/*
- * DVD subtitle decoding for ffmpeg
+ * DVD subtitle decoding
* Copyright (c) 2005 Fabrice Bellard
*
* This file is part of Libav.
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
#include "avcodec.h"
#include "get_bits.h"
-#include "dsputil.h"
+#include "internal.h"
+
+#include "libavutil/attributes.h"
#include "libavutil/colorspace.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/avstring.h"
-//#define DEBUG
+typedef struct DVDSubContext {
+ uint32_t palette[16];
+ int has_palette;
+} DVDSubContext;
static void yuv_a_to_rgba(const uint8_t *ycbcr, const uint8_t *alpha, uint32_t *rgba, int num_values)
{
- uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+ const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
uint8_t r, g, b;
int i, y, cb, cr;
int r_add, g_add, b_add;
return 0;
}
-static void guess_palette(uint32_t *rgba_palette,
+static void guess_palette(DVDSubContext* ctx,
+ uint32_t *rgba_palette,
uint8_t *colormap,
uint8_t *alpha,
uint32_t subtitle_color)
{
- uint8_t color_used[16];
+ uint8_t color_used[16] = { 0 };
int nb_opaque_colors, i, level, j, r, g, b;
+ if (ctx->has_palette) {
+ for (i = 0; i < 4; i++)
+ rgba_palette[i] = (ctx->palette[colormap[i]] & 0x00ffffff)
+ | ((alpha[i] * 17) << 24);
+ return;
+ }
+
for(i = 0; i < 4; i++)
rgba_palette[i] = 0;
- memset(color_used, 0, 16);
nb_opaque_colors = 0;
for(i = 0; i < 4; i++) {
if (alpha[i] != 0 && !color_used[colormap[i]]) {
#define READ_OFFSET(a) (big_offsets ? AV_RB32(a) : AV_RB16(a))
-static int decode_dvd_subtitles(AVSubtitle *sub_header,
+static int decode_dvd_subtitles(DVDSubContext *ctx, AVSubtitle *sub_header,
const uint8_t *buf, int buf_size)
{
int cmd_pos, pos, cmd, x1, y1, x2, y2, offset1, offset2, next_cmd_pos;
int big_offsets, offset_size, is_8bit = 0;
const uint8_t *yuv_palette = 0;
- uint8_t colormap[4], alpha[256];
+ uint8_t colormap[4] = { 0 }, alpha[256] = { 0 };
int date;
int i;
int is_menu = 0;
if (h < 0)
h = 0;
if (w > 0 && h > 0) {
- if (sub_header->rects != NULL) {
+ if (sub_header->rects) {
for (i = 0; i < sub_header->num_rects; i++) {
av_freep(&sub_header->rects[i]->pict.data[0]);
av_freep(&sub_header->rects[i]->pict.data[1]);
yuv_a_to_rgba(yuv_palette, alpha, (uint32_t*)sub_header->rects[0]->pict.data[1], 256);
} else {
sub_header->rects[0]->nb_colors = 4;
- guess_palette((uint32_t*)sub_header->rects[0]->pict.data[1],
+ guess_palette(ctx,
+ (uint32_t*)sub_header->rects[0]->pict.data[1],
colormap, alpha, 0xffff00);
}
sub_header->rects[0]->x = x1;
if (sub_header->num_rects > 0)
return is_menu;
fail:
- if (sub_header->rects != NULL) {
+ if (!sub_header->rects) {
for (i = 0; i < sub_header->num_rects; i++) {
av_freep(&sub_header->rects[i]->pict.data[0]);
av_freep(&sub_header->rects[i]->pict.data[1]);
/* return 0 if empty rectangle, 1 if non empty */
static int find_smallest_bounding_rectangle(AVSubtitle *s)
{
- uint8_t transp_color[256];
+ uint8_t transp_color[256] = { 0 };
int y1, y2, x1, x2, y, w, h, i;
uint8_t *bitmap;
- if (s->num_rects == 0 || s->rects == NULL || s->rects[0]->w <= 0 || s->rects[0]->h <= 0)
+ if (s->num_rects == 0 || !s->rects || s->rects[0]->w <= 0 || s->rects[0]->h <= 0)
return 0;
- memset(transp_color, 0, 256);
for(i = 0; i < s->rects[0]->nb_colors; i++) {
if ((((uint32_t*)s->rects[0]->pict.data[1])[i] >> 24) == 0)
transp_color[i] = 1;
}
#ifdef DEBUG
-#undef fprintf
-#undef perror
-#undef exit
static void ppm_save(const char *filename, uint8_t *bitmap, int w, int h,
uint32_t *rgba_palette)
{
void *data, int *data_size,
AVPacket *avpkt)
{
+ DVDSubContext *ctx = avctx->priv_data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
AVSubtitle *sub = data;
int is_menu;
- is_menu = decode_dvd_subtitles(sub, buf, buf_size);
+ is_menu = decode_dvd_subtitles(ctx, sub, buf, buf_size);
if (is_menu < 0) {
no_subtitle:
return buf_size;
}
+static av_cold int dvdsub_init(AVCodecContext *avctx)
+{
+ DVDSubContext *ctx = avctx->priv_data;
+ char *data, *cur;
+
+ if (!avctx->extradata || !avctx->extradata_size)
+ return 0;
+
+ data = av_malloc(avctx->extradata_size + 1);
+ if (!data)
+ return AVERROR(ENOMEM);
+ memcpy(data, avctx->extradata, avctx->extradata_size);
+ data[avctx->extradata_size] = '\0';
+ cur = data;
+
+ while (*cur) {
+ if (strncmp("palette:", cur, 8) == 0) {
+ int i;
+ char *p = cur + 8;
+ ctx->has_palette = 1;
+ for (i = 0; i < 16; i++) {
+ ctx->palette[i] = strtoul(p, &p, 16);
+ while (*p == ',' || av_isspace(*p))
+ p++;
+ }
+ } else if (!strncmp("size:", cur, 5)) {
+ int w, h;
+ if (sscanf(cur + 5, "%dx%d", &w, &h) == 2) {
+ int ret = ff_set_dimensions(avctx, w, h);
+ if (ret < 0)
+ return ret;
+ }
+ }
+ cur += strcspn(cur, "\n\r");
+ cur += strspn(cur, "\n\r");
+ }
+ av_free(data);
+ return 0;
+}
+
AVCodec ff_dvdsub_decoder = {
.name = "dvdsub",
+ .long_name = NULL_IF_CONFIG_SMALL("DVD subtitles"),
.type = AVMEDIA_TYPE_SUBTITLE,
- .id = CODEC_ID_DVD_SUBTITLE,
+ .id = AV_CODEC_ID_DVD_SUBTITLE,
+ .priv_data_size = sizeof(DVDSubContext),
+ .init = dvdsub_init,
.decode = dvdsub_decode,
- .long_name = NULL_IF_CONFIG_SMALL("DVD subtitles"),
};
projects / ffmpeg / blobdiff