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Diffstat (limited to 'ffmpeg/libavcodec/a64multienc.c')
-rw-r--r--ffmpeg/libavcodec/a64multienc.c425
1 files changed, 0 insertions, 425 deletions
diff --git a/ffmpeg/libavcodec/a64multienc.c b/ffmpeg/libavcodec/a64multienc.c
deleted file mode 100644
index 6dd5c2c..0000000
--- a/ffmpeg/libavcodec/a64multienc.c
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@@ -1,425 +0,0 @@
-/*
- * a64 video encoder - multicolor modes
- * Copyright (c) 2009 Tobias Bindhammer
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * a64 video encoder - multicolor modes
- */
-
-#include "a64colors.h"
-#include "a64tables.h"
-#include "elbg.h"
-#include "internal.h"
-#include "libavutil/common.h"
-#include "libavutil/intreadwrite.h"
-
-#define DITHERSTEPS 8
-#define CHARSET_CHARS 256
-#define INTERLACED 1
-#define CROP_SCREENS 1
-
-#define C64XRES 320
-#define C64YRES 200
-
-typedef struct A64Context {
- /* variables for multicolor modes */
- AVLFG randctx;
- int mc_lifetime;
- int mc_use_5col;
- unsigned mc_frame_counter;
- int *mc_meta_charset;
- int *mc_charmap;
- int *mc_best_cb;
- int mc_luma_vals[5];
- uint8_t *mc_charset;
- uint8_t *mc_colram;
- uint8_t *mc_palette;
- int mc_pal_size;
-
- /* pts of the next packet that will be output */
- int64_t next_pts;
-} A64Context;
-
-/* gray gradient */
-static const int mc_colors[5]={0x0,0xb,0xc,0xf,0x1};
-
-/* other possible gradients - to be tested */
-//static const int mc_colors[5]={0x0,0x8,0xa,0xf,0x7};
-//static const int mc_colors[5]={0x0,0x9,0x8,0xa,0x3};
-
-static void to_meta_with_crop(AVCodecContext *avctx, AVFrame *p, int *dest)
-{
- int blockx, blocky, x, y;
- int luma = 0;
- int height = FFMIN(avctx->height, C64YRES);
- int width = FFMIN(avctx->width , C64XRES);
- uint8_t *src = p->data[0];
-
- for (blocky = 0; blocky < C64YRES; blocky += 8) {
- for (blockx = 0; blockx < C64XRES; blockx += 8) {
- for (y = blocky; y < blocky + 8 && y < C64YRES; y++) {
- for (x = blockx; x < blockx + 8 && x < C64XRES; x += 2) {
- if(x < width && y < height) {
- /* build average over 2 pixels */
- luma = (src[(x + 0 + y * p->linesize[0])] +
- src[(x + 1 + y * p->linesize[0])]) / 2;
- /* write blocks as linear data now so they are suitable for elbg */
- dest[0] = luma;
- }
- dest++;
- }
- }
- }
- }
-}
-
-static void render_charset(AVCodecContext *avctx, uint8_t *charset,
- uint8_t *colrammap)
-{
- A64Context *c = avctx->priv_data;
- uint8_t row1, row2;
- int charpos, x, y;
- int a, b;
- uint8_t pix;
- int lowdiff, highdiff;
- int *best_cb = c->mc_best_cb;
- static uint8_t index1[256];
- static uint8_t index2[256];
- static uint8_t dither[256];
- int i;
- int distance;
-
- /* generate lookup-tables for dither and index before looping */
- i = 0;
- for (a=0; a < 256; a++) {
- if(i < c->mc_pal_size -1 && a == c->mc_luma_vals[i + 1]) {
- distance = c->mc_luma_vals[i + 1] - c->mc_luma_vals[i];
- for(b = 0; b <= distance; b++) {
- dither[c->mc_luma_vals[i] + b] = b * (DITHERSTEPS - 1) / distance;
- }
- i++;
- }
- if(i >= c->mc_pal_size - 1) dither[a] = 0;
- index1[a] = i;
- index2[a] = FFMIN(i + 1, c->mc_pal_size - 1);
- }
-
- /* and render charset */
- for (charpos = 0; charpos < CHARSET_CHARS; charpos++) {
- lowdiff = 0;
- highdiff = 0;
- for (y = 0; y < 8; y++) {
- row1 = 0; row2 = 0;
- for (x = 0; x < 4; x++) {
- pix = best_cb[y * 4 + x];
-
- /* accumulate error for brightest/darkest color */
- if (index1[pix] >= 3)
- highdiff += pix - c->mc_luma_vals[3];
- if (index1[pix] < 1)
- lowdiff += c->mc_luma_vals[1] - pix;
-
- row1 <<= 2;
-
- if (INTERLACED) {
- row2 <<= 2;
- if (interlaced_dither_patterns[dither[pix]][(y & 3) * 2 + 0][x & 3])
- row1 |= 3-(index2[pix] & 3);
- else
- row1 |= 3-(index1[pix] & 3);
-
- if (interlaced_dither_patterns[dither[pix]][(y & 3) * 2 + 1][x & 3])
- row2 |= 3-(index2[pix] & 3);
- else
- row2 |= 3-(index1[pix] & 3);
- }
- else {
- if (multi_dither_patterns[dither[pix]][(y & 3)][x & 3])
- row1 |= 3-(index2[pix] & 3);
- else
- row1 |= 3-(index1[pix] & 3);
- }
- }
- charset[y+0x000] = row1;
- if (INTERLACED) charset[y+0x800] = row2;
- }
- /* do we need to adjust pixels? */
- if (highdiff > 0 && lowdiff > 0 && c->mc_use_5col) {
- if (lowdiff > highdiff) {
- for (x = 0; x < 32; x++)
- best_cb[x] = FFMIN(c->mc_luma_vals[3], best_cb[x]);
- } else {
- for (x = 0; x < 32; x++)
- best_cb[x] = FFMAX(c->mc_luma_vals[1], best_cb[x]);
- }
- charpos--; /* redo now adjusted char */
- /* no adjustment needed, all fine */
- } else {
- /* advance pointers */
- best_cb += 32;
- charset += 8;
-
- /* remember colorram value */
- colrammap[charpos] = (highdiff > 0);
- }
- }
-}
-
-static av_cold int a64multi_close_encoder(AVCodecContext *avctx)
-{
- A64Context *c = avctx->priv_data;
- av_frame_free(&avctx->coded_frame);
- av_free(c->mc_meta_charset);
- av_free(c->mc_best_cb);
- av_free(c->mc_charset);
- av_free(c->mc_charmap);
- av_free(c->mc_colram);
- return 0;
-}
-
-static av_cold int a64multi_init_encoder(AVCodecContext *avctx)
-{
- A64Context *c = avctx->priv_data;
- int a;
- av_lfg_init(&c->randctx, 1);
-
- if (avctx->global_quality < 1) {
- c->mc_lifetime = 4;
- } else {
- c->mc_lifetime = avctx->global_quality /= FF_QP2LAMBDA;
- }
-
- av_log(avctx, AV_LOG_INFO, "charset lifetime set to %d frame(s)\n", c->mc_lifetime);
-
- c->mc_frame_counter = 0;
- c->mc_use_5col = avctx->codec->id == AV_CODEC_ID_A64_MULTI5;
- c->mc_pal_size = 4 + c->mc_use_5col;
-
- /* precalc luma values for later use */
- for (a = 0; a < c->mc_pal_size; a++) {
- c->mc_luma_vals[a]=a64_palette[mc_colors[a]][0] * 0.30 +
- a64_palette[mc_colors[a]][1] * 0.59 +
- a64_palette[mc_colors[a]][2] * 0.11;
- }
-
- if (!(c->mc_meta_charset = av_malloc(32000 * c->mc_lifetime * sizeof(int))) ||
- !(c->mc_best_cb = av_malloc(CHARSET_CHARS * 32 * sizeof(int))) ||
- !(c->mc_charmap = av_mallocz(1000 * c->mc_lifetime * sizeof(int))) ||
- !(c->mc_colram = av_mallocz(CHARSET_CHARS * sizeof(uint8_t))) ||
- !(c->mc_charset = av_malloc(0x800 * (INTERLACED+1) * sizeof(uint8_t)))) {
- av_log(avctx, AV_LOG_ERROR, "Failed to allocate buffer memory.\n");
- return AVERROR(ENOMEM);
- }
-
- /* set up extradata */
- if (!(avctx->extradata = av_mallocz(8 * 4 + FF_INPUT_BUFFER_PADDING_SIZE))) {
- av_log(avctx, AV_LOG_ERROR, "Failed to allocate memory for extradata.\n");
- return AVERROR(ENOMEM);
- }
- avctx->extradata_size = 8 * 4;
- AV_WB32(avctx->extradata, c->mc_lifetime);
- AV_WB32(avctx->extradata + 16, INTERLACED);
-
- avctx->coded_frame = av_frame_alloc();
- if (!avctx->coded_frame) {
- a64multi_close_encoder(avctx);
- return AVERROR(ENOMEM);
- }
-
- avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
- avctx->coded_frame->key_frame = 1;
- if (!avctx->codec_tag)
- avctx->codec_tag = AV_RL32("a64m");
-
- c->next_pts = AV_NOPTS_VALUE;
-
- return 0;
-}
-
-static void a64_compress_colram(unsigned char *buf, int *charmap, uint8_t *colram)
-{
- int a;
- uint8_t temp;
- /* only needs to be done in 5col mode */
- /* XXX could be squeezed to 0x80 bytes */
- for (a = 0; a < 256; a++) {
- temp = colram[charmap[a + 0x000]] << 0;
- temp |= colram[charmap[a + 0x100]] << 1;
- temp |= colram[charmap[a + 0x200]] << 2;
- if (a < 0xe8) temp |= colram[charmap[a + 0x300]] << 3;
- buf[a] = temp << 2;
- }
-}
-
-static int a64multi_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
- const AVFrame *pict, int *got_packet)
-{
- A64Context *c = avctx->priv_data;
- AVFrame *const p = avctx->coded_frame;
-
- int frame;
- int x, y;
- int b_height;
- int b_width;
-
- int req_size, ret;
- uint8_t *buf = NULL;
-
- int *charmap = c->mc_charmap;
- uint8_t *colram = c->mc_colram;
- uint8_t *charset = c->mc_charset;
- int *meta = c->mc_meta_charset;
- int *best_cb = c->mc_best_cb;
-
- int charset_size = 0x800 * (INTERLACED + 1);
- int colram_size = 0x100 * c->mc_use_5col;
- int screen_size;
-
- if(CROP_SCREENS) {
- b_height = FFMIN(avctx->height,C64YRES) >> 3;
- b_width = FFMIN(avctx->width ,C64XRES) >> 3;
- screen_size = b_width * b_height;
- } else {
- b_height = C64YRES >> 3;
- b_width = C64XRES >> 3;
- screen_size = 0x400;
- }
-
- /* no data, means end encoding asap */
- if (!pict) {
- /* all done, end encoding */
- if (!c->mc_lifetime) return 0;
- /* no more frames in queue, prepare to flush remaining frames */
- if (!c->mc_frame_counter) {
- c->mc_lifetime = 0;
- }
- /* still frames in queue so limit lifetime to remaining frames */
- else c->mc_lifetime = c->mc_frame_counter;
- /* still new data available */
- } else {
- /* fill up mc_meta_charset with data until lifetime exceeds */
- if (c->mc_frame_counter < c->mc_lifetime) {
- *p = *pict;
- p->pict_type = AV_PICTURE_TYPE_I;
- p->key_frame = 1;
- to_meta_with_crop(avctx, p, meta + 32000 * c->mc_frame_counter);
- c->mc_frame_counter++;
- if (c->next_pts == AV_NOPTS_VALUE)
- c->next_pts = pict->pts;
- /* lifetime is not reached so wait for next frame first */
- return 0;
- }
- }
-
- /* lifetime reached so now convert X frames at once */
- if (c->mc_frame_counter == c->mc_lifetime) {
- req_size = 0;
- /* any frames to encode? */
- if (c->mc_lifetime) {
- req_size = charset_size + c->mc_lifetime*(screen_size + colram_size);
- if ((ret = ff_alloc_packet2(avctx, pkt, req_size)) < 0)
- return ret;
- buf = pkt->data;
-
- /* calc optimal new charset + charmaps */
- avpriv_init_elbg(meta, 32, 1000 * c->mc_lifetime, best_cb, CHARSET_CHARS, 50, charmap, &c->randctx);
- avpriv_do_elbg (meta, 32, 1000 * c->mc_lifetime, best_cb, CHARSET_CHARS, 50, charmap, &c->randctx);
-
- /* create colorram map and a c64 readable charset */
- render_charset(avctx, charset, colram);
-
- /* copy charset to buf */
- memcpy(buf, charset, charset_size);
-
- /* advance pointers */
- buf += charset_size;
- charset += charset_size;
- }
-
- /* write x frames to buf */
- for (frame = 0; frame < c->mc_lifetime; frame++) {
- /* copy charmap to buf. buf is uchar*, charmap is int*, so no memcpy here, sorry */
- for (y = 0; y < b_height; y++) {
- for (x = 0; x < b_width; x++) {
- buf[y * b_width + x] = charmap[y * b_width + x];
- }
- }
- /* advance pointers */
- buf += screen_size;
- req_size += screen_size;
-
- /* compress and copy colram to buf */
- if (c->mc_use_5col) {
- a64_compress_colram(buf, charmap, colram);
- /* advance pointers */
- buf += colram_size;
- req_size += colram_size;
- }
-
- /* advance to next charmap */
- charmap += 1000;
- }
-
- AV_WB32(avctx->extradata + 4, c->mc_frame_counter);
- AV_WB32(avctx->extradata + 8, charset_size);
- AV_WB32(avctx->extradata + 12, screen_size + colram_size);
-
- /* reset counter */
- c->mc_frame_counter = 0;
-
- pkt->pts = pkt->dts = c->next_pts;
- c->next_pts = AV_NOPTS_VALUE;
-
- pkt->size = req_size;
- pkt->flags |= AV_PKT_FLAG_KEY;
- *got_packet = !!req_size;
- }
- return 0;
-}
-
-#if CONFIG_A64MULTI_ENCODER
-AVCodec ff_a64multi_encoder = {
- .name = "a64multi",
- .long_name = NULL_IF_CONFIG_SMALL("Multicolor charset for Commodore 64"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_A64_MULTI,
- .priv_data_size = sizeof(A64Context),
- .init = a64multi_init_encoder,
- .encode2 = a64multi_encode_frame,
- .close = a64multi_close_encoder,
- .pix_fmts = (const enum AVPixelFormat[]) {AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE},
- .capabilities = CODEC_CAP_DELAY,
-};
-#endif
-#if CONFIG_A64MULTI5_ENCODER
-AVCodec ff_a64multi5_encoder = {
- .name = "a64multi5",
- .long_name = NULL_IF_CONFIG_SMALL("Multicolor charset for Commodore 64, extended with 5th color (colram)"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_A64_MULTI5,
- .priv_data_size = sizeof(A64Context),
- .init = a64multi_init_encoder,
- .encode2 = a64multi_encode_frame,
- .close = a64multi_close_encoder,
- .pix_fmts = (const enum AVPixelFormat[]) {AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE},
- .capabilities = CODEC_CAP_DELAY,
-};
-#endif
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