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aasc.c
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1 /*
2  * Autodesk RLE Decoder
3  * Copyright (c) 2005 The FFmpeg Project
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  * Autodesk RLE Video Decoder by Konstantin Shishkov
25  */
26 
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 
31 #include "avcodec.h"
32 #include "internal.h"
33 #include "msrledec.h"
34 
35 typedef struct AascContext {
39 
42 } AascContext;
43 
45 {
46  AascContext *s = avctx->priv_data;
47  uint8_t *ptr;
48  int i;
49 
50  s->avctx = avctx;
51  switch (avctx->bits_per_coded_sample) {
52  case 8:
53  avctx->pix_fmt = AV_PIX_FMT_PAL8;
54 
55  ptr = avctx->extradata;
57  for (i = 0; i < s->palette_size / 4; i++) {
58  s->palette[i] = 0xFFU << 24 | AV_RL32(ptr);
59  ptr += 4;
60  }
61  break;
62  case 16:
64  break;
65  case 24:
66  avctx->pix_fmt = AV_PIX_FMT_BGR24;
67  break;
68  default:
69  av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", avctx->bits_per_coded_sample);
70  return -1;
71  }
72 
73  s->frame = av_frame_alloc();
74  if (!s->frame)
75  return AVERROR(ENOMEM);
76 
77  return 0;
78 }
79 
81  void *data, int *got_frame,
82  AVPacket *avpkt)
83 {
84  const uint8_t *buf = avpkt->data;
85  int buf_size = avpkt->size;
86  AascContext *s = avctx->priv_data;
87  int compr, i, stride, psize, ret;
88 
89  if (buf_size < 4) {
90  av_log(avctx, AV_LOG_ERROR, "frame too short\n");
91  return AVERROR_INVALIDDATA;
92  }
93 
94  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
95  return ret;
96 
97  compr = AV_RL32(buf);
98  buf += 4;
99  buf_size -= 4;
100  psize = avctx->bits_per_coded_sample / 8;
101  switch (avctx->codec_tag) {
102  case MKTAG('A', 'A', 'S', '4'):
103  bytestream2_init(&s->gb, buf - 4, buf_size + 4);
104  ff_msrle_decode(avctx, (AVPicture*)s->frame, 8, &s->gb);
105  break;
106  case MKTAG('A', 'A', 'S', 'C'):
107  switch (compr) {
108  case 0:
109  stride = (avctx->width * psize + psize) & ~psize;
110  if (buf_size < stride * avctx->height)
111  return AVERROR_INVALIDDATA;
112  for (i = avctx->height - 1; i >= 0; i--) {
113  memcpy(s->frame->data[0] + i * s->frame->linesize[0], buf, avctx->width * psize);
114  buf += stride;
115  buf_size -= stride;
116  }
117  break;
118  case 1:
119  bytestream2_init(&s->gb, buf, buf_size);
120  ff_msrle_decode(avctx, (AVPicture*)s->frame, 8, &s->gb);
121  break;
122  default:
123  av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
124  return AVERROR_INVALIDDATA;
125  }
126  break;
127  default:
128  av_log(avctx, AV_LOG_ERROR, "Unknown FourCC: %X\n", avctx->codec_tag);
129  return -1;
130  }
131 
132  if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
133  memcpy(s->frame->data[1], s->palette, s->palette_size);
134 
135  *got_frame = 1;
136  if ((ret = av_frame_ref(data, s->frame)) < 0)
137  return ret;
138 
139  /* report that the buffer was completely consumed */
140  return avpkt->size;
141 }
142 
144 {
145  AascContext *s = avctx->priv_data;
146 
147  av_frame_free(&s->frame);
148 
149  return 0;
150 }
151 
153  .name = "aasc",
154  .long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"),
155  .type = AVMEDIA_TYPE_VIDEO,
156  .id = AV_CODEC_ID_AASC,
157  .priv_data_size = sizeof(AascContext),
159  .close = aasc_decode_end,
161  .capabilities = AV_CODEC_CAP_DR1,
162 };
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:117
int size
Definition: avcodec.h:1424
AVFrame * frame
Definition: aasc.c:38
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1722
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
Picture data structure.
Definition: avcodec.h:3745
AVCodec.
Definition: avcodec.h:3474
uint8_t
#define av_cold
Definition: attributes.h:74
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:135
8 bit with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:74
#define AVPALETTE_SIZE
Definition: pixfmt.h:33
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:363
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1617
uint8_t * data
Definition: avcodec.h:1423
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2998
#define av_log(a,...)
static av_cold int aasc_decode_end(AVCodecContext *avctx)
Definition: aasc.c:143
#define U(x)
Definition: vp56_arith.h:37
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:148
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
const char * name
Name of the codec implementation.
Definition: avcodec.h:3481
Libavcodec external API header.
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...
Definition: utils.c:1087
GetByteContext gb
Definition: aasc.c:37
uint32_t palette[AVPALETTE_COUNT]
Definition: aasc.c:40
#define FFMIN(a, b)
Definition: common.h:66
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1681
static av_cold int aasc_decode_init(AVCodecContext *avctx)
Definition: aasc.c:44
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:66
static int aasc_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: aasc.c:80
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
main external API structure.
Definition: avcodec.h:1502
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1534
void * buf
Definition: avisynth_c.h:553
int extradata_size
Definition: avcodec.h:1618
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
AVCodec ff_aasc_decoder
Definition: aasc.c:152
#define AVPALETTE_COUNT
Definition: pixfmt.h:34
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:522
common internal api header.
void * priv_data
Definition: avcodec.h:1544
int ff_msrle_decode(AVCodecContext *avctx, AVPicture *pic, int depth, GetByteContext *gb)
Decode stream in MS RLE format into frame.
Definition: msrledec.c:249
AVCodecContext * avctx
Definition: aasc.c:36
#define stride
#define MKTAG(a, b, c, d)
Definition: common.h:315
int palette_size
Definition: aasc.c:41
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1400
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:856