60 int buf_size = avpkt->
size;
62 const unsigned char *encoded = buf;
63 unsigned char *pixptr, *pixptr_end;
65 unsigned int dlen, p, row;
66 const unsigned char *lp, *dp, *ep;
76 ep = encoded + buf_size;
79 dp = encoded + planes * (height << 1);
83 for (p = 0; p <
planes; p++) {
85 lp = encoded + p * (height << 1);
88 for (row = 0; row <
height; row++) {
89 pixptr = frame->
data[0] + row * frame->
linesize[0] + planemap[p];
90 pixptr_end = pixptr + frame->
linesize[0];
91 if (ep - lp < row * 2 + 2)
93 dlen =
av_be2ne16(*(
const unsigned short *)(lp + row * 2));
98 if ((count = *dp++) <= 127) {
101 if (pixptr_end - pixptr < count * px_inc)
111 if (pixptr_end - pixptr < count * px_inc)
176 c->
planemap[0] = HAVE_BIGENDIAN ? 1 : 2;
177 c->
planemap[1] = HAVE_BIGENDIAN ? 2 : 1;
178 c->
planemap[2] = HAVE_BIGENDIAN ? 3 : 0;
179 c->
planemap[3] = HAVE_BIGENDIAN ? 0 : 3;
int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Select the (possibly hardware accelerated) pixel format.
#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)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
AVCodec ff_eightbps_decoder
8 bits with AV_PIX_FMT_RGB32 palette
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
common internal API header
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
packed RGB 8:8:8, 24bpp, BGRBGR...
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
static av_cold int decode_init(AVCodecContext *avctx)
int palette_has_changed
Tell user application that palette has changed from previous frame.
static enum AVPixelFormat pixfmt_rgb24[]
unsigned char planemap[4]
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal api header.
AVPixelFormat
Pixel format.
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
#define AV_PIX_FMT_0RGB32