FMT_PAL8;
-
-    s->frame = av_frame_alloc();
-    if (!s->frame)
-        return AVERROR(ENOMEM);
-
-    return 0;
-}
-
-static int smc_decode_frame(AVCodecContext *avctx,
-                             void *data, int *got_frame,
-                             AVPacket *avpkt)
-{
-    const uint8_t *buf = avpkt->data;
-    int buf_size = avpkt->size;
-    SmcContext *s = avctx->priv_data;
-    const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
-    int ret;
-
-    bytestream2_init(&s->gb, buf, buf_size);
-
-    if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
-        return ret;
-
-    if (pal) {
-        s->frame->palette_has_changed = 1;
-        memcpy(s->pal, pal, AVPALETTE_SIZE);
-    }
-
-    smc_decode_stream(s);
-
-    *got_frame      = 1;
-    if ((ret = av_frame_ref(data, s->frame)) < 0)
-        return ret;
-
-    /* always report that the buffer was completely consumed */
-    return buf_size;
-}
-
-static av_cold int smc_decode_end(AVCodecContext *avctx)
-{
-    SmcContext *s = avctx->priv_data;
-
-    av_frame_free(&s->frame);
-
-    return 0;
-}
-
-AVCodec ff_smc_decoder = {
-    .name           = "smc",
-    .long_name      = NULL_IF_CONFIG_SMALL("QuickTime Graphics (SMC)"),
-    .type           = AVMEDIA_TYPE_VIDEO,
-    .id             = AV_CODEC_ID_SMC,
-    .priv_data_size = sizeof(SmcContext),
-    .init           = smc_decode_init,
-    .close          = smc_decode_end,
-    .decode         = smc_decode_frame,
-    .capabilities   = CODEC_CAP_DR1,
-};