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
@ -0,0 +1,461 @@ |
||||
/*
|
||||
* FLI/FLC Animation Video Decoder |
||||
* 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 |
||||
* 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 colorspace data. 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 <unistd.h> |
||||
|
||||
#include "common.h" |
||||
#include "avcodec.h" |
||||
#include "bswap.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 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]) |
||||
|
||||
typedef struct FlicDecodeContext { |
||||
AVCodecContext *avctx; |
||||
AVFrame frame; |
||||
AVFrame prev_frame; |
||||
|
||||
unsigned int palette[256]; |
||||
int new_palette; |
||||
int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */ |
||||
} FlicDecodeContext; |
||||
|
||||
static int flic_decode_init(AVCodecContext *avctx) |
||||
{ |
||||
FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data; |
||||
unsigned char *fli_header = (unsigned char *)avctx->extradata; |
||||
|
||||
s->avctx = avctx; |
||||
avctx->pix_fmt = PIX_FMT_PAL8; |
||||
avctx->has_b_frames = 0; |
||||
|
||||
if (s->avctx->extradata_size == 12) { |
||||
/* special case for magic carpet FLIs */ |
||||
s->fli_type = 0xAF13; |
||||
} else if (s->avctx->extradata_size == 128) { |
||||
s->fli_type = LE_16(&fli_header[4]); |
||||
} else { |
||||
printf (" FLI video: expected extradata of 12 or 128 bytes\n"); |
||||
return -1; |
||||
} |
||||
|
||||
s->frame.data[0] = s->prev_frame.data[0] = NULL; |
||||
s->new_palette = 0; |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int flic_decode_frame(AVCodecContext *avctx, |
||||
void *data, int *data_size, |
||||
uint8_t *buf, int buf_size) |
||||
{ |
||||
FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data; |
||||
|
||||
int stream_ptr = 0; |
||||
int stream_ptr_after_color_chunk; |
||||
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; |
||||
|
||||
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; |
||||
signed char byte_run; |
||||
int pixel_skip; |
||||
int pixel_countdown; |
||||
int height_countdown; |
||||
unsigned char *pixels; |
||||
unsigned char *prev_pixels; |
||||
|
||||
s->frame.reference = 1; |
||||
if (avctx->get_buffer(avctx, &s->frame) < 0) { |
||||
fprintf(stderr, " FLI: get_buffer() failed\n"); |
||||
return -1; |
||||
} |
||||
|
||||
pixels = s->frame.data[0]; |
||||
prev_pixels = s->prev_frame.data[0]; |
||||
|
||||
frame_size = LE_32(&buf[stream_ptr]); |
||||
stream_ptr += 6; /* skip the magic number */ |
||||
num_chunks = LE_16(&buf[stream_ptr]); |
||||
stream_ptr += 10; /* skip padding */ |
||||
|
||||
frame_size -= 16; |
||||
|
||||
/* if there is no data, copy previous frame */ |
||||
if (frame_size == 0) { |
||||
memcpy(pixels, prev_pixels, s->frame.linesize[0] * s->avctx->height); |
||||
} |
||||
|
||||
/* iterate through the chunks */ |
||||
while ((frame_size > 0) && (num_chunks > 0)) { |
||||
chunk_size = LE_32(&buf[stream_ptr]); |
||||
stream_ptr += 4; |
||||
chunk_type = LE_16(&buf[stream_ptr]); |
||||
stream_ptr += 2; |
||||
|
||||
switch (chunk_type) { |
||||
case FLI_256_COLOR: |
||||
case FLI_COLOR: |
||||
stream_ptr_after_color_chunk = stream_ptr + chunk_size - 6; |
||||
s->new_palette = 1; |
||||
|
||||
/* 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 != 0xAF13)) |
||||
color_shift = 0; |
||||
else |
||||
color_shift = 2; |
||||
/* set up the palette */ |
||||
color_packets = LE_16(&buf[stream_ptr]); |
||||
stream_ptr += 2; |
||||
palette_ptr = 0; |
||||
for (i = 0; i < color_packets; i++) { |
||||
/* first byte is how many colors to skip */ |
||||
palette_ptr += buf[stream_ptr++]; |
||||
|
||||
/* next byte indicates how many entries to change */ |
||||
color_changes = buf[stream_ptr++]; |
||||
|
||||
/* if there are 0 color changes, there are actually 256 */ |
||||
if (color_changes == 0) |
||||
color_changes = 256; |
||||
|
||||
for (j = 0; j < color_changes; j++) { |
||||
|
||||
/* wrap around, for good measure */ |
||||
if (palette_ptr >= 256) |
||||
palette_ptr = 0; |
||||
|
||||
r = buf[stream_ptr++] << color_shift; |
||||
g = buf[stream_ptr++] << color_shift; |
||||
b = buf[stream_ptr++] << color_shift; |
||||
s->palette[palette_ptr++] = (r << 16) | (g << 8) | b; |
||||
} |
||||
} |
||||
|
||||
/* color chunks sometimes have weird 16-bit alignment issues;
|
||||
* therefore, take the hardline approach and set the stream_ptr |
||||
* to the value calculated w.r.t. the size specified by the color |
||||
* chunk header */ |
||||
stream_ptr = stream_ptr_after_color_chunk; |
||||
|
||||
break; |
||||
|
||||
case FLI_DELTA: |
||||
y_ptr = 0; |
||||
height_countdown = s->avctx->height; |
||||
compressed_lines = LE_16(&buf[stream_ptr]); |
||||
stream_ptr += 2; |
||||
while (compressed_lines > 0) { |
||||
line_packets = LE_16(&buf[stream_ptr]); |
||||
stream_ptr += 2; |
||||
if (line_packets < 0) { |
||||
line_packets = -line_packets; |
||||
/* height_countdown was already decremented once on
|
||||
* this iteration */ |
||||
height_countdown -= line_packets; |
||||
/* copy the skipped lines from the previous frame */ |
||||
while (line_packets--) { |
||||
memcpy(&pixels[y_ptr], &prev_pixels[y_ptr],
|
||||
s->avctx->width); |
||||
y_ptr += s->frame.linesize[0]; |
||||
} |
||||
} else { |
||||
height_countdown--; |
||||
compressed_lines--; |
||||
pixel_ptr = y_ptr; |
||||
pixel_countdown = s->avctx->width; |
||||
for (i = 0; i < line_packets; i++) { |
||||
/* account for the skip bytes */ |
||||
pixel_skip = buf[stream_ptr++]; |
||||
memcpy(&pixels[pixel_ptr], &prev_pixels[pixel_ptr], |
||||
pixel_skip); |
||||
pixel_ptr += pixel_skip; |
||||
pixel_countdown -= pixel_skip; |
||||
byte_run = buf[stream_ptr++]; |
||||
if (byte_run < 0) { |
||||
byte_run = -byte_run; |
||||
palette_idx1 = buf[stream_ptr++]; |
||||
palette_idx2 = buf[stream_ptr++]; |
||||
for (j = 0; j < byte_run; j++, pixel_countdown -= 2) { |
||||
pixels[pixel_ptr++] = palette_idx1; |
||||
pixels[pixel_ptr++] = palette_idx2; |
||||
} |
||||
} else { |
||||
for (j = 0; j < byte_run * 2; j++, pixel_countdown--) { |
||||
palette_idx1 = buf[stream_ptr++]; |
||||
pixels[pixel_ptr++] = palette_idx1; |
||||
} |
||||
} |
||||
} |
||||
|
||||
/* copy the remaining pixels in the line from the
|
||||
* previous frame */ |
||||
memcpy(&pixels[pixel_ptr], &prev_pixels[pixel_ptr], |
||||
pixel_countdown); |
||||
|
||||
y_ptr += s->frame.linesize[0]; |
||||
} |
||||
} |
||||
|
||||
/* copy the remainder of the lines from the previous frame */ |
||||
while (height_countdown--) { |
||||
memcpy(&pixels[y_ptr], &prev_pixels[y_ptr], s->avctx->width); |
||||
y_ptr += s->frame.linesize[0]; |
||||
} |
||||
break; |
||||
|
||||
case FLI_LC: |
||||
/* line compressed */ |
||||
height_countdown = s->avctx->height; |
||||
starting_line = LE_16(&buf[stream_ptr]); |
||||
stream_ptr += 2; |
||||
|
||||
/* copy from the previous frame all of the lines prior to the
|
||||
* starting line */ |
||||
y_ptr = 0; |
||||
height_countdown -= starting_line; |
||||
while (starting_line--) { |
||||
memcpy(&pixels[y_ptr], &prev_pixels[y_ptr], s->avctx->width); |
||||
y_ptr += s->frame.linesize[0]; |
||||
} |
||||
|
||||
compressed_lines = LE_16(&buf[stream_ptr]); |
||||
stream_ptr += 2; |
||||
while (compressed_lines > 0) { |
||||
pixel_ptr = y_ptr; |
||||
pixel_countdown = s->avctx->width; |
||||
line_packets = buf[stream_ptr++]; |
||||
if (line_packets > 0) { |
||||
for (i = 0; i < line_packets; i++) { |
||||
/* account for the skip bytes */ |
||||
pixel_skip = buf[stream_ptr++]; |
||||
memcpy(&pixels[pixel_ptr], |
||||
&prev_pixels[pixel_ptr], pixel_skip); |
||||
pixel_ptr += pixel_skip; |
||||
pixel_countdown -= pixel_skip; |
||||
byte_run = buf[stream_ptr++]; |
||||
if (byte_run > 0) { |
||||
for (j = 0; j < byte_run; j++, pixel_countdown--) { |
||||
palette_idx1 = buf[stream_ptr++]; |
||||
pixels[pixel_ptr++] = palette_idx1; |
||||
} |
||||
} else { |
||||
byte_run = -byte_run; |
||||
palette_idx1 = buf[stream_ptr++]; |
||||
for (j = 0; j < byte_run; j++, pixel_countdown--) { |
||||
pixels[pixel_ptr++] = palette_idx1; |
||||
} |
||||
} |
||||
} |
||||
} |
||||
|
||||
/* copy the remainder of the line from the previous frame */ |
||||
memcpy(&pixels[pixel_ptr], &prev_pixels[pixel_ptr], |
||||
pixel_countdown); |
||||
|
||||
y_ptr += s->frame.linesize[0]; |
||||
compressed_lines--; |
||||
height_countdown--; |
||||
} |
||||
|
||||
/* copy the remainder of the lines from the previous frame */ |
||||
while (height_countdown--) { |
||||
memcpy(&pixels[y_ptr], &prev_pixels[y_ptr], s->avctx->width); |
||||
y_ptr += s->frame.linesize[0]; |
||||
} |
||||
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 */ |
||||
stream_ptr++; |
||||
pixel_countdown = s->avctx->width; |
||||
while (pixel_countdown > 0) { |
||||
byte_run = buf[stream_ptr++]; |
||||
if (byte_run > 0) { |
||||
palette_idx1 = buf[stream_ptr++]; |
||||
for (j = 0; j < byte_run; j++) { |
||||
pixels[pixel_ptr++] = palette_idx1; |
||||
pixel_countdown--; |
||||
if (pixel_countdown < 0) |
||||
printf ("fli warning: pixel_countdown < 0 (%d)\n", |
||||
pixel_countdown); |
||||
} |
||||
} else { /* copy bytes if byte_run < 0 */ |
||||
byte_run = -byte_run; |
||||
for (j = 0; j < byte_run; j++) { |
||||
palette_idx1 = buf[stream_ptr++]; |
||||
pixels[pixel_ptr++] = palette_idx1; |
||||
pixel_countdown--; |
||||
if (pixel_countdown < 0) |
||||
printf ("fli warning: pixel_countdown < 0 (%d)\n", |
||||
pixel_countdown); |
||||
} |
||||
} |
||||
} |
||||
|
||||
y_ptr += s->frame.linesize[0]; |
||||
} |
||||
break; |
||||
|
||||
case FLI_COPY: |
||||
/* copy the chunk (uncompressed frame) to the ghost image and
|
||||
* schedule the whole frame to be updated */ |
||||
if (chunk_size - 6 > s->avctx->width * s->avctx->height) { |
||||
printf( |
||||
"FLI: in chunk FLI_COPY : source data (%d bytes) bigger than" \
|
||||
" image, skipping chunk\n", |
||||
chunk_size - 6); |
||||
stream_ptr += chunk_size - 6; |
||||
} else { |
||||
for (y_ptr = 0; y_ptr < s->frame.linesize[0] * s->avctx->height; |
||||
y_ptr += s->frame.linesize[0]) { |
||||
memcpy(&pixels[y_ptr], &buf[stream_ptr], |
||||
s->avctx->width); |
||||
stream_ptr += s->avctx->width; |
||||
} |
||||
} |
||||
break; |
||||
|
||||
case FLI_MINI: |
||||
/* some sort of a thumbnail? disregard this chunk... */ |
||||
stream_ptr += chunk_size - 6; |
||||
break; |
||||
|
||||
default: |
||||
printf ("FLI: 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 ((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