83 n = (chunk_id & 0x04) ? 4 : 6;
87 for (i=0; i < 256; i++) {
88 if ((chunk_id & 0x01) && !(mask >>= 1)) {
97 if (!(chunk_id & 0x01) || (flag & mask)) {
102 codebook[i].
y0 = *data++;
103 codebook[i].
y1 = *data++;
104 codebook[i].
y2 = *data++;
105 codebook[i].
y3 = *data++;
106 codebook[i].
u = 128 + *data++;
107 codebook[i].
v = 128 + *data++;
113 codebook[i].
y0 = *data++;
114 codebook[i].
y1 = *data++;
115 codebook[i].
y2 = *data++;
116 codebook[i].
y3 = *data++;
138 for (y=strip->
y1; y < strip->y2; y+=4) {
149 for (x=strip->
x1; x < strip->x2; x+=4) {
150 if ((chunk_id & 0x01) && !(mask >>= 1)) {
151 if ((data + 4) > eod)
159 if (!(chunk_id & 0x01) || (flag & mask)) {
160 if (!(chunk_id & 0x02) && !(mask >>= 1)) {
161 if ((data + 4) > eod)
169 if ((chunk_id & 0x02) || (~flag & mask)) {
210 }
else if (flag & mask) {
211 if ((data + 4) > eod)
257 iy[0] += 4; iy[1] += 4;
258 iy[2] += 4; iy[3] += 4;
259 iu[0] += 2; iu[1] += 2;
260 iv[0] += 2; iv[1] += 2;
271 int chunk_id, chunk_size;
276 strip->
x1 >= strip->
x2 || strip->
y1 >= strip->
y2)
279 while ((data + 4) <= eod) {
281 chunk_size =
AV_RB24 (&data[1]) - 4;
286 chunk_size = ((data + chunk_size) > eod) ? (eod -
data) : chunk_size;
322 int i, result, strip_size, frame_flags, num_strips;
324 int encoded_buf_size;
329 frame_flags = s->
data[0];
335 if (!encoded_buf_size) {
339 if (encoded_buf_size != s->
size && (s->
size % encoded_buf_size) != 0) {
347 (s->
data[10] == 0xFE) &&
348 (s->
data[11] == 0x00) &&
349 (s->
data[12] == 0x00) &&
350 (s->
data[13] == 0x06) &&
351 (s->
data[14] == 0x00) &&
352 (s->
data[15] == 0x00))
364 for (i=0; i < num_strips; i++) {
365 if ((s->
data + 12) > eod)
378 strip_size = ((s->
data + strip_size) > eod) ? (eod - s->
data) : strip_size;
380 if ((i > 0) && !(frame_flags & 0x01)) {
392 s->
data += strip_size;
422 void *
data,
int *got_frame,
426 int ret = 0, buf_size = avpkt->
size;
cvid_strip strips[MAX_STRIPS]
This structure describes decoded (raw) audio or video data.
cvid_codebook v4_codebook[256]
int buffer_hints
codec suggestion on buffer type if != 0
void(* release_buffer)(struct AVCodecContext *c, AVFrame *pic)
Called to release buffers which were allocated with get_buffer.
static int cinepak_decode(CinepakContext *s)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
int(* reget_buffer)(struct AVCodecContext *c, AVFrame *pic)
Called at the beginning of a frame to get cr buffer for it.
AVCodec ff_cinepak_decoder
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
static int cinepak_decode_strip(CinepakContext *s, cvid_strip *strip, const uint8_t *data, int size)
static int cinepak_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
8 bit with PIX_FMT_RGB32 palette
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
static int init(AVCodecParserContext *s)
void av_log_ask_for_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message asking for a sample.
static const uint16_t mask[17]
int reference
is this picture used as reference The values for this are the same as the MpegEncContext.picture_structure variable, that is 1->top field, 2->bottom field, 3->frame/both fields.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void av_log(void *avcl, int level, const char *fmt,...)
const char * name
Name of the codec implementation.
const unsigned char * data
int width
picture width / height.
static int cinepak_decode_vectors(CinepakContext *s, cvid_strip *strip, int chunk_id, int size, const uint8_t *data)
int linesize[AV_NUM_DATA_POINTERS]
Size, in bytes, of the data for each picture/channel plane.
main external API structure.
static void close(AVCodecParserContext *s)
static av_cold int cinepak_decode_init(AVCodecContext *avctx)
static void cinepak_decode_codebook(cvid_codebook *codebook, int chunk_id, int size, const uint8_t *data)
int palette_has_changed
Tell user application that palette has changed from previous frame.
#define FF_BUFFER_HINTS_REUSABLE
#define FF_BUFFER_HINTS_PRESERVE
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
common internal and external API header
#define AVERROR_INVALIDDATA
cvid_codebook v1_codebook[256]
#define AVERROR_PATCHWELCOME
#define FF_BUFFER_HINTS_VALID
uint8_t * av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
This structure stores compressed data.
struct CinepakContext CinepakContext
static av_cold int cinepak_decode_end(AVCodecContext *avctx)