1 /*
2 * Bethesda VID video decoder
3 * Copyright (C) 2007 Nicholas Tung
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * @brief Bethesda Softworks VID Video Decoder
25 * @author Nicholas Tung [ntung (at. ntung com] (2007-03)
26 * @see http://wiki.multimedia.cx/index.php?title=Bethsoft_VID
27 * @see http://www.svatopluk.com/andux/docs/dfvid.html
28 */
29
35
40
42 {
45
49
50 return 0;
51 }
52
54 {
55 uint32_t *palette = (uint32_t *)ctx->
frame->
data[1];
57
60
61 for(
a = 0;
a < 256;
a++){
62 palette[
a] = 0xFF
U << 24 | bytestream2_get_be24u(&ctx->
g) * 4;
63 palette[
a] |= palette[
a] >> 6 & 0x30303;
64 }
66 return 0;
67 }
68
70 void *
data,
int *got_frame,
72 {
74 char block_type;
77 int remaining = avctx->
width;
// number of bytes remaining on a line
78 int wrap_to_next_line;
79 int code, ret;
80 int yoffset;
81
83 return ret;
85
91 return ret;
92 }
93
97
98 switch(block_type = bytestream2_get_byte(&vid->
g)){
100 *got_frame = 0;
103 return ret;
104 }
106 }
108 yoffset = bytestream2_get_le16(&vid->
g);
109 if(yoffset >= avctx->
height)
112 }
113
114 // main code
115 while((code = bytestream2_get_byte(&vid->
g))){
117
118 // copy any bytes starting at the current position, and ending at the frame width
119 while(length > remaining){
120 if(code < 0x80)
123 memset(dst, bytestream2_peek_byte(&vid->
g), remaining);
124 length -= remaining; // decrement the number of bytes to be copied
125 dst += remaining + wrap_to_next_line; // skip over extra bytes at end of frame
126 remaining = avctx->
width;
127 if(dst == frame_end)
129 }
130
131 // copy any remaining bytes after / if line overflows
132 if(code < 0x80)
135 memset(dst, bytestream2_get_byte(&vid->
g), length);
138 }
140
142 return ret;
143
144 *got_frame = 1;
145
147 }
148
150 {
153 return 0;
154 }
155
157 .
name =
"bethsoftvid",
167 };
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static av_cold int init(AVCodecContext *avctx)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buf...
AVCodec ff_bethsoftvid_decoder
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
8 bits with AV_PIX_FMT_RGB32 palette
static av_cold int end(AVCodecContext *avctx)
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
enum AVPacketSideDataType type
const char * name
Name of the codec implementation.
static int bethsoftvid_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static void frame_end(MpegEncContext *s)
int width
picture width / height.
static int set_palette(BethsoftvidContext *ctx)
static av_always_inline int bytestream2_tell(GetByteContext *g)
Libavcodec external API header.
static av_cold int bethsoftvid_decode_end(AVCodecContext *avctx)
static av_cold int bethsoftvid_decode_init(AVCodecContext *avctx)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
int palette_has_changed
Tell user application that palette has changed from previous frame.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
common internal api header.
common internal and external API header
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.