53 for (i = 0; i < 256; i++)
54 s->
palette[i] = (0xFFU << 24) | bytestream2_get_le32u(&gb);
78 int *x,
int width,
int linesize)
80 int remaining = width - *x;
82 int striplen =
FFMIN(count, remaining);
87 }
else if (pixel >= 0)
88 memset(*dst, pixel, striplen);
90 remaining -= striplen;
93 *dst += linesize -
width;
97 if (*dst >= dst_end)
goto exhausted;
99 if (*dst <= dst_end)
goto exhausted;
102 *x = width - remaining;
106 *x = width - remaining;
111 void *
data,
int *got_frame,
115 const int buf_size = avpkt->
size;
130 if (bytestream2_get_byte(&gb) != 0x42) {
134 if (bytestream2_get_byte(&gb)) {
142 #define OP(gb, pixel, count) \ 143 op(&dst, dst_end, (gb), (pixel), (count), &x, avctx->width, s->frame->linesize[0]) 145 int type = bytestream2_get_byte(&gb);
149 if (
OP(type ?
NULL : &gb, -1, count))
break;
152 count = bytestream2_get_byte(&gb);
153 pixel = bytestream2_get_byte(&gb);
154 if (
OP(
NULL, pixel, count))
break;
157 type = bytestream2_get_le16(&gb);
158 count = type & 0x3FFF;
169 pixel = type == 3 ? bytestream2_get_byte(&gb) : -1;
170 if (type == 1) count += 0x4000;
171 if (
OP(type == 2 ? &gb :
NULL, pixel, count))
break;
#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)
#define avpriv_request_sample(...)
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)
static av_always_inline unsigned int bytestream2_get_bufferu(GetByteContext *g, uint8_t *dst, unsigned int size)
#define OP(gb, pixel, count)
#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
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
static av_always_inline void bytestream2_skipu(GetByteContext *g, unsigned int size)
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
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. ...
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available...
const char * name
Name of the codec implementation.
static av_cold int decode_init(AVCodecContext *avctx)
int palette[AVPALETTE_COUNT]
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
main external API structure.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static int op(uint8_t **dst, const uint8_t *dst_end, GetByteContext *gb, int pixel, int count, int *x, int width, int linesize)
Perform decode operation.
common internal api header.
static av_cold int decode_end(AVCodecContext *avctx)
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
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.