| /* |
| * Interplay MVE Video 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 |
| * 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 |
| * This code is written in such a way that the identifiers match up |
| * with the encoding descriptions in the document. |
| * |
| * This decoder presently only supports a PAL8 output colorspace. |
| * |
| * An Interplay video frame consists of 2 parts: The decoding map and |
| * the video data. A demuxer must load these 2 parts together in a single |
| * buffer before sending it through the stream to this decoder. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "libavutil/intreadwrite.h" |
| |
| #define BITSTREAM_READER_LE |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "get_bits.h" |
| #include "hpeldsp.h" |
| #include "internal.h" |
| |
| #define PALETTE_COUNT 256 |
| |
| typedef struct IpvideoContext { |
| |
| AVCodecContext *avctx; |
| HpelDSPContext hdsp; |
| AVFrame *second_last_frame; |
| AVFrame *last_frame; |
| |
| /* For format 0x10 */ |
| AVFrame *cur_decode_frame; |
| AVFrame *prev_decode_frame; |
| |
| const unsigned char *decoding_map; |
| int decoding_map_size; |
| const unsigned char *skip_map; |
| int skip_map_size; |
| |
| 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; |
| |
| static int copy_from(IpvideoContext *s, AVFrame *src, AVFrame *dst, int delta_x, int delta_y) |
| { |
| int current_offset = s->pixel_ptr - dst->data[0]; |
| int motion_offset = current_offset + delta_y * dst->linesize[0] |
| + delta_x * (1 + s->is_16bpp); |
| if (motion_offset < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "motion offset < 0 (%d)\n", motion_offset); |
| return AVERROR_INVALIDDATA; |
| } else if (motion_offset > s->upper_motion_limit_offset) { |
| av_log(s->avctx, AV_LOG_ERROR, "motion offset above limit (%d >= %d)\n", |
| motion_offset, s->upper_motion_limit_offset); |
| return AVERROR_INVALIDDATA; |
| } |
| if (!src->data[0]) { |
| av_log(s->avctx, AV_LOG_ERROR, "Invalid decode type, corrupted header?\n"); |
| return AVERROR(EINVAL); |
| } |
| s->hdsp.put_pixels_tab[!s->is_16bpp][0](s->pixel_ptr, src->data[0] + motion_offset, |
| dst->linesize[0], 8); |
| return 0; |
| } |
| |
| static int ipvideo_decode_block_opcode_0x0(IpvideoContext *s, AVFrame *frame) |
| { |
| return copy_from(s, s->last_frame, frame, 0, 0); |
| } |
| |
| static int ipvideo_decode_block_opcode_0x1(IpvideoContext *s, AVFrame *frame) |
| { |
| return copy_from(s, s->second_last_frame, frame, 0, 0); |
| } |
| |
| static int ipvideo_decode_block_opcode_0x2(IpvideoContext *s, AVFrame *frame) |
| { |
| unsigned char B; |
| int x, y; |
| |
| /* copy block from 2 frames ago using a motion vector; need 1 more byte */ |
| 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 = B / 7; |
| } else { |
| x = -14 + ((B - 56) % 29); |
| y = 8 + ((B - 56) / 29); |
| } |
| |
| ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); |
| return copy_from(s, s->second_last_frame, frame, x, y); |
| } |
| |
| static int ipvideo_decode_block_opcode_0x3(IpvideoContext *s, AVFrame *frame) |
| { |
| unsigned char B; |
| int x, y; |
| |
| /* copy 8x8 block from current frame from an up/left block */ |
| |
| /* need 1 more byte for motion */ |
| 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 = -(B / 7); |
| } else { |
| x = -(-14 + ((B - 56) % 29)); |
| y = -( 8 + ((B - 56) / 29)); |
| } |
| |
| ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); |
| return copy_from(s, frame, frame, x, y); |
| } |
| |
| static int ipvideo_decode_block_opcode_0x4(IpvideoContext *s, AVFrame *frame) |
| { |
| int x, y; |
| unsigned char B, BL, BH; |
| |
| /* copy a block from the previous frame; need 1 more byte */ |
| if (!s->is_16bpp) { |
| B = bytestream2_get_byte(&s->stream_ptr); |
| } else { |
| B = bytestream2_get_byte(&s->mv_ptr); |
| } |
| |
| BL = B & 0x0F; |
| BH = (B >> 4) & 0x0F; |
| x = -8 + BL; |
| y = -8 + BH; |
| |
| ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y); |
| return copy_from(s, s->last_frame, frame, x, y); |
| } |
| |
| static int ipvideo_decode_block_opcode_0x5(IpvideoContext *s, AVFrame *frame) |
| { |
| signed char x, y; |
| |
| /* copy a block from the previous frame using an expanded range; |
| * need 2 more bytes */ |
| x = bytestream2_get_byte(&s->stream_ptr); |
| y = bytestream2_get_byte(&s->stream_ptr); |
| |
| ff_tlog(s->avctx, "motion bytes = %d, %d\n", x, y); |
| return copy_from(s, s->last_frame, frame, x, y); |
| } |
| |
| static int ipvideo_decode_block_opcode_0x6(IpvideoContext *s, AVFrame *frame) |
| { |
| /* mystery opcode? skip multiple blocks? */ |
| av_log(s->avctx, AV_LOG_ERROR, "Help! Mystery opcode 0x6 seen\n"); |
| |
| /* report success */ |
| return 0; |
| } |
| |
| static int ipvideo_decode_block_opcode_0x7(IpvideoContext *s, AVFrame *frame) |
| { |
| int x, y; |
| unsigned char P[2]; |
| unsigned int flags; |
| |
| if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) { |
| av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x7\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* 2-color encoding */ |
| 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 */ |
| for (y = 0; y < 8; y++) { |
| 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 */ |
| 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 ] = |
| s->pixel_ptr[x + 1 ] = |
| s->pixel_ptr[x + s->stride] = |
| s->pixel_ptr[x + 1 + s->stride] = P[flags & 1]; |
| } |
| s->pixel_ptr += s->stride * 2; |
| } |
| } |
| |
| /* report success */ |
| return 0; |
| } |
| |
| static int ipvideo_decode_block_opcode_0x8(IpvideoContext *s, AVFrame *frame) |
| { |
| int x, y; |
| unsigned char P[4]; |
| unsigned int flags = 0; |
| |
| if (bytestream2_get_bytes_left(&s->stream_ptr) < 12) { |
| av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x8\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* 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_byte(&s->stream_ptr); |
| P[1] = bytestream2_get_byte(&s->stream_ptr); |
| |
| if (P[0] <= P[1]) { |
| for (y = 0; y < 16; y++) { |
| // new values for each 4x4 block |
| if (!(y & 3)) { |
| 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) |
| *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); |
| |
| 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) |
| *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] = 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) |
| *s->pixel_ptr++ = P[flags & 1]; |
| s->pixel_ptr += s->line_inc; |
| } |
| } |
| } |
| |
| /* report success */ |
| return 0; |
| } |
| |
| static int ipvideo_decode_block_opcode_0x9(IpvideoContext *s, AVFrame *frame) |
| { |
| int x, y; |
| unsigned char P[4]; |
| |
| if (bytestream2_get_bytes_left(&s->stream_ptr) < 8) { |
| av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x9\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* 4-color encoding */ |
| 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 */ |
| 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) |
| *s->pixel_ptr++ = P[flags & 0x03]; |
| s->pixel_ptr += s->line_inc; |
| } |
| |
| } else { |
| uint32_t flags; |
| |
| /* 1 of 4 colors for each 2x2 block, need 4 more bytes */ |
| flags = bytestream2_get_le32(&s->stream_ptr); |
| |
| 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; |
| } |
| |
| } |
| } else { |
| uint64_t flags; |
| |
| /* 1 of 4 colors for each 2x1 or 1x2 block, need 8 more bytes */ |
| 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) { |
| s->pixel_ptr[x ] = |
| s->pixel_ptr[x + 1] = P[flags & 0x03]; |
| } |
| s->pixel_ptr += s->stride; |
| } |
| } 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; |
| } |
| } |
| } |
| |
| /* report success */ |
| return 0; |
| } |
| |
| static int ipvideo_decode_block_opcode_0xA(IpvideoContext *s, AVFrame *frame) |
| { |
| int x, y; |
| unsigned char P[8]; |
| int flags = 0; |
| |
| if (bytestream2_get_bytes_left(&s->stream_ptr) < 16) { |
| av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xA\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| 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 */ |
| if (P[0] <= P[1]) { |
| |
| /* 4-color encoding for each quadrant; need 32 bytes */ |
| for (y = 0; y < 16; y++) { |
| // new values for each 4x4 block |
| if (!(y & 3)) { |
| 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) |
| *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; |
| 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++) { |
| 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; |
| |
| // load values for second half |
| if (y == 7) { |
| memcpy(P, P + 4, 4); |
| flags = bytestream2_get_le64(&s->stream_ptr); |
| } |
| } |
| } |
| |
| /* report success */ |
| return 0; |
| } |
| |
| static int ipvideo_decode_block_opcode_0xB(IpvideoContext *s, AVFrame *frame) |
| { |
| int y; |
| |
| /* 64-color encoding (each pixel in block is a different color) */ |
| for (y = 0; y < 8; y++) { |
| bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8); |
| s->pixel_ptr += s->stride; |
| } |
| |
| /* report success */ |
| return 0; |
| } |
| |
| static int ipvideo_decode_block_opcode_0xC(IpvideoContext *s, AVFrame *frame) |
| { |
| int x, y; |
| |
| /* 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) { |
| s->pixel_ptr[x ] = |
| s->pixel_ptr[x + 1 ] = |
| s->pixel_ptr[x + s->stride] = |
| s->pixel_ptr[x + 1 + s->stride] = bytestream2_get_byte(&s->stream_ptr); |
| } |
| s->pixel_ptr += s->stride * 2; |
| } |
| |
| /* report success */ |
| return 0; |
| } |
| |
| static int ipvideo_decode_block_opcode_0xD(IpvideoContext *s, AVFrame *frame) |
| { |
| int y; |
| unsigned char P[2]; |
| |
| if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) { |
| av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xD\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* 4-color block encoding: each 4x4 block is a different color */ |
| for (y = 0; y < 8; y++) { |
| 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; |
| } |
| |
| /* report success */ |
| return 0; |
| } |
| |
| static int ipvideo_decode_block_opcode_0xE(IpvideoContext *s, AVFrame *frame) |
| { |
| int y; |
| unsigned char pix; |
| |
| /* 1-color encoding: the whole block is 1 solid color */ |
| pix = bytestream2_get_byte(&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, AVFrame *frame) |
| { |
| int x, y; |
| unsigned char sample[2]; |
| |
| /* dithered encoding */ |
| 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) { |
| *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, AVFrame *frame) |
| { |
| 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); |
| |
| ff_tlog(s->avctx, "motion bytes = %d, %d\n", x, y); |
| return copy_from(s, s->second_last_frame, frame, x, y); |
| } |
| |
| static int ipvideo_decode_block_opcode_0x7_16(IpvideoContext *s, AVFrame *frame) |
| { |
| 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, AVFrame *frame) |
| { |
| 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, AVFrame *frame) |
| { |
| 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, AVFrame *frame) |
| { |
| 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, AVFrame *frame) |
| { |
| 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, AVFrame *frame) |
| { |
| 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, AVFrame *frame) |
| { |
| 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, AVFrame *frame) |
| { |
| 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, AVFrame *frame) = { |
| 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, AVFrame *frame) = { |
| 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_format_06_firstpass(IpvideoContext *s, AVFrame *frame, int16_t opcode) |
| { |
| int line; |
| |
| if (!opcode) { |
| for (line = 0; line < 8; ++line) { |
| bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8); |
| s->pixel_ptr += s->stride; |
| } |
| } else { |
| /* Don't try to copy second_last_frame data on the first frames */ |
| if (s->avctx->frame_number > 2) |
| copy_from(s, s->second_last_frame, frame, 0, 0); |
| } |
| } |
| |
| static void ipvideo_format_06_secondpass(IpvideoContext *s, AVFrame *frame, int16_t opcode) |
| { |
| int off_x, off_y; |
| |
| if (opcode < 0) { |
| off_x = ((uint16_t)opcode - 0xC000) % frame->linesize[0]; |
| off_y = ((uint16_t)opcode - 0xC000) / frame->linesize[0]; |
| copy_from(s, s->last_frame, frame, off_x, off_y); |
| } else if (opcode > 0) { |
| off_x = ((uint16_t)opcode - 0x4000) % frame->linesize[0]; |
| off_y = ((uint16_t)opcode - 0x4000) / frame->linesize[0]; |
| copy_from(s, frame, frame, off_x, off_y); |
| } |
| } |
| |
| static void (* const ipvideo_format_06_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op) = { |
| ipvideo_format_06_firstpass, ipvideo_format_06_secondpass, |
| }; |
| |
| static void ipvideo_decode_format_06_opcodes(IpvideoContext *s, AVFrame *frame) |
| { |
| int pass, x, y; |
| int16_t opcode; |
| GetByteContext decoding_map_ptr; |
| |
| /* this is PAL8, so make the palette available */ |
| memcpy(frame->data[1], s->pal, AVPALETTE_SIZE); |
| s->stride = frame->linesize[0]; |
| |
| s->line_inc = s->stride - 8; |
| s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0] |
| + (s->avctx->width - 8) * (1 + s->is_16bpp); |
| |
| bytestream2_init(&decoding_map_ptr, s->decoding_map, s->decoding_map_size); |
| |
| for (pass = 0; pass < 2; ++pass) { |
| bytestream2_seek(&decoding_map_ptr, 0, SEEK_SET); |
| for (y = 0; y < s->avctx->height; y += 8) { |
| for (x = 0; x < s->avctx->width; x += 8) { |
| opcode = bytestream2_get_le16(&decoding_map_ptr); |
| |
| ff_tlog(s->avctx, |
| " block @ (%3d, %3d): opcode 0x%X, data ptr offset %d\n", |
| x, y, opcode, bytestream2_tell(&s->stream_ptr)); |
| |
| s->pixel_ptr = frame->data[0] + x + y * frame->linesize[0]; |
| ipvideo_format_06_passes[pass](s, frame, opcode); |
| } |
| } |
| } |
| |
| if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) { |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "decode finished with %d bytes left over\n", |
| bytestream2_get_bytes_left(&s->stream_ptr)); |
| } |
| } |
| |
| static void ipvideo_format_10_firstpass(IpvideoContext *s, AVFrame *frame, int16_t opcode) |
| { |
| int line; |
| |
| if (!opcode) { |
| for (line = 0; line < 8; ++line) { |
| bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8); |
| s->pixel_ptr += s->stride; |
| } |
| } |
| } |
| |
| static void ipvideo_format_10_secondpass(IpvideoContext *s, AVFrame *frame, int16_t opcode) |
| { |
| int off_x, off_y; |
| |
| if (opcode < 0) { |
| off_x = ((uint16_t)opcode - 0xC000) % s->cur_decode_frame->linesize[0]; |
| off_y = ((uint16_t)opcode - 0xC000) / s->cur_decode_frame->linesize[0]; |
| copy_from(s, s->prev_decode_frame, s->cur_decode_frame, off_x, off_y); |
| } else if (opcode > 0) { |
| off_x = ((uint16_t)opcode - 0x4000) % s->cur_decode_frame->linesize[0]; |
| off_y = ((uint16_t)opcode - 0x4000) / s->cur_decode_frame->linesize[0]; |
| copy_from(s, s->cur_decode_frame, s->cur_decode_frame, off_x, off_y); |
| } |
| } |
| |
| static void (* const ipvideo_format_10_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op) = { |
| ipvideo_format_10_firstpass, ipvideo_format_10_secondpass, |
| }; |
| |
| static void ipvideo_decode_format_10_opcodes(IpvideoContext *s, AVFrame *frame) |
| { |
| int pass, x, y, changed_block; |
| int16_t opcode, skip; |
| GetByteContext decoding_map_ptr; |
| GetByteContext skip_map_ptr; |
| |
| bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */ |
| |
| /* this is PAL8, so make the palette available */ |
| memcpy(frame->data[1], s->pal, AVPALETTE_SIZE); |
| s->stride = frame->linesize[0]; |
| |
| s->line_inc = s->stride - 8; |
| s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0] |
| + (s->avctx->width - 8) * (1 + s->is_16bpp); |
| |
| bytestream2_init(&decoding_map_ptr, s->decoding_map, s->decoding_map_size); |
| bytestream2_init(&skip_map_ptr, s->skip_map, s->skip_map_size); |
| |
| for (pass = 0; pass < 2; ++pass) { |
| bytestream2_seek(&decoding_map_ptr, 0, SEEK_SET); |
| bytestream2_seek(&skip_map_ptr, 0, SEEK_SET); |
| skip = bytestream2_get_le16(&skip_map_ptr); |
| |
| for (y = 0; y < s->avctx->height; y += 8) { |
| for (x = 0; x < s->avctx->width; x += 8) { |
| s->pixel_ptr = s->cur_decode_frame->data[0] + x + y * s->cur_decode_frame->linesize[0]; |
| |
| while (skip <= 0) { |
| if (skip != -0x8000 && skip) { |
| opcode = bytestream2_get_le16(&decoding_map_ptr); |
| ipvideo_format_10_passes[pass](s, frame, opcode); |
| break; |
| } |
| if (bytestream2_get_bytes_left(&skip_map_ptr) < 2) |
| return; |
| skip = bytestream2_get_le16(&skip_map_ptr); |
| } |
| skip *= 2; |
| } |
| } |
| } |
| |
| bytestream2_seek(&skip_map_ptr, 0, SEEK_SET); |
| skip = bytestream2_get_le16(&skip_map_ptr); |
| for (y = 0; y < s->avctx->height; y += 8) { |
| for (x = 0; x < s->avctx->width; x += 8) { |
| changed_block = 0; |
| s->pixel_ptr = frame->data[0] + x + y*frame->linesize[0]; |
| |
| while (skip <= 0) { |
| if (skip != -0x8000 && skip) { |
| changed_block = 1; |
| break; |
| } |
| if (bytestream2_get_bytes_left(&skip_map_ptr) < 2) |
| return; |
| skip = bytestream2_get_le16(&skip_map_ptr); |
| } |
| |
| if (changed_block) { |
| copy_from(s, s->cur_decode_frame, frame, 0, 0); |
| } else { |
| /* Don't try to copy last_frame data on the first frame */ |
| if (s->avctx->frame_number) |
| copy_from(s, s->last_frame, frame, 0, 0); |
| } |
| skip *= 2; |
| } |
| } |
| |
| FFSWAP(AVFrame*, s->prev_decode_frame, s->cur_decode_frame); |
| |
| if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) { |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "decode finished with %d bytes left over\n", |
| bytestream2_get_bytes_left(&s->stream_ptr)); |
| } |
| } |
| |
| static void ipvideo_decode_format_11_opcodes(IpvideoContext *s, AVFrame *frame) |
| { |
| int x, y; |
| unsigned char opcode; |
| int ret; |
| GetBitContext gb; |
| |
| bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */ |
| if (!s->is_16bpp) { |
| /* this is PAL8, so make the palette available */ |
| memcpy(frame->data[1], s->pal, AVPALETTE_SIZE); |
| |
| s->stride = frame->linesize[0]; |
| } else { |
| s->stride = 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) * 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) { |
| if (get_bits_left(&gb) < 4) |
| return; |
| opcode = get_bits(&gb, 4); |
| |
| ff_tlog(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 = frame->data[0] + x |
| + y*frame->linesize[0]; |
| ret = ipvideo_decode_block[opcode](s, frame); |
| } else { |
| s->pixel_ptr = frame->data[0] + x*2 |
| + y*frame->linesize[0]; |
| ret = ipvideo_decode_block16[opcode](s, frame); |
| } |
| if (ret != 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "decode problem on frame %d, @ block (%d, %d)\n", |
| s->avctx->frame_number, x, y); |
| return; |
| } |
| } |
| } |
| if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) { |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "decode finished with %d bytes left over\n", |
| bytestream2_get_bytes_left(&s->stream_ptr)); |
| } |
| } |
| |
| static av_cold int ipvideo_decode_init(AVCodecContext *avctx) |
| { |
| IpvideoContext *s = avctx->priv_data; |
| int ret; |
| |
| s->avctx = avctx; |
| |
| s->is_16bpp = avctx->bits_per_coded_sample == 16; |
| avctx->pix_fmt = s->is_16bpp ? AV_PIX_FMT_RGB555 : AV_PIX_FMT_PAL8; |
| |
| ff_hpeldsp_init(&s->hdsp, avctx->flags); |
| |
| s->last_frame = av_frame_alloc(); |
| s->second_last_frame = av_frame_alloc(); |
| s->cur_decode_frame = av_frame_alloc(); |
| s->prev_decode_frame = av_frame_alloc(); |
| if (!s->last_frame || !s->second_last_frame || |
| !s->cur_decode_frame || !s->prev_decode_frame) { |
| ret = AVERROR(ENOMEM); |
| goto error; |
| } |
| |
| s->cur_decode_frame->width = avctx->width; |
| s->prev_decode_frame->width = avctx->width; |
| s->cur_decode_frame->height = avctx->height; |
| s->prev_decode_frame->height = avctx->height; |
| s->cur_decode_frame->format = avctx->pix_fmt; |
| s->prev_decode_frame->format = avctx->pix_fmt; |
| |
| ret = ff_get_buffer(avctx, s->cur_decode_frame, 0); |
| if (ret < 0) |
| goto error; |
| |
| ret = ff_get_buffer(avctx, s->prev_decode_frame, 0); |
| if (ret < 0) |
| goto error; |
| |
| return 0; |
| error: |
| av_frame_free(&s->last_frame); |
| av_frame_free(&s->second_last_frame); |
| av_frame_free(&s->cur_decode_frame); |
| av_frame_free(&s->prev_decode_frame); |
| return ret; |
| } |
| |
| static int ipvideo_decode_frame(AVCodecContext *avctx, |
| void *data, int *got_frame, |
| AVPacket *avpkt) |
| { |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| IpvideoContext *s = avctx->priv_data; |
| AVFrame *frame = data; |
| int ret; |
| int send_buffer; |
| int frame_format; |
| int video_data_size; |
| |
| if (av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, NULL)) { |
| av_frame_unref(s->last_frame); |
| av_frame_unref(s->second_last_frame); |
| av_frame_unref(s->cur_decode_frame); |
| av_frame_unref(s->prev_decode_frame); |
| } |
| |
| if (!s->cur_decode_frame->data[0]) { |
| ret = ff_get_buffer(avctx, s->cur_decode_frame, 0); |
| if (ret < 0) |
| return ret; |
| |
| ret = ff_get_buffer(avctx, s->prev_decode_frame, 0); |
| if (ret < 0) { |
| av_frame_unref(s->cur_decode_frame); |
| return ret; |
| } |
| } |
| |
| if (buf_size < 8) |
| return AVERROR_INVALIDDATA; |
| |
| frame_format = AV_RL8(buf); |
| send_buffer = AV_RL8(buf + 1); |
| video_data_size = AV_RL16(buf + 2); |
| s->decoding_map_size = AV_RL16(buf + 4); |
| s->skip_map_size = AV_RL16(buf + 6); |
| |
| switch(frame_format) { |
| case 0x06: |
| if (s->decoding_map_size) { |
| av_log(avctx, AV_LOG_ERROR, "Decoding map for format 0x06\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (s->skip_map_size) { |
| av_log(avctx, AV_LOG_ERROR, "Skip map for format 0x06\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (s->is_16bpp) { |
| av_log(avctx, AV_LOG_ERROR, "Video format 0x06 does not support 16bpp movies\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* Decoding map for 0x06 frame format is at the top of pixeldata */ |
| s->decoding_map_size = ((s->avctx->width / 8) * (s->avctx->height / 8)) * 2; |
| s->decoding_map = buf + 8 + 14; /* 14 bits of op data */ |
| video_data_size -= s->decoding_map_size + 14; |
| if (video_data_size <= 0) |
| return AVERROR_INVALIDDATA; |
| |
| if (buf_size < 8 + s->decoding_map_size + 14 + video_data_size) |
| return AVERROR_INVALIDDATA; |
| |
| bytestream2_init(&s->stream_ptr, buf + 8 + s->decoding_map_size + 14, video_data_size); |
| |
| break; |
| |
| case 0x10: |
| if (! s->decoding_map_size) { |
| av_log(avctx, AV_LOG_ERROR, "Empty decoding map for format 0x10\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (! s->skip_map_size) { |
| av_log(avctx, AV_LOG_ERROR, "Empty skip map for format 0x10\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (s->is_16bpp) { |
| av_log(avctx, AV_LOG_ERROR, "Video format 0x10 does not support 16bpp movies\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (buf_size < 8 + video_data_size + s->decoding_map_size + s->skip_map_size) |
| return AVERROR_INVALIDDATA; |
| |
| bytestream2_init(&s->stream_ptr, buf + 8, video_data_size); |
| s->decoding_map = buf + 8 + video_data_size; |
| s->skip_map = buf + 8 + video_data_size + s->decoding_map_size; |
| |
| break; |
| |
| case 0x11: |
| if (! s->decoding_map_size) { |
| av_log(avctx, AV_LOG_ERROR, "Empty decoding map for format 0x11\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (s->skip_map_size) { |
| av_log(avctx, AV_LOG_ERROR, "Skip map for format 0x11\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (buf_size < 8 + video_data_size + s->decoding_map_size) |
| return AVERROR_INVALIDDATA; |
| |
| bytestream2_init(&s->stream_ptr, buf + 8, video_data_size); |
| s->decoding_map = buf + 8 + video_data_size; |
| |
| break; |
| |
| default: |
| av_log(avctx, AV_LOG_ERROR, "Frame type 0x%02X unsupported\n", frame_format); |
| } |
| |
| /* ensure we can't overread the packet */ |
| if (buf_size < 8 + s->decoding_map_size + video_data_size + s->skip_map_size) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid IP packet size\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) |
| return ret; |
| |
| if (!s->is_16bpp) { |
| int size; |
| const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size); |
| if (pal && size == AVPALETTE_SIZE) { |
| frame->palette_has_changed = 1; |
| memcpy(s->pal, pal, AVPALETTE_SIZE); |
| } else if (pal) { |
| av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size); |
| } |
| } |
| |
| switch(frame_format) { |
| case 0x06: |
| ipvideo_decode_format_06_opcodes(s, frame); |
| break; |
| case 0x10: |
| ipvideo_decode_format_10_opcodes(s, frame); |
| break; |
| case 0x11: |
| ipvideo_decode_format_11_opcodes(s, frame); |
| break; |
| } |
| |
| *got_frame = send_buffer; |
| |
| /* shuffle frames */ |
| av_frame_unref(s->second_last_frame); |
| FFSWAP(AVFrame*, s->second_last_frame, s->last_frame); |
| if ((ret = av_frame_ref(s->last_frame, frame)) < 0) |
| return ret; |
| |
| /* report that the buffer was completely consumed */ |
| return buf_size; |
| } |
| |
| static av_cold int ipvideo_decode_end(AVCodecContext *avctx) |
| { |
| IpvideoContext *s = avctx->priv_data; |
| |
| av_frame_free(&s->last_frame); |
| av_frame_free(&s->second_last_frame); |
| av_frame_free(&s->cur_decode_frame); |
| av_frame_free(&s->prev_decode_frame); |
| |
| return 0; |
| } |
| |
| AVCodec ff_interplay_video_decoder = { |
| .name = "interplayvideo", |
| .long_name = NULL_IF_CONFIG_SMALL("Interplay MVE video"), |
| .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 = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_PARAM_CHANGE, |
| }; |
