55 uint32_t *palette = (uint32_t *)ctx->
frame->
data[1];
61 for(
a = 0;
a < 256;
a++){
62 palette[
a] = 0xFF
U << 24 | bytestream2_get_be24u(&ctx->
g) * 4;
63 palette[
a] |= palette[
a] >> 6 & 0x30303;
70 void *
data,
int *got_frame,
77 int remaining = avctx->
width;
78 int wrap_to_next_line;
98 switch(block_type = bytestream2_get_byte(&vid->
g)){
108 yoffset = bytestream2_get_le16(&vid->
g);
109 if(yoffset >= avctx->
height)
120 while((code = bytestream2_get_byte(&vid->
g))){
124 while(length > remaining){
128 memset(dst, bytestream2_peek_byte(&vid->
g), remaining);
130 dst += remaining + wrap_to_next_line;
131 remaining = avctx->
width;
140 memset(dst, bytestream2_get_byte(&vid->
g), length);
162 .
name =
"bethsoftvid",
#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)
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
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)
AVCodec ff_bethsoftvid_decoder
#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
static av_cold int end(AVCodecContext *avctx)
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
#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...
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...
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
enum AVPacketSideDataType type
const char * name
Name of the codec implementation.
static int bethsoftvid_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static void frame_end(MpegEncContext *s)
int width
picture width / height.
static int set_palette(BethsoftvidContext *ctx)
static av_always_inline int bytestream2_tell(GetByteContext *g)
Libavcodec external API header.
static av_cold int bethsoftvid_decode_end(AVCodecContext *avctx)
static av_cold int bethsoftvid_decode_init(AVCodecContext *avctx)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
int palette_has_changed
Tell user application that palette has changed from previous frame.
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
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
common internal api header.
common internal and external API header
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.