fate: use TARGET_SAMPLES in mcdeint tests
[ffmpeg.git] / libavcodec / dvdsubdec.c
index b351e15..38af768 100644 (file)
@@ -1,6 +1,6 @@
 /*
- * DVD subtitle decoding for ffmpeg
- * Copyright (c) 2005 Fabrice Bellard.
+ * DVD subtitle decoding
+ * Copyright (c) 2005 Fabrice Bellard
  *
  * This file is part of FFmpeg.
  *
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avcodec.h"
-#include "bitstream.h"
-#include "colorspace.h"
+#include "get_bits.h"
 #include "dsputil.h"
+#include "libavutil/attributes.h"
+#include "libavutil/colorspace.h"
+#include "libavutil/opt.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/avstring.h"
 
-//#define DEBUG
+typedef struct DVDSubContext
+{
+  AVClass *class;
+  uint32_t palette[16];
+  char    *palette_str;
+  int      has_palette;
+  uint8_t  colormap[4];
+  uint8_t  alpha[256];
+} 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_cropTbl + MAX_NEG_CROP;
     uint8_t r, g, b;
     int i, y, cb, cr;
     int r_add, g_add, b_add;
 
     for (i = num_values; i > 0; i--) {
         y = *ycbcr++;
-        cb = *ycbcr++;
         cr = *ycbcr++;
+        cb = *ycbcr++;
         YUV_TO_RGB1_CCIR(cb, cr);
         YUV_TO_RGB2_CCIR(r, g, b, y);
         *rgba++ = (*alpha++ << 24) | (r << 16) | (g << 8) | b;
     }
 }
 
-static int dvdsub_init_decoder(AVCodecContext *avctx)
-{
-    return 0;
-}
-
 static int decode_run_2bit(GetBitContext *gb, int *color)
 {
     unsigned int v, t;
@@ -120,18 +127,32 @@ static int decode_rle(uint8_t *bitmap, int linesize, int w, int h,
     return 0;
 }
 
-static void guess_palette(uint32_t *rgba_palette,
-                          uint8_t *colormap,
-                          uint8_t *alpha,
+static void guess_palette(DVDSubContext* ctx,
+                          uint32_t *rgba_palette,
                           uint32_t subtitle_color)
 {
-    uint8_t color_used[16];
+    static const uint8_t level_map[4][4] = {
+        // this configuration (full range, lowest to highest) in tests
+        // seemed most common, so assume this
+        {0xff},
+        {0x00, 0xff},
+        {0x00, 0x80, 0xff},
+        {0x00, 0x55, 0xaa, 0xff},
+    };
+    uint8_t color_used[16] = { 0 };
     int nb_opaque_colors, i, level, j, r, g, b;
+    uint8_t *colormap = ctx->colormap, *alpha = ctx->alpha;
+
+    if(ctx->has_palette) {
+        for(i = 0; i < 4; i++)
+            rgba_palette[i] = (ctx->palette[colormap[i]] & 0x00ffffff)
+                              | ((alpha[i] * 17U) << 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]]) {
@@ -143,18 +164,18 @@ static void guess_palette(uint32_t *rgba_palette,
     if (nb_opaque_colors == 0)
         return;
 
-    j = nb_opaque_colors;
+    j = 0;
     memset(color_used, 0, 16);
     for(i = 0; i < 4; i++) {
         if (alpha[i] != 0) {
             if (!color_used[colormap[i]])  {
-                level = (0xff * j) / nb_opaque_colors;
+                level = level_map[nb_opaque_colors][j];
                 r = (((subtitle_color >> 16) & 0xff) * level) >> 8;
                 g = (((subtitle_color >> 8) & 0xff) * level) >> 8;
                 b = (((subtitle_color >> 0) & 0xff) * level) >> 8;
                 rgba_palette[i] = b | (g << 8) | (r << 16) | ((alpha[i] * 17) << 24);
                 color_used[colormap[i]] = (i + 1);
-                j--;
+                j++;
             } else {
                 rgba_palette[i] = (rgba_palette[color_used[colormap[i]] - 1] & 0x00ffffff) |
                                     ((alpha[i] * 17) << 24);
@@ -165,23 +186,19 @@ static void guess_palette(uint32_t *rgba_palette,
 
 #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 = ctx->colormap, *alpha = ctx->alpha;
     int date;
     int i;
     int is_menu = 0;
 
     if (buf_size < 10)
         return -1;
-    sub_header->rects = NULL;
-    sub_header->num_rects = 0;
-    sub_header->start_display_time = 0;
-    sub_header->end_display_time = 0;
 
     if (AV_RB16(buf) == 0) {   /* HD subpicture with 4-byte offsets */
         big_offsets = 1;
@@ -195,22 +212,18 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
 
     cmd_pos = READ_OFFSET(buf + cmd_pos);
 
-    while ((cmd_pos + 2 + offset_size) < buf_size) {
+    while (cmd_pos > 0 && cmd_pos < buf_size - 2 - offset_size) {
         date = AV_RB16(buf + cmd_pos);
         next_cmd_pos = READ_OFFSET(buf + cmd_pos + 2);
-#ifdef DEBUG
-        av_log(NULL, AV_LOG_INFO, "cmd_pos=0x%04x next=0x%04x date=%d\n",
-               cmd_pos, next_cmd_pos, date);
-#endif
+        av_dlog(NULL, "cmd_pos=0x%04x next=0x%04x date=%d\n",
+                cmd_pos, next_cmd_pos, date);
         pos = cmd_pos + 2 + offset_size;
         offset1 = -1;
         offset2 = -1;
         x1 = y1 = x2 = y2 = 0;
         while (pos < buf_size) {
             cmd = buf[pos++];
-#ifdef DEBUG
-            av_log(NULL, AV_LOG_INFO, "cmd=%02x\n", cmd);
-#endif
+            av_dlog(NULL, "cmd=%02x\n", cmd);
             switch(cmd) {
             case 0x00:
                 /* menu subpicture */
@@ -243,9 +256,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
                 alpha[1] = buf[pos + 1] >> 4;
                 alpha[0] = buf[pos + 1] & 0x0f;
                 pos += 2;
-#ifdef DEBUG
-            av_log(NULL, AV_LOG_INFO, "alpha=%x%x%x%x\n", alpha[0],alpha[1],alpha[2],alpha[3]);
-#endif
+            av_dlog(NULL, "alpha=%x%x%x%x\n", alpha[0],alpha[1],alpha[2],alpha[3]);
                 break;
             case 0x05:
             case 0x85:
@@ -257,10 +268,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
                 y2 = ((buf[pos + 4] & 0x0f) << 8) | buf[pos + 5];
                 if (cmd & 0x80)
                     is_8bit = 1;
-#ifdef DEBUG
-                av_log(NULL, AV_LOG_INFO, "x1=%d x2=%d y1=%d y2=%d\n",
-                       x1, x2, y1, y2);
-#endif
+                av_dlog(NULL, "x1=%d x2=%d y1=%d y2=%d\n", x1, x2, y1, y2);
                 pos += 6;
                 break;
             case 0x06:
@@ -268,9 +276,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
                     goto fail;
                 offset1 = AV_RB16(buf + pos);
                 offset2 = AV_RB16(buf + pos + 2);
-#ifdef DEBUG
-                av_log(NULL, AV_LOG_INFO, "offset1=0x%04x offset2=0x%04x\n", offset1, offset2);
-#endif
+                av_dlog(NULL, "offset1=0x%04x offset2=0x%04x\n", offset1, offset2);
                 pos += 4;
                 break;
             case 0x86:
@@ -278,9 +284,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
                     goto fail;
                 offset1 = AV_RB32(buf + pos);
                 offset2 = AV_RB32(buf + pos + 4);
-#ifdef DEBUG
-                av_log(NULL, AV_LOG_INFO, "offset1=0x%04x offset2=0x%04x\n", offset1, offset2);
-#endif
+                av_dlog(NULL, "offset1=0x%04x offset2=0x%04x\n", offset1, offset2);
                 pos += 8;
                 break;
 
@@ -303,9 +307,7 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
             case 0xff:
                 goto the_end;
             default:
-#ifdef DEBUG
-                av_log(NULL, AV_LOG_INFO, "unrecognised subpicture command 0x%x\n", cmd);
-#endif
+                av_dlog(NULL, "unrecognised subpicture command 0x%x\n", cmd);
                 goto the_end;
             }
         }
@@ -324,40 +326,47 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
             if (w > 0 && h > 0) {
                 if (sub_header->rects != NULL) {
                     for (i = 0; i < sub_header->num_rects; i++) {
-                        av_free(sub_header->rects[i].bitmap);
-                        av_free(sub_header->rects[i].rgba_palette);
+                        av_freep(&sub_header->rects[i]->pict.data[0]);
+                        av_freep(&sub_header->rects[i]->pict.data[1]);
+                        av_freep(&sub_header->rects[i]);
                     }
                     av_freep(&sub_header->rects);
                     sub_header->num_rects = 0;
                 }
 
                 bitmap = av_malloc(w * h);
-                sub_header->rects = av_mallocz(sizeof(AVSubtitleRect));
+                sub_header->rects = av_mallocz(sizeof(*sub_header->rects));
+                sub_header->rects[0] = av_mallocz(sizeof(AVSubtitleRect));
                 sub_header->num_rects = 1;
-                sub_header->rects[0].bitmap = bitmap;
+                sub_header->rects[0]->pict.data[0] = bitmap;
                 decode_rle(bitmap, w * 2, w, (h + 1) / 2,
                            buf, offset1, buf_size, is_8bit);
                 decode_rle(bitmap + w, w * 2, w, h / 2,
                            buf, offset2, buf_size, is_8bit);
+                sub_header->rects[0]->pict.data[1] = av_mallocz(AVPALETTE_SIZE);
                 if (is_8bit) {
                     if (yuv_palette == 0)
                         goto fail;
-                    sub_header->rects[0].rgba_palette = av_malloc(256 * 4);
-                    sub_header->rects[0].nb_colors = 256;
-                    yuv_a_to_rgba(yuv_palette, alpha, sub_header->rects[0].rgba_palette, 256);
+                    sub_header->rects[0]->nb_colors = 256;
+                    yuv_a_to_rgba(yuv_palette, alpha, (uint32_t*)sub_header->rects[0]->pict.data[1], 256);
                 } else {
-                    sub_header->rects[0].rgba_palette = av_malloc(4 * 4);
-                    sub_header->rects[0].nb_colors = 4;
-                    guess_palette(sub_header->rects[0].rgba_palette,
-                                  colormap, alpha, 0xffff00);
+                    sub_header->rects[0]->nb_colors = 4;
+                    guess_palette(ctx, (uint32_t*)sub_header->rects[0]->pict.data[1],
+                                  0xffff00);
                 }
-                sub_header->rects[0].x = x1;
-                sub_header->rects[0].y = y1;
-                sub_header->rects[0].w = w;
-                sub_header->rects[0].h = h;
-                sub_header->rects[0].linesize = w;
+                sub_header->rects[0]->x = x1;
+                sub_header->rects[0]->y = y1;
+                sub_header->rects[0]->w = w;
+                sub_header->rects[0]->h = h;
+                sub_header->rects[0]->type = SUBTITLE_BITMAP;
+                sub_header->rects[0]->pict.linesize[0] = w;
+                sub_header->rects[0]->flags = is_menu ? AV_SUBTITLE_FLAG_FORCED : 0;
             }
         }
+        if (next_cmd_pos < cmd_pos) {
+            av_log(NULL, AV_LOG_ERROR, "Invalid command offset\n");
+            break;
+        }
         if (next_cmd_pos == cmd_pos)
             break;
         cmd_pos = next_cmd_pos;
@@ -367,8 +376,9 @@ static int decode_dvd_subtitles(AVSubtitle *sub_header,
  fail:
     if (sub_header->rects != NULL) {
         for (i = 0; i < sub_header->num_rects; i++) {
-            av_free(sub_header->rects[i].bitmap);
-            av_free(sub_header->rects[i].rgba_palette);
+            av_freep(&sub_header->rects[i]->pict.data[0]);
+            av_freep(&sub_header->rects[i]->pict.data[1]);
+            av_freep(&sub_header->rects[i]);
         }
         av_freep(&sub_header->rects);
         sub_header->num_rects = 0;
@@ -391,38 +401,37 @@ static int is_transp(const uint8_t *buf, int pitch, int n,
 /* 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 == NULL || 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 ((s->rects[0].rgba_palette[i] >> 24) == 0)
+    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;
     }
     y1 = 0;
-    while (y1 < s->rects[0].h && is_transp(s->rects[0].bitmap + y1 * s->rects[0].linesize,
-                                  1, s->rects[0].w, transp_color))
+    while (y1 < s->rects[0]->h && is_transp(s->rects[0]->pict.data[0] + y1 * s->rects[0]->pict.linesize[0],
+                                  1, s->rects[0]->w, transp_color))
         y1++;
-    if (y1 == s->rects[0].h) {
-        av_freep(&s->rects[0].bitmap);
-        s->rects[0].w = s->rects[0].h = 0;
+    if (y1 == s->rects[0]->h) {
+        av_freep(&s->rects[0]->pict.data[0]);
+        s->rects[0]->w = s->rects[0]->h = 0;
         return 0;
     }
 
-    y2 = s->rects[0].h - 1;
-    while (y2 > 0 && is_transp(s->rects[0].bitmap + y2 * s->rects[0].linesize, 1,
-                               s->rects[0].w, transp_color))
+    y2 = s->rects[0]->h - 1;
+    while (y2 > 0 && is_transp(s->rects[0]->pict.data[0] + y2 * s->rects[0]->pict.linesize[0], 1,
+                               s->rects[0]->w, transp_color))
         y2--;
     x1 = 0;
-    while (x1 < (s->rects[0].w - 1) && is_transp(s->rects[0].bitmap + x1, s->rects[0].linesize,
-                                        s->rects[0].h, transp_color))
+    while (x1 < (s->rects[0]->w - 1) && is_transp(s->rects[0]->pict.data[0] + x1, s->rects[0]->pict.linesize[0],
+                                        s->rects[0]->h, transp_color))
         x1++;
-    x2 = s->rects[0].w - 1;
-    while (x2 > 0 && is_transp(s->rects[0].bitmap + x2, s->rects[0].linesize, s->rects[0].h,
+    x2 = s->rects[0]->w - 1;
+    while (x2 > 0 && is_transp(s->rects[0]->pict.data[0] + x2, s->rects[0]->pict.linesize[0], s->rects[0]->h,
                                   transp_color))
         x2--;
     w = x2 - x1 + 1;
@@ -431,25 +440,22 @@ static int find_smallest_bounding_rectangle(AVSubtitle *s)
     if (!bitmap)
         return 1;
     for(y = 0; y < h; y++) {
-        memcpy(bitmap + w * y, s->rects[0].bitmap + x1 + (y1 + y) * s->rects[0].linesize, w);
+        memcpy(bitmap + w * y, s->rects[0]->pict.data[0] + x1 + (y1 + y) * s->rects[0]->pict.linesize[0], w);
     }
-    av_freep(&s->rects[0].bitmap);
-    s->rects[0].bitmap = bitmap;
-    s->rects[0].linesize = w;
-    s->rects[0].w = w;
-    s->rects[0].h = h;
-    s->rects[0].x += x1;
-    s->rects[0].y += y1;
+    av_freep(&s->rects[0]->pict.data[0]);
+    s->rects[0]->pict.data[0] = bitmap;
+    s->rects[0]->pict.linesize[0] = w;
+    s->rects[0]->w = w;
+    s->rects[0]->h = h;
+    s->rects[0]->x += x1;
+    s->rects[0]->y += y1;
     return 1;
 }
 
-static int dvdsub_close_decoder(AVCodecContext *avctx)
-{
-    return 0;
-}
-
 #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)
 {
@@ -479,12 +485,15 @@ static void ppm_save(const char *filename, uint8_t *bitmap, int w, int h,
 
 static int dvdsub_decode(AVCodecContext *avctx,
                          void *data, int *data_size,
-                         uint8_t *buf, int buf_size)
+                         AVPacket *avpkt)
 {
-    AVSubtitle *sub = (void *)data;
+    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:
@@ -496,24 +505,106 @@ static int dvdsub_decode(AVCodecContext *avctx,
         goto no_subtitle;
 
 #if defined(DEBUG)
-    av_log(NULL, AV_LOG_INFO, "start=%d ms end =%d ms\n",
-           sub->start_display_time,
-           sub->end_display_time);
-    ppm_save("/tmp/a.ppm", sub->rects[0].bitmap,
-             sub->rects[0].w, sub->rects[0].h, sub->rects[0].rgba_palette);
+    av_dlog(NULL, "start=%d ms end =%d ms\n",
+            sub->start_display_time,
+            sub->end_display_time);
+    ppm_save("/tmp/a.ppm", sub->rects[0]->pict.data[0],
+             sub->rects[0]->w, sub->rects[0]->h, sub->rects[0]->pict.data[1]);
 #endif
 
     *data_size = 1;
     return buf_size;
 }
 
-AVCodec dvdsub_decoder = {
-    "dvdsub",
-    CODEC_TYPE_SUBTITLE,
-    CODEC_ID_DVD_SUBTITLE,
-    0,
-    dvdsub_init_decoder,
-    NULL,
-    dvdsub_close_decoder,
-    dvdsub_decode,
+static void parse_palette(DVDSubContext *ctx, char *p)
+{
+    int i;
+
+    ctx->has_palette = 1;
+    for(i=0;i<16;i++) {
+        ctx->palette[i] = strtoul(p, &p, 16);
+        while(*p == ',' || av_isspace(*p))
+            p++;
+    }
+}
+
+static int dvdsub_parse_extradata(AVCodecContext *avctx)
+{
+    DVDSubContext *ctx = (DVDSubContext*) avctx->priv_data;
+    char *dataorig, *data;
+
+    if (!avctx->extradata || !avctx->extradata_size)
+        return 1;
+
+    dataorig = data = av_malloc(avctx->extradata_size+1);
+    if (!data)
+        return AVERROR(ENOMEM);
+    memcpy(data, avctx->extradata, avctx->extradata_size);
+    data[avctx->extradata_size] = '\0';
+
+    for(;;) {
+        int pos = strcspn(data, "\n\r");
+        if (pos==0 && *data==0)
+            break;
+
+        if (strncmp("palette:", data, 8) == 0) {
+            parse_palette(ctx, data + 8);
+        } else if (strncmp("size:", data, 5) == 0) {
+            int w, h;
+            if (sscanf(data + 5, "%dx%d", &w, &h) == 2 &&
+                av_image_check_size(w, h, 0, avctx) >= 0)
+                avcodec_set_dimensions(avctx, w, h);
+        }
+
+        data += pos;
+        data += strspn(data, "\n\r");
+    }
+
+    av_free(dataorig);
+    return 1;
+}
+
+static av_cold int dvdsub_init(AVCodecContext *avctx)
+{
+    DVDSubContext *ctx = avctx->priv_data;
+    int ret;
+
+    if ((ret = dvdsub_parse_extradata(avctx)) < 0)
+        return ret;
+
+    if (ctx->palette_str)
+        parse_palette(ctx, ctx->palette_str);
+    if (ctx->has_palette) {
+        int i;
+        av_log(avctx, AV_LOG_DEBUG, "palette:");
+        for(i=0;i<16;i++)
+            av_log(avctx, AV_LOG_DEBUG, " 0x%06x", ctx->palette[i]);
+        av_log(avctx, AV_LOG_DEBUG, "\n");
+    }
+
+    return 1;
+}
+
+#define OFFSET(field) offsetof(DVDSubContext, field)
+#define VD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+    { "palette", "set the global palette", OFFSET(palette_str), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, VD },
+    { NULL }
+};
+static const AVClass class = {
+    .class_name = "dvdsubdec",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_dvdsub_decoder = {
+    .name           = "dvdsub",
+    .type           = AVMEDIA_TYPE_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"),
+    .priv_class     = &class,
 };