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] = 0xFFU << 24 | bytestream2_get_be24(&
s->gb);
85 s->palette[
i+128] =
s->palette[
i]<<2;
98 int run_length,
color;
100 if (y >=
s->avctx->height)
103 color = bytestream2_get_byte(&
s->gb);
107 run_length = (
color & 0x7f) + 2;
108 color = bytestream2_get_byte(&
s->gb);
114 if (run_length >
s->avctx->width - x)
118 memset(
s->frame->data[0] + y*
s->frame->linesize[0] + x,
color, run_length);
119 if (
half_vert && y + half_vert < s->avctx->height)
120 memset(
s->frame->data[0] + (y+1)*
s->frame->linesize[0] + x,
color, run_length);
124 if (x >=
s->avctx->width) {
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);
161 for(
i=0;
i<length;
i++) {
162 int replace_array = bytestream2_get_byte(&
s->gb);
164 int replace = (replace_array >> (7-j)) & 1;
165 if (x + half_horiz >=
s->avctx->width)
168 int color = bytestream2_get_byte(&data_ptr);
169 s->frame->data[0][y*
s->frame->linesize[0] + x] =
color;
171 s->frame->data[0][y*
s->frame->linesize[0] + x + 1] =
color;
173 s->frame->data[0][(y+1)*
s->frame->linesize[0] + x] =
color;
175 s->frame->data[0][(y+1)*
s->frame->linesize[0] + x + 1] =
color;
189 void *
data,
int *got_frame,
193 int buf_size = avpkt->
size;
Libavcodec external API header.
static av_cold int init(AVCodecContext *avctx)
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
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 void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
#define MM_TYPE_INTRA_HHV
static void mm_decode_pal(MmContext *s)
static av_cold int mm_decode_init(AVCodecContext *avctx)
static av_cold int mm_decode_end(AVCodecContext *avctx)
#define MM_TYPE_INTER_HHV
static int mm_decode_inter(MmContext *s, int half_horiz, int half_vert)
AVCodec ff_mmvideo_decoder
static int mm_decode_intra(MmContext *s, int half_horiz, int half_vert)
static int mm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static uint8_t half_vert(BlockXY bxy)
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
main external API structure.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
int width
picture width / height.
const char * name
Name of the codec implementation.
This structure describes decoded (raw) audio or video data.
This structure stores compressed data.
const uint8_t * buffer_start
unsigned int palette[AVPALETTE_COUNT]