| /* |
| * FLI/FLC Animation Video Decoder |
| * Copyright (c) 2003, 2004 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 |
| * Autodesk Animator FLI/FLC Video Decoder |
| * by Mike Melanson (melanson@pcisys.net) |
| * for more information on the .fli/.flc file format and all of its many |
| * variations, visit: |
| * http://www.compuphase.com/flic.htm |
| * |
| * This decoder outputs PAL8/RGB555/RGB565 and maybe one day RGB24 |
| * colorspace data, depending on the FLC. To use this decoder, be |
| * sure that your demuxer sends the FLI file header to the decoder via |
| * the extradata chunk in AVCodecContext. The chunk should be 128 bytes |
| * large. The only exception is for FLI files from the game "Magic Carpet", |
| * in which the header is only 12 bytes. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "libavutil/intreadwrite.h" |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "internal.h" |
| #include "mathops.h" |
| |
| #define FLI_256_COLOR 4 |
| #define FLI_DELTA 7 |
| #define FLI_COLOR 11 |
| #define FLI_LC 12 |
| #define FLI_BLACK 13 |
| #define FLI_BRUN 15 |
| #define FLI_COPY 16 |
| #define FLI_MINI 18 |
| #define FLI_DTA_BRUN 25 |
| #define FLI_DTA_COPY 26 |
| #define FLI_DTA_LC 27 |
| |
| #define FLI_TYPE_CODE (0xAF11) |
| #define FLC_FLX_TYPE_CODE (0xAF12) |
| #define FLC_DTA_TYPE_CODE (0xAF44) /* Marks an "Extended FLC" comes from Dave's Targa Animator (DTA) */ |
| #define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE (0xAF13) |
| |
| #define CHECK_PIXEL_PTR(n) \ |
| if (pixel_ptr + n > pixel_limit) { \ |
| av_log (s->avctx, AV_LOG_ERROR, "Invalid pixel_ptr = %d > pixel_limit = %d\n", \ |
| pixel_ptr + n, pixel_limit); \ |
| return AVERROR_INVALIDDATA; \ |
| } \ |
| |
| typedef struct FlicDecodeContext { |
| AVCodecContext *avctx; |
| AVFrame *frame; |
| |
| unsigned int palette[256]; |
| int new_palette; |
| int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */ |
| } FlicDecodeContext; |
| |
| static av_cold int flic_decode_init(AVCodecContext *avctx) |
| { |
| FlicDecodeContext *s = avctx->priv_data; |
| unsigned char *fli_header = (unsigned char *)avctx->extradata; |
| int depth; |
| |
| if (avctx->extradata_size != 0 && |
| avctx->extradata_size != 12 && |
| avctx->extradata_size != 128 && |
| avctx->extradata_size != 256 && |
| avctx->extradata_size != 904 && |
| avctx->extradata_size != 1024) { |
| av_log(avctx, AV_LOG_ERROR, "Unexpected extradata size %d\n", avctx->extradata_size); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| s->avctx = avctx; |
| |
| if (s->avctx->extradata_size == 12) { |
| /* special case for magic carpet FLIs */ |
| s->fli_type = FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE; |
| depth = 8; |
| } else if (avctx->extradata_size == 1024) { |
| uint8_t *ptr = avctx->extradata; |
| int i; |
| |
| for (i = 0; i < 256; i++) { |
| s->palette[i] = AV_RL32(ptr); |
| ptr += 4; |
| } |
| depth = 8; |
| /* FLI in MOV, see e.g. FFmpeg trac issue #626 */ |
| } else if (avctx->extradata_size == 0 || |
| avctx->extradata_size == 256 || |
| /* see FFmpeg ticket #1234 */ |
| avctx->extradata_size == 904) { |
| s->fli_type = FLI_TYPE_CODE; |
| depth = 8; |
| } else { |
| s->fli_type = AV_RL16(&fli_header[4]); |
| depth = AV_RL16(&fli_header[12]); |
| } |
| |
| if (depth == 0) { |
| depth = 8; /* Some FLC generators set depth to zero, when they mean 8Bpp. Fix up here */ |
| } |
| |
| if ((s->fli_type == FLC_FLX_TYPE_CODE) && (depth == 16)) { |
| depth = 15; /* Original Autodesk FLX's say the depth is 16Bpp when it is really 15Bpp */ |
| } |
| |
| switch (depth) { |
| case 8 : avctx->pix_fmt = AV_PIX_FMT_PAL8; break; |
| case 15 : avctx->pix_fmt = AV_PIX_FMT_RGB555; break; |
| case 16 : avctx->pix_fmt = AV_PIX_FMT_RGB565; break; |
| case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; /* Supposedly BGR, but havent any files to test with */ |
| avpriv_request_sample(avctx, "24Bpp FLC/FLX"); |
| return AVERROR_PATCHWELCOME; |
| default : |
| av_log(avctx, AV_LOG_ERROR, "Unknown FLC/FLX depth of %d Bpp is unsupported.\n",depth); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| s->frame = av_frame_alloc(); |
| if (!s->frame) |
| return AVERROR(ENOMEM); |
| |
| s->new_palette = 0; |
| |
| return 0; |
| } |
| |
| static int flic_decode_frame_8BPP(AVCodecContext *avctx, |
| void *data, int *got_frame, |
| const uint8_t *buf, int buf_size) |
| { |
| FlicDecodeContext *s = avctx->priv_data; |
| |
| GetByteContext g2; |
| int pixel_ptr; |
| int palette_ptr; |
| unsigned char palette_idx1; |
| unsigned char palette_idx2; |
| |
| unsigned int frame_size; |
| int num_chunks; |
| |
| unsigned int chunk_size; |
| int chunk_type; |
| |
| int i, j, ret; |
| |
| int color_packets; |
| int color_changes; |
| int color_shift; |
| unsigned char r, g, b; |
| |
| int lines; |
| int compressed_lines; |
| int starting_line; |
| signed short line_packets; |
| int y_ptr; |
| int byte_run; |
| int pixel_skip; |
| int pixel_countdown; |
| unsigned char *pixels; |
| unsigned int pixel_limit; |
| |
| bytestream2_init(&g2, buf, buf_size); |
| |
| if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) |
| return ret; |
| |
| pixels = s->frame->data[0]; |
| pixel_limit = s->avctx->height * s->frame->linesize[0]; |
| if (buf_size < 16 || buf_size > INT_MAX - (3 * 256 + AV_INPUT_BUFFER_PADDING_SIZE)) |
| return AVERROR_INVALIDDATA; |
| frame_size = bytestream2_get_le32(&g2); |
| if (frame_size > buf_size) |
| frame_size = buf_size; |
| bytestream2_skip(&g2, 2); /* skip the magic number */ |
| num_chunks = bytestream2_get_le16(&g2); |
| bytestream2_skip(&g2, 8); /* skip padding */ |
| |
| frame_size -= 16; |
| |
| /* iterate through the chunks */ |
| while ((frame_size >= 6) && (num_chunks > 0) && |
| bytestream2_get_bytes_left(&g2) >= 4) { |
| int stream_ptr_after_chunk; |
| chunk_size = bytestream2_get_le32(&g2); |
| if (chunk_size > frame_size) { |
| av_log(avctx, AV_LOG_WARNING, |
| "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size); |
| chunk_size = frame_size; |
| } |
| stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size; |
| |
| chunk_type = bytestream2_get_le16(&g2); |
| |
| switch (chunk_type) { |
| case FLI_256_COLOR: |
| case FLI_COLOR: |
| /* check special case: If this file is from the Magic Carpet |
| * game and uses 6-bit colors even though it reports 256-color |
| * chunks in a 0xAF12-type file (fli_type is set to 0xAF13 during |
| * initialization) */ |
| if ((chunk_type == FLI_256_COLOR) && (s->fli_type != FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE)) |
| color_shift = 0; |
| else |
| color_shift = 2; |
| /* set up the palette */ |
| color_packets = bytestream2_get_le16(&g2); |
| palette_ptr = 0; |
| for (i = 0; i < color_packets; i++) { |
| /* first byte is how many colors to skip */ |
| palette_ptr += bytestream2_get_byte(&g2); |
| |
| /* next byte indicates how many entries to change */ |
| color_changes = bytestream2_get_byte(&g2); |
| |
| /* if there are 0 color changes, there are actually 256 */ |
| if (color_changes == 0) |
| color_changes = 256; |
| |
| if (bytestream2_tell(&g2) + color_changes * 3 > stream_ptr_after_chunk) |
| break; |
| |
| for (j = 0; j < color_changes; j++) { |
| unsigned int entry; |
| |
| /* wrap around, for good measure */ |
| if ((unsigned)palette_ptr >= 256) |
| palette_ptr = 0; |
| |
| r = bytestream2_get_byte(&g2) << color_shift; |
| g = bytestream2_get_byte(&g2) << color_shift; |
| b = bytestream2_get_byte(&g2) << color_shift; |
| entry = 0xFFU << 24 | r << 16 | g << 8 | b; |
| if (color_shift == 2) |
| entry |= entry >> 6 & 0x30303; |
| if (s->palette[palette_ptr] != entry) |
| s->new_palette = 1; |
| s->palette[palette_ptr++] = entry; |
| } |
| } |
| break; |
| |
| case FLI_DELTA: |
| y_ptr = 0; |
| compressed_lines = bytestream2_get_le16(&g2); |
| while (compressed_lines > 0) { |
| if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) |
| break; |
| line_packets = bytestream2_get_le16(&g2); |
| if ((line_packets & 0xC000) == 0xC000) { |
| // line skip opcode |
| line_packets = -line_packets; |
| y_ptr += line_packets * s->frame->linesize[0]; |
| } else if ((line_packets & 0xC000) == 0x4000) { |
| av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets); |
| } else if ((line_packets & 0xC000) == 0x8000) { |
| // "last byte" opcode |
| pixel_ptr= y_ptr + s->frame->linesize[0] - 1; |
| CHECK_PIXEL_PTR(0); |
| pixels[pixel_ptr] = line_packets & 0xff; |
| } else { |
| compressed_lines--; |
| pixel_ptr = y_ptr; |
| CHECK_PIXEL_PTR(0); |
| pixel_countdown = s->avctx->width; |
| for (i = 0; i < line_packets; i++) { |
| if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) |
| break; |
| /* account for the skip bytes */ |
| pixel_skip = bytestream2_get_byte(&g2); |
| pixel_ptr += pixel_skip; |
| pixel_countdown -= pixel_skip; |
| byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
| if (byte_run < 0) { |
| byte_run = -byte_run; |
| palette_idx1 = bytestream2_get_byte(&g2); |
| palette_idx2 = bytestream2_get_byte(&g2); |
| CHECK_PIXEL_PTR(byte_run * 2); |
| for (j = 0; j < byte_run; j++, pixel_countdown -= 2) { |
| pixels[pixel_ptr++] = palette_idx1; |
| pixels[pixel_ptr++] = palette_idx2; |
| } |
| } else { |
| CHECK_PIXEL_PTR(byte_run * 2); |
| if (bytestream2_tell(&g2) + byte_run * 2 > stream_ptr_after_chunk) |
| break; |
| for (j = 0; j < byte_run * 2; j++, pixel_countdown--) { |
| pixels[pixel_ptr++] = bytestream2_get_byte(&g2); |
| } |
| } |
| } |
| |
| y_ptr += s->frame->linesize[0]; |
| } |
| } |
| break; |
| |
| case FLI_LC: |
| /* line compressed */ |
| starting_line = bytestream2_get_le16(&g2); |
| y_ptr = 0; |
| y_ptr += starting_line * s->frame->linesize[0]; |
| |
| compressed_lines = bytestream2_get_le16(&g2); |
| while (compressed_lines > 0) { |
| pixel_ptr = y_ptr; |
| CHECK_PIXEL_PTR(0); |
| pixel_countdown = s->avctx->width; |
| if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
| break; |
| line_packets = bytestream2_get_byte(&g2); |
| if (line_packets > 0) { |
| for (i = 0; i < line_packets; i++) { |
| /* account for the skip bytes */ |
| if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
| break; |
| pixel_skip = bytestream2_get_byte(&g2); |
| pixel_ptr += pixel_skip; |
| pixel_countdown -= pixel_skip; |
| byte_run = sign_extend(bytestream2_get_byte(&g2),8); |
| if (byte_run > 0) { |
| CHECK_PIXEL_PTR(byte_run); |
| if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk) |
| break; |
| for (j = 0; j < byte_run; j++, pixel_countdown--) { |
| pixels[pixel_ptr++] = bytestream2_get_byte(&g2); |
| } |
| } else if (byte_run < 0) { |
| byte_run = -byte_run; |
| palette_idx1 = bytestream2_get_byte(&g2); |
| CHECK_PIXEL_PTR(byte_run); |
| for (j = 0; j < byte_run; j++, pixel_countdown--) { |
| pixels[pixel_ptr++] = palette_idx1; |
| } |
| } |
| } |
| } |
| |
| y_ptr += s->frame->linesize[0]; |
| compressed_lines--; |
| } |
| break; |
| |
| case FLI_BLACK: |
| /* set the whole frame to color 0 (which is usually black) */ |
| memset(pixels, 0, |
| s->frame->linesize[0] * s->avctx->height); |
| break; |
| |
| case FLI_BRUN: |
| /* Byte run compression: This chunk type only occurs in the first |
| * FLI frame and it will update the entire frame. */ |
| y_ptr = 0; |
| for (lines = 0; lines < s->avctx->height; lines++) { |
| pixel_ptr = y_ptr; |
| /* disregard the line packets; instead, iterate through all |
| * pixels on a row */ |
| bytestream2_skip(&g2, 1); |
| pixel_countdown = s->avctx->width; |
| while (pixel_countdown > 0) { |
| if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
| break; |
| byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
| if (!byte_run) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid byte run value.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (byte_run > 0) { |
| palette_idx1 = bytestream2_get_byte(&g2); |
| CHECK_PIXEL_PTR(byte_run); |
| for (j = 0; j < byte_run; j++) { |
| pixels[pixel_ptr++] = palette_idx1; |
| pixel_countdown--; |
| if (pixel_countdown < 0) |
| av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n", |
| pixel_countdown, lines); |
| } |
| } else { /* copy bytes if byte_run < 0 */ |
| byte_run = -byte_run; |
| CHECK_PIXEL_PTR(byte_run); |
| if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk) |
| break; |
| for (j = 0; j < byte_run; j++) { |
| pixels[pixel_ptr++] = bytestream2_get_byte(&g2); |
| pixel_countdown--; |
| if (pixel_countdown < 0) |
| av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n", |
| pixel_countdown, lines); |
| } |
| } |
| } |
| |
| y_ptr += s->frame->linesize[0]; |
| } |
| break; |
| |
| case FLI_COPY: |
| /* copy the chunk (uncompressed frame) */ |
| if (chunk_size - 6 != s->avctx->width * s->avctx->height) { |
| av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \ |
| "has incorrect size, skipping chunk\n", chunk_size - 6); |
| bytestream2_skip(&g2, chunk_size - 6); |
| } else { |
| for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height; |
| y_ptr += s->frame->linesize[0]) { |
| bytestream2_get_buffer(&g2, &pixels[y_ptr], |
| s->avctx->width); |
| } |
| } |
| break; |
| |
| case FLI_MINI: |
| /* some sort of a thumbnail? disregard this chunk... */ |
| break; |
| |
| default: |
| av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type); |
| break; |
| } |
| |
| if (stream_ptr_after_chunk - bytestream2_tell(&g2) > 0) |
| bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2)); |
| |
| frame_size -= chunk_size; |
| num_chunks--; |
| } |
| |
| /* by the end of the chunk, the stream ptr should equal the frame |
| * size (minus 1 or 2, possibly); if it doesn't, issue a warning */ |
| if (bytestream2_get_bytes_left(&g2) > 2) |
| av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \ |
| "and final chunk ptr = %d\n", buf_size, |
| buf_size - bytestream2_get_bytes_left(&g2)); |
| |
| /* make the palette available on the way out */ |
| memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE); |
| if (s->new_palette) { |
| s->frame->palette_has_changed = 1; |
| s->new_palette = 0; |
| } |
| |
| if ((ret = av_frame_ref(data, s->frame)) < 0) |
| return ret; |
| |
| *got_frame = 1; |
| |
| return buf_size; |
| } |
| |
| static int flic_decode_frame_15_16BPP(AVCodecContext *avctx, |
| void *data, int *got_frame, |
| const uint8_t *buf, int buf_size) |
| { |
| /* Note, the only difference between the 15Bpp and 16Bpp */ |
| /* Format is the pixel format, the packets are processed the same. */ |
| FlicDecodeContext *s = avctx->priv_data; |
| |
| GetByteContext g2; |
| int pixel_ptr; |
| unsigned char palette_idx1; |
| |
| unsigned int frame_size; |
| int num_chunks; |
| |
| unsigned int chunk_size; |
| int chunk_type; |
| |
| int i, j, ret; |
| |
| int lines; |
| int compressed_lines; |
| signed short line_packets; |
| int y_ptr; |
| int byte_run; |
| int pixel_skip; |
| int pixel_countdown; |
| unsigned char *pixels; |
| int pixel; |
| unsigned int pixel_limit; |
| |
| bytestream2_init(&g2, buf, buf_size); |
| |
| if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) |
| return ret; |
| |
| pixels = s->frame->data[0]; |
| pixel_limit = s->avctx->height * s->frame->linesize[0]; |
| |
| frame_size = bytestream2_get_le32(&g2); |
| bytestream2_skip(&g2, 2); /* skip the magic number */ |
| num_chunks = bytestream2_get_le16(&g2); |
| bytestream2_skip(&g2, 8); /* skip padding */ |
| if (frame_size > buf_size) |
| frame_size = buf_size; |
| |
| frame_size -= 16; |
| |
| /* iterate through the chunks */ |
| while ((frame_size > 0) && (num_chunks > 0) && |
| bytestream2_get_bytes_left(&g2) >= 4) { |
| int stream_ptr_after_chunk; |
| chunk_size = bytestream2_get_le32(&g2); |
| if (chunk_size > frame_size) { |
| av_log(avctx, AV_LOG_WARNING, |
| "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size); |
| chunk_size = frame_size; |
| } |
| stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size; |
| |
| chunk_type = bytestream2_get_le16(&g2); |
| |
| |
| switch (chunk_type) { |
| case FLI_256_COLOR: |
| case FLI_COLOR: |
| /* For some reason, it seems that non-palettized flics do |
| * include one of these chunks in their first frame. |
| * Why I do not know, it seems rather extraneous. */ |
| ff_dlog(avctx, |
| "Unexpected Palette chunk %d in non-palettized FLC\n", |
| chunk_type); |
| bytestream2_skip(&g2, chunk_size - 6); |
| break; |
| |
| case FLI_DELTA: |
| case FLI_DTA_LC: |
| y_ptr = 0; |
| compressed_lines = bytestream2_get_le16(&g2); |
| while (compressed_lines > 0) { |
| if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) |
| break; |
| line_packets = bytestream2_get_le16(&g2); |
| if (line_packets < 0) { |
| line_packets = -line_packets; |
| y_ptr += line_packets * s->frame->linesize[0]; |
| } else { |
| compressed_lines--; |
| pixel_ptr = y_ptr; |
| CHECK_PIXEL_PTR(0); |
| pixel_countdown = s->avctx->width; |
| for (i = 0; i < line_packets; i++) { |
| /* account for the skip bytes */ |
| if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) |
| break; |
| pixel_skip = bytestream2_get_byte(&g2); |
| pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */ |
| pixel_countdown -= pixel_skip; |
| byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
| if (byte_run < 0) { |
| byte_run = -byte_run; |
| pixel = bytestream2_get_le16(&g2); |
| CHECK_PIXEL_PTR(2 * byte_run); |
| for (j = 0; j < byte_run; j++, pixel_countdown -= 2) { |
| *((signed short*)(&pixels[pixel_ptr])) = pixel; |
| pixel_ptr += 2; |
| } |
| } else { |
| if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk) |
| break; |
| CHECK_PIXEL_PTR(2 * byte_run); |
| for (j = 0; j < byte_run; j++, pixel_countdown--) { |
| *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2); |
| pixel_ptr += 2; |
| } |
| } |
| } |
| |
| y_ptr += s->frame->linesize[0]; |
| } |
| } |
| break; |
| |
| case FLI_LC: |
| av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n"); |
| bytestream2_skip(&g2, chunk_size - 6); |
| break; |
| |
| case FLI_BLACK: |
| /* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */ |
| memset(pixels, 0x0000, |
| s->frame->linesize[0] * s->avctx->height); |
| break; |
| |
| case FLI_BRUN: |
| y_ptr = 0; |
| for (lines = 0; lines < s->avctx->height; lines++) { |
| pixel_ptr = y_ptr; |
| /* disregard the line packets; instead, iterate through all |
| * pixels on a row */ |
| bytestream2_skip(&g2, 1); |
| pixel_countdown = (s->avctx->width * 2); |
| |
| while (pixel_countdown > 0) { |
| if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
| break; |
| byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
| if (byte_run > 0) { |
| palette_idx1 = bytestream2_get_byte(&g2); |
| CHECK_PIXEL_PTR(byte_run); |
| for (j = 0; j < byte_run; j++) { |
| pixels[pixel_ptr++] = palette_idx1; |
| pixel_countdown--; |
| if (pixel_countdown < 0) |
| av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n", |
| pixel_countdown, lines); |
| } |
| } else { /* copy bytes if byte_run < 0 */ |
| byte_run = -byte_run; |
| if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk) |
| break; |
| CHECK_PIXEL_PTR(byte_run); |
| for (j = 0; j < byte_run; j++) { |
| palette_idx1 = bytestream2_get_byte(&g2); |
| pixels[pixel_ptr++] = palette_idx1; |
| pixel_countdown--; |
| if (pixel_countdown < 0) |
| av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n", |
| pixel_countdown, lines); |
| } |
| } |
| } |
| |
| /* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed. |
| * This does not give us any good opportunity to perform word endian conversion |
| * during decompression. So if it is required (i.e., this is not a LE target, we do |
| * a second pass over the line here, swapping the bytes. |
| */ |
| #if HAVE_BIGENDIAN |
| pixel_ptr = y_ptr; |
| pixel_countdown = s->avctx->width; |
| while (pixel_countdown > 0) { |
| *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]); |
| pixel_ptr += 2; |
| } |
| #endif |
| y_ptr += s->frame->linesize[0]; |
| } |
| break; |
| |
| case FLI_DTA_BRUN: |
| y_ptr = 0; |
| for (lines = 0; lines < s->avctx->height; lines++) { |
| pixel_ptr = y_ptr; |
| /* disregard the line packets; instead, iterate through all |
| * pixels on a row */ |
| bytestream2_skip(&g2, 1); |
| pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */ |
| |
| while (pixel_countdown > 0) { |
| if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
| break; |
| byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
| if (byte_run > 0) { |
| pixel = bytestream2_get_le16(&g2); |
| CHECK_PIXEL_PTR(2 * byte_run); |
| for (j = 0; j < byte_run; j++) { |
| *((signed short*)(&pixels[pixel_ptr])) = pixel; |
| pixel_ptr += 2; |
| pixel_countdown--; |
| if (pixel_countdown < 0) |
| av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n", |
| pixel_countdown); |
| } |
| } else { /* copy pixels if byte_run < 0 */ |
| byte_run = -byte_run; |
| if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk) |
| break; |
| CHECK_PIXEL_PTR(2 * byte_run); |
| for (j = 0; j < byte_run; j++) { |
| *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2); |
| pixel_ptr += 2; |
| pixel_countdown--; |
| if (pixel_countdown < 0) |
| av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n", |
| pixel_countdown); |
| } |
| } |
| } |
| |
| y_ptr += s->frame->linesize[0]; |
| } |
| break; |
| |
| case FLI_COPY: |
| case FLI_DTA_COPY: |
| /* copy the chunk (uncompressed frame) */ |
| if (chunk_size - 6 > (unsigned int)(s->avctx->width * s->avctx->height)*2) { |
| av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \ |
| "bigger than image, skipping chunk\n", chunk_size - 6); |
| bytestream2_skip(&g2, chunk_size - 6); |
| } else { |
| |
| for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height; |
| y_ptr += s->frame->linesize[0]) { |
| |
| pixel_countdown = s->avctx->width; |
| pixel_ptr = 0; |
| while (pixel_countdown > 0) { |
| *((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2); |
| pixel_ptr += 2; |
| pixel_countdown--; |
| } |
| } |
| } |
| break; |
| |
| case FLI_MINI: |
| /* some sort of a thumbnail? disregard this chunk... */ |
| bytestream2_skip(&g2, chunk_size - 6); |
| break; |
| |
| default: |
| av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type); |
| break; |
| } |
| |
| frame_size -= chunk_size; |
| num_chunks--; |
| } |
| |
| /* by the end of the chunk, the stream ptr should equal the frame |
| * size (minus 1, possibly); if it doesn't, issue a warning */ |
| if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1)) |
| av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \ |
| "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2)); |
| |
| if ((ret = av_frame_ref(data, s->frame)) < 0) |
| return ret; |
| |
| *got_frame = 1; |
| |
| return buf_size; |
| } |
| |
| static int flic_decode_frame_24BPP(AVCodecContext *avctx, |
| void *data, int *got_frame, |
| const uint8_t *buf, int buf_size) |
| { |
| av_log(avctx, AV_LOG_ERROR, "24Bpp FLC Unsupported due to lack of test files.\n"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| static int flic_decode_frame(AVCodecContext *avctx, |
| void *data, int *got_frame, |
| AVPacket *avpkt) |
| { |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
| return flic_decode_frame_8BPP(avctx, data, got_frame, |
| buf, buf_size); |
| } |
| else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) || |
| (avctx->pix_fmt == AV_PIX_FMT_RGB565)) { |
| return flic_decode_frame_15_16BPP(avctx, data, got_frame, |
| buf, buf_size); |
| } |
| else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) { |
| return flic_decode_frame_24BPP(avctx, data, got_frame, |
| buf, buf_size); |
| } |
| |
| /* Should not get here, ever as the pix_fmt is processed */ |
| /* in flic_decode_init and the above if should deal with */ |
| /* the finite set of possibilites allowable by here. */ |
| /* But in case we do, just error out. */ |
| av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n"); |
| return AVERROR_BUG; |
| } |
| |
| |
| static av_cold int flic_decode_end(AVCodecContext *avctx) |
| { |
| FlicDecodeContext *s = avctx->priv_data; |
| |
| av_frame_free(&s->frame); |
| |
| return 0; |
| } |
| |
| AVCodec ff_flic_decoder = { |
| .name = "flic", |
| .long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_FLIC, |
| .priv_data_size = sizeof(FlicDecodeContext), |
| .init = flic_decode_init, |
| .close = flic_decode_end, |
| .decode = flic_decode_frame, |
| .capabilities = AV_CODEC_CAP_DR1, |
| }; |
