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Diffstat (limited to 'ffmpeg1/libavcodec/pictordec.c')
-rw-r--r--ffmpeg1/libavcodec/pictordec.c262
1 files changed, 0 insertions, 262 deletions
diff --git a/ffmpeg1/libavcodec/pictordec.c b/ffmpeg1/libavcodec/pictordec.c
deleted file mode 100644
index bf138b2..0000000
--- a/ffmpeg1/libavcodec/pictordec.c
+++ /dev/null
@@ -1,262 +0,0 @@
-/*
- * Pictor/PC Paint decoder
- * Copyright (c) 2010 Peter Ross <pross@xvid.org>
- *
- * 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
- * Pictor/PC Paint decoder
- */
-
-#include "libavutil/imgutils.h"
-#include "avcodec.h"
-#include "bytestream.h"
-#include "cga_data.h"
-#include "internal.h"
-
-typedef struct PicContext {
- int width, height;
- int nb_planes;
- GetByteContext g;
-} PicContext;
-
-static void picmemset_8bpp(PicContext *s, AVFrame *frame, int value, int run,
- int *x, int *y)
-{
- while (run > 0) {
- uint8_t *d = frame->data[0] + *y * frame->linesize[0];
- if (*x + run >= s->width) {
- int n = s->width - *x;
- memset(d + *x, value, n);
- run -= n;
- *x = 0;
- *y -= 1;
- if (*y < 0)
- break;
- } else {
- memset(d + *x, value, run);
- *x += run;
- break;
- }
- }
-}
-
-static void picmemset(PicContext *s, AVFrame *frame, int value, int run,
- int *x, int *y, int *plane, int bits_per_plane)
-{
- uint8_t *d;
- int shift = *plane * bits_per_plane;
- int mask = ((1 << bits_per_plane) - 1) << shift;
- value <<= shift;
-
- while (run > 0) {
- int j;
- for (j = 8-bits_per_plane; j >= 0; j -= bits_per_plane) {
- d = frame->data[0] + *y * frame->linesize[0];
- d[*x] |= (value >> j) & mask;
- *x += 1;
- if (*x == s->width) {
- *y -= 1;
- *x = 0;
- if (*y < 0) {
- *y = s->height - 1;
- *plane += 1;
- value <<= bits_per_plane;
- mask <<= bits_per_plane;
- if (*plane >= s->nb_planes)
- break;
- }
- }
- }
- run--;
- }
-}
-
-static const uint8_t cga_mode45_index[6][4] = {
- [0] = { 0, 3, 5, 7 }, // mode4, palette#1, low intensity
- [1] = { 0, 2, 4, 6 }, // mode4, palette#2, low intensity
- [2] = { 0, 3, 4, 7 }, // mode5, low intensity
- [3] = { 0, 11, 13, 15 }, // mode4, palette#1, high intensity
- [4] = { 0, 10, 12, 14 }, // mode4, palette#2, high intensity
- [5] = { 0, 11, 12, 15 }, // mode5, high intensity
-};
-
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- PicContext *s = avctx->priv_data;
- AVFrame *frame = data;
- uint32_t *palette;
- int bits_per_plane, bpp, etype, esize, npal, pos_after_pal;
- int i, x, y, plane, tmp, ret, val;
-
- bytestream2_init(&s->g, avpkt->data, avpkt->size);
-
- if (bytestream2_get_bytes_left(&s->g) < 11)
- return AVERROR_INVALIDDATA;
-
- if (bytestream2_get_le16u(&s->g) != 0x1234)
- return AVERROR_INVALIDDATA;
-
- s->width = bytestream2_get_le16u(&s->g);
- s->height = bytestream2_get_le16u(&s->g);
- bytestream2_skip(&s->g, 4);
- tmp = bytestream2_get_byteu(&s->g);
- bits_per_plane = tmp & 0xF;
- s->nb_planes = (tmp >> 4) + 1;
- bpp = bits_per_plane * s->nb_planes;
- if (bits_per_plane > 8 || bpp < 1 || bpp > 32) {
- avpriv_request_sample(avctx, "Unsupported bit depth");
- return AVERROR_PATCHWELCOME;
- }
-
- if (bytestream2_peek_byte(&s->g) == 0xFF || bpp == 1 || bpp == 4 || bpp == 8) {
- bytestream2_skip(&s->g, 2);
- etype = bytestream2_get_le16(&s->g);
- esize = bytestream2_get_le16(&s->g);
- if (bytestream2_get_bytes_left(&s->g) < esize)
- return AVERROR_INVALIDDATA;
- } else {
- etype = -1;
- esize = 0;
- }
-
- avctx->pix_fmt = AV_PIX_FMT_PAL8;
-
- if (s->width != avctx->width && s->height != avctx->height) {
- if (av_image_check_size(s->width, s->height, 0, avctx) < 0)
- return -1;
- avcodec_set_dimensions(avctx, s->width, s->height);
- }
-
- if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
- return ret;
- memset(frame->data[0], 0, s->height * frame->linesize[0]);
- frame->pict_type = AV_PICTURE_TYPE_I;
- frame->palette_has_changed = 1;
-
- pos_after_pal = bytestream2_tell(&s->g) + esize;
- palette = (uint32_t*)frame->data[1];
- if (etype == 1 && esize > 1 && bytestream2_peek_byte(&s->g) < 6) {
- int idx = bytestream2_get_byte(&s->g);
- npal = 4;
- for (i = 0; i < npal; i++)
- palette[i] = ff_cga_palette[ cga_mode45_index[idx][i] ];
- } else if (etype == 2) {
- npal = FFMIN(esize, 16);
- for (i = 0; i < npal; i++) {
- int pal_idx = bytestream2_get_byte(&s->g);
- palette[i] = ff_cga_palette[FFMIN(pal_idx, 15)];
- }
- } else if (etype == 3) {
- npal = FFMIN(esize, 16);
- for (i = 0; i < npal; i++) {
- int pal_idx = bytestream2_get_byte(&s->g);
- palette[i] = ff_ega_palette[FFMIN(pal_idx, 63)];
- }
- } else if (etype == 4 || etype == 5) {
- npal = FFMIN(esize / 3, 256);
- for (i = 0; i < npal; i++) {
- palette[i] = bytestream2_get_be24(&s->g) << 2;
- palette[i] |= 0xFFU << 24 | palette[i] >> 6 & 0x30303;
- }
- } else {
- if (bpp == 1) {
- npal = 2;
- palette[0] = 0xFF000000;
- palette[1] = 0xFFFFFFFF;
- } else if (bpp == 2) {
- npal = 4;
- for (i = 0; i < npal; i++)
- palette[i] = ff_cga_palette[ cga_mode45_index[0][i] ];
- } else {
- npal = 16;
- memcpy(palette, ff_cga_palette, npal * 4);
- }
- }
- // fill remaining palette entries
- memset(palette + npal, 0, AVPALETTE_SIZE - npal * 4);
- // skip remaining palette bytes
- bytestream2_seek(&s->g, pos_after_pal, SEEK_SET);
-
- val = 0;
- y = s->height - 1;
- if (bytestream2_get_le16(&s->g)) {
- x = 0;
- plane = 0;
- while (y >= 0 && bytestream2_get_bytes_left(&s->g) >= 6) {
- int stop_size, marker, t1, t2;
-
- t1 = bytestream2_get_bytes_left(&s->g);
- t2 = bytestream2_get_le16(&s->g);
- stop_size = t1 - FFMIN(t1, t2);
- // ignore uncompressed block size
- bytestream2_skip(&s->g, 2);
- marker = bytestream2_get_byte(&s->g);
-
- while (plane < s->nb_planes && y >= 0 &&
- bytestream2_get_bytes_left(&s->g) > stop_size) {
- int run = 1;
- val = bytestream2_get_byte(&s->g);
- if (val == marker) {
- run = bytestream2_get_byte(&s->g);
- if (run == 0)
- run = bytestream2_get_le16(&s->g);
- val = bytestream2_get_byte(&s->g);
- }
- if (!bytestream2_get_bytes_left(&s->g))
- break;
-
- if (bits_per_plane == 8) {
- picmemset_8bpp(s, frame, val, run, &x, &y);
- } else {
- picmemset(s, frame, val, run, &x, &y, &plane, bits_per_plane);
- }
- }
- }
-
- if (x < avctx->width && y >= 0) {
- int run = (y + 1) * avctx->width - x;
- if (bits_per_plane == 8)
- picmemset_8bpp(s, frame, val, run, &x, &y);
- else
- picmemset(s, frame, val, run / (8 / bits_per_plane), &x, &y, &plane, bits_per_plane);
- }
- } else {
- while (y >= 0 && bytestream2_get_bytes_left(&s->g) > 0) {
- memcpy(frame->data[0] + y * frame->linesize[0], s->g.buffer, FFMIN(avctx->width, bytestream2_get_bytes_left(&s->g)));
- bytestream2_skip(&s->g, avctx->width);
- y--;
- }
- }
-
- *got_frame = 1;
- return avpkt->size;
-}
-
-AVCodec ff_pictor_decoder = {
- .name = "pictor",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_PICTOR,
- .priv_data_size = sizeof(PicContext),
- .decode = decode_frame,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Pictor/PC Paint"),
-};
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