| /* | |
| * 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/BGR24. 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 <string.h> | |
| #include "libavutil/intreadwrite.h" | |
| #include "avcodec.h" | |
| #include "bytestream.h" | |
| #include "codec_internal.h" | |
| #include "decode.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) | |
| static inline int check_pixel_ptr(ptrdiff_t ptr, int n, | |
| ptrdiff_t limit, int direction) | |
| { | |
| if (( direction && ptr + n > limit) || | |
| (!direction && ptr + n < limit)) | |
| return AVERROR_INVALIDDATA; | |
| return 0; | |
| } | |
| #define CHECK_PIXEL_PTR(n) \ | |
| { \ | |
| ret = check_pixel_ptr(pixel_ptr, (n), pixel_limit, direction); \ | |
| if (ret < 0) \ | |
| return ret; \ | |
| } | |
| #define CHECK_Y_PTR() \ | |
| { \ | |
| ret = check_pixel_ptr(y_ptr, 0, pixel_limit, direction); \ | |
| if (ret < 0) \ | |
| return ret; \ | |
| } | |
| 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; | |
| uint8_t *fli_header = 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 1 : avctx->pix_fmt = AV_PIX_FMT_MONOBLACK; break; | |
| 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; break; | |
| 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_1BPP(AVCodecContext *avctx, | |
| AVFrame *rframe, int *got_frame, | |
| const uint8_t *buf, int buf_size) | |
| { | |
| FlicDecodeContext *s = avctx->priv_data; | |
| GetByteContext g2; | |
| ptrdiff_t pixel_ptr; | |
| unsigned int frame_size; | |
| int num_chunks; | |
| unsigned int chunk_size; | |
| int chunk_type; | |
| int i, j, ret, direction; | |
| int lines; | |
| int compressed_lines; | |
| int starting_line; | |
| int line_packets; | |
| ptrdiff_t y_ptr; | |
| int byte_run; | |
| int pixel_skip; | |
| int pixel_countdown; | |
| unsigned char *pixels; | |
| ptrdiff_t pixel_limit; | |
| bytestream2_init(&g2, buf, buf_size); | |
| if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0) | |
| return ret; | |
| direction = s->frame->linesize[0] > 0; | |
| pixels = s->frame->data[0]; | |
| pixel_limit = s->avctx->height * s->frame->linesize[0]; | |
| if (buf_size < 16 || buf_size > INT_MAX - 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 */ | |
| if (frame_size < 16) | |
| return AVERROR_INVALIDDATA; | |
| 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_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 + 7) >> 3; | |
| 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) { | |
| int value = bytestream2_get_byte(&g2); | |
| CHECK_PIXEL_PTR(byte_run); | |
| for (j = 0; j < byte_run; j++) { | |
| pixels[pixel_ptr++] = value; | |
| 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_LC: | |
| /* line compressed */ | |
| starting_line = bytestream2_get_le16(&g2); | |
| if (starting_line >= s->avctx->height) | |
| return AVERROR_INVALIDDATA; | |
| 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 + 7) >> 3; | |
| 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) { | |
| int value = bytestream2_get_byte(&g2); | |
| byte_run = -byte_run; | |
| CHECK_PIXEL_PTR(byte_run); | |
| for (j = 0; j < byte_run; j++, pixel_countdown--) { | |
| pixels[pixel_ptr++] = value; | |
| } | |
| } | |
| } | |
| } | |
| y_ptr += s->frame->linesize[0]; | |
| compressed_lines--; | |
| } | |
| 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)); | |
| } else { | |
| av_log(avctx, AV_LOG_ERROR, "Chunk overread\n"); | |
| break; | |
| } | |
| 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)); | |
| if ((ret = av_frame_ref(rframe, s->frame)) < 0) | |
| return ret; | |
| *got_frame = 1; | |
| return buf_size; | |
| } | |
| static int flic_decode_frame_8BPP(AVCodecContext *avctx, | |
| AVFrame *rframe, int *got_frame, | |
| const uint8_t *buf, int buf_size) | |
| { | |
| FlicDecodeContext *s = avctx->priv_data; | |
| GetByteContext g2; | |
| ptrdiff_t 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, direction; | |
| int color_packets; | |
| int color_changes; | |
| int color_shift; | |
| unsigned char r, g, b; | |
| int lines; | |
| int compressed_lines; | |
| int starting_line; | |
| int line_packets; | |
| ptrdiff_t y_ptr; | |
| int byte_run; | |
| int pixel_skip; | |
| int pixel_countdown; | |
| unsigned char *pixels; | |
| ptrdiff_t pixel_limit; | |
| bytestream2_init(&g2, buf, buf_size); | |
| if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0) | |
| return ret; | |
| direction = s->frame->linesize[0] > 0; | |
| 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 */ | |
| if (frame_size < 16) | |
| return AVERROR_INVALIDDATA; | |
| 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; | |
| CHECK_Y_PTR() | |
| line_packets = sign_extend(bytestream2_get_le16(&g2), 16); | |
| if ((line_packets & 0xC000) == 0xC000) { | |
| // line skip opcode | |
| line_packets = -line_packets; | |
| if (line_packets > s->avctx->height) | |
| return AVERROR_INVALIDDATA; | |
| 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); | |
| if (starting_line >= s->avctx->height) | |
| return AVERROR_INVALIDDATA; | |
| 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) */ | |
| for (int y = 0; y < s->avctx->height; y++) | |
| memset(pixels + y * s->frame->linesize[0], 0, s->avctx->width); | |
| 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 != FFALIGN(s->avctx->width, 4) * 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; check_pixel_ptr(y_ptr, s->avctx->width, pixel_limit, direction) == 0; | |
| y_ptr += s->frame->linesize[0]) { | |
| bytestream2_get_buffer(&g2, &pixels[y_ptr], | |
| s->avctx->width); | |
| if (s->avctx->width & 3) | |
| bytestream2_skip(&g2, 4 - (s->avctx->width & 3)); | |
| } | |
| } | |
| 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)); | |
| } else { | |
| av_log(avctx, AV_LOG_ERROR, "Chunk overread\n"); | |
| break; | |
| } | |
| 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) { | |
| #if FF_API_PALETTE_HAS_CHANGED | |
| FF_DISABLE_DEPRECATION_WARNINGS | |
| s->frame->palette_has_changed = 1; | |
| FF_ENABLE_DEPRECATION_WARNINGS | |
| #endif | |
| s->new_palette = 0; | |
| } | |
| if ((ret = av_frame_ref(rframe, s->frame)) < 0) | |
| return ret; | |
| *got_frame = 1; | |
| return buf_size; | |
| } | |
| static int flic_decode_frame_15_16BPP(AVCodecContext *avctx, | |
| AVFrame *rframe, 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; | |
| ptrdiff_t pixel_ptr; | |
| unsigned char palette_idx1; | |
| unsigned int frame_size; | |
| int num_chunks; | |
| unsigned int chunk_size; | |
| int chunk_type; | |
| int i, j, ret, direction; | |
| int lines; | |
| int compressed_lines; | |
| int line_packets; | |
| ptrdiff_t y_ptr; | |
| int byte_run; | |
| int pixel_skip; | |
| int pixel_countdown; | |
| unsigned char *pixels; | |
| int pixel; | |
| ptrdiff_t pixel_limit; | |
| bytestream2_init(&g2, buf, buf_size); | |
| if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0) | |
| return ret; | |
| direction = s->frame->linesize[0] > 0; | |
| 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; | |
| if (frame_size < 16) | |
| return AVERROR_INVALIDDATA; | |
| 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; | |
| CHECK_Y_PTR() | |
| line_packets = sign_extend(bytestream2_get_le16(&g2), 16); | |
| if (line_packets < 0) { | |
| line_packets = -line_packets; | |
| if (line_packets > s->avctx->height) | |
| return AVERROR_INVALIDDATA; | |
| 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. */ | |
| for (int y = 0; y < s->avctx->height; y++) | |
| memset(pixels + y * s->frame->linesize[0], 0, s->avctx->width * 2); | |
| 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)(FFALIGN(s->avctx->width, 2) * 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 { | |
| if (bytestream2_get_bytes_left(&g2) < 2 * s->avctx->width * s->avctx->height ) | |
| return AVERROR_INVALIDDATA; | |
| for (y_ptr = 0; check_pixel_ptr(y_ptr, 2*s->avctx->width, pixel_limit, direction) == 0; | |
| 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--; | |
| } | |
| if (s->avctx->width & 1) | |
| bytestream2_skip(&g2, 2); | |
| } | |
| } | |
| 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; | |
| } | |
| if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) { | |
| bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2)); | |
| } else { | |
| av_log(avctx, AV_LOG_ERROR, "Chunk overread\n"); | |
| 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(rframe, s->frame)) < 0) | |
| return ret; | |
| *got_frame = 1; | |
| return buf_size; | |
| } | |
| static int flic_decode_frame_24BPP(AVCodecContext *avctx, | |
| AVFrame *rframe, int *got_frame, | |
| const uint8_t *buf, int buf_size) | |
| { | |
| FlicDecodeContext *s = avctx->priv_data; | |
| GetByteContext g2; | |
| ptrdiff_t pixel_ptr; | |
| unsigned char palette_idx1; | |
| unsigned int frame_size; | |
| int num_chunks; | |
| unsigned int chunk_size; | |
| int chunk_type; | |
| int i, j, ret, direction; | |
| int lines; | |
| int compressed_lines; | |
| int line_packets; | |
| ptrdiff_t y_ptr; | |
| int byte_run; | |
| int pixel_skip; | |
| int pixel_countdown; | |
| unsigned char *pixels; | |
| int pixel; | |
| ptrdiff_t pixel_limit; | |
| bytestream2_init(&g2, buf, buf_size); | |
| if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0) | |
| return ret; | |
| direction = s->frame->linesize[0] > 0; | |
| 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; | |
| if (frame_size < 16) | |
| return AVERROR_INVALIDDATA; | |
| 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; | |
| CHECK_Y_PTR() | |
| line_packets = sign_extend(bytestream2_get_le16(&g2), 16); | |
| if (line_packets < 0) { | |
| line_packets = -line_packets; | |
| if (line_packets > s->avctx->height) | |
| return AVERROR_INVALIDDATA; | |
| 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*3); /* Pixel is 3 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_le24(&g2); | |
| CHECK_PIXEL_PTR(3 * byte_run); | |
| for (j = 0; j < byte_run; j++, pixel_countdown -= 1) { | |
| AV_WL24(&pixels[pixel_ptr], pixel); | |
| pixel_ptr += 3; | |
| } | |
| } else { | |
| if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk) | |
| break; | |
| CHECK_PIXEL_PTR(3 * byte_run); | |
| for (j = 0; j < byte_run; j++, pixel_countdown--) { | |
| pixel = bytestream2_get_le24(&g2); | |
| AV_WL24(&pixels[pixel_ptr], pixel); | |
| pixel_ptr += 3; | |
| } | |
| } | |
| } | |
| 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 0x00 which is black for 24 bit mode. */ | |
| for (int y = 0; y < s->avctx->height; y++) | |
| memset(pixels + y * s->frame->linesize[0], 0, s->avctx->width * 3); | |
| 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 * 3); | |
| 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); | |
| } | |
| } | |
| } | |
| 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_le24(&g2); | |
| CHECK_PIXEL_PTR(3 * byte_run); | |
| for (j = 0; j < byte_run; j++) { | |
| AV_WL24(pixels + pixel_ptr, pixel); | |
| pixel_ptr += 3; | |
| 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) + 3 * byte_run > stream_ptr_after_chunk) | |
| break; | |
| CHECK_PIXEL_PTR(3 * byte_run); | |
| for (j = 0; j < byte_run; j++) { | |
| pixel = bytestream2_get_le24(&g2); | |
| AV_WL24(pixels + pixel_ptr, pixel); | |
| pixel_ptr += 3; | |
| 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)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*3) { | |
| 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; check_pixel_ptr(y_ptr, 3*s->avctx->width, pixel_limit, direction) == 0; | |
| y_ptr += s->frame->linesize[0]) { | |
| bytestream2_get_buffer(&g2, pixels + y_ptr, 3*s->avctx->width); | |
| if (s->avctx->width & 1) | |
| bytestream2_skip(&g2, 3); | |
| } | |
| } | |
| 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; | |
| } | |
| if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) { | |
| bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2)); | |
| } else { | |
| av_log(avctx, AV_LOG_ERROR, "Chunk overread\n"); | |
| 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(rframe, s->frame)) < 0) | |
| return ret; | |
| *got_frame = 1; | |
| return buf_size; | |
| } | |
| static int flic_decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
| int *got_frame, AVPacket *avpkt) | |
| { | |
| const uint8_t *buf = avpkt->data; | |
| int buf_size = avpkt->size; | |
| if (avctx->pix_fmt == AV_PIX_FMT_MONOBLACK) { | |
| return flic_decode_frame_1BPP(avctx, frame, got_frame, | |
| buf, buf_size); | |
| } else if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { | |
| return flic_decode_frame_8BPP(avctx, frame, 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, frame, got_frame, | |
| buf, buf_size); | |
| } else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) { | |
| return flic_decode_frame_24BPP(avctx, frame, 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 possibilities 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; | |
| } | |
| const FFCodec ff_flic_decoder = { | |
| .p.name = "flic", | |
| CODEC_LONG_NAME("Autodesk Animator Flic video"), | |
| .p.type = AVMEDIA_TYPE_VIDEO, | |
| .p.id = AV_CODEC_ID_FLIC, | |
| .priv_data_size = sizeof(FlicDecodeContext), | |
| .init = flic_decode_init, | |
| .close = flic_decode_end, | |
| FF_CODEC_DECODE_CB(flic_decode_frame), | |
| .p.capabilities = AV_CODEC_CAP_DR1, | |
| }; |