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Diffstat (limited to 'ffmpeg/libavcodec/cdxl.c')
-rw-r--r--ffmpeg/libavcodec/cdxl.c307
1 files changed, 0 insertions, 307 deletions
diff --git a/ffmpeg/libavcodec/cdxl.c b/ffmpeg/libavcodec/cdxl.c
deleted file mode 100644
index 13ad57c..0000000
--- a/ffmpeg/libavcodec/cdxl.c
+++ /dev/null
@@ -1,307 +0,0 @@
-/*
- * CDXL video decoder
- * Copyright (c) 2011-2012 Paul B Mahol
- *
- * 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
- * Commodore CDXL video decoder
- * @author Paul B Mahol
- */
-
-#define UNCHECKED_BITSTREAM_READER 1
-
-#include "libavutil/intreadwrite.h"
-#include "libavutil/imgutils.h"
-#include "avcodec.h"
-#include "get_bits.h"
-#include "internal.h"
-
-#define BIT_PLANAR 0x00
-#define CHUNKY 0x20
-#define BYTE_PLANAR 0x40
-#define BIT_LINE 0x80
-#define BYTE_LINE 0xC0
-
-typedef struct {
- AVCodecContext *avctx;
- int bpp;
- int format;
- int padded_bits;
- const uint8_t *palette;
- int palette_size;
- const uint8_t *video;
- int video_size;
- uint8_t *new_video;
- int new_video_size;
-} CDXLVideoContext;
-
-static av_cold int cdxl_decode_init(AVCodecContext *avctx)
-{
- CDXLVideoContext *c = avctx->priv_data;
-
- c->new_video_size = 0;
- c->avctx = avctx;
-
- return 0;
-}
-
-static void import_palette(CDXLVideoContext *c, uint32_t *new_palette)
-{
- int i;
-
- for (i = 0; i < c->palette_size / 2; i++) {
- unsigned rgb = AV_RB16(&c->palette[i * 2]);
- unsigned r = ((rgb >> 8) & 0xF) * 0x11;
- unsigned g = ((rgb >> 4) & 0xF) * 0x11;
- unsigned b = (rgb & 0xF) * 0x11;
- AV_WN32(&new_palette[i], (0xFFU << 24) | (r << 16) | (g << 8) | b);
- }
-}
-
-static void bitplanar2chunky(CDXLVideoContext *c, int linesize, uint8_t *out)
-{
- GetBitContext gb;
- int x, y, plane;
-
- init_get_bits(&gb, c->video, c->video_size * 8);
- for (plane = 0; plane < c->bpp; plane++) {
- for (y = 0; y < c->avctx->height; y++) {
- for (x = 0; x < c->avctx->width; x++)
- out[linesize * y + x] |= get_bits1(&gb) << plane;
- skip_bits(&gb, c->padded_bits);
- }
- }
-}
-
-static void bitline2chunky(CDXLVideoContext *c, int linesize, uint8_t *out)
-{
- GetBitContext gb;
- int x, y, plane;
-
- init_get_bits(&gb, c->video, c->video_size * 8);
- for (y = 0; y < c->avctx->height; y++) {
- for (plane = 0; plane < c->bpp; plane++) {
- for (x = 0; x < c->avctx->width; x++)
- out[linesize * y + x] |= get_bits1(&gb) << plane;
- skip_bits(&gb, c->padded_bits);
- }
- }
-}
-
-static void import_format(CDXLVideoContext *c, int linesize, uint8_t *out)
-{
- memset(out, 0, linesize * c->avctx->height);
-
- switch (c->format) {
- case BIT_PLANAR:
- bitplanar2chunky(c, linesize, out);
- break;
- case BIT_LINE:
- bitline2chunky(c, linesize, out);
- break;
- }
-}
-
-static void cdxl_decode_rgb(CDXLVideoContext *c, AVFrame *frame)
-{
- uint32_t *new_palette = (uint32_t *)frame->data[1];
-
- memset(frame->data[1], 0, AVPALETTE_SIZE);
- import_palette(c, new_palette);
- import_format(c, frame->linesize[0], frame->data[0]);
-}
-
-static void cdxl_decode_ham6(CDXLVideoContext *c, AVFrame *frame)
-{
- AVCodecContext *avctx = c->avctx;
- uint32_t new_palette[16], r, g, b;
- uint8_t *ptr, *out, index, op;
- int x, y;
-
- ptr = c->new_video;
- out = frame->data[0];
-
- import_palette(c, new_palette);
- import_format(c, avctx->width, c->new_video);
-
- for (y = 0; y < avctx->height; y++) {
- r = new_palette[0] & 0xFF0000;
- g = new_palette[0] & 0xFF00;
- b = new_palette[0] & 0xFF;
- for (x = 0; x < avctx->width; x++) {
- index = *ptr++;
- op = index >> 4;
- index &= 15;
- switch (op) {
- case 0:
- r = new_palette[index] & 0xFF0000;
- g = new_palette[index] & 0xFF00;
- b = new_palette[index] & 0xFF;
- break;
- case 1:
- b = index * 0x11;
- break;
- case 2:
- r = index * 0x11 << 16;
- break;
- case 3:
- g = index * 0x11 << 8;
- break;
- }
- AV_WL24(out + x * 3, r | g | b);
- }
- out += frame->linesize[0];
- }
-}
-
-static void cdxl_decode_ham8(CDXLVideoContext *c, AVFrame *frame)
-{
- AVCodecContext *avctx = c->avctx;
- uint32_t new_palette[64], r, g, b;
- uint8_t *ptr, *out, index, op;
- int x, y;
-
- ptr = c->new_video;
- out = frame->data[0];
-
- import_palette(c, new_palette);
- import_format(c, avctx->width, c->new_video);
-
- for (y = 0; y < avctx->height; y++) {
- r = new_palette[0] & 0xFF0000;
- g = new_palette[0] & 0xFF00;
- b = new_palette[0] & 0xFF;
- for (x = 0; x < avctx->width; x++) {
- index = *ptr++;
- op = index >> 6;
- index &= 63;
- switch (op) {
- case 0:
- r = new_palette[index] & 0xFF0000;
- g = new_palette[index] & 0xFF00;
- b = new_palette[index] & 0xFF;
- break;
- case 1:
- b = (index << 2) | (b & 3);
- break;
- case 2:
- r = (index << 18) | (r & (3 << 16));
- break;
- case 3:
- g = (index << 10) | (g & (3 << 8));
- break;
- }
- AV_WL24(out + x * 3, r | g | b);
- }
- out += frame->linesize[0];
- }
-}
-
-static int cdxl_decode_frame(AVCodecContext *avctx, void *data,
- int *got_frame, AVPacket *pkt)
-{
- CDXLVideoContext *c = avctx->priv_data;
- AVFrame * const p = data;
- int ret, w, h, encoding, aligned_width, buf_size = pkt->size;
- const uint8_t *buf = pkt->data;
-
- if (buf_size < 32)
- return AVERROR_INVALIDDATA;
- encoding = buf[1] & 7;
- c->format = buf[1] & 0xE0;
- w = AV_RB16(&buf[14]);
- h = AV_RB16(&buf[16]);
- c->bpp = buf[19];
- c->palette_size = AV_RB16(&buf[20]);
- c->palette = buf + 32;
- c->video = c->palette + c->palette_size;
- c->video_size = buf_size - c->palette_size - 32;
-
- if (c->palette_size > 512)
- return AVERROR_INVALIDDATA;
- if (buf_size < c->palette_size + 32)
- return AVERROR_INVALIDDATA;
- if (c->bpp < 1)
- return AVERROR_INVALIDDATA;
- if (c->format != BIT_PLANAR && c->format != BIT_LINE) {
- avpriv_request_sample(avctx, "Pixel format 0x%0x", c->format);
- return AVERROR_PATCHWELCOME;
- }
-
- if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
- return ret;
-
- aligned_width = FFALIGN(c->avctx->width, 16);
- c->padded_bits = aligned_width - c->avctx->width;
- if (c->video_size < aligned_width * avctx->height * c->bpp / 8)
- return AVERROR_INVALIDDATA;
- if (!encoding && c->palette_size && c->bpp <= 8) {
- avctx->pix_fmt = AV_PIX_FMT_PAL8;
- } else if (encoding == 1 && (c->bpp == 6 || c->bpp == 8)) {
- if (c->palette_size != (1 << (c->bpp - 1)))
- return AVERROR_INVALIDDATA;
- avctx->pix_fmt = AV_PIX_FMT_BGR24;
- } else {
- avpriv_request_sample(avctx, "Encoding %d and bpp %d",
- encoding, c->bpp);
- return AVERROR_PATCHWELCOME;
- }
-
- if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
- return ret;
- p->pict_type = AV_PICTURE_TYPE_I;
-
- if (encoding) {
- av_fast_padded_malloc(&c->new_video, &c->new_video_size,
- h * w + FF_INPUT_BUFFER_PADDING_SIZE);
- if (!c->new_video)
- return AVERROR(ENOMEM);
- if (c->bpp == 8)
- cdxl_decode_ham8(c, p);
- else
- cdxl_decode_ham6(c, p);
- } else {
- cdxl_decode_rgb(c, p);
- }
- *got_frame = 1;
-
- return buf_size;
-}
-
-static av_cold int cdxl_decode_end(AVCodecContext *avctx)
-{
- CDXLVideoContext *c = avctx->priv_data;
-
- av_freep(&c->new_video);
-
- return 0;
-}
-
-AVCodec ff_cdxl_decoder = {
- .name = "cdxl",
- .long_name = NULL_IF_CONFIG_SMALL("Commodore CDXL video"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_CDXL,
- .priv_data_size = sizeof(CDXLVideoContext),
- .init = cdxl_decode_init,
- .close = cdxl_decode_end,
- .decode = cdxl_decode_frame,
- .capabilities = CODEC_CAP_DR1,
-};
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