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Diffstat (limited to 'src/libffmpeg/libavcodec/msvideo1.c')
-rw-r--r--src/libffmpeg/libavcodec/msvideo1.c349
1 files changed, 0 insertions, 349 deletions
diff --git a/src/libffmpeg/libavcodec/msvideo1.c b/src/libffmpeg/libavcodec/msvideo1.c
deleted file mode 100644
index 1e3f6cce2..000000000
--- a/src/libffmpeg/libavcodec/msvideo1.c
+++ /dev/null
@@ -1,349 +0,0 @@
-/*
- * Microsoft Video-1 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 msvideo1.c
- * Microsoft Video-1 Decoder by Mike Melanson (melanson@pcisys.net)
- * For more information about the MS Video-1 format, visit:
- * http://www.pcisys.net/~melanson/codecs/
- *
- * This decoder outputs either PAL8 or RGB555 data, depending on the
- * whether a RGB palette was passed through palctrl;
- * if it's present, then the data is PAL8; RGB555 otherwise.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "common.h"
-#include "avcodec.h"
-#include "dsputil.h"
-
-#define PALETTE_COUNT 256
-#define CHECK_STREAM_PTR(n) \
- if ((stream_ptr + n) > s->size ) { \
- av_log(s->avctx, AV_LOG_ERROR, " MS Video-1 warning: stream_ptr out of bounds (%d >= %d)\n", \
- stream_ptr + n, s->size); \
- return; \
- }
-
-typedef struct Msvideo1Context {
-
- AVCodecContext *avctx;
- DSPContext dsp;
- AVFrame frame;
-
- unsigned char *buf;
- int size;
-
- int mode_8bit; /* if it's not 8-bit, it's 16-bit */
-
-} Msvideo1Context;
-
-static int msvideo1_decode_init(AVCodecContext *avctx)
-{
- Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
-
- s->avctx = avctx;
-
- /* figure out the colorspace based on the presence of a palette */
- if (s->avctx->palctrl) {
- s->mode_8bit = 1;
- avctx->pix_fmt = PIX_FMT_PAL8;
- } else {
- s->mode_8bit = 0;
- avctx->pix_fmt = PIX_FMT_RGB555;
- }
-
- avctx->has_b_frames = 0;
- dsputil_init(&s->dsp, avctx);
-
- s->frame.data[0] = NULL;
-
- return 0;
-}
-
-static void msvideo1_decode_8bit(Msvideo1Context *s)
-{
- int block_ptr, pixel_ptr;
- int total_blocks;
- int pixel_x, pixel_y; /* pixel width and height iterators */
- int block_x, block_y; /* block width and height iterators */
- int blocks_wide, blocks_high; /* width and height in 4x4 blocks */
- int block_inc;
- int row_dec;
-
- /* decoding parameters */
- int stream_ptr;
- unsigned char byte_a, byte_b;
- unsigned short flags;
- int skip_blocks;
- unsigned char colors[8];
- unsigned char *pixels = s->frame.data[0];
- int stride = s->frame.linesize[0];
-
- stream_ptr = 0;
- skip_blocks = 0;
- blocks_wide = s->avctx->width / 4;
- blocks_high = s->avctx->height / 4;
- total_blocks = blocks_wide * blocks_high;
- block_inc = 4;
- row_dec = stride + 4;
-
- for (block_y = blocks_high; block_y > 0; block_y--) {
- block_ptr = ((block_y * 4) - 1) * stride;
- for (block_x = blocks_wide; block_x > 0; block_x--) {
- /* check if this block should be skipped */
- if (skip_blocks) {
- block_ptr += block_inc;
- skip_blocks--;
- total_blocks--;
- continue;
- }
-
- pixel_ptr = block_ptr;
-
- /* get the next two bytes in the encoded data stream */
- CHECK_STREAM_PTR(2);
- byte_a = s->buf[stream_ptr++];
- byte_b = s->buf[stream_ptr++];
-
- /* check if the decode is finished */
- if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0))
- return;
- else if ((byte_b & 0xFC) == 0x84) {
- /* skip code, but don't count the current block */
- skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
- } else if (byte_b < 0x80) {
- /* 2-color encoding */
- flags = (byte_b << 8) | byte_a;
-
- CHECK_STREAM_PTR(2);
- colors[0] = s->buf[stream_ptr++];
- colors[1] = s->buf[stream_ptr++];
-
- for (pixel_y = 0; pixel_y < 4; pixel_y++) {
- for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
- pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
- pixel_ptr -= row_dec;
- }
- } else if (byte_b >= 0x90) {
- /* 8-color encoding */
- flags = (byte_b << 8) | byte_a;
-
- CHECK_STREAM_PTR(8);
- memcpy(colors, &s->buf[stream_ptr], 8);
- stream_ptr += 8;
-
- for (pixel_y = 0; pixel_y < 4; pixel_y++) {
- for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
- pixels[pixel_ptr++] =
- colors[((pixel_y & 0x2) << 1) +
- (pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
- pixel_ptr -= row_dec;
- }
- } else {
- /* 1-color encoding */
- colors[0] = byte_a;
-
- for (pixel_y = 0; pixel_y < 4; pixel_y++) {
- for (pixel_x = 0; pixel_x < 4; pixel_x++)
- pixels[pixel_ptr++] = colors[0];
- pixel_ptr -= row_dec;
- }
- }
-
- block_ptr += block_inc;
- total_blocks--;
- }
- }
-
- /* make the palette available on the way out */
- if (s->avctx->pix_fmt == PIX_FMT_PAL8) {
- memcpy(s->frame.data[1], s->avctx->palctrl->palette, AVPALETTE_SIZE);
- if (s->avctx->palctrl->palette_changed) {
- s->frame.palette_has_changed = 1;
- s->avctx->palctrl->palette_changed = 0;
- }
- }
-}
-
-static void msvideo1_decode_16bit(Msvideo1Context *s)
-{
- int block_ptr, pixel_ptr;
- int total_blocks;
- int pixel_x, pixel_y; /* pixel width and height iterators */
- int block_x, block_y; /* block width and height iterators */
- int blocks_wide, blocks_high; /* width and height in 4x4 blocks */
- int block_inc;
- int row_dec;
-
- /* decoding parameters */
- int stream_ptr;
- unsigned char byte_a, byte_b;
- unsigned short flags;
- int skip_blocks;
- unsigned short colors[8];
- unsigned short *pixels = (unsigned short *)s->frame.data[0];
- int stride = s->frame.linesize[0] / 2;
-
- stream_ptr = 0;
- skip_blocks = 0;
- blocks_wide = s->avctx->width / 4;
- blocks_high = s->avctx->height / 4;
- total_blocks = blocks_wide * blocks_high;
- block_inc = 4;
- row_dec = stride + 4;
-
- for (block_y = blocks_high; block_y > 0; block_y--) {
- block_ptr = ((block_y * 4) - 1) * stride;
- for (block_x = blocks_wide; block_x > 0; block_x--) {
- /* check if this block should be skipped */
- if (skip_blocks) {
- block_ptr += block_inc;
- skip_blocks--;
- total_blocks--;
- continue;
- }
-
- pixel_ptr = block_ptr;
-
- /* get the next two bytes in the encoded data stream */
- CHECK_STREAM_PTR(2);
- byte_a = s->buf[stream_ptr++];
- byte_b = s->buf[stream_ptr++];
-
- /* check if the decode is finished */
- if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0)) {
- return;
- } else if ((byte_b & 0xFC) == 0x84) {
- /* skip code, but don't count the current block */
- skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
- } else if (byte_b < 0x80) {
- /* 2- or 8-color encoding modes */
- flags = (byte_b << 8) | byte_a;
-
- CHECK_STREAM_PTR(4);
- colors[0] = AV_RL16(&s->buf[stream_ptr]);
- stream_ptr += 2;
- colors[1] = AV_RL16(&s->buf[stream_ptr]);
- stream_ptr += 2;
-
- if (colors[0] & 0x8000) {
- /* 8-color encoding */
- CHECK_STREAM_PTR(12);
- colors[2] = AV_RL16(&s->buf[stream_ptr]);
- stream_ptr += 2;
- colors[3] = AV_RL16(&s->buf[stream_ptr]);
- stream_ptr += 2;
- colors[4] = AV_RL16(&s->buf[stream_ptr]);
- stream_ptr += 2;
- colors[5] = AV_RL16(&s->buf[stream_ptr]);
- stream_ptr += 2;
- colors[6] = AV_RL16(&s->buf[stream_ptr]);
- stream_ptr += 2;
- colors[7] = AV_RL16(&s->buf[stream_ptr]);
- stream_ptr += 2;
-
- for (pixel_y = 0; pixel_y < 4; pixel_y++) {
- for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
- pixels[pixel_ptr++] =
- colors[((pixel_y & 0x2) << 1) +
- (pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
- pixel_ptr -= row_dec;
- }
- } else {
- /* 2-color encoding */
- for (pixel_y = 0; pixel_y < 4; pixel_y++) {
- for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
- pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
- pixel_ptr -= row_dec;
- }
- }
- } else {
- /* otherwise, it's a 1-color block */
- colors[0] = (byte_b << 8) | byte_a;
-
- for (pixel_y = 0; pixel_y < 4; pixel_y++) {
- for (pixel_x = 0; pixel_x < 4; pixel_x++)
- pixels[pixel_ptr++] = colors[0];
- pixel_ptr -= row_dec;
- }
- }
-
- block_ptr += block_inc;
- total_blocks--;
- }
- }
-}
-
-static int msvideo1_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
-
- s->buf = buf;
- s->size = buf_size;
-
- s->frame.reference = 1;
- s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
- if (avctx->reget_buffer(avctx, &s->frame)) {
- av_log(s->avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
- return -1;
- }
-
- if (s->mode_8bit)
- msvideo1_decode_8bit(s);
- else
- msvideo1_decode_16bit(s);
-
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = s->frame;
-
- /* report that the buffer was completely consumed */
- return buf_size;
-}
-
-static int msvideo1_decode_end(AVCodecContext *avctx)
-{
- Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
-
- if (s->frame.data[0])
- avctx->release_buffer(avctx, &s->frame);
-
- return 0;
-}
-
-AVCodec msvideo1_decoder = {
- "msvideo1",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MSVIDEO1,
- sizeof(Msvideo1Context),
- msvideo1_decode_init,
- NULL,
- msvideo1_decode_end,
- msvideo1_decode_frame,
- CODEC_CAP_DR1,
-};
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