[FFmpeg-cvslog] r20890 - in trunk: Changelog doc/general.texi libavcodec/Makefile libavcodec/allcodecs.c libavcodec/avcodec.h libavcodec/cdgraphics.c libavformat/Makefile libavformat/allformats.c libavformat/avfor...
vitor
subversion
Thu Dec 17 18:25:32 CET 2009
Author: vitor
Date: Thu Dec 17 18:25:31 2009
New Revision: 20890
Log:
CD+G demuxer and decoder
Patch by Michael Tison (gmail address: blackspike at ....)
Added:
trunk/libavcodec/cdgraphics.c
trunk/libavformat/cdg.c
Modified:
trunk/Changelog
trunk/doc/general.texi
trunk/libavcodec/Makefile
trunk/libavcodec/allcodecs.c
trunk/libavcodec/avcodec.h
trunk/libavformat/Makefile
trunk/libavformat/allformats.c
trunk/libavformat/avformat.h
Modified: trunk/Changelog
==============================================================================
--- trunk/Changelog Thu Dec 17 14:05:37 2009 (r20889)
+++ trunk/Changelog Thu Dec 17 18:25:31 2009 (r20890)
@@ -44,6 +44,7 @@ version <next>:
- MPEG-4 Audio Lossless Coding (ALS) decoder
- -formats option split into -formats, -codecs, -bsfs, and -protocols
- IV8 demuxer
+- CDG demuxer and decoder
Modified: trunk/doc/general.texi
==============================================================================
--- trunk/doc/general.texi Thu Dec 17 14:05:37 2009 (r20889)
+++ trunk/doc/general.texi Thu Dec 17 18:25:31 2009 (r20890)
@@ -63,6 +63,8 @@ library:
@tab Used in the game Cyberia from Interplay.
@item Delphine Software International CIN @tab @tab X
@tab Multimedia format used by Delphine Software games.
+ at item CD+G @tab @tab X
+ @tab Video format used by CD+G karaoke disks
@item Core Audio Format @tab @tab X
@tab Apple Core Audio Format
@item CRC testing format @tab X @tab
@@ -329,6 +331,8 @@ following image formats are supported:
@tab Codec used in Cyberia game.
@item CamStudio @tab @tab X
@tab fourcc: CSCD
+ at item CD+G @tab @tab X
+ @tab Video codec for CD+G karaoke disks
@item Chinese AVS video @tab @tab X
@tab AVS1-P2, JiZhun profile
@item Delphine Software International CIN video @tab @tab X
Modified: trunk/libavcodec/Makefile
==============================================================================
--- trunk/libavcodec/Makefile Thu Dec 17 14:05:37 2009 (r20889)
+++ trunk/libavcodec/Makefile Thu Dec 17 18:25:31 2009 (r20890)
@@ -68,6 +68,7 @@ OBJS-$(CONFIG_BMP_ENCODER) +
OBJS-$(CONFIG_C93_DECODER) += c93.o
OBJS-$(CONFIG_CAVS_DECODER) += cavs.o cavsdec.o cavsdsp.o \
mpeg12data.o mpegvideo.o
+OBJS-$(CONFIG_CDGRAPHICS_DECODER) += cdgraphics.o
OBJS-$(CONFIG_CINEPAK_DECODER) += cinepak.o
OBJS-$(CONFIG_CLJR_DECODER) += cljr.o
OBJS-$(CONFIG_CLJR_ENCODER) += cljr.o
Modified: trunk/libavcodec/allcodecs.c
==============================================================================
--- trunk/libavcodec/allcodecs.c Thu Dec 17 14:05:37 2009 (r20889)
+++ trunk/libavcodec/allcodecs.c Thu Dec 17 18:25:31 2009 (r20890)
@@ -71,6 +71,7 @@ void avcodec_register_all(void)
REGISTER_ENCDEC (BMP, bmp);
REGISTER_DECODER (C93, c93);
REGISTER_DECODER (CAVS, cavs);
+ REGISTER_DECODER (CDGRAPHICS, cdgraphics);
REGISTER_DECODER (CINEPAK, cinepak);
REGISTER_DECODER (CLJR, cljr);
REGISTER_DECODER (CSCD, cscd);
Modified: trunk/libavcodec/avcodec.h
==============================================================================
--- trunk/libavcodec/avcodec.h Thu Dec 17 14:05:37 2009 (r20889)
+++ trunk/libavcodec/avcodec.h Thu Dec 17 18:25:31 2009 (r20890)
@@ -200,6 +200,7 @@ enum CodecID {
CODEC_ID_MAD,
CODEC_ID_FRWU,
CODEC_ID_FLASHSV2,
+ CODEC_ID_CDGRAPHICS,
/* various PCM "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
Added: trunk/libavcodec/cdgraphics.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ trunk/libavcodec/cdgraphics.c Thu Dec 17 18:25:31 2009 (r20890)
@@ -0,0 +1,380 @@
+/*
+ * CD Graphics Video Decoder
+ * Copyright (c) 2009 Michael Tison
+ *
+ * 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"
+#include "bytestream.h"
+
+/**
+ * @file libavcodec/cdgraphics.c
+ * @brief CD Graphics Video Decoder
+ * @author Michael Tison
+ * @sa http://wiki.multimedia.cx/index.php?title=CD_Graphics
+ * @sa http://www.ccs.neu.edu/home/bchafy/cdb/info/cdg
+ */
+
+/// default screen sizes
+#define CDG_FULL_WIDTH 300
+#define CDG_FULL_HEIGHT 216
+#define CDG_DISPLAY_WIDTH 294
+#define CDG_DISPLAY_HEIGHT 204
+#define CDG_BORDER_WIDTH 6
+#define CDG_BORDER_HEIGHT 12
+
+/// masks
+#define CDG_COMMAND 0x09
+#define CDG_MASK 0x3F
+
+/// instruction codes
+#define CDG_INST_MEMORY_PRESET 1
+#define CDG_INST_BORDER_PRESET 2
+#define CDG_INST_TILE_BLOCK 6
+#define CDG_INST_SCROLL_PRESET 20
+#define CDG_INST_SCROLL_COPY 24
+#define CDG_INST_LOAD_PAL_LO 30
+#define CDG_INST_LOAD_PAL_HIGH 31
+#define CDG_INST_TILE_BLOCK_XOR 38
+
+/// data sizes
+#define CDG_PACKET_SIZE 24
+#define CDG_DATA_SIZE 16
+#define CDG_TILE_HEIGHT 12
+#define CDG_TILE_WIDTH 6
+#define CDG_MINIMUM_PKT_SIZE 6
+#define CDG_MINIMUM_SCROLL_SIZE 3
+#define CDG_HEADER_SIZE 8
+#define CDG_PALETTE_SIZE 16
+
+typedef struct CDGraphicsContext {
+ AVFrame frame;
+ int hscroll;
+ int vscroll;
+} CDGraphicsContext;
+
+static void cdg_init_frame(AVFrame *frame)
+{
+ avcodec_get_frame_defaults(frame);
+ frame->reference = 1;
+ frame->buffer_hints = FF_BUFFER_HINTS_VALID |
+ FF_BUFFER_HINTS_PRESERVE |
+ FF_BUFFER_HINTS_REUSABLE;
+}
+
+static av_cold int cdg_decode_init(AVCodecContext *avctx)
+{
+ CDGraphicsContext *cc = avctx->priv_data;
+
+ cdg_init_frame(&cc->frame);
+
+ avctx->width = CDG_FULL_WIDTH;
+ avctx->height = CDG_FULL_HEIGHT;
+ avctx->pix_fmt = PIX_FMT_PAL8;
+
+ return 0;
+}
+
+static void cdg_border_preset(CDGraphicsContext *cc, uint8_t *data)
+{
+ int y;
+ int lsize = cc->frame.linesize[0];
+ uint8_t *buf = cc->frame.data[0];
+ int color = data[0] & 0x0F;
+
+ if (!(data[1] & 0x0F)) {
+ /// fill the top and bottom borders
+ memset(buf, color, CDG_BORDER_HEIGHT * lsize);
+ memset(buf + (CDG_FULL_HEIGHT - CDG_BORDER_HEIGHT) * lsize,
+ color, CDG_BORDER_HEIGHT * lsize);
+
+ /// fill the side borders
+ for (y = CDG_BORDER_HEIGHT; y < CDG_FULL_HEIGHT - CDG_BORDER_HEIGHT; y++) {
+ memset(buf + y * lsize, color, CDG_BORDER_WIDTH);
+ memset(buf + CDG_FULL_WIDTH - CDG_BORDER_WIDTH + y * lsize,
+ color, CDG_BORDER_WIDTH);
+ }
+ }
+}
+
+static void cdg_load_palette(CDGraphicsContext *cc, uint8_t *data, int low)
+{
+ uint8_t r, g, b;
+ uint16_t color;
+ int i;
+ int array_offset = low ? 0 : 8;
+ uint32_t *palette = (uint32_t *) cc->frame.data[1];
+
+ for (i = 0; i < 8; i++) {
+ color = (data[2 * i] << 6) + (data[2 * i + 1] & 0x3F);
+ r = ((color >> 8) & 0x000F) * 17;
+ g = ((color >> 4) & 0x000F) * 17;
+ b = ((color ) & 0x000F) * 17;
+ palette[i + array_offset] = r << 16 | g << 8 | b;
+ }
+ cc->frame.palette_has_changed = 1;
+}
+
+static int cdg_tile_block(CDGraphicsContext *cc, uint8_t *data, int b)
+{
+ unsigned ci, ri;
+ int color;
+ int x, y;
+ int ai;
+ int stride = cc->frame.linesize[0];
+ uint8_t *buf = cc->frame.data[0];
+
+ ri = (data[2] & 0x1F) * CDG_TILE_HEIGHT + cc->vscroll;
+ ci = (data[3] & 0x3F) * CDG_TILE_WIDTH + cc->hscroll;
+
+ if (ri > (CDG_FULL_HEIGHT - CDG_TILE_HEIGHT))
+ return AVERROR(EINVAL);
+ if (ci > (CDG_FULL_WIDTH - CDG_TILE_WIDTH))
+ return AVERROR(EINVAL);
+
+ for (y = 0; y < CDG_TILE_HEIGHT; y++) {
+ for (x = 0; x < CDG_TILE_WIDTH; x++) {
+ if (!((data[4 + y] >> (5 - x)) & 0x01))
+ color = data[0] & 0x0F;
+ else
+ color = data[1] & 0x0F;
+
+ ai = ci + x + (stride * (ri + y));
+ if (b)
+ color ^= buf[ai];
+ buf[ai] = color;
+ }
+ }
+
+ return 0;
+}
+
+#define UP 2
+#define DOWN 1
+#define LEFT 2
+#define RIGHT 1
+
+static void cdg_copy_rect_buf(int out_tl_x, int out_tl_y, uint8_t *out,
+ int in_tl_x, int in_tl_y, uint8_t *in,
+ int w, int h, int stride)
+{
+ int y;
+
+ in += in_tl_x + in_tl_y * stride;
+ out += out_tl_x + out_tl_y * stride;
+ for (y = 0; y < h; y++)
+ memcpy(out + y * stride, in + y * stride, w);
+}
+
+static void cdg_fill_rect_preset(int tl_x, int tl_y, uint8_t *out,
+ int color, int w, int h, int stride)
+{
+ int y;
+
+ for (y = tl_y; y < tl_y + h; y++)
+ memset(out + tl_x + y * stride, color, w);
+}
+
+static void cdg_fill_wrapper(int out_tl_x, int out_tl_y, uint8_t *out,
+ int in_tl_x, int in_tl_y, uint8_t *in,
+ int color, int w, int h, int stride, int roll)
+{
+ if (roll) {
+ cdg_copy_rect_buf(out_tl_x, out_tl_y, out, in_tl_x, in_tl_y,
+ in, w, h, stride);
+ } else {
+ cdg_fill_rect_preset(out_tl_x, out_tl_y, out, color, w, h, stride);
+ }
+}
+
+static void cdg_scroll(CDGraphicsContext *cc, uint8_t *data,
+ AVFrame *new_frame, int roll_over)
+{
+ int color;
+ int hscmd, h_off, hinc, vscmd, v_off, vinc;
+ int y;
+ int stride = cc->frame.linesize[0];
+ uint8_t *in = cc->frame.data[0];
+ uint8_t *out = new_frame->data[0];
+
+ color = data[0] & 0x0F;
+ hscmd = (data[1] & 0x30) >> 4;
+ vscmd = (data[2] & 0x30) >> 4;
+
+ h_off = FFMIN(data[1] & 0x07, CDG_BORDER_WIDTH - 1);
+ v_off = FFMIN(data[2] & 0x07, CDG_BORDER_HEIGHT - 1);
+
+ /// find the difference and save the offset for cdg_tile_block usage
+ hinc = h_off - cc->hscroll;
+ vinc = v_off - cc->vscroll;
+ cc->hscroll = h_off;
+ cc->vscroll = v_off;
+
+ if (vscmd == UP)
+ vinc -= 12;
+ if (vscmd == DOWN)
+ vinc += 12;
+ if (hscmd == LEFT)
+ hinc -= 6;
+ if (hscmd == RIGHT)
+ hinc += 6;
+
+ if (!hinc && !vinc)
+ return;
+
+ memcpy(new_frame->data[1], cc->frame.data[1], CDG_PALETTE_SIZE * 4);
+
+ for (y = FFMAX(0, vinc); y < FFMIN(CDG_FULL_HEIGHT + vinc, CDG_FULL_HEIGHT); y++)
+ memcpy(out + FFMAX(0, hinc) + stride * y,
+ in + FFMAX(0, hinc) - hinc + (y - vinc) * stride,
+ FFMIN(stride + hinc, stride));
+
+ if (vinc > 0)
+ cdg_fill_wrapper(0, 0, out,
+ 0, CDG_FULL_HEIGHT - vinc, in, color,
+ stride, vinc, stride, roll_over);
+ else if (vinc < 0)
+ cdg_fill_wrapper(0, CDG_FULL_HEIGHT + vinc, out,
+ 0, 0, in, color,
+ stride, -1 * vinc, stride, roll_over);
+
+ if (hinc > 0)
+ cdg_fill_wrapper(0, 0, out,
+ CDG_FULL_WIDTH - hinc, 0, in, color,
+ hinc, CDG_FULL_HEIGHT, stride, roll_over);
+ else if (hinc < 0)
+ cdg_fill_wrapper(CDG_FULL_WIDTH + hinc, 0, out,
+ 0, 0, in, color,
+ -1 * hinc, CDG_FULL_HEIGHT, stride, roll_over);
+
+}
+
+static int cdg_decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size, AVPacket *avpkt)
+{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ int ret;
+ uint8_t command, inst;
+ uint8_t cdg_data[CDG_DATA_SIZE];
+ AVFrame new_frame;
+ CDGraphicsContext *cc = avctx->priv_data;
+
+ if (buf_size < CDG_MINIMUM_PKT_SIZE) {
+ av_log(avctx, AV_LOG_ERROR, "buffer too small for decoder\n");
+ return AVERROR(EINVAL);
+ }
+
+ ret = avctx->reget_buffer(avctx, &cc->frame);
+ if (ret) {
+ av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ return ret;
+ }
+
+ command = bytestream_get_byte(&buf);
+ inst = bytestream_get_byte(&buf);
+ inst &= CDG_MASK;
+ buf += 2; /// skipping 2 unneeded bytes
+ bytestream_get_buffer(&buf, cdg_data, buf_size - CDG_HEADER_SIZE);
+
+ if ((command & CDG_MASK) == CDG_COMMAND) {
+ switch (inst) {
+ case CDG_INST_MEMORY_PRESET:
+ if (!(cdg_data[1] & 0x0F))
+ memset(cc->frame.data[0], cdg_data[0] & 0x0F,
+ cc->frame.linesize[0] * CDG_FULL_HEIGHT);
+ break;
+ case CDG_INST_LOAD_PAL_LO:
+ case CDG_INST_LOAD_PAL_HIGH:
+ if (buf_size - CDG_HEADER_SIZE < CDG_DATA_SIZE) {
+ av_log(avctx, AV_LOG_ERROR, "buffer too small for loading palette\n");
+ return AVERROR(EINVAL);
+ }
+
+ cdg_load_palette(cc, cdg_data, inst == CDG_INST_LOAD_PAL_LO);
+ break;
+ case CDG_INST_BORDER_PRESET:
+ cdg_border_preset(cc, cdg_data);
+ break;
+ case CDG_INST_TILE_BLOCK_XOR:
+ case CDG_INST_TILE_BLOCK:
+ if (buf_size - CDG_HEADER_SIZE < CDG_DATA_SIZE) {
+ av_log(avctx, AV_LOG_ERROR, "buffer too small for drawing tile\n");
+ return AVERROR(EINVAL);
+ }
+
+ ret = cdg_tile_block(cc, cdg_data, inst == CDG_INST_TILE_BLOCK_XOR);
+ if (ret) {
+ av_log(avctx, AV_LOG_ERROR, "tile is out of range\n");
+ return ret;
+ }
+ break;
+ case CDG_INST_SCROLL_PRESET:
+ case CDG_INST_SCROLL_COPY:
+ if (buf_size - CDG_HEADER_SIZE < CDG_MINIMUM_SCROLL_SIZE) {
+ av_log(avctx, AV_LOG_ERROR, "buffer too small for scrolling\n");
+ return AVERROR(EINVAL);
+ }
+
+ cdg_init_frame(&new_frame);
+ ret = avctx->get_buffer(avctx, &new_frame);
+ if (ret) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+
+ cdg_scroll(cc, cdg_data, &new_frame, inst == CDG_INST_SCROLL_COPY);
+ avctx->release_buffer(avctx, &cc->frame);
+ cc->frame = new_frame;
+ break;
+ default:
+ break;
+ }
+
+ *data_size = sizeof(AVFrame);
+ } else {
+ *data_size = 0;
+ buf_size = 0;
+ }
+
+ *(AVFrame *) data = cc->frame;
+ return buf_size;
+}
+
+static av_cold int cdg_decode_end(AVCodecContext *avctx)
+{
+ CDGraphicsContext *cc = avctx->priv_data;
+
+ if (cc->frame.data[0])
+ avctx->release_buffer(avctx, &cc->frame);
+
+ return 0;
+}
+
+AVCodec cdgraphics_decoder = {
+ "cdgraphics",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_CDGRAPHICS,
+ sizeof(CDGraphicsContext),
+ cdg_decode_init,
+ NULL,
+ cdg_decode_end,
+ cdg_decode_frame,
+ CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("CD Graphics video"),
+};
Modified: trunk/libavformat/Makefile
==============================================================================
--- trunk/libavformat/Makefile Thu Dec 17 14:05:37 2009 (r20889)
+++ trunk/libavformat/Makefile Thu Dec 17 18:25:31 2009 (r20890)
@@ -44,6 +44,7 @@ OBJS-$(CONFIG_BFI_DEMUXER)
OBJS-$(CONFIG_C93_DEMUXER) += c93.o vocdec.o voc.o
OBJS-$(CONFIG_CAF_DEMUXER) += cafdec.o caf.o mov.o riff.o isom.o
OBJS-$(CONFIG_CAVSVIDEO_DEMUXER) += raw.o
+OBJS-$(CONFIG_CDG_DEMUXER) += cdg.o
OBJS-$(CONFIG_CRC_MUXER) += crcenc.o
OBJS-$(CONFIG_DAUD_DEMUXER) += daud.o
OBJS-$(CONFIG_DAUD_MUXER) += daud.o
Modified: trunk/libavformat/allformats.c
==============================================================================
--- trunk/libavformat/allformats.c Thu Dec 17 14:05:37 2009 (r20889)
+++ trunk/libavformat/allformats.c Thu Dec 17 18:25:31 2009 (r20890)
@@ -68,6 +68,7 @@ void av_register_all(void)
REGISTER_DEMUXER (C93, c93);
REGISTER_DEMUXER (CAF, caf);
REGISTER_DEMUXER (CAVSVIDEO, cavsvideo);
+ REGISTER_DEMUXER (CDG, cdg);
REGISTER_MUXER (CRC, crc);
REGISTER_MUXDEMUX (DAUD, daud);
REGISTER_MUXDEMUX (DIRAC, dirac);
Modified: trunk/libavformat/avformat.h
==============================================================================
--- trunk/libavformat/avformat.h Thu Dec 17 14:05:37 2009 (r20889)
+++ trunk/libavformat/avformat.h Thu Dec 17 18:25:31 2009 (r20890)
@@ -22,7 +22,7 @@
#define AVFORMAT_AVFORMAT_H
#define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 43
+#define LIBAVFORMAT_VERSION_MINOR 44
#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
Added: trunk/libavformat/cdg.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ trunk/libavformat/cdg.c Thu Dec 17 18:25:31 2009 (r20890)
@@ -0,0 +1,66 @@
+/*
+ * CD Graphics Demuxer
+ * Copyright (c) 2009 Michael Tison
+ *
+ * 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 "avformat.h"
+
+#define CDG_PACKET_SIZE 24
+
+static int read_header(AVFormatContext *s, AVFormatParameters *ap)
+{
+ AVStream *vst;
+ int ret;
+
+ vst = av_new_stream(s, 0);
+ if (!vst)
+ return AVERROR(ENOMEM);
+
+ vst->codec->codec_type = CODEC_TYPE_VIDEO;
+ vst->codec->codec_id = CODEC_ID_CDGRAPHICS;
+
+ /// 75 sectors/sec * 4 packets/sector = 300 packets/sec
+ av_set_pts_info(vst, 32, 1, 300);
+
+ ret = url_fsize(s->pb);
+ if (ret > 0)
+ vst->duration = (ret * vst->time_base.den) / (CDG_PACKET_SIZE * 300);
+
+ return 0;
+}
+
+static int read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ int ret;
+
+ ret = av_get_packet(s->pb, pkt, CDG_PACKET_SIZE);
+
+ pkt->stream_index = 0;
+ return ret;
+}
+
+AVInputFormat cdg_demuxer = {
+ "cdg",
+ NULL_IF_CONFIG_SMALL("CD Graphics Format"),
+ 0,
+ NULL,
+ read_header,
+ read_packet,
+ .extensions = "cdg"
+};
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