mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 2519 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Mike Melanson
21 years ago
parent
ad0d17f1f8
commit
42cad81aea
10 changed files with 711 additions and 4 deletions
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/*
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* FLI/FLC Animation Video Decoder |
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* Copyright (C) 2003 the ffmpeg project |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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*/ |
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/**
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* @file flic.c |
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* Autodesk Animator FLI/FLC Video Decoder |
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* by Mike Melanson (melanson@pcisys.net) |
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* for more information on the .fli/.flc file format and all of its many |
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* variations, visit: |
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* http://www.compuphase.com/flic.htm
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* |
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* This decoder outputs PAL8 colorspace data. To use this decoder, be |
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* sure that your demuxer sends the FLI file header to the decoder via |
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* the extradata chunk in AVCodecContext. The chunk should be 128 bytes |
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* large. The only exception is for FLI files from the game "Magic Carpet", |
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* in which the header is only 12 bytes. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "common.h" |
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#include "avcodec.h" |
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#include "bswap.h" |
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#define FLI_256_COLOR 4 |
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#define FLI_DELTA 7 |
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#define FLI_COLOR 11 |
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#define FLI_LC 12 |
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#define FLI_BLACK 13 |
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#define FLI_BRUN 15 |
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#define FLI_COPY 16 |
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#define FLI_MINI 18 |
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#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0]) |
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#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \ |
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(((uint8_t*)(x))[2] << 16) | \
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(((uint8_t*)(x))[1] << 8) | \
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((uint8_t*)(x))[0]) |
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typedef struct FlicDecodeContext { |
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AVCodecContext *avctx; |
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AVFrame frame; |
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AVFrame prev_frame; |
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unsigned int palette[256]; |
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int new_palette; |
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int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */ |
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} FlicDecodeContext; |
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static int flic_decode_init(AVCodecContext *avctx) |
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{ |
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FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data; |
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unsigned char *fli_header = (unsigned char *)avctx->extradata; |
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s->avctx = avctx; |
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avctx->pix_fmt = PIX_FMT_PAL8; |
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avctx->has_b_frames = 0; |
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if (s->avctx->extradata_size == 12) { |
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/* special case for magic carpet FLIs */ |
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s->fli_type = 0xAF13; |
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} else if (s->avctx->extradata_size == 128) { |
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s->fli_type = LE_16(&fli_header[4]); |
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} else { |
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printf (" FLI video: expected extradata of 12 or 128 bytes\n"); |
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return -1; |
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} |
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s->frame.data[0] = s->prev_frame.data[0] = NULL; |
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s->new_palette = 0; |
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return 0; |
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} |
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static int flic_decode_frame(AVCodecContext *avctx, |
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void *data, int *data_size, |
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uint8_t *buf, int buf_size) |
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{ |
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FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data; |
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int stream_ptr = 0; |
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int stream_ptr_after_color_chunk; |
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int pixel_ptr; |
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int palette_ptr; |
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unsigned char palette_idx1; |
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unsigned char palette_idx2; |
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unsigned int frame_size; |
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int num_chunks; |
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unsigned int chunk_size; |
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int chunk_type; |
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int i, j; |
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int color_packets; |
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int color_changes; |
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int color_shift; |
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unsigned char r, g, b; |
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int lines; |
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int compressed_lines; |
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int starting_line; |
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signed short line_packets; |
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int y_ptr; |
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signed char byte_run; |
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int pixel_skip; |
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int pixel_countdown; |
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int height_countdown; |
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unsigned char *pixels; |
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unsigned char *prev_pixels; |
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s->frame.reference = 1; |
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if (avctx->get_buffer(avctx, &s->frame) < 0) { |
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fprintf(stderr, " FLI: get_buffer() failed\n"); |
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return -1; |
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} |
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pixels = s->frame.data[0]; |
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prev_pixels = s->prev_frame.data[0]; |
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frame_size = LE_32(&buf[stream_ptr]); |
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stream_ptr += 6; /* skip the magic number */ |
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num_chunks = LE_16(&buf[stream_ptr]); |
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stream_ptr += 10; /* skip padding */ |
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frame_size -= 16; |
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/* if there is no data, copy previous frame */ |
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if (frame_size == 0) { |
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memcpy(pixels, prev_pixels, s->frame.linesize[0] * s->avctx->height); |
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} |
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/* iterate through the chunks */ |
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while ((frame_size > 0) && (num_chunks > 0)) { |
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chunk_size = LE_32(&buf[stream_ptr]); |
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stream_ptr += 4; |
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chunk_type = LE_16(&buf[stream_ptr]); |
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stream_ptr += 2; |
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switch (chunk_type) { |
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case FLI_256_COLOR: |
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case FLI_COLOR: |
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stream_ptr_after_color_chunk = stream_ptr + chunk_size - 6; |
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s->new_palette = 1; |
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/* check special case: If this file is from the Magic Carpet
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* game and uses 6-bit colors even though it reports 256-color
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* chunks in a 0xAF12-type file (fli_type is set to 0xAF13 during |
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* initialization) */ |
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if ((chunk_type == FLI_256_COLOR) && (s->fli_type != 0xAF13)) |
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color_shift = 0; |
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else |
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color_shift = 2; |
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/* set up the palette */ |
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color_packets = LE_16(&buf[stream_ptr]); |
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stream_ptr += 2; |
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palette_ptr = 0; |
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for (i = 0; i < color_packets; i++) { |
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/* first byte is how many colors to skip */ |
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palette_ptr += buf[stream_ptr++]; |
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/* next byte indicates how many entries to change */ |
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color_changes = buf[stream_ptr++]; |
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/* if there are 0 color changes, there are actually 256 */ |
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if (color_changes == 0) |
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color_changes = 256; |
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for (j = 0; j < color_changes; j++) { |
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/* wrap around, for good measure */ |
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if (palette_ptr >= 256) |
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palette_ptr = 0; |
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r = buf[stream_ptr++] << color_shift; |
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g = buf[stream_ptr++] << color_shift; |
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b = buf[stream_ptr++] << color_shift; |
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s->palette[palette_ptr++] = (r << 16) | (g << 8) | b; |
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} |
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} |
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/* color chunks sometimes have weird 16-bit alignment issues;
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* therefore, take the hardline approach and set the stream_ptr |
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* to the value calculated w.r.t. the size specified by the color |
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* chunk header */ |
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stream_ptr = stream_ptr_after_color_chunk; |
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break; |
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case FLI_DELTA: |
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y_ptr = 0; |
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height_countdown = s->avctx->height; |
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compressed_lines = LE_16(&buf[stream_ptr]); |
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stream_ptr += 2; |
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while (compressed_lines > 0) { |
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line_packets = LE_16(&buf[stream_ptr]); |
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stream_ptr += 2; |
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if (line_packets < 0) { |
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line_packets = -line_packets; |
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/* height_countdown was already decremented once on
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* this iteration */ |
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height_countdown -= line_packets; |
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/* copy the skipped lines from the previous frame */ |
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while (line_packets--) { |
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memcpy(&pixels[y_ptr], &prev_pixels[y_ptr],
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s->avctx->width); |
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y_ptr += s->frame.linesize[0]; |
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} |
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} else { |
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height_countdown--; |
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compressed_lines--; |
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pixel_ptr = y_ptr; |
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pixel_countdown = s->avctx->width; |
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for (i = 0; i < line_packets; i++) { |
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/* account for the skip bytes */ |
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pixel_skip = buf[stream_ptr++]; |
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memcpy(&pixels[pixel_ptr], &prev_pixels[pixel_ptr], |
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pixel_skip); |
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pixel_ptr += pixel_skip; |
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pixel_countdown -= pixel_skip; |
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byte_run = buf[stream_ptr++]; |
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if (byte_run < 0) { |
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byte_run = -byte_run; |
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palette_idx1 = buf[stream_ptr++]; |
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palette_idx2 = buf[stream_ptr++]; |
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for (j = 0; j < byte_run; j++, pixel_countdown -= 2) { |
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pixels[pixel_ptr++] = palette_idx1; |
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pixels[pixel_ptr++] = palette_idx2; |
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} |
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} else { |
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for (j = 0; j < byte_run * 2; j++, pixel_countdown--) { |
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palette_idx1 = buf[stream_ptr++]; |
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pixels[pixel_ptr++] = palette_idx1; |
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} |
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} |
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} |
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/* copy the remaining pixels in the line from the
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* previous frame */ |
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memcpy(&pixels[pixel_ptr], &prev_pixels[pixel_ptr], |
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pixel_countdown); |
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y_ptr += s->frame.linesize[0]; |
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} |
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} |
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/* copy the remainder of the lines from the previous frame */ |
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while (height_countdown--) { |
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memcpy(&pixels[y_ptr], &prev_pixels[y_ptr], s->avctx->width); |
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y_ptr += s->frame.linesize[0]; |
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} |
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break; |
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case FLI_LC: |
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/* line compressed */ |
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height_countdown = s->avctx->height; |
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starting_line = LE_16(&buf[stream_ptr]); |
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stream_ptr += 2; |
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/* copy from the previous frame all of the lines prior to the
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* starting line */ |
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y_ptr = 0; |
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height_countdown -= starting_line; |
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while (starting_line--) { |
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memcpy(&pixels[y_ptr], &prev_pixels[y_ptr], s->avctx->width); |
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y_ptr += s->frame.linesize[0]; |
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} |
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compressed_lines = LE_16(&buf[stream_ptr]); |
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stream_ptr += 2; |
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while (compressed_lines > 0) { |
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pixel_ptr = y_ptr; |
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pixel_countdown = s->avctx->width; |
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line_packets = buf[stream_ptr++]; |
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if (line_packets > 0) { |
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for (i = 0; i < line_packets; i++) { |
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/* account for the skip bytes */ |
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pixel_skip = buf[stream_ptr++]; |
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memcpy(&pixels[pixel_ptr], |
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&prev_pixels[pixel_ptr], pixel_skip); |
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pixel_ptr += pixel_skip; |
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pixel_countdown -= pixel_skip; |
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byte_run = buf[stream_ptr++]; |
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if (byte_run > 0) { |
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for (j = 0; j < byte_run; j++, pixel_countdown--) { |
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palette_idx1 = buf[stream_ptr++]; |
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pixels[pixel_ptr++] = palette_idx1; |
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} |
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} else { |
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byte_run = -byte_run; |
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palette_idx1 = buf[stream_ptr++]; |
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for (j = 0; j < byte_run; j++, pixel_countdown--) { |
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pixels[pixel_ptr++] = palette_idx1; |
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} |
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} |
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} |
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} |
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/* copy the remainder of the line from the previous frame */ |
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memcpy(&pixels[pixel_ptr], &prev_pixels[pixel_ptr], |
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pixel_countdown); |
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y_ptr += s->frame.linesize[0]; |
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compressed_lines--; |
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height_countdown--; |
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} |
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/* copy the remainder of the lines from the previous frame */ |
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while (height_countdown--) { |
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memcpy(&pixels[y_ptr], &prev_pixels[y_ptr], s->avctx->width); |
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y_ptr += s->frame.linesize[0]; |
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} |
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break; |
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case FLI_BLACK: |
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/* set the whole frame to color 0 (which is usually black) */ |
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memset(pixels, 0, |
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s->frame.linesize[0] * s->avctx->height); |
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break; |
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case FLI_BRUN: |
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/* Byte run compression: This chunk type only occurs in the first
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* FLI frame and it will update the entire frame. */ |
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y_ptr = 0; |
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for (lines = 0; lines < s->avctx->height; lines++) { |
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pixel_ptr = y_ptr; |
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/* disregard the line packets; instead, iterate through all
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* pixels on a row */ |
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stream_ptr++; |
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pixel_countdown = s->avctx->width; |
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while (pixel_countdown > 0) { |
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byte_run = buf[stream_ptr++]; |
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if (byte_run > 0) { |
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palette_idx1 = buf[stream_ptr++]; |
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for (j = 0; j < byte_run; j++) { |
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pixels[pixel_ptr++] = palette_idx1; |
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pixel_countdown--; |
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if (pixel_countdown < 0) |
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printf ("fli warning: pixel_countdown < 0 (%d)\n", |
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pixel_countdown); |
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} |
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} else { /* copy bytes if byte_run < 0 */ |
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byte_run = -byte_run; |
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for (j = 0; j < byte_run; j++) { |
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palette_idx1 = buf[stream_ptr++]; |
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pixels[pixel_ptr++] = palette_idx1; |
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pixel_countdown--; |
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if (pixel_countdown < 0) |
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printf ("fli warning: pixel_countdown < 0 (%d)\n", |
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pixel_countdown); |
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} |
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} |
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} |
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y_ptr += s->frame.linesize[0]; |
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} |
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break; |
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case FLI_COPY: |
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/* copy the chunk (uncompressed frame) to the ghost image and
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* schedule the whole frame to be updated */ |
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if (chunk_size - 6 > s->avctx->width * s->avctx->height) { |
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printf( |
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"FLI: in chunk FLI_COPY : source data (%d bytes) bigger than" \
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" image, skipping chunk\n", |
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chunk_size - 6); |
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stream_ptr += chunk_size - 6; |
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} else { |
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for (y_ptr = 0; y_ptr < s->frame.linesize[0] * s->avctx->height; |
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y_ptr += s->frame.linesize[0]) { |
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memcpy(&pixels[y_ptr], &buf[stream_ptr], |
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s->avctx->width); |
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stream_ptr += s->avctx->width; |
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} |
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} |
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break; |
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case FLI_MINI: |
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/* some sort of a thumbnail? disregard this chunk... */ |
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stream_ptr += chunk_size - 6; |
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break; |
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default: |
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printf ("FLI: Unrecognized chunk type: %d\n", chunk_type); |
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break; |
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} |
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frame_size -= chunk_size; |
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num_chunks--; |
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} |
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/* by the end of the chunk, the stream ptr should equal the frame
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|
* size (minus 1, possibly); if it doesn't, issue a warning */ |
||||||
|
if ((stream_ptr != buf_size) && (stream_ptr != buf_size - 1)) |
||||||
|
printf (" warning: processed FLI chunk where chunk size = %d\n" \
|
||||||
|
" and final chunk ptr = %d\n", |
||||||
|
buf_size, stream_ptr); |
||||||
|
|
||||||
|
/* make the palette available on the way out */ |
||||||
|
// if (s->new_palette) {
|
||||||
|
if (1) { |
||||||
|
memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE); |
||||||
|
s->frame.palette_has_changed = 1; |
||||||
|
s->new_palette = 0; |
||||||
|
} |
||||||
|
|
||||||
|
if (s->prev_frame.data[0]) |
||||||
|
avctx->release_buffer(avctx, &s->prev_frame); |
||||||
|
|
||||||
|
/* shuffle frames */ |
||||||
|
s->prev_frame = s->frame; |
||||||
|
|
||||||
|
*data_size=sizeof(AVFrame); |
||||||
|
*(AVFrame*)data = s->frame; |
||||||
|
|
||||||
|
return buf_size; |
||||||
|
} |
||||||
|
|
||||||
|
static int flic_decode_end(AVCodecContext *avctx) |
||||||
|
{ |
||||||
|
FlicDecodeContext *s = avctx->priv_data; |
||||||
|
|
||||||
|
if (s->prev_frame.data[0]) |
||||||
|
avctx->release_buffer(avctx, &s->prev_frame); |
||||||
|
|
||||||
|
return 0; |
||||||
|
} |
||||||
|
|
||||||
|
AVCodec flic_decoder = { |
||||||
|
"flic", |
||||||
|
CODEC_TYPE_VIDEO, |
||||||
|
CODEC_ID_FLIC, |
||||||
|
sizeof(FlicDecodeContext), |
||||||
|
flic_decode_init, |
||||||
|
NULL, |
||||||
|
flic_decode_end, |
||||||
|
flic_decode_frame, |
||||||
|
CODEC_CAP_DR1, |
||||||
|
NULL |
||||||
|
}; |
||||||
@ -0,0 +1,228 @@ |
|||||||
|
/*
|
||||||
|
* FLI/FLC Animation File Demuxer |
||||||
|
* Copyright (c) 2003 The ffmpeg Project |
||||||
|
* |
||||||
|
* This library is free software; you can redistribute it and/or |
||||||
|
* modify it under the terms of the GNU Lesser General Public |
||||||
|
* License as published by the Free Software Foundation; either |
||||||
|
* version 2 of the License, or (at your option) any later version. |
||||||
|
* |
||||||
|
* This library is distributed in the hope that it will be useful, |
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||||||
|
* Lesser General Public License for more details. |
||||||
|
* |
||||||
|
* You should have received a copy of the GNU Lesser General Public |
||||||
|
* License along with this library; if not, write to the Free Software |
||||||
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
||||||
|
*/ |
||||||
|
|
||||||
|
/**
|
||||||
|
* @file flic.c |
||||||
|
* FLI/FLC file demuxer |
||||||
|
* 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 demuxer handles standard 0xAF11- and 0xAF12-type FLIs. It also |
||||||
|
* handles special FLIs from the PC game "Magic Carpet". |
||||||
|
*/ |
||||||
|
|
||||||
|
#include "avformat.h" |
||||||
|
|
||||||
|
#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0]) |
||||||
|
#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \ |
||||||
|
(((uint8_t*)(x))[2] << 16) | \
|
||||||
|
(((uint8_t*)(x))[1] << 8) | \
|
||||||
|
((uint8_t*)(x))[0]) |
||||||
|
|
||||||
|
#define FLIC_FILE_MAGIC_1 0xAF11 |
||||||
|
#define FLIC_FILE_MAGIC_2 0xAF12 |
||||||
|
#define FLIC_CHUNK_MAGIC_1 0xF1FA |
||||||
|
#define FLIC_CHUNK_MAGIC_2 0xF5FA |
||||||
|
#define FLIC_MC_PTS_INC 6000 /* pts increment for Magic Carpet game FLIs */ |
||||||
|
#define FLIC_DEFAULT_PTS_INC 6000 /* for FLIs that have 0 speed */ |
||||||
|
|
||||||
|
#define FLIC_HEADER_SIZE 128 |
||||||
|
#define FLIC_PREAMBLE_SIZE 6 |
||||||
|
|
||||||
|
typedef struct FlicDemuxContext { |
||||||
|
int frame_pts_inc; |
||||||
|
int64_t pts; |
||||||
|
int video_stream_index; |
||||||
|
} FlicDemuxContext; |
||||||
|
|
||||||
|
static int flic_probe(AVProbeData *p) |
||||||
|
{ |
||||||
|
int magic_number; |
||||||
|
|
||||||
|
if (p->buf_size < 6) |
||||||
|
return 0; |
||||||
|
|
||||||
|
magic_number = LE_16(&p->buf[4]); |
||||||
|
if ((magic_number != FLIC_FILE_MAGIC_1) && |
||||||
|
(magic_number != FLIC_FILE_MAGIC_2)) |
||||||
|
return 0; |
||||||
|
|
||||||
|
return AVPROBE_SCORE_MAX; |
||||||
|
} |
||||||
|
|
||||||
|
static int flic_read_header(AVFormatContext *s, |
||||||
|
AVFormatParameters *ap) |
||||||
|
{ |
||||||
|
FlicDemuxContext *flic = (FlicDemuxContext *)s->priv_data; |
||||||
|
ByteIOContext *pb = &s->pb; |
||||||
|
unsigned char header[FLIC_HEADER_SIZE]; |
||||||
|
AVStream *st; |
||||||
|
int speed; |
||||||
|
int magic_number; |
||||||
|
|
||||||
|
flic->pts = 0; |
||||||
|
|
||||||
|
/* load the whole header and pull out the width and height */ |
||||||
|
if (get_buffer(pb, header, FLIC_HEADER_SIZE) != FLIC_HEADER_SIZE) |
||||||
|
return -EIO; |
||||||
|
|
||||||
|
magic_number = LE_16(&header[4]); |
||||||
|
speed = LE_32(&header[0x10]); |
||||||
|
|
||||||
|
/* initialize the decoder streams */ |
||||||
|
st = av_new_stream(s, 0); |
||||||
|
if (!st) |
||||||
|
return AVERROR_NOMEM; |
||||||
|
flic->video_stream_index = st->index; |
||||||
|
st->codec.codec_type = CODEC_TYPE_VIDEO; |
||||||
|
st->codec.codec_id = CODEC_ID_FLIC; |
||||||
|
st->codec.codec_tag = 0; /* no fourcc */ |
||||||
|
st->codec.width = LE_16(&header[0x08]); |
||||||
|
st->codec.height = LE_16(&header[0x0A]); |
||||||
|
|
||||||
|
if (!st->codec.width || !st->codec.height) |
||||||
|
return AVERROR_INVALIDDATA; |
||||||
|
|
||||||
|
/* send over the whole 128-byte FLIC header */ |
||||||
|
st->codec.extradata_size = FLIC_HEADER_SIZE; |
||||||
|
st->codec.extradata = av_malloc(FLIC_HEADER_SIZE); |
||||||
|
memcpy(st->codec.extradata, header, FLIC_HEADER_SIZE); |
||||||
|
|
||||||
|
/* set the pts reference (1 pts = 1/90000) */ |
||||||
|
s->pts_num = 1; |
||||||
|
s->pts_den = 90000; |
||||||
|
|
||||||
|
/* Time to figure out the framerate: If there is a FLIC chunk magic
|
||||||
|
* number at offset 0x10, assume this is from the Bullfrog game, |
||||||
|
* Magic Carpet. */ |
||||||
|
if (LE_16(&header[0x10]) == FLIC_CHUNK_MAGIC_1) { |
||||||
|
|
||||||
|
flic->frame_pts_inc = FLIC_MC_PTS_INC; |
||||||
|
|
||||||
|
/* rewind the stream since the first chunk is at offset 12 */ |
||||||
|
url_fseek(pb, 12, SEEK_SET); |
||||||
|
|
||||||
|
/* send over abbreviated FLIC header chunk */ |
||||||
|
av_free(st->codec.extradata); |
||||||
|
st->codec.extradata_size = 12; |
||||||
|
st->codec.extradata = av_malloc(12); |
||||||
|
memcpy(st->codec.extradata, header, 12); |
||||||
|
|
||||||
|
} else if (magic_number == FLIC_FILE_MAGIC_1) { |
||||||
|
/*
|
||||||
|
* in this case, the speed (n) is number of 1/70s ticks between frames: |
||||||
|
* |
||||||
|
* pts n * frame # |
||||||
|
* -------- = ----------- => pts = n * (90000/70) * frame # |
||||||
|
* 90000 70 |
||||||
|
* |
||||||
|
* therefore, the frame pts increment = n * 1285.7 |
||||||
|
*/ |
||||||
|
flic->frame_pts_inc = speed * 1285.7; |
||||||
|
} else if (magic_number == FLIC_FILE_MAGIC_2) { |
||||||
|
/*
|
||||||
|
* in this case, the speed (n) is number of milliseconds between frames: |
||||||
|
* |
||||||
|
* pts n * frame # |
||||||
|
* -------- = ----------- => pts = n * 90 * frame # |
||||||
|
* 90000 1000 |
||||||
|
* |
||||||
|
* therefore, the frame pts increment = n * 90 |
||||||
|
*/ |
||||||
|
flic->frame_pts_inc = speed * 90; |
||||||
|
} else |
||||||
|
return AVERROR_INVALIDDATA; |
||||||
|
|
||||||
|
if (flic->frame_pts_inc == 0) |
||||||
|
flic->frame_pts_inc = FLIC_DEFAULT_PTS_INC; |
||||||
|
|
||||||
|
return 0; |
||||||
|
} |
||||||
|
|
||||||
|
static int flic_read_packet(AVFormatContext *s, |
||||||
|
AVPacket *pkt) |
||||||
|
{ |
||||||
|
FlicDemuxContext *flic = (FlicDemuxContext *)s->priv_data; |
||||||
|
ByteIOContext *pb = &s->pb; |
||||||
|
int packet_read = 0; |
||||||
|
unsigned int size; |
||||||
|
int magic; |
||||||
|
int ret = 0; |
||||||
|
unsigned char preamble[FLIC_PREAMBLE_SIZE]; |
||||||
|
|
||||||
|
while (!packet_read) { |
||||||
|
|
||||||
|
if ((ret = get_buffer(pb, preamble, FLIC_PREAMBLE_SIZE)) != |
||||||
|
FLIC_PREAMBLE_SIZE) { |
||||||
|
ret = -EIO; |
||||||
|
break; |
||||||
|
} |
||||||
|
|
||||||
|
size = LE_32(&preamble[0]); |
||||||
|
magic = LE_16(&preamble[4]); |
||||||
|
|
||||||
|
if ((magic == FLIC_CHUNK_MAGIC_1) || (magic == FLIC_CHUNK_MAGIC_2)) { |
||||||
|
if (av_new_packet(pkt, size)) { |
||||||
|
ret = -EIO; |
||||||
|
break; |
||||||
|
} |
||||||
|
pkt->stream_index = flic->video_stream_index; |
||||||
|
pkt->pts = flic->pts; |
||||||
|
memcpy(pkt->data, preamble, FLIC_PREAMBLE_SIZE); |
||||||
|
ret = get_buffer(pb, pkt->data + FLIC_PREAMBLE_SIZE,
|
||||||
|
size - FLIC_PREAMBLE_SIZE); |
||||||
|
if (ret != size - FLIC_PREAMBLE_SIZE) { |
||||||
|
av_free_packet(pkt); |
||||||
|
ret = -EIO; |
||||||
|
} |
||||||
|
flic->pts += flic->frame_pts_inc; |
||||||
|
packet_read = 1; |
||||||
|
} else { |
||||||
|
/* not interested in this chunk */ |
||||||
|
url_fseek(pb, size - 6, SEEK_CUR); |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
return ret; |
||||||
|
} |
||||||
|
|
||||||
|
static int flic_read_close(AVFormatContext *s) |
||||||
|
{ |
||||||
|
// FlicDemuxContext *flic = (FlicDemuxContext *)s->priv_data;
|
||||||
|
|
||||||
|
return 0; |
||||||
|
} |
||||||
|
|
||||||
|
static AVInputFormat flic_iformat = { |
||||||
|
"flic", |
||||||
|
"FLI/FLC animation format", |
||||||
|
sizeof(FlicDemuxContext), |
||||||
|
flic_probe, |
||||||
|
flic_read_header, |
||||||
|
flic_read_packet, |
||||||
|
flic_read_close, |
||||||
|
}; |
||||||
|
|
||||||
|
int flic_init(void) |
||||||
|
{ |
||||||
|
av_register_input_format(&flic_iformat); |
||||||
|
return 0; |
||||||
|
} |
||||||
Loading…
Reference in new issue