* Interplay MVE Video Decoder
* Copyright (C) 2003 the ffmpeg project
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * 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,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file interplayvideo.c
+ * @file libavcodec/interplayvideo.c
* Interplay MVE Video Decoder by Mike Melanson (melanson@pcisys.net)
* For more information about the Interplay MVE format, visit:
* http://www.pcisys.net/~melanson/codecs/interplay-mve.txt
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
-#include "common.h"
#include "avcodec.h"
+#include "bytestream.h"
#include "dsputil.h"
+#define ALT_BITSTREAM_READER_LE
+#include "get_bits.h"
#define PALETTE_COUNT 256
/* debugging support */
#define DEBUG_INTERPLAY 0
#if DEBUG_INTERPLAY
-#define debug_interplay printf
+#define debug_interplay(x,...) av_log(NULL, AV_LOG_DEBUG, x, __VA_ARGS__)
#else
static inline void debug_interplay(const char *format, ...) { }
#endif
AVCodecContext *avctx;
DSPContext dsp;
+ AVFrame second_last_frame;
AVFrame last_frame;
AVFrame current_frame;
- int first_frame;
- unsigned char *decoding_map;
+ const unsigned char *decoding_map;
int decoding_map_size;
- unsigned char *buf;
+ const unsigned char *buf;
int size;
- unsigned char palette[PALETTE_COUNT * 4];
+ int is_16bpp;
+ const unsigned char *stream_ptr;
+ const unsigned char *stream_end;
+ const uint8_t *mv_ptr;
+ const uint8_t *mv_end;
+ unsigned char *pixel_ptr;
+ int line_inc;
+ int stride;
+ int upper_motion_limit_offset;
} IpvideoContext;
-#define CHECK_STREAM_PTR(n) \
- if ((sg_stream_ptr + n) > sg_stream_end) { \
- printf ("Interplay video warning: stream_ptr out of bounds (%p >= %p)\n", \
- sg_stream_ptr + n, sg_stream_end); \
- return -1; \
- }
-
-static void ipvideo_new_palette(IpvideoContext *s, unsigned char *palette) {
-
- int i;
- unsigned char r, g, b;
- unsigned int *palette32;
-
- switch (s->avctx->pix_fmt) {
-
- case PIX_FMT_PAL8:
- palette32 = (unsigned int *)s->palette;
- for (i = 0; i < PALETTE_COUNT; i++) {
- r = *palette++;
- g = *palette++;
- b = *palette++;
- palette32[i] = (r << 16) | (g << 8) | (b);
- }
- break;
-
- default:
- printf ("Interplay video: Unhandled video format\n");
- break;
+#define CHECK_STREAM_PTR(stream_ptr, stream_end, n) \
+ if (stream_end - stream_ptr < n) { \
+ av_log(s->avctx, AV_LOG_ERROR, "Interplay video warning: stream_ptr out of bounds (%p >= %p)\n", \
+ stream_ptr + n, stream_end); \
+ return -1; \
}
-}
-static unsigned char *sg_stream_ptr;
-static unsigned char *sg_stream_end;
-static unsigned char *sg_current_plane;
-static unsigned char *sg_output_plane;
-static unsigned char *sg_last_plane;
-static int sg_line_inc;
-static int sg_stride;
-static int sg_upper_motion_limit_offset;
-static DSPContext sg_dsp;
-
-static int ipvideo_decode_block_opcode_0x0_0x1(void)
+static int copy_from(IpvideoContext *s, AVFrame *src, int delta_x, int delta_y)
{
- int x, y;
- unsigned char *src_block;
-
- /* skip block, which actually means to copy from previous frame */
- src_block = sg_last_plane + (sg_output_plane - sg_current_plane);
- for (y = 0; y < 8; y++) {
- for (x = 0; x < 8; x++) {
- *sg_output_plane++ = *src_block++;
- }
- sg_output_plane += sg_line_inc;
- src_block += sg_line_inc;
+ int current_offset = s->pixel_ptr - s->current_frame.data[0];
+ int motion_offset = current_offset + delta_y * s->current_frame.linesize[0]
+ + delta_x * (1 + s->is_16bpp);
+ if (motion_offset < 0) {
+ av_log(s->avctx, AV_LOG_ERROR, " Interplay video: motion offset < 0 (%d)\n", motion_offset);
+ return -1;
+ } else if (motion_offset > s->upper_motion_limit_offset) {
+ av_log(s->avctx, AV_LOG_ERROR, " Interplay video: motion offset above limit (%d >= %d)\n",
+ motion_offset, s->upper_motion_limit_offset);
+ return -1;
}
-
- /* report success */
+ s->dsp.put_pixels_tab[!s->is_16bpp][0](s->pixel_ptr, src->data[0] + motion_offset,
+ s->current_frame.linesize[0], 8);
return 0;
}
-#define COPY_FROM_CURRENT() \
- motion_offset = current_offset; \
- motion_offset += y * sg_stride; \
- motion_offset += x; \
- if (motion_offset < 0) { \
- printf (" Interplay video: motion offset < 0 (%d)\n", motion_offset); \
- return -1; \
- } else if (motion_offset > sg_upper_motion_limit_offset) { \
- printf (" Interplay video: motion offset above limit (%d >= %d)\n", \
- motion_offset, sg_upper_motion_limit_offset); \
- return -1; \
- } \
- sg_dsp.put_pixels_tab[0][0](sg_output_plane, \
- sg_current_plane + motion_offset, sg_stride, 8);
-
-#define COPY_FROM_PREVIOUS() \
- motion_offset = current_offset; \
- motion_offset += y * sg_stride; \
- motion_offset += x; \
- if (motion_offset < 0) { \
- printf (" Interplay video: motion offset < 0 (%d)\n", motion_offset); \
- return -1; \
- } else if (motion_offset > sg_upper_motion_limit_offset) { \
- printf (" Interplay video: motion offset above limit (%d >= %d)\n", \
- motion_offset, sg_upper_motion_limit_offset); \
- return -1; \
- } \
- sg_dsp.put_pixels_tab[0][0](sg_output_plane, \
- sg_last_plane + motion_offset, sg_stride, 8);
+static int ipvideo_decode_block_opcode_0x0(IpvideoContext *s)
+{
+ return copy_from(s, &s->last_frame, 0, 0);
+}
+
+static int ipvideo_decode_block_opcode_0x1(IpvideoContext *s)
+{
+ return copy_from(s, &s->second_last_frame, 0, 0);
+}
-static int ipvideo_decode_block_opcode_0x2(void)
+static int ipvideo_decode_block_opcode_0x2(IpvideoContext *s)
{
unsigned char B;
int x, y;
- int motion_offset;
- int current_offset = sg_output_plane - sg_current_plane;
-
- /* This is the opcode which claims to copy data from within the same
- * frame at a coordinate which has not been rendered yet. Assume that
- * it is supposed to be copied from the previous frame. */
- /* need 1 more byte for motion */
- CHECK_STREAM_PTR(1);
- B = *sg_stream_ptr++;
+ /* copy block from 2 frames ago using a motion vector; need 1 more byte */
+ if (!s->is_16bpp) {
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 1);
+ B = *s->stream_ptr++;
+ } else {
+ CHECK_STREAM_PTR(s->mv_ptr, s->mv_end, 1);
+ B = *s->mv_ptr++;
+ }
if (B < 56) {
x = 8 + (B % 7);
}
debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
- COPY_FROM_PREVIOUS();
-
- /* report success */
- return 0;
+ return copy_from(s, &s->second_last_frame, x, y);
}
-static int ipvideo_decode_block_opcode_0x3(void)
+static int ipvideo_decode_block_opcode_0x3(IpvideoContext *s)
{
unsigned char B;
int x, y;
- int motion_offset;
- int current_offset = sg_output_plane - sg_current_plane;
/* copy 8x8 block from current frame from an up/left block */
/* need 1 more byte for motion */
- CHECK_STREAM_PTR(1);
- B = *sg_stream_ptr++;
+ if (!s->is_16bpp) {
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 1);
+ B = *s->stream_ptr++;
+ } else {
+ CHECK_STREAM_PTR(s->mv_ptr, s->mv_end, 1);
+ B = *s->mv_ptr++;
+ }
if (B < 56) {
x = -(8 + (B % 7));
}
debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
- COPY_FROM_CURRENT();
-
- /* report success */
- return 0;
+ return copy_from(s, &s->current_frame, x, y);
}
-static int ipvideo_decode_block_opcode_0x4(void)
+static int ipvideo_decode_block_opcode_0x4(IpvideoContext *s)
{
int x, y;
unsigned char B, BL, BH;
- int motion_offset;
- int current_offset = sg_output_plane - sg_current_plane;
/* copy a block from the previous frame; need 1 more byte */
- CHECK_STREAM_PTR(1);
+ if (!s->is_16bpp) {
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 1);
+ B = *s->stream_ptr++;
+ } else {
+ CHECK_STREAM_PTR(s->mv_ptr, s->mv_end, 1);
+ B = *s->mv_ptr++;
+ }
- B = *sg_stream_ptr++;
BL = B & 0x0F;
BH = (B >> 4) & 0x0F;
x = -8 + BL;
y = -8 + BH;
debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
- COPY_FROM_PREVIOUS();
-
- /* report success */
- return 0;
+ return copy_from(s, &s->last_frame, x, y);
}
-static int ipvideo_decode_block_opcode_0x5(void)
+static int ipvideo_decode_block_opcode_0x5(IpvideoContext *s)
{
signed char x, y;
- int motion_offset;
- int current_offset = sg_output_plane - sg_current_plane;
/* copy a block from the previous frame using an expanded range;
* need 2 more bytes */
- CHECK_STREAM_PTR(2);
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
- x = *sg_stream_ptr++;
- y = *sg_stream_ptr++;
+ x = *s->stream_ptr++;
+ y = *s->stream_ptr++;
debug_interplay (" motion bytes = %d, %d\n", x, y);
- COPY_FROM_PREVIOUS();
-
- /* report success */
- return 0;
+ return copy_from(s, &s->last_frame, x, y);
}
-static int ipvideo_decode_block_opcode_0x6(void)
+static int ipvideo_decode_block_opcode_0x6(IpvideoContext *s)
{
/* mystery opcode? skip multiple blocks? */
- printf (" Interplay video: Help! Mystery opcode 0x6 seen\n");
+ av_log(s->avctx, AV_LOG_ERROR, " Interplay video: Help! Mystery opcode 0x6 seen\n");
/* report success */
return 0;
}
-static int ipvideo_decode_block_opcode_0x7(void)
+static int ipvideo_decode_block_opcode_0x7(IpvideoContext *s)
{
int x, y;
- unsigned char P0, P1;
- unsigned char B[8];
+ unsigned char P[2];
unsigned int flags;
- int bitmask;
/* 2-color encoding */
- CHECK_STREAM_PTR(2);
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
- P0 = *sg_stream_ptr++;
- P1 = *sg_stream_ptr++;
+ P[0] = *s->stream_ptr++;
+ P[1] = *s->stream_ptr++;
- if (P0 <= P1) {
+ if (P[0] <= P[1]) {
/* need 8 more bytes from the stream */
- CHECK_STREAM_PTR(8);
- for (y = 0; y < 8; y++)
- B[y] = *sg_stream_ptr++;
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
for (y = 0; y < 8; y++) {
- flags = B[y];
- for (x = 0x80; x != 0; x >>= 1) {
- if (flags & x)
- *sg_output_plane++ = P1;
- else
- *sg_output_plane++ = P0;
- }
- sg_output_plane += sg_line_inc;
+ flags = *s->stream_ptr++ | 0x100;
+ for (; flags != 1; flags >>= 1)
+ *s->pixel_ptr++ = P[flags & 1];
+ s->pixel_ptr += s->line_inc;
}
} else {
/* need 2 more bytes from the stream */
- CHECK_STREAM_PTR(2);
- B[0] = *sg_stream_ptr++;
- B[1] = *sg_stream_ptr++;
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
- flags = (B[0] << 8) | B[1];
- bitmask = 0x8000;
+ flags = bytestream_get_le16(&s->stream_ptr);
for (y = 0; y < 8; y += 2) {
- for (x = 0; x < 8; x += 2, bitmask >>= 1) {
- if (flags & bitmask) {
- *(sg_output_plane + x) = P0;
- *(sg_output_plane + x + 1) = P0;
- *(sg_output_plane + sg_stride + x) = P0;
- *(sg_output_plane + sg_stride + x + 1) = P0;
- } else {
- *(sg_output_plane + x) = P1;
- *(sg_output_plane + x + 1) = P1;
- *(sg_output_plane + sg_stride + x) = P1;
- *(sg_output_plane + sg_stride + x + 1) = P1;
- }
+ for (x = 0; x < 8; x += 2, flags >>= 1) {
+ s->pixel_ptr[x ] =
+ s->pixel_ptr[x + 1 ] =
+ s->pixel_ptr[x + s->stride] =
+ s->pixel_ptr[x + 1 + s->stride] = P[flags & 1];
}
- sg_output_plane += sg_stride * 2;
+ s->pixel_ptr += s->stride * 2;
}
}
return 0;
}
-static int ipvideo_decode_block_opcode_0x8(void)
+static int ipvideo_decode_block_opcode_0x8(IpvideoContext *s)
{
int x, y;
- unsigned char P[8];
- unsigned char B[8];
+ unsigned char P[2];
unsigned int flags = 0;
- unsigned int bitmask = 0;
- unsigned char P0 = 0, P1 = 0;
- int lower_half = 0;
/* 2-color encoding for each 4x4 quadrant, or 2-color encoding on
* either top and bottom or left and right halves */
- CHECK_STREAM_PTR(2);
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
- P[0] = *sg_stream_ptr++;
- P[1] = *sg_stream_ptr++;
+ P[0] = *s->stream_ptr++;
+ P[1] = *s->stream_ptr++;
if (P[0] <= P[1]) {
- /* need 12 more bytes */
- CHECK_STREAM_PTR(12);
- B[0] = *sg_stream_ptr++; B[1] = *sg_stream_ptr++;
- P[2] = *sg_stream_ptr++; P[3] = *sg_stream_ptr++;
- B[2] = *sg_stream_ptr++; B[3] = *sg_stream_ptr++;
- P[4] = *sg_stream_ptr++; P[5] = *sg_stream_ptr++;
- B[4] = *sg_stream_ptr++; B[5] = *sg_stream_ptr++;
- P[6] = *sg_stream_ptr++; P[7] = *sg_stream_ptr++;
- B[6] = *sg_stream_ptr++; B[7] = *sg_stream_ptr++;
-
- for (y = 0; y < 8; y++) {
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 14);
+ s->stream_ptr -= 2;
- /* time to reload flags? */
- if (y == 0) {
- flags =
- ((B[0] & 0xF0) << 24) | ((B[4] & 0xF0) << 20) |
- ((B[0] & 0x0F) << 20) | ((B[4] & 0x0F) << 16) |
- ((B[1] & 0xF0) << 8) | ((B[5] & 0xF0) << 4) |
- ((B[1] & 0x0F) << 4) | ((B[5] & 0x0F) << 0);
- bitmask = 0x80000000;
- lower_half = 0; /* still on top half */
- } else if (y == 4) {
- flags =
- ((B[2] & 0xF0) << 24) | ((B[6] & 0xF0) << 20) |
- ((B[2] & 0x0F) << 20) | ((B[6] & 0x0F) << 16) |
- ((B[3] & 0xF0) << 8) | ((B[7] & 0xF0) << 4) |
- ((B[3] & 0x0F) << 4) | ((B[7] & 0x0F) << 0);
- bitmask = 0x80000000;
- lower_half = 4;
+ for (y = 0; y < 16; y++) {
+ // new values for each 4x4 block
+ if (!(y & 3)) {
+ P[0] = *s->stream_ptr++; P[1] = *s->stream_ptr++;
+ flags = bytestream_get_le16(&s->stream_ptr);
}
- for (x = 0; x < 8; x++, bitmask >>= 1) {
- /* get the pixel values ready for this quadrant */
- if (x == 0) {
- P0 = P[lower_half + 0];
- P1 = P[lower_half + 1];
- } else if (x == 4) {
- P0 = P[lower_half + 2];
- P1 = P[lower_half + 3];
- }
-
- if (flags & bitmask)
- *sg_output_plane++ = P1;
- else
- *sg_output_plane++ = P0;
- }
- sg_output_plane += sg_line_inc;
+ for (x = 0; x < 4; x++, flags >>= 1)
+ *s->pixel_ptr++ = P[flags & 1];
+ s->pixel_ptr += s->stride - 4;
+ // switch to right half
+ if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
}
} else {
/* need 10 more bytes */
- CHECK_STREAM_PTR(10);
- B[0] = *sg_stream_ptr++; B[1] = *sg_stream_ptr++;
- B[2] = *sg_stream_ptr++; B[3] = *sg_stream_ptr++;
- P[2] = *sg_stream_ptr++; P[3] = *sg_stream_ptr++;
- B[4] = *sg_stream_ptr++; B[5] = *sg_stream_ptr++;
- B[6] = *sg_stream_ptr++; B[7] = *sg_stream_ptr++;
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 10);
- if (P[2] <= P[3]) {
+ if (s->stream_ptr[4] <= s->stream_ptr[5]) {
- /* vertical split; left & right halves are 2-color encoded */
-
- for (y = 0; y < 8; y++) {
+ flags = bytestream_get_le32(&s->stream_ptr);
- /* time to reload flags? */
- if (y == 0) {
- flags =
- ((B[0] & 0xF0) << 24) | ((B[4] & 0xF0) << 20) |
- ((B[0] & 0x0F) << 20) | ((B[4] & 0x0F) << 16) |
- ((B[1] & 0xF0) << 8) | ((B[5] & 0xF0) << 4) |
- ((B[1] & 0x0F) << 4) | ((B[5] & 0x0F) << 0);
- bitmask = 0x80000000;
- } else if (y == 4) {
- flags =
- ((B[2] & 0xF0) << 24) | ((B[6] & 0xF0) << 20) |
- ((B[2] & 0x0F) << 20) | ((B[6] & 0x0F) << 16) |
- ((B[3] & 0xF0) << 8) | ((B[7] & 0xF0) << 4) |
- ((B[3] & 0x0F) << 4) | ((B[7] & 0x0F) << 0);
- bitmask = 0x80000000;
- }
+ /* vertical split; left & right halves are 2-color encoded */
- for (x = 0; x < 8; x++, bitmask >>= 1) {
- /* get the pixel values ready for this half */
- if (x == 0) {
- P0 = P[0];
- P1 = P[1];
- } else if (x == 4) {
- P0 = P[2];
- P1 = P[3];
- }
-
- if (flags & bitmask)
- *sg_output_plane++ = P0;
- else
- *sg_output_plane++ = P1;
+ for (y = 0; y < 16; y++) {
+ for (x = 0; x < 4; x++, flags >>= 1)
+ *s->pixel_ptr++ = P[flags & 1];
+ s->pixel_ptr += s->stride - 4;
+ // switch to right half
+ if (y == 7) {
+ s->pixel_ptr -= 8 * s->stride - 4;
+ P[0] = *s->stream_ptr++; P[1] = *s->stream_ptr++;
+ flags = bytestream_get_le32(&s->stream_ptr);
}
- sg_output_plane += sg_line_inc;
}
} else {
/* horizontal split; top & bottom halves are 2-color encoded */
for (y = 0; y < 8; y++) {
-
- flags = B[y];
- if (y == 0) {
- P0 = P[0];
- P1 = P[1];
- } else if (y == 4) {
- P0 = P[2];
- P1 = P[3];
+ if (y == 4) {
+ P[0] = *s->stream_ptr++;
+ P[1] = *s->stream_ptr++;
}
+ flags = *s->stream_ptr++ | 0x100;
- for (bitmask = 0x80; bitmask != 0; bitmask >>= 1) {
-
- if (flags & bitmask)
- *sg_output_plane++ = P0;
- else
- *sg_output_plane++ = P1;
- }
- sg_output_plane += sg_line_inc;
+ for (; flags != 1; flags >>= 1)
+ *s->pixel_ptr++ = P[flags & 1];
+ s->pixel_ptr += s->line_inc;
}
}
}
return 0;
}
-static int ipvideo_decode_block_opcode_0x9(void)
+static int ipvideo_decode_block_opcode_0x9(IpvideoContext *s)
{
int x, y;
unsigned char P[4];
- unsigned int flags = 0;
- int shifter = 0;
- unsigned char pix;
/* 4-color encoding */
- CHECK_STREAM_PTR(4);
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
- for (y = 0; y < 4; y++)
- P[y] = *sg_stream_ptr++;
+ memcpy(P, s->stream_ptr, 4);
+ s->stream_ptr += 4;
- if ((P[0] <= P[1]) && (P[2] <= P[3])) {
+ if (P[0] <= P[1]) {
+ if (P[2] <= P[3]) {
- /* 1 of 4 colors for each pixel, need 16 more bytes */
- CHECK_STREAM_PTR(16);
+ /* 1 of 4 colors for each pixel, need 16 more bytes */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 16);
- for (y = 0; y < 8; y++) {
- /* get the next set of 8 2-bit flags */
- flags = (sg_stream_ptr[0] << 8) | sg_stream_ptr[1];
- sg_stream_ptr += 2;
- for (x = 0, shifter = 14; x < 8; x++, shifter -= 2) {
- *sg_output_plane++ = P[(flags >> shifter) & 0x03];
+ for (y = 0; y < 8; y++) {
+ /* get the next set of 8 2-bit flags */
+ int flags = bytestream_get_le16(&s->stream_ptr);
+ for (x = 0; x < 8; x++, flags >>= 2)
+ *s->pixel_ptr++ = P[flags & 0x03];
+ s->pixel_ptr += s->line_inc;
}
- sg_output_plane += sg_line_inc;
- }
- } else if ((P[0] <= P[1]) && (P[2] > P[3])) {
+ } else {
+ uint32_t flags;
- /* 1 of 4 colors for each 2x2 block, need 4 more bytes */
- CHECK_STREAM_PTR(4);
+ /* 1 of 4 colors for each 2x2 block, need 4 more bytes */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
- flags = 0;
- flags = (flags << 8) | *sg_stream_ptr++;
- flags = (flags << 8) | *sg_stream_ptr++;
- flags = (flags << 8) | *sg_stream_ptr++;
- flags = (flags << 8) | *sg_stream_ptr++;
- shifter = 30;
+ flags = bytestream_get_le32(&s->stream_ptr);
- for (y = 0; y < 8; y += 2) {
- for (x = 0; x < 8; x += 2, shifter -= 2) {
- pix = P[(flags >> shifter) & 0x03];
- *(sg_output_plane + x) = pix;
- *(sg_output_plane + x + 1) = pix;
- *(sg_output_plane + sg_stride + x) = pix;
- *(sg_output_plane + sg_stride + x + 1) = pix;
+ for (y = 0; y < 8; y += 2) {
+ for (x = 0; x < 8; x += 2, flags >>= 2) {
+ s->pixel_ptr[x ] =
+ s->pixel_ptr[x + 1 ] =
+ s->pixel_ptr[x + s->stride] =
+ s->pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];
+ }
+ s->pixel_ptr += s->stride * 2;
}
- sg_output_plane += sg_stride * 2;
- }
- } else if ((P[0] > P[1]) && (P[2] <= P[3])) {
+ }
+ } else {
+ uint64_t flags;
- /* 1 of 4 colors for each 2x1 block, need 8 more bytes */
- CHECK_STREAM_PTR(8);
+ /* 1 of 4 colors for each 2x1 or 1x2 block, need 8 more bytes */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
- for (y = 0; y < 8; y++) {
- /* time to reload flags? */
- if ((y == 0) || (y == 4)) {
- flags = 0;
- flags = (flags << 8) | *sg_stream_ptr++;
- flags = (flags << 8) | *sg_stream_ptr++;
- flags = (flags << 8) | *sg_stream_ptr++;
- flags = (flags << 8) | *sg_stream_ptr++;
- shifter = 30;
+ flags = bytestream_get_le64(&s->stream_ptr);
+ if (P[2] <= P[3]) {
+ for (y = 0; y < 8; y++) {
+ for (x = 0; x < 8; x += 2, flags >>= 2) {
+ s->pixel_ptr[x ] =
+ s->pixel_ptr[x + 1] = P[flags & 0x03];
+ }
+ s->pixel_ptr += s->stride;
}
- for (x = 0; x < 8; x += 2, shifter -= 2) {
- pix = P[(flags >> shifter) & 0x03];
- *(sg_output_plane + x) = pix;
- *(sg_output_plane + x + 1) = pix;
+ } else {
+ for (y = 0; y < 8; y += 2) {
+ for (x = 0; x < 8; x++, flags >>= 2) {
+ s->pixel_ptr[x ] =
+ s->pixel_ptr[x + s->stride] = P[flags & 0x03];
+ }
+ s->pixel_ptr += s->stride * 2;
}
- sg_output_plane += sg_stride;
}
+ }
- } else {
+ /* report success */
+ return 0;
+}
- /* 1 of 4 colors for each 1x2 block, need 8 more bytes */
- CHECK_STREAM_PTR(8);
+static int ipvideo_decode_block_opcode_0xA(IpvideoContext *s)
+{
+ int x, y;
+ unsigned char P[4];
+ int flags = 0;
- for (y = 0; y < 8; y += 2) {
- /* time to reload flags? */
- if ((y == 0) || (y == 4)) {
- flags = 0;
- flags = (flags << 8) | *sg_stream_ptr++;
- flags = (flags << 8) | *sg_stream_ptr++;
- flags = (flags << 8) | *sg_stream_ptr++;
- flags = (flags << 8) | *sg_stream_ptr++;
- shifter = 30;
+ /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
+ * either top and bottom or left and right halves */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 24);
+
+ if (s->stream_ptr[0] <= s->stream_ptr[1]) {
+
+ /* 4-color encoding for each quadrant; need 32 bytes */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 32);
+
+ for (y = 0; y < 16; y++) {
+ // new values for each 4x4 block
+ if (!(y & 3)) {
+ memcpy(P, s->stream_ptr, 4);
+ s->stream_ptr += 4;
+ flags = bytestream_get_le32(&s->stream_ptr);
}
- for (x = 0; x < 8; x++, shifter -= 2) {
- pix = P[(flags >> shifter) & 0x03];
- *(sg_output_plane + x) = pix;
- *(sg_output_plane + sg_stride + x) = pix;
+
+ for (x = 0; x < 4; x++, flags >>= 2)
+ *s->pixel_ptr++ = P[flags & 0x03];
+
+ s->pixel_ptr += s->stride - 4;
+ // switch to right half
+ if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
+ }
+
+ } else {
+ // vertical split?
+ int vert = s->stream_ptr[12] <= s->stream_ptr[13];
+ uint64_t flags = 0;
+
+ /* 4-color encoding for either left and right or top and bottom
+ * halves */
+
+ for (y = 0; y < 16; y++) {
+ // load values for each half
+ if (!(y & 7)) {
+ memcpy(P, s->stream_ptr, 4);
+ s->stream_ptr += 4;
+ flags = bytestream_get_le64(&s->stream_ptr);
}
- sg_output_plane += sg_stride * 2;
+
+ for (x = 0; x < 4; x++, flags >>= 2)
+ *s->pixel_ptr++ = P[flags & 0x03];
+
+ if (vert) {
+ s->pixel_ptr += s->stride - 4;
+ // switch to right half
+ if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
+ } else if (y & 1) s->pixel_ptr += s->line_inc;
}
}
return 0;
}
-static int ipvideo_decode_block_opcode_0xA(void)
+static int ipvideo_decode_block_opcode_0xB(IpvideoContext *s)
+{
+ int y;
+
+ /* 64-color encoding (each pixel in block is a different color) */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 64);
+
+ for (y = 0; y < 8; y++) {
+ memcpy(s->pixel_ptr, s->stream_ptr, 8);
+ s->stream_ptr += 8;
+ s->pixel_ptr += s->stride;
+ }
+
+ /* report success */
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0xC(IpvideoContext *s)
{
int x, y;
- unsigned char P[16];
- unsigned char B[16];
- int flags = 0;
- int shifter = 0;
- int index;
- int split;
- int lower_half;
- /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
- * either top and bottom or left and right halves */
- CHECK_STREAM_PTR(4);
+ /* 16-color block encoding: each 2x2 block is a different color */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 16);
- for (y = 0; y < 4; y++)
- P[y] = *sg_stream_ptr++;
+ for (y = 0; y < 8; y += 2) {
+ for (x = 0; x < 8; x += 2) {
+ s->pixel_ptr[x ] =
+ s->pixel_ptr[x + 1 ] =
+ s->pixel_ptr[x + s->stride] =
+ s->pixel_ptr[x + 1 + s->stride] = *s->stream_ptr++;
+ }
+ s->pixel_ptr += s->stride * 2;
+ }
- if (P[0] <= P[1]) {
+ /* report success */
+ return 0;
+}
- /* 4-color encoding for each quadrant; need 28 more bytes */
- CHECK_STREAM_PTR(28);
+static int ipvideo_decode_block_opcode_0xD(IpvideoContext *s)
+{
+ int y;
+ unsigned char P[2];
- for (y = 0; y < 4; y++)
- B[y] = *sg_stream_ptr++;
- for (y = 4; y < 16; y += 4) {
- for (x = y; x < y + 4; x++)
- P[x] = *sg_stream_ptr++;
- for (x = y; x < y + 4; x++)
- B[x] = *sg_stream_ptr++;
+ /* 4-color block encoding: each 4x4 block is a different color */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
+
+ for (y = 0; y < 8; y++) {
+ if (!(y & 3)) {
+ P[0] = *s->stream_ptr++;
+ P[1] = *s->stream_ptr++;
}
+ memset(s->pixel_ptr, P[0], 4);
+ memset(s->pixel_ptr + 4, P[1], 4);
+ s->pixel_ptr += s->stride;
+ }
+
+ /* report success */
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0xE(IpvideoContext *s)
+{
+ int y;
+ unsigned char pix;
+
+ /* 1-color encoding: the whole block is 1 solid color */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 1);
+ pix = *s->stream_ptr++;
+
+ for (y = 0; y < 8; y++) {
+ memset(s->pixel_ptr, pix, 8);
+ s->pixel_ptr += s->stride;
+ }
+
+ /* report success */
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0xF(IpvideoContext *s)
+{
+ int x, y;
+ unsigned char sample[2];
+
+ /* dithered encoding */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
+ sample[0] = *s->stream_ptr++;
+ sample[1] = *s->stream_ptr++;
+
+ for (y = 0; y < 8; y++) {
+ for (x = 0; x < 8; x += 2) {
+ *s->pixel_ptr++ = sample[ y & 1 ];
+ *s->pixel_ptr++ = sample[!(y & 1)];
+ }
+ s->pixel_ptr += s->line_inc;
+ }
+
+ /* report success */
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0x6_16(IpvideoContext *s)
+{
+ signed char x, y;
+
+ /* copy a block from the second last frame using an expanded range */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
+
+ x = *s->stream_ptr++;
+ y = *s->stream_ptr++;
+
+ debug_interplay (" motion bytes = %d, %d\n", x, y);
+ return copy_from(s, &s->second_last_frame, x, y);
+}
+
+static int ipvideo_decode_block_opcode_0x7_16(IpvideoContext *s)
+{
+ int x, y;
+ uint16_t P[2];
+ unsigned int flags;
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
+
+ /* 2-color encoding */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
+
+ P[0] = bytestream_get_le16(&s->stream_ptr);
+ P[1] = bytestream_get_le16(&s->stream_ptr);
+
+ if (!(P[0] & 0x8000)) {
+
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
for (y = 0; y < 8; y++) {
+ flags = *s->stream_ptr++ | 0x100;
+ for (; flags != 1; flags >>= 1)
+ *pixel_ptr++ = P[flags & 1];
+ pixel_ptr += s->line_inc;
+ }
+
+ } else {
- lower_half = (y >= 4) ? 4 : 0;
- flags = (B[y] << 8) | B[y + 8];
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
- for (x = 0, shifter = 14; x < 8; x++, shifter -= 2) {
- split = (x >= 4) ? 8 : 0;
- index = split + lower_half + ((flags >> shifter) & 0x03);
- *sg_output_plane++ = P[index];
+ flags = bytestream_get_le16(&s->stream_ptr);
+ for (y = 0; y < 8; y += 2) {
+ for (x = 0; x < 8; x += 2, flags >>= 1) {
+ pixel_ptr[x ] =
+ pixel_ptr[x + 1 ] =
+ pixel_ptr[x + s->stride] =
+ pixel_ptr[x + 1 + s->stride] = P[flags & 1];
}
+ pixel_ptr += s->stride * 2;
+ }
+ }
- sg_output_plane += sg_line_inc;
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0x8_16(IpvideoContext *s)
+{
+ int x, y;
+ uint16_t P[2];
+ unsigned int flags = 0;
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
+
+ /* 2-color encoding for each 4x4 quadrant, or 2-color encoding on
+ * either top and bottom or left and right halves */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
+
+ P[0] = bytestream_get_le16(&s->stream_ptr);
+ P[1] = bytestream_get_le16(&s->stream_ptr);
+
+ if (!(P[0] & 0x8000)) {
+
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 24);
+ s->stream_ptr -= 4;
+
+ for (y = 0; y < 16; y++) {
+ // new values for each 4x4 block
+ if (!(y & 3)) {
+ P[0] = bytestream_get_le16(&s->stream_ptr);
+ P[1] = bytestream_get_le16(&s->stream_ptr);
+ flags = bytestream_get_le16(&s->stream_ptr);
+ }
+
+ for (x = 0; x < 4; x++, flags >>= 1)
+ *pixel_ptr++ = P[flags & 1];
+ pixel_ptr += s->stride - 4;
+ // switch to right half
+ if (y == 7) pixel_ptr -= 8 * s->stride - 4;
}
} else {
- /* 4-color encoding for either left and right or top and bottom
- * halves; need 20 more bytes */
- CHECK_STREAM_PTR(20);
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 12);
- for (y = 0; y < 8; y++)
- B[y] = *sg_stream_ptr++;
- for (y = 4; y < 8; y++)
- P[y] = *sg_stream_ptr++;
- for (y = 8; y < 16; y++)
- B[y] = *sg_stream_ptr++;
+ if (!(AV_RL16(s->stream_ptr + 4) & 0x8000)) {
- if (P[4] <= P[5]) {
+ flags = bytestream_get_le32(&s->stream_ptr);
- /* block is divided into left and right halves */
- for (y = 0; y < 8; y++) {
+ /* vertical split; left & right halves are 2-color encoded */
- flags = (B[y] << 8) | B[y + 8];
- split = 0;
+ for (y = 0; y < 16; y++) {
+ for (x = 0; x < 4; x++, flags >>= 1)
+ *pixel_ptr++ = P[flags & 1];
+ pixel_ptr += s->stride - 4;
+ // switch to right half
+ if (y == 7) {
+ pixel_ptr -= 8 * s->stride - 4;
+ P[0] = bytestream_get_le16(&s->stream_ptr);
+ P[1] = bytestream_get_le16(&s->stream_ptr);
+ flags = bytestream_get_le32(&s->stream_ptr);
+ }
+ }
- for (x = 0, shifter = 14; x < 8; x++, shifter -= 2) {
- if (x == 4)
- split = 4;
- *sg_output_plane++ = P[split + ((flags >> shifter) & 0x03)];
+ } else {
+
+ /* horizontal split; top & bottom halves are 2-color encoded */
+
+ for (y = 0; y < 8; y++) {
+ if (y == 4) {
+ P[0] = bytestream_get_le16(&s->stream_ptr);
+ P[1] = bytestream_get_le16(&s->stream_ptr);
}
+ flags = *s->stream_ptr++ | 0x100;
- sg_output_plane += sg_line_inc;
+ for (; flags != 1; flags >>= 1)
+ *pixel_ptr++ = P[flags & 1];
+ pixel_ptr += s->line_inc;
}
+ }
+ }
- } else {
+ /* report success */
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0x9_16(IpvideoContext *s)
+{
+ int x, y;
+ uint16_t P[4];
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
+
+ /* 4-color encoding */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
+
+ for (x = 0; x < 4; x++)
+ P[x] = bytestream_get_le16(&s->stream_ptr);
+
+ if (!(P[0] & 0x8000)) {
+ if (!(P[2] & 0x8000)) {
+
+ /* 1 of 4 colors for each pixel */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 16);
- /* block is divided into top and bottom halves */
- split = 0;
for (y = 0; y < 8; y++) {
+ /* get the next set of 8 2-bit flags */
+ int flags = bytestream_get_le16(&s->stream_ptr);
+ for (x = 0; x < 8; x++, flags >>= 2)
+ *pixel_ptr++ = P[flags & 0x03];
+ pixel_ptr += s->line_inc;
+ }
+
+ } else {
+ uint32_t flags;
+
+ /* 1 of 4 colors for each 2x2 block */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 4);
+
+ flags = bytestream_get_le32(&s->stream_ptr);
- flags = (B[y * 2] << 8) | B[y * 2 + 1];
- if (y == 4)
- split = 4;
+ for (y = 0; y < 8; y += 2) {
+ for (x = 0; x < 8; x += 2, flags >>= 2) {
+ pixel_ptr[x ] =
+ pixel_ptr[x + 1 ] =
+ pixel_ptr[x + s->stride] =
+ pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];
+ }
+ pixel_ptr += s->stride * 2;
+ }
+
+ }
+ } else {
+ uint64_t flags;
- for (x = 0, shifter = 14; x < 8; x++, shifter -= 2)
- *sg_output_plane++ = P[split + ((flags >> shifter) & 0x03)];
+ /* 1 of 4 colors for each 2x1 or 1x2 block */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
- sg_output_plane += sg_line_inc;
+ flags = bytestream_get_le64(&s->stream_ptr);
+ if (!(P[2] & 0x8000)) {
+ for (y = 0; y < 8; y++) {
+ for (x = 0; x < 8; x += 2, flags >>= 2) {
+ pixel_ptr[x ] =
+ pixel_ptr[x + 1] = P[flags & 0x03];
+ }
+ pixel_ptr += s->stride;
+ }
+ } else {
+ for (y = 0; y < 8; y += 2) {
+ for (x = 0; x < 8; x++, flags >>= 2) {
+ pixel_ptr[x ] =
+ pixel_ptr[x + s->stride] = P[flags & 0x03];
+ }
+ pixel_ptr += s->stride * 2;
}
}
}
return 0;
}
-static int ipvideo_decode_block_opcode_0xB(void)
+static int ipvideo_decode_block_opcode_0xA_16(IpvideoContext *s)
{
int x, y;
+ uint16_t P[4];
+ int flags = 0;
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
- /* 64-color encoding (each pixel in block is a different color) */
- CHECK_STREAM_PTR(64);
+ /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
+ * either top and bottom or left and right halves */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 24);
- for (y = 0; y < 8; y++) {
- for (x = 0; x < 8; x++) {
- *sg_output_plane++ = *sg_stream_ptr++;
+ if (!(AV_RL16(s->stream_ptr) & 0x8000)) {
+
+ /* 4-color encoding for each quadrant */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 48);
+
+ for (y = 0; y < 16; y++) {
+ // new values for each 4x4 block
+ if (!(y & 3)) {
+ for (x = 0; x < 4; x++)
+ P[x] = bytestream_get_le16(&s->stream_ptr);
+ flags = bytestream_get_le32(&s->stream_ptr);
+ }
+
+ for (x = 0; x < 4; x++, flags >>= 2)
+ *pixel_ptr++ = P[flags & 0x03];
+
+ pixel_ptr += s->stride - 4;
+ // switch to right half
+ if (y == 7) pixel_ptr -= 8 * s->stride - 4;
+ }
+
+ } else {
+ // vertical split?
+ int vert = !(AV_RL16(s->stream_ptr + 16) & 0x8000);
+ uint64_t flags = 0;
+
+ /* 4-color encoding for either left and right or top and bottom
+ * halves */
+
+ for (y = 0; y < 16; y++) {
+ // load values for each half
+ if (!(y & 7)) {
+ for (x = 0; x < 4; x++)
+ P[x] = bytestream_get_le16(&s->stream_ptr);
+ flags = bytestream_get_le64(&s->stream_ptr);
+ }
+
+ for (x = 0; x < 4; x++, flags >>= 2)
+ *pixel_ptr++ = P[flags & 0x03];
+
+ if (vert) {
+ pixel_ptr += s->stride - 4;
+ // switch to right half
+ if (y == 7) pixel_ptr -= 8 * s->stride - 4;
+ } else if (y & 1) pixel_ptr += s->line_inc;
}
- sg_output_plane += sg_line_inc;
}
/* report success */
return 0;
}
-static int ipvideo_decode_block_opcode_0xC(void)
+static int ipvideo_decode_block_opcode_0xB_16(IpvideoContext *s)
{
int x, y;
- unsigned char pix;
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
- /* 16-color block encoding: each 2x2 block is a different color */
- CHECK_STREAM_PTR(16);
+ /* 64-color encoding (each pixel in block is a different color) */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 128);
- for (y = 0; y < 8; y += 2) {
- for (x = 0; x < 8; x += 2) {
- pix = *sg_stream_ptr++;
- *(sg_output_plane + x) = pix;
- *(sg_output_plane + x + 1) = pix;
- *(sg_output_plane + sg_stride + x) = pix;
- *(sg_output_plane + sg_stride + x + 1) = pix;
- }
- sg_output_plane += sg_stride * 2;
+ for (y = 0; y < 8; y++) {
+ for (x = 0; x < 8; x++)
+ pixel_ptr[x] = bytestream_get_le16(&s->stream_ptr);
+ pixel_ptr += s->stride;
}
/* report success */
return 0;
}
-static int ipvideo_decode_block_opcode_0xD(void)
+static int ipvideo_decode_block_opcode_0xC_16(IpvideoContext *s)
{
int x, y;
- unsigned char P[4];
- unsigned char index = 0;
-
- /* 4-color block encoding: each 4x4 block is a different color */
- CHECK_STREAM_PTR(4);
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
- for (y = 0; y < 4; y++)
- P[y] = *sg_stream_ptr++;
+ /* 16-color block encoding: each 2x2 block is a different color */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 32);
- for (y = 0; y < 8; y++) {
- if (y < 4)
- index = 0;
- else
- index = 2;
-
- for (x = 0; x < 8; x++) {
- if (x == 4)
- index++;
- *sg_output_plane++ = P[index];
+ for (y = 0; y < 8; y += 2) {
+ for (x = 0; x < 8; x += 2) {
+ pixel_ptr[x ] =
+ pixel_ptr[x + 1 ] =
+ pixel_ptr[x + s->stride] =
+ pixel_ptr[x + 1 + s->stride] = bytestream_get_le16(&s->stream_ptr);
}
- sg_output_plane += sg_line_inc;
+ pixel_ptr += s->stride * 2;
}
/* report success */
return 0;
}
-static int ipvideo_decode_block_opcode_0xE(void)
+static int ipvideo_decode_block_opcode_0xD_16(IpvideoContext *s)
{
int x, y;
- unsigned char pix;
+ uint16_t P[2];
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
- /* 1-color encoding: the whole block is 1 solid color */
- CHECK_STREAM_PTR(1);
- pix = *sg_stream_ptr++;
+ /* 4-color block encoding: each 4x4 block is a different color */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 8);
for (y = 0; y < 8; y++) {
- for (x = 0; x < 8; x++) {
- *sg_output_plane++ = pix;
+ if (!(y & 3)) {
+ P[0] = bytestream_get_le16(&s->stream_ptr);
+ P[1] = bytestream_get_le16(&s->stream_ptr);
}
- sg_output_plane += sg_line_inc;
+ for (x = 0; x < 8; x++)
+ pixel_ptr[x] = P[x >> 2];
+ pixel_ptr += s->stride;
}
/* report success */
return 0;
}
-static int ipvideo_decode_block_opcode_0xF(void)
+static int ipvideo_decode_block_opcode_0xE_16(IpvideoContext *s)
{
int x, y;
- unsigned char sample0, sample1;
+ uint16_t pix;
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
- /* dithered encoding */
- CHECK_STREAM_PTR(2);
- sample0 = *sg_stream_ptr++;
- sample1 = *sg_stream_ptr++;
+ /* 1-color encoding: the whole block is 1 solid color */
+ CHECK_STREAM_PTR(s->stream_ptr, s->stream_end, 2);
+ pix = bytestream_get_le16(&s->stream_ptr);
for (y = 0; y < 8; y++) {
- for (x = 0; x < 8; x += 2) {
- if (y & 1) {
- *sg_output_plane++ = sample1;
- *sg_output_plane++ = sample0;
- } else {
- *sg_output_plane++ = sample0;
- *sg_output_plane++ = sample1;
- }
- }
- sg_output_plane += sg_line_inc;
+ for (x = 0; x < 8; x++)
+ pixel_ptr[x] = pix;
+ pixel_ptr += s->stride;
}
/* report success */
return 0;
}
-static int (*ipvideo_decode_block[16])(void);
+static int (* const ipvideo_decode_block[])(IpvideoContext *s) = {
+ ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1,
+ ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3,
+ ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5,
+ ipvideo_decode_block_opcode_0x6, ipvideo_decode_block_opcode_0x7,
+ ipvideo_decode_block_opcode_0x8, ipvideo_decode_block_opcode_0x9,
+ ipvideo_decode_block_opcode_0xA, ipvideo_decode_block_opcode_0xB,
+ ipvideo_decode_block_opcode_0xC, ipvideo_decode_block_opcode_0xD,
+ ipvideo_decode_block_opcode_0xE, ipvideo_decode_block_opcode_0xF,
+};
+
+static int (* const ipvideo_decode_block16[])(IpvideoContext *s) = {
+ ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1,
+ ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3,
+ ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5,
+ ipvideo_decode_block_opcode_0x6_16, ipvideo_decode_block_opcode_0x7_16,
+ ipvideo_decode_block_opcode_0x8_16, ipvideo_decode_block_opcode_0x9_16,
+ ipvideo_decode_block_opcode_0xA_16, ipvideo_decode_block_opcode_0xB_16,
+ ipvideo_decode_block_opcode_0xC_16, ipvideo_decode_block_opcode_0xD_16,
+ ipvideo_decode_block_opcode_0xE_16, ipvideo_decode_block_opcode_0x1,
+};
static void ipvideo_decode_opcodes(IpvideoContext *s)
{
int x, y;
- int index = 0;
unsigned char opcode;
int ret;
- int code_counts[16];
static int frame = 0;
+ GetBitContext gb;
debug_interplay("------------------ frame %d\n", frame);
frame++;
- for (x = 0; x < 16; x++)
- code_counts[x] = 0;
-
- /* this is PAL8, so make the palette available */
- if (s->avctx->pix_fmt == PIX_FMT_PAL8)
- memcpy(s->current_frame.data[1], s->palette, PALETTE_COUNT * 4);
-
- switch (s->avctx->pix_fmt) {
-
- case PIX_FMT_PAL8:
- sg_stride = s->current_frame.linesize[0];
- sg_stream_ptr = s->buf + 14; /* data starts 14 bytes in */
- sg_stream_end = s->buf + s->size;
- sg_line_inc = sg_stride - 8;
- sg_current_plane = s->current_frame.data[0];
- sg_last_plane = s->last_frame.data[0];
- sg_upper_motion_limit_offset = (s->avctx->height - 8) * sg_stride
- + s->avctx->width - 8;
- sg_dsp = s->dsp;
-
- for (y = 0; y < (sg_stride * s->avctx->height); y += sg_stride * 8) {
- for (x = y; x < y + s->avctx->width; x += 8) {
- /* bottom nibble first, then top nibble (which makes it
- * hard to use a GetBitcontext) */
- if (index & 1)
- opcode = s->decoding_map[index >> 1] >> 4;
- else
- opcode = s->decoding_map[index >> 1] & 0xF;
- index++;
-
- debug_interplay(" block @ (%3d, %3d): encoding 0x%X, data ptr @ %p\n",
- x - y, y / sg_stride, opcode, sg_stream_ptr);
- code_counts[opcode]++;
-
- sg_output_plane = sg_current_plane + x;
- ret = ipvideo_decode_block[opcode]();
- if (ret != 0) {
- printf(" Interplay video: decode problem on frame %d, @ block (%d, %d)\n",
- frame, x - y, y / sg_stride);
- return;
- }
+ if (!s->is_16bpp) {
+ /* this is PAL8, so make the palette available */
+ memcpy(s->current_frame.data[1], s->avctx->palctrl->palette, PALETTE_COUNT * 4);
+
+ s->stride = s->current_frame.linesize[0];
+ s->stream_ptr = s->buf + 14; /* data starts 14 bytes in */
+ s->stream_end = s->buf + s->size;
+ } else {
+ s->stride = s->current_frame.linesize[0] >> 1;
+ s->stream_ptr = s->buf + 16;
+ s->stream_end =
+ s->mv_ptr = s->buf + 14 + AV_RL16(s->buf+14);
+ s->mv_end = s->buf + s->size;
+ }
+ s->line_inc = s->stride - 8;
+ s->upper_motion_limit_offset = (s->avctx->height - 8) * s->current_frame.linesize[0]
+ + (s->avctx->width - 8) * (1 + s->is_16bpp);
+
+ init_get_bits(&gb, s->decoding_map, s->decoding_map_size * 8);
+ for (y = 0; y < s->avctx->height; y += 8) {
+ for (x = 0; x < s->avctx->width; x += 8) {
+ opcode = get_bits(&gb, 4);
+
+ debug_interplay(" block @ (%3d, %3d): encoding 0x%X, data ptr @ %p\n",
+ x, y, opcode, s->stream_ptr);
+
+ if (!s->is_16bpp) {
+ s->pixel_ptr = s->current_frame.data[0] + x
+ + y*s->current_frame.linesize[0];
+ ret = ipvideo_decode_block[opcode](s);
+ } else {
+ s->pixel_ptr = s->current_frame.data[0] + x*2
+ + y*s->current_frame.linesize[0];
+ ret = ipvideo_decode_block16[opcode](s);
+ }
+ if (ret != 0) {
+ av_log(s->avctx, AV_LOG_ERROR, " Interplay video: decode problem on frame %d, @ block (%d, %d)\n",
+ frame, x, y);
+ return;
}
}
- if ((sg_stream_ptr != sg_stream_end) &&
- (sg_stream_ptr + 1 != sg_stream_end)) {
- printf (" Interplay video: decode finished with %d bytes left over\n",
- sg_stream_end - sg_stream_ptr);
- }
- break;
-
- default:
- printf ("Interplay video: Unhandled video format\n");
- break;
}
-
+ if (s->stream_end - s->stream_ptr > 1) {
+ av_log(s->avctx, AV_LOG_ERROR, " Interplay video: decode finished with %td bytes left over\n",
+ s->stream_end - s->stream_ptr);
+ }
}
-static int ipvideo_decode_init(AVCodecContext *avctx)
+static av_cold int ipvideo_decode_init(AVCodecContext *avctx)
{
IpvideoContext *s = avctx->priv_data;
s->avctx = avctx;
- if (s->avctx->extradata_size != sizeof(AVPaletteControl)) {
- printf (" Interplay video: expected extradata_size of %d\n",
- sizeof(AVPaletteControl));
+ s->is_16bpp = avctx->bits_per_coded_sample == 16;
+ avctx->pix_fmt = s->is_16bpp ? PIX_FMT_RGB555 : PIX_FMT_PAL8;
+ if (!s->is_16bpp && s->avctx->palctrl == NULL) {
+ av_log(avctx, AV_LOG_ERROR, " Interplay video: palette expected.\n");
return -1;
}
- avctx->pix_fmt = PIX_FMT_PAL8;
- avctx->has_b_frames = 0;
dsputil_init(&s->dsp, avctx);
- s->first_frame = 1;
-
/* decoding map contains 4 bits of information per 8x8 block */
s->decoding_map_size = avctx->width * avctx->height / (8 * 8 * 2);
- /* assign block decode functions */
- ipvideo_decode_block[0x0] = ipvideo_decode_block_opcode_0x0_0x1;
- ipvideo_decode_block[0x1] = ipvideo_decode_block_opcode_0x0_0x1;
- ipvideo_decode_block[0x2] = ipvideo_decode_block_opcode_0x2;
- ipvideo_decode_block[0x3] = ipvideo_decode_block_opcode_0x3;
- ipvideo_decode_block[0x4] = ipvideo_decode_block_opcode_0x4;
- ipvideo_decode_block[0x5] = ipvideo_decode_block_opcode_0x5;
- ipvideo_decode_block[0x6] = ipvideo_decode_block_opcode_0x6;
- ipvideo_decode_block[0x7] = ipvideo_decode_block_opcode_0x7;
- ipvideo_decode_block[0x8] = ipvideo_decode_block_opcode_0x8;
- ipvideo_decode_block[0x9] = ipvideo_decode_block_opcode_0x9;
- ipvideo_decode_block[0xA] = ipvideo_decode_block_opcode_0xA;
- ipvideo_decode_block[0xB] = ipvideo_decode_block_opcode_0xB;
- ipvideo_decode_block[0xC] = ipvideo_decode_block_opcode_0xC;
- ipvideo_decode_block[0xD] = ipvideo_decode_block_opcode_0xD;
- ipvideo_decode_block[0xE] = ipvideo_decode_block_opcode_0xE;
- ipvideo_decode_block[0xF] = ipvideo_decode_block_opcode_0xF;
+ s->current_frame.data[0] = s->last_frame.data[0] =
+ s->second_last_frame.data[0] = NULL;
return 0;
}
static int ipvideo_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
IpvideoContext *s = avctx->priv_data;
- AVPaletteControl *palette_control = (AVPaletteControl *)avctx->extradata;
+ AVPaletteControl *palette_control = avctx->palctrl;
- if (palette_control->palette_changed) {
- /* load the new palette and reset the palette control */
- ipvideo_new_palette(s, palette_control->palette);
- palette_control->palette_changed = 0;
- }
+ /* compressed buffer needs to be large enough to at least hold an entire
+ * decoding map */
+ if (buf_size < s->decoding_map_size)
+ return buf_size;
s->decoding_map = buf;
s->buf = buf + s->decoding_map_size;
s->size = buf_size - s->decoding_map_size;
+ s->current_frame.reference = 3;
if (avctx->get_buffer(avctx, &s->current_frame)) {
- printf (" Interplay Video: get_buffer() failed\n");
+ av_log(avctx, AV_LOG_ERROR, " Interplay Video: get_buffer() failed\n");
return -1;
}
ipvideo_decode_opcodes(s);
- /* release the last frame if it is allocated */
- if (s->first_frame)
- s->first_frame = 0;
- else
- avctx->release_buffer(avctx, &s->last_frame);
-
- /* shuffle frames */
- s->last_frame = s->current_frame;
+ if (!s->is_16bpp && palette_control->palette_changed) {
+ palette_control->palette_changed = 0;
+ s->current_frame.palette_has_changed = 1;
+ }
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->current_frame;
+ /* shuffle frames */
+ if (s->second_last_frame.data[0])
+ avctx->release_buffer(avctx, &s->second_last_frame);
+ s->second_last_frame = s->last_frame;
+ s->last_frame = s->current_frame;
+ s->current_frame.data[0] = NULL; /* catch any access attempts */
+
/* report that the buffer was completely consumed */
return buf_size;
}
-static int ipvideo_decode_end(AVCodecContext *avctx)
+static av_cold int ipvideo_decode_end(AVCodecContext *avctx)
{
IpvideoContext *s = avctx->priv_data;
/* release the last frame */
- avctx->release_buffer(avctx, &s->last_frame);
+ if (s->last_frame.data[0])
+ avctx->release_buffer(avctx, &s->last_frame);
+ if (s->second_last_frame.data[0])
+ avctx->release_buffer(avctx, &s->second_last_frame);
return 0;
}
AVCodec interplay_video_decoder = {
"interplayvideo",
- CODEC_TYPE_VIDEO,
+ AVMEDIA_TYPE_VIDEO,
CODEC_ID_INTERPLAY_VIDEO,
sizeof(IpvideoContext),
ipvideo_decode_init,
ipvideo_decode_end,
ipvideo_decode_frame,
CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Interplay MVE video"),
};
projects / ffmpeg / blobdiff