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49 int num_lens, num_codes, num_codes_sum;
62 for (
i = 0;
i < num_lens;
i++) {
64 num_codes_sum += num_codes;
66 if (num_codes_sum > 256) {
68 "Too many VLCs (%d) to be read.\n", num_codes_sum);
72 for (j = 0; j < num_codes; j++) {
81 symbols, 1, 1, 0, 0,
ctx->avctx);
89 VLC *vlc, uint8_t *outbuf)
99 pred[0] = top_left[0];
100 pred[1] = top_left[1];
101 pred[2] = top_left[2];
102 pred[3] = top_left[3];
104 for (
i = 0;
i <
ctx->avctx->width;
i++) {
145 top_left[0] = outbuf[0];
149 top_left[1] = outbuf[1];
150 top_left[2] = outbuf[2];
151 top_left[3] = outbuf[3];
158 int *top_left,
VLC *vlc, uint8_t *outbuf)
170 for (
i = 0;
i <
ctx->avctx->width;
i++) {
182 *top_left = outbuf[0];
188 int *top_left,
VLC *vlc, uint8_t *outbuf,
199 for (
i = 0;
i <
ctx->avctx->width >> is_chroma;
i++) {
210 *top_left = outbuf[0];
234 for (
i = 0;
i < 4;
i++) {
237 for (j = 0; j <
i; j++)
241 "Could not read code table %d.\n",
i);
253 for (
i = 0;
i < 4;
i++)
277 for (
i = 0;
i < 3;
i++) {
280 for (j = 0; j <
i; j++)
284 "Could not read code table %d.\n",
i);
291 for (j = 0; j < 3; j++)
297 for (
i = 0;
i < 3;
i++)
317 dst[0] = pic->
data[0];
318 dst[1] = pic->
data[1];
319 dst[2] = pic->
data[2];
330 for (
i = 0;
i < 2;
i++) {
333 for (j = 0; j <
i; j++)
337 "Could not read code table %d.\n",
i);
348 for (j = 0; j < 3; j++)
352 for (
i = 0;
i < 2;
i++)
359 int *got_picture_ptr,
AVPacket *avpkt)
362 const uint8_t *
src = avpkt->
data;
363 uint32_t info_tag, info_offset;
366 int coding_type,
ret;
368 if (avpkt->
size < 4 + 4) {
375 if (info_tag ==
MKTAG(
'I',
'N',
'F',
'O')) {
377 if (info_offset > UINT32_MAX - 8 || info_offset + 8 > avpkt->
size) {
379 "Invalid INFO header offset: 0x%08"PRIX32
" is too large.\n",
389 data_size = (avpkt->
size - info_offset) & ~1;
393 &
ctx->swapped_buf_size, data_size);
394 if (!
ctx->swapped_buf) {
400 ctx->bdsp.bswap16_buf((uint16_t *)
ctx->swapped_buf, (uint16_t *)
src,
420 switch (coding_type) {
466 *got_picture_ptr = 1;
487 ctx->swapped_buf_size = 0;
const FFCodec ff_cllc_decoder
int ff_vlc_init_from_lengths(VLC *vlc, int nb_bits, int nb_codes, const int8_t *lens, int lens_wrap, const void *symbols, int symbols_wrap, int symbols_size, int offset, int flags, void *logctx)
Build VLC decoding tables suitable for use with get_vlc2()
static int get_bits_left(GetBitContext *gb)
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
static int read_yuv_component_line(CLLCContext *ctx, GetBitContext *gb, int *top_left, VLC *vlc, uint8_t *outbuf, int is_chroma)
#define GET_VLC(code, name, gb, table, bits, max_depth)
If the vlc code is invalid and max_depth=1, then no bits will be removed.
This structure describes decoded (raw) audio or video data.
static int decode_rgb24_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
static const uint16_t table[]
#define UPDATE_CACHE(name, gb)
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call have so the codec calls ff_thread_report set FF_CODEC_CAP_ALLOCATE_PROGRESS in FFCodec caps_internal and use ff_thread_get_buffer() to allocate frames. Otherwise decode directly into the user-supplied frames. Call ff_thread_report_progress() after some part of the current picture has decoded. A good place to put this is where draw_horiz_band() is called - add this if it isn 't called anywhere
static void skip_bits(GetBitContext *s, int n)
static int read_rgb24_component_line(CLLCContext *ctx, GetBitContext *gb, int *top_left, VLC *vlc, uint8_t *outbuf)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
AVCodec p
The public AVCodec.
static int cllc_decode_frame(AVCodecContext *avctx, AVFrame *pic, int *got_picture_ptr, AVPacket *avpkt)
int ff_canopus_parse_info_tag(AVCodecContext *avctx, const uint8_t *src, size_t size)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
#define AV_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
#define CLOSE_READER(name, gb)
#define FF_CODEC_DECODE_CB(func)
int(* init)(AVBSFContext *ctx)
static av_cold int cllc_decode_close(AVCodecContext *avctx)
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
#define CODEC_LONG_NAME(str)
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
@ AV_PICTURE_TYPE_I
Intra.
enum AVPictureType pict_type
Picture type of the frame.
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
static int read_argb_line(CLLCContext *ctx, GetBitContext *gb, int *top_left, VLC *vlc, uint8_t *outbuf)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
static int read_code_table(CLLCContext *ctx, GetBitContext *gb, VLC *vlc)
static int decode_yuv_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
#define OPEN_READER(name, gb)
static av_cold int cllc_decode_init(AVCodecContext *avctx)
@ AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
#define i(width, name, range_min, range_max)
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some it can consider them to be part of the FIFO and delay acknowledging a status change accordingly Example code
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
const char * name
Name of the codec implementation.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
void ff_vlc_free(VLC *vlc)
static const float pred[4]
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
main external API structure.
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
static int decode_argb_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
#define avpriv_request_sample(...)
This structure stores compressed data.
int width
picture width / height.
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
The exact code depends on how similar the blocks are and how related they are to the block
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define MKTAG(a, b, c, d)