44 #define COLORS_PER_TABLE 256 61 #define GET_BLOCK_COUNT() \ 62 (opcode & 0x10) ? (1 + bytestream2_get_byte(&s->gb)) : 1 + (opcode & 0x0F); 64 #define ADVANCE_BLOCK() \ 67 if (pixel_ptr >= width) \ 70 row_ptr += stride * 4; \ 73 if (total_blocks < !!n_blocks) \ 75 av_log(s->avctx, AV_LOG_INFO, "warning: block counter just went negative (this should not happen)\n"); \ 90 unsigned int color_flags;
91 unsigned int color_flags_a;
92 unsigned int color_flags_b;
93 unsigned int flag_mask;
95 unsigned char *
const pixels = s->
frame->
data[0];
100 int pixel_x, pixel_y;
101 int row_inc = stride - 4;
104 int prev_block_ptr1, prev_block_ptr2;
107 int color_table_index;
110 int color_pair_index = 0;
111 int color_quad_index = 0;
112 int color_octet_index = 0;
118 chunk_size = bytestream2_get_be24(&s->
gb);
119 if (chunk_size != buf_size)
120 av_log(s->
avctx,
AV_LOG_INFO,
"warning: MOV chunk size != encoded chunk size (%d != %d); using MOV chunk size\n",
121 chunk_size, buf_size);
123 chunk_size = buf_size;
127 while (total_blocks) {
130 if (row_ptr >= image_size) {
132 row_ptr, image_size);
140 opcode = bytestream2_get_byte(&s->
gb);
141 switch (opcode & 0xF0) {
157 if ((row_ptr == 0) && (pixel_ptr == 0)) {
168 prev_block_ptr1 = row_ptr + pixel_ptr - 4;
171 block_ptr = row_ptr + pixel_ptr;
172 prev_block_ptr = prev_block_ptr1;
173 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
174 for (pixel_x = 0; pixel_x < 4; pixel_x++) {
175 pixels[block_ptr++] = pixels[prev_block_ptr++];
177 block_ptr += row_inc;
178 prev_block_ptr += row_inc;
191 if ((row_ptr == 0) && (pixel_ptr < 2 * 4)) {
192 av_log(s->
avctx,
AV_LOG_INFO,
"encountered repeat block opcode (%02X) but not enough blocks rendered yet\n",
199 prev_block_ptr1 = (row_ptr - s->
avctx->
width * 4) +
201 else if (pixel_ptr == 4)
202 prev_block_ptr1 = (row_ptr - s->
avctx->
width * 4) + row_inc;
204 prev_block_ptr1 = row_ptr + pixel_ptr - 4 * 2;
207 prev_block_ptr2 = (row_ptr - s->
avctx->
width * 4) + row_inc;
209 prev_block_ptr2 = row_ptr + pixel_ptr - 4;
213 block_ptr = row_ptr + pixel_ptr;
215 prev_block_ptr = prev_block_ptr2;
217 prev_block_ptr = prev_block_ptr1;
218 prev_block_flag = !prev_block_flag;
220 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
221 for (pixel_x = 0; pixel_x < 4; pixel_x++) {
222 pixels[block_ptr++] = pixels[prev_block_ptr++];
224 block_ptr += row_inc;
225 prev_block_ptr += row_inc;
235 pixel = bytestream2_get_byte(&s->
gb);
238 block_ptr = row_ptr + pixel_ptr;
239 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
240 for (pixel_x = 0; pixel_x < 4; pixel_x++) {
241 pixels[block_ptr++] =
pixel;
243 block_ptr += row_inc;
252 n_blocks = (opcode & 0x0F) + 1;
255 if ((opcode & 0xF0) == 0x80) {
258 for (i = 0; i <
CPAIR; i++) {
259 pixel = bytestream2_get_byte(&s->
gb);
260 color_table_index = CPAIR * color_pair_index +
i;
264 color_table_index = CPAIR * color_pair_index;
268 color_pair_index = 0;
270 color_table_index =
CPAIR * bytestream2_get_byte(&s->
gb);
273 color_flags = bytestream2_get_be16(&s->
gb);
275 block_ptr = row_ptr + pixel_ptr;
276 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
277 for (pixel_x = 0; pixel_x < 4; pixel_x++) {
278 if (color_flags & flag_mask)
279 pixel = color_table_index + 1;
281 pixel = color_table_index;
285 block_ptr += row_inc;
294 n_blocks = (opcode & 0x0F) + 1;
297 if ((opcode & 0xF0) == 0xA0) {
300 for (i = 0; i <
CQUAD; i++) {
301 pixel = bytestream2_get_byte(&s->
gb);
302 color_table_index = CQUAD * color_quad_index +
i;
306 color_table_index = CQUAD * color_quad_index;
310 color_quad_index = 0;
312 color_table_index =
CQUAD * bytestream2_get_byte(&s->
gb);
315 color_flags = bytestream2_get_be32(&s->
gb);
318 block_ptr = row_ptr + pixel_ptr;
319 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
320 for (pixel_x = 0; pixel_x < 4; pixel_x++) {
321 pixel = color_table_index +
322 ((color_flags >> flag_mask) & 0x03);
326 block_ptr += row_inc;
335 n_blocks = (opcode & 0x0F) + 1;
338 if ((opcode & 0xF0) == 0xC0) {
341 for (i = 0; i <
COCTET; i++) {
342 pixel = bytestream2_get_byte(&s->
gb);
343 color_table_index = COCTET * color_octet_index +
i;
347 color_table_index = COCTET * color_octet_index;
351 color_octet_index = 0;
353 color_table_index =
COCTET * bytestream2_get_byte(&s->
gb);
363 int val1 = bytestream2_get_be16(&s->
gb);
364 int val2 = bytestream2_get_be16(&s->
gb);
365 int val3 = bytestream2_get_be16(&s->
gb);
366 color_flags_a = ((val1 & 0xFFF0) << 8) | (val2 >> 4);
367 color_flags_b = ((val3 & 0xFFF0) << 8) |
368 ((val1 & 0x0F) << 8) | ((val2 & 0x0F) << 4) | (val3 & 0x0F);
370 color_flags = color_flags_a;
373 block_ptr = row_ptr + pixel_ptr;
374 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
377 color_flags = color_flags_b;
380 for (pixel_x = 0; pixel_x < 4; pixel_x++) {
381 pixel = color_table_index +
382 ((color_flags >> flag_mask) & 0x07);
386 block_ptr += row_inc;
394 n_blocks = (opcode & 0x0F) + 1;
397 block_ptr = row_ptr + pixel_ptr;
398 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
399 for (pixel_x = 0; pixel_x < 4; pixel_x++) {
400 pixels[block_ptr++] = bytestream2_get_byte(&s->
gb);
402 block_ptr += row_inc;
432 void *
data,
int *got_frame,
436 int buf_size = avpkt->
size;
443 if (total_blocks / 1024 > avpkt->
size)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static av_cold int smc_decode_init(AVCodecContext *avctx)
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static av_cold int init(AVCodecContext *avctx)
#define avpriv_request_sample(...)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static int smc_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
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)
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
unsigned char color_quads[COLORS_PER_TABLE *CQUAD]
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
8 bits with AV_PIX_FMT_RGB32 palette
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_size(GetByteContext *g)
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...
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
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...
const char * name
Name of the codec implementation.
unsigned char color_pairs[COLORS_PER_TABLE *CPAIR]
int width
picture width / height.
static av_cold int smc_decode_end(AVCodecContext *avctx)
#define AV_LOG_INFO
Standard information.
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
unsigned char color_octets[COLORS_PER_TABLE *COCTET]
main external API structure.
int palette_has_changed
Tell user application that palette has changed from previous frame.
static void smc_decode_stream(SmcContext *s)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
GLint GLenum GLboolean GLsizei stride
common internal api header.
#define GET_BLOCK_COUNT()
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.