25 #define BITSTREAM_READER_LE
65 ((unsigned)avctx->
height / 8);
75 for (i = 0; i < 3; i++)
100 for (i = 0; i <
size; i++) {
101 unsigned mask_bits =
get_bits(gb, 4);
105 for (j = 0; j < 4; j++) {
106 if (mask_bits & (1 << j))
127 if (value != (1 + ((1 << 3) - 1)))
131 if (value != (1 + ((1 << 3) - 1)) + ((1 << 7) - 1))
138 int* codebook_index,
int superblock_index)
142 unsigned block_index,
depth;
145 static const char transitions[3][2] = { {2, 1}, {0, 2}, {1, 0} };
146 *codebook_index = transitions[*codebook_index][
get_bits1(gb)];
154 block_index = depth ?
get_bits(gb, depth) : 0;
156 if (*codebook_index == 1) {
170 uint32_t *dst = sb->
pixels32 + index + (index & -4);
178 uint16_t*
src,
unsigned src_stride)
182 for (y = 0; y < 8; y++)
183 memcpy(dest + y * dest_stride, src + y * src_stride,
184 sizeof(uint16_t) * 8);
186 for (y = 0; y < 8; y++)
187 memset(dest + y * dest_stride, 0,
sizeof(uint16_t) * 8);
191 0x4, 0x8, 0x40, 0x80,
192 0x100, 0x200, 0x1000, 0x2000,
193 0x400, 0x800, 0x4000, 0x8000};
196 void *
data,
int *got_frame,
199 int buf_size = avpkt->
size;
207 unsigned superblock_index, cb_index = 1,
208 superblock_col_index = 0,
209 superblocks_per_row = avctx->
width / 8, skip = -1;
211 uint16_t* old_frame_data, *new_frame_data;
212 unsigned old_stride, new_stride;
229 if (!(frame_flags & 0x114) || !(frame_flags & 0x7800000)) {
242 for (i = 0; i < 3; i++) {
243 if (frame_flags & (1 << (17 + i))) {
244 unsigned cb_depth, cb_size;
249 cb_depth =
av_log2(cb_size - 1) + 1;
255 cb_size = 1 << cb_depth;
273 new_frame_data = (uint16_t*)frame->
data[0];
274 new_stride = frame->
linesize[0] / 2;
275 old_frame_data = (uint16_t*)s->
frame.
data[0];
279 superblock_index++) {
282 unsigned multi_mask = 0;
292 old_frame_data, old_stride);
295 old_frame_data, old_stride);
302 for (i = 0; i < 16; i++) {
310 unsigned inv_mask =
get_bits(&gb, 4);
311 for (i = 0; i < 4; i++) {
312 if (inv_mask & (1 << i)) {
313 multi_mask ^= 0xF << i*4;
315 multi_mask ^=
get_bits(&gb, 4) << i*4;
319 for (i = 0; i < 16; i++) {
326 }
else if (frame_flags & (1 << 16)) {
336 superblock_col_index++;
340 if (superblock_col_index == superblocks_per_row) {
341 new_frame_data += new_stride * 8 - superblocks_per_row * 8;
343 old_frame_data += old_stride * 8 - superblocks_per_row * 8;
344 superblock_col_index = 0;
350 "Escape sizes: %i, %i, %i\n",
static const uint16_t mask_matrix[]
This structure describes decoded (raw) audio or video data.
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
static av_cold int init(AVCodecContext *avctx)
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static void insert_mb_into_sb(SuperBlock *sb, MacroBlock mb, unsigned index)
static double cb(void *priv, double x, double y)
#define AV_PIX_FMT_RGB555
static unsigned decode_skip_count(GetBitContext *gb)
const char * name
Name of the codec implementation.
int av_frame_ref(AVFrame *dst, AVFrame *src)
Setup a new reference to the data described by a given frame.
static void copy_superblock(uint16_t *dest, unsigned dest_stride, uint16_t *src, unsigned src_stride)
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
static int get_bits_count(const GetBitContext *s)
bitstream reader API header.
static const uint8_t frame_size[4]
static int get_bits_left(GetBitContext *gb)
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
static const uint16_t mask[17]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Libavcodec external API header.
static av_cold int escape124_decode_close(AVCodecContext *avctx)
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
int width
picture width / height.
void * av_malloc(size_t size) av_malloc_attrib 1(1)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
AVCodec ff_escape124_decoder
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
main external API structure.
static void close(AVCodecParserContext *s)
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
static unsigned int get_bits1(GetBitContext *s)
void avcodec_get_frame_defaults(AVFrame *frame)
Set the fields of the given AVFrame to default values.
static CodeBook unpack_codebook(GetBitContext *gb, unsigned depth, unsigned size)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
common internal api header.
#define AVERROR_INVALIDDATA
static av_cold int escape124_decode_init(AVCodecContext *avctx)
Initialize the decoder.
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
This structure stores compressed data.
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static MacroBlock decode_macroblock(Escape124Context *s, GetBitContext *gb, int *codebook_index, int superblock_index)
static int escape124_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)