53 if (!
s->last_frame || !
s->last2_frame)
65 for (
i=0;
i <
s->avctx->height && buf_end - buf >=
s->avctx->width;
i++) {
66 memcpy(dst, buf,
s->avctx->width);
68 buf +=
s->avctx->width;
72 static void cmv_motcomp(
unsigned char *dst, ptrdiff_t dst_stride,
73 const unsigned char *
src, ptrdiff_t src_stride,
75 int xoffset,
int yoffset,
82 if (
i+xoffset>=0 &&
i+xoffset<
width &&
83 j+yoffset>=0 && j+yoffset<
height) {
84 dst[j*dst_stride +
i] =
src[(j+yoffset)*src_stride +
i+xoffset];
86 dst[j*dst_stride +
i] = 0;
94 const uint8_t *raw = buf + (
s->avctx->width*
s->avctx->height/16);
98 for(y=0; y<
s->avctx->height/4; y++)
99 for(x=0; x<
s->avctx->width/4 && buf_end - buf >
i; x++) {
102 if (raw+16<buf_end && *raw==0xFF) {
109 }
else if(raw<buf_end) {
110 int xoffset = (*raw & 0xF) - 7;
111 int yoffset = ((*raw >> 4)) - 7;
112 if (
s->last2_frame->data[0])
114 s->last2_frame->data[0],
s->last2_frame->linesize[0],
115 x*4, y*4, xoffset, yoffset,
s->avctx->width,
s->avctx->height);
119 int xoffset = (buf[
i] & 0xF) - 7;
120 int yoffset = ((buf[
i] >> 4)) - 7;
121 if (
s->last_frame->data[0])
123 s->last_frame->data[0],
s->last_frame->linesize[0],
124 x*4, y*4, xoffset, yoffset,
s->avctx->width,
s->avctx->height);
132 int pal_start, pal_count,
i, ret, fps;
134 if(buf_end - buf < 16) {
142 if (
s->width !=
s->avctx->width ||
143 s->height !=
s->avctx->height) {
161 s->palette[
i] = 0xFFU << 24 |
AV_RB24(buf);
168 #define EA_PREAMBLE_SIZE 8
169 #define MVIh_TAG MKTAG('M', 'V', 'I', 'h')
172 void *
data,
int *got_frame,
176 int buf_size = avpkt->
size;
178 const uint8_t *buf_end = buf + buf_size;
Libavcodec external API header.
static av_cold int init(AVCodecContext *avctx)
common internal and external API header
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
static int cmv_process_header(CmvContext *s, const uint8_t *buf, const uint8_t *buf_end)
static void cmv_decode_inter(CmvContext *s, AVFrame *frame, const uint8_t *buf, const uint8_t *buf_end)
static av_cold int cmv_decode_init(AVCodecContext *avctx)
static av_cold int cmv_decode_end(AVCodecContext *avctx)
static int cmv_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static void cmv_decode_intra(CmvContext *s, AVFrame *frame, const uint8_t *buf, const uint8_t *buf_end)
static void cmv_motcomp(unsigned char *dst, ptrdiff_t dst_stride, const unsigned char *src, ptrdiff_t src_stride, int x, int y, int xoffset, int yoffset, int width, int height)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
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_WARNING
Something somehow does not look correct.
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
@ AV_PICTURE_TYPE_I
Intra.
@ AV_PICTURE_TYPE_P
Predicted.
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
@ 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.
const char * name
Name of the codec implementation.
This structure describes decoded (raw) audio or video data.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
int key_frame
1 -> keyframe, 0-> not
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
enum AVPictureType pict_type
Picture type of the frame.
This structure stores compressed data.
Rational number (pair of numerator and denominator).
unsigned int palette[AVPALETTE_COUNT]
AVFrame * last2_frame
second-last