Rename dvdsub.c to dvdsubdec.c.

Originally committed as revision 6815 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 0 insertions, 477 deletions

diff --git a/libavcodec/dvdsub.c b/libavcodec/dvdsub.c
deleted file mode 100644
index 9a0dd7756d..0000000000
--- a/libavcodec/dvdsub.c
+++ /dev/null
@@ -1,477 +0,0 @@
-/*
- * DVD subtitle decoding for ffmpeg
- * Copyright (c) 2005 Fabrice Bellard.
- *
- * 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
- */
-#include "avcodec.h"
-
-//#define DEBUG
-
-static int dvdsub_init_decoder(AVCodecContext *avctx)
-{
-    return 0;
-}
-
-static uint16_t getbe16(const uint8_t *p)
-{
-    return (p[0] << 8) | p[1];
-}
-
-static int get_nibble(const uint8_t *buf, int nibble_offset)
-{
-    return (buf[nibble_offset >> 1] >> ((1 - (nibble_offset & 1)) << 2)) & 0xf;
-}
-
-static int decode_rle(uint8_t *bitmap, int linesize, int w, int h,
-                      const uint8_t *buf, int nibble_offset, int buf_size)
-{
-    unsigned int v;
-    int x, y, len, color, nibble_end;
-    uint8_t *d;
-
-    nibble_end = buf_size * 2;
-    x = 0;
-    y = 0;
-    d = bitmap;
-    for(;;) {
-        if (nibble_offset >= nibble_end)
-            return -1;
-        v = get_nibble(buf, nibble_offset++);
-        if (v < 0x4) {
-            v = (v << 4) | get_nibble(buf, nibble_offset++);
-            if (v < 0x10) {
-                v = (v << 4) | get_nibble(buf, nibble_offset++);
-                if (v < 0x040) {
-                    v = (v << 4) | get_nibble(buf, nibble_offset++);
-                    if (v < 4) {
-                        v |= (w - x) << 2;
-                    }
-                }
-            }
-        }
-        len = v >> 2;
-        if (len > (w - x))
-            len = (w - x);
-        color = v & 0x03;
-        memset(d + x, color, len);
-        x += len;
-        if (x >= w) {
-            y++;
-            if (y >= h)
-                break;
-            d += linesize;
-            x = 0;
-            /* byte align */
-            nibble_offset += (nibble_offset & 1);
-        }
-    }
-    return 0;
-}
-
-static void guess_palette(uint32_t *rgba_palette,
-                          uint8_t *palette,
-                          uint8_t *alpha,
-                          uint32_t subtitle_color)
-{
-    uint8_t color_used[16];
-    int nb_opaque_colors, i, level, j, r, g, b;
-
-    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[palette[i]]) {
-            color_used[palette[i]] = 1;
-            nb_opaque_colors++;
-        }
-    }
-
-    if (nb_opaque_colors == 0)
-        return;
-
-    j = nb_opaque_colors;
-    memset(color_used, 0, 16);
-    for(i = 0; i < 4; i++) {
-        if (alpha[i] != 0) {
-            if (!color_used[palette[i]])  {
-                level = (0xff * j) / nb_opaque_colors;
-                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[palette[i]] = (i + 1);
-                j--;
-            } else {
-                rgba_palette[i] = (rgba_palette[color_used[palette[i]] - 1] & 0x00ffffff) |
-                                    ((alpha[i] * 17) << 24);
-            }
-        }
-    }
-}
-
-static int decode_dvd_subtitles(AVSubtitle *sub_header,
-                                const uint8_t *buf, int buf_size)
-{
-    int cmd_pos, pos, cmd, x1, y1, x2, y2, offset1, offset2, next_cmd_pos;
-    uint8_t palette[4], alpha[4];
-    int date;
-    int i;
-    int is_menu = 0;
-
-    if (buf_size < 4)
-        return -1;
-    sub_header->rects = NULL;
-    sub_header->num_rects = 0;
-    sub_header->start_display_time = 0;
-    sub_header->end_display_time = 0;
-
-    cmd_pos = getbe16(buf + 2);
-    while ((cmd_pos + 4) < buf_size) {
-        date = getbe16(buf + cmd_pos);
-        next_cmd_pos = getbe16(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
-        pos = cmd_pos + 4;
-        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
-            switch(cmd) {
-            case 0x00:
-                /* menu subpicture */
-                is_menu = 1;
-                break;
-            case 0x01:
-                /* set start date */
-                sub_header->start_display_time = (date << 10) / 90;
-                break;
-            case 0x02:
-                /* set end date */
-                sub_header->end_display_time = (date << 10) / 90;
-                break;
-            case 0x03:
-                /* set palette */
-                if ((buf_size - pos) < 2)
-                    goto fail;
-                palette[3] = buf[pos] >> 4;
-                palette[2] = buf[pos] & 0x0f;
-                palette[1] = buf[pos + 1] >> 4;
-                palette[0] = buf[pos + 1] & 0x0f;
-                pos += 2;
-                break;
-            case 0x04:
-                /* set alpha */
-                if ((buf_size - pos) < 2)
-                    goto fail;
-                alpha[3] = buf[pos] >> 4;
-                alpha[2] = buf[pos] & 0x0f;
-                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
-                break;
-            case 0x05:
-                if ((buf_size - pos) < 6)
-                    goto fail;
-                x1 = (buf[pos] << 4) | (buf[pos + 1] >> 4);
-                x2 = ((buf[pos + 1] & 0x0f) << 8) | buf[pos + 2];
-                y1 = (buf[pos + 3] << 4) | (buf[pos + 4] >> 4);
-                y2 = ((buf[pos + 4] & 0x0f) << 8) | buf[pos + 5];
-#ifdef DEBUG
-                av_log(NULL, AV_LOG_INFO, "x1=%d x2=%d y1=%d y2=%d\n",
-                       x1, x2, y1, y2);
-#endif
-                pos += 6;
-                break;
-            case 0x06:
-                if ((buf_size - pos) < 4)
-                    goto fail;
-                offset1 = getbe16(buf + pos);
-                offset2 = getbe16(buf + pos + 2);
-#ifdef DEBUG
-                av_log(NULL, AV_LOG_INFO, "offset1=0x%04x offset2=0x%04x\n", offset1, offset2);
-#endif
-                pos += 4;
-                break;
-            case 0xff:
-            default:
-                goto the_end;
-            }
-        }
-    the_end:
-        if (offset1 >= 0) {
-            int w, h;
-            uint8_t *bitmap;
-
-            /* decode the bitmap */
-            w = x2 - x1 + 1;
-            if (w < 0)
-                w = 0;
-            h = y2 - y1;
-            if (h < 0)
-                h = 0;
-            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);
-                    sub_header->num_rects = 0;
-                }
-
-                bitmap = av_malloc(w * h);
-                sub_header->rects = av_mallocz(sizeof(AVSubtitleRect));
-                sub_header->num_rects = 1;
-                sub_header->rects[0].rgba_palette = av_malloc(4 * 4);
-                decode_rle(bitmap, w * 2, w, h / 2,
-                           buf, offset1 * 2, buf_size);
-                decode_rle(bitmap + w, w * 2, w, h / 2,
-                           buf, offset2 * 2, buf_size);
-                guess_palette(sub_header->rects[0].rgba_palette,
-                              palette, alpha, 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].nb_colors = 4;
-                sub_header->rects[0].linesize = w;
-                sub_header->rects[0].bitmap = bitmap;
-            }
-        }
-        if (next_cmd_pos == cmd_pos)
-            break;
-        cmd_pos = next_cmd_pos;
-    }
-    if (sub_header->num_rects > 0)
-        return is_menu;
- fail:
-    return -1;
-}
-
-static int is_transp(const uint8_t *buf, int pitch, int n,
-                     const uint8_t *transp_color)
-{
-    int i;
-    for(i = 0; i < n; i++) {
-        if (!transp_color[*buf])
-            return 0;
-        buf += pitch;
-    }
-    return 1;
-}
-
-/* return 0 if empty rectangle, 1 if non empty */
-static int find_smallest_bounding_rectangle(AVSubtitle *s)
-{
-    uint8_t transp_color[256];
-    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)
-        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)
-            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))
-        y1++;
-    if (y1 == s->rects[0].h) {
-        av_freep(&s->rects[0].bitmap);
-        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--;
-    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))
-        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,
-                                  transp_color))
-        x2--;
-    w = x2 - x1 + 1;
-    h = y2 - y1 + 1;
-    bitmap = av_malloc(w * h);
-    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);
-    }
-    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;
-    return 1;
-}
-
-static int dvdsub_close_decoder(AVCodecContext *avctx)
-{
-    return 0;
-}
-
-#ifdef DEBUG
-#undef fprintf
-static void ppm_save(const char *filename, uint8_t *bitmap, int w, int h,
-                     uint32_t *rgba_palette)
-{
-    int x, y, v;
-    FILE *f;
-
-    f = fopen(filename, "w");
-    if (!f) {
-        perror(filename);
-        exit(1);
-    }
-    fprintf(f, "P6\n"
-            "%d %d\n"
-            "%d\n",
-            w, h, 255);
-    for(y = 0; y < h; y++) {
-        for(x = 0; x < w; x++) {
-            v = rgba_palette[bitmap[y * w + x]];
-            putc((v >> 16) & 0xff, f);
-            putc((v >> 8) & 0xff, f);
-            putc((v >> 0) & 0xff, f);
-        }
-    }
-    fclose(f);
-}
-#endif
-
-static int dvdsub_decode(AVCodecContext *avctx,
-                         void *data, int *data_size,
-                         uint8_t *buf, int buf_size)
-{
-    AVSubtitle *sub = (void *)data;
-    int is_menu;
-
-    is_menu = decode_dvd_subtitles(sub, buf, buf_size);
-
-    if (is_menu < 0) {
-    no_subtitle:
-        *data_size = 0;
-
-        return buf_size;
-    }
-    if (!is_menu && find_smallest_bounding_rectangle(sub) == 0)
-        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);
-#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,
-};
-
-/* parser definition */
-typedef struct DVDSubParseContext {
-    uint8_t *packet;
-    int packet_len;
-    int packet_index;
-} DVDSubParseContext;
-
-static int dvdsub_parse_init(AVCodecParserContext *s)
-{
-    return 0;
-}
-
-static int dvdsub_parse(AVCodecParserContext *s,
-                        AVCodecContext *avctx,
-                        uint8_t **poutbuf, int *poutbuf_size,
-                        const uint8_t *buf, int buf_size)
-{
-    DVDSubParseContext *pc = s->priv_data;
-
-    if (pc->packet_index == 0) {
-        if (buf_size < 2)
-            return 0;
-        pc->packet_len = (buf[0] << 8) | buf[1];
-        av_freep(&pc->packet);
-        pc->packet = av_malloc(pc->packet_len);
-    }
-    if (pc->packet) {
-        if (pc->packet_index + buf_size <= pc->packet_len) {
-            memcpy(pc->packet + pc->packet_index, buf, buf_size);
-            pc->packet_index += buf_size;
-            if (pc->packet_index >= pc->packet_len) {
-                *poutbuf = pc->packet;
-                *poutbuf_size = pc->packet_len;
-                pc->packet_index = 0;
-                return buf_size;
-            }
-        } else {
-            /* erroneous size */
-            pc->packet_index = 0;
-        }
-    }
-    *poutbuf = NULL;
-    *poutbuf_size = 0;
-    return buf_size;
-}
-
-static void dvdsub_parse_close(AVCodecParserContext *s)
-{
-    DVDSubParseContext *pc = s->priv_data;
-    av_freep(&pc->packet);
-}
-
-AVCodecParser dvdsub_parser = {
-    { CODEC_ID_DVD_SUBTITLE },
-    sizeof(DVDSubParseContext),
-    dvdsub_parse_init,
-    dvdsub_parse,
-    dvdsub_parse_close,
-};