* a64 video encoder - multicolor modes
* Copyright (c) 2009 Tobias Bindhammer
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#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
/* gray gradient */
static const int mc_colors[5]={0x0,0xb,0xc,0xf,0x1};
-static void to_meta_with_crop(AVCodecContext *avctx, AVFrame *p, int *dest)
+/* 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,
+ const AVFrame *p, int *dest)
{
int blockx, blocky, x, y;
int luma = 0;
- int height = FFMIN(avctx->height,C64YRES);
- int width = FFMIN(avctx->width ,C64XRES);
+ int height = FFMIN(avctx->height, C64YRES);
+ int width = FFMIN(avctx->width , C64XRES);
uint8_t *src = p->data[0];
- for (blocky = 0; blocky < height; blocky += 8) {
+ for (blocky = 0; blocky < C64YRES; blocky += 8) {
for (blockx = 0; blockx < C64XRES; blockx += 8) {
- for (y = blocky; y < blocky+8 && y < height; y++) {
- for (x = blockx; x < blockx+8 && x < C64XRES; x += 2) {
- if(x < width) {
+ 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;
uint8_t *colrammap)
{
A64Context *c = avctx->priv_data;
- uint8_t row1;
+ uint8_t row1, row2;
int charpos, x, y;
int a, b;
uint8_t pix;
/* generate lookup-tables for dither and index before looping */
i = 0;
for (a=0; a < 256; a++) {
- if(i < 4 && a == c->mc_luma_vals[i+1]) {
- distance = c->mc_luma_vals[i+1] - c->mc_luma_vals[i];
+ 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;
+ dither[c->mc_luma_vals[i] + b] = b * (DITHERSTEPS - 1) / distance;
}
i++;
}
- if(i >=4 ) dither[a] = 0;
+ if(i >= c->mc_pal_size - 1) dither[a] = 0;
index1[a] = i;
- index2[a] = FFMIN(i+1, 4);
+ 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;
+ row1 = 0; row2 = 0;
for (x = 0; x < 4; x++) {
pix = best_cb[y * 4 + x];
row1 <<= 2;
- if (multi_dither_patterns[dither[pix]][(y & 3)][x & 3])
- row1 |= 3-(index2[pix] & 3);
- else
- row1 |= 3-(index1[pix] & 3);
+ 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) {
+ 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]);
charset += 8;
/* remember colorram value */
- colrammap[charpos] = (highdiff > 0) + 8;
+ colrammap[charpos] = (highdiff > 0);
}
}
}
A64Context *c = avctx->priv_data;
av_free(c->mc_meta_charset);
av_free(c->mc_best_cb);
- av_free(c->mc_charmap);
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)
+static av_cold int a64multi_encode_init(AVCodecContext *avctx)
{
A64Context *c = avctx->priv_data;
int a;
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 < 5; a++) {
+ 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;
}
- c->mc_frame_counter = 0;
- c->mc_use_5col = avctx->codec->id == CODEC_ID_A64_MULTI5;
- 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_malloc(1000 * c->mc_lifetime * sizeof(int));
- c->mc_charset = av_malloc(0x800 * sizeof(uint8_t));
-
- avcodec_get_frame_defaults(&c->picture);
- avctx->coded_frame = &c->picture;
- avctx->coded_frame->pict_type = FF_I_TYPE;
+ 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 + AV_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);
+
+#if FF_API_CODED_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+ avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
avctx->coded_frame->key_frame = 1;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
if (!avctx->codec_tag)
avctx->codec_tag = AV_RL32("a64m");
+ c->next_pts = AV_NOPTS_VALUE;
+
return 0;
}
-static int a64multi_encode_frame(AVCodecContext *avctx, unsigned char *buf,
- int buf_size, void *data)
+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 *pict = data;
- AVFrame *const p = (AVFrame *) & c->picture;
int frame;
- int a;
+ int x, y;
+ int b_height;
+ int b_width;
- uint8_t colrammap[256];
- int *charmap = c->mc_charmap;
- int *meta = c->mc_meta_charset;
- int *best_cb = c->mc_best_cb;
- int frm_size = 0x400 + 0x400 * c->mc_use_5col;
- int req_size;
+ int req_size, ret;
+ uint8_t *buf;
- /* it is the last frame so prepare to flush */
- if (!data)
- c->mc_lifetime = c->mc_frame_counter;
+ 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;
- req_size = 0x800 + frm_size * c->mc_lifetime;
+ int charset_size = 0x800 * (INTERLACED + 1);
+ int colram_size = 0x100 * c->mc_use_5col;
+ int screen_size;
- if (req_size > buf_size) {
- av_log(avctx, AV_LOG_ERROR, "buf size too small (need %d, got %d)\n", req_size, buf_size);
- return AVERROR(EINVAL);
+ 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;
}
- /* fill up mc_meta_charset with framedata until lifetime exceeds */
- if (c->mc_frame_counter < c->mc_lifetime) {
- *p = *pict;
- p->pict_type = FF_I_TYPE;
- p->key_frame = 1;
- to_meta_with_crop(avctx, p, meta + 32000 * c->mc_frame_counter);
- c->mc_frame_counter++;
- /* lifetime is not reached */
- return 0;
+
+ /* 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) {
+#if FF_API_CODED_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+ avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+ avctx->coded_frame->key_frame = 1;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+ to_meta_with_crop(avctx, pict, 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 exceeded so now convert X frames at once */
- if (c->mc_frame_counter == c->mc_lifetime && c->mc_lifetime > 0) {
- c->mc_frame_counter = 0;
- ff_init_elbg(meta, 32, 1000 * c-> mc_lifetime, best_cb, CHARSET_CHARS, 5, charmap, &c->randctx);
- ff_do_elbg (meta, 32, 1000 * c-> mc_lifetime, best_cb, CHARSET_CHARS, 5, charmap, &c->randctx);
- render_charset(avctx, buf, colrammap);
+ /* 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_packet(pkt, req_size)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", req_size);
+ return ret;
+ }
+ buf = pkt->data;
+
+ /* calc optimal new charset + charmaps */
+ ret = ff_init_elbg(meta, 32, 1000 * c->mc_lifetime, best_cb,
+ CHARSET_CHARS, 50, charmap, &c->randctx);
+ if (ret < 0)
+ return ret;
+ ret = ff_do_elbg(meta, 32, 1000 * c->mc_lifetime, best_cb,
+ CHARSET_CHARS, 50, charmap, &c->randctx);
+ if (ret < 0)
+ return ret;
+
+ /* 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++) {
- for (a = 0; a < 1000; a++) {
- buf[0x800 + a] = charmap[a];
- if (c->mc_use_5col) buf[0xc00 + a] = colrammap[charmap[a]];
+ /* 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;
}
- buf += frm_size;
+
+ /* advance to next charmap */
charmap += 1000;
}
- return req_size;
+
+ 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;
}
-AVCodec a64multi_encoder = {
+AVCodec ff_a64multi_encoder = {
.name = "a64multi",
+ .long_name = NULL_IF_CONFIG_SMALL("Multicolor charset for Commodore 64"),
.type = AVMEDIA_TYPE_VIDEO,
- .id = CODEC_ID_A64_MULTI,
+ .id = AV_CODEC_ID_A64_MULTI,
.priv_data_size = sizeof(A64Context),
- .init = a64multi_init_encoder,
- .encode = a64multi_encode_frame,
+ .init = a64multi_encode_init,
+ .encode2 = a64multi_encode_frame,
.close = a64multi_close_encoder,
- .pix_fmts = (enum PixelFormat[]) {PIX_FMT_GRAY8, PIX_FMT_NONE},
- .long_name = NULL_IF_CONFIG_SMALL("Multicolor charset for Commodore 64"),
- .capabilities = CODEC_CAP_DELAY,
+ .pix_fmts = (const enum AVPixelFormat[]) {AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE},
+ .capabilities = AV_CODEC_CAP_DELAY,
};
-AVCodec 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 = CODEC_ID_A64_MULTI5,
+ .id = AV_CODEC_ID_A64_MULTI5,
.priv_data_size = sizeof(A64Context),
- .init = a64multi_init_encoder,
- .encode = a64multi_encode_frame,
+ .init = a64multi_encode_init,
+ .encode2 = a64multi_encode_frame,
.close = a64multi_close_encoder,
- .pix_fmts = (enum PixelFormat[]) {PIX_FMT_GRAY8, PIX_FMT_NONE},
- .long_name = NULL_IF_CONFIG_SMALL("Multicolor charset for Commodore 64, extended with 5th color (colram)"),
- .capabilities = CODEC_CAP_DELAY,
+ .pix_fmts = (const enum AVPixelFormat[]) {AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE},
+ .capabilities = AV_CODEC_CAP_DELAY,
};
projects / ffmpeg / blobdiff