* Interplay MVE Video Decoder
* Copyright (C) 2003 the ffmpeg project
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/interplayvideo.c
+ * @file
* 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 "avcodec.h"
#include "bytestream.h"
#include "dsputil.h"
+#define BITSTREAM_READER_LE
+#include "get_bits.h"
#define PALETTE_COUNT 256
-/* debugging support */
-#define DEBUG_INTERPLAY 0
-#if DEBUG_INTERPLAY
-#define debug_interplay(x,...) av_log(NULL, AV_LOG_DEBUG, x, __VA_ARGS__)
-#else
-static inline void debug_interplay(const char *format, ...) { }
-#endif
-
typedef struct IpvideoContext {
AVCodecContext *avctx;
const unsigned char *decoding_map;
int decoding_map_size;
- const unsigned char *buf;
- int size;
-
- const unsigned char *stream_ptr;
- const unsigned char *stream_end;
+ int is_16bpp;
+ GetByteContext stream_ptr, mv_ptr;
unsigned char *pixel_ptr;
int line_inc;
int stride;
int upper_motion_limit_offset;
+ uint32_t pal[256];
} IpvideoContext;
-#define CHECK_STREAM_PTR(n) \
- if (s->stream_end - s->stream_ptr < n) { \
- av_log(s->avctx, AV_LOG_ERROR, "Interplay video warning: stream_ptr out of bounds (%p >= %p)\n", \
- s->stream_ptr + n, s->stream_end); \
- return -1; \
- }
-
static int copy_from(IpvideoContext *s, AVFrame *src, int delta_x, int delta_y)
{
int current_offset = s->pixel_ptr - s->current_frame.data[0];
- int motion_offset = current_offset + delta_y * s->stride + delta_x;
+ 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;
motion_offset, s->upper_motion_limit_offset);
return -1;
}
- s->dsp.put_pixels_tab[1][0](s->pixel_ptr, src->data[0] + motion_offset, s->stride, 8);
+ if (src->data[0] == NULL) {
+ av_log(s->avctx, AV_LOG_ERROR, "Invalid decode type, corrupted header?\n");
+ return AVERROR(EINVAL);
+ }
+ 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;
}
int x, y;
/* copy block from 2 frames ago using a motion vector; need 1 more byte */
- CHECK_STREAM_PTR(1);
- B = *s->stream_ptr++;
+ if (!s->is_16bpp) {
+ B = bytestream2_get_byte(&s->stream_ptr);
+ } else {
+ B = bytestream2_get_byte(&s->mv_ptr);
+ }
if (B < 56) {
x = 8 + (B % 7);
y = 8 + ((B - 56) / 29);
}
- debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
+ av_dlog(NULL, " motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
return copy_from(s, &s->second_last_frame, x, y);
}
/* copy 8x8 block from current frame from an up/left block */
/* need 1 more byte for motion */
- CHECK_STREAM_PTR(1);
- B = *s->stream_ptr++;
+ if (!s->is_16bpp) {
+ B = bytestream2_get_byte(&s->stream_ptr);
+ } else {
+ B = bytestream2_get_byte(&s->mv_ptr);
+ }
if (B < 56) {
x = -(8 + (B % 7));
y = -( 8 + ((B - 56) / 29));
}
- debug_interplay (" motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
+ av_dlog(NULL, " motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
return copy_from(s, &s->current_frame, x, y);
}
unsigned char B, BL, BH;
/* copy a block from the previous frame; need 1 more byte */
- CHECK_STREAM_PTR(1);
+ if (!s->is_16bpp) {
+ B = bytestream2_get_byte(&s->stream_ptr);
+ } else {
+ B = bytestream2_get_byte(&s->mv_ptr);
+ }
- B = *s->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);
+ av_dlog(NULL, " motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
return copy_from(s, &s->last_frame, x, y);
}
/* copy a block from the previous frame using an expanded range;
* need 2 more bytes */
- CHECK_STREAM_PTR(2);
-
- x = *s->stream_ptr++;
- y = *s->stream_ptr++;
+ x = bytestream2_get_byte(&s->stream_ptr);
+ y = bytestream2_get_byte(&s->stream_ptr);
- debug_interplay (" motion bytes = %d, %d\n", x, y);
+ av_dlog(NULL, " motion bytes = %d, %d\n", x, y);
return copy_from(s, &s->last_frame, x, y);
}
unsigned int flags;
/* 2-color encoding */
- CHECK_STREAM_PTR(2);
-
- P[0] = *s->stream_ptr++;
- P[1] = *s->stream_ptr++;
+ P[0] = bytestream2_get_byte(&s->stream_ptr);
+ P[1] = bytestream2_get_byte(&s->stream_ptr);
if (P[0] <= P[1]) {
/* need 8 more bytes from the stream */
- CHECK_STREAM_PTR(8);
-
for (y = 0; y < 8; y++) {
- flags = *s->stream_ptr++ | 0x100;
- for (; flags != 1; flags >>= 1) {
+ flags = bytestream2_get_byte(&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);
-
- flags = bytestream_get_le16(&s->stream_ptr);
+ flags = bytestream2_get_le16(&s->stream_ptr);
for (y = 0; y < 8; y += 2) {
for (x = 0; x < 8; x += 2, flags >>= 1) {
s->pixel_ptr[x ] =
static int ipvideo_decode_block_opcode_0x8(IpvideoContext *s)
{
int x, y;
- unsigned char P[2];
+ unsigned char P[4];
unsigned int flags = 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);
-
- P[0] = *s->stream_ptr++;
- P[1] = *s->stream_ptr++;
+ P[0] = bytestream2_get_byte(&s->stream_ptr);
+ P[1] = bytestream2_get_byte(&s->stream_ptr);
if (P[0] <= P[1]) {
-
- CHECK_STREAM_PTR(14);
- s->stream_ptr -= 2;
-
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);
+ if (y) {
+ P[0] = bytestream2_get_byte(&s->stream_ptr);
+ P[1] = bytestream2_get_byte(&s->stream_ptr);
+ }
+ flags = bytestream2_get_le16(&s->stream_ptr);
}
- for (x = 0; x < 4; x++, flags >>= 1) {
+ 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 {
+ flags = bytestream2_get_le32(&s->stream_ptr);
+ P[2] = bytestream2_get_byte(&s->stream_ptr);
+ P[3] = bytestream2_get_byte(&s->stream_ptr);
- /* need 10 more bytes */
- CHECK_STREAM_PTR(10);
-
- if (s->stream_ptr[4] <= s->stream_ptr[5]) {
-
- flags = bytestream_get_le32(&s->stream_ptr);
+ if (P[2] <= P[3]) {
/* vertical split; left & right halves are 2-color encoded */
for (y = 0; y < 16; y++) {
- for (x = 0; x < 4; x++, flags >>= 1) {
+ 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);
+ P[0] = P[2];
+ P[1] = P[3];
+ flags = bytestream2_get_le32(&s->stream_ptr);
}
}
for (y = 0; y < 8; y++) {
if (y == 4) {
- P[0] = *s->stream_ptr++;
- P[1] = *s->stream_ptr++;
+ P[0] = P[2];
+ P[1] = P[3];
+ flags = bytestream2_get_le32(&s->stream_ptr);
}
- flags = *s->stream_ptr++ | 0x100;
-
- for (; flags != 1; flags >>= 1) {
+ for (x = 0; x < 8; x++, flags >>= 1)
*s->pixel_ptr++ = P[flags & 1];
- }
s->pixel_ptr += s->line_inc;
}
}
unsigned char P[4];
/* 4-color encoding */
- CHECK_STREAM_PTR(4);
-
- memcpy(P, s->stream_ptr, 4);
- s->stream_ptr += 4;
+ bytestream2_get_buffer(&s->stream_ptr, P, 4);
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);
-
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) {
+ int flags = bytestream2_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;
}
uint32_t flags;
/* 1 of 4 colors for each 2x2 block, need 4 more bytes */
- CHECK_STREAM_PTR(4);
-
- flags = bytestream_get_le32(&s->stream_ptr);
+ flags = bytestream2_get_le32(&s->stream_ptr);
for (y = 0; y < 8; y += 2) {
for (x = 0; x < 8; x += 2, flags >>= 2) {
uint64_t flags;
/* 1 of 4 colors for each 2x1 or 1x2 block, need 8 more bytes */
- CHECK_STREAM_PTR(8);
-
- flags = bytestream_get_le64(&s->stream_ptr);
+ flags = bytestream2_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) {
static int ipvideo_decode_block_opcode_0xA(IpvideoContext *s)
{
int x, y;
- unsigned char P[4];
+ unsigned char P[8];
int flags = 0;
+ bytestream2_get_buffer(&s->stream_ptr, P, 4);
+
/* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
* either top and bottom or left and right halves */
- CHECK_STREAM_PTR(24);
-
- if (s->stream_ptr[0] <= s->stream_ptr[1]) {
+ if (P[0] <= P[1]) {
/* 4-color encoding for each quadrant; need 32 bytes */
- CHECK_STREAM_PTR(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);
+ if (y) bytestream2_get_buffer(&s->stream_ptr, P, 4);
+ flags = bytestream2_get_le32(&s->stream_ptr);
}
- for (x = 0; x < 4; x++, flags >>= 2) {
+ for (x = 0; x < 4; x++, flags >>= 2)
*s->pixel_ptr++ = P[flags & 0x03];
- }
s->pixel_ptr += s->stride - 4;
// switch to right half
} else {
// vertical split?
- int vert = s->stream_ptr[12] <= s->stream_ptr[13];
- uint64_t flags = 0;
+ int vert;
+ uint64_t flags = bytestream2_get_le64(&s->stream_ptr);
+
+ bytestream2_get_buffer(&s->stream_ptr, P + 4, 4);
+ vert = P[4] <= P[5];
/* 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);
- }
-
for (x = 0; x < 4; x++, flags >>= 2)
*s->pixel_ptr++ = P[flags & 0x03];
// switch to right half
if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
} else if (y & 1) s->pixel_ptr += s->line_inc;
+
+ // load values for second half
+ if (y == 7) {
+ memcpy(P, P + 4, 4);
+ flags = bytestream2_get_le64(&s->stream_ptr);
+ }
}
}
int y;
/* 64-color encoding (each pixel in block is a different color) */
- CHECK_STREAM_PTR(64);
-
for (y = 0; y < 8; y++) {
- memcpy(s->pixel_ptr, s->stream_ptr, 8);
- s->stream_ptr += 8;
+ bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8);
s->pixel_ptr += s->stride;
}
int x, y;
/* 16-color block encoding: each 2x2 block is a different color */
- CHECK_STREAM_PTR(16);
-
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[x + 1 + s->stride] = bytestream2_get_byte(&s->stream_ptr);
}
s->pixel_ptr += s->stride * 2;
}
static int ipvideo_decode_block_opcode_0xD(IpvideoContext *s)
{
int y;
- unsigned char P[4];
- unsigned char index = 0;
+ unsigned char P[2];
/* 4-color block encoding: each 4x4 block is a different color */
- CHECK_STREAM_PTR(4);
-
- memcpy(P, s->stream_ptr, 4);
- s->stream_ptr += 4;
-
for (y = 0; y < 8; y++) {
- if (y < 4)
- index = 0;
- else
- index = 2;
-
- memset(s->pixel_ptr , P[index ], 4);
- memset(s->pixel_ptr + 4, P[index + 1], 4);
+ if (!(y & 3)) {
+ P[0] = bytestream2_get_byte(&s->stream_ptr);
+ P[1] = bytestream2_get_byte(&s->stream_ptr);
+ }
+ memset(s->pixel_ptr, P[0], 4);
+ memset(s->pixel_ptr + 4, P[1], 4);
s->pixel_ptr += s->stride;
}
unsigned char pix;
/* 1-color encoding: the whole block is 1 solid color */
- CHECK_STREAM_PTR(1);
- pix = *s->stream_ptr++;
+ pix = bytestream2_get_byte(&s->stream_ptr);
for (y = 0; y < 8; y++) {
memset(s->pixel_ptr, pix, 8);
unsigned char sample[2];
/* dithered encoding */
- CHECK_STREAM_PTR(2);
- sample[0] = *s->stream_ptr++;
- sample[1] = *s->stream_ptr++;
+ sample[0] = bytestream2_get_byte(&s->stream_ptr);
+ sample[1] = bytestream2_get_byte(&s->stream_ptr);
for (y = 0; y < 8; y++) {
for (x = 0; x < 8; x += 2) {
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 */
+ x = bytestream2_get_byte(&s->stream_ptr);
+ y = bytestream2_get_byte(&s->stream_ptr);
+
+ av_dlog(NULL, " 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 */
+ P[0] = bytestream2_get_le16(&s->stream_ptr);
+ P[1] = bytestream2_get_le16(&s->stream_ptr);
+
+ if (!(P[0] & 0x8000)) {
+
+ for (y = 0; y < 8; y++) {
+ flags = bytestream2_get_byte(&s->stream_ptr) | 0x100;
+ for (; flags != 1; flags >>= 1)
+ *pixel_ptr++ = P[flags & 1];
+ pixel_ptr += s->line_inc;
+ }
+
+ } else {
+
+ flags = bytestream2_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;
+ }
+ }
+
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0x8_16(IpvideoContext *s)
+{
+ int x, y;
+ uint16_t P[4];
+ 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 */
+ P[0] = bytestream2_get_le16(&s->stream_ptr);
+ P[1] = bytestream2_get_le16(&s->stream_ptr);
+
+ if (!(P[0] & 0x8000)) {
+
+ for (y = 0; y < 16; y++) {
+ // new values for each 4x4 block
+ if (!(y & 3)) {
+ if (y) {
+ P[0] = bytestream2_get_le16(&s->stream_ptr);
+ P[1] = bytestream2_get_le16(&s->stream_ptr);
+ }
+ flags = bytestream2_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 {
+
+ flags = bytestream2_get_le32(&s->stream_ptr);
+ P[2] = bytestream2_get_le16(&s->stream_ptr);
+ P[3] = bytestream2_get_le16(&s->stream_ptr);
+
+ if (!(P[2] & 0x8000)) {
+
+ /* vertical split; left & right halves are 2-color encoded */
+
+ 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] = P[2];
+ P[1] = P[3];
+ flags = bytestream2_get_le32(&s->stream_ptr);
+ }
+ }
+
+ } else {
+
+ /* horizontal split; top & bottom halves are 2-color encoded */
+
+ for (y = 0; y < 8; y++) {
+ if (y == 4) {
+ P[0] = P[2];
+ P[1] = P[3];
+ flags = bytestream2_get_le32(&s->stream_ptr);
+ }
+
+ for (x = 0; x < 8; x++, flags >>= 1)
+ *pixel_ptr++ = P[flags & 1];
+ pixel_ptr += s->line_inc;
+ }
+ }
+ }
+
+ /* 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 */
+ for (x = 0; x < 4; x++)
+ P[x] = bytestream2_get_le16(&s->stream_ptr);
+
+ if (!(P[0] & 0x8000)) {
+ if (!(P[2] & 0x8000)) {
+
+ /* 1 of 4 colors for each pixel */
+ for (y = 0; y < 8; y++) {
+ /* get the next set of 8 2-bit flags */
+ int flags = bytestream2_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 */
+ flags = bytestream2_get_le32(&s->stream_ptr);
+
+ 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;
+
+ /* 1 of 4 colors for each 2x1 or 1x2 block */
+ flags = bytestream2_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;
+ }
+ }
+ }
+
+ /* report success */
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0xA_16(IpvideoContext *s)
+{
+ int x, y;
+ uint16_t P[8];
+ int flags = 0;
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
+
+ for (x = 0; x < 4; x++)
+ P[x] = bytestream2_get_le16(&s->stream_ptr);
+
+ /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
+ * either top and bottom or left and right halves */
+ if (!(P[0] & 0x8000)) {
+
+ /* 4-color encoding for each quadrant */
+ for (y = 0; y < 16; y++) {
+ // new values for each 4x4 block
+ if (!(y & 3)) {
+ if (y)
+ for (x = 0; x < 4; x++)
+ P[x] = bytestream2_get_le16(&s->stream_ptr);
+ flags = bytestream2_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;
+ uint64_t flags = bytestream2_get_le64(&s->stream_ptr);
+
+ for (x = 4; x < 8; x++)
+ P[x] = bytestream2_get_le16(&s->stream_ptr);
+ vert = !(P[4] & 0x8000);
+
+ /* 4-color encoding for either left and right or top and bottom
+ * halves */
+
+ for (y = 0; y < 16; y++) {
+ 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;
+
+ // load values for second half
+ if (y == 7) {
+ memcpy(P, P + 4, 8);
+ flags = bytestream2_get_le64(&s->stream_ptr);
+ }
+ }
+ }
+
+ /* report success */
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0xB_16(IpvideoContext *s)
+{
+ int x, y;
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
+
+ /* 64-color encoding (each pixel in block is a different color) */
+ for (y = 0; y < 8; y++) {
+ for (x = 0; x < 8; x++)
+ pixel_ptr[x] = bytestream2_get_le16(&s->stream_ptr);
+ pixel_ptr += s->stride;
+ }
+
+ /* report success */
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0xC_16(IpvideoContext *s)
+{
+ int x, y;
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
+
+ /* 16-color block encoding: each 2x2 block is a different color */
+ 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] = bytestream2_get_le16(&s->stream_ptr);
+ }
+ pixel_ptr += s->stride * 2;
+ }
+
+ /* report success */
+ return 0;
+}
+
+static int ipvideo_decode_block_opcode_0xD_16(IpvideoContext *s)
+{
+ int x, y;
+ uint16_t P[2];
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
+
+ /* 4-color block encoding: each 4x4 block is a different color */
+ for (y = 0; y < 8; y++) {
+ if (!(y & 3)) {
+ P[0] = bytestream2_get_le16(&s->stream_ptr);
+ P[1] = bytestream2_get_le16(&s->stream_ptr);
+ }
+ 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_0xE_16(IpvideoContext *s)
+{
+ int x, y;
+ uint16_t pix;
+ uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
+
+ /* 1-color encoding: the whole block is 1 solid color */
+ pix = bytestream2_get_le16(&s->stream_ptr);
+
+ for (y = 0; y < 8; y++) {
+ for (x = 0; x < 8; x++)
+ pixel_ptr[x] = pix;
+ pixel_ptr += s->stride;
+ }
+
+ /* report success */
+ return 0;
+}
+
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_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] = {0};
static int frame = 0;
+ GetBitContext gb;
- debug_interplay("------------------ frame %d\n", frame);
+ av_dlog(NULL, "------------------ frame %d\n", frame);
frame++;
- /* this is PAL8, so make the palette available */
- memcpy(s->current_frame.data[1], s->avctx->palctrl->palette, PALETTE_COUNT * 4);
+ bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */
+ if (!s->is_16bpp) {
+ /* this is PAL8, so make the palette available */
+ memcpy(s->current_frame.data[1], s->pal, AVPALETTE_SIZE);
- 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;
+ s->stride = s->current_frame.linesize[0];
+ } else {
+ s->stride = s->current_frame.linesize[0] >> 1;
+ s->mv_ptr = s->stream_ptr;
+ bytestream2_skip(&s->mv_ptr, bytestream2_get_le16(&s->stream_ptr));
+ }
s->line_inc = s->stride - 8;
- s->upper_motion_limit_offset = (s->avctx->height - 8) * s->stride
- + s->avctx->width - 8;
-
- for (y = 0; y < (s->stride * s->avctx->height); y += s->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 / s->stride, opcode, s->stream_ptr);
- code_counts[opcode]++;
-
- s->pixel_ptr = s->current_frame.data[0] + x;
- ret = ipvideo_decode_block[opcode](s);
+ 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);
+
+ av_dlog(s->avctx,
+ " block @ (%3d, %3d): encoding 0x%X, data ptr offset %d\n",
+ x, y, opcode, bytestream2_tell(&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, y / s->stride);
+ frame, x, y);
return;
}
}
}
- 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);
+ if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Interplay video: decode finished with %d bytes left over\n",
+ bytestream2_get_bytes_left(&s->stream_ptr));
}
}
s->avctx = avctx;
- if (s->avctx->palctrl == NULL) {
- av_log(avctx, AV_LOG_ERROR, " Interplay video: palette expected.\n");
- return -1;
- }
-
- avctx->pix_fmt = PIX_FMT_PAL8;
- dsputil_init(&s->dsp, avctx);
+ s->is_16bpp = avctx->bits_per_coded_sample == 16;
+ avctx->pix_fmt = s->is_16bpp ? PIX_FMT_RGB555 : PIX_FMT_PAL8;
- /* decoding map contains 4 bits of information per 8x8 block */
- s->decoding_map_size = avctx->width * avctx->height / (8 * 8 * 2);
+ ff_dsputil_init(&s->dsp, avctx);
s->current_frame.data[0] = s->last_frame.data[0] =
s->second_last_frame.data[0] = NULL;
static int ipvideo_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- const 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 = avctx->palctrl;
+
+ /* decoding map contains 4 bits of information per 8x8 block */
+ s->decoding_map_size = avctx->width * avctx->height / (8 * 8 * 2);
/* compressed buffer needs to be large enough to at least hold an entire
* decoding map */
return buf_size;
s->decoding_map = buf;
- s->buf = buf + s->decoding_map_size;
- s->size = buf_size - s->decoding_map_size;
+ bytestream2_init(&s->stream_ptr, buf + s->decoding_map_size,
+ buf_size - s->decoding_map_size);
s->current_frame.reference = 3;
if (avctx->get_buffer(avctx, &s->current_frame)) {
return -1;
}
- ipvideo_decode_opcodes(s);
-
- if (palette_control->palette_changed) {
- palette_control->palette_changed = 0;
- s->current_frame.palette_has_changed = 1;
+ if (!s->is_16bpp) {
+ const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
+ if (pal) {
+ s->current_frame.palette_has_changed = 1;
+ memcpy(s->pal, pal, AVPALETTE_SIZE);
+ }
}
+ ipvideo_decode_opcodes(s);
+
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->current_frame;
return 0;
}
-AVCodec interplay_video_decoder = {
- "interplayvideo",
- CODEC_TYPE_VIDEO,
- CODEC_ID_INTERPLAY_VIDEO,
- sizeof(IpvideoContext),
- ipvideo_decode_init,
- NULL,
- ipvideo_decode_end,
- ipvideo_decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Interplay MVE video"),
+AVCodec ff_interplay_video_decoder = {
+ .name = "interplayvideo",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_INTERPLAY_VIDEO,
+ .priv_data_size = sizeof(IpvideoContext),
+ .init = ipvideo_decode_init,
+ .close = ipvideo_decode_end,
+ .decode = ipvideo_decode_frame,
+ .capabilities = CODEC_CAP_DR1 | CODEC_CAP_PARAM_CHANGE,
+ .long_name = NULL_IF_CONFIG_SMALL("Interplay MVE video"),
};
projects / ffmpeg / blobdiff