31 #include "libavutil/common.h"
32 #include "libavutil/intreadwrite.h"
35 #define CHARSET_CHARS 256
37 #define CROP_SCREENS 1
65 static const int mc_colors[5]={0x0,0xb,0xc,0xf,0x1};
73 int blockx, blocky, x,
y;
79 for (blocky = 0; blocky <
C64YRES; blocky += 8) {
80 for (blockx = 0; blockx <
C64XRES; blockx += 8) {
81 for (y = blocky; y < blocky + 8 && y <
C64YRES; y++) {
82 for (x = blockx; x < blockx + 8 && x <
C64XRES; x += 2) {
83 if(x < width && y < height) {
85 luma = (src[(x + 0 + y * p->
linesize[0])] +
86 src[(x + 1 + y * p->
linesize[0])]) / 2;
105 int lowdiff, highdiff;
115 for (a=0; a < 256; a++) {
116 if(i < c->mc_pal_size -1 && a == c->
mc_luma_vals[i + 1]) {
132 for (y = 0; y < 8; y++) {
134 for (x = 0; x < 4; x++) {
135 pix = best_cb[y * 4 + x];
138 if (index1[pix] >= 3)
148 row1 |= 3-(index2[pix] & 3);
150 row1 |= 3-(index1[pix] & 3);
153 row2 |= 3-(index2[pix] & 3);
155 row2 |= 3-(index1[pix] & 3);
159 row1 |= 3-(index2[pix] & 3);
161 row1 |= 3-(index1[pix] & 3);
164 charset[y+0x000] = row1;
168 if (highdiff > 0 && lowdiff > 0 && c->
mc_use_5col) {
169 if (lowdiff > highdiff) {
170 for (x = 0; x < 32; x++)
173 for (x = 0; x < 32; x++)
184 colrammap[charpos] = (highdiff > 0);
261 for (a = 0; a < 256; a++) {
262 temp = colram[charmap[a + 0x000]] << 0;
263 temp |= colram[charmap[a + 0x100]] << 1;
264 temp |= colram[charmap[a + 0x200]] << 2;
265 if (a < 0xe8) temp |= colram[charmap[a + 0x300]] << 3;
271 const AVFrame *pict,
int *got_packet)
297 screen_size = b_width * b_height;
335 req_size = charset_size + c->
mc_lifetime*(screen_size + colram_size);
348 memcpy(buf, charset, charset_size);
352 charset += charset_size;
358 for (y = 0; y < b_height; y++) {
359 for (x = 0; x < b_width; x++) {
360 buf[y * b_width + x] = charmap[y * b_width + x];
365 req_size += screen_size;
372 req_size += colram_size;
389 pkt->
size = req_size;
391 *got_packet = !!req_size;
396 #if CONFIG_A64MULTI_ENCODER
397 AVCodec ff_a64multi_encoder = {
410 #if CONFIG_A64MULTI5_ENCODER
411 AVCodec ff_a64multi5_encoder = {
413 .long_name =
NULL_IF_CONFIG_SMALL(
"Multicolor charset for Commodore 64, extended with 5th color (colram)"),
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size)
Check AVPacket size and/or allocate data.
This structure describes decoded (raw) audio or video data.
static av_cold int init(AVCodecContext *avctx)
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
static av_cold int a64multi_init_encoder(AVCodecContext *avctx)
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
const char * name
Name of the codec implementation.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
#define CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
static const uint8_t dither[8][8]
a64 video encoder - tables used by a64 encoders
static void to_meta_with_crop(AVCodecContext *avctx, AVFrame *p, int *dest)
AVPixelFormat
Pixel format.
int flags
A combination of AV_PKT_FLAG values.
static float distance(float x, float y, int band)
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
void ff_do_elbg(int *points, int dim, int numpoints, int *codebook, int numCB, int max_steps, int *closest_cb, AVLFG *rand_state)
Implementation of the Enhanced LBG Algorithm Based on the paper "Neural Networks 14:1219-1237" that c...
enum AVPictureType pict_type
Picture type of the frame.
unsigned mc_frame_counter
static void a64_compress_colram(unsigned char *buf, int *charmap, uint8_t *colram)
int width
picture width / height.
void * av_malloc(size_t size) av_malloc_attrib 1(1)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
#define AV_LOG_INFO
Standard information.
static void render_charset(AVCodecContext *avctx, uint8_t *charset, uint8_t *colrammap)
void av_lfg_init(AVLFG *c, unsigned int seed)
main external API structure.
static void close(AVCodecParserContext *s)
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
BYTE int const BYTE int int int height
void avcodec_get_frame_defaults(AVFrame *frame)
Set the fields of the given AVFrame to default values.
a64 video encoder - c64 colors in rgb
AVFrame * coded_frame
the picture in the bitstream
static int a64multi_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
static const int mc_colors[5]
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
void ff_init_elbg(int *points, int dim, int numpoints, int *codebook, int numCB, int max_steps, int *closest_cb, AVLFG *rand_state)
Initialize the **codebook vector for the elbg algorithm.
int global_quality
Global quality for codecs which cannot change it per frame.
common internal api header.
static const uint8_t a64_palette[16][3]
static const uint8_t interlaced_dither_patterns[9][8][4]
int key_frame
1 -> keyframe, 0-> not
#define FF_QP2LAMBDA
factor to convert from H.263 QP to lambda
static av_cold int a64multi_close_encoder(AVCodecContext *avctx)
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
This structure stores compressed data.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
#define AV_NOPTS_VALUE
Undefined timestamp value.
void * av_mallocz(size_t size) av_malloc_attrib 1(1)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
static const uint8_t multi_dither_patterns[9][4][4]
dither patterns used vor rendering the multicolor charset