From a3d995c1eb98e38186bf9ed677809c442a7dab35 Mon Sep 17 00:00:00 2001 From: Michael Tison Date: Thu, 17 Dec 2009 17:25:31 +0000 Subject: [PATCH] CD+G demuxer and decoder Patch by Michael Tison (gmail address: blackspike@....) Originally committed as revision 20890 to svn://svn.ffmpeg.org/ffmpeg/trunk --- Changelog | 1 + doc/general.texi | 4 + libavcodec/Makefile | 1 + libavcodec/allcodecs.c | 1 + libavcodec/avcodec.h | 1 + libavcodec/cdgraphics.c | 380 +++++++++++++++++++++++++++++++++++++++ libavformat/Makefile | 1 + libavformat/allformats.c | 1 + libavformat/avformat.h | 2 +- libavformat/cdg.c | 66 +++++++ 10 files changed, 457 insertions(+), 1 deletion(-) create mode 100644 libavcodec/cdgraphics.c create mode 100644 libavformat/cdg.c diff --git a/Changelog b/Changelog index 838f24da9f..718d8db708 100644 --- a/Changelog +++ b/Changelog @@ -44,6 +44,7 @@ version : - MPEG-4 Audio Lossless Coding (ALS) decoder - -formats option split into -formats, -codecs, -bsfs, and -protocols - IV8 demuxer +- CDG demuxer and decoder diff --git a/doc/general.texi b/doc/general.texi index 17c080488b..67c2a13517 100644 --- a/doc/general.texi +++ b/doc/general.texi @@ -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. +@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 +@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 diff --git a/libavcodec/Makefile b/libavcodec/Makefile index f865d53d7c..a7858417f4 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -68,6 +68,7 @@ OBJS-$(CONFIG_BMP_ENCODER) += bmpenc.o OBJS-$(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 diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c index 6a2eec26f2..3b3c4d420b 100644 --- a/libavcodec/allcodecs.c +++ b/libavcodec/allcodecs.c @@ -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); diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h index 004af71858..5f17f83bf8 100644 --- a/libavcodec/avcodec.h +++ b/libavcodec/avcodec.h @@ -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, diff --git a/libavcodec/cdgraphics.c b/libavcodec/cdgraphics.c new file mode 100644 index 0000000000..fa835b9897 --- /dev/null +++ b/libavcodec/cdgraphics.c @@ -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"), +}; diff --git a/libavformat/Makefile b/libavformat/Makefile index 620223361d..2b3e186413 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -44,6 +44,7 @@ OBJS-$(CONFIG_BFI_DEMUXER) += bfi.o 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 diff --git a/libavformat/allformats.c b/libavformat/allformats.c index 0dfaa93b6c..d57376dd91 100644 --- a/libavformat/allformats.c +++ b/libavformat/allformats.c @@ -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); diff --git a/libavformat/avformat.h b/libavformat/avformat.h index 4cc2fa68c1..8e8ab91b2d 100644 --- a/libavformat/avformat.h +++ b/libavformat/avformat.h @@ -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, \ diff --git a/libavformat/cdg.c b/libavformat/cdg.c new file mode 100644 index 0000000000..f40028d2f9 --- /dev/null +++ b/libavformat/cdg.c @@ -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" +}; -- GitLab