39 #define MM_PREAMBLE_SIZE 6 41 #define MM_TYPE_INTER 0x5 42 #define MM_TYPE_INTRA 0x8 43 #define MM_TYPE_INTRA_HH 0xc 44 #define MM_TYPE_INTER_HH 0xd 45 #define MM_TYPE_INTRA_HHV 0xe 46 #define MM_TYPE_INTER_HHV 0xf 47 #define MM_TYPE_PALETTE 0x31 83 for (i = 0; i < 128; i++) {
84 s->
palette[
i] = 0xFF
U << 24 | bytestream2_get_be24(&s->
gb);
98 int run_length,
color;
103 color = bytestream2_get_byte(&s->
gb);
107 run_length = (color & 0x7f) + 2;
108 color = bytestream2_get_byte(&s->
gb);
139 int data_off = bytestream2_get_le16(&s->
gb);
149 int length = bytestream2_get_byte(&s->
gb);
150 int x = bytestream2_get_byte(&s->
gb) + ((length & 0x80) << 1);
162 int replace_array = bytestream2_get_byte(&s->
gb);
164 int replace = (replace_array >> (7-j)) & 1;
168 int color = bytestream2_get_byte(&data_ptr);
189 void *
data,
int *got_frame,
193 int buf_size = avpkt->
size;
unsigned int palette[AVPALETTE_COUNT]
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
static int mm_decode_intra(MmContext *s, int half_horiz, int half_vert)
ptrdiff_t const GLvoid * data
static av_cold int init(AVCodecContext *avctx)
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)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
8 bits with AV_PIX_FMT_RGB32 palette
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
static int mm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
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.
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...
static av_cold int mm_decode_end(AVCodecContext *avctx)
const char * name
Name of the codec implementation.
int width
picture width / height.
#define MM_TYPE_INTRA_HHV
AVCodec ff_mmvideo_decoder
static int mm_decode_inter(MmContext *s, int half_horiz, int half_vert)
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
static av_cold int mm_decode_init(AVCodecContext *avctx)
const uint8_t * buffer_start
#define MM_TYPE_INTER_HHV
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal 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
static uint8_t half_vert(BlockXY bxy)
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
static void mm_decode_pal(MmContext *s)