27 #define SGI_SINGLE_CHAN 2
28 #define SGI_MULTI_CHAN 3
45 int buf_size,
void *
data)
49 uint8_t *offsettab, *lengthtab, *in_buf, *encode_buf;
50 int x, y, z, length, tablesize;
52 unsigned char *orig_buf = buf, *end_buf = buf + buf_size;
78 tablesize = depth * height * 4;
81 if (buf_size < length) {
82 av_log(avctx,
AV_LOG_ERROR,
"buf_size too small(need %d, got %d)\n", length, buf_size);
89 bytestream_put_byte(&buf, 1);
90 bytestream_put_be16(&buf, dimension);
91 bytestream_put_be16(&buf, width);
92 bytestream_put_be16(&buf, height);
93 bytestream_put_be16(&buf, depth);
96 bytestream_put_be32(&buf, 0L);
97 bytestream_put_be32(&buf, 255L);
98 bytestream_put_be32(&buf, 0L);
101 memset(buf, 0, SGI_HEADER_SIZE);
105 bytestream_put_be32(&buf, 0L);
123 for (z = 0; z <
depth; z++) {
124 in_buf = p->
data[0] + p->
linesize[0] * (height - 1) + z;
126 for (y = 0; y <
height; y++) {
127 bytestream_put_be32(&offsettab, buf - orig_buf);
129 for (x = 0; x <
width; x++)
130 encode_buf[x] = in_buf[depth * x];
132 if ((length =
ff_rle_encode(buf, end_buf - buf - 1, encode_buf, 1, width, 0, 0, 0x80, 0)) < 1) {
138 bytestream_put_byte(&buf, 0);
139 bytestream_put_be32(&lengthtab, length + 1);
146 for (z = 0; z <
depth; z++) {
147 in_buf = p->
data[0] + p->
linesize[0] * (height - 1) + z;
149 for (y = 0; y <
height; y++) {
151 bytestream_put_byte(&buf, in_buf[x]);
159 return buf - orig_buf;
enum PixelFormat pix_fmt
Pixel format, see PIX_FMT_xxx.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
AVFrame * coded_frame
the picture in the bitstream
struct SgiContext SgiContext
static int init(AVCodecParserContext *s)
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void av_log(void *avcl, int level, const char *fmt,...)
const char * name
Name of the codec implementation.
enum AVPictureType pict_type
Picture type of the frame, see ?_TYPE below.
int width
picture width / height.
static av_cold int encode_init(AVCodecContext *avctx)
int linesize[AV_NUM_DATA_POINTERS]
Size, in bytes, of the data for each picture/channel plane.
main external API structure.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
#define SGI_MAGIC
SGI image file signature.
#define FF_CODER_TYPE_RAW
packed RGB 8:8:8, 24bpp, RGBRGB...
int key_frame
1 -> keyframe, 0-> not
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
void avcodec_get_frame_defaults(AVFrame *pic)
Set the fields of the given AVFrame to default values.
int ff_rle_encode(uint8_t *outbuf, int out_size, const uint8_t *ptr, int bpp, int w, int add_rep, int xor_rep, int add_raw, int xor_raw)
RLE compress the row, with maximum size of out_size.
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data)